New CMS types in Plantago lanceolata and their relatedness

NARCIS (Netherlands)

De Haan, A.A.; Mateman, A.C.; Van Dijk, P.J.; Van Damme, J.M.M.

1997-01-01

Mitochondrial variation in Plantago lanceolata was used to detect new CMS types. Directional reciprocal crosses were made between plants which differed in mtDNA restriction patterns. Differential segregation of male steriles in reciprocal crosses indicated that the parents differed in CMS type.

In Vitro antibacterial activity of rumex nervosus, plantago lanceolata ...

African Journals Online (AJOL)

The finding indicated that Rumex nervosus showed have the highest zone of inhibition (20mm) against the genus Salmonella followed by Plantago lanceolata with the zone of inhibition (16mm) against L. monocytogenes. On the other hand, Lepidium sativum and Solanum incanum did not have any antibacterial activity ...

Plantas Medicinales en el Parque Nacional los alerces, Chubut, Patagonia Argentina

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Carolina Toledo

2012-12-01

Full Text Available El objetivo de este estudio fue identificar las plantas con valor medicinal empleadas por los antiguos pobladores del Parque Nacional Los Alerces y relacionarlas con la riqueza específica de plantas medicinales presentes en el área. Se entrevistaron 16 pobladores asentados en la Reserva Nacional que tenían conocimiento de las plantas medicinales, más allá de que hicieran uso o no de las mismas. Las entrevistas fueron semiestructuradas, completadas de manera escrita e individual por el entrevistador. Las mismas incluían diez preguntas que recopilaban información respecto a las especies usadas como medicina, modo de preparación y aplicación, frecuencia de uso, localización de las plantas en el ámbito del área protegida, forma de obtención de las especies, y el modo de adquisición de los conocimientos respecto a las plantas. Los pobladores mencionaron el uso de 42 especies con valor medicinal, distribuidas en 24 familias, de las cuales las mejor representadas fueron Lamiaceae (21,4% y Asteraceae (14,2%. En cuanto al origen de las plantas medicinales citadas por los pobladores, el 58, 5% correspondió a especies exóticas. Los usos más frecuentes fueron para trastornos del sistema digestivo, seguido en orden decreciente y en menor proporción para tratar afecciones respiratorias, cardiovasculares y de la piel. Al comparar la riqueza total de especies medicinales presentes en el Parque y las registradas a partir de las entrevistas, se observa que se hace uso de un 28,6% de lo disponible en el área.Medicinal plants in The Alerces National Park, Chubut, Argentinean Patagonia. The aim of this study was to identify the medicinal plants used by the old residents in The Alerces National Park and to relate this information with medicinal species richness in the area. An interview was employed with 16 local people settled in the National Reserve who had knowledge of medicinal plants, past or not to make use of them. The interviews were semi

La literatura médica clásica y la arquitectura de las termas medicinales

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Gloria Mora

1992-01-01

Full Text Available En este artículo se analiza la relación entre la arquitectura de las termas medicinales, caracterizada por la presencia de la cámara denominada laconicum, y los tratamiemtos basados en las virtudes terapéuticas de las aguas minero-medicinales prescritos por la medicina experimental de origen griego. Para ello se han estudiado los textos clásicos referentes al tema, tanto el Tratado de Arquitectura de Vitruvio como los escritos sobre medicina de Celso, Galeno, Plinio y otros autores.This article analyses the relationship between the architecture of medicinal spas, such as those with a laconicum, and treatments based on the therapeutical vlrtues of medicinal mineral waters as prescribed by Greek doctors. The analysis is based on the study of classical texts on the subject, both the ten books on architecture by Vitruvius and the medicinal treatises of Celsus, Galenos, Pliny and other authors.

The morphology of hairs in species of Plantago L. sectio Oreades Decne

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Emilia Andrzejewska-Golec

2014-01-01

Full Text Available The hairs of three taxa of sectio Oreades Decne genus Plantago have been studied. We have found that hair typical for the majority of representatives of the genus Plantago, that is, with a unicellular stalk and head vertically divided into two cells, occur in these studied taxa. Some of the headless hairs occurring here are similar to those occurring in sectio Arnoglossum Decne. Rahn's (1978 suggestion of transferring sectio Oreades to the subgenus Psyllium seems wrong since the representatives of this section, in contrast to subgenus Psyllium, do not have hairs with the stalks consisting of several cells and unicellular heads, club-like hairs or iridoid-plantarenaloside. They contain, however, hairs with overlapping cells and iridoid-catapol, which is absent in the taxa of subgenus Psyllium.

MORPHOLOGICAL AND ANATOMICAL STUDY OF GRANULES WITH SEEDS EPIDERMIS OF PLANTAGO OVATA FORSSK

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J. V. Daironas

2017-01-01

Full Text Available The results of a morphological and anatomical study of granules from the epidermis of Plantago ovata seeds are presented in the article. Morphological and microscopic diagnostic signs are important for establishing the authenticity of medicinal plant material and drugs made from it.The aim is the identification of morphological and microscopic diagnostic characteristics of the seed epidermis of Plantago ovata, minimal and sufficient to establish the authenticity of the granular pieces of the plant’s epidermis.Materials and methods. The study of morphological and anatomical characteristics as well as histochemical study were conducted according to the procedures of the State Pharmacopoeia of the Russian Federation XIII edition. Microscope “Micromed-1” and digital camera MD300 Electronic Eyepiece (Jincheng were used. Photos were edited in Adobe Photoshop CS6.Results and discussion. Morphological signs of the epidermis of Plantago ovata seeds include its light yellow or pinkish-yellow color and a presence of a pigmented spot of pink or light brown color on the epidermis of the convex side of the seeds and along the seed. These signs are applicable for diagnosis and are also found in crushed raw materials. Granules are rough lumps, consisting of stuck together epidermis pieces. They are characterized by a yellowish or light brown color and the presence of a pigmented spot. The microscopic diagnostic signs include the structure of the upper and lower epidermis, the presence of cells with mucus and starch grains. The upper epidermis consists of large polygonal cells with straight thin anticlinal walls. The cells are covered with a smooth cuticle and are filled with mucus. The lower epidermis consists of elongated rectangular cells. Cells with mucus swell rapidly in the radial direction. Biometric characteristics of anatomical diagnostic signs were established.Conclusion. As the result of a morphological and anatomical study the diagnostic signs

NaCl salinity affects lateral root development in Plantago maritima

NARCIS (Netherlands)

Rubinigg, M; Wenisch, J; Elzenga, JTM; Stulen, [No Value

2004-01-01

Root growth and morphology were assessed weekly in hydroponically-grown seedlings of the halophyte Plantago maritima L. during exposure to 0, 50, 100 and 200 mM NaCl for 21 d. Relative growth rate was reduced by 25% at 200 mM NaCl. The lower NaCl treatments did not affect relative growth rates.

Evaluation of binding properties of Plantago psyllium seed mucilage.

Science.gov (United States)

Saeedi, Majid; Morteza-Semnani, Katayoun; Ansoroudi, Farshad; Fallah, Saeed; Amin, Gholamreza

2010-09-01

Mucilage extracted from Plantago psyllium seeds was evaluated for inertness and safety parameters. The suitability of psyllium mucilage for a pharmaceutical binder was assessed in paracetamol tablets. Properties of the granules prepared using different concentrations of psyllium mucilage was compared with PVP and tragacanth. Psyllium mucilage at 5 % (m/m) was found to be comparable with 3 % (m/m) of PVP. Investigated paracetamol tablets indicated that psyllium mucilage can retard the drug release.

Estudio de las plantas medicinales utilizadas por la comunidad indígena Camaritagua (Amazonas, Colombia

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Márylin Bejarano Castillo

2005-07-01

presenta (65%, es el bosque Sucesional, éste resultado promueve la posibilidad de hacer productivas estas áreas disminuyendo el uso del bosque Primario permitiendo así su conservación. El 46,5% de las especies encontradas en este estudio ya habían sido citadas por otros autores como medicinales, señalando hacia dónde deben conducirse las investigaciones fitoquímicas.

Profiling of antioxidant potential and phytoconstituents of Plantago coronopus

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C. G. Pereira

Full Text Available Abstract The halophyte species Plantago coronopus has several described ethnomedicinal uses, but few reported biological activities. This work carried out for the first time a comparative analysis of P. coronopus organs in terms of phenolic composition and antioxidant activity of organic and water extracts from roots, leaves and flowers. The leaves contents in selected nutrients, namely amino acids and minerals, are also described. Roots (ethyl acetate and methanol extracts had the highest radical scavenging activity (RSA towards 1,1-diphenyl-2-picrylhydrazyl (DPPH and 2,2’-azino-bis(3-ethylbenzothiazoline-6-sulfonic acid (ABTS radicals, while leaves (hexane extract had higher RSA on nitric oxide radical and iron chelating ability. High performance liquid chromatography (HPLC analysis identified eighteen phenolics from which salicylic acid and epicatechin are here firstly described in Plantago species. Leaves had mineral levels similar to those of most vegetables, proving to be a good source for elements like calcium, sodium, iron and magnesium, and also for several of the essential amino acids justifying it use as food. Our results, especially those regarding the phenolics composition, can explain the main traditional uses given to this plantain and, altogether, emphasize the potential of P. coronopus as a source of bioactive molecules particularly useful for the prevention of oxidative stress-related diseases.

Gender variation, partial male sterility and labile sex expression in gynodioecious Plantago coronopus

NARCIS (Netherlands)

Koelewijn, HP; VanDamme, JMM

Gynodioecy is a breeding system consisting of male steriles (MS, females) and hermaphrodites (H). There is however within such sq stems a third, often neglected, class of partially male sterile plants (PMS), i.e. plants with an intermediate sex expression. In natural populations of Plantago

Gender variation, partial male sterility and labile sex expression in gynodioecious Plantago coronopus

NARCIS (Netherlands)

Koelewijn, H.P.; Van Damme, J.M.M.

1996-01-01

Gynodioecy is a breeding system consisting of male steriles (MS, females) and hermaphrodites (H). There is however within such sq stems a third, often neglected, class of partially male sterile plants (PMS), i.e. plants with an intermediate sex expression. In natural populations of Plantago

Plantas medicinales :Conocimeinto aplicable a la educación de niños shuar en la comunidad de Pumpuis.

OpenAIRE

Naikiai, Rosa A.

2002-01-01

Introduction. Framework. Theoretical framework. Empirical framework. Medicinal plants applicable to diseases known by Shuar. Conclusions. Recommendations. Annexes. Bibliography. Introducción. Marco referencial. Marco teórico. Marco empírico. Plantas medicinales aplicables a las enfermedades conocidas por los shuar. Conclusiones. Recomendaciones. Anexos. Bibliografía.

Efficacy of Plantago major, chlorhexidine 0.12% and sodium bicarbonate 5% solution in the treatment of oral mucositis in cancer patients with solid tumour: A feasibility randomised triple-blind phase III clinical trial.

Science.gov (United States)

Cabrera-Jaime, Sandra; Martínez, Cristina; Ferro-García, Tarsila; Giner-Boya, Pilar; Icart-Isern, Teresa; Estrada-Masllorens, Joan M; Fernández-Ortega, Paz

2018-02-01

Oral mucositis is one of the most common adverse effects of chemotherapy and radiotherapy. The aim of this study was to compare the efficacy of Plantago major extract versus chlorhexidine 0.12% versus sodium bicarbonate 5% in the symptomatic treatment of chemotherapy-induced oral mucositis in solid tumour cancer patients. Multicentre randomised controlled trial estimated sample of 45 solid tumour patients with grade II-III mucositis. The participants were randomised to one of three treatments, consisting of sodium bicarbonate 5% aqueous solution together with: an additional dose of sodium bicarbonate 5% aqueous solution, Plantago major extract, or chlorhexidine 0.12%. The primary outcomes were severity of mucositis, pain intensity, oral intake capacity and quality of life. The independent variable was treatment group, and confounders included sociodemographic data, neutrophil count, chemotherapy drug and dose received. Of the 50 patients enrolled, 68% (n = 34) achieved grade 0 mucositis (none), with those using the double sodium bicarbonate rinse healing in five days on average (95% CI 3.9, 6.5) versus seven days (95% CI 5.3, 9,0) for the chlorhexidine group and seven days (95% CI 5.3, 8.5) for the Plantago major group. The pain experienced by the participants lessened over the 14 days of treatment, but differences in pain intensity between the three groups did not show statistical significance (p = 0.762). Healing time was shorter with the double sodium bicarbonate solution compared to the other two rinses, but the differences were not significant. Our results suggest it may be time to reconsider the use of Plantago major extract in the management of oral mucositis. Copyright © 2017 Elsevier Ltd. All rights reserved.

Plantago maxima leaves extract inhibits adipogenic action of a high-fat diet in female Wistar rats.

Science.gov (United States)

Tinkov, Alexey A; Nemereshina, Olga N; Popova, Elizaveta V; Polyakova, Valentina S; Gritsenko, Viktor A; Nikonorov, Alexandr A

2014-04-01

The primary objective of this study is to investigate the content of biologically active compounds producing an antioxidant effect in Plantago maxima and their influence on main mechanisms of dietary obesity development. Biologically active compounds in P. maxima were tested using paper chromatography. In in vivo experiment, high-fat-fed Wistar rats obtained P. maxima water extract for 3 months. Morphometric parameters, weight gain, serum adipokines, and cytokines, as well as oxidative stress biomarkers in rats’ tissues were evaluated. Gut microflora was also examined. Plantago maxima leaves used in the experiment contained significant amount of flavonoids, iridoids, phenol carboxylic acids, and tannins and ascorbic acid. Our in vivo experiment data demonstrate that P. maxima water extract prevents excessive adiposity in a diet-induced model. P. maxima consumption reduced serum leptin (twofold), macrophage chemoattractant protein-1 (sevenfold), tumornecrosis factor-α (25%), and interleukine-6 (26%) levels. P. maxima water extract decreased adipose tissue oxidative stress biomarkers in rats fed a high-fat diet. In addition, increased bacterial growth in the diet-induced obesity model was reversed by the P. maxima extract treatment. Plantago maxima water extract possessed antiadipogenic, antidiabetic, antiinflammatory, antioxidant activity, and normalized gut microflora in a rat model of diet-induced excessive adiposity due to a high content of biologically active compounds.

Micropropagation of Plantago camtschatica Link

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Emilia Andrzejewska-Golec

2011-01-01

Full Text Available The Far East medicinal plant - Plantago camtschatica was propagated in vitro from tips of shoots (obtained in vitro and from different explants of 4-week-old seedlings: seedling tips, hypocotyls, cotyledons, roots, first leaves. To our knowledge there is no information in literature about in vitro culture of this plantain. MS basal medium, supplemented with 0.6 pM IAA in combination with various cytokinins (BA, KIN, ZEA, was used. After 6 weeks of culture, micropropagation rate (MR - mean number of buds and shoots per explant - was calculated. Our study proved that P. camtschatica species was amenable to propagation in vitro from different kinds of explants. However, multiplication by adventitious shoot regeneration from hypocotyl explants was found to be the most suitable method for the propagation of this plant. Adventitious shoots could root without stimulation what allows to omit the stage of rooting. The plants obtained as a result of micropropagation were not phenotypically changed.

Uso tradicional de plantas medicinales con acción diurética en el Municipio de Quemado de Güines, Cuba

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Maykel Pérez Machín

2011-12-01

Full Text Available La flora de Cuba es muy rica en plantas medicinales, de las cuales se reportan aproximadamente 179 especies que la población utiliza para fines diuréticos, sin embargo, un gran número de ellas carece de validación experimental de su efecto farmacológico. El presente estudio se realizó con el propósito de documentar la importancia relativa de las especies medicinales más empleadas con fines diuréticos en el municipio de Quemado de Güines de la provincia de Villa Clara, Cuba. Se realizó un estudio etnobotánico en dos comunidades pertenecientes a ese municipio, para lo cual se realizó un muestreo a un total de 85 habitantes, y se aplicó aleatoriamente 80 encuestas a conocedores de plantas y 5 entrevistas entre yerberos y médicos practicantes de medicina tradicional, los cuales nos indicaron las plantas más utilizadas con estos fines en las comunidades estudiadas. La información etnofarmacológica fue registrada mediante la metodología TRAMIL y las especies de interés fueron identificadas y depositadas en el Herbario de la Universidad Central "Marta Abreu" de Las Villas. Los datos se analizaron mediante los índices cuantitativos de valor de uso para cada especie (IVU y el nivel de uso significativo (UST. Este indicador expresa que aquellos usos medicinales que son citados con una frecuencia superior o igual al 20%, por las personas encuestadas pueden considerarse significativos desde el punto de vista de su aceptación cultural y, por lo tanto, merecen su validación científica en Cuba. Se identificaron 26 especies medicinales agrupadas en 19 familias botánicas y se encontraron 10 plantas con un mayor nivel de uso significativo y un mayor IVU. El 53.8% de las plantas reportadas como diuréticas no se han validado experimentalmente en Cuba, el resto de las especies identificadas han sido estudiadas a nivel preclínico, pero aún no está autorizado su empleo como fitomedicamento.

Effect of different arbuscular mycorrhizal fungal isolates on growth and arsenic accumulation in Plantago lanceolata L

International Nuclear Information System (INIS)

Orłowska, Elżbieta; Godzik, Barbara; Turnau, Katarzyna

2012-01-01

The role of indigenous and non-indigenous arbuscular mycorrhizal fungi (AMF) on As uptake by Plantago lanceolata L. growing on substrate originating from mine waste rich in As was assessed in a pot experiment. P. lanceolata inoculated with AMF had higher shoot and root biomass and lower concentrations of As in roots than the non-inoculated plants. There were significant differences in As concentration and uptake between different AMF isolates. Inoculation with the indigenous isolate resulted in increased transfer of As from roots to shoots; AMF from non-polluted area apparently restricted plants from absorbing As to the tissue; and plants inoculated with an AMF isolate from Zn–Pb waste showed strong As retainment within the roots. Staining with dithizone indicated that AMF might be actively involved in As accumulation. The mycorrhizal colonization affected also the concentration of Cd and Zn in roots and Pb concentration, both in shoots and roots. - Highlights: ► The role of arbuscular mycorrhizal fungi (AMF) in As uptake was studied. ► Growth of Plantago lanceolata was significantly enhanced by mycorrhizal inoculation. ► Arsenic concentration and uptake significantly depended on the AMF isolate. ► Arbuscular mycorrhizal fungi may be useful for bioremediation of As contaminated wastes. - Effect of arbuscular mycorrhizal fungi on As uptake by Plantago lanceolata strongly depends on the origin of fungal isolates.

Empleo de plantas medicinales en usuarios de dos hospitales referenciales del Cusco, Perú Use of medicinal plants among people attending two reference hospitals in Cusco, Peru

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Gladys Oblitas

2013-03-01

Full Text Available Con el fin de determinar la frecuencia de empleo de plantas medicinales y describir las características de su uso en pacientes de dos hospitales referenciales de la ciudad de Cusco, se realizó un estudio transversal entre agosto y septiembre de 2011. Para el recojo de datos se construyó un instrumento, validado por juicio de expertos. El tamaño de la muestra fue de 250 personas seleccionadas no probabilísticamente. El 83,2 y 75,3% informaron haber empleado plantas medicinales alguna vez en su vida y en el último mes, respectivamente; además, el 85,7 señaló que desearía que su médico le recete plantas medicinales. Sus usos más frecuentes son para problemas digestivos (62,4%; urinarios (42,4%, y respiratorios (40,4%. Se concluye que el empleo de plantas medicinales se encuentra bastante difundido entre los usuarios de dos hospitales referenciales de la ciudad de Cusco. Los patrones de empleo revelan que los pacientes desean que los médicos del sistema de salud prescriban plantas medicinales en su acto médicoIn order to determine the frequency and characteristics of the use of medicinal plants in patients from two third-level hospitals in the city of Cusco, a cross-sectional study was conducted between August and September 2011. For data collection, an instrument was built and validated through experts’ judgment. The sample included 250 people selected in a non-probabilistic way. 83.2 and 75.3% informed having had used medicinal plants sometime during their lives and in the last month, respectively; additionally, 85.7 indicated that they wished their doctor would have prescribed them medicinal plants. Their most frequent uses include digestive problems (62.4% as well as urinary (42.4% and respiratory problems (40.4%. We conclude that the use of medicinal plants is widely spread among users of two hospitals in the city of Cusco. Utilization patterns show that patients wished the physicians of the health system prescribed medicinal

Uso tradicional de plantas medicinales en la vereda San Isidro, municipio de San José de Pare-Boyacá: un estudio preliminar usando técnicas cuantitativas

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Jarvis Yamith Toscano González

2006-07-01

Full Text Available Se evaluó cuantitativamente el uso de plantas medicinales con el propósito de documentar la importancia relativa de dichas especies y estimar el estado actual del conocimiento tradicional de las comunidades campesinas de la vereda San Isidro, municipio de San José de Pare, Boyacá. Esta zona en particular, se considera un sector agrícola de alta confluencia y denota una apropiación del conocimiento de sus pobladores en el uso y manejo de las especies vegetales de la región. Se aplicaron aleatoriamente 180 encuestas a personas entre los 20 y 80 años, en donde se investigó respecto al uso y manejo de las plantas. Se aplicaron entrevistas programadas a aquellas personas que manejan en gran parte la demanda de plantas medicinales en la región. Los datos obtenidos a partir del consenso de informantes, fueron analizados mediante el índice de valor de uso (IVU y el nivel de uso significativo de TRAMIL. Se registraron 84 especies con 78 géneros, agrupadas en 42 familias botánicas entre medicinales, aromáticas y mágico-religiosas; las familias mejor representadas fueron Lamiaceae, Asteraceae, Apiaceae, Solanaceae y Rutaceae. Se reportaron 10 especies con un mayor nivel de uso significativo y 25 especies con un mayor IVU. La documentación de los usos de las plantas medicinales en el área de influencia, revela que el conocimiento tradicional continúa profundamente arraigado entre la comunidad y se mantiene el saber popular a manos de curanderos y madres cabeza de familia.

Análise fitoquímica e avaliação da susceptibilidade antimicrobiana de diferentes tipos de extratos de Plantago major L. (Plantaginaceae

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Paulo Augusto Oliveira VENTURA

2016-03-01

Full Text Available Plantago major L. é uma planta oriunda do continente europeu, utilizada para fins medicinais. Apresenta atividade hematopoiética, atividade no tratamento de leucemias, carcinomas e contra vírus, bem como atividade antiparasitária, diurética, hepatoprotetora e anti-inflamatória. O presente trabalho avaliou o perfil fitoquímico dos extratos aquoso, etanólico e hidroalcoólico das folhas de Plantago major L., como também a ação antimicrobiana frente a bactérias Gram-positivas e Gram-negativas. Os resultados obtidos na análise fitoquímica demonstraram a presença de taninos, saponinas, alcaloides, flavonoides, terpenos e glicosídeos. A análise antimicrobiana mostrou que os extratos etanólico e hidroalcoólico de Plantago major L. possuem ação antimicrobiana frente ao Staphylococcus aureus, por meio da atuação de metabólitos bioativos com ação antimicrobiana, tais como taninos e flavonoides, o que torna Plantago major L. um possível candidato à obtenção de um novo fitoterápico.

Effect of Plantago australis leaves on different gastric ulcer models

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M.E. Bürger

Full Text Available The anti-ulcerogenic effect of the crude ethanolic extract (CEE of Plantago australis leaves was tested against ethanol-, indomethacin-, and cold restrain-induced stress ulcers. The CEE (500 and 1000 mg/kg reduced the lesion index (LI and the ulcer index in ethanol-induced ulcers, and the dose of 1000 mg/kg increased the amount of mucous. The highest dose of the CEE reduced the LI of cold restraint-induced stress ulcers when compared to the control group. The indomethacin-induced ulcers were not affected by this extract.

Isolation, characterization and investigation of Plantago ovata husk polysaccharide as superdisintegrant.

Science.gov (United States)

Pawar, Harshal; Varkhade, Chhaya

2014-08-01

Psyllium husk (Plantago ovata, Family: Plantaginaceae) contains a high proportion of hemicellulose, composed of a xylan backbone linked with arabinose, rhamnose, and galacturonic acid units (arabinoxylans). Polysaccharide was isolated from Psyllium husk using solvent precipitation method. The isolated polysaccharide was evaluated for various physicochemical parameters. The rheological behavior of polysaccharide (1% w/v in water) was studied using Brookfield viscometer. Polysaccharide derived from the husk of P. ovata was investigated as superdisintegrant in the fast dissolving tablets. Valsartan, an antihypertensive drug, was selected as a model drug. The tablets of Valsartan were prepared separately using different concentrations (1, 2.5, 5, 7.5% w/w) of isolated Plantago ovata (P. ovata) husk polysaccharide (Natural) and crospovidone as a synthetic superdisintegrant by direct compression method. The prepared tablets were evaluated for various pre-compression and post-compression parameters. The drug excipient interactions were characterized by FTIR studies. The formulation F4 containing7.5% polysaccharide showed rapid wetting time and disintegration time as compared to formulation prepared using synthetic superdisintegrant at the same concentration level. Hence batch F4 was considered as optimized formulation. The stability studies were performed on formulation F4. The disintegration time and in vitro drug release of the optimized formulation was compared with the marketed formulation (Conventional tablets). Copyright © 2014 Elsevier B.V. All rights reserved.

The morphology of hairs in species of Plantago L. Sections: Novorbis Decne and Mesembrynia Decne

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Emilia Andrzejewska-Golec

2014-01-01

Full Text Available This paper is a continuation of the investigation of hairs in representatives of various sections of the genus Plantago L.(Andrzejewska-Golec and Świętosławski 1987, 1988, 1989 a, b, 1991, in press 2. It deals with the species of the related sections: Novorbis Decne (3 species and Mesembrynia Decne (5 species. The investigated taxa of both sections have one type of headed hair (typical of the representatives of the genus Plantago as well as three types of headless hairs: 1 1-3-celled-bristle-shaped, 2 consisting of several cells, and 3 multicellular-web-like. Only slight differences between the hairs of the investigated taxa of sections Novorbis and Mesembrynia were noticed. The hairs of the representatives of these sections are also similar to the hairs of representatives of another section, related to those mentioned above, viz. Lamprosantha Decne (Andrzejewska-Golec and Świętosławski 1991.

Prácticas curativas y plantas medicinales: un acercamiento a la etnomedicina de San Nicolás, México

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María Cristina Chávez Mejía

2017-01-01

Full Text Available Existe interés por las prácticas curativas de la medicina tradicional como forma de curación/ sanación alterna y complementaria. El objetivo del artículo es documentar las prácticas curativas y las plantas medicinales que actualmente se utilizan en una comunidad rural del Estado de México. Desde la etnomedicina, se abordan las explicaciones cognitivas de los sujetos que participan del binomio salud-enfermedad. Se utilizó el método etnográfico para obtener y sistematizar información sobre las percepciones acerca de las prácticas curativas y plantas medicinales. Las prácticas son el resultado del conocimiento acumulado sobre el ambiente y se llevan a cabo por el interés de ayudar, más que por beneficio económico. Se concluye que la herbolaria es un indicativo de: 1 la pervivencia de la cosmovisión mesoamericana para tratar enfermedades de cuerpo y espíritu; 2 se privilegia una atención integral del paciente y 3 el ambiente físico que rodea a las personas es un botiquín bio-cultural.

Rapid Development of Microsatellite Markers for Plantago ovata Forsk.: Using Next Generation Sequencing and Their Cross-Species Transferability

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Ranbir Singh Fougat

2014-06-01

Full Text Available Isabgol (Plantago ovata Forsk. is an important medicinal plant having high pharmacological activity in its seed husk, which is substantially used in the food, beverages and packaging industries. Nevertheless, isabgol lags behind in research, particularly for genomic resources, like molecular markers, genetic maps, etc. Presently, molecular markers can be easily developed through next generation sequencing technologies, more efficiently, cost effectively and in less time than ever before. This study was framed keeping in view the need to develop molecular markers for this economically important crop by employing a microsatellite enrichment protocol using a next generation sequencing platform (ion torrent PGM™ to obtain simple sequence repeats (SSRs for Plantago ovata for the very first time. A total of 3447 contigs were assembled, which contained 249 SSRs. Thirty seven loci were randomly selected for primer development; of which, 30 loci were successfully amplified. The developed microsatellite markers showed the amplification of the expected size and cross-amplification in another six species of Plantago. The SSR markers were unable to show polymorphism within P. ovata, suggesting that low variability exists within genotypes of P. ovata. This study suggests that PGM™ sequencing is a rapid and cost-effective tool for developing SSR markers for non-model species, and the markers so-observed could be useful in the molecular breeding of P. ovata.

Population dynamics of the species Plantago major L. and Poa annua L. in a replacement series experiment

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Mijović A.

2009-01-01

Full Text Available Population dynamics of the species Plantago major L. and Poa annua L., typical representatives of ruderal vegetation, was analyzed in a replacement series experiment. The analyzed species were sown in an area with meadow vegetation, where the vegetation present had been previously removed by a total herbicide and additionally by hoeing. The objective of the experiment was to monitor growth dynamics and the effect of intra- and inter-specific interaction of the species Plantago major and Poa annua in conditions of different sowing densities and proportions. The effects of intra- and inter-specific interference and the density-dependent responses were assessed on the basis of several parameters (natality, mortality, age structure, and measures of ontogenetic changes. Based on the study results, it can be concluded that the responses of the species in the experiment were different, which is explained by different adaptive mechanisms, i.e., strategies, in the specific environmental conditions. An effect of the density dependent response was present in both species in the replacement series experiment. The response was amplified by water deficit caused by intensive evapora­tion of the bare soil. No effect of inter-specific interference was observed at the given densities of the study species on the sample plots. An effect of intra-specific interference of the species Plantago major and Poa annua was observed in the guise of a density-negative response of the rate of ontogenetic changes and fecundity.

Assessing urban habitat quality based on specific leaf area and stomatal characteristics of Plantago lanceolata L

International Nuclear Information System (INIS)

Kardel, F.; Wuyts, K.; Babanezhad, M.; Vitharana, U.W.A.; Wuytack, T.; Potters, G.; Samson, R.

2010-01-01

This study has evaluated urban habitat quality by studying specific leaf area (SLA) and stomatal characteristics of the common herb Plantago lanceolata L. SLA and stomatal density, pore surface and resistance were measured at 169 locations in the city of Gent (Belgium), distributed over four land use classes, i.e., sub-urban green, urban green, urban and industry. SLA and stomatal density significantly increased from sub-urban green towards more urbanised land use classes, while the reverse was observed for stomatal pore surface. Stomatal resistance increased in the urban and industrial land use class in comparison with the (sub-) urban green, but differences between land use classes were less pronounced. Spatial distribution maps for these leaf characteristics showed a high spatial variation, related to differences in habitat quality within the city. Hence, stomatal density and stomatal pore surface are assumed to be potentially good bio-indicators for urban habitat quality. - Stomatal characteristics of Plantago lanceolata can be used for biomonitoring of urban habitat quality.

PIXE analysis of trace elements in relation to chlorophyll concentration in Plantago ovata Forsk

International Nuclear Information System (INIS)

Saha, Priyanka; Sen Raychaudhuri, Sarmistha; Chakraborty, Anindita; Sudarshan, Mathummal

2010-01-01

Plantago ovata Forsk - an economically important medicinal plant - was analyzed for trace elements and chlorophyll in a study of the effects of gamma radiation on physiological responses of the seedlings. Proton-induced X-ray emission (PIXE) technique was used to quantify trace elements in unirradiated and gamma-irradiated plants at the seedling stage. The experiments revealed radiation-induced changes in the trace element and chlorophyll concentrations.

Estudio etnobotánico de las plantas medicinales de San José de Suaita, Suaita (Santander, Colombia)

OpenAIRE

Édgar Moreno Castillo; Édgar Leonardo Linares Castillo

2005-01-01

Se presenta un inventario de las especies vegetales utilizadas con fines medicinales, los componentes culturales en torno al uso medicinal de las plantas registradas y una aproximación al conocimiento de la transmisión de saberes entre generaciones; realizados entre mayo y octubre de 2004 en la Inspección de Policía de San José de Suaita, ubicada en el municipio de Suaita, departamento de Santander, Colombia entre 1.100 y 1.700 m de altitud. Como resultados se registró información para 118...

Estudio etnobotánico de las plantas medicinales de san josé de suaita, suaita (santander, colombia)

OpenAIRE

Moreno Castillo, Édgar; Linares Castillo, Édgar Leonardo

2011-01-01

Se presenta un inventario de las especies vegetales utilizadas con fines medicinales, los componentes culturales en torno al uso medicinal de las plantas registradas y una aproximación al
conocimiento de la transmisión de saberes entre generaciones; realizados entre mayo y octubre de 2004 en la Inspección de Policía de San José de Suaita, ubicada en el municipio de Suaita, departamento de Santander, Colombia entre 1.100 y 1.700 m de altitud. Como resultados se registró información ...

Effects of Salt Stress on Three Ecologically Distinct Plantago Species.

Science.gov (United States)

Al Hassan, Mohamad; Pacurar, Andrea; López-Gresa, María P; Donat-Torres, María P; Llinares, Josep V; Boscaiu, Monica; Vicente, Oscar

2016-01-01

Comparative studies on the responses to salt stress of taxonomically related taxa should help to elucidate relevant mechanisms of stress tolerance in plants. We have applied this strategy to three Plantago species adapted to different natural habitats, P. crassifolia and P. coronopus-both halophytes-and P. major, considered as salt-sensitive since it is never found in natural saline habitats. Growth inhibition measurements in controlled salt treatments indicated, however, that P. major is quite resistant to salt stress, although less than its halophytic congeners. The contents of monovalent ions and specific osmolytes were determined in plant leaves after four-week salt treatments. Salt-treated plants of the three taxa accumulated Na+ and Cl- in response to increasing external NaCl concentrations, to a lesser extent in P. major than in the halophytes; the latter species also showed higher ion contents in the non-stressed plants. In the halophytes, K+ concentration decreased at moderate salinity levels, to increase again under high salt conditions, whereas in P. major K+ contents were reduced only above 400 mM NaCl. Sorbitol contents augmented in all plants, roughly in parallel with increasing salinity, but the relative increments and the absolute values reached did not differ much in the three taxa. On the contrary, a strong (relative) accumulation of proline in response to high salt concentrations (600-800 mM NaCl) was observed in the halophytes, but not in P. major. These results indicate that the responses to salt stress triggered specifically in the halophytes, and therefore the most relevant for tolerance in the genus Plantago are: a higher efficiency in the transport of toxic ions to the leaves, the capacity to use inorganic ions as osmotica, even under low salinity conditions, and the activation, in response to very high salt concentrations, of proline accumulation and K+ transport to the leaves of the plants.

Taxonomic and geographic novelties in the genus Plantago (Plantaginaceae) in Chile, including the description of a new species

DEFF Research Database (Denmark)

Hassemer, Gustavo; Shipunov, Alexey; Rønsted, Nina

2018-01-01

We present taxonomic and geographic novelties in the genus Plantago from Chile. More specifically, we describe P. nebularis, a new species endemic to Cerro Moreno, Antofagasta region, and propose P. zoellneriana, a new name for P. sericea subsp. araucana. We also lectotypify the name P. sericea, ...

Avaliação do potencial citotóxico e genotóxico de Plantago major L. em sistemas teste in vivo Evaluation of the cytotoxic and genotoxic potential of Plantago major L. in test systems in vivo

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A.C. Luz

2012-01-01

Full Text Available A infusão das folhas de Plantago major (Plantaginaceae, conhecida como tansagem ou transagem, é usada como antibiótica, antiinflamatória, anti-séptica, anti-térmica, na prevenção de tumores e no tratamento de neoplasias. Este efeito é atribuído aos flavonóides encontrados em diversas espécies do gênero Plantago. O presente estudo objetivou avaliar os potenciais efeitos, tóxico e mutagênico, do extrato bruto hidroalcoólico de folhas de P. major, por meio dos testes in vivo de Allium cepa e do micronúcleo. Para o ensaio biológico vegetal, meristemas de raízes de A. cepa foram usados para o preparo de lâminas através da técnica de esmagamento. No ensaio do micronúcleo foram analisadas lâminas de células de medula óssea de roedores. As análises estatísticas seguiram o teste de Tukey (pThe infusion of leaves of Plantago major (Plantaginaceae, known as "tansagem" or "transagem", is used as antibiotic, anti-inflammatory, anti-septic, anti-thermal in the prevention of tumors and in the treatment of neoplasms. This effect is attributed to the flavonoids found in diverse species of the genus Plantago. The present study aimed to evaluate the potential toxic and mutagenic effects of the crude hydroalcoholic extract from P. major leaves by means of in vivo tests with Allium cepa and micronucleus. For the plant biological assay, meristems of A. cepa roots were used for the preparation of slides by adopting the crushing technique. In the micronucleus assay, slides of bone marrow cells from rodents were analyzed. Statistical analyses were carried out according to Tukey's test (ρ<0.05 for the Allium cepa assay and Scott-Knott test (ρ<0.05 for the micronucleus assay. Results of the A. cepa test demonstrate that there was a significant reduction in the germination index at all tested concentrations. P. major causes alteration in the cell cycle by inhibiting the division of cells, as indicated by the mitotic index. The indexes of

Fracciones de plantas medicinales vendidas en las plazas de mercado de Bogotá, Colombia

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Laura Isabel Mesa Castellanos

2006-01-01

que procure su correcto empleo y efectividad, y lo más importante, a evitar riesgos en la salud de los consumidores. Para comenzar se realizaron entrevistas semiestructuradas en siete plazas de la ciudad, en las que se logro establecer: usos tradicionales, origen, demanda, vía de administración y preparación de las plantas medicinales. Se determinaron 26 especies pertenecientes a 22 familias botánicas, para las que se hallaron índices que informan acerca de su valor cultural. Solo tres especies se encuentran aprobadas por el INVIMA, y para algunas de las otras especies no existe referencia acerca de su valor medicinal. El 78,57% de las especies es de origen silvestre, por lo que es prioritario establecer estrategias para su conservación.

Differences in glycosyltransferase family 61 accompany variation in seed coat mucilage composition in Plantago spp.

Science.gov (United States)

Phan, Jana L.; Tucker, Matthew R.; Khor, Shi Fang; Shirley, Neil; Lahnstein, Jelle; Beahan, Cherie; Bacic, Antony; Burton, Rachel A.

2016-01-01

Xylans are the most abundant non-cellulosic polysaccharide found in plant cell walls. A diverse range of xylan structures influence tissue function during growth and development. Despite the abundance of xylans in nature, details of the genes and biochemical pathways controlling their biosynthesis are lacking. In this study we have utilized natural variation within the Plantago genus to examine variation in heteroxylan composition and structure in seed coat mucilage. Compositional assays were combined with analysis of the glycosyltransferase family 61 (GT61) family during seed coat development, with the aim of identifying GT61 sequences participating in xylan backbone substitution. The results reveal natural variation in heteroxylan content and structure, particularly in P. ovata and P. cunninghamii, species which show a similar amount of heteroxylan but different backbone substitution profiles. Analysis of the GT61 family identified specific sequences co-expressed with IRREGULAR XYLEM 10 genes, which encode putative xylan synthases, revealing a close temporal association between xylan synthesis and substitution. Moreover, in P. ovata, several abundant GT61 sequences appear to lack orthologues in P. cunninghamii. Our results indicate that natural variation in Plantago species can be exploited to reveal novel details of seed coat development and polysaccharide biosynthetic pathways. PMID:27856710

INVESTIGACIONES ETNOBOTÁNICAS, FITOQUÍMICAS, ANTIOXIDANTES Y PRECLÍNICAS EN CINCO PLANTAS MEDICINALES QUE SE CONSUMEN COMO ANTIDIABÉTICAS EN MACHALA, PROVINCIA DE EL ORO, ECUADOR | ETHNOBOTANICAL, PHYTOCHEMICAL, ANTIOXIDANT AND PRECLINICAL INVESTIGATIONS IN FIVE MEDICINAL PLANTS CONSUMED AS ANTIDIABETICS IN MACHALA, EL ORO PROVINCE, ECUADOR

OpenAIRE

Keyla Moreno Maldonado; Carmita Jaramillo Jaramillo; Mayra Moreira; Simón Gaston García; Luisa Rojas de Astudillo

2016-01-01

La diabetes representa un grave problema de salud pública a nivel mundial. En Ecuador la diabetes ocupa uno de los primeros lugares como causa de fallecimientos. La comunidad hace uso de las plantas medicinales para tratar la diabetes, pero sin ninguna comprobación científica. Los datos acerca de las plantas usadas como antidiabéticas fueron recolectados mediante encuestas a expendedores y consumidores en mercados de venta de plantas medicinales y a la comunidad de Machala, Provincia El Oro, ...

Citotoxicidad de extractos de plantas medicinales sobre la línea celular de carcinoma de pulmón humano A549

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Alexis Díaz García

2011-03-01

Full Text Available OBJETIVO: evaluar el efecto de 10 extractos de plantas medicinales sobre el crecimiento de la línea celular humana de carcinoma de pulmón A549. METODOS: el efecto de los extractos sobre la células tumorales se midió a través de un ensayo colorimétrico mediante el empleo del bromuro de 3-(4,5-dimetil-tiazol-2-yl-2,5-difenil tetrazolio a concentraciones entre 3,9-250 µg/mL durante 72 h y se calculó la concentración citotóxica media para cada uno. RESULTADOS: del total de los extractos evaluados solo cuatro (Parthenium hysterophorus, Bixa orellana, Momordica charantia y Cucurbita maxima evidenciaron concentraciones citotóxicas medias inferiores a 100 µg/mL. Excepto Parthenium hysterophorus, las restantes se emplean en la medicina tradicional para el tratamiento del cáncer. Los extractos de Cecropia peltata, Melia azedarach, Annona glabra, Artemisia absintium, Lepidium virginicum y Bidens pilosa no mostraron efectos citotóxicos significativos. CONCLUSIONES: Los extractos de plantas que se emplean en la medicina tradicional para el tratamiento del cáncer, mostraron citotoxicidad sobre las células tumorales. El conocimiento etnobotánico representa una herramienta importante en la selección de plantas medicinales, en la búsqueda de nuevos compuestos para el tratamiento del cáncer.

Plan estratégico de mercadeo para el fomento de la producción de plantas medicinales y aromáticas de Asoplames (Nuevo Colón, Boyacá

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Nope Claudia

2008-04-01

Full Text Available

El plan estratégico de mercadeo para el fomento de la producción de plantas medicinales y aromáticas de Asoplames, Asociación de Productores de Plantas Medicinales y Aromáticas (PMyA, con sede en el municipio de Nuevo Colón, es una herramienta que reúne las condiciones necesarias para mejorar la comercialización de los productos de la asociación en los contextos regional, nacional e internacional. La estructuración del plan se inició con la realización de un diagnóstico interno-externo de Asoplames, mediante el diseño de una matriz DOFA. La información acopiada sirvió de base para definir la misión, la visión y el plan de acción como componentes fundamentales del plan estratégico de mercadeo.

Las plantas medicinales: principal alternativa para el cuidado de la salud, en la población rural de Babahoyo, Ecuador

OpenAIRE

Gallegos Zurita, Maritza

2016-01-01

Introducción. El uso terapéutico de plantas medicinales, como sustitutas de las medicinas farmacéuticas, se aplica desde la antigüedad para curar o aliviar las enfermedades. Sin embargo, no existe todavía la suficiente evidencia científica que consolide a la medicina herbaria dentro de los sistemas de salud. Objetivos. Identificar las prácticas comunes de atención de la salud, desarrolladas por la población rural de Babahoyo-Ecuador. Diseño. Estudio cualitativo etnográfico; cuantitativo obser...

The response of Plantago major ssp pleiosperma to elevated CO2 is modulated by the formation of secondary shoots

NARCIS (Netherlands)

Coelho Guerra da Fonseca, F.M; den Hertog, J; Stulen, G

The effect of elevated CO2 on the relative growth rate (RGR) of Plantago major ssp. pleiosperma was studied during the vegetative stage, in relation to plant development, by growing plants at 350 mu l l(-1) or at 700 mu l l(-1) CO2 in non-limiting nutrient solution with nitrate. To minimize

Representations and uses of medicinal plants in elderly men Representaciones y usos de las plantas medicinales en mayores Representações e usos de plantas medicinais por homens idosos

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Silvia Cristina da Silva Lima

2012-08-01

Full Text Available The aim of this study was to know and understand the representations and use of medicinal plants by elderly men assisted in the Family Health Strategies of Dourados, MS. Participated in this study, 18 elderly men aged over 60 years, using four or more medications. The research was conducted with qualitative approach. The results showed that there is still the consumption of medicinal plants among the elderly, especially in the treatment of minor harm. The representations about the plants seem anchored in the concept of safety; they are natural and few side effects. Its use is made concurrently with the manufactured medicines without regard to risk of interactions. Older men use medicinal plants, without however reporting to health professionals. Therefore, it is necessary continuing education focused on phytotherapy health team and nursing, contributing to safe and effective use of medicinal plants.El objetivo de este estudio fue conocer y comprender las representaciones y el uso de plantas medicinales por los mayores asistidos en Estrategias de Salud de la Familia de Dourados/MS. Participaron de ese estudio 18 hombres de edad con edad igual o superior a 60 años, haciendo uso de cuatro o más medicamentos. Se trató de investigación cualitativa, descriptiva y exploratoria. Los resultados apuntaron que aun existe el consumo de plantas medicinales entre los mayores, principalmente en el tratamiento de mortalidades menores. Las representaciones sobre las plantas medicinales parecen ancladas en la concepción de seguridad, o sea, son naturales y pocos efectos colaterales. Su uso es hecho concomitantemente con los medicamentos industrializados, sin atentar los riesgos de las interacciones. Los mayores utilizan las plantas medicinales sin, sin embargo, relatar a los profesionales de salud. Luego, se hace necesario la educación permanente del equipo de salud y de la enfermería vuelta para la fitoterapia, aportando al uso seguro y eficaz de las

Estudios etnobotánicos en la conurbación Buenos Aires-La Plata, Argentina: Productos de plantas medicinales introducidos por inmigrantes paraguayos

OpenAIRE

Julio A. Hurrell; Jeremías P. Puentes; Patricia M. Arenas

2017-01-01

Este trabajo incluye resultados parciales de una línea de investigación en Etnobotánica urbana, que estudia los conocimientos locales sobre las plantas, sus partes y productos derivados en la conurbación Buenos Aires-La Plata. Se incluyen productos de plantas medicinales de reciente ingreso en el área de estudio a través de inmigrantes oriundos de Paraguay. Los productos corresponden a 10 especies: Achyrocline alata(“jateí-ka’á”), Baccharis gaudichaudiana (“jaguareté-ka’á”), Cuphea lysimachio...

Estudio observacional del consumo de plantas medicinales en la provincia de Buenos Aires, Argentina, en el periodo diciembre de 2004-noviembre de 2005

OpenAIRE

Consolini, Alicia E.; Ragone, María Inés; Tambussi, Claudia Patricia; Paura, Andrea

2007-01-01

Las plantas medicinales (PM) son muy utilizadas popularmente en la actualidad, ya sea por considerarse remedios naturales, por su bajo costo económico o por costumbre popular. Sin embargo, poco se conoce sobre el consumo de las PM en la población y sobre los posibles efectos adversos o interacciones de las PM con medicamentos. Este trabajo observacional descriptivo describe el consumo de las PM en una muestra de 259 farmacias de la provincia de Buenos Aires, Argentina, durante el período de u...

Effects of fertilization and competition on plant biomass allocation and internal resources: Does Plantago lanceolata follow the rules of economic theory?

Czech Academy of Sciences Publication Activity Database

Janeček, Štěpán; Patáčová, E.; Klimešová, Jitka

2014-01-01

Roč. 49, č. 1 (2014), s. 49-64 ISSN 1211-9520 R&D Projects: GA ČR GA526/09/0963; GA ČR GA526/07/0808 Institutional research plan: CEZ:AV0Z60050516 Institutional support: RVO:67985939 Keywords : allocation * Plantago lanceolata * plasticity Subject RIV: EH - Ecology, Behaviour Impact factor: 1.778, year: 2014

The rate of aucubin, a secondary metabolite in Plantago lanceolata and potential nitrification inhibitor, needed to reduce ruminant urine patch nitrous oxide emissions

Science.gov (United States)

Gardiner, C. A.; Clough, T.; Cameron, K.; Di, H.; Edwards, G. R.

2017-12-01

Nitrous oxide (N2O) losses derived from grazing ruminant livestock urine patches account for 40% of global N2O emissions. It has been shown that Plantago lanceolata, an herb species used in grazed pastures, contains an active secondary metabolite (aucubin) that has the potential to be excreted by grazing ruminants and inhibit nitrification in the urine patch, a key step in soil N2O production. However, the urinary excretion rate of aucubin needed to significantly reduce urine patch N2O emissions remains unknown. Aucubin was dissolved in bovine urine at three rates (47, 243, and 486 kg ha-1), based on rates used in Dietz et al. (2013) and the calculated highest potential aucubin application rate, from Gardiner et al. (2017). A control, along with a urine treatment and the three aucubin treatments (all urine applied at 700 kg N ha-1), was applied to 20 g soil and incubated in the laboratory for 35 d. Soils were monitored for surface pH, inorganic N concentration (NH4+/NO3-), and gas (N2O and CO2) fluxes. This experiment is currently underway and the results will be presented at the conference. Dietz M, Machill S, Hoffmann H, Schmidtke K 2013. Inhibitory effects of Plantago lanceolata L. on soil N mineralization. Plant and Soil 368: 445-458. Gardiner CA, Clough TJ, Cameron KC, Di HJ, Edwards GR, de Klein CAM 2017. The potential inhibitory effects of Plantago lanceolata and its active secondary metabolite aucubin on soil nitrification and nitrous oxide emissions under ruminant urine patch conditions. Manuscript submitted for publication.

High incidence of teratologic changes in Plantago Lanceolata L. seedlings of the fifth post-disaster reproduction within the thirty kilometer zone of Chernobyl NPP

International Nuclear Information System (INIS)

Frolova, N.P.; Popova, O.N.; Taskaev, A.I.

1993-01-01

It was for the first time that of the fifth year of monitoring of Plantago Lanceolata L., reproduced within the thirty kilometer zone of Chernobyl NPP disaster, the authors discovered incidence of seedlings with various morphological abnormalities. It is suggested that the damages observed are related to the cumulative effect of radiation

Plantas medicinales de uso tradicional en Pinar del Río: Estudio etnobotánico. I

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Ramón Scull Lizama

1998-04-01

Full Text Available Se presentan los resultados de una encuesta realizada a los pobladores de 7 localidades de la provincia de Pinar del Río, la cual permitió establecer el uso tradicional de 112 plantas medicinales, que son empleadas en 27 afecciones diferentes. Se relacionan los nombres científicos de cada especie, su agrupación en familia, su representabilidad taxonómica, así como las propiedades que les son atribuidas en la zona de estudio. Los resultados concuerdan parcialmente con los obtenidos por otros investigadores en diferentes zonas del país.The results of a survey carried out among the inhabitants from 7 localities in the province of Pinar del Rio that allowed to establish the traditional use of 112 medicinal plants, which are used in 27 different affectations, are presented. The scientific names of each species, their family grouping, their taxonomic representativity, as well as the properties that are attributed to them according to the zone under study, are given. The results agree partially with those obtained by other investigators in different zones of the country.

Screening the wetland plant species Alisma plantago-aquatica, Carex rostrata and Phalaris arundinacea for innate tolerance to zinc and comparison with Eriophorum angustifolium and Festuca rubra Merlin

Energy Technology Data Exchange (ETDEWEB)

Matthews, David J. [Wetland Ecology Research Group, Department of Botany, University College Dublin, Belfield, Dublin 4 (Ireland)]. E-mail: davematt00@hotmail.com; Moran, Bridget M. [Wetland Ecology Research Group, Department of Botany, University College Dublin, Belfield, Dublin 4 (Ireland); Otte, Marinus L. [Wetland Ecology Research Group, Department of Botany, University College Dublin, Belfield, Dublin 4 (Ireland)

2005-03-01

Several wetland plant species appear to have constitutive metal tolerance. In previous studies, populations from contaminated and non-contaminated sites of the wetland plants Typha latifolia, Phragmites australis, Glyceria fluitans and Eriophorum angustifolium were found to be tolerant to high concentrations of metals. This study screened three other species of wetland plants: Alisma plantago-aquatica, Carex rostrata and Phalaris arundinacea for innate tolerance to zinc. The degree of tolerance was compared to known zinc-tolerant E. angustifolium and Festuca rubra Merlin. It was found that A. plantago-aquatica and P. arundinacea did not posses innate tolerance to zinc, but that C. rostrata was able to tolerate elevated levels of zinc, at levels comparable to those tolerated by E. angustifolium and F. rubra Merlin. The findings support the theory that some wetland angiosperm species tend to be tolerant to exposure to high levels of metals, regardless of their origin. - Some wetland angiosperms are tolerant to high concentrations of metals, regardless of conditions in the plants' natural habitat.

Screening the wetland plant species Alisma plantago-aquatica, Carex rostrata and Phalaris arundinacea for innate tolerance to zinc and comparison with Eriophorum angustifolium and Festuca rubra Merlin

International Nuclear Information System (INIS)

Matthews, David J.; Moran, Bridget M.; Otte, Marinus L.

2005-01-01

Several wetland plant species appear to have constitutive metal tolerance. In previous studies, populations from contaminated and non-contaminated sites of the wetland plants Typha latifolia, Phragmites australis, Glyceria fluitans and Eriophorum angustifolium were found to be tolerant to high concentrations of metals. This study screened three other species of wetland plants: Alisma plantago-aquatica, Carex rostrata and Phalaris arundinacea for innate tolerance to zinc. The degree of tolerance was compared to known zinc-tolerant E. angustifolium and Festuca rubra Merlin. It was found that A. plantago-aquatica and P. arundinacea did not posses innate tolerance to zinc, but that C. rostrata was able to tolerate elevated levels of zinc, at levels comparable to those tolerated by E. angustifolium and F. rubra Merlin. The findings support the theory that some wetland angiosperm species tend to be tolerant to exposure to high levels of metals, regardless of their origin. - Some wetland angiosperms are tolerant to high concentrations of metals, regardless of conditions in the plants' natural habitat

Botánica médica Guahibo. Plantas medicinales, mágicas y psicotrópicas utilizadas por los Sikuani y Cuiba (Llanos orientales de Colombia Botánica médica Guahibo. Plantas medicinales, mágicas y psicotrópicas utilizadas por los Sikuani y Cuiba (Llanos orientales de Colombia

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Ortiz Gómez Francisco

1989-09-01

Full Text Available This work deals with the inventory and description of the medical, magical and psicothropic plants used by the Sikuani and Cuiba indians of the Colombian and Venezuelan Llanos. The names in the indian languages were registered along with a translation and a brief description of uses and applications. Se presenta un inventario y descripción de usos de las plantas medicinales, mágicas y psicotrópicas utilizadas por los indígenas Sikuani y Cuiba de los Llanos de Colombia y Venezuela. Se anotan los nombres en lengua, su traducción y una breve descripción de su uso y aplicaciones.

Uso tradicional de plantas medicinales con acción diurética en el Municipio de Quemado de Güines, Cuba

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Maykel Pérez Machín

2011-12-01

Full Text Available La flora de Cuba es muy rica en plantas medicinales, de las cuales se reportan aproximadamente 179 especies que la población utiliza para fines diuréticos, sin embargo, un gran número de ellas carece de validación experimental de su efecto farmacológico. El presente estudio se realizó con el propósito de documentar la importancia relativa de las especies medicinales más empleadas con fines diuréticos en el municipio de Quemado de Güines de la provincia de Villa Clara, Cuba. Se realizó un estudio etnobotánico en dos comunidades pertenecientes a ese municipio, para lo cual se realizó un muestreo a un total de 85 habitantes, y se aplicó aleatoriamente 80 encuestas a conocedores de plantas y 5 entrevistas entre yerberos y médicos practicantes de medicina tradicional, los cuales nos indicaron las plantas más utilizadas con estos fines en las comunidades estudiadas. La información etnofarmacológica fue registrada mediante la metodología TRAMIL y las especies de interés fueron identificadas y depositadas en el Herbario de la Universidad Central "Marta Abreu" de Las Villas. Los datos se analizaron mediante los índices cuantitativos de valor de uso para cada especie (IVU y el nivel de uso significativo (UST. Este indicador expresa que aquellos usos medicinales que son citados con una frecuencia superior o igual al 20%, por las personas encuestadas pueden considerarse significativos desde el punto de vista de su aceptación cultural y, por lo tanto, merecen su validación científica en Cuba. Se identificaron 26 especies medicinales agrupadas en 19 familias botánicas y se encontraron 10 plantas con un mayor nivel de uso significativo y un mayor IVU. El 53.8% de las plantas reportadas como diuréticas no se han validado experimentalmente en Cuba, el resto de las especies identificadas han sido estudiadas a nivel preclínico, pero aún no está autorizado su empleo como fitomedicamento.Tradicional use of medicinal plants with diuretic

Plantas medicinales en el tratamiento de la Diabetes Mellitus Tipo 2: una revisión

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Gallego Muñoz C

2015-12-01

Full Text Available Objetivo: El objetivo de esta revisión es proporcionar a los farmacéuticos comunitarios información práctica para orientar a los pacientes con DM2 en tratamiento con plantas medicinales. Material y método: Se realizó una búsqueda exhaustiva de la literatura publicada en las principales bases de datos hasta el 31 de marzo de 2014. Las revisiones y estudios seleccionados fueron sometidos a lectura crítica y a la evaluación de su calidad metodológica. Resultados: Los pacientes, a menudo, solicitan asesoramiento farmacéutico para el empleo de estas plantas en el tratamiento de DM2; sin embargo, no existen estudios robustos que ayuden a los farmacéuticos a ofrecer consejos con fiabilidad. Los estudios existentes incluyen pocos pacientes, están mal diseñados y los resultados son heterogéneos. Conclusión: El fenogreco o alholva posee un efecto hipoglucemiante con una fuerte evidencia científica. También existe buena evidencia en el caso de ivy gourd y gymnema en el manejo de la hiperglucemia.

Aluminium stress disrupts metabolic performance of Plantago almogravensis plantlets transiently.

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Grevenstuk, Tomás; Moing, Annick; Maucourt, Mickaël; Deborde, Catherine; Romano, Anabela

2015-12-01

Little is known about how tolerant plants cope with internalized aluminium (Al). Tolerant plants are known to deploy efficient detoxification mechanisms, however it is not known to what extent the primary and secondary metabolism is affected by Al. The aim of this work was to study the metabolic repercussions of Al stress in the tolerant plant Plantago almogravensis. P. almogravensis is well adapted to acid soils where high concentrations of free Al are found and has been classified as a hyperaccumulator. In vitro reared plantlets were used for this purpose in order to control Al exposure rigorously. The metabolome of P. almogravensis plantlets as well as its metabolic response to the supply of sucrose was characterized. The supply of sucrose leads to an accumulation of amino acids and secondary metabolites and consumption of carbohydrates that result from increased metabolic activity. In Al-treated plantlets the synthesis of amino acids and secondary metabolites is transiently impaired, suggesting that P. almogravensis is able to recover from the Al treatment within the duration of the trials. In the presence of Al the consumption of carbohydrate resources is accelerated. The content of some metabolic stress markers also demonstrates that P. almogravensis is highly adapted to Al stress.

Assessment of reproductive capacity of estuarine plants Butomus umbellatus L. and Alisma plantago-aquatica L. from radioactively contaminated flood plains

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Kaneva, A.V.; Majstrenko, T.A.; Rachkova, N.G.; Belykh, E.S.; Zainullin, V.G. [Institute of Biology, Komi Scientific Center, Ural Division of RAS, Syktyvkar, 167982 (Russian Federation)

2014-07-01

It is known that the vegetation, along with the climatic conditions and soil type, is one of the key components of terrestrial ecosystems. They are also first to respond to the substrate contamination with radionuclides, metals and organic substances. Biological effects observed in natural plant populations are associated with both presence of mobile compounds of pollutants in abiotic components of the ecosystem and their role in the metabolism of the plant. The goal of the study was to assess the impact of water and sediment contamination with artificial radionuclides and toxic non-radioactive compounds, on the reproductive capacity of estuarial plants using seed germination. Contaminated sites are located in flood plain of the Techa River (Chelabinsk region, Russia) between Muslumovo and Brodokalmak settlements. Radioactive contamination of the territory resulted from increased specific activities of {sup 137}Cs and {sup 90}Sr in water and sediments due to the accidents on the Mayak Production Association. Reference sites were chosen in the flood plains of Brusianka and Sysert' rivers (Sverdlovsk region, Russia). Reference sites are located out of the Eastern Ural Radioactive Trace. Seeds of Butomus umbellatus L. and Alisma plantago-aquatica L., which are common estuarine plant communities in this area, were collected. Specific activities of dose-forming radionuclides in the Techa river water vary from 120 up to 200 mBq/l for {sup 137}Cs and from 26 up to 45 mBq/l for {sup 90}Sr; and in sediments 720-10150 Bq/kg and 600-1500 Bq/kg for {sup 137}Cs and {sup 90}Sr correspondingly. Specific activities of {sup 137}Cs and {sup 90}Sr in water and sediments of both reference rivers do not exceed global fallout levels. B. umbellatus seeds germination was low for plant populations of both reference and contaminated sites. However, a significant (p<0.01) difference was found - the value was higher for reference populations (17.4 ±3.5 %) as compared with the ones from

Structural Features of Alkaline Extracted Polysaccharide from the Seeds of Plantago asiatica L. and Its Rheological Properties

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Jun-Yi Yin

2016-09-01

Full Text Available Polysaccharide from the seeds of Plantago asiatica L. has many bioactivities, but few papers report on the structural and rheological characteristics of the alkaline extract. The alkaline extracted polysaccharide was prepared from seeds of P. asiatica L. and named herein as alkaline extracted polysaccharide from seeds of P. asiatica L. (PLAP. Its structural and rheological properties were characterized by monosaccharide composition, methylation, GC-MS and rheometry. PLAP, as an acidic arabinoxylan, was mainly composed of 1,2,4-linked Xylp and 1,3,4-linked Xylp residues. PLAP solution showed pseudoplastic behavior, and weak gelling properties at high concentration. Sodium and especially calcium ions played a significant role in increasing the apparent viscosity and gel strength.

Evaluación de la toxicidad aguda de extractos de plantas medicinales por un método alternativo (Evaluation of acute toxicity of extracts of medicinal plants by an alternative testing)

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Deodelsy Bermúdez Toledo:; |Emilio Monteagudo Jimenez; Maria Boffill Cárdenas; Luis E. Díaz Costa; Alexander Roca Simeón; Emoe Betancourt Morgado; Enrique A Silveira Prado

2007-01-01

Se evaluó la toxicidad a dosis única de seis extractos de plantas medicinales: Psidium guajava L. (guayaba), Eucalyptus citriodoraHooker (eucalipto de limón), Cymbopogon citratus (DC) Stapf (caña santa, hierba de limón), Hibiscus elatus Sw. (majagua), Justicia pectoralis Jacq. (tilo), Plectranthus amboinicus (Lour.) Spreng (orégano francés) mediante un método alternativo e internacionalmente validado y aceptado (procedimiento de dosis fijas) en ratasSprague Dawley. El grupo tratado recibió po...

Plantago lanceolata growth and Cr uptake after mycorrhizal inoculation in a Cr amended substrate

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Amaia Nogales

2012-03-01

Full Text Available Arbuscular mycorrhizal fungi from two chromium contaminated sites, one with 275 mg kg-1 of Cr (zone A and the other with 550 mg kg-1 Cr (zone B, were multiplied and tentatively identified. The effect of both fungal consortia on Plantago lanceolata plant growth in a substrate amended with 200 mg kg-1 of Cr and with 400 mg kg-1 Cr was assessed and compared with the growth of plants inoculated with Glomus intraradices BEG72. Only the plants inoculated with G. intraradices BEG72 and with the fungal consortia obtained from the area with a high Cr contamination (zone B grew in the soil with 400 mg kg-1 of Cr. The consortia of fungi from zone B, decreased the plant’s uptake/translocation of the heavy metal compared with G. intraradices BEG72. These results underscore the differential effect of AM fungi in conferring bioprotection in Cr contaminated soils.

Treatment of water turbidity and bacteria by using a coagulant extracted from Plantago ovata

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Bahman Ramavandi

2014-08-01

Full Text Available A biocoagulant was successfully extracted from Plantago ovata by using an FeCl3-induced crude extract (FCE. The potential of FCE to act as a natural coagulant was tested for clarification using the turbid water of a river. Experimental tests were performed to evaluate the effects of turbidity concentration, coagulant quantity, water pH, and humic acid concentration on the coagulation of water turbidity by FCE. The maximum turbidity removal was occurred at water pH<8. At the optimum dosage of FCE, only 0.8 mg/L of dissolved organic carbon was released to the treated water. An increase in the humic acid led to the promotion of the water turbidity removal. Results demonstrated that the FCE removed more than 95.6% of all initial turbidity concentrations (50–300 NTU. High bacteriological quality was achieved in the treated water. FCE as an eco-friendly biocoagulant was revealed to be a very efficient coagulant for removing turbidity from waters.

Photoprotection by carotenoids of Plantago media photosynthetic apparatus in natural conditions.

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Golovko, Tamara; Dymova, Olga; Zakhozhiy, Ilya; Dalke, Igor; Tabalenkova, Galina

2012-01-01

The study of daily changes in photosynthetic rate, of energy used in photochemical and non-photochemical processes, and of carotenoid composition aimed at evaluating the role of xanthophyll cycle (XC) in protection of hoary plantain plants (Plantago media) in nature. The leaves of sun plants differed from shade plants in terms of CO(2) exchange rate and photosynthetic pigments content. The total pool XC pigments and the conversion state increased from morning to midday in sun plants. An increase in zeaxanthin content occurred concomitantly with the violaxanthin decrease. About 80% violaxanthin was involved in conversion. The maximum of zeaxanthin in XC pigments pool was 60%. The conversion state of XC was twice as lower in shade plants than that in sun plants. The photosynthesis of sun leaves was depressed strongly at midday, but changes of maximum quantum yield of PS2 (F(v)/F(m)) were not apparent at that time. The coefficient qN (non-photochemical quenching) in the sun leaves changed strongly, from 0.3 to 0.9 as irradiance increased. The direct relation between heat dissipation and the conversion state of XC in plantain leaves was revealed. Thus, plantain leaves were found to be resistant to excess solar radiation due to activation of qN mechanisms associated with the XC de-epoxidation.

Analysis of mining-medicinal waters regulation. Possible treatments Análisis sobre la normativa de las aguas minero-medicinales. Posibles tratamientos

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Juan Antonio López Geta

2006-12-01

Full Text Available The mineral waters have been a part of our lives for many centuries, since they are believe to be beneficial and to have therapeutic properties for the human health. This fact makes a key issue to provide an analyses od the current legislation on this issue ( Royal Decree-Law 743/1928, April 25th, that aproves the statute on exploitation of spring of mineral and medicinal water; Mining Law of 1973 and its regulations, in order to determine the treatments that may be applied to these watersm meanly in the case of Legionella appearance, or as preventive maesure of it. The results of this analysis shows that there is no limitation or prohibition in the treatments to what they may be subjected, as long as their physico-chemical characteristic remains altered. Contamination by Legionella bacterium, is nowadays an issue of concern, and that is reason why Public Health Authority has established the quidelines to apply for spas in order to avoid or fight a possible outbreak.Las aguas minero-medicinales han estado y están presentes en nuestras vidas desde épocas remotas hasta la actualidad, ya que a las mismas se le atribuyen propiedades terapéuticas beneficiosas para el organismo humano. Este hecho, hace que sea trascendente un análisis de la legislación vigente en esta materia (El Real Decreto-Ley de 743/1928, de 25 de abril, por el que se aprueba el Estatuto sobre la explotación de manantiales de aguas minero-medicinales; Ley de Minas de 1973 y el Reglamento que la desarrolla, para determinar los posibles tratamientos a que pueden ser sometidas estas aguas, especialmente en el caso de aparición de la Legionella, o como medida preventiva de la misma. De las diferentes normativas, se deduce que no existe limitación o prohibición alguna en los tratamientos a los que pueden estar sujetas, siempre y cuando no se alteren las características del agua y sus efectos. La Legionella, constituye un nuestros días un motivo de preocupación, por la que

Aislamiento de consorcios de hongos micorrícicos arbusculares de plantas medicinales y su efecto en el crecimiento de vinca (Catharanthus roseus Isolation of arbuscular mycorrhizal fungi consortia from medicinal plants and their effectiveness on growth of vinca (Catharanthus roseus

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CLAUDIA DE LA ROSA-MERA

2012-06-01

Full Text Available Este trabajo consistió en propagar e identificar hongos micorrícicos arbusculares (HMA recolectados de plantas medicinales (PM de áreas naturales de bosques mixtos, y seleccionar consorcios micorrícicos con base en la promoción del crecimiento de vinca Catharanthus roseus (L G. Don, planta medicinal cuyos alcaloides tienen propiedades antineoplásicas. En la primera fase experimental se recolectaron raíces y suelo rizosférico de 13 PM establecidas en campo para evaluar el porcentaje de colonización total (PCT y cuantificar el número de esporas; además, se tomó una parte del suelo para establecer plantas trampa en invernadero durante 10 meses, y posteriormente evaluar el PCT e identificar los principales géneros de HMA. Todas las PM en su condición natural presentaron colonización micorrícica, observándose cuatro géneros de HMA (Glomus, Acaulospora, Gigaspora y Scutellospora, de los cuales Acaulospora y Glomus fueron los predominantes. En la segunda fase experimental se seleccionaron ocho consorcios con base en el PCT (> 40 % obtenido en las plantas trampa, que correspondieron a las muestras recolectadas de Adiantum capillus-veneris L., Castilleja tenuiflora Benth., Erigeron karvinskianus DC., Pimpinella anisum L., Plantago major L., Ricinus communis L., Rubus fruticosus L. y Rumex mexicanus Meisn. Estos consorcios fueron inoculados en plántulas de C. roseus para evaluar su capacidad de estimular el crecimiento de esta especie en condiciones de invernadero. Después de 70 días, a pesar de presentar un solo género predominante (Glomus, el consorcio aislado de R. mexicanus promovió de manera más consistente el crecimiento de C. roseus (número de hojas, área foliar y peso seco foliar en comparación con el resto de los consorcios micorrícicos.This study consisted on propagating and identifying arbuscular mycorrhizal fungi (AMF collected from medicinal plants (MP of natural areas of mixed forest (Estado de Mexico, and

Uso tradicional de plantas medicinales en la vereda San Isidro, municipio de San José de Pare-Boyacá, Colombia: un estudio preliminar usando técnicas cuantitativas

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Jarvis Yamith Toscano González

2005-07-01

se deben tener al ser administradas. Los datos fueron analizados mediante el Índice de Valor de Uso (IVUs y el Nivel de Uso Significativo de TRAMIL. Se registraron 35 especies de plantas de uso medicinal, distribuidas en 20 familias, representadas en su mayoría por Asteraceae, Lamiaceae, Solanaceae y Rutaceae. Se reportaron 11 especies con un mayor valor de importancia en medicina tradicional. La documentación de los usos de las plantas medicinales en el área de influencia, revela que el conocimiento tradicional continúa profundamente arraigado entre la comunidad y se mantiene el saber popular a manos de curanderos y madres cabeza de familia.

PLANTAS MEDICINALES USADAS POR LOS COGUI EN EL RÍO PALOMINO, SIERRA NEVADA DE SANTA MARTA (COLOMBIA

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EDUINO CARBONÓ-DELAHOZ

2013-12-01

Full Text Available Con el propósito de registrar conocimientos tradicionales sobre plantas medicinales entre los Cogui o Kággaba en la cuenca del río Palomino, Sierra Nevada de Santa Marta (Colombia, se evaluó el uso de la flora con la aplicación de una técnica etnobotánica cuantitativa. Mediante entrevistas a mamos o sacerdotes-jefes, durante recorridos en áreas silvestres, cultivadas y huertos caseros en diferentes zonas climáticas de la cuenca, se obtuvo información de 189 especies utilizadas, incluidas en 162 géneros y 77 familias, así como el modo de uso y la forma de preparación para el tratamiento de enfermedades comunes. Las familias Asteraceae y Leguminosae registraron el mayor número de especies útiles. La evaluación con el índice de importancia relativa (IR permitió establecer que Ladenbergia moritziana (Rubiaceae, Stevia lucida (Asteraceae, Aniba sp. (Lauraceae, Erechtites hieracifolia (Asteraceae y Carex sp. (Cyperaceae son las especies con mayores valores de importancia. El 89 % de las plantas utilizadas es obtenido de espacios silvestres, lo que sugiere un conocimiento amplio de la diversidad vegetal local y el ejercicio de una práctica etnomédica.

Identificación, uso y transmisión local del conocimiento en plantas medicinales con fines veterinarios en fincas campesinas de tres regiones de Cuba

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Yuván Contino Esquijerosa

2012-07-01

Full Text Available RESUMEN Las fincas campesinas son importantes espacios para la producción de plantas medicinales como recurso sociocultural y económico. La flora medicinal y ritual ocupa un espacio destacado en los pueblos indígenas, descendientes de africanos u españoles. El objetivo de este trabajo fue identificar las plantas medicinales, su uso y transmisión local con fines veterinarios, en fincas campesinas de tres regiones de Cuba (Pinar del Río, Matanzas y Sancti Espíritus. Se realizaron talleres y se trabajó con la identificación, uso, aprendizajes y mecanismo de diseminación local. Se compartieron las ideas para identificar, usar y capturar-trasmitir conocimientos sobre las plantas medicinales con fines veterinarios. Se realizaron colectas y se socializaron sus formas de preparación. Se identificaron 20 plantas de diversas familias botánicas y se estableció un huerto medicinal en cada región. Las hojas, los tallos y las raíces fueron las partes de la planta más utilizadas para la elaboración de recetas. La falta de medicamentos tradicionales y la carencia de recursos materiales determinan su empleo. El personal entrevistado mostró un profundo conocimiento de su entorno vegetal adquirido de sus ancestros y trasmitido a través de la palabra u oralidad. Este conocimiento tradicional se está perdiendo debido a la invasión de personas no nativas que se han establecido en estas regiones, y han eliminado la vegetación natural, e introducido nuevas especies con otros fines. La sistematización de estos aprendizajes de manera lógica se convierte en punto de partida para futuros proyectos de investigación, que permitan su explicación, aplicación y adaptación a los sistemas agropecuarios sostenibles. ABSTRACT Peasant farms are important areas for the production of medicinal plants as cultural and economic resource . The medicinal and ritual plant occupies a large area in the indigenous peoples of African descent or Spanish . The aim of

Potencial alelopático de extratos aquosos de Melissa officinalis L. e Mentha x villosa L. na germinação e vigor de sementes de Plantago major L. Allelopathic effect of extracts of Melissa officinallis L. and Mentha x villosa L. on seed germination and vigor of Plantago major L.

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F.P.G. Bonfim

2011-01-01

Full Text Available O objetivo do trabalho foi avaliar o efeito dos extratos aquosos de hortelã e melissa na germinação e vigor de sementes de tanchagem. O experimento foi conduzido no Departamento de Fitotecnia da Universidade Federal de Viçosa, no mês de abril de 2011. O delineamento utilizado foi o inteiramente casualizado com cinco tratamentos (testemunha, 25%, 50%, 75% e 100 % do extrato aquoso de hortelã e melissa e quatro repetições. Os extratos foram preparados utilizando a parte aérea das plantas, na proporção de 100g de planta para 1 L de água destilada. Foram utilizadas 50 sementes de tanchagem em cada caixa gerbox, previamente umedecido com os extratos aquosos (correspondentes aos tratamentos, estas foram levadas para germinar em câmara de germinação, em temperatura de 20°C, fotoperíodo de 16 horas luz e 8 horas escuro, por 14 dias. Durante esse tempo foram feitas às contagens diárias das sementes germinadas para calcular o índice de velocidade de germinação e ao final dos 14 dias foi calculada a porcentagem de germinação. Sementes de tanchagem não submetidas aos extratos aquosos de melissa e hortelã apresentaram-se mais vigorosas quando comparado com as concentrações, evidenciando o potencial alelopático de melissa e hortelã sobre a sua qualidade fisiológica.The aim of this work was to evaluate the effect of aqueous extracts of Melissa officinallis and Mentha x villosa for the germination and vigor of Plantago major seeds. The experiment was conducted at the Plant Science Department, Federal University of Viçosa, in April 2011. The design was a completely randomized design with five treatments (control, 25%, 50%, 75% and 100% of the aqueous extract of Mentha x villosa and Melissa Officinallis and four replications. The extracts were prepared utulizando the shoots of plants at the rate of 100g of plant to 1 L of distilled water. We used 50 Plantago major seeds in each box incubator and these were subsequently placed in a

Estudios etnobotánicos sobre plantas medicinales en la provincia de Camagüey (Cuba

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Álvarez, Raquel

2004-12-01

Full Text Available An ethnobotanical study has been conducted on traditional medicinal plant uses in seven communities of the Province of Camagüey, Cuba. Ethnobotanical information on 111 plant species from 96 genera and 55 families have been recorded along with 116 different vernacular names. These species are used in the treatment of 173 local health problems (mainly in respiratory, digestive, liver and gallbladder, and skin disorders. Chemistry composition of 39 species is unknown and ethnopharmacological use of 18 species has not been reported previously in the literature. The data collected in this study contribute to the pharmacological and toxicological evaluation of some of the studied species.Como resultado del trabajo de campo realizado en siete comunidades de la provincia de Camagüey, Cuba, sobre el uso popular e indicaciones de plantas medicinales, se presenta información etnobotánica sobre 111 especies de plantas pertenecientes a 96 géneros y a 55 familias. Se obtuvieron 173 indicaciones de uso medicinal, principalmente para afecciones respiratorias, digestivas, hepatobiliares y dermatológicas. Se listaron 116 nombres vernáculos de especies vegetales. Se desconoce la composición química de 39 de las especies y de 18 no se encontraron referencias de su utilización en farmacia. Los datos empíricos obtenidos sobre usos de plantas estimularon la validación farmacológica y toxicológica de algunas de ellas.

In-Vitro Efficacy of Plantago lanceolata L. Extracts on Trichomonas Vaginalis

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Mohammad Matini

2017-09-01

Full Text Available Abstract Background: Trichomoniasis is one of the most common non viral sexually transmitted diseases worldwide. The aim of this study was to investigate the effect of Plantago lanceolata extracts on Trichomonas vaginalis. Materials and Methods: In this study, after collection and drying of P. lanceolata, n-hexanic, ethyl acetate, methanol and hydroalcoholic extracts, they were prepared by maceration. Five clinical T. vaginalis isoleates subjected to extract suscebtibility testing, in comparison of metronidazole. Minimum inhibitory concentration (MIC and minimum lethal concentration (MLC tests were carried out in duplicate and repeated two times for each T. vaginalis isolate. Results: The results showed that the extracts of P. lanceolata had potent antitrichomonal activity. The most antitrichomonal activity was related to ethyl acetate extract with the least MIC of 500 µg/ml and mean of 1525 µg/ml, after 48 hrs incubation. And also, the lowest antitrichomonal activity was related to hydroalcoholic and methanolic extract with the least and mean MIC of 2000 µg/ml. The results of MLC and MIC tests were identical and this finding confirmed the trichomonacidal activity of the extracts. The drug suscebtibility testing showed that the T. vaginalis isoleates were susceptibale to metronidazole ranging from 3.1 to 6.2 µg/ml with a mean and standard deviation of 4.2 ± 1.5 µg/ml. Conclusion: This study showed that the extracts of P. lanceolata hav e a considerable activity on T. vaginalis parasite. Hence, further studies are needed to clear more details of antimicrobial properties of P. lanceolata compounds.

Colonic production of butyrate in patients with previous colonic cancer during long-term treatment with dietary fibre (Plantago ovata seeds)

DEFF Research Database (Denmark)

Nordgaard, I; Hove, H; Clausen, M R

1996-01-01

BACKGROUND: Butyrate has antineoplastic properties against colorectal cancer cells and is the preferred oxidative substrate for colonocytes. Like acetate and propionate (short-chain fatty acids; SCFAs), butyrate is produced by colonic fermentation of dietary fibre. METHODS: Twenty patients resected...... for colorectal cancer were treated with 20 g/day of the fibre Plantago ovata seeds for 3 months, which increased the intake of fibre by 17.9 +/- 0.8 g/day, from basal levels of 19.2 +/- 1.7 g/day; 17 patients completed the study. Faecal samples were obtained on eight occasions, twice before treatment......, and monthly three times during and three time after treatment. RESULTS: One month of fibre therapy increased faecal concentrations of butyrate by 42 +/- 12% (from 13.2 +/- 1.2 to 19.3 +/- 3.0 mmol/l; P

Uso de plantas medicinales en el tratamiento de afecciones transmitidas por el agua en una comunidad toba (qom del Impenetrable (Chaco, Argentina: Una perspectiva etnoecológica y sanitaria

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Gustavo J. Martínez

2011-07-01

Full Text Available Se caracteriza a través de una investigación etnoecológica y participativa, las representaciones y prácticas vernáculas relacionadas con la prevención y tratamiento natural de problemáticas sanitarias que se transmiten a través del agua (como cólera, diarrea, gastroenteritis, disentería, hepatitis, entre los tobas (qom del Chaco Impenetrable. Se documentaron en este contexto el uso de 64 especies medicinales vinculadas con el alivio de los síntomas gastrointestinales característicos de estas dolencias. Los resultados se discuten en orden a la planificación y desarrollo de estrategias locales de protección de la salud ambiental en comunidades indígenas del Gran Chaco.

Plantas medicinales que se venden en el mercado El Río, Camagüey, Cuba Medicinal plants sold at the El Río Market, Camagüey, Cuba

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Daimy Godínez-Caraballo

2008-06-01

Full Text Available Con la información obtenida de las plantas medicinales vendidas en el mercado El Río, Camagüey, Cuba, se registró un total de 184 especies pertenecientes a 69 familia de plantas vasculares. La familia más importante fue Fabaceae s.l. con 13 especies, seguida por Lamiaceae con 12 y Asteraceae con 8. Más de 90 indicaciones medicinales en general fueron recogidas para tratar un amplio rango de enfermedades y dolencias. El mayor número de especies y aplicaciones fueron reportadas para desórdenes del sistema digestivo, sistema musculoesquelético (reumatismo y contusiones, problemas renales y trastornos ginecológicos. Las partes de las plantas más usadas fueron la hoja (42.9% y el fruto (22.3%. Los remedios se preparan principalmente como decocción (51.6% e infusión (39.1%. Los datos recolectados muestran el conocimiento y uso de la medicina herbolaria por parte de la población camagüeyana para tratar varias enfermedades.Information regarding medicinal plants sold in the El Río Market, Camagüey, Cuba, revealed 184 species belonging to 69 vascular plant families. The most important family was Fabaceae s.l. with 13 species, followed by Lamiaceae with 12, and Asteraceae with 8. More than 90 general medicinal indications were recorded to treat a wide range of illnesses and ailments. The highest number of species and applications were reported for digestive system disorders, the musculoskeletal system (rheumatism and the complex of contusions, kidney and other urological problems, and gynecological disorders. The part of the plant most frequently used was the leaf (42.9% and the fruit (22.3%. The remedies were mainly prepared as a decoction (51.6% and an infusion (39.1%. The present data document the knowledge of herbal medicine by villagers of Camagüey for to treat health problems.

“Sticky invasion” – the physical properties of Plantago lanceolata L. seed mucilage

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Agnieszka Kreitschitz

2016-12-01

Full Text Available The mucilage envelope of seeds has various functions including the provision of different ways for the dispersal of diaspores. Chemical composition and water content of the mucilage yield particular adhesive and frictional properties in the envelope that also influence the dispersal of seeds. To determine the physical properties of Plantago lanceolata seed mucilage we studied (1 composition, (2 desiccation, (3 adhesion, and (4 friction properties of the mucilage under different hydration conditions. We revealed the presence of cellulose fibrils in the mucilage, which are responsible for a continuous and even distribution of the mucilaginous layer on the seed surface. The measured values of adhesive and frictional properties differed significantly in comparison to the previously studied pectic mucilage of Linum usitatissimum. Also, the water loss from the cellulose mucilage was more rapid. The obtained different values can result from the presence of cellulose fibrils and their interaction with pectins in the mucilage. Because of this feature the mucilage of P. lanceolata may represent a more regularly ordered and stabile system than the pectic mucilage of flax, which lacks cellulose. In spite of the fact that P. lanceolata mucilage revealed different adhesive and frictional properties than the pectic mucilage, it still demonstrates an effective system promoting zoochoric seed dispersal. Cellulose may additionally prevent the mucilage against loss from the seed surface.

Biotransformation of flubendazole and fenbendazole and their effects in the ribwort plantain (Plantago lanceolata).

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Stuchlíková, Lucie Raisová; Skálová, Lenka; Szotáková, Barbora; Syslová, Eliška; Vokřál, Ivan; Vaněk, Tomáš; Podlipná, Radka

2018-01-01

Although veterinary anthelmintics represent an important source of environmental pollution, the fate of anthelmintics and their effects in plants has not yet been studied sufficiently. The aim of our work was to identify metabolic pathways of the two benzimidazole anthelmintics fenbendazole (FBZ) and flubendazole (FLU) in the ribwort plantain (Plantago lanceolata L.). Plants cultivated as in vitro regenerants were used for this purpose. The effects of anthelmintics and their biotransformation products on plant oxidative stress parameters were also studied. The obtained results showed that the enzymatic system of the ribwort plantain was able to uptake FLU and FBZ, translocate them in leaves and transform them into several metabolites, particularly glycosides. Overall, 12 FLU and 22 FBZ metabolites were identified in the root, leaf base and leaf top of the plant. Concerning the effects of FLU and FBZ, both anthelmintics in the ribwort plantain cells caused significant increase of proline concentration (up to twice), a well-known stress marker, and significant decrease of superoxide dismutase activity (by 50%). In addition, the activities of four other antioxidant enzymes were significantly changed after either FLU or FBZ exposition. This could indicate a certain risk of oxidative damage in plants influenced by anthelmintics, particularly when they are under other stress conditions. Copyright © 2017 Elsevier Inc. All rights reserved.

Photosynthetic adaptation to light intensity in plants native to shaded and exposed habitats. [Rumex acetosa; Geum rivale; Lamium galeobdolon; Plantago lanceolata

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Bjoerkman, O; Holmgren, P

1966-01-01

Photosynthetic adaptation to light intensity has been studied in clones of populations from shaded and exposed habitats of Rumex acetosa and Geum rivale. Clones of the shade species Lamium galeobdolon and the sun species Plantago lanceolata were also included for comparison. The plants were grown under controlled conditions at a high and a low light intensity. The capacity of photosynthetic carbon dioxide uptake at low as well as at saturating light intensities was determined on single attached leaves. As was previously demonstrated in Solidago virgaurea, clones of populations native to shaded and to exposed environments show differences in the photosynthetic response to light intensity during growth. The data provide evidence that populations of the same species native to habitats with contrasting light intensities differ in their photosynthetic properties in an adaptive manner in a similar mode as sun and shade species. 1 reference, 1 figure, 2 tables.

Anatomía foliar de hierbas terrestres medicinales que crecen en la región rioplatense (Buenos Aires, Argentina

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Marcelo P. M. Hernández

2015-07-01

Full Text Available El presente trabajo se desarrolló en el marco del proyecto “Anatomía de los órganos vegetativos con propiedades medicinales de Espermatófitas rioplatenses. I. Hierbas terrestres”. En esta oportunidad realizamos el estudio de las características micrográficas foliares de 62 especies pertenecientes a 24 familias. El objetivo fue generar una clave dicotómica para identificar los taxones a partir de las hojas, ya sea que este material se encuentre al estado entero o fragmentado y brindar información en un cuadro comparativo de los parámetros cuantitativos, los cuales son importantes herramientas en el control de calidad farmacognóstica. Se estudiaron hojas maduras frescas y de ejemplares de herbario empleando técnicas histológicas convencionales (“peeling”, impronta, diafanización, cortes transversales. Se practicaron métodos microquímicos para la identificación de almidón, mucílagos, sustancias lipofílicas y mirosina. Las principales diferencias se encontraron en la forma de las células epidérmicas, distribución y tipo de estomas, tipos de tricomas, mesofilo foliar, características de la vena media e índices estomático y de pilosidad. La presencia de una endodermis conspicua; los diferentes tipos de cristales y reservorios secretores internos (células, cavidades y conductos contribuyeron a la elaboración de una clave de diferenciación.

Estudios etnobotánicos en la conurbación Buenos Aires-La Plata, Argentina: Productos de plantas medicinales introducidos por inmigrantes paraguayos

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Julio A. Hurrell

2016-01-01

Full Text Available Este trabajo incluye resultados parciales de una línea de investigación en Etnobotánica urbana, que estudia los conocimientos locales sobre las plantas, sus partes y productos derivados en la conurbación Buenos Aires-La Plata. Se incluyen productos de plantas medicinales de reciente ingreso en el área de estudio a través de inmigrantes oriundos de Paraguay. Los productos corresponden a 10 especies: Achyrocline alata(“jateí-ka’á”, Baccharis gaudichaudiana (“jaguareté-ka’á”, Cuphea lysimachioides(“ysypó-peré”, Euphorbia serpens(“tupasý-kambý”, Genipa americana(“ñandypá”, Helietta apiculata(“yvyra ovy”, Lycopodiella cernnua(“itápotý”, Rhynchosia balansae(“urusú-he’ě”, Stevia rebaudiana(“ka’á-he’ě” y Victoria cruziana(“jacaré-yrupé”. Para cada caso se indican sus productos, muestras de referencia, usos asignados, actividad biológica y efectos estudiados. La presencia de los productos de estas especies en el área metropolitana indica un aumento de la diversidad biocultural local, tanto de plantas y productos como de sus conocimientos asociados.

Toxicidad sub-crónica y prueba de irritabilidad ocular del extracto acuoso de las hojas de Plantago major (Plantaginaceae

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Mildred García González

2003-09-01

Full Text Available Se utilizaron 20 ratones albinos de la cepa NGP, machos, distribuidos en dos grupos de diez ratones cada uno con peso promedio de 20.15 ± 0.059 g los animales que recibieron el tratamiento (2000 mg/kg y de 21.62 ± 0.03 g los animales que recibieron el control (0.5 ml de agua desionizada. Todos los tratamientos fueron administrados diariamente durante 5 días consecutivos por semana durante un período total de 40 días. No se presentó mortalidad con la dosis administrada por vía oral, sin embargo los animales presentaron disminución del reflejo de enderezamiento, de la actividad prensil anterior y posterior y de la reacción de alarma. Para la prueba de irritabilidad ocular se utilizaron 5 conejos de la cepa New Zeland, machos con peso promedio de 3.640 Kg. Se inoculó el ojo derecho con 200 µl del preparado acuoso (100 mg/ml y el ojo izquierdo se instiló con 200 µl de agua destilada. La inoculación se realizó diariamente por un periodo de 5 días consecutivos, no se observó ninguna manifestación de irritabilidad ocular en el ojo de los conejosFor the sub-chronic toxicity an aqueous preparation of Plantago major leaves was tested in 20 male NGP mice, with an average weight of 20.15 g and separated in two groups of ten individuals each. The dose used was 2000 mg/kg and the control group received 0.5 ml of distilled water. The extract administration was done daily during five days at week for a total period of 40 days. Signs of sub-chronic toxicity were observed in the days two and 12 of treatment. No significant change in corporal weight was observed. The ocular irritation was tested in five New Zeland male rabbits, with an average weight of 3.640 kg. The dose used was a 200 µl the preparation (100 mg/ml of Plantago major leaves, instill into the right eye and the control was used the left eye instill 200 µl of distilled water. The administration was done daily during five days. The extract shows no significant irritation during the

Mugwort (Artemisia L., nettle (Urtica L. and plantain (Plantago L. pollen in the atmosphere of Wrocław in the years 2002-2004

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Małgorzata Malkiewicz

2012-12-01

Full Text Available The paper includes the results of pollen season analysis of the selected plants (mugwort, nettle, plantain regarded as the most allergenic in Wrocław in 2002-2004. The studies were carried out using volumetric method (Burkard trap. The results show strong variation in pollen seasons. The average duration of the pollen season of Artemisia was 82 days. The highest pollen concentration of mugwort was recorded in 2004 (156 grains × m-3. The start of nettle pollen seasons varied in studied period on average by 24 days, on average, but its end was almost the same. The pollen season of Urtica was the earliest in 2004. It started on 5th May and lasted 136 days. The annual pollen total of Plantago was relatively low, on average 0.2-0.4% in annual pollen totals.

Histophatologic changes of lung in asthmatic male rats treated with hydro-alcoholic extract of plantago major and theophylline

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Farah Farokhi

2013-04-01

Full Text Available Objective: Plantago major (P. major is one of the medicinal crops in the world which has therapeutic properties for treatment of respiratory and gastrointestinal diseases. Theophylline is commonly used for the treatment of respiratory diseases. In this study, we investigated the protective effects of hydro-alcoholic extract of P. majoron lung in asthmatic male rats. Materials and Methods: 32 male adult rats were randomly divided into 4 groups: The control group (C received normal saline; Asthma (A group received a normal diet; Asthma group treated with Theophylline (200 mg/kg b.w. (T; Asthma group which received p.major (100 mg/kg b.w. (P. Asthma was induced by citric acid, 0.1 mg in form of spraying. The injection of P.major extract and theophylline was administered intraperitoneally for four weeks. At the end of the treatment, all of the rats were sacrificed and lungs were taken out, fixed, and stained with H&E, toluidine blue, and PAS, then histological studies were followed with light microscope. Results: Results showed that, in asthmatic group, the mean number of mast cells was significantly increased (p

The Antioxidant Capacities and Total Phenolic Contents of Some Medicinal Plants in Iran

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Ali Mirzaei

2011-12-01

Full Text Available Background & Objectives: Free radicals are highly reactive molecules may cause great damage to cell membranes and DNA and Result in inducing oxidation DNA mutations leading to cancer, degenerative, and other diseases. Plant antioxidant derived may be preventive of free radical damages. Methods & Materials: The Stems and flower sample of plants air-dried, finely ground and were extracted by ethanol: water (70:30 for 48 h. Extracts were filtered and dried under vacuum. The antioxidant activity of five ethanolic extract of medicinal plants (Descurainia Sophia, Plantago major, Trachyspermum copticum L, Coriandrum sativum and Trigonella foenum-graecum from Iran were analysed by five different methods [1,1-diphenyl-2-picrylhydrazyl (DPPH radical, 2,2,azinobis-3-ethylbenzthiazoline-6-sulphonic acid (ABTS radical cation, Ferric-reducing antioxidant power assay (FRAP, phosphomolybdenum (PMB and reducing power (RP]. In addition, for determination of antioxidant components total phenolic content was also analyzed. Results: The total phenolic content of medicinal plant ranges from 74 to 154.3 mg Gallic acid/g extract as measured by the Folin–Ciocalteau method. Values of DPPH varied from 15.5 to 19.6 µmol trolex/g. FRAP ranged from 124.2 to 753 µmol of Fe(II/g extract. Antioxidant activity of the Plantago major was always higher compared to the other plants extracts values of total phenols content and antioxidant capacity by DPPH, ABTS, FRAP, (154.33 mg GAE/g, 1856 µmol trolox, 750 µmol trolox and 1169 µmol of Fe(II/g, extract respectively. The range of total antioxidant activity by phosphomolybdenum method was 513.3 to 870 µmol trolox/g. The reducing ability of the tested extracts was between 0.31-1.26. Plantago majorwas also highest activity in both tests. Conclusion: This study clearly demonstrated that Plantago major crude extract exhibit significant antioxidant activity.

TRACE METAL CONTENT (Cu, Zn, Mn AND Fe) IN URTICA DIOICA L. AND PLANTAGO MAJOR L.

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Krolak, Elzbieta; Raczuk, Jolanta; Borkowska, Lidia

2016-11-01

The aim of the study was to compare the contents of Cu, Zn, Mn and Fe in the washed and unwashed leaves and roots of two plant species: Urica dioica L. and Plantago major L., used in herbal medicine. These two herb species occur in the same environmental habitats, yet their morphological structure is different. The soil and plant samples for analyses were collected from an uncontaminated area in Eastern Poland. In each habitat location, the samples were taken from sandy soils with slightly acidic and neutral pH values. The obtained results showed that U. dioica and P. major accumulated similar amounts of trace metals, such as: Cu, Zn and Fe, in leaves, despite the differences in the morphological structure of their overground parts. The content of Mn in leaves U. dioica was about twice as much as in P. major. Also, no differences in the metal content were observed between washed and unwashed leaves of both species. However, in the same habitat conditions, a significantly higher content of Cu, Zn and Mn was found in the roots of P. major than U. dioica. The content of Fe in the roots was similar in both species. P. major and U. dioica may be a valuable source of microelements, if they are obtained from unpolluted habitats.

B chromosome in Plantago lagopus Linnaeus, 1753 shows preferential transmission and accumulation through unusual processes

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Dhar, Manoj K.; Kour, Gurmeet; Kaul, Sanjana

2017-01-01

Abstract Plantago lagopus is a diploid (2n = 2x =12) weed belonging to family Plantaginaceae. We reported a novel B chromosome in this species composed of 5S and 45S ribosomal DNA and other repetitive elements. In the present work, presence of B chromosome(s) was confirmed through FISH on root tip and pollen mother cells. Several experiments were done to determine the transmission of B chromosome through male and female sex tracks. Progenies derived from the reciprocal crosses between plants with (1B) and without (0B) B chromosomes were studied. The frequency of B chromosome bearing plants was significantly higher than expected, in the progeny of 1B female × 0B male. Thus, the B chromosome seems to have preferential transmission through the female sex track, which may be due to meiotic drive. One of the most intriguing aspects of the present study was the recovery of plants having more chromosomes than the standard complement of 12 chromosomes. Such plants were isolated from the progenies of B chromosome carrying plants. The origin of these plants can be explained on the basis of a two step process; formation of unreduced gametes in 1B plants and fusion of unreduced gametes with the normal gametes or other unreduced gametes. Several molecular techniques were used which unequivocally confirmed similar genetic constitution of 1B (parent) and plants with higher number of chromosomes. PMID:28919970

Pengaruh Kemasaman, Suhu, dan Cahaya terhadap Golovinomyces sordidus Penyebab Penyakit Embun Tepung pada Plantago major

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Dini Florina

2014-11-01

Full Text Available Unidentified powdery mildew was found on leaves of a medicinal plant, Plantago major in Indonesia. The present studies were aimed to identify the causal fungal species of powdery mildew of  P. major and study the effect of acidity, temperature and light on the causal fungus. Identification was conducted by observing morphological characteristics of the fungus scraped from diseased leaves under light microscope. The infection process was observed by staining the inoculated leaves followed observation under light microscope. Conidia were suspended in various pH solutions to examine effect of pH on conidial germination and hyphal length. For testing effects of temperature on conidial germination and hyphal length, conidial suspensions were dropped onto glass slides then incubated in temperature ranges from 20–35 °C, the germinating conidia and length of the existing hypha were counted and measured 24 hours later. With the same method as above the glass slides were incubated in 25 °C either in the dark or exposed under illuminated white light tube (400 Lux for study effect of light on conidial germination. The causal fungus was identified as Golovinomyces sordidus (syn. Erysiphe sordida with its anamorph state as Oidium. The germinating conidia penetrate directly into leaf tissue within 24 hours. The optimal conditions for the conidia to germinate are pH between 4 and 7, temperature between 25 °C and 30 °C, and dark condition.  

Evaluation of Plantago major L. seed mucilage as a rate controlling matrix for sustained release of propranolol hydrochloride.

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Saeedi, Majid; Morteza-Semnani, Katayoun; Sagheb-Doust, Mehdi

2013-03-01

Polysaccharide mucilage derived from the seeds of Plantago major L. (family Plantaginaceae) was investigated for use in matrix formulations containing propranolol hydrochloride. HPMC K4M and tragacanth were used as standards for comparison. The hardness, tensile strength, and friability of tablets increased as the concentration of mucilage increased, indicating good compactibility of mucilage powders. The rate of release of propranolol hydrochloride from P. major mucilage matrices was mainly controlled by the drug/mucilage ratio. Formulations containing P. major mucilage were found to exhibit a release rate comparable to HPMC containing matrices at a lower drug/polymer ratio (drug/HPMC 2:1). These results demonstrated that P. major mucilage is a better release retardant compared to tragacanth at an equivalent content. The results of kinetic analysis showed that in F3 (containing 1:2 drug/mucilage) the highest correlation coefficient was achieved with the zero order model. The swelling and erosion studies revealed that as the proportion of mucilage in tablets was increased, there was a corresponding increase in percent swelling and a decrease in percent erosion of tablets. The DSC and FT-IR studies showed that no formation of complex between the drug and mucilage or changes in crystallinity of the drug had occurred.

Effects of Different Fertilizer Treatments on Quantitative and Qualitative Characteristics of Isabgol (Plantago ovata

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Gh. Asadi

2016-02-01

Full Text Available Application of organic manures is one of the most important strategies for plant nutrition compared to chemical fertilizers, especially in organic management of medicinal plants. In order to evaluate the effects of different organic and chemical fertilizers on yield, yield components and qualitative characteristics of isabgol (Plantago ovata, a field experiment was conducted based on randomized complete block design with three replications at the Agricultural Research Station, College of Agriculture, Ferdowsi University of Mashhad, during growing season of 2011-2012. Treatments included three levels of nitrogen fertilizer (25, 50 and 75 kg.ha-1, three levels of cow manure (5, 10 and 15 t.ha-1 and three levels of vermicompost (2, 4 and 6 t.ha-1 and control.The results showed that the effectof different fertilizers was significant (p≤0.05 on all studied traits except swelling rate of isabgol. The maximum amounts were observed in 6 t.ha-1 vermicompost and 15 t.ha-1 cow manure. The highest seed yield (548.4 kg.ha-1 was observed in 6 t.ha-1 vermicompost that it enhanced up to 26% compared to control. By increasing in organic fertilizers enhanced mucilage content, swelling factor and swelling content of isabgol. The maximum mucilage content and swelling factor were observed in 15 t.ha-1 (with 35.3% and 13.4 ml, respectively. Since, organic matters improved quantitative and qualitative yield of isabgol compared to chemical fertilizer, it concluded that these organic inputs could be regarded as a suitable alternative to enhance the growth and yield of medicinal plants such as isabgol especially in low input systems.

Accumulation of Pb, Cd and Zn from contaminated soil to various plants and evaluation of soil remediation with indicator plant (Plantago lanceolata L.)

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Zupan, M.; Lobnik, F.; Kadunc, V. [Ljubljana Univ. (Slovenia). Agronomy Dept., Center for Soil and Environmental Science; Hudnik, V. [National Institute of Chemistry Hajdrihova 19, Ljubljana (Slovenia)

1997-12-31

The accumulation of cadmium, lead, and zinc by different major cultivated plants from soils contaminated with heavy metals, is presented. The vegetables, crops, and the indicator plant narrow leaf plantain (Plantago lanceolata L.) were used in a field experiment including 3 areas with different levels of pollution. The highest concentrations of heavy metals were observed in edible green parts of vegetables (endive, spinach, lettuce) and roots (carrot, red beet, radish). The heavy metal content in leguminous plants (pods and seeds) was very low compared to high soil concentrations. Wheat and maize showed lower concentrations in grains and kernels than in green parts. Lime and vermiculite were used for reduction of Cd availability to plants in polluted soil. The Cd concentration decreased in the narrow leaf plantain in the presence of both lime and vermiculite in acid soil. In the higher-pH soil the Cd availability to spinach was greatly reduced in the presence of vermiculite

The female advantage in natural populations of gynodioecious Plantago coronopus: seed quantity vs. offspring quality.

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van der Meer, Sascha; Sebrechts, Thomas; Vanderstraeten, Sylvette; Jacquemyn, Hans

2017-12-01

In gynodioecious plant species, females can only persist when they have a reproductive advantage in comparison with hermaphrodites. However, several studies have shown that females do not necessarily produce more seeds than hermaphrodites, since seed production can be affected by population characteristics, such as female frequency or population size. The aim of this study was to quantify the female advantage across a large number of natural populations, examine its relationship with population sex ratio and size, and to assess the role of competition on the magnitude of the female advantage. We sampled 27 populations of Plantago coronopus (nuclear-cytoplasmic gynodioecy) along the Belgian and Dutch coast. In each population, we estimated population sex ratio and size, and assessed seed production per flower and seed production per plant. Subsequently, germination, growth, and competition experiments were performed in the greenhouse to determine the female advantage regarding offspring quality. Females produced fewer seeds per plant than hermaphrodites (FA = 0.90), and seed production was negatively related to female frequency. Since both sex morphs were equally affected by pollen availability, the female advantage was not related to population sex ratio. On the other hand, offspring of females showed higher germination and growth rates, resulting in higher competitive abilities when seeds of a female and a hermaphrodite were grown together. Overall, these results indicate that differences in competitive abilities between the offspring of females and hermaphrodites may have contributed to the maintenance of females in relatively high frequencies in populations of this short-lived gynodioecious plant species.

Bioassay-guided supercritical fluid extraction of cyclooxygenase-2 inhibiting substances in Plantago major L.

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Stenholm, A; Göransson, U; Bohlin, L

2013-02-01

Selective extraction of plant materials is advantageous for obtaining extracts enriched with desired constituents, thereby reducing the need for subsequent chromatography purification. Such compounds include three cyclooxygenase-2 (COX-2) inhibitory substances in Plantago major L. targeted in this investigation: α-linolenic acid (α-LNA) (18:3 ω-3) and the triterpenic acids ursolic acid and oleanolic acid. To investigate the scope for tuning the selectivity of supercritical fluid extraction (SFE) using bioassay guidance, and Soxhlet extraction with dichloromethane as solvent as a reference technique, to optimise yields of these substances. Extraction parameters were varied to optimise extracts' COX-2/COX-1 inhibitory effect ratios. The crude extracts were purified initially using a solid phase extraction (SPE) clean-up procedure and the target compounds were identified with GC-MS, LC-ESI-MS and LC-ESI-MS² using GC-FID for quantification. α-LNA was preferentially extracted in dynamic mode using unmodified carbon dioxide at 40°C and 172 bar, at a 0.04% (w/w) yield with a COX-2/COX-1 inhibitory effect ratio of 1.5. Ursolic and oleanolic acids were dynamically extracted at 0.25% and 0.06% yields, respectively, with no traces of (α-LNA) and a COX-2/COX-1-inhibitory effect ratio of 1.1 using 10% (v/v) ethanol as polar modifier at 75°C and 483 bar. The Soxhlet extracts had ursolic acid, oleanolic acid and αLNA yields up to 1.36%, 0.34% and 0.15%, respectively, with a COX-2/COX-1 inhibitory effect ratio of 1.2. The target substances can be extracted selectively by bioassay guided optimisation of SFE conditions. Copyright © 2012 John Wiley & Sons, Ltd.

Leaf anatomy of medicinal shrubs and trees from Misiones forest of the Paranaense Province (Argentina: Part 2 Anatomía foliar de arbustos y árboles medicinales de la Selva Misionera de la provincia Paranaense (Argentina: Parte 2

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Ana M. Arambarri

2008-07-01

Full Text Available The present paper contains the study of the second part of medicinal shrubs and trees from Paranaense province. Forty five species of shrubs and trees belonging to 29 families inhabiting Misiones forest of the Paranaense biogeographic province (Argentina have been cited with medicinal properties. The work provides illustrations of diagnostic characters and conclusions of the main botanical differential traits, such as the presence of crystaliferous epidermis (e.g. Trixis divaricata subsp. divaricata; stomata and trichomes types (e. g. ciclocytic stomata in Pilocarpus pennatifolius and scale peltate trichomes in Tabebuia heptaphylla; midvein transection outlines (e.g. midvein convex and keel-shaped on the adaxial side in Schinus weinmanniifolia; presence and types of crystals (e.g. crystal sand in Cordia ecalyculata, raphides in Psychotria carthagenensis. This paper also gives an ecological interpretation of the species studied which shows predominantly a combination of mesomorphic (e.g. hypostomatic leaves, dorsiventral mesophyll and xeromorphic leaf traits (e.g. thick cuticle, abundant sclerenchyma, multilayered epidermis, mesophyll formed exclusively by palisade parenchyma, multilayered hypodermis, presence of sclereids. Only two species (Ilex paraguariensis and Manihot grahamii have mesomorphic (e.g. hypostomatic leaves, dorsiventral mesophyll and hygromorphic leaf characters (e.g. epidermis glabrous. Finally, the work provides a key to distinguish 107 medicinal shrubs and trees from the Paranaense biogeographic province (Part 1: Gallery forests and Part 2: Misiones forest that permit identified species using anatomy leaf characteristics.El presente trabajo corresponde a la segunda entrega del estudio de arbustos y árboles medicinales de la provincia biogeografica Paranaense. En esta parte, se analizaron 45 especies contenidas en 29 familias que habitan la Selva Misionera y han sido citadas con propiedades medicinales. El trabajo se acompa

Plantas útiles en la medicina tradicional de Malpasito-Huimanguillo, Tabasco, México

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Edelia Claudina Villarreal-Ibarra

2015-07-01

Full Text Available En México las plantas medicinales son el recurso terapéutico por excelencia en la medicina tradicional, es rescatable en gran medida por constituir un importante elemento al combinar el conocimiento popular con el científi co para el tratamiento de diversas enfermedades en la atención primaria de la salud. El presente estudio documenta el conocimiento tradicional de las plantas medicinales en la comunidad de Malpasito, dentro de la Reserva Ecológica de Agua Selva en Huimanguillo, Tabasco, México. Se incluye un inventario de plantas medicinales de la región, información sobre el uso terapéutico, la forma de preparación y parte vegetal utilizada. La información se recabó mediante entrevistas estructuradas TRAMIL. Se registraron 128 especies de plantas medicinales empleadas en la comunidad distribuidas en 63 familias botánicas cuyas especies dominantes pertenence a: Asteraceae (10, Leguminosae y Lamiaceae (siete, Verbeneaceae (cinco, Rutaceae y Solanaceae (cuatro. Se reportan 13 especies medicinales con nivel de uso signifi cativo superior al 20%. Los usos medicinales se agruparon y clasifi caron en 17 categorías, en orden de prioridad: desórdenes del sistema digestivo, genitourinario y endócrino, seguidos de las infecciones y desórdenes del sistema respiratorio. Los resultados sugieren la necesidad de futuros estudios de valoración científica para las especies locales empleadas para el tratamiento de alguna enfermedad.

Effects of medicinal herbs "Plantago asiatica", "Houttuynia cordata" and "Mentha haplocalyx" on non-specific immune responses of cobia (Rachycentron canadum).

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Wu, Yu-Sheng; Chen, Yin-Yu; Ueng, Pien-Sheng; Nan, Fan-Hua

2016-11-01

This study investigated the effects of orally administered Plantago asiatica, Houttuynia cordata, and Mentha haplocalyx on the growth and nonspecific immune responses of cobia (Rachycentron canadum). The nonspecific immune parameters assessed were weight gain, feed conversion ratio, superoxide anion (O 2 - ) production, superoxide dismutase (SOD) activity, phagocytic rate, phagocytic index, lysozyme activity, serum albumin and globulin, and albumin:globulin (A/G) ratio. The growth experiment indicated that 6-week dietary treatments did not significantly affect on the growth of cobia. Nonspecific immune responses showed that O 2 - production, SOD and lysozyme activity, and phagocytosis were significantly increased after the oral administration of P. asiatica and H. cordata, and the serum albumin:globulin ratio (A/G) gradually decreased. In this study, treatment of the Mentha haplocalyx on the cobia didn't present with the inducing of the phagocytosis ability compared with the treatment of P. asiatica and H. cordata. We suggest that oral administration of the 10 g/kg or 20 g/kg of the P. asiatica and H. cordata is exactly inducing the phagocytosis, ROS production, lysozyme activity and SOD production in the cobia. Copyright © 2016 Elsevier Ltd. All rights reserved.

21 CFR 201.319 - Water-soluble gums, hydrophilic gums, and hydrophilic mucilloids (including, but not limited to...

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2010-04-01

... gum, kelp, methylcellulose, plantago seed (psyllium), polycarbophil tragacanth, and xanthan gum) as... gum, kelp, methylcellulose, plantago seed (psyllium), polycarbophil tragacanth, and xanthan gum) as..., methylcellulose, plantago seed (psyllium), polycarbophil, tragacanth, and xanthan gum. Esophageal obstruction and...

Evaluation of drug uptake and deactivation in plant: Fate of albendazole in ribwort plantain (Plantago laceolata) cells and regenerants.

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Stuchlíková Raisová, Lucie; Podlipná, Radka; Szotáková, Barbora; Syslová, Eliška; Skálová, Lenka

2017-07-01

Albendazole (ABZ) is a benzimidazole anthelmintic widely used especially in veterinary medicine. Along with other drugs, anthelmintics have become one of a new class of micro-pollutants that disturb the environment but the information about their fate in plants remains limited. The present study was designed to test the uptake and biotransformation of ABZ in the ribwort plantain (Plantago lancelota), a common meadow plant, which can come into contact with this anthelmintic through the excrements of treated animals in pastures. Two model systems were used and compared: cell suspensions and whole plant regenerants. In addition, time-dependent changes in occurrence of ABZ and its metabolites in roots, basal parts of the leaves and tops of the leaves were followed up. Ultrahigh-performance liquid chromatography coupled with high mass accuracy tandem mass spectrometry (UHPLC-MS/MS) led to the identification of 18 metabolites of ABZ formed in the ribwort. In both model systems, the same types of ABZ biotransformation reactions were found, but the spectrum and abundance of the ABZ metabolites detected in cell suspensions and regenerants differed significantly. Cell suspensions seem to be suitable only for qualitative estimations of drug biotransformation reactions while regenerants were shown to represent an adequate model for the qualitative as well as quantitative evaluation of drug uptake and metabolism in plants. Copyright © 2017. Published by Elsevier Inc.

Physiological characteristics of Plantago major under SO2 exposure as affected by foliar iron spray.

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Mohasseli, Vahid; Khoshgoftarmanesh, Amir Hossein; Shariatmadari, Hossein

2017-08-01

Sulfur dioxide (SO 2 ) is considered as a main air pollutant in industrialized areas that can damage vegetation. In the present study, we investigated how exposure to SO 2 and foliar application of iron (Fe) would affect certain physiological characteristics of Plantago major. The plant seedlings exposed or unexposed to SO 2 (3900 μg m -3 ) were non-supplemented or supplemented with Fe (3 g L -1 ) as foliar spray. Plants were exposed to SO 2 for 6 weeks in 100 × 70 × 70 cm chambers. Fumigation of plants with SO 2 was performed for 3 h daily for 3 days per week (alternate day). Lower leaf Fe concentration in the plants exposed to SO 2 at no added Fe treatment was accompanied with incidence of chlorosis symptoms and reduced chlorophyll concentration. No visible chlorotic symptoms were observed on the SO 2 -exposed plants supplied with Fe that accumulated higher Fe in their leaves. Both at with and without added Fe treatments, catalase (CAT) and peroxidase (POD) activity was higher in the plants fumigated with SO 2 in comparison with those non-fumigated with SO 2 . Foliar application of Fe was also effective in increasing activity of antioxidant enzymes CAT and POD. Exposure to SO 2 led to reduced cellulose but enhanced lignin content of plant leaf cell wall. The results obtained showed that foliar application of Fe was effective in reducing the effects of exposure to SO 2 on cell wall composition. In contrast to SO 2 , application of Fe increased cellulose while decreased lignin content of the leaf cell wall. This might be due to reduced oxidative stress induced by SO 2 in plants supplied with Fe compared with those unsupplied with Fe.

Plantas medicinais: transmissão do conhecimento nas famílias de agricultores de base ecológica no Sul do RS Plantas medicinales: transmisión de conocimientos en las familias de agricultores de base ecológica en el Sur de RS Medicinal plants: knowledge transmission in families of ecological farmers in souther Rio Grande do Sul

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Teila Ceolin

2011-03-01

Full Text Available O objetivo deste estudo foi investigar o processo de transmissão do conhecimento relacionado às plantas medicinais entre as gerações familiares, no contexto de agricultores de base ecológica da região sul do Rio Grande do Sul. Trata-se de um estudo qualitativo realizado com oito famílias de agricultores, totalizando 19 entrevistados, residentes nos municípios de Pelotas, Morro Redondo, Canguçu e Arroio do Padre, entre janeiro e maio de 2009. A análise dos dados foi realizada através do método hermenêutico-dialético. A família foi referida como a principal fonte na transmissão do conhecimento em relação às plantas medicinais. A maioria dos sujeitos informou primeiro realizar o tratamento com as plantas medicinais para em seguida buscar o serviço formal de saúde. A construção do conhecimento relacionado às plantas medicinais pelas famílias é predominantemente oral, realizada através do convívio diário entre seus membros e compartilhada com os demais membros da comunidade na qual estão inseridos.El objetivo de este estudio fue investigar el proceso de transmisión del conocimiento relacionado a las plantas medicinales, entre las generaciones familiares en el contexto de agricultores de base ecológica de la región sur de Rio Grande do Sul, Brasil. Se trató de un estudio cualitativo, el cual fue realizado con ocho familias de agricultores, totalizándose 19 entrevistados, residentes en los municipios de Pelotas, Morro Redondo, Canguçu y Arroio do Padre, en el período entre enero y mayo de 2009. El análisis de los datos fue realizado a través del método hermenéutico-dialéctico. La familia fue referida como principal fuente en la transmisión del conocimiento en relación a las plantas medicinales. La mayoría de los sujetos informó realizar primero tratamiento con las plantas medicinales, para luego acudir al servicio formal de salud. La construcción del conocimiento relacionado con las plantas medicinales por

Histophatologic changes of lung in asthmatic male rats treated with hydro-alcoholic extract of Plantago major and theophylline

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Farah Farokhi

2013-03-01

Full Text Available Objective: Plantago major (P. major is one of the medicinal crops in the world which has therapeutic properties for treatment of respiratory and gastrointestinal diseases. Theophylline is commonly used for the treatment of respiratory diseases. In this study, we investigated the protective effects of hydro-alcoholic extract of P. major on lung in asthmatic male rats. Materials and Methods: 32 male adult rats were randomly divided into 4 groups: The control group (C received normal saline; Asthma (A group received a normal diet; Asthma group treated with Theophylline (200 mg/kg b.w. (T; Asthma group which received p.major (100 mg/kg b.w. (P. Asthma was induced by citric acid, 0.1 mg in form of spraying. The injection of P.major extract and theophylline was administered intraperitoneally for four weeks. At the end of the treatment, all of the rats were sacrificed and lungs were taken out, fixed, and stained with H&E, toluidine blue, and PAS, then histological studies were followed with light microscope. Results: Results showed that, in asthmatic group, the mean number of mast cells was significantly increased (p<0.05. Thickness of alveolar epithelium and accumulation of glycoprotein in airways was increased. Moreover, in some of alveolar sac hemorrhaging was observed. Administration of p.major extract in asthmatic rats restored these changes towards normal group.Conclusion: The present study revealed that P. major compared with theophylline, has a protective effect on lung in asthmatic rats.

Anti-Tuberculosis Activity of Extract Ethyl Acetate Kenikir Leaves (Cosmos caudatus H.B.K and Sendok Leaves (Plantago Major L. By In Vitro Test

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Tatang Irianti

2018-04-01

Full Text Available The increasing therapy problem including multidrug-resistant tuberculosis (TB has made it important to discover a new anti-TB drug candidate. The aim of this study was to acknowledge the activity of ethyl acetate extracts of kenikir (Cosmos caudatus H.B.K and sendok (Plantago major L. leaves against Mycobacterium tuberculosis (M. tuberculosis H37Rv. This research used Middlebrook (MB 7H9 media and observed the growth of M. tuberculosis using Lowenstein Jensen (LJ media. The concentration of extracts were 0.25 mg/ml, 0.50 mg/ml, and 1.00 mg/ml. The result of this study showed that ethyl acetate extracts exhibited anti-TB activity in 1000 µg/ml of both extracts. The active compound group was detected by thin layer chromatography (TLC and the separation of compounds was shown by retardation factor (Rf and the color of the spots. Based on TLC chromatograms, it is known that there are types of compounds, such as ortho-dihydroxy compounds, phenolic compounds, and compound leads to terpenoids for both extracts.

Effect of chromium contaminated soil on arbuscular mycorrhizal colonisation of roots and metal uptake by Plantago lanceolata

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Estaun, V.; Cortes, A.; Velianos, K.; Camprubi, A.; Calvet, C.

2010-01-01

Industrial practices are the primary causes for the accumulation of chromium in the environment, an element considered as a toxic heavy metal when present in high concentrations. The beneficial contribution of arbuscular mycorrhizal fungi (AMF) to plant nutrition and growth has been acknowledged, however, results of heavy metal uptake by plants under mycorrhizal symbiosis vary. The AMF Glomus intraradices (BEG 72) was used with Plantago lanceolata as a host plant in three experiments. In the first one, devised to assess the plant tolerance to Cr(III) in the soil, four levels of chromium concentration were applied in a sterile soil mix, placed in pots with inoculated and non inoculated plant treatments. Plant survival, shoot weight and AMF root colonisation were measured. In the second experiment which was designed in order to determine the effect of the symbiosis on the chromium uptake, similar treatments were used, and in addition, the heavy metal plant tissue content was measured and the bioconcentration factors calculated. In the third experiment the chromium uptake from an industrial chromium waste contaminated soil was assessed using treatments with and without the AMF. Results showed that chromium has a severe impact on the survival of non inoculated plants, however, plants inoculated with AMF in moderately contaminated soil, perform in terms of growth and survival rate, as well as the non inoculated plants in soil with no chromium added, suggesting a buffering effect of the AMF by decreased intake of the toxic element in the roots and its translocation to the shoot. (Author) 28 refs.

Effect of chromium contaminated soil on arbuscular mycorrhizal colonisation of roots and metal uptake by Plantago lanceolata

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Estaun, V.; Cortes, A.; Velianos, K.; Camprubi, A.; Calvet, C.

2010-07-01

Industrial practices are the primary causes for the accumulation of chromium in the environment, an element considered as a toxic heavy metal when present in high concentrations. The beneficial contribution of arbuscular mycorrhizal fungi (AMF) to plant nutrition and growth has been acknowledged, however, results of heavy metal uptake by plants under mycorrhizal symbiosis vary. The AMF Glomus intraradices (BEG 72) was used with Plantago lanceolata as a host plant in three experiments. In the first one, devised to assess the plant tolerance to Cr(III) in the soil, four levels of chromium concentration were applied in a sterile soil mix, placed in pots with inoculated and non inoculated plant treatments. Plant survival, shoot weight and AMF root colonisation were measured. In the second experiment which was designed in order to determine the effect of the symbiosis on the chromium uptake, similar treatments were used, and in addition, the heavy metal plant tissue content was measured and the bioconcentration factors calculated. In the third experiment the chromium uptake from an industrial chromium waste contaminated soil was assessed using treatments with and without the AMF. Results showed that chromium has a severe impact on the survival of non inoculated plants, however, plants inoculated with AMF in moderately contaminated soil, perform in terms of growth and survival rate, as well as the non inoculated plants in soil with no chromium added, suggesting a buffering effect of the AMF by decreased intake of the toxic element in the roots and its translocation to the shoot. (Author) 28 refs.

Growth, respiration and nutrient acquisition by the arbuscular mycorrhizal fungus Glomus mosseae and its host plant Plantago lanceolata in cooled soil.

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Karasawa, T; Hodge, A; Fitter, A H

2012-04-01

Although plant phosphate uptake is reduced by low soil temperature, arbuscular mycorrhizal (AM) fungi are responsible for P uptake in many plants. We investigated growth and carbon allocation of the AM fungus Glomus mosseae and a host plant (Plantago lanceolata) under reduced soil temperature. Plants were grown in compartmented microcosm units to determine the impact on both fungus and roots of a constant 2.7 °C reduction in soil temperature for 16 d. C allocation was measured using two (13)CO(2) pulse labels. Although root growth was reduced by cooling, AM colonization, growth and respiration of the extraradical mycelium (ERM) and allocation of assimilated (13)C to the ERM were all unaffected; the frequency of arbuscules increased. In contrast, root respiration and (13)C content and plant P and Zn content were all reduced by cooling. Cooling had less effect on N and K, and none on Ca and Mg content. The AM fungus G. mosseae was more able to sustain activity in cooled soil than were the roots of P. lanceolata, and so enhanced plant P content under a realistic degree of soil cooling that reduced plant growth. AM fungi may therefore be an effective means to promote plant nutrition under low soil temperatures. © 2011 Blackwell Publishing Ltd.

Citotoxicidad de extractos de plantas medicinales sobre la línea celular de carcinoma de pulmón humano A549 Cytotoxicity of medicinal plant extracts on the human lung carcinoma cell line A549

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Alexis Díaz García

2011-03-01

Full Text Available OBJETIVO: evaluar el efecto de 10 extractos de plantas medicinales sobre el crecimiento de la línea celular humana de carcinoma de pulmón A549. METODOS: el efecto de los extractos sobre la células tumorales se midió a través de un ensayo colorimétrico mediante el empleo del bromuro de 3-(4,5-dimetil-tiazol-2-yl-2,5-difenil tetrazolio a concentraciones entre 3,9-250 µg/mL durante 72 h y se calculó la concentración citotóxica media para cada uno. RESULTADOS: del total de los extractos evaluados solo cuatro (Parthenium hysterophorus, Bixa orellana, Momordica charantia y Cucurbita maxima evidenciaron concentraciones citotóxicas medias inferiores a 100 µg/mL. Excepto Parthenium hysterophorus, las restantes se emplean en la medicina tradicional para el tratamiento del cáncer. Los extractos de Cecropia peltata, Melia azedarach, Annona glabra, Artemisia absintium, Lepidium virginicum y Bidens pilosa no mostraron efectos citotóxicos significativos. CONCLUSIONES: Los extractos de plantas que se emplean en la medicina tradicional para el tratamiento del cáncer, mostraron citotoxicidad sobre las células tumorales. El conocimiento etnobotánico representa una herramienta importante en la selección de plantas medicinales, en la búsqueda de nuevos compuestos para el tratamiento del cáncer.OBJECTIVES: to evaluate the effect of 10 Cuban medicinal plant extracts on the human lung tumor cell line A549. METHODS: the effect of the plant extracts on tumor cells was determined by a colorimetric assay using the 3-(4,5-Dimethylthiazol-2-yl-2,5-diphenyltetrazolium bromide (MTT at concentrations ranging from 3,9-250 µg/mL for 72 hours and the mean cytotoxic concentration was calculated for each of them. RESULTS: the ethanolic extracts of Parthenium hysterophorus, Bixa orellana, Momordica charantia and Cucurbita maxima showed mean cytotoxic concentrations under 100 µg/mL. Except for P. hysterophorus, the others are used in traditional medicine to fight

The Effects of Plantago major on the Activation of the Neutrophil Respiratory Burst

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Elaine Reina

2013-10-01

Full Text Available Plantago major is a common plant that grows worldwide in temperate zones and is found in fields, lawns, and on the roadsides. Its leaves and seeds have been used in almost all parts of the world for centuries as a wound healer, analgesic, antioxidant, and antibiotic, as well as an immune system modulator, antiviral, antifungal, and anti-inflammatory agent. Baicalein and aucubin are the two most biologically active components of P. major, and both have been shown to have antioxidant, anti-inflammatory, and anticancer properties. Neutrophils have a pivotal role in wound healing and inflammation. Their principal mechanism of host defense is the killing of pathogens via the production of reactive oxygen species (ROS. The aim of the present study was to determine the in vitro effects of P. major extract, baicalein, and aucubin on human neutrophil respiratory burst activity. The cytotoxicity of the agents was assessed by lactate dehydrogenase (LDH assays. A standard luminol-dependent chemiluminescence (CL assay was utilized to monitor the respiratory burst of the neutrophils after exposure to P. major extract and its two active ingredients, baicalein and aucubin. Three replicates per group were included in each of the three runs of the experiments and analysis of variance (ANOVA was used for statistical analysis. P. major and baicalein were not toxic to the cells at any of the concentrations examined. Aucubin was toxic to the cells only at the highest concentration tested (P=0.0081. However, genistein was toxic to the cells at all of the concentrations examined except for the lowest concentration of 16.9 μg/ml (P=0.985. P. major (−0.10±0.11, aucubin (0.06±0.16, baicalein (−0.10±0.11, and genistein (−0.18±0.07 all significantly (P<0.0001 inhibited ROS production from the neutrophils. P. major extract inhibited neutrophil ROS production, as did aucubin and baicalein. Therefore, these components should be investigated further with relation to

Experimental Paper. In vitro synthesis of mucilage in Plantago ovata Forsk affected by genotypes and culture media

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Golkar Pooran

2017-03-01

Full Text Available Introduction: Psyllium (Plantago ovata Forsk is medicinally used mainly for its mucilage content. Objective: In the present study, an attempt was made to improve mucilage yield under in vitro callus culture using different genotypes, explants and culture media. Methods: The effects of a range of concentrations of plant growth regulators including 2,4-dichlorophenoxyacetic acid (2,4-D and kinetin (Kin were evaluated on mucilage synthesis under in vitro culture using cotyledon, hypocotyl and seed explants. Fourteen genotypes originating from different geographical regions of Iran were used to evaluate their response to in vitro mucilage synthesis. Results: The highest rate of callus induction (76% and callus growth rate CGR (0.38 mm/day were induced on MS medium supplemented with 0.5 mg/l 2,4-D and 1 mg/l Kin and the hypocotyl explant. The results of analysis of variance showed significant genotypic differences for callus induction, CGR and mucilage content of callus and seeds. The mucilage content ranged from 0.38 to 0.08 (g/g DW and 0.13 to 0.042 (g/g DW for callus and seed, respectively. The superior callus induction (73%, CGR (0.45 mm/day and mucilage content of callus (0.38 g/g DW was denoted to Po1 genotype. The callus produced nearly three times more mucilage than the seeds using superior genotype (Po1. Conclusion: The results of this study revealed that high efficiency of callus culture of P. ovata using hypocotyl explant accompanied by the exploration of genetic diversity are important to improve the yield of mucilage synthesis by in vitro callus culture.

Evaluación in vitro de la actividad anti Trypanosoma cruzi de aceites esenciales de diez plantas medicinales

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Juan Rojas

2010-07-01

Full Text Available Objetivos: Determinar la actividad anti Trypanosoma cruzi in vitro de los aceites esenciales de 10 plantas medicinales. Además, determinar la actividad citotóxica de los aceites contra células de mamíferos y la actividad modulatoria de los aceites sobre el óxido nítrico. Diseño: Estudio experimental in vitro. Institución: Instituto de Investigaciones Clínicas e Instituto de Medicina Tropical, Facultad de Medicina, Universidad Nacional Mayor de San Marcos, Lima, Perú. Material biológico: Epimastigotes de Trypanosoma cruzi, células Raw 264.7, aceites esenciales de Mentha X piperita L (menta, Rosmarinus officinalis L (romero, Chenopodium ambrosioides L (paico, Eucaliptus globulus Labill (eucalipto, Artemisia absinthium L (ajenjo, Melissa officinalis L (toronjil, Minthostachys setosa Brig (muña, Cimbopogon citratus (hierba luisa, Aloysia triphylla (cedrón y Mentha spicata L (hierba buena. Método: La actividad tripanocida se evaluó contra epimastigotes cultivados en medio LIT, incubados por 48 horas a 37ºC en incubador humidificado con CO2 al 5%. El cristal violeta se utilizó como control positivo. La actividad citotóxica de los productos contra células mamíferas se evaluó en células RAW 264.7 y la actividad modulatoria de los compuestos sobre óxido nítrico también se determinó en los cultivos de células RAW 264.7. Principales medidas de resultados: Porcentaje de inhibición de viabilidad y CI50. Resultados: Los aceites esenciales de Cymbopogon citratus (hierba luisa y Aloysia triphylla (cedrón inhibieron significativamente el crecimiento de la forma epimastigote de T. cruzi, con una CI50 de 63,09 y 96,49 μg/mL, respectivamente. No hubo variaciσn significativa de la concentraciσn de óxido nítrico y tampoco se evidenció citotoxicidad. Conclusiones: Los aceites esenciales de Cymbopogon citratus y Aloysia triphylla mostraron actividad anti-Trypanosoma cruzi in vitro y no fueron citotóxicas para las células mamíferas.

Huerta del Rey: Edafic Characterization of a Historic Area of the Mercury Mining and Study of the Transfer of Mercury from the Soil to Plantago Major; Huerta del Rey: Caracterizacion Edafica de una Zona Historica de la Mineria del Mercurio y Estudio de la Transferencia del Mercurio a Plantago Major

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Suarez, C; Manero, L; Sierra, M J; Rodriguez-Alonso, M; Millan, R

2013-02-01

The main objective of this scientific-technical report is to carry out a characterization of study plot called Huerta del Rey in the mercury (Hg) mining district of Almaden. For this goal, an edaphic characterization has been performed and the Hg behavior in the soil study has been evaluated. Then, total Hg concentration and easily available Hg for plants have been determined and the absorption and distribution of Hg in Plantago major L (typical specie from the study area) have been studied. The results showed that the total Hg concentrations in the soil ranged from 530 {+-} 32 mg kg{sup -}1 to 4300 {+-} 339 mg kg{sup -}1 even to 12378 {+-} 1051mg kg{sup -}1. It is in accordance with the normal values measured in a Hg mining area. Otherwise, the percentage of soluble Hg in soil with respect to the total Hg concentration is low (< 0.3 %) although if concentration instead of percentage is taking into account, the soluble Hg reached values up to 1.33 {+-}0.14 mg kg{sup -}1 that could mean a potential risk of pollution of groundwater by leaching process. Finally a brief description about different technologies for decreasing Hg concentration in the study soil, including phytoremediation, has been performed. (Author) 96 refs.

Conhecimento e uso de plantas medicinais por usuários de duas unidades básicas de saúde

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Diego Florêncio Lima

2014-01-01

Full Text Available El objetivo fue verificar conocimiento y uso de plantas medicinales entre usuarios de dos Unidades de Salud Familiar. Estudio cuantitativo, llevado a cabo entre junio y agosto de 2010, en Sinop, Mato Grosso, Brasil. Se utilizó guía de entrevista estructurada, a la que participaron 302 personas de ambos los sexos, que señalaron 77 plantas utilizadas para el tratamiento de varias enfermedades; sólo 7,67% no utilizaban plantas medicinales. Sin embargo, fueron descritas 10 plantas más citadas, la parte utilizada de cada una y su preparación. Sólo 0,9% de la población entrevistada adquirieron informaciones acerca de tales plantas con profesionales de la salud. Es necesario invertir en iniciativas que promuevan mayor integración de la utilización de plantas medicinales en los programas desarrollados en las Unidades de Salud de la Familia, así como mayor formación de estos profesionales, mediante la incorporación de contenidos que incluyen las hierbas medicinales en los cursos de graduación.

Huerta del Rey: Edafic Characterization of a Historic Area of the Mercury Mining and Study of the Transfer of Mercury from the Soil to Plantago Major

International Nuclear Information System (INIS)

Suarez, C.; Manero, L.; Sierra, M. J.; Rodriguez-Alonso, M.; Millan, R.

2013-01-01

The main objective of this scientific-technical report is to carry out a characterization of study plot called Huerta del Rey in the mercury (Hg) mining district of Almaden. For this goal, an edaphic characterization has been performed and the Hg behavior in the soil study has been evaluated. Then, total Hg concentration and easily available Hg for plants have been determined and the absorption and distribution of Hg in Plantago major L (typical specie from the study area) have been studied. The results showed that the total Hg concentrations in the soil ranged from 530 ± 32 mg kg - 1 to 4300 ± 339 mg kg - 1 even to 12378 ± 1051mg kg - 1. It is in accordance with the normal values measured in a Hg mining area. Otherwise, the percentage of soluble Hg in soil with respect to the total Hg concentration is low ( - 1 that could mean a potential risk of pollution of groundwater by leaching process. Finally a brief description about different technologies for decreasing Hg concentration in the study soil, including phytoremediation, has been performed. (Author) 96 refs.

Effect of drought stress and sulphur fertilizer on quantity and quality yield of psyllium (Plantago ovata L. in Baluchestan

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M. Mousavi nik

2016-05-01

Full Text Available Management of chemical fertilizers application is very important issues on environment and plant yield especially in arid and-semi arid region. In order to determine the effects of drought stresses and fertilizer levels on quantity and quality yields of psyllium (Plantago ovata L., a study was conducted as split plot based on randomized complete block design with four replications at the Natural Resources and Agriculture Researches Center of Balouchestan, Iran, during growing season of 2009-2010. Treatments included different irrigation regimes (three, five and eight times irrigation during the growing season as main plots and four levels of sulphur fertilizer (0, 75, 150 and 225 kg.ha-1 sulphur as sub plot. The results showed that the irrigation regimes and sulphur fertilizer had significant effects on seed and biological yield of psyllium, so the highest seed and biological yields obtained in eight times irrigation. Also, the maximum of these factors were achieved in 225 kg.ha-1 sulphur. The highest harvest index and 1000- seed weight, No. seed per spike and No. spike per plant were observed in eight times irrigation and 225 kg.ha-1 sulphur. The highest plant height was obtained in eight times irrigation and 225 kg.ha-1 sulphur and the maximum mucilage percentage and proline content were obtained in three times irrigation. The maximum mucilage yield and carbohydrate content were achieved in eight times irrigation. Among sulphur fertilizer, the highest amounts for all factors were achieved in 225 kg.ha-1 sulphur. There was positive and significant correlation between seed yield with spike No. per plant, Seed No. per spike, 1000-Seed, biological yield and mucilage yield.

Uso de plantas medicinais por pessoas com hipertensão

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Marília Gabrielle Santos Nunes

2015-01-01

Full Text Available Objetivo: describir el uso de plantas medicinales en el tratamiento de la hipertensión arterial por personas con hipertensión inscritas en el Programa de Salud Familiar en una ciudad del interior de Pernambuco. Métodos: estudio descriptivo, cuyos datos se obtuvieron a través de guía de entrevistas semiestructuradas aplicada a 172 pacientes. Resultados: el uso de plantas medicinales para el control de la hipertensión fue informado por 39,5%, de los cuales 57,4% utiliza sólo una planta medicinal. Entre las especies citadas predominó el uso de chayote [Sechium edule (Jacq. Sw.-34.8%]. Conclusión: plantas medicinales constituyen terapia coadyuvante en el tratamiento de hipertensión, sin embargo requiere monitoreo del manejo y de las especies seleccionadas.

Investigating genetic diversity and habitat dynamics in Plantago brutia (Plantaginaceae), implications for the management of narrow endemics in Mediterranean mountain pastures.

Science.gov (United States)

De Vita, A; Bernardo, L; Gargano, D; Palermo, A M; Peruzzi, L; Musacchio, A

2009-11-01

Many factors have contributed to the richness of narrow endemics in the Mediterranean, including long-lasting human impact on pristine landscapes. The abandonment of traditional land-use practices is causing forest recovery throughout the Mediterranean mountains, by increasing reduction and fragmentation of open habitats. We investigated the population genetic structure and habitat dynamics of Plantago brutia Ten., a narrow endemic in mountain pastures of S Italy. Some plants were cultivated in the botanical garden to explore the species' breeding system. Genetic diversity was evaluated based on inter-simple sequence repeat (ISSR) polymorphisms in 150 individuals from most of known stands. Recent dynamics in the species habitat were checked over a 14-year period. Flower phenology, stigma receptivity and experimental pollinations revealed protogyny and self-incompatibility. With the exception of very small and isolated populations, high genetic diversity was found at the species and population level. amova revealed weak differentiation among populations, and the Mantel test suggested absence of isolation-by-distance. Multivariate analysis of population and genetic data distinguished the populations based on genetic richness, size and isolation. Landscape analyses confirmed recent reduction and isolation of potentially suitable habitats. Low selfing, recent isolation and probable seed exchange may have preserved P. brutia populations from higher loss of genetic diversity. Nonetheless, data related to very small populations suggest that this species may suffer further fragmentation and isolation. To preserve most of the species' genetic richness, future management efforts should consider the large and isolated populations recognised in our analyses.

Males y remedios II : la evolución de la medicina en la Historia del Mundo Griego

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Pilar Fernández Uriel

1996-01-01

Full Text Available Este trabajo es un análisis de la ciencia médica en el Mundo Griego, a través de sus profesionales y de los medios utilizados (medicamentos, plantas medicinales, utensilios, etc..., en su contexto social, religioso y, sobre todo, en las circunstancias culturales e históricas en que se desarrolló la ciencia médica en la antigua Grecia.Analysis of the medical science in the Greek World, of its professionals and the means used (medicines, medical plants, tools etc.. in its social, religious context and among all, the cultural and historical circunstances in which the medical science was developed.

Optimizaión de un protocolo para el cultivo in vitro y la micropropagación masiva del llantén (Plantago major

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Giovanni Garro M.

2009-01-01

Full Text Available Llantén (P. major posee propiedades medicinales antiinflamatorias y cicatrizantes que han sido aprovechadas en muchas latitudes desde épocas remotas. Los estudios del cultivo in vitro de esta especie son escasos, a pesar de las ventajas que este tipo de técnicas presenta en especies de uso medicinal. En este trabajo se logró desarrollar un protocolo para el establecimiento y la reproducción masiva in vitro del llantén. Se estableció un protocolo de desinfección de semillas y se obtuvo plántulas germinadas in vitro que se utilizaron como fuente de explantes para la fase de micropropagación masiva. Se evaluó el cultivo de ápices en medios de cultivo con sales y vitaminas de M & S (1962 al 100% y al 50%, suplementados con los siguientes reguladores de crecimiento: 1,2mg/l de ANA (Ácido naftalenacético, 0,6 mg/l y 0,4 mg/l de BAP (Bencil amino purina y 1mg/l de TDZ (Tidiazurón en diferentes combinaciones. Los mejores resultados en la inducción de brotes fueron obtenidos en 14,9 brotes promedio por explante en el medio con las sales y vitaminas M & S (1962 reducidas al 50% de su concentración y sin reguladores de crecimiento. Con este tratamiento, un total de 150 vitroplantas provenientes de distintos tratamientos han sido llevadas a condiciones de invernadero con un 100% de sobrevivencia.

Medicina popular: benefícios e malefícios das plantas medicinais Medicina popular: benefícios y malefícios de las plantas medicinales Popular medicine: benefits and drawbacks of medicinal plants

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Inácia Sátiro Xavier de França

2008-04-01

Full Text Available Estudo descritivo objetivando verificar se os herbolários oferecem as informações corretas para a utilização das plantas medicinais; se orientam os clientes acerca das possíveis intoxicações ou interação com os alopáticos; e se utilizam critérios para a comercialização dos fitoterápicos. Utilizou-se um questionário contendo questões abertas e fechadas envolvendo aspectos da atuação dos herbolários com os fitoterápicos. Os herbolários conhecem a maioria das plantas medicinais, entretanto, há lacunas acerca da indicação correta desses produtos, dos efeitos colaterais e toxicidade. Os herbolários carecem conhecer melhor os princípios ativos das ervas, as indicações terapêuticas, orientar os usuários acerca das possíveis interações farmacológicas ou intoxicações medicamentosas e a respeito da limpeza, armazenamento, tempo de vida útil e contra-indicações do produto.Estudio descriptivo con los objetivos de verificar se los herbolarios ofrecen las informaciones correctas para la utilización de las plantas medicinales; se orientan los clientes acerca de las posibles intoxicaciones o interaciones con los alopáticos y se utilizan critérios para la comercialización de los fitoterápicos. Se utilizó una encuesta conteniendo preguntas subjetivas y también objetivas tratando de aspectos de la actuación de los herbolarios con los fitoterápicos. Los herbolarios conocen la mayoría de las plantas medicinales, por lo tanto, hay huecos acerca de la indicación correcta de esos productos, de los efectos colaterales y de la toxicidad. Esos profesionales carecen conocer mejor los princípios activos de las hierbas, las indicaciones terapeuticas, orientar los usuários sobre las posibles interacciones farmacológicas o intoxicaciones medicamentosas y a respeto de puntos como limpieza, armazenamiento, tiempo de vida útil y contra-indicaciones del producto.Descriptive study which aims to verify if the herbalist offer the

AGUA, SALUD Y SOCIEDAD EN LA SIERRA DE GUADARRAMA, 1890-1936. EL MANANTIAL DE AGUAS MINERO-MEDICINALES DE LA PORQUERIZA Y EL BALNEARISMO EN GUADARRAMA (COMUNIDAD DE MADRID

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Miguel Ángel Soto Caba

2015-01-01

Full Text Available La explotación y uso medicinal de los manantiales de la localidad de Guadarrama (Comunidad de Madrid se desarrolló durante el primer tercio del siglo XX, cuando en esta localidad se construyeron balnearios, colonias y centros de salud, en un contexto de cambios en la organización del sistema de salud y de implantación de las ideas defendidas por médicos higienistas y del movimiento Regeneracionista. En torno al manantial de La Porqueriza se constituyó una colonia veraniega, formada principalmente por miembros de la burguesía madrileña, con modos de vida saludables que apreciaba las propiedades medicinales del agua, el aire y el paisaje de la Sierra de Guadarrama en contraposición de los problemas sanitarios de la urbe madrileña.Abstract: The exploitation and use of medicinal springs in the town of Guadarrama (Community of Madrid occurred during the first third of the twentieth century, when resorts, colonies, and health centers were built, in a context of changes in the health system organization and the implementation of ideas then defended by hygienists doctors and regenerationists. Around the La Porqueriza spring a summer colony was formed, consisting mainly of members of the bourgeoisie of Madrid, who practiced healthy lifestyles and appreciated the medicinal properties of water, air and the landscape of the Sierra de Guadarrama which contrasted with health problems of Madrid.

Effect of organic fertilizers on quality and quantity characteristics of blond psyllium (Plantago ovata Forssk. clasping peperweed (Lepidium perfoilatum L., qodumeh Shirazi (Alyssum homolocarpum L. and dragon's head (Lalementia iberica L.

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A. Koocheki

2016-05-01

Full Text Available This experiment was carried out in experimental farm of Agricultural Faculty of Ferdowsi University of Mashhad, Iran during 2010. The design was split plot with three replications. Main plots were the medicinal plant species consist of: blond psyllium (Plantago ovate Forssk., clasping peperweed (Lepidium perfoilatum L., qodumeh Shirazi (Alyssum homolocarpum L. dragon's head (Lalementia iberica L. and subplots were various organic fertilizer consist of cow manure, vermicompost (based on cow manure, coffee compost and spent mushroom compost. Results showed that medicinal plants had significant difference for number of seeds per plant, shoot dry matter, seed yield, plant height and mucilage percentage. Effect of various organic matter on all traits except for 1000-seed weight was significant. Interaction of organic fertilizers and plant was significant for dry matter. Lalementia had the most mucilage percentage (27.75% and cow manure was the best fertilizer because it had the highest amounts of dry matter (1816 kg.ha-1, seed yield (467.5 kg.ha-1, number seed per plant (550 seeds.plant-1, plant height (23.17 cm and mucilage percentage (20.75%.

Kwaliteitsnormen Medicinale Cannabis

NARCIS (Netherlands)

Slijkhuis C; Hoving R; Blok-Tip L; Kaste D de; KCF

2004-01-01

Medicinal Cannabis can be legally supplied by pharmacists to patients from the first of September 2003, although still only on prescription. The quality of this product is tested conform the monograph Cannabis flos. In this monograph tests and quality standards, such as characteristics, loss on

A novel strategy for target profiling analysis of bioactive phenylethanoid glycosides in Plantago medicinal plants using ultra-performance liquid chromatography coupled with tandem quadrupole mass spectrometry.

Science.gov (United States)

Qi, Meng; Xiong, Aizhen; Geng, Fang; Yang, Li; Wang, Zhengtao

2012-06-01

Phenylethanoid glycosides are a group of phenolic compounds with diverse biological activities such as hypotensive, diuretic, and hypoglycemic effects. In this study, a target profiling analysis approach using ultra-performance liquid chromatography coupled with tandem quadrupole mass spectrometry (MS) was established on the basis of parent ion scanning for m/z 161, the characteristic product ion for phenylethanoid glycosides. It was successfully employed to discriminate the chemical composition of phenylethanoid glycosides between Plantaginis Herba and Plantaginis Semen, two medicinal parts of Plantago plants, which are widely used as herbal medicine in China. Totally, 34 phenylethanoid glycosides were characterized and tentatively identified by their retention times, MS, and tandem quadrupole MS (MS/MS) data. Combined with chemometrics analysis of principal component analysis and orthogonal projection to latent structural discriminate analysis, eight of them, especially acteoside and plantamajoside, were picked out and contributed to the chemical distinction between Plantaginis Herba and Plantaginis Semen, which might be responsible for the differences in diuretic and hypotensive effects between the two medicinal parts. This new approach for target profiling provides not only a novel idea for specific analysis of active chemical constituents in the same type, but also a promising and reference method for quality evaluation of traditional Chinese medicines. © 2012 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.

Ácidos grasos, actividad antioxidante y antibacterial en extractos de verdolaga. (Portulaca Oleracea)

OpenAIRE

Moncayo Espín, Cristian Roberto

2015-01-01

Desde tiempos prehistóricos las plantas medicinales han sido utilizadas para el tratamiento de diversas afecciones. Estas plantas han sido objeto de un sin número de investigaciones con el fin de encontrar propiedades antioxidantes, antimicrobianas y antimutagénicas. Portulaca oleracea o verdolaga, es una hierba nativa, rica en ácidos grasos omega3 y vitaminas, que ha sido usada con fines medicinales. En el Ecuador, un país rico en biodiversidad, se han encontrado dos especies endémicas perte...

LOS ENDOCANABINOIDES: UNA OPCIÓN TERAPÉUTICA PARA EL TRATAMIENTO DEL CÁNCER

OpenAIRE

MAYORGA N, Fabio; CÁRDENAS S, Rosa H

2009-01-01

Los avances científicos en el campo de la química y de la medicina se han apropiado la inquietud popular que desde hace muchos años utiliza los recursos que ofrece la naturaleza. La planta Cannabis sativa ha sido tradicionalmente utilizada con propósitos medicinales, así como con fines recreativos. Sin embargo, sus importantes efectos psicoactivos han constituido una limitante para su uso. Algunos gobiernos han comenzado a permitir su uso de forma controlada, con fines medicinales. El descubr...

Sustratos orgánicos como alternativa para la producción de albahaca (Ocimum Selloi Benth)

OpenAIRE

Campos Mota, Lilián; Flores Sánchez, Diego

2013-01-01

La especie de albahaca Ocimum Selloi Benth ha sido empleada en México por sus propiedades medicinales y como condimento. Por otra parte, el uso de vermicomposta es una alternativa en la producción orgánica de las plantas medicinales; por lo tanto, esta investigación tuvo como objetivo evaluar el efecto de la vermicomposta en el crecimiento de albahaca. Como tratamientos se emplearon 4 sustratos: 1) vermicomposta de café (con base a pulpa proveniente del beneficio húmedo) más cascarilla de caf...

Use of Plantago major seed mucilage as a novel edible coating incorporated with Anethum graveolens essential oil on shelf life extension of beef in refrigerated storage.

Science.gov (United States)

Behbahani, Behrooz Alizadeh; Shahidi, Fakhri; Yazdi, Farideh Tabatabaei; Mortazavi, Seyed Ali; Mohebbi, Mohebbat

2017-01-01

In this study, Plantago major seed mucilage (PMSM) was extracted from whole seeds using hot-water extraction (HWE). The dill (D) essential oil components were identified through gas chromatography (GC) and gas chromatography/mass spectrometry (GC/MS) and its antioxidant properties were examined through the methods of 2,2-diphenyl-1-picrylhydrazyl (DPPH), ferric reducing antioxidant potential (FRAP) and ß-carotene-linoleic acid assay (B-CL). Total phenolic content (TPC) was characterized through the Folin-Ciocalteu method and the antimicrobial effect was evaluated on 10 pathogenic microorganisms. PMSM edible coating incorporated were prepared in four different concentrations of essential oils, including 0, 0.5, 1 and 1.5% (w/w). The control and the coated beef samples were analyzed periodically for microbiological (total viable count, psychrotrophic count, Escherichia coli, Staphylococcus aureus and fungi), chemical (thiobarbituric acid, peroxide value and pH), and sensory characteristics. The IC 50 , FRAP, B-CL and TPC of the dill essential oil were equal to 11.44μg/ml, 9.45mmol/g, 82.86 and 162.65μg/ml GAE, respectively. PMSM extended the microbial shelf life of beef by 3days, whereas the PMSM+0.5%D, PMSM+1%D and PMSM+1.5%D resulted in a significant shelf life extension of the beef by 6, 9 and 9days, respectively, as compared to the control samples. Copyright © 2016 Elsevier B.V. All rights reserved.

Photosynthesis and biochemical responses to elevated O3 in Plantago major and Sonchus oleraceus growing in a lowland habitat of northern China.

Science.gov (United States)

Su, Benying; Zhou, Meihua; Xu, Hong; Zhang, Xiujie; Li, Yonggeng; Su, Hua; Xiang, Bao

2017-03-01

A field experiment was carried out to compare the responses to ozone (O 3 ) in two common herbaceous plant species, Plantago major L. and Sonchus oleraceus L., by building open-top growth chambers in situ to simulate O 3 stress (+O 3 , 85±5ppb, 9hr/day for 30days) in a lowland habitat in Inner Mongolia, Northern China. Responses to O 3 of gas exchange, chlorophyll a fluorescence, leaf pigment content, antioxidant capability, soluble protein content, membrane lipid peroxidation and dark respiration (R d ) were analyzed. Results showed that elevated O 3 exposure significantly reduced the light-saturated net photosynthesis (P Nsat ), stomatal conductance (g s ) and transpiration rate (E) in both species. Although non-significant interactive effect between species and O 3 on P Nsat was analyzed, the reduction in P Nsat in S. oleraceus might be due primarily to the higher fraction of close PSII reaction centers and impaired activities of plant mesophyll cells as evidences by decreased maximum efficiency of PSII photochemistry after dark adapted state (F v /F m ) and unchanged intercellular CO 2 concentration (C i ). Besides, biochemical analysis showed that S. oleraceus had lower antioxidant ability compared to P. major. As a result, S. oleraceus was damaged to the larger extent in terms of lipid peroxidation and visible O 3 injury, indicating that S. oleraceus was more sensitive to O 3 than P. major. Our results indicated that wild herbaceous plant species growing in a lowland habitat in sandy grassland were sensitive to O 3 stress and S. oleraceus can be considered as one of the bio-indicators for high O 3 concentration in semi-arid grassland of northern China. Copyright © 2016. Published by Elsevier B.V.

Essential oil of some seasonal flowering plants grown in Saudi Arabia

OpenAIRE

S.A. Al-Mazroa; L.H. Al-Wahaibi; A.A. Mousa; H.Z. Al-Khathlan

2015-01-01

The constituents of the essential oils of Rumex vesicarius, Erucaria hispanica, Schimpera arabica, Savignya parviflora, Horwoodia dicksoniae, Sisymbrium irio, Plantago amplexicaulis, Plantago boissieri, Arnebia linearifolia, Foeniculum vulgare, Trigonella hamosa, Lotus halophilus, Reseda muricata, Cenchrus ciliaris is reported. These oils were analyzed by GC/MS and most of them are being studied for the first time.

Essential oil of some seasonal flowering plants grown in Saudi Arabia

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S.A. Al-Mazroa

2015-03-01

Full Text Available The constituents of the essential oils of Rumex vesicarius, Erucaria hispanica, Schimpera arabica, Savignya parviflora, Horwoodia dicksoniae, Sisymbrium irio, Plantago amplexicaulis, Plantago boissieri, Arnebia linearifolia, Foeniculum vulgare, Trigonella hamosa, Lotus halophilus, Reseda muricata, Cenchrus ciliaris is reported. These oils were analyzed by GC/MS and most of them are being studied for the first time.

Aproximación a las Epístolas de Giovanni Manardo

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Valderas, José María

1997-12-01

Full Text Available Up until Manardo's entry into science, most botanical research had been based on Plinian expurgated texts. This began lo change in the 1520s. Manardo's Epistolae Medicinales were a pathbreaking investigations of plants. Dioscorides is now the source.

Las Epistolae medicinales de Manardo suponen el final de una botánica fundada en la depuración de los textos de Plinio, perdurante hasta finales del siglo XV, y el comienzo de una línea basada en el conocimiento de Dioscórides, curso que seguirán los grandes naturalistas del siglo XVI.

Horizontal acquisition of multiple mitochondrial genes from a parasitic plant followed by gene conversion with host mitochondrial genes

Science.gov (United States)

2010-01-01

Background Horizontal gene transfer (HGT) is relatively common in plant mitochondrial genomes but the mechanisms, extent and consequences of transfer remain largely unknown. Previous results indicate that parasitic plants are often involved as either transfer donors or recipients, suggesting that direct contact between parasite and host facilitates genetic transfer among plants. Results In order to uncover the mechanistic details of plant-to-plant HGT, the extent and evolutionary fate of transfer was investigated between two groups: the parasitic genus Cuscuta and a small clade of Plantago species. A broad polymerase chain reaction (PCR) survey of mitochondrial genes revealed that at least three genes (atp1, atp6 and matR) were recently transferred from Cuscuta to Plantago. Quantitative PCR assays show that these three genes have a mitochondrial location in the one species line of Plantago examined. Patterns of sequence evolution suggest that these foreign genes degraded into pseudogenes shortly after transfer and reverse transcription (RT)-PCR analyses demonstrate that none are detectably transcribed. Three cases of gene conversion were detected between native and foreign copies of the atp1 gene. The identical phylogenetic distribution of the three foreign genes within Plantago and the retention of cytidines at ancestral positions of RNA editing indicate that these genes were probably acquired via a single, DNA-mediated transfer event. However, samplings of multiple individuals from two of the three species in the recipient Plantago clade revealed complex and perplexing phylogenetic discrepancies and patterns of sequence divergence for all three of the foreign genes. Conclusions This study reports the best evidence to date that multiple mitochondrial genes can be transferred via a single HGT event and that transfer occurred via a strictly DNA-level intermediate. The discovery of gene conversion between co-resident foreign and native mitochondrial copies suggests

Horizontal acquisition of multiple mitochondrial genes from a parasitic plant followed by gene conversion with host mitochondrial genes

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Hao Weilong

2010-12-01

Full Text Available Abstract Background Horizontal gene transfer (HGT is relatively common in plant mitochondrial genomes but the mechanisms, extent and consequences of transfer remain largely unknown. Previous results indicate that parasitic plants are often involved as either transfer donors or recipients, suggesting that direct contact between parasite and host facilitates genetic transfer among plants. Results In order to uncover the mechanistic details of plant-to-plant HGT, the extent and evolutionary fate of transfer was investigated between two groups: the parasitic genus Cuscuta and a small clade of Plantago species. A broad polymerase chain reaction (PCR survey of mitochondrial genes revealed that at least three genes (atp1, atp6 and matR were recently transferred from Cuscuta to Plantago. Quantitative PCR assays show that these three genes have a mitochondrial location in the one species line of Plantago examined. Patterns of sequence evolution suggest that these foreign genes degraded into pseudogenes shortly after transfer and reverse transcription (RT-PCR analyses demonstrate that none are detectably transcribed. Three cases of gene conversion were detected between native and foreign copies of the atp1 gene. The identical phylogenetic distribution of the three foreign genes within Plantago and the retention of cytidines at ancestral positions of RNA editing indicate that these genes were probably acquired via a single, DNA-mediated transfer event. However, samplings of multiple individuals from two of the three species in the recipient Plantago clade revealed complex and perplexing phylogenetic discrepancies and patterns of sequence divergence for all three of the foreign genes. Conclusions This study reports the best evidence to date that multiple mitochondrial genes can be transferred via a single HGT event and that transfer occurred via a strictly DNA-level intermediate. The discovery of gene conversion between co-resident foreign and native

Etnobotanica y usos de las plantas de la comunidad rural de Sogamoso, Boyacá, Colombia

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Manuel Galvis Rueda

2017-09-01

Full Text Available Se investigó el uso de plantas medicinales entre los habitantes de Sogamoso, población agraria en el departamento de Boyacá, Colombia,  donde campesinos en sus huertos y paisajes de zona andina y páramo preservan y usan una alta diversidad de plantas, manteniendo una cultura de saberes tradicionales,  para el  tratamiento de enfermedades humanas o de uso etno-veterinario; aprovechando así los beneficios que conlleva la conservación, para preservar y utilizar especies registradas. La metodología desarrollada fue una investigación de acción participativa, donde se realizaron  encuestas de tipo específico a 100 personas, quienes expresaron tener un uso de las plantas medicinales. Se incluyó la caracterización ecológica de la zona elegida, comprendiendo las  microcuencas de río Monquirá  y río Cusiana, donde los recursos in-situ fueron inventariados con la comunidad, recopilándose fotografías,  usos de las plantas nativas, exóticas  o cultivadas en huertos. Como resultado se obtuvo la descripción a nivel botánico, ecológico, climático, así como las prácticas para la conservación o siembra, inventariándose  más de 178 especies, en 55 familias con sus respectivos usos medicinales y formas de preparación, incluyendo la categorización de plantas frías, calientes, de aplicaciones externas o de elaboración de productos. Se  recopilo el saber popular y se rescató el uso tradicional de plantas medicinales nativas que poseen los mayores o abuelos y que es transmitido de generación en generación.

Synthesis and characterisation of Cu(II), Ni(II), Mn(II), Zn(II) and VO(II ...

Indian Academy of Sciences (India)

Unknown

Synthesis and characterisation of Cu(II), Ni(II), Mn(II), Zn(II) and VO(II) Schiff base complexes derived from o-phenylenediamine and acetoacetanilide. N RAMAN*, Y PITCHAIKANI RAJA and A KULANDAISAMY. Department of Chemistry, VHNSN College, Virudhunagar 626 001, India e-mail: ra_man@123india.com.

Estudio etnobotánico de especias, plantas aromáticas y medicinales utilizadas en La Molana, Atrato-Chocó, Colombia: Bases para la conservación de la biodiversidad

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Miller Marmolejo Liloy

2018-01-01

Full Text Available Se realizó la caracterización y análisis de los sistemas productivos de plantas aromáticas, medicinales y condimentarias (PAMC de La Molana, Atrato-Chocó, Colombia a través de la identificación de sus características biofísicas, socioeconómicas y financieras, con el fin de proponer alternativas agroecológicas que solucionen los problemas y necesidades identificados en dichos sistemas; aplicando las metodologías e indicadores de evaluación de sistemas agrícolas hacia el desarrollo sostenible, Diseño, implementación y evaluación de arreglos agroforestales, Sistemas Agroforestales acompañado del análisis DOFA, y planificación agroforestal de unidades productivas (PAF, dicha información fue recopilada a través de la aplicación de un taller focal y cuestionarios semiestructurados a 40 productores. Se caracterizaron ocho unidades productivas (UP, cuatro parcelas y cuatro azoteas, a través de un muestreo aleatorio simple sin reposición. Los resultados señalan que estos productores destinan 15.6 ha a la producción de PAMC, de las cuales 11 ha son de cultivos en parcelas dentro de bosques y 4.6 ha son destinadas a cultivos en azoteas alrededor de las viviendas. Las unidades producen en promedio, 110 unidades (manojos semanales que son ofrecidos a vendedores informales en la plaza de mercado de Quibdó-Chocó, Colombia a precios que van desde COP $1000 hasta COP $3000 de acuerdo al tamaño y la especie. De igual modo se determinó que los ingresos económicos de las UP de PAMC dependen principalmente de las siguientes especies sembradas en las parcelas: Cilantro (Coriandrum sativum L., cimarrón (Eryngium foetidum L., Albahaca (Ocimum basilicum L. y Orégano (Origanum vulgare L., las cuales son las especies de mayor importancia económica en la zona de estudio.

Hypoglycemic and Hypolipidemic Potential of a High Fiber Diet in Healthy versus Diabetic Rabbits

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Raquel Díez

2013-01-01

Full Text Available The aim of this study was to investigate potential hypoglycaemic and hypolipidemic effects of Plantago ovata husk included in the diet, in healthy and diabetic rabbits. We also examined the effects of this fiber in other biochemical parameters. Two groups of 18 rabbits were used. The first group was fed with standard chow and the second with chow supplemented with Plantago ovata husk (3.5 mg/kg/day. On day 14 diabetes mellitus was induced by the intravenous administration of alloxan (80 mg/kg. After an oral glucose load (3 g, glucose, insulin, and other biochemical parameters were determined on day 14 (healthy rabbits and on day 28 (diabetic rabbits. In healthy rabbits, fiber did not modify glucose or insulin levels but decreased significantly total cholesterol, LDL-cholesterol, atherogenic index, and glycosylated hemoglobin. In diabetic rabbits, fiber was more beneficial in mild diabetics than in severe diabetics with significant decreases in glucose levels and increases in insulin concentrations. In these animals fiber caused an important reduction in cholesterol, indicating a beneficial effect of Plantago ovata husk in diabetic rabbits. Although further studies in patients are necessary, we think that Plantago ovata husk offers interesting perspectives to be administered to patients with diabetes mellitus.

Biologically active new Fe(II, Co(II, Ni(II, Cu(II, Zn(II and Cd(II complexes of N-(2-thienylmethylenemethanamine

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C. SPÎNU

2008-04-01

Full Text Available Iron(II, cobalt(II, nickel (II, copper (II, zinc(II and cadmium(II complexes of the type ML2Cl2, where M is a metal and L is the Schiff base N-(2-thienylmethylenemethanamine (TNAM formed by the condensation of 2-thiophenecarboxaldehyde and methylamine, were prepared and characterized by elemental analysis as well as magnetic and spectroscopic measurements. The elemental analyses suggest the stoichiometry to be 1:2 (metal:ligand. Magnetic susceptibility data coupled with electronic, ESR and Mössbauer spectra suggest a distorted octahedral structure for the Fe(II, Co(II and Ni(II complexes, a square-planar geometry for the Cu(II compound and a tetrahedral geometry for the Zn(II and Cd(II complexes. The infrared and NMR spectra of the complexes agree with co-ordination to the central metal atom through nitrogen and sulphur atoms. Conductance measurements suggest the non-electrolytic nature of the complexes, except for the Cu(II, Zn(II and Cd(II complexes, which are 1:2 electrolytes. The Schiff base and its metal chelates were screened for their biological activity against Escherichia coli, Staphylococcus aureus and Pseudomonas aeruginosa and the metal chelates were found to possess better antibacterial activity than that of the uncomplexed Schiff base.

Contribution to the study of radio toxicity of aromatic and medicinal plants using solid state nuclear track detectors; Contribution a l etude de la radio toxicite des plantes aromatiques et medicinales au moyen des detecteurs solides de traces nucleaires

Energy Technology Data Exchange (ETDEWEB)

Mortassim, A; Misdaq, M A; Naaman, A

2009-07-01

The concentrations of uranium (238 U), thorium (232 Th), radon (222 Rn) and thoron (220 Rn) were measured in twenty aromatic and medicinal plants in {sup f}ind a new method based on using solid state nuclear track detectors type Cr-39 and Rs-115. He emerges from this study that the verbena and salvia have higher levels of uranium (radon) higher than that of other plants while the leaves of olive and saturja have concentrations of thorium (thoron) higher than other plants therefore radio toxicity of these plants is higher than that of others and may pose a radiological hazard if the masses are incorporated by consumers high. [French] Les concentrations en uranium (238U), thorium (232Th), radon (222Rn), et thoron (220Rn) ont ete mesurees dans vingt plantes aromatiques et medicinales en utilsant une nouvelle methode basee sur l utilisation des detecteurs solides de traces nucleaires de types CR-39 et LR-115. Il en sort de cette etude que la verveine et la salvia presentent des teneurs en uranium (radon) superieurs a celle des autres plantes alors que les feuilles d olivier et la saturja presentent des concentrations en thorium (thoron) plus elevee que celles des autres plantes par consequent la radio toxicite de ces plantes est superieure a celles des autres et peuvent presenter un risque radiologique si les masses incorporees par les consommateurs sont elevees.

Complexes of cobalt(II), nickel(II), copper(II), zinc(II), cadmium(II) and dioxouranium(II) with thiophene-2-aldehydethiosemicarbazone

International Nuclear Information System (INIS)

Singh, Balwan; Misra, Harihar

1986-01-01

Metal complexes of thiosemicarbazides have been known for their pharmacological applications. Significant antitubercular, fungicidal and antiviral activities have been reported for thiosemicarbazides and their derivatives. The present study describes the systhesis and characterisation of complexes of Co II , Cu II , Zn II ,Cd II and UO II with thiosemicarbazone obtained by condensing thiophene-2-aldehyde with thiosemicarbazide. 17 refs., 2 tables. (author)

Mn(II), Zn(II) and VO(II) Schiff

Indian Academy of Sciences (India)

Home; Journals; Journal of Chemical Sciences; Volume 113; Issue 3. Synthesis and characterisation of Cu(II), Ni(II), Mn(II), Zn(II) and VO(II) Schiff base complexes derived from o-phenylenediamine and acetoacetanilide. N Raman Y Pitchaikani Raja A Kulandaisamy. Inorganic Volume 113 Issue 3 June 2001 pp 183-189 ...

BIOMONITORING OF URBAN AREA BY ANATOMICAL LEAF CHANGES

Directory of Open Access Journals (Sweden)

Elena IRIZA

2012-01-01

Full Text Available Plants play a vital role as indicators of pollution. The automobile emissions are high particularly at the traffic intersections. Plants growing under the stress of air pollution show differences in leaf surface characteristics. Light microscopic studies of leaf surface revealed an increase in the number of stomata and trichomes of polluted populations in comparison to control populations of Plantago major and Plantago lanceolata. These changes can be considered as indicators of environmental stress.

Species-specific effects of live roots and shoot litter on soil decomposer abundances do not forecast plant litter-nitrogen uptake

DEFF Research Database (Denmark)

Saj, Stéphane; Mikola, Juha; Ekelund, Flemming

2009-01-01

and bacterial- and fungal-feeding nematodes did not differ between the live plants, litter-N uptake differed, with Holcus being the most efficient compared to Plantago and Lotus. Hence, although microbes and their feeders unquestionably control N mineralization in the soil, and their growth differs among plant......Plant species produce litter of varying quality and differ in the quality and quantity of compounds they release from live roots, which both can induce different decomposer growth in the soil. To test whether differences in decomposer growth can forecast the amount of N species acquire from plant...... litter, as suggested by theory, we grew individuals of three grassland plants-Holcus lanatus, Plantago lanceolata and Lotus corniculatus-in soils into which (15)N-labelled litter of either Holcus, Plantago or Lotus was added. We measured the effects of live roots and litter of each species on soil...

Adsorption of Pb(II), Cu(II), Cd(II), Zn(II), Ni(II), Fe(II), and As(V) on bacterially produced metal sulfides.

Science.gov (United States)

Jong, Tony; Parry, David L

2004-07-01

The adsorption of Pb(II), Cu(II), Cd(II), Zn(II), Ni(II), Fe(II) and As(V) onto bacterially produced metal sulfide (BPMS) material was investigated using a batch equilibrium method. It was found that the sulfide material had adsorptive properties comparable with those of other adsorbents with respect to the specific uptake of a range of metals and, the levels to which dissolved metal concentrations in solution can be reduced. The percentage of adsorption increased with increasing pH and adsorbent dose, but decreased with increasing initial dissolved metal concentration. The pH of the solution was the most important parameter controlling adsorption of Cd(II), Cu(II), Fe(II), Ni(II), Pb(II), Zn(II), and As(V) by BPMS. The adsorption data were successfully modeled using the Langmuir adsorption isotherm. Desorption experiments showed that the reversibility of adsorption was low, suggesting high-affinity adsorption governed by chemisorption. The mechanism of adsorption for the divalent metals was thought to be the formation of strong, inner-sphere complexes involving surface hydroxyl groups. However, the mechanism for the adsorption of As(V) by BPMS appears to be distinct from that of surface hydroxyl exchange. These results have important implications to the management of metal sulfide sludge produced by bacterial sulfate reduction.

The effects of mineral nitrogen limitation, competition, arbuscular mycorrhiza, and their respective interactions, on morphological and chemical plant traits of Plantago lanceolata.

Science.gov (United States)

Pankoke, Helga; Höpfner, Ingo; Matuszak, Agnieszka; Beyschlag, Wolfram; Müller, Caroline

2015-10-01

Plants are sessile organisms that suffer from a multitude of challenges such as abiotic stress or the interactions with competitors, antagonists and symbionts, which influence their performance as well as their eco-physiological and biochemical responses in complex ways. In particular, the combination of different stressors and their impact on plant biomass production and the plant's ability to metabolically adjust to these challenges are less well understood. To study the effects of mineral nitrogen (N) availability, interspecific competition and the association with arbuscular mycorrhizal fungi (AMF) on biomass production, biomass allocation patterns (root/shoot ratio, specific leaf area) and metabolic responses, we chose the model organism Plantago lanceolata L. (Plantaginaceae). Plants were grown in a full factorial experiment. Biomass production and its allocation patterns were assessed at harvest, and the influence of the different treatments and their interactions on the plant metabolome were analysed using a metabolic fingerprinting approach with ultra-high performance liquid chromatography coupled with time-of-flight-mass spectrometry. Limited supply of mineral N caused the most pronounced changes with respect to plant biomass and biomass allocation patterns, and altered the concentrations of more than one third of the polar plant metabolome. Competition also impaired plant biomass production, yet affected the plant metabolome to a much lesser extent than limited mineral N supply. The interaction of competition and limited mineral N supply often caused additive changes on several traits. The association with AMF did not enhance biomass production, but altered biomass allocation patterns such as the root/shoot ratio and the specific leaf area. Interestingly, we did not find significant changes in the plant metabolome caused by AMF. A targeted analysis revealed that only limited mineral N supply reduced the concentrations of one of the main target defence

Synthesis and spectroscopic studies of biologically active tetraazamacrocyclic complexes of Mn(II, Co(II, Ni(II, Pd(II and Pt(II

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Monika Tyagi

2014-01-01

Full Text Available Complexes of Mn(II, Co(II, Ni(II, Pd(II and Pt(II were synthesized with the macrocyclic ligand, i.e., 2,3,9,10-tetraketo-1,4,8,11-tetraazacycoletradecane. The ligand was prepared by the [2 + 2] condensation of diethyloxalate and 1,3-diamino propane and characterized by elemental analysis, mass, IR and 1H NMR spectral studies. All the complexes were characterized by elemental analysis, molar conductance, magnetic susceptibility measurements, IR, electronic and electron paramagnetic resonance spectral studies. The molar conductance measurements of Mn(II, Co(II and Ni(II complexes in DMF correspond to non electrolyte nature, whereas Pd(II and Pt(II complexes are 1:2 electrolyte. On the basis of spectral studies an octahedral geometry has been assigned for Mn(II, Co(II and Ni(II complexes, whereas square planar geometry assigned for Pd(II and Pt(II. In vitro the ligand and its metal complexes were evaluated against plant pathogenic fungi (Fusarium odum, Aspergillus niger and Rhizoctonia bataticola and some compounds found to be more active as commercially available fungicide like Chlorothalonil.

Effect of Cu(II), Cd(II) and Zn(II) on Pb(II) biosorption by algae Gelidium-derived materials.

Science.gov (United States)

Vilar, Vítor J P; Botelho, Cidália M S; Boaventura, Rui A R

2008-06-15

Biosorption of Pb(II), Cu(II), Cd(II) and Zn(II) from binary metal solutions onto the algae Gelidium sesquipedale, an algal industrial waste and a waste-based composite material was investigated at pH 5.3, in a batch system. Binary Pb(II)/Cu(II), Pb(II)/Cd(II) and Pb(II)/Zn(II) solutions have been tested. For the same equilibrium concentrations of both metal ions (1 mmol l(-1)), approximately 66, 85 and 86% of the total uptake capacity of the biosorbents is taken by lead ions in the systems Pb(II)/Cu(II), Pb(II)/Cd(II) and Pb(II)/Zn(II), respectively. Two-metal results were fitted to a discrete and a continuous model, showing the inhibition of the primary metal biosorption by the co-cation. The model parameters suggest that Cd(II) and Zn(II) have the same decreasing effect on the Pb(II) uptake capacity. The uptake of Pb(II) was highly sensitive to the presence of Cu(II). From the discrete model it was possible to obtain the Langmuir affinity constant for Pb(II) biosorption. The presence of the co-cations decreases the apparent affinity of Pb(II). The experimental results were successfully fitted by the continuous model, at different pH values, for each biosorbent. The following sequence for the equilibrium affinity constants was found: Pb>Cu>Cd approximately Zn.

Physicochemical properties of 3,4,5-trimethoxybenzoates of Mn(II, Co(II, Ni(II and Zn(II

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W. FERENC

2005-09-01

Full Text Available The complexes of Mn(II, Co(II, Ni(II, Cu(II and Zn(II with 3,4,5-trimethoxybenzoic acid anion of the formula: M(C10H11O52·nH2O, where n = 6 for Ni(II, n = 1 for Mn(II, Co(II, Cu(II, and n = 0 for Zn, have been synthesized and characterized by elemental analysis, IR spectroscopy, X–ray diffraction measurements, thermogravimetry and magnetic studies. They are crystalline compounds characterized by various symmetry. They decompose in various ways when heated in air to 1273 K. At first, they dehydrate in one step and form anhydrous salts. The final products of decomposition are oxides of the respective metals (Mn2O3, Co3O4, NiO, CuO, ZnO. The solubilities of the analysed complexes in water at 293 K are in the orders of 10-2 – 10-4 mol dm-3. The magnetic susceptibilities of the Mn(II, Co(II, Ni(II and Cu(II complexes were measured over the range of 76–303 K and the magnetic moments were calculated. The results show that the 3,4,5-trimethoxybenzoates of Mn(II, Co(II and Ni(II are high-spin complexes but that of Cu(II forms a dimer [Cu2(C10H11O54(H2O2]. The carboxylate groups bind as monodentate or bidentate chelating or bridging ligands.

2018-02-17T14:34:50Z https://www.ajol.info/index.php/all/oai oai:ojs ...

African Journals Online (AJOL)

Coker, HAB; Faculty of Pharmacy, University of Lagos, Idi-Araba, P. M. B. 12003, Lagos, Nigeria Anticonvulsant activity; medicinal plants; picrotoxin; Schumanniophyton magnificum; strychnine; activité anticonvulsante ;plante medicinales ; picrotoxine; Schumanniophyton magnificium; strychnine Schumanniophyton ...

Synthesis and spectral studies of manganese(II), cobalt(II), nickel(II), copper(II), zinc(II), cadmium(II) and mercury(II) complexes of 4-oxo-4H-1-benzopyran-3-carboxaldehyde hydrazone derivatives

International Nuclear Information System (INIS)

Nawar, N.; Khattab, M.A.; Bekheit, M.M.; El-Kaddah, A.H.

1996-01-01

A few complexes of Mn(II), Co(II), Ni(II), Cu(II), Zn(II), Cd(II) and Hg(II) with 4-oxo-4H-1-benzopyran-3-(carboxaldehyde-4-chlorobenzylhydrazone) (BCBH) and 4-oxo-4H-1-benzopyran-3-(carboxaldehyde-4-methylbenzylhydrazone) (BMBH) have been synthesised and characterized by elemental analysis, molar conductivities, magnetic measurements and infrared (IR) and visible spectral studies. The IR spectra show that BCBH and BMBH behave as bidentate ligands either in the keto or enol form. (author). 24 refs., 2 tabs

Synthesis, Characterization, and Biological Activity of Mn(II, Fe(II, Co(II, Ni(II, Cu(II, Zn(II, and Cd(II Complexes of N-Thiophenoyl-N′-Phenylthiocarbohydrazide

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M. Yadav

2013-01-01

Full Text Available Mn(II, Fe(II, Co(II, Ni(II, Cu(II, Zn(II, and Cd(II complex of N-thiophenoyl -N′-phenylthiocarbohydrazide (H2 TPTH have been synthesized and characterized by elemental analysis, magnetic susceptibility measurements, infrared, NMR, electronic, and ESR spectral studies. The complexes were found to have compositions [Mn(H TPTH2], [Co(TPTH (H2O2], [Ni(TPTH (H2O2], [Cu(TPTH], [Zn(H TPTH], [Cd(H TPTH2], and [Fe(H TPTH2(EtOH]. The magnetic and electronic spectral studies suggest square planar geometry for [Cu(TPTH], tetrahedral geometry for [Zn(TPTH] and [Cd(H TPTH2], and octahedral geometry for rest of the complexes. The infrared spectral studies of the 1 : 1 deprotonated complexes suggest bonding through enolic oxygen, thiolato sulfur, and both the hydrazinic nitrogens. Thus, H2TPTH acts as a binegative tetradentate ligand. H2 TPTH and its metal complexes have been screened against several bacteria and fungi.

Chemical speciation of Pb(II, Cd(II, Hg(II, Co(II, Ni(II, Cu(II and Zn(II binary complexes of l-methionine in 1,2-propanediol-water mixtures

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M. Padma Latha

2007-04-01

Full Text Available Chemical speciation of Pb(II, Cd(II, Hg(II, Co(II, Ni(II, Cu(II and Zn(II complexes of L-methionine in 0.0-60 % v/v 1,2-propanediol-water mixtures maintaining an ionic strength of 0.16 M at 303 K has been studied pH metrically. The active forms of ligand are LH2+, LH and L-. The predominant species detected are ML, MLH, ML2, ML2H, ML2H2 and MLOH. Models containing different numbers of species were refined by using the computer program MINIQUAD 75. The best-fit chemical models were arrived at based on statistical parameters. The trend in variation of complex stability constants with change in the dielectric constant of the medium is explained on the basis of electrostatic and non-electrostatic forces.

cobalt (ii), nickel (ii)

African Journals Online (AJOL)

DR. AMINU

Department of Chemistry Bayero University, P. M. B. 3011, Kano, Nigeria. E-mail: hnuhu2000@yahoo.com. ABSTRACT. The manganese (II), cobalt (II), nickel (II) and .... water and common organic solvents, but are readily soluble in acetone. The molar conductance measurement [Table 3] of the complex compounds in.

Plant–plant interactions mediate the plastic and genotypic response of Plantago asiatica to CO2: an experiment with plant populations from naturally high CO2 areas

Science.gov (United States)

van Loon, Marloes P.; Rietkerk, Max; Dekker, Stefan C.; Hikosaka, Kouki; Ueda, Miki U.; Anten, Niels P. R.

2016-01-01

Background and Aims The rising atmospheric CO2 concentration ([CO2]) is a ubiquitous selective force that may strongly impact species distribution and vegetation functioning. Plant–plant interactions could mediate the trajectory of vegetation responses to elevated [CO2], because some plants may benefit more from [CO2] elevation than others. The relative contribution of plastic (within the plant’s lifetime) and genotypic (over several generations) responses to elevated [CO2] on plant performance was investigated and how these patterns are modified by plant–plant interactions was analysed. Methods Plantago asiatica seeds originating from natural CO2 springs and from ambient [CO2] sites were grown in mono stands of each one of the two origins as well as mixtures of both origins. In total, 1944 plants were grown in [CO2]-controlled walk-in climate rooms, under a [CO2] of 270, 450 and 750 ppm. A model was used for upscaling from leaf to whole-plant photosynthesis and for quantifying the influence of plastic and genotypic responses. Key Results It was shown that changes in canopy photosynthesis, specific leaf area (SLA) and stomatal conductance in response to changes in growth [CO2] were mainly determined by plastic and not by genotypic responses. We further found that plants originating from high [CO2] habitats performed better in terms of whole-plant photosynthesis, biomass and leaf area, than those from ambient [CO2] habitats at elevated [CO2] only when both genotypes competed. Similarly, plants from ambient [CO2] habitats performed better at low [CO2], also only when both genotypes competed. No difference in performance was found in mono stands. Conclusion The results indicate that natural selection under increasing [CO2] will be mainly driven by competitive interactions. This supports the notion that plant–plant interactions have an important influence on future vegetation functioning and species distribution. Furthermore, plant performance was mainly

Ontwikkeling van een FAST-LC methode voor een aantal nitrofuranen in vlees en melk

NARCIS (Netherlands)

Anonymous,

1985-01-01

Door toepassing van het zogenaamde "FAST-LC systeem" kunnen monsters zonder veel manuele handelingen automatisch worden geanalyseerd op nitrofuranen, medicinale stoffen met een breed werkingsspectrum, toegepast tegen infectieziekten bij runderen, varkens en pluimvee. In de Verenigde Staten mogen

Early root overproduction not triggered by nutrients decisive for competitive success belowground.

Directory of Open Access Journals (Sweden)

Francisco M Padilla

Full Text Available Theory predicts that plant species win competition for a shared resource by more quickly preempting the resource in hotspots and by depleting resource levels to lower concentrations than its competitors. Competition in natural grasslands largely occurs belowground, but information regarding root interactions is limited, as molecular methods quantifying species abundance belowground have only recently become available.In monoculture, the grass Festuca rubra had higher root densities and a faster rate of soil nitrate depletion than Plantago lanceolata, projecting the first as a better competitor for nutrients. However, Festuca lost in competition with Plantago. Plantago not only replaced the lower root mass of its competitor, but strongly overproduced roots: with only half of the plants in mixture than in monoculture, Plantago root densities in mixture were similar or higher than those in its monocultures. These responses occurred equally in a nutrient-rich and nutrient-poor soil layer, and commenced immediately at the start of the experiment when root densities were still low and soil nutrient concentrations high.Our results suggest that species may achieve competitive superiority for nutrients by root growth stimulation prior to nutrient depletion, induced by the presence of a competitor species, rather than by a better ability to compete for nutrients per se. The root overproduction by which interspecific neighbors are suppressed independent of nutrient acquisition is consistent with predictions from game theory. Our results emphasize that root competition may be driven by other mechanisms than is currently assumed. The long-term consequences of these mechanisms for community dynamics are discussed.

The Effect of Isabgol (Plantago psyllium Mucilage and Shiraz Thyme Essential Oils on Microbial Load and Improving Shelf Life of Fresh-Cut Carrot

Directory of Open Access Journals (Sweden)

M. Azizi

2016-02-01

Full Text Available Introduction: Fresh-cut produce graduated to retail during the1990s, especially for lettuce, cabbage, carrots and other similar vegetables. The high microbial loads of these products after harvest can be substantially reduced through a cleaning in flowing chlorinated water and adistribution under ensured controlledrefrigeration. Therefore, a good number of convenient ready-to-use greens were launched to the market in the past decade. Nowadays, theuse of this technology to achieve similar results in fruit products is one of the most challengingtargets for processors. However, there is anumber of issues that still need to beovercomebeforefresh-cut fruit commodities can be sparked off to anoutstanding position in the segment of lightly-treatedrefrigerated foods. The importance of freshly cut products increases day by day. Tissue and cell rupture leads to a decrease in the shelf life of these products. On the other hand, these products due to increased enzyme activity, respiration rate and microbiological considerations that affect the health of these productsrequires highly attention.To increase the shelf life of the products and prevent undesirable changes in cut slices of fruit or vegetables a coating on the surface of these products has been suggested. Mucilages and essential oils of herbs are natural compounds that can be used to create such covers. The advantages of these coatings are their bactericidal effect, maintenanceof pleasant taste and other physical and chemical characteristics of the product and even decrease of environmental pollution. In this research, the effect of natural compounds such as Zataria multiflora essential oil (EO and Plantagopsyllium mucilage on storage life and microbial load of fresh cut carrot was studied. Materials and Methods: The research was conducted in two separate experiments on fresh-cut carrot: In the first experiment, the effect of different concentrations of Plantago psyllium mucilage (0,100, 200, and

Cr(III,Mn(II,Fe(III,Co(II,Ni(II,Cu(II and Zn(II Complexes with Diisobutyldithiocarbamato Ligand

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Mohammad Tarique

2011-01-01

Full Text Available The synthesis of sulphur and nitrogen containing dithiocarbamato ligand derived from diisobutylamine as well as its coordination compounds with 3d series transition metals is presented. These synthesized compounds were characterized on the basis of elemental analysis, conductometric measurements and IR spectral studies. The analytical data showed the stoichiometry 1:2 and 1:3 for the compounds of the types ML2 {M=Mn(II, Co(II, Ni(II, Cu(II and Zn(II} and M'L3{M'=Cr(III and Fe(III} respectively. The conductometric measurements proved the non-electrolytic behaviour of all the compounds. The bidentate nature of dithiocarbamato moiety was confirmed on the basis of IR spectral data.

Resúmenes Conferencias Magistrales

Directory of Open Access Journals (Sweden)

Editor Gabriel Vargas Arana

2015-12-01

Full Text Available En este artículo se pueden encontrar los resúmenes de las conferencias magistrales del III Congreso Latinoamericano de Plantas Medicinales, desarrollado del 12 al 14 de agosto de 2015 en la ciudad de Iquitos, Perú.

Resúmenes Presentaciones Orales

Directory of Open Access Journals (Sweden)

Editor Gabriel Vargas Arana

2015-12-01

Full Text Available En este artículo se pueden encontrar los resúmenes de las presentaciones orales del III Congreso Latinoamericano de Plantas Medicinales, desarrollado del 12 al 14 de agosto de 2015 en la ciudad de Iquitos, Perú.

Computer augumented modelling studies of Pb(II, Cd(II, Hg(II, Co(II, Ni(II, Cu(II and Zn(II complexes of L-glutamic acid in 1,2-propanediol–water mixtures

Directory of Open Access Journals (Sweden)

MAHESWARA RAO VEGI

2008-12-01

Full Text Available Chemical speciation of Pb(II, Cd(II, Hg(II, Co(II, Ni(II, Cu(II and Zn(II complexes of L-glutamic acid was studied at 303 K in 0–60 vol. % 1,2-propanediol–water mixtures, whereby the ionic strength was maintained at 0.16 mol dm-3. The active forms of the ligand are LH3+, LH2 and LH–. The predominant detected species were ML, ML2, MLH, ML2H and ML2H2. The trend of the variation in the stability constants with changing dielectric constant of the medium is explained based on the cation stabilizing nature of the co-solvents, specific solvent–water interactions, charge dispersion and specific interactions of the co-solvent with the solute. The effect of systematic errors in the concentrations of the substances on the stability constants is in the order alkali > > acid > ligand > metal. The bioavailability and transportation of metals are explained based on distribution diagrams and stability constants.

Synthesis and characterization of heterobimetallic complexes of the type [Cu(pn2][MCl4] where M = Co(II, Ni(II, Cu(II, Zn(II, Cd(II, and Hg(II

Directory of Open Access Journals (Sweden)

Seema Yadav

2016-11-01

Full Text Available A series of new bimetallic transition metal complexes of the type [Cu(pn2] [MCl4] have been synthesized (where M = Co(II, Ni(II, Cu(II, Zn(II, Cd(II and Hg(II, pn = 1,3-diaminopropane and characterized by elemental analysis, molar conductance, TGA, IR and electronic spectra. All the compounds are 1:1 electrolyte in DMF. The Cu(II ion is square-planar while metal ions in the anionic moiety acquire their usual tetrahedral arrangement. On the basis of these studies it is concluded that anionic moiety is electrically stabilized by its cationic counterpart.

Small Diameter Bomb Increment II (SDB II)

Science.gov (United States)

2015-12-01

Selected Acquisition Report (SAR) RCS: DD-A&T(Q&A)823-439 Small Diameter Bomb Increment II (SDB II) As of FY 2017 President’s Budget Defense... Bomb Increment II (SDB II) DoD Component Air Force Joint Participants Department of the Navy Responsible Office References SAR Baseline (Production...Mission and Description Small Diameter Bomb Increment II (SDB II) is a joint interest United States Air Force (USAF) and Department of the Navy

Synthesis and structural characterization of nickel(II), cobalt(II), Zinc(II), manganese(II), cadmium(II) and uranium(VI) complexes of α-oximinoacetoacet-o/p-anisidide thiosemicarbazone

International Nuclear Information System (INIS)

Patel, P.S.; Patel, M.M.; Ray, R.M.

1993-01-01

A few metal complexes of α-oximinoacetoacet-o/p-anisidide thiosemicarbazones (OAOATS)/(OAPATS) with Ni(II), Co(II), Zn(II), Mn(II), Hg(II), Cd(II) and UO 2 (II) have been prepared and characterized by elemental analyses, conductivity, differential scanning calorimetry study, thermogravimetric analyses and infrared and electronic spectral measurements in conjunction with magnetic susceptibility measurements at room temperature. They have also been tested for their antimicrobial activities. (author). 24 refs., 2 tabs

Competitive adsorption of copper(II), cadmium(II), lead(II) and zinc(II) onto basic oxygen furnace slag

International Nuclear Information System (INIS)

Xue Yongjie; Hou Haobo; Zhu Shujing

2009-01-01

Polluted and contaminated water can often contain more than one heavy metal species. It is possible that the behavior of a particular metal species in a solution system will be affected by the presence of other metals. In this study, we have investigated the adsorption of Cd(II), Cu(II), Pb(II), and Zn(II) onto basic oxygen furnace slag (BOF slag) in single- and multi-element solution systems as a function of pH and concentration, in a background solution of 0.01 M NaNO 3 . In adsorption edge experiments, the pH was varied from 2.0 to 13.0 with total metal concentration 0.84 mM in the single element system and 0.21 mM each of Cd(II), Cu(II), Pb(II), and Zn(II) in the multi-element system. The value of pH 50 (the pH at which 50% adsorption occurs) was found to follow the sequence Zn > Cu > Pb > Cd in single-element systems, but Pb > Cu > Zn > Cd in the multi-element system. Adsorption isotherms at pH 6.0 in the multi-element systems showed that there is competition among various metals for adsorption sites on BOF slag. The adsorption and potentiometric titrations data for various slag-metal systems were modeled using an extended constant-capacitance surface complexation model that assumed an ion-exchange process below pH 6.5 and the formation of inner-sphere surface complexes at higher pH. Inner-sphere complexation was more dominant for the Cu(II), Pb(II) and Zn(II) systems

Competitive adsorption of copper(II), cadmium(II), lead(II) and zinc(II) onto basic oxygen furnace slag

Energy Technology Data Exchange (ETDEWEB)

Xue Yongjie [School of Resource and Environment Science, Wuhan University, Hubei, Wuhan (China); Wuhan Kaidi Electric Power Environmental Protection Co. Ltd., Hubei, Wuhan (China)], E-mail: xueyj@mail.whut.edu.cn; Hou Haobo; Zhu Shujing [School of Resource and Environment Science, Wuhan University, Hubei, Wuhan (China)

2009-02-15

Polluted and contaminated water can often contain more than one heavy metal species. It is possible that the behavior of a particular metal species in a solution system will be affected by the presence of other metals. In this study, we have investigated the adsorption of Cd(II), Cu(II), Pb(II), and Zn(II) onto basic oxygen furnace slag (BOF slag) in single- and multi-element solution systems as a function of pH and concentration, in a background solution of 0.01 M NaNO{sub 3}. In adsorption edge experiments, the pH was varied from 2.0 to 13.0 with total metal concentration 0.84 mM in the single element system and 0.21 mM each of Cd(II), Cu(II), Pb(II), and Zn(II) in the multi-element system. The value of pH{sub 50} (the pH at which 50% adsorption occurs) was found to follow the sequence Zn > Cu > Pb > Cd in single-element systems, but Pb > Cu > Zn > Cd in the multi-element system. Adsorption isotherms at pH 6.0 in the multi-element systems showed that there is competition among various metals for adsorption sites on BOF slag. The adsorption and potentiometric titrations data for various slag-metal systems were modeled using an extended constant-capacitance surface complexation model that assumed an ion-exchange process below pH 6.5 and the formation of inner-sphere surface complexes at higher pH. Inner-sphere complexation was more dominant for the Cu(II), Pb(II) and Zn(II) systems.

Competitive adsorption of copper(II), cadmium(II), lead(II) and zinc(II) onto basic oxygen furnace slag.

Science.gov (United States)

Xue, Yongjie; Hou, Haobo; Zhu, Shujing

2009-02-15

Polluted and contaminated water can often contain more than one heavy metal species. It is possible that the behavior of a particular metal species in a solution system will be affected by the presence of other metals. In this study, we have investigated the adsorption of Cd(II), Cu(II), Pb(II), and Zn(II) onto basic oxygen furnace slag (BOF slag) in single- and multi-element solution systems as a function of pH and concentration, in a background solution of 0.01M NaNO(3). In adsorption edge experiments, the pH was varied from 2.0 to 13.0 with total metal concentration 0.84mM in the single element system and 0.21mM each of Cd(II), Cu(II), Pb(II), and Zn(II) in the multi-element system. The value of pH(50) (the pH at which 50% adsorption occurs) was found to follow the sequence Zn>Cu>Pb>Cd in single-element systems, but Pb>Cu>Zn>Cd in the multi-element system. Adsorption isotherms at pH 6.0 in the multi-element systems showed that there is competition among various metals for adsorption sites on BOF slag. The adsorption and potentiometric titrations data for various slag-metal systems were modeled using an extended constant-capacitance surface complexation model that assumed an ion-exchange process below pH 6.5 and the formation of inner-sphere surface complexes at higher pH. Inner-sphere complexation was more dominant for the Cu(II), Pb(II) and Zn(II) systems.

Preparation of Schiff s base complexes of Mn(II), Co(II), Ni(II), Cu(II), Zn(II), and Cd(II) and their spectroscopic, magnetic, thermal, and antifungal studies

International Nuclear Information System (INIS)

Parekh, H.M.; Patel, M.N.

2006-01-01

The potassium salt of salicylidene-DL-alanine (KHL), bis(benzylidene)ethylenediamine (A 1 ), thiophene-o-carboxaldene-p-toluidine (A 2 ), and its metal complexes of the formula [(M II (L)(A)(H 2 O)] (M=Mn(II), Co(II), Ni(II), Cu(II), Zn(II), and Cd(II); A = A 1 or A 2 ) are prepared. They are characterized by elemental analysis, magnetic susceptibility measurements, thermogravimetric analysis, and infrared and electronic spectral studies. The electronic spectral and magnetic moment data suggest an octahedral geometry for the complexes. All of these complexes, metal nitrates, fungicides (bavistin and emcarb), and ligands are screened for their antifungal activity against Aspergillus niger, Fusarium oxysporum, and Aspergillus flavus using a plate poison technique. The complexes show higher activity than those of the free ligands, metal nitrate, and the control (DMSO) and moderate activity against bavistin and emcarb [ru

Cu(II) AND Zn(II)

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SYNTHESIS OF 2,2-DIMETHYL-4-PHENYL-[1,3]-DIOXOLANE USING ZEOLITE. ENCAPSULATED Co(II), Cu(II) AND Zn(II) COMPLEXES. B.P. Nethravathi1, K. Rama Krishna Reddy2 and K.N. Mahendra1*. 1Department of Chemistry, Bangalore University, Bangalore-560001, India. 2Department of Chemistry, Government ...

Spectroscopic and thermal degradation behavior of Mg(II, Ca(II, Ba(II and Sr(II complexes with paracetamol drug

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Moamen S. Refat

2017-05-01

Full Text Available Complexes of Mg(II, Ca(II, Ba(II and Sr(II with paracetamol drug were synthesized and characterized by elemental analysis, conductivity, UV–Vis, IR, and 1H NMR spectroscopy and thermal analysis, as well as screened for antimicrobial activity. The IR spectral data suggested that the ligand behaves as paracetamol behaves as a neutral bidentate ligand coordinated to the metal ions via the lone pair of electrons of nitrogen and carbonyl-O atoms of the amide group. From the microanalytical data, the stoichiometry of the complexes reacts with Mg(II, Ca(II, Ba(II and Sr(II by molar ratios (2:1 (paracetamol:metal ion. The thermal behavior (TG/DTG of the complexes was studied. The ligand and their metal complexes were screened against both of antibacterial and fungicidal activities.

Solar photocatalytic removal of Cu(II), Ni(II), Zn(II) and Pb(II): Speciation modeling of metal-citric acid complexes

International Nuclear Information System (INIS)

Kabra, Kavita; Chaudhary, Rubina; Sawhney, R.L.

2008-01-01

The present study is targeted on solar photocatalytic removal of metal ions from wastewater. Photoreductive deposition and dark adsorption of metal ions Cu(II), Ni(II), Pb(II) and Zn(II), using solar energy irradiated TiO 2 , has been investigated. Citric acid has been used as a hole scavenger. Modeling of metal species has been performed and speciation is used as a tool for discussing the photodeposition trends. Ninety-seven percent reductive deposition was obtained for copper. The deposition values of other metals were significantly low [nickel (36.4%), zinc (22.2%) and lead (41.4%)], indicating that the photocatalytic treatment process, using solar energy, was more suitable for wastewater containing Cu(II) ions. In absence of citric acid, the decreasing order deposition was Cu(II) > Ni(II) > Pb(II) > Zn(II), which proves the theoretical thermodynamic predictions about the metals

Tratamiento de la obesidad con productos naturales

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Lina Neri Espinosa Pire

2016-12-01

Full Text Available Los crecientes índices de obesidad alrededor del mundo, provocados principalmente por los excesos en la ingesta y la vida sedentaria, constituye uno de los grandes problemas de salud pública en nuestras sociedades. Entre otras formas como dietas y tratamientos que surgen cada día para combatir la obesidad, el uso de plantas medicinales conocido como fitoterapia, ha despertado gran interés. Existen ciertas plantas que poseen propiedades adelgazantes, sin embargo, lo mejor es ponerse en manos de especialistas en este campo, para recibir una correcta asesoría de acuerdo a las necesidades personales. Las plantas medicinales y los productos que de ellas se obtienen, constituyen remedios eficaces para combatir la obesidad, pues no tienen efectos adversos. No obstante el tratamiento debe combinarse con un cambio de hábitos alimentarios y actividad física y no conviene utilizarlos irresponsablemente, pues no todos tienen los mismos beneficios y efectos. La eficacia de la aplicación de plantas con la finalidad de bajar de peso ha sido comprobada en numerosos ensayos clínicos que se han realizado con determinadas especies vegetales. Las plantas medicinales se han utilizado tradicionalmente en forma de infusión, sin embargo esta forma de administración no permite controlar efectivamente las dosis administradas, por lo que es preferible hacerlo en preparados como cápsulas o comprimidos. Cada planta deberá administrarse de una manera específica y es importante que los preparados se tomen siempre en el mismo horario para potenciar su efectividad.

Cd(II), Cu(II)

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Depending on the way goethite was pretreated with oxalic acid, affinity for Cd(II) varied ...... Effects and mechanisms of oxalate on Cd(II) adsorption on goethite at different ... precipitation, surfactant mediation, hydrothermal and micro-emulsion.

Sequestration of Cu(II), Ni(II), and Co(II) by ethyleneimine immobilized on silica

International Nuclear Information System (INIS)

Arakaki, Luiza N.H.; Alves, Ana Paula M.; Silva Filho, Edson C. da; Fonseca, Maria G.; Oliveira, Severino F.; Espinola, Jose Geraldo P.; Airoldi, Claudio

2007-01-01

Thermodynamic data on interaction of Cu(II), Ni(II), and Co(II) with silica modified with ethyleneimine are obtained by calorimetric titration. The amount of ethyleneimine anchored on silica surface was estimated to be 0.70 mmol g -1 . The enthalpies of binding Ni(II), Cu(II) and Co(II), are -3.59 ± 0.001, -4.88 ± 0.001, and -7.75 ± 0.003 kJ mol -1 , respectively

Resúmenes Presentaciones de Pósteres

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Editor Gabriel Vargas Arana

2015-12-01

Full Text Available En este artículo se pueden encontrar los resúmenes de las presentaciones de pósteres del III Congreso Latinoamericano de Plantas Medicinales, desarrollado del 12 al 14 de agosto de 2015 en la ciudad de Iquitos, Perú.

Solid-phase extraction of Mn(II), Co(II), Ni(II), Cu(II), Cd(II) and Pb(II) ions from environmental samples by flame atomic absorption spectrometry (FAAS)

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Duran, Celal [Department of Chemistry, Faculty of Art and Science, Karadeniz Technical University, 61080 Trabzon (Turkey); Gundogdu, Ali [Department of Chemistry, Faculty of Art and Science, Karadeniz Technical University, 61080 Trabzon (Turkey); Bulut, Volkan Numan [Department of Chemistry, Giresun Faculty of Art and Science, Karadeniz Technical University, 28049 Giresun (Turkey); Soylak, Mustafa [Department of Chemistry, Faculty of Art and Science, Erciyes University, 38039 Kayseri (Turkey)]. E-mail: soylak@erciyes.edu.tr; Elci, Latif [Department of Chemistry, Faculty of Art and Science, Pamukkale University, 20020 Denizli (Turkey); Sentuerk, Hasan Basri [Department of Chemistry, Faculty of Art and Science, Karadeniz Technical University, 61080 Trabzon (Turkey); Tuefekci, Mehmet [Department of Chemistry, Faculty of Art and Science, Karadeniz Technical University, 61080 Trabzon (Turkey)

2007-07-19

A new method using a column packed with Amberlite XAD-2010 resin as a solid-phase extractant has been developed for the multi-element preconcentration of Mn(II), Co(II), Ni(II), Cu(II), Cd(II), and Pb(II) ions based on their complex formation with the sodium diethyldithiocarbamate (Na-DDTC) prior to flame atomic absorption spectrometric (FAAS) determinations. Metal complexes sorbed on the resin were eluted by 1 mol L{sup -1} HNO{sub 3} in acetone. Effects of the analytical conditions over the preconcentration yields of the metal ions, such as pH, quantity of Na-DDTC, eluent type, sample volume and flow rate, foreign ions etc. have been investigated. The limits of detection (LOD) of the analytes were found in the range 0.08-0.26 {mu}g L{sup -1}. The method was validated by analyzing three certified reference materials. The method has been applied for the determination of trace elements in some environmental samples.

Plant-plant interactions mediate the plastic and genotypic response of Plantago asiatica to CO2: an experiment with plant populations from naturally high CO2 areas.

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van Loon, Marloes P; Rietkerk, Max; Dekker, Stefan C; Hikosaka, Kouki; Ueda, Miki U; Anten, Niels P R

2016-06-01

The rising atmospheric CO2 concentration ([CO2]) is a ubiquitous selective force that may strongly impact species distribution and vegetation functioning. Plant-plant interactions could mediate the trajectory of vegetation responses to elevated [CO2], because some plants may benefit more from [CO2] elevation than others. The relative contribution of plastic (within the plant's lifetime) and genotypic (over several generations) responses to elevated [CO2] on plant performance was investigated and how these patterns are modified by plant-plant interactions was analysed. Plantago asiatica seeds originating from natural CO2 springs and from ambient [CO2] sites were grown in mono stands of each one of the two origins as well as mixtures of both origins. In total, 1944 plants were grown in [CO2]-controlled walk-in climate rooms, under a [CO2] of 270, 450 and 750 ppm. A model was used for upscaling from leaf to whole-plant photosynthesis and for quantifying the influence of plastic and genotypic responses. It was shown that changes in canopy photosynthesis, specific leaf area (SLA) and stomatal conductance in response to changes in growth [CO2] were mainly determined by plastic and not by genotypic responses. We further found that plants originating from high [CO2] habitats performed better in terms of whole-plant photosynthesis, biomass and leaf area, than those from ambient [CO2] habitats at elevated [CO2] only when both genotypes competed. Similarly, plants from ambient [CO2] habitats performed better at low [CO2], also only when both genotypes competed. No difference in performance was found in mono stands. The results indicate that natural selection under increasing [CO2] will be mainly driven by competitive interactions. This supports the notion that plant-plant interactions have an important influence on future vegetation functioning and species distribution. Furthermore, plant performance was mainly driven by plastic and not by genotypic responses to changes in

Average [O II] nebular emission associated with Mg II absorbers: dependence on Fe II absorption

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Joshi, Ravi; Srianand, Raghunathan; Petitjean, Patrick; Noterdaeme, Pasquier

2018-05-01

We investigate the effect of Fe II equivalent width (W2600) and fibre size on the average luminosity of [O II] λλ3727, 3729 nebular emission associated with Mg II absorbers (at 0.55 ≤ z ≤ 1.3) in the composite spectra of quasars obtained with 3 and 2 arcsec fibres in the Sloan Digital Sky Survey. We confirm the presence of strong correlations between [O II] luminosity (L_{[O II]}) and equivalent width (W2796) and redshift of Mg II absorbers. However, we show L_{[O II]} and average luminosity surface density suffer from fibre size effects. More importantly, for a given fibre size, the average L_{[O II]} strongly depends on the equivalent width of Fe II absorption lines and found to be higher for Mg II absorbers with R ≡W2600/W2796 ≥ 0.5. In fact, we show the observed strong correlations of L_{[O II]} with W2796 and z of Mg II absorbers are mainly driven by such systems. Direct [O II] detections also confirm the link between L_{[O II]} and R. Therefore, one has to pay attention to the fibre losses and dependence of redshift evolution of Mg II absorbers on W2600 before using them as a luminosity unbiased probe of global star formation rate density. We show that the [O II] nebular emission detected in the stacked spectrum is not dominated by few direct detections (i.e. detections ≥3σ significant level). On an average, the systems with R ≥ 0.5 and W2796 ≥ 2 Å are more reddened, showing colour excess E(B - V) ˜ 0.02, with respect to the systems with R < 0.5 and most likely trace the high H I column density systems.

Structural information on the coordination compounds formed by manganese(II), cobalt(II), nickel(II), zinc(II), cadmium(II) and mercury(II) thiocyanates with 4-cyanopyridine N-oxide from their magnetic moments, electronic and infrared spectra

Science.gov (United States)

Ahuja, I. S.; Yadava, C. L.; Singh, Raghuvir

1982-05-01

Coordination compounds formed by the interaction of 4-cyanopyridine. N-oxide (4-CPO), a potentially bidentate ligand, with manganese(II), cobalt(II), nickel(II), zinc(II), cadmium(II) and rnercury(II) thiocyanates have been prepared and characterized from their elemental analyses, magnetic susceptibilities, electronic and infrared spectral studies down to 200 cm -1 in the solid state. The compounds isolated are: Mn(4-CPO) 2(NCS) 2, Co(4-CPO) 2(NCS) 2,Ni(4-CPO) 2(NCS) 2,Zn(4-CPO) 2(NCS) 2, Cd(4-CPO)(NCS) 2 and Hg(4-CPO) 2(SCN) 2. It is shown that 4-CPO acts as a terminal N-oxide oxygen bonded monodentate ligand in all the metal(II) thiocyanate complexes studied. Tentative stereochemistries of the complexes in the solid state are discussed. The ligand field parameters 10 Dq, B, β and λ calculated for the manganese(II), cobalt(II) and nickel(II) complexes are consistent with their proposed stereochemistries.

Macrocyclic receptor showing extremely high Sr(II)/Ca(II) and Pb(II)/Ca(II) selectivities with potential application in chelation treatment of metal intoxication.

Science.gov (United States)

Ferreirós-Martínez, Raquel; Esteban-Gómez, David; Tóth, Éva; de Blas, Andrés; Platas-Iglesias, Carlos; Rodríguez-Blas, Teresa

2011-04-18

Herein we report a detailed investigation of the complexation properties of the macrocyclic decadentate receptor N,N'-Bis[(6-carboxy-2-pyridil)methyl]-4,13-diaza-18-crown-6 (H(2)bp18c6) toward different divalent metal ions [Zn(II), Cd(II), Pb(II), Sr(II), and Ca(II)] in aqueous solution. We have found that this ligand is especially suited for the complexation of large metal ions such as Sr(II) and Pb(II), which results in very high Pb(II)/Ca(II) and Pb(II)/Zn(II) selectivities (in fact, higher than those found for ligands widely used for the treatment of lead poisoning such as ethylenediaminetetraacetic acid (edta)), as well as in the highest Sr(II)/Ca(II) selectivity reported so far. These results have been rationalized on the basis of the structure of the complexes. X-ray crystal diffraction, (1)H and (13)C NMR spectroscopy, as well as theoretical calculations at the density functional theory (B3LYP) level have been performed. Our results indicate that for large metal ions such as Pb(II) and Sr(II) the most stable conformation is Δ(δλδ)(δλδ), while for Ca(II) our calculations predict the Δ(λδλ)(λδλ) form being the most stable one. The selectivity that bp18c6(2-) shows for Sr(II) over Ca(II) can be attributed to a better fit between the large Sr(II) ions and the relatively large crown fragment of the ligand. The X-ray crystal structure of the Pb(II) complex shows that the Δ(δλδ)(δλδ) conformation observed in solution is also maintained in the solid state. The Pb(II) ion is endocyclically coordinated, being directly bound to the 10 donor atoms of the ligand. The bond distances to the donor atoms of the pendant arms (2.55-2.60 Å) are substantially shorter than those between the metal ion and the donor atoms of the crown moiety (2.92-3.04 Å). This is a typical situation observed for the so-called hemidirected compounds, in which the Pb(II) lone pair is stereochemically active. The X-ray structures of the Zn(II) and Cd(II) complexes show that

Solid Phase Extraction of Trace Al(III), Fe(II), Co(II), Cu(II), Cd(II) and Pb(II) Ions in Beverages on Functionalized Polymer Microspheres Prior to Flame Atomic Absorption Spectrometric Determinations.

Science.gov (United States)

Berber, Hale; Alpdogan, Güzin

2017-01-01

In this study, poly(glycidyl methacrylate-methyl methacrylate-divinylbenzene) was synthesized in the form of microspheres, and then functionalized by 2-aminobenzothiazole ligand. The sorption properties of these functionalized microspheres were investigated for separation, preconcentration and determination of Al(III), Fe(II), Co(II), Cu(II), Cd(II) and Pb(II) ions using flame atomic absorption spectrometry. The optimum pH values for quantitative sorption were 2 - 4, 5 - 8, 6 - 8, 4 - 6, 2 - 6 and 2 - 3 for Al(III), Fe(II), Co(II), Cu(II), Cd(II) and Pb(II), respectively, and also the highest sorption capacity of the functionalized microspheres was found to be for Cu(II) with the value of 1.87 mmol g -1 . The detection limits (3σ; N = 6) obtained for the studied metals in the optimal conditions were observed in the range of 0.26 - 2.20 μg L -1 . The proposed method was successfully applied to different beverage samples for the determination of Al(III), Fe(II), Co(II), Cu(II), Cd(II) and Pb(II) ions, with the relative standard deviation of <3.7%.

Use of medicinal plants for diabetes in Trinidad and Tobago Uso de plantas medicinales para la diabetes en Trinidad y Tabago

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D. Mahabir

1997-03-01

Full Text Available Use of herbal remedies from medicinal plants (bush medicines was studied in 622 people with diabetes mellitus attending 17 government health centers on the island of Trinidad, Trinidad and Tobago. Bush medicines were used by 42% of patients surveyed and were used for diabetes by 24%. Bush medicine use was more frequent in Afro-Trinidadians and in those of mixed ethnicity than in Indo-Trinidadians, and was also more prevalent in those with lower educational attainment. Most patients using bush medicines (214/264, or 81% reported gathering the plants themselves, and 107/264 (41% took them more frequently than once a week. Patients taking bush medicines mentioned 103 different plants used in remedies. Among the 12 most frequently mentioned, caraili, aloes, olive-bush, and seed-under-leaf were preferentially used for diabetes. Vervine, chandilay, soursop, fever grass, and orange peel were preferentially used for other indications. Patients who reported burning or numbness in the feet or feelings of tiredness, weakness, giddiness, or dizziness used bush medicines for diabetes more frequently than did patients who reported a range of other diabetes-related symptoms. Insulin-treated patients were less frequent users of bush medicines. It is concluded that bush medicines are taken regularly by many patients with diabetes in Trinidad. Plants most frequently used as remedies for diabetes have recognized hypoglycemic activity. Patients' culture, educational background, type of symptoms, and formal medical treatment may also influence the selection and use of bush medicines.El uso de remedios a base de plantas medicinales (medicinas herbolarias se estudió en 622 personas con diabetes mellitus que asistían a 17 centros de salud gubernamentales en la isla de Trinidad, en Trinidad y Tabago. Se observó el uso de medicinas herbolarias en 42% de los pacientes encuestados y su utilización para la diabetes se observó en 24%. El empleo de estas medicinas fue m

Root-shoot growth responses during interspecific competition quantified using allometric modelling.

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Robinson, David; Davidson, Hazel; Trinder, Clare; Brooker, Rob

2010-12-01

Plant competition studies are restricted by the difficulty of quantifying root systems of competitors. Analyses are usually limited to above-ground traits. Here, a new approach to address this issue is reported. Root system weights of competing plants can be estimated from: shoot weights of competitors; combined root weights of competitors; and slopes (scaling exponents, α) and intercepts (allometric coefficients, β) of ln-regressions of root weight on shoot weight of isolated plants. If competition induces no change in root : shoot growth, α and β values of competing and isolated plants will be equal. Measured combined root weight of competitors will equal that estimated allometrically from measured shoot weights of each competing plant. Combined root weights can be partitioned directly among competitors. If, as will be more usual, competition changes relative root and shoot growth, the competitors' combined root weight will not equal that estimated allometrically and cannot be partitioned directly. However, if the isolated-plant α and β values are adjusted until the estimated combined root weight of competitors matches the measured combined root weight, the latter can be partitioned among competitors using their new α and β values. The approach is illustrated using two herbaceous species, Dactylis glomerata and Plantago lanceolata. Allometric modelling revealed a large and continuous increase in the root : shoot ratio by Dactylis, but not Plantago, during competition. This was associated with a superior whole-plant dry weight increase in Dactylis, which was ultimately 2·5-fold greater than that of Plantago. Whole-plant growth dominance of Dactylis over Plantago, as deduced from allometric modelling, occurred 14-24 d earlier than suggested by shoot data alone. Given reasonable assumptions, allometric modelling can analyse competitive interactions in any species mixture, and overcomes a long-standing problem in studies of competition.

Species-specific effects of live roots and shoot litter on soil decomposer abundances do not forecast plant litter-nitrogen uptake.

Science.gov (United States)

Saj, Stéphane; Mikola, Juha; Ekelund, Flemming

2009-08-01

Plant species produce litter of varying quality and differ in the quality and quantity of compounds they release from live roots, which both can induce different decomposer growth in the soil. To test whether differences in decomposer growth can forecast the amount of N species acquire from plant litter, as suggested by theory, we grew individuals of three grassland plants-Holcus lanatus, Plantago lanceolata and Lotus corniculatus-in soils into which (15)N-labelled litter of either Holcus, Plantago or Lotus was added. We measured the effects of live roots and litter of each species on soil microbes and their protozoan and nematode feeders, and to link decomposer growth and plant nutrient uptake, we measured the amount of N taken up by plants from the added litter. We hypothesised that those species that induce the highest growth of microbes, and especially that of microbial feeders, will also take up the highest amount of N from the litter. We found, however, that although numbers of bacterial-feeding Protozoa and nematodes were on average lower after addition of Holcus than Plantago or Lotus litter, N uptake was higher from Holcus litter. Further, although the effects on Protozoa and bacterial- and fungal-feeding nematodes did not differ between the live plants, litter-N uptake differed, with Holcus being the most efficient compared to Plantago and Lotus. Hence, although microbes and their feeders unquestionably control N mineralization in the soil, and their growth differs among plant species, these differences cannot predict differences in litter-N uptake among plant species. A likely reason is that for nutrient uptake, other species-specific plant traits, such as litter chemistry, root proliferation ability and competitiveness for soil N, override in significance the species-specific ability of plants to induce decomposer growth.

Hirudin in the treatment of arterial and venous thrombotic diseases: a new perspective

NARCIS (Netherlands)

Büller, H. R.

1993-01-01

The first description of the anticoagulant action of a water-soluble, heat-resistant substance derived from the salivary glands of leeches (Hirudo medicinales) dates back to 1884. This substance was later called hirudin in 1904. Almost no research was done with this compound until the 1960's. More

Synthesis, characterization and thermal studies of nickel (II), copper (II), zinc (II) and cadmium (II) complexes with some mixed ligands

International Nuclear Information System (INIS)

Mitra, Samiran; Kundu, Parimal; Singh, Rajkumar Bhubon

1998-01-01

Dichloro-(DCA) and trichloroacetate(TCA) -cyclic ligand morpholine (Morph)/thiomorpholine (Tmorph)/methylmorpholine (Mmorph)/dimethyl-piperazine (DMP) complexes of nickel (II), copper (II), zinc (II) and cadmium (II) with the compositions [Ni(tmorph) 2 (DCA) 2 ], [Ni(tmorph) 2 (TCA) 2 ].2H 2 O, [Cu(DMP) 2 (TCA) 2 ],[ML 2 X 2 ].nH 2 O where M=Zn II or Cd II , L=Morph, DMP or tmorph and X=DCA or TCA and n=O except in case of [Cd (Morph) 2 (TCA) 2 ] where n=1 have been synthesised. Some intermediate complexes have been isolated by temperature arrest technique (pyrolysis) and characterised. Configurational and conformational changes have been studied by elemental analyses, IR and electronic spectra, magnetic moment data (in the case of Ni(II) and Cu(II) complexes) and thermal analysis. E a * , ΔH, and ΔS for the decomposition reaction of these complexes are evaluated and the stability of the complexes with respect to activation energy has also been compared. The linear correlation has been found between E a * and ΔS for the decomposition of the complexes. (author)

Influences of image resolution on herbaceous root morphological parameters

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ZHANG Zeyou

2014-06-01

Full Text Available Root images of four herbaceous species (including Plantago virginica,Solidago canadensis,Conyza canadensis and Erigeron philadelphicus were obtained by using EPSON V7000 scanner with different resolutions.Root morphological parameters including root length,diameter,volume and area were determined by using a WinRhizo root analyzing software.The results show a distinct influence of image resolution on root morphological parameter.For different herbaceous species,the optimal resolutions of root images,which would produce an acceptable precision with relative short time,vary with different species.For example,a resolution of 200 dpi was recommended for the root images of Plantago virginica and S.Canadensis, while 400 dpi for Conyza canadensis and Erigeron philadelphicus.

Competition from Cu(II), Zn(II) and Cd(II) in Pb(II) binding to Suwannee River Fulvic Acid

NARCIS (Netherlands)

Chakraborty, P.; Chakrabarti, C.L.

2008-01-01

This is a study of trace metal competition in the complexation of Pb(II) by well-characterized humic substances, namely Suwannee River Fulvic Acid (SRFA) in model solutions. It was found that Cu(II) seems to compete with Pb(II) for strong binding sites of SRFA when present at the same concentration

Synthesis, investigation and spectroscopic characterization of piroxicam ternary complexes of Fe(II), Fe(III), Co(II), Ni(II), Cu(II) and Zn(II) with glycine and DL-phenylalanine

Science.gov (United States)

Mohamed, Gehad G.; El-Gamel, Nadia E. A.

2004-11-01

The ternary piroxicam (Pir; 4-hydroxy-2-methyl- N-(2-pyridyl)-2H-1,2-benzothiazine-3-carboxamide 1,1-dioxide) complexes of Fe(II), Fe(III), Co(II), Ni(II), Cu(II) and Zn(II) with various amino acids (AA) such as glycine (Gly) or DL-phenylalanine (PhA) were prepared and characterized by elemental analyses, molar conductance, IR, UV-Vis, magnetic moment, diffuse reflectance and X-ray powder diffraction. The UV-Vis spectra of Pir and the effect of metal chelation on the different interligand transitions are discussed in detailed manner. IR and UV-Vis spectra confirm that Pir behaves as a neutral bidentate ligand coordinated to the metal ions via the pyridine- N and carbonyl group of the amide moiety. Gly molecule acted as a uninegatively monodentate ligand and coordinate to the metal ions through its carboxylic group, in addition PhA acted as a uninegatively bidentate ligand and coordinate to the metal ions through its carboxylic and amino groups. All the chelates have octahedral geometrical structures while Cu(II)- and Zn(II)-ternary chelates with PhA have square planar geometrical structures. The molar conductance data reveal that most of these chelates are non electrolytes, while Fe(III)-Pir-Gly, Co(II)-, Ni(II)-, Cu(II)- and Zn(II)-Pir-PhA cheletes were 1:1 electrolytes. X-ray powder diffraction is used as a new tool to estimate the crystallinity of chelates as well as to elucidate their geometrical structures.

Coordination compounds of cobalt(II), nickel(II), copper(II), and zinc(II) with pantothenic acid

Energy Technology Data Exchange (ETDEWEB)

Shabilalov, A.A.; Yunuskhodzhaev, A.N.; Khodzhaev, O.F.; Azizov, M.A.

1986-11-01

The compounds Ni(PANA - H)/sub 2/ x 4H/sub 2/O (PANA stands for pantothenic acid, and - H indicates a deprotonated ligand), Cu(PANA - H)/sub 2/ x 2H/sub 2/O, Zn(PANA - H)/sub 2/ x H/sub 2/O, Co(PANA - H)Cl x H/sub 2/O, and Ni(PANA - H)Cl x 3H/sub 2/O have been synthesized on the basis of pantothenic acid and Co(II), Ni(II), Cu(II), and Zn(II) salts in aqueous media. The compounds have been identified by elemental and x-ray diffraction analysis. Some physicochemical properties (solubility, melting point, molar conductivity) of the compounds obtained have been studied. The structure of the compounds isolated has been established on the basis of an analysis of their IR, ESR, and electronic spectra, as well as derivatograms.

Spectroscopic and thermal degradation behavior of Mg(II), Ca(II), Ba(II) and Sr(II) complexes with paracetamol drug

OpenAIRE

Moamen S. Refat; Gehad G. Mohamed; Mohamed Y. El-Sayed; Hamada M.A. Killa; Hammad Fetooh

2017-01-01

Complexes of Mg(II), Ca(II), Ba(II) and Sr(II) with paracetamol drug were synthesized and characterized by elemental analysis, conductivity, UV–Vis, IR, and 1H NMR spectroscopy and thermal analysis, as well as screened for antimicrobial activity. The IR spectral data suggested that the ligand behaves as paracetamol behaves as a neutral bidentate ligand coordinated to the metal ions via the lone pair of electrons of nitrogen and carbonyl-O atoms of the amide group. From the microanalytical dat...

In vitro antimalarial activity and cytotoxicity of some selected cuban medicinal plants Actividad antimalárica in vitro y citotoxicidad de algunas plantas medicinales Cubanas seleccionadas

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Aymé Fernández-Calienes Valdés

2010-08-01

Full Text Available Terrestrial plants have been demonstrated to be sources of antimalarial compounds. In Cuba, little is known about antimalarial potentials of plant species used as medicinals. For that reason, we evaluated the antimalarial activity of 14 plant species used in Cuba as antimalarial, antipyretic and/or antiparasitic. Hydroalcoholic extracts were prepared and tested in vitro for the antimalarial activity against Plasmodium falciparum Ghana strain and over human cell line MRC-5 to determine cytotoxicity. Parasite multiplication was determined microscopically by the direct count of Giemsa stained parasites. A colorimetric assay was used to quantify cytotoxicity. Nine extracts showed IC50 values lower than 100 µg/mL against P. falciparum, four extracts were classified as marginally active (SI 10. B. vulgaris showed the most potent and specific antiplasmodial action (IC50 = 4.7 µg/mL, SI = 28.9. Phytochemical characterization of active extracts confirmed the presence of triterpenoids in B. vulgaris and polar compounds with phenol free groups and fluorescent metabolites in both extracts as major phytocompounds, by thin layer chromatography. In conclusion, antimalarial use of B. vulgaris and P. hysterophorus was validated. B. vulgaris and P. granatum extracts were selected for follow-up because of their strong antimalarial activity.Las plantas terrestres han demostrado ser fuentes de compuestos antimaláricos. En Cuba, el conocimiento sobre el potencial antimalárico de las plantas medicinales es escaso. Por esta razón, evaluamos la actividad antimalárica de 14 especies de plantas usadas en Cuba como antimaláricas, antipiréticas y/o antiparasitarias. Se prepararon extractos hidroalcohólicos y se probaron in vitro frente a la cepa Ghana de Plasmodium falciparum para la actividad antimalárica y frente a la línea celular humana MRC-5 para determinar citotoxicidad. La multiplicación de los parásitos se determinó microscópicamente mediante el

Optimization of simultaneous electrochemical determination of Cd(II), Pb(II), Cu(II) and Hg(II) at carbon nanotube-modified graphite electrodes.

Science.gov (United States)

Pikna, L'ubomír; Heželová, Mária; Kováčová, Zuzana

2015-01-01

The health of the environment is worsening every day. Monitoring of potentially toxic elements and remediation of environmental pollution are necessary. Therefore, the research and development of simple, inexpensive, portable and effective sensors is important. Electrochemistry is a useful component of the field of environment monitoring. The present study focuses on evaluating and comparing three types of electrodes (PIGE, PIGE/MWCNT/HNO3 and PIGE/MWCNT/EDTA/HNO3) employed for the simultaneous electrochemical determination of four potentially toxic elements: Cd(II), Pb(II), Cu(II) and Hg(II). Cyclic voltammograms were measured in an acetate buffer. The LOD, LOQ, the standard and relative precisions of the method and a prediction intervals were calculated (according to the technical procedure DIN 32 645) for the three electrodes and for each measured element. The LOD for PIGE/CNT/HNO3 (the electrode with narrowest calculated prediction intervals) was 2.98 × 10(-7) mol L(-1) for Cd(II), 4.83 × 10(-7) mol L(-1) for Pb(II), 3.81 × 10(-7) mol L(-1) for Cu(II), 6.79 × 10(-7) mol L(-1) for Hg(II). One of the benefits of this study was the determination of the amount of Hg(II) in the mixture of other elements.

Synthesis, spectral characterization thermal stability, antimicrobial studies and biodegradation of starch–thiourea based biodegradable polymeric ligand and its coordination complexes with [Mn(II), Co(II), Ni(II), Cu(II), and Zn(II)] metals

OpenAIRE

Nahid Nishat; Ashraf Malik

2016-01-01

A biodegradable polymer was synthesized by the modification reaction of polymeric starch with thiourea which is further modified by transition metals, Mn(II), Co(II), Ni(II), Cu(II) and Zn(II). All the polymeric compounds were characterized by (FT-IR) spectroscopy, 1H NMR spectroscopy, 13C NMR spectroscopy, UV–visible spectra, magnetic moment measurements, thermogravimetric analysis (TGA) and antibacterial activities. Polymer complexes of Mn(II), Co(II) and Ni(II) show octahedral geometry, wh...

Extraction studies of Cd(II), Cu(II), Mn(II), Ni(II) and Zn(II) using N, N', N, N' -Bis((2-hydroxy-3,5-di-tert-butylbenzyl) (2-pyridylmethyl)) -ethylenediamine as a novel ligand

International Nuclear Information System (INIS)

Laus, R.; Anjos, A.D.; Naves, A.

2008-01-01

In the present study, the use of N,N',N,N'-bis((2-hydroxy-3,5-di-tert-butylbenzyl) (2- pyridylmethyl))-ethylenediamine (H2L) as ligand was evaluated in the liquid-liquid (water- chloroform) extraction of Cd(II), Cu(II), Mn(II), Ni(II) and Zn(II). Experiments were carried out to determine the pH for maximum extraction for each metal ion by ligand, maximum extraction capacity, extraction kinetics and extraction selectivity. The results revealed that the extraction of metal ions is dependent on the pH: maximum extraction maximum was obtained in the pH range of 4.5 - 6.0 for Cu(II) and 8.0 - 9.0 for Zn(II). Cd(II) and Mn(II) were best extracted at pH 9.0 and Ni(II) at 10.0. The ligand H2L was effective for the extraction of Cd(II), Cu(II) and Zn(II) (extraction efficient, %E equal 100%), whereas %E of 76% and 23.5% were observed for Mn(II) and Ni(II), respectively. The ligand presented high selectivity for the extraction of Cu(II) at pH 4.0. (author)

Preparation and Spectral Properties of Mixed-Ligand Complexes of VO(IV, Ni(II, Zn(II, Pd(II, Cd(II and Pb(II with Dimethylglyoxime and N-acetylglycine

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Shayma A. Shaker

2010-01-01

Full Text Available A number of mixed-ligand complexes of the general formula [M(D(G] where D=dimethylglyoximato monoanion, G=N-acetylglycinato and M=VO(IV, Ni(II, Zn(II, Pd(II, Cd(II and Pb(II were prepared. Each complex was characterized by elemental analysis, determination of metal, infrared spectra, electronic spectra, (1H and 13C NMR spectra, conductivity and magnetic moments. All these complexes were not soluble in some of the organic solvent but highly soluble in dimethylformamide. The conductivity data showed the non-electrolytic nature of the complexes. The electronic spectra exhibited absorption bands in the visible region caused by the d-d electronic transition such as VO(IV, Ni(II and Pd(II. The IR and (1H, 13C NMR spectra which have indicate that the dimethylglyoxime was coordinated with the metal ions through the N and O atoms of the oxime group and N-acetylglycine was coordinated with metal ions through the N atom and terminal carboxyl oxygen atom.

Synthesis and characterization of polychelates of Cu(II), Ni(II), Co(II), Mn(II), Zn(II), oxovanadium(IV) and dioxouranium(VI) with 2,4-dihydroxybenzaldehyde-urea-formaldehyde polymer

International Nuclear Information System (INIS)

Patel, G.C.; Pancholi, H.B.; Patel, M.M.

1991-01-01

Polychelates of Cu(II), Ni(II), Co(II), Mn(II), Zn(II), oxovandium(IV) and dioxouranium(VI) with 2,4-dihydroxybenzaldehyde (2,4-DB)-urea(U)-formaldehyde(F) polymer (2,4-DBUF) have been prepared. Elemental analyses of the polychelates indicate a metal:ligand ratio of 1:2. The structures of the polychelates have been assigned on the basis of their elemental analyses, IR, reflectance spectra, magnetic moment, thermal data and their electrical conductivity behaviour. (author). 1 tab., 18 refs

Ni (II) and Cu(II) complexes of

African Journals Online (AJOL)

ADOWIE PERE

ABSTRACT: The objective of this study is to investigate the antimicrobial activity of novel. Schiff base metal complexes. The resistance of micro-organisms to classical antimicrobial compounds poses a challenge to effective management and treatment of some diseases. In line with this, copper (II), nickel (II) and cobalt (II) ...

Synthesis and characterization of chromium(III), manganese(II), iron(III), cobalt(II), nickel(II), copper(II), cadmium(II) and dioxouranium(VI) complexes of 4(2-pyridyl)-1-(2,4-dihydroxybenzaldehyde)-3-thiosemicarbazone

International Nuclear Information System (INIS)

Abu El-Reash, G.M.; Ibrahim, M.M.; Kenawy; El-Ayaan, Usama; Khattab, M.A.

1994-01-01

A few complexes of Cr(III), Mn(II), Fe(III), Co(II), Ni(II), Cu(II), Zn(II), Cd(II) and dioxouranium(VI) with 4(2-pyridyl)-1-(2,4-dihydroxybenzaldehyde)-3-thiosemicarbazone have been synthesised and characterized on the basis of elemental analysis, IR, electronic NMR, and magnetic moment data. An octahedral structure is proposed for the Cr(III), Fe(III), Co(II) and Ni(H 3 PBT) 2 Cl 2 .2H 2 O complexes; a tetrahedral structure for the Mn(II) and Ni 2 (PBT)OAc.H 2 0 complexes and a square planar structure for the Cu(II) complexes. The antimicrobial and antifungal activities of H 3 PBT and of its metal(II) complexes are investigated. The results reveal that H 3 PBT exhibits greater antimicrobial activities than its complexes. (author). 34 refs., 4 figs., 2 tabs

Copper (II)

African Journals Online (AJOL)

CLEMENT O BEWAJI

Valine (2 - amino - 3 – methylbutanoic acid), is a chemical compound containing .... Stability constant (Kf). Gibb's free energy. ) (. 1. −. ∆. Mol. JG. [CuL2(H2O)2] ... synthesis and characterization of Co(ii), Ni(ii), Cu (II), and Zn(ii) complexes with ...

Synthesis and Spectral Investigations of Manganese(II, Cobalt(II, Nickel(II, Copper(II and Zinc(II Complexes of New Polydentate Ligands Containing a 1,8-Naphthyridine Moiety

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Sunkari Jyothi

2006-12-01

Full Text Available 2-(o-Hydroxyphenyl-1,8-naphthyridine (HN, 2-(4-hydroxy-6-methylpyran-2-one-3-yl-1,8-naphthyridine (HMPN and 2-(benzimidazol-2-yl-1,8-naphthyridine(BN react with acetates of Mn(II, Co(II, Ni(II, Cu(II and Zn(II to yield metal ioncomplexes of definite composition. These compounds were characterized by elementalanalyses, molar conductivity, magnetic susceptibility measurements, thermal studies, IR,UV-visible, NMR and mass spectral investigations. The complexes are found to have theformulae [M(HN2(H2O2], [M(HMPN2(H2O2] and [M(BN2(OAc2], respectively.

Uso de hierbas medicinales en mujeres gestantes y en lactancia en un hospital universitario de Bogotá (Colombia The use of herbal medicine among pregnant and lactating women attending a university hospital in Bogota, Colombia

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Gloria Paulina Pulido Acuña

2012-12-01

Full Text Available Las mujeres durante la gestación y lactancia utilizan diferentes hierbas y es escasa la información en el ámbito clínico en Colombia. Objetivo: Describir las prácticas relacionadas con el uso de hierbas en mujeres gestantes y en lactancia del Hospital de San José, Bogotá (Colombia. Metodología: Estudio de corte transversal. Con un cuestionario estructurado se indagó el uso, la frecuencia, el modo y razones de uso, de las hierbas medicinales y de quién se aprendió la práctica. Resultados: El uso de hierbas en mujeres gestantes y en lactancia fue de 33.6% (IC95%: 29.2% - 38% y 36.6% (IC95%: 30.8% - 42.3%, respectivamente. En el grupo de gestantes la hierba más usada fue la manzanilla (36.7% y en las mujeres en lactancia fue el hinojo (65%. Conclusión: Las mujeres gestantes y en lactancia, utilizan hierbas para las molestias del embarazo, acelerar el parto, disminuir el frío y promover la producción de leche.The use of herbal supplements is a common practice about pregnant and lactating women, however in Colombia there is limited data regarding the extent of women's use of herbal medicines during pregnancy and breastfeeding. The aim of this study was to describe the patterns of herbal medication use among pregnant and lactating women at the Hospital San Jose in Bogota, Colombia. Methods: Cross-sectional study. A questionnaire was designed to measure the frequency of herbal supplementation, why women took the herbal medicine, form of supplements, and who recommended the supplements or how did they learn about the herbal supplements. Results: The use of herbal supplements among pregnant and lactating women is 33.6% (CI 95%: 29.2%-38% and 36.6 (CI 95%: 30.8%-42.3%, respectively. The most common supplement used by pregnant women is Chamomile (36,7%, and among lactating women is Fennel (Foeniculum vulgare (65%. Conclusion: Pregnant and breastfeeding women use herbal supplements for specific pregnancy-related problems, to induce labor, to

Coordination behavior of tetraaza [N4] ligand towards Co(II), Ni(II), Cu(II), Cu(I) and Pd(II) complexes: Synthesis, spectroscopic characterization and anticancer activity

Science.gov (United States)

El-Boraey, Hanaa A.

2012-11-01

Novel eight Co(II), Ni(II), Cu(II), Cu(I) and Pd(II) complexes with [N4] ligand (L) i.e. 2-amino-N-{2-[(2-aminobenzoyl)amino]ethyl}benzamide have been synthesized and structurally characterized by elemental analysis, spectral, thermal (TG/DTG), magnetic, and molar conductivity measurements. On the basis of IR, mass, electronic and EPR spectral studies an octahedral geometry has been proposed for Co(II), Ni(II) complexes and Cu(II) chloride complex, square-pyramidal for Cu(I) bromide complex. For Cu(II) nitrate complex (6), Pd(II) complex (8) square planar geometry was proposed. The EPR data of Cu(II) complexes in powdered form indicate dx2-y2 ground state of Cu(II) ion. The antitumor activity of the synthesized ligand and some selected metal complexes has been studied. The palladium(II) complex (8) was found to display cytotoxicity (IC50 = 25.6 and 41 μM) against human breast cancer cell line MCF-7 and human hepatocarcinoma HEPG2 cell line.

Análisis microbiológico de plantas medicinales con óxido de etileno Microbiologic analysis of medicinal plants using ethylene oxide

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Mausy Lorena Torres Rojas

2007-08-01

Full Text Available La utilización de plantas curativas constituye una de las terapias médicas más antiguas y extendidas que se remonta a los tiempos prehistóricos (Wust, 2003. Cada cultura ha desarrollado sus tradiciones de medicina popular, con remedios y ritos que utilizan plantas locales. La Organización Mundial de la Salud, mediante varios comunicados ha expresado su posición con respecto a la necesidad de revalorar la utilización de las plantas medicinales dentro del ámbito sanitario, teniendo en cuenta que el 80 % de la población mundial depende de estas en lo referente a la atención primaria de salud (Alonso, 1998. Frente a esta necesidad y a la preocupación que genera ofrecer productos de alta calidad, la investigación realizada permitió evaluar algunas de las materias primas, como: Boldo (Peumus boldus, Caléndula (Calendula officinalis, Sen (Casia angustifolia Vahl, Fucus (Fucus vesiculosas L y Spirulina (Spirulina maxima, que son importantes por la gran oferta que estas tienen en el mercado. El objetivo de este estudio fue evaluar la calidad microbiológica y establecer si el proceso de esterilización con óxido de etileno tenía un efecto eficaz sobre la materia prima, propuesta a evaluar. Se realizó el recuento de microorganismos mesófilos aerobios, hongos, levaduras y pruebas de ausencia/presencia para microorganismos patógenos como: Escherichia coli, Pseudomonas aeruginosa, Salmonella s.p, Clostridium perfringes y Staphylococcus aureus. Estas pruebas se realizaron con la utilización de medios de cultivo específicos: TSN, EMB, CETRIMIDE, XLD, B.P, OGY (hongos y levaduras y Plate Count (mesófilos aerobios. Los resultados obtenidos a partir de las muestras analizadas permitieron obtener datos significativos relacionados con la ausencia/presencia de microorganismos patógenos antes y después del proceso de esterilización, así como el recuento de mesófilos, hongos y levaduras. En las muestras analizadas antes de la esterilizaci

EFECTO DE UN GEL DE THEOBROMA CACAO EN EL CONTROL DE CARIES VESTIBULAR EN PACIENTES CON TRATAMIENTO DE ORTODONCIA. CONSULTA PRIVADA. AREQUIPA. 2014

OpenAIRE

SALAS LINARES, MARY JULISSA

2015-01-01

THEOBROMA CACAO GENERALIDADES DESCRIPCIÓN ORIGEN Y EXTENSIÓN CLASIFICACIÓN CIENTÍFICA VARIEDADES DEL CACAO DISTRIBUCIÓN USOS MEDICINALES EFECTO ANTICARIOGÉNICO GEL CARIES DENTAL FACTORES DE RIESGO MICROORGANISMOS IMPLICADOS EN LA CARIES DENTAL CARIES EN EL ESMALTE CLASIFICACIÓN DE LA CARIES MÉTODOS DE DETECCIÓN DE CARIES CRITERIOS ICDAS

Removal of nickel(II and palladium(II from surface waters

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V. Sharifzade

2013-04-01

Full Text Available A new sorbent was prepared using alumina and 5-Br-PADAP, and its adsorption ability for the removal of Ni(II and Pd(II from different waters was investigated. The procedure is based on retention of the analytes on the alumina load with 5-Br-PADAP at pH ~ 6. The separation/preconcentration conditions for the quantitative recoveries were investigated. The limit of detections (LOD based on three times the standard deviations of the blank, were 0.187 and 0.253 ng mL-1 for Ni(II and Pd(II, respectively. Obtained sorption capacities for 1 g sorbent were 6.0 mg Ni(II and 11.0 mg Pd(II. The linearity was maintained in the concentration range of 0.625 to 6.0 ng mL-1 for Ni(II and 0.416 to 7.0 ng mL-1 for Pd(II in the original solution. Eight replicate determinations of a mixture containing 2.0 µg mL-1 each of the elements in the final solution gave relative standard deviation of ±0.82 and ±1.12% for Ni(II and Pd(II, respectively. The proposed method was successfully applied to the determination trace amounts of Ni(II and Pd(II in the surface water samples.DOI: http://dx.doi.org/10.4314/bcse.v27i1.2

Evaluation of the computerized procedures Manual II (COPMA II)

International Nuclear Information System (INIS)

Converse, S.A.

1995-11-01

The purpose of this study was to evaluate the effects of a computerized procedure system, the Computerized Procedure Manual II (COPMA-II), on the performance and mental workload of licensed reactor operators. To evaluate COPMA-II, eight teams of two operators were trained to operate a scaled pressurized water reactor facility (SPWRF) with traditional paper procedures and with COPMA-II. Following training, each team operated the SPWRF under normal operating conditions with both paper procedures and COPMA-II. The teams then performed one of two accident scenarios with paper procedures, but performed the remaining accident scenario with COPMA-II. Performance measures and subjective estimates of mental workload were recorded for each performance trial. The most important finding of the study was that the operators committed only half as many errors during the accident scenarios with COPMA-II as they committed with paper procedures. However, time to initiate a procedure was fastest for paper procedures for accident scenario trials. For performance under normal operating conditions, there was no difference in time to initiate or to complete a procedure, or in the number of errors committed with paper procedures and with COPMA-II. There were no consistent differences in the mental workload ratings operators recorded for trials with paper procedures and COPMA-II

Efficiency of Chitosan for the Removal of Pb (II, Fe (II and Cu (II Ions from Aqueous Solutions

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Soheil Sobhanardakani

2014-09-01

Full Text Available Background: Heavy metals have been recognized as harmful environmental pollutant known to produce highly toxic effects on different organs and systems of both humans and animals. The aim of this paper is to evaluate the adsorption potential of chitosan for the removal of Pb(II, Fe(II and Cu(II ions from aqueous solutions. Methods: This study was conducted in laboratory scale. In this paper chitosan has been used as an adsorbent for the removal of Pb(II, Fe(II and Cu(II from aqueous solution. In batch tests, the effects of parameters like pH solution (1.0-8.0, initial metal concentrations (100-1000 mgL-1, contact time (5.0-150 min and adsorbent dose (1.0-7.0 g on the adsorption process were studied. Results: The results showed that the adsorption of Pb(II, Fe(II and Cu(II ions on chitosan strongly depends on pH. The experimental isothermal data were analyzed using the Langmuir and Freundlich equations and it was found that the removal process followed the Langmuir isotherm and maximum adsorption capacity for the adsorption of Pb(II, Fe(II and Cu(II ions by the chitosan were 55.5mg g−1, 71.4 mg g−1 and 59 mg g−1, respectively, under equilibrium conditions at 25±1 ºC. The adsorption process was found to be well described by the pseudo-second-order rate model. Conclusion: The obtained results showed that chitosan is a readily, available, economic adsorbent and was found suitable for removing Pb(II, Fe(II and Cu(II ions from aqueous solution.

Spectrophotometric determination of cobalt(II), nickel(II) and copper (II) with 1-(2 pyridylazo)-2-naphthol in micellar medium

International Nuclear Information System (INIS)

Shar, G.A.; Soomro, G.A.

2004-01-01

Spectrophotometric determination of cobalt(II), nickel(II) and copper(II) is carried out with 1-(2 pyridylazo)-2-naphthol as a complexing reagent in aqueous phase using non-ionic surfactant Tween 80. Beer's law is obeyed for Co(II), Ni(II) and Cu(II) over the range 0.5 - 4.0, 0.5 - 4.0 and 0.5 - 3.0 ngmL/sup -1/ with detection limit (2 σ) of 6.7, 3.2 and 3.9 ngmL/sup -1/. The max molar absorption, molar absorptivity, Sandell's sensitivity of Co(II), Ni(II) and Cu(II) are 580 nm, 570 nm and 555 nm; max (104 mol/sup -1/ cm /sup -1/) is 0.87, 1.8 and 1.6 and 6.8, 3.3 and 3.9 ng cm-2 respectively. The pH at which complex is formed for Co(II), Ni(II) and Cu(II) is 5, 5.5 and 6.5 respectively. The critical micelle concentration (CMC) of Tween 80 is 5%. The present method is compared with that of atomic absorption spectroscopy and no significant difference is noted between the two methods at 95% confidence level. The method has been applied to the determination of Co(II), Ni(II) and Cu(II) in industrial waste water and pharmaceutical samples. (author)

Synthesis, spectral characterization thermal stability, antimicrobial studies and biodegradation of starch–thiourea based biodegradable polymeric ligand and its coordination complexes with [Mn(II, Co(II, Ni(II, Cu(II, and Zn(II] metals

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Nahid Nishat

2016-09-01

Full Text Available A biodegradable polymer was synthesized by the modification reaction of polymeric starch with thiourea which is further modified by transition metals, Mn(II, Co(II, Ni(II, Cu(II and Zn(II. All the polymeric compounds were characterized by (FT-IR spectroscopy, 1H NMR spectroscopy, 13C NMR spectroscopy, UV–visible spectra, magnetic moment measurements, thermogravimetric analysis (TGA and antibacterial activities. Polymer complexes of Mn(II, Co(II and Ni(II show octahedral geometry, while polymer complexes of Cu(II and Zn(II show square planar and tetrahedral geometry, respectively. The TGA revealed that all the polymer metal complexes are more thermally stable than their parental ligand. In addition, biodegradable studies of all the polymeric compounds were also carried out through ASTM-D-5338-93 standards of biodegradable polymers by CO2 evolution method which says that coordination decreases biodegradability. The antibacterial activity was screened with the agar well diffusion method against some selected microorganisms. Among all the complexes, the antibacterial activity of the Cu(II polymer–metal complex showed the highest zone of inhibition because of its higher stability constant.

Removal of Ni (II), Co (II) and Pb (II) ions from aqueous media using ...

African Journals Online (AJOL)

Removal of Ni (II), Co (II) and Pb (II) ions from aqueous media using Starch ... The results showed that 0.025 % loaded SSMNPs gave the optimal sorption ... constants (Lagergren and Pseudo-2nd-order) for Ni2+ and Co2+ adsorption were ... Langmuir correlation coefficients showed a better fit for the adsorption isotherms.

Selective Hg(II) adsorption from aqueous solutions of Hg(II) and Pb(II) by hydrolyzed acrylamide-grafted PET films.

Science.gov (United States)

Rahman, Nazia; Sato, Nobuhiro; Sugiyama, Masaaki; Hidaka, Yoshiki; Okabe, Hirotaka; Hara, Kazuhiro

2014-01-01

Selective Hg(II) adsorption from aqueous solutions of Hg(II) and Pb(II) using hydrolyzed acrylamide (AAm)-grafted polyethylene terephthalate (PET) films was examined to explore the potential reuse of waste PET materials. Selective recovery of Hg(II) from a mixture of soft acids with similar structure, such as Hg(II) and Pb(II), is important to allow the reuse of recovered Hg(II). An adsorbent for selective Hg(II) adsorption was prepared by γ-ray-induced grafting of AAm onto PET films followed by partial hydrolysis through KOH treatment. The adsorption capacity of the AAm-grafted PET films for Hg(II) ions increased from 15 to 70 mg/g after partial hydrolysis because of the reduction of hydrogen bonding between -CONH2 groups and the corresponding improved access of metal ions to the amide groups. The prepared adsorbent was characterized by Fourier transform infrared spectroscopy and scanning electron microscopy. The absorbent film showed high selectivity for the adsorption of Hg(II) over Pb(II) throughout the entire initial metal concentration range (100-500 mg/L) and pH range (2.2-5.6) studied. The high selectivity is attributed to the ability of Hg(II) ions to form covalent bonds with the amide groups. The calculated selectivity coefficient for the adsorbent binding Hg(II) over Pb(II) was 19.2 at pH 4.5 with an initial metal concentration of 100 mg/L. Selective Hg(II) adsorption equilibrium data followed the Langmuir model and kinetic data were well fitted by a pseudo-second-order equation. The adsorbed Hg(II) and Pb(II) ions were effectively desorbed from the adsorbent film by acid treatment, and the regenerated film showed no marked loss of adsorption capacity upon reuse for selective Hg(II) adsorption.

New Mn(II, Ni(II, Cd(II, Pb(II complexes with 2-methylbenzimidazole and other ligands. Synthesis, spectroscopic characterization, crystal structure, magnetic susceptibility and biological activity studies

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Shayma A. Shaker

2016-11-01

Full Text Available Synthesis and characterization of Mn(II, Ni(II, Cd(II and Pb(II mixed ligand complexes of 2-methylbenzimidazole with other ligands have been reported. The structure of the ligands and their complexes was investigated using elemental analysis, IR, UV–Vis, (1H, 13C NMR spectroscopy, molar conductivity and magnetic susceptibility measurements. In all the studies of complexes, the 2-methylbenzimidazole behaves as a neutral monodentate ligand which is coordinated with the metal ions through the N atom. While benzotriazole behaves as a neutral bidentate ligand which is coordinated with the Ni(II ion through the two N atoms. Moreover, the N-acetylglycine behaves as a bidentate ligand which is coordinated with the Mn(II, Ni(II and Pb(II ions through the N atom and the terminal carboxyl oxygen atom. The magnetic and spectral data indicate the tetrahedral geometry for Mn(II complex, irregular tetrahedral geometry for Pb(II complex and octahedral geometry for Ni(II complex. The X-ray single crystal diffraction method was used to confirm a centrosymmetric dinuclear Cd(II complex as each two metal ions are linked by a pair of thiocyanate N = S bridge. Two 2-methylbenzimidazole N-atom donors and one terminal thiocyanate N atom complete a highly distorted square pyramid geometry around the Cd atom. Besides, different cell types were used to determine the inhibitory effect of Mn(II, Ni(II, Cd(II and Pb(II complexes on cell growth using MTT assay. Cd(II complex showed cytotoxic effect on various types of cancer cell lines with different EC50 values.

Chelation of Cu(II, Zn(II, and Fe(II by Tannin Constituents of Selected Edible Nuts

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Magdalena Karamać

2009-12-01

Full Text Available The tannin fractions isolated from hazelnuts, walnuts and almonds were characterised by colorimetric assays and by an SE-HPLC technique. The complexation of Cu(II and Zn(II was determined by the reaction with tetramethylmurexide, whereas for Fe(II, ferrozine was employed. The walnut tannins exhibited a significantly weaker reaction with the vanillin/HCl reagent than hazelnut and almond tannins, but the protein precipitation capacity of the walnut fraction was high. The SE-HPLC chromatogram of the tannin fraction from hazelnuts revealed the presence of oligomers with higher molecular weights compared to that of almonds. Copper ions were most effectively chelated by the constituents of the tannin fractions of hazelnuts, walnuts and almonds. At a 0.2 mg/assay addition level, the walnut tannins complexed almost 100% Cu(II. The Fe(II complexation capacities of the tannin fractions of walnuts and hazelnuts were weaker in comparison to that of the almond tannin fraction, which at a 2.5 mg/assay addition level, bound Fe(II by ~90%. The capacity to chelate Zn(II was quite varied for the different nut tannin fractions: almond tannins bound as much as 84% Zn(II, whereas the value for walnut tannins was only 8.7%; and for hazelnut tannins, no Zn(II chelation took place at the levels tested.

Stability constants of glutarate complexes of copper(II), zinc(II), cobalt(II) and uranyl(II) by paper electrophoresis

International Nuclear Information System (INIS)

Singh, R.K.P.; Yadava, J.R.; Yadava, K.L.

1981-01-01

Stability constants of Copper(II), Zinc(II), Cobalt(II) and Uranyl(II) glutarates have been determined by paper electrophoresis. Glutaric acid (0.005 mol dmsup(-3)) was added to the background electrolyte : 0.1 mol dmsup(-3) HClO 4 . The proportions of (CH 2 ) 3 COOH COO - and (CH 2 ) 3 C 2 O 4 2- were varied by changing the pH of the electrolyte. These anions yielded the complexes Cu(CH 2 ) 3 C 2 O 4 , [Zn(CH 2 ) 3 COOH COO] + [Co(CH 2 ) 3 COOH COO] + and UO 2 (CH 2 ) 3 C 2 O 4 whose stability constants are found to be 10sup(3.9), 10sup(2.9), 10sup(2.7) and 10sup(13.5) respectively. (author)

Pb(II), Cd(II) and Zn(II) adsorption on low grade manganese ore ...

African Journals Online (AJOL)

Low grade manganese ore (LMO) of Orissa containing 58.37% SiO2, 25.05% MnO2, 8.8% Al2O3, and 5.03% Fe2O3 as the main constituents was taken to study its adsorption behaviour for Pb(II), Cd(II) and Zn(II) from aqueous solutions. The XRD studies showed the crystalline phases to be quartz, ß-MnO2, d-MnO2 and ...

ETNOBOTÁNICA MÉDICA DE LOS INDÍGENAS CHOROTE Y SU COMPARACIÓN CON LA DE LOS CRIOLLOS DEL CHACO SEMIÁRIDO (ARGENTINA

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Gustavo F. Scarpa

2009-01-01

Full Text Available Se identifica la farmacopea vegetal que utilizan actualmente los indígenas Chorote del Chaco semiárido argentino. Se registraron 69 especies vegetales, 2 especies de hongos y un liquen con 194 usos medicinales. Se destaca el bajo porcentaje de este tipo de usos respecto al total de datos etnobotánicos recopilados para los Chorote (15 %. De su comparación con la farmacopea criolla se desprende que el 52 % de los datos resulta idéntico, por lo que se concluye que los Chorote habrían adquirido estas prácticas a manera de préstamo cultural. La farmacopea de este pueblo, entonces, fue muy reducida debido a que su medicina tradicional de corte chamanístico no involucraba antaño el uso de remedios de origen vegetal. Entre las plantas medicinales típicamente Chorote se pueden citar a Achatocarpus praecox, Cleistocactus baumannii, Echinopsis rhodotricha y Funastrum clausum. Los usos estrictamente Chorote quedarían así reducidos a 90 aplicaciones en total, principalmente como antiemenagogos, antidiarreicos, antitusivos y cicatrizantes.

Crystal Structure of Rat Carnitine Palmitoyltransferase II (CPT-II)

Energy Technology Data Exchange (ETDEWEB)

Hsiao,Y.; Jogl, G.; Esser, V.; Tong, L.

2006-01-01

Carnitine palmitoyltransferase II (CPT-II) has a crucial role in the {beta}-oxidation of long-chain fatty acids in mitochondria. We report here the crystal structure of rat CPT-II at 1.9 Angstroms resolution. The overall structure shares strong similarity to those of short- and medium-chain carnitine acyltransferases, although detailed structural differences in the active site region have a significant impact on the substrate selectivity of CPT-II. Three aliphatic chains, possibly from a detergent that is used for the crystallization, were found in the structure. Two of them are located in the carnitine and CoA binding sites, respectively. The third aliphatic chain may mimic the long-chain acyl group in the substrate of CPT-II. The binding site for this aliphatic chain does not exist in the short- and medium-chain carnitine acyltransferases, due to conformational differences among the enzymes. A unique insert in CPT-II is positioned on the surface of the enzyme, with a highly hydrophobic surface. It is likely that this surface patch mediates the association of CPT-II with the inner membrane of the mitochondria.

Multi-metals column adsorption of lead(II), cadmium(II) and manganese(II) onto natural bentonite clay.

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Alexander, Jock Asanja; Surajudeen, Abdulsalam; Aliyu, El-Nafaty Usman; Omeiza, Aroke Umar; Zaini, Muhammad Abbas Ahmad

2017-10-01

The present work was aimed at evaluating the multi-metals column adsorption of lead(II), cadmium(II) and manganese(II) ions onto natural bentonite. The bentonite clay adsorbent was characterized for physical and chemical properties using X-ray diffraction, X-ray fluorescence, Brunauer-Emmett-Teller surface area and cation exchange capacity. The column performance was evaluated using adsorbent bed height of 5.0 cm, with varying influent concentrations (10 mg/L and 50 mg/L) and flow rates (1.4 mL/min and 2.4 mL/min). The result shows that the breakthrough time for all metal ions ranged from 50 to 480 minutes. The maximum adsorption capacity was obtained at initial concentration of 10 mg/L and flow rate of 1.4 mL/min, with 2.22 mg/g of lead(II), 1.71 mg/g of cadmium(II) and 0.37 mg/g of manganese(II). The order of metal ions removal by natural bentonite is lead(II) > cadmium(II) > manganese(II). The sorption performance and the dynamic behaviour of the column were predicted using Adams-Bohart, Thomas, and Yoon-Nelson models. The linear regression analysis demonstrated that the Thomas and Yoon-Nelson models fitted well with the column adsorption data for all metal ions. The natural bentonite was effective for the treatment of wastewater laden with multi-metals, and the process parameters obtained from this work can be used at the industrial scale.

Antibacterial Co(II, Ni(II, Cu(II and Zn(II complexes with biacetyl-derived Schiff bases

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MUHAMMAD IMRAN

2010-08-01

Full Text Available The condensation reactions of biacetyl with ortho-hydroxyaniline and 2-aminobenzoic acid to form bidendate NO donor Schiff bases were studied. The prepared Schiff base ligands were further utilized for the formation of metal chelates having the general formula [ML2(H2O2] where M = Co(II, Ni(II, Cu(II and Zn(II and L = HL1 and HL2. These new compounds were characterized by conductance measurements, magnetic susceptibility measurements, elemental analysis, and IR, 1H-NMR, 13C-NMR and electronic spectroscopy. Both Schiff base ligands were found to have a mono-anionic bidentate nature and octahedral geometry was assigned to all metal complexes. All the complexes contained coordinated water which was lost at 141–160 °C. These compounds were also screened for their in vitro antibacterial activity against four bacterial species, namely: Escherichia coli, Staphylococcus aureus, Salmonella typhi and Bacillus subtilis. The metal complexes were found to have greater antibacterial activity than the uncomplexed Schiff base ligands.

SEPARATION OF Fe (III, Cr(III, Cu(II, Ni(II, Co(II, AND Pb(II METAL IONS USING POLY(EUGENYL OXYACETIC ACID AS AN ION CARRIER BY A LIQUID MEMBRANE TRANSPORT METHOD

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La Harimu

2010-06-01

Full Text Available Fe (III, Cr(III, Cu(II, Ni(II, Co(II, and Pb(II  metal ions had been separated using poly(eugenyl oxyacetic acid as an ion carrier by bulk liquid membrane transport method. The effect of pH, polyeugenyl oxyacetic acid ion carrier concentration, nitric acid concentration in the stripping solution, transport time, and metal concentration were optimized. The result showed that the optimum condition for transport of metal ions was at pH 4 for ion Fe(III and at pH 5 for Cr(III, Cu(II, Ni(II, Co(II, and Pb(II ions. The carrier volumes were optimum with concentration of 1 x 10-3 M at 7.5 mL for Cr(III, Cu (II,  Ni(II, Co(II ions and at 8.5 mL for Fe(III and Pb(II ions. The concentration of HNO3 in stripping phase was optimum at 2 M for Fe(III and Cu(II ions, 1 M for Cr(III, Ni(II and Co(II ions, and 0.5 M for Pb(II ion. The optimum transport times were 36 h for Fe(III and Co(II ions, and 48 h for Cr(III, Cu (II, Ni(II, and Pb(II ions. The concentration of metal ions accurately transported were 2.5 x 10-4 M for Fe(III and Cr(III ions, and 1 M for Cu (II, Ni(II, Co(II, and Pb(II ions. Compared to other metal ions the transport of Fe(III was the highest with selectivity order of Fe(III > Cr(III > Pb(II > Cu(II > Ni(II > Co(II. At optimum condition, Fe(III ion was transported through the membrane at 46.46%.   Keywords: poly(eugenyl oxyacetic acid, transport, liquid membrane, Fe (III, Cr(III, Cu(II, Ni(II, Co(II, and Pb(II ions

Synthesis and Characterization of Multimetallic Fe(II) and Mn(II ...

African Journals Online (AJOL)

Iron(II) and Manganese(II) complexes of the resulting ligand were obtained from its reactions with Fe(II) and Mn(II) salts in absolute methanol for the metal to ligand ratio 2:3. These complexes were characterized by Solubility, Conductivity, IR and UV-VIS spectrometry, elemental analysis and mass spectrometry. Keywords: ...

(II) complexes

African Journals Online (AJOL)

activities of Schiff base tin (II) complexes. Neelofar1 ... Conclusion: All synthesized Schiff bases and their Tin (II) complexes showed high antimicrobial and ...... Singh HL. Synthesis and characterization of tin (II) complexes of fluorinated Schiff bases derived from amino acids. Spectrochim Acta Part A: Molec Biomolec.

Fe (III), Co(II), Ni(II), Cu(II) and Zn(II) complexes of schiff bases based-on glycine and phenylalanine: Synthesis, magnetic/thermal properties and antimicrobial activity

Science.gov (United States)

Sevgi, Fatih; Bagkesici, Ugur; Kursunlu, Ahmed Nuri; Guler, Ersin

2018-02-01

Zinc (II), copper (II), nickel (II), cobalt (II) and iron (III) complexes of Schiff bases (LG, LP) derived from 2-hydroxynaphthaldehyde with glycine and phenylalanine were reported and characterized by 1H NMR, 13C NMR, elemental analyses, melting point, FT-IR, magnetic susceptibility and thermal analyses (TGA). TGA data show that iron and cobalt include to the coordinated water and metal:ligand ratio is 1:2 while the complex stoichiometry for Ni (II), Cu (II) and Zn (II) complexes is 1:1. As expected, Ni (II) and Zn (II) complexes are diamagnetic; Cu (II), Co (II) and Fe (III) complexes are paramagnetic character due to a strong ligand of LG and LP. The LG, LP and their metal complexes were screened for their antimicrobial activities against five Gram-positive (Staphylococcus aureus, Methicillin resistant Staphylococcus aureus (MRSA), Bacillus cereus, Streptococcus mutans and Enterococcus faecalis) and three Gram-negative (Escherichia coli, Klebsiella pneumoniae and Pseudomonas aeruginosa) and one fungi (Candida albicans) by using broth microdilution techniques. The activity data show that ligands and their metal complexes exhibited moderate to good activity against Gram-positive bacteria and fungi.

DNA damage by the cobalt (II) and zinc (II) complexes of ...

African Journals Online (AJOL)

Using the single cell gel electrophoresis method, the tetraazamacrocycle Zn(II) complex (Zn(II)-L) and the tetraazamacrocycle Co(II) complex (Co(II)-L) were investigated focusing on their DNA damage to Tetrahymena thermophila. When the cells were treated with the 0.05, 0.25 and 0.50 mg/ml Zn(II)-L, the tail length ...

Syntheses and spectroscopic properties of mercury(II) and nickel(II ...

African Journals Online (AJOL)

Mercury(II) complex, [Hg2(BPTU-2H)Cl2] and nickel(II) complex, [Ni(BPTU-H)2] were prepared by reacting Bis(N-phenylthiourea), BPTU, with mercury(II) chloride and nickel(II) acetate respectively. The complexes were characterized by IR, diffuse reflectance, 1H NMR spectra and elemental analysis. BPTU acts as ...

Solar Type II Radio Bursts and IP Type II Events

Science.gov (United States)

Cane, H. V.; Erickson, W. C.

2005-01-01

We have examined radio data from the WAVES experiment on the Wind spacecraft in conjunction with ground-based data in order to investigate the relationship between the shocks responsible for metric type II radio bursts and the shocks in front of coronal mass ejections (CMEs). The bow shocks of fast, large CMEs are strong interplanetary (IP) shocks, and the associated radio emissions often consist of single broad bands starting below approx. 4 MHz; such emissions were previously called IP type II events. In contrast, metric type II bursts are usually narrowbanded and display two harmonically related bands. In addition to displaying complete dynamic spectra for a number of events, we also analyze the 135 WAVES 1 - 14 MHz slow-drift time periods in 2001-2003. We find that most of the periods contain multiple phenomena, which we divide into three groups: metric type II extensions, IP type II events, and blobs and bands. About half of the WAVES listings include probable extensions of metric type II radio bursts, but in more than half of these events, there were also other slow-drift features. In the 3 yr study period, there were 31 IP type II events; these were associated with the very fastest CMEs. The most common form of activity in the WAVES events, blobs and bands in the frequency range between 1 and 8 MHz, fall below an envelope consistent with the early signatures of an IP type II event. However, most of this activity lasts only a few tens of minutes, whereas IP type II events last for many hours. In this study we find many examples in the radio data of two shock-like phenomena with different characteristics that occur simultaneously in the metric and decametric/hectometric bands, and no clear example of a metric type II burst that extends continuously down in frequency to become an IP type II event. The simplest interpretation is that metric type II bursts, unlike IP type II events, are not caused by shocks driven in front of CMEs.

Synthesis and characterization of iron(III), manganese(II), cobalt(II), nickel(II), copper(II) and zinc(II) complexes of salicylidene-N-anilinoacetohydrazone (H2L1) and 2-hydroxy-1-naphthylidene-N-anilinoacetohydrazone (H2L2).

Science.gov (United States)

AbouEl-Enein, S A; El-Saied, F A; Kasher, T I; El-Wardany, A H

2007-07-01

Salicylidene-N-anilinoacetohydrazone (H(2)L(1)) and 2-hydroxy-1-naphthylidene-N-anilinoacetohydrazone (H(2)L(2)) and their iron(III), manganese(II), cobalt(II), nickel(II), copper(II) and zinc(II) complexes have been synthesized and characterized by IR, electronic spectra, molar conductivities, magnetic susceptibilities and ESR. Mononuclear complexes are formed with molar ratios of 1:1, 1:2 and 1:3 (M:L). The IR studies reveal various modes of chelation. The electronic absorption spectra and magnetic susceptibility measurements show that the iron(III), nickel(II) and cobalt(II) complexes of H(2)L(1) have octahedral geometry. While the cobalt(II) complexes of H(2)L(2) were separated as tetrahedral structure. The copper(II) complexes have square planar stereochemistry. The ESR parameters of the copper(II) complexes at room temperature were calculated. The g values for copper(II) complexes proved that the Cu-O and Cu-N bonds are of high covalency.

The use of medicinal plants as a therapeutical resource: from the influences of the professional formation to the ethical and legal implications of its applicability as an extension of nursing care practice El uso de plantas medicinales como recurso terapéutico: de las influencias de la formación profesional a las implicaciones éticas y legales de su aplicabilidad como extensión de la práctica de cuidar de la enfermera O uso de plantas medicinais como recurso terapêutico: das influências da formação profissional às implicações éticas e legais de sua aplicabilidade como extensão da prática de cuidar realizada pela enfermeira

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Neide Aparecida Titonelli Alvim

2006-06-01

Full Text Available This qualitative research aimed to analyze the biomedical influence in the context of nurses' formation and professional activities; to reflect about ethical and legal implications of using medicinal plants in nursing care; to argue about the need to configure and delimit this resource as a legitimate instrument for expanding nursing care practice. We used the creative-sensible method and developed dynamics with a group of nurses to produce data, analyzed in the categories "the biomedical influence in the academic-professional orientation of nursing" and "ethical and legal implications in the applicability of medicinal plants in care". Results indicated the need to advance in studies on the nursing diagnosis that implies the prescription of medicinal plants, so that the client is well taken care of by nurses, thus legitimizing it as an extension of their professional practice. Not as an exclusive territory, but as shared and interdisciplinary health care action.Esta investigación cualitativa buscó analizar la influencia biomédica en el contexto de formación y actuación profesional de los enfermeros; reflejar sobre las implicaciones éticas y legales del uso de plantas medicinales en la enfermería; discutir la necesidad de configuración y delimitación de este recurso como instrumento legítimo de extensión de la práctica de enfermería. Fue utilizado el método creativo-sensible y el desarrollo de dinámicas junto con un grupo de enfermeras para producir los datos de la investigación, analizados en las categorías "la influencia biomédica en la orientación académico-profesional de enfermería" y "las implicaciones éticas y legales en la aplicabilidad de plantas medicinales en el cuidado". Los resultados señalaran la necesidad de avanzar en los estudios sobre la diagnosis de enfermería que implica en prescribir plantas medicinales para que el cliente sea bien cuidado por la enfermera y, así, se pueda legitimarla como extensi

Pecan nutshell as biosorbent to remove Cu(II), Mn(II) and Pb(II) from aqueous solutions.

Science.gov (United States)

Vaghetti, Julio C P; Lima, Eder C; Royer, Betina; da Cunha, Bruna M; Cardoso, Natali F; Brasil, Jorge L; Dias, Silvio L P

2009-02-15

In the present study we reported for the first time the feasibility of pecan nutshell (PNS, Carya illinoensis) as an alternative biosorbent to remove Cu(II), Mn(II) and Pb(II) metallic ions from aqueous solutions. The ability of PNS to remove the metallic ions was investigated by using batch biosorption procedure. The effects such as, pH, biosorbent dosage on the adsorption capacities of PNS were studied. Four kinetic models were tested, being the adsorption kinetics better fitted to fractionary-order kinetic model. Besides that, the kinetic data were also fitted to intra-particle diffusion model, presenting three linear regions, indicating that the kinetics of adsorption should follow multiple sorption rates. The equilibrium data were fitted to Langmuir, Freundlich, Sips and Redlich-Peterson isotherm models. Taking into account a statistical error function, the data were best fitted to Sips isotherm model. The maximum biosorption capacities of PNS were 1.35, 1.78 and 0.946mmolg(-1) for Cu(II), Mn(II) and Pb(II), respectively.

Physico - chemical investigation on Co(II), Ni(II), Cu(II), Zn(II), Cd(II), UO2+2 and VO+2 ions-O-(-N-3,5-dichloro-α-pyridone imino)

International Nuclear Information System (INIS)

Mathur, Praveen; Trivedi, Pradeep; Mehta, R.K.

1983-01-01

Studies on the interaction of newly synthesised ligand, O-(N-3, 5-dichloro-α-pyridone imino) benzene sulphonic acid (H 2 PB) with Co(II), Ni(II), Cu(II), Zn(II), Cd(II), UO 2 +2 and VO +2 have been carried out potentiometrically. Many physico-chemical studies on thermodynamics, elemental analysis, molecular weight, magnetic moment, conductance, electronic and IR spectra have also been made on the solid chelates and their adducts. The dissociation constants of H 2 PB and stabilities of its bivalent chelates have been evaluated potentiometrically at 25deg, 35deg and 45degC in aqueous medium (0.01M, 0.05M and 0.1M NaClO 4 ) by Bjerrum's method. The stability sequence is in agreement with the Irving-William's rule. (author)

Unsaturated b-ketoesters and their Ni(II, Cu(II and Zn(II complexes

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MUHAMMED BASHEER UMMATHUR

2009-03-01

Full Text Available A new series of b-ketoesters in which the keto group is attached to the olefinic linkage were synthesized by the reaction of methyl acetoacetate and aromatic aldehydes under specified conditions. The existence of these compounds predominantly in the intramolecularly hydrogen bonded enol form was well demonstrated from their IR, 1H-NMR and mass spectral data. Details on the formation of their [ML2] complexes with Ni(II, Cu(II and Zn(II and the nature of the bonding are discussed on the basis of analytical and spectral data.

Synthesis, spectral, thermal and antimicrobial studies on cobalt(II), nickel(II), copper(II), zinc(II) and palladium(II) complexes containing thiosemicarbazone ligand

Science.gov (United States)

El-Sawaf, Ayman K.; El-Essawy, Farag; Nassar, Amal A.; El-Samanody, El-Sayed A.

2018-04-01

The coordination characteristic of new N4-morpholinyl isatin-3-thiosemicarbazone (HL) towards Co(II), Ni(II), Cu(II), Zn(II) and Pd(II) has been studies. The structures of the complexes were described by elemental analyses, molar conductivity, magnetic, thermal and spectral (IR, UV-Vis, 1H and 13C NMR and ESR) studies. On the basis of analytical and spectral studies the ligand behaves as monobasic tridentate ONS donor forming two five membered rings towards cobalt, copper and palladium and afforded complexes of the kind [M(L)X], (Mdbnd Co, Cu or Pd; Xdbnd Cl, Br or OAc). Whereas the ligand bound to NiCl2 as neutral tridentate ONS donor and with ZnCl2 as neutral bidentate NS donor. The newly synthesized thiosemicarbazone ligand and some of its complexes were examined for antimicrobial activity against 2 gram negative bacterial strains (Escherichia coli Pseudomonas and aeruginosa), 2 gram positive bacterial strains (Streptococcus pneumoniae and Staphylococcus aureus)} and two Pathogenic fungi (Aspergillus fumigatus and Candida albicans). All metal complexes possess higher antimicrobial activity comparing with the free thiosemicarbazone ligand. The high potent activities of the complexes may arise from the coordination and chelation, which tends to make metal complexes act as more controlling and potent antimicrobial agents, thus hindering the growing of the microorganisms. The antimicrobial results also show that copper bromide complex is better antimicrobial agent as compared to the Schiff base and its metal complexes.

Equilibrium and kinetic studies of Pb(II, Cd(II and Zn(II sorption by Lagenaria vulgaris shell

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Mitić-Stojanović Dragana-Linda

2012-01-01

Full Text Available The sorption of lead, cadmium and zinc ions from aqueous solution by Lagenaria vulgaris shell biosorbent (LVB in batch system was investigated. The effect of relevant parameters such as contact time, biosorbent dosage and initial metal ions concentration was evaluated. The Pb(II, Cd(II and Zn(II sorption equilibrium (when 98% of initial metal ions were sorbed was attained within 15, 20 and 25 min, respectively. The pseudo first, pseudo-second order, Chrastil’s and intra-particle diffusion models were used to describe the kinetic data. The experimental data fitted the pseudo-second order kinetic model and intra-particle diffusion model. Removal efficiency of lead(II, cadmium(II and zinc(II ions rapidly increased with increasing biosorbent dose from 0.5 to 8.0 g dm-3. Optimal biosorbent dose was set to 4.0 g dm-3. An increase in the initial metal concentration increases the sorption capacity. The sorption data of investigated metal ions are fitted to Langmuir, Freundlich and Temkin isotherm models. Langmuir model best fitted the equilibrium data (r2 > 0.99. Maximal sorption capacities of LVB for Pb(II, Cd(II and Zn(II at 25.0±0.5°C were 0.130, 0.103 and 0.098 mM g-1, respectively. The desorption experiments showed that the LVB could be reused for six cycles with a minimum loss of the initial sorption capacity.

Recovery of Cd(II), Co(II) and Ni(II) from Chloride Medium by Solvent Extraction Using CYANEX 923 and CYANEX 272 I

International Nuclear Information System (INIS)

Ahmed, M.; El Dessouky, S.I.; El-Nadi, Y.A.; Daoud, J.A.; Saad, E.A.

2008-01-01

The paper aims to study the extraction and separation of Cd(II), Co(II) and Ni(II) from their mixtures in hydrochloric acid medium with CYANEX 923 in kerosene. Preliminary investigations showed that only Cd(II) is extracted with CYANEX 923 while Co(II) and Ni(II) are not extracted. Different parameters affecting the extraction of Cd(II) with CYANEX 923 such as hydrochloric acid, hydrogen ion, extractant and metal concentrations, temperature investigations were also investigated. The stoichiometry of the extracted metal species investigated was found to be HCdCl 3 . 2 CYANEX 923. The stripping of the extracted Cd(II) species is obtained with 0.1 M HCl solution. Co(II) was found to be extracted with CYANEX 272 at ph 5.8 leaving Ni(II) in the solution. A developed process for the sequential of Cd(II), Co(II) and Ni(II) from their mixture in hydrochloric acid medium is proposed

The type II collagen fragments Helix-II and CTX-II reveal different enzymatic pathways of human cartilage collagen degradation

DEFF Research Database (Denmark)

Charni-Ben Tabassi, N; Desmarais, S; Jensen, Anne-Christine Bay

2008-01-01

human recombinant cathepsins (Cats) and matrix-metalloproteases (MMPs). Next, we analyzed the spontaneous release of Helix-II and CTX-II from cartilage sections of patients with knee OA who were immediately deep frozen after joint replacement to preserve endogenous enzyme activity until assay. Cartilage....... Cat D was unable to digest intact cartilage. MMPs-1, -3, -7, -9, and -13 efficiently released CTX-II, but only small amount of Helix-II. Neither CTX-II nor Helix-II alone was able to reflect accurately the collagenolytic activity of Cats and MMPs as reflected by the release of hydroxyproline. In OA...

Thermal, spectral, magnetic and biological studies of thiosemicarbazones complexes with metal ions: Cu(II), Co(II), Ni(II), Fe(III), Zn(II), Mn(II) and UO2(VI)

International Nuclear Information System (INIS)

Mashaly, M.M.; Seleem, H.S.; El-Behairy, M.A.; Habib, H.A.

2004-01-01

Thiosemicarbazones ligands, isatin-3-thiosemicarbazone(HIT) and N-acetylisatin-3-thiosemicarbazone (HAIT), which have tridentate ONN coordinating sites were prepared. The complexes of both ligands with Cu(II), Co(II), Ni(II), Fe(III), Zn(II), Mn(II) and UO 2 (VI) ions were isolated. The ligands and their metal complexes were characterized by elemental analysis, IR, UV-Vis and mass spectra, also by conductance, magnetic moment and TG-DSC measurements. All the transition metal complexes have octahedral configurations, except Cu-complexes which have planar geometry and the UO 2 (VI) complexes which have coordination number 8 and may acquire the distorted dodecahedral geometry. Thermal studies explored the possibility of obtaining new complexes. Inversion from octahedral to square-planar configuration occurred upon heating the parent Ni-HIAT complex to form the corresponding pyrolytic product. The antifungal activity against the tested organisms showed that some metal complexes enhanced the activity with respect to the parent ligands. (author)

Competitive adsorption of Pb(II), Cu(II), and Zn(II) ions onto hydroxyapatite-biochar nanocomposite in aqueous solutions

Science.gov (United States)

Wang, Yu-Ying; Liu, Yu-Xue; Lu, Hao-Hao; Yang, Rui-Qin; Yang, Sheng-Mao

2018-05-01

A hydroxyapatite-biochar nanocomposite (HAP-BC) was successfully fabricated and its physicochemical properties characterized. The analyses showed that HAP nanoparticles were successfully loaded on the biochar surface. The adsorption of Pb(II), Cu(II), and Zn(II) by HAP-BC was systematically studied in single and ternary metal systems. The results demonstrated that pH affects the adsorption of heavy metals onto HAP-BC. Regarding the adsorption kinetics, the pseudo-second-order model showed the best fit for all three heavy metal ions on HAP-BC. In both single and ternary metal ion systems, the adsorption isotherm of Pb(II) by HAP-BC followed Langmuir model, while those of Cu(II) and Zn(II) fitted well with Freundlich model. The maximum adsorption capacity for each tested metal by HAP-BC was higher than that of pristine rice straw biochar (especially for Pb(II)) or those of other reported adsorbents. Therefore, HAP-BC could explore as a new material for future application in heavy metal removal.

Biosorption characteristics of copper (II), chromium (III), nickel (II), and lead (II) from aqueous solutions by Chara sp. and Cladophora sp.

Science.gov (United States)

Elmaci, Ayşe; Yonar, Taner; Ozengin, Nihan

2007-09-01

The aim of this research was to expose individual removals of copper, chromium, nickel, and lead from aqueous solutions via biosorption using nonliving algae species, Chara sp. and Cladophora sp. Optimum pH values for biosorption of copper (II), chromium (III), nickel (II), and lead (II) from aqueous solutions were determined to be 6, 7, 7, and 3 for Cladophora sp. and 5, 3, 5, and 4 for Chara sp. respectively. Maximum adsorption capacities of Chara sp. [10.54 for chromium (III) and 61.72 for lead (II)] and Cladophora sp. [6.59 for chromium (III) and 16.75 and 23.25 for lead (II)] for chromium (III) and lead (II) are similar. On the other hand, copper (II) and nickel (II) biosorption capacity of Cladophora sp. [14.28 for copper (II) and 16.75 for nickel (II)] is greater than Chara sp. [6.506 for copper (II) and 11.76 for nickel (II)]. Significantly high correlation coefficients indicated for the Langmuir adsorption isotherm models can be used to describe the equilibrium behavior of copper, chromium, nickel, and lead adsorption onto Cladophora sp. and Chara sp.

DNA damage by the cobalt (II) and zinc (II) complexes of ...

African Journals Online (AJOL)

STORAGESEVER

2008-09-03

Sep 3, 2008 ... distributed in grade 3. The results indicated that Co(II)-L induced a relatively high level of DNA damage in comparison with the level of damage induced by Zn(II)-L. Key words: Tetraazamacrocycle Zn(II) complex, tetraazamacrocycle Co(II) complex, Tetrahymena thermophila, DNA damage, the comet assay.

Synthesis and characterization of nickel(II), cobalt(II), copper(II), manganese(II), zinc(II), zirconium(IV), dioxouranium(VI) and dioxomolybdenum(VI) complexes of a new Schiff base derived from salicylaldehyde and 5-methylpyrazole-3-carbohydrazide

International Nuclear Information System (INIS)

Syamal, A.; Maurya, M.R.

1986-01-01

Synthesis of a new Schiff base derived from salicylaldehyde and 5-methylpyrazole-3-carbohydrazide, and its coordination compounds with nickel(II), cobalt(II), copper(II), manganese(II), zinc(II), zirconium(IV), dioxouranium(VI) and dioxomolybdenum(VI) are described. The ligand and the complexes have been characterized on the basis of analytical, conductance, molecular weight, i.r., electronic and n.m.r. spectra and magnetic susceptibility measurements. The stoichiometries of the complexes are represented as NiL . 3H 2 O, CoL . 2H 2 O, CuL, MnL . 2H 2 O, ZnL . H 2 O, Zr(OH) 2 (LH) 2 , Zr(OH) 2 L . 2MeOH, UO 2 L . MeOH and MoO 2 L . MeOH (where LH 2 =Schiff base). The copper(II) complex shows a subnormal magnetic moment due to antiferromagnetic exchange interaction while the nickel(II), cobalt(II) and manganese(II) complexes show normal magnetic moments at room temperature. The i.r. and n.m.r. spectral studies show that the Schiff base behaves as a dibasic and tridentate ligand coordinating through the deprotonated phenolic oxygen, enolic oxygen and azomethine nitrogen. (orig.)

Levels of Cd (II, Mn (II, Pb (II, Cu (II, and Zn (II in Common Buzzard (Buteo buteo from Sicily (Italy by Derivative Stripping Potentiometry

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P. Licata

2010-01-01

Full Text Available The purpose of this study was to determine the concentrations of heavy metals (Cd, Pb, Cu, Mn, and Zn in different organs (liver, kidney, muscle, lung, skin, and feathers of buzzards (Buteo buteo, utilized as a “biological indicator” for environmental contamination, from different areas of Sicily and to investigate the relationships between birds sex, age, and weight and metal levels in these samples. All samples of common buzzards were collected at the “Recovery Center of Wild Fauna” of Palermo, through the Zooprophilactic Institute. Potentiometric stripping analysis (PSA was used to determine the content of Cd(II, Cu(II, Mn(II, Pb(II, and Zn(II in bird tissues. For toxic metals, the highest levels of Pb were in liver and those of Cd in lung; Zn levels were higher than Cu and Mn in all tissues analyzed. The concentrations in liver, lung, kidney, and muscle could be considered as an indicative of chronic exposure to metals while the presence of metals in skin could be consequential to storing and elimination processes. The found concentrations of metals in the studied matrices required a highly sensitive method for their determination and a simple sample preparation procedure, and the proposed method was well suited for this purpose.

Effects of N source concentration and NH4(+)/NO3(-) ratio on phenylethanoid glycoside pattern in tissue cultures of Plantago lanceolata L.: a metabolomics driven full-factorial experiment with LC-ESI-MS(3.).

Science.gov (United States)

Gonda, Sándor; Kiss-Szikszai, Attila; Szűcs, Zsolt; Máthé, Csaba; Vasas, Gábor

2014-10-01

Tissue cultures of a medicinal plant, Plantago lanceolata L. were screened for phenylethanoid glycosides (PGs) and other natural products (NPs) with LC-ESI-MS(3). The effects of N source concentration and NH4(+)/NO3(-) ratio were evaluated in a full-factorial (FF) experiment. N concentrations of 10, 20, 40 and 60mM, and NH4(+)/NO3(-) ratios of 0, 0.11, 0.20 and 0.33 (ratio of NH4(+) in total N source) were tested. Several peaks could be identified as PGs, of which, 16 could be putatively identified from the MS/MS/MS spectra. N source concentration and NH4(+)/NO3(-) ratio had significant effects on the metabolome, their effects on individual PGs were different despite these metabolites were of the same biosynthethic class. Chief PGs were plantamajoside and acteoside (verbascoside), their highest concentrations were 3.54±0.83% and 1.30±0.40% of dry weight, on media 10(0.33) and 40(0.33), respectively. NH4(+)/NO3(-) ratio and N source concentration effects were examined on a set of 89 NPs. For most NPs, high increases in abundance were observed compared to Murashige-Skoog medium. Abundances of 42 and 10 NPs were significantly influenced by the N source concentration and the NH4(+)/NO3(-) ratio, respectively. Optimal media for production of different NP clusters were 10(0), 10(0.11) and 40(0.33). Interaction was observed between NH4(+)/NO3(-) ratio and N source concentration for many NPs. It was shown in simulated experiments, that one-factor at a time (OFAT) experimental designs lead to sub-optimal media compositions for production of many NPs, and alternative experimental designs (e.g. FF) should be preferred when optimizing medium N source for optimal yield of NPs. If using OFAT, the N source concentration is to be optimized first, followed by NH4(+)/NO3(-) ratio, as this reduces the likeliness of suboptimal yield results. Copyright © 2014 Elsevier Ltd. All rights reserved.

Complexes cobalt(II, zinc(II and copper(II with some newly synthesized benzimidazole derivatives and their antibacterial activity

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S. O. PODUNAVAC-KUZMANOVIC

1999-05-01

Full Text Available The preparation and properties of some complexes of cobalt(II, zinc(II and copper(II with several newly synthesized benzimidazole derivatives (L are reported. The complexes, of the general formula [MCl2L2] (M=Co(II, Zn(II and [CuCl2L(H2O], have a tetrahedral structure. The complexes were characterized by elemental analysis, molar conductivity, magnetic susceptibility measurements, IR and absorption electronic spectra. The antibacterial activitiy of the benzimidazoles and their complexes was evaluated against Erwinia carotovora subsp. carotovora and Erwinia amylovora. The complexes were found to be more toxic than the ligands.

Micellar effect on metal-ligand complexes of Co(II, Ni(II, Cu(II and Zn(II with citric acid

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Nageswara Rao Gollapalli

2009-12-01

Full Text Available Chemical speciation of citric acid complexes of Co(II, Ni(II, Cu(II and Zn(II was investigated pH-metrically in 0.0-2.5% anionic, cationic and neutral micellar media. The primary alkalimetric data were pruned with SCPHD program. The existence of different binary species was established from modeling studies using the computer program MINIQUAD75. Alkalimetric titrations were carried out in different relative concentrations (M:L:X = 1:2:5, 1:3:5, 1:5:3 of metal (M to citric acid. The selection of best chemical models was based on statistical parameters and residual analysis. The species detected were MLH, ML2, ML2H and ML2H2. The trend in variation of stability constants with change in mole fraction of the medium is explained on the basis of electrostatic and non-electrostatic forces. Distributions of the species with pH at different compositions of micellar media are also presented.

Complexes of Cu(II), Ni(II), Co(II), oxovanadium(IV) and dioxouranium(VI) with N,N'-ethylenebis (2-hydroxy-4-methylpropiophenoneimine)

International Nuclear Information System (INIS)

Patel, M.M.; Patel, M.R.; Patel, M.N.; Patel, R.P.

1982-01-01

Complexes of Cu(II), Ni(II), Co(II), oxovanadium(IV) and dioxouranium(VI) with the schiff base, N,N'-ethylenebis(2-hydroxy-4-methylpropiophenoneimine)(4-MeOHPEN), have been synthesised and characterised on the basis of elemental analyses, conductivity, magnetic moment, electronic and infrared spectral data. Square-planar structures are suggested for Cu(II), Ni(II) and Co(II) complexes while a distorted square-pyramidal structure is suggested for the oxovanadium(IV) complex. (author)

Elaboration of a Highly Porous RuII,II Analogue of HKUST-1.

Science.gov (United States)

Zhang, Wenhua; Freitag, Kerstin; Wannapaiboon, Suttipong; Schneider, Christian; Epp, Konstantin; Kieslich, Gregor; Fischer, Roland A

2016-12-19

When the dinuclear Ru II,II precursor [Ru 2 (OOCCH 3 ) 4 ] is employed under redox-inert conditions, a Ru II,II analogue of HKUST-1 was successfully prepared and characterized as a phase-pure microcrystalline powder. X-ray absorption near-edge spectroscopy confirms the oxidation state of the Ru centers of the paddle-wheel nodes in the framework. The porosity of 1371 m 2 /mmol of Ru II,II -HKUST-1 exceeds that of the parent compound HKUST1 (1049 m 2 / mmol).

Dynamic adsorption of mixtures of Rhodamine B, Pb (II), Cu (II) and Zn(II) ions on composites chitosan-silica-polyethylene glycol membrane

Science.gov (United States)

Mahatmanti, F. W.; Rengga, W. D. P.; Kusumastuti, E.; Nuryono

2018-04-01

The adsorption of a solution mixture of Rhodamine B, Pb (II), Cu (II) and Zn(II) was studied using dynamic methods employing chitosan-silica-polyethylene glycol (Ch/Si/P) composite membrane as an adsorptive membrane. The composite Ch/Si/P membrane was prepared by mixing a chitosan-based membrane with silica isolated from rice husk ash (ASP) and polyethylene glycol (PEG) as a plasticizer. The resultant composite membrane was a stronger and more flexible membrane than the original chitosan-based membrane as indicated by the maximum percentage of elongation (20.5 %) and minimum Young’s Modulus (80.5 MPa). The composite membrane also showed increased mechanical and hydrophilic properties compared to the chitosan membranes. The membrane was used as adsorption membrane for Pb (II), Cu (II), Cd (II) ions and Rhodamine B dyes in a dynamic system where the permeation and selectivity were determined. The permeation of the components was observed to be in the following order: Rhodamine B > Cd (II) > Pb (II) > Cu (II) whereas the selectivity was shown to decrease the order of Cu (II) > Pb (II) > Cd (II) > Rhodamine B.

Hyperspectral predictors for monitoring biomass production in Mediterranean mountain grasslands: Majella national park, Italy

CSIR Research Space (South Africa)

Cho, Moses A

2009-01-01

Full Text Available species include Brachypodium genuense, Briza media, Bromus erectus and 101 Festuca sp. Herbs include Helichrysum italicum, Galium verum, Trifolium pratense, Plantago 102 lanceolata, Sanguisorba officinalis and Ononis spinosa. 103 104 2.2. Field data...

KONAN J. L. et al..pmd

African Journals Online (AJOL)

SECRETARIAT

de séchage. Ces résultats mettent en relief une possible évolution des teneurs en matières organiques, de la phase juvénile à la phase adulte. Concernant le moment de la récolte des feuilles de Lippia multiflora, il apparait utile de prendre en compte l'âge. CARACTERISATIONS PHYSICO-CHIMIQUE ET. MEDICINALE.

Serum insulin-like growth factor II (IGF-II) in chronic heart failure

International Nuclear Information System (INIS)

Tong Lijun; Chen Donghai; Ji Naijun; Fan Bifu; Wang Chengyao; Mei Yibin; Li Fuyuan; Kao Yan

2004-01-01

Objective: To investigate the clinical significance of changes of serum insulin-like growth factor II (IGF-II) levels in patients with chronic heart failure. Methods: Serum IGF-II levels were measured with RIA in 132 cases of chronic heart failure and 45 controls. Results: Serum IGF-II levels were significantly higher in patients with chronic heart failure than those in the controls (t=0.033, P<0.001). IGF-II levels were highest in grade IV CHF patients (vs grade II t=3.963, P<0.01; vs grade III, t=3.578, P<0.01). In the twelve patients died in hospital, the serum IGF-II levels were significantly higher than those patients recovered (t=7.141, P<0.01). Conclusion: Serum IGF-II levels were increased in CHF patients and were highest in the most severe cases. (authors)

Ni(II, Pd(II and Pt(II complexes with ligand containing thiosemicarbazone and semicarbazone moiety: synthesis, characterization and biological investigation

Directory of Open Access Journals (Sweden)

SULEKH CHANDRA

2008-07-01

Full Text Available The synthesis of nickel(II, palladium(II and platinum(II complexes with thiosemicarbazone and semicarbazone of p-tolualdehyde are reported. All the new compounds were characterized by elemental analysis, molar conductance measurements, magnetic susceptibility measurements, mass, 1H-NMR, IR and electronic spectral studies. Based on the molar conductance measurements in DMSO, the complexes may be formulated as [Ni(L2Cl2] and [M(L2]Cl2 (where M = Pd(II and Pt(II due to their non-electrolytic and 1:2 electrolytic nature, respectively. The spectral data are consistent with an octahedral geometry around Ni(II and a square planar geometry for Pd(II and Pt(II, in which the ligands act as bidentate chelating agents, coordinated through the nitrogen and sulphur/oxygen atoms. The ligands and their metal complexes were screened in vitro against fungal species Alternaria alternata, Aspergillus niger and Fusarium odum, using the food poison technique.

Anti-inflammatory drugs interacting with Zn(II), Cd(II) and Pt(II) metal ions.

Science.gov (United States)

Dendrinou-Samara, C; Tsotsou, G; Ekateriniadou, L V; Kortsaris, A H; Raptopoulou, C P; Terzis, A; Kyriakidis, D A; Kessissoglou, D P

1998-09-01

Complexes of Zn(II), Cd(II) and Pt(II) metal ions with the anti-inflammatory drugs, 1-methyl-5-(p-toluoyl)-1H-pyrrole-2-acetic acid (Tolmetin), alpha-methyl-4-(2-methylpropyl)benzeneacetic acid (Ibuprofen), 6-methoxy-alpha-methylnaphthalene-2-acetic acid (Naproxen) and 1-(4-chlorobenzoyl)-5-methoxy-2-methyl-1H-indole-3-acetic acid (indomethacin) have been synthesized and characterized. In the structurally characterized Cd(naproxen)2 complex the anti-inflammatory drugs acts as bidentate chelate ligand coordinatively bound to metal ions through the deprotonated carboxylate group. Crystal data for 1: [C32H26O8Cd], orthorhombic, space group P22(1)2(1), a = 5.693(2) (A), b = 8.760(3) (A), c = 30.74(1) (A), V = 1533(1) A3, Z = 2. Antibacterial and growth inhibitory activity is higher than that of the parent ligands or the platinum(II) diamine compounds.

Synthesis, spectroscopic and antimicrobial properties of Co(II), Ni (II ...

African Journals Online (AJOL)

The objective of this study is to investigate the antimicrobial activity of novel Schiff base metal complexes. The resistance of micro-organisms to classical antimicrobial compounds poses a challenge to effective management and treatment of some diseases. In line with this, copper (II), nickel (II) and cobalt (II) complexes of ...

RTNS-II [Rotating Target Neutron Source II] operational summary

International Nuclear Information System (INIS)

Heikkinen, D.W.

1988-09-01

The Rotating Target Neutron Source II facility (RTNS-II) operated for over nine years. Its purpose was to provide high intensities of 14 MeV neutrons for materials studies in the fusion energy program. For the period from 1982-1987, the facility was supported by both the US (Department of Energy) and Japan (Ministry of Education, Culture, and Science). RTNS-II contains two accelerator-based neutron sources which use the T(d,n) 4 He reaction. In this paper, we will summarize the operational history of RTNS-II. Typical operating parameters are given. In addition, a brief description of the experimental program is presented. The current status and future options for the facility are discussed. 7 refs., 5 tabs

[Evaluation of serum PIVKA-II by Lumipulse PrestoII assay].

Science.gov (United States)

Hiramatsu, Kumiko; Tanaka, Yasuhito; Takagi, Kazumi; Kani, Satomi; Goto, Takaaki; Takasaka, Yoshimitsu; Matsuura, Kentaro; Sugauchi, Fuminaka; Moriyama, Kazushige; Murakami, Hiroshi; Kitajima, Sachiko; Mizokami, Masashi

2009-03-01

Measurements of serum concentrations of Des-gamma-carboxy Prothrombin (PIVKA-II) are widely used for diagnosing hepatocellular carcinoma (HCC). Recently, in Lumipulsef assay, it was reported that antibodies against alkaline phosphatase (ALP) derived from anti bleeding sheets led false high values of PIVKA-II in the patients with HCC resection. To improve the previous issue, newly developed Lumipulse PrestoII assay was examined. (1) The assay was reliable and positively correlated with the previous assays (Lumipulse f and Picolumi, R = 0.997 and 0.994 (n=115), respectively). (2) Eleven cases, which had false high values of PIVKA-II by the Lumipulsef assay, were examined by the PrestoII assay with excess of inactive ALP. The false high values of 10 cases were improved, but only one was still high. False reactivity of this case was stronger than other cases, more effective adsorption was required. (3) Comparing the absorbent activity of inactive ALP among 6 different kinds, we found inactive ALP with much higher adsorbent activity. When this inactive ALP was applied to assay, false high values of PIVKA-II were improved in all 11 cases. In conclusion, the PrestoII assay, which applies the inactive ALP with high activity, is reliable and useful for clinical screening.

(II) COMPLEX COMPOUND

African Journals Online (AJOL)

user

electrochemical sensors, as well as in various chromatographic ... were carried out using Jenway pH meter Model 3320 and a conductivity ... Figure 1: the proposed molecular structure of the copper (II) Schiff base complex. M = Cu (II) or Mn (II).

IGF-II receptors and IGF-II-stimulated glucose transport in human fat cells

International Nuclear Information System (INIS)

Sinha, M.K.; Buchanan, C.; Raineri-Maldonado, C.; Khazanie, P.; Atkinson, S.; DiMarchi, R.; Caro, J.F.

1990-01-01

Insulin-like growth factor II (IGF-II) receptors have been described in rat but not in human adipocytes. In both species, IGF-II has been reported to stimulate glucose transport by interacting with the insulin receptor. In this study, we have unequivocally demonstrated the presence of IGF-II receptors in human adipocytes. 125I-labeled IGF-II specifically binds to intact adipocytes, membranes, and lectin-purified detergent solubilized extracts. Through the use of 0.5 mM disuccinimidyl suberate, 125I-IGF-II is cross-linked to a 260-kDa protein that is identified as the IGF-II receptor by displacement experiments with unlabeled IGF-II, IGF-I, and insulin and either by immunoprecipitation or by Western blot analysis with mannose 6-phosphate receptor antibodies. The concentrations of IGF-II required for half-maximal and maximal stimulation of glucose transport in human adipocytes are 35 and 100 times more than that of insulin. The possibility of IGF-II stimulating glucose transport by interacting predominantly with the insulin receptor is suggested by the following: (1) the concentration of IGF-II that inhibits half of insulin binding is only 20 times more than that of insulin; (2) the lack of an additive effect of IGF-II and insulin for maximal stimulation of glucose transport; (3) the ability of monoclonal insulin receptor antibodies to decrease glucose transport stimulated by submaximal concentrations of both IGF-II and insulin; and (4) the ability of IGF-II to stimulate insulin receptor autophosphorylation albeit at a reduced potency when compared with insulin

Emodin (1,3,8-trihydroxy-6-methylanthraquinone): a spectrophotometric reagent for the determination of beryllium(II), magnesium(II) and calcium(II)

International Nuclear Information System (INIS)

Pal, T.; Jana, N.R.

1993-01-01

The individual determination of Be II , Mg II or Ca II by conventional spectrophotometry and simultaneous determination of Mg II and Ca II in mixtures by first-derivative spectrophotometry are possible at trace levels, using emodin (1,3,8-trihydroxy-6-methylanthraquinone) as spectrophotometric reagent. Interference from other metal species, application of these methods to rock samples and statistical analysis of the results are discussed. (author)

Synthesis and studies on Cu(II), Co(II), Ni(II) complexes of Knoevenagel β-diketone ligands

Science.gov (United States)

Sumathi, S.; Tharmaraj, P.; Sheela, C. D.; Anitha, C.

2012-11-01

Transition metal complexes of various acetylacetone based ligands of the type ML [where M = Cu(II), Ni(II), Co(II); L = 3-(aryl)-pentane-2,4-dione] have been synthesized. The structural features have been derived from their elemental analysis, magnetic susceptibility, molar conductance, IR, UV-Vis, 1H NMR, Mass and ESR spectral studies. Conductivity measurements reveal that all the complexes are non-electrolytic in nature. Spectroscopic and other analytical data of the complexes suggest octahedral geometry for other metal(II) complexes. The redox behavior of the copper(II) complexes have been studied by cyclic voltammetry. The free ligands and their metal complexes have been screened for their in vitro biological activities against the bacteria Pseudomonas aeruginosa, Escherichia coli and Staphylococcus aureus as well as the fungus Candida albicans by well diffusion method. The zone of inhibition value indicates that the most of the metal(II) complexes are found to possess increased activities compared to those of the free ligands. All synthesized compounds may serve as potential photoactive materials as indicated from their characteristic fluorescence properties. The second harmonic generation (SHG) efficiency of the ligands (L1-L3) was found to be considerable effect than that of urea and KDP (potassium dihydrogen phosphate).

Bis(tripyrazol-1-ylmethanenickel(II tetracyanidonickelate(II dihydrate

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Sean Parkin

2009-12-01

Full Text Available The title complex, [Ni(C10H10N62][Ni(CN4]·2H2O, contains an octahedral nickel(II cation and a square-planar nickel(II anion. Both the cation and the anion reside on a crystallographic center of inversion. The NiII center in the cation is coordinated by six pyrazol-1-yl rings of two chelating tripyrazol-1-ylmethane [HC(pz3] ligands, with Ni—N distances that range between 2.0647 (19 and 2.0828 (19 Å. The NiII center in the anion is coordinated by four cyanide ligands, with Ni—C distances in the range 1.869 (2–1.869 (3 Å. The [Ni(CN4]2− anions are linked by inversion-related water molecules into extended chains that run parallel to the a axis.

Interrelations between Herbage Yield, α-Tocopherol, β-Carotene, Lutein, Protein, and Fiber in Non-Leguminous Forbs, Forage Legumes, and a Grass−Clover Mixture as Affected by Harvest Date

DEFF Research Database (Denmark)

Elgersma, Anjo; Søegaard, Karen; Jensen, Søren Krogh

2015-01-01

, protein and fiber contents and analyze the effect of harvest date. We hypothesized that interrelations would be similar across investigated forage species. Four nonleguminous forbs: salad burnet (Sanguisorba minor), caraway (Carum carvi), chicory (Cichorium intybus), and ribwort plantain (Plantago...

Disposal and Reuse of Bergstrom Air Force Base, Texas. Final Environmental Impact Statement.

Science.gov (United States)

1993-07-01

Engelmannia bipinnatifida), wild honeysuckles ( Gaura spp.), mouse-eared chickweeds (Cerastium spp.), stork’s-bills (Erodium spp.), and plantains (Plantago spp...mesquite, other prominent vegetation includes Roosevelt weed (Baccharis neglecta), prickly pear (Opuntia lindheimeri ) and pencil cacti (0. leptocarpis

Synthesis and properties of complexes of copper(II), nickel(II), cobalt(II) and uranyl ions with 3-(p-tolylsulphonamido)rhodamine

International Nuclear Information System (INIS)

El-Bindary, A.A.; El-Sonbati, A.Z.

2000-01-01

Metal complexes of copper(II), nickel(II), cobalt(II) and uranyl ions with 3-(p-tolylsulphonamido)rhodamine (HL) have been prepared and characterized by chemical and thermal analyses, molar conductivity , magnetic susceptibility measurements, and infrared, electronic and EPR spectra. The visible and EPR spectra indicated that the Cu(II) complex has a tetragonal geometry. From EPR spectrum of the Cu(II) complex,various parameters were calculated. The crystal field parameters of Ni(II) complex were calculated and were found to agree fairly well with the values reported for known square pyramidal complexes. The infrared spectral studies showed a monobasic bidentate behaviour with the oxygen and nitrogen donor system. Thermal stabilities of the complexes are also reported. (author)

Adsorption study of cadmium (II) and lead (II) on radish peels

International Nuclear Information System (INIS)

Anwar, J.; Shafique, U.; Salman, M.; Zaman, W.; Memoona, M.

2009-01-01

The removal efficiency of heavy metals like Cd(II) and Pb(II) from aqueous solutions by adsorption on Raphanus sativus (Radish peels) has been studied. The effects of time, pH, concentration of adsorbent and agitation speed on adsorption have been evaluated. It is found that radish peels powder has high removal efficiency for both the metals. Batch adsorption study has shown that Cd(II) and Pb(II) has been removed up to 88% and 86% respectively. Adsorption equilibriums for both metals have been described by the Langmuir isotherm. The maximum amount of heavy metals (Q ) adsorbed at max equilibrium were 7.5 and 1.23 mg/g for Cd(II) and Pb(II) respectively as evaluated by Langmuir isotherm. It is concluded that waste materials like radish peels can be used for removal of heavy metals from aqueous streams. (author)

Plantas cubanas con efecto antiinflamatorio

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Ada Ivis Regalado Veloz

Full Text Available La actividad antiinflamatoria suscita gran interés científico en el área farmacológica, debido a que muchas enfermedades en su evolución cursan por procesos inflamatorios (artritis reumatoide, ateroesclerosis, cáncer, diabetes, gota, asma, dermatitis, trastornos neurodegenerativos y diversas dolencias menores. Las enfermedades inflamatorias constituyen un problema de salud importante, debido a la falta de medicamentos eficaces y seguros para su uso por periodos prolongados. Hoy en día se trabaja en la búsqueda de alternativas de antiinflamatorios más seguros, en el que las plantas medicinales, una de las formas más antiguas de tratamiento, constituyen una elección a considerar. En este trabajo se realizó una revisión bibliográfica, sobre especies de plantas que crecen en Cuba que le reportan propiedades farmacológicas como antinflamatorios. En la revisión de la literatura se utilizó la base de datos Medline (vía PubMed, así como revistas nacionales desde el periodo de 2000 hasta el presente, con las palabras claves "inflamación" y "plantas cubanas antiinflamatorias" o "actividad antiinflamatoria" y "plantas medicinales".

AÇÕES DE MULHERES AGRICULTORAS NO CUIDADO FAMILIAR: USO DE PLANTAS MEDICINAIS NO SUL DO BRASIL

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Ângela Roberta Alves Lima

2014-01-01

Full Text Available El estudio objetivó describir las acciones de cuidado familiar y el uso de plantas medicinales por mujeres campesinas del sur del Rio Grande do Sul. Se trata de una pesquisa cualitativa, envolviendo un grupo de 15 mujeres agricultoras del Distrito de Rincão da Cruz, del área rural de Pelotas-RS. La recolección de los datos ocurrió en 2011 y 2012. Fueron realizados observación participante, grupo focal y entrevistas individuales que resultaron en dos núcleos temáticos. El referencial teórico se embazó en Geertz y Leininger. El análisis de contenido se desarrolló en tres etapas: pre-análisis, exploración de los resultados, e interferencia e interpretación de los resultados. Se constató que las mujeres tienen conocimiento acerca de las plantas medicinales y de las enfermedades más recurrentes en la región. Estos conocimientos son utilizados en el cuidado en el contexto de la familia y en la comunidad. La persistente trayectoria de las mujeres campesinas é reconocida por los residentes de la región como una fuente de salud.

Mieles y plantas en la medicina criolla del norte de Misiones, Argentina

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Fernando Zamudio

2011-07-01

Full Text Available Se analizan los usos medicinales de los productos obtenidos de colonias de abejas silvestres, en cuanto al uso diferencial de estos recursos según las especies de abejas y el consenso de usos de mezclas que involucran mieles. Se reportaron 412 usos correspondientes a 9 taxones de abejas. Entre los productos de los nidos de estos insectos, la miel es el más utilizado como remedio, principalmente para el sistema respiratorio y como alimento funcional. La misma se emplea en diversas formas de preparación y están presentes en 61 preparados mixtos donde se combinan con plantas (39 especies, productos manufacturados (6 y de origen animal (5. Se halló consenso en el uso de algunos productos, no así en las combinaciones en las que intervienen. Las mieles de Tetragonisca fiebrigi y de Apis mellifera se destacan por su importancia y versatilidad de uso. Éstas pueden ser consideradas recursos medicinales complementarios y a priori no intercambiables. Sin embargo, las especificidades deben ser entendidas como alternativas no categóricas, cuyo uso es moldeado por otros factores como disponibilidad y acceso

New complexes of Co(II, Ni(II, Cu(II with Schiff base N,N’-bis-(3-methoxy-saliciliden-3,3’-dimethylbenzidine

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Alan Ionela

2013-01-01

Full Text Available The new N,N’-bis-(3-methoxy-saliciliden-3,3’-dimetilbenzidine (H2L Schiff base and complexes with Co(II, Ni(II and Cu(II of type [M(HLCl(H2O] (M=Co(II, Cu(II [M2L(H2O4]X2 (M=Co(II, X=ClO4 and M=Cu(II, X=NO3 and [M2L(CH3COO2] (M=Co(II, Ni(II, Cu(II were synthesised. The ligand and complexes were characterized by elemental analysis, conductibility measurements, magnetic moments at room temperature, IR, NMR, UV-VIS-NIR, EPR spectra and thermogravimetric analysis. A molar ratio of 1:1 or 1:2 between ligand and metal was determined from the elemental analysis. Except for perchlorate complex that behave as electrolyte, the rest of complexes are non-electrolytes. The spectral data suggest a tetrahedral, pseudo-tetrahedral or square-planar stereochemistry respectively, data confirmed by magnetic behaviour of complexes. The antimicrobial tests indicate a fungicide effect both for ligand and complexes.

and copper(II)

Indian Academy of Sciences (India)

Unknown

(II) and copper(II)–zinc(II) complexes. SUBODH KUMAR1, R N PATEL1*, P V KHADIKAR1 and. K B PANDEYA2. 1 Department of Chemistry, APS University, Rewa 486 003, India. 2 CSJM University, Kanpur 208 016, India e-mail: (R N Patel) ...

Determination of Lead(II), Cadmium(II) and Copper(II) in Waste-Water and Soil Extracts on Mercury Film Screen-Printed Carbon Electrodes Sensor

International Nuclear Information System (INIS)

Mohd Fairulnizal Md Noh; Tothill, I.E.

2011-01-01

A sensor incorporating a three electrodes configuration have been fabricated using low cost screen-printing technology. These electrodes couples with Square Wave Stripping Voltammetry (SWSV) has provided a convenient screening tool for on-site detection of trace levels of Pb(II), Cd(II) and Cu(II). Modification of the graphite carbon surface based on in situ deposition of mercury film has been carried out. By appropriate choice of supporting medium and optimized parameters setting such as amount of mercury used the deposition potential, deposition time, frequency and scan rate, well resolved and reproducible response for Pb(II), Cd(II) and Cu(II) were obtained. The performance characteristics of the developed mercury film screen printed carbon electrode (MFSPCE) for 120 s deposition time showed that the linear range for Cd(II), Pb(II) and Cu(II) were 10 to 200 μg L -1 . The detection limit recorded for Cd(II), Pb(II) and Cu(II) were 2, 1 and 5 μg L -1 with relative standard deviation (RSD) of 6.5 %, 6.9 % and 7.5 %, respectively. Successful applications of the sensing device to waste-water and extracted soil samples were demonstrated. (author)

Kinetic and spectroscopic investigation of CoII, NiII, and N-oxalylglycine inhibition of the FeII/α-ketoglutarate dioxygenase, TauD

International Nuclear Information System (INIS)

Kalliri, Efthalia; Grzyska, Piotr K.; Hausinger, Robert P.

2005-01-01

Co II , Ni II , and N-oxalylglycine (NOG) are well-known inhibitors of Fe II /α-ketoglutarate (αKG)-dependent hydroxylases, but few studies describe their kinetics and no spectroscopic investigations have been reported. Using taurine/αKG dioxygenase (TauD) as a paradigm for this enzyme family, time-dependent inhibition assays showed that Co II and Ni II follow slow-binding inhibition kinetics. Whereas Ni II -substituted TauD was non-chromophoric, spectroscopic studies of the Co II -substituted enzyme revealed a six-coordinate site (protein alone or with αKG) that became five-coordinate upon taurine addition. The Co II spectrum was not perturbed by a series of anions or oxidants, suggesting the Co II is inaccessible and could be used to stabilize the protein. NOG competed weakly (K i ∼ 290 μM) with αKG for binding to TauD, with the increased electron density of NOG yielding electronic transitions for NOG-Fe II -TauD and taurine-NOG-Fe II -TauD at 380 nm (ε 38 90-105 M -1 cm -1 ). The spectra of the NOG-bound TauD species did not change significantly upon oxygen exposure, arguing against the formation of an oxygen-bound state mimicking an early intermediate in catalysis

New floristic records in the Balkans: 2

DEFF Research Database (Denmark)

2006-01-01

caespitosa subsp. alpina (34), Plantago maritima subsp. serpentina (38), Thymus callieri subsp. callieri (31); Montenegro - Asperula hercegovina (73); Serbia - Allium paniculatum subsp. villosum (98), Viola obliqua (57); Turkey-in-Europe - Chamaecytisus jankae (37). subsp. (98), (57); Turkey-in-Europe - (37...

II-VI semiconductor compounds

CERN Document Server

1993-01-01

For condensed matter physicists and electronic engineers, this volume deals with aspects of II-VI semiconductor compounds. Areas covered include devices and applications of II-VI compounds; Co-based II-IV semi-magnetic semiconductors; and electronic structure of strained II-VI superlattices.

Syntheses, structures, and properties of imidazolate-bridged Cu(II)-Cu(II) and Cu(II)-Zn(II) dinuclear complexes of a single macrocyclic ligand with two hydroxyethyl pendants.

Science.gov (United States)

Li, Dongfeng; Li, Shuan; Yang, Dexi; Yu, Jiuhong; Huang, Jin; Li, Yizhi; Tang, Wenxia

2003-09-22

The imidazolate-bridged homodinuclear Cu(II)-Cu(II) complex, [(CuimCu)L]ClO(4).0.5H(2)O (1), and heterodinuclear Cu(II)-Zn(II) complex, [(CuimZnL(-)(2H))(CuimZnL(-)(H))](ClO(4))(3) (2), of a single macrocyclic ligand with two hydroxyethyl pendants, L (L = 3,6,9,16,19,22-hexaaza-6,19-bis(2-hydroxyethyl)tricyclo[22,2,2,2(11,14)]triaconta-1,11,13,24,27,29-hexaene), have been synthesized as possible models for copper-zinc superoxide dismutase (Cu(2),Zn(2)-SOD). Their crystal structures analyzed by X-ray diffraction methods have shown that the structures of the two complexes are markedly different. Complex 1 crystallizes in the orthorhombic system, containing an imidazolate-bridged dicopper(II) [Cu-im-Cu](3+) core, in which the two copper(II) ions are pentacoordinated by virtue of an N4O environment with a Cu.Cu distance of 5.999(2) A, adopting the geometry of distorted trigonal bipyramid and tetragonal pyramid, respectively. Complex 2 crystallizes in the triclinic system, containing two similar Cu-im-Zn cores in the asymmetric unit, in which both the Cu(II) and Zn(II) ions are pentacoordinated in a distorted trigonal bipyramid geometry, with the Cu.Zn distance of 5.950(1)/5.939(1) A, respectively. Interestingly, the macrocyclic ligand with two arms possesses a chairlike (anti) conformation in complex 1, but a boatlike (syn) conformation in complex 2. Magnetic measurements and ESR spectroscopy of complex 1 have revealed the presence of an antiferromagnetic exchange interaction between the two Cu(II) ions. The ESR spectrum of the Cu(II)-Zn(II) heterodinuclear complex 2 displayed a typical signal for mononuclear trigonal bipyramidal Cu(II) complexes. From pH-dependent ESR and electronic spectroscopic studies, the imidazolate bridges in the two complexes have been found to be stable over broad pH ranges. The cyclic voltammograms of the two complexes have been investigated. Both of the two complexes can catalyze the dismutation of superoxide and show rather high activity.

Syntheses of polystyrene supported chelating resin containing the Schiff base derived from salicylaldehyde and triethylene tetramine and its copper(II), nickel(II), cobalt(II), iron(III), zinc(II), cadmium(II), molybdenum(VI), zirconium(IV) and uranium(VI) complexes

International Nuclear Information System (INIS)

Syamal, A.; Singh, M.M.

1998-01-01

A new polymer-anchored chelating ligand has been synthesized by the reaction of chloromethylated polystyrene (containing 0.94 mmol of Cl per gram of resin and 1% cross-linked with divinylbenzene) and the Schiff base derived from salicylaldehyde and triethylenetetramine. A new series of polystyrene supported, Cu(II), Ni(II), Co(II), Fe(III), Zn(II), Cd(II), Zr(IV), dioxomolybdenum (VI) and dioxouranium (VI) complexes of the formulae PS-LCu, PS-LNi, PS-LCo, PS-LFeCl.DMF, PS-LZn, PS-LCd, PS-LZr(OH) 2 . DMF, PS L MoO 2 and PS-LUO 2 (where PS-LH 2 = polymer-anchored Schiff base and DMF dimethyl-formamide) have been synthesized and characterised by elemental analysis, infrared, electronic spectra and magnetic susceptibility measurements. The complexes PS-LCu, PS-LNi and PS-LCo have square planar structure, PS-LFeCl.DMF, PS-LMoO 2 and PS-LUO 2 have octahedral structure, PS L Zn and PS-LCd are tetrahedral and PS-LZr(OH) 2 .DMF is pentagonal bipyramidal. The polymer-anchored Cu(II), Co(II) and Fe(III) complexes are paramagnetic while Ni(II), Zn(II), Cd(II), Zr(IV), dioxomolybdenum(VI) and dioxouranium(VI) complexes are diamagnetic. The negative shift of the v (C=N) (azomethine) and the positive shift of v (C--O)(phenolic) are indicative of ONNO donor behaviour of the polymer-anchored Schiff base. (author)

DNA binding and biological activity of mixed ligand complexes of Cu(II, Ni(II and Co(II with quinolones and N donor ligand

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S.M M Akram

2015-10-01

Full Text Available  AbstractMixed ligand complexes of  Cu(II, Ni(II and Co(II have been synthesized by using levofloxacin and bipyridyl and characterized using spectral and analytical techniques. The binding behavior of the Ni(II and Cu(II complexes with herring sperm DNA(Hs-DNA were determined using electronic absorption titration, viscometric measurements and cyclic voltammetry measurements. The binding constant calculated  for Cu(II and Ni(II complexes are 2.0 x 104 and 4.0 x 104 M-1 respectively. Detailed analysis reveals that these metal complexes interact with DNA through intercalative binding mode. The nuclease activity of  Cu(II and Ni(II complexes with ct-DNA was carried out using agarose gel electrophoresis technique. The antioxidant activities for the synthesized complexes have been tested and the antibacterial activity for Ni(II complex was also checked.Key words: Intercalation, hypochromism, red shift and  peak potential.

Mixed ligand complexes of alkaline earth metals: Part XII. Mg(II, Ca(II, Sr(II and Ba(II complexes with 5-chlorosalicylaldehyde and salicylaldehyde or hydroxyaromatic ketones

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MITHLESH AGRAWAL

2002-04-01

Full Text Available The reactions of alkaline earth metal chlorides with 5-chlorosalicylaldehyde and salicylaldehyde, 2-hydroxyacetophenone or 2-hydroxypropiophenone have been carried out in 1 : 1 : 1 mole ratio and the mixed ligand complexes of the type MLL’(H2O2 (where M = Mg(II, Ca(II, Sr(II and Ba(II, HL = 5-chlorosalicylaldehyde and HL’ = salicylaldehyde, 2-hydroxyacetophenone or 2-hydroxypropiophenone have been isolated. These complexes were characterized by TLC, conductance measurements, IR and 1H-NMR spectra.

Intrafibrillar Mineral May be Absent in Dentinogenesis Imperfecta Type II (DI-II)

Energy Technology Data Exchange (ETDEWEB)

Pople, John A

2001-03-29

High-resolution synchrotron radiation computed tomography (SRCT) and small angle x-ray scattering (SAXS) were performed on normal and dentinogenesis imperfecta type II (DI-II) teeth. Three normal and three DI-II human third molars were used in this study. The normal molars were unerupted and had intact enamel; donors were female and ranged in age from 18-21y. The DI-II specimens, which were also unerupted with intact enamel, came from a single female donor age 20y. SRCT showed that the mineral concentration was 33% lower on average in the DI-II dentin with respect to normal dentin. The SAXS spectra from normal dentin exhibited low-angle diffraction peaks at harmonics of 67.6 nm, consistent with nucleation and growth of the apatite phase within gaps in the collagen fibrils (intrafibrillar mineralization). In contrast, the low-angle peaks were almost nonexistent in the DI-II dentin. Crystallite thickness was independent of location in both DI-II and normal dentin, although the crystallites were significantly thicker in DI-II dentin (6.8 nm (s.d. = 0.5) vs 5.1 nm (s.d. = 0.6)). The shape factor of the crystallites, as determined by SAXS, showed a continuous progression in normal dentin from roughly one-dimensional (needle-like) near the pulp to two-dimensional (plate-like) near the dentin-enamel junction. The crystallites in DI-II dentin, on the other hand, remained needle-like throughout. The above observations are consistent with an absence of intrafibrillar mineral in DI-II dentin.

Adsorption of Cu(II), Hg(II), and Ni(II) ions by modified natural wool chelating fibers

International Nuclear Information System (INIS)

Monier, M.; Ayad, D.M.; Sarhan, A.A.

2010-01-01

The graft copolymerization of ethyl acrylate (EA) onto natural wool fibers initiated by potassium persulphate and Mohr's salt redox initiator system in limited aqueous medium was carried out in heterogeneous media. Ester groups of the grafted copolymers were partially converted into hydrazide function groups followed by hydrazone formation through reaction with isatin. Also the application of the modified fibers for metal ion uptake was studied using Cu(II), Hg(II) and Ni(II). The modified chelating fibers were characterized using FTIR spectroscopy, SEM and X-ray diffraction.

Flora medicinal en San Nicolás, municipio de Malinalco, Estado de México

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Laura White-Olascoaga

2015-08-01

Full Text Available Se determinaron aspectos sobre el hábitat, uso y función de los recursos vegetales utilizados en la medicina tradicional, en la comunidad de San Nicolás, municipio de Malinalco, ubicada al sur del Estado de México. De enero de 2010 a enero de 2011 se aplicaron entrevistas a 30 hombres y mujeres, de entre 20 y 60 años de edad. La observación directa y participativa permitió verifi car la función y manejo de las plantas. Se registraron 165 especies correspondientes a 147 géneros y 70 familias de plantas vasculares. Las especies utilizadas en la medicina tradicional se agruparon en 13 clases o categorías de acuerdo con el tipo de enfermedad en que se utilizan. Las categorías de plantas medicinales que mostraron las mayores frecuencias de utilización se relacionan con el tratamiento de enfermedades del aparato digestivo, aparato respiratorio, enfermedades asociadas con la nutrición y sistema endócrino, además de las referidas como síndromes de filiación cultural.Las plantas medicinales se presentaron en dos diferentes hábitat; 45.4% son especies pertenecientes a la flora viaria y el 54.5% prosperan en agroecosistemas familiares, llamados localmente huertos o solares. Aproximadamente un tercio de las especies eran cultivadas y el resto silvestres. Tres cuartos de las especies presentan una distribución natural en América, y las demás han sido introducidas de ultramar. Los datos muestran que el mayor número de especies utilizadas para fines medicinales se encuentran en los huertos. Esto implica nuevos retos debido a que los huertos familiares tradicionales están siendo utilizados para fines diversos, como la construcción de viviendas o establecimientos comerciales, ocasionando pérdida de germoplasma in situ y en consecuencia pérdida de la biodiversidad en este territorio del subtrópico mexicano.

The Inca healer: empirical medical knowledge and magic in pre-Columbian Peru

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Elferink, Jan G. R.

2015-08-01

Full Text Available The role of medical practitioners among the Incas is addressed, based on archeological findings and especially the writings of the Spanish chroniclers. In Inca medicine a large role was reserved for religion and magic but at the same time an extensive knowledge of medicinal plants was available. As a consequence there were several types of healers who cured with a mixture of medicinal plants and religious-magic ceremonies. The hampicamayoc or ‘official in charge of medicines’ was the one who resembled somewhat the European physician of that time and was the most important type of healer. He relied largely but certainly not exclusively on the use of medicinal plants. There were also healers who cured mainly with religious-magic procedures. Surgery must have been important for the Inca healer but this is hardly reflected in the work of the Spanish chroniclers.La posición social de los profesionales de la medicina en la Cultura Inca se conoce gracias a los hallazgos arqueológicos y, sobre todo, gracias a los escritos de los cronistas españoles. En la medicina Inca, la religión y la magia ocupaban un papel destacado, aunque también era importante el conocimiento de las plantas medicinales. En consecuencia, existieron distintos tipos de curanderos que curaban con una mezcla más o menos mayor de plantas medicinales y ceremonias religiosas y mágicas. El hampicamayoc o «funcionario encargado de los medicamentos» sobresalía entre los curanderos y tenía cierto parecido con el médico europeo de la época. Su actuación se basaba sobre todo, aunque no exclusivamente, en el uso de plantas medicinales. Otros, en cambio, curaban básicamente con procedimientos mágicoreligiosos. La cirugía debió ser importante para el sanador Inca pero este hecho apenas se refleja en la obra de los cronistas españoles.

PROPOSAL OF GUIDELINE FOR CLINICAL TRIAL PROTOCOLS WITH HERBAL DRUGS

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Migdacelys Arboláez Estrada.

2007-04-01

Full Text Available SUMMARYCuba has extensive experience about herbal drugs, however only a few products get to the clinical phase of drug development. Our objective was to design new guidelines for clinical trials with herbal drugs.A detailed bibliographic search about regulatory aspects about clinical trials in Cuba and the world was done for development of the guideline. The guideline's proposed format includes: 1 Index, including the classification of the content. 2 Summary, 3 Fifteen chapters, related to the clinical trials. The guideline also propose the inclusion of annexes.A new guideline containing 15 chapters allows for writing more clear and detailed clinical trial protocols. The guideline contains the information required to guide the research staff who is interested in the validation of herbal drugs pharmacological activations from the perspective of clinical trials. RESUMEN Cuba tiene experiencia extensa sobre plantas medicinales, aunque solo algunos productos llegan a una fase clínica del desarrollo. Nuestro objetivo fué diseñar una nueva guía para ensayos clínicos con plantas medicinales.Hemos realizado una detallada búsqueda bibliográfica sobre aspectos reguladores de ensayos clínicos en Cuba y el resto del mundo para el desarrollo de la guía. El formato propuesto de la guia incluye: 1 Índice, incluyendo la clasificación de los contenidos. 2 Resumen, 3 Quince capítulos, relacionados con los ensayos clínicos. La guía también propone la inclusión de anexos.La nueva guía que contiene 15 capítulos que orientan la redacción de protocolos de ensayos clínicos más claros y más detallados. La guía contiene la información requerida para orientar al personal investigador interesado en la validación de la actividad farmacológica de las plantas medicinales desde la perspectiva de los ensayos clínicos.

Cd(II and Pb(II complexes of the polyether ionophorous antibiotic salinomycin

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Tanabe Makoto

2011-09-01

Full Text Available Abstract Background The natural polyether ionophorous antibiotics are used for the treatment of coccidiosis in poultry and ruminants. They are effective agents against infections caused by Gram-positive microorganisms. On the other hand, it was found that some of these compounds selectively bind lead(II ions in in vivo experiments, despite so far no Pb(II-containing compounds of defined composition have been isolated and characterized. To assess the potential of polyether ionophores as possible antidotes in the agriculture, a detailed study on their in vitro complexation with toxic metal ions is required. In the present paper we report for the first time the preparation and the structure elucidation of salinomycin complexes with ions of cadmium(II and lead(II. Results New metal(II complexes of the polyether ionophorous antibiotic salinomycin with Cd(II and Pb(II ions were prepared and structurally characterized by IR, FAB-MS and NMR techniques. The spectroscopic information and elemental analysis data reveal that sodium salinomycin (SalNa undergoes a reaction with heavy metal(II ions to form [Cd(Sal2(H2O2] (1 and [Pb(Sal(NO3] (2, respectively. Abstraction of sodium ions from the cavity of the antibiotic is occurring during the complexation reaction. Salinomycin coordinates with cadmium(II ions as a bidentate monoanionic ligand through the deprotonated carboxylic moiety and one of the hydroxyl groups to yield 1. Two salinomycin anions occupy the equatorial plane of the Cd(II center, while two water molecules take the axial positions of the inner coordination sphere of the metal(II cation. Complex 2 consists of monoanionic salinomycin acting in polydentate coordination mode in a molar ratio of 1: 1 to the metal ion with one nitrate ion for charge compensation. Conclusion The formation of the salinomycin heavy metal(II complexes indicates a possible antidote activity of the ligand in case of chronic/acute intoxications likely to occur in the stock

Cd(II) and Pb(II) complexes of the polyether ionophorous antibiotic salinomycin

Science.gov (United States)

2011-01-01

Background The natural polyether ionophorous antibiotics are used for the treatment of coccidiosis in poultry and ruminants. They are effective agents against infections caused by Gram-positive microorganisms. On the other hand, it was found that some of these compounds selectively bind lead(II) ions in in vivo experiments, despite so far no Pb(II)-containing compounds of defined composition have been isolated and characterized. To assess the potential of polyether ionophores as possible antidotes in the agriculture, a detailed study on their in vitro complexation with toxic metal ions is required. In the present paper we report for the first time the preparation and the structure elucidation of salinomycin complexes with ions of cadmium(II) and lead(II). Results New metal(II) complexes of the polyether ionophorous antibiotic salinomycin with Cd(II) and Pb(II) ions were prepared and structurally characterized by IR, FAB-MS and NMR techniques. The spectroscopic information and elemental analysis data reveal that sodium salinomycin (SalNa) undergoes a reaction with heavy metal(II) ions to form [Cd(Sal)2(H2O)2] (1) and [Pb(Sal)(NO3)] (2), respectively. Abstraction of sodium ions from the cavity of the antibiotic is occurring during the complexation reaction. Salinomycin coordinates with cadmium(II) ions as a bidentate monoanionic ligand through the deprotonated carboxylic moiety and one of the hydroxyl groups to yield 1. Two salinomycin anions occupy the equatorial plane of the Cd(II) center, while two water molecules take the axial positions of the inner coordination sphere of the metal(II) cation. Complex 2 consists of monoanionic salinomycin acting in polydentate coordination mode in a molar ratio of 1: 1 to the metal ion with one nitrate ion for charge compensation. Conclusion The formation of the salinomycin heavy metal(II) complexes indicates a possible antidote activity of the ligand in case of chronic/acute intoxications likely to occur in the stock farming

Synthesis and characterization of zinc(II), cadmium(II) and mercury(II) complexes with bis(bidentate) Schiff bases

International Nuclear Information System (INIS)

Das, Mrinal Kanti; Ghosh, Shyamali

1998-01-01

A few Zn(II), Cd(II) and Hg(II) complexes of the bis(bidentate) Schiff bases derived from p-phenylenediamine and salicylaldehyde (H 2 Salpphen), and o-phenylenediamine and o-vanillin (H 2 Vanophen), of the type MCl 2 .H 2 L(H 2 L = H 2 Salpphen or H 2 Vanophen) have been synthesised. The complexes have been characterized by elemental analysis, infrared, 1 H and 13 C NMR and mass spectra. (author)

Synthesis, characterization and biological studies of 2-(4-nitro phenylaminocarbonyl)benzoic acid and its complexes with Cr(III), Co(II), Ni(II), Cu(II) and Zn(II)

International Nuclear Information System (INIS)

Aqeel Ashraf, M.; Jamil Maah, M.; Yusuf, I.

2012-01-01

Cr(III), Co(II), Ni(II), Cu(II) and Zn(II) salts of 2-(4-nitro phenylaminocarbonyl)benzoic acid were characterized by physical, analytical and spectroscopic studies and checked for their in-vitro antimicrobial activity against three bacterial strains, Mycobacterium smegmatis (Gram +ve), Escherichia coli (Gram -ve), Pseudomonas aeuroginosa (Gram -ve) and three fungal strains, Nigrospora oryzae, Aspergillus niger and Candida albicans. The antimicrobial activities of the metal complexes - were found to be greater than those of 2-(4-nitro phenylaminocarbonyl)benzoic acid alone.

Adsorption of Cu(II), Hg(II), and Ni(II) ions by modified natural wool chelating fibers

Energy Technology Data Exchange (ETDEWEB)

Monier, M., E-mail: monierchem@yahoo.com [Chemistry Department, Drexel University, Philadelphia, PA (United States); Chemistry Department, Faculty of Science, Mansoura University, Mansoura (Egypt); Ayad, D.M.; Sarhan, A.A. [Chemistry Department, Faculty of Science, Mansoura University, Mansoura (Egypt)

2010-04-15

The graft copolymerization of ethyl acrylate (EA) onto natural wool fibers initiated by potassium persulphate and Mohr's salt redox initiator system in limited aqueous medium was carried out in heterogeneous media. Ester groups of the grafted copolymers were partially converted into hydrazide function groups followed by hydrazone formation through reaction with isatin. Also the application of the modified fibers for metal ion uptake was studied using Cu(II), Hg(II) and Ni(II). The modified chelating fibers were characterized using FTIR spectroscopy, SEM and X-ray diffraction.

Adsorption of Cu(II), Hg(II), and Ni(II) ions by modified natural wool chelating fibers.

Science.gov (United States)

Monier, M; Ayad, D M; Sarhan, A A

2010-04-15

The graft copolymerization of ethyl acrylate (EA) onto natural wool fibers initiated by potassium persulphate and Mohr's salt redox initiator system in limited aqueous medium was carried out in heterogeneous media. Ester groups of the grafted copolymers were partially converted into hydrazide function groups followed by hydrazone formation through reaction with isatin. Also the application of the modified fibers for metal ion uptake was studied using Cu(II), Hg(II) and Ni(II). The modified chelating fibers were characterized using FTIR spectroscopy, SEM and X-ray diffraction. 2009 Elsevier B.V. All rights reserved.

Kinetic study on adsorption of Cr(VI), Ni(II), Cd(II) and Pb(II) ions from aqueous solutions using activated carbon prepared from Cucumis melo peel

Science.gov (United States)

Manjuladevi, M.; Anitha, R.; Manonmani, S.

2018-03-01

The adsorption of Cr(VI), Ni(II), Cd(II) and Pb(II), ions from aqueous solutions by Cucumis melo peel-activated carbon was investigated under laboratory conditions to assess its potential in removing metal ions. The adsorption behavior of metal ions onto CMAC was analyzed with Elovich, intra-particle diffusion rate equations and pseudo-first-order model. The rate constant of Elovich and intra-particle diffusion on CMAC increased in the sequence of Cr(VI) > Ni(II) > Cd(II) > Pb(II). According to the regression coefficients, it was observed that the kinetic adsorption data can fit better by the pseudo-first-order model compared to the second-order Lagergren's model with R 2 > 0.957. The maximum adsorption of metal ions onto the CMAC was found to be 97.95% for Chromium(VI), 98.78% for Ni(II), 98.55% for Pb(II) and 97.96% for Cd(II) at CMAC dose of 250 mg. The adsorption capacities followed the sequence Ni(II) ≈ Pb(II) > Cr(VI) ≈ Cd(II) and Ni(II) > Pb(II) > Cd(II) > Cr(VI). The optimum adsorption conditions selected were adsorbent dosage of 250 mg, pH of 3.0 for Cr(VI) and 6.0 for Ni(II), Cd(II) and Pb(II), adsorption concentration of 250 mg/L and contact time of 180.

Taxonomy, sexuality and mating types of Diaporthe adunca

NARCIS (Netherlands)

Linders, E.G.A.; Van der Aa, H.A.

1995-01-01

The perithecial stage of the pathogenic fungus Diaporthe adunca, found for the first time since 1851 in natural populations of its host Plantago lanceolata, is described. Analysis of artificial reciprocal crosses and progeny from naturally occurring perithecia indicated that D. adunca is

21 CFR 310.545 - Drug products containing certain active ingredients offered over-the-counter (OTC) for certain uses.

Science.gov (United States)

2010-04-01

..., powdered extract Betaine hydrochloride Bismuth subcarbonate Bismuth subgallate Black radish powder Blessed... Pineapple enzymes Plantago seed Potassium citrate Pyridoxine hydrochloride (vitamin B6) Riboflavin Rice... the Federal Food, Drug, and Cosmetic Act (the Act), for which an approved new drug application under...

Native herbaceous perennials as ornamentals

DEFF Research Database (Denmark)

Larsen, Bjarne; Ørgaard, Marian

2013-01-01

Gardening with native perennials is a way to bring nature closer to urban citizens and bring up reflections on nature in a busy world. During three seasons of trialing Salvia pratensis, Dianthus deltoides, Campanula trachelium, Vincetoxicum hirundinaria, Saxifraga granulata, Plantago media and P...

Untargeted metabolic profiling reveals geography as the strongest predictor of metabolic phenotypes of a cosmopolitan weed

DEFF Research Database (Denmark)

Ahlstrand, Natalie Eva Iwanycki; Havskov Reghev, Nicoline; Markussen, Bo

2018-01-01

Plants produce a multitude of metabolites that contribute to their fitness and survival, and play a role in local adaptation to environmental conditions. The effects of environmental variation is particularly well studied within the genus Plantago, however, previous studies have largely focused...

Observations on antifertility and abortifacient herbal drugs | Shah ...

African Journals Online (AJOL)

Plur., Buddleja asiatica Lour, Chrysanthemum parthenium (L.) Bernh, Justacia adhatod L., Ricinus communis L., Zingiber officinale Roscol., Daucus crota L., Momordica charantia L., Plumbago zeylanica L., Sapindus mukorossi Gaertn., Plantago ovata Forssk, Tanacetum vulgare and Arctium lappa L. The most widely used ...

Does interspecific competition alter effects of early season ozone exposure on plants from wet grasslands? Results of a three-year experiment in open-top chambers

NARCIS (Netherlands)

Tonneijck, A.E.G.; Franzaring, J.; Brouwer, G.; Metselaar, K.; Dueck, T.A.

2004-01-01

Chronic effects of ozone on wet grassland species early in the growing season might be altered by interspecific competition. Individual plants of Holcus lanatus, Lychnis flos-cuculi, Molinia caerulea and Plantago lanceolata were grown in monocultures and in mixed cultures with Agrostis capillaris.

Standardization of radioimmunoassay for dosage of angiotensin II (ang-II) and its methodological evaluation; Padronizacao do radioimunoensaio para dosagem de angiotensina II (ang-II) e sua validacao metodologica

Energy Technology Data Exchange (ETDEWEB)

Mantovani, Milene; Mecawi, Andre S.; Elias, Lucila L.K.; Antunes-Rodrigues, Jose, E-mail: llelias@fmrp.usp.b, E-mail: antunes@fmrp.usp.b [Universidade de Sao Paulo (FMRP/USP), Ribeirao Preto, SP (Brazil). Faculdade de Medicina

2011-10-26

This paper standardizes the radioimmunoassay (RIA) for dosage of ANG-II of rats, after experimental conditions of saline hypertonic (2%), treating with losartan (antagonist of ANG-II), hydric privation, and acute hemorrhage (25%). After that, the plasmatic ANG-II was extracted for dosage of RIA, whose sensitiveness was of 1.95 pg/m L, with detection of 1.95 to 1000 pg/m L. The treatment with saline reduced the concentration of ANG-II, while the administration pf losartan, the hydric administration and the hemorrhage increase the values, related to the control group. Those results indicate variations in the plasmatic concentration of ANG-II according to the experimental protocols, validating the method for evaluation of activity renin-angiotensin

Pius II. a utrakvismus

OpenAIRE

Šimek, Milan

2009-01-01

Milan Šimek Pius II. a utrakvismus Pius II. and utraquism Based on sources work - out, the thesis aims the description and analysis of the attitude alternation of Enea Sylvio Piccolomini - Pius II to the utraquism. The conclusions stress the postulate that Pius II. did not change that attitude, but just did not succed in quelling the utraquist movement. In the sense of political background that finally led to fatal dissention among both leaders, king Jiří of Poděbrady and pope Pius II.

Biosorption of Cd(II) and Zn(II) by nostoc commune: isotherm and kinetics studies

Energy Technology Data Exchange (ETDEWEB)

Morsy, Fatthy M. [Faculty of Science, Botany Department, Assiut University, Assiut (Egypt); Hassan, Sedky H.A. [Department of Biological Environment, Kangwon National University, Kangwon-do (Korea, Republic of); Koutb, Mostafa [Faculty of Science, Botany Department, Assiut University, Assiut (Egypt); Umm Al-Qura University, Faculty of Applied Science, Biology Department, Mecca (Saudi Arabia)

2011-07-15

In this study, Nostoc commune (cyanobacterium) was used as an inexpensive and efficient biosorbent for Cd(II) and Zn(II) removal from aqueous solutions. The effect of various physicochemical factors on Cd(II) and Zn(II) biosorption such as pH 2.0-7.0, initial metal concentration 0.0-300 mg/L and contact time 0-120 min were studied. Optimum pH for removal of Cd(II) and Zn(II) was 6.0, while the contact time was 30 min at room temperature. The nature of biosorbent and metal ion interaction was evaluated by infrared (IR) technique. IR analysis of bacterial biomass revealed the presence of amino, carboxyl, hydroxyl, and carbonyl groups, which are responsible for biosorption of Cd(II) and Zn (II). The maximum biosorption capacities for Cd(II) and Zn(II) biosorption by N. commune calculated from Langmuir biosorption isotherm were 126.32 and 115.41 mg/g, respectively. The biosorption isotherm for two biosorbents fitted well with Freundlich isotherm than Langmuir model with correlation coefficient (r{sup 2} < 0.99). The biosorption kinetic data were fitted well with the pseudo-second-order kinetic model. Thus, this study indicated that the N. commune is an efficient biosorbent for the removal of Cd(II) and Zn(II) from aqueous solutions. (Copyright copyright 2011 WILEY-VCH Verlag GmbH and Co. KGaA, Weinheim)

Cadmium(II) and lead(II) adsorption onto hetero-atom functional mesoporous silica and activated carbon

Science.gov (United States)

Machida, Motoi; Fotoohi, Babak; Amamo, Yoshimasa; Mercier, Louis

2012-07-01

Adsorption of cadmium(II) and lead(II) on amino-, mercapto-functionalized mesoporous silica (HMS) and carboxylic-functionalized activated carbon (AC) were examined. The resultant isotherms fitted the Langmuir model and amino-functionalized HMS exhibited the highest adsorption capacity for both cadmium(II) and lead(II). Adsorption affinities for cadmium(II) were always greater than those for lead(II) in all three adsorbent types, while the difference between the two values was the largest for mercapto-functionalized HMS indicating a selective adsorption of cadmium(II). Influence of equilibrium solution pH on adsorption of cadmium(II), lead(II) and their binary mixtures was also studied. Carboxylic-functionalized AC adsorbed cadmium(II) and lead(II) in a wide pH range than conditions for the mercapto-functionalized HMS. It was concluded that each functional group had its own characteristics and advantages for adsorption of heavy metal ions; amino-groups showed high adsorption capacity, while mercapto-groups had good selectivity toward cadmium(II) adsorption and a wide solution pH in adsorption by carboxylic-groups were established in this study.

Cadmium(II) and lead(II) adsorption onto hetero-atom functional mesoporous silica and activated carbon

International Nuclear Information System (INIS)

Machida, Motoi; Fotoohi, Babak; Amamo, Yoshimasa; Mercier, Louis

2012-01-01

Adsorption of cadmium(II) and lead(II) on amino-, mercapto-functionalized mesoporous silica (HMS) and carboxylic-functionalized activated carbon (AC) were examined. The resultant isotherms fitted the Langmuir model and amino-functionalized HMS exhibited the highest adsorption capacity for both cadmium(II) and lead(II). Adsorption affinities for cadmium(II) were always greater than those for lead(II) in all three adsorbent types, while the difference between the two values was the largest for mercapto-functionalized HMS indicating a selective adsorption of cadmium(II). Influence of equilibrium solution pH on adsorption of cadmium(II), lead(II) and their binary mixtures was also studied. Carboxylic-functionalized AC adsorbed cadmium(II) and lead(II) in a wide pH range than conditions for the mercapto-functionalized HMS. It was concluded that each functional group had its own characteristics and advantages for adsorption of heavy metal ions; amino-groups showed high adsorption capacity, while mercapto-groups had good selectivity toward cadmium(II) adsorption and a wide solution pH in adsorption by carboxylic-groups were established in this study.

Synthesis, characterization and biological studies of metal complexes of Co (II), Ni (II), Cu (II), Zn (II) with sulphadimidine-benzylidene

International Nuclear Information System (INIS)

Tahira, F.; Imran, M.; Iqbal, J.

2009-01-01

Some novel complexes of Co (II), Ni (II), Cu (II), and Zn (II) have been synthesized with a Schiff base ligand derived from sulphadimidine and benzaldehyde. The structural features of the complexes have been determined by elemental analysis, magnetic susceptibility, conductance measurement, UV/ Vis. and infrared spectroscopy. IR studies revealed that the Schiff base ligand Sulphadimidine-benzylidene has monoanionic bidendate nature and coordinate with metal ions through nitrogen atom of azomethine (>C = N) and deprotonated -NH group. All the complexes were assigned octahedral geometry on the basis of magnetic moment and electronic spectroscopic data. Low value of conductance supports their non-electrolytic nature. The ligand, as well as its complexes were checked for their in vitro antimicrobial activities against two gram positive bacterial strains, Bacillus subtillus. Staphylococcus aureus and one gram negative Salmonella typhae and five fungal strains, Nigrospora oryzae, Curvularia lunata, Drechslera rostrata, Aspergillus niger and Candida olbicans by disc diffusion method and agar plate technique, respectively. Both the antibacterial and antitungal activities of the synthesized metal complexes were found to be more as compared to parent drug and uncomplexed ligand. All the complexes contain coordinated water, which is lost at 141-160 degree C. (author)

Mutation and biochemical analysis in carnitine palmitoyltransferase type II (CPT II) deficiency

DEFF Research Database (Denmark)

Olpin, S E; Afifi, A; Clark, S

2003-01-01

Carnitine palmitoyltransferase type II (CPT II) deficiency has three basic phenotypes, late-onset muscular (mild), infantile/juvenile hepatic (intermediate) and severe neonatal. We have measured fatty acid oxidation and CPT II activity and performed mutation studies in 24 symptomatic patients...

Elizabeth II uus kunstigalerii

Index Scriptorium Estoniae

1999-01-01

Tähistamaks oma troonile asumise 50. aastapäeva, avab Elizabeth II 6. II 2002 Buckinghami palees uue kunstigalerii, mis ehitatakse palee tiibhoonena. Arhitekt John Simpson. Elizabeth II kunstikogust

Plantago psyllium-secondary anaphylaxis. Case report

Directory of Open Access Journals (Sweden)

Rodrigo Collado-Chagoya

2018-04-01

Discussion: Most cases of anaphylaxis have been reported with psyllium ingestion, since, through that route, antigenic burden is higher. It should be noted that, even when exposure in the described patient was only by inhalation, manifestations were life-threatening.

Electrochemical, spectroscopic, and photophysical properties of structurally diverse polyazine-bridged Ru(II),Pt(II) and Os(II),Ru(II),Pt(II) supramolecular motifs.

Science.gov (United States)

Knoll, Jessica D; Arachchige, Shamindri M; Wang, Guangbin; Rangan, Krishnan; Miao, Ran; Higgins, Samantha L H; Okyere, Benjamin; Zhao, Meihua; Croasdale, Paul; Magruder, Katherine; Sinclair, Brian; Wall, Candace; Brewer, Karen J

2011-09-19

Five new tetrametallic supramolecules of the motif [{(TL)(2)M(dpp)}(2)Ru(BL)PtCl(2)](6+) and three new trimetallic light absorbers [{(TL)(2)M(dpp)}(2)Ru(BL)](6+) (TL = bpy = 2,2'-bipyridine or phen = 1,10-phenanthroline; M = Ru(II) or Os(II); BL = dpp = 2,3-bis(2-pyridyl)pyrazine, dpq = 2,3-bis(2-pyridyl)quinoxaline, or bpm = 2,2'-bipyrimidine) were synthesized and their redox, spectroscopic, and photophysical properties investigated. The tetrametallic complexes couple a Pt(II)-based reactive metal center to Ru and/or Os light absorbers through two different polyazine BL to provide structural diversity and interesting resultant properties. The redox potential of the M(II/III) couple is modulated by M variation, with the terminal Ru(II/III) occurring at 1.58-1.61 V and terminal Os(II/III) couples at 1.07-1.18 V versus Ag/AgCl. [{(TL)(2)M(dpp)}(2)Ru(BL)](PF(6))(6) display terminal M(dπ)-based highest occupied molecular orbitals (HOMOs) with the dpp(π*)-based lowest unoccupied molecular orbital (LUMO) energy relatively unaffected by the nature of BL. The coupling of Pt to the BL results in orbital inversion with localization of the LUMO on the remote BL in the tetrametallic complexes, providing a lowest energy charge separated (CS) state with an oxidized terminal Ru or Os and spatially separated reduced BL. The complexes [{(TL)(2)M(dpp)}(2)Ru(BL)](6+) and [{(TL)(2)M(dpp)}(2)Ru(BL)PtCl(2)](6+) efficiently absorb light throughout the UV and visible regions with intense metal-to-ligand charge transfer (MLCT) transitions in the visible at about 540 nm (M = Ru) and 560 nm (M = Os) (ε ≈ 33,000-42,000 M(-1) cm(-1)) and direct excitation to the spin-forbidden (3)MLCT excited state in the Os complexes about 720 nm. All the trimetallic and tetrametallic Ru-based supramolecular systems emit from the terminal Ru(dπ)→dpp(π*) (3)MLCT state, λ(max)(em) ≈ 750 nm. The tetrametallic systems display complex excited state dynamics with quenching of the (3)MLCT emission at

Synthesis, characterization and polymerization of methacrylates of copper (II), cobalt (II) and molybdenum (II). Generation of new materials

International Nuclear Information System (INIS)

Rojas Bolanos, Omar

2006-01-01

Coordination compounds of the species copper (II), cobalt (II) and molybdenum (II) with methacrylic acid were synthesized and characterized. Besides, it realized reactions of bromine addition to the doubles links of the species obtained previously, also too like reactions with dry HCl. Finally, it got hybrids materials by polymerization of the first compounds in an acrylic matrix. Research concluded with the characterization of all the products. (author) [es

Synthesis of amino functionalized magnetic graphenes composite material and its application to remove Cr(VI), Pb(II), Hg(II), Cd(II) and Ni(II) from contaminated water

International Nuclear Information System (INIS)

Guo, Xiaoyao; Du, Bin; Wei, Qin; Yang, Jian; Hu, Lihua; Yan, Liangguo; Xu, Weiying

2014-01-01

Highlights: • Graphenes magnetic composite nanoparticles (Fe 3 O 4 -GS) were used to adsorb metal ions. • The adsorption of metal ions onto Fe 3 O 4 -GS could be well interpreted by the Freundlich equation. • The adsorption of metal ions onto Fe 3 O 4 -GS fit pseudo-second order kinetic model. • Thermodynamic studies illustrated that the adsorption process was endothermic and spontaneous in nature. - Abstract: In the present study, a kind of graphenes magnetic material (Fe 3 O 4 -GS) was prepared by compositing graphene sheet with ferroferric oxide, and shown to be effictive for removing Cr(VI), Pb(II), Hg(II), Cd(II) and Ni(II) ions from aqueous solution. The synthesized sorbent was characterized by SEM, TEM, FTIR, XRD, XPS and BET, respectively. The pH ZPC value of the sorbent was estimated to be 3.5 by alkaline-titration methods. Fe 3 O 4 -GS can be simply recovered from water with magnetic separation at low magnetic field within one minute. The sorption capacities of the metals were 17.29, 27.95, 23.03, 27.83 and 22.07 mg g −1 for Cr(VI), Pb(II), Hg(II), Cd(II) and Ni(II), respectively. Kinetic data showed good correlation with pseudo-second-order equation and the Freundlich model was found to fit for the isotherm data of all the heavy metal ions. It was found that the metals sorption was accomplished mainly via chelation or ion exchange. The results of thermodynamic studies illustrate that the adsorption process was endothermic and spontaneous in nature

Removal of Pb(II), Cu(II) and Cd(II) from aqueous solution by some fungi and natural adsorbents in single and multiple metal systems

International Nuclear Information System (INIS)

Shoaib, A.; Badar, T.; Aslam, N.

2011-01-01

Six fungal and 10 natural biosorbents were analyzed for their Cu(II), Cd(II) and Pb(II) uptake capacity from single, binary and ternary metal ion system. Preliminary screening biosorption of assays revealed 2 fungi (Aspergillus niger and Cunninghamella echinulata) and three natural [Cicer arietinum husk, Moringa oleifera flower and soil (clay)] adsorbents hold considerable high adsorption efficiency and capacity for 3 meta l ions amongst the adsorbents. Further biosorption trials with five elected adsorbents showed a considerable reduction in metal uptake capability of adsorbents in binary- and ternary systems as compared to singly metal system. Cd(II) manifested the highest inhibitory effect on the biosorption of other metal ions, followed by Pb(II) and Cu(II). On account of metal preference, the selectivity order for metal ion towards the studied biomass matrices was Pb(II) (40-90%) > Cd(II) (2-53%) > Cu(II) (2-30%). (author)

Syntheses and spectroscopic properties of mercury(II) and nickel(II ...

African Journals Online (AJOL)

Syntheses and spectroscopic properties of mercury(II) and nickel(II) ... The complexes were characterized by IR, diffuse reflectance, 1H NMR spectra and elemental ... coordinating through thiolato sulphur and hydrazinic nitrogen atoms.

Activites antimicrobiennes des extraits de trios plantes medicinales ...

African Journals Online (AJOL)

Les propriétés antimicrobiennes des extraits hydroéthanoliques des feuilles de Spondias mombin L. (Anacardiaceae), de Psidium guajava L. (Myrtaceae) et de Pterocarpus santalinoides L. (Papilionadeae) sont étudiées afin de justifier leur utilisation pour le traitement des infections et toxi-infections alimentaires au Bénin.

Low-temperature Synthesis of Tin(II) Oxide From Tin(II) ketoacidoximate Precursor

KAUST Repository

Alshankiti, Buthainah

2015-01-01

Sn (II) oxide finds numerous applications in different fields such as thin film transistors1, solar cells2 and sensors.3 In this study we present the fabrication of tin monoxide SnO by using Sn (II) ketoacid oximate complexes as precursors. Tin (II

Biosorption optimization of lead(II), cadmium(II) and copper(II) using response surface methodology and applicability in isotherms and thermodynamics modeling

International Nuclear Information System (INIS)

Singh, Rajesh; Chadetrik, Rout; Kumar, Rajender; Bishnoi, Kiran; Bhatia, Divya; Kumar, Anil; Bishnoi, Narsi R.; Singh, Namita

2010-01-01

The present study was carried out to optimize the various environmental conditions for biosorption of Pb(II), Cd(II) and Cu(II) by investigating as a function of the initial metal ion concentration, temperature, biosorbent loading and pH using Trichoderma viride as adsorbent. Biosorption of ions from aqueous solution was optimized in a batch system using response surface methodology. The values of R 2 0.9716, 0.9699 and 0.9982 for Pb(II), Cd(II) and Cu(II) ions, respectively, indicated the validity of the model. The thermodynamic properties ΔG o , ΔH o , ΔE o and ΔS o by the metal ions for biosorption were analyzed using the equilibrium constant value obtained from experimental data at different temperatures. The results showed that biosorption of Pb(II) ions by T. viride adsorbent is more endothermic and spontaneous. The study was attempted to offer a better understating of representative biosorption isotherms and thermodynamics with special focuses on binding mechanism for biosorption using the FTIR spectroscopy.

Biosorption optimization of lead(II), cadmium(II) and copper(II) using response surface methodology and applicability in isotherms and thermodynamics modeling

Energy Technology Data Exchange (ETDEWEB)

Singh, Rajesh; Chadetrik, Rout; Kumar, Rajender; Bishnoi, Kiran; Bhatia, Divya; Kumar, Anil [Department of Environmental Science and Engineering, Guru Jambheshwar University of Science and Technology, Hisar 125001, Haryana (India); Bishnoi, Narsi R., E-mail: nrbishnoi@gmail.com [Department of Environmental Science and Engineering, Guru Jambheshwar University of Science and Technology, Hisar 125001, Haryana (India); Singh, Namita [Department of Bio and Nanotechnology, Guru Jambheshwar University of Science and Technology, Hisar 125001, Haryana (India)

2010-02-15

The present study was carried out to optimize the various environmental conditions for biosorption of Pb(II), Cd(II) and Cu(II) by investigating as a function of the initial metal ion concentration, temperature, biosorbent loading and pH using Trichoderma viride as adsorbent. Biosorption of ions from aqueous solution was optimized in a batch system using response surface methodology. The values of R{sup 2} 0.9716, 0.9699 and 0.9982 for Pb(II), Cd(II) and Cu(II) ions, respectively, indicated the validity of the model. The thermodynamic properties {Delta}G{sup o}, {Delta}H{sup o}, {Delta}E{sup o} and {Delta}S{sup o} by the metal ions for biosorption were analyzed using the equilibrium constant value obtained from experimental data at different temperatures. The results showed that biosorption of Pb(II) ions by T. viride adsorbent is more endothermic and spontaneous. The study was attempted to offer a better understating of representative biosorption isotherms and thermodynamics with special focuses on binding mechanism for biosorption using the FTIR spectroscopy.

Iodine capture by Hofmann-type clathrate Ni(II)(pz)[Ni(II)(CN)_4

International Nuclear Information System (INIS)

Massasso, Giovanni; Long, Jerome; Haines, Julien; Devautour-Vinot, Sabine; Maurin, Guillaume; Larionova, Joulia; Guerin, Christian; Guari, Yannick; Grandjean, Agnes; Onida, Barbara; Donnadieu, Bruno

2014-01-01

The thermally stable Hofmann-type clathrate framework Ni(II)(pz)[Ni(II)(CN)_4] (pz = pyrazine) was investigated for the efficient and reversible sorption of iodine (I_2) in the gaseous phase and in solution with a maximum adsorption capacity of 1 mol of I_2 per 1 mol of Ni(II)pz)[Ni(II)(CN)_4] in solution. (authors)

Adsorption characteristics of Pb(II) and Cu(II) ions by domestic clays

International Nuclear Information System (INIS)

Kwon, Ee Yol; Noh, Hea Ran

1990-01-01

This investigation was carried out to study the adsorption characteristics of Pb(II) and Cu(II) ions in aqueous solution by using clays of Gampo 35, Bentonite (chulwon) and Mangwoon 95 which were dug in the country. As the results, the adsorption of metal ions clays were reached equilibrium by shaking for about 40-60 minutes. In acidic solution, the adsorptivity of clays was increased as pH increased, however, Gampo 35 showed the high adsorptivity over 90% even at pH2-3. Pb(II) ion showed better removal efficiency than Cu(II) ion. The adsorptivities of adsorbents showed following order: Gampo 35>Bentonite> Mangwoon 95. The adsorption isotherms of Pb(II) ion on clays were well fitted in Freundlich's equation. Freundlich constantstion isotherms of Pb(II) ion on clays were well fitted in Freundlich's equation. Freundlich constants (1/n) of Gampo 35, Bentonite and Mangwoon 95 were 0.195, 0.271 and 0.314, respectively.(Author)

The Formation of Metal (M=Co(II), Ni(II), and Cu(II)) Complexes by Aminosilanes Immobilized within Mesoporous Molecular Sieves

International Nuclear Information System (INIS)

Park, Dong Ho; Park, Sung Soo; Choe, Sang Joon

1999-01-01

The immobilization of APTMS(3-(2-aminoethylamino)propyltrimethoxysilane) and AAPTMS(3-(2-(2-aminoethyl) aminoethylamino)propyltrimethoxysilane) on the surface of high quality mesoporous molecular sieves MCM-41 and MCM-48 have been confirmed by F.T.-IR spectroscopy, Raman spectroscopy, 29 Si solid state NMR, and a surface polarity measurement using Reichardt's dye. The formation of metal (Co(II), Ni(II), and Cu(II)) complexes by immobilized aminosilanes have been investigated by photoacoustic spectroscopy(PAS). The assignment of UV-Vis. PAS bands makes it possible to identify the structure of metal complexes within mesoporous molecular sieves. Co(II) ion may be coordinated mainly in a tetrahedral symmetry by two APTMS onto MCM-41, and in an octahedral one by two AAPTMS. Both Ni(II) and Cu(II) coordinated by aminosilanes within MCM-41 form possibly the octahedral complexes such as [Ni(APTMS) 2 (H 2 O) 2 ] 2+ , [Ni(AAPTMS) 2 ] 2+ , [Cu(APTMS) 2 (H 2 O) 2 ] 2+ , and [Cu(AAPTMS)(H 2 O) 3 ] 2+ , respectively. The PAS band shapes of complexes onto MCM-48 are similar to those of corresponding MCM-41 with the variation of PAS intensity. Most of metal ion(II) within MCM-41 and MCM-48 are coordinated by aminosilanes without the impregnation on the surface

Intrafibrillar Mineral May be Absent in Dentinogenesis Imperfecta Type II (DI-II); TOPICAL

International Nuclear Information System (INIS)

Pople, John A.

2001-01-01

High-resolution synchrotron radiation computed tomography (SRCT) and small angle x-ray scattering (SAXS) were performed on normal and dentinogenesis imperfecta type II (DI-II) teeth. Three normal and three DI-II human third molars were used in this study. The normal molars were unerupted and had intact enamel; donors were female and ranged in age from 18-21y. The DI-II specimens, which were also unerupted with intact enamel, came from a single female donor age 20y. SRCT showed that the mineral concentration was 33% lower on average in the DI-II dentin with respect to normal dentin. The SAXS spectra from normal dentin exhibited low-angle diffraction peaks at harmonics of 67.6 nm, consistent with nucleation and growth of the apatite phase within gaps in the collagen fibrils (intrafibrillar mineralization). In contrast, the low-angle peaks were almost nonexistent in the DI-II dentin. Crystallite thickness was independent of location in both DI-II and normal dentin, although the crystallites were significantly thicker in DI-II dentin (6.8 nm (s.d.= 0.5) vs 5.1 nm (s.d.= 0.6)). The shape factor of the crystallites, as determined by SAXS, showed a continuous progression in normal dentin from roughly one-dimensional (needle-like) near the pulp to two-dimensional (plate-like) near the dentin-enamel junction. The crystallites in DI-II dentin, on the other hand, remained needle-like throughout. The above observations are consistent with an absence of intrafibrillar mineral in DI-II dentin

Investigaciones actuales del empleo de Allium sativum en medicina

OpenAIRE

Eslhey María Sánchez Dominguez; Sahily Rojas Pérez; Nilvia Norma Agüero Batista

2016-01-01

Desde tiempos ancestrales el ajo Allium sativum ha sido utilizado por sus propiedades medicinales, ampliamente conocidas. Posee múltiples efectos beneficiosos; tales como: antimicrobiano, hipolipidémico, antitrombótico, actividad antitumoral, antihipertensivo, entre otras. Los compuestos sulfurados presentes en el mismo, principalmente alicina y ajoene, constituyen los principios activos responsables de las actividades biológicas referidas. Se realizó una revisión bibliográfica empleando los ...

Adsorption of Cs(I), Sr(II), Eu(III), Co(II) and Cd(II) by Al2O3

International Nuclear Information System (INIS)

Shiao, S.Y.; Egozy, Y.; Meyer, R.E.

1981-01-01

Adsorption of Cs(I), Sr(II), Eu(III), Co(II) and Cd(II) by Al 2 O 3 was carried out over a wide range of NaCl concentration and solution pH. In the medium pH region (pH 5 to 9), adsorption depends strongly on pH and less on salt concentration. However, in the high pH region (pH above 9), the salt dependence of the distribution coefficient becomes important. (author)

Synthesis, Characterization and Antimicrobial Activity of Cu(II, Co(II and Ni(II Complexes with O, N, and S Donor Ligands

Directory of Open Access Journals (Sweden)

Vidyavati Reddy

2008-01-01

Full Text Available The complexes of the type ML2 [where M = Cu(II, Co(II, and Ni(II] L = 1-phenyl-1-ene-3-(2-hydroxyphenyl-prop-2-ene with 3- substituted-5-mercapto-4-amino-1,2,4-triazoles. Schiff base ligands have been prepared by reacting 3-(2-hydroxyphenyl-1-phenylprop-2-en-1-one and 3-phenyl/pyridyl-4-amino-5-mercapto-1,2,4-triazoles in an alcoholic medium. The complexes are non-electrolytes in DMF. The resulting complexes were characterized by elemental analysis, magnetic measurements, conductivity measurements and spectral studies. The Schiff base acts as a tridentate dibasic and coordinating through the deprotonated oxygen, thioenolic sulphur and azomethine nitrogen atoms. It is found that Cu(II, Co(II, and Ni(II complexes exhibited octahedral geometry. The antimicrobial activities of ligands and its complexes were screened by cup plate method.

Shark class II invariant chain reveals ancient conserved relationships with cathepsins and MHC class II.

Science.gov (United States)

Criscitiello, Michael F; Ohta, Yuko; Graham, Matthew D; Eubanks, Jeannine O; Chen, Patricia L; Flajnik, Martin F

2012-03-01

The invariant chain (Ii) is the critical third chain required for the MHC class II heterodimer to be properly guided through the cell, loaded with peptide, and expressed on the surface of antigen presenting cells. Here, we report the isolation of the nurse shark Ii gene, and the comparative analysis of Ii splice variants, expression, genomic organization, predicted structure, and function throughout vertebrate evolution. Alternative splicing to yield Ii with and without the putative protease-protective, thyroglobulin-like domain is as ancient as the MHC-based adaptive immune system, as our analyses in shark and lizard further show conservation of this mechanism in all vertebrate classes except bony fish. Remarkable coordinate expression of Ii and class II was found in shark tissues. Conserved Ii residues and cathepsin L orthologs suggest their long co-evolution in the antigen presentation pathway, and genomic analyses suggest 450 million years of conserved Ii exon/intron structure. Other than an extended linker preceding the thyroglobulin-like domain in cartilaginous fish, the Ii gene and protein are predicted to have largely similar physiology from shark to man. Duplicated Ii genes found only in teleosts appear to have become sub-functionalized, as one form is predicted to play the same role as that mediated by Ii mRNA alternative splicing in all other vertebrate classes. No Ii homologs or potential ancestors of any of the functional Ii domains were found in the jawless fish or lower chordates. Copyright © 2011 Elsevier Ltd. All rights reserved.

COMPOSITIONS BASED ON PALLADIUM(II AND COPPER(II COMPOUNDS, HALIDE IONS, AND BENTONITE FOR OZONE DECOMPOSITION

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T. L. Rakitskaya

2017-05-01

bromide ion. For Cu(II-KBr/N-Bent composition, kinetic and calculation data show that, in the presence of bromide ions, copper(II inhibits the ozone decomposition. For Pd(II-KBr/NBent composition, it has been found that the maximum activity is attained at СPd(II = 1.02·10-5 mol/g. For bimetallic Pd(II- Cu(II-KBr/N-Bent composition, changes in τ0, τ1/2, k1/2, and Q1/2 parameters depending on a Pd(II content are similar to those for monometallic Pd(II-KBr/NBent composition; however, values of the parameters are higher for the monometallic system. Thus, the inhibiting effect of Cu(II is observed even in the presence of palladium(II.

Evolved H II regions

International Nuclear Information System (INIS)

Churchwell, E.

1975-01-01

A probable evolutionary sequence of H II regions based on six distinct types of observed objects is suggested. Two examples which may deviate from this idealized sequence, are discussed. Even though a size-mean density relation of H II regions can be used as a rough indication of whether a nebula is very young or evolved, it is argued that such a relation is not likely to be useful for the quantitative assignment of ages to H II regions. Evolved H II regions appear to fit into one of four structural types: rings, core-halos, smooth structures, and irregular or filamentary structures. Examples of each type are given with their derived physical parameters. The energy balance in these nebulae is considered. The mass of ionized gas in evolved H II regions is in general too large to trace the nebula back to single compact H II regions. Finally, the morphological type of the Galaxy is considered from its H II region content. 2 tables, 2 figs., 29 refs

Biosorption of copper(II) and lead(II) onto potassium hydroxide treated pine cone powder.

Science.gov (United States)

Ofomaja, A E; Naidoo, E B; Modise, S J

2010-08-01

Pine cone powder surface was treated with potassium hydroxide and applied for copper(II) and lead(II) removal from solution. Isotherm experiments and desorption tests were conducted and kinetic analysis was performed with increasing temperatures. As solution pH increased, the biosorption capacity and the change in hydrogen ion concentration in solution increased. The change in hydrogen ion concentration for lead(II) biosorption was slightly higher than for copper(II) biosorption. The results revealed that ion-exchange is the main mechanism for biosorption for both metal ions. The pseudo-first order kinetic model was unable to describe the biosorption process throughout the effective biosorption period while the modified pseudo-first order kinetics gave a better fit but could not predict the experimentally observed equilibrium capacities. The pseudo-second order kinetics gave a better fit to the experimental data over the temperature range from 291 to 347 K and the equilibrium capacity increased from 15.73 to 19.22 mg g(-1) for copper(II) and from 23.74 to 26.27 for lead(II). Activation energy was higher for lead(II) (22.40 kJ mol(-1)) than for copper(II) (20.36 kJ mol(-1)). The free energy of activation was higher for lead(II) than for copper(II) and the values of DeltaH* and DeltaS* indicate that the contribution of reorientation to the activation stage is higher for lead(II) than copper(II). This implies that lead(II) biosorption is more spontaneous than copper(II) biosorption. Equilibrium studies showed that the Langmuir isotherm gave a better fit for the equilibrium data indicating monolayer coverage of the biosorbent surface. There was only a small interaction between metal ions when simultaneously biosorbed and cation competition was higher for the Cu-Pb system than for the Pb-Cu system. Desorption studies and the Dubinin-Radushkevich isotherm and energy parameter, E, also support the ion-exchange mechanism. Copyright 2010 Elsevier Ltd. All rights reserved.

Spectroscopic evaluation of Co(II), Ni(II) and Cu(II) complexes derived from thiosemicarbazone and semicarbazone

Science.gov (United States)

Chandra, Sulekh; Kumar, Anil

2007-12-01

Co(II), Ni(II) and Cu(II) complexes were synthesized with thiosemicarbazone (L 1) and semicarbazone (L 2) derived from 2-acetyl furan. These complexes were characterized by elemental analysis, molar conductance, magnetic moment, mass, IR, electronic and EPR spectral studies. The molar conductance measurement of the complexes in DMSO corresponds to non-electrolytic nature. All the complexes are of high-spin type. On the basis of different spectral studies six coordinated geometry may be assigned for all the complexes except Co(L) 2(SO 4) and Cu(L) 2(SO 4) [where L = L 1 and L 2] which are of five coordinated square pyramidal geometry.

Iodometric determination of peroxydiphosphate in the presence of copper(II) or iron(II) as catalyst.

Science.gov (United States)

Kapoor, S; Sharma, P D; Gupta, Y K

1975-09-01

Peroxydiphosphate can be determined iodometrically in the presence of a large excess of potassium iodide with copper(II) or iron(II) as catalyst through the operation of the Cu(II)/Cu(I) or Fe(II)/Fe(III) cycle. The method is applicable in HClO(4), H(2)SO(4), HCl and CH(3)COOH acid media in the range 0.1-1.0M studied. Nickel, manganese(II), cobalt(II), silver, chloride and phosphate are without effect.

Quininium tetrachloridozinc(II

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Li-Zhuang Chen

2009-10-01

Full Text Available The asymmetric unit of the title compound {systematic name: 2-[hydroxy(6-methoxyquinolin-1-ium-4-ylmethyl]-8-vinylquinuclidin-1-ium tetrachloridozinc(II}, (C20H26N2O2[ZnCl4], consists of a double protonated quininium cation and a tetrachloridozinc(II anion. The ZnII ion is in a slightly distorted tetrahedral coordination environment. The crystal structure is stabilized by intermolecular N—H...Cl and O—H...Cl hydrogen bonds.

Synthesis, characterization and biological studies of 2-(4-nitrophenylamino-carbonyl)benzoic acid and its complexes with Cr(III), Co(II), Ni(II), Cu(II) and Zn(II)

International Nuclear Information System (INIS)

Imran, M; Nazir, S.; Latif, S.; Mahmood, Z.

2010-01-01

Cr(III), Co(II), Ni(II), Cu(II) and Zn(II) complexes of 2-(4-Nitrophenyl aminocarbonyl)benzoic acid were synthesized and characterized on the basis of physical, analytical and spectroscopic data. The ligands, as well as its metal complexes were checked for their in-vitro antimicrobial activity against three bacterial strains, Mycobacterium smegmatis, Escherichia coli, Pseudomonas aeuroginosa, and three fungal strains, Nigrospora oryzae, Aspergillus niger and Candida albicans. Disc diffusion method and Tube diffusion test were used for antibacterial and antifungal activities, respectively. The synthesized complexes only show significant antifungal activity but inactive for antibacterial, however, in general, the metal complexes were found to be more active against antimicrobial activities as compared to their un complexed ligand. (author)

Enhanced removal of Cd(II) and Pb(II) by composites of mesoporous carbon stabilized alumina

Energy Technology Data Exchange (ETDEWEB)

Yang, Weichun [Department of Environmental Engineering, School of Metallurgy and Environment, Central South University, Lushan South Road 932, Changsha 410017 (China); Chinese National Engineering Research Center for Control & Treatment of Heavy Metal Pollution, Lushan South Road 932, Changsha 410017 (China); Tang, Qiongzhi; Wei, Jingmiao; Ran, Yajun [Department of Environmental Engineering, School of Metallurgy and Environment, Central South University, Lushan South Road 932, Changsha 410017 (China); Chai, Liyuan [Department of Environmental Engineering, School of Metallurgy and Environment, Central South University, Lushan South Road 932, Changsha 410017 (China); Chinese National Engineering Research Center for Control & Treatment of Heavy Metal Pollution, Lushan South Road 932, Changsha 410017 (China); Wang, Haiying, E-mail: haiyw25@163.com [Department of Environmental Engineering, School of Metallurgy and Environment, Central South University, Lushan South Road 932, Changsha 410017 (China); Chinese National Engineering Research Center for Control & Treatment of Heavy Metal Pollution, Lushan South Road 932, Changsha 410017 (China)

2016-04-30

Graphical abstract: - Highlights: • Mesoporous carbon stabilized alumina was prepared by one-pot hard-templating method. • MC/Al{sub 2}O{sub 3} showed excellent performance for Cd(II) and Pb(II) adsorption. • Enhanced adsorption was due to the high surface area and special functional groups. - Abstract: A novel adsorbent of mesoporous carbon stabilized alumina (MC/Al{sub 2}O{sub 3}) was synthesized through one-pot hard-templating method. The adsorption potential of MC/Al{sub 2}O{sub 3} for Cd(II) and Pb(II) from aqueous solution was investigated compared with the mesoporous carbon. The results indicated the MC/Al{sub 2}O{sub 3} showed excellent performance for Cd(II) and Pb(II) removal, the adsorption capacity reached 49.98 mg g{sup −1} for Cd(II) with initial concentration of 50 mg L{sup −1} and reached 235.57 mg g{sup −1} for Pb(II) with initial concentration of 250 mg L{sup −1}, respectively. The kinetics data of Cd(II) adsorption demonstrated that the Cd(II) adsorption rate was fast, and the removal efficiencies with initial concentration of 10 and 50 mg L{sup −1} can reach up 99% within 5 and 20 min, respectively. The pseudo-second-order kinetic model could describe the kinetics of Cd(II) adsorption well, indicating the chemical reaction was the rate-controlling step. The mechanism for Cd(II) and Pb(II) adsorption by MC/Al{sub 2}O{sub 3} was investigated by X-ray photoelectron spectroscopy (XPS) and Fourier transformed infrared spectroscopy (FTIR), and the results indicated that the excellent performance for Cd(II) and Pb(II) adsorption of MC/Al{sub 2}O{sub 3} was mainly attributed to its high surface area and the special functional groups of hydroxy-aluminum, hydroxyl, carboxylic through the formation of strong surface complexation or ion-exchange. It was concluded that MC/Al{sub 2}O{sub 3} can be recognized as an effective adsorbent for removal of Cd(II) and Pb(II) in aqueous solution.

The effect of different treatments on improving seed germination ...

African Journals Online (AJOL)

Creating optimal conditions for germination of medicinal plants seed is essential for their cultivation. Therefore, to evaluate the effect of different treatments on seed germination of two medicinal species, Descurainia sophia and Plantago ovata collected in 2009 from Tehran Province, an experiment with a factorial ...

Effects of Vermi-compost Fertilizer Application and Foliar Spraying on Yield and Yield Component of Isabgol (Plantago ovate L. Medicinal Plant

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Asghar Rahimi

2017-12-01

Full Text Available Introduction Vermi-compost is the ability of some species of earthworms to consume and break down a wide range of organic residues such as sewage sludge, animal wastes, crop residues and industrial refuse. Vermi-composts are usually more stable than their parent materials with increased availability of nutrients and improved physicochemical and microbiological properties. Aerial compost tea contains high populations of live microorganism consisting of rhizobactria, trichoderma and pseudomonas species which increase the growth and yield of the plant. Acid humic is the main humic substance and the important ingredient of soil organic matter (humus which causes increase of yield and quality of crop. The aim of this research is evaluating the effect of vermi-compost and foliar application of compost tea and acid humic on yield, yield component and mucilage content of isabgol. Vermiwash as the extract of vermi-compost is liquid organic fertilizer obtained from unit of vermiculture and vermi-compost as drainage. It is used as a foliar spraying on the leaf. Vermiwash stimulate and increase the yield of crop products and foliar application of vermiwash can be caused of plant resistance to different factors and can prevent leaf necrosis. Material and Methods In order to study the effect of vermi-compost and foliar application of tea compost and acid humic on growth indices of isabgol (Plantago ovata, an experiment was conducted as a factorial based on complete randomized design with three replications in agricultural research farm at Vali-e-Asr University of Rafsanjan. Treatments were included application of vermi-compost (0 (control, 4, 8, 12 and 16 t.ha-1 and 3 levels of foliar application (distilled water as control, acid humic and compost tea. Samples for evaluating of yield, yield components and mucilage content were taken from 1 m2 area of each treatment. Tea compost solution prepared using mix of vermi-compost, acid humic, yeast and alga extract

Simultaneous Determination of Cobalt (II and Nickel (II By First Order Derivative Spectrophotometry in Micellar Media

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Rajni Rohilla

2012-01-01

Full Text Available A first-derivative spectrophotometry method for the simultaneous determination of Co (II and Ni (II with Alizarin Red S in presence of Triton X-100 is described. Measurements were made at the zero-crossing wavelengths at 549.0 nm for Co (II and 546.0 nm for Ni (II. The linearity is obtained in the range of 0.291- 4.676 μg/ml of Ni (II and 0.293- 4.124 μg/ml of Co (II in the presence of each other by using first derivative spectrophotometric method. The possible interfering effects of various ions were studied. The validity of the method was examined by using synthetic mixtures of Co (II and Ni (II. The developed derivative procedure, using the zero crossing technique, has been successfully applied for the simultaneous analysis of Co (II and Ni (II in spiked water samples.

Synthesis and Characterization of Cu(II), Co(II) and Ni(II) Complexes of Trithiocyanuric Acid: The Structure of {N,N'-Bis(3-Aminopropyl)-1,3-Propanediamine}-(Trithiocyanurato)Nickel(II)

Czech Academy of Sciences Publication Activity Database

Kopel, P.; Trávníček, Zdeněk; Kvítek, L.; Černošek, Z.; Wrzeszcz, G.; Marek, J.

2003-01-01

Roč. 56, č. 1 (2003), s. 1-11 ISSN 0095-8972 R&D Projects: GA ČR GA203/00/0152; GA AV ČR IBS5038351 Institutional research plan: CEZ:AV0Z5038910 Keywords : Copper(II) * cobalt(II) and nickel(II) complexes * Trithiocyanuric acid Subject RIV: CE - Biochemistry Impact factor: 0.841, year: 2003

Antimicrobial and mutagenic activity of some carbono- and thiocarbonohydrazone ligands and their copper(II), iron(II) and zinc(II) complexes.

Science.gov (United States)

Bacchi, A; Carcelli, M; Pelagatti, P; Pelizzi, C; Pelizzi, G; Zani, F

1999-06-15

Several mono- and bis- carbono- and thiocarbonohydrazone ligands have been synthesised and characterised; the X-ray diffraction analysis of bis(phenyl 2-pyridyl ketone) thiocarbonohydrazone is reported. The coordinating properties of the ligands have been studied towards Cu(II), Fe(II), and Zn(II) salts. The ligands and the metal complexes were tested in vitro against Gram positive and Gram negative bacteria, yeasts and moulds. In general, the bisthiocarbonohydrazones possess the best antimicrobial properties and Gram positive bacteria are the most sensitive microorganisms. Bis(ethyl 2-pyridyl ketone) thiocarbonohydrazone, bis(butyl 2-pyridyl ketone)thiocarbonohydrazone and Cu(H2nft)Cl2 (H2nft, bis(5-nitrofuraldehyde)thiocarbonohydrazone) reveal a strong activity with minimum inhibitory concentrations of 0.7 microgram ml-1 against Bacillus subtilis and of 3 micrograms ml-1 against Staphylococcus aureus. Cu(II) complexes are more effective than Fe(II) and Zn(II) ones. All bisthiocarbono- and carbonohydrazones are devoid of mutagenic properties, with the exception of the compounds derived from 5-nitrofuraldehyde. On the contrary a weak mutagenicity, that disappears in the copper complexes, is exhibited by monosubstituted thiocarbonohydrazones.

Daily variation patterns of airborne allergenic pollen in southwestern Spain.

Science.gov (United States)

González Minero, F J; Candau, P; Tomás, C; Morales, J

1998-01-01

The study was carried out using a Burkard sampler installed on the roof terrace of the School of Pharmacy, Seville, for two years (1995 and 1996). Eight pollen types described in the literature as having allergenic activity were chosen. They were Poaceae, Olea europaea, Chenopodiaceae/Amaranthaceae, Plantago, Rumex, Urticaceae (including Parietaria), Cupressaceae, and Platanus hispanica. The types were grouped according to the similarity of their pattern of intradiurnal variation in pollen concentration. The following associations were established by multivariate analysis: Urticaceae and Chenopodiaceae/Amaranthaceae (appearing mainly between 11:00 and 20:00), Olea europaea and Plantago (12:00 to 19:00), Poaceae and Rumex (appearing throughout the day), and Cupressaceae and Platanus hispanica (8:00 to 14:00). The patterns of intradiurnal variation were similar both years for each type, despite the fact that the two years were climatologically different (1995 was dry and 1996 wet). We conclude that these behavior patterns are endogenous to the plants, and are hardly affected by meteorological parameters.

Chemically modified activated carbon with 1-acylthiosemicarbazide for selective solid-phase extraction and preconcentration of trace Cu(II), Hg(II) and Pb(II) from water samples.

Science.gov (United States)

Gao, Ru; Hu, Zheng; Chang, Xijun; He, Qun; Zhang, Lijun; Tu, Zhifeng; Shi, Jianping

2009-12-15

A new sorbent 1-acylthiosemicarbazide-modified activated carbon (AC-ATSC) was prepared as a solid-phase extractant and applied for removing of trace Cu(II), Hg(II) and Pb(II) prior to their determination by inductively coupled plasma optical emission spectrometry (ICP-OES). The separation/preconcentration conditions of analytes were investigated, including effects of pH, the shaking time, the sample flow rate and volume, the elution condition and the interfering ions. At pH 3, the maximum static adsorption capacity of Cu(II), Hg(II) and Pb(II) onto the AC-ATSC were 78.20, 67.80 and 48.56 mg g(-1), respectively. The adsorbed metal ions were quantitatively eluted by 3.0 mL of 2% CS(NH2)2 and 2.0 mol L(-1) HCl solution. Common coexisting ions did not interfere with the separation. According to the definition of IUPAC, the detection limits (3sigma) of this method for Cu(II), Hg(II) and Pb(II) were 0.20, 0.12 and 0.45 ng mL(-1), respectively. The relative standard deviation under optimum conditions is less than 4.0% (n=8). The prepared sorbent was applied for the preconcentration of trace Cu(II), Hg(II) and Pb(II) in certified and water samples with satisfactory results.

Identification and Characterization of Novel Immunomodulatory Bursal-derived Pentapeptide-II (BPP-II)*

Science.gov (United States)

Feng, Xiu-Li; Liu, Qing-Tao; Cao, Rui-Bing; Zhou, Bin; Ma, Zhi-Yong; Deng, Wen-Lei; Wei, Jian-Chao; Qiu, Ya-Feng; Wang, Fang-Quan; Gu, Jin-Yan; Wang, Feng-Juan; Zheng, Qi-Sheng; Ishag, Hassan; Chen, Pu-Yan

2012-01-01

The bursa of Fabricius, the acknowledged central humoral immune organ, plays a vital role in B lymphocyte differentiation. However, there are few reports of the molecular basis of the mechanism on immune induction and potential antitumor activity of bursal-derived peptides. In this paper, a novel bursal-derived pentapeptide-II (BPP-II, MTLTG) was isolated and exerted immunomodulatory functions on antibody responses in vitro. Gene microarray analyses demonstrated that BPP-II regulated expression of 2478 genes in a mouse-derived hybridoma cell line. Immune-related gene ontology functional procedures were employed for further functional analysis. Furthermore, the majority of BPP-II-regulated pathways were associated with immune responses and tumor processes. Moreover, BPP-II exhibited immunomodulatory effects on antigen-specific immune responses in vivo, including enhancement of avian influenza virus (H9N2 subtype)-specific antibody and cytokine production and modification of T cell immunophenotypes and lymphocyte proliferation. Finally, BPP-II triggered p53 expression and stabilization and selectively inhibited tumor cell proliferation. These data identified the multifunctional factor, BPP-II, as a novel biomaterial representing an important linking between the humoral central immune system and immune induction, including antitumor. Information generated in this study elucidates further the mechanisms involved in humoral immune system and represents the potential basis of effective immunotherapeutic strategies for treating human tumors and immune improvement. PMID:22184121

Identification and characterization of novel immunomodulatory bursal-derived pentapeptide-II (BPP-II).

Science.gov (United States)

Feng, Xiu-Li; Liu, Qing-Tao; Cao, Rui-Bing; Zhou, Bin; Ma, Zhi-Yong; Deng, Wen-Lei; Wei, Jian-Chao; Qiu, Ya-Feng; Wang, Fang-Quan; Gu, Jin-Yan; Wang, Feng-Juan; Zheng, Qi-Sheng; Ishag, Hassan; Chen, Pu-Yan

2012-02-03

The bursa of Fabricius, the acknowledged central humoral immune organ, plays a vital role in B lymphocyte differentiation. However, there are few reports of the molecular basis of the mechanism on immune induction and potential antitumor activity of bursal-derived peptides. In this paper, a novel bursal-derived pentapeptide-II (BPP-II, MTLTG) was isolated and exerted immunomodulatory functions on antibody responses in vitro. Gene microarray analyses demonstrated that BPP-II regulated expression of 2478 genes in a mouse-derived hybridoma cell line. Immune-related gene ontology functional procedures were employed for further functional analysis. Furthermore, the majority of BPP-II-regulated pathways were associated with immune responses and tumor processes. Moreover, BPP-II exhibited immunomodulatory effects on antigen-specific immune responses in vivo, including enhancement of avian influenza virus (H9N2 subtype)-specific antibody and cytokine production and modification of T cell immunophenotypes and lymphocyte proliferation. Finally, BPP-II triggered p53 expression and stabilization and selectively inhibited tumor cell proliferation. These data identified the multifunctional factor, BPP-II, as a novel biomaterial representing an important linking between the humoral central immune system and immune induction, including antitumor. Information generated in this study elucidates further the mechanisms involved in humoral immune system and represents the potential basis of effective immunotherapeutic strategies for treating human tumors and immune improvement.

Saberes e práticas populares de cuidado em saúde com o uso de plantas medicinais

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Marcio Rossato Badke

2012-01-01

Full Text Available El objetivo fue conocer el origen de los conocimientos y prácticas sobre el uso terapéutico de plantas medicinales por los residentes de la comunidad en la región central de Rio Grande do Sul, Brasil. Se trata de una investigación cualitativa con recolección de datos que se dio a través de entrevistas semi-estructuradas y observación participante. Los encuestados fueron seleccionados a través de la misma red de relaciones. Los datos fueron analizados a través del análisis temático. Se encontró que: aprender el uso y manipulación de las hierbas medicinales tiene su origen en el contexto familiar; se resaltó la influencia de la mujer en la transmisión de los conocimientos, las plantas se encuentran generalmente en el hogar, la mayoría de las plantas utilizadas son respaldadas por el conocimiento científico. Se cree que la investigación tiene relevancia para los enfermeros y la sociedad en su conjunto, que apunta a una conexión necesaria entre el conocimiento popular y científico, así como para inversiones en proyectos que trabajan con este tema.

Removal of Ni(II), Zn(II) and Pb(II) ions from single metal aqueous solution using rice husk-based activated carbon

Energy Technology Data Exchange (ETDEWEB)

Taha, Mohd F., E-mail: faisalt@petronas.com.my; Shaharun, Maizatul S. [Fundamental and Applied Sciences Department, Universiti Teknologi PETRONAS, Bandar Seri Iskandar, 31750, Perak Darul Ridzuan (Malaysia); Shuib, Anis Suhaila, E-mail: anisuha@petronas.com.my; Borhan, Azry [Chemical Engineering Department, Universiti Teknologi PETRONAS, Bandar Seri Iskandar, 31750, Perak Darul Ridzuan (Malaysia)

2014-10-24

An attempt was made to investigate the potential of rice husk-based activated carbon as an alternative low-cost adsorbent for the removal of Ni(II), Zn(II) and Pb(II) ions from single aqueous solution. Rice husk-based activated carbon was prepared via treatment of rice husk with NaOH followed by the carbonization process at 400°C for 2 hours. Three samples, i.e. raw rice husk, rice husk treated with NaOH and rice husk-based activated carbon, were analyzed for their morphological characteristics using field-emission scanning electron microscope/energy dispersive X-ray (FESEM/EDX). These samples were also analyzed for their carbon, hydrogen, nitrogen, oxygen and silica contents using CHN elemental analyzer and FESEM/EDX. The porous properties of rice husk-based activated carbon were determined by Brunauer-Emmett-Teller (BET) surface area analyzer, and its surface area and pore volume were 255 m{sup 2}/g and 0.17 cm{sup 2}/g, respectively. The adsorption studies for the removal of Ni(II), Zn(II) and Pb(II) ions from single metal aqueous solution were carried out at a fixed initial concentration of metal ion (150 ppm) with variation amount of adsorbent (rice husk-based activated carbon) as a function of varied contact time at room temperature. The concentration of each metal ion was analyzed using atomic absorption spectrophotometer (AAS). The results obtained from adsorption studies indicate the potential of rice husk as an economically promising precursor for the preparation of activated carbon for removal of Ni(II), Zn(II) and Pb(II) ions from single aqueous solution. Isotherm and kinetic model analyses suggested that the experimental data of adsorption studies fitted well with Langmuir, Freundlich and second-order kinetic models.

αII-spectrin and βII-spectrin do not affect TGFβ1-induced myofibroblast differentiation.

Science.gov (United States)

Piersma, Bram; Wouters, Olaf Y; Bank, Ruud A

2018-05-03

Mechanosensing of fibroblasts plays a key role in the development of fibrosis. So far, no effective treatments are available to treat this devastating disorder. Spectrins regulate cell morphology and are potential mechanosensors in a variety of non-erythroid cells, but little is known about the role of spectrins in fibroblasts. We investigate whether αII- and βII-spectrin are required for the phenotypic properties of adult human dermal (myo)fibroblasts. Knockdown of αII- or βII-spectrin in fibroblasts did not affect cell adhesion, cell size and YAP nuclear/cytosolic localization. We further investigated whether αII- and βII-spectrin play a role in the phenotypical switch from fibroblasts to myofibroblasts under the influence of the pro-fibrotic cytokine TGFβ1. Knockdown of spectrins did not affect myofibroblast formation, nor did we observe changes in the organization of αSMA stress fibers. Focal adhesion assembly was unaffected by spectrin deficiency, as was collagen type I mRNA expression and protein deposition. Wound closure was unaffected as well, showing that important functional properties of myofibroblasts are unchanged without αII- or βII-spectrin. In fact, fibroblasts stimulated with TGFβ1 demonstrated significantly lower endogenous mRNA levels of αII- and βII-spectrin. Taken together, despite the diverse roles of spectrins in a variety of other cells, αII- and βII-spectrin do not regulate cell adhesion, cell size and YAP localization in human dermal fibroblasts and are not required for the dermal myofibroblast phenotypical switch.

Receptors for insulin-like growth factor II (IGF-II) in the rat kidney glomerulus

International Nuclear Information System (INIS)

Haskell, J.F.; Pillion, D.J.; Meezan, E.

1986-01-01

Renal glomeruli were isolated by a technique involving renal perfusion with a solution containing magnetic iron oxide particles, followed by homogenization, sieving and isolation over a strong magnet. Isolated glomeruli were treated with 1% Triton X-100 to solubilize plasma membrane components while insoluble basement membrane components were removed by centrifugation. [ 125 I]Insulin-like growth factor-II (IGF-II) binding to this preparation was competitively inhibited by increasing amounts of unlabelled IGF-II, with 50% inhibition of binding observed at an IGF-II concentration of 1 ng/ml. [ 125 I]IGF-II was covalently cross-linked to its receptor with disuccinimidyl suberate in two tissues known to contain IGF-II receptors, the rat chondrosarcoma chondrocyte and the rat kidney tubule, as well as in rat renal glomeruli. In all three cases, a specific high-molecular weight (Mr = 255,000) band could be identified on autoradiograms of dodecyl sulfate polyacrylamide gels. These results indicate that the rat glomerulus contains a high-affinity receptor for IGF-II. This finding is consistent with the hypothesis that IGF-II plays a role in glomerular growth and differentiation

Solid phase selective separation and preconcentration of Cu(II) by Cu(II)-imprinted polymethacrylic microbeads.

Science.gov (United States)

Dakova, Ivanka; Karadjova, Irina; Ivanov, Ivo; Georgieva, Ventsislava; Evtimova, Bisera; Georgiev, George

2007-02-12

Ion-imprinted polymer (IIP) particles are prepared by copolymerization of methacrylic acid as monomer, trimethylolpropane trimethacrylate as crosslinking agent and 2,2'-azo-bis-isobutyronitrile as initiator in the presence of Cu(II), a Cu(II)-4-(2-pyridylazo)resorcinol (Cu(II)-PAR) complex, and PAR only. A batch procedure is used for the determination of the characteristics of the Cu(II) solid phase extraction from the IIP produced. The results obtained show that the Cu(II)-PAR IIP has the greatest adsorption capacity (37.4 micromol g(-1) of dry copolymer) among the IIPs investigated. The optimal pH value for the quantitative preconcentration is 7, and full desorption is achieved by 1 M HNO(3). The selectivity coefficients (S(Cu/Me)) for Me=Ni(II), Co(II) are 45.0 and 38.5, respectively. It is established that Cu(II)-PAR IIPs can be used repeatedly without a considerable adsorption capacity loss. The determination of Cu(II) ions in seawater shows that the interfering matrix does not influence the preconcentration and selectivity values of the Cu(II)-PAR IIPs. The detection and quantification limits are 0.001 micromol L(-1) (3sigma) and 0.003 micromol L(-1) (6sigma), respectively.

Use of APACHE II and SAPS II to predict mortality for hemorrhagic and ischemic stroke patients.

Science.gov (United States)

Moon, Byeong Hoo; Park, Sang Kyu; Jang, Dong Kyu; Jang, Kyoung Sool; Kim, Jong Tae; Han, Yong Min

2015-01-01

We studied the applicability of the Acute Physiology and Chronic Health Evaluation II (APACHE II) and Simplified Acute Physiology Score II (SAPS II) in patients admitted to the intensive care unit (ICU) with acute stroke and compared the results with the Glasgow Coma Scale (GCS) and National Institutes of Health Stroke Scale (NIHSS). We also conducted a comparative study of accuracy for predicting hemorrhagic and ischemic stroke mortality. Between January 2011 and December 2012, ischemic or hemorrhagic stroke patients admitted to the ICU were included in the study. APACHE II and SAPS II-predicted mortalities were compared using a calibration curve, the Hosmer-Lemeshow goodness-of-fit test, and the receiver operating characteristic (ROC) curve, and the results were compared with the GCS and NIHSS. Overall 498 patients were included in this study. The observed mortality was 26.3%, whereas APACHE II and SAPS II-predicted mortalities were 35.12% and 35.34%, respectively. The mean GCS and NIHSS scores were 9.43 and 21.63, respectively. The calibration curve was close to the line of perfect prediction. The ROC curve showed a slightly better prediction of mortality for APACHE II in hemorrhagic stroke patients and SAPS II in ischemic stroke patients. The GCS and NIHSS were inferior in predicting mortality in both patient groups. Although both the APACHE II and SAPS II systems can be used to measure performance in the neurosurgical ICU setting, the accuracy of APACHE II in hemorrhagic stroke patients and SAPS II in ischemic stroke patients was superior. Copyright © 2014 Elsevier Ltd. All rights reserved.

Better prognostic marker in ICU - APACHE II, SOFA or SAP II!

Science.gov (United States)

Naqvi, Iftikhar Haider; Mahmood, Khalid; Ziaullaha, Syed; Kashif, Syed Mohammad; Sharif, Asim

2016-01-01

This study was designed to determine the comparative efficacy of different scoring system in assessing the prognosis of critically ill patients. This was a retrospective study conducted in medical intensive care unit (MICU) and high dependency unit (HDU) Medical Unit III, Civil Hospital, from April 2012 to August 2012. All patients over age 16 years old who have fulfilled the criteria for MICU admission were included. Predictive mortality of APACHE II, SAP II and SOFA were calculated. Calibration and discrimination were used for validity of each scoring model. A total of 96 patients with equal gender distribution were enrolled. The average APACHE II score in non-survivors (27.97+8.53) was higher than survivors (15.82+8.79) with statistically significant p value (discrimination power than SAP II and SOFA.

VELOCITY-RESOLVED [C ii] EMISSION AND [C ii]/FIR MAPPING ALONG ORION WITH HERSCHEL *,**

Science.gov (United States)

Goicoechea, Javier R.; Teyssier, D.; Etxaluze, M.; Goldsmith, P.F.; Ossenkopf, V.; Gerin, M.; Bergin, E.A.; Black, J.H.; Cernicharo, J.; Cuadrado, S.; Encrenaz, P.; Falgarone, E.; Fuente, A.; Hacar, A.; Lis, D.C.; Marcelino, N.; Melnick, G.J.; Müller, H.S.P.; Persson, C.; Pety, J.; Röllig, M.; Schilke, P.; Simon, R.; Snell, R.L.; Stutzki, J.

2015-01-01

We present the first ~7.5′×11.5′ velocity-resolved (~0.2 km s−1) map of the [C ii] 158 μm line toward the Orion molecular cloud 1 (OMC 1) taken with the Herschel/HIFI instrument. In combination with far-infrared (FIR) photometric images and velocity-resolved maps of the H41α hydrogen recombination and CO J=2-1 lines, this data set provides an unprecedented view of the intricate small-scale kinematics of the ionized/PDR/molecular gas interfaces and of the radiative feedback from massive stars. The main contribution to the [C ii] luminosity (~85 %) is from the extended, FUV-illuminated face of the cloud (G0>500, nH>5×103 cm−3) and from dense PDRs (G≳104, nH≳105 cm−3) at the interface between OMC 1 and the H ii region surrounding the Trapezium cluster. Around ~15 % of the [C ii] emission arises from a different gas component without CO counterpart. The [C ii] excitation, PDR gas turbulence, line opacity (from [13C ii]) and role of the geometry of the illuminating stars with respect to the cloud are investigated. We construct maps of the L[C ii]/LFIR and LFIR/MGas ratios and show that L[C ii]/LFIR decreases from the extended cloud component (~10−2–10−3) to the more opaque star-forming cores (~10−3–10−4). The lowest values are reminiscent of the “[C ii] deficit” seen in local ultra-luminous IR galaxies hosting vigorous star formation. Spatial correlation analysis shows that the decreasing L[C ii]/LFIR ratio correlates better with the column density of dust through the molecular cloud than with LFIR/MGas. We conclude that the [C ii] emitting column relative to the total dust column along each line of sight is responsible for the observed L[C ii]/LFIR variations through the cloud. PMID:26568638

VELOCITY-RESOLVED [C ii] EMISSION AND [C ii]/FIR MAPPING ALONG ORION WITH HERSCHEL.

Science.gov (United States)

Goicoechea, Javier R; Teyssier, D; Etxaluze, M; Goldsmith, P F; Ossenkopf, V; Gerin, M; Bergin, E A; Black, J H; Cernicharo, J; Cuadrado, S; Encrenaz, P; Falgarone, E; Fuente, A; Hacar, A; Lis, D C; Marcelino, N; Melnick, G J; Müller, H S P; Persson, C; Pety, J; Röllig, M; Schilke, P; Simon, R; Snell, R L; Stutzki, J

2015-10-10

We present the first ~7.5'×11.5' velocity-resolved (~0.2 km s -1 ) map of the [C ii] 158 μ m line toward the Orion molecular cloud 1 (OMC 1) taken with the Herschel /HIFI instrument. In combination with far-infrared (FIR) photometric images and velocity-resolved maps of the H41 α hydrogen recombination and CO J =2-1 lines, this data set provides an unprecedented view of the intricate small-scale kinematics of the ionized/PDR/molecular gas interfaces and of the radiative feedback from massive stars. The main contribution to the [C ii] luminosity (~85 %) is from the extended, FUV-illuminated face of the cloud ( G 0 >500, n H >5×10 3 cm -3 ) and from dense PDRs ( G ≳10 4 , n H ≳10 5 cm -3 ) at the interface between OMC 1 and the H ii region surrounding the Trapezium cluster. Around ~15 % of the [C ii] emission arises from a different gas component without CO counterpart. The [C ii] excitation, PDR gas turbulence, line opacity (from [ 13 C ii]) and role of the geometry of the illuminating stars with respect to the cloud are investigated. We construct maps of the L [C ii]/ L FIR and L FIR / M Gas ratios and show that L [C ii]/ L FIR decreases from the extended cloud component (~10 -2 -10 -3 ) to the more opaque star-forming cores (~10 -3 -10 -4 ). The lowest values are reminiscent of the "[C ii] deficit" seen in local ultra-luminous IR galaxies hosting vigorous star formation. Spatial correlation analysis shows that the decreasing L [C ii]/ L FIR ratio correlates better with the column density of dust through the molecular cloud than with L FIR / M Gas . We conclude that the [C ii] emitting column relative to the total dust column along each line of sight is responsible for the observed L [C ii]/ L FIR variations through the cloud.

Sequestration of chelated copper by structural Fe(II): Reductive decomplexation and transformation of Cu{sup II}-EDTA

Energy Technology Data Exchange (ETDEWEB)

He, Hongping [State Key Laboratory of Pollution Control and Resources Reuse, School of Environmental Science & Engineering, Tongji University, Shanghai 200092 (China); Wu, Deli, E-mail: wudeli@tongji.edu.cn [State Key Laboratory of Pollution Control and Resources Reuse, School of Environmental Science & Engineering, Tongji University, Shanghai 200092 (China); Zhao, Linghui [State Key Laboratory of Pollution Control and Resources Reuse, School of Environmental Science & Engineering, Tongji University, Shanghai 200092 (China); Luo, Cong [School of Civil and Environmental Engineering, Georgia Institute of Technology, GA 30332 (United States); Dai, Chaomeng; Zhang, Yalei [State Key Laboratory of Pollution Control and Resources Reuse, School of Environmental Science & Engineering, Tongji University, Shanghai 200092 (China)

2016-05-15

Highlights: • Structural Fe(II) was found to reveal high sequestration potential in various chelated copper. • Chelated copper was reduced to Cu(0) and Cu{sub 2}O by =Fe(II), whcih was oxidized to Fe{sub 2}O{sub 3}·H{sub 2}O. • Both electron transfer and surface =Fe(II) were found to be crucial during chelated copper reduction. • The indispensible role of reductive decomplexation was identified in chelated copper sequestration. - Abstract: Chelated coppers, such as Cu{sup II}-EDTA, are characteristically refractory and difficult to break down because of their high stability and solubility. Cu{sup II}–EDTA sequestration by structural Fe(II) (=Fe(II)) was investigated intensively in this study. Up to 101.21 mgCu(II)/gFe(II) was obtained by =Fe(II) in chelated copper sequestration under near neutral pH condition (pH 7.70). The mechanism of Cu{sup II}-EDTA sequestration by =Fe(II) was concluded as follows: 3Cu{sup II}–EDTA + 7=Fe(II) + 9H{sub 2}O → Cu(0) ↓ + Cu{sub 2}O ↓ (the major product) + 2Fe{sub 2}O{sub 3}·H{sub 2}O ↓ + 3Fe{sup II}–EDTA +14H{sup +} Novel results strongly indicate that Cu{sup II} reductive transformation induced by surface =Fe(II) was mainly responsible for chelated copper sequestration. Cu(0) generation was initially facilitated, and subsequent reduction of Cu(II) into Cu(I) was closely combined with the gradual increase of ORP (Oxidation-Reduction Potential). Cu-containing products were inherently stable, but Cu{sub 2}O would be reoxidized to Cu(II) with extra-aeration, resulting in the release of copper, which was beneficial to Cu reclamation. Concentration diminution of Cu{sup II}–EDTA within the electric double layer and competitive adsorption were responsible for the negative effects of Ca{sup 2+}, Mg{sup 2+}. By generating vivianite, PO{sub 4}{sup 3−} was found to decrease surface =Fe(II) content. This study is among the first ones to identify the indispensible role of reductive decomplexation in chelated copper

RTNS-II operations guidebook

International Nuclear Information System (INIS)

Heikkinen, D.W.

1985-01-01

This guidebook is intended to provide training criteria, procedures and guidelines for operation of the RTNS-II neutron sources and ancilliary equipment. Use of this document requires full knowledge of the RTNS-II Facility Safety Procedure (FSP) and any Operational Safety Procedures (OSP) in effect. The RTNS-II FSP defines the hazards which may be encountered at RTNS-II and defines the procedures which must be followed in performing any task including operations. The purpose of this document is to provide a central source of detailed information concerning systems and equipment used in operating the RTNS-II neutron sources on a day-to-day basis. All members of the Operations Group are expected to be familiar with its contents. It is also intended to be used in training new members of the Operations Group

Journal of Genetics | Indian Academy of Sciences

Indian Academy of Sciences (India)

Home; Journals; Journal of Genetics; Volume 92; Issue 2. Molecular markers unravel intraspecific and interspecific genetic variability in Plantago ovata and some of its wild allies. Shivanjali Kotwal Manoj K. Dhar Balbir Kour Kuldeep Raj Sanjana Kaul. Research Note Volume 92 Issue 2 August 2013 pp 293-298 ...

Aceites esenciales: mitos y realidades

OpenAIRE

García García, Pablo

2014-01-01

Los aceites esenciales son mezclas complejas de compuestos volátiles extraídos de plantas olorosas. Estos compuestos son utilizados por las plantas para su desarrollo, reproducción o protección. Los aceites esenciales han sido utilizados desde la antigüedad con fines bactericidas, antiparasitarios, insecticidas, medicinales y cosméticos y en la actualidad se usan en la industria farmacéutica, cosmética, agrícola y alimentaria.

Reino Fungi: morfologías y estructuras de los hongos

OpenAIRE

Kuhar, José Francisco; Castiglia, Valeria Carolina; Papinutti, Victor Leandro

2016-01-01

Fil: Kuhar, José Francisco. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Departamento de Biodiversidad y Biología Experimental. Laboratorio de Micologia Experimental; Argentina Fil: Castiglia, Valeria Carolina. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Plantas Tóxicas y Medicinales, Metabolismo de Compuestos Sintéticos y Naturales - Hongos Que Intervienen En la Degradación Biológica; Ar...

Cobalt(III), nickel(II) and ruthenium(II) complexes of 1,10 ...

Indian Academy of Sciences (India)

Co(II) and Ru(II) complexes investigated in this study effect photocleavage of the supercoiled ... DNA is related to their utility in the design and development of synthetic restriction ..... ∗Quasi-reversible/irreversible (electrochemical behaviour of ...

Cobalt(II), nickel(II), copper(II), zinc(II) and hafnium(IV) complexes of N'-(furan-3-ylmethylene)-2-(4-methoxyphenylamino)acetohydrazide.

Science.gov (United States)

Emam, Sanaa M; El-Saied, Fathy A; Abou El-Enein, Saeyda A; El-Shater, Heba A

2009-03-01

Cobalt(II), nickel(II), copper(II), zinc(II) and hafnium(IV) complexes of furan-2-carbaldehyde 4-methoxy-N-anilinoacetohydrazone were synthesized and characterized by elemental and thermal (TG and DTA) analyses, IR, UV-vis and (1)H NMR spectra as well as magnetic moment and molar conductivity. Mononuclear complexes are obtained with 1:1 molar ratio except complexes 3 and 9 which are obtained with 1:2 molar ratios. The IR spectra of ligand and metal complexes reveal various modes of chelation. The ligand behaves as a neutral bidentate one and coordination occurs via the carbonyl oxygen atom and azomethine nitrogen atom. The ligand behaves also as a monobasic tridentate one and coordination occurs through the enolic oxygen atom, azomethine nitrogen atom and the oxygen atom of furan ring. Moreover, the ligand behaves as a neutral tridentate and coordination occurs via the carbonyl oxygen, azomethine nitrogen and furan oxygen atoms as well as a monobasic bidentate and coordination occurs via the enolic oxygen atom and azomethine nitrogen atom. The electronic spectra and magnetic moment measurements reveal that all complexes possess octahedral geometry except the copper complex 10 possesses a square planar geometry. The thermal studies showed the type of water molecules involved in metal complexes as well as the thermal decomposition of some metal complexes.

Thiol-functionalized polysilsesquioxane as efficient adsorbent for adsorption of Hg(II) and Mn(II) from aqueous solution

International Nuclear Information System (INIS)

Niu, Yuzhong; Qu, Rongjun; Liu, Xiguang; Mu, Lei; Bu, Baihui; Sun, Yuting; Chen, Hou; Meng, Yangfeng; Meng, Lina; Cheng, Lin

2014-01-01

Highlights: • PMPSQ was promising adsorbent for the removal of Hg(II) and Mn(II). • The adsorption kinetics followed the pseudo-second-order model. • The adsorption isotherms can be described by the monolayer Langmuir model. • The adsorption was controlled by film diffusion and chemical ion-exchange mechanism. - Abstract: Thiol-functionalized polysilsesquioxane was synthesized and used for the adsorption of Hg(II) and Mn(II) from aqueous solution. Results showed that the optimal pH was about 6 and 5 for Hg(II) and Mn(II), respectively. Adsorption kinetics showed that the adsorption equilibriums were established within 100 min and followed pseudo-second-order model. Adsorption isotherms revealed that the adsorption capacities increased with the increasing of temperature. The adsorption was found to be well described by the monolayer Langmuir isotherm model and took place by chemical ion-exchange mechanism. The thermodynamic properties indicated the adsorption processes were spontaneous and endothermic nature. Selectively adsorption showed that PMPSQ can selectively adsorb Hg(II) from binary ion systems in the presence of the coexistent ions Mn(II), Cu(II), Pb(II), Co(II), and Ni(II). Based on the results, it is concluded that PMPSQ had comparable high adsorption efficiency and could be potentially used for the removal of Hg(II) and Mn(II) from aqueous solution

cobalt(II), nickel(II)

Indian Academy of Sciences (India)

Unknown

procedures. The supporting electrolyte, NaClO4 used in the voltammetric experiment was purchased from. Sigma. IR spectra were recorded in KBr medium on .... (13⋅6). L = Schiff base ligand form of one broad band envelope. The electronic spectra of Co(II) complex showed two spin-allowed transitions at 17856 and ...

Luminescence properties of copper(I), zinc(II) and cadmium(II) coordination compounds with picoline ligands

Energy Technology Data Exchange (ETDEWEB)

Małecki, Jan Grzegorz, E-mail: gmalecki@us.edu.pl; Maroń, Anna

2017-06-15

Mononuclear coordination compounds of copper(I) – [Cu(PPh{sub 3}){sub 2}(picoline)(NO{sub 3})], zinc(II) – [ZnCl{sub 2}(picoline){sub 2}] (picoline=3– and 4–methylpyridine) and polymeric cadmium(II) – [CdCl{sub 2}(β-picoline){sub 2}]{sub n} were prepared and their luminescence properties in solid state and acetonitrile solutions were determined. Single crystal X-ray crystallography revealed distorted tetrahedral geometry around the central ions of the compounds. The compounds exhibit green photoluminescence in solid state and in acetonitrile solutions. The emission of copper(I) compounds originated from metal-to-ligand charge transfer state combined with nitrato-to-picoline charge transfer state i.e. ({sup 1}(M+X)LCT). The presence of nitrato ligand in the coordination sphere of copper(I) compounds quenches the emission. Luminescence of zinc(II) and cadmium(II) compounds results from chloride-to-picoline charge transfer state and the quantum efficiency in the case of the polymeric Cd(II) compound reaches 39%. The photoluminescence quantum yields of the mononuclear zinc(II) compounds vary from 10 to 16% depending on the conditions (solid state, solution). - Graphical abstract: Coordination compounds of copper(I), zinc(II) and polymeric cadmium(II) with picoline ligands were prepared and their luminescence properties in solid state and acetonitrile solutions were determined. The compounds exhibit green photoluminescence in solid state and in acetonitrile solutions. Emission of copper(I) compounds originated from {sup 1}(M+X)LCT state. Luminescence of zinc(II) and cadmium(II) compounds results from chloride-to-picoline charge transfer state and the quantum efficiency in the case of the polymeric Cd(II) compound reaches 39%. The photoluminescence quantum yields of the mononuclear zinc(II) compounds vary from 10 to 16% depending on the conditions (solid state, solution).

BES-II fast data reconstruction

International Nuclear Information System (INIS)

Rong Gang; Zhang Jiawen; Guo Yiqing; Zhang Shaoqiang; Zhao Dixin

2002-01-01

The BES-II fast data reconstruction is reported. Based on PC FARM and/or a 'Distributed Clustered Linux PC System', BES-II fast data reconstruction system is set up. With this system the BES-II data can be fully reconstructed in about 20 minutes after data collection. It takes only 12 minutes to fully reconstruct 30000 events, collected with BES-II detector at BEPC Collider, with a P III-800 PC. The detector performance can be examined based on fully reconstructed data in about 20 minutes after data taking in the BES-II experiment

TAF(II)250: a transcription toolbox.

Science.gov (United States)

Wassarman, D A; Sauer, F

2001-08-01

Activation of RNA-polymerase-II-dependent transcription involves conversion of signals provided by gene-specific activator proteins into the synthesis of messenger RNA. This conversion requires dynamic structural changes in chromatin and assembly of general transcription factors (GTFs) and RNA polymerase II at core promoter sequence elements surrounding the transcription start site of genes. One hallmark of transcriptional activation is the interaction of DNA-bound activators with coactivators such as the TATA-box binding protein (TBP)-associated factors (TAF(II)s) within the GTF TFIID. TAF(II)250 possesses a variety of activities that are likely to contribute to the initial steps of RNA polymerase II transcription. TAF(II)250 is a scaffold for assembly of other TAF(II)s and TBP into TFIID, TAF(II)250 binds activators to recruit TFIID to particular promoters, TAF(II)250 regulates binding of TBP to DNA, TAF(II)250 binds core promoter initiator elements, TAF(II)250 binds acetylated lysine residues in core histones, and TAF(II)250 possesses protein kinase, ubiquitin-activating/conjugating and acetylase activities that modify histones and GTFs. We speculate that these activities achieve two goals--(1) they aid in positioning and stabilizing TFIID at particular promoters, and (2) they alter chromatin structure at the promoter to allow assembly of GTFs--and we propose a model for how TAF(II)250 converts activation signals into active transcription.

Synthesis of Pb(II Imprinted Carboxymethyl Chitosan and the Application as Sorbent for Pb(II Ion

Directory of Open Access Journals (Sweden)

Abu Masykur

2014-07-01

Full Text Available The aims of this research is to synthesize Pb(II imprinted polymers with carboxymethyl chitosan (CMC as polymers and bisphenol A diglycidyl ether (BADGE as cross-linker (Pb-IIP. Chitosan (CTS, non imprinted polymer (NIP and Pb-IIP were characterized using infrared (IR spectroscopy, X-ray diffraction (XRD, surface area analyzer (SAA, scanning electron microscopy (SEM, and energy dispersive X-ray (EDX spectroscopy. The result showed that the adsorption was optimum at pH 5 and contact time of 250 min. Adsorption of Pb(II ion with all of adsorbents followed pseudo-second order kinetic equation. Adsorption of Pb(II ion on CTS followed Freundlich isotherm while that on NIP and Pb-IIP followed the Langmuir adsorption isotherm. The adsorbent of Pb-IIP give higher capacity than the NIP and CTS. Adsorption capacity of Pb-IIP, NIP and CTS were 167.1, 128.9 and 76.1 mg/g, respectively. NIP gave higher adsorption selectivity for Pb(II/Ni(II and Pb(II/Cu(II, whereas Pb-IIP showed higher adsorption selectivity for Pb(II/Cd(II.The hydrogen bonding dominated interaction between Pb(II ion on NIP and Pb-IIP.

Synthesis, NMR characterization, X-ray crystal structure of Co(II) Ni(II) and Cu(II) complexes of a pyridine containing self-assembling

International Nuclear Information System (INIS)

Ranjbar, M.; Taghavipour, M.; Moghimi, A.; Aghabozorg, H.

2002-01-01

In the recent years, the self-assembling systems have been attracted chemists. The intermolecular bond in such systems mainly consists of ion pairing and hydrogen bonding [1,2]. The reaction between self-assembling system liquid LH 2 (py dc=2,6-pyridinedicarboxylic acid and py da=2,6- pyridine diamin) with cobalt (II) nitrate, nickel (II) chloride, and copper (II) acetate in water leads to the formation of self- assemble coordination complexes, [py da.H] 2 [M(py dc) 2 ]. H 2 O, M=Co(II),Ni(II), and Cu(II). The characterization was performed using elemental analysis, ESI mass spectroscopy, 1 H and 13 C NMR and X-ray crystallography. The crystal systems are monoclinic with space group P2 1 /n and four molecules per unit cell. These complexes shows 13 C NMR resonances of cationic counter ion [(py dc,H)] + in DMSO- d 6 but no signal corresponding to the two coordinated ligands [py dc] 2- The metal atoms are six-coordinated with a distorted octahedral geometry. The two [py de] 2- units are almost perpendicular to each other

New instruments at IPNS: POSY II and SAD II

International Nuclear Information System (INIS)

Crawford, R.K.; Felcher, G.P.; Kleb, R.; Epperson, J.E.; Thiyagarajan, P.

1988-01-01

Three new instruments are currently in varying degrees of development/construction at IPNS. One of these, the Glass, Liquid, and Amorphous Materials Diffractometer (GLAD) is the subject of a separate paper in these Proceedings, and so will not be discussed further here. The other two, a second neutron reflectometer (POSY II) and a second small-angle diffractometer (SAD II) are described briefly below. 5 refs., 1 fig., 1 tab

Differential Binding of Co(II) and Zn(II) to Metallo-beta-Lactamase Bla2 from Bacillus anthracis

Energy Technology Data Exchange (ETDEWEB)

Hawk, M.; Breece, R; Hajdin, C; Bender, K; Hu, Z; Costello, A; Bennett, B; Tierney, D; Crowder, M

2009-01-01

In an effort to probe the structure, mechanism, and biochemical properties of metallo-{beta}-lactamase Bla2 from Bacillus anthracis, the enzyme was overexpressed, purified, and characterized. Metal analyses demonstrated that recombinant Bla2 tightly binds 1 equiv of Zn(II). Steady-state kinetic studies showed that mono-Zn(II) Bla2 (1Zn-Bla2) is active, while di-Zn(II) Bla2 (ZnZn-Bla2) was unstable. Catalytically, 1Zn-Bla2 behaves like the related enzymes CcrA and L1. In contrast, di-Co(II) Bla2 (CoCo-Bla2) is substantially more active than the mono-Co(II) analogue. Rapid kinetics and UV-vis, 1H NMR, EPR, and EXAFS spectroscopic studies show that Co(II) binding to Bla2 is distributed, while EXAFS shows that Zn(II) binding is sequential. To our knowledge, this is the first documented example of a Zn enzyme that binds Co(II) and Zn(II) via distinct mechanisms, underscoring the need to demonstrate transferability when extrapolating results on Co(II)-substituted proteins to the native Zn(II)-containing forms.

Ulex europaeus agglutinin II (UEA-II) is a novel, potent inhibitor of complement activation.

Science.gov (United States)

Lekowski, R; Collard, C D; Reenstra, W R; Stahl, G L

2001-02-01

Complement is an important mediator of vascular injury following oxidative stress. We recently demonstrated that complement activation following endothelial oxidative stress is mediated by mannose-binding lectin (MBL) and activation of the lectin complement pathway. Here, we investigated whether nine plant lectins which have a binding profile similar to that of MBL competitively inhibit MBL deposition and subsequent complement activation following human umbilical vein endothelial cell (HUVEC) oxidative stress. HUVEC oxidative stress (1% O(2), 24 hr) significantly increased Ulex europaeus agglutinin II (UEA-II) binding by 72 +/- 9% compared to normoxic cells. UEA-II inhibited MBL binding to HUVEC in a concentration-dependent manner following oxidative stress. Further, MBL inhibited UEA-II binding to HUVEC in a concentration-dependent manner following oxidative stress, suggesting a common ligand. UEA-II (< or = 100 micromol/L) did not attenuate the hemolytic activity, nor did it inhibit C3a des Arg formation from alternative or classical complement pathway-specific hemolytic assays. C3 deposition (measured by ELISA) following HUVEC oxidative stress was inhibited by UEA-II in a concentration-dependent manner (IC(50) = 10 pmol/L). UEA-II inhibited C3 and MBL co-localization (confocal microscopy) in a concentration-dependent manner on HUVEC following oxidative stress (IC(50) approximately 1 pmol/L). Finally, UEA-II significantly inhibited complement-dependent neutrophil chemotaxis, but failed to inhibit fMLP-mediated chemotaxis, following endothelial oxidative stress. These data demonstrate that UEA-II is a novel, potent inhibitor of human MBL deposition and complement activation following human endothelial oxidative stress.

A Comparative Study on the Sorption Characteristics of Pb(II and Hg(II onto Activated Carbon

Directory of Open Access Journals (Sweden)

N. Muthulakshmi Andal

2010-01-01

Full Text Available Biosorption equilibrium and kinetics of Pb(II and Hg(II on coconut shell carbon (CSC were investigated by batch equilibration method. The effects of pH, adsorbent dosage, contact time, temperature and initial concentration of Pb(II and Hg(II on the activated carbon of coconut shell wastes were studied. Maximum adsorption of Pb(II occurred at pH 4.5 and Hg(II at pH 6. The sorptive mechanism followed the pseudo second order kinetics. The equilibrium data were analysed by Langmuir, Freundlich and Dubinin-Radushkevich isotherm models. The equilibration data fitted well with both Langmuir and Freundlich isotherm model. The Langmuir adsorption capacity for Pb(II was greater than Hg(II. The mean free energy of adsorption calculated from Dubinin-Radushkevich (D-R isotherm model indicated that the adsorption of metal ions was found to be by chemical ion exchange. Thermodynamic parameter showed that the sorption process of Pb(II onto SDC was feasible, spontaneous and endothermic under studied conditions. A comparison was evaluated for the two metals.

Transport with Astra in TJ-II; Transporte con Astra en TJ-II

Energy Technology Data Exchange (ETDEWEB)

Lopez-Bruna, D; Castejon, F; Fontdecaba, J M

2004-07-01

This report describes the adaptation of the numerical transport shell ASTRA for performing plasma calculations in the TJ-II stellarator device. Firstly, an approximation to the TJ-II geometry is made and a simple transport model is shared with two other codes in order to compare these codes (PROCTR, PRETOR-Stellarator) with ASTRA as calculation tool for TJ-II plasmas are provided: interpretative and predictive transport. The first consists in estimating the transport coefficients from real experimental data, thes being taken from three TJ-II discharges. The predictive facet is illustrated using a model that is able to includes self-consistently thedynamics of transport barriers. The report includes this model, written in the ASTRA programming language, to illustrate the use of ASTRA. (Author) 26 refs.

Patient-related barriers to pain management: the Barriers Questionnaire II (BQ-II).

Science.gov (United States)

Gunnarsdottir, Sigridur; Donovan, Heidi S; Serlin, Ronald C; Voge, Catherine; Ward, Sandra

2002-10-01

Patients' beliefs can act as barriers to optimal management of cancer pain. The Barriers Questionnaire (BQ) is a tool used to evaluate such barriers. Here, the BQ has been revised to reflect changes in pain management practices, resulting in the Barriers Questionnaire-II (BQ-II), a 27-item, self report instrument. This paper presents the results from two studies where the psychometric properties of the BQ-II were evaluated. In the first study, the responses of 27 nurses trained in pain management were compared to responses of a convenience sample of 12 patients with cancer. The results indicated that patients with cancer had higher mean scores on the BQ-II than did nurses trained in pain management. In the second study, a convenience sample of 172 patients with cancer responded to the BQ-II and a set of pain and quality of life (QOL) measures. A factor analysis supported four factors. Factor one, physiological effects, consists of 12 items addressing the beliefs that side effects of analgesics are inevitable and unmanageable, concerns about tolerance, and concerns about not being able to monitor changes in one's body when taking strong pain medications. Factor two, Fatalism, consists of three items addressing fatalistic beliefs about cancer pain and its management. Factor three, Communication, consists of six items addressing the concern that reports of pain distract the physician from treating the underlying disease, and the belief that 'good' patients do not complain of pain. The fourth and final factor, harmful effects, consists of six items addressing fear of becoming addicted to pain medication and the belief that pain medications harm the immune system. The BQ-II total had an internal consistency of 0.89, and alpha for the subscales ranged from 0.75 to 0.85. Mean (SD) scores on the total scale was 1.52 (0.73). BQ-II scores were related to measures of pain intensity and duration, mood, and QOL. Patients who used adequate analgesics for their levels of pain had

Standardization of radioimmunoassay for dosage of angiotensin II (ang-II) and its methodological evaluation

International Nuclear Information System (INIS)

Mantovani, Milene; Mecawi, Andre S.; Elias, Lucila L.K.; Antunes-Rodrigues, Jose

2011-01-01

This paper standardizes the radioimmunoassay (RIA) for dosage of ANG-II of rats, after experimental conditions of saline hypertonic (2%), treating with losartan (antagonist of ANG-II), hydric privation, and acute hemorrhage (25%). After that, the plasmatic ANG-II was extracted for dosage of RIA, whose sensitiveness was of 1.95 pg/m L, with detection of 1.95 to 1000 pg/m L. The treatment with saline reduced the concentration of ANG-II, while the administration pf losartan, the hydric administration and the hemorrhage increase the values, related to the control group. Those results indicate variations in the plasmatic concentration of ANG-II according to the experimental protocols, validating the method for evaluation of activity renin-angiotensin

Lead (II) and nickel (II) adsorption kinetics from aqueous metal ...

African Journals Online (AJOL)

This paper discusses the kinetics of lead (II) and Nickel (II) ions adsorption from aqueous solutions using chemically modified and unmodified agricultural adsorbents at 28°C, pH 6.2 and 0.01M NaCl ionic strength. The removal of the two metals were found to increase with increase in chemical modification, the sequence ...

Algebra II workbook for dummies

CERN Document Server

Sterling, Mary Jane

2014-01-01

To succeed in Algebra II, start practicing now Algebra II builds on your Algebra I skills to prepare you for trigonometry, calculus, and a of myriad STEM topics. Working through practice problems helps students better ingest and retain lesson content, creating a solid foundation to build on for future success. Algebra II Workbook For Dummies, 2nd Edition helps you learn Algebra II by doing Algebra II. Author and math professor Mary Jane Sterling walks you through the entire course, showing you how to approach and solve the problems you encounter in class. You'll begin by refreshing your Algebr

Structural characterization and antioxidant properties of Cu(II) and Ni(II) complexes derived from dicyandiamide

Science.gov (United States)

Kertmen, Seda Nur; Gonul, Ilyas; Kose, Muhammet

2018-01-01

New Cu(II) and Ni(II) complexes derived from dicyandiamide were synthesized and characterised by spectroscopic and analytical methods. Molecular structures of the complexes were determined by single crystal X-ray diffraction studies. In the complexes, the Cu(II) or Ni(II) ions are four-coordinate with a slight distorted square planar geometry. The ligands (L-nPen and L-iPen) derived from dicyandiamide formed via nucleophilic addition of alcohol solvent molecule in the presence Cu(II) or Ni(II) ions. Complexes were stabilised by intricate array of hydrogen bonding interactions. Antioxidant activity of the complexes was evaluated by DPPH radical scavenging and CUPRAC methods. The complexes exhibit antioxidant activity, however, their activities were much lower than standard antioxidants (Vitamin C and trolox).

Septoglomus fuscum and S. furcatum, two new species of arbuscular mycorrhizal fungi (Glomeromycota)

DEFF Research Database (Denmark)

Blaszkowski, Janusz; Chwat, Gerad; Kovacs, Gábor M

2013-01-01

’s reagent. In the field, S. fuscum was associated with roots of Arctotheca populifolia colonizing maritime dunes located near Strand in South Africa and S. furcatum was associated with Cordia oncocalyx growing in a dry forest in the Ceará State, Brazil. In single-species cultures with Plantago lanceolata...

Polymerization of Methyl Methacrylate Catalyzed by Co(II), Cu(II), and Zn(II) Complexes Bearing N-Methyl-N-((pyridin-2-yl)methyl) cyclohexanamine

Energy Technology Data Exchange (ETDEWEB)

Ahn, Seoung Hyun; Lee, Hyosun [Kyungpook National University, Daegu (Korea, Republic of); Shin, Jongwon [POSTECH, Pohang (Korea, Republic of); Nayab, Saira [Shaheed Benazir Bhutto University, Sheringal (Pakistan)

2016-05-15

We demonstrated the synthesis and characterization of Co(II), Cu(II), and Zn(II) complexes ligated to N-methyl-N-((pyridin-2-yl)methyl)cyclohexanamine. The complex [Co(nmpc)Cl{sub 2}] in the presence of MMAO showed the highest catalytic activity for MMA polymerization at 60 °C compared with its Zn(II) and Cu(II) analogs. The metal center showed an obvious influence on the catalytic activity, although this appeared to have no effect on the stereo-regularity of the resultant PMMA. X-ray diffraction analysis revealed that [Co(nmpc)Cl{sub 2}] and [Zn(nmpc)Cl{sub 2}] crystallized in the monoclinic system with space group P2{sub 1}/c and existed as monomeric and solvent-free complexes.

Spectroscopic, Elemental and Thermal Analysis, and Positron Annihilation Studies on Ca(II), Sr(II), Ba(II), Pb(II), and Fe(III) Penicillin G Potassium Complexes

Science.gov (United States)

Refat, M. S.; Sharshara, T.

2015-11-01

The [Pb(Pin)2] · 3H2O, [M(Pin)(H2O)2(Cl)] · nH2O (M = SrII, CaII or BaII; n = 0-1), and [Fe(Pin)2(Cl)(H2O)] · H2O penicillin G potassium (Pin) complexes were synthesized and characterized using elemental analyses, molar conductivity, thermal analysis and electronic spectroscopy techniques. The positron annihilation lifetime (PAL) and Doppler broadening (DB) techniques have been employed to probe the defects and structural changes of Pin ligand and its complexes. The PAL and DB line-shape parameters were discussed in terms of the structure, molecular weight, ligand-metal molar ratio, and other properties of the Pin complexes.

Preparation, infrared, raman and nmr spectra of N,N'-diethylthiourea complexes with zinc(II), cadmium(II) and mercury(II) halides

Energy Technology Data Exchange (ETDEWEB)

Marcotrigiano, G [Bari Univ. (Italy). Cattedra di Chimica, Facolta di Medicina-Veterinaria

1976-05-01

Several complexes of N,N'-diethylthiourea (Dietu) with zinc(II), cadmium(II) and mercury(II) halides were prepared and characterized by i.r. (4000-60 cm/sup -1/), raman (400-60 cm/sup -1/), in the solid state and n.m.r. and conductometric methods in solution. The complexes Zn(Dietu)/sub 2/X/sub 2/, Cd(Dietu)/sub 2/X/sub 2/ (X=Cl, Br, I) and Hg(Dietu)/sub 2/X/sub 2/ (X=Br, I) are tetrahedral species in which intramolecular -NH...X interactions have been observed. The 1:1 mercury(II) complexes, Hg(Dietu)X/sub 2/ (X=Cl, Br), appear to have a dimeric tetrahedral halide-bridged structure in the solid state. In all these complexes N,N'-diethylthiourea is sulphur-bonded to the metal.

Probing HeII Reionization at z>3.5 with Resolved HeII Lyman Alpha Forest Spectra

Science.gov (United States)

Worseck, Gabor

2017-08-01

The advent of GALEX and COS have revolutionized our view of HeII reionization, the final major phase transition of the intergalactic medium. COS spectra of the HeII Lyman alpha forest have confirmed with high confidence the high HeII transmission that signifies the completion of HeII reionization at z 2.7. However, the handful of z>3.5 quasars observed to date show a set of HeII transmission 'spikes' and larger regions with non-zero transmission that suggest HeII reionization was well underway by z=4. This is in striking conflict with predictions from state-of-the-art radiative transfer simulations of a HeII reionization driven by bright quasars. Explaining these measurements may require either faint quasars or more exotic sources of hard photons at z>4, with concomitant implications for HI reionization. However, many of the observed spikes are unresolved in G140L spectra and are significantly impacted by Poisson noise. Current data cannot reliably probe the ionization state of helium at z>3.5.We request 41 orbits to obtain science-grade G130M spectra of the two UV-brightest HeII-transmitting QSOs at z>3.5 to confirm and resolve their HeII transmission spikes as an unequivocal test of early HeII reionization. These spectra are complemented by recently obtained data from 8m telescopes: (1) Echelle spectra of the coeval HI Lya forest to map the underlying density field that modulates the HeII absorption, and (2) Our dedicated survey for foreground QSOs that may source the HeII transmission. Our recent HST programs revealed the only two viable targets to resolve the z>3.5 HeII Lyman alpha forest, and to conclusively solve this riddle.

The TFIID components human TAF(II)140 and Drosophila BIP2 (TAF(II)155) are novel metazoan homologues of yeast TAF(II)47 containing a histone fold and a PHD finger.

Science.gov (United States)

Gangloff, Y G; Pointud, J C; Thuault, S; Carré, L; Romier, C; Muratoglu, S; Brand, M; Tora, L; Couderc, J L; Davidson, I

2001-08-01

The RNA polymerase II transcription factor TFIID comprises the TATA binding protein (TBP) and a set of TBP-associated factors (TAF(II)s). TFIID has been extensively characterized for yeast, Drosophila, and humans, demonstrating a high degree of conservation of both the amino acid sequences of the constituent TAF(II)s and overall molecular organization. In recent years, it has been assumed that all the metazoan TAF(II)s have been identified, yet no metazoan homologues of yeast TAF(II)47 (yTAF(II)47) and yTAF(II)65 are known. Both of these yTAF(II)s contain a histone fold domain (HFD) which selectively heterodimerizes with that of yTAF(II)25. We have cloned a novel mouse protein, TAF(II)140, containing an HFD and a plant homeodomain (PHD) finger, which we demonstrated by immunoprecipitation to be a mammalian TFIID component. TAF(II)140 shows extensive sequence similarity to Drosophila BIP2 (dBIP2) (dTAF(II)155), which we also show to be a component of Drosophila TFIID. These proteins are metazoan homologues of yTAF(II)47 as their HFDs selectively heterodimerize with dTAF(II)24 and human TAF(II)30, metazoan homologues of yTAF(II)25. We further show that yTAF(II)65 shares two domains with the Drosophila Prodos protein, a recently described potential dTAF(II). These conserved domains are critical for yTAF(II)65 function in vivo. Our results therefore identify metazoan homologues of yTAF(II)47 and yTAF(II)65.

Synthesis and structural characterisation of iron(II) and copper(II) diphosphates containing flattened metal oxotetrahedra

Energy Technology Data Exchange (ETDEWEB)

Keates, Adam C. [School of Chemistry, University of Southampton, Southampton, Hampshire SO17 1B,. UK (United Kingdom); Wang, Qianlong [Department of Chemistry, University of Bath, Claverton Down, Bath, BA2 7AY (United Kingdom); Weller, Mark T., E-mail: m.t.weller@bath.ac.uk [Department of Chemistry, University of Bath, Claverton Down, Bath, BA2 7AY (United Kingdom)

2014-02-15

Single crystal and bulk polycrystalline forms of K{sub 2}MP{sub 2}O{sub 7} (M=Fe(II), Cu(II)) have been synthesised and their structures determined from single crystal X-ray diffraction data. Both compounds crystallize in the tetragonal system, space group P-42{sub 1}m. Their structures are formed from infinite sheets of linked oxopolyhedra of the stoichiometry [MP{sub 2}O{sub 7}]{sup 2−} with potassium cations situated between the layers. The MO{sub 4} tetrahedra share oxygen atoms with [P{sub 2}O{sub 7}]{sup 4−} diphosphate groups and the potassium ions have KO{sub 8} square prismatic geometry. In both compounds the M(II) centre has an unusual strongly flattened, tetrahedral coordination to oxygen, as a result of the Jahn–Teller (JT) effect for the high spin d{sup 6} Fe(II) and p-orbital mixing or a second order JT effect for d{sup 9} Cu(II) centres in four fold coordination. The uncommon transition metal ion environments found in these materials are reflected in their optical absorption spectra and magnetism data. - Graphical abstract: The structures of the tetragonal polymorphs of K{sub 2}MP{sub 2}O{sub 7}, M=Cu(II), Fe(II), consist of infinite sheets of stoichiometry [MP{sub 2}O{sub 7}]{sup 2−}, formed from linked pyrophosphate groups and MO{sub 4} tetrahedra, separated by potassium ions. In both compounds the unusual tetrahedral coordination of the M(II) centre is strongly flattened as a result of Jahn–Teller (JT) effects for high spin, d{sup 6} Fe(II) and p-orbital mixing and second-order JT effects for d{sup 9} Cu(II). Display Omitted - Highlights: • Tetrahedral copper and iron(II) coordinated by oxygen. • New layered phosphate structure. • Jahn–Teller and d{sup 10} distorted coordinations.

Synthesis and structural characterisation of iron(II) and copper(II) diphosphates containing flattened metal oxotetrahedra

International Nuclear Information System (INIS)

Keates, Adam C.; Wang, Qianlong; Weller, Mark T.

2014-01-01

Single crystal and bulk polycrystalline forms of K 2 MP 2 O 7 (M=Fe(II), Cu(II)) have been synthesised and their structures determined from single crystal X-ray diffraction data. Both compounds crystallize in the tetragonal system, space group P-42 1 m. Their structures are formed from infinite sheets of linked oxopolyhedra of the stoichiometry [MP 2 O 7 ] 2− with potassium cations situated between the layers. The MO 4 tetrahedra share oxygen atoms with [P 2 O 7 ] 4− diphosphate groups and the potassium ions have KO 8 square prismatic geometry. In both compounds the M(II) centre has an unusual strongly flattened, tetrahedral coordination to oxygen, as a result of the Jahn–Teller (JT) effect for the high spin d 6 Fe(II) and p-orbital mixing or a second order JT effect for d 9 Cu(II) centres in four fold coordination. The uncommon transition metal ion environments found in these materials are reflected in their optical absorption spectra and magnetism data. - Graphical abstract: The structures of the tetragonal polymorphs of K 2 MP 2 O 7 , M=Cu(II), Fe(II), consist of infinite sheets of stoichiometry [MP 2 O 7 ] 2− , formed from linked pyrophosphate groups and MO 4 tetrahedra, separated by potassium ions. In both compounds the unusual tetrahedral coordination of the M(II) centre is strongly flattened as a result of Jahn–Teller (JT) effects for high spin, d 6 Fe(II) and p-orbital mixing and second-order JT effects for d 9 Cu(II). Display Omitted - Highlights: • Tetrahedral copper and iron(II) coordinated by oxygen. • New layered phosphate structure. • Jahn–Teller and d 10 distorted coordinations

Quality assurance guidance for TRUPACT-II [Transuranic Package Transporter-II] payload control

International Nuclear Information System (INIS)

1989-10-01

The Transuranic Package Transporter-II (TRUPACT-II) Safety Analysis Report for Packaging (SARP) approved by the Nuclear Regulatory Commission (NRC), discusses authorized methods for payload control in Appendix 1.3.7 and the Quality Assurance (QA) requirements in Section 9.3. Subsection 9.3.2.1 covers maintenance and use of the TRUPACT-II and the specific QA requirements are given in DOE/WIPP 89-012. Subsection 9.3.2.2 covers payload compliance, for which this document was written. 6 refs

TRUPACT-II, a regulatory perspective

International Nuclear Information System (INIS)

Gregory, P.C.; Spooner, O.R.

1995-01-01

The Transuranic Package Transporter II (TRUPACT-II) is a US Nuclear Regulatory Commission (NRC) certified Type B packaging for the shipment of contact-handled transuranic (CH-TRU) material by the US Department of Energy (DOE). The NRC approved the TRUPACT-II design as meeting the requirements of Title 10, Code of Federal Regulations, Part 71 (10 CFR 71) and issued Certificate of Compliance (CofC) Number 9218 to the DOE. There are currently 15 certified TRUPACT-IIs. Additional TRUPACT-IIs will be required to make more than 15,000 shipments of CH-TRU waste to the Waste Isolation Pilot Plant (WIPP) site near Carlsbad, New Mexico. The TRUPACT-II may also be used for the DOE inter-site and intra-site shipments of CH-TRU waste. The Land Withdrawal Act (Public Law 102-579), enacted by the US Congress, October 30, 1992, and an agreement between the DOE and the State of New Mexico, signed August 4, 1987, both stipulate that only NRC approved packaging may be used for shipments of TRU waste to the WIPP. Early in the TRUPACT-II development phase it was decided that the transportation system (tractor, trailer, and TRUPACT-II) should be highway legal on all routes without the need for oversize and/or overweight permits. In large measure, public acceptance of the DOE's efforts to safely transport CH-TRU waste depends on the public's perception that the TRUPACT-II is in compliance with all applicable regulations, standards, and quality assurance requirements. This paper addresses some of the numerous regulations applicable to Type B packaging, and it describes how the TRUPACT-II complies with these regulations

Synchronous determination of mercury (II) and copper (II) based on quantum dots-multilayer film

International Nuclear Information System (INIS)

Ma Qiang; Ha Enna; Yang Fengping; Su Xingguang

2011-01-01

Graphical abstract: We developed a sensitive sensor for synchronous detection of Hg (II) and Cu (II) based on the quenchedand recovered PL intensity of QDs-multilayer films. Solutions containing Hg (II) or Cu (II) were used to quench the fluorescence of the QDs-multilayer films firstly. Then, glutathione (GSH) was used to remove Hg (II) or Cu (II) from the QDs-multilayer films due to stronger affinity of GSH-metal ions than that of QDs metal ions. Thus, the fluorescence of QDs-multilayer films was recovered. Highlights: → QDs-multilayer films were developed for synchronous detection of Hg (II) and Cu (II). → Hg (II) and Cu (II) could quench the photoluminescence of the QDs-multilayer films. → Glutathione was used to remove metal ions and recovery photoluminescence of QDs-multilayer films. - Abstract: A sensitive sensor for mercury (II) and copper (II) synchronous detection was established via the changed photoluminescence of CdTe quantum dots (QDs) multilayer films in this work. QDs were deposited on the quartz slides to form QDs-multilayer films by electrostatic interactions with poly(dimethyldiallyl ammonium chloride) (PDDA). Hg 2+ or Cu 2+ could quench the photoluminescence of the QDs-multilayer films, and glutathione (GSH) was used to remove Hg 2+ or Cu 2+ from QDs-multilayer films due to strong affinity of GSH-metal ions, which resulted in the recovered photoluminescence of QDs-multilayer films. There are good linear relationships between the metal ions concentration and the photoluminescence intensity of QDs in the quenched and recovered process. It was found that the Stern-Volmer constants for Hg 2+ are higher than that for Cu 2+ . Based on different quenching and recovery constant between Hg 2+ and Cu 2+ , the synchronous detection of Hg 2+ and Cu 2+ can be achieved. The linear ranges of this assay were obtained from 0.005 to 0.5 μM for Hg 2+ and from 0.01 to 1 μM for Cu 2+ , respectively. And the artificial water samples were determined by this

The physics design of EBR-II; Physique du reacteur EBR-II; Fizicheskij raschet ehksperimental'nogo reaktora - razmnozhitelya EVR-II; Aspectos fisicos del reactor EBR-II

Energy Technology Data Exchange (ETDEWEB)

Loewenstein, W. B. [Argonne National Laboratory, Argonne, IL (United States)

1962-03-15

The physics design oi EBR-II. Calculations of the static, dynamic and long-term reactivity behaviour of EBR-II are reported together with results and analysis of EBR-II dry critical and ZPR-III mock-up experiments. Particular emphasis is given to reactor-physics design problems which arise after the conceptual design is established and before the reactor is built or placed into operation. Reactor-safety analyses and hazards-evaluation considerations are described with their influence on the reactor design. The manner of utilizing the EBR-II mock-up on ZPR-III data and the EBR-II dry critical data is described. These experiments, their analysis and theoretical predictions are the basis for predetermining the physics behaviour of the reactor system. The limitations inherent in applying the experimental data to the performance of the power-reactor system are explored in some detail. This includes the specification of reactor core size and/or fuel-alloy enrichment, provisions for adequate operating and shut-down reactivity, determination of operative temperature and power coefficients of reactivity, and details of power- and flux-distribution as a function of position within the reactor structure. The overall problem of transferring information from simple idealized analytical or experimental geometry to actual hexagonal reactor geometry is described. Nuclear performance, including breeding, of the actual reactor system is compared with that of the idealized conceptual system. The long-term reactivity and power behaviour of the reactor blanket is described within the framework of the proposed cycling of the fuel and blanket alloy. Safety considerations, including normal and abnormal rates of reactivity-insertion, the implication of postulated reactivity effects based on the physical behaviour of the fuel alloy and reactor structure as well as extrapolation of TREAT experiments to the EBR-II system are analysed. The EBR-II core melt-down problem is reviewed. (author

Ni(II) and Cu(II) binding with a 14-aminoacid sequence of Cap43 protein, TRSRSHTSEGTRSR.

Science.gov (United States)

Zoroddu, M A; Kowalik-Jankowska, T; Kozlowski, H; Salnikow, K; Costa, M

2001-03-01

The tetradecapeptide containing the 10 aminoacid repeated sequence on the C-terminus of the Ni(II)-induced Cap43 protein, was analyzed for Ni(II) and Cu(II) binding. A combined pH-metric and spectroscopic UV-VIS, EPR, CD and NMR study of Ni(II) and Cu(II) binding to the blocked CH3CO-Thr-Arg-Ser-Arg-Ser-His-Thr-Ser-Glu-Gly-Thr-Arg-Ser-Arg-NH2 (Ac-TRSRSHTSEGTRSR-Am) peptide, modeling a part of the C-terminal sequence of the Cap43 protein, revealed the formation of octahedral complexes involving imidazole nitrogen of histidine, at pH 5.5 and pH 7 for Cu(II) and Ni(II), respectively; a major square planar 4N-Ni(II) complex (about 100% at pH 9, log K* = -28.16) involving imidazole nitrogen of histidine and three deprotonated amide nitrogens of the backbone of the peptide was revealed; a 3N-Cu(II) complex (maximum about 70% at pH 7, log K*=-13.91) and a series of 4N-Cu(II) complexes starting at pH 5.5 (maximum about 90% at pH 8.7, log K* = -21.39 for CuH(-3)L), were revealed. This work supports the existence of a metal binding site at the COOH-terminal part of the Cap43 peptide.

Stability constants of salicylate of zinc(II), cobalt(II), uranyl(II) and thorium(IV) by paper electrophoresis

International Nuclear Information System (INIS)

Singh, R.K.P.; Yadava, J.R.; Yadava, P.C.; Yadava, K.L.

1983-01-01

Stability constants of zinc(II), cobalt(II), uranyl(II) and thorium(IV) have been determined by paper electrophoresis. Salicylic acid (0.005 mol dm - 3 ) was added to the background electrolyte: 0.1 mol dm - 3 HClO 4 . The proportions of C 6 H 4 OHCOO - and C 6 H 4 OCOO/sup =/ were varied by changing the pH of the electrolyte. These anions yielded the complexes, ZnC 6 H 4 OHCOO + , CoC 6 H 4 OHCOO + , Th(C 6 H 4 OHCOO) 4 and UO 2 (C 6 H 4 OCOO) 2 /sup =/ whose stability constants are found to be 10/sup 3.1/, 10/sup 3.2/, 10/sup 11.6/ and 10/sup 22.2/, respectively (μ = 0.1, temp. 40 0 C). (author)

Nuclear physics II

International Nuclear Information System (INIS)

Elze, T.

1988-01-01

This script consisting of two parts contains the matter of the courses Nuclear Pyhsics I and II, as they were presented in the winter term 1987/88 and summer term 1988 for students of physics at Frankfurt University. In the present part II the matter of the summer term is summarized. (orig.) [de

Structural and antimicrobial studies of coordination compounds of VO(II, Co(II, Ni(II and Cu(II with some Schiff bases involving 2-amino-4-chlorophenol

Directory of Open Access Journals (Sweden)

A. P. MISHRA

2009-05-01

Full Text Available Complexes of tailor-made ligands with life essential metal ions may be an emerging area to answer the problem of multi-drug resistance (MDR. The coordination complexes of VO(II, Co(II, Ni(II and Cu(II with the Schiff bases derived from 2-hydroxyacetophenone/2-chlorobenzaldehyde with 2-ami¬no-4-chlorophenol were synthesized and characterized by elemental analysis, molar conductance, electronic spectra, FT-IR, ESR, FAB mass, thermal and magnetic susceptibility measurements. The FAB mass and thermal data show degradation of the complexes. The ligand A (2-hydroxyacetophenone-2amino-4-chlorophenol behaved as tridentate and ligand B (2-chlorobenzylidene-2-amino-4-chlorophenol as bidentate, coordinating through O and N donors. The complexes [VO(A(H2O]×xH2O, [M(A(H2On]×xH2O for Co and Ni, [Cu(A(H2O] and [VO(B2]×xH2O, [M(B2(H2On] for Co and Cu and [Ni(B2] exhibited coordination numbers 4, 5 or 6. X-ray powder diffraction data (a = 11.00417 Å, b = 11.706081 Å and c = 54.46780 Å showed that [Cu(CACP2(H2O2], complex 8, crystallized in the orthorhombic system. The in vitro biological screening effects of the investigated compounds were tested against the bacteria Escherichia coli, Staphylococcus aureus and Streptococcus fecalis and the fungi Aspergillus niger, Trichoderma polysporum and Candida albicans by the serial dilution method. A comparative study of the MIC values of the Schiff base and their [M(B2(H2O2] complexes (Co(II, complex 6 and Cu(II, complex 8, indicated that the metal complexes exhibited a higher or lower antimicrobial activity than 2-chlorobenzylidene-2-amino-4-chlorophenol as the free ligand (B.

Biosorption of cadmium (II) and lead (II) from aqueous solutions using mushrooms: A comparative study

Energy Technology Data Exchange (ETDEWEB)

Vimala, R., E-mail: vimararagu@yahoo.co.in [School of Biotechnology, Chemical and Biomedical Engineering, VIT University, Vellore 632014, Tamil Nadu (India); Das, Nilanjana [School of Biotechnology, Chemical and Biomedical Engineering, VIT University, Vellore 632014, Tamil Nadu (India)

2009-08-30

Sorption capacity of oyster mushroom (Pleurotus platypus), button mushroom (Agaricus bisporus) and milky mushroom (Calocybe indica) were evaluated on biosorption of heavy metals, viz. cadmium (II) and lead (II) from aqueous solutions. The optimum sorption conditions were studied for each metal separately. The desired pH of the aqueous solution was found to be 6.0 for the removal of cadmium (II) and 5.0 for removal of lead (II) for all the mushrooms. The percent removal of both the metals was found to increase with the increase in biosorbent dosage and contact time. The fitness of the biosorption data for Langmuir and Freundlich adsorption models was investigated. It was found that biosorption of cadmium (II) and lead (II) ions onto the biomass of the three mushrooms were better suitable to Langmuir than Freundlich adsorption model. P. platypus showed the highest metal uptake potential for cadmium (q{sub max} 34.96 mg/g) whereas A. bisporus exhibited maximum potential for lead (q{sub max} 33.78 mg/g). Milky mushroom showed the lowest metal uptake capacity for both the metals. The present data confirms that mushrooms may be used as efficient biosorbent for the removal of cadmium (II) and lead (II) ions from aqueous solution.

Interesting properties of some iron(II), copper(I) and copper(II ...

Indian Academy of Sciences (India)

Administrator

Tridendate ligands with nitrogen centers, generally well-known as the tripod ligands, have been of considerable interest to inorganic chemists dealing with the preparation of model compounds for hemocyanin, tyrosinase etc. We have found that such ligands when complexed with iron(II) and copper(II) and copper(I) ions ...

In vivo evaluation of Aloysia triphylla britton (lemon verbena) essential oil toxicity and citral anti-Trypanosma cruzi activity.

OpenAIRE

Rojas Armas, Juan; Palacios Agüero, Olga; Ortiz Sánchez, José Manuel; López de la Peña, Leavit

2015-01-01

Introducción: Existe escasa investigación en enfermedades olvidadas. Las plantas medicinales son una potencial fuente de compuestos antimicrobianos. Objetivos: Determinar la toxicidad del aceite esencial de Aloysia triphylla y la actividad del citral contra Trypanosoma cruzi en ratones. Diseño: Estudio experimental preclínico in vivo. Institución: Facultad de Medicina, Universidad Nacional Mayor de San Marcos, Lima, Perú. Material: Ratones albinos. Intervenciones: La toxicidad aguda oral a do...

Medicina tradicional de las mujeres Siona del resguardo de Buenavista en el río Putumayo

Directory of Open Access Journals (Sweden)

Giraldo Tafur Clara

1996-06-01

Full Text Available 52 plants used by Siona women in their life cycle and everyday life are discussed, including the medical uses of each plant, the way they are identified and managed.Se referencian 52 plantas utilizadas por las mujeres Siona del Resguardo de Buenavisla en el ciclo de vida femenino y en la vida cotidiana. Se incluyen los usos medicinales de dicha plantas, cómo las identifican y de qué manera las obtienen.

Assesment of chemical and morphological variation of Spanish Marjoram: Spanish Sage and Spike Lavender

OpenAIRE

Méndez Tovar, Inés Rosa

2015-01-01

El presente estudio se llevó a cabo para apoyar al sector agronómico y superar los problemas actuales del mercado de las plantas aromáticas y medicinales (PAM). El problema principal se debe a que las PAM se han recolectado tradicionalmente de forma silvestre. La recolección silvestre no permite la recogida de material vegetal de alta calidad y produce la deforestación, amenazando las especies recolectadas. Hay que añadir que exi...

Zn(II, Mn(II and Sr(II Behavior in a Natural Carbonate Reservoir System. Part I: Impact of Salinity, Initial pH and Initial Zn(II Concentration in Atmospheric Conditions

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Auffray B.

2016-07-01

Full Text Available The sorption of inorganic elements on carbonate minerals is well known in strictly controlled conditions which limit the impact of other phenomena such as dissolution and/or precipitation. In this study, we evidence the behavior of Zn(II (initially in solution and two trace elements, Mn(II and Sr(II (released by carbonate dissolution in the context of a leakage from a CO2 storage site. The initial pH chosen are either equal to the pH of the water-CO2 equilibrium (~ 2.98 or equal to the pH of the water-CO2-calcite system (~ 4.8 in CO2 storage conditions. From this initial influx of liquid, saturated or not with respect to calcite, the batch experiments evolve freely to their equilibrium, as it would occur in a natural context after a perturbation. The batch experiments are carried out on two natural carbonates (from Lavoux and St-Emilion with PCO2 = 10−3.5 bar, with different initial conditions ([Zn(II]i from 10−4 to 10−6 M, either with pure water or 100 g/L NaCl brine. The equilibrium regarding calcite dissolution is confirmed in all experiments, while the zinc sorption evidenced does not always correspond to the two-step mechanism described in the literature. A preferential sorption of about 10% of the concentration is evidenced for Mn(II in aqueous experiments, while Sr(II is more sorbed in saline conditions. This study also shows that this preferential sorption, depending on the salinity, is independent of the natural carbonate considered. Then, the simulations carried out with PHREEQC show that experiments and simulations match well concerning the equilibrium of dissolution and the sole zinc sorption, with log KZn(II ~ 2 in pure water and close to 4 in high salinity conditions. When the simulations were possible, the log K values for Mn(II and Sr(II were much different from those in the literature obtained by sorption in controlled conditions. It is shown that a new conceptual model regarding multiple Trace Elements (TE sorption is

Perovskite phases in the systems Asup(II)O-Usup(VI)O/sub 3/. 2. On the system A/sub 2/sup(II)Bsup(II)Usup(VI)O/sub 6/, with Asup(II), Bsup(II) = Ba, Sr, Ca

Energy Technology Data Exchange (ETDEWEB)

Griffiths, A J; Kemmler-Sack, S [Tuebingen Univ. (Germany, F.R.). Lehrstuhl fuer Anorganische Chemie 2

1980-07-01

Studies on the system A/sub 2/sup(II)Bsup(II)Usup(VI)O/sub 6/ with Asup(II), Bsup(II) = Ba, Sr, Ca or combinations of these have shown that the alkaline earth ions cannot substitute each other in all proportions. The perovskites were studied by X-ray diffraction and vibrational spectroscopic methods. The lattice vibration region of the far infrared spectra proved to be of particular value in providing information on the occupancy of the A and B sites. Analysis of the spectra shows that, in the majority of cases, contary to the geometrical predictions some of the larger alkaline earth ions occupy the six-coordinated B sites and some smaller ions the A positions. The number of ions that take in this A reversible B site-exchange can amount to 20%, but is normally smaller.

The Bipolar II Depression Questionnaire: A Self-Report Tool for Detecting Bipolar II Depression.

Directory of Open Access Journals (Sweden)

Chi Ming Leung

Full Text Available Bipolar II (BP-II depression is often misdiagnosed as unipolar (UP depression, resulting in suboptimal treatment. Tools for differentiating between these two types of depression are lacking. This study aimed to develop a simple, self-report screening instrument to help distinguish BP-II depression from UP depressive disorder. A prototype BP-II depression questionnaire (BPIIDQ-P was constructed following a literature review, panel discussions and a field trial. Consecutively assessed patients with a diagnosis of depressive disorder or BP with depressive episodes completed the BPIIDQ-P at a psychiatric outpatient clinic in Hong Kong between October and December 2013. Data were analyzed using discriminant analysis and logistic regression. Of the 298 subjects recruited, 65 (21.8% were males and 233 (78.2% females. There were 112 (37.6% subjects with BP depression [BP-I = 42 (14.1%, BP-II = 70 (23.5%] and 182 (62.4% with UP depression. Based on family history, age at onset, postpartum depression, episodic course, attacks of anxiety, hypersomnia, social phobia and agoraphobia, the 8-item BPIIDQ-8 was constructed. The BPIIDQ-8 differentiated subjects with BP-II from those with UP depression with a sensitivity/specificity of 0.75/0.63 for the whole sample and 0.77/0.72 for a female subgroup with a history of childbirth. The BPIIDQ-8 can differentiate BP-II from UP depression at the secondary care level with satisfactory to good reliability and validity. It has good potential as a screening tool for BP-II depression in primary care settings. Recall bias, the relatively small sample size, and the high proportion of females in the BP-II sample limit the generalization of the results.

Mu2e-II Injection from PIP-II

Energy Technology Data Exchange (ETDEWEB)

Neuffer, David [Fermilab

2018-04-26

We discuss injection of 800 MeV proton beam from PIP-II into the production target for Mu2e-II, assuming a targeting and μ production scenario similar to mu2e. The incoming beam trajectory must be modified from the mu2e parameters to match the focusing fields. Adding a vertical deflection at injection enables the injected beam to reach the target. Other differences from the mu2e system must be considered, including changes in the target structure, the radiation shielding and beam dump/absorber. H- beam should be stripped to p+. Other variations are discussed.

Syntheses, spectroscopic and thermal analyses of cyanide bridged heteronuclear polymeric complexes: [M(L)2Ni(CN)4]n (Ldbnd N-methylethylenediamine or N-ethylethylenediamine; Mdbnd Ni(II), Cu(II), Zn(II) or Cd(II))

Science.gov (United States)

Karaağaç, Dursun; Kürkçüoğlu, Güneş Süheyla

2016-02-01

Polymeric tetracyanonickelate(II) complexes of the type [M(L)2Ni(CN)4]n (Ldbnd N-methylethylenediamine (men) or N-ethylethylenediamine (neen); Mdbnd Ni(II), Cu(II), Zn(II) or Cd(II)) have been prepared and characterized by FT-IR, Raman spectroscopy, thermal and elemental analysis techniques. Additionally, FT-IR and Raman spectral analyses of men and neen have experimentally and theoretically investigated in the range of 4000-250 cm-1. The corresponding vibration assignments of men and neen are performed by using B3LYP density functional theory (DFT) method together with 6-31 G(d) basis set. The spectral features of the complexes suggest that the coordination environment of the M(II) ions are surrounded by the two symmetry related men and neen ligands and the two symmetry related N atom of cyanide groups, whereas the Ni(II) atoms are coordinated with a square-planar to four C atoms of the cyanide groups. Polymeric structures of the complexes consist of one dimensional alternative chains of [M(L)2]2+ and [Ni(CN)4]2- moieties. The thermal decompositions in the temperature range 30-700 °C of the complexes were investigated in the static air atmosphere.

Plasma opening switch development for the Particle Beam Fusion Accelerator II (PBFA II)

International Nuclear Information System (INIS)

Stinnett, R.W.; McDaniel, D.H.; Rochau, G.E.

1987-01-01

The authors conducted plasma opening switch (POS) experiments on Sandia National Laboratories' new Particle Beam Fusin Accelerator II (PBFA II) (12 MV, 100 TW, 50 ns), on the Supermite accelerator (2 MV, 2 TW, 50 ns) and on the Naval Research Laboratory's Gamble II accelerator (1.8 MV, 1.6 TW, 70 ns). The POS systems on the PBFA II and Supermite accelerators use a newly developed flashboard plasma source to provide the plasma necessary to conduct the large (> 1 MA) currents produced byu these accelerators. In the Supermite experiments, the plasma opening switch conducted currents up to 1 MA before opening in less than 10 ns into an electron beam load. These experiments achieved significant voltage gain relative to the voltage across a matched load. In experiments on Gamble II, power gains of up to 1.7 were achieved using a POS in a strongly coaxial geometry (r/sub outer//r/sub inner/ = 2) with a large magnetic field at the cathode. The POS system on PBFA II is unique because of its size and voltage. This POS system is designed to conduct over 6 MA before opening. In present experiments it has conducted currents of 4-5 MA for over 50 ns

TBscore II

DEFF Research Database (Denmark)

Rudolf, Frauke; Lemvik, Grethe; Abate, Ebba

2013-01-01

Abstract Background: The TBscore, based on simple signs and symptoms, was introduced to predict unsuccessful outcome in tuberculosis patients on treatment. A recent inter-observer variation study showed profound variation in some variables. Further, some variables depend on a physician assessing...... them, making the score less applicable. The aim of the present study was to simplify the TBscore. Methods: Inter-observer variation assessment and exploratory factor analysis were combined to develop a simplified score, the TBscore II. To validate TBscore II we assessed the association between start...

Beryllium(II), manganese(II) and uranyl(VI)-salicylamide complexes

Energy Technology Data Exchange (ETDEWEB)

Maurya, P L; Agarwala, B V; Dey, A K [Allahabad Univ. (India)

1977-01-01

The preparation, composition, general properties and i.r. absorption spectra of the solid chelates formed by salicylamide with beryllium(II), manganese(II) and uranyl(VI) are described. The complexes have been synthesized by refluxing a mixture of ethanolic solutions of the reactants (metal:ligand :: 1:2) for several hours in the presence of alkali. Attempts to isolate the complexes by the interaction of ethanolic solutions of the metal salts and the ligand in the absence of alkali did not succeed.

Structural analysis of group II chitinase (ChtII) catalysis completes the puzzle of chitin hydrolysis in insects.

Science.gov (United States)

Chen, Wei; Qu, Mingbo; Zhou, Yong; Yang, Qing

2018-02-23

Chitin is a linear homopolymer of N -acetyl-β-d-glucosamines and a major structural component of insect cuticles. Chitin hydrolysis involves glycoside hydrolase family 18 (GH18) chitinases. In insects, chitin hydrolysis is essential for periodic shedding of the old cuticle ecdysis and proceeds via a pathway different from that in the well studied bacterial chitinolytic system. Group II chitinase (ChtII) is a widespread chitinolytic enzyme in insects and contains the greatest number of catalytic domains and chitin-binding domains among chitinases. In Lepidopterans, ChtII and two other chitinases, ChtI and Chi-h, are essential for chitin hydrolysis. Although ChtI and Chi-h have been well studied, the role of ChtII remains elusive. Here, we investigated the structure and enzymology of Of ChtII, a ChtII derived from the insect pest Ostrinia furnacalis We present the crystal structures of two catalytically active domains of Of ChtII, Of ChtII-C1 and Of ChtII-C2, both in unliganded form and complexed with chitooligosaccharide substrates. We found that Of ChtII-C1 and Of ChtII-C2 both possess long, deep substrate-binding clefts with endochitinase activities. Of ChtII exhibited structural characteristics within the substrate-binding cleft similar to those in Of Chi-h and Of ChtI. However, Of ChtII lacked structural elements favoring substrate binding beyond the active sites, including an extra wall structure present in Of Chi-h. Nevertheless, the numerous domains in Of ChtII may compensate for this difference; a truncation containing one catalytic domain and three chitin-binding modules ( Of ChtII-B4C1) displayed activity toward insoluble polymeric substrates that was higher than those of Of Chi-h and Of ChtI. Our observations provide the last piece of the puzzle of chitin hydrolysis in insects. © 2018 by The American Society for Biochemistry and Molecular Biology, Inc.

The Influence of Mg(II and Ca(II Ions on Rutin Autoxidation in Weakly Alkaline Aqueous Solutions

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Živanović Slavoljub C.

2016-09-01

Full Text Available Rutin (quercetin-3-O-rutinoside is one of the most abundant bioflavonoids with various biological and pharmacological activities. Considering the ubiquitous presence of Mg(II and Ca(II ions in biological systems we decided to investigate their influence on the autoxidation of rutin in weakly alkaline aqueous solutions. Changes in UV-Vis spectra recorded during the rutin autoxidation in aqueous solution at pH 8.4 revealed that this process was very slow in the absence of metal ions. The presence of Mg(II and, especially Ca(II ion, increased the transformation rate of rutin. UV-Vis spectra recorded after prolonged autoxidation indicated the formation of humic acidlike products in the presence of Mg(II and Ca(II ions. Four new compounds formed during the initial stage of rutin autoxidation in the presence of Mg(II and Ca(II ions were detected by HPLCDAD. Based on the analysis of their DAD UV-Vis spectra and comparison of their retention times with the retention time value for rutin, we concluded that the initial rutin transformation products were formed by the water addition on double bond in ring C and hydroxylation of ring B. A very small decrease of the initial rutin concentration (4% was observed by HPLC-DAD in the absence of metal ions for the period of 90 minutes. However, rutin concentration decrease was much larger in the presence of Mg(II and Ca(II ions (14% and 24%, respectively. The more pronounced effect of Ca(II ion on the rutin autoxidation may be explained by the stronger binding of Mg(II ion to rutin and thus greater stabilizing effect on reaction intermediates caused by its higher ionic potential (charge/ionic radius ratio in comparison to Ca(II ion. The results of this study may contribute to the better understanding of interactions of Mg(II and Ca(II ions with natural phenolic antioxidants which are important for their various biological activities.

On the ortho-positronium quenching reactions promoted by Fe(II), Fe(III), Co(III), Ni(II), Zn(II) and Cd(II) cyanocomplexes

Science.gov (United States)

Fantola Lazzarini, Anna L.; Lazzarini, Ennio

The o-Ps quenching reactions promoted in aqueous solutions by the following six cyanocomplexes: [Fe(CN) 6] 4-; [Co(CN) 6] 3-; [Zn(CN) 4] 2-; [Cd(CN) 6] 2-; [Fe(CN) 6] 3-; [Ni(CN) 4] 2- were investigated. The first four reactions probably consist in o-Ps addition across the CN bond, their rate constants at room temperature, Tr, being ⩽(0.04±0.02) × 10 9 M -1 s -1, i.e. almost at the limit of experimental errors. The rate constant of the fifth reaction, in o-Ps oxydation, at Tr is (20.3±0.4) × 10 9 M -1 s -1. The [Ni(CN) 4] 2-k value at Tr, is (0.27±0.01) × 10 9 M -1 s -1, i.e. 100 times less than the rate constants of o-Ps oxydation, but 10 times larger than those of the o-Ps addition across the CN bond. The [Ni(CN) 4] 2- reaction probably results in formation of the following positronido complex: [Ni(CN) 4Ps] 2-. However, it is worth noting that the existence of such a complex is only indirectly deduced. In fact it arises from comparison of the [Ni(CN) 4] 2- rate constant with those of the Fe(II), Zn(II), Cd(II), and Co(III) cyanocomplexes, which, like the Ni(II) cyanocomplex, do not promote o-Ps oxydation or spin exchange reactions.

International Literature Review on WHODAS II (World Health Organization Disability Assessment Schedule II

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Federici, Stefano

2009-06-01

Full Text Available This review is a critical analysis regarding the study and utilization of the World Health Organization Disability Assessment Schedule II (WHODAS II as a basis for establishing specific criteria for evaluating relevant international scientific literature.The WHODAS II is an instrument developed by the World Health Organisation in order to assess behavioural limitations and restrictions related to an individual’s participation, independent from a medical diagnosis. This instrument was developed by the WHO’s Assessment, Classification and Epidemiology Group within the framework of the WHO/NIH Joint Project on Assessment and Classification of Disablements. To ascertain the international dissemination level of for WHODAS II’s utilization and, at the same time, analyse the studies regarding the psychometric validation of the WHODAS II translation and adaptation in other languages and geographical contests. Particularly, our goal is to highlight which psychometric features have been investigated, focusing on the factorial structure, the reliability, and the validity of this instrument. International literature was researched through the main data bases of indexed scientific production: the Cambridge Scientific Abstracts – CSA, PubMed, and Google Scholar, from 1990 through to December 2008.The following search terms were used:“whodas”, in the field query, plus “title” and “abstract”.The WHODAS II has been used in 54 studies, of which 51 articles are published in international journals, 2 conference abstracts, and one dissertation abstract. Nevertheless, only 7 articles are published in journals and conference proceedings regarding disability and rehabilitation. Others have been published in medical and psychiatric journals, with the aim of indentifying comorbidity correlations in clinical diagnosis concerning patients with mental illness. Just 8 out of 51 articles have studied the psychometric properties of the WHODAS II. The

Linac Coherent Light Source II (LCLS-II) Conceptual Design Report

International Nuclear Information System (INIS)

Stohr, J.

2011-01-01

The LCLS-II Project is designed to support the DOE Office of Science mission, as described in the 22 April 2010 Mission Need Statement. The scope of the Project was chosen to provide an increase in capabilities and capacity for the facility both at project completion in 2017 and in the subsequent decade. The Project is designed to address all points of the Mission Need Statement (MNS): (1) Expanded spectral reach; (2) Capability to provide x-ray beams with controllable polarization; (3) Capability to provide 'pump' pulses over a vastly extended range of photon energies to a sample, synchronized to LCLS-II x-ray probe pulses with controllable inter-pulse time delay; and (4) Increase of user access through parallel rather than serial x-ray beam use within the constraint of a $300M-$400M Total Project Cost (TPC) range. The LCLS-II Project will construct: (1) A hard x-ray undulator source (2-13 keV); (2) A soft x-ray undulator source (250-2,000 eV); (3) A dedicated, independent electron source for these new undulators, using sectors 10-20 of the SLAC linac; (4) Modifications to existing SLAC facilities for the injector and new shielded enclosures for the undulator sources, beam dumps and x-ray front ends; (5) A new experiment hall capable of accommodating four experiment stations; and (6) Relocation of the two soft x-ray instruments in the existing Near Experiment Hall (NEH) to the new experiment hall (Experiment Hall-II). A key objective of LCLS-II is to maintain near-term international leadership in the study of matter on the fundamental atomic length scale and the associated ultrafast time scales of atomic motion and electronic transformation. Clearly, such studies promise scientific breakthroughs in key areas of societal needs like energy, environment, health and technology, and they are uniquely enabled by forefront X-ray Free Electron Laser (X-FEL) facilities. While the implementation of LCLS-II extends to about 2017, it is important to realize that LCLS-II only

Predictive value of SAPS II and APACHE II scoring systems for patient outcome in a medical intensive care unit

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Amina Godinjak

2016-11-01

Full Text Available Objective. The aim is to determine SAPS II and APACHE II scores in medical intensive care unit (MICU patients, to compare them for prediction of patient outcome, and to compare with actual hospital mortality rates for different subgroups of patients. Methods. One hundred and seventy-four patients were included in this analysis over a oneyear period in the MICU, Clinical Center, University of Sarajevo. The following patient data were obtained: demographics, admission diagnosis, SAPS II, APACHE II scores and final outcome. Results. Out of 174 patients, 70 patients (40.2% died. Mean SAPS II and APACHE II scores in all patients were 48.4±17.0 and 21.6±10.3 respectively, and they were significantly different between survivors and non-survivors. SAPS II >50.5 and APACHE II >27.5 can predict the risk of mortality in these patients. There was no statistically significant difference in the clinical values of SAPS II vs APACHE II (p=0.501. A statistically significant positive correlation was established between the values of SAPS II and APACHE II (r=0.708; p=0.001. Patients with an admission diagnosis of sepsis/septic shock had the highest values of both SAPS II and APACHE II scores, and also the highest hospital mortality rate of 55.1%. Conclusion. Both APACHE II and SAPS II had an excellent ability to discriminate between survivors and non-survivors. There was no significant difference in the clinical values of SAPS II and APACHE II. A positive correlation was established between them. Sepsis/septic shock patients had the highest predicted and observed hospital mortality rate.

Foam separation of Cu (II) and Ni(II) from aqueous solutions and simulated wastewaters

International Nuclear Information System (INIS)

Shakir, K.; Beheir, Sh.G.; Aziz, M.

2003-01-01

Batch experiments on the removal of Cu(II) and Ni(II) from aqueous solutions were performed through two foam separation techniques: precipitate flotation (PTF) an adsorbing colloid flotation (ACF). In ACF, Fe(III), oxyhydroxide was used as co precipitant and/or adsorbing colloid and sodium lauryl sulfate was used as a collector. ACF required a lower collector concentration than PTF. foreign ions were found to decrease the percent removal, the extent of decrease being higher by divalent ions than that by monovalent ones. However, the percent removal could be improved, even in presence of foreign ions, by addition of Al(II) as an activator. High removals could be attained for Cu(II) and Ni(II) from simulated wastewaters containing different concentrations of both metal ions. The addition of concentrations below the limits recommended by the egyptian regulations for environmental discharge

Serum insulin-like growth factor II (IGF-II) and adrenomedullin (ADM) in coronary heart disease

International Nuclear Information System (INIS)

Tong Lijun; Ji Naijun; Fan Bifu; Wang Chengyao; Mei Yibin; Chen Donghai; Li Fuyuan

2005-01-01

Objective: To investigate the changes of serum insulin-like growth factor (IGF-II) and adrenomedullin (ADM) levels in patients with coronary heart disease (CHD). Methods: Serum IGF-II and ADM levels were measured with RIA in 90 CHD patients and 40 controls. Results: Serum IGF-II and ADM levels were significantly higher in CHD patients than those in controls (P 0.05). Serum IGF-II and ADM levels were significantly higher in the patients complicated with myocardial infarction (MI) than those in patients without this complication (t=2.831, t=2.328, both P 0.05). Conclusion: Serum IGF-II and ADM levels were increased in CHD patients, most markedly in those complicated with MI. (authors)

Spiral chain structure of high pressure selenium-II' and sulfur-II from powder x-ray diffraction

International Nuclear Information System (INIS)

Fujihisa, Hiroshi; Yamawaki, Hiroshi; Sakashita, Mami; Yamada, Takahiro; Honda, Kazumasa; Akahama, Yuichi; Kawamura, Haruki; Le Bihan, Tristan

2004-01-01

The structure of high pressure phases, selenium-II ' (Se-II ' ) and sulfur-II (S-II), for α-Se 8 (monoclinic Se-I) and α-S 8 (orthorhombic S-I) was studied by powder x-ray diffraction experiments. Se-II ' and S-II were found to be isostructural and to belong to the tetragonal space group I4 1 /acd, which is made up of 16 atoms in the unit cell. The structure consisted of unique spiral chains with both 4 1 and 4 3 screws. The results confirmed that the structure sequence of the pressure-induced phase transitions for the group VIb elements depended on the initial molecular form. The chemical bonds of the phases are also discussed from the interatomic distances that were obtained

Digital logic circuit design with ALTERA Quartus II

International Nuclear Information System (INIS)

Lee, Seung Ho

2009-09-01

This book consists 31 chapters about digital logic circuit with ALTERA Quartus II. It includes the introduction of ALTERA Quartus II, ALTERA Quartus II schematic editor, ALTERA Quartus II compiler, ALTERA Quartus II simulator, ALTERA Quartus II timing analyzer, how to use HBE-COMBO II training and HBE-COMBO II training kit with schematic editor, VHDL grammar and practice of ALTERA Quartus II and HBE-COMBO II training kit with VHDL.

Dust in H II regions

International Nuclear Information System (INIS)

Isobe, S.

1977-01-01

Several pieces of evidence indicate that H II regions may contain dust: 1) the continuum light scattered by dust grains (O'Dell and Hubbard, 1965), 2) thermal radiation from dust grains at infrared wavelengths (Ney and Allen, 1969), 3) the abnormal helium abundance in some H II regions (Peimbert and Costero, 1969), etc. Although observations of the scattered continuum suggest that the H II region cores may be dust-free, dust grains and gas must be well mixed in view of the infrared observations. This difficulty may be solved by introducing globules with sizes approximately 0.001 pc. These globules and the molecular clouds adjacent to H II regions are the main sources supplying dust to H II regions. (Auth.)

Derivation of electron density and temperature from (S II) and (O II) line intensity ratios

Energy Technology Data Exchange (ETDEWEB)

Canto, J; Meaburn, J; Theokas, A C [Manchester Univ. (UK). Dept of Astronomy; Elliott, K H [Anglo-Australian Observatory, Epping (Australia)

1980-12-01

Line intensity ratios for (S II) and (O II) due to collisional de-excitation are briefly discussed. Comparison is made between various reaction rate parameters presented by separate investigators. Included are observations of ratios obtained from the Orion nebula which experimentally confirm the reaction rates of Pradhan as best representing the observed distribution of these ratios. (O II) and (S II) contour plots are also presented, which allow effective electron temperatures and densities to be estimated from pairs of line ratios.

SPECIATION OF BINARY COMPLEXES OF Pb(II) AND Cd(II) WITH ...

African Journals Online (AJOL)

ABSTRACT. Chemical speciation of L-Asparagine complexes of Pb(II) and Cd(II) in presence of (0-50% v/v) dimethyl sulfoxide(DMSO)-water mixtures has been studied potentiometrically at 303.0 K and at an ionic strength of 0.16 mol L-1. The models containing different number of species were refined by using the ...

Structural properties of MHC class II ligands, implications for the prediction of MHC class II epitopes.

Directory of Open Access Journals (Sweden)

Kasper Winther Jørgensen

2010-12-01

Full Text Available Major Histocompatibility class II (MHC-II molecules sample peptides from the extracellular space allowing the immune system to detect the presence of foreign microbes from this compartment. Prediction of MHC class II ligands is complicated by the open binding cleft of the MHC class II molecule, allowing binding of peptides extending out of the binding groove. Furthermore, only a few HLA-DR alleles have been characterized with a sufficient number of peptides (100-200 peptides per allele to derive accurate description of their binding motif. Little work has been performed characterizing structural properties of MHC class II ligands. Here, we perform one such large-scale analysis. A large set of SYFPEITHI MHC class II ligands covering more than 20 different HLA-DR molecules was analyzed in terms of their secondary structure and surface exposure characteristics in the context of the native structure of the corresponding source protein. We demonstrated that MHC class II ligands are significantly more exposed and have significantly more coil content than other peptides in the same protein with similar predicted binding affinity. We next exploited this observation to derive an improved prediction method for MHC class II ligands by integrating prediction of MHC- peptide binding with prediction of surface exposure and protein secondary structure. This combined prediction method was shown to significantly outperform the state-of-the-art MHC class II peptide binding prediction method when used to identify MHC class II ligands. We also tried to integrate N- and O-glycosylation in our prediction methods but this additional information was found not to improve prediction performance. In summary, these findings strongly suggest that local structural properties influence antigen processing and/or the accessibility of peptides to the MHC class II molecule.

A metal-organic framework nanocomposite made from functionalized magnetite nanoparticles and HKUST-1 (MOF-199) for preconcentration of Cd(II), Pb(II), and Ni(II)

International Nuclear Information System (INIS)

Ghorbani-Kalhor, Ebrahim

2016-01-01

The author describes the preparation of a magnetic metal organic framework of type MOF-199 containing magnetite (Fe 3 O 4 ) nanoparticles carrying covalently immobilized 4-(thiazolylazo) resorcinol (Fe 3 O 4 -TAR). This material is shown to represent a viable sorbent for separation and preconcentration of Cd(II), Pb(II), and Ni(II) ions. Box-Behnken design was applied to optimize the parameters affecting preconcentration. Following elution with 0.6 mol L −1 EDTA, the ions were quantified by FAAS. The capacity of the sorbent ranged between 185 and 210 mg g −1 . The limits of detection are 0.15, 0.40, and 0.8 ng mL −1 for Cd(II), Ni(II), and Pb(II) ions, respectively. The relative standard deviations are <8.5 %. The method was successfully applied to the rapid extraction of trace amounts of these ions from sea food and agri food. (author)

Differential Effect of Solution Conditions on the Conformation of the Actinoporins Sticholysin II and Equinatoxin II

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EDSON V.F. FAUTH

2014-12-01

Full Text Available Actinoporins are a family of pore-forming proteins with hemolytic activity. The structural basis for such activity appears to depend on their correct folding. Such folding encompasses a phosphocholine binding site, a tryptophan-rich region and the activity-related N-terminus segment. Additionally, different solution conditions are known to be able to influence the pore formation by actinoporins, as for Sticholysin II (StnII and Equinatoxin II (EqtxII. In this context, the current work intends to characterize the influence of distinct solution conditions in the conformational behavior of these proteins through molecular dynamics (MD simulations. The obtained data offer structural insights into actinoporins dynamics in solution, characterizing its conformational behavior at the atomic level, in accordance with previous experimental data on StnII and EqtxII hemolytic activities.

The influence of Fe(II) competition on the sorption and migration of Ni(II) in MX-80 bentonite

International Nuclear Information System (INIS)

Pfingsten, Wilfried; Bradbury, Mike; Baeyens, Bart

2011-01-01

Highlights: → We model the diffusion of Ni(II) through bentonite using different sorption models. → We examine sorption competition of Fe(II) and Ni(II) at different concentrations. → Ni(II) breakthrough is 15 times earlier with Fe(II) sorption competition. → Ni(II) sorption is non-linear and depends on the Fe(II) concentration levels. → Sorption competition is important and has to be modelled by reactive transport codes. - Abstract: The results from batch sorption experiments on montmorillonite systems have demonstrated that bivalent transition metals compete with one another for sorption sites. For safety analysis studies of high level radioactive waste repositories with compacted bentonite near fields, the importance of competitive sorption on the migration of radionuclides needs to be evaluated. Under reducing conditions, the bentonite porewater chosen has a Fe(II) concentration of ∼5.3 x 10 -5 M through saturation with siderite. The purpose of this paper is to assess the influence of such high Fe(II) concentrations on the transport of Ni(II) through compacted bentonite, Ni(II) was chosen as an example of a bivalent transition metal. The one-dimensional calculations were carried out at different Ni(II) equilibrium concentrations at the boundary (Ni(II) EQBM ) with the reactive transport code MCOTAC incorporating the two site protolysis non electrostatic surface complexation/cation exchange sorption model, MCOTAC-sorb. At a Ni(II) EQBM level of 10 -7 M without Fe(II) competition, the reactive transport calculations using a constant K d approach and the MCOTAC-sorb calculation yielded the same breakthrough curves. At higher Ni(II) EQBM (10 -5 M), the model calculations with MCOTAC-sorb indicated a breakthrough which was shifted to later times by a factor of ∼5 compared with the use of the constant K d approach. When sorption competition was included in the calculations, the magnitude of the influence depended on the sorption characteristics of the

Current status of experimental breeder reactor-II [EBR-II] shutdown planning

International Nuclear Information System (INIS)

McDermott, M. D.; Griffin, C. D.; Michelbacher, J. A.; Earle, O. K.

2000-01-01

The Experimental Breeder Reactor--II (EBR-II) at Argonne National Laboratory--West (ANL-W) in Idaho, was shutdown in September, 1994 as mandated by the US Department of Energy. This sodium cooled reactor had been in service since 1964, and was to be placed in an industrially and radiologically safe condition for ultimate decommissioning. The deactivation of a liquid metal reactor presents unique concerns. The first major task associated with the project was the removal of all fueled assemblies. In addition, sodium must be drained from systems and processed for ultimate disposal. Residual quantities of sodium remaining in systems must be deactivated or inerted to preclude future hazards associated with pyrophoricity and generation of potentially explosive hydrogen gas. A Sodium Process Facility was designed and constructed to react the elemental sodium from the EBR-II primary and secondary systems to sodium hydroxide for disposal. This facility has a design capacity to allow the reaction of the complete inventory of sodium at ANL-W in less than two years. Additional quantities of sodium from the Fermi-1 reactor are also being treated at the Sodium Process Facility. The sodium environment and the EBR-II configuration, combined with the radiation and contamination associated with thirty years of reactor operation, posed problems specific to liquid metal reactor deactivation. The methods being developed and implemented at EBR-II can be applied to other similar situations in the US and abroad

Gas dynamics of H II regions. II. Two-dimensional axisymmetric calculations

International Nuclear Information System (INIS)

Bodenheimer, P.; Tenorio-Tagle, G.; Yorke, H.W.

1979-01-01

The evolution of H II regions is calculated with a two-dimensional hydrodynamic numerical procedure under the assumption that the exciting star is born within a cool molecular cloud whose density is about 10 3 particles cm -3 . As the ionization of the cloud's edge is completed, a large pressure gradient is set up and ionized cloud material expands into the ionized low-density (1 particle cm -3 ) intercloud medium, with velocities larger than 30 km s -1 .The calculations are made under the simplifying assumptions that (i) within the H II region, ionization equilibrium holds at all times, (ii) the ionization front is a discontinuity, thus its detailed structure is not calculated, (iii) the temperature of each region (H II region, neutral cloud, and intercloud medium) is constant in time, (iv) all ionizing photons come radially from the exciting star. Four cases are calculated and compared with observations: (1) the edge of the cloud is overrun by a supersonic ionization front, (2) the initial Stroemgren sphere surrounding the star lies deep inside the cloud, thus the cloud's edge is ionized by a subsonic ionization front, (3) the ionization front breaks through two opposite faces of the same cloud simultaneously, (4) the flow encounters an isolated globule of density 10 3 particles cm -3 shortly after emerging from the molecular cloud.The phenomena here considered show how evolving H II regions are an important input of kinetic energy to the interstellar medium

ETNOBOTÁNICA MÉDICA DE GRUPOS CRIOLLOS DE ARGENTINA: RECONOCIMIENTO, ANÁLISIS Y PUESTA EN VALOR DE LOS DATOS PRESENTADOS POR EL GOBIERNO ARGENTINO EN LA EXPOSICIÓN UNIVERSAL DE PARÍS DE 1889

Directory of Open Access Journals (Sweden)

Gustavo F. Scarpa

2016-01-01

Full Text Available Se reconoce, pone en valor y analiza un importante volumen de datos sobre etnobotánica médica ar - gentina hallado en un catálogo sobre materiales e informaciones presentados en la Exposición Universal de París de 1889 por el Gobierno Argentino. Mediante la caracterización, descripción detallada y análisis de la información, se identificaron 758 datos de etnobotánica médica correspondientes a 243 taxones, 710 de los cuales fueron validados y actualizados respecto a la nomenclatura científica, distribución de las plantas referidas y propiedades farmacológicas asignadas. Tales datos fueron referidos para 11 provincias argentinas y corresponden a pueblos criollos de cinco complejos bioculturales. El análisis de los datos muestra que estos se agrupan en 20 categorías de usos medicinales, siendo las más destaca - das aquellas relacionadas con el aparato digestivo (19,6 % y, en menor porcentaje, como vulnerarios, aparato respiratorio y reproductor. Se identificaron un total de 146 tipos de aplicaciones medicinales. Se discuten algunos aspectos atinentes a su adscripción biocultural, usos históricos poco comunes y originalidad de su aporte a la etnobotánica de pueblos criollos de Argentina.

terapêutica

Directory of Open Access Journals (Sweden)

Marisa Ines Tomazzoni

2006-01-01

Full Text Available Se trata de un estudio etnobotánico e investigación de opinión, que tuvo como objetivo ampliar el conocimiento sobre el uso de las plantas medicinales en la comunidad de la Municipalidad de Cascavel-PR, con miras a apoyar en la implantación de los fitoterápicos en la red pública de la salud. La muestra correspondió a 50 familias del área de la jurisdicción de una Unidad Básica de Salud, seleccionadas mediante una muestra estratificada proporcional. Para la obtención de los datos se optó por una investigación de carácter exploratório-descriptivo, a través de la entrevista semiestructurada. Como resultado, se observo que el 96% de la población albo manifestó el uso de la plantas; fueron registradas 271 referencias etnobotánicas, englobando 75 etnoespecies; 40 propiedades terapéuticas estaban relacionadas al uso doméstico. El uso de las plantas es bastante difundido y la transferencia eel conocimiento etnobotánico sigue los padrones de las comunidades trradicionales, no existiendo bloqueos en éste proceso. Se constató también, que las plantas medicinales para la comunidad representan un factor importante para la manutención de las condiciones de la salud, formando parte de un saber local preservado.

The Role of Endophytic Microorganisms of Medicinal Plants in the Adaptation of Host Plant

Directory of Open Access Journals (Sweden)

Zhivetev M.A.

2015-09-01

Full Text Available Cultures of microorganisms were isolated from endosphere of Lake Baikal littoral zone plants: Veronica chamaedrys L., Alchemilla subscrenata Buser, Achillea asiatica Serg., Taraxacum officinale Wigg., Plantago major L. Morphology and biochemical properties of isolated bacteria were studied. For the majority of the endophytic bacterial cultures cellulolitic and proteolytic activity has been shown, which necessary for the effective colonization of plant tissue. For many cultures revealed ability in varying degrees to form a biofilm to improve survival in a vegetative organism. Their potencial role in adaptation of plant-hosts under conditions of climat Baikal region was shown. In particular, 9 of cultures demonstrated ability to act as nitrogen retainer. The vast majority of bacterial cultures did not have phytotoxicity or demonstrated its low level, reflecting and minimum negative effects of them on plant. Moreover, culture with encryption P3, isolated from Plantago major in August, showed a stimulatory effect in experiments on phytotoxicity. This same culture possessed the highest ability to secrete sugars as at +26°С and at +4°С.

Linac Coherent Light Source II (LCLS-II) Conceptual Design Report

Energy Technology Data Exchange (ETDEWEB)

Stohr, J

2011-11-16

The LCLS-II Project is designed to support the DOE Office of Science mission, as described in the 22 April 2010 Mission Need Statement. The scope of the Project was chosen to provide an increase in capabilities and capacity for the facility both at project completion in 2017 and in the subsequent decade. The Project is designed to address all points of the Mission Need Statement (MNS): (1) Expanded spectral reach; (2) Capability to provide x-ray beams with controllable polarization; (3) Capability to provide 'pump' pulses over a vastly extended range of photon energies to a sample, synchronized to LCLS-II x-ray probe pulses with controllable inter-pulse time delay; and (4) Increase of user access through parallel rather than serial x-ray beam use within the constraint of a $300M-$400M Total Project Cost (TPC) range. The LCLS-II Project will construct: (1) A hard x-ray undulator source (2-13 keV); (2) A soft x-ray undulator source (250-2,000 eV); (3) A dedicated, independent electron source for these new undulators, using sectors 10-20 of the SLAC linac; (4) Modifications to existing SLAC facilities for the injector and new shielded enclosures for the undulator sources, beam dumps and x-ray front ends; (5) A new experiment hall capable of accommodating four experiment stations; and (6) Relocation of the two soft x-ray instruments in the existing Near Experiment Hall (NEH) to the new experiment hall (Experiment Hall-II). A key objective of LCLS-II is to maintain near-term international leadership in the study of matter on the fundamental atomic length scale and the associated ultrafast time scales of atomic motion and electronic transformation. Clearly, such studies promise scientific breakthroughs in key areas of societal needs like energy, environment, health and technology, and they are uniquely enabled by forefront X-ray Free Electron Laser (X-FEL) facilities. While the implementation of LCLS-II extends to about 2017, it is important to realize that

EBR-II Data Digitization

Energy Technology Data Exchange (ETDEWEB)

Yoon, Su-Jong [Idaho National Lab. (INL), Idaho Falls, ID (United States); Rabiti, Cristian [Idaho National Lab. (INL), Idaho Falls, ID (United States); Sackett, John [Idaho National Lab. (INL), Idaho Falls, ID (United States)

2014-08-01

1. Objectives To produce a validation database out of those recorded signals it will be necessary also to identify the documents need to reconstruct the status of reactor at the time of the beginning of the recordings. This should comprehends the core loading specification (assemblies type and location and burn-up) along with this data the assemblies drawings and the core drawings will be identified. The first task of the project will be identify the location of the sensors, with respect the reactor plant layout, and the physical quantities recorded by the Experimental Breeder Reactor-II (EBR-II) data acquisition system. This first task will allow guiding and prioritizing the selection of drawings needed to numerically reproduce those signals. 1.1 Scopes and Deliverables The deliverables of this project are the list of sensors in EBR-II system, the identification of storing location of those sensors, identification of a core isotopic composition at the moment of the start of system recording. Information of the sensors in EBR-II reactor system was summarized from the EBR-II system design descriptions listed in Section 1.2.

The Belle II Experiment

CERN Document Server

Kahn, J

2017-01-01

Set to begin data taking at the end of 2018, the Belle II experiment is the next-generation B-factory experiment hosted at KEK in Tsukuba, Japan. The experiment represents the cumulative effort from the collaboration of experimental and detector physics, computing, and software development. Taking everything learned from the previous Belle experiment, which ran from 1998 to 2010, Belle II aims to probe deeper than ever before into the field of heavy quark physics. By achieving an integrated luminosity of 50 ab−1 and accumulating 50 times more data than the previous experiment across its lifetime, along with a rewritten analysis framework, the Belle II experiment will push the high precision frontier of high energy physics. This paper will give an overview of the key components and development activities that make the Belle II experiment possible.

Digital optical computer II

Science.gov (United States)

Guilfoyle, Peter S.; Stone, Richard V.

1991-12-01

OptiComp is currently completing a 32-bit, fully programmable digital optical computer (DOC II) that is designed to operate in a UNIX environment running RISC microcode. OptiComp's DOC II architecture is focused toward parallel microcode implementation where data is input in a dual rail format. By exploiting the physical principals inherent to optics (speed and low power consumption), an architectural balance of optical interconnects and software code efficiency can be achieved including high fan-in and fan-out. OptiComp's DOC II program is jointly sponsored by the Office of Naval Research (ONR), the Strategic Defense Initiative Office (SDIO), NASA space station group and Rome Laboratory (USAF). This paper not only describes the motivational basis behind DOC II but also provides an optical overview and architectural summary of the device that allows the emulation of any digital instruction set.

TYPE II-P SUPERNOVAE FROM THE SDSS-II SUPERNOVA SURVEY AND THE STANDARDIZED CANDLE METHOD

International Nuclear Information System (INIS)

D'Andrea, Chris B.; Sako, Masao; Dilday, Benjamin; Jha, Saurabh; Frieman, Joshua A.; Kessler, Richard; Holtzman, Jon; Konishi, Kohki; Yasuda, Naoki; Schneider, D. P.; Sollerman, Jesper; Wheeler, J. Craig; Cinabro, David; Nichol, Robert C.; Lampeitl, Hubert; Smith, Mathew; Atlee, David W.; Bassett, Bruce; Castander, Francisco J.; Goobar, Ariel

2010-01-01

We apply the Standardized Candle Method (SCM) for Type II Plateau supernovae (SNe II-P), which relates the velocity of the ejecta of a SN to its luminosity during the plateau, to 15 SNe II-P discovered over the three season run of the Sloan Digital Sky Survey-II Supernova Survey. The redshifts of these SNe-0.027 0.01) as all of the current literature on the SCM combined. We find that the SDSS SNe have a very small intrinsic I-band dispersion (0.22 mag), which can be attributed to selection effects. When the SCM is applied to the combined SDSS-plus-literature set of SNe II-P, the dispersion increases to 0.29 mag, larger than the scatter for either set of SNe separately. We show that the standardization cannot be further improved by eliminating SNe with positive plateau decline rates, as proposed in Poznanski et al. We thoroughly examine all potential systematic effects and conclude that for the SCM to be useful for cosmology, the methods currently used to determine the Fe II velocity at day 50 must be improved, and spectral templates able to encompass the intrinsic variations of Type II-P SNe will be needed.

Expression Profiles of Cellular Retinol-binding Protein, Type II (CRBP II in Erlang Mountainous Chickens

Directory of Open Access Journals (Sweden)

H. D. Yin

2014-03-01

Full Text Available Cellular retinol-binding protein II (CRBP II belongs to the family of cellular retinol-binding proteins and plays a major role in absorption, transport, and metabolism of vitamin A. In addition, because vitamin A is correlated with reproductive performance, we measured CRBP II mRNA abundance in erlang mountainous chickens by real-time PCR using the relative quantification method. The expression of CRBP II showed a tissue-specific pattern and egg production rate-dependent changes. The expression was very high (p<0.05 in jejunum and liver, intermediate in kidney, ovary, and oviduct, and lowest (p<0.05 in heart, hypothalamus, and pituitary. In the hypothalamus, oviduct, ovary, and pituitary, CRBP II mRNA abundance were correlated to egg production rate, which increased from 12 wk to 32 wk, peaked at 32 wk relative to the other time points, and then decreased from 32 wk to 45 wk. In contrast, the expression of CRBP II mRNA in heart, jejunum, kidney, and liver was not different at any of the ages evaluated in this study. These data may help to understand the genetic basis of vitamin A metabolism, and suggest that CRBP II may be a candidate gene to affect egg production traits in chickens.

Nsls-II Boster

Science.gov (United States)

Gurov, S. M.; Akimov, A. V.; Akimov, V. E.; Anashin, V. V.; Anchugov, O. V.; Baranov, G. N.; Batrakov, A. M.; Belikov, O. V.; Bekhtenev, E. A.; Blum, E.; Bulatov, A. V.; Burenkov, D. B.; Cheblakov, P. B.; Chernyakin, A. D.; Cheskidov, V. G.; Churkin, I. N.; Davidsavier, M.; Derbenev, A. A.; Erokhin, A. I.; Fliller, R. P.; Fulkerson, M.; Gorchakov, K. M.; Ganetis, G.; Gao, F.; Gurov, D. S.; Hseuh, H.; Hu, Y.; Johanson, M.; Kadyrov, R. A.; Karnaev, S. E.; Karpov, G. V.; Kiselev, V. A.; Kobets, V. V.; Konstantinov, V. M.; Kolmogorov, V. V.; Korepanov, A. A.; Kramer, S.; Krasnov, A. A.; Kremnev, A. A.; Kuper, E. A.; Kuzminykh, V. S.; Levichev, E. B.; Li, Y.; Long, J. De; Makeev, A. V.; Mamkin, V. R.; Medvedko, A. S.; Meshkov, O. I.; Nefedov, N. B.; Neyfeld, V. V.; Okunev, I. N.; Ozaki, S.; Padrazo, D.; Petrov, V. V.; Petrichenkov, M. V.; Philipchenko, A. V.; Polyansky, A. V.; Pureskin, D. N.; Rakhimov, A. R.; Rose, J.; Ruvinskiy, S. I.; Rybitskaya, T. V.; Sazonov, N. V.; Schegolev, L. M.; Semenov, A. M.; Semenov, E. P.; Senkov, D. V.; Serdakov, L. E.; Serednyakov, S. S.; Shaftan, T. V.; Sharma, S.; Shichkov, D. S.; Shiyankov, S. V.; Shvedov, D. A.; Simonov, E. A.; Singh, O.; Sinyatkin, S. V.; Smaluk, V. V.; Sukhanov, A. V.; Tian, Y.; Tsukanova, L. A.; Vakhrushev, R. V.; Vobly, P. D.; Utkin, A. V.; Wang, G.; Wahl, W.; Willeke, F.; Yaminov, K. R.; Yong, H.; Zhuravlev, A.; Zuhoski, P.

The National Synchrotron Light Source II is a third generation light source, which was constructed at Brookhaven National Laboratory. This project includes a highly-optimized 3 GeV electron storage ring, linac preinjector, and full-energy synchrotron injector. Budker Institute of Nuclear Physics built and delivered the booster for NSLS-II. The commissioning of the booster was successfully completed. This paper reviews fulfilled work by participants.

Neuroprotective Effects and Mechanisms of Curcumin-Cu(II) and -Zn(II) Complexes Systems and Their Pharmacological Implications.

Science.gov (United States)

Yan, Fa-Shun; Sun, Jian-Long; Xie, Wen-Hai; Shen, Liang; Ji, Hong-Fang

2017-12-28

Alzheimer's disease (AD) is the main form of dementia and has a steadily increasing prevalence. As both oxidative stress and metal homeostasis are involved in the pathogenesis of AD, it would be interesting to develop a dual function agent, targeting the two factors. Curcumin, a natural compound isolated from the rhizome of Curcuma longa , is an antioxidant and can also chelate metal ions. Whether the complexes of curcumin with metal ions possess neuroprotective effects has not been evaluated. Therefore, the present study was designed to investigate the protective effects of the complexes of curcumin with Cu(II) or Zn(II) on hydrogen peroxide (H₂O₂)-induced injury and the underlying molecular mechanisms. The use of rat pheochromocytoma (PC12) cells, a widely used neuronal cell model system, was adopted. It was revealed that curcumin-Cu(II) complexes systems possessed enhanced O₂ ·- -scavenging activities compared to unchelated curcumin. In comparison with unchelated curcumin, the protective effects of curcumin-Cu(II) complexes systems were stronger than curcumin-Zn(II) system. Curcumin-Cu(II) or -Zn(II) complexes systems significantly enhanced the superoxide dismutase, catalase, and glutathione peroxidase activities and attenuated the increase of malondialdehyde levels and caspase-3 and caspase-9 activities, in a dose-dependent manner. The curcumin-Cu(II) complex system with a 2:1 ratio exhibited the most significant effect. Further mechanistic study demonstrated that curcumin-Cu(II) or -Zn(II) complexes systems inhibited cell apoptosis via downregulating the nuclear factor κB (NF-κB) pathway and upregulating Bcl-2/Bax pathway. In summary, the present study found that curcumin-Cu(II) or -Zn(II) complexes systems, especially the former, possess significant neuroprotective effects, which indicates the potential advantage of curcumin as a promising agent against AD and deserves further study.

Spin Crossover in Fe(II)-M(II) Cyanoheterobimetallic Frameworks (M = Ni, Pd, Pt) with 2-Substituted Pyrazines.

Science.gov (United States)

Kucheriv, Olesia I; Shylin, Sergii I; Ksenofontov, Vadim; Dechert, Sebastian; Haukka, Matti; Fritsky, Igor O; Gural'skiy, Il'ya A

2016-05-16

Discovery of spin-crossover (SCO) behavior in the family of Fe(II)-based Hofmann clathrates has led to a "new rush" in the field of bistable molecular materials. To date this class of SCO complexes is represented by several dozens of individual compounds, and areas of their potential application steadily increase. Starting from Fe(2+), square planar tetracyanometalates M(II)(CN)4(2-) (M(II) = Ni, Pd, Pt) and 2-substituted pyrazines Xpz (X = Cl, Me, I) as coligands we obtained a series of nine new Hofmann clathrate-like coordination frameworks. X-ray diffraction reveals that in these complexes Fe(II) ion has a pseudo-octahedral coordination environment supported by four μ4-tetracyanometallates forming its equatorial coordination environment. Depending on the nature of X and M, axial positions are occupied by two 2X-pyrazines (X = Cl and M(II) = Ni (1), Pd (2), Pt (3); X = Me and M(II) = Ni (4), Pd (5)) or one 2X-pyrazine and one water molecule (X = I and M(II) = Ni (7), Pd (8), Pt (9)), or, alternatively, two distinct Fe(II) positions with either two pyrazines or two water molecules (X = Me and M(II) = Pt (6)) are observed. Temperature behavior of magnetic susceptibility indicates that all compounds bearing FeN6 units (1-6) display cooperative spin transition, while Fe(II) ions in N5O or N4O2 surrounding are high spin (HS). Structural changes in the nearest Fe(II) environment upon low-spin (LS) to HS transition, which include ca. 10% Fe-N distance increase, lead to the cell expansion. Mössbauer spectroscopy is used to characterize the spin state of all HS, LS, and intermediate phases of 1-9 (see abstract figure). Effects of a pyrazine substituent and M(II) nature on the hyperfine parameters in both spin states are established.

The synthesis and characterization of 1,2-dihydroxyimino-3,6-di-aza-8,9-O-iso-butylidene nonane and its complexes with Ni(II), Cu(II), Zn(II) and Cd(II)

International Nuclear Information System (INIS)

Canpolat, E.; Kaya, M.; Gorgulu, A.O.

2002-01-01

1,2-dihydroxyimino-3,6-di-aza-8,9-O-iso-butylidene nonane (H 2 L) was synthesized starting from 1,2-O-iso-butylidene-4-aza-6-amino hexane (RNH 2 ) and antichloroglyoxime. Ni(II) and Cu(II) complexes of H 2 L have a metal:ligand ratio 1:2 and the ligand coordinates through two N atoms, as do most of the vic-dioximes. However, Zn(II) and Cd(II) complexes of H 2 L have a metal: ligand ratio 1:1 and one chloride ion and one water molecule are also coordinated to the metal ion. Structures of the ligand and its transition-metal complexes are proposed, according to elemental analysis, IR, 13 C and 1 H NMR spectra, magnetic susceptibility measurements and thermogravimetric analyses (TGA). (author)

High precision measurements of hyperfine structure in Tm II, N2+ and Sc II

International Nuclear Information System (INIS)

Mansour, N.B.; Dinneen, T.P.; Young, L.

1988-01-01

We have applied the technique of collinear fast-ion-beam laser spectroscopy to measure the hyperfine structure (hfs) in Sc II, Tm II and N 2 + . Laser induced fluorescence was observed from a 50 keV ion beam which was superimposed with the output of an actively stabilized ring dye laser (rms bandwidth 2 and the excited 3d4p configuration of Sc II and in the 4f 13 6s and 4f 13 5d configurations of the Tm II. The fine and hyperfine structure of N 2 + has been observed in the (0,1) and (1,2) band of B 2 Σ/sub u/ + /minus/X 2 Σ/sub g/ + system. Higher resolution measurements of the metastable 3d 2 configuration in Sc II were also made by laser-rf double resonance. The experimental results will be compared with those obtained by multiconfiguration Hartree-Fock ab-initio calculations. 15 refs., 4 figs., 5 tabs

Mo/Si multilayers with enhanced TiO II- and RuO II-capping layers

Science.gov (United States)

Yulin, Sergiy; Benoit, Nicolas; Feigl, Torsten; Kaiser, Norbert; Fang, Ming; Chandhok, Manish

2008-03-01

The lifetime of Mo/Si multilayer-coated projection optics is one of the outstanding issues on the road of commercialization of extreme-ultraviolet lithography (EUVL). The application of Mo/Si multilayer optics in EUVL requires both sufficient radiation stability and also the highest possible normal-incidence reflectivity. A serious problem of conventional high-reflective Mo/Si multilayers capped by silicon is the considerable degradation of reflective properties due to carbonization and oxidation of the silicon surface layer under exposure by EUV radiation. In this study, we focus on titanium dioxide (TiO II) and ruthenium dioxide (RuO II) as promising capping layer materials for EUVL multilayer coatings. The multilayer designs as well as the deposition parameters of the Mo/Si systems with different capping layers were optimized in terms of maximum peak reflectivity at the wavelength of 13.5 nm and longterm stability under high-intensive irradiation. Optimized TiO II-capped Mo/Si multilayer mirrors with an initial reflectivity of 67.0% presented a reflectivity drop of 0.6% after an irradiation dose of 760 J/mm2. The reflectivity drop was explained by the partial oxidation of the silicon sub-layer. No reflectivity loss after similar irradiation dose was found for RuO II-capped Mo/Si multilayer mirrors having initial peak reflectivity of 66%. In this paper we present data on improved reflectivity of interface-engineered TiO II- and RuO II-capped Mo/Si multilayer mirrors due to the minimization of both interdiffusion processes inside the multilayer stack and absorption loss in the oxide layer. Reflectivities of 68.5% at the wavelength of 13.4 nm were achieved for both TiO II- and RuO II-capped Mo/Si multilayer mirrors.

Data handling at EBR-II [Experimental Breeder Reactor II] for advanced diagnostics and control work

International Nuclear Information System (INIS)

Lindsay, R.W.; Schorzman, L.W.

1988-01-01

Improved control and diagnostics systems are being developed for nuclear and other applications. The Experimental Breeder Reactor II (EBR-II) Division of Argonne National Laboratory has embarked on a project to upgrade the EBR-II control and data handling systems. The nature of the work at EBR-II requires that reactor plant data be readily available for experimenters, and that the plant control systems be flexible to accommodate testing and development needs. In addition, operational concerns require that improved operator interfaces and computerized diagnostics be included in the reactor plant control system. The EBR-II systems have been upgraded to incorporate new data handling computers, new digital plant process controllers, and new displays and diagnostics are being developed and tested for permanent use. In addition, improved engineering surveillance will be possible with the new systems

pH-dependence of the specific binding of Cu(II) and Zn(II) ions to the amyloid-β peptide