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Sample records for mayor zinc sources

  1. The bioavailability of four zinc oxide sources and zinc sulphate in broiler chickens

    OpenAIRE

    Veldkamp, T.; Diepen, van, J.T.M.; Bikker, P.

    2014-01-01

    Zinc is an essential trace element for all farm animal species. It is commonly included in animal diets as zinc oxide, zinc sulphate or organically bound zinc. Umicore Zinc Chemicals developed zinc oxide products with different mean particle sizes. Umicore Zinc Chemicals requested Wageningen UR Livestock Research to determine the bioavailability of four zinc oxide sources and zinc sulphate in broiler chickens. A precise estimate of the bioavailability of zinc sources is required both for fulf...

  2. Effect of zinc sources on yield and utilization of zinc in rice-wheat sequence

    International Nuclear Information System (INIS)

    Deb, D.L.

    1990-01-01

    A field experiment was conducted on an inceptisol of Delhi to evaluate three sources of zinc, namely, zinc sulphate, zincated urea and zinc oxide on yield and utilization of zinc in rice-wheat sequence. Results indicated that, amongst the three zinc sources, zinc sulphate and zincated urea gave the best performance in increasing the grain yield of rice whereas zinc oxide depressed the grain yield of wheat significantly when compared to other treatments. The highest Zn derived from fertilizer and its utilization was obtained with zinc sulphate for both rice and wheat crops. (author). 9 refs., 4 tabs

  3. Evolution of the zinc compound nanostructures in zinc acetate single-source solution

    International Nuclear Information System (INIS)

    Wang Ying; Li Yinhua; Zhou Zhengzhi; Zu Xihong; Deng Yulin

    2011-01-01

    A series of nanostructured zinc compounds with different nanostructures such as nanobelts, flake-like, flower-like, and twinning crystals was synthesized using zinc acetate (Zn(Ac) 2 ) as a single-source. The evolution of the zinc compounds from layered basic zinc acetate (LBZA) to bilayered basic zinc acetate (BLBZA) and twinned ZnO nano/microcrystal was studied. The low-angle X-ray diffraction spectra indicate the layered spacing is 1.34 and 2.1 nm for LBZA and BLBZA, respectively. The Fourier transform infrared (FTIR) spectra results confirmed that the bonding force of acetate anion with zinc cations decreases with the phase transformation from Zn(Ac) 2 to BLBZA, and finally to LBZA. The OH − groups gradually replaced the acetate groups coordinated to the matrix zinc cation, and the acetate groups were released completely. Finally, the Zn(OH) 2 and ZnO were formed at high temperature. The conversion process from Zn(Ac) 2 to ZnO with release of acetate anions can be described as Zn(Ac) 2 → BLBZA → LBZA → Zn(OH) 2 → ZnO.

  4. The bioavailability of four zinc oxide sources and zinc sulphate in broiler chickens

    NARCIS (Netherlands)

    Veldkamp, T.; Diepen, van J.T.M.; Bikker, P.

    2014-01-01

    Zinc is an essential trace element for all farm animal species. It is commonly included in animal diets as zinc oxide, zinc sulphate or organically bound zinc. Umicore Zinc Chemicals developed zinc oxide products with different mean particle sizes. Umicore Zinc Chemicals requested Wageningen UR

  5. Zinc

    Science.gov (United States)

    ... Consumer Datos en español Health Professional Other Resources Zinc Fact Sheet for Consumers Have a question? Ask ... find out more about zinc? Disclaimer What is zinc and what does it do? Zinc is a ...

  6. Supplementation of diets for Santa Ines sheep with organic and inorganic zinc sources

    Directory of Open Access Journals (Sweden)

    Flávio Garcia Vilela

    2012-09-01

    Full Text Available This research was conducted with objective to evaluate the effect of different zinc (Zn sources and doses in the diet for Santa Ines sheep. Forty lambs at weaning, with 18.4 kg of body weight were supplemented with three different sources of zinc (zinc oxide (ZnO, zinc amino acid and zinc proteinate and three doses of zinc (200, 400 and 600 mg/kg DM added to the basal diet. At every 28 days, animals were weighted and blood samples were collected for analyses of zinc (Zn, alkaline phosphatase and immunoglobulin G (IgG and M (IgM. At the end of experiment, liver samples were collected for determination of the hepatic zinc levels. Zinc was analyzed with atomic absorption spectrophotometer, while phosphatase alkaline and immunoglobulins G and M were analyzed using Laborlab and Bioclin kits, respectively. There was no effect of diets on phosphatase alkaline levels and hepatic zinc, but there was difference in the plasmatic zinc levels and IgG and IgM levels. Based on the accumulation of hepatic zinc, the estimate of the zinc bioavailability, through the regression equation, showed that supplementation with organic and inorganic sources of zinc did not differ in the diet of Santa Ines sheep.

  7. Zinc

    Science.gov (United States)

    ... Some early research suggests that zinc supplementation increases sperm count, testosterone levels, and pregnancy rates in infertile men with low testosterone levels. Other research suggests that taking zinc can improve sperm shape in men with moderate enlargement of a ...

  8. Evaluation of sources, rates and methods of zinc fertilizer applications in flooded rice

    International Nuclear Information System (INIS)

    Sarkar, A.K.; Deb, D.L.

    1981-01-01

    A pot experiment was conducted using 65 Zn as tracer to evaluate the different sources, levels and methods of zinc fertilization in flooded rice. Results indicated that zinc sulphate was either at par or slightly superior to zincated urea from the point of view of yield and total zinc uptake by rice. The Zndff percent was found to be the highest with zincated urea and the lowest was observed with zinc oxide. 5 and 10 kg/ha levels of zinc were statistically at par in this regard. Among the different methods, surface application and thorough mixing with soil were comparable. Root dipping in 1 percent zinc oxide suspension and application of zinc in irrigation water also indicated high zinc absorption by the rice plant. (author)

  9. Seasonal and spatial variation of diffuse (non-point) source zinc pollution in a historically metal mined river catchment, UK

    Energy Technology Data Exchange (ETDEWEB)

    Gozzard, E., E-mail: emgo@ceh.ac.uk [Hydrogeochemical Engineering Research and Outreach Group, School of Civil Engineering and Geosciences, Newcastle University, Newcastle upon Tyne NE1 7RU (United Kingdom); Mayes, W.M., E-mail: W.Mayes@hull.ac.uk [Hydrogeochemical Engineering Research and Outreach Group, School of Civil Engineering and Geosciences, Newcastle University, Newcastle upon Tyne NE1 7RU (United Kingdom); Potter, H.A.B., E-mail: hugh.potter@environment-agency.gov.uk [Environment Agency England and Wales, c/o Institute for Research on Environment and Sustainability, Newcastle University, Newcastle upon Tyne NE1 7RU (United Kingdom); Jarvis, A.P., E-mail: a.p.jarvis@ncl.ac.uk [Hydrogeochemical Engineering Research and Outreach Group, School of Civil Engineering and Geosciences, Newcastle University, Newcastle upon Tyne NE1 7RU (United Kingdom)

    2011-10-15

    Quantifying diffuse sources of pollution is becoming increasingly important when characterising river catchments in entirety - a prerequisite for environmental management. This study examines both low and high flow events, as well as spatial variability, in order to assess point and diffuse components of zinc pollution within the River West Allen catchment, which lies within the northern England lead-zinc Orefield. Zinc levels in the river are elevated under all flow regimes, and are of environmental concern. Diffuse components are of little importance at low flow, with point source mine water discharges dominating instream zinc concentration and load. During higher river flows 90% of the instream zinc load is attributed to diffuse sources, where inputs from resuspension of metal-rich sediments, and groundwater influx are likely to be more dominant. Remediating point mine water discharges should significantly improve water quality at lower flows, but contribution from diffuse sources will continue to elevate zinc flux at higher flows. - Highlights: > Zinc concentrations breach EU quality thresholds under all river flow conditions. > Contributions from point sources dominate instream zinc dynamics in low flow. > Contributions from diffuse sources dominate instream zinc dynamics in high flow. > Important diffuse sources include river-bed sediment resuspension and groundwater influx. > Diffuse sources would still create significant instream pollution, even with point source treatment. - Diffuse zinc sources are an important source of instream contamination to mine-impacted rivers under varying flow conditions.

  10. Assessment of intake inadequacy and food sources of zinc of people in China

    NARCIS (Netherlands)

    Ma Guansheng,; Li Yanping,; Kok, F.J.; Xiaoguang, Y.

    2007-01-01

    Objectives: To assess the intake inadequacy and food sources of zinc of people in China. Design and subjects: Diets of 68 962 subjects aged 2-101 years (urban 21103, rural 47859) in the 2002 China National Nutrition and Health Survey were analysed. Dietary intake was assessed using 24-hour recall

  11. Zinc uptake and utilisation in wetland rice as influenced by zinc sources

    International Nuclear Information System (INIS)

    Raja Rajan, A.

    1994-01-01

    Soil application of Zn is by far the most common and generally successful method of application to rice. Comparison of the effectiveness of soil applications of Zn necessarily involves simultaneous comparison of different sources. Applying Zn in combination with macronutrient fertilizers is convenient and allows more uniform distribution. Studies have indicated marked differences in Zn availability, uptake and utilisation resulting from the macronutrient fertilizer with which it is applied. This study was undertaken to evaluate the effect of a few sources of Zn on the yield, Zn uptake and utilisation in rice in two major rice grown soil series of Tamil Nadu. (author). 7 refs., 3 tabs

  12. Simple biosynthesis of zinc oxide nanoparticles using nature's source, and it's in vitro bio-activity

    Science.gov (United States)

    Zare, Elham; Pourseyedi, Shahram; Khatami, Mehrdad; Darezereshki, Esmaeel

    2017-10-01

    Nanoparticles with antimicrobial activity, especially as a new class of biomedical materials for use in increasing the level of public health in daily life have emerged. In this study, green synthesis of zinc oxide) ZnO(nanoparticles was studied by Cuminum cyminum (cumin) as novel natural source and zinc nitrate [Zn(NO3)2] as Zn2+ source. The results showed that parameters such as concentration, time, temperature and pH have a direct impact on the synthesis of zinc nanoparticles and change in any of the factors causing the change in the process of synthesis. The properties of synthesized nanoparticles were examined by UV-visible Spectrophotometer, X-ray diffraction spectroscopy and transmission electron microscopy (TEM). The UV-visible spectroscopy presented the absorption peak in the range of 370 nm. Transmission electron microscopy images of synthesized nanoparticles are mainly spherical or oval with an average size of about 7 nm. The effect of antimicrobial nanoparticles calculated using disk diffusion method and broth MIC and MBC in different strains of bacteria, which showed that gram positive and negative were sensitive to zinc oxide nanoparticles. The sensitivity of gram-negative bacteria was more.

  13. Recent trends and current practices for secondary processing of zinc and lead. Part II: zinc recovery from secondary sources.

    Science.gov (United States)

    Sahu, Kamala Kanta; Agrawal, Archana; Pandey, Banshi Dhar

    2004-08-01

    Almost all metallurgical processes are associated with the generation of wastes and residues that may be hazardous or non-hazardous in nature depending upon the criteria specified by institutions such as the US Environment Protection Agency, etc. Wastes containing heavy and toxic metals such as arsenic, cadmium, chromium, nickel, lead, copper, mercury, zinc, etc., that are present beyond permissible limits deemed to be treated or disposed of, and non-hazardous wastes can be utilized for metal recovery or safe disposal. Zinc is in growing demand all over the world. In India, a major amount of zinc is imported and therefore processing of zinc secondaries will assist in satisfying the gap between demand and supply to some extent. This report mainly focuses on the current practices and recent trends on the secondary processing of zinc. Attempts made by various laboratories to develop ecofriendly processes for the recovery of zinc from secondary raw materials are also described and discussed.

  14. Effect of different chelated zinc sources on the growth and yield of maize (Zea mays L.

    Directory of Open Access Journals (Sweden)

    M. Tahir

    2009-05-01

    Full Text Available A field study was conducted at Agronomic Research Area, University of Agriculture, Faisalabad during spring, 2007 to evaluate the effect of different chelated zinc sources on growth and yield of maize (Zea mays L.. Crop was sown on well prepared soil in 1st week of March, 2007. The experiment was laid out according to randomized complete block design. The treatments comprised of different chelated zinc sources: ZnSO4-DTPA, ZnSO4-Fulvate, ZnSO4-Lignosulphonate, ZnSO4-EDTA and ZnSO4-H2O along with control (no zinc, repeated three times. Results showed that number of cobs plant-1, grain rows cob-1 and oil contents did not differ significantly. However, differences among treatments for plant height at harvest (cm, leaf area plant-1 (cm2, stem diameter (cm, cob length (cm, cob diameter (cm, 100-grains weight (g, number of grains cob-1, grains weight cob-1(g, biological yield (tons ha-1, grain yield (tons ha-1 and protein contents (% were significantly higher. Moreover, results also revealed that ZnSO4-DPTA was found the most effective Zn chelated source among all the treatments. Rest of the chelating agents were not too impressive as they showed varied response for different variables. The result of this experiment suggest further experimentation to explore behaviour of Zn-DTPA with other macro and micro nutrients and to calculate cost benefit ratio for use ofZn chelated compounds.

  15. Multivariate statistical assessment of heavy metal pollution sources of groundwater around a lead and zinc plant

    Directory of Open Access Journals (Sweden)

    Zamani Abbas Ali

    2012-12-01

    Full Text Available Abstract The contamination of groundwater by heavy metal ions around a lead and zinc plant has been studied. As a case study groundwater contamination in Bonab Industrial Estate (Zanjan-Iran for iron, cobalt, nickel, copper, zinc, cadmium and lead content was investigated using differential pulse polarography (DPP. Although, cobalt, copper and zinc were found correspondingly in 47.8%, 100.0%, and 100.0% of the samples, they did not contain these metals above their maximum contaminant levels (MCLs. Cadmium was detected in 65.2% of the samples and 17.4% of them were polluted by this metal. All samples contained detectable levels of lead and iron with 8.7% and 13.0% of the samples higher than their MCLs. Nickel was also found in 78.3% of the samples, out of which 8.7% were polluted. In general, the results revealed the contamination of groundwater sources in the studied zone. The higher health risks are related to lead, nickel, and cadmium ions. Multivariate statistical techniques were applied for interpreting the experimental data and giving a description for the sources. The data analysis showed correlations and similarities between investigated heavy metals and helps to classify these ion groups. Cluster analysis identified five clusters among the studied heavy metals. Cluster 1 consisted of Pb, Cu, and cluster 3 included Cd, Fe; also each of the elements Zn, Co and Ni was located in groups with single member. The same results were obtained by factor analysis. Statistical investigations revealed that anthropogenic factors and notably lead and zinc plant and pedo-geochemical pollution sources are influencing water quality in the studied area.

  16. Multivariate statistical assessment of heavy metal pollution sources of groundwater around a lead and zinc plant.

    Science.gov (United States)

    Zamani, Abbas Ali; Yaftian, Mohammad Reza; Parizanganeh, Abdolhossein

    2012-12-17

    The contamination of groundwater by heavy metal ions around a lead and zinc plant has been studied. As a case study groundwater contamination in Bonab Industrial Estate (Zanjan-Iran) for iron, cobalt, nickel, copper, zinc, cadmium and lead content was investigated using differential pulse polarography (DPP). Although, cobalt, copper and zinc were found correspondingly in 47.8%, 100.0%, and 100.0% of the samples, they did not contain these metals above their maximum contaminant levels (MCLs). Cadmium was detected in 65.2% of the samples and 17.4% of them were polluted by this metal. All samples contained detectable levels of lead and iron with 8.7% and 13.0% of the samples higher than their MCLs. Nickel was also found in 78.3% of the samples, out of which 8.7% were polluted. In general, the results revealed the contamination of groundwater sources in the studied zone. The higher health risks are related to lead, nickel, and cadmium ions. Multivariate statistical techniques were applied for interpreting the experimental data and giving a description for the sources. The data analysis showed correlations and similarities between investigated heavy metals and helps to classify these ion groups. Cluster analysis identified five clusters among the studied heavy metals. Cluster 1 consisted of Pb, Cu, and cluster 3 included Cd, Fe; also each of the elements Zn, Co and Ni was located in groups with single member. The same results were obtained by factor analysis. Statistical investigations revealed that anthropogenic factors and notably lead and zinc plant and pedo-geochemical pollution sources are influencing water quality in the studied area.

  17. Ostrich eggshell as calcium source for the synthesis of hydroxyapatite and hydroxyapatite partially substituted with zinc

    International Nuclear Information System (INIS)

    Ferreira, J.R.M.; Louro, L.H.L.; Costa, A.M.; Silva, M.H. Prado da; Campos, J.B. de

    2016-01-01

    In the present study, hydroxyapatite and Zn-substituted hydroxyapatite powders were synthesized using ostrich eggshell as a calcium source. The samples were analyzed by scanning electron microscopy with field emission gun, and X-ray diffraction (XRD) to identify the present phases, and X-ray fluorescence spectroscopy for quantitative chemical analysis of the synthesized and heat treated powders. The Fourier transform infrared spectroscopy technique was used before and after heat treatments at 700, 900 and 1100 °C in order to identify the functional groups present, as an additional technique to the XRD analysis. The results presented in this study represent a promising method for synthesis of hydroxyapatite and hydroxyapatite partially substituted with zinc, since the results showed no undesirable phases or impurities in the produced powders. It was observed that Zn-substituted hydroxyapatite showed higher thermal stability, when compared to pure hydroxyapatite. (author)

  18. Ostrich eggshell as calcium source for the synthesis of hydroxyapatite and hydroxyapatite partially substituted with zinc

    Energy Technology Data Exchange (ETDEWEB)

    Ferreira, J.R.M.; Louro, L.H.L.; Costa, A.M.; Silva, M.H. Prado da [Instituto Militar de Engenharia (IME), Rio de Janeiro, RJ (Brazil); Campos, J.B. de, E-mail: josericardo@r-crio.com, E-mail: louro@ime.eb.br, E-mail: andrea@r-crio.com, E-mail: brantjose@gmail.com, E-mail: marceloprado@ime.eb.br [Universidade do Estado do Rio de Janeiro (UERJ), Rio de Janeiro, RJ (Brazil)

    2016-10-15

    In the present study, hydroxyapatite and Zn-substituted hydroxyapatite powders were synthesized using ostrich eggshell as a calcium source. The samples were analyzed by scanning electron microscopy with field emission gun, and X-ray diffraction (XRD) to identify the present phases, and X-ray fluorescence spectroscopy for quantitative chemical analysis of the synthesized and heat treated powders. The Fourier transform infrared spectroscopy technique was used before and after heat treatments at 700, 900 and 1100 °C in order to identify the functional groups present, as an additional technique to the XRD analysis. The results presented in this study represent a promising method for synthesis of hydroxyapatite and hydroxyapatite partially substituted with zinc, since the results showed no undesirable phases or impurities in the produced powders. It was observed that Zn-substituted hydroxyapatite showed higher thermal stability, when compared to pure hydroxyapatite. (author)

  19. Ostrich eggshell as calcium source for the synthesis of hydroxyapatite and hydroxyapatite partially substituted with zinc

    Directory of Open Access Journals (Sweden)

    J. R. M. Ferreira

    Full Text Available Abstract In the present study, hydroxyapatite and Zn-substituted hydroxyapatite powders were synthesized using ostrich eggshell as a calcium source. The samples were analyzed by scanning electron microscopy with field emission gun, and X-ray diffraction (XRD to identify the present phases, and X-ray fluorescence spectroscopy for quantitative chemical analysis of the synthesized and heat treated powders. The Fourier transform infrared spectroscopy technique was used before and after heat treatments at 700, 900 and 1100 °C in order to identify the functional groups present, as an additional technique to the XRD analysis. The results presented in this study represent a promising method for synthesis of hydroxyapatite and hydroxyapatite partially substituted with zinc, since the results showed no undesirable phases or impurities in the produced powders. It was observed that Zn-substituted hydroxyapatite showed higher thermal stability, when compared to pure hydroxyapatite.

  20. Source Identification of Heavy Metals in Soils Surrounding the Zanjan Zinc Town by Multivariate Statistical Techniques

    Directory of Open Access Journals (Sweden)

    M.A. Delavar

    2016-02-01

    Full Text Available Introduction: The accumulation of heavy metals (HMs in the soil is of increasing concern due to food safety issues, potential health risks, and the detrimental effects on soil ecosystems. HMs may be considered as the most important soil pollutants, because they are not biodegradable and their physical movement through the soil profile is relatively limited. Therefore, root uptake process may provide a big chance for these pollutants to transfer from the surface soil to natural and cultivated plants, which may eventually steer them to human bodies. The general behavior of HMs in the environment, especially their bioavailability in the soil, is influenced by their origin. Hence, source apportionment of HMs may provide some essential information for better management of polluted soils to restrict the HMs entrance to the human food chain. This paper explores the applicability of multivariate statistical techniques in the identification of probable sources that can control the concentration and distribution of selected HMs in the soils surrounding the Zanjan Zinc Specialized Industrial Town (briefly Zinc Town. Materials and Methods: The area under investigation has a size of approximately 4000 ha.It is located around the Zinc Town, Zanjan province. A regular grid sampling pattern with an interval of 500 meters was applied to identify the sample location, and 184 topsoil samples (0-10 cm were collected. The soil samples were air-dried and sieved through a 2 mm polyethylene sieve and then, were digested using HNO3. The total concentrations of zinc (Zn, lead (Pb, cadmium (Cd, Nickel (Ni and copper (Cu in the soil solutions were determined via Atomic Absorption Spectroscopy (AAS. Data were statistically analyzed using the SPSS software version 17.0 for Windows. Correlation Matrix (CM, Principal Component Analyses (PCA and Factor Analyses (FA techniques were performed in order to identify the probable sources of HMs in the studied soils. Results and

  1. Effect of gypsum, pressmud, fulvic acid and zinc sources on yield and zinc uptake by rice crop in a saline-sodic soil

    International Nuclear Information System (INIS)

    Chand, M.

    1980-01-01

    The application of fulvic acid to a saline-sodic soil augmented the solubility of zinc by thousands fold. Zinc fulvate when applied at levels equivalent to that of zinc sulphate was more effective in enhancing diffusion of zinc in the soil. Application of gypsum, zinc sulphate and fulvic acid significantly increased dry matter yield and uptake of zinc by rice crop in a saline-sodic soil. Application of gypsum with pressmud or with fulvic acid and zinc sulphate resulted in significantly higher yield and zinc uptake than in other treatments. (orig.)

  2. Assessment of soil contamination with Cd, Pb and Zn and source identification in the area around the Huludao Zinc Plant

    International Nuclear Information System (INIS)

    Lu, C.A.; Zhang, J.F.; Jiang, H.M.; Yang, J.C.; Zhang, J.T.; Wang, J.Z.; Shan, H.X.

    2010-01-01

    The distribution characteristics of heavy metals (cadmium (Cd), lead (Pb) and zinc (Zn)) in the natural soil profiles around the Huludao Zinc Plant (HZP), an old industrial base in Northeast China, were analyzed. The pollutant source was identified using 210 Pb isotope technique to evaluate the geochemical characteristics of Pb and the historical production records of HZP. The results indicated: dust precipitation from HZP was the primary source of the pollutants. The average deposition rates of Cd, Pb and Zn were 0.33, 1.75, and 30.97 g/m 2 year, respectively at 1 km away after HZP, and 0.0048, 0.035, and 0.20 g/m 2 year, respectively at 10 km away after HZP. There is a risk of secondary pollution to the environment as well as the food chain in seriously polluted areas used for cultivation.

  3. Assessment of soil contamination with Cd, Pb and Zn and source identification in the area around the Huludao Zinc Plant

    Energy Technology Data Exchange (ETDEWEB)

    Lu, C.A.; Zhang, J.F.; Jiang, H.M. [Institute of Agricultural Resources and Regional Planning, Chinese Academy of Agricultural Sciences,100081 Beijing (China); Ministry of Agriculture Key Laboratory of Crop Nutrition and Fertilization, 100081 Beijing (China); Yang, J.C., E-mail: yangjch@263.net [Institute of Agricultural Resources and Regional Planning, Chinese Academy of Agricultural Sciences,100081 Beijing (China) and Ministry of Agriculture Key Laboratory of Crop Nutrition and Fertilization, 100081 Beijing (China); Zhang, J.T.; Wang, J.Z.; Shan, H.X. [Institute of Agricultural Resources and Regional Planning, Chinese Academy of Agricultural Sciences, 100081 Beijing (China); Graduate School of Chinese Academy of Agricultural Sciences,100081 Beijing (China)

    2010-10-15

    The distribution characteristics of heavy metals (cadmium (Cd), lead (Pb) and zinc (Zn)) in the natural soil profiles around the Huludao Zinc Plant (HZP), an old industrial base in Northeast China, were analyzed. The pollutant source was identified using {sup 210}Pb isotope technique to evaluate the geochemical characteristics of Pb and the historical production records of HZP. The results indicated: dust precipitation from HZP was the primary source of the pollutants. The average deposition rates of Cd, Pb and Zn were 0.33, 1.75, and 30.97 g/m{sup 2} year, respectively at 1 km away after HZP, and 0.0048, 0.035, and 0.20 g/m{sup 2} year, respectively at 10 km away after HZP. There is a risk of secondary pollution to the environment as well as the food chain in seriously polluted areas used for cultivation.

  4. Effect of dietary organic zinc sources on growth performance, incidence of diarrhoea, serum and tissue zinc concentrations, and intestinal morphology in growing rabbits

    Directory of Open Access Journals (Sweden)

    J.Y. Yan

    2017-03-01

    Full Text Available This study was conducted to evaluate the effect of dietary organic zinc (Zn sources on growth performance, the incidence of diarrhoea, serum and tissue Zn concentration, and intestinal morphology in growing rabbits. A total of 120 New Zealand White rabbits aged 35 d and with an initial body weight of 755±15 g, were randomly divided into 4 treatment groups for a 49 d feeding trial. Dietary treatments were designed with different Zn supplements as follows: (1 Control group: 80 mg/kg Zn as ZnSO4; (2 ZnLA group: 80 mg/kg Zn as Zn lactate; (3 ZnMet group: 80 mg/kg Zn as Zn methionine; (4 ZnGly group: 80 mg/kg Zn as Zn glycine. The results showed that, when compared with rabbits fed ZnSO4, supplementation with ZnLA improved (P4. Supplementing with ZnLA increased duodenum villi height (681.63 vs. 587.14 μm, P4, except that feeding ZnMet led to higher (P4. The results indicated that supplementation with 80 mg/kg Zn as ZnLA could improve growth performance, increase liver Zn concentration and enhance duodenum morphology, while reducing the incidence of diarrhoea in growing rabbits.

  5. Modulation of ruminal and intestinal fermentation by medicinal plants and zinc from different sources.

    Science.gov (United States)

    Váradyová, Zora; Mravčáková, Dominika; Holodová, Monika; Grešáková, Ľubomira; Pisarčíková, Jana; Barszcz, Marcin; Taciak, Marcin; Tuśnio, Anna; Kišidayová, Svetlana; Čobanová, Klaudia

    2018-06-14

    Two experiments were conducted on sheep to determine the effect of dietary supplementation with zinc and a medicinal plant mixture on haematological parameters and microbial activity in the rumen and large intestine. In Experiment 1, 24 male lambs were randomly divided into four groups: One group was fed an unsupplemented basal diet (control), and three groups were fed a diet supplemented with 70 mg Zn/kg diet in the form of Zn sulphate (ZnSO 4 ), a Zn-chelate of glycine hydrate (Zn-Gly) or a Zn-proteinate (Zn-Pro), for five months. The ruminal content was collected separately from each lamb, and batch cultures of ruminal fluid were incubated in vitro with mixture of medicinal plants (Mix) with different roughage:concentrate ratios (800:200 and 400:600, w/w). Bioactive compounds in Mix were quantified by UPLC/MS/MS. In Experiment 2, four sheep were fed a diet consisting of meadow hay and barley grain (400:600, w/w), with Zn-Gly (70 mg Zn/kg diet), Mix (10% replacement of meadow hay) or Zn-Gly and Mix (Zn-Gly-Mix) as supplements in a Latin square design. Mix decreased total gas (p  0.05). The diets containing medicinal plants and organic zinc thus helped to modulate the characteristics of fermentation in ruminants. © 2018 Blackwell Verlag GmbH.

  6. Use of slurry sampling for the direct determination of zinc in yogurt by high resolution-continuum source flame atomic absorption spectrometry.

    Science.gov (United States)

    Brandao, Geovani C; de Jesus, Raildo M; da Silva, Erik G P; Ferreira, Sergio L C

    2010-06-15

    This paper presents an analytical procedure for the direct determination of zinc in yogurt employing sampling slurry and high resolution-continuum source flame atomic absorption spectrometry (HR-CS FAAS). The step optimization established the experimental conditions of: 2.0molL(-1) hydrochloric acid, a sonication time of 20min and a sample mass of 1.0g for a slurry volume of 25mL. This method allows the determination of zinc with a limit of quantification of 0.32microgg(-1). The precision expressed as relative standard deviation (RSD) were 0.82 and 2.08% for yogurt samples containing zinc concentrations of 4.85 and 2.49microgg(-1), respectively. The accuracy was confirmed by the analysis of a certified reference material of non-fat milk powder furnished by the National Institute of Standard and Technology. The proposed method was applied for the determination of zinc in seven yogurt samples. The zinc content was varied from 2.19 to 4.85microgg(-1). These results agreed with those reported in the literature. The samples were also analyzed after acid digestion and zinc determination by FAAS. No statistical difference was observed between the results obtained by both of the procedures performed.

  7. Fontes e doses de zinco no feijoeiro cultivado em diferentes épocas de semeadura = Sources and doses of zinc in common bean cultivated in different sowing seasons

    Directory of Open Access Journals (Sweden)

    Itamar Rosa Teixeira

    2008-04-01

    Full Text Available Este trabalho teve por objetivo avaliar, em diferentes épocas de cultivo a produção do feijoeiro, submetido à aplicação foliar de fontes e doses de zinco. Foi utilizado o delineamento de blocos casualizados, em esquema fatorial 3 x 2 x 5, com quatro repetições. Os tratamentos envolveram a combinação de três safras de cultivo (inverno, águas e seca, duas fontes de zinco (sulfato e cloreto de zinco e cinco doses de zinco (0, 100, 200, 400 e 800 g ha-1, aplicadas via foliar, aos 25 e 35 dias após emergência da cultura.Na safra de inverno, foram obtidos os maiores rendimentos de grãos e de seus componentes (número de vagens por planta e número de grãos por vagem e teor foliar de zinco, comparativamente, às safras das águas e seca. Não houve efeito da interação entre épocas desemeadura, doses e fontes de zinco. Em solos com teor de Zn próximo de 2,1 mg dm-3, não houve aumento de produtividade para o feijoeiro com a utilização de cloreto ou sulfato de zinco, aplicados via foliar.This work was carried out with the objective of evaluating dry bean yield in different seasons, submitted to foliar application of different sources and doses of zinc. A randomized block design with four replications was used in a 3 x 2 x 5 factorial arrangement. The treatments were formed by the combination of three growing seasons(“fall/winter”, “spring/summer” and “fall/summer” seasons, two zinc sources (zinc sulfate and zinc chloride and five zinc doses (0, 100, 200, 400 and 800 g ha-1, divided into leaf sprayings at 25 and 35 days after emergence (DAE. For the winter crop, a greater increasewas observed in grain yield, its main components (number of pods per plant and number of grains per plant and leaf-zinc content, as compared to the other two seasons. There was no interaction between growing seasons, doses and sources of zinc. In soils with zinc contentof 2.1 mg dm-3, the addition of this nutrient by foliar application did not

  8. Redes sociales y mujeres mayores

    OpenAIRE

    Fernández Campomanes, María

    2012-01-01

    Estudio de carácter cualitativo sobre la influencia de las redes sociales en la mejora de la calidad de vida de las mujeres mayores, que responden al perfil de mujeres de más de 55 años de edad, cuidadoras y cuyo acceso a las TIC no guarda relación con el empleo ni con el ámbito académico.

  9. Effect of Arbuscular Mycorrhizae on zinc nutrition of maize grow in calcareous soil amended with different phosphorus sources

    International Nuclear Information System (INIS)

    Aly, S.S.M.; EL-Ghandour, I. A.

    2001-01-01

    Arbuscular mycorrhizal fungi (AMF) are known to improve P nutrition of plants. The information of AMF effects on corn Zn nutrition under P fertilization in calcareous soil is limited. A greenhouse experiment was carried out using calcareous soil and two P-sources i.e single superphosphate and rock phosphate (with full and one third of recommended dose). to evaluate the ability of AMF on improving Zn nutrition in maize plants. Labelled 65 ZnSo 4 was added at rates of 0.10 and 20 mg Zn Kg -1 soil. Zinc uptake and dry mater of corn shoots were improved as a result of AMF inoculation. The maximum improvement was recorded with super-P fertilizer in combination with 10 or 20 mg Zn Kg -1 soil for non-inoculated and AMF inoculated plants. respectively. The amount of Zn in non-inoculated and AMF inoculated plants. respectively. The amount of ZnSo 4 utilized plant derived from fertilizer.(Zndff) and the percent of ZnSo 4 utilization by corn plants were increased when ZnSo 4 was added at rate of 10 mg Zn Kg -1 soil in the presence of super-P fertilizer. Inoculated plants with AMF had higher Zndff content and U% than non-inoculated ones and the greater Zndff and superphosphate fertilizer. It could be concluded that. AMF is useful method utilization by corn plants grown in calcareous soil

  10. Determination of zinc in ammoniacal ore leaching solutions by X-ray fluorescence spectrometry using a radioactive source

    International Nuclear Information System (INIS)

    Cornejo, N.; Afailal, A.; Garcia, F.; Palacios, M.

    1994-01-01

    A method was developed for the fast determination of zinc in leaching solutions by radioisotope energy-dispersive X-ray fluorescence (EDXRF) spectrometry. The measured intensities were used to develop regression models for estimating the zinc concentration. The primary radiation was provided by the 244 Cm radioisotope. Several experimental parameters including the saturation thickness and detection limit were determined. The advantages of the utilization of conditioning agents with elements of low atomic number such as nitric acid were established. (orig.)

  11. Maltrato institucional a adultos mayores

    Directory of Open Access Journals (Sweden)

    Miriam Rubio Acuña

    Full Text Available El maltrato institucional se refiere a cualquier forma de abuso que ocurre en servicios dirigidos a los ancianos. Esta revisión bibliográfica muestra que el maltrato se presenta con mayor frecuencia en residencias de larga estadía y el tipo más frecuente es la negligencia. Los factores asociados son los que tienen relación con el residente y con el ambiente. Las principales estrategias son invertir recursos sociosanitarios, sensibilizar a la población respecto al maltrato de los ancianos, considerar las necesidades de estos, fortalecer la formación de pregrado de los profesionales de salud en este ámbito y realizar educación continua. El maltrato es un problema social que debe ser abordado de manera integral.

  12. Synoptic monitoring as an approach to discriminating between point and diffuse source contributions to zinc loads in mining impacted catchments.

    Science.gov (United States)

    Banks, V J; Palumbo-Roe, B

    2010-09-01

    One of the global legacies of industrialisation is the environmental impacts of historic mineral exploitation. Recent national initiatives to manage the impacts on ground and surface waters have driven the need to develop better techniques for assessing understanding of the catchment-scale distribution and characterisation of the relative contribution of point and diffuse contaminant sources. The benefits of a detailed, multidisciplinary investigation are highlighted through a case study focused on the Rookhope Burn, a tributary of the River Wear, which falls within a significantly mine impacted area of the North Pennines Orefield, UK. Zinc (Zn) has been identified as the contaminant of concern within this catchment, which is judged by the Environment Agency to be at risk of failing to achieve good water quality status in the context of the Water Framework Directive. The results of synoptic flow monitoring and sampling for chemical determinations of major and trace elements have been used to calculate mass balances of instream and inflow chemical loads in the Rookhope Burn. Despite a dominant impact on the water quality from a mine outburst (especially Zn [1.45 to 2.42 mg/l], Fe [2.18 to 3.97 mg/l], Mn [3.69 to 6.77 mg/l], F [3.99 to 4.80 mg/l] and SO(4) [178 to 299 mg/l]), mass balance calculations combined with geological mapping have facilitated the identification of significant, previously unknown, subsurface contributions of Zn contaminated groundwater (with Zn concentrations in excess of 0.4 to 0.9 mg/l and 0.18 to 0.36 mg/l) to the Burn. The subsurface contributions exhibit spatial correspondence to mine workings with associated mineral veins and adits, or to points of suspected karst groundwater resurgence. These findings reiterate the challenges posed in decision making with respect to remediation, in this case in the context of the management of significant subsurface contributions.

  13. Occurrence of lead, copper, zinc, and arsenic compounds in atmospheric dusts, and the sources of these impurities

    Energy Technology Data Exchange (ETDEWEB)

    Dunn, J T; Bloxam, H C.L.

    1933-06-30

    The authors indicate that the combustion of fossil fuels such as coal for industrial and electrical power causes the deposition of zinc, arsenic, copper, and lead which are then found in the dust and soots of most urban areas. They express the fear that these dusts, if not poisonous, may be expected to be injurious to the health of man, animals, and plants.

  14. Zinc source and concentration altered physiological responses of beef heifers during a combined viral-bacterial respiratory challenge

    Science.gov (United States)

    Three treatments were evaluated in feedlot heifers to determine the effects of zinc supplementation on the immune response to a combined viral-bacterial respiratory disease challenge. Thirty-two beef heifers (255+/-15 kg) were subjected to a 30d period of Zn depletion, then randomly assigned to one ...

  15. Zinc bioavailability in the chick

    International Nuclear Information System (INIS)

    Hempe, J.M.

    1987-01-01

    Methods for assessing zinc bioavailability were evaluated in the chick. A low-zinc chick diet was developed using rehydrated, spray-dried egg white autoclaved at 121 C for 30 min as the primary protein source. The relative bioavailability of zinc from soy flour and beef was determined by whole-body retention of extrinsic 65 Zn, and in slope ratio assays for growth rate and tissue zinc. Compared to zinc carbonate added to an egg white-based diet, all methods gave similar estimates of approximately 100% zinc bioavailability for beef but estimates for soy flour varied widely. The slope ratio assay for growth rate gave the best estimate of zinc bioavailability for soy flour. True absorption, as measured by percent isotope retention from extrinsically labeled soy flour, was 47%

  16. Spectral irradiance of singly and doubly ionized zinc in low-intensity laser-plasma ultraviolet light sources

    Science.gov (United States)

    Szilagyi, John; Parchamy, Homaira; Masnavi, Majid; Richardson, Martin

    2017-01-01

    The absolute spectral irradiances of laser-plasmas produced from planar zinc targets are determined over a wavelength region of 150 to 250 nm. Strong spectral radiation is generated using 60 ns full-width-at-half-maximum, 1.0 μm wavelength laser pulses with incident laser intensities as low as ˜5 × 108 W cm-2. A typical radiation conversion efficiency of ˜2%/2πsr is measured. Numerical calculations using a comprehensive radiation-hydrodynamics model reveal the strong experimental spectra to originate mainly from 3d94s4p-3d94s2, 3d94s4d-3d94s4p, and 3d94p-3d94s, 3d94d-3d94p unresolved-transition arrays in singly and doubly ionized zinc, respectively.

  17. [Evaluation and source analysis of the mercury pollution in soils and vegetables around a large-scale zinc smelting plant].

    Science.gov (United States)

    Liu, Fang; Wang, Shu-Xiao; Wu, Qing-Ru; Lin, Hai

    2013-02-01

    The farming soil and vegetable samples around a large-scale zinc smelter were collected for mercury content analyses, and the single pollution index method with relevant regulations was used to evaluate the pollution status of sampled soils and vegetables. The results indicated that the surface soil and vegetables were polluted with mercury to different extent. Of the soil samples, 78% exceeded the national standard. The mercury concentration in the most severely contaminated area was 29 times higher than the background concentration, reaching the severe pollution degree. The mercury concentration in all vegetable samples exceeded the standard of non-pollution vegetables. Mercury concentration, in the most severely polluted vegetables were 64.5 times of the standard, and averagely the mercury concentration in the vegetable samples was 25.4 times of the standard. For 85% of the vegetable samples, the mercury concentration, of leaves were significantly higher than that of roots, which implies that the mercury in leaves mainly came from the atmosphere. The mercury concentrations in vegetable roots were significantly correlated with that in soils, indicating the mercury in roots was mainly from soil. The mercury emissions from the zinc smelter have obvious impacts on the surrounding soils and vegetables. Key words:zinc smelting; mercury pollution; soil; vegetable; mercury content

  18. Abuso y Maltrato en el Adulto Mayor

    OpenAIRE

    Montero Solano, Gustavo; Vega Chaves, Juan Carlos; Hernández, Gabriel

    2017-01-01

    ResumenExiste incongruencia en las definiciones e interpretación del abuso en adultos mayores. Una definición apropiada y unificada es la dada por la Organización Mundial de la Salud, que indica que el abuso en adulto mayor es cualquier acto aislado o repetitivo o la falta de acción apropiada, ocurrida en cualquier relación de la que se espera confianza, que causa daño o malestar a la persona mayor.Este grupo poblacional es particularmente vulnerable, pues es muy probable que, en algún moment...

  19. The Mayor's Influence in Urban School Desegregation

    Science.gov (United States)

    Dunaway, David King; Beckum, Leonard Charles

    1977-01-01

    There are five primary areas in which mayors exert visible and invisible influence--appointments, decision-making, public statements, coordination of resources, and provision of basic services. (Author/IRT)

  20. Dr Stanislaw Huskowski, Mayor of Wroclaw, Poland

    CERN Multimedia

    Patrice Loïez

    2002-01-01

    Dr Stanislaw Huskowski, Mayor of Wroclaw, Poland visiting the ATLAS magnet assembly hall, building 180. From l to r: Mr Carlo Lamprecht, State Councillor, Dr Stanislaw Huskowski and Dr Peter Jenni, ATLAS Spokesperson

  1. Dr Stanislaw Huskowski, Mayor of Wroclaw, Poland

    CERN Multimedia

    Patrice Loïez

    2002-01-01

    Dr Stanislaw Huskowski, Mayor of Wroclaw, Poland visiting the ATLAS magnet assembly hall, building 180 with Mr Carlo Lamprecht, State Councillor, Dr Stanislaw Huskowski and Dr Peter Jenni, ATLAS Spokesperson

  2. Purification of Zinc Bromide Solution used as shield in hot cells windows for handling of highly radioactive sources

    International Nuclear Information System (INIS)

    Acosta-Leon, C.E.

    1989-10-01

    After some time of use zinc bromide solutions get a yellowish colour and form brownish precipitate, sticking on the walls of the windows that seem to be dirty caused by the effect of the solution penetrating into the packing and epoxy layer of the windows; all these effects cause the corrosive attack over the metallic parts of the window's frame and the same time the clarity and visibility inside the windows become defective. The aim and purpose of the present work was to set up a method intended for the recovery of all the solutions avoiding the use of a new one, the deviation of the original properties was corrected, and the recovered solutions could be used immediately; the experiments were done in the laboratory using a pyrex glass vacuum evaporator flash type, and the results were successful. The sample volume was 1500 1, and the time employed to 100 days. (Author)

  3. Lead Contamination and Source Characterization in Soils Around a Lead-Zinc Smelting Plant in a Near-Urban Environment in Baoji, China.

    Science.gov (United States)

    Deng, Wenbo; Li, Xuxiang; An, Zhisheng; Yang, Liu

    2016-11-01

    Economic reforms in China since 1978 have promoted nationwide socioeconomic advancement but led to a considerable amount of environmental pollution. The distribution and sources of Pb in a typical peri-urban industrial part of Baoji, China, were assessed by determining the Pb contents and isotopic compositions in 52 topsoil samples from the study area. The topsoil samples were polluted averagely with 40.88 mg Pb kg -1 , was 1.86 times higher than the Pb content of local background soil (22.04 mg kg -1 ). Pb isotopic compositions were determined by analyzing samples prepared using total digestion and acid extraction methods. Radiogenic isotopes contributed more to the Pb concentrations in the acid extracts than in the total digests. This was shown by the 207/206 Pb and 208/206 Pb ratios, which were 0.845-0.88 and 2.088-2.128, respectively, in the acid extracts and 0.841-0.875 and 2.086-2.125, respectively, in the total digests. This indicates that anthropogenic sources of Pb could be identified more sensitively in acid extracts than in total digests. The Pb isotope ratios showed that burning coal and smelting ore are the predominant anthropogenic sources of Pb in the study area, i.e., a lead-zinc smelter and a coking plant are major sources of Pb in the study area.

  4. Process development of ITO source/drain electrode for the top-gate indium-gallium-zinc oxide transparent thin-film transistor

    International Nuclear Information System (INIS)

    Cheong, Woo-Seok; Yoon, Young-sun; Shin, Jae-Heon; Hwang, Chi-Sun; Chu, Hye Yong

    2009-01-01

    Indium-tin oxide (ITO) has been widely used as electrodes for LCDs and OLEDs. The applications are expanding to the transparent thin-film transistors (TTFT S ) for the versatile circuits or transparent displays. This paper is related with optimization of ITO source and drain electrode for TTFTs on glass substrates. For example, un-etched ITO remnants, which frequently found in the wet etching process, often originate from unsuitable ITO formation processes. In order to improve them, an ion beam deposition method is introduced, which uses for forming a seed layer before the main ITO deposition. We confirm that ITO films with seed layers are effective to obtain clean and smooth glass surfaces without un-etched ITO remnants, resulting in a good long-run electrical stability of the top-gate indium-gallium-zinc oxide-TTFT.

  5. Diabetes mellitus en adultos mayores costarricenses

    Directory of Open Access Journals (Sweden)

    Rosero-Bixby, Luis

    2007-07-01

    Full Text Available El propósito del artículo es describir la prevalencia de la diabetes mellitus (DM entre los adultos mayores costarricenses. Se analiza la magnitud de la prevalencia, los problemas de medición de la misma, así como los factores asociados con la enfermedad, la enfermedad controlada, y el tener niveles altos de hemoglobina glicosilada (HbA1C entre la población sin diagnóstico previo de DM. Una cuarta parte de los adultos mayores de Costa Rica padecen de DM y cerca de la mitad de los que la padecen, no la tienen controlada. Los factores asociados con la prevalencia de la enfermedad son los usuales destacados por la literatura científica: actividad física, obesidad e historia familiar de DM. Se halla evidencia de un posible problema de acceso diferencial a servicios de control de DM, ya que los adultos mayores que habitan fuera de la gran área metropolitana de San José tienen un riesgo menor de tener controlada su enfermedad. Los adultos mayores sin pensión también tienen un riesgo mayor de tener niveles altos de HbA1C.

  6. Diabetes mellitus en adultos mayores costarricenses

    Directory of Open Access Journals (Sweden)

    Gilbert Brenes-Camacho

    2007-01-01

    Full Text Available El propósito del artículo es describir la prevalencia de la diabetes mellitus (DM entre los adultos mayores costarricenses. Se analiza la magnitud de la prevalencia, los problemas de medición de la misma, así como los factores asociados con la enfermedad, la enfermedad controlada, y el tener niveles altos de hemoglobina glicosilada (HbA1C entre la población sin diagnóstico previo de DM. Una cuarta parte de los adultos mayores de Costa Rica padecen de DM y cerca de la mitad de los que la padecen, no la tienen controlada. Los factores asociados con la prevalencia de la enfermedad son los usuales destacados por la literatura científica: actividad física, obesidad e historia familiar de DM. Se halla evidencia de un posible problema de acceso diferencial a servicios de control de DM, ya que los adultos mayores que habitan fuera de la gran área metropolitana de San José tienen un riesgo menor de tener controlada su enfermedad. Los adultos mayores sin pensión también tienen un riesgo mayor de tener niveles altos de HbA1C.

  7. Subjetividad urbana de los adultos mayores

    OpenAIRE

    Rinaldi, Nicolás Darío

    2008-01-01

    El objetivo general de la investigación consiste en vislumbrar características psicológicas de la subjetividad de los mayores, indagando sobre las modalidades de participación social e interacción subjetiva, con el propósito de reconocer las actividades de vinculación como generadoras de salud psíquica. Nos propusimos echar luz sobre los procesos de elaboración propios de la población mayor, atendiendo a sus representaciones sobre el proceso de envejecimiento, y a las motivaciones y...

  8. Calidad de vida en las personas mayores

    OpenAIRE

    Sanduvete Chaves, Susana

    2004-01-01

    El concepto “calidad de vida” adopta una especial relevancia cuando de personas mayores se trata debido a que, a veces, los servicios que reciben están limitados a nivel asistencial, cubriendo sólo las necesidades básicas en lugar de considerar a la persona como un ser integral. Este trabajo pretende ahondar en esta cuestión. Se realizó un estudio bibliométrico para determinar las características de los programas de atención a personas mayores en la actualidad, especificando puntos débi...

  9. Enfermedades endocrinas en el adulto mayor

    Directory of Open Access Journals (Sweden)

    B. Carlos García, Dr.

    2013-09-01

    A pesar de la heterogeneidad, múltiple co morbilidad y escasa literatura en que se incluye adultos mayores, se proponen algunas recomendaciones para el tratamiento individual del paciente diabético anciano, se revisan las particularidades del diagnóstico y tratamiento del híper e hipotiroidismo, algunas ideas en relación al manejo de la osteoporosis en la mujer mayor y el hombre anciano. Finalmente se aborda la dificultad diagnóstica del hipogonadismo tardío con las indicaciones y contra indicaciones del uso de testosterona.

  10. Maltrato en el adulto mayor institucionalizado

    OpenAIRE

    Eu. Yuly Adams, C.

    2012-01-01

    El maltrato al adulto mayor es un fenómeno presente tanto en nuestro país como en el extranjero, del que no existen estadísticas claras y actualizadas que permitan evaluar su impacto personal ni social. No obstante, en Chile, en el actual escenario de transición demográfica, se presume su protagonismo. En los establecimientos de larga estadía para adultos mayores, el maltrato, es una situación real y recurrente. Si bien en este ámbito específico las estadísticas son aun más escasas, los me...

  11. Organic and inorganic sources of zinc, copper and selenium in diets for dairy cows: intake, blood metabolic profile, milk yield and composition

    Directory of Open Access Journals (Sweden)

    Cristina Simões Cortinhas

    2012-06-01

    Full Text Available The present study was carried out with the objective of evaluating the effects of feeding dairy cows with organic or inorganic sources of zinc (Zn, copper (Cu and selenium (Se on blood concentrations of these minerals, blood metabolic profiles, nutrient intake and milk yield and composition. Nineteen Holstein cows were selected and randomly assigned to two groups for receiving organic (n = 9 or inorganic (n = 10 sources of Zn, Cu and Se from 60 days before the expected date of calving to 80 days of lactation. Samples of feed, orts and milk were collected for analysis. Body condition score (BCS was determined and blood samples were collected for analysis of Zn, Cu and Se concentrations, as well as for metabolic profile. Supplying organic or inorganic sources of Zn, Cu, and Se did not affect dry matter and nutrient intake, blood metabolic profile, milk yield and composition, plasma concentration of these minerals, and BCS or change the BCS in cows from 60 days before the expected date of calving to 80 days of lactation. An effect of time was observed on all feed intake variables, plasma concentrations of Zn and Se, milk yield, milk protein content, BCS and change in BCS.

  12. Templo Mayor, Tenochtitlan - Calendar and Astronomy

    Science.gov (United States)

    Galindo Trejo, Jesús

    The Templo Mayor of Tenochtitlan was the principal symbol of political power and religious control of the Mexicas. Its orientation was chosen according to ancestral calendrical traditions that considered the Mesoamerican calendar as a sacred concern. The solar alignments incorporated into this emblematic building symbolized moments that divided the solar year according to basic properties of the Mesoamerican calendar.

  13. Influence of meat source, pH and production time on zinc protoporphyrin IX formation as natural colouring agent in nitrite-free dry fermented sausages.

    Science.gov (United States)

    De Maere, Hannelore; Chollet, Sylvie; De Brabanter, Jos; Michiels, Chris; Paelinck, Hubert; Fraeye, Ilse

    2018-01-01

    Nitrite is commonly used in meat products due to its plural technological advantages. However, it is controversial because of its detrimental side effects on health. Within the context of nitrite reduction, zinc protoporphyrin IX (Zn(II)PPIX) formation in meat products as natural red colouring agent has been suggested. This investigation presents the evaluation of naturally occurring pigments, namely Zn(II)PPIX, protoporphyrin IX (PPIX) and heme in nitrite-free dry fermented sausages in function of time, meat source (pork, horsemeat and a combination of both meat sources) and pH condition. In function of time, Zn(II)PPIX and PPIX were formed and heme content decreased. Higher pH conditions promoted Zn(II)PPIX and PPIX formation, whereas the influence of pH on heme was less clear. The use of horsemeat also promoted Zn(II)PPIX formation. Moreover, even similar amounts were formed when it was combined with pork. Product redness, however, could not be related to Zn(II)PPIX formation. Copyright © 2017 Elsevier Ltd. All rights reserved.

  14. Application of iron and zinc isotopes to track the sources and mechanisms of metal loading in a mountain watershed

    Energy Technology Data Exchange (ETDEWEB)

    Borrok, David M., E-mail: dborrok@utep.edu [Department of Geological Sciences, University of Texas, El Paso, TX 79968 (United States); Wanty, Richard B.; Ian Ridley, W.; Lamothe, Paul J. [US Geological Survey, Denver Federal Center, Denver, CO 80225 (United States); Kimball, Briant A. [US Geological Survey, 2329 W. Orton Cir., Salt Lake City, UT 84119 (United States); Verplanck, Philip L.; Runkel, Robert L. [US Geological Survey, Denver Federal Center, Denver, CO 80225 (United States)

    2009-07-15

    Here the hydrogeochemical constraints of a tracer dilution study are combined with Fe and Zn isotopic measurements to pinpoint metal loading sources and attenuation mechanisms in an alpine watershed impacted by acid mine drainage. In the tested mountain catchment, {delta}{sup 56}Fe and {delta}{sup 66}Zn isotopic signatures of filtered stream water samples varied by {approx}3.5 per mille and 0.4 per mille, respectively. The inherent differences in the aqueous geochemistry of Fe and Zn provided complimentary isotopic information. For example, variations in {delta}{sup 56}Fe were linked to redox and precipitation reactions occurring in the stream, while changes in {delta}{sup 66}Zn were indicative of conservative mixing of different Zn sources. Fen environments contributed distinctively light dissolved Fe (<-2.0 per mille) and isotopically heavy suspended Fe precipitates to the watershed, while Zn from the fen was isotopically heavy (>+0.4 per mille). Acidic drainage from mine wastes contributed heavier dissolved Fe ({approx}+0.5 per mille) and lighter Zn ({approx}+0.2 per mille) isotopes relative to the fen. Upwelling of Fe-rich groundwater near the mouth of the catchment was the major source of Fe ({delta}{sup 56}Fe {approx} 0 per mille) leaving the watershed in surface flow, while runoff from mining wastes was the major source of Zn. The results suggest that given a strong framework for interpretation, Fe and Zn isotopes are useful tools for identifying and tracking metal sources and attenuation mechanisms in mountain watersheds.

  15. Prevalence of zinc deficiency among primary school children in a ...

    African Journals Online (AJOL)

    Few zinc-rich sources appeared in the diet that was predominantly plant-based. Mean dietary zinc intake was 4.6±2.2 mg/day. The mean value of serum zinc was 66.4±21.5 μg/dL, with 46% of the children having values less than the 70 μg/dL cutoff. The findings indicate a high risk of zinc deficiency and suboptimal zinc ...

  16. Mercury isotope constraints on the source for sediment-hosted lead-zinc deposits in the Changdu area, southwestern China

    Science.gov (United States)

    Xu, Chunxia; Yin, Runsheng; Peng, Jiantang; Hurley, James P.; Lepak, Ryan F.; Gao, Jianfeng; Feng, Xinbin; Hu, Ruizhong; Bi, Xianwu

    2018-03-01

    The Lanuoma and Cuona sediment-hosted Pb-Zn deposits hosted by Upper Triassic limestone and sandstone, respectively, are located in the Changdu area, SW China. Mercury concentrations and Hg isotopic compositions from sulfide minerals and potential source rocks (e.g., the host sedimentary rocks and the metamorphic basement) were investigated to constrain metal sources and mineralization processes. In both deposits, sulfide minerals have higher mercury (Hg) concentrations (0.35 to 1185 ppm) than the metamorphic basement rocks (0.05 to 0.15 ppm) and sedimentary rocks (0.02 to 0.08 ppm). Large variations of mass-dependent fractionation (3.3‰ in δ202Hg) and mass-independent fractionation (0.3‰ in Δ199Hg) of Hg isotopes were observed. Sulfide minerals have Hg isotope signatures that are similar to the hydrothermal altered rocks around the deposit, and similar to the metamorphic basement, but different from barren sedimentary rocks. The variation of Δ199Hg suggests that Hg in sulfides was mainly derived from the underlying metamorphic basement. Mercury isotopes could be a geochemical tracer in understanding metal sources in hydrothermal ore deposits.

  17. New Insights from Zinc and Copper Isotopic Compositions into the Sources of Atmospheric Particulate Matter from Two Major European Cities.

    Science.gov (United States)

    Gonzalez, R Ochoa; Strekopytov, S; Amato, F; Querol, X; Reche, C; Weiss, D

    2016-09-20

    This study reports spatial and temporal variability of Zn and Cu isotopes in atmospheric particulate matter (PM) collected in two major European cities with contrasting atmospheric pollution, Barcelona and London. We demonstrate that nontraditional stable isotopes identify source contributions of Zn and Cu and can play a major role in future air quality studies. In Barcelona, samples of fine PM were collected at street level at sites with variable traffic density. The isotopic signatures ranged between -0.13 ± 0.09 and -0.51 ± 0.05‰ for δ(66)ZnIRMM and between +0.04 ± 0.20 and +0.33 ± 0.15‰ for δ(65)CuAE633. Copper isotope signatures similar to those of Cu sulfides and Cu/Sb ratios within the range typically found in brake wear suggest that nonexhaust emissions from vehicles are dominant. Negative Zn isotopic signatures characteristic for gaseous emissions from smelting and combustion and large enrichments of Zn and Cd suggest contribution from metallurgical industries. In London, samples of coarse PM collected on the top of a building over 18 months display isotope signatures ranging between +0.03 ± 0.04 and +0.49 ± 0.02‰ for δ(66)ZnIRMM and between +0.37 ± 0.17 and +0.97 ± 0.21‰ for δ(65)CuAE633. Heavy Cu isotope signatures (up to +0.97 ± 0.21‰) and higher enrichments and Cu/Sb ratios during winter time indicate important contribution from fossil fuel combustion. The positive δ(66)ZnIRMM signatures are in good agreement with signatures characteristic for ore concentrates used for the production of tires and galvanized materials, suggesting nonexhaust emissions from vehicles as the main source of Zn pollution.

  18. Cirugía bucal mayor ambulatoria

    OpenAIRE

    Carranza Pelegrina, Daniela; Bellorbí Malet, I.; Brescó Salinas, Vicente Miguel; Berini Aytés, Leonardo; Gay Escoda, Cosme

    2004-01-01

    La Cirugía Bucal Mayor Ambulatoria ( CBMA) se define como un modelo organizativo óptimo de asis­tencia quirúrgica multidisci­plinaria que permite tratar a determinados pacientes de una forma segura y efectiva sin necesidad de contar con la cama de hospitalización tradicional. De esta manera se llevan a cabo distintos procedimientos diagnósticos y terapéuticos de mediana complejidad en los que el enfermo regresa a su domici­lio después de un periodo de observación y control. Entre las ventajas...

  19. Diabetes Mellitus en el adulto mayor

    OpenAIRE

    Guerrero-Godínez, Juan; Barragán-Vigil, Ana; Navarro-Macias, Carmen; Murillo-Bonilla, Luis; Uribe-González, Paul; Sánchez-Cruz, Martha

    2017-01-01

    La Diabetes Mellitus, una enfermedad crónica que afecta a todo el mundo siendo nuestro país México, el primer lugar con esta enfermedad, su incidencia aumenta junto con la edad hasta un 20% en personas mayores de 60 años todos ellos susceptibles a síndromes geriátricos, con posibles repercusiones ya sea por falta de control de niveles de glicemia o por un exceso en el control. El objetivo de esta revisión no sistemática es concientizar a la población general de la diabetes mellitus y el conte...

  20. EL SINDROME VESTIBULAR EN EL ADULTO MAYOR

    Directory of Open Access Journals (Sweden)

    Dr. Hamlet Suárez

    2016-11-01

    Full Text Available El vértigo, la inestabilidad y las caídas tienen una incidencia relevante en el adulto mayor, disminuye su calidad de vida y puede ser causa de muerte en esta población. Este artículo describe las presentaciones clínicas y el abordaje de la evaluación de la patología vestibular en este grupo de edad, utilizando diferentes instrumentos para el diagnóstico así como también las reglas generales del tratamiento.

  1. Incontinencia urinaria en el adulto mayor

    Directory of Open Access Journals (Sweden)

    Humberto Chiang, Dr.

    2018-03-01

    Full Text Available Resumen: La incontinencia urinaria (IU es una condición prevalente en la población de adultos mayores, afectando a ambos sexos. Con el envejecimiento de la población será un problema de salud de cada vez mayor relevancia. Su patogenia es compleja y multifactorial, por lo que es fundamental conocer los aspectos fisiopatológicos subyacentes para realizar un adecuado diagnóstico en base a la historia clínica, examen físico y exámenes complementarios solicitados de manera racional. El tratamiento de la IU para adultos mayores no difiere mayormente de los tratamientos utilizados en población más joven. Sin embargo, debe hacerse particular énfasis en identificar comorbilidades, fármacos, trastornos neurológicos y psiquiátricos que puedan estar contribuyendo a la IU. Debe sacarse el máximo provecho del manejo conservador, teniendo consideraciones especiales con el uso de algunos fármacos e indicando cuidadosamente tratamiento quirúrgico a pacientes seleccionados. Summary: Urinary incontinence (UI is a prevalent condition in the population of elderly adults, affecting both sexes. With the aging of the population it will be a health problem of increasing relevance. Its pathogenesis is complex and multifactorial, so it is essential to know the underlying pathophysiological aspects in order to make an adequate diagnosis based on the clinical history, physical examination and complementary tests requested in a rational manner. The treatment of UI for elderly adults does not differ much from the treatment of younger population. However, particular emphasis should be placed on identifying comorbidities, medications, neurological and psychiatric disorders that may be contributing to the UI. Full advantange of conservative management should be taken, having special considerations with the use of some drugs and carefully indicating surgical treatment to selected patients. Palabras clave: Incontinencia urinaria, adulto mayor, envejecimiento

  2. Symptomatic zinc deficiency in experimental zinc deprivation.

    OpenAIRE

    Taylor, C M; Goode, H F; Aggett, P J; Bremner, I; Walker, B E; Kelleher, J

    1992-01-01

    An evaluation of indices of poor zinc status was undertaken in five male subjects in whom dietary zinc intake was reduced from 85 mumol d-1 in an initial phase of the study to 14 mumol d-1. One of the subjects developed features consistent with zinc deficiency after receiving the low zinc diet for 12 days. These features included retroauricular acneform macullo-papular lesions on the face, neck, and shoulders and reductions in plasma zinc, red blood cell zinc, neutrophil zinc and plasma alkal...

  3. Los derechos de las personas mayores

    Directory of Open Access Journals (Sweden)

    Francisco Javier Leturia Arrazola

    2011-12-01

    Full Text Available Este trabajo pretende reflejar el modelo y metodología de inclusión de la perspectiva de los derechos en el modelo de intervención psicosocial orientado a la calidad de vida (Shalock y Verdugo 2006 de las personas mayores, aplicado por los autores y sus equipos en los últimos años, especialmente en Matia Fundazioa, y su utilidad como estrategia preferente de prevención del trato inadecuado. Ha sido becado y publicado por el Defensor del Pueblo del País Vasco, “Ararteko” (2008 en el libro: “Los derechos de las personas mayores y la prevención del mal trato” This work tries to reflect the model and methodology for mainstreaming of rights in the psychosocial intervention model aimed at the quality of life (Shalock and Verdugo, 2006 of the elderly operated by the authors and their teams in recent years Matia Foundation and especially its usefulness as a preferred strategy for the prevention of improper treatment. It was granted and published by the Basque Country Ombudsman “Ararteko” (2008 on the book: “The rights of the elderly and prevention of ill treatment”Download this paper from SSRN: http://ssrn.com/abstract=1963683

  4. Welcome by the Mayor of Valtetsi

    Science.gov (United States)

    Papanikolau, N.

    Welcome by the Mayor of Valtetsi Mr. Chairman Ladies and Gentlemen The municipality of Valtetsi welcomes you and wishes success in your work. Arcadia is both a historical and modern region. Moreover, as a name it remained in the western culture recalling a harmonious and peaceful dream, a lost and desirable situation where the human being lived in balance with nature, a region where the person did not feel yet uprooted. For thousands of years the poetic voices retained vivid this eternal bucolic call of simplicity and accessible happiness. Gazing the starlit sky we will always see Kallisto, the daughter of Lykaona, king of Arcadia and her son Arcadian as they were both transformed in to the constellations Major and Minor Ursus because of the erotic libido of Jupiter and the jealousy of Hera. And we will always remember Centaurus Cheirona, the great schoolteacher of ancient heroes, who was the first to name the constellations according to mythology. Finally we would like to thank the patriot Mr. T. Tzioumi who returns to his beautiful village in Arcadia just like Antaios did. In the geographic place that inspired the arcadian ideal, such activities recall in the limelight Arcadia as was dreamed by Europe. Mr. Chairman, ladies and gentlemen, success in your scientific work. The Municipality of Valtetsi and I myself will be always next to you so that your stay at Arcadia will always remain vivid in your memory. Thank you. Nikos Papanikolaou Mayor of Valtetsi

  5. BWR fuel experience with zinc injection

    International Nuclear Information System (INIS)

    Levin, H.A.; Garcia, S.E.

    1995-01-01

    In 1982 a correlation between low primary recirculation system dose rates in BWR's and the presence of ionic zinc in reactor water was identified. The source of the zinc was primarily from Admiralty brass condensers. Plants with brass condensers are called ''natural zinc'' plants. Brass condensers were also a source of copper that was implicated in crude induced localized corrosion (CILC) fuel failures. In 1986 the first BWR intentionally injected zinc for the benefits of dose rate control. Although zinc alone was never implicated in fuel degradation of failures, a comprehensive fuel surveillance program was initiated to monitor fuel performance. Currently there are 14 plants that are injecting zinc. Six of these plants are also on hydrogen water chemistry. This paper describes the effect on both Zircaloy corrosion and the cruding characteristics as a result of these changes in water chemistry. Fuel rod corrosion was found to be independent of the specific water chemistry of the plants. The corrosion behavior was the same with the additions of zinc alone or zinc plus hydrogen and well within the operating experience for fuel without either of these additions. No change was observed in the amounts of crude deposited on the fuel rods, both for the adherent and loosely held deposits. One of the effects of the zinc addition was the trend to form more of the zinc rich iron spinel in the fuel deposits rather than the hematite deposits that are predominantly formed with non additive water chemistry

  6. A single-source precursor route to anisotropic halogen-doped zinc oxide particles as a promising candidate for new transparent conducting oxide materials

    Directory of Open Access Journals (Sweden)

    Daniela Lehr

    2015-11-01

    Full Text Available Numerous applications in optoelectronics require electrically conducting materials with high optical transparency over the entire visible light range. A solid solution of indium oxide and substantial amounts of tin oxide for electronic doping (ITO is currently the most prominent example for the class of so-called TCOs (transparent conducting oxides. Due to the limited, natural occurrence of indium and its steadily increasing price, it is highly desired to identify materials alternatives containing highly abundant chemical elements. The doping of other metal oxides (e.g., zinc oxide, ZnO is a promising approach, but two problems can be identified. Phase separation might occur at the required high concentration of the doping element, and for successful electronic modification it is mandatory that the introduced heteroelement occupies a defined position in the lattice of the host material. In the case of ZnO, most attention has been attributed so far to n-doping via substitution of Zn2+ by other metals (e.g., Al3+. Here, we present first steps towards n-doped ZnO-based TCO materials via substitution in the anion lattice (O2− versus halogenides. A special approach is presented, using novel single-source precursors containing a potential excerpt of the target lattice 'HalZn·Zn3O3' preorganized on the molecular scale (Hal = I, Br, Cl. We report about the synthesis of the precursors, their transformation into halogene-containing ZnO materials, and finally structural, optical and electronic properties are investigated using a combination of techniques including FT-Raman, low-T photoluminescence, impedance and THz spectroscopies.

  7. Influence of source and drain contacts on the properties of indium-gallium-zinc-oxide thin-film transistors based on amorphous carbon nanofilm as barrier layer.

    Science.gov (United States)

    Luo, Dongxiang; Xu, Hua; Zhao, Mingjie; Li, Min; Xu, Miao; Zou, Jianhua; Tao, Hong; Wang, Lei; Peng, Junbiao

    2015-02-18

    Amorphous indium-gallium-zinc-oxide thin film transistors (α-IGZO TFTs) with damage-free back channel wet-etch (BCE) process were achieved by introducing a carbon nanofilm as a barrier layer. We investigate the effects of different source-and-drain (S/D) materials on TFT performance. We find the TFT with Ti/C S/D electrodes exhibits a superior performance with higher output current, lower threshold voltage, and higher effective electron mobility compared to that of Mo/C S/D electrodes. Transmittance electron microscopy (TEM) and X-ray photoelectron spectroscopy (XPS) are employed to analysis the interfacial interaction between S/D metal/C/α-IGZO layers. The results indicate that the better performance of TFTs with Ti/C electrodes should be attributed to the formations of Ti-C and Ti-O at the Ti/C-contact regions, which lead to a lower contact resistance, whereas Mo film is relatively stable and does not react easily with C nanofilm, resulting in a nonohmic contact behavior between Mo/C and α-IGZO layer. However, both kinds of α-IGZO TFTs show good stability under thermal bias stress, indicating that the inserted C nanofilms could avoid the impact on the α-IGZO channel regions during S/D electrodes formation. Finally, we successfully fabricated a high-definition active-matrix organic lighting emitting diode prototype driven by α-IGZO TFTs with Ti/C electrodes in a pilot line.

  8. El sida y las personas mayores AIDS and the elderly

    Directory of Open Access Journals (Sweden)

    Alica Hanzeliková Pogrányivá

    2006-06-01

    Full Text Available Contraer y transmitir el VIH/sida es un riesgo real en cualquier etapa de la vida del hombre. Esta enfermedad tiene unas connotaciones concretas que pueden influir en diferentes áreas del individuo: psicológica, económica, social, familiar, etc., en cualquier edad, pero aún más si el afectado es una persona mayor. La falta de información sobre la enfermedad y su contagio en la vejez se puede convertir en una amenaza. El motivo de este trabajo es analizar la información y formación que se desprende de la bibliografía respecto a las personas mayores en materia de VIH/sida y proponer actuaciones que abarquen aspectos de prevención, promoción y cuidados.Catching or transmiting AIDS is a risk at any stage of people’s life. This disease has specific connotations that can influence different areas of the individual: psychological, economical, social, family life, etc., at any age but even more if the affected is an old person. The lack of information about the disease and its infection can turn out to be a serious menace. The motivation behind this work is to analize the information and education found in bibliographic sources, regarding old people and their relation to AIDS, and propose actions that embrace prevention, promotion and care aspects.

  9. Morbilidad cardiovascular en el adulto mayor

    Directory of Open Access Journals (Sweden)

    Rita Campillo Motilva

    2001-12-01

    Full Text Available Se realizó un estudio transversal y descriptivo, con el objetivo de definir la morbilidad por enfermedad cardiovascular en pacientes de 60 años y más, en un consultorio médico perteneciente al Policlínico Docente "Dr. Mario Escalona Reguera" del municipio Habana del Este, en el período entre marzo y diciembre del año 2000. Fueron incluidos 69 pacientes, 52 de los cuales (75,3 % presentó algún tipo de enfermedad cardiovascular, y fue el sexo femenino el más afectado (51,9 %. La enfermedad que se encontró con mayor frecuencia fue la hipertensión arterial (43 pacientes para un 62,3 %, observamos que la sistodiastólica (86,1 % y el estadio II (53,5 % fue donde se incluyeron mayor número de individuos. Otras enfermedades encontradas fueron los trastornos electrocardiográficos (33 pacientes para un 47,8 % y valvulopatías (18 pacientes para un 26 %.A cross-sectional and descriptive study was conducted in order to define morbidity due to cardiovascular disease in patients aged 60 and over in a family physician’s office of "Dr. Mario Escalona Reguera" Teaching Polyclinic, in Habana del Este municipality, from March to December, 2000. 69 patients were included. 52 of them (75.3 % had some type of cardiovascular disease and females were the most affected (51.9 %. Arterial hypertension was the most commonly found disease (43 patients for 62.3 %. Most of the individuals were included in the systodiastolic (86.1 % and in stage II (53.5 %. Electrocardiographic disorders (33 patients for 47.8 % and valvulopathies (18 patients for 26 % were other of the diseases detected.

  10. Zinc Signals and Immunity.

    Science.gov (United States)

    Maywald, Martina; Wessels, Inga; Rink, Lothar

    2017-10-24

    Zinc homeostasis is crucial for an adequate function of the immune system. Zinc deficiency as well as zinc excess result in severe disturbances in immune cell numbers and activities, which can result in increased susceptibility to infections and development of especially inflammatory diseases. This review focuses on the role of zinc in regulating intracellular signaling pathways in innate as well as adaptive immune cells. Main underlying molecular mechanisms and targets affected by altered zinc homeostasis, including kinases, caspases, phosphatases, and phosphodiesterases, will be highlighted in this article. In addition, the interplay of zinc homeostasis and the redox metabolism in affecting intracellular signaling will be emphasized. Key signaling pathways will be described in detail for the different cell types of the immune system. In this, effects of fast zinc flux, taking place within a few seconds to minutes will be distinguish from slower types of zinc signals, also designated as "zinc waves", and late homeostatic zinc signals regarding prolonged changes in intracellular zinc.

  11. Salud mental en el adulto mayor: trastornos neurocognitivos mayores, afectivos y del sueño

    Directory of Open Access Journals (Sweden)

    Tania Tello-Rodríguez

    Full Text Available RESUMEN Existen numerosos factores biológicos, psicológicos y sociales con impacto más o menos prominente en la salud mental de las personas adultas mayores. Aparte de componentes derivados de los procesos normales de envejecimiento o de la coocurrencia de enfermedades médicas diversas, eventos como la muerte de un ser querido, la jubilación o la discapacidad, contribuyen significativamente a una variedad de problemas mentales o emocionales en esta fase del ciclo vital. Los problemas más frecuentes afectan las esferas neurocognitiva, afectiva y onírica. Los trastornos neurocognitivos mayores reducen el rendimiento general del paciente y generan con ello exigentes necesidades de dependencia y cuidado cercano. Los trastornos afectivos pueden acentuarse por falta de apoyo familiar y disminución marcada de interacciones sociales que pueden dar lugar a un significativo aislamiento con conducta suicida resultante. La mayor frecuencia de trastornos del sueño como insomnio, somnolencia diurna y trastornos específicos como apnea obstructiva alteran significativamente la calidad de vida de esta población.

  12. El Maestro Universitario: Un Mayor de Edad

    Directory of Open Access Journals (Sweden)

    Néstor Alonso Sánchez Cardozo

    2015-10-01

    Full Text Available Este artículo analiza los cambios asociados a la adquisición de la “mayoría de edad” por parte del docente universitario. En tal sentido, diversos estudios desarrollados en los últimos tiempos le permiten al autor afirmar tal enunciado. En efecto, la reflexión plantea la existencia de rupturas epistemológicas frente al paradigma tradicional de formación del docente, lo que nos lleva a reposicionar su conceptualización como un proceso de construcción social, que se reconstruye a partir de las políticas implementadas para el desarrollo de la universidad.  SummaryThis article analyzes the changes associated to the acquisition of “adulthood” by part of university teachers. In such sense, diverse studies developed lately allow the author to affirm such statement. In fact, this reflection states the existence of epistemological breaks facing the traditional paradigm of teacher training. This make us redefine its conceptualization as a process of social construction, which is rebuilt from the policies implemented for the university development.

  13. Arctic oil exploration Former mayor says yes

    Energy Technology Data Exchange (ETDEWEB)

    Kaleak, J. Sr.

    Alaska's coastal plain can sustain both wilderness values and oil production, says Jeslie Kaleak, Sr., former mayor of North Slope Borough in Borrow, Alaska. Kaleak is director is Barrow Operations for North Slope Regional Corporation. Nevertheless, Kaleak contends, [open quotes]the people in the Lower 48 want to keep us from developing this land because of some preconceived notion of the land as a wilderness paradise.[close quotes] Kaleak insists that the Inupiaq people, American Indians inhabiting the Northern Slope region, have provided for their families for thousands of years by turning to the natural environment. Their decision to support oil development is no different. Kaleak contends that the mineral and oil wealth of the North Slope has allowed the Inupiaq people to improve their standard of living drastically. Oil development on the coastal plain, Kaleak contends, could provide similar economic benefits. [open quotes]We cannot define our lives by the vision of distant people who view the North Slope as one great outdoor Disneyland where...all resources remain off limits to us,[close quotes] Kaleak concludes.

  14. Eritema multiforme mayor desencadenado por antimicrobianos

    Directory of Open Access Journals (Sweden)

    Ronaldo de Carvalho Raimundo

    2010-03-01

    Full Text Available El eritema multiforme, aparece como una enfermedad sistémica con la participación de la piel y las membranas mucosas en relación con varios factores como las infecciones bacterianas o virales, y en particular la administración de drogas, analgésicos y antibióticos en general. Se presenta un paciente masculino de 29 años de edad con eritema multiforme mayor desencadenado por antimicrobianos con la aparición de lesiones vesiculares-bulloso-ulcerosas en las regiones de los labios, encías, la lengua y la mucosa genital en tratamiento de una infección del tracto urinario con norfloxacino 400 mg por una semana. Fue realizado un tratamiento de soporte con el uso de colutorios para la higienización bucal y pomada a base de corticoide para protección de las úlceras, antihistamínicos y orientación nutricional de dieta líquida hipercalórica e hiperproteica. Este síndrome está caracterizado como un proceso eruptivo buloso agudo que compromete la calidad de vida del paciente y no hay pruebas de laboratorio específicas por lo que su diagnóstico debe estar basado en la revisión minuciosa de la anamnesis y en los hallazgos clínicos.

  15. Tumores de glándulas salivales mayores

    OpenAIRE

    Martin Berdasco, Franscisco; Meleg de Smith, Suzanne

    2011-01-01

    Se estudiaron 174 tumores de las glándulas salivales mayores recogidos de los archivos del Departamento de Patología del Instituto Nacional de Cancerologia en un período de 15 años (1954-1968). Hasta donde sabemos, esta serie representa el número mayor de casos de tumores de glándulas salivales mayores publicado en nuestro medio.

  16. Effect of temperature on the optical and structural properties of hexadecylamine capped ZnS nanoparticles using Zinc(II) N-ethyl-N-phenyldithiocarbamate as single source precursor

    Energy Technology Data Exchange (ETDEWEB)

    Onwudiwe, Damian C., E-mail: dconwudiwe@webmail.co.za [Chemical Resource Beneficiation, North-West University, Private Bag X6001, Potchefstroom 2520 (South Africa); Strydom, Christien [Chemical Resource Beneficiation, North-West University, Private Bag X6001, Potchefstroom 2520 (South Africa); Oluwafemi, Oluwatobi S., E-mail: oluwafemi.oluwatobi@gmail.com [Department of Chemistry and Chemical Technology, Walter Sisulu University, Mthatha Campus, Private Bag X1, Mthatha (South Africa); Songca, Sandile P. [Faculty of Science, Engineering and Technology, Walter Sisulu University, P.O. Box 19712, Tecoma, East London (South Africa)

    2012-12-15

    Graphical abstract: Display Omitted Highlights: ► HDA-capped ZnS nanoparticles were synthesized via thermolysis of a single source precursor. ► Zinc(II) N-ethyl-N-phenyldithiocarbamate was used as the single source precursor. ► The growth temperature was varied to study the optical properties of the nanocrystals. ► Change in growth temperature affects the structural properties of the ZnS nanoparticles. ► Hexagonal wurtzite phase was obtained at lower temperatures while cubic sphalerite phase was obtained at higher growth temperatures. -- Abstract: Reported in this work is the synthesis of HDA (hexadecylamine)-capped ZnS nanoparticles by a single source route using Zinc(II) N-ethyl-N-phenyldithiocarbamate as a precursor. By varying the growth temperature, the temporal evolution of the optical properties and morphology of the nanocrystals were investigated. The as-synthesized nanoparticles were characterized using UV–vis absorption and photoluminescence (PL) spectroscopy, transmission electron microscopy (TEM), high resolution transmission electron microscopy (HRTEM) and X-ray diffraction (XRD). All the particles exhibited quantum confinement in their optical properties with band edge emission at the early stage of the reaction. The XRD showed transition from hexagonal wurtzite phase to cubic sphalerite phase as the growth temperature increases. The TEM image showed that the particles are small and spherical in shape while the HRTEM image confirmed the crystalline nature of the material.

  17. Production of zinc pellets

    Science.gov (United States)

    Cooper, J.F.

    1996-11-26

    Uniform zinc pellets are formed for use in batteries having a stationary or moving slurry zinc particle electrode. The process involves the cathodic deposition of zinc in a finely divided morphology from battery reaction product onto a non-adhering electrode substrate. The mossy zinc is removed from the electrode substrate by the action of gravity, entrainment in a flowing electrolyte, or by mechanical action. The finely divided zinc particles are collected and pressed into pellets by a mechanical device such as an extruder, a roller and chopper, or a punch and die. The pure zinc pellets are returned to the zinc battery in a pumped slurry and have uniform size, density and reactivity. Applications include zinc-air fuel batteries, zinc-ferricyanide storage batteries, and zinc-nickel-oxide secondary batteries. 6 figs.

  18. Dietary phytate, zinc and hidden zinc deficiency.

    Science.gov (United States)

    Sandstead, Harold H; Freeland-Graves, Jeanne H

    2014-10-01

    Epidemiological data suggest at least one in five humans are at risk of zinc deficiency. This is in large part because the phytate in cereals and legumes has not been removed during food preparation. Phytate, a potent indigestible ligand for zinc prevents it's absorption. Without knowledge of the frequency of consumption of foods rich in phytate, and foods rich in bioavailable zinc, the recognition of zinc deficiency early in the illness may be difficult. Plasma zinc is insensitive to early zinc deficiency. Serum ferritin concentration≤20μg/L is a potential indirect biomarker. Early effects of zinc deficiency are chemical, functional and may be "hidden". The clinical problem is illustrated by 2 studies that involved US Mexican-American children, and US premenopausal women. The children were consuming home diets that included traditional foods high in phytate. The premenopausal women were not eating red meat on a regular basis, and their consumption of phytate was mainly from bran breakfast cereals. In both studies the presence of zinc deficiency was proven by functional responses to controlled zinc treatment. In the children lean-mass, reasoning, and immunity were significantly affected. In the women memory, reasoning, and eye-hand coordination were significantly affected. A screening self-administered food frequency questionnaire for office might help caregiver's identify patients at risk of zinc deficiency. Copyright © 2014 Elsevier GmbH. All rights reserved.

  19. PREPARATION OF ZINC ENRICHED YEAST (SACCHAROMYCES CEREVISIAE BY CULTIVATION WITH DIFFERENT ZINC SALTS

    Directory of Open Access Journals (Sweden)

    Ľuboš Harangozo

    2012-02-01

    Full Text Available The yeast Saccharomyces cerevisiae is the best known microorganism and therefore widely used in many branches of industry. This study aims to investigate the accumulation of three inorganic zinc salts. Our research presents the ability of this yeast to absorb zinc from liquid medium and such enriched biomass use as a potential source of microelements in animal and/or human nutrition. It was found that the addition of different zinc forms, i.e. zinc nitrate, zinc sulphate and zinc chloride in fixed concentrations of 0, 25, 50 and 100 mg.100 ml-1 did not affect the amount of dry yeast biomass yielded, i.e. 1.0 – 1.2 g of yeast cells from 100 ml of cultivation medium, while higher presence of zinc solutions caused significantly lower yield of yeast biomass. The highest amount of zinc in yeast cells was achieved when added in the form of zinc nitrate in concentration of 200 mg.100 ml-1 YPD medium. The increment of intracellular zinc was up to 18.5 mg.g-1 of yeast biomass.

  20. Political Leadership in Issue Networks : How Mayors Rule Their World?

    NARCIS (Netherlands)

    Denters, Sebastianus A.H.; Steyvers, Kristof; Klok, Pieter-Jan; Cermak, Daniel; Heinelt, Hubert; Magnier, Annick; Cabria, Marcello; Reynaert, Herwig

    2018-01-01

    In his controversial book If Mayors Ruled the World, US political theorist Benjamin Barber argued that mayors can and do play a major role in solving today’s grand societal challenges in domains like social inclusion and poverty, climate change and sustainability and safety and public order. It is

  1. ¿Las personas mayores son testigos fiables?

    Directory of Open Access Journals (Sweden)

    Alaitz Aizpurua

    2011-07-01

    Full Text Available Imaginemos que en un juicio llaman a declarar como víctima o testigo a una persona mayor, situación cada vez más probable debido al envejecimiento de la población. En este artículo analizamos las diferencias entre jóvenes y mayores en la exactitud y fiabilidad del testimonio. Los mayores recuerdan con precisión aspectos representativos o la esencia del acontecimiento, pero recuerdan peor que los jóvenes detalles específicos. En pruebas de reconocimiento que requieren discriminar o verificar los hechos, las personas mayores tienen más falsas memorias y las experimentan como recuerdos verídicos en mayor medida que los jóvenes, produciendo así testimonios menos fiables.

  2. BWR zinc addition Sourcebook

    International Nuclear Information System (INIS)

    Garcia, Susan E.; Giannelli, Joseph F.; Jarvis, Alfred J.

    2014-01-01

    Boiling Water Reactors (BWRs) have been injecting zinc into the primary coolant via the reactor feedwater system for over 25 years for the purpose of controlling primary system radiation fields. The BWR zinc injection process has evolved since the initial application at the Hope Creek Nuclear Station in 1986. Key transitions were from the original natural zinc oxide (NZO) to depleted zinc oxide (DZO), and from active zinc injection of a powdered zinc oxide slurry (pumped systems) to passive injection systems (zinc pellet beds). Zinc addition has continued through various chemistry regimes changes, from normal water chemistry (NWC) to hydrogen water chemistry (HWC) and HWC with noble metals (NobleChem™) for mitigation of intergranular stress corrosion cracking (IGSCC) of reactor internals and primary system piping. While past reports published by the Electric Power Research Institute (EPRI) document specific industry experience related to these topics, the Zinc Sourcebook was prepared to consolidate all of the experience gained over the past 25 years. The Zinc Sourcebook will benefit experienced BWR Chemistry, Operations, Radiation Protection and Engineering personnel as well as new people entering the nuclear power industry. While all North American BWRs implement feedwater zinc injection, a number of other BWRs do not inject zinc. This Sourcebook will also be a valuable resource to plants considering the benefits of zinc addition process implementation, and to gain insights on industry experience related to zinc process control and best practices. This paper presents some of the highlights from the Sourcebook. (author)

  3. Method of capturing or trapping zinc using zinc getter materials

    Science.gov (United States)

    Hunyadi Murph, Simona E.; Korinko, Paul S.

    2017-07-11

    A method of trapping or capturing zinc is disclosed. In particular, the method comprises a step of contacting a zinc vapor with a zinc getter material. The zinc getter material comprises nanoparticles and a metal substrate.

  4. Zinc at glutamatergic synapses.

    Science.gov (United States)

    Paoletti, P; Vergnano, A M; Barbour, B; Casado, M

    2009-01-12

    It has long been known that the mammalian forebrain contains a subset of glutamatergic neurons that sequester zinc in their synaptic vesicles. This zinc may be released into the synaptic cleft upon neuronal activity. Extracellular zinc has the potential to interact with and modulate many different synaptic targets, including glutamate receptors and transporters. Among these targets, NMDA receptors appear particularly interesting because certain NMDA receptor subtypes (those containing the NR2A subunit) contain allosteric sites exquisitely sensitive to extracellular zinc. The existence of these high-affinity zinc binding sites raises the possibility that zinc may act both in a phasic and tonic mode. Changes in zinc concentration and subcellular zinc distribution have also been described in several pathological conditions linked to glutamatergic transmission dysfunctions. However, despite intense investigation, the functional significance of vesicular zinc remains largely a mystery. In this review, we present the anatomy and the physiology of the glutamatergic zinc-containing synapse. Particular emphasis is put on the molecular and cellular mechanisms underlying the putative roles of zinc as a messenger involved in excitatory synaptic transmission and plasticity. We also highlight the many controversial issues and unanswered questions. Finally, we present and compare two widely used zinc chelators, CaEDTA and tricine, and show why tricine should be preferred to CaEDTA when studying fast transient zinc elevations as may occur during synaptic activity.

  5. The effect of a moderate zinc deficiency and dietary fat source on the activity and expression of the Δ(3)Δ (2)-enoyl-CoA isomerase in the liver of growing rats.

    Science.gov (United States)

    Justus, Jennifer; Weigand, Edgar

    2014-06-01

    Auxiliary enzymes participate in β-oxidation of unsaturated fatty acids. The objective of the study was to investigate the impact of a moderate zinc deficiency and a high intake of polyunsaturated fat on Δ(3)Δ(2)-enoyl-CoA isomerase (ECI) in the liver and other tissues. Five groups of eight weanling rats each were fed moderately zinc-deficient (ZD) or zinc-adequate (ZA) semisynthetic diets (7 or 50 mg Zn/kg) enriched with 22 % cocoa butter (CB) or 22 % safflower oil (SO) for 4 weeks: (1) ZD-CB, fed free choice; (2) ZA-CBR, ZA-CB diet fed in equivalent amounts consumed by the ZD-CB group; (3) ZD-SO, fed free choice; (4) ZA-SOR, ZA-SO diet fed in equivalent amounts consumed by the ZD-SO group; and (5) ZA-SO, fed free choice. Growth and Zn status markers were markedly reduced in the ZD groups. ECI activity in the liver of the animals fed the ZD- and ZA-SO diets were significantly higher (approximately 2- and 3-fold, respectively) as compared with the CB-fed animals, whereas activities in extrahepatic tissues (kidneys, heart, skeletal muscle, testes, adipose tissue) were not altered by dietary treatments. Transcript levels of the mitochondrial Eci gene in the liver did not significantly differ between ZD and ZA rats, but were 1.6-fold higher in the ZA-SO- than in the ZD-CB-fed animals (P safflower oil as a source high in linoleic acid induce markedly increased hepatic ECI activities and that a moderate Zn deficiency does not affect transcription of the mitochondrial Eci gene in the liver.

  6. Factores asociados al maltrato del adulto mayor de Antioquia, 2012

    OpenAIRE

    Sara M. Cano; María O. Garzón; Ángela M. Segura; Doris Cardona

    2015-01-01

    Objetivo: determinar los factores asociados al maltrato del adulto mayor del departamento de Antioquia en el año 2012. Metodología: mediante estudio descriptivo transversal, se caracterizaron los factores demográficos, económicos y de salud mental de la población adulta mayor de Antioquia para el año 2012, con el fin de aportar al análisis de la situación de salud y condiciones de vida del adulto mayor. El estudio se basó en los resultados del instrumento aplicado por la Universidad ces a 4.2...

  7. Zinc oxide overdose

    Science.gov (United States)

    Zinc oxide is an ingredient in many products. Some of these are certain creams and ointments used ... prevent or treat minor skin burns and irritation. Zinc oxide overdose occurs when someone eats one of ...

  8. Zinc and gastrointestinal disease

    Institute of Scientific and Technical Information of China (English)

    Sonja; Skrovanek; Katherine; DiGuilio; Robert; Bailey; William; Huntington; Ryan; Urbas; Barani; Mayilvaganan; Giancarlo; Mercogliano; James; M; Mullin

    2014-01-01

    This review is a current summary of the role that both zinc deficiency and zinc supplementation can play in the etiology and therapy of a wide range of gastrointestinal diseases. The recent literature describing zinc action on gastrointestinal epithelial tight junctions and epithelial barrier function is described. Zinc enhancement of gastrointestinal epithelial barrier function may figure prominently in its potential therapeutic action in several gastrointestinal diseases.

  9. Black Perceptions of the Mayor: An Empirical Test.

    Science.gov (United States)

    Foster, Lorn S.

    1978-01-01

    During the past ten years Blacks have increased their participation in the urban political process. In a few urban areas, such as Newark and Detroit, Blacks constitute an electoral majority and have elected Black mayors. (Author/RLV)

  10. Nivel de autotrascendencia en un grupo de adultos mayores mexicanos

    Directory of Open Access Journals (Sweden)

    Raúl Fernando Guerrero Castañeda

    2017-01-01

    Full Text Available Introducción: La autotrascendencia es una expansión multidimensional personal, una conexión con los demás, el entorno y/o una entidad superior, está relacionada con el bienestar personal del adulto mayor. Objetivo: Determinar el nivel de autotrascendencia de un grupo de adultos mayores mexicanos. Materiales y Métodos: Estudio descriptivo de corte transversal; realizado en tres centros gerontológicos de Celaya, Guanajuato, México, muestra probabilística aleatoria n=118. Se incluyeron adultos mayores que acudían a los centros gerontológicos, hombres y mujeres, ≥ 60 años. Se utilizó la Escala de Autotrascendencia en español con valor resultante entre 15 y 60 (mayor puntaje = mayor autotrascendencia. Se realizó prueba piloto con 40 adultos mayores con Alpha de Cronbach de 0.80. Análisis estadístico descriptivo para variables categóricas (frecuencias y porcentajes, para variables numéricas: medidas de tendencia central y dispersión. Resultados: Media de Autotrascendencia fue 51.36. Se identificaron con “Encontrando significado en mis creencias espirituales” (85.6% y “Disfrutando mi ritmo de vida” (81.4%; hubo diferencia estadísticamente significativa en la media de Autotrascendencia (p˂0.05 por sexo, siendo mayor el nivel en las mujeres. No hubo diferencia entre grupos de edad. Discusión y Conclusiones: La media de autotrascendencia refleja un nivel alto, en comparación con otros estudios y se reportó entre 75-84 años una media mayor. Los adultos mayores se identifican con características como la religión y el disfrute de la vida. La Escala de Autotrascendencia se puede usar en adultos mayores mexicanos ya que demostró un buen nivel de consistencia interna. Cómo citar este artículo: Guerrero RF, Lara R. Nivel de autotrascendencia en un grupo de adultos mayores mexicanos. Rev Cuid. 2017; 8(1: 1476-87. http://dx.doi.org/10.15649/cuidarte.v8i1.354

  11. Significado de ser docente para el adulto mayor sanfernandino

    OpenAIRE

    Martina, Martha; Santos, Gladys; Lema, Julia

    2013-01-01

    Objetivos: Comprender el significado de ser docente para el adulto mayor de la Facultad de Medicina de San Marcos y describir las motivaciones que determinan, de alguna forma, su decisión de postergar su retiro, no obstante haber cumplido con los requisitos legales para la jubilación. Diseño: Estudio de caso cualitativo. Institución: Facultad de Medicina, UNMSM. Participantes: Docentes adulto mayores de la Facultad de Medicina. Intervenciones: Entrevista a profundidad. Principales medidas de ...

  12. Prevalencia de anemia y factores asociados en adultos mayores peruanos

    Directory of Open Access Journals (Sweden)

    Carolina Tarqui-Mamani

    Full Text Available Objetivos. Determinar la prevalencia de anemia y factores asociados en los adultos mayores del Perú. Materiales y métodos. Se realizó un estudio transversal durante el año 2011. El muestreo fue probabilístico, estratificado y multietápico. La muestra de viviendas fue 5792 y se incluyó 2172 adultos mayores. Se definió anemia como hemoglobina 23 a 80 años (OR 2,1; IC 95%: 1,4-3,0 y la delgadez (OR 1,7; IC 95%:1,2-2,3 se asociaron con la anemia. Los departamentos con mayor prevalencia de anemia fueron Ayacucho (57,6%, Ancash (40,1%, Lambayeque (37,7% y Apurímac (36,9%. Conclusiones. Aproximadamente la cuarta parte de los adultos mayores tuvieron anemia, siendo más predominante en los analfabetos, procedentes de áreas rurales y pobres. La mayor edad y la delgadez se asocian con la presencia de anemia en los adultos mayores peruanos

  13. Zinc in human serum

    International Nuclear Information System (INIS)

    Kiilerich, S.

    1987-01-01

    The zinc ion is essential for the living organism. Many pathological conditions have been described as a consequence of zinc deficiency. As zinc constitutes less than 0.01 per cent of the body weight, it conventionally belongs to the group of trace elements. The method of atomic absorption spectrophotometry is used to measure the concentration of zinc in serum and urine from healthy persons. The assumptions of the method is discussed. The importance of proteinbinding, diet and the diurnal variation of serum zinc concentration is presented. Serum versus plasma zinc concentration is discussed. Reference serum zinc values from 104 normal subjects are given. Zinc in serum is almost entirely bound to proteins. A preliminary model for the estimation of the distribution of zinc between serum albumin and α 2 -macroglobulin is set up. This estimate has been examined by an ultracentrufugation method. The binding of zinc to a α 2 -macroglobulin in normal persons is appoximately 7 per cent, in patients with cirrhosis of the liver of alcoholic origin approximately 6 per cent, in patients with insulin dependent diabetes mellitus approximately 5 per cent, and in patients with chronic renal failure approximately 2 per cent. It is concluded, therefore, that for clinical purposes it is sufficient to use the concentration of total serum zinc corrected for the concentration of serum albumin. (author)

  14. Efficiency of zinc incorporated urea on wheat in two Bihar soils

    International Nuclear Information System (INIS)

    Mutatkar, V.K.; Parik, B.L.; Sahay, R.N.; Dhua, S.P.

    1977-01-01

    The effect of zinc application as zinc sulphate alone and incorporated with urea (granulated zincated urea) on wheat was compared in pot culture study using 62 Zn as tracer. Two typical alluvial calcareous soils from Samastipur and Dholi, Bihar were used for the study. The crop responded to zinc application and the increase in dry matter yield was significant. Total uptake and concentration of zinc in plant, zinc percent derived from fertilizer source and its utilization, were non-significant between the two sources, although there was a significant differences in all the parameters because of the higher dose of zinc application. Relative efficiency of zincated urea was slightly higher in Samastipur soil having low available zinc and similar to zinc sulphate in Dholi soil containing medium amount of available zinc. The field experiment carried out at Sindri (Bihar) confirmed the above finding. (author)

  15. Bioavailability of Zinc in Wistar Rats Fed with Rice Fortified with Zinc Oxide

    Science.gov (United States)

    Della Lucia, Ceres Mattos; Santos, Laura Luiza Menezes; Rodrigues, Kellen Cristina da Cruz; Rodrigues, Vivian Cristina da Cruz; Martino, Hércia Stampini Duarte; Pinheiro Sant’Ana, Helena Maria

    2014-01-01

    The study of zinc bioavailability in foods is important because this mineral intake does not meet the recommended doses for some population groups. Also, the presence of dietary factors that reduce zinc absorption contributes to its deficiency. Rice fortified with micronutrients (Ultra Rice®) is a viable alternative for fortification since this cereal is already inserted into the population habit. The aim of this study was to evaluate the bioavailability of zinc (Zn) in rice fortified with zinc oxide. During 42 days, rats were divided into four groups and fed with diets containing two different sources of Zn (test diet: UR® fortified with zinc oxide, or control diet: zinc carbonate (ZnCO3)), supplying 50% or 100%, respectively, of the recommendations of this mineral for animals. Weight gain, food intake, feed efficiency ratio, weight, thickness and length of femur; retention of zinc, calcium (Ca) and magnesium (Mg) in the femur and the concentrations of Zn in femur, plasma and erythrocytes were evaluated. Control diet showed higher weight gain, feed efficiency ratio, retention of Zn and Zn concentration in the femur (p 0.05) for dietary intake, length and thickness of the femur, erythrocyte and plasmatic Zn between groups. Although rice fortified with zinc oxide showed a lower bioavailability compared to ZnCO3, this food can be a viable alternative to be used as a vehicle for fortification. PMID:24932657

  16. The relative efficiency of zinc carriers on growth and zinc nutrition of corn

    International Nuclear Information System (INIS)

    Prasad, B.; Sinha, K.

    1981-01-01

    A comparison of different zinc carriers showed that application of Zn-DTPA, Zn-EDTA, Zn-fulvate and ZnSO 4 significantly increased the dry matter yield and zinc uptake by corn over the control treatment where no zinc was applied. The chelates in particular enhanced to a greater extent the uptake of both native and applied sources than that observed with ZnSO 4 as the zinc carrier. Both the dry matter yield and zinc uptake by corn showed a positive and significant relationship with self-diffusion coefficient of zinc showing thereby that diffusion contributed mainly the supply of Zn from the ambient soil matrix to plant roots. The effectiveness of the chelates varied depending on their capacity to retain Zn in a soluble form in the soil solution. It is evident that zinc nutrition of plants in alkaline and calcareous soils can be more effectively regulated by both synthetic and natural chelates or organic manures which contain substantial amount of complexed zinc. (orig.)

  17. A comparative study of zinc protoporphyrin IX-forming properties of animal by-products as sources for improving the color of meat products.

    Science.gov (United States)

    Wakamatsu, Jun-ichi; Murakami, Naoko; Nishimura, Takanori

    2015-05-01

    The objective of this study was to obtain fundamental data for improving the color of meat products by using animal by-products. We investigated zinc protoporphyrin IX (ZnPP)-forming properties of various internal organs from pigs and chickens. ZnPP was formed in the liver, heart and kidney, whereas the porcine spleen and bile, which are involved in the metabolism of heme, did not have ZnPP-forming properties. The optimum pH values were different among the internal organs and the ZnPP-forming properties of porcine organs were better than those of chicken organs. The porcine liver showed the greatest ZnPP-forming properties among all of the internal organs investigated in this study. The optimum pH value for ZnPP formation in the liver was lower than that of skeletal muscle. Oxygen did not inhibit the formation of ZnPP in the liver, unlike in skeletal muscle. Animal by-products such as the liver have good ability for the formation of ZnPP and might be useful for improving the color of meat products. © 2014 Japanese Society of Animal Science.

  18. A regenerative zinc-air fuel cell

    Energy Technology Data Exchange (ETDEWEB)

    Smedley, Stuart I. [Electrochemical Technology Development Ltd., Lower Hutt (New Zealand); Zhang, X. Gregory [Teck Cominco Metals Ltd., 2380 Speakman Drive, Mississauga, Ontario (Canada)

    2007-03-20

    The zinc regenerative fuel cell (ZRFC) developed by the former Metallic Power Inc. over the period from 1998 to 2004 is described. The component technologies and engineering solutions for various technical issues are discussed in relation to their functionality in the system. The system was designed to serve as a source of backup emergency power for remote or difficult to access cell phone towers during periods when the main power was interrupted. It contained a 12 cell stack providing 1.8 kW, a separate fuel tank containing zinc pellet fuel and electrolyte, and a zinc electrolyzer to regenerate the zinc pellets during standby periods. Offsite commissioning and testing of the system was successfully performed. The intellectual property of the ZRFC technology is now owned by Teck Cominco Metals Ltd. (author)

  19. Zinc-Catalyzed Synthesis of Conjugated Dienoates through Unusual Cross-Couplings of Zinc Carbenes with Diazo Compounds.

    Science.gov (United States)

    Mata, Sergio; González, María J; González, Jesús; López, Luis A; Vicente, Rubén

    2017-01-23

    Zinc-catalyzed selective cross-coupling of two carbene sources, such as vinyl diazo compounds and enynones, enabled the synthesis of conjugated dienoate derivatives. This reaction involved the unprecedented coupling of a zinc furyl carbene with vinyl diazo compounds through the γ-carbon. Alternatively, dienoates were also prepared by a commutative cross-coupling of zinc vinyl carbenes generated from cyclopropenes and simple diazo compounds. © 2017 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim.

  20. Sources

    International Nuclear Information System (INIS)

    Duffy, L.P.

    1991-01-01

    This paper discusses the sources of radiation in the narrow perspective of radioactivity and the even narrow perspective of those sources that concern environmental management and restoration activities at DOE facilities, as well as a few related sources. Sources of irritation, Sources of inflammatory jingoism, and Sources of information. First, the sources of irritation fall into three categories: No reliable scientific ombudsman to speak without bias and prejudice for the public good, Technical jargon with unclear definitions exists within the radioactive nomenclature, and Scientific community keeps a low-profile with regard to public information. The next area of personal concern are the sources of inflammation. This include such things as: Plutonium being described as the most dangerous substance known to man, The amount of plutonium required to make a bomb, Talk of transuranic waste containing plutonium and its health affects, TMI-2 and Chernobyl being described as Siamese twins, Inadequate information on low-level disposal sites and current regulatory requirements under 10 CFR 61, Enhanced engineered waste disposal not being presented to the public accurately. Numerous sources of disinformation regarding low level radiation high-level radiation, Elusive nature of the scientific community, The Federal and State Health Agencies resources to address comparative risk, and Regulatory agencies speaking out without the support of the scientific community

  1. Actitudes europeos ante el envejecimiento y los personas mayores

    Directory of Open Access Journals (Sweden)

    ALAN WALKER

    1996-01-01

    Full Text Available n este artículo se realiza un análisis comparativo de las actitudes ante el envejecimiento y las personas mayores en los doce estados miembros de la unión europea. Está basado en datos originales de encuesta y se centra en la relación entre las personas mayores y los jovenes, la jubilación y las pensiones, los trabajadores de edad y el empleo, la atención social a las personas mayores y la política de la vejez. Por lo tanto, el artículo intenta proporcionar un resumen de las principales dimensiones de las actitudes publicas ante el envejecimiento en la union europea.

  2. Quadrupole interaction in zinc metal

    International Nuclear Information System (INIS)

    Vetterling, W.T.; Pound, R.V.

    1977-01-01

    To allow measurement of the quadrupole interaction in zinc metal, the enriched ZnO was reduced to zinc metal powder and compressed into a pill of thickness 1.4 gm/cm 2 . Sources were made by diffusing 20 mCi of 67 Ga into sintered copper pills. The transducer was based on a cylinder of PZT-4 with 1 / 2 -inch length and could cover linearly a velocity range of +-100 μ/s at 200 Hz. The multiscalar was a modified Northern model NS600, with a minimum dwell time of 20 μs, and with a 10-count buffer at the input to eliminate deadtime from memory cycling

  3. Prevalencia de trastornos temporomandibulares en el adulto mayor institucionalizado

    Directory of Open Access Journals (Sweden)

    Zenia Masiel Criado Mora

    Full Text Available Introducción: los trastornos temporomandibulares (TTM son una serie de signos y síntomas buco faciales de etiología multifactorial. En Cuba existen varias investigaciones que tratan sobre los TTM %sobre todo en jóvenes dentados% no conociéndose amplias referencias de este tipo de estudio en el adulto mayor. Objetivo: identificar la prevalencia de TTM en los adultos mayores institucionalizados, los signos y síntomas más frecuentes según edad y sexo. Métodos: se realizó un estudio descriptivo transversal en 113 adultos mayores de ambos sexos, institucionalizados en dos hogares de ancianos de la Habana, de marzo a abril de 2012. Se aplicó una encuesta donde se recogió sexo, edad, signos y síntomas. Las manifestaciones clínicas evaluadas fueron: la presencia de dolor muscular, dificultad al movimiento de abertura y cierre, dolor articular, dolor muscular articular, ruidos articulares, limitación de la abertura bucal, limitación de los movimientos de lateralidad y propulsión, desviación de la mandíbula. Resultados: el 40,70 % de los adultos mayores estudiados, presentaron afectación en la articulación temporomandibular. Los ruidos articulares fue el síntoma con mayor predominio en todos los grupos etarios (76,08 %, afectando al 82,35 % de los hombres y al 72,41 % de las mujeres. Seguido por el dolor muscular que se manifestó en el 52,17 % de los afectados, con mayor porcentaje en mujeres (58,62 % que en hombres (41,17 %. La dificultad para realizar los movimientos de abertura y cierre se detectó en el 28,26 % de los afectados con mayor prevalencia en el sexo femenino (34,48 % que en el masculino (17,14 %. Conclusiones. se observó una elevada prevalencia de TTM en los adultos mayores estudiados. Los signos y síntomas más frecuentes por edad y sexo fueron los ruidos articulares y el dolor muscular y la dificultad para realizar los movimientos de abertura y cierre.

  4. INTERVENCIÓN PSICOLÓGICA EN ADULTOS MAYORES

    Directory of Open Access Journals (Sweden)

    Ana Fernanda Rodríguez Uribe

    2010-01-01

    Full Text Available El objetivo de este artículo es plantear una propuesta de intervención psicológica dirigida a adultos mayores institucionalizados y no institucionalizados; para ello se tomó como referencia la situación actual del adulto, los estudios realizados entorno a esta etapa y específicamente lo relacionado con el diseño de programas de intervención, para finalmente exponer la propuesta de intervención psicológica que pretende no solo mejorar la calidad de vida del adulto mayor, sino abarcarlo desde sus diversas áreas de funcionamiento.

  5. Prevalencia de la dependencia funcional en personas mayores

    OpenAIRE

    Gázquez Linares, José Jesús; Pérez Fuentes, Mª del Carmen; Mercader Rubio, Isabel; Molero Jurado, Mª del Mar

    2011-01-01

    La consecuencia más inmediata del envejecimiento de la población actual, es el incremento de la dependencia. Así, el objetivo de este trabajo, es dar a conocer la prevalencia del nivel de dependencia para las actividades básicas e instrumentales en la población mayor de 60 años, en función del género, estado civil y la edad, seleccionando una muestra total de 1.222 personas. El nivel de dependencia es mayor entre las mujeres para casi todas las actividades básicas, siendo también las personas...

  6. Nivel de autotrascendencia en un grupo de adultos mayores mexicanos

    OpenAIRE

    Raúl Fernando Guerrero Castañeda; Ricardo Lara Pérez

    2017-01-01

    Introducción: La autotrascendencia es una expansión multidimensional personal, una conexión con los demás, el entorno y/o una entidad superior, está relacionada con el bienestar personal del adulto mayor. Objetivo: Determinar el nivel de autotrascendencia de un grupo de adultos mayores mexicanos. Materiales y Métodos: Estudio descriptivo de corte transversal; realizado en tres centros gerontológicos de Celaya, Guanajuato, México, muestra probabilística aleatoria n=118. Se incluyeron adultos m...

  7. NIVEL DE AUTOTRASCENDENCIA EN UN GRUPO DE ADULTOS MAYORES MEXICANOS

    OpenAIRE

    Guerrero Castañeda, Raúl Fernando; Lara Pérez, Ricardo

    2017-01-01

    RESUMEN Introducción: La autotrascendencia es una expansión multidimensional personal, una conexión con los demás, el entorno y/o una entidad superior, está relacionada con el bienestar personal del adulto mayor. Objetivo: Determinar el nivel de autotrascendencia de un grupo de adultos mayores mexicanos. Materiales y Métodos: Estudio descriptivo de corte transversal; realizado en tres centros gerontológicos de Celaya, Guanajuato, México, muestra probabilística aleatoria n=118. Se incluyero...

  8. BIENESTAR PSICOLOGICO: ADULTOS MAYORES, ACTIVOS A TRAVES DEL VOLUNTARIADO

    OpenAIRE

    FERRADA MUNDACA; LESLIE ISABEL; FERRADA MUNDACA; LESLIE ISABEL

    2011-01-01

    El propósito del presente estudio fue establecer el grado de bienestar psicológico en adultos mayores voluntarios del programa "Asesores Seniors" de Senama Región Bio Bio y no voluntarios, usuarios del CESF AM San Pedro de la comuna de San Pedro de la Paz. Corresponde a un estudio cuantitativo, de tipo descriptivo, correlacional y comparativo. La muestra estuvo constituida por 60 adultos mayores, donde 30 de ellos corresponde al grupo de voluntarios y los otros 30 al grupo...

  9. Apoyo social dignificante del adulto mayor institucionalizado. medellin, 2008

    OpenAIRE

    Cardona Arango, Doris; Segura Cardona, Angela María; Ordoñez Molina, Jaime Eduardo; Estrada Restrepo, Alejandro; Osorio Gómez, Jorge Julián; Chavarriaga Maya, Lina Marcela

    2011-01-01

    Objetivo Analizar el apoyo social del adulto mayor residente en los Centros de Bienestar del Anciano de Medellín registrados en la Secretaría de Bienestar Social en el año 2008. Materiales Estudio descriptivo transversal, que abordó algunas características relacionadas con el apoyo social recibido por 276 adultos mayores institucionalizados en 39 centros de protección social, con fuente de información primaria. El análisis de la información fue univariado y bivariado. Resultados Los institu...

  10. Properties of Co-deposited indium tin oxide and zinc oxide films using a bipolar pulse power supply and a dual magnetron sputter source

    International Nuclear Information System (INIS)

    Hwang, Man-Soo; Seob Jeong, Heui; Kim, Won Mok; Seo, Yong Woon

    2003-01-01

    Multilayer coatings consisting of metal layers sandwiched between transparent conducting oxide layers are widely used for flat panel display electrodes and electromagnetic shield coatings for plasma displays, due to their high electrical conductivity and light transmittance. The electrical and optical properties of these multilayer films depend largely on the surface characteristics of the transparent conducting oxide thin films. A smoother surface on the transparent conducting oxide thin films makes it easier for the metal layer to form a continuous film, thus resulting in a higher conductivity and visible light transmittance. Indium tin oxide (ITO) and zinc oxide (ZnO) films were co-deposited using a dual magnetron sputter and a bipolar pulse power supply to decrease the surface roughness of the transparent conducting oxide films. The symmetric pulse mode of the power supply was used to simultaneously sputter an In 2 O 3 (90 wt %) : SnO 2 (10 wt %) target and a ZnO target. We varied the duty of the pulses to control the ratio of ITO : ZnO in the thin films. The electrical and optical properties of the films were studied, and special attention was paid to the surface roughness and the crystallinity of the films. By co-depositing ITO and ZnO at a pulse duty ratio of ITO:ZnO=45:45 using a dual magnetron sputter and a bipolar pulse power supply, we were able to obtain amorphous transparent conducting oxide films with a very smooth surface which had a Zn-rich buffer layer under a In-rich surface layer. All of the films exhibited typical electrical and optical properties of transparent conducting oxide films deposited at room temperature

  11. Sulfidation of zinc plating sludge with Na2S for zinc resource recovery

    International Nuclear Information System (INIS)

    Kuchar, D.; Fukuta, T.; Onyango, M.S.; Matsuda, H.

    2006-01-01

    A high amount of zinc disposed in the landfill sites as a mixed-metal plating sludge represents a valuable zinc source. To recover zinc from the plating sludge, a sulfidation treatment is proposed in this study, while it is assumed that ZnS formed could be separated by flotation. The sulfidation treatment was conducted by contacting simulated zinc plating sludge with Na 2 S solution at S 2- to Zn 2+ molar ratio of 1.5 for a period of 1-48 h, while changing the solid to liquid (S:L) ratio from 0.25:50 to 1.00:50. The conversion of zinc compounds to ZnS was determined based on the consumption of sulfide ions. The reaction products formed by the sulfidation of zinc were identified by X-ray diffraction (XRD). As a result, it was found that the conversion of zinc compounds to ZnS increased with an increase in S:L ratio. A maximum conversion of 0.809 was obtained at an S:L ratio of 1.00:50 after 48 h. However, when the zinc sludge treated at S:L ratio of 1.00:50 for 48 h was subjected to XRD analyses, only ZnS was identified in the treated zinc sludge. The result suggested that the rest of zinc sludge remained unreacted inside the agglomerates of ZnS. The formation behavior of ZnS was predicted by Elovich equation, which was found to describe the system satisfactorily indicating the heterogeneous nature of the sludge

  12. Biovailability of copper and zinc in pig and cattle slurries

    NARCIS (Netherlands)

    Jakubus, M.; Dach, J.; Starmans, D.A.J.

    2013-01-01

    Slurry is an important source of macronutrients, micro-nutrients and organic matter. Despite the considerable fertilizer value of slurry, it may be abundant in amounts of copper and zinc originating from dietary. The study presents quantitative changes in copper and zinc in individual slurries (pig

  13. sources

    Directory of Open Access Journals (Sweden)

    Shu-Yin Chiang

    2002-01-01

    Full Text Available In this paper, we study the simplified models of the ATM (Asynchronous Transfer Mode multiplexer network with Bernoulli random traffic sources. Based on the model, the performance measures are analyzed by the different output service schemes.

  14. Chelators for investigating zinc metalloneurochemistry

    OpenAIRE

    Radford, Robert John; Lippard, Stephen J.

    2013-01-01

    The physiology and pathology of mobile zinc signaling has become an important topic in metalloneurochemistry. To study the action of mobile zinc effectively, specialized tools are required that probe the temporal and positional changes of zinc ions within live tissue and cells. In the present article we describe the design and implementation of selective zinc chelators as antagonists to interrogate the function of mobile zinc, with an emphasis on the pools of vesicular zinc in the terminals o...

  15. Estimating the global prevalence of zinc deficiency: results based on zinc availability in national food supplies and the prevalence of stunting.

    Directory of Open Access Journals (Sweden)

    K Ryan Wessells

    Full Text Available BACKGROUND: Adequate zinc nutrition is essential for adequate growth, immunocompetence and neurobehavioral development, but limited information on population zinc status hinders the expansion of interventions to control zinc deficiency. The present analyses were conducted to: (1 estimate the country-specific prevalence of inadequate zinc intake; and (2 investigate relationships between country-specific estimated prevalence of dietary zinc inadequacy and dietary patterns and stunting prevalence. METHODOLOGY AND PRINCIPAL FINDINGS: National food balance sheet data were obtained from the Food and Agriculture Organization of the United Nations. Country-specific estimated prevalence of inadequate zinc intake were calculated based on the estimated absorbable zinc content of the national food supply, International Zinc Nutrition Consultative Group estimated physiological requirements for absorbed zinc, and demographic data obtained from United Nations estimates. Stunting data were obtained from a recent systematic analysis based on World Health Organization growth standards. An estimated 17.3% of the world's population is at risk of inadequate zinc intake. Country-specific estimated prevalence of inadequate zinc intake was negatively correlated with the total energy and zinc contents of the national food supply and the percent of zinc obtained from animal source foods, and positively correlated with the phytate: zinc molar ratio of the food supply. The estimated prevalence of inadequate zinc intake was correlated with the prevalence of stunting (low height-for-age in children under five years of age (r = 0.48, P<0.001. CONCLUSIONS AND SIGNIFICANCE: These results, which indicate that inadequate dietary zinc intake may be fairly common, particularly in Sub-Saharan Africa and South Asia, allow inter-country comparisons regarding the relative likelihood of zinc deficiency as a public health problem. Data from these analyses should be used to determine

  16. Zinc triggers microglial activation.

    Science.gov (United States)

    Kauppinen, Tiina M; Higashi, Youichirou; Suh, Sang Won; Escartin, Carole; Nagasawa, Kazuki; Swanson, Raymond A

    2008-05-28

    Microglia are resident immune cells of the CNS. When stimulated by infection, tissue injury, or other signals, microglia assume an activated, "ameboid" morphology and release matrix metalloproteinases, reactive oxygen species, and other proinflammatory factors. This innate immune response augments host defenses, but it can also contribute to neuronal death. Zinc is released by neurons under several conditions in which microglial activation occurs, and zinc chelators can reduce neuronal death in animal models of cerebral ischemia and neurodegenerative disorders. Here, we show that zinc directly triggers microglial activation. Microglia transfected with a nuclear factor-kappaB (NF-kappaB) reporter gene showed a severalfold increase in NF-kappaB activity in response to 30 microm zinc. Cultured mouse microglia exposed to 15-30 microm zinc increased nitric oxide production, increased F4/80 expression, altered cytokine expression, and assumed the activated morphology. Zinc-induced microglial activation was blocked by inhibiting NADPH oxidase, poly(ADP-ribose) polymerase-1 (PARP-1), or NF-kappaB activation. Zinc injected directly into mouse brain induced microglial activation in wild-type mice, but not in mice genetically lacking PARP-1 or NADPH oxidase activity. Endogenous zinc release, induced by cerebral ischemia-reperfusion, likewise induced a robust microglial reaction, and this reaction was suppressed by the zinc chelator CaEDTA. Together, these results suggest that extracellular zinc triggers microglial activation through the sequential activation of NADPH oxidase, PARP-1, and NF-kappaB. These findings identify a novel trigger for microglial activation and a previously unrecognized mechanism by which zinc may contribute to neurological disorders.

  17. VOLUNTARIADO DE MAYORES: EJEMPLO DE ENVEJECIMIENTO PARTICIPATIVO Y SATISFACTORIO

    Directory of Open Access Journals (Sweden)

    María Silveria Agulló Tomás

    2002-01-01

    Full Text Available El objetivo general de este trabajo estriba en desarrollar el tema del voluntariado de mayores como un claro ejemplo de envejecimiento participativo y saludable. En la primera parte se definen los conceptos utilizados y se refleja el «envejecimiento activo» como expresión de una necesidad social más que sólo una tendencia en boga. La participación social de los mayores es destacada como interés prioritario tanto desde las instituciones políticas como socio-económicas. En la segunda, se ofrecen algunos datos e informaciones que ayudan a dibujar una panorámica internacional sobre la situación de los mayores como voluntarios. En la tercera se desarrollan las distintas actividades, tipología, opiniones y vivencias de voluntarios mayores en nuestro contexto español. Al final, entre otras conclusiones y propuestas, se subraya la relevancia de continuar y hacer realidad un «envejecimiento participativo», pero, eso sí, evitando el derrumbe hacia la «explotación» humana para construir una vejez más saludable y justa acorde con los principios básicos de toda sociedad democrática.

  18. Mayors and Public Education: The Case for Greater Involvement

    Science.gov (United States)

    Usdan, Michael D.

    2006-01-01

    Over the last generation, a new politics of education has evolved throughout the United States. Since the 1983 watershed report "A Nation at Risk" (National Commission on Excellence in Education, 1983), the country's most influential business and political leaders--and, more recently, mayors--have spearheaded efforts to improve student achievement…

  19. ALGUNOS ASPECTOS A CONSIDERAR SOBRE LA SEXUALIDAD DEL ADULTO MAYOR

    Directory of Open Access Journals (Sweden)

    Zoila Edith Hernández Zamora

    2008-12-01

    Full Text Available La presente investigación expone, a partir de una serie de entrevistas realizadas a una muestra de adultos mayores, aspectos relativos a la satisfacción general en la vida, así como las actitudes, conocimientos y prácticas de la sexualidad de un grupo de adultos mayores que asisten regularmente a una estancia diurna de la ciudad de Xalapa, Veracruz, México, misma que fue diseñada especialmente para este grupo etario. Se encontraron diferencias estadísticamente significativas entre la actitud hacia el ejercicio de la sexualidad de las personas mayores entre los hombres y las mujeres de la muestra, y entre .las personas que tienen pareja con relación a las que no tienen; así como que hay una diferencia estadísticamente significativa entre aquellas personas que tiene una o ninguna enfermedad y las que tienen dos o más enfermedades con respecto a su frecuencia de actividad sexual. Es de resaltar la escasez de conocimientos sobre aspectos básicos de la sexualidad que poseen estas personas mayores, lo que hace necesario el establecimiento de programas educativos que incluyan al personal de salud y a los mismos senectos.

  20. Will Mayor De Blasio Turn Back the School Reform Clock?

    Science.gov (United States)

    Meyer, Peter

    2014-01-01

    While heads were spinning, policy watchers seemed genuinely perplexed by New York City's Mayor de Blasio's education opinions. De Blasio opposed many of Bloomberg's reform efforts despite the achievement gains realized by the nation's largest school district during the last 12 years. Yet on close reading, de Blasio's nine-page education plan…

  1. Creatividad, creencias paranormales y deterioro cognitivo en personas mayores

    Directory of Open Access Journals (Sweden)

    Inmaculada Méndez

    2015-08-01

    Full Text Available En el caso de las personas mayores, el pensamiento estético y la creatividad son formas de mantener activas la mente y la imaginación, contribuyendo a prevenir el deterioro cognitivo. Asimismo tener un sistema de creencias religiosas o incluso un sistema de creencias o experiencias paranormales ha demostrado ser beneficioso sobre la salud de los ancianos. El objetivo del estudio fue estudiar la relación entre la creatividad, el grado de deterioro cognitivo y las creencias paranormales. Se analizaron si existían diferencias atendiendo a características sociodemográficas. A un grupo de 36 personas mayores (16 varones con edades comprendidas entre los 66 y 95 años se le administró el Mini-Examen-Cognoscitivo (MEC, el Test CREA y la Escala Mejorada de Creencias Paranormales. Los resultados principales destacan que: los sujetos con mejor estado cognitivo son los más creativos; los menos creativos poseían más Creencias religiosas tradicionales e incluso mayor superstición; los ancianos con mejor estado cognitivo eran los menos supersticiosos. Es destacable que los varones eran más creativos, mientras que las mujeres destacaban en creencias religiosas tradicionales. El estudio permite reflexionar sobre la importancia de que los profesionales que trabajen con personas mayores lleven a cabo programas que favorezcan la creatividad e incluso recaben información sobre el sistema de creencias.

  2. Resiliencia en cuidadores familiares de personas mayores dependientes

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    María Crespo

    2015-01-01

    Full Text Available El presente trabajo analiza la distribución de los niveles de resiliencia en cuidadores no profesionales (familiares de personas mayores dependientes, y explora las características que poseen los cuidadores altamente resilientes. Para ello se administró la escala CD-RISC a una muestra de 111 cuidadores. En función de las puntuaciones obtenidas, se distinguieron dos grupos: alta vs. moderada o baja resiliencia. Se analizaron las diferencias entre ambos grupos en las diversas variables que afectan al estrés del cuidador. Aunque hubo diferencias en el estado cognitivo del receptor de cuidado, las mayores diferencias se obtuvieron en las denominadas variables mediadoras, observando en los cuidadores con alta resiliencia mayores puntuaciones en: satisfacción con el apoyo social recibido, autoeficacia para controlar los pensamientos negativos, autoestima, autocuidado y extraversión; y siendo estas diferencias estadísticamente significativas. Asimismo los cuidadores altamente resilientes tendieron a manifestar una menor preocupación por los problemas del mayor, y presentaron menores niveles de sintomatología depresiva y ansiosa. Este estudio pone de manifiesto la importancia de la resiliencia como factor de protección en el ámbito del estrés crónico, incorporando aspectos positivos de la adaptación a los modelos teóricos de cuidado, los cuales tradicionalmente se han venido centrando en el desarrollo de sintomatología.

  3. Valores humanos y voluntariado: Un estudio en personas mayores

    Directory of Open Access Journals (Sweden)

    Antonio Ariza-Montes

    2017-02-01

    Diseño/metodología: Tras un análisis exploratorio inicial, se plantea un modelo de regresión logística para determinar en qué medida el catálogo de valores personales que posee un individuo ayuda a explicar la actividad de voluntariado entre las personas mayores. Aportaciones y resultados: Los resultados del modelo permiten afirmar que el hecho de que una persona mayor done o no tiempo a actividades de voluntariado puede ser satisfactoriamente explicado por el conjunto de valores humanos. Los resultados obtenidos revelan que los voluntarios jubilados presentan mayor sentido de la autotrascendencia y predisposición hacia el cambio, a la vez que denotan más aversión hacia la autopromoción y la conservación. Implicaciones prácticas: Para mejorar el nivel de compromiso y la motivación de los voluntarios mayores jubilados, y afrontar con firmeza los retos que amenazan al sector no lucrativo, los responsables de los recursos humanos de las entidades del tercer sector deberán buscar la coherencia entre los valores individuales y la naturaleza de la actividad que va a desempeñar el voluntario, incrementando de este modo el grado de identificación de estas personas. Valor añadido: A pesar de la abundante literatura que relaciona el voluntariado en personas mayores con el bienestar, tanto en términos de salud como de beneficios socioemocionales, y con las motivaciones de este colectivo a la hora de ejercer el voluntariado, no es frecuente hallar investigaciones que adopten como foco de análisis el perfil de los valores personales que incitan a estos individuos a colaborar con causas altruistas.

  4. Model Prediksi Kebutuhan Darah untuk Penderita Talasemia Mayor

    Directory of Open Access Journals (Sweden)

    Dwi Sarwani Sri Rejeki

    2014-02-01

    Full Text Available Pada dua tahun pertama kehidupan penderita talasemia mayor, umumnya menderita anemia dan membutuhkan tranfusi darah. Penelitian ini bertujuan membuat model prediksi kebutuhan darah bagi penderita talasemia mayor. Penelitian observasional dengan desain studi pendekatan potong lintang ini dilakukan pada sampel 79 penderita talasemia mayor yang melakukan transfusi rutin minimal satu bulan satu kali di Rumah Sakit Umum Banyumas, selama tahun 2012. Analisis regresi linier ganda digunakan untuk membuat model prediksi. Hasil penelitian menunjukkan bahwa 80,7% kebutuhan darah penderia talasemia mayor dijelaskan oleh variabel usia, berat badan, dan kadar hemoglobin sedangkan 19,3% dijelaskan oleh sebab-sebab yang lain. Rumus prediksi menyatakan setiap kenaikan usia 1 tahun maka kebutuhan darah akan bertambah sebanyak 0,816 mililiter dan setiap kenaikan 1 kilogram berat badan maka kebutuhan darah akan bertambah 13,4 mililiter serta apabila kadar hemoglobin mengalami penurunan 1 g/dL maka kebutuhan darah akan bertambah sebesar 81 mililiter. Patients with thalassemia major usually present within the first two years of life with severe anemia, need red blood cell transfusion. The objective of this study was to create a prediction model of blood transfusion need for patients with thalassemia mayor. This type of research was observational with cross sectional design. Samples are 79 patients with thalassemia major who perform routine transfusion at least once in a month at Banyumas hospital in 2012. Multiple linier regression analysis was used to create the model. The results showed that 80.7% blood requirements can be explained by variables of weight, haemoglobin level and age, while 19.3% is explained by other causes. Prediction formula states every increment of one year in age, the need for blood will increase by 0.816 millilitres and every increment of one kilogram of body weight, the need for blood will increase 13.4 millilitres, and when the haemoglobin

  5. Las personas mayores a través del cine

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    José Ramón Martínez Riera

    Full Text Available Resumen: El presente artículo hace un recorrido por las diferentes etapas del envejecimiento y de la vida de las personas mayores a través del cine. El cine es un arte que transmite ideas a través de la narración de historias, mediante imágenes que impactan en el aspecto psicoemocional de las personas. El cine nos sitúa en escenarios donde se muestran las relaciones humanas, en contextos difíciles de reproducir, los cuales nos permiten explorar la esfera de los sentimientos frente a situaciones de salud-enfermedad, de ponerse en lugar del “otro”: de la persona que sueña, padece y sufre, de los profesionales que intervienen, de la familia que convive, cuida, sufre con el enfermo, de los amigos... Y entre esos escenarios, sin duda, se encuentra el proceso de envejecimiento y los diferentes factores que influyen en él. Y sin embargo no suele prestársele excesiva atención a la aportación que el cine ha realizado y realiza como elemento de reflexión, análisis, debate y aprendizaje, más allá del mero entretenimiento en el que muchas veces se enmarca el cine. Pero, ¿cómo ha tratado el cine a las personas mayores? ¿cómo aborda las interrelaciones de las personas mayores con su entorno, su familia, su proceso de salud-enfermedad, sus miedos, sus emociones? ¿Trata igual a las personas mayores con independencia de su género? Y lo que puede ser más interesante, ¿contribuye el cine a mitigar o eliminar los tópicos y estereotipos existentes en el imaginario común en torno a las personas mayores?

  6. Council Appointed Mayors in Spain: Effects on Local Democracy

    Directory of Open Access Journals (Sweden)

    María Jesús García García

    2017-03-01

    Full Text Available This paper deals with the influence of having council appointed mayors on local governments. Five elements of local government systems are considered: the electoral system and its influence on the political composition of the local government; the local government structure and the distribution of functions and powers between mayor and council; the role of political parties; scrutiny of the executive and accountability; and citizen participation. This analysis highlights the effect that a council appointed mayor system has in terms of accountability and legitimacy, transparency and efficiency. KEYWORDS Local government systems, directly elected mayors, local governance, council appointed mayors, Local Government Structure; Political Parties; Citizen Participation; Accountability. El presente artículo toma en consideración los efectos que el sistema de elección del Alcalde tiene sobre la democracia local, basándose en la consideración cinco aspectos: el sistema electoral y su influencia en la composición política de las administraciones locales; la estructura de la administración local y la distribución de funciones entre los alcaldes y el pleno municipal; el papel de los partidos políticos; los mecanismos de control del ejecutivo local y la participación ciudadana. El estudio subraya especialmente la incidencia que el sistema de elección del alcalde por los concejales tiene en relación con los principios de responsabilidad, legitimidad, transparencia y eficiencia de la gestión local. PALABRAS CLAVE Gobierno local, elección directa de los alcaldes, elección indirecta de los alcaldes, estructura del gobierno local, partidos políticos, participación ciudadana, responsabilidad política.

  7. La calidad de vida del adulto mayor con Artritis Reumatoidea

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    Clara Gallardo

    2017-05-01

    Full Text Available Objetivo determinar la atención de Enfermería y su incidencia en la calidad de vida del adulto mayor con artritis reumatoidea atendidos en el subcentro de salud de Ambatillo en el período Julio – Diciembre 2013. Métodos y materiales: Estudio no experimental de diseño descriptivo aplicando técnicas de observación y cuestionario cuya población fue de 30 adultos mayores en los que se detectó la necesidad de investigar la problemática, cuyos resultados indican que los principales problemas que presentan los pacientes son: dolor e inflamación articular, incapacidad músculo esquelética, discapacidad etc. Re- sultados: La problemática que se aborda es la calidad de vida del adulto mayor con esta patología pues muchas veces no se da una atención basada en el estado emocional, respuesta fisiológica, aspecto físico al que se enfrenta tanto el paciente como su núcleo familiar.es asì que el 69% de adultos mayores con artritis reumatoidea , la misma manera el 75% del personal de enfermería que labora en el Subcentro de salud de Ambatillo Conclusiones: Una vez evidenciada la problemática de estudio se presenta como propuesta la elaboración de una Guía de Atención de Enfermería el mismo que permitirá valorar en forma integral, priorizar las necesidades de atención y brindar cuidados específicos en el adulto mayor con artritis reumatoidea.

  8. The relative contribution of natural zinc complexing agents and ZnSO4 to growth and zinc nutrition of maize

    International Nuclear Information System (INIS)

    Kumar, M.; Prasad, B.

    1989-01-01

    Relative evaluation of different natural zinc-complexes indicated that application of Zn-FA 2 (PM), Zn-FA 3 (Comp), Zn-FA 1 (BGS), Zn-FA 5 (PR), Zn-FA 4 (SS) and ZnSO 4 significantly enhanced the drymatter yield and zinc uptake by maize. The natural zinc-complexes in particular increased, to a greater extent, the uptake of both native and applied sources than that observed with ZnSO 4 as zinc carrier. Significant positive relationship between self-diffusion coefficient of Zn and drymatter yield and uptake of zinc by maize suggested that diffusion is responsible for the supply of zinc from ambient soil matrix to plant roots. (author). 12 refs., 5 tabs

  9. Different Choices of Drinking Water Source and Different Health Risks in a Rural Population Living Near a Lead/Zinc Mine in Chenzhou City, Southern China.

    Science.gov (United States)

    Huang, Xiao; He, Liping; Li, Jun; Yang, Fei; Tan, Hongzhuan

    2015-11-12

    This study aimed to describe the households' choices of drinking water sources, and evaluate the risk of human exposure to heavy metals via different drinking water sources in Chenzhou City of Hunan Province, Southern China. A cross-sectional face-to-face survey of 192 householders in MaTian and ZhuDui village was conducted. The concentrations of heavy metals in their drinking water sources were analyzed. Carcinogenic and non-carcinogenic risk assessment was performed according to the method recommended by the United States Environmental Protection Agency. In total, 52.60% of the households used hand-pressed well water, and 34.89% used barreled water for drinking. In total, 6.67% of the water samples exceeded the Chinese drinking water standards. The total health risk of five metals is 5.20 × 10(-9)~3.62 × 10(-5). The total health risk of five metals was at acceptable levels for drinking water sources. However, the total risk of using hand-pressed well water's highest value is 6961 times higher than the risk of using tap water. Household income level was significantly associated with drinking water choices. Arsenic (As) and lead (Pb) are priority controlled pollutants in this region. Using safe drinking water (tap water, barreled water and so on) can remarkably reduce the risk of ingesting heavy metals.

  10. Corrosion and solubility in a TSP-buffered chemical environment following a loss of coolant accident: Part 2 – Zinc

    International Nuclear Information System (INIS)

    Pease, David; LaBrier, Daniel; Ali, Amir; Blandford, Edward D.; Howe, Kerry J.

    2016-01-01

    Highlights: • Zinc release is limited to less than 1 mg/L in TSP-buffered solution under a variety of conditions (pH, temperature, zinc source). • Zinc release in high-temperature non-TSP-buffered environment is approximately 25 mg/L. • Long-term zinc release is controlled by passivation (without TSP) and zinc solubility (with TSP). • Precipitation and solubility of zinc phosphate limit the release of zinc. - Abstract: Bench experiments were conducted to investigate the effect of the presence of trisodium phosphate (TSP) on the corrosion and release of zinc from metallic zinc-bearing surfaces under conditions representative of the containment pool following a postulated loss of coolant accident (LOCA) at a nuclear power generating facility. The experiments showed that in non-buffered (acidic) environments, measurable quantities of zinc are released from zinc-bearing surfaces. Precipitation and solubility of phosphate-based corrosion products, such as zinc phosphate, limit the release of zinc from zinc-bearing surfaces. These experiments have found that under a variety of conditions, including variations of temperature, pH, and across different zinc-bearing surfaces, the release of zinc into solution is limited to <1 mg/L when phosphate is present. When phosphate is not present, zinc release is instead bounded by a markedly higher saturation limit which is a strong function of the solution temperature.

  11. Zoning and contamination rate of magnesium and heavy metals of iron, zinc and copper in the north and northwest aquifer of Khoy (Zourabad based on GIS and determining the contaminated source

    Directory of Open Access Journals (Sweden)

    Fariborz Khodadadi

    2015-04-01

    Full Text Available Introduction Heavy metals are the most toxic pollutants in aquatic ecosystems. This contamination can result from the release of heavy metal elements during alteration and weathering of ultramafic and mafic rocks (ophiolite zones. Among the important metals and pollutants in the ophiolite; chromium, cobalt, nickel, iron, magnesium, manganese, zinc and copper could be noted. Basically, a mass of serpentine consists of serpentine, amphibole, talc, chlorite, magnetite, and the remainder of olivine, pyroxene and spinel (Kil et al., 2010. In such areas, the prevailing cold climate, during the serpentinization, chloritization and epidotiization, the activity of the solvent, such as chloride, fluoride, carbonates, sulfide, sulfosalt would be able to import the elements such as magnesium and iron, copper and zinc into the soil and groundwater. The study area is located in northwestern Iran. This area is located in the northwest of the city of Khoy. Because of the proximity to the north and northwest Khoy plains with ophiolite rocks, the soil of this region could possibly show the potential of contamination with heavy metals. Due to the toxicity and disease of unauthorized grades of these elements in groundwater in the study area, this study is focused on the more contaminated groundwater of the areas. Materials and methods In this study, over a period of 5 days, sampling from 42 water sources, including fountains, aqueducts, wells, piezometers and wells in operation, was performed. The container was washed with acid and then rinsed 3 times with the water sample. The pH and temperature of the water in the samples was measured in the field. Then to each of the samples was taken from 2 to 5 ml of concentrated nitric acid (This causes that the metal elements would not adsorbed or precipitated by these particles and pH of the samples was measured with litmus paper to reach level 2. This was done to ensure the consolidation of the water samples. Analysis of

  12. Isotopic signatures suggest important contributions from recycled gasoline, road dust and non-exhaust traffic sources for copper, zinc and lead in PM10 in London, United Kingdom

    Science.gov (United States)

    Dong, Shuofei; Ochoa Gonzalez, Raquel; Harrison, Roy M.; Green, David; North, Robin; Fowler, Geoff; Weiss, Dominik

    2017-09-01

    The aim of this study was to improve our understanding of what controls the isotope composition of Cu, Zn and Pb in particulate matter (PM) in the urban environment and to develop these isotope systems as possible source tracers. To this end, isotope ratios (Cu, Zn and Pb) and trace element concentrations (Fe, Al, Cu, Zn, Sb, Ba, Pb, Cr, Ni and V) were determined in PM10 collected at two road sites with contrasting traffic densities in central London, UK, during two weeks in summer 2010, and in potential sources, including non-combustion traffic emissions (tires and brakes), road furniture (road paint, manhole cover and road tarmac surface) and road dust. Iron, Ba and Sb were used as proxies for emissions derived from brake pads, and Ni, and V for emissions derived from fossil fuel oil. The isotopic composition of Pb (expressed using 206Pb/207Pb) ranged between 1.1137 and 1.1364. The isotope ratios of Cu and Zn expressed as δ65CuNIST976 and δ66ZnLyon ranged between -0.01‰ and +0.51‰ and between -0.21‰ and +0.33‰, respectively. We did not find significant differences in the isotope signatures in PM10 over the two weeks sampling period and between the two sites, suggesting similar sources for each metal at both sites despite their different traffic densities. The stable isotope composition of Pb suggests significant contribution from road dust resuspension and from recycled leaded gasoline. The Cu and Zn isotope signatures of tires, brakes and road dust overlap with those of PM10. The correlation between the enrichments of Sb, Cu, Ba and Fe in PM10 support the previously established hypothesis that Cu isotope ratios are controlled by non-exhaust traffic emission sources in urban environments (Ochoa Gonzalez et al., 2016). Analysis of the Zn isotope signatures in PM10 and possible sources at the two sites suggests significant contribution from tire wear. However, temporary additional sources, likely high temperature industrial emissions, need to be invoked

  13. Simulation of the concentration of SO{sub 2} issued by major stationary sources in 2003 in northwestern Chiapas and central Tabasco, Mexico; Simulacion de la concentracion de SO{sub 2} emitido por fuentes fijas mayores durante 2003 en el noroeste de Chiapas y centro de Tabasco, Mexico

    Energy Technology Data Exchange (ETDEWEB)

    Valdes Manzanilla, Arturo [Division Academica de Ciencias Biologicas, UJAT, Villahermosa, Tabasco (Mexico)]. E-mail: avmanzanilla@hotmail.com; Fernandez Garcia, German [Universidad Autonoma de Guadalajara Campus Tabasco, Villahermosa, Tabasco (Mexico); Ramos Herrera, Sergio [Division Academica de Ciencias Biologicas, UJAT, Villahermosa, Tabasco (Mexico); Bautista Margulis, Raul G. [Division Academica de Ciencias Biologicas, UJAT, Villahermosa, Tabasco (Mexico)

    2008-05-15

    The CALPUFF dispersion model was used to simulate the spatial distribution of the SO{sub 2} emitted by Petroleos Mexicanos (PEMEX) gas-processing complexes in Cactus, NW Chiapas, Nuevo PEMEX and Ciudad PEMEX, in central Tabasco, during 2003. It was found that the zone with the highest concentrations of SO{sub 2} is located SW from the PEMEX facilities. The zone, where the World Health Organization's norm for SO{sub 2} is surpassed (20 {mu}g/m{sup 3}), includes the city of Reforma, Chiapas and Ciudad PEMEX, Tabasco. [Spanish] El modelo de dispersion CALPUFF fue usado para simular la distribucion espacial de la concentracion de SO{sub 2} emitido por los complejos procesadores de gas de Petroleos Mexicanos (PEMEX) en Cactus, en el noroeste de Chiapas, Nuevo PEMEX y Ciudad PEMEX, en el centro de Tabasco, durante 2003. Se encontro que la zona con mayor concentracion de SO{sub 2} esta localizada al suroeste de las instalaciones de la empresa petrolera. La zona, donde la norma de la Organizacion Mundial de la Salud para el SO{sub 2} es sobrepasada (20 {mu}g/m{sup 3}), incluye la ciudad de Reforma, Chiapas y Ciudad PEMEX, Tabasco.

  14. Adultos mayores cuidadores: sobrecarga y dimensión afectiva

    Directory of Open Access Journals (Sweden)

    Serrana Banchero

    2017-05-01

    Full Text Available Este trabajo plantea la relación entre la sobrecarga del cuidador y la dimensión afectiva del cuidado en personas mayores cuidadoras. En la actualidad el cuidado es entendido como una problemática social pública, y por lo tanto objeto de políticas públicas. Uruguay es un país envejecido debido a los cambios socio-demográficos que han acontecido por lo que han aumentado las situaciones de dependencia y las demandas de cuidados. De este modo, las personas mayores no solo son receptores sino también proveedores de cuidados. El cuidado implica la dimensión material, económica y afectiva, y los cuidadores como consecuencia de su tarea de cuidar, pueden experimentar el síndrome de sobrecarga del cuidador. Se trata de un diseño cuali-cuantitativo y consiste en un estudio de caso utilizando entrevistas individuales con aplicación de instrumentos según la categorización de la muestra finalista que fue Personas Mayores Cuidadoras y no Cuidadoras. Se analizará la variable sobrecarga del cuidador con las características de la relación cuidador-cuidado. La muestra es finalista y se constituyó por 74 personas mayores usuarios regulares del Subprograma Adultos Mayores del Programa Apex-Cerro (UdelaR de la ciudad de Montevideo, Uruguay. Los resultados mostraron que aparece una visión totalizante del cuidado, así como relatos autorreferenciales. El 29,7% son personas mayores cuidadoras, de los cuales el 15,7% presentan el síndrome de sobrecarga del cuidador (siendo todas mujeres y la edad mediana de 65,5 años. En el análisis de la dimensión afectiva del cuidado se observan características de un tipo de vínculo co-dependiente entre el cuidador y el cuidado.

  15. In-house zinc SAD phasing at Cu Kα edge.

    Science.gov (United States)

    Kim, Min-Kyu; Lee, Sangmin; An, Young Jun; Jeong, Chang-Sook; Ji, Chang-Jun; Lee, Jin-Won; Cha, Sun-Shin

    2013-07-01

    De novo zinc single-wavelength anomalous dispersion (Zn-SAD) phasing has been demonstrated with the 1.9 Å resolution data of glucose isomerase and 2.6 Å resolution data of Staphylococcus aureus Fur (SaFur) collected using in-house Cu Kα X-ray source. The successful in-house Zn-SAD phasing of glucose isomerase, based on the anomalous signals of both zinc ions introduced to crystals by soaking and native sulfur atoms, drove us to determine the structure of SaFur, a zinc-containing transcription factor, by Zn-SAD phasing using in-house X-ray source. The abundance of zinc-containing proteins in nature, the easy zinc derivatization of the protein surface, no need of synchrotron access, and the successful experimental phasing with the modest 2.6 Å resolution SAD data indicate that inhouse Zn-SAD phasing can be widely applicable to structure determination.

  16. Bienestar psicológico subjetivo y personas mayores residentes

    Directory of Open Access Journals (Sweden)

    Ana Concepción Flecha García

    2014-12-01

    Full Text Available La mejora del bienestar psicológico subjetivo y, con él, la calidad de vida de las personas mayores residentes es el propósito esencial de este trabajo. Los teóricos destacan la importancia que desempeña el bienestar subjetivo sobre la calidad de vida y su interés en la experiencia de envejecer. Concebimos la calidad de vida como un concepto multidimensional que engloba componentes objetivos y subjetivos referidos al bienestar físico y psico-social de las personas, y su evaluación incluye la percepción subjetiva que tiene el sujeto de estas dimensiones. Entendemos el bienestar psicológico subjetivo, como la valoración positiva, afectiva y cognitiva, de bienestar y satisfacción con la vida entendida como “estar y sentirse bien en el presente” y, “estar y sentirse bien con el propio recorrido vital”.El principal objetivo del estudio es conocer las necesidades de los residentes relacionadas con los componentes específicos del bienestar y satisfacción vital que la investigación revela mas asociados a las personas mayores –vínculos personales, vida activa, reminiscencia y recuerdos felices, optimismo-, y la satisfacción vital; conocer la conexión entre estas dimensiones e identificar posibles factores relacionados con las mismas, completan el fin de este trabajo.Se plantea un modelo metodológico que permite recoger el sentimiento y opinión de las personas mayores desde su propia experiencia de bienestar y satisfacción vital. El enfoque y su carácter interpretativo favorecen la comprensión e interpretación de la información tal y como es percibida por los participantes que viven y se relacionan en un determinado contexto social. Se elige para tal fin la orientación , realizando el posterior. Se recoge la información mediante una entrevista semiestructurada elaborada en base a los fines propuestos. La muestra se compone de 66 personas seleccionas en

  17. propiedades psicométricas en adultos mayores

    Directory of Open Access Journals (Sweden)

    Armando Rivera-Ledesma

    2013-01-01

    Full Text Available La presente investigación propone la adaptación al español y validación de la Escala de Soporte Social (ESS-AM de Tagaya, Okuno, Tamura y Davis (2000, conducida en cuatro muestras independientes de adultos mayores de la Ciudad de México. La escala, de ocho reactivos, mide la percepción de apoyo social mediante un solo factor que explica el 60,7% de la varianza, con una consistencia interna a de 0,84 y correlaciones negativas significativas con la variable soledad. Con base en ello, se concluye que la ESS-AM es un instrumento confiable, útil y sencillo en funciones de tamizaje para evaluar si el adulto mayor cuenta con adecuados niveles de apoyo social percibido.

  18. Effect of zinc source and picolinic acid on 65Zn uptake in an in vitro continuous-flow perfusion system for pig and poultry intestinal segments

    International Nuclear Information System (INIS)

    Hill, D.A.; Peo, E.R. Jr.; Lewis, A.J.

    1987-01-01

    Twenty weanling pigs and fourteen 9-wk-old broiler chickens were used in three continuous-flow in vitro perfusion experiments using noneverted intestinal sacs to 1) determine differences in 65 Zn absorption due to location within the intestinal tract, 2) evaluate 65 Zn uptake from ZnCl 2 and Zn-methionine (ZnMet) with or without added picolinic acid (PA) in pig intestinal sacs and 3) evaluate 65 Zn uptake from ZnCl 2 and ZnMet in chicken intestinal sacs. No differences in 65 Zn uptake due to gut segment position were observed in the pigs. A Zn source x PA interaction was observed for 65 Zn uptake into the pig gut tissue and for 65 Zn uptake to the serosal side of the gut sacs. Total 65 Zn absorption in the pig gut sacs from the two Zn sources was not different, but the addition of a 5 M ratio of PA to Zn depressed 65 Zn absorption. No differences were observed in total 65 Zn absorption or 65 Zn uptake in poultry gut sac tissue. There was, however, greater uptake of 65 Zn from ZnCl 2 to the serosal side of the sacs than from ZnMet. The data indicate that 65 Zn from ZnCl 2 and ZnMet is similar in total absorption and that the addition of PA depresses Zn uptake

  19. Intervención de trabajo social con adultos mayores

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    Yesica Rodríguez Montañez

    2003-01-01

    Full Text Available El artículo presenta las metodologías de intervención del Trabajo Social con adultos mayores realizando un recorrido por los términos envejecimiento y vejez, haciendo énfasis en la importancia de la pérdida en la concepción de la misma . Se realiza un aná

  20. Usos de las herramientas digitales entre las personas mayores

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    Javier Fombona Cadavieco

    2012-10-01

    Full Text Available Una sociedad «multiedades» supone diseñar y crear nuevos espacios de aprendizaje y comunicación, capaces de gestionar la demanda existente por parte de las personas mayores. En este artículo, se aborda la relación de las personas mayores con las tecnologías de la información y la comunicación (TIC y para ello se plantean dos objetivos: el primero va dirigido a conocer los recursos tecnológicos que utilizan y el segundo, a describir objetivamente los tipos de uso que estas personas hacen de las TIC. Para ello, se utiliza la técnica de encuesta, cuyos resultados son contrastados mediante grupos de discusión. En el estudio participaron 215 personas mayores usuarias de las TIC y siete grupos de discusión de cinco personas cada uno. Los resultados encontrados indican que los recursos que más utilizan los mayores son, los ordenadores e Internet y el uso que hacen de los mismos se ha agrupado en cuatro grandes categorías: formación, información, comunicación y entretenimiento, no encontrándose diferencias significativas en función del género o de la edad y sí se encontraron diferencias en cuanto a la disponibilidad de dichos recursos para uso particular en función del nivel de estudios.

  1. Efeito do tratamento com fontes de zinco e boro na germinação e vigor de sementes de milho Effects of maize seed treated with zinc and boron sources on germination and vigour

    Directory of Open Access Journals (Sweden)

    N.D. Ribeiro

    1994-12-01

    Full Text Available Foi conduzido um experimento no Departamento de Fitotecnia da Universidade Federal de Santa Maria, RS, no período de março a novembro de 1992, com o objetivo de verificar o efeito da aplicação de fontes de zinco e boro em sementes de milho tratadas ou não com defensivos agrícolas. Adotou-se o esquema fatorial 3x2x6, em delineamento inteiramente casualizado, com quatro repetições. Os tratamentos constaram de avaliações em três épocas (logo após o tratamento, quatro e oito meses depois, utilização de sementes de milho com e sem tratamento fítossanitário, combinados com seis fontes de zinco e boro (testemunha, Zn-Biocrop, B-Biocrop, E-Orgânico, Zn-Biocrop + B-Biocrop e Zn-Biocrop + B-Orgânico, nas doses únicas de 2,50g Zn e de 0,15g B/kg de sementes. Os resultados obtidos mostram que a aplicação da fonte Zn-Biocrop não prejudica a germinação e o vigor, pelo período de oito meses de armazenamento. O tratamento de sementes com boro (B-Biocrop e B-Orgânico diminui a germinação e o vigor.The experiment was carried during the period of march 1992 to november 1992, to study the effects of maize seed treatment with zinc, boron and pesticides, on the germination and vigour during storage. The experimental design was a complete randomized 3x2x6 fatorial with four replicátions. The treatments were three storage periods (zero, four and eight month, pesticides treatments with or without, and six sources of zinc and boron (control, Zn-Biocrop, B-Biocrop, Organic-B, Zn-Biocrop -I- B-Biocrop and Zn-Biocrop + Organic-B, in the dose 2.50g of the Zn and 0.l5g of the B/kg of seeds. The results show that Zn-Biocrop maintain high germination and vigour for eight month of storage. The boron treatment (B-Biocrop and Organic-B showed a low germination and vigour.

  2. La competencia mediática en personas mayores

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    Isidro Marín Gutiérrez

    2013-07-01

    Full Text Available Este artículo ha sido realizado gracias al proyecto I+D+i titulado “La competencia en comunicación audiovisual en un entorno digital” (I+D: EDU 2010-21395-C03 financiado por el Ministerio de Ciencia y Tecnología del Gobierno de España. En ella analizamos el pretest que evaluaba la competencia mediática de personas mayores de 60 años de La Rioja y de Huelva. Los resultados arrojados fueron tenidos en cuenta para el proceso de encuestación que se está realizando actualmente en 10 provincias españolas con una muestra de 615 personas mayores de 60 años. En este artículo estudiaremos el estado de la cuestión en torno a las competencias mediáticas de las personas mayores de 60 años.

  3. Resocialización en el Adulto Mayor

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    Zandra Liliana Cabara

    2004-11-01

    Full Text Available Este artículo plantea un estudio sobre la descripción de métodos de resocialización en el adulto mayor, evidenciando sus potencialidades como auto transformador de su mundo circundante dejando de Iado preconceptos sobre la vejez. Las reflexiones que se plantean en este articulo son producto de un estudio preliminar, don de se aplicó una prueba piloto a tres adultos mayores de diferentes niveles socioculturales pero pertenecientes al mismo estrato económico que se encuentran formando parte de un grupo organizado de atención integral al Adulto Mayor, coordinado por una Fundación Gerontológica en el municipio de Duitama. Se hace un análisis comparativo mediante un método de investigación cualitativa y descriptiva. Restaría, profundizar en la investigación e incluir un estudio comparativo de abuelos con características similares no pertenecientes a grupos organizados.

  4. Zinc phosphate conversion coatings

    Science.gov (United States)

    Sugama, Toshifumi

    1997-01-01

    Zinc phosphate conversion coatings for producing metals which exhibit enhanced corrosion prevention characteristics are prepared by the addition of a transition-metal-compound promoter comprising a manganese, iron, cobalt, nickel, or copper compound and an electrolyte such as polyacrylic acid, polymethacrylic acid, polyitaconic acid and poly-L-glutamic acid to a phosphating solution. These coatings are further improved by the incorporation of Fe ions. Thermal treatment of zinc phosphate coatings to generate .alpha.-phase anhydrous zinc phosphate improves the corrosion prevention qualities of the resulting coated metal.

  5. The interaction between the light source dose and caspase-dependent and -independent apoptosis in human SK-MEL-3 skin cancer cells following photodynamic therapy with zinc phthalocyanine: A comparative study.

    Science.gov (United States)

    Doustvandi, Mohammad Amin; Mohammadnejad, Fateme; Mansoori, Behzad; Mohammadi, Ali; Navaeipour, Farzaneh; Baradaran, Behzad; Tajalli, Habib

    2017-11-01

    The aim of this study is to determine the behavior of relative expression of Bcl-2, caspase-8, caspase-9, and caspase-3 genes of/in SK-MEL-3 cancer cells and explore molecular mechanisms responsible for the apoptosis response during an in vitro photodynamic therapy (PDT) with Zinc Phthalocyanine (ZnPc) using different doses of the light source. In this study, firstly the cytotoxic effects of ZnPc-PDT on SK-MEL-3 cells were evaluated. By irradiating the laser, ZnPc induced a significant amount of apoptosis on SK-MEL-3 cells in three IC 50 s including 0.064±0.01, 0.043±0.01, and 0.036±0.01μg/mL at the doses of 8, 16, and 24J/cm 2 , respectively. Moreover, flow cytometry and QRT-PCR experiments were done. The high percentage of apoptotic cells was seen in the early apoptosis stage. The expression of Bcl-2 and caspase-8 genes at all doses of laser experienced an obvious reduction in comparison to the control group. On the other hand, although the expression of caspase-9 and caspase-3 genes remains almost constant at 8J/cm 2 , but they faced an increment at 16 and 24J/cm 2 doses. These data reveal caspase-dependent apoptosis in high and caspase-independent apoptosis in low doses of laser. Based on the results of present work, it can be suggested that the dose of the light source is a key factor in induction of caspase-dependent and caspase-independent apoptosis pathways following PDT. Copyright © 2017. Published by Elsevier B.V.

  6. Zinc fingers, zinc clusters, and zinc twists in DNA-binding protein domains

    International Nuclear Information System (INIS)

    Vallee, B.L.; Auld, D.S.; Coleman, J.E.

    1991-01-01

    The authors recognize three distinct motifs of DNA-binding zinc proteins: (i) zinc fingers, (ii) zinc clusters, and (iii) zinc twists. Until very recently, x-ray crystallographic or NMR three-dimensional structure analyses of DNA-binding zinc proteins have not been available to serve as standards of reference for the zinc binding sites of these families of proteins. Those of the DNA-binding domains of the fungal transcription factor GAL4 and the rat glucocorticoid receptor are the first to have been determined. Both proteins contain two zinc binding sites, and in both, cysteine residues are the sole zinc ligands. In GAL4, two zinc atoms are bound to six cysteine residues which form a zinc cluster akin to that of metallothionein; the distance between the two zinc atoms of GAL4 is ∼3.5 angstrom. In the glucocorticoid receptor, each zinc atom is bound to four cysteine residues; the interatomic zinc-zinc distance is ∼13 angstrom, and in this instance, a zinc twist is represented by a helical DNA recognition site located between the two zinc atoms. Zinc clusters and zinc twists are here recognized as two distinctive motifs in DNA-binding proteins containing multiple zinc atoms. For native zinc fingers, structural data do not exist as yet; consequently, the interatomic distances between zinc atoms are not known. As further structural data become available, the structural and functional significance of these different motifs in their binding to DNA and other proteins participating in the transmission of the genetic message will become apparent

  7. Zinc in diet

    Science.gov (United States)

    ... Effects Symptoms of zinc deficiency include: Frequent infections Hypogonadism in males Loss of hair Poor appetite Problems with the ... any medical emergency or for the diagnosis or treatment of any medical condition. A licensed physician should ...

  8. Desarrollo de procesos hidrometalúrgicos para la fabricación de compuestos de zinc a parir de óxido Waelz

    OpenAIRE

    Herrero Villalibre, Diego

    2011-01-01

    309 p. La producción de zinc secundario presenta una serie de ventajas con respecto a la obtención de zinc primario, entre ellas destacan su menor impacto ambiental y el hecho de que el zinc se obtiene a partir de residuos industriales, evitando el consumo de un recurso natural. La mayor parte de este zinc secundario se obtiene a través de procesos pirometalúrgicos. En la actualidad, la hidrometalurgia se presenta como una interesante alternativa principalmente por su menor consumo ener...

  9. Effects of dietary supplementation with tribasic zinc sulfate or zinc sulfate on growth performance, zinc content and expression of zinc transporters in young pigs.

    Science.gov (United States)

    Deng, Bo; Zhou, Xihong; Wu, Jie; Long, Ciming; Yao, Yajun; Peng, Hongxing; Wan, Dan; Wu, Xin

    2017-10-01

    An experiment was conducted to compare the effects of zinc sulfate (ZS) and tribasic zinc sulfate (TBZ) as sources of supplemental zinc on growth performance, serum zinc (Zn) content and messenger RNA (mRNA) expression of Zn transporters (ZnT1/ZnT2/ZnT5/ZIP4/DMT1) of young growing pigs. A total of 96 Duroc × Landrace × Yorkshire pigs were randomly allotted to two treatments and were fed a basal diet supplemented with 100 mg/kg Zn from either ZS or TBZ for 28 days. Feed : gain ratio in pigs fed TBZ were lower (P zinc transporter in either duodenum or jejunum of pigs fed TBZ were higher (P < 0.05) than pigs fed ZS. These results indicate that TBZ is more effective in serum Zn accumulation and intestinal Zn absorption, and might be a potential substitute for ZS in young growing pigs. © 2017 Japanese Society of Animal Science.

  10. Prevalencia de depresión mayor en adultos mayores atendidos ambulatoriamente en un hospital de lima metropolitana

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    Magnolia Matutti Rosas

    2016-12-01

    Full Text Available RESUMEN: El objetivo del presente estudio es describir, analizar prevalencia y factores de riesgo predictivo asociado a depresión mayor, en adultos mayores atendidos en consulta ambulatoria de psiquiatría de un hospital, y en un grupo de adultos mayores no asegurados. Se evaluó a 79 adultos mayores no asegurados de una comunidad del Callao y a 221 pacientes con depresión y depresión comórbida, atendidos en consulta ambulatoria de psiquiatría. Se aplicó una encuesta de consumo de medicamentos. Los resultados indican que los factores demográficos son independientes de depresión en ambos grupos (OR=1.792, IC95%=0.573-5.606, edad; OR=1.123, IC95%=0.435-4.768, sexo; OR=2.344, IC95%=0.325-16.928, autopercepción de salud; OR=1.905, IC95%=0.642-2.434, depresión; OR=1. 250, IC95%=0.642-2.434, consumo de medicamentos; OR=1.260, IC95%=0.763-2.084, número de enfermedad. Las personas no aseguradas evidencian depresión comórbida con diabetes mellitus, HTA, Artrosis, encontrando mayor frecuencia en mujeres de 60 a 75 años que en mujeres de 76 años a más. ABSTRACT: Objective: To describe, analyze prevalence and predictive risk factors associated with major depression, seniors attended outpatient psychiatric, and uninsured. Material and Methods: 79 elderly uninsured community surrounding Callao to EsSalud, Survey of Drug Consumption applies; and 221 patients with depression and comorbid depression, diagnosed in Psychiatry Clinic. It was used, the Drug Consumption Survey. Results: Demographic factors are independent of depression in both groups (OR = 1.792, 95%CI = 0.573-5.606, age; OR = 1.123, 95%CI = 0.435-4.768, sex; OR = 2.344, 95%CI = 0.325-16.928, health self-perception; OR = 1,905, 95%CI = 0.642 -2.434, depression;, OR = 1. 250, 95%CI = 0.642-2.434, drug use; OR = 1260, 95%CI = 0.763-2.084, disease number. Uninsured comorbid with depression show DM, hypertension, osteoarthritis, and women age 60-75 It is more frequent than in Group 76

  11. Soil micronutrients and its uptake by rice plant. Part of a coordinated programme on isotope-aided micronutrient studies in rice production with special reference to zinc deficiencies

    International Nuclear Information System (INIS)

    Kim, T.S.

    1980-02-01

    A series of field and greenhouse experiments with flooded rice was carried out on contrasting soil types of Korea to study the zinc status of soils, evaluate the chemical methods for extracting zinc from soils in terms of ability to identify zinc deficiency, perform 65 Zn-aided experiments including the residual effects of zinc fertilizers to evaluate the efficiency of zinc sources and methods of zinc application to rice, and associated studies on factors affecting zinc nutrition in rice such as effect of organic matter and chelates. The results show that i) 0.05 N HCl solution for extracting available zinc in soil was effective to separating the soils which require zinc fertilizer application. The proposed zinc value to identify is 2.4 ppm. Among rice soils surveyed, the red-yellow podsolic soil derived from basalt, the reddish-brown lateritic soil of calcareous material and newly reclaimed saline soils were shown to be below this limit; ii) 5 kg Zn/ha as zinc sulphate introduced the highest response in terms of % Zndff, total zinc yield in rice plant, and the fertilizer zinc use efficiency. Applying higher zinc amounts, in case of 20 kg Zn/ha, retarded nitrogen uptake by the plant and as a result the rice grain yield was decreased; iii) Significant yields increases due to the residual effects of zinc fertilizers were obtained on the second and third crops; iv) On the zinc-deficient calcareous soil the use of chelated zinc sources is recommended

  12. Behavior of arsenic in hydrometallurgical zinc production and environmental impact

    Directory of Open Access Journals (Sweden)

    Peltekov A.B.

    2014-12-01

    Full Text Available The presence of arsenic in zinc sulphide concentrates is particularly harmful, because it creates problems in zinc electrolysis. The main source of arsenic in non-ferrous metallurgy is arsenopyrite (FeAsS. In oxidative roasting of zinc concentrates, FeAsS oxidizes to arsenic oxides (As2O3, As2O5. In this connection a natural FeAsS was examined, and also the distribution of arsenic in the products of the roasting process, the cycle of sulphuric acid obtaining and the leaching of zinc calcine were studied. The arsenic contamination of soils in the vicinity of nonferrous metals smelter KCM SA, Plovdiv, Bulgaria as a result of zinc and lead productions has been studied.

  13. Factores asociados al maltrato del adulto mayor de Antioquia, 2012

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    Sara M. Cano

    2015-07-01

    Full Text Available Objetivo: determinar los factores asociados al maltrato del adulto mayor del departamento de Antioquia en el año 2012. Metodología: mediante estudio descriptivo transversal, se caracterizaron los factores demográficos, económicos y de salud mental de la población adulta mayor de Antioquia para el año 2012, con el fin de aportar al análisis de la situación de salud y condiciones de vida del adulto mayor. El estudio se basó en los resultados del instrumento aplicado por la Universidad ces a 4.215 adultos de sesenta años y más de edad, en el cual se indagó sobre percepción de maltrato, funcionamiento cognitivo, nivel de depresión, nivel de ansiedad, apoyo social, escala de recursos sociales, entre otras; los resultados se expandieron a 654.473 adultos del departamento. Resultados: el 72,8% de adultos del departamento son mujeres, 53,7% vive en Medellín, 55% tiene primaria incompleta, 72,9% pertenece a estratos socioeconómicos 1 y 2, 45,1% no registraron ingresos en el último mes, 26,3% tiene riesgo de depresión y 34,4% tiene riesgo de ansiedad, 2,5% reportó haber sufrido descuido, 5,0% necesidades afectivas ignoradas, 1,7% algún caso de agresión física, 0,4% agresión sexual y 1,3%, afirmó haber sufrido maltrato económico. Las variables estrato socioeconómico, tipo de vivienda, etnia, riesgo de depresión, riesgo de ansiedad, riesgo de deterioro cognitivo y red de apoyo fueron las que más ayudaron a explicar la presencia de maltrato. Conclusión: enfrentar este problema requiere de una atención integral a las necesidades de los adultos mayores, participación de todos los sectores de la sociedad y conciencia transgeneracional.

  14. Redes sociales de las mujeres mayores en dos contextos urbanos

    OpenAIRE

    González, M.M. (María)

    2009-01-01

    La enfermera de atención primaria es la responsable de la elaboración de un plan de cuidados adaptado a la población que atendemos,por lo que debe conocer las redes sociales de las personas ya que tener amplias redes puede significar la existencia de personas que ayuden con la medicación, las compras, la limpieza, mejora su seguridad y tienen apoyo en caso de urgencia. Este trabajo investiga esas redes sociales. Analizar las redes sociales de un grupo de mujeres mayores que viven en una i...

  15. Salud y condiciones de trabajo en trabajadores mayores

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    Elena Ordaz Castillo

    2015-09-01

    Full Text Available Introducción: En los últimos años, la población española ha experimentado un crecimiento acelerado de personas mayores. Las previsiones demográficas a corto-medio plazo describen un importante predominio de trabajadores mayores en el mercado laboral. Objetivos: Identificar las diferencias según dos grupos de edad (55 años en la percepción de las condiciones de trabajo y salud de la población trabajadora española. Metodología: Las diferencias entre los dos grupos de edad se analizaron a partir de indicadores de condiciones de trabajo y de salud pertenecientes a la VII Encuesta Nacional de Condiciones de Trabajo del Instituto de Seguridad e Higiene en el Trabajo (VII_ENCT. El análisis consistió en el cálculo de las prevalencias y la odds ratio cruda-ORc y ajustada por sexo con su correspondiente intervalo del confianza al 95%. Resultados: El grupo de trabajadores más jóvenes presentan más riesgo de exposición a seis de los siete indicadores relacionados con las condiciones de trabajo (ruido, vibraciones, carga física, carga mental, autonomía y motivación. No obstante los trabajadores mayores tienen una peor percepción de su estado de salud (ORa= 2,06 [1,75-2,42] y presentan en mayor medida problemas de salud que si bien les conducen a la visita médica más frecuentemente los relacionan menos con su actividad laboral. Conclusiones: A tenor de los resultados, los trabajadores de 55 años y más refieren tener menos quejas respecto a sus condiciones laborales e incluso se sienten más autónomos y motivados. Es el deterioro físico y mental la principal limitación que encuentran estos trabajadores a la hora de ejercer sus tareas. Sería recomendable establecer políticas de promoción de la salud dentro de las empresas para mejorar los indicadores de salud y promover el envejecimiento activo de la población trabajadora española.

  16. La salud de las personas mayores Health among the elderly

    Directory of Open Access Journals (Sweden)

    Elena Gonzalo

    2004-05-01

    Full Text Available Este trabajo explora la existencia de desigualdades de género, de clase y territoriales en la salud de las personas mayores en España, según los datos de la Encuesta Nacional de Salud de 1997, el CMBD de hospitales de 1999, las estadísticas de mortalidad de 1998 y la Encuesta Nacional de Discapacidades de 1999. Se describen las similitudes y diferencias por género y clase social, en las conductas relacionadas con la salud, la salud percibida, los problemas de salud crónicos, la capacidad funcional y el uso de servicios sanitarios. Se comparan, asimismo, las tasas de mortalidad en personas mayores entre las 52 provincias españolas. Las mujeres y los miembros de las clases sociales más desfavorecidas muestran una peor salud percibida. Consumir tabaco o alcohol es más frecuente en los hombres que en las mujeres. La actividad física a esta edad depende, sobre todo, de la actividad cotidiana; los hombres y los miembros de las clases más favorecidas son los que adoptan, en mayor proporción, hábitos sedentarios. Las mujeres presentan problemas de dependencia funcional en mayor medida que los hombres, y entre ellas se observa un claro patrón de desigualdad. Los datos de mortalidad corroboran los hallazgos de otros estudios que sitúan las tasas más altas en el sur de la península.We explore gender, class and geographical inequalities in health of the population aged over 65 years in Spain. We gathered data from the 1997 National Health Survey, 1999 hospital discharge data, 1998 mortality data from vital statistics, and from the 1999 National Survey on Disabilities. Health related behaviors (tobacco and alcohol consumption, eating disorders and physical activity, self-rated health, chronic health problems, functional capacity, and health service utilization are described by gender and social class. Mortality rates among the elderly are compared between the 52 Spanish provinces. Women and members of the lower social classes present worse

  17. Comportamiento de la violencia intrafamiliar en el adulto mayor

    OpenAIRE

    Docampo Santaló, Lourdes; Barreto Lacaba, Rita; Santana Serrano, Caridad

    2009-01-01

    Fundamento: la prevención de la violencia en su marco general y familiar es una prioridad que exige un conocimiento exhaustivo de su magnitud; ya que es observada como un asunto de salud pública por su impacto negativo en la sociedad. Objetivo: caracterizar el comportamiento de la violencia intrafamiliar contra el adulto mayor en el municipio de Nuevitas. Método: se realizó un estudio descriptivo retrospectivo durante el año 2006. De un universo de dos mil ciento seis, setenta y cinco fueron ...

  18. El envejecimiento activo: programa en competencia social con personas mayores

    OpenAIRE

    García Escribano, Rocío

    2014-01-01

    El presente estudio se basa en el aumento de la esperanza de vida y la disminución de la natalidad, lo que conlleva una población más envejecida a la que atender. Se propone un programa sociocultural con personas mayores con la finalidad de promover el envejecimiento activo en este colectivo, favoreciendo su desarrollo social, afectivo, y personal de forma saludable. Para ello, la intervención incluye un programa de formación orientado al entrenamiento en una serie de habilidad...

  19. Metabolismo posprandial en adultos mayores normales de nivel del mar

    Directory of Open Access Journals (Sweden)

    Fausto Garmendia

    2003-06-01

    Full Text Available Objetivo: Determinar las modificaciones normales del metabolismo después de la ingestión de alimentos. Material y Métodos: Se ha estudiado a 33 personas de ambos géneros, adultos mayores, de nivel del mar, tanto en ayunas como después de la ingesta de una mezcla alimenticia consistente en 730 kcal, con 55,4% de grasas, 37,2% de hidratos de carbono y 7,4% de proteínas. Se ha medido el perfil metabólico en ayunas y luego de la ingesta alimentaria, la glucosa, triglicérido (Tg, ácidos grasos no esterificados (AGNE, insulina por métodos convencionales hasta la 6a hora; se ha calculado las concentraciones de colesterol LDL y VLDL utilizando la fórmula de Friedewald; el colesterol no-HDL, mediante la sustracción del valor del colesterol HDL al valor de colesterol total (CT. Resultados: La glicemia se elevó discretamente, regresando a valores basales a la 2a hora; la insulinemia se incrementó durante 4 horas; los triglicéridos comenzaron a elevarse en sangre a partir de la 2a hora y llegaron al máximo a la 4a hora, para luego iniciar el descenso no completo en la 6a hora. Los AGNE disminuyeron a partir de los 30 minutos, llegando al máximo de caída a las 2 horas; luego se apreció un rebote máximo a la 6a hora, inclusive mayor al valor basal. Conclusiones: Estos resultados demuestran que no es suficiente obtener información del metabolismo intermediario en ayunas, sino que el estudio posprandial permite mayor información. Es la primera vez en nuestro país que se obtiene información sobre el metabolismo intermediario en fase posprandial en una muestra de la población normal que se encuentra en una edad de mayor riesgo cardiovascular.

  20. El maltrato a personas mayores atendidas por los Servicios Sociales

    OpenAIRE

    Castilla Mora, María del Rosario

    2015-01-01

    La presente tesis trata sobre el maltrato a las personas mayores (MPM). El MPM es el último tipo de violencia familiar, junto con la violencia de género y el maltrato infantil, por la que los investigadores se han preocupado, siendo hoy día el que tiene menor relevancia, tanto para la sociedad en general como a nivel político. Fue en Gran Bretaña donde los primeros investigadores comenzaron a estudiar el tema, concretamente Baker y Burston, en el año 1975, centrándose en el maltrato fís...

  1. Future electoral impacts of having a female mayor

    Directory of Open Access Journals (Sweden)

    Paulo Arvate

    2017-08-01

    Full Text Available We explore an electoral quasi-experiment where a woman nearly won or lost to a man in a mayoral election. Our data combines municipal Brazilian election results, which occur every four years, with municipal level votes for female and male candidates in state and federal deputy elections, whose districts are larger than the municipalities. Our results show that when voters are exposed to a female leader, the relative number of votes given to female candidates increases. This result depends on the political environment in which the exposure occurs. These effects on the electorate's response tend to be stronger: 01. in municipalities where there is a previous higher proportion of female councilors, and 02. when the mayors have higher education levels. Our results provide evidence that the observed electorate's gender preferences in politics are alterable, but that policy interventions aimed to equalize access will be more effective if they are targeted at underrepresented populations that have the correct skill requirements to perform in leadership positions.

  2. Dependencia funcional y bienestar en personas mayores institucionalizadas

    Directory of Open Access Journals (Sweden)

    María Teresa Rodríguez Díaz

    2014-06-01

    Full Text Available El presente estudio tiene como objetivo evaluar el bienestar emocional de las personas mayores de 60 años en relación al grado de dependencia funcional. Como indicadores del bienestar se evalúan los niveles de depresión (Yesavage y ansiedad (STAI-R, la satisfacción vital (CSV y la ansiedad ante la muerte (DAS. Se ha realizado un estudio descriptivo transversal en un grupo de personas mayores de 60 años (n=103. Los datos se han recogido usando cuestionarios estandarizados. Para el análisis de los datos se han utilizado correlaciones bivariadas entre las principales medidas, análisis univariado (ANOVA y la prueba de Bonferroni para comprobar las diferencias significativas entre los grupos (p< .05. Los resultados indican que se encuentran diferencias significativas entre los grupos de dependencia para la edad, deterioro cognitivo, depresión y ansiedad ante la muerte. En conclusión, se encuentra una relación directa entre el grado de dependencia funcional y el nivel de malestar emocional.

  3. Facebook Usage by Mayors in Central and Southeastern Europe

    Directory of Open Access Journals (Sweden)

    Milica Vučković

    2013-12-01

    Full Text Available The ever increasing rise of social media network users consequently leaves a mark on political communication. While social media tools are already adopted in political marketing, primarily in election campaigning, governments are still new in using social media. The aim of this study is to examine how Facebook is used by city mayors in countries of Central and Southeastern Europe in two months period, from March 1st to April 30th of 2012. Using content analysis we first analyzed status massages in order to see what kind of status messages they post: personal or political. Secondly, we conducted an analysis of comments on the examined statuses, in order to examine if citizens make constructive, cynical, supportive or neutral comments. We examined ten city mayors’ Facebook pages in five countries, Bulgaria, Croatia, Hungary, Macedonia and Slovenia. The results have revealed that city mayors in Central and Southeastern Europe use Facebook almost exclusively for official purposes. Secondly, the analysis of citizens’ comments demonstrates that expressing cynicism on Facebook is not the trend in these countries. The findings further confirm that Facebook is a good platform for gathering supporters, while there were no strong evidence found that it serves as platform for constructive discussion. The paper finally discusses how politician’s status messages can engage a larger number of citizens.

  4. La inflación de los adultos mayores en Colombia

    Directory of Open Access Journals (Sweden)

    Álvaro Montenegro

    2016-12-01

    Full Text Available Este artículo compara el comportamiento de la inflación para el hogar promedio y diversos tipos de hogares de adultos mayores en Colombia. Los resultados indican que, en promedio, los adultos mayores gastan una mayor proporción de su ingreso en vivienda y salud y una menor proporción en educación, y que experimentaron una mayor inflación que la población en general entre diciembre de 2008 y mayo de 2015. Los hogares de adultos mayores más pobres gastan una mayor proporción en vivienda y alimentación, y para estos la inflación fue mayor que para los de adultos mayores de altos ingresos.

  5. Potential ecological risk assessment and predicting zinc accumulation in soils.

    Science.gov (United States)

    Baran, Agnieszka; Wieczorek, Jerzy; Mazurek, Ryszard; Urbański, Krzysztof; Klimkowicz-Pawlas, Agnieszka

    2018-02-01

    The aims of this study were to investigate zinc content in the studied soils; evaluate the efficiency of geostatistics in presenting spatial variability of zinc in the soils; assess bioavailable forms of zinc in the soils and to assess soil-zinc binding ability; and to estimate the potential ecological risk of zinc in soils. The study was conducted in southern Poland, in the Malopolska Province. This area is characterized by a great diversity of geological structures and types of land use and intensity of industrial development. The zinc content was affected by soil factors, and the type of land use (arable lands, grasslands, forests, wastelands). A total of 320 soil samples were characterized in terms of physicochemical properties (texture, pH, organic C content, total and available Zn content). Based on the obtained data, assessment of the ecological risk of zinc was conducted using two methods: potential ecological risk index and hazard quotient. Total Zn content in the soils ranged from 8.27 to 7221 mg kg -1 d.m. Based on the surface semivariograms, the highest variability of zinc in the soils was observed from northwest to southeast. The point sources of Zn contamination were located in the northwestern part of the area, near the mining-metallurgical activity involving processing of zinc and lead ores. These findings were confirmed by the arrangement of semivariogram surfaces and bivariate Moran's correlation coefficients. The content of bioavailable forms of zinc was between 0.05 and 46.19 mg kg -1 d.m. (0.01 mol dm -3 CaCl 2 ), and between 0.03 and 71.54 mg kg -1 d.m. (1 mol dm -3 NH 4 NO 3 ). Forest soils had the highest zinc solubility, followed by arable land, grassland and wasteland. PCA showed that organic C was the key factor to control bioavailability of zinc in the soils. The extreme, very high and medium zinc accumulation was found in 69% of studied soils. There is no ecological risk of zinc to living organisms in the study area, and in 90

  6. Relationship between maternal serum zinc, cord blood zinc and ...

    African Journals Online (AJOL)

    Background: Adequate in utero supply of zinc is essential for optimal fetal growth because of the role of zinc in cellular division, growth and differentiation. Low maternal serum zinc has been reported to be associated with low birth weight and the later is associated with increased morbidity and mortality in newborns.

  7. The study and microstructure analysis of zinc and zinc oxide

    Czech Academy of Sciences Publication Activity Database

    Luptáková, Natália; Pešlová, F.; Kliber, J.

    2015-01-01

    Roč. 54, č. 1 (2015), s. 43-46 ISSN 0543-5846 Grant - others:KEGA(SK) KEGA 007 TnUAD-4/2013 Institutional support: RVO:68081723 Keywords : zinc * production of zinc oxide * microstructure * chemical composition * zinc slag Subject RIV: JG - Metal lurgy Impact factor: 0.959, year: 2014

  8. Zinc biofortification of cereals

    DEFF Research Database (Denmark)

    Palmgren, Michael; Clemens, Stephan; Williams, Lorraine E.

    2008-01-01

    The goal of biofortification is to develop plants that have an increased content of bioavailable nutrients in their edible parts. Cereals serve as the main staple food for a large proportion of the world population but have the shortcoming, from a nutrition perspective, of being low in zinc...... and other essential nutrients. Major bottlenecks in plant biofortification appear to be the root-shoot barrier and - in cereals - the process of grain filling. New findings demonstrate that the root-shoot distribution of zinc is controlled mainly by heavy metal transporting P1B-ATPases and the metal...... tolerance protein (MTP) family. A greater understanding of zinc transport is important to improve crop quality and also to help alleviate accumulation of any toxic metals....

  9. Mayor's Firm Hand over N.Y.C. Schools Sparks New Debate

    Science.gov (United States)

    Archer, Jeff

    2004-01-01

    This article reports a new debate on mayoral control over New York City schools. Mayoral control of the N.Y.C. schools was at the center of renewed debate, after Mayor Michael R. Bloomberg replaced two members of the city's education policymaking board to ensure enough votes for a controversial plan he backed to end social promotion. The shakeup…

  10. Zinc injection in German PWR plants

    International Nuclear Information System (INIS)

    Streit, K.

    2004-01-01

    Operating experience acquired at PWR NNPs shows that zinc injection at low concentrations of 5 ppb is a very effective source term reduction measure. This method does not lead to any operating restrictions or other negative effects on plant systems and components. The nuclear industry has been very successful in reducing radiation exposures within the past two decades. Annual exposures could be significantly decreased and are now at a level of around 1 man-Sv per plant and year. This great success can mainly be attributed to the general commitment of plant operators to maintaining radiation exposures of workers in the controlled access area as low as reasonably achievable (ALARA principle). The ALARA principle, of course, also implies evaluation of the economic benefit of radiation protection measures. Radiation source term reduction has drawn increasing attention of plant operators in recent years. For the new PWRs cobalt-based alloys in the primary system have successively been eliminated already at the design and construction phase within the last decade. Use of wear-resistant cobalt-free substitute materials in combination with the general use of advanced alloys for the steam generator tubing of PWRs resulted in low values for the two most common sources of plant radiation fields, namely 58 Co and 60 Co. Investigations showed that the beneficial effect of zinc can be related to its high affinity for mixed spinel oxide phases, resulting in the following two basic effects: -Zinc is incorporated preferentially into the oxide layer on primary system surfaces and thus reduces pickup of 58 Co and 60 Co and - Zinc can displace cobalt isotopes from existing oxide layers. In German PWRs with Incoloy 800 steam generator tubing material (Ni-content -32%), the observed reductions correspond to a decrease in dose rates of around 10 to 15% per year and thus follow, as predicted, the half-life time of 60 Co. Overall reductions in high radiation areas are now in the range of

  11. El adulto mayor en cirugía general

    Directory of Open Access Journals (Sweden)

    Armando Quintana Proenza

    2001-12-01

    Full Text Available Se realizó un estudio descriptivo y transversal con 249 pacientes de 60 y más años de edad operados en el Servicio de Cirugía General de los hospitales Clinicoquirúrgico Docente "Amalia Simoni" y General Docente "Martín Chang Puga" de la provincia Camagüey en un bienio. Más de la mitad de los pacientes tenían entre 60 y 69 años de edad, con predominio del sexo masculino, en una relación de 1,9:1. El mayor número de cirugía de urgencia se realizó en personas mayores de 70 años. La hernia de la pared abdominal fue el diagnóstico operatorio más frecuente (49 %. La hipertensión arterial constituyó la enfermedad asociada de mayor relevancia. La sepsis predominó entre las complicaciones posoperatorias. La mortalidad global fue de 16,87 %. Más del 70 % de los pacientes pudo haber sido operado en edades más tempranas de la vida de haber recibido una orientación médica adecuada.A descriptive cross-sectional study was conducted among 249 patients aged 60 and over that were operated on at the Service of General Surgery of "Amalia Simoni" Clinical and Surgical Teaching Hospital and "Martín Chang Puga" General Teaching Hospital, in the province of Camagüey, in a biennium. More than half of the patients were aged 60-69, with predominance of males in a ratio 1.9:1.The highest number of emergency surgery was performed in individuals over 70. The hernia of the abdominal wall was the most frequent surgical diagnosis (49 %. Arterial hypertension was the most important associated disease. Sepsis prevailed among the postoperative complications. Total mortality was 16.87 %. More than 70 % of the patients could have been operated when they were younger if they had received an adequate medical guidance.

  12. Photovoltaic cells employing zinc phosphide

    Science.gov (United States)

    Barnett, Allen M.; Catalano, Anthony W.; Dalal, Vikram L.; Masi, James V.; Meakin, John D.; Hall, Robert B.

    1984-01-01

    A photovoltaic cell having a zinc phosphide absorber. The zinc phosphide can be a single or multiple crystal slice or a thin polycrystalline film. The cell can be a Schottky barrier, heterojunction or homojunction device. Methods for synthesizing and crystallizing zinc phosphide are disclosed as well as a method for forming thin films.

  13. Environmental risk limits for zinc

    NARCIS (Netherlands)

    Bodar CWM; SEC

    2007-01-01

    Environmental Riks Limits (ERLs) were derived for zinc. ERLs serve as advisory values to set environmental quality standards in the Netherlands. The ERLs for zinc closely follow the outcomes of earlier discussions on zinc within the Water Framework Directive and EC Regulation 793/93. The ERLs

  14. Environmental risk limits for zinc

    NARCIS (Netherlands)

    Bodar CWM; SEC

    2007-01-01

    Environmental Riks Limits (ERLs) were derived for zinc. ERLs serve as advisory values to set environmental quality standards in the Netherlands. The ERLs for zinc closely follow the outcomes of earlier discussions on zinc within the Water Framework Directive and EC Regulation 793/93. The ERLs refer

  15. Vida y salud con la gimnasia para adultos mayores

    Directory of Open Access Journals (Sweden)

    MSc. María Magdalena Rosado Álvarez

    2018-01-01

    Full Text Available El objetivo del trabajo es realizar una revisión metódica de las normas vigentes en la constitución de la República del Ecuador, el impacto de la gimnasia para disfrutar una vida saludable los adultos mayores el periodo mayo a septiembre de 2016. La investigación tuvo un enfoque cuantitativo, de alcance explicativo, con diseño experimental de tipo pre experimental con corte longitudinal, a través de una muestra de 20 pacientes, donde se implementó métodos para la recolección de datos demostrando su consistencia, tales como: historia clínica, encuesta, test de Tinetti, prueba de Romberg. Los resultados reflejan mejoría a la marcha y equilibrio pasando de un 15% a 10% de la población

  16. Actitud y miedo ante la muerte en adultos mayores

    Directory of Open Access Journals (Sweden)

    Ana Fernanda Uribe Rodríguez

    2007-01-01

    Full Text Available A través de los años el tema de la muerte se ha conceptualizado de diversas maneras. En la actualidad las personas evitan hablar del tema y se observa conductas evitativas, de miedo y ansiedad. El presente artículo tiene como objetivo evaluar la actitud y miedo ante la muerte en una muestra de 170 adultos mayores ( X :71,02; DT=5,946 de la ciudad de Cali-Colombia por medio del Perfil Revisado de Actitudes hacia la Muerte (PAM-R y la Escala de Collet-Lester (1969; se tuvo en cuenta las variables sexo, religión y estrato socioeconómico. Los resultados muestran diferencias significativas en función del sexo en las escalas de miedo a la propia muerte, evitación de la muerte, aceptación de acercamiento. Con relación al estrato socioeconómico se encontraron diferencias significativas en las escalas de miedo a la muerte y aceptación de acercamiento y en función de la religión sólo hay diferencias significativas en la evitación a la muerte. Se concluye la importancia de contribuir desde la psicología, al mejoramiento en los procesos de adaptación a los duelos y disminuir la presencia de duelos patológicos que se generan ante situaciones inesperadas y mal elaboradas en este caso, en los adultos mayores.

  17. Un estudio exploratorio de capacidades emocionales en adultos mayores

    Directory of Open Access Journals (Sweden)

    Zoe S. Bello Dávila

    2012-01-01

    Full Text Available Abstract The study of the emotional world of the elderly is a fundamental requisite for guaranteeing the well-being and health of this group. The objective of this research paper was to characterize a group of elderly people according to their motional capabilities. The group consisted of 122 elderly persons: 107 female, 15 male. All attendants participated in a “Círculo de Abuelos” (Circle of Grandparents. The study was descriptive, it sought to gather information about the responses of older adults in situations of emotional content by completing a questionnaire. The results provided a profile of capacities where areas of strength and weakness are clearly distinguished. Selfconfidence and the possibility of fulfilling projects are among the strengths while the weaknesses are found in interpersonal or intrapersonal managing of emotions. These results have led to a better understanding of the emotional world of the elderly and guide future educational activities. Resumen El estudio del mundo emocional de los adultos mayores es un requisito fundamental para garantizar el estado de bienestar y salud de los mismos. El presente artículo de investigación se fijó como objetivo caracterizar a un grupo de ancianos, en función de sus capacidades emocionales. Los participantes fueron 122 ancianos, en concreto 107 mujeres y 15 hombres, que asisten a un “Círculo de Abuelos”. El estudio fue de tipo descriptivo, pues pretendió recoger información acerca de las respuestas de los adultos mayores ante situaciones de contenido emocional que se exploran por medio de un cuestionario elaborado al efecto. Los resultados ofrecen un perfil de capacidades en que la autoconfianza y la posibilidad de elaborar proyectos se erigen como fortalezas, mientras que las debilidades se expresan en las dificultades para el manejo emocional tanto a nivel intra como interpersonal. Estos resultados han permitido lograr una mejor comprensión del mundo emocional del

  18. Estudio descriptivo de algunas variables emocionales en las personas mayores

    Directory of Open Access Journals (Sweden)

    Igone Etxeberria

    2016-08-01

    Full Text Available Se analizó el funcionamiento emocional (afecto positivo y negativo, satisfacción con la vida, soledad y estrategias de regulación de las personas centenarias en comparación con el de personas de menor edad (65-74, 75-84 y 85-94 años. Participaron en el estudio 257 personas mayores sin deterioro cognitivo y sin dependencia para las Actividades de la Vida Diaria (AVD. Los resultados revelaron que, en las personas centenarias, se producía una disminución de la afectividad positiva en comparación con los grupos de 65 a 74 años y de 75 a 84 años, pero no así con el de 85 a 94 años. Además, presentaban menor afecto negativo y más satisfacción con la vida (en comparación con el grupo de 65 a 74 años, al tiempo que manifestaban sentirse más solas (en comparación con los grupos de 65 a 74 años y de 75 a 84 años. Con respecto a las estrategias de regulación, en general, las personas centenarias utilizan en menor medida las estrategias proactivas y la solución de problemas y en mayor medida las pasivas, al menos en la regulación de la tristeza. En conclusión, a pesar de experimentar menos afecto positivo y más soledad se produce cierta disminución en el afecto negativo, e incluso cierto aumento de la satisfacción con la vida. En lo que respecta a la regulación emocional, las personas centenarias utilizan menos las estrategias proactivas y más las pasivas (tristeza.

  19. Bioaccumulation of zinc in foodstuffs by nuclear and related techniques

    International Nuclear Information System (INIS)

    Diaz Rizo, O.; Olivares Reumont, S.; Lima Cazorla, L.; Gelen Rudnikas, A.; D'Alessandro Rodriguez, K.; Arado Lopez, J. O.; Denis Alpizar, O.; Diaz Arado, O.; Viguri Fuente, J.

    2011-01-01

    The bioaccumulation of zinc in regular consumption foodstuff (sugar, rice, some vegetables, roots and shellfishes) in Cuba is reported. Zinc content in food samples and its corresponding soils or sediments are determined by Instrumental Neutron Activation analysis (INAA), X-Ray Fluorescence analysis (XRF), inductively coupled plasma emission spectrometry (ICP-AES) and Atomic Absorption spectrometry (AES). The obtained results show rice as the major Zn bioaccumulator of the studied products and the main Zn source in Cuban human diet. (Author)

  20. Efficacy of zinc against common cold viruses: an overview.

    Science.gov (United States)

    Hulisz, Darrell

    2004-01-01

    To review the laboratory and clinical evidence of the medicinal value of zinc for the treatment of the common cold. Published articles identified through Medline (1980-2003) using the search terms zinc, rhinovirus, and other pertinent subject headings. Additional sources were identified from the bibliographies of the retrieved articles. By the author. By the author. Human rhinoviruses, by attaching to the nasal epithelium via the intracellular adhesion molecule-1 (ICAM-1) receptor, cause most colds. Ionic zinc, based on its electrical charge, also has an affinity for ICAM-1 receptor sites and may exert an antiviral effect by attaching to the ICAM-1 receptors in the rhinovirus structure and nasal epithelial cells. Clinical tests of zinc for treatment of common colds have been inconsistent, primarily because of study design, blinding, and lozenge contents. Early formulations of lozenges also were unpalatable. In three trials with similar study designs, methodologies, and efficacy assessments, zinc effectively and significantly shortened the duration of the common cold when it was administered within 24 hours of the onset of symptoms. Recent reports of trials with zinc gluconate administered as a nasal gel have supported these findings; in addition, they have shown that treatment with zinc nasal gel is effective in reducing the duration and severity of common cold symptoms in patients with established illness. Clinical trial data support the value of zinc in reducing the duration and severity of symptoms of the common cold when administered within 24 hours of the onset of common cold symptoms. Additional clinical and laboratory evaluations are warranted to further define the role of ionic zinc for the prevention and treatment of the common cold and to elucidate the biochemical mechanisms through which zinc exerts its symptom-relieving effects.

  1. Avoiding short circuits from zinc metal dendrites in anode by backside-plating configuration

    Science.gov (United States)

    Higashi, Shougo; Lee, Seok Woo; Lee, Jang Soo; Takechi, Kensuke; Cui, Yi

    2016-01-01

    Portable power sources and grid-scale storage both require batteries combining high energy density and low cost. Zinc metal battery systems are attractive due to the low cost of zinc and its high charge-storage capacity. However, under repeated plating and stripping, zinc metal anodes undergo a well-known problem, zinc dendrite formation, causing internal shorting. Here we show a backside-plating configuration that enables long-term cycling of zinc metal batteries without shorting. We demonstrate 800 stable cycles of nickel–zinc batteries with good power rate (20 mA cm−2, 20 C rate for our anodes). Such a backside-plating method can be applied to not only zinc metal systems but also other metal-based electrodes suffering from internal short circuits. PMID:27263471

  2. Percepción del estudiante de medicina de una universidad pública acerca del docente adulto mayor y del adulto mayor en general

    Directory of Open Access Journals (Sweden)

    Martha Martina

    2014-07-01

    Full Text Available Introducción: La mayoría de los estudios disponibles muestran que las imágenes que construyen los jóvenes sobre la vejez, en general, se asocian a una valoración negativa de esta etapa de la vida. Objetivos: Analizar la percepción de los estudiantes de Medicina Humana de la UNMSM acerca de la vejez, así como la existencia o no de estereotipos negativos acerca de la vejez y del docente adulto mayor. Diseño: Estudio transversal. Institución: Facultad de Medicina, Universidad Nacional Mayor de San Marcos, Lima, Perú. Participantes: Estudiantes del primero, tercero y quinto año de la Escuela Académico Profesional de Medicina Humana. Intervenciones: Aplicación de una escala de diferencial semántico para medir la percepción de los estudiantes mediante un cuestionario autoadministrado. Principales medidas de resultados: De una muestra de 319 estudiantes, 54,2% fue del sexo masculino y el promedio de edad 21,7±2,6 años; 90,3% tuvo cercanía con profesores mayores de 70 años. Los alumnos del quinto año otorgaron menores puntuaciones a los docentes adultos mayores (p=0,003 y a los adultos mayores en general (p=0,045. Los estudiantes que en su familia convivían con personas mayores de 70 años tuvieron una percepción más positiva sobre los adultos mayores en general (p=0,037. Respecto a la percepción de los estudiantes acerca del docente adulto mayor destacaron cinco características que superaron el 70% del puntaje, tipificándolo como seguro de sí mismo (78%, organizado (73,9%, interesado en el aprendizaje del estudiante (72,8%, planificador (72,6% y emocionalmente estable (71,8%. Respecto al adulto mayor, los puntajes no superaron el 70%, y en general lo tipificaron como tratable, sociable y hábil. Conclusiones: Los estudiantes de medicina mostraron una percepción positiva hacia el docente adulto mayor y sobre el adulto mayor en general. Existieron diferencias estadísticamente significativas según el año de estudios. Los

  3. Zinc in multiple sclerosis

    DEFF Research Database (Denmark)

    Bredholt, Mikkel; Fredriksen, Jette Lautrup

    2016-01-01

    In the last 35 years, zinc (Zn) has been examined for its potential role in the disease multiple sclerosis (MS). This review gives an overview of the possible role of Zn in the pathogenesis of MS as well as a meta-analysis of studies having measured Zn in serum or plasma in patients with MS...

  4. Impact of residual elements on zinc quality in the production of zinc oxide

    Directory of Open Access Journals (Sweden)

    N. Luptáková

    2016-07-01

    Full Text Available The paper is focused on zinc oxide manufacturing process. The present work deals with the character and morphology of the input material for the production of ZnO by the indirect pyrometallurgical process. Undesirable phases in the feedstock can be identified through profound recognition of the source material and the nature of its microstructure. If these compounds diffuse into the lining during thermal processes, they become the cause of stress in metallurgical ceramics. The emergence of these chemical reactions may subsequently affect the entire metallurgical zinc smelting process. The results obtained by analysis are used to minimize waste - zinc slag and to eliminate the conditions which enable the formation of the undesired product, thereby increasing the productivity of the ZnO production.

  5. Environmental exposure of road borders to zinc

    Energy Technology Data Exchange (ETDEWEB)

    Blok, J. [Royal Haskoning, P.O. Box 151, 6500 Ad Nijmegen (Netherlands)]. E-mail: Han.Blok@royalhaskoning.com

    2005-09-15

    The emissions of zinc along roads originating from tyre wear, corrosion of safety fence and other traffic-related sources have been quantified and validated by measured long-term loads in road run-off and airborne solids (drift) for 29 published case studies. The distribution pattern over the road border at various distances from the edge of the paved surface is assessed on the basis of 38 published case studies with measured concentrations in soil. For the impact assessment, the road border is differentiated into a zone that is part of the 'technosphere' and the 'target zone' beyond that technosphere that can be considered as part of the receiving environment. The 'technosphere' of the road includes the central reservation, the hard and the soft shoulder or, if one or both shoulders are not present, the so-called obstacle 'free zone' that is defined by road engineers. Pollution within the technosphere may require appropriate management of solid disposal and isolation from groundwater to prevent further distribution of pollutants to the environment. In the target zone along regional roads, the zinc load is about 4 mg/m{sup 2} year and this is of the same order of magnitude as that of atmospheric deposition in areas beyond the influence of roads (background). In the target zone along highways, the zinc load is increased in comparison to the background deposition. The average load of about 38 mg/m{sup 2} year is similar to that in fertilised agricultural land. Because most of the emitted zinc stays in the technosphere, the total amount entering this target zone along highways is limited. From the 140 tons of zinc per year that is released from tyre wear in The Netherlands, 64 tons is emitted in the urban area, 6.5 tons reaches to the target zones of all roads and only 1.1 tons of zinc will enter the target zone along highways. This amount will be further decreased by the application of porous asphalt in the near future. The

  6. Environmental exposure of road borders to zinc

    International Nuclear Information System (INIS)

    Blok, J.

    2005-01-01

    The emissions of zinc along roads originating from tyre wear, corrosion of safety fence and other traffic-related sources have been quantified and validated by measured long-term loads in road run-off and airborne solids (drift) for 29 published case studies. The distribution pattern over the road border at various distances from the edge of the paved surface is assessed on the basis of 38 published case studies with measured concentrations in soil. For the impact assessment, the road border is differentiated into a zone that is part of the 'technosphere' and the 'target zone' beyond that technosphere that can be considered as part of the receiving environment. The 'technosphere' of the road includes the central reservation, the hard and the soft shoulder or, if one or both shoulders are not present, the so-called obstacle 'free zone' that is defined by road engineers. Pollution within the technosphere may require appropriate management of solid disposal and isolation from groundwater to prevent further distribution of pollutants to the environment. In the target zone along regional roads, the zinc load is about 4 mg/m 2 year and this is of the same order of magnitude as that of atmospheric deposition in areas beyond the influence of roads (background). In the target zone along highways, the zinc load is increased in comparison to the background deposition. The average load of about 38 mg/m 2 year is similar to that in fertilised agricultural land. Because most of the emitted zinc stays in the technosphere, the total amount entering this target zone along highways is limited. From the 140 tons of zinc per year that is released from tyre wear in The Netherlands, 64 tons is emitted in the urban area, 6.5 tons reaches to the target zones of all roads and only 1.1 tons of zinc will enter the target zone along highways. This amount will be further decreased by the application of porous asphalt in the near future. The emission from safety fence corrosion does not enter

  7. Repercusión de la formación en adultos mayores: El caso del Aula Abierta de Mayores

    Directory of Open Access Journals (Sweden)

    José Luis Rodríguez Díez

    2015-05-01

    Full Text Available En esta Tesis se hace hincapié en la importancia del envejecimiento activo y la influencia del aprendizaje a lo largo de la vida en el mismo. La investigación que hemos realizado analiza en qué medida la asistencia al programa universitario para mayores denominado “Aula Abierta de Mayores” y ofertado por la Universidad Pablo de Olavide de Sevilla (España, influye en una visión más satisfactoria de la vida, su capacidad de aprendizaje y la modificación de hábitos familiares. Se ha utilizado un método mixto. Se ha realizado una encuesta a 105 sujetos y los resultados demuestran cómo la asistencia a este programa de formación les ha cambiado la vida en cada una de las variables estudiadas.

  8. Zinc status and its association with the health of adolescents: a review of studies in India

    Directory of Open Access Journals (Sweden)

    Rama Kawade

    2012-04-01

    Full Text Available Background: Zinc is important in adolescence because of its role in growth and sexual maturation. Adolescents from developing countries such as India may be at high risk of zinc deficiency because of unwholesome food habits and poor bioavailability of zinc from plant-based diets. Objectives: (1 to study zinc status and its association with profile of other micronutrients, (2 to construct a simple tool in the form of Adolescent Micronutrient Quality Index (AMQI to assess quality of diets of the girls and (3 to examine the effect of zinc supplement on health of adolescent girls. Methods: Girls (10–16 years from two secondary schools of Pune, Maharashtra state, in Western India were enrolled in a cross-sectional study (n = 630. Data were collected on dietary intake, cognitive performance, taste acuity, haemoglobin, erythrocyte zinc and plasma levels of zinc, vitamin C, β-carotene and retinol. AMQI was developed using age–sex-specific Indian dietary guidelines and healthy foods and habits described in the recent US dietary guidelines. Zinc-rich recipes were developed considering habitual diets of the girls and vegetarian sources of zinc. An intervention trial (n = 180 was conducted to assess the effect of zinc-rich dietary supplements and ayurvedic zinc (Jasad supplementation. Results: Prevalence of micronutrient deficiencies was high in these girls. Poor cognitive performance was seen in half of the girls, and salt taste perception was affected in 45%. AMQI was correlated with nutrient intakes and blood micronutrient levels (p < 0.01, indicating the potential of AMQI to measure micronutrient quality of diets of adolescent girls. Results of the intervention trial indicated that supplementation of zinc-rich recipes vis-a-vis ayurvedic Jasad zinc has the potential to improve plasma zinc status, cognitive performance and taste acuity in adolescent girls. Conclusion: Review of the studies on Indian adolescent girls demonstrates the necessity of

  9. Obtention of zinc polymethacrylate via free radicals induced by gamma radiation; Obtencion del polimetacrilato de zinc via radicales libres inducidos por radiacion gamma

    Energy Technology Data Exchange (ETDEWEB)

    Urena N, F.; Flores E, J. [Departamento de Fisica, Instituto Nacional de Investigaciones Nucleares, C.P. 52045 Estado de Mexico (Mexico)

    2000-07-01

    The objective of this work was to synthesise the monomer of zinc methacrylate and subsequently to carry out the polymerization reaction with the purpose to obtain the compound desired, the zinc polymethacrylate. For this it was used a gamma radiation source, {sup 60} Co, as initiator of the polymerization reaction. (Author)

  10. Effect of individual components of soy formula and cows milk formula on zinc bioavailability

    International Nuclear Information System (INIS)

    Loennerdal, B.; Cederblad, A.; Davidsson, L.; Sandstroem, B.

    1984-01-01

    Zinc absorption from human milk, cows milk formulas, and soy formulas was studied in human adults by a radioisotope technique using 65 Zn and whole body counting. Individual dietary components were investigated for effects on zinc absorption. Phytate was found to have a strong inhibitory effect on zinc absorption; addition of phytate to cows milk formula (yielding a phytate concentration similar to that of soy formula) resulted in a decrease in zinc absorption from 31 to 16% similar to the absorption for soy formula (14%). Carbohydrate source, calcium, and zinc levels of the diet did not affect zinc absorption significantly. Iron supplementation of cows milk formula decreased zinc absorption from 24 to 18% although this decrease was not found to be significant (p less than 0.1). Absorption of zinc from a whey-adjusted cows milk formula was higher (31%) than from a nonmodified cows milk formula (22%). Increasing the zinc supplementation level in cows milk formula but not in soy formula increased zinc absorption to approximate that from breast milk. It is suggested that reduction of phytate content of soy formula may be a more effective avenue of modification than increased level of zinc supplementation

  11. Beneficios percibidos por adultos mayores incorporados al ejercicio

    Directory of Open Access Journals (Sweden)

    René Barrios Duarte

    2003-04-01

    Full Text Available El propósito del trabajo es conocer los beneficios que perciben los adultos mayores del sexo femenino, con larga permanencia en el ejercicio, y las relaciones que se establecen entre estos y las variables edad, nivel cultural, tiempo de permanencia y ocupación anterior. Se tomó una muestra de 75 personas pertenecientes a 5 círculos de abuelos de Ciudad de La Habana, con edades entre 56 y 90 años, a los cuales se les aplicó un cuestionario de datos sociodemográficos y una entrevista. Los beneficios percibidos se agruparon en 4 categorías principales: salud, aptitud, psicológicos y sociales. No se encontró relación de dependencia con ninguna de las variables analizadas, aunque sí se encontraron diferencias en categorías específicas. El estudio detalla los beneficios que se pueden percibir con la práctica sistemática en programas destinados al adulto mayor, así como su carácter multidimensional, físico, psicológico y social. Se confirma la importancia del ejercicio y se ofrecen razones para su fomento.The objective of the paper is to find out the benefits that older females receive from practicing exercises for a long time and the relations that are established between these benefits and the variables age, educational level, length of practice and former occupation. A sample of 75 persons from 5 grandfather´s clubs in the City of Havana, aged 56-60 years was administered a socio-demographic questionnaire and an interview. Received benefits were grouped into 4 main categories: health, aptitude, psychological and social. There was no dependence relation with any of the analyzed variables, although differences were found in specific categories. The study detailed the benefits that may be received from systematic physical exercising in programs devoted to older people as well as their multidimensional, physical, psychological and social character. The paper confirmed the importance of exercising and provided reasons for encouraging

  12. Capacidad funcional y salud: orientaciones para cuidar al adulto mayor

    Directory of Open Access Journals (Sweden)

    CLARA INÉS GIRALDO M

    2008-07-01

    Full Text Available Objetivo: valorar la salud y la capacidad funcional de ancianos con dependencia funcional para el autocuidado, como elementos para orientar el cuidado de enfermería y el cuidado familiar en casa. Metodología: estudio descriptivo transversal en 40 personas de 65 y más años con dependencia funcional, cuidados por familiar, en Envigado Colombia; muestreo por conveniencia. Valoración de la capacidad funcional con el índice de Katz y la escala de Lawton y Brody, ajustados según grupo de Neurociencias, Universidad de Antioquia. Hallazgos: población entre 67 y 98 años, edad promedio 84,08 años; 82,5% mujeres. Sistemas orgánicos más afectados: cardiovascular, osteomuscular y neurológico; entre 47,5% y 27,5% de los ancianos los tenían comprometidos. Se identificaron dos comportamientos: los hombres, y las personas de edad más avanzada, con mayores grados de dependencia en las actividades básicas e instrumentales; no se determinó asociación estadística por el pequeño tamaño muestral. Las actividades básicas estaban afectadas así: entre el 67,5% y el 55% de los ancianos requería ayuda; y las actividades instrumentales estuvieron comprometidas: entre el 95% y el 75% de los ancianos son totalmente dependientes en ellas. Conclusiones: Enfermería ha de considerar la valoración de la capacidad funcional articulada al estado de salud integral de los ancianos, para orientar su cuidado y apoyar a los cuida-dores familiares. Esto además previene dependencias de cuidado innecesarias que estarían en contra de las aspiraciones del adulto mayor como individuo autónomo e independiente. Es tarea de profesionales en enfermería capacitar a cuidadores familiares sobre valoración de la capacidad funcional.

  13. Paleointensities on 8 ka obsidian from Mayor Island, New Zealand

    Directory of Open Access Journals (Sweden)

    A. Ferk

    2011-11-01

    Full Text Available The 8 ka BP (6050 BCE pantelleritic obsidian flow on Mayor Island, Bay of Plenty, New Zealand, has been investigated using 30 samples from two sites. Due to a very high paramagnetic/ferromagnetic ratio, it was not possible to determine the remanence carriers. This is despite the fact that the samples were studied intensively at low, room, and high temperatures. We infer that a stable remanence within the samples is carried by single- or close to single-domain particles. Experiments to determine the anisotropy of thermoremanence tensor and the dependency on cooling rate were hampered due to alteration resulting from the repeated heating of the samples to temperatures just below the glass transition. Nonetheless, a well-defined mean paleointensity of 57.0 ± 1.0 μT, based on individual high quality paleointensity determinations, was obtained. This field value compares very well to a paleointensity of 58.1 ± 2.9 μT, which Tanaka et al. (2009 obtained for 5500 BCE at a site 100 km distant. Agreement with geomagnetic field models, however, is poor. Thus, gathering more high-quality paleointensity data for the Pacific region and for the southern hemisphere in general to better constrain global field models is very important.

  14. El entorno residencial de los mayores en Madrid

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    Fernández-Mayoralas Fernández, Gloria

    2002-12-01

    Full Text Available The aim of this paper is to study the residential environment and its perception by the elderly people ageing in place in Madrid, to obtain a better knowledge of the elements to modify in order to increase their satisfaction. The Censo de Población y Vivienda (1991 and the Survey Ageing in Place (1998 are used. In general terms, old people live in old houses, as owners, not crowded but with lack of facilities. These people have been living for a long time in the same neighbourhood, an environment affected by the problems characteristic of big cities, and are integrated in the neighbour by means of activities requiring not to much physical or financial effort. Residential lacks affect mainly to that groups with social and economic vulnerability: female, lower income and educational level, worse health status,... So, two out ten aged people would move mainly due to the negative conditions of habitability, adaptation and facilities. Moreover, reasons for not moving are related to the force of habit, the memories, or consequence of age, bad health or less resources.

    [es] El entorno residencial de los mayores en Madrid. El objetivo de este artículo es estudiar el ámbito residencial de los mayores que envejecen en su casa y la percepción que tienen sobre este medio, para obtener un mejor conocimiento de los aspectos que deberían modificarse a fin de incrementar su satisfacción. Las fuentes utilizadas son el Censo de Población y Vivienda de 1991 y la Encuesta Envejecer en Casa de 1998. A grandes rasgos, los viejos madrileños viven en casas viejas, de las que son propietarios, sin problemas de hacinamiento pero con carencias dotacionales. Durante la mayor parte de su vida adulta han residido en el mismo barrio, un entorno que actualmente está afectado por los problemas propios de las grandes ciudades, y en el que se integran socialmente mediante actividades que no requieren demasiado esfuerzo físico o monetario. Las deficiencias

  15. Maltrato institucional a adultos mayores Institutional elder abuse

    Directory of Open Access Journals (Sweden)

    Miriam Rubio Acuña

    2012-12-01

    Full Text Available El maltrato institucional se refiere a cualquier forma de abuso que ocurre en servicios dirigidos a los ancianos. Esta revisión bibliográfica muestra que el maltrato se presenta con mayor frecuencia en residencias de larga estadía y el tipo más frecuente es la negligencia. Los factores asociados son los que tienen relación con el residente y con el ambiente. Las principales estrategias son invertir recursos sociosanitarios, sensibilizar a la población respecto al maltrato de los ancianos, considerar las necesidades de estos, fortalecer la formación de pregrado de los profesionales de salud en este ámbito y realizar educación continua. El maltrato es un problema social que debe ser abordado de manera integral.Institutional abuse refers to any form of abuse that occurs in services for the elderly. This literature review indicates that abuse occurs more frequently in nursing homes and the most frequent type of neglect. The factors that may relate to the relationship with the resident and the environment. The main strategies relate to social and health invest resources, raising awareness about the abuse of the elderly, consider their needs, strengthen undergraduate education of health professionals in this field and make continuing education. Abuse is a social problem so this must be addressed holistically.

  16. Interaction Between Yeasts and Zinc

    Science.gov (United States)

    Nicola, Raffaele De; Walker, Graeme

    Zinc is an essential trace element in biological systems. For example, it acts as a cellular membrane stabiliser, plays a critical role in gene expression and genome modification and activates nearly 300 enzymes, including alcohol dehydrogenase. The present chapter will be focused on the influence of zinc on cell physiology of industrial yeast strains of Saccharomyces cerevisiae, with special regard to the uptake and subsequent utilisation of this metal. Zinc uptake by yeast is metabolism-dependent, with most of the available zinc translocated very quickly into the vacuole. At cell division, zinc is distributed from mother to daughter cells and this effectively lowers the individual cellular zinc concentration, which may become zinc depleted at the onset of the fermentation. Zinc influences yeast fermentative performance and examples will be provided relating to brewing and wine fermentations. Industrial yeasts are subjected to several stresses that may impair fermentation performance. Such stresses may also impact on yeast cell zinc homeostasis. This chapter will discuss the practical implications for the correct management of zinc bioavailability for yeast-based biotechnologies aimed at improving yeast growth, viability, fermentation performance and resistance to environmental stresses

  17. Does the oral zinc tolerance test measure zinc absorption

    Energy Technology Data Exchange (ETDEWEB)

    Valberg, L.S.; Flanagan, P.R.; Brennan, J.; Chamberlain, M.J.

    1985-01-01

    Increases in plasma zinc concentration were compared with radiozinc absorption after oral test doses. Ten healthy, fasting subjects were each given 385 mumol zinc chloride (25 mg Zn) labelled with 0.5 muCi /sup 65/ZnCl/sub 2/ and a non-absorbed marker, /sup 51/CrCl/sub 3/, dissolved in 100 ml of water; another 10 persons were given 354 mumol zinc chloride and 125 g of minced turkey containing 31 mumol zinc also labelled with /sup 65/Zn and /sup 51/Cr. Measurements were made of plasma zinc concentration at hourly intervals for 5 hours, radiozinc absorption by stool counting of unabsorbed radioactivity 12-36 hours later, and radiozinc retention by whole body counting at 7 days. The mean percentage of radiozinc absorbed and retained in the body from the two test meals was found to be identical (42%). In contrast the increased area under the plasma zinc curve up to 5 hours after the turkey meal, 28 +/- 9 mumol/L (mean +/- SD) was significantly less than that for zinc chloride alone, 47 +/- 15 mumol/L, p less than 0.005. Despite this difference, a good correlation was found between the area under the plasma zinc curve and /sup 65/Zn absorption in individual subjects after each meal. The discrepancy between the results of zinc absorption derived from the plasma zinc curve and /sup 65/Zn absorption for the liquid and solid test meals was most likely explained by binding of zinc to food and delayed gastric emptying of the solid meal. With a test meal of turkey meat at least this dampened the plasma appearance of zinc but did not affect its overall absorption.

  18. Does the oral zinc tolerance test measure zinc absorption

    International Nuclear Information System (INIS)

    Valberg, L.S.; Flanagan, P.R.; Brennan, J.; Chamberlain, M.J.

    1985-01-01

    Increases in plasma zinc concentration were compared with radiozinc absorption after oral test doses. Ten healthy, fasting subjects were each given 385 mumol zinc chloride (25 mg Zn) labelled with 0.5 muCi 65 ZnCl 2 and a non-absorbed marker, 51 CrCl 3 , dissolved in 100 ml of water; another 10 persons were given 354 mumol zinc chloride and 125 g of minced turkey containing 31 mumol zinc also labelled with 65 Zn and 51 Cr. Measurements were made of plasma zinc concentration at hourly intervals for 5 hours, radiozinc absorption by stool counting of unabsorbed radioactivity 12-36 hours later, and radiozinc retention by whole body counting at 7 days. The mean percentage of radiozinc absorbed and retained in the body from the two test meals was found to be identical (42%). In contrast the increased area under the plasma zinc curve up to 5 hours after the turkey meal, 28 +/- 9 mumol/L (mean +/- SD) was significantly less than that for zinc chloride alone, 47 +/- 15 mumol/L, p less than 0.005. Despite this difference, a good correlation was found between the area under the plasma zinc curve and 65 Zn absorption in individual subjects after each meal. The discrepancy between the results of zinc absorption derived from the plasma zinc curve and 65 Zn absorption for the liquid and solid test meals was most likely explained by binding of zinc to food and delayed gastric emptying of the solid meal. With a test meal of turkey meat at least this dampened the plasma appearance of zinc but did not affect its overall absorption

  19. Work within the coordinated programme on isotope-aided micronutrient studies in rice production with special reference to zinc deficiency

    International Nuclear Information System (INIS)

    Rahman, L.

    1980-04-01

    A series of pot and field experiments with flooded rice were carried out on contrasting soil types of Bangladesh to study the zinc status of soils, evaluate chemical methods for extracting zinc from soils in terms of ability to identify zinc deficiency, 65 Zn-aided experiments including the residual effect of zinc fertilizers to evaluate the efficiency of zinc sources and methods of zinc application to rice. The results show that (1) the available zinc extracted successively with 0.1 N HCl showed a significant, positive correlation between available soil zinc and plant zinc content; (2) among rice soils of Bangladesh the zinc content from critical limits to adequate levels in the south and south-eastern part of the country was determined. In the northern part of the country, deficiency problems were clearly seen; (3) the rates and methods of zinc application under experimental conditions influences the yield parameters differently and may show an apparent or significant change; (4) 5-7 kg Zn/ha as zinc sulfate were introduced as optimal rates for the soils under experiments; (5) significant yield increases due to the residual effect of zinc fertilizer were obtained on the experiments under dry season conditions but not under wet conditions

  20. Zinc bioavailability from legumes in non-human primates (Macaca fascicularis)

    International Nuclear Information System (INIS)

    Sockalingam, S.

    1984-01-01

    Zinc bioavailability from legumes in non-human primates (M. Fascicularis) was studied by: (1) determining zinc requirements of adolescent monkeys, (2) validating the use of extrinsic zinc label in peas, (3) validating the blood appearance and disappearance technique, and (4) measuring zinc absorption and endogenous excretion from control and legume diets. Ten monkeys were assigned to the control (CG) and legume groups (LG) based on their initial body weights and plasma zinc concentrations. Zinc salt or legumes served as the source of zinc for CG and LG, respectively. The animals were adapted for three weeks to 2.23, 5.70, 11.67, 16.70 and 30.00 ppm dietary zinc for the requirement and bioavailability experiments and 5.70 ppm dietary zinc for the extrinsic labeling study and the blood appearance and disappearance study. Zinc requirement was determined using the following criteria: body weight, clinical signs and plasma, leukocyte and erythrocyte zinc concentrations. The use of the extrinsic label was validated by comparing percent absorption of 65 Zn (salt) and intrinsically labeled 65 Zn from peas. The blood appearance and disappearance of orally administered /sup 69m/Zn (CG) and 65 Zn(LG) and intravenously administered 65 Zn was determined serially in blood over an eight hour period. Zinc absorption and regulation in the CG and LG was determined by the fecal balance method and endogenous excretion of intravenously administered 65 Zn. The zinc requirement for adolescent M. Fascicularis was between 11.67 and 16.70 ppm dietary zinc per day

  1. Estimating the global prevalence of inadequate zinc intake from national food balance sheets: effects of methodological assumptions.

    Directory of Open Access Journals (Sweden)

    K Ryan Wessells

    Full Text Available The prevalence of inadequate zinc intake in a population can be estimated by comparing the zinc content of the food supply with the population's theoretical requirement for zinc. However, assumptions regarding the nutrient composition of foods, zinc requirements, and zinc absorption may affect prevalence estimates. These analyses were conducted to: (1 evaluate the effect of varying methodological assumptions on country-specific estimates of the prevalence of dietary zinc inadequacy and (2 generate a model considered to provide the best estimates.National food balance data were obtained from the Food and Agriculture Organization of the United Nations. Zinc and phytate contents of these foods were estimated from three nutrient composition databases. Zinc absorption was predicted using a mathematical model (Miller equation. Theoretical mean daily per capita physiological and dietary requirements for zinc were calculated using recommendations from the Food and Nutrition Board of the Institute of Medicine and the International Zinc Nutrition Consultative Group. The estimated global prevalence of inadequate zinc intake varied between 12-66%, depending on which methodological assumptions were applied. However, country-specific rank order of the estimated prevalence of inadequate intake was conserved across all models (r = 0.57-0.99, P<0.01. A "best-estimate" model, comprised of zinc and phytate data from a composite nutrient database and IZiNCG physiological requirements for absorbed zinc, estimated the global prevalence of inadequate zinc intake to be 17.3%.Given the multiple sources of uncertainty in this method, caution must be taken in the interpretation of the estimated prevalence figures. However, the results of all models indicate that inadequate zinc intake may be fairly common globally. Inferences regarding the relative likelihood of zinc deficiency as a public health problem in different countries can be drawn based on the country

  2. Residencia para personas mayores en Villa del Prado, Madrid

    Directory of Open Access Journals (Sweden)

    García-Vaquero Alvaro, Javier

    2003-12-01

    Full Text Available Basic faci lities fo r socia l serv ices. Building designed as a home fo r the elderly, with 120 beds plus adult day care service for 40 seniors; erected under an agreement between the Madrid Housing Institute (IVIMA and the Regional Department ofFamily Affairs and Social Services in a small tOWlI in the region ofMadrid with a population of4.350. The design lends particular auention to zoning and spatial distribution based 0 11 a specific organisational chart as wel! as to daylight-related questions. The choice ofmaterials and colours is in keeping with the intended use ofthe building and the characteristics ofits users.Equipamiento Básico para Asistencia Social. Edificio destinado a Residencia pa ra Personas Mayores con una capacidad para 120 plazas residenciales con Centro de Estancias Diurnas para 40 plazas externas, realizado mediante Convenio entre el Instituto de la Vivienda de Madrid (IVIMA y la Consejeria de Familia y Servicios Sociales de la Comunidad de Madrid, en un pequeño municipio de esta Comunidad con una población de 4.350 habitantes. El proyecto dedica especial atención a la zonificación y a la distribució n espacial, en fu nci án de IIt I claro organigrama, y al manej o de la luz natural. La elección de materiales y colores se realiza en funci án del uso a que se destina el edificio ya las especiales características de sus usuarios.

  3. Caracterización de la familia del adulto mayor

    Directory of Open Access Journals (Sweden)

    Yahima Limia Núñez

    2014-08-01

    Full Text Available El envejecimiento en la familia constituye un problema mundial y nacional, teniendo en cuenta esa premisa se realizó un estudio de tipo descriptivo, con el uso de técnicas cuantitativas y cualitativas, para caracterizar las familias donde viven adultos mayores, pertenecientes al área de salud del policlínico docente Dr. Gustavo Aldereguía Lima. Se seleccionaron al azar diez familias del área incluida en el consultorio médico de la familia 94-01 que cumplieran con los criterios de inclusión, las que se caracterizaron a través de las variables socio-psicológicas: estructura, crisis, funcionamiento y percepción familiar; los datos se obtuvieron a partir de las técnicas de entrevista a la familia, la prueba de percepción de funcionamiento familiar (FF-SIL y la prueba de percepción de las relaciones familiares. En las familias estudiadas predominó la existencia de una estructura pequeña; nuclear y unigeneracional; multigeneracional. Las funciones que mejor cumplieron las familias fueron la económica y la educativo-cultural; y las crisis normativas que predominaron fueron la jubilación, el envejecimiento y la enfermedad. El funcionamiento familiar que prevaleció fue el funcional; los indicadores más afectados fueron los roles, la permeabilidad, la comunicación y la adaptabilidad; en la percepción familiar predominaron las familias armónicas, seguidas de las poco armónicas. Los indicadores más afectados fueron el sistema de apoyo, la comunicación y el desempeño de roles. Se concluyó que las familias presentaron fundamentalmente una estructura pequeña y nuclear, son funcionales y son armónicas

  4. Could US mayors achieve the entire US Paris climate target?

    Science.gov (United States)

    Gurney, K. R.; Huang, J.; Hutchins, M.; Liang, J.

    2017-12-01

    After the recent US Federal Administration announcement not to adhere to the Paris Accords, 359 mayors (and counting) in the US pledged to maintain their commitments, reducing emissions within their jurisdictions by 26-28% from their 2005 levels by the year 2025. While important, this leaves a large portion of the US landscape, and a large amount of US emissions, outside of the Paris commitment. With Federal US policy looking unlikely to change, could additional effort by US cities overcome the gap in national policy and achieve the equivalent US national Paris commitment? How many cities would be required and how deep would reductions need to be? Up until now, this question could not be reliably resolved due to lack of data at the urban scale. Here, we answer this question with new data - the Vulcan V3.0 FFCO2 emissions data product - through examination of the total US energy related CO2 emissions from cities. We find that the top 500 urban areas in the US could meet the national US commitment to the Paris Accords with a reduction of roughly 30% below their 2015 levels by the year 2025. This is driven by the share of US emissions emanating from cities, particularly the largest cohort. Indeed, as the number of urban areas taking on CO2 reduction targets grows, the less the reduction burden on any individual city. In this presentation, we provide an analysis of US urban CO2 emissions and US climate policy, accounting for varying definitions of urban areas, emitting sectors and the tradeoff between the number of policy-active cities and the CO2 reduction burden.

  5. BIENESTAR PSICOLÓGICO: ADULTOS MAYORES ACTIVOS A TRAVÉS DEL VOLUNTARIADO

    OpenAIRE

    FERRADA MUNDACA,LESLIE; ZAVALA GUTIÉRREZ,MERCEDES

    2014-01-01

    Objetivo: Comparar el nivel de bienestar psicológico de adultos mayores voluntarios del programa "Asesores Seniors" del Servicio Nacional del Adulto Mayor, Región del Bío-Bío, Chile, y adultos mayores no voluntarios, usuarios de un Centro de Salud Familiar de la misma región. Material y método: Corresponde a un estudio descriptivo - comparativo. La población del estudio corresponde a 60 adultos mayores, 30 voluntarios en un programa gubernamental y 30 no voluntarios usuarios de un Centro de S...

  6. Chloroquine is a zinc ionophore.

    Directory of Open Access Journals (Sweden)

    Jing Xue

    Full Text Available Chloroquine is an established antimalarial agent that has been recently tested in clinical trials for its anticancer activity. The favorable effect of chloroquine appears to be due to its ability to sensitize cancerous cells to chemotherapy, radiation therapy, and induce apoptosis. The present study investigated the interaction of zinc ions with chloroquine in a human ovarian cancer cell line (A2780. Chloroquine enhanced zinc uptake by A2780 cells in a concentration-dependent manner, as assayed using a fluorescent zinc probe. This enhancement was attenuated by TPEN, a high affinity metal-binding compound, indicating the specificity of the zinc uptake. Furthermore, addition of copper or iron ions had no effect on chloroquine-induced zinc uptake. Fluorescent microscopic examination of intracellular zinc distribution demonstrated that free zinc ions are more concentrated in the lysosomes after addition of chloroquine, which is consistent with previous reports showing that chloroquine inhibits lysosome function. The combination of chloroquine with zinc enhanced chloroquine's cytotoxicity and induced apoptosis in A2780 cells. Thus chloroquine is a zinc ionophore, a property that may contribute to chloroquine's anticancer activity.

  7. Innovative uses for zinc in dermatology.

    Science.gov (United States)

    Bae, Yoon Soo; Hill, Nikki D; Bibi, Yuval; Dreiher, Jacob; Cohen, Arnon D

    2010-07-01

    Severe zinc deficiency states, such as acrodermatitis enteropathica, are associated with a variety of skin manifestations, such as perioral, acral, and perineal dermatitis. These syndromes can be reversed with systemic zinc repletion. In addition to skin pathologies that are clearly zinc-dependent, many dermatologic conditions (eg, dandruff, acne, and diaper rash) have been associated and treated with zinc. Success rates for treatment with zinc vary greatly depending on the disease, mode of administration, and precise zinc preparation used. With the exception of systemic zinc deficiency states, there is little evidence that convincingly demonstrates the efficacy of zinc as a reliable first-line treatment for most dermatologic conditions. However, zinc may be considered as an adjunctive treatment modality. Further research is needed to establish the indications for zinc treatment in dermatology, optimal mode of zinc delivery, and best type of zinc compound to be used. Copyright 2010 Elsevier Inc. All rights reserved.

  8. 40 CFR 464.40 - Applicability; description of the zinc casting subcategory.

    Science.gov (United States)

    2010-07-01

    ... casting subcategory. 464.40 Section 464.40 Protection of Environment ENVIRONMENTAL PROTECTION AGENCY (CONTINUED) EFFLUENT GUIDELINES AND STANDARDS METAL MOLDING AND CASTING POINT SOURCE CATEGORY Zinc Casting Subcategory § 464.40 Applicability; description of the zinc casting subcategory. The provisions of this...

  9. Obtention of zinc polymethacrylate via free radicals induced by gamma radiation

    International Nuclear Information System (INIS)

    Urena N, F.; Flores E, J.

    2000-01-01

    The objective of this work was to synthesise the monomer of zinc methacrylate and subsequently to carry out the polymerization reaction with the purpose to obtain the compound desired, the zinc polymethacrylate. For this it was used a gamma radiation source, 60 Co, as initiator of the polymerization reaction. (Author)

  10. Zinc intake and dietary pattern in Jiangsu Province, China: consequences of nutrition transition

    NARCIS (Netherlands)

    Qin, Y.

    2012-01-01

    Background: Jiangsu Province is an economically booming area in East China, where soil zinc concentrations are low. Nutrition transition to a dietary pattern with more animal source foods may have improved zinc intake in this area. However, such a transition may also have

  11. Transformation of zinc hydroxide chloride monohydrate to crystalline zinc oxide.

    Science.gov (United States)

    Moezzi, Amir; Cortie, Michael; McDonagh, Andrew

    2016-04-25

    Thermal decomposition of layered zinc hydroxide double salts provides an interesting alternative synthesis for particles of zinc oxide. Here, we examine the sequence of changes occurring as zinc hydroxide chloride monohydrate (Zn5(OH)8Cl2·H2O) is converted to crystalline ZnO by thermal decomposition. The specific surface area of the resultant ZnO measured by BET was 1.3 m(2) g(-1). A complicating and important factor in this process is that the thermal decomposition of zinc hydroxide chloride is also accompanied by the formation of volatile zinc-containing species under certain conditions. We show that this volatile compound is anhydrous ZnCl2 and its formation is moisture dependent. Therefore, control of atmospheric moisture is an important consideration that affects the overall efficiency of ZnO production by this process.

  12. X-ray radiometric analysis of lead and zinc concentrates using germanium radiation detector

    International Nuclear Information System (INIS)

    Vajgachev, A.A.; Mamysh, V.A.; Mil'chakov, V.I.; Shchekin, K.I.; Berezkin, V.V.

    1975-01-01

    The results of determination of lead, zinc and iron in lead and zinc concentrates by the X-ray-radiometric method with the use of germanium semiconductor detector are presented. In the experiments the 57 Co source and tritium-zirconium target were used. The activity of 57 Co was 2 mc. The area of the germanium detector employed was 5g mm 2 , its thickness - 2.3 mm. In lead concentrates zinc and iron were determined from the direct intensity of K-series radiation. In the analysis of zinc concentrates the same conditions of recording and excitation were used as in the case of lead concentrates, but the measurements were conducted in saturated layers. It is demonstrated that the use of germanium semiconductor detectors in combination with the suggested methods of measurements makes it possible to perform determination of iron, zinc and lead in zinc and lead concentrates with permissible error

  13. Application of zinc isotope tracer technology in tracing soil heavy metal pollution

    Science.gov (United States)

    Norbu, Namkha; Wang, Shuguang; Xu, Yan; Yang, Jianqiang; Liu, Qiang

    2017-08-01

    Recent years the soil heavy metal pollution has become increasingly serious, especially the zinc pollution. Due to the complexity of this problem, in order to prevent and treat the soil pollution, it's crucial to accurately and quickly find out the pollution sources and control them. With the development of stable isotope tracer technology, it's able to determine the composition of zinc isotope. Based on the theory of zinc isotope tracer technique, and by means of doing some latest domestic and overseas literature research about the zinc isotope multi-receiving cups of inductively coupled plasma mass spectrometer (MC-ICP-MS) testing technology, this paper summarized the latest research results about the pollution tracer of zinc isotope, and according to the deficiencies and existing problems of previous research, made outlooks of zinc isotope fractionation mechanism, repository establishment and tracer multiple solutions.

  14. Uptake and partitioning of zinc in Lemnaceae.

    Science.gov (United States)

    Lahive, Elma; O'Callaghan, Michael J A; Jansen, Marcel A K; O'Halloran, John

    2011-11-01

    Macrophytes provide food and shelter for aquatic invertebrates and fish, while also acting as reservoirs for nutrients and trace elements. Zinc accumulation has been reported for various Lemnaceae species. However, comparative accumulation across species and the link between zinc accumulation and toxicity are poorly understood. Morphological distribution and cellular storage, in either bound or soluble form, are important for zinc tolerance. This study shows differences in the uptake and accumulation of zinc by three duckweed species. Landoltia punctata and Lemna minor generally accumulated more zinc than Lemna gibba. L. minor, but not L. gibba or L. punctata, accumulated greater concentrations of zinc in roots compared to fronds when exposed to high levels of zinc. The proportion of zinc stored in the bound form relative to the soluble-form was higher in L. minor. L. punctata accumulated greater concentrations of zinc in fronds compared to roots and increased the proportion of zinc it stored in the soluble form, when exposed to high zinc levels. L. gibba is the only species that significantly accumulated zinc at low concentrations, and was zinc-sensitive. Overall, internal zinc concentrations showed no consistent correlation with toxic effect. We conclude that relationships between zinc toxicity and uptake and accumulation are species specific reflecting, among others, zinc distribution and storage. Differences in zinc distribution and storage are also likely to have implications for zinc bioavailability and trophic mobility.

  15. Inhibitory zinc-enriched terminals in mouse spinal cord

    DEFF Research Database (Denmark)

    Danscher, G; Jo, S M; Varea, E

    2001-01-01

    The ultrastructural localization of zinc transporter-3, glutamate decarboxylase and zinc ions in zinc-enriched terminals in the mouse spinal cord was studied by zinc transporter-3 and glutamate decarboxylase immunohistochemistry and zinc selenium autometallography, respectively.The distribution...

  16. Zinc: an essential oligoelement

    OpenAIRE

    Rubio, C.; González Weller, D.; Martín-Izquierdo, R. E.; Revert, C.; Rodríguez, I.; Hardisson, A.

    2007-01-01

    En este artículo se hace una revisión exhaustiva del zinc, elemento metálico esencial para el funcionamiento del organismo. Repasamos y reflejamos aspectos relacionados con la farmacocinética, con las fuentes dietéticas más importantes, así como las IDR (Ingestas Dietéticas Recomendadas) del mismo. También se hace mención a los signos y síntomas relacionados tanto con una ingesta deficiente, como con posibles efectos tóxicos, derivados de ingestas excesivas.This article comprehensively review...

  17. Cadmium and zinc

    International Nuclear Information System (INIS)

    Safaya, N.M.; McLean, J.E.; Halverson, G.A.

    1987-01-01

    Cadmium and zinc are naturally occurring trace metals that are often considered together because of their close geochemical association and similarities in chemical reactivity. The loss of two electrons from an atom of Cd or Zn imparts to each an electron configuration with completely filled d orbitals; this results in a highly stable 2/sup +/ oxidation state. But Cd and Zn differ greatly in their significance to biological systems. Whereas Zn is an essential nutrient for plants, animals, and humans, Cd is best known for its toxicity to plants and as a causative agent of several disease syndromes in animals and humans

  18. Remediation of arsenic and lead with nanocrystalline zinc sulfide.

    Science.gov (United States)

    Piquette, Alan; Cannon, Cody; Apblett, Allen W

    2012-07-27

    Nanocrystalline (1.7 ± 0.3 nm) zinc sulfide with a specific surface area up to 360 m(2) g(-1) was prepared from the thermal decomposition of a single-source precursor, zinc ethylxanthate. Zinc ethylxanthate decomposes to cubic zinc sulfide upon exposure to temperatures greater than or equal to 125 °C. The resulting zinc sulfide was tested as a water impurity extractant. The target impurities used in this study were As(5+), As(3+), and Pb(2+). The reaction of the nanocrystalline ZnS with Pb(2+) proceeds as a replacement reaction where solid PbS is formed and Zn(2+) is released into the aqueous system. Removal of lead to a level of less than two parts per billion is achievable. The results of a detailed kinetics experiment between the ZnS and Pb(2+) are included in this study. Unlike the instance of lead, both As(5+) and As(3+) adsorb on the surface of the ZnS extractant as opposed to an ion-exchange process. An uptake capacity of > 25 mg g(-1) for the removal of As(5+) is possible. The uptake of As(3+) appears to proceed by a slower process than that of the As(5+) with a capacity of nearly 20 mg g(-1). The nanocrystalline zinc sulfide was extremely successful for the removal of arsenic and lead from simulated oil sand tailing pond water.

  19. El complejo mayor de histocompatibilidad humano: sistema HLA

    Directory of Open Access Journals (Sweden)

    Luis Fernando García

    1989-02-01

    Full Text Available

    El complejo mayor de histocompatibilidad humano, o sistema HLA, está localizado en el brazo corto del cromosoma 6. Sus genes codifican tres tipos de moléculas. Los antígenos clase I (HLA-A, B, C y E están formados por una cadena pesada unida no covalentemente a la β2-microglobulina y se expresan en la superficie de la mayoría de las células nucleadas del organismo. Estos antígenos actúan como elementos de restricción en la activación de los linfocitos T CD8+. Los antígenos clase II son dímeros compuestos por cadenas α y β y su distribución tisular está limitada sólo a algunos tipos de células. Estas moléculas actúan restringiendo la presentación de antígenos a los linfocitos CD4+. Los antígenos de clase III son proteínas plasmáticas del sistema del complemento. Los diferentes loci del sistema HLA son muy polimórficos y sus productos se heredan en bloques conocidos como haplotipos. Debido a que los diferentes grupos étnicos presentan variaciones en la frecuencia de ale ios y haplotipos, el HLA ha sido muy útil en los estudios antropogenéticos. Algunos antígenos HLA están presentes en pacientes con determinadas enfermedades con una frecuencia significativamente diferente a la encontrada en la población general. Estos hallazgos han sido de gran importancia para comprender la patogénesis y los mecanismos genéticos de resistencia o susceptibilidad a dichas enfermedades. En el campo de los transplantes de órganos, la compatibilidad HLA donante-receptor correlaciona con la sobrevida del injerto. El sistema HLA también parece tener mucha importancia en los fenómenos inmunológicos que ocurren durante el

  20. Synthesis of zinc sulfide by chemical vapor deposition using an organometallic precursor: Di-tertiary-butyl-disulfide

    International Nuclear Information System (INIS)

    Vasekar, Parag; Dhakal, Tara; Ganta, Lakshmikanth; Vanhart, Daniel; Desu, Seshu

    2012-01-01

    Zinc sulfide has gained popularity in the last few years as a cadmium-free heterojunction partner for thin film solar cells and is seen as a good replacement for cadmium sulfide due to better blue photon response and non-toxicity. In this work, zinc sulfide films are prepared using an organic sulfur source. We report a simple and repeatable process for development of zinc sulfide using a cost-effective and less hazardous organic sulfur source. The development of zinc sulfide has been studied on zinc oxide-coated glass where the zinc oxide is converted into zinc sulfide. Zinc oxide grown by atomic layer deposition as well as commercially available zinc oxide-coated glass was used. The zinc sulfide synthesis has been studied and the films are characterized using scanning electron microscopy, X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), and a UV–VIS spectrophotometer. XRD, XPS and optical characterization confirm the zinc sulfide phase formation. - Highlights: ► Synthesis of ZnS using a less-hazardous precursor, di-tertiary-butyl-disulfide. ► ZnS process optimized for two types of ZnO films. ► Preliminary results for a solar cell show an efficiency of 1.09%.

  1. Zinc in Infection and Inflammation

    Directory of Open Access Journals (Sweden)

    Nour Zahi Gammoh

    2017-06-01

    Full Text Available Micronutrient homeostasis is a key factor in maintaining a healthy immune system. Zinc is an essential micronutrient that is involved in the regulation of the innate and adaptive immune responses. The main cause of zinc deficiency is malnutrition. Zinc deficiency leads to cell-mediated immune dysfunctions among other manifestations. Consequently, such dysfunctions lead to a worse outcome in the response towards bacterial infection and sepsis. For instance, zinc is an essential component of the pathogen-eliminating signal transduction pathways leading to neutrophil extracellular traps (NET formation, as well as inducing cell-mediated immunity over humoral immunity by regulating specific factors of differentiation. Additionally, zinc deficiency plays a role in inflammation, mainly elevating inflammatory response as well as damage to host tissue. Zinc is involved in the modulation of the proinflammatory response by targeting Nuclear Factor Kappa B (NF-κB, a transcription factor that is the master regulator of proinflammatory responses. It is also involved in controlling oxidative stress and regulating inflammatory cytokines. Zinc plays an intricate function during an immune response and its homeostasis is critical for sustaining proper immune function. This review will summarize the latest findings concerning the role of this micronutrient during the course of infections and inflammatory response and how the immune system modulates zinc depending on different stimuli.

  2. Zinc in Infection and Inflammation.

    Science.gov (United States)

    Gammoh, Nour Zahi; Rink, Lothar

    2017-06-17

    Micronutrient homeostasis is a key factor in maintaining a healthy immune system. Zinc is an essential micronutrient that is involved in the regulation of the innate and adaptive immune responses. The main cause of zinc deficiency is malnutrition. Zinc deficiency leads to cell-mediated immune dysfunctions among other manifestations. Consequently, such dysfunctions lead to a worse outcome in the response towards bacterial infection and sepsis. For instance, zinc is an essential component of the pathogen-eliminating signal transduction pathways leading to neutrophil extracellular traps (NET) formation, as well as inducing cell-mediated immunity over humoral immunity by regulating specific factors of differentiation. Additionally, zinc deficiency plays a role in inflammation, mainly elevating inflammatory response as well as damage to host tissue. Zinc is involved in the modulation of the proinflammatory response by targeting Nuclear Factor Kappa B (NF-κB), a transcription factor that is the master regulator of proinflammatory responses. It is also involved in controlling oxidative stress and regulating inflammatory cytokines. Zinc plays an intricate function during an immune response and its homeostasis is critical for sustaining proper immune function. This review will summarize the latest findings concerning the role of this micronutrient during the course of infections and inflammatory response and how the immune system modulates zinc depending on different stimuli.

  3. Zinc as a Gatekeeper of Immune Function

    Directory of Open Access Journals (Sweden)

    Inga Wessels

    2017-11-01

    Full Text Available After the discovery of zinc deficiency in the 1960s, it soon became clear that zinc is essential for the function of the immune system. Zinc ions are involved in regulating intracellular signaling pathways in innate and adaptive immune cells. Zinc homeostasis is largely controlled via the expression and action of zinc “importers” (ZIP 1–14, zinc “exporters” (ZnT 1–10, and zinc-binding proteins. Anti-inflammatory and anti-oxidant properties of zinc have long been documented, however, underlying mechanisms are still not entirely clear. Here, we report molecular mechanisms underlying the development of a pro-inflammatory phenotype during zinc deficiency. Furthermore, we describe links between altered zinc homeostasis and disease development. Consequently, the benefits of zinc supplementation for a malfunctioning immune system become clear. This article will focus on underlying mechanisms responsible for the regulation of cellular signaling by alterations in zinc homeostasis. Effects of fast zinc flux, intermediate “zinc waves”, and late homeostatic zinc signals will be discriminated. Description of zinc homeostasis-related effects on the activation of key signaling molecules, as well as on epigenetic modifications, are included to emphasize the role of zinc as a gatekeeper of immune function.

  4. Polifarmacia en los adultos mayores Polypharmacy in the older adults

    Directory of Open Access Journals (Sweden)

    César Martínez Querol

    2005-04-01

    Full Text Available Se realizó un estudio descriptivo de corte transversal con 118 senescentes de la población de adultos mayores del consultorio del Médico de la Familia 80.1 del Policlínico "Ana Betancourt", en el municipio Playa. A todos se les llenó una encuesta formulario que contemplaba sus datos generales, así como las enfermedades crónicas y los trastornos de los órganos de los sentidos que padecía. Se enumeraron los medicamentos que ingieren, con la dosis y periodicidad, tanto los prescritos como los autoprescritos, y se consignaron las reacciones adversas atribuidas a los fármacos consumidos. Se revisaron los controles de dispensarización y sus historias clínicas individuales.La prevalencia de polifarmacia detectada fue de 46 casos (39 %. El total de preparados prescritos fue de 303, con un promedio de 3,1 por paciente, la cifra de autoprescripciones fue 49 casos (41 % con 113 fármacos, y un promedio de preparados autorrecetados por anciano de 2,3, siendo los fármacos más indicados por los facultativos los hipotensores, los diuréticos, los psicofármacos, los analgésicos y los antidiabéticos; y entre los autorrecetados se encontraban las vitaminas, los analgésicos, los laxantes, los antihistamínicos y los psicofármacos. Las reacciones adversas se presentaron en 36 casos (37,2 %, señalándose que todas fueron ligeras y atribuidas a fármacos prescritos por los facultativos.A descriptive cross-sectional study was conducted among 118 senescents from the population of older adults of the family physician office 80.1 of "Ana Betancourt" Polyclinic, in Playa municipality. All of them answered a questionnaire to collect their general data, as well as information about the chronic diseases and disorders of the sense organs they suffered from. The drugs they were taking, both prescribed and self-prescribed, with their doses and periodicity were related, and the adverse reactions attributed to the drugs consumed were also exposed. The

  5. Inmunonutrición en el adulto mayor Immunonutrition in the older adult

    Directory of Open Access Journals (Sweden)

    Edelis Castellanos Puerto

    2007-12-01

    Full Text Available El objetivo de este trabajo es hacer una revisión bibliográfica acerca de la nutrición y la inmunidad en el adulto mayor para investigar el estado actual del tema en los últimos años, con el fin de desarrollar un proyecto de investigación con un tema afín, para lograr establecer conductas terapéuticas útiles que faciliten una vida plena a estas personas, y para prevenir una serie de trastornos derivados de las alteraciones en la inmunidad y la nutrición de este grupo etario. Muchas de estas alteraciones provocan la aparición en el adulto mayor de procesos tumorales, enfermedades alérgicas, infecciones severas y enfermedades autoinmunes, todo lo cual hace que la estadía hospitalaria aumente, así como que se dificulte, en muchas ocasiones, una recuperación adecuada. Tanto el tema de la nutrición como el de la inmunidad han sido ampliamente estudiados por numerosos autores. Específicamente en lo que se refiere a la inmunidad se ha demostrado en diversos estudios que en edades avanzadas de la vida los conteos de subpoblaciones linfocitarias están disminuidos, como también la calidad en su función, y además, de todo ello se puede apreciar en trabajos experimentales los factores que tienen que ver con la supervivencia de las células B, productores de anticuerpos. Otros estudios de la inmunidad refieren la repercusión que tiene en el timo, órgano primario del sistema linfoide, la malnutrición crónica, y también se ponen como ejemplos de modelos de malnutrición y alteraciones de la inmunidad a la anorexia nerviosa y la bulimia. En cuanto al tema del déficit nutricional en edades avanzadas, de forma general, podemos decir que los estudios más relevantes plantean la disminución en la ingestión de agentes antioxidantes (se destacan las vitaminas E y C, de los oligoelementos (zinc, selenio, hierro, otros minerales, oligosacáridos fermentados, triacilglicerol, entre otros, y la gran importancia de los probióticos en la

  6. Zinc-air cell with KOH-treated agar layer between electrode and electrolyte containing hydroponics gel

    Energy Technology Data Exchange (ETDEWEB)

    Otham, R. [International Islamic University, Kuala Lumpur (Malaysia); Yahaya, A. H. [University of Malaya, Dept. of Chemistry, Kuala Lumpur (Malaysia); Arof, A. K. [University of Malaya, Dept. of Physics, Kuala Lumpur (Malaysia)

    2002-07-01

    Zinc-air electrochemical power sources possess the highest density compared to other zinc anode batteries, due their free and unlimited supply from the ambient air. In this experiment zinc-air cells have been fabricated employing hydroponics gel as an alternative alkaline electrolyte gelling agent. Thin KOH-treated agar layer was applied between the electrode-electrolyte interfaces which produced significant enhancement of the cells' capacities, indicating that the application of thin agar layer will improve the electrode-gelled electrolyte interfaces. Promising results have been achieved with porous zinc anode prepared from dried zinc-graphite-gelatinized agar paste; e g. a zinc-air cell employing a porous zinc anode has demonstrated a capacity of 1470 mAh rated at 0.1 A continuous discharge. 32 refs., 9 figs.

  7. Expression of zinc transporter genes in rice as influenced by zinc-solubilizing Enterobacter cloacae strain ZSB14

    Directory of Open Access Journals (Sweden)

    Selvaraj eKrithika

    2016-04-01

    Full Text Available Zinc (Zn deficiency in major food crops has been considered as an important factor affecting the crop production and subsequently the human health. Rice (Oryza sativa is sensitive to Zn deficiency and thereby causes malnutrition to most of the rice-eating Asian populations. Application of zinc solubilizing bacteria (ZSB could be a sustainable agronomic approach to increase the soil available Zn which can mitigate the yield loss and consequently the nutritional quality of rice. Understanding the molecular interactions between rice and unexplored ZSB is useful for overcoming Zn deficiency problems. In the present study, the role of zinc solubilizing bacterial strain Enterobacter cloacae strain ZSB14 on regulation of Zn-regulated transporters and iron (Fe-regulated transporter-like protein (ZIP genes in rice under iron sufficient and deficient conditions was assessed by quantitative real-time reverse transcription PCR. The expression patterns of OsZIP1, OsZIP4 and OsZIP5 in root and shoot of rice were altered due to the Zn availability as dictated by Zn sources and ZSB inoculation. Fe sufficiency significantly reduced the root and shoot OsZIP1 expression, but not the OsZIP4 and OsZIP5 levels. Zinc oxide in the growth medium up-regulated all the assessed ZIP genes in root and shoot of rice seedlings. When ZSB was inoculated to rice seedlings grown with insoluble zinc oxide in the growth medium, the expression of root and shoot OsZIP1, OsZIP4 and OsZIP5 was reduced. In the absence of zinc oxide, ZSB inoculation up-regulated OsZIP1 and OsZIP5 expressions. Zinc nutrition provided to the rice seedling through ZSB-bound zinc oxide solubilization was comparable to the soluble zinc sulphate application which was evident through the ZIP genes’ expression and the Zn accumulation in root and shoot of rice seedlings. These results demonstrate that zinc solubilizing bacteria could play a crucial role in zinc fertilization and fortification of rice.

  8. Cathodic hydrogen charging of zinc

    International Nuclear Information System (INIS)

    Panagopoulos, C.N.; Georgiou, E.P.; Chaliampalias, D.

    2014-01-01

    Highlights: •Incorporation of hydrogen into zinc and formation of zinc hydrides. •Investigation of surface residual stresses due to hydrogen diffusion. •Effect of hydrogen diffusion and hydride formation on mechanical properties of Zn. •Hydrogen embrittlement phenomena in zinc. -- Abstract: The effect of cathodic hydrogen charging on the structural and mechanical characteristics of zinc was investigated. Hardening of the surface layers of zinc, due to hydrogen incorporation and possible formation of ZnH 2 , was observed. In addition, the residual stresses brought about by the incorporation of hydrogen atoms into the metallic matrix, were calculated by analyzing the obtained X-ray diffraction patterns. Tensile testing of the as-received and hydrogen charged specimens revealed that the ductility of zinc decreased significantly with increasing hydrogen charging time, for a constant value of charging current density, and with increasing charging current density, for a constant value of charging time. However, the ultimate tensile strength of this material was slightly affected by the hydrogen charging procedure. The cathodically charged zinc exhibited brittle transgranular fracture at the surface layers and ductile intergranular fracture at the deeper layers of the material

  9. Electrodeposition of zinc--nickel alloys coatings

    Energy Technology Data Exchange (ETDEWEB)

    Dini, J W; Johnson, H R

    1977-10-01

    One possible substitute for cadmium in some applications is a zinc--nickel alloy deposit. Previous work by others showed that electrodeposited zinc--nickel coatings containing about 85 percent zinc and 15 percent nickel provided noticeably better corrosion resistance than pure zinc. Present work which supports this finding also shows that the corrosion resistance of the alloy deposit compares favorably with cadmium.

  10. Alexitimia, resiliencia y creencias paranormales en personas mayores en un centro institucionalizado

    Directory of Open Access Journals (Sweden)

    Inmaculada Méndez

    2015-08-01

    Full Text Available La alexitimia hace referencia a la dificultad para comprender e identificar los propios sentimientos y los de los demás. El proceso de adaptación a un centro residencial es una de las situaciones estresantes a las que puede enfrentarse la persona mayor. Para poder sobreponerse ante dichas situaciones es fundamental la capacidad de resiliencia e incluso existen personas que buscan apoyo en la religiosidad o en las creencias en lo paranormal. En este trabajo se estudió la relación entre aleximitia, resiliencia y creencias paranormales en un grupo de 35 personas mayores (21 mujeres con edades entre 66 y 95 años de un centro institucionalizado. Se administraron la escala TAS-20 para la evaluación de la alexitimia, la Escala de Resiliencia CD-RISC y la Escala Mejorada de Creencias Paranormales. Entre los principales resultados cabe destacar que los sujetos con mayores Dificultades para identificar sentimientos son los que presentaban un menor Control personal; los sujetos con mayores Dificultades para identificar sentimientos son los que menor creencia poseían de las Formas de vida extraordinaria y los sujetos con mayor capacidad de Control Personal son los que mayor creencia tenían de las Formas de vida extraordinaria. Se discuten las aplicaciones que los profesionales pueden poner en marcha en centros institucionalizados de personas mayores.

  11. Political Public Relations Campaign for Election of Mayor and Deputy Mayor of Solok Period 2016-2020, Creative Design Coordinator Division

    OpenAIRE

    Sanjaya, Lovegi David; M.Si, Agus Naryoso; M.Si, Much Yulianto; Gono, Joyo M S; Ayun, Primada Qurrota

    2016-01-01

    Public relations, as one of the strategies are quite effective for building the image, as well as long-term relationship with the community or public. This strategy is often combined with a political strategy to win a pair of political party candidates, which is the background of the writing of this scientific work ; the intention to won Irzal Ilyas and Alfauzi Bote as pair of political candidates to become mayor and deputy mayor of Solok period 2016-2021. There need to be applied various eff...

  12. 6646 Volume 12 No. 6 October 2012 ROLE OF ZINC IN HUMAN ...

    African Journals Online (AJOL)

    Pauline

    2012-10-06

    Oct 6, 2012 ... good animal sources of zinc among the white meats, while nuts and legumes are ... Fish, roots and tubers, green leafy vegetables and fruits, are .... several weeks can interfere with copper bioavailability by the induction of the.

  13. Zinc and cadmium monosalicylates

    International Nuclear Information System (INIS)

    Kharitonov, Yu.Ya.; Tujebakhova, Z.K.

    1984-01-01

    Zinc and cadmium monosalicylates of the composition MSal, where M-Zn or Cd, Sal - twice deprotonated residue of salicylic acid O-HOC 6 H 4 COOH (H 2 Sal), are singled out and characterized. When studying thermograms, thermogravigrams, IR absorption spectra, roentgenograms of cadmium salicylate compounds (Cd(OC 6 H 4 COO) and products of their thepmal transformations, the processes of thermal decomposition of the compounds have been characterized. The process of cadmium monosalicylate decomposition takes place in one stage. Complete loss of salicylate acido group occurs in the range of 320-460 deg. At this decomposition stage cadmium oxide is formed. A supposition is made that cadmium complex has tetrahedral configuration, at that, each salicylate group plays the role of tetradentate-bridge ligand. The compound evidently has a polymer structure

  14. Análisis del bienestar de los adultos mayores en México

    OpenAIRE

    García Benítez, Julio César

    2008-01-01

    Esta tesis analiza el bienestar de los adultos mayores en México a partir de la teoría de los funcionamientos y capacidades de Amartya Sen. La investigación tiene dos objetivos principales: el primero es medir el bienestar del adulto mayor con una visión más amplia, en el sentido de incluir tanto indicadores objetivos como subjetivos; y el segundo objetivo es demostrar que este bienestar depende tanto de los recursos, como de los factores de conversión con los que cuenta el adulto mayor, los ...

  15. Estereotipos sociales sobre la vejez en estudiantes mayores: un estudio de caso

    OpenAIRE

    Sanhueza, Javiera

    2014-01-01

    Frente al acelerado envejecimiento poblacional, se plantea el desafío de promocionar los derechos de ciudadanía de los mayores, especialmente aquellos relacionados con la participación social a través de la educación permanente. La investigación describe las imágenes sociales que las personas mayores asistentes al Aula de Mayores “Ciudad de Granada” manifiestan sobre la vejez, comparándolas según variables sociodemográficas. Se aplica el “Cuestionario de Evaluación de Estereotipos Negativos s...

  16. PACIENTE ADULTO MAYOR Y CIRUGÍA NO CARDÍACA: ¿QUÉ DEBEMOS SABER?

    OpenAIRE

    Nazar J,Claudio; Zamora H,Maximiliano; Fuentes H,Ricardo; Lema F,Guillermo

    2015-01-01

    Los procedimientos quirúrgicos en pacientes adultos mayores son cada vez más frecuentes. Se caracterizan por tener mayor morbimortalidad que los realizados en pacientes más jóvenes, por lo que es esencial una apropiada evaluación preoperatoria, una acuciosa monitorización intraoperatoria y un adecuado manejo del período postoperatorio. La edad conlleva una serie de cambios fisiológicos y una mayor incidencia de enfermedades crónicas, que en conjunto determinan una disminución de las reservas ...

  17. Funcionalidad y grado de dependencia en los adultos mayores institucionalizados en centros de bienestar

    Directory of Open Access Journals (Sweden)

    Elveny Laguado Jaimes

    Full Text Available RESUMEN Introducción: La funcionalidad en el adulto mayor constituye un eje principal para los programas orientados a fortalecer el envejecimiento activo; ante el incremento de este grupo poblacional, las enfermedades como factor que limita la capacidad física, mental y social requieren acciones de control que disminuyan la dependencia que contribuye a un deterioro mayor. Objetivo: Determinar la funcionalidad y grado de dependencia en el adulto mayor institucionalizado como información básica para el diseño de un programa de intervención específica. Metodología: estudio descriptivo retrospectivo con una muestra de 60 adultos mayores institucionalizados y seleccionados por muestreo no probabilístico. Resultados: predomina el rango de edad de 75-84 años, un 26,66% de 60 adultos mayores y el género masculino con mayor frecuencia (53,33%. Por lo que respecta a la escolaridad, el 53,3% estudiaron primaria. Contacto familiar con la familia, el 70%; tiempo de institucionalización de los adultos mayores, el mayor tiempo (55% de 1 a 5 años. Predominan los problemas cardiovasculares en el 34% de los adultos mayores. Valoración funcional: predomina el género masculino con dependencia leve (26,66% y como independiente un 25% del género femenino. La valoración del grado de autonomía en el género masculino evidencia un grado de autonomía 1, con un 30% con respecto al género femenino, que tiene un grado de autonomía 3, con el 16,66%, sin significación estadística. Conclusiones: Se observa el predominio del género masculino en los adultos mayores institucionalizados y con dependencia leve, y al contrario en las mujeres, donde la frecuencia de independencia es mayor. En la autonomía predomina un grado mayor en los hombres que en las mujeres.

  18. La sobrecarga de los cuidadores informales de personas mayores dependientes en Medina del Campo

    OpenAIRE

    Archiles Diez, Eva

    2016-01-01

    Los cuidadores informales de personas mayores dependientes constituyen un capital social de vital importancia. El hecho de cuidar a un familiar mayor dependiente, es un fenómeno cada vez más extendido que se está convirtiendo en una experiencia común en la vida familiar de muchas personas, por ello estos cuidadores suponen un capital social de enorme importancia. Este capital social, permite que las personas mayores dependientes que permanecen en el domicilio, puedan disfrutar de un nivel de ...

  19. Zinc sulfide in intestinal cell granules of Ancylostoma caninum adults

    Energy Technology Data Exchange (ETDEWEB)

    Gianotti, A.J.; Clark, D.T.; Dash, J. (Portland State Univ., OR (USA))

    1991-04-01

    A source of confusion has existed since the turn of the century about the reddish brown, weakly birefringent 'sphaerocrystals' located in the intestines of strongyle nematodes, Strongylus and Ancylostoma. X-ray diffraction and energy dispersive spectrometric analyses were used for accurate determination of the crystalline order and elemental composition of the granules in the canine hookworm Ancylostoma caninum. The composition of the intestinal pigmented granules was identified unequivocally as zinc sulfide. It seems most probable that the granules serve to detoxify high levels of metallic ions (specifically zinc) present due to the large intake of host blood.

  20. Structural and electrical characterization of zinc oxide doped with antimony

    Directory of Open Access Journals (Sweden)

    G. Juárez Díaz

    2014-08-01

    Full Text Available In this work we report the results of structural and electrical characterization realized on zinc oxide single crystal samples with (001 orientation, which were doped with antimony. Doping was carried out by antimony thermal diffusion at 1000 °C for periods of 1 and 2 hours under nitrogen environment from a solid source formed by antimony oxide. Electrical characterization by I-V curves and Hall effect shown an increase in acceptor concentration which demonstrates that doping is effective and create holes in zinc oxide samples.

  1. Maternal Zinc Intakes and Homeostatic Adjustments during Pregnancy and Lactation

    OpenAIRE

    Donangelo, Carmen Marino; King, Janet C.

    2012-01-01

    Zinc plays critical roles during embryogenesis, fetal growth, and milk secretion, which increase the zinc need for pregnancy and lactation. Increased needs can be met by increasing the dietary zinc intake, along with making homeostatic adjustments in zinc utilization. Potential homeostatic adjustments include changes in circulating zinc, increased zinc absorption, decreased zinc losses, and changes in whole body zinc kinetics. Although severe zinc deficiency during pregnancy has devastating e...

  2. Effect of zinc from zinc sulfate on trace mineral concentrations of milk ...

    African Journals Online (AJOL)

    PRECIOUS

    2009-11-16

    Nov 16, 2009 ... It suggests that supplementation of ewes diet with zinc sulfate could be an effective way to increase zinc ... alkaline phosphates activity. Zinc supplements were .... Similar results have been reported previously when dairy cows.

  3. Studies on nanocrystalline zinc coating

    Indian Academy of Sciences (India)

    Wintec

    The particles size was also characterized by TEM analysis. Keywords. Electrochemical ... netic materials for magnetic recording, and electrocatalyst for hydrogen .... polarization behaviour was studied in the test electrolyte for zinc deposit of ...

  4. Alcaldes mayores y subdelegados frente a la siembra clandestina de tabaco: Papantla, 1765-1806 Alcaldes Mayores and Subdelegados coping with Tobacco Clandestine Sowing: Papantla, 1765-1806

    Directory of Open Access Journals (Sweden)

    Georgina Moreno Coello

    2012-12-01

    Full Text Available Este trabajo tiene como objeto explorar las estrategias que permitieron la persistencia de la siembra clandestina de tabaco en Nueva España, en particular en la región de Papantla. Analizar las relaciones entre los alcaldes mayores, subdelegados y empleados del monopolio del tabaco, enfatizando la protección informal de la que gozó el cultivo ilegal de parte de las autoridades provinciales y examinar cuál pudo ser el destino del ahorro, así como de las ganancias obtenidas del tabaco ilegal, particularmente en el financiamiento de actividades comerciales y crediticias que llevaban a cabo alcaldes mayores y subdelegados, especialmente en el repartimiento de mercancías.This paper explores the strategies that allowed for a persistent clandestine tobacco sowing in New Spain, mainly in the region of Papantla. It analyzes the relationship between alcaldes mayores, subdelegados and employees of the tobacco monopoly, emphasizing the informal protection given to illegal sowings by provincial authorities. It also examines the potential allocation of savings and profits from illegal tobacco, mainly in the financing of commercial activities undertaken by alcaldes mayores and subdelegados, particularly for the repartimiento.

  5. Zinc Finger Takes on a Whole New Meaning: Reducing and Monitoring Zinc Blanks in the Isotope Lab

    Science.gov (United States)

    Wilkes, E. B.; Wasylenki, L. E.; Anbar, A. D.

    2010-12-01

    In terms of avoiding contamination, zinc is one of the most difficult elements to study isotopically. The reason for this is that zinc stearate is a very common mold release agent in the production of plastics, including those most often used in isotope geochemistry clean labs. While polyethylene bottles, polypropylene centrifuge tubes, pipette tips, and Kimwipes are all potential sources of contaminant zinc, by far the largest amount of zinc is introduced to the laboratory by gloves. Most items can be effectively rid of zinc by soaking in dilute hydrochloric acid, but gloves cannot be cleaned easily, and use of gloves can quickly lead to contamination on many surfaces throughout the lab. We recently conducted several experiments in which dissolved zinc was partly adsorbed onto synthetic Mn oxyhydroxide particles. The dissolved and adsorbed pools were separated by filtration, purified with ion exchange chemistry, and analyzed for isotope composition by MC-ICP-MS. We used a commercially purchased ICP standard solution both as our standard (delta66/64Zn = 0) and as the source of the zinc in the experiments. Whenever gloves were worn during purification, process blanks contained as much as 150 ng Zn, and both the dissolved and adsorbed pools of zinc came out enriched in heavy isotopes relative to the starting pool, contrary to our expectation of mass balance. When gloves were not worn, blanks were brands of vinyl gloves, including one brand recommended to us for being “low” in zinc, measured +10‰ relative to our standard. We therefore concluded that glove zinc contaminated most of our experimental samples. We were only able to see such clear evidence of contamination because (1) we were doing an experiment in which we expected one light and one heavy pool of zinc compared to our standard, and (2) we happened to use an ICP standard solution for delta = 0 that is strongly enriched in light isotopes relative to both brands of gloves. We caution others who measure

  6. Hubungan Kadar Feritin Serum dengan Gangguan Fungsi Paru Pasien Thalassemia Mayor Anak

    Directory of Open Access Journals (Sweden)

    Marte Robiul Sani

    2016-11-01

    Kesimpulan. Terdapat hubungan bermakna kadar feritin serum dengan gangguan fungsi paru pasien thalassemia mayor anak dan kadar feritin 4.839 μg/L merupakan batasan kadar feritin yang berhubungan dengan gangguan fungsi paru.

  7. Organically pillared layered zinc hydroxides

    International Nuclear Information System (INIS)

    Kongshaug, K.O.; Fjellvaag, Helmer

    2004-01-01

    The two organically pillared layered zinc hydroxides [Zn 2 (OH) 2 (ndc)], CPO-6, and [Zn 3 (OH) 4 (bpdc)], CPO-7, were obtained in hydrothermal reactions between 2,6-naphthalenedicarboxylic acid (ndc) and zinc nitrate (CPO-6) and 4,4'biphenyldicarboxylate (bpdc) and zinc nitrate (CPO-7), respectively. In CPO-6, the tetrahedral zinc atoms are connected by two μ 2 -OH groups and two carboxylate oxygen atoms, forming infinite layers extending parallel to the bc-plane. These layers are pillared by ndc to form a three-dimensional structure. In CPO-7, the zinc hydroxide layers are containing four-, five- and six coordinated zinc atoms, and the layers are built like stairways running along the [001] direction. Each step is composed of three infinite chains running in the [010] direction. Both crystal structures were solved from conventional single crystal data. Crystal data for CPO-6: Monoclinic space group P2 1 /c (No. 14), a=11.9703(7), b=7.8154(5), c=6.2428(4) A, β=90.816(2) deg., V=583.97(6) A 3 and Z=4. Crystal data for CPO-7: Monoclinic space group C2/c (No. 15), a=35.220(4), b=6.2658(8), c=14.8888(17) A, β=112.580(4) deg., V=3033.8(6) A 3 and Z=8. The compounds were further characterized by thermogravimetric- and chemical analysis

  8. Apendicitis aguda en el paciente senil: Factores asociados a una mayor morbimortalidad post operatoria

    Directory of Open Access Journals (Sweden)

    Víctor Eduardo Chian Chang

    1996-04-01

    Full Text Available Objetivo: Definir los factores asociados a una mayor morbilidad y mortalidad en pacientes seniles con apendicitis aguda. Material y métodos: Se realizó un estudio retrospectivo con 100 pacientes intervenidos en el Hospital Nacional Arzobispo Loayza, durante el período comprendido entre 1984 a 1994. Resultados: Se asociaron a una mayor frecuencia de complicaciones postoperatorias: edad mayor o igual a 70 años, tiempo de enfermedad mayor de 48 horas, presencia de apendicitis perforada con peritonitis localizada o generalizada (p<0.05. Además la presencia de apendicitis perforada se asoció significativamente a la presencia de absceso residual y/o fístula estercorácea (p=0.027 y la presencia de AA gangrenosa o perforada a mayor frecuencia de infección de herida operatoria (p<0.05. El antecedente de patología cardiovascular previa se asoció a mayor frecuencia de complicaciones cardiovasculares (p<0.05. Se asociaron a mayor mortalidad en AA, pacientes con intervención quirúrgica adicional a la apendicetomía (p=0.016 y presencia de AA perforada (p=0.027. Conclusiones: Los estadios avanzados de AA, así como la presencia de problema cardiovascular al momento del diagnóstico se asociaron con una mayor frecuencia de complicaciones post-operatorias. La presencia de peritonitis se asocia con la mortalidad. (Rev Med Hered 1996; 7: 62-67.

  9. De la brecha digital a la brecha psico-digital: Mayores y redes sociales

    Directory of Open Access Journals (Sweden)

    Begoña Peral Peral

    2015-07-01

    Full Text Available En el presente estudio analizamos la evolución del concepto de la brecha digital para los mayores desde la perspectiva del envejecimiento activo y en el contexto de la utilización de las redes sociales como instrumento de comunicación. Consideramos que las variables socio-demográficas no tienen suficiente poder para explicar la utilización o no de las tecnologías de la comunicación (TIC por los mayores. Las variables de corte psicológico, como la edad cognitiva, la ansiedad tecnológica o el nivel de audacia complementan a las anteriores, e incluso, pueden ser más explicativas del comportamiento del mayor con relación a la utilización de redes sociales. Los resultados provenientes de una muestra de mayores, alumnos del Aula de Experiencia de una universidad, nos permiten confirmar que nuestras dudas acerca del estereotipo de los mayores respecto a la brecha digital son acertadas y que las variables psicológicas sirven, en mayor grado, para mostrar las diferencias significativas existentes entre usuarios y no usuarios de redes sociales en cuanto a la determinación del perfil de los mismos. El usuario mayor de redes sociales se siente más joven, experimenta un menor nivel de ansiedad tecnológica y es más audaz. En general, las características psicológicas ofrecen, por tanto, mayor poder discriminante que las socio-demográficas, por ello proponemos el concepto de brecha psico-digital.

  10. Fruit peel extract mediated green synthesis of zinc oxide nanoparticles

    Science.gov (United States)

    Nava, O. J.; Soto-Robles, C. A.; Gómez-Gutiérrez, C. M.; Vilchis-Nestor, A. R.; Castro-Beltrán, A.; Olivas, A.; Luque, P. A.

    2017-11-01

    This work presents a study of the effects on the photocatalytic capabilities of zinc oxide nanoparticles when prepared via green synthesis using different fruit peel extracts as reducing agents. Zinc nitrate was used as a source of the zinc ions, while Lycopersicon esculentum (tomato), Citrus sinensis (orange), Citrus paradisi (grapefruit) and Citrus aurantifolia (lemon) contributed their peels for extracts. The Synthesized Samples were studied and characterized through Fourier Transform Infrared Spectroscopy (FTIR), X-Ray Diffraction (XRD), and High Resolution Transmission Electron Microscopy (HRTEM). All samples presented a band at 618 cm-1, indicating the presence of the Znsbnd O bond. The different samples all presented the same hexagonal crystal growth in their structure, the Wurtzite phase. The surface morphology of the nanoparticles showed that, depending on the extract used, the samples vary in size and shape distribution due to the chemical composition of the extracts. The photocatalytic properties of the zinc oxide samples were tested through UV light aided degradation of methylene blue. Most samples exhibited degradation rates at 180 min of around 97%, a major improvement when compared to chemically synthesized commercially available zinc oxide nanoparticles.

  11. Estudio comparativo de alexitimia en personas institucionalizadas versus aula de mayores

    Directory of Open Access Journals (Sweden)

    Julia García-Sevilla

    2016-04-01

    Full Text Available La experiencia y regulación de las emociones son aspectos que están adquiriendo mayor importancia a la hora de entender y fomentar el bienestar y la calidad de vida de las personas mayores. El objetivo del presente estudio ha sido llevar a cabo un estudio comparativo de la alexitimia en usuarios pertenecientes a un centro institucionalizado de personas mayores y alumnos matriculados en el aula de mayores. Los participantes del estudio fueron 43 personas institucionalizadas y 48 personas pertenecientes al aula de mayores con una media de edad de 69.30 años y una desviación típica de 66.50. El instrumento utilizado fue la versión adaptada del TAS-20. Los resultados mostraron que las personas institucionalizadas puntuaban más alto en la dificultad para identificar sentimientos, dificultad para describir sentimientos así como en el patrón de pensamiento orientado a lo externo. El sexo fue indiferente en la dificultad para identificar sentimientos, en la dificultad para describir sentimientos así como en el patrón orientado a lo externo. En cuanto a la edad, se encontró una relación con la dificultad para identificar sentimientos y el patrón de pensamiento orientado a lo externo. El estudio permite concluir que la alexitimia se ve influida por el hecho de que la persona mayor se encuentre en un centro institucionalizado.

  12. Nuevos mayores, viejas brechas: TIC, desigualdad y bienestar en la tercera edad en Italia

    Directory of Open Access Journals (Sweden)

    Piermarco Aroldi

    2015-07-01

    Full Text Available Italia parece tener un retraso de unos diez años en comparación con otros países más digitalizados, tanto en el uso de las TIC por las personas mayores como en el estudio de la relación entre las TIC y los mayores de 65 años. Por ello, se hace urgente examinar los factores que influyen en la adopción de las tecnologías por los mayores y la capacidad real de estas para proporcionar recursos culturales e interactivos, útiles para mejorar el envejecimiento activo y mejorar su calidad de vida en salud y vida social. Este trabajo describe los principales resultados de un estudio que involucró a 900 italianos de 65 a 74 años, en el marco de un proyecto nacional de investigación sobre el envejecimiento activo. El estudio indaga en las características sociodemográficas de los mayores italianos usuarios de Internet y en los factores que influyen en el uso de las TIC. Los resultados evidencian que existe una fuerte brecha digital entre los mayores, influenciada por el contexto económico y cultural. En cuanto al envejecimiento activo, se demuestra que los mayores altamente digitales presentan una mejor vida saludable en su envejecimiento, sin poderse concluir que el uso de las TIC garantice la inclusión y participación.

  13. La educación de los adultos mayores en TICs

    Directory of Open Access Journals (Sweden)

    Boarini, Mauricio Nazareno

    2006-01-01

    Full Text Available El siguiente trabajo pretende mostrar una propuesta de educación destinada a la capacitación de Adultos Mayores en TICs, teniendo en cuenta el contexto sociocultural actual que originan estas prácticas, su adecuación a los destinatarios y el reconocimiento que las mismas tienen por parte de los Adultos Mayores, quienes enfrentan el desafío de llevar adelante nuevos aprendizajes para sentirse integrados al grupo social con el que conviven. Atendiendo a este propósito, el trabajo se divide en tres partes; en primer lugar se incluyen diferentes proyecciones poblacionales que muestran el crecimiento de la población de Adultos Mayores a nivel mundial, y se caracteriza a la sociedad, donde la integración de las Tecnologías de la Información y la Comunicación cambia las formas de vida. En segundo lugar, se caracteriza al Adulto Mayor como sujeto destinatario de los diferentes cambios que se deben proponer desde el sistema educativo. Por último se describe la propuesta de educación de Adultos Mayores en TICs del Programa Educativo de Adultos Mayores de la Universidad Nacional de Río Cuarto y la valoración de la misma por parte de los alumnos y sociedad en general.

  14. Effect of Zinc Methionine or Zinc Sulfate Supplementation on Milk Production and Composition of Milk in Lactating Dairy Cows

    DEFF Research Database (Denmark)

    Sobhanirad, Saeid; Carlson, Dorthe; Kashani, Reza Bahari

    2010-01-01

     Zn/kg of dry matter (DM) as zinc sulfate monohydrate (ZnS) and basal diet plus 500 mg Zn/kg of DM as zinc methionine (ZnM). Results showed that milk and fat-corrected milk yield in dairy cows were not significantly affected by Zn source although a numerical increase was observed. The percentages of protein......, lactose, fat, solid nonfat, total solid, and density of milk were not significantly different between treatments. However, dairy cows that received ZnM tended to produce more milk and fat-corrected milk with a lower somatic cell count as compared to controls. The zinc concentration in milk in the Zn...

  15. Nutrition intervention strategies to combat zinc deficiency in developing countries.

    Science.gov (United States)

    Gibson, R S; Ferguson, E L

    1998-06-01

    Widespread zinc deficiency is likely to exist in developing countries where staple diets are predominantly plant based and intakes of animal tissues are low. The severe negative consequences of zinc deficiency on human health in developing countries, however, have only recently been recognized. An integrated approach employing targeted supplementation, fortification and dietary strategies must be used to maximize the likelihood of eliminating zinc deficiency at a national level in developing countries. Supplementation is appropriate only for populations whose zinc status must be improved over a relatively short time period, and when requirements cannot be met from habitual dietary sources. As well, the health system must be capable of providing consistent supply, distribution, delivery and consumption of the zinc supplement to the targeted groups. Uncertainties still exist about the type, frequency, and level of supplemental zinc required for prevention and treatment of zinc deficiency. Salts that are readily absorbed and at levels that will not induce antagonistic nutrient interactions must be used. At a national level, fortification with multiple micronutrients could be a cost effective method for improving micronutrient status, including zinc, provided that a suitable food vehicle which is centrally processed is available. Alternatively, fortification could be targeted for certain high risk groups (e.g. complementary foods for infants). Efforts should be made to develop protected fortificants for zinc, so that potent inhibitors of zinc absorption (e.g. phytate) present either in the food vehicle and/or indigenous meals do not compromise zinc absorption. Fortification does not require any changes in the existing food beliefs and practices for the consumer and, unlike supplementation, does not impose a burden on the health sector. A quality assurance programme is required, however, to ensure the quality of the fortified food product from production to consumption

  16. EFFECT OF DIFFERENT SOURCES AND CONCENTRATIONS OF ZINC IN THE MINERAL MIXTURE ON PERFORMANCE AND SEMINAL CHARACTERISTICS OF GRAZING YOUNG BULLS EFEITO DE DIFERENTES FONTES E CONCENTRAÇÕES DE ZINCO NA MISTURA MINERAL SOBRE DESEMPENHO E CARACTERÍSTICAS SEMINAIS DE TOUROS JOVENS CRIADOS EM CAMPO

    Directory of Open Access Journals (Sweden)

    Luis Carlos Vinhas Ítavo

    2007-09-01

    Full Text Available

    Sixteen young Nellore bulls with approximately 26 months of age  maintained o pasture were submitted to four different supplementations of zinc in the mineral mixture: Zn-0 (without zinc; Zn 30FO (30 mg of organic Zn/Kg; Zn 30FI (30 mg of inorganic Zn/Kg and Zn 60FI (60 mg of inorganic Zn/Kg. Mineral mixture intake was measured and it was verified that the animals of Zn-0 had higher mi-neral mixture intake than the animals of other treatments, differing statistically (P <0,05 of Zn-30FO, Zn-30FI and Zn-60FI and that the animals of Zn-60FI had the lowest intake. Animals were weighted, blood and semen were collected and complete andrological analyses were done. No statistical differences were observed (P>0,05 among treatments for weight gain. Bulls of Zn-0 showed sperma-tozoids with less motility and vigor and higher chances of having spermatozoids with head, middle piece and proximal citoplasmatic drop defects. Animals supplemented with 60 mg of inorganic Zn/Kg showed higher chances of not having head, intermediate piece and proximal citoplasmatic drop defects on spermatozoids. Different sources and concentra-tions of zinc in the mineral mixture of young bulls didn’t affect the performance on experimental conditions, but did in the seminal characteristics.

    KEY-WORDS: Growth, spermatozoids, inorganic zinc, organic zinc.

    Dezesseis tourinhos Nelore de aproximadamente 26 meses de idade mantidos em pasto foram submetidos a qua-tro diferentes suplementações de zinco na mistura mineral: Zn–0 (sem zinco; Zn 30FO (30 mg de Zn orgânico/Kg; Zn 30FI (30 mg de Zn inorgânico/Kg e Zn 60FI (60 mg de Zn inorgânico/Kg. Mediu-se o consumo da mistura mineral e verificou-se que os animais do Zn–0 consumiram mais do que os animais dos demais tratamentos, diferindo estatis-ticamente (P<0,05 de Zn-30FO, Zn-30FI e Zn-60FI e que os animais do Zn-60FI consumiram menos. Procedeu-se à pesagem dos animais, coletaram-se sangue e realizaram-se an

  17. Zinc content of selected tissues and taste perception in rats fed zinc deficient and zinc adequate rations

    International Nuclear Information System (INIS)

    Boeckner, L.S.; Kies, C.

    1986-01-01

    The objective of the study was to determine the effects of feeding zinc sufficient and zinc deficient rations on taste sensitivity and zinc contents of selected organs in rats. The 36 Sprague-Dawley male weanling rats were divided into 2 groups and fed zinc deficient or zinc adequate rations. The animals were subjected to 4 trial periods in which a choice of deionized distilled water or a solution of quinine sulfate at 1.28 x 10 -6 was given. A randomized schedule for rat sacrifice was used. No differences were found between zinc deficient and zinc adequate rats in taste preference aversion scores for quinine sulfate in the first three trial periods; however, in the last trial period rats in the zinc sufficient group drank somewhat less water containing quinine sulfate as a percentage of total water consumption than did rats fed the zinc deficient ration. Significantly higher zinc contents of kidney, brain and parotid salivary glands were seen in zinc adequate rats compared to zinc deficient rats at the end of the study. However, liver and tongue zinc levels were lower for both groups at the close of the study than were those of rats sacrificed at the beginning of the study

  18. FACTORES BIOPSICOSOCIALES ASOCIADOS A LAS ACTIVIDADES DE LA VIDA COTIDIANA DEL ADULTO MAYOR. CENTRO DE SALUD SAN JUAN DEL DISTRITO DE PAUCARPATA.AREQUIPA, 2012

    OpenAIRE

    MACEDO VALENCIA, HILDA EMILIANA

    2013-01-01

    EL ADULTO MAYOR ETAPA EVOLUTIVA DEL ADULTO MAYOR CARACTERÍSTICAS DEL ADULTO MAYOR QUE TIENEN UN ENVEJECIMIENTO SALUDABLE IMPACTO DE LAS CONDICIONES PSICOSOCIALES EN EL ADULTO MAYOR FACTORES BIO-PSICO-SOCIALES FACTORES BIOLÓGICOS FACTORES PSICOLÓGICOS FACTORES SOCIALES ACTIVIDADES DE LA VIDA COTIDIANA DEL ADULTO MAYOR

  19. Nanocarrier-mediated foliar zinc fertilization influences expression of metal homeostasis related genes in flag leaves and enhances gluten content in durum wheat

    OpenAIRE

    Deshpande, Paresh; Dapkekar, Ashwin; Oak, Manoj; Paknikar, Kishore; Rajwade, Jyutika

    2018-01-01

    Background Wheat is the staple food for most of the world’s population; however, it is a poor source of zinc. Foliar fertilization of zinc via zinc loaded chitosan nanocarriers (Zn-CNP) post-anthesis has proved to be a promising approach for grain zinc enhancement in durum wheat as evidenced in our earlier study. However, the molecular mechanism of uptake of zinc via Zn-CNP remains unclear. Methods/Principle findings Foliar application of Zn-CNP was performed at post anthesis stages in two du...

  20. Major depression and explicit memory Memoria explícita en el trastorno depresivo mayor

    Directory of Open Access Journals (Sweden)

    Francisco Lopera Restrepo

    2008-06-01

    :Compatibility> MicrosoftInternetExplorer4

    Introducción: el trastorno depresivo mayor es una alteración muy frecuente del estado de nimo con gran impacto personal y social. Puede generar déficit notables en funciones sicológicas importantes como la ejecutiva, la atención o la memoria y evolucionar hasta un cuadro de pseudodemencia susceptible de mejorar con tratamiento antidepresivo. Objetivo: describir el funcionamiento de la memoria explícita en el trastorno depresivo mayor. Materiales y métodos: se hizo una búsqueda en la base de datos PUBMED con las palabras clave “major depression” (depresión mayor, “explicit memory” (memoria explícita y “recollection memory” (memoria de recolección; se tomaron los artículos publicados después del año 2000; adicionalmente se incluyó bibliograf

  1. Programa Centros Diurnos del Adulto Mayor: recomendaciones para mejorar su funcionamiento

    Directory of Open Access Journals (Sweden)

    Alejandra-Ximena Araya

    Full Text Available Resumen: Introducción: Chile se ha transformado en un país que continuará envejeciendo a un ritmo acelerado. Una de las piezas claves de la Política Integral de Envejecimiento Positivo para Chile es el desarrollo de centros de día para personas mayores (CDPM dirigidos al cuidado de ancianos con dependencia leve. Objetivo: Conocer la percepción que tiene un grupo de personas mayores, sus cuidadores y profesionales de su participación en un CDPM con el propósito de diseñar recomendaciones para mejorar este nuevo tipo de servicio geriátrico instaurado en el país. Metodología: Estudio descriptivo cualitativo realizado con 30 participantes a través de cuatro grupos focales: dos en personas mayores (n = 12, uno con cuidadores (n = 8 y uno con profesionales del centro (n = 10. El análisis de contenido se realizó según Kripperdorff y se cumplieron los criterios de rigor según Guba y Lincoln. Resultados: Se identificaron dos categorías comprensivas principales: 1 percepción de beneficios para las personas mayores: mejoría de la funcionalidad, aumento del bienestar y mayor inserción social y 2 recomendaciones de mejora del CDPM: criterios de ingreso inclusivo, flexibilidad y diversidad en actividades estipuladas y mejoras en el egreso. Conclusiones: Las personas mayores, sus cuidadores y los profesionales que los atienden coinciden en señalar que la asistencia de las personas mayores a este tipo de servicio les reporta beneficios en su funcionalidad, bienestar e inserción social. Este estudio contribuye a ampliar el entendimiento de los resultados en los usuarios de los CDPM, reportando una experiencia en un contexto social particular.

  2. The study and microstructure analysis of zinc and zinc oxide

    Directory of Open Access Journals (Sweden)

    N. Luptáková

    2015-01-01

    Full Text Available The given paper is closely connected with the process of the manufacturing of ZnO. The purity of the metal zinc has crucial influence on the quality of ZnO. ZnO can be produced by pyrometallurgical combustion of zinc and hard zinc. But this mentioned method of preparation leads to the creation of the enormous amount of waste including chemical complexes. On the basis of the occurrence of the residual content of other elements, it is possible to make prediction about the material behavior in the metallographic process. The input and finally materials were investigated and this investigation was done from the aspect of structural and chemical composition of the materials.

  3. The content of zinc in mushrooms of the Semey region near the Irtysh in the Republic of Kazakhstan

    International Nuclear Information System (INIS)

    Sibirkina, A.R.

    2008-01-01

    We received a data about the metal-accumulating ability of the 12 species of mushrooms of the Semey Region near the Irtysh. 66,7 % from general number of learn species of mushrooms relate to the group of intensive absorption of zinc, on index of the biotic of elements. Low content of zinc in the trutovik-saprofites. The coefficient of biological absorption meaning of zinc by learn species of mushrooms to testify about the so it is not powerful, entering source, as an atmospheric air. The investigations are not display of general correlating dependence between the content of zinc in mushrooms and its have very low trust worthiness in the soil.

  4. Characteristic Studies of Micron Zinc Particle Hydrolysis in a Fixed Bed Reactor

    Directory of Open Access Journals (Sweden)

    Lv Ming

    2015-09-01

    Full Text Available Zinc fuel is considered as a kind of promising energy sources for marine propeller. As one of the key steps for zinc marine energy power system, zinc hydrolysis process had been studied experimentally in a fixed bed reactor. In this study, we focus on the characteristics of micron zinc particle hydrolysis. The experimental results suggested that the steam inner diffusion is the controlling step of accumulative zinc particles hydrolysis reaction at a relative lower temperature and a relative higher water partial pressure. In other conditions, the chemical reaction kinetics was the controlling step. And two kinds of chemical reaction kinetics appeared in experiments: the surface reaction and the gas-gas reaction. The latter one occurs usually for larger zinc particles and high reaction temperature. Temperature seems to be one of the most important parameters for the dividing of different reaction mechanisms. Several parameters of the hydrolysis process including heating rate, water partial pressure, the particle size and temperature were also studied in this paper. Results show that the initial reaction temperature of zinc hydrolysis in fixed bed is about 410°C. And the initial reaction temperature increases as the heating rate increases and as the water partial pressure decreases. The total hydrogen yield increases as the heating rate decreases, as the water partial pressure increases, as the zinc particle size decreases, and as the reaction temperature increases. A hydrogen yield of more than 81.5% was obtained in the fixed bed experiments.

  5. Influence of DNA-methylation on zinc homeostasis in myeloid cells: Regulation of zinc transporters and zinc binding proteins.

    Science.gov (United States)

    Kessels, Jana Elena; Wessels, Inga; Haase, Hajo; Rink, Lothar; Uciechowski, Peter

    2016-09-01

    The distribution of intracellular zinc, predominantly regulated through zinc transporters and zinc binding proteins, is required to support an efficient immune response. Epigenetic mechanisms such as DNA methylation are involved in the expression of these genes. In demethylation experiments using 5-Aza-2'-deoxycytidine (AZA) increased intracellular (after 24 and 48h) and total cellular zinc levels (after 48h) were observed in the myeloid cell line HL-60. To uncover the mechanisms that cause the disturbed zinc homeostasis after DNA demethylation, the expression of human zinc transporters and zinc binding proteins were investigated. Real time PCR analyses of 14 ZIP (solute-linked carrier (SLC) SLC39A; Zrt/IRT-like protein), and 9 ZnT (SLC30A) zinc transporters revealed significantly enhanced mRNA expression of the zinc importer ZIP1 after AZA treatment. Because ZIP1 protein was also enhanced after AZA treatment, ZIP1 up-regulation might be the mediator of enhanced intracellular zinc levels. The mRNA expression of ZIP14 was decreased, whereas zinc exporter ZnT3 mRNA was also significantly increased; which might be a cellular reaction to compensate elevated zinc levels. An enhanced but not significant chromatin accessibility of ZIP1 promoter region I was detected by chromatin accessibility by real-time PCR (CHART) assays after demethylation. Additionally, DNA demethylation resulted in increased mRNA accumulation of zinc binding proteins metallothionein (MT) and S100A8/S100A9 after 48h. MT mRNA was significantly enhanced after 24h of AZA treatment also suggesting a reaction of the cell to restore zinc homeostasis. These data indicate that DNA methylation is an important epigenetic mechanism affecting zinc binding proteins and transporters, and, therefore, regulating zinc homeostasis in myeloid cells. Copyright © 2016 Elsevier GmbH. All rights reserved.

  6. The copal of the Chichen Itza offerings and of the Templo Mayor of Tenochtitlan; El copal de las ofrendas de Chichen Itza y del Templo Mayor de Tenochtitlan

    Energy Technology Data Exchange (ETDEWEB)

    Montufar L, A [Subdireccion de Laboratorios y Apoyo Academico INAH, Moneda No. 6, Col Centro, 06060 Mexico D.F. (Mexico); Gutierrez W, C E; Mendoza A, D [ININ, Carr. Mexico-Toluca s/n La Marquesa, 52750 Ocoyoacac, Estado de Mexico (Mexico); Torres M, A [Facultad de Ciencias, UNAM, A.P. 20-364 01000 Mexico D.F. (Mexico)

    2006-07-01

    Literature from the post conquest shows that the Mayans used copal resins in their religious celebrations and ceremonial rites, specially as a sahumerio material. Historical precedents have been fully documented, establishing its use in the calendar ceremonies performed by the Aztecs towards their agricultural practices, mainly for the corn crop; and that according to the registries of sacred figures of their gods, they were made out of copal resin. Abundant fragments of this resin were found in a number of offerings at the digging of the Templo Mayor of Tenochtitlan. These facts indicate the intensive use of the copal as a link with divinities of life, maintenance and fertility, among many other aspects of existence, as stated by the Mexicas cosmos view. In order to determine the possible origin of the different types of copal, small samples were analyzed by infrared spectroscopy, both from Chichen Itza and the pre hispanic from Templo Mayor of Tenochtitlan. Results show a great similarity between each absorption band, the one from Templo Mayor and the modern sample Bursera bipinnata and the one from Chichen Itza and the modem resin of Protium copal. This suggests that the pre hispanic copal form Chichen Itza was obtained from the Protium copal tree. (Author)

  7. LA VIOLENCIA HACIA LA MUJER MAYOR: REVISIÓN BIBLIOGRÁFICA

    Directory of Open Access Journals (Sweden)

    Montserrat Celdrán

    2013-01-01

    Full Text Available A pesar de que el maltrato y la negligencia hacia las personas mayores no es una temática desconocida ni a nivel científico ni de la intervención práctica, perspectivas actuales señalan que al resaltar la edad como factor explicativo de la violencia hacia este colectivo, se ha olvidado la perspectiva de género como forma de entender y actuar sobre la violencia hacia las personas mayores. Esta revisión bibliográfica se centra en esta cuestión de género a la hora de detectar e intervenir en la violencia dirigida hacia la mujer mayor. En concreto se analizarán tres ámbitos estudiados a nivel internacional: características del maltrato hacia la mujer mayor, consecuencias de dicho maltrato a nivel de salud y calidad de vida y propuestas de intervención hacia este colectivo. El artículo quiere servir de marco para iniciar estudios a nivel nacional sobre la problemática de las mujeres mayores que sufren violencia de pareja, tema todavía inédito en nuestro entorno.

  8. Estimulación de la Inteligencia Emocional en mayores: El programa PECI-PM

    Directory of Open Access Journals (Sweden)

    Mª del Carmen Pérez-Fuentes

    2014-12-01

    Full Text Available El programa de Estimulación Cognitiva e Inteligencia Emocional para personas mayores (PECI-PM, combina técnicas de estimulación cognitiva con la intervención y estimulación sobre aspectos relacionados con la inteligencia emocional. El objetivo del presente trabajo es analizar los resultados obtenidos en inteligencia emocional, tras la primera fase de implementación del PECI-PM. Para ello, se contó con una muestra de 28 usuarios del programa, que habían completado 20 sesiones y participado en las dos evaluaciones (pre-post. La Inteligencia Emocional se evaluó, antes y después de la intervención, mediante el Inventario Breve de Inteligencia Emocional para Mayores (EQ-i-M20. Tras la intervención con el PECI-PM, se observa una mejora, en la mayoría de las dimensiones de inteligencia emocional (Intrapersonal, Interpersonal, Adaptabilidad y Estado de Ánimo. En la dimensión Manejo del Estrés, no se observa un cambio en las puntuaciones obtenidas tras la intervención, lo que lleva a replantear el peso de esta dimensión en la inteligencia emocional de la población mayor. Por otro lado, destaca el papel de la dimensión Interpersonal, que correlaciona significativamente con otros factores de la inteligencia emocional (Intrapersonal y Adaptabilidad, en mayores.

  9. Desarrollo de un Taller de risaterapia con un grupo de personas mayores

    Directory of Open Access Journals (Sweden)

    Pablo Santos M.

    2018-01-01

    Full Text Available Introducción: Las personas mayores constituyen un grupo de edad que requiere especial atención. En este contexto, se hace necesario implementar actividades que fomenten el envejecimiento activo y su bienestar psicosocial. Objetivo: se investigan los beneficios de la participación en un taller de risaterapia sobre el bienestar subjetivo y psicológico de un grupo de personas mayores a partir de su experiencia. Metodología: Estudio con enfoque cualitativo mediante entrevistas semiestructuradas a 57 personas mayores no institucionalizadas, con edades comprendidas entre los 60 y 88 años, socias de tres Centros de Día para personas mayores de la Gerencia Territorial de Servicios Sociales de Salamanca (Junta de Castilla y León. El taller de risaterapia se desarrolló durante cuatro sesiones de tres horas de duración cada una, con una periodicidad semanal. Resultados: El análisis de contenido de los discursos de los participantes develan categorías vinculadas a crecimiento personal, mejora del estado de ánimo, valoración de la risa como actividad física y lúdica, incremento de la motivación y fortalecimiento de las relaciones interpersonales. Conclusiones: Los resultados muestran los efectos positivos de los talleres de risaterapia sobre el bienestar psicológico y subjetivo de las personas mayores.

  10. Factores que inciden en la soledad residencial de las personas mayores que viven solas

    Directory of Open Access Journals (Sweden)

    Julia Gallo Estrada

    2015-03-01

    Full Text Available El aumento de la esperanza de vida, los cambios sociales y los cambios en la estructura familiar hacen que cada vez sean más y durante más tiempo las personas mayores que prefieren vivir solas, incluso cuando necesitan cuidados. Este trabajo tiene como objetivo describir el problema de la soledad residencial de las personas mayores profundizando en los factores que pueden influir en esta circunstancia. Se ha realizado una estrategia de búsqueda bibliográfica a partir de los conceptos nucleares: "personas mayores de 75 años que viven solas", "persona mayor frágil", "soporte social y entorno", "nivel de instrucción" y "familia". La información recopilada de las aportaciones científicas realizadas en este campo pone de manifiesto la necesidad de considerar prioritario conocer la opinión de las personas mayores y sus familias sobre los factores que modifican la permanencia en el domicilio.

  11. Impact of residual elements on zinc quality in the production of zinc oxide

    Czech Academy of Sciences Publication Activity Database

    Luptáková, Natália; Dymáček, Petr; Pešlová, F.; Jurkovič, Z.; Barborák, O.; Stodola, J.

    2016-01-01

    Roč. 55, č. 3 (2016), s. 407-410 ISSN 0543-5846 Institutional support: RVO:68081723 Keywords : zinc * metallography * microstructure of zinc * zinc oxide * production of zinc oxide Subject RIV: JG - Metallurgy Impact factor: 0.959, year: 2014

  12. Zinc Biochemistry: From a Single Zinc Enzyme to a Key Element of Life12

    Science.gov (United States)

    Maret, Wolfgang

    2013-01-01

    The nutritional essentiality of zinc for the growth of living organisms had been recognized long before zinc biochemistry began with the discovery of zinc in carbonic anhydrase in 1939. Painstaking analytical work then demonstrated the presence of zinc as a catalytic and structural cofactor in a few hundred enzymes. In the 1980s, the field again gained momentum with the new principle of “zinc finger” proteins, in which zinc has structural functions in domains that interact with other biomolecules. Advances in structural biology and a rapid increase in the availability of gene/protein databases now made it possible to predict zinc-binding sites from metal-binding motifs detected in sequences. This procedure resulted in the definition of zinc proteomes and the remarkable estimate that the human genome encodes ∼3000 zinc proteins. More recent developments focus on the regulatory functions of zinc(II) ions in intra- and intercellular information transfer and have tantalizing implications for yet additional functions of zinc in signal transduction and cellular control. At least three dozen proteins homeostatically control the vesicular storage and subcellular distribution of zinc and the concentrations of zinc(II) ions. Novel principles emerge from quantitative investigations on how strongly zinc interacts with proteins and how it is buffered to control the remarkably low cellular and subcellular concentrations of free zinc(II) ions. It is fair to conclude that the impact of zinc for health and disease will be at least as far-reaching as that of iron. PMID:23319127

  13. Study by XRD and ion beams of tessels of a turquoises disc of the Templo Mayor de Tenochtitlan

    International Nuclear Information System (INIS)

    Ruvalcaba S, J.L.; Bucio, L.; Marin, M.E.; Velasquez, A.

    2005-01-01

    For the study of minerals and semiprecious stones, such as turquoise, it is necessary to use a combined analysis in order to determine crystalline minerals phases and elemental com- position. In this way, it is possible to identify mineralogical substitutions in the crystals and to perform sourcing by trace elemental analysis. In this work, the analysis focused on the study of surface alterations of tessels from a disc found in the 99 offering from Templo Mayor of Tenochtitlan. Rutherford Backscattering Spectrometry and Particle Induced X-ray Emission (PIXE) Spectrometries using protons and alpha particles were applied to determine surface elemental analysis of tessels of different colours (blue, green, white). For mineralogical identification, standard X-ray Diffraction was used. (Author)

  14. Zinc: a multipurpose trace element

    Energy Technology Data Exchange (ETDEWEB)

    Stefanidou, M.; Maravelias, C.; Dona, A.; Spiliopoulou, C. [University of Athens, Department of Forensic Medicine and Toxicology, Athens (Greece)

    2006-01-01

    Zinc (Zn) is one of the most important trace elements in the body and it is essential as a catalytic, structural and regulatory ion. It is involved in homeostasis, in immune responses, in oxidative stress, in apoptosis and in ageing. Zinc-binding proteins (metallothioneins, MTs), are protective in situations of stress and in situations of exposure to toxic metals, infections and low Zn nutrition. Metallothioneins play a key role in Zn-related cell homeostasis due to their high affinity for Zn, which is in turn relevant against oxidative stress and immune responses, including natural killer (NK) cell activity and ageing, since NK activity and Zn ion bioavailability decrease in ageing. Physiological supplementation of Zn in ageing and in age-related degenerative diseases corrects immune defects, reduces infection relapse and prevents ageing. Zinc is not stored in the body and excess intakes result in reduced absorption and increased excretion. Nevertheless, there are cases of acute and chronic Zn poisoning. (orig.)

  15. [Improvement in zinc nutrition due to zinc transporter-targeting strategy].

    Science.gov (United States)

    Kambe, Taiho

    2016-07-01

    Adequate intake of zinc from the daily diet is indispensable to maintain health. However, the dietary zinc content often fails to fulfill the recommended daily intake, leading to zinc deficiency and also increases the risk of developing chronic diseases, particularly in elderly individuals. Therefore, increased attention is required to overcome zinc deficiency and it is important to improve zinc nutrition in daily life. In the small intestine, the zinc transporter, ZIP4, functions as a component that is essential for zinc absorption. In this manuscript, we present a brief overview regarding zinc deficiency. Moreover, we review a novel strategy, called "ZIP4-targeting", which has the potential to enable efficient zinc absorption from the diet. ZIP4-targeting strategy is possibly a major step in preventing zinc deficiency and improving human health.

  16. Zinc blotting assay for detection of zinc binding prolamin in barley (Hordeum vulgare) grain

    DEFF Research Database (Denmark)

    Uddin, Mohammad Nasir; Nielsen, Ane Langkilde-Lauesen; Vincze, Eva

    2014-01-01

    In plants, zinc is commonly found bound to proteins. In barley (Hordeum vulgare), major storage proteins are alcohol-soluble prolamins known as hordeins, and some of them have the potential to bind or store zinc. 65Zn overlay and blotting techniques have been widely used for detecting zinc......-binding protein. However, to our knowledge so far this zinc blotting assay has never been applied to detect a prolamin fraction in barley grains. A radioactive zinc (65ZnCl2) blotting technique was optimized to detect zinc-binding prolamins, followed by development of an easy-to-follow nonradioactive colorimetric...... zinc blotting method with a zinc-sensing dye, dithizone. Hordeins were extracted from mature barley grain, separated by SDS-PAGE, blotted on a membrane, renatured, overlaid, and probed with zinc; subsequently, zinc-binding specificity of certain proteins was detected either by autoradiography or color...

  17. La calidad de vida de los sujetos usuarios de un centro social de personas mayores

    Directory of Open Access Journals (Sweden)

    César Bugallo Carrera

    2014-09-01

    Full Text Available En esta investigación hemos intentado comprobar si la asistencia a los centros sociales de personas mayores es un medio eficaz para la mejora de la calidad de vida de las personas mayores, es decir, si los usuarios de dichos centros tienen una mejor calidad de vida que aquellos que no acuden a ellos. Para ello, hemos contado con un grupo experimental y un grupo control. A continuación ambos grupos han pasado dos pruebas: una que valora la calidad de vida y otra, el deterioro cognitivo. Una vez pasadas las pruebas y obtenidas las puntuaciones, hemos concluido que los usuarios del centro social tienen una mayor calidad de vida que los sujetos que no acuden a él.

  18. Tratamiento del adulto mayor con síndrome coronario agudo

    Directory of Open Access Journals (Sweden)

    Carolina Pemberthy-López

    2016-11-01

    Full Text Available El adulto mayor se encuentra en una etapa de la vida con cambios fisiológicos importantes que posee repercusiones directas e indirectas sobre su estado clínico, es así como el enfoque diagnóstico y terapéutico de sus patologías debe ser abordado desde una perspectiva diferente, con consideraciones especiales para este grupo poblacional. Lamentablemente, este grupo no ha sido bien representado en los diferentes estudios y por tanto, es mucho lo que desconocemos; su comportamiento y la eficacia de las distintas terapias no están bien establecidos. Teniendo de referencia el síndrome coronario agudo como principal causa de mortalidad en pacientes mayores de 65 años de edad, abordaremos esta entidad desde la evidencia que nos aportan algunos de los registros más importantes al respecto en adultos mayores.

  19. Las personas mayores y su salud: situación actual

    OpenAIRE

    P. Ramos Cordero; J.A. Pinto Fontanillo

    2015-01-01

    El envejecimiento de la población es un fenómeno que se está produciendo en todos los países desarrollados. España es el país de Europa con una mayor esperanza de vida y el segundo país a nivel mundial tras Japón. La previsión de este envejecimiento es que se mantenga una proyección constante y que afecte ponderalmente tanto al grupo de los mayores de 65 como al grupo de los mayores de 80, lo que se viene conociendo como el envejecimiento del envejecimiento o sobreenvejecimiento de la poblaci...

  20. A critical examination of the possible application of zinc stable isotope ratios in bivalve mollusks and suspended particulate matter to trace zinc pollution in a tropical estuary.

    Science.gov (United States)

    Araújo, Daniel; Machado, Wilson; Weiss, Dominik; Mulholland, Daniel S; Boaventura, Geraldo R; Viers, Jerome; Garnier, Jeremie; Dantas, Elton L; Babinski, Marly

    2017-07-01

    The application of zinc (Zn) isotopes in bivalve tissues to identify zinc sources in estuaries was critically assessed. We determined the zinc isotope composition of mollusks (Crassostrea brasiliana and Perna perna) and suspended particulate matter (SPM) in a tropical estuary (Sepetiba Bay, Brazil) historically impacted by metallurgical activities. The zinc isotope systematics of the SPM was in line with mixing of zinc derived from fluvial material and from metallurgical activities. In contrast, source mixing alone cannot account for the isotope ratios observed in the bivalves, which are significantly lighter in the contaminated metallurgical zone (δ 66 Zn JMC  = +0.49 ± 0.06‰, 2σ, n = 3) compared to sampling locations outside (δ 66 Zn JMC  = +0.83 ± 0.10‰, 2σ, n = 22). This observation suggests that additional factors such as speciation, bioavailability and bioaccumulation pathways (via solution or particulate matter) influence the zinc isotope composition of bivalves. Copyright © 2017 Elsevier Ltd. All rights reserved.

  1. 21 CFR 582.5985 - Zinc chloride.

    Science.gov (United States)

    2010-04-01

    ... 21 Food and Drugs 6 2010-04-01 2010-04-01 false Zinc chloride. 582.5985 Section 582.5985 Food and Drugs FOOD AND DRUG ADMINISTRATION, DEPARTMENT OF HEALTH AND HUMAN SERVICES (CONTINUED) ANIMAL DRUGS... 1 § 582.5985 Zinc chloride. (a) Product. Zinc chloride. (b) Conditions of use. This substance is...

  2. 21 CFR 182.8985 - Zinc chloride.

    Science.gov (United States)

    2010-04-01

    ... 21 Food and Drugs 3 2010-04-01 2009-04-01 true Zinc chloride. 182.8985 Section 182.8985 Food and... CONSUMPTION (CONTINUED) SUBSTANCES GENERALLY RECOGNIZED AS SAFE Nutrients § 182.8985 Zinc chloride. (a) Product. Zinc chloride. (b) Conditions of use. This substance is generally recognized as safe when used in...

  3. 21 CFR 558.78 - Bacitracin zinc.

    Science.gov (United States)

    2010-04-01

    ... 21 Food and Drugs 6 2010-04-01 2010-04-01 false Bacitracin zinc. 558.78 Section 558.78 Food and... in Animal Feeds § 558.78 Bacitracin zinc. (a) Specifications. Type A medicated articles containing bacitracin zinc equivalent to 10, 25, 40, or 50 grams per pound bacitracin. (b) Approvals. See No. 046573 in...

  4. relationship between maternal serum zinc, cord blood zinc and birth

    African Journals Online (AJOL)

    FOBUR

    those obtained by Okonofua et al in Ile-Ife and. 17. Iqbal et al in Bangladesh but lower than the values. 18. 11 reported in studies in India and the United States. The similarity in the mean maternal serum zinc obtained in this study with the studies in Ife and. Bangladesh could be a reflection of the similarity among the study ...

  5. Tecnología asistencial móvil, con realidad aumentada, para las personas mayores

    Directory of Open Access Journals (Sweden)

    Rafael Saracchini

    2015-07-01

    Full Text Available Las posibilidades que ofrecen las tecnologías son muchas, sin embargo, las personas mayores son a menudo incapaces de disfrutar de ellas plenamente, sintiéndose desanimadas o intimidadas por estos nuevos dispositivos. Esto les lleva a un progresivo aislamiento en una sociedad donde es esencial conocer las distintas formas de comunicación a través de Internet y las TIC. En este trabajo presentamos un estudio realizado durante el proyecto Nacodeal, cuyo objetivo es ofrecer una solución tecnológica para proporcionar autonomía y una mejor calidad de vida para las personas mayores durante sus actividades diarias mediante la integración de las TIC. Para lograr este objetivo se ha desarrollado tecnología puntera en realidad aumentada (RA, así como servicios de Internet e interfaces para dispositivos móviles especialmente diseñados para personas mayores. Estas tecnologías emplean la infraestructura presente en la mayoría de casas y centros de cuidados de mayores. Presentamos un prototipo de sistema compuesto por una tableta y un dispositivo de RA portátil, así como el análisis del impacto social en la interacción con usuarios y la valoración de la aceptación y usabilidad. Esta evaluación se llevó a cabo a través de grupos focales y pruebas piloto individuales con 48 participantes: ancianos, cuidadores y expertos. Sus comentarios concluyen que existen fuertes beneficios e intereses por parte de las personas mayores en las TIC asistenciales basadas en RA, especialmente en los aspectos relacionados con la comunicación y autonomía.

  6. Prevalencia de polifarmacia en adultos mayores residentes de asilos de Hermosillo, Sonora

    Directory of Open Access Journals (Sweden)

    Andrés Canale Segovia

    2014-12-01

    Full Text Available El término polifarmacia se refiere a la utilización de múltiples fármacos por una persona, de manera constante. Debido a que los adultos mayores constituyen el grupo etario con mayor prevalencia de enfermedades crónico-degenerativas, la polifarmacia es un fenómeno común en poblaciones geriátricas. No se conoce con precisión cuál es la prevalencia en un grupo de ancianos asilados del estado de Sonora. Se realizó un estudio transversal, para estimar la prevalencia de polifarmacia en una muestra no probabilística de adultos mayores residentes de asilos de ancianos de Hermosillo, Sonora. La prevalencia de polifarmacia (definida como consumo concomitante de 4 o más fármacos fue de 36.1%, sin diferencias significativas respecto al tipo de enfermedades crónicas padecidas, así como a la edad y sexo de los ancianos asilados. Los sujetos con polifarmacia tuvieron un exceso de riesgo, superior a 10 veces, cuando la prescripción farmacológica era realizada por más de un médico, y tuvieron 5 veces más probabilidad de presentar algún efecto adverso a medicamentos respecto a los sujetos con ausencia de polifarmacia. La polifarmacia es un fenómeno que requiere mayor atención, control e investigación futura, toda vez que los adultos mayores son el grupo poblacional con mayor tendencia de crecimiento en México.

  7. Effect of resveratrol and zinc on intracellular zinc status in normal human prostate epithelial cells

    Science.gov (United States)

    To evaluate the influence of resveratrol on cellular zinc status, normal human prostate epithelial (NHPrE) cells were treated with 6 levels of resveratrol (0, 0.5, 1, 2.5, 5 and 10 microM) and 4 levels of zinc [0, 4, 16, and 32 microM for zinc-deficient (ZD), zinc-normal (ZN), zinc-adequate (ZA), an...

  8. Suicidio en adultos mayores en Costa Rica durante el período 2010-2014

    OpenAIRE

    Vargas Sanabria, Maikel; Vega Chaves, Juan Carlos; Montero Solano, Gustavo; Hernández Romero, Gabriel

    2017-01-01

    Resumen:La población mayor de 65 años es un grupo vulnerable a cometer suicidio, con riesgo 1.5 veces mayor con respecto a los jóvenes. El envejecimiento y sus cambios retan al individuo, de manera que su fracaso predispone a conductas suicidas.Estas tienen mucho más probabilidad de ser letales en comparación con cualquier otro grupo etario. Hay poca investigación en relación con las características epidemiológicas asociadas a este tema. Este artículo pretende describir los principales factor...

  9. Personas mayores y nuevas tecnologias. Propuesta de intervencion con dispositivos moviles

    OpenAIRE

    Pereira García, César Gualter

    2014-01-01

    En el presente trabajo, se proponen los cauces sobre los que llevar a cabo, una intervención psicopedagógica, interrelacionando tres elementos definidos por unas características concretas a contemplar de manera particular; las personas mayores, las características de la sociedad actual, y las tecnologías de la información y comunicación. El constatado aumento de la población, observado este de manera significativa en las personas de mayor edad, exige la implementación de contin...

  10. INCREMENTO DE LA AUTOESTIMA EN LOS ADULTOS MAYORES DE UN HOGAR DE JUBILADOS

    OpenAIRE

    Teresa de Jesús Mazadiego Infante; Janeth Calderón Reyes; Claudia Solares Mejía; Maribel Zárate Moreno; Lisseth Torres Vargas; Ángel de Jesús Coto Sampayo

    2011-01-01

    El objetivo de este trabajo fue probar la efectividad de las técnicas de relajación, terapia ocupacional y dinámicas grupales para mejorar la autoestima de los adultos mayores de una casa-hogar para jubilados. Al efecto, se trabajó con una muestra de 17 adultos mayores, a quienes se asignaron diversas actividades, como ejercicios musicales, juegos de mesa, manualidades y sesiones de intercambio de experiencias y expresión de sentimientos. Los resultados obtenidos muestran un incremento consid...

  11. Estrategias orientadoras apara la elaboración de proyectos de adultos mayores

    OpenAIRE

    Ciano, Natalia

    2011-01-01

    En este trabajo se presenta el proyecto de investigación "estrategias orientadoras para la elaboración de proyectos en adultos mayores" que se propone aplicar las estrategias orientadoras diseñadas en un proyecto anterior a los efectos de analizar el impacto de las mismas en la elaboración de proyectos de adultos mayores. Articula el Modelo de Envejecimiento Activo y el Modelo Teórico Operativo en Orientación. Se parte de los principales resultados obtenidos en la investigación anterior, los ...

  12. ACTIVIDADES DE LA VIDA DIARIA EN ADULTOS MAYORES: LA EXPERIENCIA DE DOS GRUPOS FOCALES

    OpenAIRE

    Christian Oswaldo Acosta Quiroz; Ana Luisa Mónica González-Celis Rangel

    2010-01-01

    El presente estudio tuvo como objetivo obtener una muestra de ejemplos de actividades recreativas físicas y mentales, sociales, de independencia y de protección a la salud, como propuesta inicial de un inventario de actividades de la vida diaria en adultos mayores, a través del desarrollo de dos grupos focales organizados alrededor del tema de actividades cotidianas en ancianos, con ocho y quince adultos mayores, respectivamente. Los resultados reflejan una amplia variedad de actividades de l...

  13. Factores asociados al riesgo nutricional del adulto mayor no institucionalizado, Pasto, Colombia

    OpenAIRE

    Hernández Rangel, Juanita del Pilar

    2017-01-01

    Objetivo: determinar los factores sociales, demográficos, y de salud que se asocian al riesgo nutricional de los adultos mayores no institucionalizados de la ciudad de Pasto en el año 2016. Metodología: estudio de prevalencia analítico a partir del análisis secundario de los datos para la ciudad de Pasto de la encuesta “Índice de vulnerabilidad de los adultos mayores, en tres ciudades de Colombia, 2016”. Se utilizó la Iniciativa del Tamizaje Nutricional (NSI) con la escala DETERMINE para l...

  14. Prevalencia y factores de riesgo en personas adultas mayores en Costa Rica

    OpenAIRE

    Barrientos Calvo, Isabel; Madrigal Leer, Fabián; Abarca Gómez, Leandra

    2014-01-01

    El riesgo nutricional es la potencialidad de desarrollar desnutrición por déficit de alimentación, debido a diversos factores. La prevalencia del riesgo nutricional en adultos mayores utilizando la Valoración Nutricional Mínima (MNA®) en Europa y Estados Unidos es de un 15 % y 20 %. El estudio SABE-México, determinó un 31,8 %. Objetivo: Conocer la prevalencia de riesgo nutricional y sus principales factores asociados en los adultos mayores que asisten a un primer nivel de atención en Costa Ri...

  15. Factores de bienestar laboral : percepción de los trabajadores de mayor edad /

    OpenAIRE

    González Gómez de Olmedo, María Paz

    2014-01-01

    Introducción: La situación demográfica y económica Europea, con la consecuente prolongación de la vida laboral, plantea la necesidad de desarrollar estratégias que permitan, a los trabajadores mayores, conservar la capacidad de trabajo, con salud y bienestar. Objetivos de investigación: - Identificar, empíricamente, en contextos laborales específicos, los factores que, desde la percepción de los trabajadores mayores, estan relacionados con el bienestar y la intención de continuar laboralmente...

  16. El estado de salud del adulto mayor en América Latina

    OpenAIRE

    R. Todd Jewell; Máximo Rossi; Patricia Triunfo

    2006-01-01

    Haciendo uso de los datos de la Encuesta sobre Salud, Bienestar y Envejecimiento, este trabajo analiza el estado de salud de las personas mayores a 60 años en cinco países de América Latina: Argentina, Brasil, Chile, México y Uruguay. Empleando modelos probit ordenados fue posible investigar los efectos de variables socioeconómicas sobre el estado de salud auto-reportado. Los resultados indican que la autopercepción de la salud está relacionada positivamente con una buena nutrición, una mayor...

  17. Relación entre masa ósea y agilidad en personas mayores

    OpenAIRE

    A. Gómez-Cabello; G. Vicente-Rodríguez; A. González-Agüero; I. Ara; J. A. Casajús

    2010-01-01

    El objetivo de este estudio fue analizar la asociación entre masa ósea y agilidad en personas mayores. Se evaluó a 223 participantes mayores de 65 años (64 hombres y 159 mujeres) de Zaragoza (España). Se midió el área, contenido (CMO) y densidad mineral ósea (DMO) en el cuerpo completo, columna lumbar y cadera mediante absorciometría fotónica dual de rayos X (...

  18. Desarrollo en planta piloto de una bebida de lacto suero y fruta natural para adultos mayores /

    OpenAIRE

    Villarreal Arizpe, Beatriz,

    2017-01-01

    Departament responsable de la tesi: Departament de Ciència Animal i dels Aliments. México es el 18 país a nivel mundial, de los mayores productores de leche, el 55% se destina a la producción de los quesos frescos, el subproducto principal es el lacto suero. Los adultos mayores, ocupan gran porcentaje de los habitantes del país, grupo con alta prevalencia de enfermedades relacionadas con estilos de vida no saludables. La innovación de productos en base a subproductos, con adición de ingred...

  19. Estudio sobre la pertinencia del uso de las normas disponibles del Raven en adultos mayores chilenos

    OpenAIRE

    Alarcón Paz,Cristina; Díaz Valenzuela,Vanessa; Hernández Rosales,Jacqueline; Estrada Goic,Claudia

    2012-01-01

    La evaluación de la inteligencia en población adulto mayor ha aumentado su relevancia debido al incremento de la esperanza de vida. Este estudio centra su interés en la pertinencia de normas disponibles para el Test de Matrices Progresivas de Raven para dicha población. Se utilizaron normas de Colchester (1942, en Raven, Court y Raven, 2008), las más completas existentes. Participaron 102 adultos mayores voluntarios (más de 60 años). El diseño fue no experimental transversal correlacional. Lo...

  20. Competencias socio-emocionales en adultos mayores de la ciudad de Buenos Aires

    OpenAIRE

    Mikulic, Isabel M.; Caballero, Romina; Aruanno, Yanina

    2014-01-01

    Con el aumento de la población de adultos mayores, se plantean importantes retos a nivel internacional. Los estudios se focalizaron en factores demográficos, cognitivos y físicos, en cambio, los emocionales fueron escasamente investigados en esta etapa vital. El objetivo de este estudio es evaluar el patrón de competencias socioemocionales en 53 adultos mayores (M =69; DE =4.2), de ambos sexos, y comparar sus diferencias con 53 jóvenes adultos. A todos los participantes se les administró el I...

  1. Exceso de peso y discapacidad en las personas mayores de la Argentina

    OpenAIRE

    Malena Monteverde

    2015-01-01

    El objetivo del presente trabajo es analizar la relación entre el exceso de peso y la condición de discapacidad en las personas mayores de la Argentina y evaluar en qué medida podría estar operando algún factor protector que reduzca o atenúe el efecto del exceso de peso sobre la pérdida de capacidades funcionales en las personas mayores de 64 años. Para ello se utilizan los microdatos de la Encuesta Nacional de Factores de Riesgo 2009. Con el objeto de medir la asociación entre sobrepeso, obe...

  2. Factores que inciden en la soledad residencial de las personas mayores que viven solas

    OpenAIRE

    Julia Gallo Estrada; Jesús Molina Mula

    2015-01-01

    El aumento de la esperanza de vida, los cambios sociales y los cambios en la estructura familiar hacen que cada vez sean más y durante más tiempo las personas mayores que prefieren vivir solas, incluso cuando necesitan cuidados. Este trabajo tiene como objetivo describir el problema de la soledad residencial de las personas mayores profundizando en los factores que pueden influir en esta circunstancia. Se ha realizado una estrategia de búsqueda bibliográfica a partir de los conceptos nucleare...

  3. Actividad física, ejercicio físico y adulto mayor

    OpenAIRE

    Ozols R., Ma Antonieta; Corrales Araya, Ma Antonieta

    2017-01-01

    Se ha comprobado que la actividad física y el ejercicio mejoran la calidad de vida de las personas mayores. Las investigaciones han encontrado progresos en el plano físico, emocional y social. Una de las organizaciones que está promoviendo estilos de vida saludables es la Organización Mundial de la Salud, que ha enfocado su atención en todas las etapas de la vida: desde la niñez hasta la edad adulta mayor.

  4. Programa de entrenamiento en habilidades sociales con personas mayores con discapacidad auditiva y visual leve

    OpenAIRE

    García Carracedo, Laura

    2014-01-01

    A partir de la hipótesis de que la mejora en habilidades sociales va a repercutir en mejorar la calidad de vida de las personas mayores, se ha desarrollado un programa de intervención dirigido a personas mayores con discapacidad auditiva y visual leve procedentes de la residencia “Casa Beneficencia” situada en la calle camino del cementerio en Valladolid. En el presente trabajo hemos utilizado diversas técnicas para la recogida de información previa y posterior diagnóstico de las necesidad...

  5. La perspectiva de las personas mayores sobre el testamento vital Elders´perspective about Advance Directives

    Directory of Open Access Journals (Sweden)

    Inés Mª Barrio Cantalejo

    2006-06-01

    Full Text Available Antecedentes. La popularización del testamento vital (TV exige conocer la perspectiva que sobre él tienen sus potenciales usuarios. Cualquier intento de generalizar el TV sin evaluar cómo será recibido por las personas mayores está condenado al fracaso. Objetivo: Explorar la perspectiva de los mayores sobre el testamento vital. Diseño: Estudio cualitativo. 40 personas mayores, usuarios de 3 Centros de Salud y 1 Residencia Asistida de Madrid, se reunieron en 5 grupos de discusión en abril de 2004. Participantes: 14 mediadores captaron a 2-3 participantes cada uno. Se consideró que edad y residencia en medio familiar o institucional son las variables que más diferencian la elaboración de los discursos sobre el TV. Se utilizaron, pues, como criterios de segmentación, buscando heterogeneidad entre grupos y homogeneidad y heterogeneidad intragrupal. La saturación se consideró cuando las ideas expresadas resultaron recurrentes. Resultados: 4 ideas se extraen de los datos: 1 los mayores prefieren la planificación anticipada de decisiones al TV. 2 Su opinión sobre el TV se asocia a la vivencia singular de otros eventos en el final de la vida. 3 Conceden un papel relevante a la familia. 4 Desean conducir su propia vida, pero "sin papeles escritos". Conclusiones. La implementación del TV a través de una estrategia educativa e institucional se beneficiará si consideramos la perspectiva de la población mayor española sobre el TV.Background: The introduction of advance directives (AD require to examine the perspective their potential users have about. Any public policy about the implementation of ADs adressed to elders will fall if their perspective is unknown. Objective: To examine the elders' perspective about advance directives. Methods: Qualitative study. 40 elders, users of 3 Primary Health Care Center, and of 1 Nursing Home from Madrid. 5 focus groups were organized in 2004 April. Participants: 14 providers recruited 2

  6. Dietetic determinants of zinc consumption in stunted children under five in maya communities from Guatemala

    OpenAIRE

    Monroy-Valle, Michele; Universidad Rafael Landívar, Facultad de Ciencias de la Salud, Licenciatura en Nutrición Universidad de San Carlos de Guatemala, Facultad de Ciencias Químicas y Farmacia, Unidad de Estadística, Epidemiología y Salud Pública; Coyoy, Wendy; Universidad Rafael Landívar, Facultad de Ciencias de la Salud, Licenciatura en Nutrición; De León, Jorge; Universidad de San Carlos de Guatemala, Facultad de Ciencias Químicas y Farmacia, Unidad de Estadística, Epidemiología y Salud Pública; Flórez, Iván D.; Departamento de Pediatría y Puericultura, Universidad de Antioquia, Medellín, Colombia; Department of Clinical Epidemiology & Biostatistics, McMaster University, Hamilton, Canada.

    2017-01-01

    The objective of the study was to identify the elements from feeding patterns that influence the intake and bioavailability of zinc in stunted children (SC) 1-5 years from Maya communities living in Huehuetenango, Guatemala. This descriptive, cross-sectional study was performed in 138 stunted children aged 1-5 years. It was applied: an inventory of zinc food sources availability, a Food Frequency Questionnaire, a questionnaire about living conditions. anthropometrics measurements and informat...

  7. Cyclic AMP Pathway Activation and Extracellular Zinc Induce Rapid Intracellular Zinc Mobilization in Candida albicans

    Science.gov (United States)

    Kjellerup, Lasse; Winther, Anne-Marie L.; Wilson, Duncan; Fuglsang, Anja T.

    2018-01-01

    Zinc is an essential micronutrient, required for a range of zinc-dependent enzymes and transcription factors. In mammalian cells, zinc serves as a second messenger molecule. However, a role for zinc in signaling has not yet been established in the fungal kingdom. Here, we used the intracellular zinc reporter, zinbo-5, which allowed visualization of zinc in the endoplasmic reticulum and other components of the internal membrane system in Candida albicans. We provide evidence for a link between cyclic AMP/PKA- and zinc-signaling in this major human fungal pathogen. Glucose stimulation, which triggers a cyclic AMP spike in this fungus resulted in rapid intracellular zinc mobilization and this “zinc flux” could be stimulated with phosphodiesterase inhibitors and blocked via inhibition of adenylate cyclase or PKA. A similar mobilization of intracellular zinc was generated by stimulation of cells with extracellular zinc and this effect could be reversed with the chelator EDTA. However, zinc-induced zinc flux was found to be cyclic AMP independent. In summary, we show that activation of the cyclic AMP/PKA pathway triggers intracellular zinc mobilization in a fungus. To our knowledge, this is the first described link between cyclic AMP signaling and zinc homeostasis in a human fungal pathogen. PMID:29619016

  8. Copper, lead and zinc production

    International Nuclear Information System (INIS)

    Ayers, J.; Ternan, S.

    2001-01-01

    This chapter provides information on the by-products and residues generated during the production of copper, lead and zinc. The purpose of this chapter is to describe by-products and residues which are generated, how these may be avoided or minimised, and available options for the utilization and management of residues. (author)

  9. Serum zinc level in thalassemia

    International Nuclear Information System (INIS)

    Keikhaei, B.; Badavi, M.; Pedram, M.; Zandian, K.

    2010-01-01

    To compare serum zinc level between Thalassemia Major (TM) patients and normal population at Shafa Hospital in South West of Iran. A total of 25 male and 36 female of TM patients were enrolled in this study. Out of 61 patients thirty were treated by deferroxamine (DFO) and 31 were on the combination of DFO and deferiprone (DEF) protocol therapy. Sixty normal subjects of the matching age and gender were recruited as controls. From each patient and control group 2 ml of blood was taken in fasting condition. Cell blood count and serum zinc were carried out for both thalassemia patients and normal subjects. The mean age of patients and control group was 15+- 5 years. Mean serum zinc level was 68.97+- 21.12 mu g/dl, 78.10-28.50 mu g/dl, and 80.16+- 26.54 mu g/dl in the TM with DFO, TM with DFO + DEF combination protocol and control group respectively. There was no significant correlation between patients and control group. However 50 percent of TM with DFO, 38.7 percent of TM with DFO + DEF and 32.8 percent of control group had hypozincemia. Nearly 40 to 50 percent of TM patients and one third of normal subjects are suffering from hypozincemia. This study shows that low level of serum zinc is a health problem in both thalassemia patients and normal population in South West of Iran. (author)

  10. Molybdate based passivation of zinc

    DEFF Research Database (Denmark)

    Tang, Peter Torben; Bech-Nielsen, Gregers; Møller, Per

    1997-01-01

    In order to reduce corrosion rates, zinc plated parts are usually chromated. Recently chromates have caused increasingly environmental concern, for both allergic effects among workers touching chro-mated parts and toxic effects on fish, plants and bacteria. A molybdate based alternative has been...

  11. Improved colorimetric determination of serum zinc.

    Science.gov (United States)

    Johnson, D J; Djuh, Y Y; Bruton, J; Williams, H L

    1977-07-01

    We show how zinc may easily be quantified in serum by first using an optimum concentration of guanidine hydrochloride to cause release of zinc from proteins, followed by complexation of released metals with cyanide. The cyanide complex of zinc is preferentially demasked with chloral hydrate, followed by a colorimetric reaction between zinc and 4-(2-pyridylazo)resorcinol. This is a sensitive water-soluble ligand; its complex with zinc has an absorption maximum at 497 nm. Values found by this technique compare favorably with those obtained by atomic absorption spectroscopy.

  12. Alcaldes mayores y subdelegados frente a la siembra clandestina de tabaco: Papantla, 1765-1806 Alcaldes Mayores and Subdelegados coping with Tobacco Clandestine Sowing: Papantla, 1765-1806

    OpenAIRE

    Georgina Moreno Coello

    2012-01-01

    Este trabajo tiene como objeto explorar las estrategias que permitieron la persistencia de la siembra clandestina de tabaco en Nueva España, en particular en la región de Papantla. Analizar las relaciones entre los alcaldes mayores, subdelegados y empleados del monopolio del tabaco, enfatizando la protección informal de la que gozó el cultivo ilegal de parte de las autoridades provinciales y examinar cuál pudo ser el destino del ahorro, así como de las ganancias obtenidas del tabaco ilegal, p...

  13. Zinc-The key to preventing corrosion

    Science.gov (United States)

    Kropschot, S.J.; Doebrich, Jeff L.

    2011-01-01

    Centuries before it was identified as an element, zinc was used to make brass (an alloy of zinc and copper) and for medicinal purposes. Metallic zinc and zinc oxide were produced in India sometime between the 11th and 14th centuries and in China in the 17th century, although the discovery of pure metallic zinc is credited to the German chemist Andreas Marggraf, who isolated the element in 1746. Refined zinc metal is bluish-white when freshly cast; it is hard and brittle at most temperatures and has relatively low melting and boiling points. Zinc alloys readily with other metals and is chemically active. On exposure to air, it develops a thin gray oxide film (patina), which inhibits deeper oxidation (corrosion) of the metal. The metal's resistance to corrosion is an important characteristic in its use.

  14. Tele-asistencia y tele-alarma para adultos mayores: experiencias preliminares en Mexico

    Directory of Open Access Journals (Sweden)

    Liliana Giraldo-Rodriguez

    2013-08-01

    Full Text Available OBJETIVO Analizar el efecto de un programa piloto de tele-asistencia y tele-alarma en la autopercepción del estado de salud de los adultos mayores y conocer la satisfacción y aceptación del programa. METODOS Estudio transversal que incluyó entrevistas a 378 adultos mayores, 294 cuidadores/familiares y 53 profesionales de la salud, realizado en la Ciudad de México en 2010. Variables sociodemográficas, de autopercepción del estado de salud, satisfacción y aceptación del programa se obtuvieron por medio de cuestionario estandarizado. Se realizó análisis descriptivo y se utilizaron pruebas no paramétricas. RESULTADOS Se observaron efectos significativos en la autopercepción del estado de salud, 6,17 (DE 17,9 p < 0,05 puntos por encima de la media. El programa tuvo una buena aceptación por parte de los adultos mayores, de sus cuidadores familiares y de los profesionales de la salud. CONCLUSIONES El programa contribuye a mantener o mejorar la calidad de vida, permite la atención preventiva y es un medio ideal para dar apoyo psicosocial a los adultos mayores.

  15. ¿Estamos preparados para la atención primaria del adulto mayor?

    Directory of Open Access Journals (Sweden)

    Marco Zelada R

    Full Text Available RESUMEN El Ministerio de Salud ha implementado el Modelo de Atención Integral en Salud enfocado por etapas de vida,siendo parte de este,el Programa de Atención al Adulto Mayor.Con el objetivo de conocer el nivel de conocimientos previos sobre geriatría,se realizó una encuesta a los responsables y miembros del equipo interdisciplinario a cargo de dicho programa.Se entrevistó a 73 profesionales de los cuales el 30%recibió conocimientos en el pregrado,y de éstos, 59%la considero como regular o mala;sólo 10%manifestó que basado en sus conocimientos y experiencia tiene la capacidad para manejar problemas de un adulto mayor.Todos consideraron necesaria la capacitación,para ello prefe- rían talleres teórico-prácticos,con pasantías en servicios de geriatría.Los temas de mayor interés fueron hipertensión arterial (84%,depresión (73%,osteoporosis (66%y diabetes (56%.En conclusión,existe una deficiente formación en geriatría entre los responsables de la atención al adulto mayor,debido a una falta de enseñanza en las universidades y pobre capacitación a los profesionales.

  16. Penilaian Gangguan Perilaku Anak Talasemia Mayor dengan Menggunakan The Child Behavior Checklist

    Directory of Open Access Journals (Sweden)

    Mire Riyana

    2018-01-01

    Kesimpulan. Terdapat gangguan perilaku pada anak talasemia mayor. Didapatkan sebagian besar anak dengan gangguan perilaku internal, sementara sebagian besar anak dengan perilaku eksternal dalam kategori normal. Usia anak yang lebih tua memiliki skor CBCL lebih tinggi dan memiliki lebih banyak masalah perilaku.

  17. Changing Course on School Reform: Strategic Organizing around the New York City Mayoral Election

    Science.gov (United States)

    Easton, Billy

    2014-01-01

    New York City's new mayor, Bill de Blasio, represents a dramatic shift from his predecessor Michael Bloomberg in the area of education. Bloomberg was a national trendsetter on market reforms focused on privatization, testing, and competition. De Blasio was elected on an agenda of classroom investments, student supports, parent and community…

  18. Riesgo de deterioro cognitivo en personas mayores de las subregiones de Antioquia, Colombia

    Directory of Open Access Journals (Sweden)

    Angela Segura Cardona

    Full Text Available Resumen En este artículo, se buscó conocer la prevalencia de riesgo de deterioro cognitivo y su relación con factores demográficos, sociales y funcionales en las personas mayores de las subregiones de Antioquia, Colombia. Se trata de un estudio cuantitativo, transversal analítico, con fuente de información primaria. La muestra fue probabilística y se determinó el riesgo de deterioro cognitivo con la escala minimental. Así se encontró que el 83,1% de los mayores presenta algún riesgo de deterioro cognitivo, principalmente las mujeres, y está asociado significativamente con vivir en la subregión del Magdalena Medio y Medellín, tener mayor edad, no tener pareja, no tener escolaridad, tener escasos recursos sociales, no participar en grupos comunitarios, tener mala percepción de la calidad de vida, estar insatisfecho con la salud y tener dependencia funcional para realizar las actividades básicas. Estos resultados permiten orientar los programas de salud pública relacionados con la inclusión de las personas mayores hacia programas educativos, la participación en grupos comunitarios, la tamización constante en los servicios de salud, el fortalecimiento de los recursos sociales y el fomento de la actividad física en la vejez, para lograr un envejecimiento saludable con mejor calidad de vida.

  19. Estrategias de cuidados de las familias con las personas mayores que viven solas

    Directory of Open Access Journals (Sweden)

    Julia Gallo Estrada

    2013-06-01

    Full Text Available Los cambios en el envejecimiento hacen una llamada a trasformar los cuidados dirigidos a las personas mayores que viven solas. Objetivo: Conocer la percepción de la familia sobre el cuidado a los mayores que viven solos. Metodología: Estudio cualitativo mediante análisis de discurso a partir del referencial crítico social y los conceptos de la teoría de Bourdieu. Se realizaron 4 grupos de discusión agrupando a los participantes por género y nivel de instrucción. Resultados: los participantes consideran que la red sociofamiliar puede actuar sobre la discapacidad. Preocupa la manera en la que la persona mayor cubre sus necesidades. Destacan como fundamental el apoyo en la realización de los cuidados. Comparten la idea de que las mujeres mayores se adaptan mejor que los hombres a vivir en soledad. Las mujeres cuidadoras tienden a intervenir precozmente ante los problemas. Los hombres esperan y si pueden delegan. Conclusión: la familia cuestiona los beneficios de la convivencia. La orientación profesional en el cuidado es escasa. Los servicios sociales deben mejorar su accesibilidad.

  20. Leadership of mayors and governors during crises: a systematic review on tasks and effectiveness.

    NARCIS (Netherlands)

    Jong, W.; Dückers, M.L.A.; Velden, P.G. van der

    2016-01-01

    The aim of this article is to provide a systematic review of peer-reviewed literature on leadership tasks and effectiveness of mayors and governors during drastic collective events. A total of 34 peer-reviewed articles met our criteria. They were analysed using the theoretical framework by Boin on

  1. Tipología de compradores online mayores de 55 años

    Directory of Open Access Journals (Sweden)

    Ángel F. Villarejo-Ramos

    2015-12-01

    Full Text Available La edad se considera una de las variables determinantes del riesgo de exclusión social de la población, especialmente con relación al uso de las nuevas tecnologías en general y de Internet en particular. Esto ha incidido en una creciente preocupación por el estudio del colectivo de mayores de 55 años y sus peculiaridades en lo relativo al acceso, uso y aprovechamiento de las TIC (Tecnologías de la Información y la Comunicación. Sin embargo, los esfuerzos se han centrado, mayoritariamente, en el análisis del grupo de mayores como algo homogéneo, lo que ha llevado a establecer sus perfiles de comportamiento en comparación con el de otros grupos de edad. En esta investigación, con una muestra útil de 595 mayores, partimos de la consideración del colectivo como grupo heterogéneo, con distintas características y condiciones de uso de Internet, y proponemos un modelo de clases latentes que nos permite establecer tres perfiles de mayores internautas en función de la utilización de un servicio avanzado de Internet, la compra online.

  2. Transporter genes identified in landraces associated with high zinc in polished rice through panicle transcriptome for biofortification.

    Directory of Open Access Journals (Sweden)

    C N Neeraja

    Full Text Available Polished rice is poor source of micronutrients, however wide genotypic variability exists for zinc uptake and remobilization and zinc content in brown and polished grains in rice. Two landraces (Chittimutyalu and Kala Jeera Joha and one popular improved variety (BPT 5204 were grown under zinc sufficient soil and their analyses showed high zinc in straw of improved variety, but high zinc in polished rice in landraces suggesting better translocation ability of zinc into the grain in landraces. Transcriptome analyses of the panicle tissue showed 41182 novel transcripts across three samples. Out of 1011 differentially expressed exclusive transcripts by two landraces, 311 were up regulated and 534 were down regulated. Phosphate transporter-exporter (PHO, proton-coupled peptide transporters (POT and vacuolar iron transporter (VIT showed enhanced and significant differential expression in landraces. Out of 24 genes subjected to quantitative real time analyses for confirmation, eight genes showed significant differential expression in landraces. Through mapping, six rice microsatellite markers spanning the genomic regions of six differentially expressed genes were validated for their association with zinc in brown and polished rice using recombinant inbred lines (RIL of BPT 5204/Chittimutyalu. Thus, this study reports repertoire of genes associated with high zinc in polished rice and a proof concept for deployment of transcriptome information for validation in mapping population and its use in marker assisted selection for biofortification of rice with zinc.

  3. Transporter genes identified in landraces associated with high zinc in polished rice through panicle transcriptome for biofortification

    Science.gov (United States)

    Kulkarni, Kalyani S.; Madhu Babu, P.; Sanjeeva Rao, D.; Surekha, K.; Ravindra Babu, V

    2018-01-01

    Polished rice is poor source of micronutrients, however wide genotypic variability exists for zinc uptake and remobilization and zinc content in brown and polished grains in rice. Two landraces (Chittimutyalu and Kala Jeera Joha) and one popular improved variety (BPT 5204) were grown under zinc sufficient soil and their analyses showed high zinc in straw of improved variety, but high zinc in polished rice in landraces suggesting better translocation ability of zinc into the grain in landraces. Transcriptome analyses of the panicle tissue showed 41182 novel transcripts across three samples. Out of 1011 differentially expressed exclusive transcripts by two landraces, 311 were up regulated and 534 were down regulated. Phosphate transporter-exporter (PHO), proton-coupled peptide transporters (POT) and vacuolar iron transporter (VIT) showed enhanced and significant differential expression in landraces. Out of 24 genes subjected to quantitative real time analyses for confirmation, eight genes showed significant differential expression in landraces. Through mapping, six rice microsatellite markers spanning the genomic regions of six differentially expressed genes were validated for their association with zinc in brown and polished rice using recombinant inbred lines (RIL) of BPT 5204/Chittimutyalu. Thus, this study reports repertoire of genes associated with high zinc in polished rice and a proof concept for deployment of transcriptome information for validation in mapping population and its use in marker assisted selection for biofortification of rice with zinc. PMID:29394277

  4. Transporter genes identified in landraces associated with high zinc in polished rice through panicle transcriptome for biofortification.

    Science.gov (United States)

    Neeraja, C N; Kulkarni, Kalyani S; Madhu Babu, P; Sanjeeva Rao, D; Surekha, K; Ravindra Babu, V

    2018-01-01

    Polished rice is poor source of micronutrients, however wide genotypic variability exists for zinc uptake and remobilization and zinc content in brown and polished grains in rice. Two landraces (Chittimutyalu and Kala Jeera Joha) and one popular improved variety (BPT 5204) were grown under zinc sufficient soil and their analyses showed high zinc in straw of improved variety, but high zinc in polished rice in landraces suggesting better translocation ability of zinc into the grain in landraces. Transcriptome analyses of the panicle tissue showed 41182 novel transcripts across three samples. Out of 1011 differentially expressed exclusive transcripts by two landraces, 311 were up regulated and 534 were down regulated. Phosphate transporter-exporter (PHO), proton-coupled peptide transporters (POT) and vacuolar iron transporter (VIT) showed enhanced and significant differential expression in landraces. Out of 24 genes subjected to quantitative real time analyses for confirmation, eight genes showed significant differential expression in landraces. Through mapping, six rice microsatellite markers spanning the genomic regions of six differentially expressed genes were validated for their association with zinc in brown and polished rice using recombinant inbred lines (RIL) of BPT 5204/Chittimutyalu. Thus, this study reports repertoire of genes associated with high zinc in polished rice and a proof concept for deployment of transcriptome information for validation in mapping population and its use in marker assisted selection for biofortification of rice with zinc.

  5. Effects of serum zinc level on tinnitus.

    Science.gov (United States)

    Berkiten, Güler; Kumral, Tolgar Lütfi; Yıldırım, Güven; Salturk, Ziya; Uyar, Yavuz; Atar, Yavuz

    2015-01-01

    The aim of this study was to assess zinc levels in tinnitus patients, and to evaluate the effects of zinc deficiency on tinnitus and hearing loss. One-hundred patients, who presented to an outpatient clinic with tinnitus between June 2009 and 2014, were included in the study. Patients were divided into three groups according to age: Group I (patients between 18 and 30years of age); Group II (patients between 31 and 60years of age); and Group III (patients between 61 and 78years of age). Following a complete ear, nose and throat examination, serum zinc levels were measured and the severity of tinnitus was quantified using the Tinnitus Severity Index Questionnaire (TSIQ). Patients were subsequently asked to provide a subjective judgment regarding the loudness of their tinnitus. The hearing status of patients was evaluated by audiometry and high-frequency audiometry. An average hearing sensitivity was calculated as the mean value of hearing thresholds between 250 and 20,000Hz. Serum zinc levels between 70 and 120μg/dl were considered normal. The severity and loudness of tinnitus, and the hearing thresholds of the normal zinc level and zinc-deficient groups, were compared. Twelve of 100 (12%) patients exhibited low zinc levels. The mean age of the zinc-deficient group was 65.41±12.77years. Serum zinc levels were significantly lower in group III (p<0.01). The severity and loudness of tinnitus were greater in zinc-deficient patients (p=0.011 and p=0.015, respectively). Moreover, the mean thresholds of air conduction were significantly higher in zinc-deficient patients (p=0.000). We observed that zinc levels decrease as age increases. In addition, there was a significant correlation between zinc level and the severity and loudness of tinnitus. Zinc deficiency was also associated with impairments in hearing thresholds. Copyright © 2015 Elsevier Inc. All rights reserved.

  6. Manifestaciones de violencia intrafamiliar hacia adultos mayores diabéticos. Pinar del Rio, 2012

    Directory of Open Access Journals (Sweden)

    María de la Caridad Casanova Moreno

    Full Text Available Introducción: la violencia contra el adulto mayor es un problema que requiere de sensibilización por parte del equipo de salud para ser visualizado. Objetivo: caracterizar las manifestaciones de violencia intrafamiliar hacia el adulto mayor diabético en un consultorio de la provincia de Pinar del Río. Métodos: se realizó un estudio descriptivo transversal durante el primer semestre del año 2012, en el Consultorio número 10 del Policlínico Universitario "Hermanos Cruz". El universo (U=86 estuvo constituido por el total de adultos mayores diabéticos; la muestra quedó conformada por 52 adultos mayores diabéticos. Las variables estudiadas fueron: edad, sexo, tipo de maltrato recibido, notificación, principal agresor e identificar la necesidad de información sobre el tema. Para la recolección de información se diseñó y aplicó un cuestionario por el equipo de investigación. Se utilizó el porcentaje como medida de resumen. Resultados: el grupo de edad más maltratado fue el de 60 a 69 años, predominando el sexo femenino. Los agresores más cercanos resultaron ser los hijos. La muestra estudiada manifestó que existe una insuficiente divulgación sobre el tema. Conclusiones: en el consultorio donde se realizó la investigación existen manifestaciones de violencia intrafamiliar en adultos mayores diabéticos, a pesar de que la comunidad no la reconoce como uno de sus problemas de salud.

  7. Mayores e Internet: La Red como fuente de oportunidades para un envejecimiento activo

    Directory of Open Access Journals (Sweden)

    Carmen Llorente Barroso

    2015-07-01

    Full Text Available El progresivo envejecimiento de las sociedades ha llevado a los organismos internacionales y europeos a desarrollar programas de envejecimiento activo, capaces de construir una nueva cultura sobre el papel de las personas mayores en la sociedad. Estos incluyen aspectos sociales de carácter comunicacional que, sin embargo, han tenido menos desarrollo investigador que otros más apremiantes, vinculados a aspectos físicos y económicos. Esta investigación atiende precisamente a estas variables comunicacionales, abordando la vinculación de los mayores con Internet y planteándose dos objetivos principales: Conocer las utilidades que tiene Internet para este colectivo y explicar los motivos que convertirían a este medio en una fuente de oportunidades para un envejecimiento activo. Para satisfacerlos, se utiliza una metodología cualitativa que se apoya en el desarrollo de tres grupos de discusión constituidos por entre cinco y seis personas de 56 a 81 años y moderados por un experto. Los resultados obtenidos del análisis cualitativo del contenido en cada discusión indican que Internet es una fuente de oportunidades para los mayores, que pueden aglutinarse en cuatro categorías: informativas, comunicativas, transaccionales y administrativas, y de ocio y entretenimiento. Estas oportunidades optimizan la calidad de vida de los mayores y contribuyen a su envejecimiento activo, si bien, su máximo aprovechamiento precisa de programas de «e-Inclusion» y metodologías que aproximen Internet a los mayores, facilitándoles una formación en competencias digitales.

  8. Uso de medicamentos en adultos mayores de Bogotá, Colombia

    Directory of Open Access Journals (Sweden)

    Carlos Cano-Guitierrez

    Full Text Available Objetivos. Determinar la frecuencia y tipo de medicamentos que utiliza un grupo de adultos mayores que viven en lacapital colombiana, y cuáles son potencialmente inapropiados, con base en los criterios revisados de Beers. Materiales y métodos. Los datos fueron obtenidos del estudio SABE (estudio de salud, bienestar y envejecimiento que se llevó a cabo en áreas urbanas y rurales de Bogotá en el 2012. Se utilizó la prueba U de Mann-Whitney para analizar las diferencias por sexo en los diferentes grupo de edad con relación al número de medicamentos tomados. Resultados. Un total de 1268 (63,4% de los adultos mayores fueron mujeres; entre los participantes, 1514 (75,7% tenían 5 años de educación básica o menos. El promedio de medicamentos tomados en general fue de 3,24 siendo mayor en mujeres (3,50 que en hombres (2,79. Un total de 549 sujetos (27,4% reportaron recibir cinco medicamentos o más. De los medicamentos utilizados, 443 (6,9% eran potencialmente inapropiados de acuerdo con los criterios de Beers. La prevalencia autorreportada de hipertensión fue de 56,9% y para diabetes de 17,5%. Solo 311 sujetos (15,6% no tomaban ningún medicamento. Conclusiones. El uso de medicamentos inapropiados es un problema importante que afecta a los adultos mayores en Bogotá. Estudios adicionales deberán identificar factores que aumentan el riesgo de polifarmacia y uso inapropiado de medicamentos y diseñar intervenciones para prevenir el uso inapropiado de medicamentos entre adultos mayores.

  9. Valoración funcional del adulto mayor relacionado con el abandono familiar.

    Directory of Open Access Journals (Sweden)

    Jenny Fernanda Villarroel Vargas

    2017-03-01

    Full Text Available Introducción: Se estima que entre el 2000 al 2050 la población mundial envejecida ascenderá del 11% al 22 %, con ello el incremento de las diversas enfermedades o trastornos propios de la edad. Objetivo: Establecer la relación entre capacidad funcional del adulto mayor con el abandono familiar en el barrio La Calera Centro, Latacunga, 2015-2016. Métodos: Se realizó un estudio observacional descriptivo de corte trasversal, donde previo consentimiento informado participaron 70 adultos mayores, a quienes se les aplicó escalas para valoración de la capacidad funcional, así como la encuesta para valorar abandono familiar y aspectos sociodemográficos de la población. Para el análisis estadístico se utilizó el test de Chi Cuadrado de Pearson con un nivel de significancia del 0,05. Resultados: Se reportó el abandono en el 75,7% de los adultos mayores y tuvo significancia con respecto a la capacidad funcional y la estructura familiar (p=0,002. Hubo relación  entre capacidad funcional y abandono familiar, así como también predominio de los adultos mayores entre los 65 a 74 años, sexo femenino, sin ninguna actividad laboral y analfabetos. Hubo relación significativa entre capacidad funcional, edades geriátricas y ocupación; y de igual manera entre la estructura familiar y el abandono. La capacidad funcional y la estructura familiar fueron factores asociados al abandono.    Conclusiones: La dependencia del adulto mayor condicionó a diferentes tipos de maltrato, destacando el abandono familiar.

  10. Resiliencia en trabajadores y en residentes de un centro de personas mayores institucionalizadas

    Directory of Open Access Journals (Sweden)

    Inmaculada Méndez

    2015-04-01

    Full Text Available La resiliencia supone un constructo dinámico y multidimensional que alude a la capacidad que tienen las personas para afrontar o recuperarse con éxito de las situaciones adversas. El objetivo del presente estudio ha sido analizar la capacidad de resiliencia en trabajadores y en residentes de un centro de personas mayores institucionalizadas en función de las características sociodemográficas (sexo, edad y estado civil tras la situación adversa por el terremoto ocurrido el Lorca en mayo del 2011. Se ha administrado un cuestionario sociodemográfico desarrollado ad hoc junto a la adaptación de la Escala de Resiliencia de Connor-Davidson (CD-RISC en los sujetos del estudio. Los participantes fueron 20 trabajadores y 34 personas mayores de un centro de personas mayores institucionalizadas de la Región de Murcia (Lorca. La edad media de las personas mayores institucionalizadas fue de 81 años con una desviación típica de 7.68 y la edad media de los cuidadores profesionales fue de 37.85 años y la desviación típica de 9.60. El estudio permite determinar la capacidad de resiliencia atendiendo a características sociodemográficas así como la existencia de diferencias de medias significativas entre la capacidad de tenacidad autoeficacia entre los trabajadores y los residentes del centro de personas mayores lo que permitirá establecer actividades de prevención y/o de intervención.

  11. Reactivation in vitro of zinc-requiring apo-enzymes by rat liver zinc-thionein

    OpenAIRE

    Udom, Albert O.; Brady, Frank O.

    1980-01-01

    The ability of rat liver zinc-thionein to donate its metal to the apo-enzymes of the zinc enzymes horse liver alcohol dehydrogenase, yeast aldolase, thermolysin, Escherichia coli alkaline phosphatase and bovine erythrocyte carbonic anhydrase was investigated. Zinc-thionein was as good as, or better than, ZnSO4, Zn(CH3CO2)2 or Zn(NO3)2 in donating its zinc to these apo-enzymes. Apo-(alcohol dehydrogenase) could not be reactivated by zinc salts or by zinc-thionein. Incubation of the other apo-e...

  12. Zinc and the modulation of redox homeostasis

    Science.gov (United States)

    Oteiza, Patricia I.

    2012-01-01

    Zinc, a redox inactive metal, has been long viewed as a component of the antioxidant network, and growing evidence points to its involvement in redox-regulated signaling. These actions are exerted through several mechanisms based on the unique chemical and functional properties of zinc. Overall, zinc contributes to maintain the cell redox balance through different mechanisms including: i) the regulation of oxidant production and metal-induced oxidative damage; ii) the dynamic association of zinc with sulfur in protein cysteine clusters, from which the metal can be released by nitric oxide, peroxides, oxidized glutathione and other thiol oxidant species; iii) zinc-mediated induction of the zinc-binding protein metallothionein, which releases the metal under oxidative conditions and act per se scavenging oxidants; iv) the involvement of zinc in the regulation of glutathione metabolism and of the overall protein thiol redox status; and v) a direct or indirect regulation of redox signaling. Findings of oxidative stress, altered redox signaling, and associated cell/tissue disfunction in cell and animal models of zinc deficiency, stress the relevant role of zinc in the preservation of cell redox homeostasis. However, while the participation of zinc in antioxidant protection, redox sensing, and redox-regulated signaling is accepted, the involved molecules, targets and mechanisms are still partially known and the subject of active research. PMID:22960578

  13. Effects of zinc complexes on the distribution of zinc in calcareous soil and zinc uptake by maize.

    Science.gov (United States)

    Alvarez, José M; Rico, María I

    2003-09-10

    The movement and availability of Zn from six organic Zn sources in a Typic Xerorthent (calcareous) soil were compared by incubation, column assay, and in a greenhouse study with maize (Zea mays L.). Zinc soil behavior was studied by sequential, diethylenetriaminepentaacetate, and Mehlich-3 extractions. In the incubation experiment, the differences in Zn concentration observed in the water soluble plus exchangeable fraction strongly correlated with Zn uptake by plants in the greenhouse experiment. Zinc applied to the surface of soil columns scarcely moved into deeper layers except for Zn-ethylenediaminetetraacetate (EDTA) that showed the greatest distribution of labile Zn throughout the soil and the highest proportion of leaching of the applied Zn. In the upper part of the column, changes in the chemical forms of all treatments occurred and an increase in organically complexed and amorphous Fe oxide-bound fractions was detected. However, the water soluble plus exchangeable fraction was not detected. The same results were obtained at the end of the greenhouse experiment. Significant increases were found in plant dry matter yield and Zn concentration as compared with the control treatment without Zn addition. Increasing Zn rate in the soil increased dry matter yield in all cases but Zn concentration in the plant increased only with Zn-EDTA and Zn-ethylenediaminedi-o-hydroxyphenyl-acetate (EDDHA) fertilizers. Higher Zn concentration in plants (50.9 mg kg(-)(1)) occurred when 20 mg Zn kg(-)(1) was added to the soil as Zn-EDTA. The relative effectiveness of the different Zn carriers in increasing Zn uptake was in the order: Zn-EDTA > Zn-EDDHA > Zn-heptagluconate >/= Zn-phenolate approximately Zn-polyflavonoid approximately Zn-lignosulfonate.

  14. 65Zinc and endogenous zinc content and distribution in islets in relationship to insulin content

    International Nuclear Information System (INIS)

    Figlewicz, D.P.; Forhan, S.E.; Hodgson, A.T.; Grodsky, G.M.

    1984-01-01

    Uptake of 65 Zn and distribution of 65 Zn, total zinc, and insulin were measured in rat islets and islet granules under different conditions of islet culture. Specific activity of islet zinc ( 65 Zn/zinc) was less than 15% that of extracellular zinc even after 48 h. In contrast, once in the islet, 65 Zn approached 70% of equilibrium with granular zinc in 24 h and apparent equilibrium by 48 h. During a 24-h culture, at either high or low glucose, reduction of both islet zinc and insulin occurred. However, zinc depletion was greater than that predicted if zinc loss was proportional to insulin depletion and occurred only from the granular compartment, which represents only one third of the total islet zinc. Extension of culture to 48 h caused additional insulin depletion, but islet zinc was unchanged. Omission of calcium during the 48-h culture caused a predicted increase in insulin retention, presumably by inhibiting secretion; however, zinc retention was not increased proportionately. Pretreatment of rats with tolbutamide caused a massive depletion of insulin stored in isolated islets, with little change in total islet zinc; subsequent culture of these islets resulted in a greater loss of granular zinc than predicted from the small loss of granular insulin. None of the conditions tested affected the percentage of either 65 Zn or total zinc that was distributed in the islet granules. Results show that zinc exists in a metabolically labile islet compartment(s) as well as in secretory granules; and extra-granular zinc, although not directly associated with insulin storage, may act as a reservoir for granular zinc and may regulate insulin synthesis, storage, and secretion in ways as yet unknown

  15. Iron and Zinc Nutrition in the Economically-Developed World: A Review

    Directory of Open Access Journals (Sweden)

    Alison O. Booth

    2013-08-01

    Full Text Available This review compares iron and zinc food sources, dietary intakes, dietary recommendations, nutritional status, bioavailability and interactions, with a focus on adults in economically-developed countries. The main sources of iron and zinc are cereals and meat, with fortificant iron and zinc potentially making an important contribution. Current fortification practices are concerning as there is little regulation or monitoring of intakes. In the countries included in this review, the proportion of individuals with iron intakes below recommendations was similar to the proportion of individuals with suboptimal iron status. Due to a lack of population zinc status information, similar comparisons cannot be made for zinc intakes and status. Significant data indicate that inhibitors of iron absorption include phytate, polyphenols, soy protein and calcium, and enhancers include animal tissue and ascorbic acid. It appears that of these, only phytate and soy protein also inhibit zinc absorption. Most data are derived from single-meal studies, which tend to amplify impacts on iron absorption in contrast to studies that utilize a realistic food matrix. These interactions need to be substantiated by studies that account for whole diets, however in the interim, it may be prudent for those at risk of iron deficiency to maximize absorption by reducing consumption of inhibitors and including enhancers at mealtimes.

  16. Neodymium conversion layers formed on zinc powder for improving electrochemical properties of zinc electrodes

    International Nuclear Information System (INIS)

    Zhu Liqun; Zhang Hui; Li Weiping; Liu Huicong

    2008-01-01

    Zinc powder, as active material of secondary alkaline zinc electrode, can greatly limit the performance of zinc electrode due to corrosion and dendritic growth of zinc resulting in great capacity-loss and short cycle life of the electrode. This work is devoted to modification study of zinc powder with neodymium conversion films coated directly onto it using ultrasonic immersion method for properties improvement of zinc electrodes. Scanning electron microscopy and other characterization techniques are applied to prove that neodymium conversion layers are distributing on the surface of modified zinc powder. The electrochemical performance of zinc electrodes made of such modified zinc powder is investigated through potentiodynamic polarization, potentiostatic polarization and cyclic voltammetry. The neodymium conversion films are found to have a significant effect on inhibition corrosion capability of zinc electrode in a beneficial way. It is also confirmed that the neodymium conversion coatings can obviously suppress dendritic growth of zinc electrode, which is attributed to the amelioration of deposition state of zinc. Moreover, the results of cyclic voltammetry reveal that surface modification of zinc powder enhances the cycle performance of the electrode mainly because the neodymium conversion films decrease the amounts of ZnO or Zn(OH) 2 dissolved in the electrolyte

  17. Zinc stannate nanostructures: hydrothermal synthesis

    International Nuclear Information System (INIS)

    Baruah, Sunandan; Dutta, Joydeep

    2011-01-01

    Nanostructured binary semiconducting metal oxides have received much attention in the last decade owing to their unique properties rendering them suitable for a wide range of applications. In the quest to further improve the physical and chemical properties, an interest in ternary complex oxides has become noticeable in recent times. Zinc stannate or zinc tin oxide (ZTO) is a class of ternary oxides that are known for their stable properties under extreme conditions, higher electron mobility compared to its binary counterparts and other interesting optical properties. The material is thus ideal for applications from solar cells and sensors to photocatalysts. Among the different methods of synthesizing ZTO nanostructures, the hydrothermal method is an attractive green process that is carried out at low temperatures. In this review, we summarize the conditions leading to the growth of different ZTO nanostructures using the hydrothermal method and delve into a few of its applications reported in the literature. (topical review)

  18. Isolation and characterization of Lotus japonicus genes involved in iron and zinc homeostasis

    DEFF Research Database (Denmark)

    Cvitanich, Cristina; Jensen, Winnie; Sandal, Niels Nørgaard

    . Legumes are frequently grown in soil with limited nutrient availability. Plants use finely tuned mechanisms to keep appropriated levels of iron and zinc in each of their organs. Several genes involved in iron and zinc homeostasis have been described in yeast, and a few orthologs have been studied...... in plants. We have used these sequences to search for L. japonicus ESTs and genomic loci that are likely to be involved in iron and zinc metabolism. We have identified sequences corresponding to ferritins, ferric reductases, metal transport proteins of the ZIP family, and cation transporters of the NRAMP......The goal of this project is to find ways to improve the nutritional value of legumes by identifying genes and proteins important for iron and zinc regulation in the model legume Lotus japonicus. Legumes are important staples in the developing world and are a major source of nutrients in many areas...

  19. Zinc injection on the EDF pressurized light water reactors. Current results and operating experience feedback

    International Nuclear Information System (INIS)

    Piana, Olivier; Duval, Arnaud; Moleiro, Edgar; Benfarah, Moez; Bretelle, Jean-Luc; Chaigne, Guy

    2014-01-01

    Nowadays, zinc injection, as well as pH management and hydrogen control, is increasingly considered as an essential element of PWR Primary Water Chemistry worldwide. After a first implementation of zinc injection at Bugey 2 since 2004 and Bugey 4 since 2006, EDF decided to extend this practice, which constitutes a modification of primary circuit chemical conditioning, to other units of its fleet. Currently, 15 among the 58 reactors of the French fleet are injecting depleted zinc acetate into the primary coolant water. Three main goals were identified at the beginning of this program. Indeed, the expected benefits of zinc injection were: Reduction of the rate of generalized corrosion and mitigation of stress corrosion cracking initiation on nickel based alloys (Material goal). Curative or preventive reduction of radiation sources to which workers are exposed (Radiation fields' goal). Mitigation of the AOA or CIPS risks by reduction of corrosion products releases and mitigation of crud deposition (Fuel protection goal). To monitor the zinc addition, EDF has defined a complete survey program concerning: chemistry and radiochemistry responses (primary coolant monitoring of corrosion and fission products and calculation of zinc injected, zinc removed and zinc incorporated in RCS surfaces) ; radiation fields (dose rates and deposited activities measurements) ; materials (statistical analysis of SG tube cracks) ; fuel (oxide thickness measurements and visual exams) ; effluents (corrosion products releases and isotopic distribution follow up) ; wastes (radiochemical characterization of filters). This paper will detail the present results of this monitoring program. It appears that the expected benefits of zinc injection have yet to be fully realized; further operating experience will be required in order to fully evaluate its impact. (author)

  20. Envejecimiento poblacional y desigualdades sociales en la mortalidad del adulto mayor en Colombia

    Directory of Open Access Journals (Sweden)

    Juan Carlos Rivillas

    2017-09-01

    Full Text Available Objetivo: analizar la magnitud del envejecimiento poblacional y las desigualdades sociales presentes en la mortalidad del adulto mayor en Colombia. Metodología: estudio ecológico usando datos sub-nacionales de mortalidad, pobreza, barreras de acceso a los servicios de salud y analfabetismo, y de la población adulta mayor para analizar brechas. Se calcularon y compararon tendencias de tres indicadores de impacto: la esperanza de vida (2005-2020, los Índices de envejecimiento y sobre-envejecimiento (2005-2012. Se estimaron tres medidas para resumir la desigualdad absoluta y relativa: el Índice de Desigualdad de la Pendiente (IDP, el Índice Relativo de Desigualdad (IRD de Kunst y Mackenbach, y el Índice de Concentración (IC. Resultados: la proporción de personas mayores será cada vez mayor en Colombia. Las barreras de acceso a los servicios de salud fue la dimensión más inequitativa. Dos patrones de desigualdad fueron identificados: una exclusión marginal en el 60% de los adultos mayores con más ventajas y oportunidades, y un patrón de gradiente lineal presente solo en la incidencia de pobreza. El quintil 3 fue el grupo de departamentos más afectado por la inequidad a lo largo de las dimensiones evaluadas. Discusión: este estudio aporta evidencia sobre patrones de desigualdad en la mortalidad del adulto mayor. A nivel de tendencias, solo fue posible conocer que la brecha ha empeorado en incidencia de pobreza. Conclusiones: las recomendaciones se centran en cinco áreas de acción, para lograr un contexto deseable para el abordaje del envejecimiento poblacional y la reducción de las desigualdades, como desafíos del sistema de salud y de protección social, y que pueden socavar la realización progresiva de la cobertura universal en salud y el logro de los objetivos de desarrollo sostenible para 2030.

  1. Sobrecarga y calidad de vida del cuidador principal del adulto mayor

    Directory of Open Access Journals (Sweden)

    Jack Roberto Silva Fhon

    2016-09-01

    Full Text Available Objetivo: Determinar la sobrecarga de trabajo y la calidad de vida del cuidador principal del adulto mayor atendido en un consultorio de geriatría. Metodología: Estudio cuantitativo, descriptivo, de corte transversal, realizado con 183 adultos mayores y sus respectivos cuidadores atendidos en un consultorio de geriatría. Para la recolección de los datos, fueron utilizados los instrumentos de perfil demográfico para el adulto mayor y su cuidador Escala de Zarit y The Medical Outcomes Study 36-item (sf-36. El análisis se realizó por medio de la estadística descriptiva y de la prueba de correlación de Spearman, con un nivel de significancia de p ≤ 0,05. Resultados: En los adultos mayores, hubo predominio del sexo masculino; la edad promedio fue de 74,8 años y estaban casados/as. En los cuidadores, predominó el sexo femenino; la edad promedio fue de 44,3 años. El total de cuidadores tenían estudios superiores, estaban casados/as y eran hijos/as de los adultos mayores. Según la evaluación con la Escala de Zarit, el 18,1% presentó algún tipo de sobrecarga; en cuanto a la calidad de vida, las dimensiones con menor puntuación fueron Salud general, Salud mental y Vitalidad. Se obtuvo una correlación inversa entre la puntuación total de la Escala de Zarit y todas las dimensiones de la calidad de vida. Conclusión: Se observó que el desgaste de la calidad de vida se debe a la sobrecarga en el cuidado del adulto mayor. Por lo tanto, se hace necesario acompañar el estado de salud de los cuidadores con la finalidad de prevenir alteraciones físicas y mentales.

  2. Perfil de los adultos mayores usuarios de atención primaria

    Directory of Open Access Journals (Sweden)

    Fabianne de Jesus Dias de Sousa

    2017-05-01

    Full Text Available Introducción: Las proyecciones indican que Brasil será el sexto país del mundo con el mayor número de adultos mayores. El objetivo de este estudio fue caracterizar las condiciones de perfil y de vida socio-demográficos y de salud de los usuarios adultos mayores de la atención primaria de un municipio en la región amazónica del Brasil. Es oportuno porque el envejecimiento de la población está creciendo rápidamente, especialmente en países en desarrollo como el Brasil. Materiales y Métodos: Estudio transversal con una muestra de 441 individuos con edad inferior a 60 años de la población de usuarios de la atención básica en el municipio de Benevides, en la Amazonia brasileña. Os datos fueron obtenidos a través del Elder notebook, un protocolo clínico del Ministerio de la Salud. La prueba del chi-cuadrado con un nivel de significancia de 5% para explorar fue utilizada las asociaciones entre las variables de las condiciones de salud y de vida, y las variables socio-demográficas. Resultados: Se presentaron un perfil predominantemente joven adultos mayores (46.0%, que no practican actividad física (p<0.02, con condiciones crónicas y uso de drogas para inducir el sueño (p<0.05. Discusión y Conclusiones: El perfil de vida desfavorable y de salud encontrados en adultos mayores exige la adopción de medidas reforzadas, sobre la salud y los presupuestos de atención integral como un desafío para efectuar la colocación de sus necesidades, principalmente por la enfermería, en la Atención Básica de Salud en áreas más necesitadas de la región amazónica. Cómo citar este artículo: Sousa FJD, Andrade FS. Perfil de los adultos mayores usuarios de atención primaria. Rev Cuid. 2017; 8(2: 1573-81. http://dx.doi.org/10.15649/cuidarte.v8i2.376

  3. Electroplated zinc-cobalt alloy

    International Nuclear Information System (INIS)

    Carpenter, D.E.O.S.; Farr, J.P.G.

    2005-01-01

    Recent work on the deposition and use of ectrodeposited zinc-cobalt alloys is surveyed. Alloys containing lower of Nuclear quantities of cobalt are potentially more useful. The structures of the deposits is related to their chemical and mechanical properties. The inclusion of oxide and its role in the deposition mechanism may be significant. Chemical and engineering properties relate to the metallurgical structure of the alloys, which derives from the mechanism of deposition. The inclusion of oxides and hydroxides in the electroplate may provide evidence for this mechanism. Electrochemical impedance measurements have been made at significant deposition potentials, in alkaline electrolytes. These reveal a complex electrode behaviour which depends not only on the electrode potential but on the Co content of the electrolyte. For the relevant range of cathodic potential zinc-cobalt alloy electrodeposition occurs through a stratified interface. The formation of an absorbed layer ZnOH/sup +/ is the initial step, this inhibits the deposition of cobalt at low cathodic potentials, so explaining its 'anomalous deposition'. A porous layer of zinc forms on the adsorbed ZnOH/sup +/ at underpotential. As the potential becomes more cathodic, cobalt co- deposits from its electrolytic complex forming a metallic solid solution of Co in Zn. In electrolytes containing a high concentration of cobalt a mixed entity (ZnCo)/sub +/ is assumed to adsorb at the cathode from which a CoZn intermetallic deposits. (author)

  4. Effects of dietary zinc status on seizure susceptibility and hippocampal zinc content in the El (epilepsy) mouse.

    Science.gov (United States)

    Fukahori, M; Itoh, M

    1990-10-08

    The effects of dietary zinc status on the development of convulsive seizures, and zinc concentrations in discrete hippocampal areas and other parts of the limbic system were studied in the El mouse model receiving zinc-adequate, zinc-deficient or zinc-loaded diets. Seizure susceptibility of the El mouse was increased by zinc deficiency, and decreased by zinc loading, while an adequate diet had no effect. Zinc loading was accompanied by a marked increase in hippocampal zinc content in the El mouse. Conversely, hippocampal zinc content declined in the El mouse fed a zinc-deficient diet. These results suggest that zinc may have a preventive effect on the development of seizures in the El mouse, and hippocampal zinc may play an important role in the pathophysiology of convulsive seizures of epilepsy.

  5. Zinc in Cellular Regulation: The Nature and Significance of "Zinc Signals".

    Science.gov (United States)

    Maret, Wolfgang

    2017-10-31

    In the last decade, we witnessed discoveries that established Zn 2+ as a second major signalling metal ion in the transmission of information within cells and in communication between cells. Together with Ca 2+ and Mg 2+ , Zn 2+ covers biological regulation with redox-inert metal ions over many orders of magnitude in concentrations. The regulatory functions of zinc ions, together with their functions as a cofactor in about three thousand zinc metalloproteins, impact virtually all aspects of cell biology. This article attempts to define the regulatory functions of zinc ions, and focuses on the nature of zinc signals and zinc signalling in pathways where zinc ions are either extracellular stimuli or intracellular messengers. These pathways interact with Ca 2+ , redox, and phosphorylation signalling. The regulatory functions of zinc require a complex system of precise homeostatic control for transients, subcellular distribution and traffic, organellar homeostasis, and vesicular storage and exocytosis of zinc ions.

  6. Roadside soils show low plant available zinc and copper concentrations.

    Science.gov (United States)

    Morse, Natalie; Walter, M Todd; Osmond, Deanna; Hunt, William

    2016-02-01

    Vehicle combustion and component wear are a major source of metal contamination in the environment, which could be especially concerning where road ditches are actively farmed. The objective of this study was to assess how site variables, namely age, traffic (vehicles day(-1)), and percent carbon (%C) affect metal accumulation in roadside soils. A soil chronosequence was established with sites ranging from 3 to 37 years old and bioavailable, or mobile, concentrations of Zinc (Zn) and Copper (Cu) were measured along major highways in North Carolina using a Mehlich III extraction. Mobile Zn and Cu concentrations were low overall, and when results were scaled via literature values to "total metal", the results were still generally lower than previous roadside studies. This could indicate farming on lands near roads would pose a low plant toxicity risk. Zinc and Cu were not correlated with annual average traffic count, but were positively correlated with lifetime traffic load (the product of site age and traffic count). This study shows an often overlooked variable, site age, should be included when considering roadside pollution accumulation. Zinc and Cu were more strongly associated with %C, than traffic load. Because vehicle combustion is also a carbon source, it is not obvious whether the metals and carbon are simply co-accumulating or whether the soil carbon in roadside soils may facilitate previously overlooked roles in sequestering metals on-site. Copyright © 2015 Elsevier Ltd. All rights reserved.

  7. Zinc and immunity: An essential interrelation.

    Science.gov (United States)

    Maares, Maria; Haase, Hajo

    2016-12-01

    The significance of the essential trace element zinc for immune function has been known for several decades. Zinc deficiency affects immune cells, resulting in altered host defense, increased risk of inflammation, and even death. The micronutrient zinc is important for maintenance and development of immune cells of both the innate and adaptive immune system. A disrupted zinc homeostasis affects these cells, leading to impaired formation, activation, and maturation of lymphocytes, disturbed intercellular communication via cytokines, and weakened innate host defense via phagocytosis and oxidative burst. This review outlines the connection between zinc and immunity by giving a survey on the major roles of zinc in immune cell function, and their potential consequences in vivo. Copyright © 2016 Elsevier Inc. All rights reserved.

  8. BWR radiation buildup control with ionic zinc

    International Nuclear Information System (INIS)

    Marble, W.J.; Wood, C.J.; Leighty, C.E.; Green, T.A.

    1986-01-01

    In 1983 a hypothesis was disclosed which suggested that the presence of ionic zinc in the reactor water of the BWR could reduce radiation buildup. This hypothesis was developed from correlations of plant data, and subsequently, from laboratory experiments which demonstrated clearly that ionic zinc inhibits the corrosion of stainless steel. The benefits of zinc addition have been measured at the Vallecitos Nuclear Center under and EPRI/GE project. Experimentation and analyses have been performed to evaluate the impact of intentional zinc addition on the IGSCC characteristics of primary system materials and on the performance of the nuclear fuel. It has been concluded that no negative effects are expected. The author conclude that the intentional addition of ionic zinc to the BWR reactor water at a concentration of approximately 10 ppb will provide major benefits in controlling the Co-60 buildup on primary system stainless steel surfaces. The intentional addition of zinc is now a qualified technique for use in BWRs

  9. Vitamina B12, Acido Fólico y Función Mental en Adultos Mayores

    OpenAIRE

    Meertens-R, Lesbia; Solano-R, Liseti

    2005-01-01

    Los adultos mayores constituyen un grupo de población vulnerable a cuadros de deficiencias de nutrientes específicos como la vitamina B12 y el ácido fólico, íntimamente ligados al deterioro de las funciones mentales, en especial, del área cognitiva. El objetivo de este estudio fue determinar indicadores del estado de vitamina B12 y ácido fólico y asociarlos a la evaluación de la función mental de 53 adultos mayores de 60 años de edad, residenciados en un hogar geriátrico. Se evaluó consumo di...

  10. OPTIMALISASI PELAKSANAAN KURIKULUM SISTEM MAYOR-MINOR PROGRAM PENDIDIKAN SARJANA INSTITUT PERTANIAN BOGOR

    Directory of Open Access Journals (Sweden)

    Sutoro Sutoro

    2016-09-01

    Full Text Available This study aims to 1 evaluate the implementation of major-minor curriculum system in IPB Undergraduate Program, 2 identify factors leading to less optimized implementation of the major-minor curriculum system in IPB Undergraduate Program and 3 design strategies to optimize the implementation of the major-minor curriculum system in IPB Undergraduate Program. Analytical Hierarchy Process was utilized as the method of study. The results showed that the implementation of the major-minor curriculum system in IPB Undergraduate Program is still considered to be less optimal. Factors influencing the implementation of the major-minor curriculum system in IPB Undergraduate Program, according to its priority, include: 1 the availability of competent and committed teaching staffs, 2 the availability of adequate lecturing facilities and infrastructure, 3 the availability of lecture schedule to accommodate students who choose minor curriculum, and 4 the availability of reliable and IT-based Academic Information System (SIMAK. Strategies to optimize the implementation of major-minor curriculum system in IPB Undergraduate Program, according to its priority, include; 1 improving the competence and commitment of teaching and educational staffs, 2 increasing the commitment of departments and faculties to facilitate the fulfillment of minor  curriculum schedules, 3 providing adequate facilities and infrastructure to implement the major and minor curriculum system, and 4 providing lecture schedules that can accommodate the needs of students who choose minor curriculum.Keywords: analytical hierarchy process, optimization, major-minor curriculum systemABSTRAKPenelitian ini bertujuan 1 mengevaluasi pelaksanaan kurikulum sistem mayor-minor pada Program Pendidikan Sarjana IPB, 2 mengidentifikasi faktor-faktor yang menyebabkan kurang optimalnya pelaksanaan kurikulum sistem mayor-minor pada Program Pendidikan Sarjana IPB dan 3 merancang strategi untuk mengoptimalkan

  11. Fuzzy logic and information fusion to commemorate the 70th birthday of Professor Gaspar Mayor

    CERN Document Server

    Sastre, Joan

    2016-01-01

    This book offers a timely report on key theories and applications of soft-computing. Written in honour of Professor Gaspar Mayor on his 70th birthday, it primarily focuses on areas related to his research, including fuzzy binary operators, aggregation functions, multi-distances, and fuzzy consensus/decision models. It also discusses a number of interesting applications such as the implementation of fuzzy mathematical morphology based on Mayor-Torrens t-norms. Importantly, the different chapters, authored by leading experts, present novel results and offer new perspectives on different aspects of Mayor’s research. The book also includes an overview of evolutionary fuzzy systems, a topic that is not one of Mayor’s main areas of interest, and a final chapter written by the Spanish pioneer in fuzzy logic, Professor E. Trillas. Computer and decision scientists, knowledge engineers and mathematicians alike will find here an authoritative overview of key soft-computing concepts and techniques.

  12. RELACIÓN MÉDICO PACIENTE: DERECHOS DEL ADULTO MAYOR

    Science.gov (United States)

    Barrantes-Monge, Melba; Rodríguez, Eduardo; Lama, Alexis

    2009-01-01

    Existen prejuicios en relación con la vejez, incluso entre los profesionales que se dedican a la gerontología. Uno común y peligroso es considerar que los viejos son todos enfermos o discapacitados. La relación médico-paciente es la piedra angular de la práctica y ética médicas. Para alcanzar el respeto por los adultos mayores es necesaria una medicina prudente, basada en una práctica en la cual la reflexión ética y clínica pueda contribuir. Esto último es posible si se hacen valer los derechos del adulto mayor, en particular como paciente para la toma de decisiones. PMID:20379380

  13. La obesidad en las personas mayores, un problema de salud pública

    OpenAIRE

    Abellán García, Antonio

    2016-01-01

    La obesidad es un serio problema de salud pública. Se suele medir utilizando el Índice de Masa Corporal. En España, un 23,6% de las personas mayores (65 y más años) tiene obesidad, y otro 45,0% sobrepeso, según la última Encuesta Europea de Salud (2014). Sólo un 30,0% está en un peso normal. En el resto de adultos también se observa esta circunstancia. Es decir, en España existe un problema de sobrepeso y obesidad, especialmente entre los mayores y estas cifras son peores que la media de la ...

  14. Burnout e intenciones de jubilación anticipada entre empleados mayores - Burnout and early retirement intentions among older employees

    NARCIS (Netherlands)

    Henkens, C.J.I.M.; Leenders, M.

    2009-01-01

    El tema central de este artículo es la jubilación y el burnout de los empleados mayores. Analizamos si existe una relación entre las dimensiones de agotamiento emocional y despersonalización características del burnout y las intenciones de jubilación de los empleados mayores. Asimismo, se investiga

  15. Attitudes and Perceptions of Vocational Education in New York City: Implications for the Mayor's School Reform Initiative

    Science.gov (United States)

    Green, Rupert

    2012-01-01

    Under-performing New York City (NYC) schools precipitated Mayor Michael Bloomberg's decision to advance a vocational education initiative. The initiative was to address the problem of the many city high school graduates lacking both the skills for gainful employment and the academic preparedness to pursue higher education. The mayor's initiative…

  16. Efectos contextuales asociados a la variabilidad del riesgo de depresión en adultos mayores, Antioquia, Colombia, 2012

    Directory of Open Access Journals (Sweden)

    Doris Cardona

    2015-03-01

    Conclusiones. El municipio y la manzana de residencia aportaron 10 % de la variabilidad total del riesgo de depresión en los adultos mayores. Esta información es importante para fomentar la participación y adhesión de los adultos mayores a grupos comunitarios.

  17. Directed spatial organization of zinc oxide nanostructures

    Science.gov (United States)

    Hsu, Julia [Albuquerque, NM; Liu, Jun [Richland, WA

    2009-02-17

    A method for controllably forming zinc oxide nanostructures on a surface via an organic template, which is formed using a stamp prepared from pre-defined relief structures, inking the stamp with a solution comprising self-assembled monolayer (SAM) molecules, contacting the stamp to the surface, such as Ag sputtered on Si, and immersing the surface with the patterned SAM molecules with a zinc-containing solution with pH control to form zinc oxide nanostructures on the bare Ag surface.

  18. Activity incorporation into zinc doped PWR oxides

    International Nuclear Information System (INIS)

    Maekelae, Kari

    1998-01-01

    Activity incorporation into the oxide layers of PWR primary circuit constructional materials has been studied in Halden since 1993. The first zinc injection tests showed that zinc addition resulted in thinner oxide layers on new metal surfaces and reduced further incorporation of activity into already existing oxides. These tests were continued to find out the effects of previous zinc additions on the pickup of activity onto the surface oxides which were subsequently exposed to zinc-free coolant. The results showed that previous zinc addition will continue to reduce the rate of Co-60 build-up on out-of-core surfaces in subsequent exposure to zinc-free coolants. However, the previous Zn free test was performed for a relatively short period of time and the water chemistry programme was continued to find out the long term effects for extended periods without zinc. The activity incorporation into the stainless steel oxides started to increase as soon as zinc dosing to the coolant was stopped. The Co-60 concentration was lowest on all of the coupons which were first oxidised in Zn containing primary coolant. After the zinc injection period the thickness of the oxides increased, but activity in the oxide films did not increase at the same rate. This could indicate that zinc in the oxide blocks the adsorption sites for Co-60 incorporation. The Co-60 incorporation rate into the oxides on Inconel 600 seemed to be linear whether the oxide was pre-oxidised with or without Zn. The results indicate that zinc can either replace or prevent cobalt transport in the oxides. The results show that for zinc injection to be effective it should be carried out continuously. Furthermore the actual mechanism by which Zn inhibits the activity incorporation into the oxides is still not clear. Therefore, additional work has to follow with specified materials to verify the conclusions drawn in this work. (author)

  19. Nivel de sobrecarga en los cuidadores informales primarios de adultos mayores hospitalizados

    OpenAIRE

    Diaz Jardon, Gerardo

    2014-01-01

    México vive una transición demográfica un perfil caracterizado por edades avanzados, de acuerdo con el Instituto Nacional de Geografía y Estadística, en 2010, el grupo de población de personas mayores de 60 años es de 10.1 millones lo que representa el 9 % de acuerdo con ls proyecciones demográficas del Consejo Nacional de Poblacion

  20. Colegiales mayores de Castilla en la Italia española

    Directory of Open Access Journals (Sweden)

    Pere MOLAS RIBALTA

    2009-12-01

    Full Text Available La importancia de los seis Colegios Mayores de las universidades castellanas de Salamanca, Valladolid y Alcalá en la selección del personal judicial y político de la Monarquía española de los siglos XVI, XVII y XVIII es un hecho histórico bien conocido en sus líneas generales y actualizado por nuevas y rigurosas investigaciones.

  1. Estereotipos negativos hacia la vejez en personas mayores de Latinoamérica

    Directory of Open Access Journals (Sweden)

    Viviana X. Lasagni Colombo

    2014-03-01

    Full Text Available Introducción: Los objetivos del estudio se centran en investigar la presencia de estereotipos hacia la vejez en adultos mayores de diez países de Latinoamérica. Comparar el nivel de estereotipos entre países y evaluar la influencia de variables socio-demográficas en la formación de estereotipos. Metodología: Se realizó un estudio descriptivo transversal en adultos mayores de 60 a 70 años (N: 965 residentes en diez países de Latinoamérica. Se aplicó el Cuestionario de Estereotipos Negativos hacia la Vejez (CENVE y se estudió las posibles asociaciones entre variables socio demográficas y los factores del CENVE a través del análisis de varianzas (ANOVA. Los resultados demuestran que existen estereotipos negativos hacia la vejez en las personas mayores siendo más baja la presencia de estos en el factor motivacional. Se comprobó la relación significativa con variables “ocupación” y “nivel de escolaridad” y se corroboró la diferencia en la presencia de estereotipos negativos hacia la vejez entre los países que conforman este estudio. Conclusión: existen estereotipos negativos hacia la vejez en las personas mayores con diferencias entre grupos de países fundamentalmente por las condiciones sociosanitarias, educativas y económicas por las que atraviesan. El nivel de escolaridad y la situación socioeconómica influyen en la construcción de estereotipos negativos hacia la vejez.

  2. Prevalencia de hipertensión en adultos mayores de Costa Rica

    Directory of Open Access Journals (Sweden)

    Rosero-Bixby, Luis

    2007-07-01

    Full Text Available Este artículo estima la prevalencia de hipertensión (controlada y con o sin diagnóstico previo entre los adultos mayores costarricenses. Valora los problemas de medición y explora los factores asociados con la enfermedad. Se utilizan datos de una muestra nacional representativa del proyecto CRELES: “Costa Rica: Estudio de Longevidad y Envejecimiento Saludable”. Se realizaron dos mediciones de la presión arterial con monitores digitales a una muestra de 3000 adultos y se registró el auto reporte de la enfermedad y el uso de medicamentos antihipertensivos. La segunda medición resultó en valores significativamente menores tanto para la presión diastólica como para la sistólica. No se detectaron sesgos en la medición realizada por entrevistador ni por trimestre de trabajo de campo. El 59% de los adultos mayores del país sufre de hipertensión (HTA. La prevalencia es mayor entre las mujeres que entre los hombres. El 16% de todos los adultos mayores no tenían diagnóstico previo de HTA pero en nuestras mediciones resultaron con HTA. Los principales co-factores de HTA identificados en este artículo son: edad, estar asegurado, el índice de masa corporal, los antecedentes familiares, tener menos de 6 años de educación formal, ser fumador activo y consumir más de 3000 calorías al día.

  3. The copal of the Chichen Itza offerings and of the Templo Mayor of Tenochtitlan

    International Nuclear Information System (INIS)

    Montufar L, A.; Gutierrez W, C.E.; Mendoza A, D.; Torres M, A.

    2006-01-01

    Literature from the post conquest shows that the Mayans used copal resins in their religious celebrations and ceremonial rites, specially as a sahumerio material. Historical precedents have been fully documented, establishing its use in the calendar ceremonies performed by the Aztecs towards their agricultural practices, mainly for the corn crop; and that according to the registries of sacred figures of their gods, they were made out of copal resin. Abundant fragments of this resin were found in a number of offerings at the digging of the Templo Mayor of Tenochtitlan. These facts indicate the intensive use of the copal as a link with divinities of life, maintenance and fertility, among many other aspects of existence, as stated by the Mexicas cosmos view. In order to determine the possible origin of the different types of copal, small samples were analyzed by infrared spectroscopy, both from Chichen Itza and the pre hispanic from Templo Mayor of Tenochtitlan. Results show a great similarity between each absorption band, the one from Templo Mayor and the modern sample Bursera bipinnata and the one from Chichen Itza and the modem resin of Protium copal. This suggests that the pre hispanic copal form Chichen Itza was obtained from the Protium copal tree. (Author)

  4. Cuidado popular de familias con un adulto mayor sobreviviente del primer accidente cerebrovascular

    Directory of Open Access Journals (Sweden)

    Lucero López-Díaz

    2016-01-01

    Full Text Available Introducción: el accidente cerebrovascular afecta a numerosas personas en el mundo y se constituye en la principal causa de muer- te. Los sobrevivientes pueden padecer discapacidad y sufrir modificaciones en las actividades cotidianas. La familia es el principal apoyo del sobreviviente y al ser parte de una misma cultura, construye acciones de cuidado en búsqueda del bienestar. Objetivo: describir las acciones del cuidado popular de las familias con un adulto mayor sobreviviente del primer accidente cerebrovascular. Método: estudio etnográfico, con observación participante y entrevistas en profundidad. Participaron siete familias bogotanas (siete adultos mayores entre los dos y diez meses posteriores al primer accidente cerebrovascular y los siete cuidadores principales respectivos. Resultados: cuidadores y adulto mayor comparten acciones de cuidado para la recuperación, relacionadas con la alimentación, el cuidado personal y la ingesta de medicamentos permeadas por la creencia religiosa, fuente de soporte y vínculo afectivo. Conclusión: conocer el cuidado popular de esta población posibilita proponer acciones culturalmente congruentes con sus valores y creencias para potencializar las ca- pacidades familiares e intermediar en los procesos de tratamiento.

  5. El mundo afectivo de adultos mayores en situación de dependencia y sus cuidadores

    Directory of Open Access Journals (Sweden)

    Juana Rosa Hidalgo-Martinola

    2015-12-01

    Full Text Available El objetivo del presente trabajo es caracterizar la relación interpersonal entre cuidadores informales primarios y adultos mayores en situación de dependencia, a partir, de un estudio de casos múltiples. Se empleó la metodología cualitativa y el método etnometodológico. Se seleccionaron tres casos, por la presencia de diferentes grados de dependencia en los adultos mayores. Las técnicas empleadas fueron: entrevista en profundidad, escala de evaluación funcional y la observación abierta.Los principales resultados muestran que las relaciones interpersonales entre un cuidador informal primario y un adulto mayor en situación de dependencia, actualizan la historia de la relación anterior, generando vivencias de frustración y/o satisfacción en función de la dinámica pasada. Este proceso primario adquiere más trascendencia que las propias habilidades comunicativas en la relación y marcan una vivencia de la relación, que en algunos casos, se diferencia de la vivencia de la labor del cuidado.

  6. Salud y calidad de vida de cuidadores familiares y profesionales de personas mayores dependientes: estudio comparativo

    Directory of Open Access Journals (Sweden)

    Noelia Flores

    2014-08-01

    Full Text Available El trabajo que se presenta tiene como objetivo analizar las semejanzas y diferencias en la salud y en la calidad de vida de los cuidadores familiares y profesionales que atienden a personas mayores en situación de dependencia. Concretamente se presentan los resultados obtenidos tras la evaluación de 600 cuidadores de los cuales un 33,83% son familiares y un 66,17% son profesionales, a quienes se evaluó la carga o estrés experimentado, la salud física y psicológica y la calidad de vida general, laboral, familiar y social. Los resultados obtenidos indican que existen diferencias entre ambos grupos de cuidadores. Los familiares dedicados al cuidado presentan mayores niveles de sobrecarga y tienen una peor salud física y psicológica como consecuencia de la atención prestada al dependiente. Los cuidadores profesionales experimentan una mayor satisfacción con la vida en general y con otros factores como el trabajo, la familia y las relaciones sociales. Finalmente se justifica la necesidad de poner en marcha intervenciones de mejora de la salud de los cuidadores

  7. Patronage or Signaling: How Mayors Use City Payroll to Stay in Office

    Directory of Open Access Journals (Sweden)

    Vobolevičius Vincentas

    2016-12-01

    Full Text Available Several studies on municipal hiring decisions have indicated that when a city’s payroll grows, its mayor’s re-election prospects are likely to improve. It is not clear, however, if such an effect is attributable to patronage-driven, or signaling-driven, behavior of the incumbents. The difference is important: patronage leads to inefficient public administration, while signaling can produce political business cycles. In this paper, I propose some key electoral implications of patronage-driven and signaling-driven hiring, and verify them with data on local elections in Bulgaria (2015 and 2011 and in Poland (2014. I find that a large municipal workforce has a negative overall effect on mayors’ re-election. Importantly, the impact of city payroll varies with incumbents’ partisanship (strongly negative for mayors representing the economic right, neutral for independent mayors, positive for ex-communist mayors and does not depend on the duration of incumbent’s tenure. These findings strongly support the patronage-driven explanation of Eastern Europe’s local political economy.

  8. MÉXICO Y ESTADO DE GUANAJUATO: TRANSFERENCIAS INTERGENERACIONALES HACIA LOS ADULTOS MAYORES*

    Science.gov (United States)

    Montes de Oca, Verónica; Hebrero, Mirna

    2017-01-01

    RESUMEN En México, las transferencias formales e informales destinadas al apoyo de las personas adultas mayores son diversificadas. En este documento se analizan la tendencia nacional y los resultados de un estudio centrado en la entidad federativa de Guanajuato. La distribución de los apoyos confirma que las transferencias hechas por el sistema de seguridad social tienen un sesgo urbano y que las transferencias formales del gobierno federal se orientan a las áreas menos urbanizadas, particularmente las zonas rurales. A pesar de las transferencias formales (esporádicas e insuficientes), las necesidades económicas y de salud de las personas mayores persisten y ello lleva a que sus familiares realicen transferencias informales de naturaleza ascendente. En México —y más concretamente en Guanajuato— el apoyo de quienes residen con la persona mayor tiene un significativo peso, y lo contrario sucede con el de quienes han migrado. A partir de este material, se analiza el rol que, de acuerdo a su cohorte y su condición migratoria, desempeñan los descendientes. En todo caso, queda de manifiesto que, en cada entidad nacional, las dinámicas de transferencias intergeneracionales son de diversos tipos. PMID:29375179

  9. Exceso de peso y discapacidad en las personas mayores de la Argentina

    Directory of Open Access Journals (Sweden)

    Malena Monteverde

    2015-01-01

    Full Text Available El objetivo del presente trabajo es analizar la relación entre el exceso de peso y la condición de discapacidad en las personas mayores de la Argentina y evaluar en qué medida podría estar operando algún factor protector que reduzca o atenúe el efecto del exceso de peso sobre la pérdida de capacidades funcionales en las personas mayores de 64 años. Para ello se utilizan los microdatos de la Encuesta Nacional de Factores de Riesgo 2009. Con el objeto de medir la asociación entre sobrepeso, obesidad y la condición de discapacidad, así como la interacción de la condición de peso y la edad, se estiman modelos de regresión logística. Los resultados indican que, si bien el sobrepeso y la obesidad tendrían un efecto neto positivo sobre la presencia de discapacidades, este sería menor entre las personas de 64 años y más. Los resultados sugieren que entre las personas mayores existe algún factor protector, que si bien no revierte la relación directa entre exceso de peso y discapacidad, parece atenuarla.

  10. Non-Chromate Passivation of Zinc

    DEFF Research Database (Denmark)

    Tang, Peter Torben; Bech-Nielsen, G.

    1993-01-01

    Phos). The treatments are within the same concentration region, and they have a mutual pat-ent pending. Although some tests still need to be conducted, the following aspects are clear at the present time: The general appearance of the passivated zinc surface is very similar to a standard yellow chromate treatment...... successfully. The corrosion resistance against white rust on zinc and zinc alloys is just as good as that of yellow chromate, although the result de-pends on the corrosion test method as well as on the nature of the zinc substrate pas-sivated. The passivation procedure is simply a dip for approxi-mately 2...

  11. Status of zinc injection in PWRs

    Energy Technology Data Exchange (ETDEWEB)

    Bergmann, C.A. [Westinghouse Electric Co., Pittsburgh, PA (United States)

    1995-03-01

    Based on laboratory and other studies, it was concluded that zinc addition in a PWR primary coolant should result in reduced Alloy 600 PWSCC and general corrosion rates of the materials of construction. Because of these positive results, a Westinghouse Owner`s Subgroup, EPRI, and Westinghouse provided funds to continue the development and application of zinc in an operating plant. As part of the program, Southern Operating Nuclear Company agreed to operate the Farley 2 plant with zinc addition as a demonstration test of the effectiveness of zinc. Since zinc is incorporated in the corrosion oxide film on the primary system surfaces and Farley 2 is a mature plant, it was estimated that about 10 kgs of zinc would be needed to condition the plant before an equilibrium value in the coolant would be reached. The engineered aspects of a Zinc Addition and Monitoring System (ZAMS) considered such items as the constitutents, location, sizing and water supply of the ZAMS. Baseline data such as the PWSCC history of the Alloy 600 steam generator tubing, fuel oxide thickness, fuel crud deposits, radiation levels, and RCP seal leak-off rates were obtained before zinc addition is initiated. This presentation summarizes some of the work performed under the program, and the status of zinc injection in the Farley 2 plant.

  12. Zinc absorption in inflammatory bowel disease

    International Nuclear Information System (INIS)

    Valberg, L.S.; Flanagan, P.R.; Kertesz, A.; Bondy, D.C.

    1986-01-01

    Zinc absorption was measured in 29 patients with inflammatory bowel disease and a wide spectrum of disease activity to determine its relationship to disease activity, general nutritional state, and zinc status. Patients with severe disease requiring either supplementary oral or parenteral nutrition were excluded. The mean 65ZnCl2 absorption, in the patients, determined using a 65Zn and 51Cr stool-counting test, 45 +/- 17% (SD), was significantly lower than the values, 54 +/- 16%, in 30 healthy controls, P less than 0.05. Low 65ZnCl2 absorption was related to undernutrition, but not to disease activity in the absence of undernutrition or to zinc status estimated by leukocyte zinc measurements. Mean plasma zinc or leukocyte zinc concentrations in patients did not differ significantly from controls, and only two patients with moderate disease had leukocyte zinc values below the 5th percentile of normal. In another group of nine patients with inflammatory bowel disease of mild-to-moderate severity and minimal nutritional impairment, 65Zn absorption from an extrinsically labeled turkey test meal was 31 +/- 10% compared to 33 +/- 7% in 17 healthy controls, P greater than 0.1. Thus, impairment in 65ZnCl2 absorption in the patients selected for this study was only evident in undernourished persons with moderate or severe disease activity, but biochemical evidence of zinc deficiency was uncommon, and clinical features of zinc depletion were not encountered

  13. Maternal Zinc Intakes and Homeostatic Adjustments during Pregnancy and Lactation

    Science.gov (United States)

    Donangelo, Carmen Marino; King, Janet C.

    2012-01-01

    Zinc plays critical roles during embryogenesis, fetal growth, and milk secretion, which increase the zinc need for pregnancy and lactation. Increased needs can be met by increasing the dietary zinc intake, along with making homeostatic adjustments in zinc utilization. Potential homeostatic adjustments include changes in circulating zinc, increased zinc absorption, decreased zinc losses, and changes in whole body zinc kinetics. Although severe zinc deficiency during pregnancy has devastating effects, systematic reviews and meta-analysis of the effect of maternal zinc supplementation on pregnancy outcomes have consistently shown a limited benefit. We hypothesize, therefore, that zinc homeostatic adjustments during pregnancy and lactation improve zinc utilization sufficiently to provide the increased zinc needs in these stages and, therefore, mitigate immediate detrimental effects due to a low zinc intake. The specific questions addressed are the following: How is zinc utilization altered during pregnancy and lactation? Are those homeostatic adjustments influenced by maternal zinc status, dietary zinc, or zinc supplementation? These questions are addressed by critically reviewing results from published human studies on zinc homeostasis during pregnancy and lactation carried out in different populations worldwide. PMID:22852063

  14. High Discharge Rate Electrodeposited Zinc Electrode for Use in Alkaline Microbattery

    Directory of Open Access Journals (Sweden)

    A. L. Nor Hairin

    2012-01-01

    Full Text Available High discharge rate zinc electrode is prepared from electrodeposition process. The electrolytic bath consists of zinc chloride as the metal source and ammonium chloride as the supporting electrolyte. The concentration of the supporting electrolyte is varied from zero until 4 M, while the concentration of zinc chloride is fixed at 2 M. The aim is to produce a porous zinc coating with an enhanced and intimate interfacial area per unit volume. These characteristics shall contribute towards reduced ohmic losses, improved active material utilization, and subsequently producing high rate capacity electrochemical cell. Nitrogen physisorption at 77 K is used to measure the BET surface area and pore volume density of the zinc electrodeposits. The electrodeposited zinc electrodes are then fabricated into alkaline zinc-air microbattery measuring 1 cm2 area x ca. 305 µm thick. The use of inorganic MCM-41 membrane separator enables the fabrication of a compact cell design. The quality of the electrodeposited zinc electrodes is gauged directly from the electrochemical performance of zinc-air cell. Zinc electrodeposits prepared from electrolytic bath of 2 M NH4Cl produces the highest discharge capacity.ABSTRAK: Elektrod zink dengan kadar discas tinggi telah dihasilkan dengan proses saduran elektrokimia. Takungan elektrolit terdiri daripada zink klorida sebagai sumber logam dan ammonium klorida sebagai elektrolit sokongan. Kepekatan elektrolit sokongan diubah daripada sifar hingga 4 M, sementara kepekatan zink klorida ditetapkan pada 2 M. Ini bertujuan untuk mendapatkan saduran zink yang poros dengan luas permukaan per unit isipadu dan sentuhan antaramuka yang dipertingkatkan. Ciri-ciri ini akan menyumbang terhadap pengurangan kehilangan disebabkan kerintangan, pertambahan dalam gunapakai bahan aktif dan akhirnya menghasilkan sel elektrokimia berprestasi tinggi. Physisorpsi nitrogen pada 77 K telah digunakan untuk mengukur luas permukaan BET dan isipadu liang

  15. Roadside soils show low plant available zinc and copper concentrations

    International Nuclear Information System (INIS)

    Morse, Natalie; Walter, M. Todd; Osmond, Deanna; Hunt, William

    2016-01-01

    Vehicle combustion and component wear are a major source of metal contamination in the environment, which could be especially concerning where road ditches are actively farmed. The objective of this study was to assess how site variables, namely age, traffic (vehicles day"−"1), and percent carbon (%C) affect metal accumulation in roadside soils. A soil chronosequence was established with sites ranging from 3 to 37 years old and bioavailable, or mobile, concentrations of Zinc (Zn) and Copper (Cu) were measured along major highways in North Carolina using a Mehlich III extraction. Mobile Zn and Cu concentrations were low overall, and when results were scaled via literature values to “total metal”, the results were still generally lower than previous roadside studies. This could indicate farming on lands near roads would pose a low plant toxicity risk. Zinc and Cu were not correlated with annual average traffic count, but were positively correlated with lifetime traffic load (the product of site age and traffic count). This study shows an often overlooked variable, site age, should be included when considering roadside pollution accumulation. Zinc and Cu were more strongly associated with %C, than traffic load. Because vehicle combustion is also a carbon source, it is not obvious whether the metals and carbon are simply co-accumulating or whether the soil carbon in roadside soils may facilitate previously overlooked roles in sequestering metals on-site. - Highlights: • Low plant available zinc and copper concentrations in roadside soils of the southeast U.S. • Metals from vehicular traffic may not be adversely affecting plants in roadside environment. • Traffic volume and site age better predictor of metal pollution than traffic volume alone. - Mobile concentrations of Zn and Cu in roadside soils were below toxic levels. Zn and Cu concentrations were better correlated with lifetime vehicle load, as opposed to traffic volume.

  16. Significado de la calidad de vida del adulto mayor para sí mismo y para su familia

    Directory of Open Access Journals (Sweden)

    Martha Vera

    2007-09-01

    Full Text Available Objetivo: Comprender el significado que la expresión lingüística ‘calidad de vida del adulto mayor’ tiene para el adulto mayor y para su familia. Diseño: Estudio cualitativo, descriptivo, interpretativo - comprensivo, fundamentado en la Teoría de las Representaciones Sociales. Lugar: Asentamiento Humano Laura Caller, en Los Olivos. Participantes: Adultos mayores y sus respectivos grupos familiares. Métodos: Las técnicas e instrumentos utilizados fueron la observación, entrevista a profundidad y grupos focales; guía de observación y dos cuestionarios con ocho preguntas norteadoras, previamente validados. Principales medidas de resultados: Significado de calidad de vida para el adulto mayor y para la familia. Resultados: Participaron dieciséis adultos mayores con sus respectivos grupos familiares, entre 2004 y 2006. Los discursos a través de la ‘objetivación’ y el ‘anclaje’ y los análisis general, ideográfico-axial y nomotético-selectivo permitieron la emergencia de cuatro representaciones sociales: a conocimiento sobre la vejez y ser un adulto mayor; b elementos principales y secundarios del significado de calidad de vida del adulto mayor; c valores y actitudes del adulto mayor y familia sobre la calidad de vida; y, d necesidades del adulto mayor como ser social y la calidad de vida. Conclusiones: Para el adulto mayor, calidad de vida significa tener paz y tranquilidad, ser cuidado y protegido por la familia con dignidad, amor y respeto, y tener satisfechas como ser social sus necesidades de libre expresión, decisión, comunicación e información. Para la familia, que el adulto mayor satisfaga sus necesidades de alimentación, vestido, higiene y vivienda.

  17. Gambaran Status Gizi Anak Talasemia β Mayor di RSUP Dr. M. Djamil Padang

    Directory of Open Access Journals (Sweden)

    Dona Mirsa Putri

    2015-09-01

    Full Text Available Abstrak  Talasemia merupakan penyakit kronik yang membutuhkan transfusi setiap bulan, karena eritrosit lebih cepat lisis dibandingkan eritrosit normal. Komplikasi dan efek penyakit ini banyak, antara lain pertumbuhan, perkembangan, dan status gizinya. Penelitian ini bertujuan  mengetahui gambaran  status gizi anak talasemia β mayor Penelitian iniadalah penelitian deskriptif yang  dilakukan pada bulan Februari 2012 - Maret 2013 di RSUP Dr. M. Djamil Padang dengan sampel anak talasemia β mayor. Pemeriksaan yang dilakukan adalah mengukur tinggi badan, berat badan, dan lingkar lengan. Hasil pemeriksaan dimasukkan dalam tabel persentil NCHS dan penilaian status gizi berdasarkanDepartemen Kesehatan Repubik Indonesia.Hasil penelitian ini terdapat 15 anak talasemia β mayor, dengan rata-rata umur kelompok 5-10 tahun. Frekuensi terbanyak indeks tinggi badan per umur yaitu 70%-90% (60%.. Frekuensi terbanyak indeks berat badan per umur adalah 60%-80% (66.7%. Frekuensi terbanyak indeks lingkar lengang atas per umur adalah 70%-85% (80%. Simpulan dari hasil penelitian status gizi anak talasemia β mayor adalah gizi kurang.Kata kunci: Status gizi, talasemia β mayorAbstract Thalassemia is a chronic disease who needs blood tranfusion every month because the abnormal erythrocyte has short life time compared with the normal erythrocyte. There are so many complications and effects of this disease, such as growth and nutritional status. The aim of this research is to describe chlidren's nutritional status with thalassemia beta major. This research is a descriptive research. It has been done since February 2012 - March 2013 at RSUP Dr.  M. Djamil Padang. The sampling is children with thalassemia beta major. The examination are stature, weight, and upper arm circumference and the result is entered into NHCS percentil and assessment of Nutritional based on health department of Indonesia. From this research, there are 15 children who are suffering thalassemia

  18. Eficacia de la coronariografía en el adulto mayor

    Directory of Open Access Journals (Sweden)

    Luis Enrique Arozarena Díaz

    2015-06-01

    Full Text Available Introducción: se considera adulto mayor a toda persona cuya edad supere los 60 años, aunque se admite que este criterio no toma en cuenta: los procesos degenerativos, las alteraciones clínicas crónicas, la incapacidad y la dependencia. Objetivo: determinar la eficacia y seguridad de la coronariografía y el intervencionismo coronario percutáneo en el adulto mayor. Material y método: se realizó un estudio retrospectivo y descriptivo con los 5715 pacientes. A estos se les realizó una coronariografía en el laboratorio de hemodinámica del Cardiocentro procedente de Pinar del Río, entre 2010 y 2013. La muestra quedó formada por los 1933 mayores de 60 años. La información se obtuvo de la base de datos ANGYCOR, considerando las características clínico-angiográficas. Resultados: el diagnóstico más frecuente resultó la angina estable (43,5%. La edad promedio de 60 a 70 años, predominando el grupo de 60 a 69 años; la masculinidad (77,2% y la hipertensión arterial (64,9%. El 7,8% de los enfermos tenían una revascularización anterior. En el 98,0% el proceder resultó exitoso. Se concluyó que el índice de complicaciones y la mortalidad en coronariografía del adulto mayor es bajo, con elevado porcentaje de éxito, por lo que parece proceder eficaz y seguro. Conclusiones: el índice de realización de coronariografía a pacientes mayores de 60 años es bajo. La indicación del estudio, la presencia de enfermedad multivasos y del tronco de coronaria izquierda disminuyen a medida que aumenta la edad. La frecuencia de complicaciones, la mortalidad es nula con elevado índice de éxito.

  19. Mayores Universitarios en la Red University Senior Students on the Web

    Directory of Open Access Journals (Sweden)

    Felicidad Loscertales Abril

    2011-10-01

    Full Text Available Hoy día la relevancia de Internet es cada vez mayor en todos los ámbitos. Participar en la misma es fundamental para estar integrados socialmente. El aumento de la esperanza y la calidad de vida conllevan que los mayores activos supongan un volumen significativo de la población. En este trabajo se analiza el uso que personas mayores activas realizan de Internet, así como los principales beneficios o motivaciones de su utilización, y las barreras que encuentran aquéllos que no la utilizan. Se administró un cuestionario a personas inscritas en programas universitarios de mayores. Los resultados muestran que estos mayores universitarios se conectan a Internet frecuentemente, a diario o entre dos o tres veces por semana. Se destaca la relevancia de Internet para estar actualizados, contactar con la familia y los amigos, el uso académico, y consultar la prensa. La consideran fácil de utilizar aunque afirman que podrían vivir sin ella. Por otro lado, para los que no acceden a Internet no saber utilizarla es una de las principales barreras, si bien las personas que no la utilizan consideran que serían capaces de aprender. En su conjunto los datos animan a romper estereotipos negativos sobre los mayores y a no considerar a los mayores activos como personas incapaces o desconectadas de la Red sino a valorar positivamente los avances que realizan y la motivación por aprender.The Internet is increasingly prominent in all walks of life, and Web connection is a key factor in social integration. The rise in life expectancy and quality of life mean that our active seniors now represent a growing sector in society. This study analyses what senior citizens use the Internet for and why, as well as the main benefits of its usage and the perceived obstacles of those who are non-users. The results derive from a questionnaire completed by senior citizens enrolled on university courses for older people, and they show that university seniors frequently

  20. Comparative effects of zinc oxide nanoparticles and dissolved zinc on zebrafish embryos and eleuthero-embryos: Importance of zinc ions

    NARCIS (Netherlands)

    Brun, N.R.; Lenz, M.; Wehrli, B.; Fent, K.

    2014-01-01

    The increasing use of zinc oxide nanoparticles (nZnO) and their associated environmental occurrence make it necessary to assess their potential effects on aquatic organisms. Upon water contact, nZnO dissolve partially to zinc (Zn(II)). To date it is not yet completely understood, whether effects of

  1. Effect of Consuming Zinc-fortified Bread on Serum Zinc and Iron Status of Zinc-deficient Women: A Double Blind, Randomized Clinical Trial.

    Science.gov (United States)

    Badii, Akbar; Nekouei, Niloufar; Fazilati, Mohammad; Shahedi, Mohammad; Badiei, Sajad

    2012-03-01

    After iron deficiency, zinc deficiency is the major micronutrient deficiency in developing countries, and staple food fortification is an effective strategy to prevent and improve it among at-risk-populations. No action has been taken to reduce zinc deficiency via flour fortification so far in Iran, and little is known about the influence of zinc fortification of flour on serum zinc and the iron status, and also about the optimum and effective amount of zinc compound that is used in food fortification. The objective of this study is to evaluate the influence of consuming zinc-fortified breads on the zinc and iron status in the blood serum. In this study, three types of bread were prepared from non-fortified and fortified flours, with 50 and 100 ppm elemental zinc in the form of sulfate. Eighty zinc-deficient women aged 19 to 49 years were randomly assigned to three groups; The volunteers received, daily, (1) a non-fortified bread, (2) a high-zinc bread, and (3) a low-zinc bread for one month. Serum zinc and iron were measured by Atomic Absorption before and after the study. Results showed a significant increase in serum zinc and iron levels in all groups (p 0.05). Absorption of zinc and iron in the group that consumed high-zinc bread was significantly greater than that in the group that received low-zinc bread (p bread improved iron absorption.

  2. 40 CFR 440.104 - New source performance standards (NSPS).

    Science.gov (United States)

    2010-07-01

    ... GUIDELINES AND STANDARDS ORE MINING AND DRESSING POINT SOURCE CATEGORY Copper, Lead, Zinc, Gold, Silver, and... copper, lead, zinc, gold, silver, or molybdenum bearing ores or any combination of these ores from open... discharge of process wastewater to navigable waters from mills that use the froth-flotation process alone...

  3. Biological and Physiochemical Techniques for the Removal of Zinc from Drinking Water: A Review

    Directory of Open Access Journals (Sweden)

    Naseem Zahra

    2015-12-01

    Full Text Available Presence of Zinc (II in drinking water beyond permissible limits is considered unsafe for human health. Many different anthropogenic activities including mining, burning of petroleum, industrialization, and urbanization cause a release of considerably higher amounts of zinc into the waterbodies. A permissible limit of 5 mg/L is set by various environmental and pollution control authorities beyond which water may cause respiratory, liver, gonads, and brain disorders. Due to these health hazards, it is important to remove exceeding amounts of zinc from drinking water. Zinc enters drinking water from various sources such as corrosive pipelines, release of industrial effluents, and metal leaching. Different biological and physiochemical techniques are used to remove zinc involving chemical precipitation, ion exchange, adsorption, biosorbents, distillation, ozonation, and membrane filtration technology. Among these technologies, physical process of adsorption using low cost adsorbents is not only economical but abundant, efficient, and easily available. In present review different physiochemical and biological techniques are discussed for the removal of Zinc from drinking water.

  4. ESTUDIOS BIOARQUEOLÓGICOS DEL SITIO PASO MAYOR, SUDOESTE DE LA PROVINCIA DE BUENOS AIRES / Bioarchaeological studies of Paso Mayor site, southwest Buenos Aires province

    Directory of Open Access Journals (Sweden)

    Clara Scabuzzo

    2013-07-01

    Full Text Available En este trabajo se resumen los estudios bioarqueológicos realizados en la colección osteológica del sitio Paso Mayor Y1S2 (partido de Coronel Pringles, Buenos Aires. Los análisis efectuados comprendieron diferentes etapas. En primer lugar se hizo un inventario de la colección y se relevaron algunas variables tafonómicas para conocer el estado general de conservación de los restos. Una segunda etapa estuvo orientada a determinar la estructura sexo-etaria de la muestra. Finalmente se efectuaron estudios de marcadores de estrés ocupacional y el relevamiento de algunas patologías de carácter infeccioso y traumático. En conjunto estos análisis muestran que en el sitio se inhumaron individuos subadultos y adultos de ambos sexos, los restos fueron enterrados de manera primaria y secundaria. La colección muestra un buen estado de conservación por lo que fue posible determinar la mayoría de los elementos óseos analizados. En cuanto a los estudios de marcadores de actividad física, estos indican la importancia de la actividad deambulatoria y el posible uso de sistemas de armas como el arco y flecha. Se registró una reacción perióstica en los miembros inferiores y un traumatismo en el esqueleto craneal. Finalmente se discute la información bioarqueológica del sitio con la publicada para otros sitios del área. Abstract This paper summarizes the bioarchaeological studies of the osteological collection recovered in Paso Mayor Y1S2 site (Coronel Pringles, Buenos Aires. Analyses were carried out in different stages. First, a detailed inventory of the collection was made and some taphonomic variables were considered in order to evaluate the general condition of the bone remains. A second phase was oriented to the determination of the age-sex structure of the sample. Finally, occupational stress markers studies were undertaken along with the observation of certain infectious and traumatic pathologies. As a whole, these analyses show the

  5. Bioavailability of zinc from defatted soy flour, soy hulls and whole eggs as determined by intrinsic and extrinsic labeling techniques.

    Science.gov (United States)

    Meyer, N R; Stuart, M A; Weaver, C M

    1983-06-01

    Bioavailability of zinc from diets prepared from intrinsically and extrinsically labeled autoclaved, defatted soy flour and scrambled, freeze-dried egg was investigated in male rats marginally depleted in zinc. In one study, retention of zinc from intrinsically labeled soybean flour (73%) was significantly less than from 65ZnCl2 extrinsically added to a soy flour-based diet (80%). Zinc from intrinsically labeled soybean hulls and from soy flour diets containing 10% soybean hulls extrinsically labeled with 65ZnCl2 was as available as the zinc from the extrinsically labeled soy flour diet. In a second study, extrinsic and intrinsic labeling techniques gave a similar assessment of bioavailability of zinc from egg- and soy flour-based diets when extrinsic labeling was accomplished by thoroughly mixing 65ZnCl2 with the protein source prior to incorporation into the diet. Absorption of 65Zn was greater from egg diets than from soy flour diets and of intermediate value from mixed soy flour and egg (50:50, wt/wt) diets regardless of which protein source was labeled, indicating that the zinc entered a common pool.

  6. The Potential for Zinc Stable Isotope Techniques and Modelling to Determine Optimal Zinc Supplementation

    Directory of Open Access Journals (Sweden)

    Cuong D. Tran

    2015-05-01

    Full Text Available It is well recognised that zinc deficiency is a major global public health issue, particularly in young children in low-income countries with diarrhoea and environmental enteropathy. Zinc supplementation is regarded as a powerful tool to correct zinc deficiency as well as to treat a variety of physiologic and pathologic conditions. However, the dose and frequency of its use as well as the choice of zinc salt are not clearly defined regardless of whether it is used to treat a disease or correct a nutritional deficiency. We discuss the application of zinc stable isotope tracer techniques to assess zinc physiology, metabolism and homeostasis and how these can address knowledge gaps in zinc supplementation pharmacokinetics. This may help to resolve optimal dose, frequency, length of administration, timing of delivery to food intake and choice of zinc compound. It appears that long-term preventive supplementation can be administered much less frequently than daily but more research needs to be undertaken to better understand how best to intervene with zinc in children at risk of zinc deficiency. Stable isotope techniques, linked with saturation response and compartmental modelling, also have the potential to assist in the continued search for simple markers of zinc status in health, malnutrition and disease.

  7. Influence of soil zinc concentrations on zinc sensitivity and functional diversity of microbial communities

    International Nuclear Information System (INIS)

    Lock, K.; Janssen, C.R.

    2005-01-01

    Pollution induced community tolerance (PICT) is based on the phenomenon that toxic effects reduce survival of the most sensitive organisms, thus increasing community tolerance. Community tolerance for a contaminant is thus a strong indicator for the presence of that contaminant at the level of adverse concentrations. Here we assessed PICT in 11 soils contaminated with zinc runoff from galvanised electricity pylons and 11 reference soils sampled at 10 m distance from these pylons. Using PICT, the influence of background concentration and bioavailability of zinc on zinc sensitivity and functional diversity of microbial communities was assessed. Zinc sensitivity of microbial communities decreased significantly with increasing zinc concentrations in pore water and calcium chloride extracted fraction while no significant relationship was found with total zinc concentration in the soil. It was also found that functional diversity of microbial communities decreased with increasing zinc concentrations, indicating that increased tolerance is indeed an undesirable phenomenon when environmental quality is considered. The hypothesis that zinc sensitivity of microbial communities is related to background zinc concentration in pore water could not be confirmed. - Zinc sensitivity of microbial communities and functional diversity decrease with increasing zinc concentration in the pore water

  8. The Potential for Zinc Stable Isotope Techniques and Modelling to Determine Optimal Zinc Supplementation

    Science.gov (United States)

    Tran, Cuong D.; Gopalsamy, Geetha L.; Mortimer, Elissa K.; Young, Graeme P.

    2015-01-01

    It is well recognised that zinc deficiency is a major global public health issue, particularly in young children in low-income countries with diarrhoea and environmental enteropathy. Zinc supplementation is regarded as a powerful tool to correct zinc deficiency as well as to treat a variety of physiologic and pathologic conditions. However, the dose and frequency of its use as well as the choice of zinc salt are not clearly defined regardless of whether it is used to treat a disease or correct a nutritional deficiency. We discuss the application of zinc stable isotope tracer techniques to assess zinc physiology, metabolism and homeostasis and how these can address knowledge gaps in zinc supplementation pharmacokinetics. This may help to resolve optimal dose, frequency, length of administration, timing of delivery to food intake and choice of zinc compound. It appears that long-term preventive supplementation can be administered much less frequently than daily but more research needs to be undertaken to better understand how best to intervene with zinc in children at risk of zinc deficiency. Stable isotope techniques, linked with saturation response and compartmental modelling, also have the potential to assist in the continued search for simple markers of zinc status in health, malnutrition and disease. PMID:26035248

  9. Regulation of Nitrogen Metabolism by GATA Zinc Finger Transcription Factors in Yarrowia lipolytica

    OpenAIRE

    Pomraning, Kyle R.; Bredeweg, Erin L.; Baker, Scott E.

    2017-01-01

    ABSTRACT Fungi accumulate lipids in a manner dependent on the quantity and quality of the nitrogen source on which they are growing. In the oleaginous yeast Yarrowia lipolytica, growth on a complex source of nitrogen enables rapid growth and limited accumulation of neutral lipids, while growth on a simple nitrogen source promotes lipid accumulation in large lipid droplets. Here we examined the roles of nitrogen catabolite repression and its regulation by GATA zinc finger transcription factors...

  10. Impact of anode substrates on electrodeposited zinc over cycling in zinc-anode rechargeable alkaline batteries

    International Nuclear Information System (INIS)

    Wei, Xia; Desai, Divyaraj; Yadav, Gautam G.; Turney, Damon E.; Couzis, Alexander; Banerjee, Sanjoy

    2016-01-01

    Electrochemical behavior of Ag, Bi, Cu, Fe, Ni and Sn substrates on zinc deposition was evaluated over battery cycling by cyclic voltammetry and electrochemical impedance spectroscopy. The effect of Bi, Cu, Ni, and Sn substrates on zinc electrodeposition during battery cycling was investigated using scanning electron microscopy and X-ray diffraction. The corrosion behavior of each metal in 9 M KOH and the corrosion rates of zinc plated on each substrate were analyzed by Tafel extrapolation method from the potentiodynamic polarization curves and electrochemical impedance spectroscopy. Although the charge-transfer resistance (R_c_t) of zinc electrodeposition is lowest on Sn, Sn eventually corrodes on cycling in alkaline media. Use of Ni as a substrate causes zinc to deteriorate on account of rapid hydrogen evolution. Bi and Cu substrates are more suitable for use as current collectors in zinc-anode alkaline rechargeable batteries because of their low corrosion rate and compact zinc deposition over battery cycling.

  11. Serum zinc status of neonates with seizure

    Directory of Open Access Journals (Sweden)

    Olia Sharmeen

    2016-08-01

    Full Text Available Background: Seizure is a common neurological disorder in neonatal age group!. Primary metabolic derangement is one of the important reason behind this convulsion during this period. Among primary metabolic derangement hypoglycemia, is most common followed by bypocalcaemia, hypomagnesaemia, low zinc status etc. As causes of many cases of convul­sion remain unknown in neonate. Objectives: To see the zinc status in the sera of neonate with convulsion. So that if needed early intervention can be taken up and thereby prevent complications. Method: A total of 50 neonates (1-28 days who had convulsion with no apparent reasons of convulsion were enrolled as cases and 50 healthy age and sex matched neonates were enrolled as controls. After a quick clinical evaluation serum zinc status was estimated from venous blood by atomic absorption method in Chemistry Division, Atomic Energy Centre. Low zinc was considered if serum value was <0.7mg/L. Results: Among a total of 50 cases 6% had low zinc value & 2% of controls also had low zinc level. The mean serwu zinc level of cases and controls were 1.57±0.95 and 2.37±1.06 mmol/1 respectively (p<0.01. Conclusion: From the study it is seen that low zinc value is an important cause of neonatal seizure due to primary metabolic abnormalities. So early recognition and treatment could save these babies from long term neurological sequelies.

  12. Bioavailability of zinc to aerobic rice

    NARCIS (Netherlands)

    Gao, X.

    2007-01-01

    Keywords:Arbuscular mycorrhiza, Exudation, Oryza sativa , Rhizosphere, Rice, Soil, ZincZinc deficiency is a wide-spread constraint for crop production and human health. This thesis should contribute to alleviation of Zn deficiency problems and aimed at identifying soil

  13. 21 CFR 582.5994 - Zinc stearate.

    Science.gov (United States)

    2010-04-01

    ..., FEEDS, AND RELATED PRODUCTS SUBSTANCES GENERALLY RECOGNIZED AS SAFE Nutrients and/or Dietary Supplements 1 § 582.5994 Zinc stearate. (a) Product. Zinc stearate prepared from stearic acid free from chick-edema factor. (b) Conditions of use. This substance is generally recognized as safe when used in...

  14. Zinc dosing and glucose tolerance in humans

    International Nuclear Information System (INIS)

    Greenley, S.; Taylor, M.

    1986-01-01

    Animal data suggest the existence of a physiologic relationship between glucoregulatory hormones and zinc metabolism. In order to investigate this proposed relationship in humans, they examined the effect of moderately elevated plasma zinc levels on blood glucose clearance. Eight women (24-37 yrs) served as subjects for the study. Fasted volunteers were tested under two experimental conditions (a) ingestion of 50 g D-glucose (b) ingestion of 25 mg zinc followed 60 min later by ingestion of 50 g D-glucose. Five ml venous blood was drawn into trace-metal-free, fluoride-containing vacutainer tubes prior to and 15, 30, 45, 60, 90, and 120 min after glucose ingestion. Plasma was analyzed for glucose and zinc; glycemic responses were quantified by computing areas under the curves and times to peak concentration. Their human data indicate varied glycemic responses to the acute elevation of plasma zinc: 4 subjects showed little apparent effect; 3 subjects marginally increased either the area under the curve or time to peak and 1 subject (classified as suspect diabetic in the non-zinc condition) showed marked improvement in glycemic response following zinc ingestion. Their preliminary results suggest that blood glucose clearance may be affected in some individuals by the acute elevation of plasma zinc

  15. Studies of adsorption and desorption of zinc ions on zeolites by means of 65Zn

    International Nuclear Information System (INIS)

    Foeldesova, M.; Dillinger, P.; Lukac, P.

    2001-01-01

    The uptake of different metals by natural and chemically modified ion-exchangers, including zeolites, were studied in order to minimize the contamination of environment with metals in ionic form. In recent years considerable attention has been devoted to the studies of chemically modified zeolites their properties and applications. The used zeolite originated from the deposit Nizny Hrabovec, eastern Slovakia (NH) and from deposit of Ukraine (U). The zeolite from Slovakia is a clinoptilolite /40 -70%/ type, the zeolite from Ukraine is a mixed mordenite /75%/ and clinoptilolite /25%/ type. A fraction of 1.5 -2.5 mm was separated from the grained zeolite by sieving. The sedimentary zeolites, being the siliceous zeolites, should exhibit substantial non-selectivity for the divalent cations having a high hydration enthalpy , including zinc ( -2026 kJ/g). Zinc is an essential trace element in all-living systems from bacteria to humans. The toxicity of zinc and most of zinc compounds is generally low, however, sometimes industrial and household wastes contain zinc in concentrations, which can be harmful to the environment. The zinc-accompanying impurities, such as cadmium and lead, are of much greater danger .The main source of zinc are waste waters and continuous emission from the production and processing of zinc, other nonferrous smelters, from coal power plants and fossil combustion. The static radio-exchange method using model radioactive solutions was utilized for the determination of the sorption of Zn by the mentioned above zeolitic materials. For this purpose the aqueous solution of 5 · 10 -2 mol dm -3 ZnCl 2 labelled with 65 Zn was used. The areas of application of natural zeolites have been well defined. However, their use can become more efficient after chemical modification. The zeolites acquire new valuable properties, while retaining their original ones. The obtained results make these materials excellent candidates for their potential use for waste water

  16. Effect of consuming zinc-fortified bread on serum zinc and iron status of zinc-deficient women: A double blind, randomized clinical trial

    Directory of Open Access Journals (Sweden)

    Akbar Badii

    2012-01-01

    Full Text Available After iron deficiency, zinc deficiency is the major micronutrient deficiency in developing countries, and staple food fortification is an effective strategy to prevent and improve it among at-risk-populations. No action has been taken to reduce zinc deficiency via flour fortification so far in Iran, and little is known about the influence of zinc fortification of flour on serum zinc and the iron status, and also about the optimum and effective amount of zinc compound that is used in food fortification. The objective of this study is to evaluate the influence of consuming zinc-fortified breads on the zinc and iron status in the blood serum. In this study, three types of bread were prepared from non-fortified and fortified flours, with 50 and 100 ppm elemental zinc in the form of sulfate. Eighty zinc-deficient women aged 19 to 49 years were randomly assigned to three groups; The volunteers received, daily, (1 a non-fortified bread, (2 a high-zinc bread, and (3 a low-zinc bread for one month. Serum zinc and iron were measured by Atomic Absorption before and after the study. Results showed a significant increase in serum zinc and iron levels in all groups (p 0.05. Absorption of zinc and iron in the group that consumed high-zinc bread was significantly greater than that in the group that received low-zinc bread (p < 0.01. It was concluded that fortification of flour with 50-100 ppm zinc was an effective way to achieve adequate zinc intake and absorption in zinc-deficient people. It also appeared that consuming zinc-fortified bread improved iron absorption.

  17. Tracing of Zinc Nanocrystals in the Anterior Pituitary of Zinc-Deficient Wistar Rats.

    Science.gov (United States)

    Kuldeep, Anjana; Nair, Neena; Bedwal, Ranveer Singh

    2017-06-01

    The aim of this study was to trace zinc nanocrystals in the anterior pituitary of zinc-deficient Wistar rats by using autometallographic technique. Male Wistar rats (30-40 days of age, pre-pubertal period) of 40-50 g body weight were divided into the following: the ZC (zinc control) group-fed with 100 ppm zinc in diet, the ZD (zinc-deficient) group-fed with zinc-deficient (1.00 ppm) diet and the PF (pair-fed) group-received 100 ppm zinc in diet. The experiments were set for 2 and 4 weeks. Pituitary was removed and processed for the autometallographic technique. The control and pair-fed groups retained their normal morphological features. However, male Wistar rats fed on zinc-deficient diet for 2 and 4 weeks displayed a wide range of symptoms such as significant (P zinc nanocrystals in the nuclei. The present findings suggest that the dietary zinc deficiency causes decreased intensity of zinc nanocrystals localization and their distribution in the pituitary thereby contributing to the dysfunction of the pituitary of the male Wistar rats. The severity of zinc deficiency symptoms progressed after the second week of the experiment. Decreased intensity of zinc nanocrystals attenuates the pituitary function which would exert its affect on other endocrine organs impairing their functions indicating that the metabolic regulation of pituitary is mediated to a certain extent by zinc and/or hypothalamus-hypophysial system which also reflects its essentiality during the period of growth.

  18. Iron and zinc concentrations and 59Fe retention in developing fetuses of zinc-deficient rats

    International Nuclear Information System (INIS)

    Rogers, J.M.; Loennerdal, B.H.; Hurley, L.S.; Keen, C.L.

    1987-01-01

    Because disturbances in iron metabolism might contribute to the teratogenicity of zinc deficiency, we examined the effect of zinc deficiency on fetal iron accumulation and maternal and fetal retention of 59 Fe. Pregnant rats were fed from mating a purified diet containing 0.5, 4.5 or 100 micrograms Zn/g. Laparotomies were performed on d 12, 16, 19 and 21 of gestation. Maternal blood and concepti were analyzed for zinc and iron. Additional groups of dams fed 0.5 or 100 micrograms Zn/g diet were gavaged on d 19 with a diet containing 59 Fe. Six hours later maternal blood and tissues, fetuses and placentas were counted for 59 Fe. Maternal plasma zinc, but not iron, concentration was affected by zinc deficiency on d 12. Embryo zinc concentration on d 12 increased with increasing maternal dietary zinc, whereas iron concentration was not different among groups. On d 16-21 plasma iron was higher in dams fed 0.5 micrograms Zn/g diet than in those fed 4.5 or 100 micrograms/g, whereas plasma zinc was lower in dams fed 0.5 or 4.5 micrograms Zn/g than in those fed 100 micrograms Zn/g diet. On d 19 zinc concentration in fetuses from dams fed 0.5 micrograms/g zinc was not different from that of those fed 4.5 micrograms/g zinc, and iron concentration was higher in the 0.5 microgram Zn/g diet group. The increase in iron concentration in zinc-deficient fetuses thus occurs too late to be involved in major structural teratogenesis. Although whole blood concentration of 59 Fe was not different in zinc-deficient and control dams, zinc-deficient dams had more 59 Fe in the plasma fraction

  19. Properties of zinc oxide at low and moderate temperatures

    International Nuclear Information System (INIS)

    Lashkarev, G.V.; Karpina, V.A.; Lazorenko, V.I.; Evtushenko, A.I.; Shteplyuk, I.I.; Khranovskij, V.D.

    2011-01-01

    The properties of zinc oxide as an analogue of gallium nitride are considered in a wide temperature range and the field of its potential applications. The economic and ecologic benefits as well as radiation resistivity of ZnO in comparison with Group III nitrides are indicated. Methods of growth of films and nanostructures of high crystal perfection are proposed. In particular, a magnetron method for layer growth of films is implemented which permits to realize their high structural perfection and considerable thickness inappropriate to some other methods. It is shown that monochromatic UV light may be obtained on excitation of films by short-wave radiation and electrons. This makes it possible to use them in the sources of short-wave radiation. The effectiveness of field emission for ZnO nanostructures and films is demonstrated which opens the prospect for their use in vacuum microelectronics devices. In particular, a phototransistor based on ZnO films doped with nitrogen was fabricated the photosensitivity of which was two orders of magnitude higher than that of conventional detectors. The physical basis of creating blue, green LEDs based on zinc oxide film and its solid solutions with CdO are outlined. The importance of active research in physics, and production procedures of zinc oxide-based devices is underlined.

  20. Peso corporal y depresión en adultos mayores de comunidad urbano marginal en México - Tamaulipas.

    OpenAIRE

    Duran-Badillo, Tirso; Martínez Aguilar, Ma. de la Luz; Gutiérrez Sánchez, Gustavo; Rosa Ma., Rosa Ma.; Guevara-Valtie, Milton Carlos

    2016-01-01

    El peso corporal inadecuado y la depresión son factores que alteran la calidad de vida del adulto mayor. Objetivos: identificar asociación existente entre peso corporal y depresión en el adulto mayor. Material y Metodos: estudio descriptivo y correlacional, se realizó en una población urbano-marginal de Tamaulipas, México. Participaron 252 adultos mayores de 60 años y que tuvieran la capacidad física para mantenerse de pié al momento de medir el peso corporal y talla. El muestreo fue no proba...

  1. Maltrato intrafamiliar hacia el adulto mayor en el del Policlínico Reynold García de Versalles

    OpenAIRE

    García Rosique, Regla Mercedes; Guisado Zamora, Katia; Torres Triana, Adelaida

    2016-01-01

    Introducción: el maltrato al adulto mayor emerge como problema social, desde hace pocos años, y no porque antes no existiera, sino porque muchas veces existe en las familias y no sale a la luz pública. Objetivo: identificar maltrato intrafamiliar hacia los adultos mayores. Materiales y Métodos: se realizó un estudio descriptivo, de corte transversal en 60 adultos mayores de 60 años, pertenecientes al Consultorio Médico de Familia No. 87, del Policlínico Reynold García, área de Versalles de la...

  2. Los Centros y espacios de actividad física utilizados por las personas mayores en España

    OpenAIRE

    Jiménez-Beatty Navarro, Jose Emilio; Martínez del Castillo, Jesus; Hierro Pinés, David del; Martin Rodriguez, Maria; González Rivera, Maria Dolores

    2008-01-01

    El objeto de la comunicación ha consistido en abordar las instalaciones y espacios utilizados por las personas mayores que realizan actividad física semanalmente. El método ha consistido en la realización de una encuesta, en la que mediante entrevista personal se ha aplicado un cuestionario a una muestra aleatoria de la población de personas mayores en España. Los resultados muestran que la mayor parte de estas personas practican en espacios cubiertos y de instalaciones deportivas (sobre todo...

  3. Electrochemical Reduction of Zinc Phosphate

    International Nuclear Information System (INIS)

    Kim, Chang Hwan; Lee, Jung Hyun; Shin, Woon Sup

    2010-01-01

    We demonstrated first that the electrochemical reduction of zinc phosphate in neutral phosphate buffer is possible and potentially applicable to bio-compatible rechargeable battery. The actual redox component is Zn(s)/Zn phosphate(s) and the future research about the control of crystal formation for the better cyclability is required. In lead-acid battery, the electrochemical redox reaction of Pb (s) /PbSO 4(s) is used by reducing Pb(II) and oxidizing Pb(0) in sulfate rich solution. Since both reduced form and oxidized form are insoluble, they cannot diffuse to the opposite electrodes and react. It is a very common strategy to make a stable battery electrode that a metal element is reduced and oxidized in solution containing an abundance of anion readily precipitating with the metal ion. For the application of this strategy to construction of rechargeable battery using bio-compatible electrode materials and electrolytes, the use of phosphate ion can be considered as anion readily precipitating with metal ions. If phosphate buffer with neutral pH is used as electrolyte, the better bio-compatibility will be achieved than most of rechargeable battery using strong acid, strong base or organic solvent as electrolyte solution. There are many metal ions readily precipitating with phos-phate ion, and zinc is one of them

  4. Usos y gratificaciones de los ordenadores en personas mayores en Sudáfrica

    Directory of Open Access Journals (Sweden)

    Tanja Bosch

    2015-07-01

    Full Text Available A partir de entrevistas en profundidad, realizadas en un hogar de la tercera edad en Ciudad del Cabo (Sudáfrica, este estudio analiza los principales usos y gratificaciones que reciben las personas mayores en interacción con los ordenadores. En África, mientras el énfasis investigador se ha puesto en los últimos años en la salud de los mayores, especialmente en cuanto al SIDA, existe muy poca investigación sobre el uso de los mayores en cuanto a nuevas tecnologías, ya que la investigación en relación con las mismas se ha centrado principalmente en la juventud. En este estudio se halló que los participantes utilizan el correo electrónico y las redes sociales para mantener el contacto con familiares y amigos y a veces incluso con su vecindario. Además, mantener el contacto suponía no solo comunicación, sino también observación de actividades, como noticias, fotografías y conversaciones. En el contexto de los usos y gratificaciones, el trabajo ha evidenciado que los participantes se sentían conectados con la sociedad, tanto por su comunicación como por la observación de las personas, y por mantenerse informados de las noticias y los temas de interés actuales. Mediante el uso de Internet, las personas de edad avanzada se comunicaban mucho más de lo que antes se habían comunicado con otras personas. Algunos de los participantes se sentían menos aislados y solos, debido a su uso del ordenador. Sin embargo, se demostró también que el uso de los ordenadores no obstaculizó los contactos interpersonales tradicionales.

  5. Diferencias relacionadas con la salud de mujeres y hombres adultos mayores

    Directory of Open Access Journals (Sweden)

    Ileana E Castañeda Abascal

    Full Text Available Introducción: la humanidad se enfrenta a la elevación del número de ancianos(as. Cuba no es una excepción. La salud en ancianos(as es diferente, debido a los factores biológicos, psicológicos y culturales a que están expuestos a lo largo de la vida, de ahí la necesidad de su estudio. Objetivos: identificar las diferencias relacionadas con la salud de mujeres y hombres adultos mayores en el área de salud Cuatro Caminos, durante el año 2009. Métodos: se realizó una investigación descriptiva y transversal. El universo estuvo constituido por los 1 562 ancianos (761 mujeres y 801 hombres residentes en el área de salud Cuatro Caminos. La información se recolectó a través de los registros de adultos mayores, hojas de cargo de los consultorios médicos de la familia, y una entrevista semiestructurada aplicada a la totalidad del universo. Resultados: las edades más representadas para ambos sexos estuvieron entre 60 y 79 años. Tanto mujeres como hombres padecían enfermedades crónicas, destacándose la hipertensión arterial. Las féminas fueron más frecuentes en los ancianos frágiles y en estado de necesidad. Los ancianos solos fueron mayoritariamente hombres. Las mujeres se realizaron más los exámenes periódicos de salud y recibieron atención domiciliaria. Conclusiones: la salud, las actividades que realizan y la atención geriátrica son diferentes en mujeres y hombres adultos mayores.

  6. Calidad de vida en adultos mayores del hogar de ancianos del municipio Cruces

    Directory of Open Access Journals (Sweden)

    María del Carmen Corugedo Rodríguez

    Full Text Available Introducción: el proceso de envejecimiento es un hecho relevante para todos los sistemas de salud en el mundo debido a la transición demográfica. Cuba no está exenta de esta realidad, por lo que la calidad de vida del adulto mayor es un tema de gran importancia. Objetivo: caracterizar la calidad de vida percibida en los adultos mayores del Hogar de Ancianos del municipio Cruces. Métodos: se realizó un estudio observacional descriptivo de corte transversal durante el periodo de febrero de 2012 a febrero de 2013. El universo estuvo constituido por los 28 ancianos que viven en el hogar de ancianos del municipio Cruces. La información se obtuvo con la aplicación de la Escala M.G.H. Se aplicaron técnicas estadísticas. Resultados: de forma general los ancianos perciben baja calidad de vida, independientemente de las variables sociodemográficas (edad, sexo y nivel de escolaridad. La dimensión de resultados más bajos fue la satisfacción por la vida. El 82 % de los adultos mayores perciben una baja calidad de vida en relación con la misma, seguida por la dimensión socioeconómica. Conclusiones: casi todos los ancianos de la investigación perciben una baja calidad de vida, debido al predominio de estados de displacer y pobres vínculos o mala calidad en las relaciones con sus familiares.

  7. Índice de vulnerabilidad de adultos mayores en Medellín, Barranquilla y Pasto.

    Science.gov (United States)

    Cardona, Doris; Segura, Ángela; Segura, Alejandra; Muñoz, Diana; Jaramillo, Daniel; Lizcano, Douglas; Agudelo, Maite Catalina; Arango, Catalina; Morales, Santiago

    2018-05-01

    Introducción. La vulnerabilidad puede entenderse como la carencia de recursos materiales e inmateriales que impide el aprovechamiento de oportunidades en distintos aspectos de la vida. Estos recursos de bienestar evitan el deterioro de la calidad de vida.Objetivo. Construir un índice de vulnerabilidad con las características de los capitales físico, humano, social y funcional de los adultos mayores de tres ciudades de Colombia en el 2016, y determinar los factores asociados con esta condición.Materiales y métodos. Se hizo un estudio transversal con información primaria mediante 1.514 encuestas a personas de 60 años o más de Medellín, Barranquilla y Pasto. En la construcción del índice se usó el análisis factorial con los métodos de componentes principales y de rotación ortogonal varimax.Resultados. Las condiciones que generaban vulnerabilidad se relacionaron principalmente con el capital humano (calidad de vida, salud mental y hábitos); los demás capitales aportaron un solo componente, así: capital físico (ocupación), capital social (acompañamiento) y capital funcional (independencia funcional). La vulnerabilidad fue mayor en los residentes de Pasto. Los factores asociados con la vulnerabilidad fueron la ciudad de residencia, el sexo, el nivel educativo y el rol en el hogar.Conclusión. En el 58,55 % de las personas mayores, la vulnerabilidad se explicó por el uso del tiempo, la independencia funcional y el bienestar subjetivo. Estos hallazgos aportan elementos para el mejoramiento de la calidad de vida, principalmente en cuanto a la capacidad funcional para mantener la independencia, estar ocupados y fortalecer la salud mental.

  8. Efecto de dos protocolos de ejercicios en personas mayores de 65 años institucionalizadas

    Directory of Open Access Journals (Sweden)

    Yolanda Marcen Román

    2014-12-01

    Full Text Available Entre la población mayor, uno de los pilares centrales de la calidad de vida es la salud, adquiriendo especial importancia la condición física como capacidad para mantener la independencia funcional. El objetivo general es medir el efecto sobre el equilibrio estático y dinámico, la fuerza y la flexibilidad de ambas extremidades tras un periodo de 3 meses de intervención y posteriormente las consecuencias de otros tres meses sin ejercicios.Metodología: Estudio pre-post intervención en una muestra de 36 ancianos institucionalizados mayores de 65 años con deterioro cognitivo normal-leve, divididos en 3 grupos: ejercicios vestibulares, ejercicios de potenciación y grupo control sin intervención. Resultados: Mejoría significativa del equilibrio, la flexibilidad y la fuerza muscular de miembros inferiores en cada uno de los grupos de intervención con respecto al grupo control. Disminución de la capacidad funcional medida a través de una batería de test tras 3 meses sin intervención. Conclusiones: El equilibrio, la fuerza y la flexibilidad de extremidades inferiores y superiores en personas mayores de 65 años institucionalizadas del presente estudio mejoran con la realización de los protocolos de tratamiento diseñados a partir de ejercicios de potenciación de miembros inferiores y de ejercicios vestibulares, en relación al grupo control. La capacidad funcional va disminuyendo si no se realizan de forma continua ejercicios encaminados a fomentarla

  9. Envejecimiento satisfactorio e indicadores de fragilidad en los mayores de la comunidad. Estudio Octabaix

    OpenAIRE

    Ferrer, Assumpta; Formiga, Francesc; Sanz, Héctor; Monserrate, Elena; Verges, Dolors

    2014-01-01

    El envejecimiento satisfactorio como estado óptimo de un proceso de adaptación es poco conocido en las personas más mayores. Objetivo: Describir envejecimiento satisfactorio y analizar su asociación con indicadores de fragilidad en personas de 86 años. Diseño: Estudio descriptivo transversal al segundo año de seguimiento de un ensayo clínico (estudio Octabaix). Emplazamiento: Siete centros de atención primaria. Participantes: Personas nacidas en 1924, no institucionalizadas. Me...

  10. Perfil clínico del adulto mayor atendido ambulatoriamente en un hospital general.

    OpenAIRE

    Casas, Paola; Varela, Luis; Tello, Tania; Ortiz, Pedro; Chávez, Helver

    2012-01-01

    Objetivo: Describir el perfil clínico del adulto mayor atendido ambulatoriamente en un hospital general. Material y métodos: Estudio descriptivo, transversal, realizado a través de encuestas aplicadas a pacientes en la consulta ambulatoria de geriatría del Hospital Nacional Cayetano Heredia (HNCH), entre agosto de 2011 y enero 2012. Resultados: Se evaluaron 290 pacientes, el 69,3% fueron mujeres; el 65,5% tenía entre 60 y 79 años. La hipertensión arterial fue el diagnóstico más frecuente (55,...

  11. Valoración funcional del adulto mayor relacionado con el abandono familiar.

    OpenAIRE

    Jenny Fernanda Villarroel Vargas; Vicente Hernán Cárdenas Naranjo; Josefa Margarita Miranda Vázquez

    2017-01-01

    Introducción: Se estima que entre el 2000 al 2050 la población mundial envejecida ascenderá del 11% al 22 %, con ello el incremento de las diversas enfermedades o trastornos propios de la edad. Objetivo: Establecer la relación entre capacidad funcional del adulto mayor con el abandono familiar en el barrio La Calera Centro, Latacunga, 2015-2016. Métodos: Se realizó un estudio observacional descriptivo de corte trasversal, donde previo consentimiento informado participaron 70 adultos m...

  12. Niveles de bienestar espiritual y de fortaleza relacionados con la salud en adultos mayores

    OpenAIRE

    Martha V. Whetsell; Keville Frederickson; Paulina Aguilera; Juan Luis Maya

    2005-01-01

    Este estudio investigó la relación entre niveles de bienestar espiritual y fortaleza relacionada con la salud en una población mexicana de adultos mayores de 65 años. El proyecto se basó en el Modelo de Adaptación de Roy, el Modelo de Pollock (fortaleza relacionada con la salud) y el de Reed (bienestar espiritual). El diseño fue descriptivo correlacional, la muestra fue probabilística y se hizo al azar. La muestra (n=160) tuvo un nivel de significancia de 0,05 para una di...

  13. Revisión estructurada de las escalas de depresión en personas mayores

    OpenAIRE

    María José Cabañero-Martínez; Julio abrero-García; Miguel Richart-Martínez; Carmen Luz Muñoz-Mendoza; Abilio Reig-Ferrer

    2007-01-01

    El objetivo de este estudio teórico fue evaluar la adecuación conceptual, la aplicabilidad y las propiedades métricas de las medidas de depresión empleadas en la investigación con muestras de personas mayores españolas. Para ello se realizaron búsquedas electrónicas en las bases de datos nacionales IME e ISOC, y en las bases de datos internacionales MEDLINE, PsyInfo, CINAHL y Embase, así como búsquedas manuales en revistas reputadas del campo de la geriatría y la evaluación de ...

  14. Síndrome del cuidador de adultos mayores discapacitados y sus implicaciones psicosociales

    OpenAIRE

    Eliana Dueñas; María Anggeline Martínez; Benjamín Morales; Claudia Muñoz; Ana Sofía Viáfara; Julián A. Herrera

    2006-01-01

    Objetivo: Describir la prevalencia del síndrome del cuidador y las características psicosociales de los cuidadores de adultos mayores discapacitados. Materiales y métodos: Se realizó un estudio piloto de casos y controles en el Valle del Cauca durante el 2003-2004 para evaluar la funcionalidad familiar (APGAR familiar), la ansiedad y depresión (escala de Goldberg), la presencia de enfermedades (cuidadores y no cuidadores), y la prevalencia del síndrome del cuidador (escala de Zarit). Resul...

  15. Síndrome del cuidador de adultos mayores discapacitados y sus implicaciones psicosociales

    OpenAIRE

    Dueñas, Eliana; Martínez, María Anggeline; Morales, Benjamín; Muñoz, Claudia; Viáfara, Ana Sofía; Herrera, Julián A

    2006-01-01

    Objetivo: Describir la prevalencia del síndrome del cuidador y las características psicosociales de los cuidadores de adultos mayores discapacitados. Materiales y métodos: Se realizó un estudio piloto de casos y controles en el Valle del Cauca durante el 2003-2004 para evaluar la funcionalidad familiar (APGAR familiar), la ansiedad y depresión (escala de Goldberg), la presencia de enfermedades (cuidadores y no cuidadores), y la prevalencia del síndrome del cuidador (escala de Zarit). Resultad...

  16. Una lectura de los arcanos mayores desde la caverna platónica

    OpenAIRE

    Arango Agudelo, Alejandro

    2015-01-01

    El presente texto es una experiencia ensayística sobre la reflexión del símbolo, producto de la dialéctica entre la realidad epistémica y las claves del psicoanálisis propuesto por Jung. Desde este encuentro se iluminan algunas interpretaciones de las figuras arquetípicas presentes en los arcanos mayores del Tarot. Está redactado en primera persona del singular y del plural, estructurando un diálogo vitalista entre las percepciones del yo y el inconsciente colectivo.

  17. Fragilidad en el adulto mayor: Un primer acercamiento Frailty in the older adult: A first appraoch

    Directory of Open Access Journals (Sweden)

    Guido Emilio Lluis Ramos

    2004-08-01

    Full Text Available El estado de fragilidad es un síndrome clínico-biológico caracterizado por una disminución de la resistencia y de las reservas fisiológicas del adulto mayor ante situaciones estresantes, a consecuencia del acumulativo desgaste de los sistemas fisiológicos, causando mayor riesgo de sufrir efectos adversos para la salud como: caídas, discapacidad, hospitalización, institucionalización y muerte. La prevalencia reportada oscila entre un 7 y un 12 % en la población mayor de 65 años. La mayoría de los autores coinciden en que las manifestaciones clínicas más comunes son una disminución involuntaria del peso corporal, de la resistencia y de la fuerza muscular, trastornos del equilibrio y de la marcha y una declinación de la movilidad física. Varios estudios han relacionado el síndrome de fragilidad con biomarcadores y reactantes de fase aguda, inflamación, metabolismo y coagulación, en particular: proteína C reactiva, altos niveles del factor VIII de coagulación y fibrinógeno, insulina, glicemia, lípidos y proteínas como la albúmina.The frailty state is a clinical and biological syndrome characterized by a reduction of resistance and of the biological reserves of the older adult to stressing situations as a result of the accumulative waste of the physiological systems, causing higher risk for suffering adverse effects for health, such as. falls, disability, hospitalization, institutionalization and death. The reported prevalence ranged between 7 and 12 % in the population over 65. Most of the authors agree that the most common clinical manifestations are involuntary reduction of body weight, of resistance and of muscle strength, balance and walking disorders and a decrease of physical mobility. Many studies have related the frailty syndrome to biomarkers and reactants of acute stage, inflammation, metabolism and coagulation, in particular: reactive protein C, high levels of coagulation factor VIII and fibrinogen, insulin

  18. ACTIVIDAD FÍSICA EN UN GRUPO DE ADULTOS MAYORES QUE ACUDEN A CENTROS COMUNITARIOS

    OpenAIRE

    Abril Merizalde, Dennys Leonardo; Andrade Trujillo, Catherine Alexandra

    2017-01-01

    La esperanza de vida ha tenido un notable incremento en la actualidad y con ello el aumento de la prevalencia e incidencia de enfermedades como: diabetes tipo 2, enfermedades cardiovasculares, cerebrovasculares y pulmonares. De esta manera el adulto mayor es susceptible al deterioro de su estado nutricional y por lo tanto a una disminución de su funcionalidad e independencia lo que afecta directamente a su calidad de vida. El objetivo del presente estudio es realizar un análisis cuantitativo ...

  19. Caries Radicular en el Adulto Mayor. Revisión Narrativa de Literatura

    Directory of Open Access Journals (Sweden)

    Alberto Carlos Cruz-Gonzáles

    2015-07-01

    Full Text Available La caries radicular (CR se define como una lesión progresiva, crónica, con tejido reblandecido y originada en las raíces dentales expuestas al medio oral. Los adultos mayores son más susceptibles a presentar esta patología que otros grupos etarios, dada su mayor prevalencia de recesiones gingivales. El objetivo del presente artículo es realizar una revisión narrativa de la literatura sobre la caries radicular en el adulto mayor, con el fin de presentar una puesta al día que sirva de guía a los odontólogos para la toma de decisiones clínicas sobre su manejo. Se realizó una búsqueda de artículos en inglés y español, mediante los términos MESH Root Caries (AND Elderly en las bases de datos Pubmed, ScienceDirect, Google Scholar y Scielo, sin restricción para año de publicación. Se incluyeron artículos de investigación en seres humanos y revisiones sistemáticas sobre el tema. Inicialmente se obtuvieron 127 publicaciones de las que se descartaron 13 documentos, luego de la lectura de los resúmenes. Se encontró una alta prevalencia de CR en Colombia y en América Latina (27.6% y 23.71% respectivamente. Entre los factores de riesgo asociados, se reportaron la conservación de un mayor número de dientes en edades avanzadas, la recesión gingival, el acúmulo de biofilm, el uso de prótesis, la ingesta frecuente de azúcares refinados y las alteraciones físicas y cognoscitivas. Se encontró, igualmente, que la localización, el color, la textura superficial y la profundidad de la cavidad son factores determinantes del diagnóstico y el tratamiento de la CR y que la determinación del enfoque terapéutico parte de la clasificación del paciente en un nivel de riesgo.

  20. Personas mayores y sexualidad creativa. El derecho al placer a lo largo de la vida

    OpenAIRE

    Pérez Salanova, Mercè

    2016-01-01

    En este artículo se aborda la sexualidad y afectividad de las personas mayores. Partimos de la relevancia de la diversidad y de las experiencias subjetivas a lo largo del envejecimiento y proponemos una reflexión sobre las pérdidas y el trabajo de duelo marcados por una visión estereotipada de las prácticas sexuales centradas en la genitalidad y en el coito. También nos acercamos a los espacios de sociabilidad como lugares propicios para la comunicación y la muestra de afectos. Por último, no...

  1. Los procedimientos contables de Casa Boris: especial referencia al libro mayor (1872-1886)

    OpenAIRE

    José Paulo Cosenza; Carlos Antonio De Rocchi; Carlos Alberto Campello Ribeiro

    2014-01-01

    Boris Frères & Ltd. Co. (conocida popularmente como Casa Boris, denominación que se utiliza en este trabajo), durante ciento doce años tuvo un papel destacado en la economía de Ceará, una Provincia situada al Nordeste de Brasil. Este artículo examina los registros contables realizados en el Libro Mayor de la Casa Boris entre 1872 y 1886. El objetivo de este estudio es el de dar a conocer los hechos observados en el análisis del contenido de sus registros contables, con el fin de describir las...

  2. Autopercepción de salud general y mortalidad en adultos mayores

    Directory of Open Access Journals (Sweden)

    Ximena Moreno

    2014-05-01

    Conclusiones: Los resultados apoyan los hallazgos previos respecto a que la autopercepción de la salud general negativa predice la mortalidad. Es necesario dilucidar los mecanismos por los que este indicador puede predecir la mortalidad en los adultos mayores, que pueden ser diferentes para hombres y mujeres. Se sugiere investigar el papel de la depresión, considerando que el efecto de la autopercepción de la salud sobre la mortalidad no estaba presente en los estudios que la incluían.

  3. Hipnosis como complemento en la cirugía oral del adulto mayor

    Directory of Open Access Journals (Sweden)

    Elina Muñiz Manzano

    2013-03-01

    Full Text Available Introducción: el envejecimiento poblacional es un fenómeno mundial y la cirugía oral es compleja en los adultos mayores, por lo que la preparación preoperatoria es de vital importancia para una evolución satisfactoria. Este trabajo tiene como objetivo demostrar la eficacia de la hipnosis en pacientes con temor en la cirugía oral del adulto mayor. Métodos: se realizó un estudio descriptivo, transversal, con muestra de 20 pacientes de 60 años o más, atendidos en la consulta de Cirugía Maxilofacial del Hospital Universitario "Comandante Manuel Fajardo", en el año 2011, donde se analizaron las variables edad, sexo, número de sesiones de hipnosis, antecedentes patológicos, diagnósticos más frecuentes y temor. Resultados: el mayor número de pacientes se encontró entre 60-69 años de edad, (70 % y el menor en 70-79, (30 %. El sexo femenino prevaleció con 70 %. El número de sesiones fue en el grupo de 60-69 con 58, con un promedio total de 4 por pacientes. En los antecedentes patológicos más frecuentes fue la hipertensión arterial en 14 (70 % y le siguió la diabetes tipo II en 2 (10 % En los diagnósticos más frecuentes fue la caries de cuarto grado con 10 (50 % seguido por los dientes parodontósicos con 4 (20 %. El temor se midió en una escala confeccionada, en la que los pacientes con cifras de l0, 8 y 7 se redujeron a 4 y 5. Conclusiones: Se demuestra la efectividad de la terapia de hipnosis para disminuir el temor y realizar la cirugía oral en el adulto mayor.

  4. Nanotecnología : ¿beneficios para todos o mayor desigualdad?

    OpenAIRE

    Foladori, Guillermo; Invernizzi, Noelia

    2005-01-01

    Foladori, G., Invernizzi, N. (2005). Nanotecnología: ¿beneficios para todos o mayor desigualdad? Redes, 11(21), 55-75. La nanotecnología promete ser la próxima revolución tecnológica. El mercado de nanopartículas es reducido actualmente, pero se espera que en la próxima década se incremente considerablemente. Aunque es frecuentemente presentada como una tecnología limpia y ampliamente benéfica, la nanotecnología ya está generando considerable debate. Rápidamente han emergido controversias ...

  5. El desarrollo de la competencia mediática en personas mayores : una brecha pendiente

    OpenAIRE

    Hernando Gómez, Ángel; Phillippi, Alejandra

    2013-01-01

    El actual desarrollo de la sociedad de la información trajo consigo el fenómeno de las brechas por superar, en cuanto las posibles estrategias que han sido diseñadas por las distintas instancias gubernamentales para que las personas en general, puedan participar de los beneficios que reporta el actual paradigma de desarrollo. Las personas mayores corresponden a un grupo etario cuyo exponencial incremento poblacional supone un desafío para los diseñadores de políticas públicas. ...

  6. Intervención educativa en adultos mayores con diabetes mellitus en Guatemala

    OpenAIRE

    José Manuel Contreras Tejeda; Arely Díaz Cifuentes; Mayda Díaz Pérez; Aurora Seara Cifuentes

    2014-01-01

    Se realizó un estudio de intervención comunitaria, con el objetivo de incrementar los conocimientos en pacientes diabéticos adultos mayores, pertenecientes al Departamento Alta Verapaz, Cobán, Guatemala; en el período comprendido desde junio de 2011 hasta junio de 2012. El universo de estudio estuvo constituido por los pacientes diabéticos dispensarizados por el médico y la enfermera en el área periférica, conformándose la muestra con 46 de ellos, a los cuales se les evaluó el grado de conoci...

  7. Aprendizaje creativo en personas adultas mayores: la experiencia del Taller Literario del PAIPAM

    OpenAIRE

    Sancho Ugalde, María de los Ángeles

    2011-01-01

    El Taller Literario forma parte de las actividades del Programa de Atención Integral de la Persona Adulta Mayor (PAIPAM) del Centro de Estudios Generales de la Universidad Nacional de Costa Rica. Inició las sesiones de clase en febrero del 2007, en el género lírico; para el año 2008, en cuento; en el 2009, 2010 y 2011 ha sido desarrollado en narrativa. El propósito del taller es ofrecer espacios para el análisis de textos representativos de la literatura universal, latinoamericana y costarric...

  8. hZip2 and hZip3 zinc transporters are down regulated in human prostate adenocarcinomatous glands

    Directory of Open Access Journals (Sweden)

    Franklin Renty B

    2007-06-01

    Full Text Available Abstract Background The normal human prostate glandular epithelium has the unique function of accumulating high levels of zinc. In prostate cancer this capability is lost as an early event in the development of the malignant cells. The mechanism and factors responsible for the ability of the normal epithelial cells to accumulate zinc and the loss of this capability in the malignant cells need to be identified. We previously reported that Zip1 is an important zinc uptake transporter in prostate cells and is down regulated in the malignant cells in situ along with the depletion of zinc levels. In this report we investigated the expression of two other Zip family zinc transporters, Zip2 and Zip3 in malignant versus nonmalignant (normal and BPH glands. Zip2 and Zip3 relative protein levels were determined by immunohistochemistry analysis of human prostate tissue sections. Results Normal and BPH glandular epithelium consistently exhibited the strong presence of both Zip 2 and Zip3; whereas both transporters consistently were essentially non-detectable in the malignant glands. This represents the first report of the expression of Zip3 in human prostate tissue; and more importantly, reveals that ZiP2 and Zip3 are down regulated in malignant cells in situ as we also had demonstrated for Zip1. Zip2 and Zip3 transporter proteins were localized predominantly at the apical cell membrane, which is in contrast to the Zip1 localization at the basolateral membrane. Zip2 and Zip3 seemingly are associated with the re-uptake of zinc from prostatic fluid. Conclusion These results coupled with previous reports implicate Zip2 and Zip3 along with Zip1 as important zinc uptake transporters involved in the unique ability of prostate cells to accumulate high cellular zinc levels. Zip1 is important for the extraction of zinc from circulation as the primary source of cellular zinc. Zip 2 and Zip3 appear to be important for retention of the zinc in the cellular compartment

  9. Indium Doped Zinc Oxide Thin Films Deposited by Ultrasonic Chemical Spray Technique, Starting from Zinc Acetylacetonate and Indium Chloride

    Directory of Open Access Journals (Sweden)

    Rajesh Biswal

    2014-07-01

    Full Text Available The physical characteristics of ultrasonically sprayed indium-doped zinc oxide (ZnO:In thin films, with electrical resistivity as low as 3.42 × 10−3 Ω·cm and high optical transmittance, in the visible range, of 50%–70% is presented. Zinc acetylacetonate and indium chloride were used as the organometallic zinc precursor and the doping source, respectively, achieving ZnO:In thin films with growth rate in the order of 100 nm/min. The effects of both indium concentration and the substrate temperature on the structural, morphological, optical, and electrical characteristics were measured. All the films were polycrystalline, fitting well with hexagonal wurtzite type ZnO. A switching in preferential growth, from (002 to (101 planes for indium doped samples were observed. The surface morphology of the films showed a change from hexagonal slices to triangle shaped grains as the indium concentration increases. Potential applications as transparent conductive electrodes based on the resulting low electrical resistance and high optical transparency of the studied samples are considered.

  10. Effects of zinc supplementation and zinc chelation on in vitro β-cell function in INS-1E cells

    DEFF Research Database (Denmark)

    Nygaard, Sanne Bjørn; Larsen, Agnete; Knuhtsen, Astrid

    2014-01-01

    BACKGROUND: Zinc is essential for the activities of pancreatic β-cells, especially insulin storage and secretion. Insulin secretion leads to co-release of zinc which contributes to the paracrine communication in the pancreatic islets. Zinc-transporting proteins (zinc-regulated transporter, iron......-regulated transporter-like proteins [ZIPs] and zinc transporters [ZnTs]) and metal-buffering proteins (metallothioneins, MTs) tightly regulate intracellular zinc homeostasis. The present study investigated how modulation of cellular zinc availability affects β-cell function using INS-1E cells. RESULTS: Using INS-1E...... cells, we found that zinc supplementation and zinc chelation had significant effects on insulin content and insulin secretion. Supplemental zinc within the physiological concentration range induced insulin secretion. Insulin content was reduced by zinc chelation with N,N,N',N-tektrakis(2-pyridylmethyl...

  11. Serum zinc levels in gestational diabetes

    Directory of Open Access Journals (Sweden)

    Rahimi Sharbaf F

    2008-12-01

    Full Text Available "nBackground: Maternal zinc deficiency during pregnancy has been related to adverse pregnancy outcomes. Most studies in which pregnant women have been supplemented with zinc to examine its effects on the outcome of the pregnancy have been carried out in industrialized countries and the results have been inconclusive. It has been shown that women with gestational diabetes (GDM have lower serum zinc levels than healthy pregnant women, and higher rates of macrosomia. Zinc is required for normal glucose metabolism, and strengthens the insulin-induced transportation of glucose into cells by its effect on the insulin signaling pathway. The purpose of this study was to assess the serum zinc levels of GDM patients and evaluate the effect of zinc supplementation. "nMethods: In the first stage of this prospective controlled study, we enrolled 70 women who were 24-28 weeks pregnant at the Prenatal Care Center of Mirza Kochak Khan Hospital, Tehran, Iran. The serum zinc level of each subject was determined. In the second stage, among these 70 subjects, the diabetics receiving insulin were divided into two groups, only one of which received a zinc supplement and the other group was the control group. Birth weight of neonates and insulin dosages were recorded. "nResults: The mean serum zinc level in the GDM group was lower than that of the control group (94.83 vs. 103.49mg/dl, respectively and the mean birth weight of neonates from the GDM women who received the zinc supplement was lower than that of the control group (3849g vs. 4136g. The rate of macrosomia was lower in the zinc supplemented group (20% vs. 53%. The mean of increase of insulin after receiving the zinc supplement was lower (8.4u vs. 13.53. "nConclusion: Maternal insulin resistance is associated with the accumulation of maternal fat tissue during early stages of pregnancy and greater fetoplacental nutrient availability in later stages, when 70% of fetal growth occurs, resulting in macrosomia. In

  12. Effect of zinc gluconate, sage oil on inflammatory patterns and hyperglycemia in zinc deficient diabetic rats.

    Science.gov (United States)

    Elseweidy, Mohamed M; Ali, Abdel-Moniem A; Elabidine, Nabila Zein; Mursey, Nada M

    2017-11-01

    The relationship between zinc homeostasis and pancreatic function had been established. In this study we aimed firstly to configure the inflammatory pattern and hyperglycemia in zinc deficient diabetic rats. Secondly to illustrate the effect of two selected agents namely Zinc gluconate and sage oil (Salvia Officinalis, family Lamiaceae). Rats were fed on Zinc deficient diet, deionized water for 28days along with Zinc level check up at intervals to achieve zinc deficient state then rats were rendered diabetic through receiving one dose of alloxan monohydrate (120mg/kg) body weight, classified later into 5 subgroups. Treatment with sage oil (0.042mg/kg IP) and Zinc gluconate orally (150mg/kg) body weight daily for 8 weeks significantly reduced serum glucose, C-reactive protein (CRP), Tumor necrosis factor alpha (TNF- α), interleukins-6 1 β, inflammatory8 (IFN ȣ), pancreatic 1L1-β along with an increase in serum Zinc and pancreatic Zinc transporter 8 (ZNT8). Histopathological results of pancreatic tissues showed a good correlation with the biochemical findings. Both sage oil and zinc gluconate induced an improvement in the glycemic and inflammatory states. This may be of value like the therapeutic agent for diabetes. Copyright © 2017 Elsevier Masson SAS. All rights reserved.

  13. [Advances in the research of zinc deficiency and zinc supplementation treatment in patients with severe burns].

    Science.gov (United States)

    Wang, X X; Zhang, M J; Li, X B

    2018-01-20

    Zinc is one of the essential trace elements in human body, which plays an important role in regulating acute inflammatory response, glucose metabolism, anti-oxidation, immune and gastrointestinal function of patients with severe burns. Patients with severe burns may suffer from zinc deficiency because of insufficient amount of zinc intake from the diet and a large amount of zinc lose through wounds and urine. Zinc deficiency may affect their wound healing process and prognosis. This article reviews the characteristics of zinc metabolism in patients with severe burns through dynamic monitoring the plasma and urinary concentration of zinc. An adequate dosage of zinc supplemented to patients with severe burns by an appropriate method can increase the level of zinc in plasma and skin tissue and improve wound healing, as well as reduce the infection rates and mortality. At the same time, it is important to observe the symptoms and signs of nausea, dizziness, leukopenia and arrhythmia in patients with severe burns after supplementing excessive zinc.

  14. Zinc-Laccase Biofuel Cell

    Directory of Open Access Journals (Sweden)

    Abdul Aziz Ahmad

    2011-12-01

    Full Text Available A zinc-laccase biofuel cell adapting the zinc-air cell design features is investigated. A simple cell design configuration is employed: a membraneless single chamber and a freely suspended laccase in a quasi-neutral buffer electrolyte. The cell is characterised according to its open-circuit voltage, polarization profile, power density plot and discharge capacity at constant current. The biocatalytic role of laccase is evident from the polarization profile and power output plot. Performance comparison between a single chamber and dual chamber cell design is also presented. The biofuel cell possessed an open-circuit voltage of 1.2 V and delivered a maximum power density of 0.9 mW/cm2 at current density of 2.5 mA/cm2. These characteristics are comparable to biofuel cell utilising a much more complex system design.KEY WORDS (keyword:  Biofuel cell, Bioelectrochemical cell, Zinc anode, Laccase and Oxidoreductase.ABSTRAK: Sel bio-bahan api zink-laccase dengan adaptasi daripada ciri-ciri rekabentuk sel zink-udara telah dikaji. Sel dengan konfigurasi rekabentuk yang mudah digunapakai: ruangan tunggal tanpa membran dan laccase diampaikan secara bebas di dalam elektrolit pemampan quasi-neutral. Sel dicirikan berdasarkan voltan litar terbuka, profil polarisasi, plot ketumpatan kuasa dan kapasiti discas pada arus malar. Peranan laccase sebagai bio-pemangkin adalah amat ketara daripada profil polarisasi dan plot ketumpatan kuasa. Perbandingan prestasi di antara sel dengan rekabentuk ruangan tunggal and dwi-ruangan turut diketengahkan. Seperti dijangkakan, sel dengan rekabentuk ruangan tunggal menunjukkan kuasa keluaran yang lebih rendah jika dibandingkan dengan rekabentuk dwi-ruangan kemungkinan disebabkan fenomena cas bocor. Sel bio-bahan api ini mempunyai voltan litar terbuka 1.2 V dan memberikan ketumpatan kuasa maksima 0.9 mW/cm2 pada ketumpatan arus 2.5 mA/cm2. Ciri-ciri ini adalah sebanding dengan sel bio-bahan api yang menggunapakai rekabentuk sel

  15. Cash Transfers and Mayoral Elections: The Case of Sao Paulo's Renda Mínima

    Directory of Open Access Journals (Sweden)

    Diego Sanches Corrêa

    2015-08-01

    Full Text Available Several recently published studies analyze the effects of national conditional cash transfer (CCT programs, such as the Brazilian Bolsa Família and the Mexican Oportunidades, on presidential elections. Most of them show that these programs boost incumbents' electoral support among the poor. This research note is the first scholarly attempt to investigate this phenomenon at a lower-level unit of a federal state, by assessing the impact of a municipal cash transfer program on a mayoral election. Specifically, it investigates whether Renda Mínima, the cash transfer program of the city of Sao Paulo, affected beneficiaries' electoral behavior in favor of the incumbent candidate in the 2004 mayoral election. This note analyzes survey data from CEBRAP/IBOPE and shows that cash transfers did, indeed, affect beneficiaries' behavior in the predicted direction, but only in cases where they did not benefit from any other CCT program, such as the federal Bolsa Família or the São Paulo state Renda Cidadã. These results suggest that the pro-incumbent effect of CCT programs may be diluted by similar programs launched by governments at other tiers of a federation, even if they are led by the same party.

  16. Factores asociados a la participación laboral de los adultos mayores mexiquenses

    Directory of Open Access Journals (Sweden)

    Beatriz MILLÁN-LEÓN

    2010-01-01

    Full Text Available La prolongación en la esperanza de vida, los cambios en los arreglos residenciales y familiares, así como la falta de ingresos económicos en la vejez son factores que han contribuido a que la población adulta mayor permanezca en activo en el mercado de trabajo. En el presente artículo se estudia la heterogeneidad que prevalece en la población envejecida del Estado de México con el fi n de evaluar los factores que condicionan en mayor medida su participación laboral actual, utilizando para ello una regresión logística binaria a partir de los datos obtenidos por la ESEDEM 2008. Para los hombres destacan las circunstancias actuales de la vejez, salud y transferencias económicas como principales condicionantes de permanecer activos laboralmente, mientras que para las mujeres resaltan las características de su trayectoria de vida, tales como su estado civil o su historia laboral.

  17. ESTIMULACIÓN BASADA EN MINDFULNESS PARA PERSONAS MAYORES CON ENFERMEDAD DE ALZHEIMER U OTRAS DEMENCIAS

    Directory of Open Access Journals (Sweden)

    Domingo Jesús Quintana Hernández

    2015-09-01

    Full Text Available Los tratamientos psicológicos son una práctica habitual en el contexto sociosanitario de atención a personas mayores dependientes. En los últimos años se está introduciendo la práctica de mindfulness para personas mayores. Sin embargo, estas prácticas presentan dificultades para su aplicación en residencias y centros de día por el deterioro cognitivo que presentan los usuarios de estos servicios. En este artículo se muestra cómo se desarrollo un programa de estimulación basado en mindfulness en el entrenamiento de las actividades de vida diaria (AVD. Esta intervención se fundamenta en el entrenamiento del personal auxiliar y/o cuidador de forma simultánea con los usuarios de los servicios para, posteriormente en la rutina del centro, realizar un entrenamiento de la presencia consciente en la acción durante las AVD. El objetivo final de esta intervención es potenciar la coherencia funcional y la integración personal mediante prácticas de mindfulness en acción en actividades básicas, instrumentales o avanzadas.

  18. Prevalencia de los trastornos del sueño en el adulto mayor

    Directory of Open Access Journals (Sweden)

    Pando-Moreno Manuel

    2001-01-01

    Full Text Available El presente es un estudio realizado con adultos mayores de la Ciudad de Guadalajara, México, que viven en domicilios particulares. De ellos, el 58% de los hombres y el 76% de las mujeres presentaron al menos un síntoma de trastornos del sueño, según el "Cuestionario General de Salud de Goldberg"; el 8,5% registró positivo en el total de los reactivos. Conforme a los criterios del DSM IV, un 33,3% podría ser considerado "caso" de trastorno del sueño. Estos posibles casos estarían asociados al género, al grado de estudio y con la presencia de depresión; pero no con el estado civil ni la edad. Ante la gran cantidad de "posibles casos" encontrados, que no han sido previamente detectados ni se encuentran en ningún tipo de tratamiento ad hoc, se recomienda promover cursos de actualización en esta materia para los profesionales de la salud (principalmente médicos y enfermeras, de manera que se facilite la detección oportuna de los casos, así como incrementar y mejorar la accesibilidad de los servicios de salud mental para la población de la tercera edad, e incrementar las actividades de educación para la salud para el adulto mayor y los cuidadores de éstos.

  19. Prevalencia de los trastornos del sueño en el adulto mayor

    Directory of Open Access Journals (Sweden)

    Manuel Pando-Moreno

    Full Text Available El presente es un estudio realizado con adultos mayores de la Ciudad de Guadalajara, México, que viven en domicilios particulares. De ellos, el 58% de los hombres y el 76% de las mujeres presentaron al menos un síntoma de trastornos del sueño, según el "Cuestionario General de Salud de Goldberg"; el 8,5% registró positivo en el total de los reactivos. Conforme a los criterios del DSM IV, un 33,3% podría ser considerado "caso" de trastorno del sueño. Estos posibles casos estarían asociados al género, al grado de estudio y con la presencia de depresión; pero no con el estado civil ni la edad. Ante la gran cantidad de "posibles casos" encontrados, que no han sido previamente detectados ni se encuentran en ningún tipo de tratamiento ad hoc, se recomienda promover cursos de actualización en esta materia para los profesionales de la salud (principalmente médicos y enfermeras, de manera que se facilite la detección oportuna de los casos, así como incrementar y mejorar la accesibilidad de los servicios de salud mental para la población de la tercera edad, e incrementar las actividades de educación para la salud para el adulto mayor y los cuidadores de éstos.

  20. El imaginario de los adultos mayores sobre la vida después de la muerte

    Directory of Open Access Journals (Sweden)

    Felipe R. Vázquez Palacios

    2013-10-01

    Full Text Available El trabajo analiza el imaginario de los adultos mayores sobre la vida después de la muerte, en una muestra de creyentes mayores de 60 años, todos ellos creyentes católicos, metodistas, adventistas y pentecostales, que viven en la capital del estado de Veracruz, México. La información se llevó a cabo a través de entrevistas a profundidad y prácticas guiadas sobre el tema. La investigación muestra que el imaginario de la vida en el más allá, tiene que ver con acciones y prácticas, con contextos culturales, históricos, económicos, religiosos, costumbres que la sociedad y/o los individuos han acumulado en su vida cotidiana. La pregunta central que esta presente en todo el trabajo es: ¿Qué papel juegan estos imaginarios en la vida terrenal? ¿Cómo dotan de sentido la vida humana cómo la transforman?

  1. Estrategias de provisión de cuidados familiares a personas mayores dependientes

    Directory of Open Access Journals (Sweden)

    Rosa Casado-Mejía

    2013-09-01

    Full Text Available Objetivo: Explorar, identificar y caracterizar las distintas estrategias de provisión de cuidados a mayores dependientes que desarrollan las personas cuidadoras familiares. Metodología: Cualitativa. Unidad de observación: familias sevillanas con mayores dependientes. Unidades de análisis: cuidado, salud, género. Obtención de información: revisión bibliográfica literaria/bases de datos, entrevistas en profundidad, grupo de discusión. Análisis: Semántico y pragmático. Resultados: No existen trabajos indexados. Cuidar sigue siendo femenino, tiene repercusiones negativas en la salud de las personas cuidadoras. Las medidas institucionales son mejores pero insuficientes, no siempre fomentan la autonomía de las cuidadoras. Las familias desarrollan otras formas de cuidar: los hombres se están incorporando, y se contratan. La organización de los cuidados depende del proyecto de vida de la persona cuidadora; nivel económico y mandato de género. Conclusiones: Hay distintas estrategias de provisión de cuidados familiares: Asunción total de cuidados/Gestión en convivencia/Gestión en domicilios separados. Unas protegen más que otras la salud.

  2. Las fortalezas en personas mayores como factor que aumenta el bienestar

    Directory of Open Access Journals (Sweden)

    Encarnación Ramírez-Fernández

    2015-08-01

    Full Text Available En las últimas décadas se ha incrementado el estudio de las fortalezas psicológicas como factor que afecta al bienestar. Éstas pueden ser consideradas como un subconjunto de rasgos de personalidad a los que se otorga un valor moral, definiéndose como cualidades naturales que las personas están intrínsecamente motivada a utilizar porque aumentan la calidad de vida. Las investigaciones demuestran que actúan como factores de protección y prevención de la psicopatología y de los problemas de conducta en las diferentes etapas evolutivas. Hay fortalezas que son más relevantes en personas mayores y su entrenamiento estaría dirigido a influir sobre el comportamiento y el funcionamiento emocional con el objetivo de aumentar la satisfacción con la vida. En el presente trabajo se analizan las fortalezas que predominan en adultos mayores y se propone un programa de intervención para potenciarlas con la finalidad de mejorar su salud y calidad de vida. Se trata de una propuesta novedosa ya que, hasta el momento, las intervenciones en este ámbito han ido encaminadas a paliar diferentes problemas tanto de manera aislada como complemento de terapias de tipo más tradicional pero no como prevención de la aparición de trastornos habituales en edades avanzadas.

  3. Vida Triste y Buen Vivir según personas adultas mayores en Otavalo, Ecuador

    Directory of Open Access Journals (Sweden)

    Juan Tortosa-Martínez

    2014-01-01

    Full Text Available El presente trabajo se basa en el diagnóstico inicial previo de un proyecto de cooperación con una entidad social del Cantón de Otavalo (Ecuador, para incluir la actividad física y el juego en su programa de atención integral de Personas Adultas Mayores (PAM en situación de indigencia. Para conocer el contexto de la población del servicio, sus experiencias previas y sus expectativas, se realizó una investigación basada en sus historias de vida. A su vez, se analizaron las políticas públicas del Buen Vivir y las políticas específicas para personas adultas mayores, analizando la legislación vigente y efectuando entrevistas en profundidad a informantes clave. Con enfoque interdisciplinar, se exponen reflexiones sobre elementos constitutivos de la Vida Triste y Buen Vivir, se destaca la importancia de la intervención integral en la promoción del Buen Vivir de PAM a partir de su pasado, sus puntos de vista y recursos de apoyo del territorio.

  4. Farmacovigilancia de la sertralina en pacientes cubanos con episodio de depresión mayor

    Directory of Open Access Journals (Sweden)

    Leslie Pérez Ruiz

    2011-03-01

    Full Text Available En la depresión predominan síntomas como: desinterés, fatiga, sentimientos de inutilidad, desconcentración, deseos de muerte e insomnio. Entre los medicamentos para tratarla se encuentra la sertralina. Con el objetivo de evaluar su seguridad, se revisaron 40 historias clínicas y cuadernos de recogida de datos de los pacientes incluidos en ensayo clínico fase III, aletatorizado, controlado y a doble ciegas: "Uso de sertralina en pacientes con episodio de depresión mayor", pertenecientes al Hospital "Dr. Gustavo Aldereguía Lima". Se obtuvieron datos demográficos, clínicos y eventos adversos, con los cuales se realizó un estudio descriptivo, observacional y transversal que clasifica como un estudio de utilización de medicamentos sobre consecuencias prácticas. La información fue analizada mediante SPSS, versión 13.0 para Windows. De los 40 pacientes incluidos, 24 presentaron eventos adversos para un 60 %; de ellos, 16 (67 % en el grupo tratado con sertralina y 8 (33 % en los tratados con placebo. Los eventos adversos más frecuentes fueron: disminución de peso, sequedad bucal, cefalea, diarreas y náuseas. En su mayoría resultaron de intensidad ligera, causalidad probable y sin necesidad de tratamiento. El uso del fármaco se consideró seguro en el tratamiento de estos pacientes.

  5. Salud mental en desastres naturales: estrategias interventivas con adultos mayores en sectores rurales de Chile.

    Science.gov (United States)

    Osorio-Parraguez, Paulina; Espinoza, Adriana

    2016-06-01

    En el presente artículo se da a conocer una estrategia de intervención llevada a cabo con adultos mayores en la comuna de Paredones, sexta región de Chile, con posterioridad al terremoto y tsunami del 27 de febrero 2010 en Chile, en el contexto de una investigación sobre fortalezas y vulnerabilidades desplegadas por este grupo etario, con posterioridad a un desastre natural. Se presenta una descripción del desarrollo metodológico de la intervención y de los sustentos teóricos y conceptuales en los que se basa. Como resultado de este proceso, se propone una estrategia que trabaje a través de la identificación de las propias experiencias y fortalezas de los sujetos. De tal forma se minimizan los efectos negativos de los determinantes sociales de la salud (como la edad y el lugar de residencia) en contexto de crisis; permitiendo a los adultos mayores fortalecer sus recursos individuales y colectivos, en pro de su bienestar psicosocial. © The Author(s) 2015.

  6. Aprender de los mayores: un intercambio intergeneracional en los Altos de Chiapas

    Directory of Open Access Journals (Sweden)

    Paola Ortelli

    2012-11-01

    Full Text Available Este artículo trata sobre las ideas que dos generaciones de habitantes de Larráinzar tienen del “buen vivir” en el pueblo. Igualmente, contextualiza un estudio de caso y pone el énfasis en sus características histórico-políticas. Expone la perspectiva de los mayores sobre el papel del sistema de cargos en la formación ético-política de las nuevas generaciones hacia la continuidad de los valores propios. También aborda los procesos de apropiación y reformulación que hacen los jóvenes frente a los problemas contemporáneos en ese municipio. Este artículo nos invita a explorar la comunicación a través de la tradición oral y de los procesos de diálogo entre personas mayores y jóvenes.

  7. Covenant of Mayors initiative—Public perception issues and barriers in Greece

    International Nuclear Information System (INIS)

    Christoforidis, Georgios C.; Chatzisavvas, Konstantinos Ch.; Lazarou, Stavros; Parisses, Costantinos

    2013-01-01

    The Covenant of Mayors (COM) initiative invites cities to commit themselves to reduce voluntarily the greenhouse gas emissions within their territories. This manuscript presents the COM initiative and analyzes its mechanisms. In order to better quantify the penetration of the initiative, the authors introduce suitable “participation factors”. Moreover, a study and a survey are presented concerning the COM initiative in Greece. Certain barriers are identified preventing the realization of the initiative's full potential in Greece. Results from the public survey indicate lack of proper information and communication about the COM initiative and the obligations arising from its signing towards the citizens itself. Nevertheless, once the citizens are informed properly, the public acceptance of the initiative and its commitments is considerable, to the extent that its success would influence the vote of a substantial percentage of citizens. The positive role of supporting structures is evaluated and may be demonstrated through the survey's results and discussion. Recommendations are provided for future or existing signatories based on the findings of this work. - Highlights: • Factors are defined to evaluate the penetration of the Covenant of Mayors initiative. • Barriers are identified preventing the initiative reaching its full potential in Greece. • A survey conducted in Greece shows poor dissemination of the initiative to citizens. • Significant public acceptance is observed once targets and commitments are explained to citizens. • The positive role of Supporting Structures in aiding signatories is appraised

  8. La edad pupilar y la mayoría de edad en la Valencia medieval

    Directory of Open Access Journals (Sweden)

    Obarrio Moreno, Juan Alfredo

    2012-12-01

    Full Text Available The present work considers the study and the juridical consequences of the transition from minority to adulthood in the former Kingdom of Valencia. More specifi cally, it addresses issues such as the necessary presence of the tutor or guardian of the minor, his juridical incapacity or the prohibitions to which they were subjected. Regarding adulthood, the focus is primarily on the so-called benefi t of the age and its application in the contractual sphere.

    El presente trabajo aborda el estudio y las consecuencias jurídicas del tránsito de la edad pupilar a la mayoría de edad en el antiguo Reino de Valencia. En concreto, con relación al menor se abordan cuestiones como la necesaria presencia del tutor o curador para el menor, su incapacidad jurídica o las prohibiciones a las que se hallaban sometidos. Por lo que hace referencia a la mayoría de edad, nos centramos fundamentalmente en el denominado beneficio de la edad y su aplicación en el ámbito contractual.

  9. Prevalencia de hipertransaminasemia con tratamiento antituberculoso en el Centro Médico Naval "Cirujano Mayor Santiago Távara" 2016.

    OpenAIRE

    Alberca Canelo, Yeny Valmeri

    2016-01-01

    Determina la prevalencia de hipertransaminasemia en pacientes con tratamiento antituberculoso en el Centro Médico Naval “Cirujano Mayor Santiago Távara”. El presente estudio busca identificar las características de la hipertransaminasemia, conocer su porcentaje e identificar los factores de riesgo en pacientes con tratamiento antituberculoso puesto que se viene observando un mayor número de pacientes que presentan hipertransaminasemia lo cual genera la suspensión del tratamiento contra la tub...

  10. ZINC MITIGATION INTERIM REPORT - THERMODYNAMIC STUDY

    Energy Technology Data Exchange (ETDEWEB)

    Korinko, P.

    2010-12-17

    An experimental program was initiated in order to develop and validate conditions that will effectively trap Zn vapors that are released during extraction. The proposed work is broken down into three tasks. The first task is to determine the effectiveness of various pore sizes of filter elements. The second task is to determine the effect of filter temperature on zinc vapor deposition. The final task is to determine whether the zinc vapors can be chemically bound. The approach for chemically binding the zinc vapors has two subtasks, the first is a review of literature and thermodynamic calculations and the second is an experimental approach using the best candidates. This report details the results of the thermodynamic calculations to determine feasibility of chemically binding the zinc vapors within the furnace module, specifically the lithium trap (1). A review of phase diagrams, literature, and thermodynamic calculations was conducted to determine if there are suitable materials to capture zinc vapor within the lithium trap of the extraction basket. While numerous elements exist that form compounds with zinc, many of these also form compounds with hydrogen or the water that is present in the TPBARs. This relatively comprehensive review of available data indicates that elemental cobalt and copper and molybdenum trioxide (MoO3) may have the requisite properties to capture zinc and yet not be adversely affected by the extraction gases and should be considered for testing.

  11. Zinc Binding by Lactic Acid Bacteria

    Directory of Open Access Journals (Sweden)

    Jasna Mrvčić

    2009-01-01

    Full Text Available Zinc is an essential trace element in all organisms. A common method for the prevention of zinc deficiency is pharmacological supplementation, especially in a highly available form of a metalloprotein complex. The potential of different microbes to bind essential and toxic heavy metals has recently been recognized. In this work, biosorption of zinc by lactic acid bacteria (LAB has been investigated. Specific LAB were assessed for their ability to bind zinc from a water solution. Significant amount of zinc ions was bound, and this binding was found to be LAB species-specific. Differences among the species in binding performance at a concentration range between 10–90 mg/L were evaluated with Langmuir model for biosorption. Binding of zinc was a fast process, strongly influenced by ionic strength, pH, biomass concentration, and temperature. The most effective metal-binding LAB species was Leuconostoc mesenteroides (27.10 mg of Zn2+ per gram of dry mass bound at pH=5 and 32 °C, during 24 h. FT-IR spectroscopy analysis and electron microscopy demonstrated that passive adsorption and active uptake of the zinc ions were involved.

  12. Pseudomonas aeruginosa Trent and zinc homeostasis.

    Science.gov (United States)

    Davies, Corey B; Harrison, Mark D; Huygens, Flavia

    2017-09-01

    Pseudomonas aeruginosa is a Gram-negative pathogen and the major cause of mortality in patients with cystic fibrosis. The mechanisms that P. aeruginosa strains use to regulate intracellular zinc have an effect on infection, antibiotic resistance and the propensity to form biofilms. However, zinc homeostasis in P. aeruginosa strains of variable infectivity has not been compared. In this study, zinc homeostasis in P. aeruginosa Trent, a highly infectious clinical strain, was compared to that of a laboratory P. aeruginosa strain, ATCC27853. Trent was able to tolerate higher concentrations of additional zinc in rich media than ATCC27853. Further, pre-adaptation to additional zinc enhanced the growth of Trent at non-inhibitory concentrations but the impact of pre-adaption on the growth of ATCC27853 under the same conditions was minimal. The results establish clear differences in zinc-induced responses in Trent and ATCC27853, and how zinc homeostasis can be a promising target for the development of novel antimicrobial strategies for P. aeruginosa infection in cystic fibrosis patients. © FEMS 2017. All rights reserved. For permissions, please e-mail: journals.permissions@oup.com.

  13. and gallium-doped zinc oxide transparent conducting sol–gel thin films

    Indian Academy of Sciences (India)

    Administrator

    and 1∙76 × 10–2 Ω cm for GZO, when five multilayer coatings are made. The origin of ... indium source make its price increasing every day. On the other hand, zinc ..... Zhao Q, Xu X Y, Song X F, Zhang X Z, Yu D P, Li C P and. Guo L 2006 Appl.

  14. Lead, zinc and pHconcentrationsof Enyigba soils in Abakaliki Local ...

    African Journals Online (AJOL)

    STORAGESEVER

    2008-07-18

    Jul 18, 2008 ... Abakaliki Local Government Area of Ebonyi State,. Nigeria. F. N. Nweke1 ... establish a base line pollution index for lead and zinc in Enyigba soil as an exogenous source of these .... is done to reduce the pH value of the soil.

  15. Zinc-enriched boutons in rat spinal cord

    DEFF Research Database (Denmark)

    Schrøder, H D; Danscher, G; Jo, S M

    2000-01-01

    The rat spinal cord reveals a complex pattern of zinc-enriched (ZEN) boutons. As a result of in vivo exposure to selenide ions, nanosized clusters of zinc selenide are created in places where zinc ions are present, including the zinc-containing synaptic vesicles of ZEN boutons. The clusters can...

  16. Zinc, nitrogen and salinity interaction on agronomic traits and some ...

    African Journals Online (AJOL)

    use

    2011-11-23

    Nov 23, 2011 ... percentage decreased due to nitrogen, zinc and salinity in the first year but .... Analysis of variance on canola traits affected by nitrogen, zinc and salinity at ...... a result less of the latter are available for fat synthesis ... Na+ and Cl- in plant tissues, effects of nitrogen and zinc ... Zinc alleviates cadmium-induced.

  17. Zinc electrode shape change II. Process and mechanism

    NARCIS (Netherlands)

    Einerhand, R.E.F.; Visscher, W.; de Goeij, J.J.M.; Barendrecht, E.

    1991-01-01

    The process and mechanism of zinc electrode shape change is investigated with the radiotracer technique. It is shownthat during repeated cycling of the nickel oxide/zinc battery zinc material is transported over the zinc electrode via the battery electrolyte. During charge as well as during

  18. Factores que inciden en la calidad de vida de las personas adultas mayores

    Directory of Open Access Journals (Sweden)

    Mabel Granados Hernández

    2015-07-01

    Full Text Available Introducción. El objetivo de este artículo es presentar los resultados del proyecto de investigación No.421-B1-234  de la Escuela de Enfermería de la Universidad de Costa Rica, Práctica de enfermería basada en la evidencia para mejorar la calidad de vida de las personas adultas mayores, el cual pertenece al proyecto No. 421-B1-910 Programa para la Colaboración para la Investigación de Enfermería Basada en la Evidencia de Costa Rica. En este escrito se presenta una revisión teórica de los trabajos más importantes respecto de dicha temática, con el objetivo de aclarar qué factores y variables son los que inciden en tener una mayor calidad de vida en la actualidad en las personas adultas mayores.Método. La metodología utilizada es la que se recomienda para desarrollar la práctica clínica basada en la evidencia con sus respectivas etapas. En cuanto a los documentos, inicialmente se recuperó un total de 504 de diferentes bases de datos incluyendo PUBMED, EBSCO, LILACS, CINAHL, y COCHRANE, de los cuales únicamente 30 fueron retenidos ya que incluían revisiones de literatura, estudios primarios, y marcos conceptuales relevantes para la pregunta clínica. Finalmente, por su contenido, seis  se emplearon para el análisis y la lectura crítica por su estructura metodológica, y calidad, dado que fundamentan indirectamente la respuesta a la pregunta clínica que guió el presente estudio.Resultados.  Se evidencia que la musicoterapia puede tener un efecto positivo en la calidad de vida de las personas adultas mayores, la cual puede ser influida por factores individuales, sociales, culturales, y ambientales, el uso de dispositivos electrónicos, la conectividad social, la respuesta adaptativa y la interacción positiva con otras personas. Por último, las implicaciones para la investigación, práctica de enfermería, política, y conocimiento enfermero son discutidos de manera detallada.Conclusión. Existe necesidad de desarrollar

  19. Flame synthesis of zinc oxide nanocrystals

    Energy Technology Data Exchange (ETDEWEB)

    Merchan-Merchan, Wilson, E-mail: wmerchan-merchan@ou.edu [School of Aerospace and Mechanical Engineering, University of Oklahoma, Norman, OK 73019 (United States); Farahani, Moien Farmahini [School of Aerospace and Mechanical Engineering, University of Oklahoma, Norman, OK 73019 (United States)

    2013-02-01

    Highlights: Black-Right-Pointing-Pointer We report a single-step flame method for the synthesis of Zn oxide nanocrystals. Black-Right-Pointing-Pointer Diverse flame positions lead to a variation of Zn oxide nanocrystal growth. Black-Right-Pointing-Pointer The synthesized crystals have polyhedral, pipet- and needle-like shape. Black-Right-Pointing-Pointer High length-to-diameter aspect-ratio crystals appear in a higher temperature flame. Black-Right-Pointing-Pointer The crystal growth mechanism corresponds to vapor-to-solid conversion. - Abstract: Distinctive zinc oxide (ZnO) nanocrystals were synthesized on the surface of Zn probes using a counter-flow flame medium formed by methane/acetylene and oxygen-enriched air streams. The source material, a zinc wire with a purity of {approx}99.99% and diameter of 1 mm, was introduced through a sleeve into the oxygen rich region of the flame. The position of the probe/sleeve was varied within the flame medium resulting in growth variation of ZnO nanocrystals on the surface of the probe. The shape and structural parameters of the grown crystals strongly depend on the flame position. Structural variations of the synthesized crystals include single-crystalline ZnO nanorods and microprisms (ZMPs) (the ZMPs have less than a few micrometers in length and several hundred nanometers in cross section) with a large number of facets and complex axial symmetry with a nanorod protruding from their tips. The protruding rods are less than 100 nm in diameter and lengths are less than 1 {mu}m. The protruding nanorods can be elongated several times by increasing the residence time of the probe/sleeve inside the oxygen-rich flame or by varying the flame position. At different flame heights, nanorods having higher length-to-diameter aspect-ratio can be synthesized. A lattice spacing of {approx}0.26 nm was measured for the synthesized nanorods, which can be closely correlated with the (0 0 2) interplanar spacing of hexagonal ZnO (Wurtzite) cells

  20. Implication of zinc excess on soil health.

    Science.gov (United States)

    Wyszkowska, Jadwiga; Boros-Lajszner, Edyta; Borowik, Agata; Baćmaga, Małgorzata; Kucharski, Jan; Tomkiel, Monika

    2016-01-01

    This study was undertaken to evaluate zinc's influence on the resistance of organotrophic bacteria, actinomyces, fungi, dehydrogenases, catalase and urease. The experiment was conducted in a greenhouse of the University of Warmia and Mazury (UWM) in Olsztyn, Poland. Plastic pots were filled with 3 kg of sandy loam with pHKCl - 7.0 each. The experimental variables were: zinc applied to soil at six doses: 100, 300, 600, 1,200, 2,400 and 4,800 mg of Zn(2+) kg(-1) in the form of ZnCl2 (zinc chloride), and species of plant: oat (Avena sativa L.) cv. Chwat and white mustard (Sinapis alba) cv. Rota. Soil without the addition of zinc served as the control. During the growing season, soil samples were subjected to microbiological analyses on experimental days 25 and 50 to determine the abundance of organotrophic bacteria, actinomyces and fungi, and the activity of dehydrogenases, catalase and urease, which provided a basis for determining the soil resistance index (RS). The physicochemical properties of soil were determined after harvest. The results of this study indicate that excessive concentrations of zinc have an adverse impact on microbial growth and the activity of soil enzymes. The resistance of organotrophic bacteria, actinomyces, fungi, dehydrogenases, catalase and urease decreased with an increase in the degree of soil contamination with zinc. Dehydrogenases were most sensitive and urease was least sensitive to soil contamination with zinc. Zinc also exerted an adverse influence on the physicochemical properties of soil and plant development. The growth of oat and white mustard plants was almost completely inhibited in response to the highest zinc doses of 2,400 and 4,800 mg Zn(2+) kg(-1).

  1. Study of iron-zinc catalysts by Moessbauer spectroscopy

    International Nuclear Information System (INIS)

    Arriola, S.H.

    1990-01-01

    The Moessbauer parameters were determined on a series of catalyst mixtures of iron and zinc oxides with variable quantities of zinc. A change in the crystal structure of the iron oxide when introducing zinc into the samples was observed. The corundum structure of the α-Fe 2 O 3 phase was transformed into the spinel type of zinc ferrite when zinc oxide was present in any quantity. A strong electronic interaction between the zinc ferrite and the zinc oxide present in excess was evident. The catalysts were analyzed using x-ray fluorescence and x-ray diffraction methods. (author) 10 refs.; 4 figs.; 2 tabs

  2. The zinc dyshomeostasis hypothesis of Alzheimer's disease.

    Directory of Open Access Journals (Sweden)

    Travis J A Craddock

    Full Text Available Alzheimer's disease (AD is the most common form of dementia in the elderly. Hallmark AD neuropathology includes extracellular amyloid plaques composed largely of the amyloid-β protein (Aβ, intracellular neurofibrillary tangles (NFTs composed of hyper-phosphorylated microtubule-associated protein tau (MAP-tau, and microtubule destabilization. Early-onset autosomal dominant AD genes are associated with excessive Aβ accumulation, however cognitive impairment best correlates with NFTs and disrupted microtubules. The mechanisms linking Aβ and NFT pathologies in AD are unknown. Here, we propose that sequestration of zinc by Aβ-amyloid deposits (Aβ oligomers and plaques not only drives Aβ aggregation, but also disrupts zinc homeostasis in zinc-enriched brain regions important for memory and vulnerable to AD pathology, resulting in intra-neuronal zinc levels, which are either too low, or excessively high. To evaluate this hypothesis, we 1 used molecular modeling of zinc binding to the microtubule component protein tubulin, identifying specific, high-affinity zinc binding sites that influence side-to-side tubulin interaction, the sensitive link in microtubule polymerization and stability. We also 2 performed kinetic modeling showing zinc distribution in extra-neuronal Aβ deposits can reduce intra-neuronal zinc binding to microtubules, destabilizing microtubules. Finally, we 3 used metallomic imaging mass spectrometry (MIMS to show anatomically-localized and age-dependent zinc dyshomeostasis in specific brain regions of Tg2576 transgenic, mice, a model for AD. We found excess zinc in brain regions associated with memory processing and NFT pathology. Overall, we present a theoretical framework and support for a new theory of AD linking extra-neuronal Aβ amyloid to intra-neuronal NFTs and cognitive dysfunction. The connection, we propose, is based on β-amyloid-induced alterations in zinc ion concentration inside neurons affecting stability of

  3. The zinc dyshomeostasis hypothesis of Alzheimer's disease.

    Science.gov (United States)

    Craddock, Travis J A; Tuszynski, Jack A; Chopra, Deepak; Casey, Noel; Goldstein, Lee E; Hameroff, Stuart R; Tanzi, Rudolph E

    2012-01-01

    Alzheimer's disease (AD) is the most common form of dementia in the elderly. Hallmark AD neuropathology includes extracellular amyloid plaques composed largely of the amyloid-β protein (Aβ), intracellular neurofibrillary tangles (NFTs) composed of hyper-phosphorylated microtubule-associated protein tau (MAP-tau), and microtubule destabilization. Early-onset autosomal dominant AD genes are associated with excessive Aβ accumulation, however cognitive impairment best correlates with NFTs and disrupted microtubules. The mechanisms linking Aβ and NFT pathologies in AD are unknown. Here, we propose that sequestration of zinc by Aβ-amyloid deposits (Aβ oligomers and plaques) not only drives Aβ aggregation, but also disrupts zinc homeostasis in zinc-enriched brain regions important for memory and vulnerable to AD pathology, resulting in intra-neuronal zinc levels, which are either too low, or excessively high. To evaluate this hypothesis, we 1) used molecular modeling of zinc binding to the microtubule component protein tubulin, identifying specific, high-affinity zinc binding sites that influence side-to-side tubulin interaction, the sensitive link in microtubule polymerization and stability. We also 2) performed kinetic modeling showing zinc distribution in extra-neuronal Aβ deposits can reduce intra-neuronal zinc binding to microtubules, destabilizing microtubules. Finally, we 3) used metallomic imaging mass spectrometry (MIMS) to show anatomically-localized and age-dependent zinc dyshomeostasis in specific brain regions of Tg2576 transgenic, mice, a model for AD. We found excess zinc in brain regions associated with memory processing and NFT pathology. Overall, we present a theoretical framework and support for a new theory of AD linking extra-neuronal Aβ amyloid to intra-neuronal NFTs and cognitive dysfunction. The connection, we propose, is based on β-amyloid-induced alterations in zinc ion concentration inside neurons affecting stability of polymerized

  4. Sensores de zinc para aplicaciones en neurociencias

    OpenAIRE

    Estela Falla, Aldo David; Estela Falla, Aldo David; Estela Falla, Aldo David

    2011-01-01

    En los últimos años, los estudios realizados con respecto a la química involucrada en los procesos neurológicos han logrado dar una idea de la importancia del zinc en las funciones nerviosas, así como también en el estudio de enfermedades neurodegenerativas tales como la Enfermedad de Alzheimer. A nivel biológico, el zinc tiene representantes en los seis grupos de enzimas que existen, lo cual demuestra su gran importancia en los sistemas biológicos. En estas enzimas, el zinc como ion metál...

  5. Zinc Deficiency in Humans and its Amelioration

    OpenAIRE

    Yashbir Singh Shivay

    2015-01-01

    Zinc (Zn) deficiency in humans has recently received considerable attention. Global mortality in children under 5 years of age in 2004 due to Zn deficiency was estimated at 4,53,207 as against 6,66,771 for vitamin A deficiency; 20,854 for iron deficiency and 3,619 for iodine deficiency. In humans 2800-3000 proteins contain Zn prosthetic group and Zn is an integral component of zinc finger prints that regulate DNA transcription. Zinc is a Type-2 nutrient, which means that its concentration in ...

  6. Spectrophotometric determination of zinc in impure solutions

    International Nuclear Information System (INIS)

    Rodriguez Hernandez, B.; Reyes Tamaral, A.

    1972-01-01

    A dithizone colorimetric method is described for determining zinc concentrations of 0.001 to 5 g/l in aqueous solutions from Rio Tinto Mines, containing copper, iron and other impurities. Citrate, cyanide and bis-2hydroxyethyl)-dithiocarbamate are added to the aqueous sample of masking several metals, and zinc is extracted at pH 5 with a solution of dithizone in carbon tetrachloride. Excess of dithizone is removed with sodium sulphide, and optical density of zinc dithionate in organic solution is measured at 5.35 nm. Calibration curves obey Beer's law up to 0.5 micro Zn/ml. (Author) 5 refs

  7. Zinc oxide nanoparticles for water disinfection

    Directory of Open Access Journals (Sweden)

    Emelita Asuncion S. Dimapilis

    2018-03-01

    Full Text Available The world faces a growing challenge for adequate clean water due to threats coming from increasing demand and decreasing supply. Although there are existing technologies for water disinfection, their limitations, particularly the formation of disinfection-by-products, have led to researches on alternative methods. Zinc oxide, an essential chemical in the rubber and pharmaceutical industries, has attracted interest as antimicrobial agent. In nanoscale, zinc oxide has shown antimicrobial properties which make its potential great for various applications. This review discusses the synthesis of zinc oxide with focus on precipitation method, its antimicrobial property and the factors affecting it, disinfection mechanisms, and the potential application to water disinfection.

  8. Clinical Aspects of Trace Elements: Zinc in Human Nutrition – Zinc Deficiency and Toxicity

    Directory of Open Access Journals (Sweden)

    Michelle M Pluhator

    1996-01-01

    Full Text Available Available evidence suggests that trace elements, such as zinc, once thought to have no nutritional relevance, are possibly deficient in large sections of the human population. Conditioned deficiencies have been reported to result from malabsorption syndromes, acrodermatitis enteropathica, alcoholism, gastrointestinal disease, thermal injury, chronic diseases (eg, diabetes, sickle cell anemia, and in total parenteral nutrition therapy. Awareness that patients with these problems are at risk has led health professionals to focus increasingly on the importance of zinc therapy in the prevention and treatment of deficiency. More recently zinc toxicity and its role in human nutrition and well-being have come under investigation. Reports have focused on the role of zinc toxicity in causes of copper deficiency, changes in the immune system and alterations in blood lipids. As the numerous challenges presented by the study of zinc in human nutrition are met, more appropriate recommendations for dietary and therapeutic zinc intake are being made.

  9. 40 CFR 421.286 - Pretreatment standards for new sources.

    Science.gov (United States)

    2010-07-01

    ... GUIDELINES AND STANDARDS NONFERROUS METALS MANUFACTURING POINT SOURCE CATEGORY Secondary Tantalum Subcategory... Nickel 11.110 7.474 Zinc 20.600 8.484 Tantalum 9.090 (c) Tantalum sludge leach and rinse. PSNS for the...

  10. Intestinal absorption and excretion of zinc in streptozotocin-diabetic rats as affected by dietary zinc and protein

    International Nuclear Information System (INIS)

    Johnson, W.T.; Canfield, W.K.

    1985-01-01

    65 Zn was used to examine the effects of dietary zinc and protein on true zinc absorption and intestinal excretion of endogenous zinc by an isotope dilution technique in streptozotocin-diabetic and control rats. Four groups each of diabetic and control rats were fed diets containing 20 ppm Zn, 20% egg white protein (HMHP); 20 ppm Zn, 10% egg white protein (HMLP); 10 ppm Zn, 20% egg white protein (LMHP); and 10 ppm Zn, 10% egg white protein (LMLP). Measurement of zinc balance was begun 9 d after an i.m. injection of 65 Zn. True zinc absorption and the contribution of endogenous zinc to fecal zinc excretion were calculated from the isotopically labeled and unlabeled zinc in the feces, duodenum and kidney. Results from the isotope dilution study indicated that diabetic rats, but not control rats, absorbed more zinc from 20 ppm zinc diets than from 10ppm zinc diets and that all rats absorbed more zinc from 20% protein diets than from 10% protein diets. Furthermore, all rats excreted more endogenous zinc from their intestines when dietary zinc and protein levels resulted in greater zinc absorption. In diabetic and control rats, consuming equivalent amounts of zinc, the amount of zinc absorbed was not significantly different, but the amount of zinc excreted by the intestine was less in the diabetic rats. Decreased intestinal excretion of endogenous zinc may be a homeostatic response to the increased urinary excretion of endogenous zinc in the diabetic rats and may also lead to the elevated zinc concentrations observed in some organs of the diabetic rats

  11. Nanocarrier-mediated foliar zinc fertilization influences expression of metal homeostasis related genes in flag leaves and enhances gluten content in durum wheat.

    Science.gov (United States)

    Deshpande, Paresh; Dapkekar, Ashwin; Oak, Manoj; Paknikar, Kishore; Rajwade, Jyutika

    2018-01-01

    Wheat is the staple food for most of the world's population; however, it is a poor source of zinc. Foliar fertilization of zinc via zinc loaded chitosan nanocarriers (Zn-CNP) post-anthesis has proved to be a promising approach for grain zinc enhancement in durum wheat as evidenced in our earlier study. However, the molecular mechanism of uptake of zinc via Zn-CNP remains unclear. Foliar application of Zn-CNP was performed at post anthesis stages in two durum wheat cultivars (MACS 3125 and UC1114, containing the Gpc-B1 gene), and expression levels of several metal-related genes were analyzed during early senescence. Zn-CNP application indeed caused changes in gene expression as revealed by qPCR data on representative genes involved in metal homeostasis, phloem transporters, and leaf senescence. Furthermore, zinc-regulated transporters and iron (Fe)-regulated transporter-like protein (ZIP) family [ZIP1, ZIP7, ZIP15], CA (carbonic anhydrase), and DMAS (2'-deoxymugineic acid synthase) in flag leaves exhibited significant correlation with zinc content in the seeds. The analysis of grain endosperm proteins showed enhancement of gamma gliadins while other gluten subunits decreased. Gene expression within ZIP family members varied with the type of cultivar mostly attributed to the Gpc-B1, concentration of external zinc ions as well as the type of tissue analyzed. Correlation analysis revealed the involvement of the selected genes in zinc enhancement. At the molecular level, uptake of zinc via Zn-CNP nanocarrier was comparable to the uptake of zinc via common zinc fertilizers i.e. ZnSO4.

  12. Nanocarrier-mediated foliar zinc fertilization influences expression of metal homeostasis related genes in flag leaves and enhances gluten content in durum wheat.

    Directory of Open Access Journals (Sweden)

    Paresh Deshpande

    Full Text Available Wheat is the staple food for most of the world's population; however, it is a poor source of zinc. Foliar fertilization of zinc via zinc loaded chitosan nanocarriers (Zn-CNP post-anthesis has proved to be a promising approach for grain zinc enhancement in durum wheat as evidenced in our earlier study. However, the molecular mechanism of uptake of zinc via Zn-CNP remains unclear.Foliar application of Zn-CNP was performed at post anthesis stages in two durum wheat cultivars (MACS 3125 and UC1114, containing the Gpc-B1 gene, and expression levels of several metal-related genes were analyzed during early senescence. Zn-CNP application indeed caused changes in gene expression as revealed by qPCR data on representative genes involved in metal homeostasis, phloem transporters, and leaf senescence. Furthermore, zinc-regulated transporters and iron (Fe-regulated transporter-like protein (ZIP family [ZIP1, ZIP7, ZIP15], CA (carbonic anhydrase, and DMAS (2'-deoxymugineic acid synthase in flag leaves exhibited significant correlation with zinc content in the seeds. The analysis of grain endosperm proteins showed enhancement of gamma gliadins while other gluten subunits decreased. Gene expression within ZIP family members varied with the type of cultivar mostly attributed to the Gpc-B1, concentration of external zinc ions as well as the type of tissue analyzed. Correlation analysis revealed the involvement of the selected genes in zinc enhancement.At the molecular level, uptake of zinc via Zn-CNP nanocarrier was comparable to the uptake of zinc via common zinc fertilizers i.e. ZnSO4.

  13. Investigations into Recycling Zinc from Used Metal Oxide Varistors via pH Selective Leaching: Characterization, Leaching, and Residue Analysis

    Science.gov (United States)

    Gutknecht, Toni; Gustafsson, Anna; Forsgren, Christer; Steenari, Britt-Marie

    2015-01-01

    Metal oxide varistors (MOVs) are a type of resistor with significantly nonlinear current-voltage characteristics commonly used in power lines to protect against overvoltages. If a proper recycling plan is developed MOVs can be an excellent source of secondary zinc because they contain over 90 weight percent zinc oxide. The oxides of antimony, bismuth, and to a lesser degree cobalt, manganese, and nickel are also present in varistors. Characterization of the MOV showed that cobalt, nickel, and manganese were not present in the varistor material at concentrations greater than one weight percent. This investigation determined whether a pH selective dissolution (leaching) process can be utilized as a starting point for hydrometallurgical recycling of the zinc in MOVs. This investigation showed it was possible to selectively leach zinc from the MOV without coleaching of bismuth and antimony by selecting a suitable pH, mainly higher than 3 for acids investigated. It was not possible to leach zinc without coleaching of manganese, cobalt, and nickel. It can be concluded from results obtained with the acids used, acetic, hydrochloric, nitric, and sulfuric, that sulfate leaching produced the most desirable results with respect to zinc leaching and it is also used extensively in industrial zinc production. PMID:26421313

  14. Investigations into Recycling Zinc from Used Metal Oxide Varistors via pH Selective Leaching: Characterization, Leaching, and Residue Analysis

    Directory of Open Access Journals (Sweden)

    Toni Gutknecht

    2015-01-01

    Full Text Available Metal oxide varistors (MOVs are a type of resistor with significantly nonlinear current-voltage characteristics commonly used in power lines to protect against overvoltages. If a proper recycling plan is developed MOVs can be an excellent source of secondary zinc because they contain over 90 weight percent zinc oxide. The oxides of antimony, bismuth, and to a lesser degree cobalt, manganese, and nickel are also present in varistors. Characterization of the MOV showed that cobalt, nickel, and manganese were not present in the varistor material at concentrations greater than one weight percent. This investigation determined whether a pH selective dissolution (leaching process can be utilized as a starting point for hydrometallurgical recycling of the zinc in MOVs. This investigation showed it was possible to selectively leach zinc from the MOV without coleaching of bismuth and antimony by selecting a suitable pH, mainly higher than 3 for acids investigated. It was not possible to leach zinc without coleaching of manganese, cobalt, and nickel. It can be concluded from results obtained with the acids used, acetic, hydrochloric, nitric, and sulfuric, that sulfate leaching produced the most desirable results with respect to zinc leaching and it is also used extensively in industrial zinc production.

  15. Roles of zinc and metallothionein-3 in oxidative stress-induced lysosomal dysfunction, cell death, and autophagy in neurons and astrocytes.

    Science.gov (United States)

    Lee, Sook-Jeong; Koh, Jae-Young

    2010-10-26

    Zinc dyshomeostasis has been recognized as an important mechanism for cell death in acute brain injury. An increase in the level of free or histochemically reactive zinc in astrocytes and neurons is considered one of the major causes of death of these cells in ischemia and trauma. Although zinc dyshomeostasis can lead to cell death via diverse routes, the major pathway appears to involve oxidative stress.Recently, we found that a rise of zinc in autophagic vacuoles, including autolysosomes, is a prerequisite for lysosomal membrane permeabilization and cell death in cultured brain cells exposed to oxidative stress conditions. The source of zinc in this process is likely redox-sensitive zinc-binding proteins such as metallothioneins, which release zinc under oxidative conditions. Of the metallothioneins, metallothionein-3 is especially enriched in the central nervous system, but its physiologic role in this tissue is not well established. Like other metallothioneins, metallothionein-3 may function as metal detoxicant, but is also known to inhibit neurite outgrowth and, sometimes, promote neuronal death, likely by serving as a source of toxic zinc release. In addition, metallothionein-3 regulates lysosomal functions. In the absence of metallothionein-3, there are changes in lysosome-associated membrane protein-1 and -2, and reductions in certain lysosomal enzymes that result in decreased autophagic flux. This may have dual effects on cell survival. In acute oxidative injury, zinc dyshomeostasis and lysosomal membrane permeabilization are diminished in metallothionein-3 null cells, resulting in less cell death. But over the longer term, diminished lysosomal function may lead to the accumulation of abnormal proteins and cause cytotoxicity.The roles of zinc and metallothionein-3 in autophagy and/or lysosomal function have just begun to be investigated. In light of evidence that autophagy and lysosomes may play significant roles in the pathogenesis of various neurological

  16. Roles of zinc and metallothionein-3 in oxidative stress-induced lysosomal dysfunction, cell death, and autophagy in neurons and astrocytes

    Directory of Open Access Journals (Sweden)

    Lee Sook-Jeong

    2010-10-01

    Full Text Available Abstract Zinc dyshomeostasis has been recognized as an important mechanism for cell death in acute brain injury. An increase in the level of free or histochemically reactive zinc in astrocytes and neurons is considered one of the major causes of death of these cells in ischemia and trauma. Although zinc dyshomeostasis can lead to cell death via diverse routes, the major pathway appears to involve oxidative stress. Recently, we found that a rise of zinc in autophagic vacuoles, including autolysosomes, is a prerequisite for lysosomal membrane permeabilization and cell death in cultured brain cells exposed to oxidative stress conditions. The source of zinc in this process is likely redox-sensitive zinc-binding proteins such as metallothioneins, which release zinc under oxidative conditions. Of the metallothioneins, metallothionein-3 is especially enriched in the central nervous system, but its physiologic role in this tissue is not well established. Like other metallothioneins, metallothionein-3 may function as metal detoxicant, but is also known to inhibit neurite outgrowth and, sometimes, promote neuronal death, likely by serving as a source of toxic zinc release. In addition, metallothionein-3 regulates lysosomal functions. In the absence of metallothionein-3, there are changes in lysosome-associated membrane protein-1 and -2, and reductions in certain lysosomal enzymes that result in decreased autophagic flux. This may have dual effects on cell survival. In acute oxidative injury, zinc dyshomeostasis and lysosomal membrane permeabilization are diminished in metallothionein-3 null cells, resulting in less cell death. But over the longer term, diminished lysosomal function may lead to the accumulation of abnormal proteins and cause cytotoxicity. The roles of zinc and metallothionein-3 in autophagy and/or lysosomal function have just begun to be investigated. In light of evidence that autophagy and lysosomes may play significant roles in the

  17. Potential ecological risk assessment and predicting zinc accumulation in soils

    OpenAIRE

    Baran, Agnieszka; Wieczorek, Jerzy; Mazurek, Ryszard; Urbański, Krzysztof; Klimkowicz-Pawlas, Agnieszka

    2017-01-01

    The aims of this study were to investigate zinc content in the studied soils; evaluate the efficiency of geostatistics in presenting spatial variability of zinc in the soils; assess bioavailable forms of zinc in the soils and to assess soil–zinc binding ability; and to estimate the potential ecological risk of zinc in soils. The study was conducted in southern Poland, in the Malopolska Province. This area is characterized by a great diversity of geological structures and types of land use and...

  18. Modulation of extrasynaptic NMDA receptors by synaptic and tonic zinc.

    Science.gov (United States)

    Anderson, Charles T; Radford, Robert J; Zastrow, Melissa L; Zhang, Daniel Y; Apfel, Ulf-Peter; Lippard, Stephen J; Tzounopoulos, Thanos

    2015-05-19

    Many excitatory synapses contain high levels of mobile zinc within glutamatergic vesicles. Although synaptic zinc and glutamate are coreleased, it is controversial whether zinc diffuses away from the release site or whether it remains bound to presynaptic membranes or proteins after its release. To study zinc transmission and quantify zinc levels, we required a high-affinity rapid zinc chelator as well as an extracellular ratiometric fluorescent zinc sensor. We demonstrate that tricine, considered a preferred chelator for studying the role of synaptic zinc, is unable to efficiently prevent zinc from binding low-nanomolar zinc-binding sites, such as the high-affinity zinc-binding site found in NMDA receptors (NMDARs). Here, we used ZX1, which has a 1 nM zinc dissociation constant and second-order rate constant for binding zinc that is 200-fold higher than those for tricine and CaEDTA. We find that synaptic zinc is phasically released during action potentials. In response to short trains of presynaptic stimulation, synaptic zinc diffuses beyond the synaptic cleft where it inhibits extrasynaptic NMDARs. During higher rates of presynaptic stimulation, released glutamate activates additional extrasynaptic NMDARs that are not reached by synaptically released zinc, but which are inhibited by ambient, tonic levels of nonsynaptic zinc. By performing a ratiometric evaluation of extracellular zinc levels in the dorsal cochlear nucleus, we determined the tonic zinc levels to be low nanomolar. These results demonstrate a physiological role for endogenous synaptic as well as tonic zinc in inhibiting extrasynaptic NMDARs and thereby fine tuning neuronal excitability and signaling.

  19. Modulation of extrasynaptic NMDA receptors by synaptic and tonic zinc

    Science.gov (United States)

    Anderson, Charles T.; Radford, Robert J.; Zastrow, Melissa L.; Zhang, Daniel Y.; Apfel, Ulf-Peter; Lippard, Stephen J.; Tzounopoulos, Thanos

    2015-01-01

    Many excitatory synapses contain high levels of mobile zinc within glutamatergic vesicles. Although synaptic zinc and glutamate are coreleased, it is controversial whether zinc diffuses away from the release site or whether it remains bound to presynaptic membranes or proteins after its release. To study zinc transmission and quantify zinc levels, we required a high-affinity rapid zinc chelator as well as an extracellular ratiometric fluorescent zinc sensor. We demonstrate that tricine, considered a preferred chelator for studying the role of synaptic zinc, is unable to efficiently prevent zinc from binding low-nanomolar zinc-binding sites, such as the high-affinity zinc-binding site found in NMDA receptors (NMDARs). Here, we used ZX1, which has a 1 nM zinc dissociation constant and second-order rate constant for binding zinc that is 200-fold higher than those for tricine and CaEDTA. We find that synaptic zinc is phasically released during action potentials. In response to short trains of presynaptic stimulation, synaptic zinc diffuses beyond the synaptic cleft where it inhibits extrasynaptic NMDARs. During higher rates of presynaptic stimulation, released glutamate activates additional extrasynaptic NMDARs that are not reached by synaptically released zinc, but which are inhibited by ambient, tonic levels of nonsynaptic zinc. By performing a ratiometric evaluation of extracellular zinc levels in the dorsal cochlear nucleus, we determined the tonic zinc levels to be low nanomolar. These results demonstrate a physiological role for endogenous synaptic as well as tonic zinc in inhibiting extrasynaptic NMDARs and thereby fine tuning neuronal excitability and signaling. PMID:25947151

  20. Relative importance of food and water pathways in the bio-accumulation of zinc

    International Nuclear Information System (INIS)

    Renfro, W.C.; Fowler, S.W.; Heyraud, M.; LaRosa, J.

    1974-01-01

    The relative importance of the food versus water pathway as a source of radionuclides to aquatic organisms is studied through laboratory experiments allowing groups of animals to accumulate 65 Zn from the two pathways simultaneously in the same simulated ecosystem. Mean whole body concentration factors of 65 Zn and stable zinc in shrimp, crab, fish and mussels are recorded. In shrimp and fish accumulation of 65 Zn through the food pathway is reported more than the water pathway though fluctuations in food quality and feeding rates could alter zinc absorption kinetics

  1. Dietary Zinc Intake and Plasma Zinc Concentrations in Children with Short Stature and Failure to Thrive.

    Science.gov (United States)

    Yazbeck, Nadine; Hanna-Wakim, Rima; El Rafei, Rym; Barhoumi, Abir; Farra, Chantal; Daher, Rose T; Majdalani, Marianne

    2016-01-01

    The burden of zinc deficiency on children includes an increased incidence of diarrhea, failure to thrive (FTT) and short stature. The aim of this study was to assess whether children with FTT and/or short stature have lower dietary zinc intake and plasma zinc concentrations compared to controls. A case-control study conducted at the American University of Beirut Medical Center included 161 subjects from 1 to 10 years of age. Cases had a statistically significant lower energy intake (960.9 vs. 1,135.2 kcal for controls, p = 0.010), lower level of fat (30.3 vs. 36.5 g/day, p = 0.0043) and iron intake (7.4 vs. 9.1 mg/day, p = 0.034). There was no difference in zinc, copper, carbohydrate and protein intake between the 2 groups. The plasma zinc concentration did not differ between the cases and controls (97.4 vs. 98.2 μg/dl, p = 0.882). More cases had mild-to-moderate zinc deficiency when compared to controls with 10.3 vs. 3.6%, p = 0.095. Our study did not show statistically significant difference in dietary zinc intake and plasma zinc concentrations between children with FTT and/or short stature compared to healthy controls. A prospective study is planned to assess the effect of zinc supplementation on growth parameters in FTT children. © 2016 S. Karger AG, Basel.

  2. Associations between Dietary Iron and Zinc Intakes, and between Biochemical Iron and Zinc Status in Women

    Directory of Open Access Journals (Sweden)

    Karen Lim

    2015-04-01

    Full Text Available Iron and zinc are found in similar foods and absorption of both may be affected by food compounds, thus biochemical iron and zinc status may be related. This cross-sectional study aimed to: (1 describe dietary intakes and biochemical status of iron and zinc; (2 investigate associations between dietary iron and zinc intakes; and (3 investigate associations between biochemical iron and zinc status in a sample of premenopausal women aged 18–50 years who were recruited in Melbourne and Sydney, Australia. Usual dietary intakes were assessed using a 154-item food frequency questionnaire (n = 379. Iron status was assessed using serum ferritin and hemoglobin, zinc status using serum zinc (standardized to 08:00 collection, and presence of infection/inflammation using C-reactive protein (n = 326. Associations were explored using multiple regression and logistic regression. Mean (SD iron and zinc intakes were 10.5 (3.5 mg/day and 9.3 (3.8 mg/day, respectively. Median (interquartile range serum ferritin was 22 (12–38 μg/L and mean serum zinc concentrations (SD were 12.6 (1.7 μmol/L in fasting samples and 11.8 (2.0 μmol/L in nonfasting samples. For each 1 mg/day increase in dietary iron intake, zinc intake increased by 0.4 mg/day. Each 1 μmol/L increase in serum zinc corresponded to a 6% increase in serum ferritin, however women with low serum zinc concentration (AM fasting < 10.7 μmol/L; AM nonfasting < 10.1 μmol/L were not at increased risk of depleted iron stores (serum ferritin <15 μg/L; p = 0.340. Positive associations were observed between dietary iron and zinc intakes, and between iron and zinc status, however interpreting serum ferritin concentrations was not a useful proxy for estimating the likelihood of low serum zinc concentrations and women with depleted iron stores were not at increased risk of impaired zinc status in this cohort.

  3. Leptin, NPY, Melatonin and Zinc Levels in Experimental Hypothyroidism and Hyperthyroidism: The Relation to Zinc.

    Science.gov (United States)

    Baltaci, Abdulkerim Kasım; Mogulkoc, Rasim

    2017-06-01

    Since zinc mediates the effects of many hormones or is found in the structure of numerous hormone receptors, zinc deficiency leads to various functional impairments in the hormone balance. And also thyroid hormones have important activity on metabolism and feeding. NPY and leptin are affective on food intake and regulation of appetite. The present study is conducted to determine how zinc supplementation and deficiency affect thyroid hormones (free and total T3 and T4), melatonin, leptin, and NPY levels in thyroid dysfunction in rats. The experiment groups in the study were formed as follows: Control (C); Hypothyroidism (PTU); Hypothyroidism+Zinc (PTU+Zn); Hypothyroidism+Zinc deficient; Hyperthyroidism (H); Hyperthyroidism+Zinc (H+Zn); and Hyperthyroidism+Zinc deficient. Thyroid hormone parameters (FT 3 , FT 4 , TT 3 , and TT 4 ) were found to be reduced in hypothyroidism groups and elevated in the hyperthyroidism groups. Melatonin values increased in hyperthyroidism and decreased in hypothyroidism. Leptin and NPY levels both increased in hypo- and hyperthyroidism. Zinc levels, on the other hand, decreased in hypothyroidism and increased in hyperthyroidism. Zinc supplementation, particularly when thyroid function is impaired, has been demonstrated to markedly prevent these changes.

  4. Availability of native and fertilizer zinc in some Indian soils: studies with 65Zinc

    International Nuclear Information System (INIS)

    Chaudhury, J.; Deb, D.L.

    1979-01-01

    Isotopically exchangeable zinc (Et values) was determined by different methods in some soils having pH(H 2 O) varying from 3.05 to 8.40 using 65 Zn. The Et values obtained using different extractants showed significant correlation with available zinc, organic carbon and soil pH. The recovery of applied zinc in the aqueous phase was less than one percent in most of the soils having pH higher than 7.0. Application of zinc with complexing agents like DTPA and EDTA increased the recovery of applied zinc in the solution to about 95 percent. Soil pH, organic C and DTPA extractable zinc showed significant relationship with the recovery of applied zinc under different treatments. Use of EDTA and DTPA extractants reduced the zinc buffering capacity of soil to a value less than one, irrespective of the initial pH of the soil, whereas the values were comparatively higher in presence of different levels of zinc carrier. (auth.)

  5. DIABETES MELLITUS COMO FACTOR DE RIESGO DE DEMENCIA EN LA POBLACIÓN ADULTA MAYOR MEXICANA

    Science.gov (United States)

    Silvia, Mejía-Arango; Clemente, y Zúñiga-Gil

    2012-01-01

    Introduccion La diabetes mellitus y las demencias constituyen dos problemas crecientes de salud entre la población adulta mayor del mundo y en particular de los paises en desarrollo. Hacen falta estudios longitudinales sobre el papel de la diabetes como factor de riesgo para demencia. Objetivo Determinar el riesgo de demencia en sujetos Mexicanos con diabetes mellitus tipo 2. Materiales y Metodos Los sujetos diabéticos libres de demencia pertenecientes al Estudio Nacional de Salud y Envejecimiento en México fueron evaluados a los dos años de la línea de base. Se estudió el papel de los factores sociodemográficos, de otras comorbilidades y del tipo de tratamiento en la conversión a demencia. Resultados Durante la línea de base 749 sujetos (13.8%) tuvieron diabetes. El riesgo de desarrollar demencia en estos individuos fue el doble (RR, 2.08 IC 95%, 1.59–2.73). Se encontró un riesgo mayor en individuos de 80 años y más (RR 2.44 IC 95%, 1.46–4.08), en los hombres (RR, 2.25 IC 95%, 1.46–3.49) y en sujetos con nivel educativo menor de 7 años. El estar bajo tratamiento con insulina incrementó el riesgo de demencia (RR, 2.83, IC 95%, 1.58–5.06). Las otras comorbilidades que aumentaron el riesgo de demencia en los pacientes diabéticos fueron la hipertensión (RR, 2.75, IC 95%, 1.86–4.06) y la depresión (RR, 3.78, 95% IC 2.37–6.04). Conclusión Los sujetos con diabetes mellitus tienen un riesgo mayor de desarrollar demencia, La baja escolaridad y otras comorbilidades altamente prevalentes en la población Mexicana contribuyen a la asociación diabetes-demencia. PMID:21948010

  6. The protective nature of passivation films on zinc: surface charge

    International Nuclear Information System (INIS)

    Muster, Tim H.; Cole, Ivan S.

    2004-01-01

    The influence of oxide surface charge on the corrosion performance of zinc metals was investigated. Oxidised zinc species (zinc oxide, zinc hydroxychloride, zinc hydroxysulfate and zinc hydroxycarbonate) with chemical compositions similar to those produced on zinc during atmospheric corrosion were formed as particles from aqueous solution, and as passive films deposited onto zinc powder, and rolled zinc, surfaces. Synthesized oxides were characterised by X-ray diffraction, Fourier transform infrared spectroscopy, scanning electron microscopy and electron probe X-ray microanalysis. The zeta potentials of various oxide particles, as determined by microelectrophoresis, are reported as a function of pH. Particulates containing a majority of zinc hydroxycarbonate and zinc hydroxysulfate crystallites were found to possess a negative surface charge below pH 6, whilst zinc oxide-hydroxide and zinc hydroxychloride crystallites possessed isoelectric points (IEP's) higher than pH 8. The ability of chloride species to pass through a bed of 3 μm diameter zinc powder was found to increase for surfaces possessing carboxy and sulfate surface species, suggesting that negatively charged surfaces can aid in the repulsion of chloride ions. Electrochemical analysis of the open-circuit potential as a function of time at a fixed pH of 6.5 showed that the chemical composition of passive films on zinc plates influenced the ability of chloride ions to access anodic sites for periods of approximately 1 h

  7. Zinc-induced protection against cadmium

    Energy Technology Data Exchange (ETDEWEB)

    Early, J.L.; Schnell, R.C.

    1978-02-01

    Pretreatment of male rats with cadmium acetate potentiates the duration of hexobarbital hypnosis and inhibits the rate of hepatic microsomal drug metabolism. Pretreatment of rats with zinc acetate protects against these alterations in drug action elicited by cadmium.

  8. Anaerobic Digestion Alters Copper and Zinc Speciation.

    Science.gov (United States)

    Legros, Samuel; Levard, Clément; Marcato-Romain, Claire-Emmanuelle; Guiresse, Maritxu; Doelsch, Emmanuel

    2017-09-19

    Anaerobic digestion is a widely used organic waste treatment process. However, little is known on how it could alter the speciation of contaminants in organic waste. This study was focused on determining the influence of anaerobic digestion on the speciation of copper and zinc, two metals that generally occur at high concentration in organic waste. Copper and zinc speciation was investigated by X-ray absorption spectroscopy in four different raw organic wastes (predigestion) and their digested counterparts (postdigestion, i.e., digestates). The results highlighted an increase in the digestates of the proportion of amorphous or nanostructured copper sulfides as well as amorphous or nanostructured zinc sulfides and zinc phosphate as compared to raw waste. We therefore suggest that the environmental fate of these elements would be different when spreading either digestates or raw waste on cropland.

  9. Sorption of zinc on human teeth

    International Nuclear Information System (INIS)

    Helal, A.; Amin, H.; Alian, G.

    1997-01-01

    Zinc containing dental amalgams are sometimes used as fillings by dentists. The freshly mixed mass of the amalgam alloy and liquid mercury packed or condensed into a prepared tooth cavity. Zinc has been included in amalgams alloys up to 2% as an aid in manufacturing by helping to produce clean sound castings of the ingots. Although such restorations have a relatively long service life, they are subject to corrosion and galvanic action, thus releasing metallic products into the oral environment. The aim of this paper is to investigate the uptake (sorption) of Zinc ionic species on human teeth using the radioactive tracer technique. For this purpose the isotope Zn-65 produced from pile-irradiation of zinc metal was used. The various liquids studied were drinking water (tap water), tea, coffee, red tea and chicken soup. Sorption was studied through immersion of a single human tooth (extracted) in each of these liquids

  10. Ameliorative effects of selenium and zinc

    African Journals Online (AJOL)

    Methidathion-induced hematological, biochemical and hepatohistological alterations in rat: Ameliorative effects of selenium and zinc. L Barkat, A Boumendjel, C Abdennour, MS Boulakoud, A El Feki, M Messarah ...

  11. Relationship between Zinc Levels and Anthropometric Indices ...

    African Journals Online (AJOL)

    2018-01-24

    Jan 24, 2018 ... Keywords: Anthropometric indices, female children, serum zinc, sickle cell anemia. Relationship ... with SCA have reduced weight, height, and BMI when compared with their .... to low self‑esteem and depression. There is ...

  12. Corrosion inhibition by lithium zinc phosphate pigment

    International Nuclear Information System (INIS)

    Alibakhshi, E.; Ghasemi, E.; Mahdavian, M.

    2013-01-01

    Highlights: •Synthesis of lithium zinc phosphate (LZP) by chemical co-precipitation method. •Corrosion inhibition activity of pigments compare with zinc phosphate (ZP). •LZP showed superior corrosion inhibition effect in EIS measurements. •Evaluation of adhesion strength and dispersion stability. -- Abstract: Lithium zinc phosphate (LZP) has been synthesized through a co-precipitation process and characterized by XRD and IR spectroscopy. The inhibitive performances of this pigment for corrosion of mild steel have been discussed in comparison with the zinc phosphate (ZP) in the pigment extract solution by means of EIS and in the epoxy coating by means of salt spray. The EIS and salt spray results revealed the superior corrosion inhibitive effect of LZP compared to ZP. Moreover, adhesion strength and dispersion stability of the pigmented epoxy coating showed the advantage of LZP compared to ZP

  13. Aportaciones de las personas mayores a la sociedad: Análisis sociológico

    Directory of Open Access Journals (Sweden)

    Mª TERESA BAZO

    1996-01-01

    Full Text Available En el artículo se exponen algunos resultados de una investigación sobre actividad en la vejez y contribuciones de las personas jubiladas a la sociedad, realizada por la autora con una muestra de más de 60 personas, la mayor parte jubiladas y otras expertas en distintas áreas, residentes en el País Vasco, Navarra, Barcelona, Madrid y Zaragoza. se ha utilizado la entrevista en profundidad semiestructurada y la entrevista de grupo. los resultados expuestos son relativos, sobre todo, a las actividades altruistas de las personas jubiladas, asi como algunas contribuciones al bienestar económico de la sociedad. una conclusión es que las nuevas personas jubiladas solo necesitan oportunidades para desarrollar todo su potencial. el resto lo ponen ellas.

  14. La caza mayor y le economía rural en la provincia de Toledo

    Directory of Open Access Journals (Sweden)

    Martín Fernández, Ángel Julián

    2004-06-01

    Full Text Available Leisure or business? Is it the hunt a really profitable activity? If it is like that, who are the biggest beneficiaries? How it has influenced in the most disadvantaged rural zones? Here there are some of the questions about economic and social reality of hunting, and its answers are tried to be approached in this work, for a confirmed hunting tradition zone as «Los Montes de Toledo», in the province of the same name, where are placed the most of the best major hunting areas in the Toledo province. The Mounts of Toledo, due to its excellent natural resources for the hunting and to the crisis of the agrarian traditional utilizations, constitute an area where the major hunt is the most adapted use to contribute to the biological balance with a rational management.

    [es] ¿Ocio o negocio?, ¿es la caza una actividad verdaderamente rentable? Si es así, ¿quiénes son los mayores beneficiarios?, ¿cómo repercute en las zonas rurales más desfavorecidas? Estas son algunas de las cuestiones que la caza, como realidad económica y social, plantea, y cuyas respuestas se pretende abordar en este trabajo desarrollado en una zona de contrastada tradición cinegética como es la comarca de los Montes de Toledo en la provincia del mismo nombre, como lo demuestra el hecho de que la mayor parte de los cotos de caza mayor de la provincia de Toledo, se hallen en esta comarca. Los Montes de Toledo debido a sus excelentes recursos naturales para la caza y a la crisis de los aprovechamientos agrarios tradicionales, constituyen un espacio en el que la práctica de la caza mayor, es el uso más adecuado para contribuir a la conservación del equilibrio biológico, siempre que este aprovechamiento se realice racionalmente. [fr] Loisir ou affaire? Est-ce que la chasse est une activité vraiment rentable? Le cas échéant, qui sont leur principaux bénéficiaires?, quelles sont leur conséquences dans les espaces ruraux les plus défavorisés? Ce sont

  15. Actitud de Marcha según Nivel Socioeconómico en Adultos Mayores Autovalentes

    Directory of Open Access Journals (Sweden)

    Paul Medina González

    Full Text Available RESUMEN La marcha es fundamental para la funcionalidad de adultos mayores (AM, además su expresión actitudinal se relaciona con diferentes estados emocionales, los cuales son condicionados por el nivel socioeconómico (NSE. El propósito de esta investigación fue evaluar el comportamiento de atributos actitudinales de marcha según el NSE en AM autovalentes. Participaron este estudio 71 AM autovalentes de la comunidad de Talca-Chile, categorizados según el NSE a los cuales se les aplicó el instrumento denominado análisis de forma y esfuerzo de la marcha previo caracterización de confiabilidad. Los resultados indican que el estilo de marcha no es diferente según el NSE en AM autovalentes; sin embargo, los perfiles cualificados presentan variaciones en los anclajes las que son dependientes del género.

  16. Can Facebook help you become mayor? Case study: Bacãu, 2016

    Directory of Open Access Journals (Sweden)

    Monica Patrut

    2017-04-01

    Full Text Available Cleverly used in political communication, Facebook helps candidates to raise their visibility, to directly communicate with the citizens and involve them in creating virtual communities and content in order to virally promote political messages.In our study we briefly present the way in which Facebook was used, timidly at first, in the election campaign of Bacau from 2012 and 2016.The importance of the social media during the local elections in this city has slowly but surly increased. In 2012, the presence on Facebook was only an oportunity, much less exploited than television or newspapers. In 2016 all the candidates created their campaign online, some of them exclusively on this social network. However, the success of the 2.0 mayor is not based only on using the social network as (an alternative news channel, but rather on establishing a bidirectional link and a constant interaction with virtual friends.

  17. La educación sexual dirigida a personas mayores: retos, dificultades y propuestas

    OpenAIRE

    Ballester-Arnal, R.; Giménez-Ruiz, C.; Castro-Calvo, Jesús; Morell-Mengual, Vicente

    2016-01-01

    Introducción: La educación sexual ha sido concebida en un marco estrecho de prevención de enfermedad que pretendía evitar embarazos no deseados o infecciones de transmisión sexual en adolescentes y jóvenes. Sin embargo, la salud sexual es un concepto mucho más amplio. Entre las personas mayores de 60 años, los programas de educación sexual escasean a pesar de sus numerosos problemas sexuales. Método: Durante 17 años se ha impartido un módulo de Educación sexual dentro de la asignatura “Educac...

  18. Las condiciones de vida de las personas mayores y los servicios sociales municipales.

    Directory of Open Access Journals (Sweden)

    Enrique Fuentes Goyanes

    2012-01-01

    Full Text Available El estudio analiza las condiciones de vida de las personas mayores de un municipio mediano de la provincia de Tarragona con el objetivo de proponer algunas reestructuraciones en los servicios sociales y culturales y los modelos de intervención. Se han tenido en cuenta aspectos cuantitativos (demografía del municipio referente a la progresión de la edad de jubilación, sexo, nivel educativo, profesional y económico, inventario de recursos y dispositivos, usuarios de servicios y participación ciudadana, así como de carácter cualitativo (mediante grupos de discusión y entrevistas personalizadas a personas mayores y a técnicos y responsables municipales. Cada uno de los aspectos analizados se ha emmarcado en el contexto socioeconómico actual, en un momento en el que se están llevando a cabo múltiples reformas, sobre todo en los planes de jubilación públicos y privados, así como en diferentes ámbitos y niveles de la administración. También se han analizado las tendencias socioculturales de los nuevas personas mayores, describiendo los aspectos más relevantes de sus estilos de vida, teniendo en cuenta que son los protagonistas de la revolución cultural de los años sesenta. Ambas cuestiones son las que determinarán el tipo de recursos que habrá que desarrollar en el futuro y los apoyos que deberán recibir las personas mayores para promover su autonomía, mejorar su calidad de vida y sus compromisos con la actividad familiar y municipal.------------------------------------------------------------------The study analyses the living conditions of the old people of an average municipality of the province of Tarragona with the aim to propose some restructurings in the social and cultural services and the models of intervention. They have been taken into account quantitative aspects (demography of the municipality referent to the progression of the age of retirement, sex, educational level, professional and economic, inventory of

  19. RELACIÓN MÉDICO-PACIENTE: DERECHOS DEL ADULTO MAYOR

    OpenAIRE

    Barrantes-Monge,Melba; Rodríguez,Eduardo; Lama,Alexis

    2009-01-01

    Existen prejuicios en relación con la vejez, incluso entre los profesionales que se dedican a la gerontología. Uno común y peligroso es considerar que los viejos son todos enfermos o discapacitados. La relación médico-paciente es la piedra angular de la práctica y ética médicas. Para alcanzar el respeto por los adultos mayores es necesaria una medicina prudente, basada en una práctica en la cual la reflexión ética y clínica pueda contribuir. Esto último es posible si se hacen valer los derech...

  20. Empathy in Students of Specialty in Physical Therapy, Universidad Mayor in Temuco, Chile

    Directory of Open Access Journals (Sweden)

    Víctor Patricio Díaz-Narváez

    2015-09-01

    Full Text Available Objective: To estimate empathy levels and describe the behavior of the structure of the empathy construct in kinesiology students at the Universidad Mayor in Temuco (Chile. Material and Methods: The Jefferson Scale of Medical Empathy, in its Spanish version for students (S Version, culturally validated for kinesiology students was applied. Cronbach's alpha and Tukey’s activity was estimated, as well. The means of data were compared using ANOVA Bifactorial and Duncan test. Kaiser-Meyer-Olkin and Bartlett test were used. The components were estimated applying principal components of the factorial test with varimax rotation and eigenvalue 1. Results: The scale showed reliability, there are no differences in levels of empathy between courses and bet­ween genders. Conclusions: This results are different from results of other studies. Is not possible to explain the cause of the observed results.