WorldWideScience

Sample records for rene theophile hyacinthe

  1. Gerd Neggo stipendiumi sai Rene Nõmmik

    Index Scriptorium Estoniae

    2012-01-01

    Eesti Tantsuhariduse Liit andis tänavuse Gerd Neggo nimelise tantsuõpetaja stipendiumi Rene Nõmmikule, kes on üks Fine 5 tantsuteatri ja kooli asutajatest ning Tallinna Ülikooli tantsukunsti õppejõud

  2. Rene Berting : Bordelli sulgemine prostituuti uut ametit otsima ei pane / Rene Berting ; interv. Sigrid Laev

    Index Scriptorium Estoniae

    Berting, Rene

    2006-01-01

    Keskkriminaalpolitsei menetlusosakonna politseidirektori Rene Bertingu sõnul jätkub Eestis prostitutsiooni seniks, kuni Ida-Virumaal on kehva sotsiaalse seisu tõttu naisi, kes on valmis seda tööd tegema

  3. Rene Berting : Bordelli sulgemine prostituuti uut ametit otsima ei pane / Rene Berting ; interv. Sigrid Laev

    Index Scriptorium Estoniae

    Berting, Rene

    2006-01-01

    Keskkriminaalpolitsei menetlusosakonna politseidirektori Rene Bertingu sõnul jätkub Eestis prostitutsiooni seniks, kuni Ida-Virumaal on kehva sotsiaalse seisu tõttu naisi, kes on valmis seda tööd tegema

  4. Elamismudelite otsingul / Leena Torim, Rene Valner

    Index Scriptorium Estoniae

    Torim, Leena

    2009-01-01

    Arhitektid Leena Torim ja Rene Valner on mitu aastat tegelnud lihtsate, tervislike ja keskkonnasõbralike eluasemete projekteerimise ja ehitamisega. Nende eesmärk on luua esmajoones elukvaliteeti ja alles seejärel arhitektuuri. Omadustest, mis peavad olema heal majal. Tulevikuarhitektuurist

  5. Spot On! Engelske plakater fra mellemkrigsårene - genstandstekster

    DEFF Research Database (Denmark)

    Christensen, Line Hjorth

    2015-01-01

    genstandstekster til udstillingen Spot On! Engelske plakater fra mellemkrigsårene. alle tekster oversat til engelsk, men postes her i den danske udgave......genstandstekster til udstillingen Spot On! Engelske plakater fra mellemkrigsårene. alle tekster oversat til engelsk, men postes her i den danske udgave...

  6. Accreditation to supervise research of Rene Brennetot; Habilitation a diriger des recherches de Rene Brennetot

    Energy Technology Data Exchange (ETDEWEB)

    Brennetot, Rene

    2009-09-08

    The author (Rene Brennetot) recalls his scientific career (diplomas, professional education, teaching activities, expertise, publications), presents his PhD works, his post-PhD works (laser ablation on liquids, sorting of aluminium alloys by laser induced breakdown spectroscopy or LIBS, Mars elemental analysis by LIBS - MALIS), and his current works (elemental and isotopic analyses on irradiated fuels, resolution of interferences in Inductively Coupled Plasma Mass Spectrometry or ICP-MS) and his perspectives and projects (validation of new measurement methods on nuclear matrices, investigation of ion-gas reactions in the collision/reaction cell of ICP-MS)

  7. Invasion and control of water hyacinth (Eichhornia crassipes) in China

    Institute of Scientific and Technical Information of China (English)

    CHU Jian-jun; DING Yi; ZHUANG Qi-jia

    2006-01-01

    By the time of primary 21st century, water hyacinth had become a serious environmental problem in China. Water hyacinth contributes to the major part of ecological hazards from the invasion of foreign plant species, which is estimated about USD 7 billion a year in values.In the past 10 years, herbicides glyphosate, 2,4-D and paraquat have been used in controlling water hyacinth in China. Although the herbicides provided effective control on the weed in some areas, they could not provide the sustainable inhibition on the weed population, while would lead to pollution on water at various levels. At present, the herbicide application on water hyacinth is forbidden in many areas of China such as Shanghai. In this situation, the asexual reproduction inhibitor, KWH02, was invented for controlling water hyacinth and it provided about 70% of growth inhibition without any risk of dead plant pollution.It has been about 10 years for bio-control of water hyacinth in China. Works focused on mainly the efficacy and safety of the utilization of foreign insects. Researches on microorganism herbicides to control water hyacinth were started and obtained primary achievements in recent years.Although there are different opinions on how to face the water hyacinth problem in China, it is accepted widely that the control methods should be high efficient and safe with low cost. Some practical measures for integrated management of water hyacinth are suggested.

  8. Invasion and control of water hyacinth (Eichhornia crassipes) in China.

    Science.gov (United States)

    Chu, Jian-jun; Ding, Yi; Zhuang, Qi-jia

    2006-08-01

    By the time of primary 21st century, water hyacinth had become a serious environmental problem in China. Water hyacinth contributes to the major part of ecological hazards from the invasion of foreign plant species, which is estimated about USD 7 billion a year in values. In the past 10 years, herbicides glyphosate, 2,4-D and paraquat have been used in controlling water hyacinth in China. Although the herbicides provided effective control on the weed in some areas, they could not provide the sustainable inhibition on the weed population, while would lead to pollution of water at various levels. At present, the herbicide application on water hyacinth is forbidden in many areas of China such as Shanghai. In this situation, the asexual reproduction inhibitor, KWH02, was invented for controlling water hyacinth and it provided about 70% of growth inhibition without any risk of dead plant pollution. It has been about 10 years for bio-control of water hyacinth in China. Works focused on mainly the efficacy and safety of the utilization of foreign insects. Researches on microorganism herbicides to control water hyacinth were started and obtained primary achievements in recent years. Although there are different opinion on how to face the water hyacinth problem in China, it is accepted widely that the control methods should be high efficient and safe with low cost. Some practical measures for integrated management of water hyacinth are suggested.

  9. Powder metallurgy Rene 95 rotating turbine engine parts, volume 2

    Science.gov (United States)

    Wilbers, L. G.; Redden, T. K.

    1981-01-01

    A Rene 95 alloy as-HIP high pressure turbine aft shaft in the CF6-50 engine and a HIP plus forged Rene 95 compressor disk in the CFM56 engine were tested. The CF6-50 engine test was conducted for 1000 C cycles and the CFM56 test for 2000 C cycles. Post test evaluation and analysis of the CF6-50 shaft and the CFM56 compressor disk included visual, fluorescent penetrant, and dimensional inspections. No defects or otherwise discrepant conditions were found. These parts were judged to have performed satisfactorily.

  10. Writing, Teaching, and Researching: An Interview with Rene Saldana, Jr.

    Science.gov (United States)

    Saldana, Rene, Jr.; Moore, David W.

    2010-01-01

    Rene Saldana, Jr., an assistant professor at Texas Tech University, is a writer of short stories, poetry, and novels. In order to get his storytelling right, he has relied on his memory when writing memoirs and consulted popular culture and family when writing fiction. In order to get his university teaching right, he reads seminal texts on…

  11. God has moved. Long live the God! / Rene Fischer

    Index Scriptorium Estoniae

    Fischer, Rene

    2004-01-01

    Reklaamifirma Tank senine shveitslasest loovjuht Rene Fischer oma tööst ettevõttes, firma edukuse võimalikest põhjustest, olukorrast Baltimaade reklaamiturul, Läti reklaamifirma Bates/Red Cell loovjuhiks lahkumise põhjustest ning eesmärkidest uuel töökohal. Lisad: Other stuff; Technical data

  12. God has moved. Long live the God! / Rene Fischer

    Index Scriptorium Estoniae

    Fischer, Rene

    2004-01-01

    Reklaamifirma Tank senine shveitslasest loovjuht Rene Fischer oma tööst ettevõttes, firma edukuse võimalikest põhjustest, olukorrast Baltimaade reklaamiturul, Läti reklaamifirma Bates/Red Cell loovjuhiks lahkumise põhjustest ning eesmärkidest uuel töökohal. Lisad: Other stuff; Technical data

  13. Rene Valner ja Mikk Suursild - lihtsa elu tegelased / Susan Lahesalu

    Index Scriptorium Estoniae

    Lahesalu, Susan

    2007-01-01

    Arhitekt Rene Valner ja Mikk Suursild - tandem nimega UNITe - ehitavad ökonoomseid ja ökoloogilisi looduslikest materjalidest maju. Nende koostöös on valminud ka Peipsi ääres Nina külas 3 põhumaja. Ott Kadariku, Margit Mutso ja Kuido Kartau kommentaarid

  14. Rene Magritte, Constructivism, and the Researcher as Interpreter.

    Science.gov (United States)

    Stake, Robert; Kerr, Dale

    1995-01-01

    This paper examines the art of Rene Magritte to illustrate how artworks provide a number of dimensions for realizing experience, for creating knowledge, and for a changed role of interpretation in educational research. The paper argues that works of art provide new gestalts and new grounds for confidence. (JB)

  15. Nitrogen phytoremediation by water hyacinth (Eichhornia crassipes (Mart.) Solms)

    NARCIS (Netherlands)

    Fox, L.J.; Struik, P.C.; Appleton, B.L.; Rule, J.H.

    2008-01-01

    The phytoremediation potential of water hyacinth, Eichhornia crassipes (Mart.) Solms, was examined in two independent studies under nitrogen (N) rates of 0, 40, 80, 100, 150, 200, and 300 ppm. A modified Hoagland solution was added to ponds containing water hyacinths which were rated and measured we

  16. Nitrogen phytoremediation by water hyacinth (Eichhornia crassipes (Mart.) Solms)

    NARCIS (Netherlands)

    Fox, L.J.; Struik, P.C.; Appleton, B.L.; Rule, J.H.

    2008-01-01

    The phytoremediation potential of water hyacinth, Eichhornia crassipes (Mart.) Solms, was examined in two independent studies under nitrogen (N) rates of 0, 40, 80, 100, 150, 200, and 300 ppm. A modified Hoagland solution was added to ponds containing water hyacinths which were rated and measured

  17. A New Image for the Water Hyacinth

    Science.gov (United States)

    1980-01-01

    Walt Disney Company activated a sewage treatment plan using NASA technology to create water hyacinths to clean wastewater by absorbing and metabolizing pollutants. Plants have exciting promise as a natural water purification system which can be established at a fraction of the cost of a conventional sewage treatment facility. Harvested plants can be used as fertilizer. They can also be heat-treated to produce consumer energy in the form of methane gas. If an economical method of drying plants can be developed they may find further utility as high protein animal feed.

  18. Water hyacinth a potential source for value addition: An overview.

    Science.gov (United States)

    Sindhu, Raveendran; Binod, Parameswaran; Pandey, Ashok; Madhavan, Aravind; Alphonsa, Jose Anju; Vivek, Narisetty; Gnansounou, Edgard; Castro, Eulogio; Faraco, Vincenza

    2017-04-01

    Water hyacinth a fresh water aquatic plant is considered as a noxious weed in many parts of the world since it grows very fast and depletes nutrients and oxygen from water bodies adversely affecting the growth of both plants and animals. Hence conversion of this problematic weed to value added chemicals and fuels helps in the self-sustainability especially for developing countries. The present review discusses the various value added products and fuels which can be produced from water hyacinth, the recent research and developmental activities on the bioconversion of water hyacinth for the production of fuels and value added products as well as its possibilities and challenges in commercialization.

  19. BIOCONVERSION OF WATER HYACINTH HYDROLYSATE INTO ETHANOL

    Directory of Open Access Journals (Sweden)

    Sunita Bandopadhyay Mukhopadhyay

    2010-04-01

    Full Text Available The fast growing aquatic weed water hyacinth, which is available almost year-round in the tropics and subtropics, was utilized as the chief source of cellulose for production of fuel ethanol via enzymatic hydrolysis and fermentation. Fungal cellulases produced on-site by utilizing acid-alkali pretreated water hyacinth as the substrate were used as the crude enzyme source for hydrolysis of identically pretreated biomass. Four different modes of enzymatic hydrolysis and fermentation were trialed in the present study for optimization of the yield of ethanol. Two common yeasts viz., Saccharomyces cerevisiae and Pachysolen tannophilus, were used for fermentation of hexose and pentose sugars in the hydrolysate. Significant enhancement of concentration (8.3 g/L and yield (0.21 g/g of ethanol was obtained through a prefermentation hydrolysis-simultaneous saccharification and fermentation (PH-SSF process, over the other three processes viz., separate hydrolysis and fermentation (SHF, simultaneous saccharification and fermentation (SSF, and single batch bioconversion (SBB by utilizing fungal culture broth with and without filtration as crude enzyme source.

  20. Potential Of Water Hyacinth ( Eichhornia crassipes ) In Treating ...

    African Journals Online (AJOL)

    ... water hyacinth (Eichhornia crassipes) as a means for water pollution abatement was investigated. Two types of industrial wastewaters, namely that from the textile/dyeing industry and raw sugar manufacturing were studied in batch systems.

  1. IONS FROM AQUEOUS PHASE BY WATER HYACINTH (Eichhornia ...

    African Journals Online (AJOL)

    Preferred Customer

    KEY WORDS: Water hyacinth, Biosorption, Kinetics, Water treatment, Pb(II) removal ... waters. Conventional technologies used to remove heavy metals from ... time as it is inefficient when dealing with large volume of industrial waste water.

  2. Phosphorus release from decomposing water hyacinth and effects of ...

    African Journals Online (AJOL)

    Mo

    Hyacinth plants from the lake were chopped to fine pieces. In replicate ... Soluble phosphorus, pH, conductivity, and dissolved oxygen were measured daily for one month. In non- ... few investigations have demonstrated the importance of.

  3. Hydrogen production from water hyacinth through dark- and photo- fermentation

    Energy Technology Data Exchange (ETDEWEB)

    Su, Huibo; Cheng, Jun; Zhou, Junhu; Song, Wenlu; Cen, Kefa [State Key Laboratory of Clean Energy Utilization, Zhejiang University, Hangzhou 310027 (China)

    2010-09-15

    This article discusses the method of producing hydrogen from water hyacinth. Water hyacinth was pretreated with microwave heating and alkali to enhance the enzymatic hydrolysis and hydrogen production in a two-step process of dark- and photo- fermentation. Water hyacinth with various concentrations of 10-40 g/l was pretreated with four methods: (1) steam heating; (2) steam heating and microwave heating/alkali pretreatment; (3) steam heating and enzymatic hydrolysis; (4) steam heating, microwave heating/alkali pretreatment and enzymatic hydrolysis. Water hyacinth (20 g/l) pretreated with method 4 gave the maximum reducing sugar yield of 30.57 g/100 g TVS, which was 45.6% of the theoretical reducing sugar yield (67.0 g/100 g TVS). The pretreated water hyacinth was used to produce hydrogen by mixed H{sub 2}-producing bacteria in dark fermentation. The maximum hydrogen yield of 76.7 ml H{sub 2}/g TVS was obtained at 20 g/l of water hyacinth. The residual solutions from dark fermentation (mainly acetate and butyrate) were used to further produce hydrogen by immobilized Rhodopseudomonas palustris in photo fermentation. The maximum hydrogen yield of 522.6 ml H{sub 2}/g TVS was obtained at 10 g/l of water hyacinth. Through a combined process of dark- and photo- fermentation, the maximum hydrogen yield from water hyacinth was dramatically enhanced from 76.7 to 596.1 ml H{sub 2}/g TVS, which was 59.6% of the theoretical hydrogen yield. (author)

  4. Anaerobic co-digestion of water hyacinth and cow dung for biogas production

    OpenAIRE

    OROKA FRANK OKE; AKHIHIERO THELMA

    2015-01-01

    Co-digestion of water hyacinth and cow dung under anaerobic condition was studied. Results indicate a progressive increase in biogas yield with increased cow dung in the co-ferment mixture of water hyacinth: cow dung

  5. Rev Rene completes 15 years: victories and new challenges

    Directory of Open Access Journals (Sweden)

    Maria de Nazaré de Oliveira Fraga

    2015-09-01

    Full Text Available There are times when we do not know which words to use. They throw themselves on paper, some or many of them without knowing exactly what will result, as a call for help on what they can show. So simple, so flexible, so hard, so complex they are. The request to write an editorial for the Rene Journal gave me the wheel of time. I’m retired of University teaching and research for a decade and a half. I was editor in chief and also section editor in the mental health area of ​​this journal. So I have a lot to remember.

  6. Ecological effects of water hyacinth (Eichhornia crassipes) on Lake Chapala, Mexico

    OpenAIRE

    Villamagna, Amy Marie

    2009-01-01

    Water hyacinth (Eichhornia crassipes) is a floating non-native plant that has been reoccurring in Lake Chapala, Jalisco, Mexico for more than 100 years. In this research, I explore the effects of water hyacinth on freshwater ecosystems worldwide and specifically on Lake Chapala. In chapter 1, I reviewed studies conducted on water hyacinth worldwide and found that the effects of water hyacinth on water quality are similar but the magnitude of effects is dependent on the percent cover and p...

  7. Narvas näeb Eesti tantsuauhinna võitnud tantsulavastust / Rene Nõmmik ; intervjueerinud Tiia Linnart

    Index Scriptorium Estoniae

    Nõmmik, Rene, 1962-

    2015-01-01

    Narva kultuurimajas Rugodiv näeb Fine5 tantsuteatri lavastust "...and blue", mis võitis tänavu Eesti teatriauhinna. Etenduse koreograafideks ja lavastajateks on Tiina Ollesk ja Rene Nõmmik, keda on palutud lavastama ka Venemaale. Intervjuu Rene Nõmmikuga

  8. Narvas näeb Eesti tantsuauhinna võitnud tantsulavastust / Rene Nõmmik ; intervjueerinud Tiia Linnart

    Index Scriptorium Estoniae

    Nõmmik, Rene, 1962-

    2015-01-01

    Narva kultuurimajas Rugodiv näeb Fine5 tantsuteatri lavastust "...and blue", mis võitis tänavu Eesti teatriauhinna. Etenduse koreograafideks ja lavastajateks on Tiina Ollesk ja Rene Nõmmik, keda on palutud lavastama ka Venemaale. Intervjuu Rene Nõmmikuga

  9. Viljandi on ideaalne linn vitraažikunsti jaoks. / Renee Aua ; interv. Tiiu Männiste

    Index Scriptorium Estoniae

    Aua, Renee

    1998-01-01

    Vestlus Viljandist pärit vitraažikunstniku Reneé Auaga vitraažikunstist seoses näitusega "Aprillinägu vaatab klaasi" Kilpkonna galeriis Viljandis. Galeriis eksponeeritakse Reneé Aua ja Sofi Arshase minivitraaže ning Reimo Rüntü portreid ja kompositsioone eri tehnikates

  10. 21 CFR 177.1020 - Acrylonitrile/butadiene/sty-rene co-polymer.

    Science.gov (United States)

    2010-04-01

    ... 21 Food and Drugs 3 2010-04-01 2009-04-01 true Acrylonitrile/butadiene/sty-rene co-polymer. 177... SERVICES (CONTINUED) FOOD FOR HUMAN CONSUMPTION (CONTINUED) INDIRECT FOOD ADDITIVES: POLYMERS Substances.../butadiene/sty-rene co-polymer. Acrylonitrile/butadiene/styrene copolymer identified in this section may be...

  11. ENPA juht usub Vene arengusse / Rene van der Linden ; interv. Erkki Bahovski

    Index Scriptorium Estoniae

    Linden, Rene van der

    2006-01-01

    Vt. ka Postimees : na russkom jazõke 2. juuni lk. 7. Euroopa Nõukogu Parlamentaarse Assamblee president Rene van der Linden Euroopa Nõukogu (EN) rollist, Venemaa ja Eesti arengutest EN-i liikmena. Lisa: Euroopa parlamentide kogu

  12. ENPA juht usub Vene arengusse / Rene van der Linden ; interv. Erkki Bahovski

    Index Scriptorium Estoniae

    Linden, Rene van der

    2006-01-01

    Vt. ka Postimees : na russkom jazõke 2. juuni lk. 7. Euroopa Nõukogu Parlamentaarse Assamblee president Rene van der Linden Euroopa Nõukogu (EN) rollist, Venemaa ja Eesti arengutest EN-i liikmena. Lisa: Euroopa parlamentide kogu

  13. Eestlane paneb sõiduautod liikuma Transsiberi raudteel / Rene Varek ; interv. Tanel Raig

    Index Scriptorium Estoniae

    Varek, Rene, 1972-

    2009-01-01

    Railtransauto kommertsdirektor Rene Varek vastab küsimustele, mis puudutavad tema igapäevast tööd ettevõttes, seatud eesmärke ja nende täitmist, Mazdade transpordiprojekti, Transsiberi raudtee kasutamise eeliseid, ettevõtte veomahtusid ning Muuga sadama konteinerterminali rajamise edasilükkamise mõju Eesti transpordiettevõtetele. Vt. samas: Rene Varek; Railtransauto Ltd

  14. Eestlane paneb sõiduautod liikuma Transsiberi raudteel / Rene Varek ; interv. Tanel Raig

    Index Scriptorium Estoniae

    Varek, Rene, 1972-

    2009-01-01

    Railtransauto kommertsdirektor Rene Varek vastab küsimustele, mis puudutavad tema igapäevast tööd ettevõttes, seatud eesmärke ja nende täitmist, Mazdade transpordiprojekti, Transsiberi raudtee kasutamise eeliseid, ettevõtte veomahtusid ning Muuga sadama konteinerterminali rajamise edasilükkamise mõju Eesti transpordiettevõtetele. Vt. samas: Rene Varek; Railtransauto Ltd

  15. Competitive sorption of heavy metals by water hyacinth roots.

    Science.gov (United States)

    Zheng, Jia-Chuan; Liu, Hou-Qi; Feng, Hui-Min; Li, Wen-Wei; Lam, Michael Hon-Wah; Lam, Paul Kwan-Sing; Yu, Han-Qing

    2016-12-01

    Heavy metal pollution is a global issue severely constraining aquaculture practices, not only deteriorating the aquatic environment but also threatening the aquaculture production. One promising solution is adopting aquaponics systems where a synergy can be established between aquaculture and aquatic plants for metal sorption, but the interactions of multiple metals in such aquatic plants are poorly understood. In this study, we investigated the absorption behaviors of Cu(II) and Cd(II) in water by water hyacinth roots in both single- and binary-metal systems. Cu(II) and Cd(II) were individually removed by water hyacinth roots at high efficiency, accompanied with release of protons and cations such as Ca(2+) and Mg(2+). However, in a binary-metal arrangement, the Cd(II) sorption was significantly inhibited by Cu(II), and the higher sorption affinity of Cu(II) accounted for its competitive sorption advantage. Ionic exchange was identified as a predominant mechanism of the metal sorption by water hyacinth roots, and the amine and oxygen-containing groups are the main binding sites accounting for metal sorption via chelation or coordination. This study highlights the interactive impacts of different metals during their sorption by water hyacinth roots and elucidates the underlying mechanism of metal competitive sorption, which may provide useful implications for optimization of phytoremediation system and development of more sustainable aquaculture industry.

  16. Bio-hydrogen production from hyacinth by anaerobic fermentation

    Energy Technology Data Exchange (ETDEWEB)

    Cheng Jun; Zhou Junhu; Qi Feng; Xie Binfei; Cen Kefa [State Key Laboratory of Clean Energy Utilization, Zhejiang University No.38 Zheda Road, Hangzhou 310027, (China)

    2006-07-01

    The bio-hydrogen production from hyacinth by anaerobic fermentation of digested sludge is studied in this paper. The compositions of bio-gases and volatile fatty acids in fermentation liquids are determined on TRACE 2000 gas chromatography. It is found that the H{sub 2} concentration in the biogas is 10%-20% and no CH{sub 4} is detected. The bio-hydrogen production from hyacinth with the initial pH value of 5.5 is higher than that with the initial pH value of 4.5. The fermentation temperature of 55 C is better than that of 35 C, while the weight ratio of hyacinth to microorganism of 1:1 is better than that of 3:7. The highest hydrogen production of 122.3 mL/g is obtained when the initial pH value of fermentation solution is 5.5, the fermentation temperature is 55 C and the weight ratio of hyacinth to microorganism is 1:1. (authors)

  17. Water hyacinth system for municipal landfill leachate treatment

    Energy Technology Data Exchange (ETDEWEB)

    El-Gendy, A.S.; Biswas, N.; Bewtra, J.K. [Univ. of Windsor, Dept. of Civil and Environmental Engineering, Windsor, Ontario (Canada)

    2002-06-15

    Batch experiments were conducted in a green house environment to investigate the ability of water hyacinth (Eichhornia crassipes) to treat municipal landfill leachate. The experiments were carried out on leachate samples collected from Essex-Windsor Regional Landfill, Windsor, Ontario, Canada. Three leachate dilutions were used in the study. In addition to plant growth, leachate constituents such as pH, alkalinity, chemical oxygen demand (COD), ammonia, total Kjeldahl nitrogen (TKN), nitrate, reactive phosphate, total iron, potassium and chloride were also determined. These parameters were analyzed at different times covering the duration of the experiments. The experimental data showed that water hyacinth system was capable of reducing total nitrogen in the leachate. The pH level remained around 8.0. High consumption of alkalinity during the first three weeks was observed, which could be attributed to nitrification of ammonia. Ammonia nitrogen and total reactive phosphate were removed completely, whereas potassium and chloride remained unchanged. Landfill leachate has a negative impact on plant growth. As the concentration of leachate increases, its toxicity increases resulting in the decrease in the growth of water hyacinth. Water hyacinth system seems to be a promising technology for treating municipal landfill leachate. However, additional studies are required to investigate the system tolerance for some pollutants that might be present in leachate at wide ranges of concentrations such as salinities, hydrogen ion concentration, and heavy metals. (author)

  18. NUTRITIVE VALUE OF WATER HYACINTH (Eichhornia crassipes

    Directory of Open Access Journals (Sweden)

    Md. Emran HOSSAIN

    2016-03-01

    Full Text Available The study was undertaken to find out the chemical composition and nutritive value of Water Hyacinth (Eichhornia crassipes available in Chittagong, Bangladesh. Eichhornia crassipes samples were collected from three different remote places of the study area. Chemical analyses of the samples were carried out in triplicate for dry matter (DM, crude protein (CP, crude fiber (CF, nitrogen free extracts (NFE, ether extracts (EE and total ash (TA in the animal nutrition and poultry research and training centre (PRTC laboratory, Chittagong Veterinary and Animal Sciences University, Chittagong, Bangladesh. Metabolizable energy (ME was estimated mathematically for all samples by using standard formula. Results indicated that, there were no significant variations (P>0.05 in the DM, CP, CF, NFE, EE and TA contents of the samples collected from different places. DM content varied from 8.7 to 9.3 g/100g, CP content varied from 10.1 to 11.2 g/100g, CF content varied from 26.1 to 27.4 g/100g, EE content varied from 1.1 to 1.8 g/100g, NFE content varied from 47.2 to 50.2 g/100g and TA content varied from 12.3 to 12.4 g/100g. Similarly, metabolizable energy (ME content also varied from 1999.7 to 2054.1 Kcal/kg DM. It could therefore be inferred that, the nutrient contents of Eichhornia crassipes does not vary due to variation in geographical location. Nutritionally, Eichhornia crassipes seems sound enough to be utilized as feed for livestock especially during scarcity period.

  19. Review of current interest and research in water hyacinth-based wastewater treatment

    Science.gov (United States)

    Markarian, R. K.; Balon, J. E.; Robinson, A. C.

    1977-01-01

    The status of activity in the user community for water hyacinth-based wastewater treatment was evaluated. The principal technique used was that of interviewing people who either (1) were known to be engaged in hyacinth research or development or (2) had made inquiry to NASA about hyacinth systems. About 40 non-research organizations and a similar number of research organizations were contacted. As a result of the interviews and a review of the relevant literature, it was concluded that hyacinth systems have the potential for providing a lower cost way for small cities to meet increasingly stringent effluent requirements. A limited amount of full-scale demonstration of hyacinth systems has been carried out during the past two years, but the yield of design data has been small. Several organizations are currently planning construction of experimental full-scale hyacinth-based wastewater treatment systems during 1977-1978.

  20. Municipal landfill leachate treatment for metal removal using water hyacinth in a floating aquatic system.

    Science.gov (United States)

    El-Gendy, A S; Biswas, N; Bewtra, J K

    2006-09-01

    Experiments were carried out to investigate the ability of water hyacinth (Eichhornia crassipes) to remove five heavy metals (cadmium, chromium, copper, nickel, and lead) commonly found in leachate. All experiments were conducted in batch reactors in a greenhouse. It was found that living biomass of water hyacinth was a good accumulator for copper, chromium, and cadmium. The plants accumulated copper, chromium, and cadmium up to 0.96, 0.83, and 0.50%, respectively, of their dry root mass. However, lead and nickel were poorly accumulated in water hyacinth. Also, nonliving biomass of water hyacinth dry roots showed ability to accumulate all metals, except Cr(VI), which was added in anionic form. The highest total metal sorption by nonliving dry water hyacinth roots was found to take place at pH 6.4. The current research demonstrates the potential of using water hyacinth for the treatment of landfill leachate containing heavy metals.

  1. Recycling of cattle dung, biogas plant-effluent and water hyacinth in vermiculture

    Energy Technology Data Exchange (ETDEWEB)

    Balasubramanian, P.R.; Bai, R.K. [Madurai Kamaraj Univ. (India)

    1995-08-01

    The efficiency of recycling cattle dung, anaerobically digested cattle dung (biogas plant-effluent) and water hyacinth (Eichhornia crassipes) by culture of the earthworm Megascolex sp. was studied. The growth of the earthworms was increased by 156, 148 and 119% in soil supplemented with water hyacinth, cattle dung and biogas plant-effluent, respectively. The growth rate of the earthworms was increased significantly by raw cattle dung and water hyacinth over that by biodigested slurry. (author)

  2. An analysis of the market potential of water hyacinth-based systems for municipal wastewater treatment

    Science.gov (United States)

    Robinson, A. C.; Gorman, H. J.; Hillman, M.; Lawhon, W. T.; Maase, D. L.; Mcclure, T. A.

    1976-01-01

    The potential U.S. market for tertiary municipal wastewater treatment facilities which make use of water hyacinths was investigated. A baseline design was developed which approximates the "typical" or "average" situation under which hyacinth-based systems can be used. The total market size for tertiary treatment was then estimated for those geographical regions in which hyacinths appear to be applicable. Market penetration of the baseline hyacinth system when competing with conventional chemical and physical processing systems was approximated, based primarily on cost differences. A limited analysis was made of the sensitivity of market penetration to individual changes in these assumptions.

  3. Synthesis of Furfural from Water Hyacinth (Eichornia croassipes)

    Science.gov (United States)

    Ismiyarto; Ngadiwiyana; windarti, T.; Purbowatiningrum, RS; Hapsari, M.; Rafi’ah, FH; Suyanti; Haq, MS

    2017-02-01

    Furfural has been prepared from hydrolysis of dried biomass of water hyacinth (Eichornia crassipes) by using diluted hydrochloric acid and sulphuric acid as catalysts. This process involved the conversion of the pentosane fraction in water hyacinth into pentose, and then pentose was cyclodehydrated into furfural. The reaction was conducted in a distillation set with receiving the flask that contains chloroform. Furfural was identified by fehling test which was then characterized using Fourier Transform Infra Red (FTIR) and Proton Nuclear Magnetic Resonance (1H-NMR), followed by Gas Chromatography with Mass Spectroscopy (GC-MS). The yield of furfural obtained using sulphuric acid catalyst was 0.38% and hydrochloric acid catalyst was 0.01% of dried biomass.

  4. Studies on biomethanation of water hyacinth (eichhornia crassipes) using biocatalyst

    Energy Technology Data Exchange (ETDEWEB)

    Sarkar, Santanu [Department of Chemical Engineering, Jadavpur University, Kolkata-700032 (India); Banerjee, Saikat [Department of Chemical Engineering, Salalah College of Technology, Salalah (Oman)

    2013-07-01

    Water hyacinth is a huge source of biomass in tropical countries. That can be used for biogas production. The aim of this conversion process is to improve the quality, specific energy content, transportability, etc. of the raw biomass source or to capture gases which are naturally produced as biomass is micro biologically degraded. An experimental study on catalytic biomethanation of Water Hyacinth has been carried out in a semi batch digester at different substrate concentration using cow urine as an organic catalyst under controlled pH with in the range of 6.9 to 7.2. The rate of bio gas production varies with different conditions and parameters like temperature, stirring speed, feed concentration, catalyst concentration, etc. It has been found that the catalyst mainly increases the production rate of biogas from water hyacinth. Mathematical analysis of the experimental data on catalytic biomethanation has been done in the present study. Mathematical equations relating maximum specific growth rate and kinetic parameter at different substrate and catalyst concentration have been developed.

  5. Optimized drying parameters of water hyacinths (Eichhornia crassipes. L

    Directory of Open Access Journals (Sweden)

    Edgardo V. Casas

    2012-12-01

    Full Text Available The study investigated the optimum drying conditions of water hyacinth to contribute in the improvement of present drying processes. The effects of independent parameters (drying temperature, airflow rate, and number of passes on the responses were determined using the Response Surface Methodology. The response parameters were composed of (1 final moisture content, (2 moisture ratio, (3 drying rate,(4 tensile strength, and (5 browning index. Box and Behnken experimental design represented the design of experiments that resulted in 15 drying runs. Statistical analysis evaluated the treatment effects. Drying temperature significantly affected the drying rate, moisture ratio, and browning index. Airflow rate had a significant effect only on the drying rate, while the number of passes significantly affected both the drying rate and browning index. The optimized conditions for drying the water hyacinth were at drying temperature of 90C, airflow rate of 0.044m3/s, and number of passes equivalent to five. The best modelthat characterizes the drying of water hyacinth is a rational function expressed as:

  6. Adsorption of Eu(III) onto roots of water hyacinth

    Energy Technology Data Exchange (ETDEWEB)

    Kelley, C.; Mielke, R.E.; Dimaquibo, D.; Curtis, A.J. [Northern Arizona Univ., Flagstaff, AZ (United States). Dept. of Chemistry; Dewitt, J.G. [San Francisco State Univ., San Francisco, CA (United States)

    1999-05-01

    The water hyacinth (Eichhornia crassipes) has drawn attention as a plant capable of removing pollutants, including toxic metals, from water. The authors are interested in the capacity of the water hyacinth to remediate aquatic environments that have been contaminated with the lanthanide metal, europium Eu(III). Using scanning electron microscopy (SEM) they have been able to determine that Eu(III) is adsorbed onto the surface of the roots from water and that the highest concentration of Eu(III) is on the root hairs. X-ray absorption spectroscopy (XAS) techniques were used to speciate the Eu(III) adsorbed onto the surface of the roots. The XAS data for Eu-contaminated water hyacinth roots provides evidence of a Eu-oxygen environment and establishes that Eu(III) is coordinated to 10--11 oxygen atoms at a distance of 2.44 {angstrom}. This likely involves binding of Eu(III) to the root via carboxylate groups and hydration of Eu(III) at the root surface.

  7. Studies on biomethanation of water hyacinth (eichhornia crassipes using biocatalyst

    Directory of Open Access Journals (Sweden)

    Santanu Sarkar, Saikat Banerjee

    2013-01-01

    Full Text Available Water hyacinth is a huge source of biomass in tropical countries. That can be used for biogas production. The aim of this conversion process is to improve the quality, specific energy content, transportability, etc. of the raw biomass source or to capture gases which are naturally produced as biomass is micro biologically degraded. An experimental study on catalytic biomethanation of Water Hyacinth has been carried out in a semi batch digester at different substrate concentration using cow urine as an organic catalyst under controlled pH with in the range of 6.9 to 7.2. The rate of bio gas production varies with different conditions and parameters like temperature, stirring speed, feed concentration, catalyst concentration, etc. It has been found that the catalyst mainly increases the production rate of biogas from water hyacinth. Mathematical analysis of the experimental data on catalytic biomethanation has been done in the present study. Mathematical equations relating maximum specific growth rate and kinetic parameter at different substrate and catalyst concentration have been developed.

  8. Phenotype and seed production among hyacinth bean (Lablab purpureus L. Sweet) accessions rescued using hydroponic techniques

    Science.gov (United States)

    Hyacinth bean, Lablab purpureus L. (Sweet) is a legume used as a vegetable, forage, and in home gardens as an ornamental plant. Many accessions do not flower during their juvenile period in Byron, GA. Other hyacinth bean accessions produce few seed when regenerated in the field. This study was condu...

  9. Water Hyacinth in the Rift Valley Water Bodies of Ethiopia: Its Distribution, Socioeconomic Importance and Management

    NARCIS (Netherlands)

    Firehun, Y.; Struik, P.C.; Lantinga, E.A.; Taye, T.

    2014-01-01

    A survey was conducted in the Rift Valley water bodies of Ethiopia from 2009 to 2011 to (i) determine the prevalence, agro-ecological distribution and sources of infestation of water hyacinth, (ii) investigate the socio-economic impact of water hyacinth, and (iii) assess changes in its agro-ecologic

  10. 1019-IJBCS-Article-Theophile Lasm

    African Journals Online (AJOL)

    DR GATSING

    étude montrent que les eaux souterraines de San-Pedro sont caractérisées par une faible minéralisation. Elles se ... des partenaires Européens, ii) projet FDPCC. (Fonds de .... prélevés à la fin de la saison des pluies, dans. 45 forages de la ...

  11. A Tribute to Professor Rene H. Miller - A Pioneer in Aeromechanics and Rotary Wing Flight Transportation

    Science.gov (United States)

    Friedmann, Peretz P.; Johnson, Wayne; Scully, Michael P.

    2011-01-01

    Rene H. Miller (May 19, 1916 January 28, 2003), Emeritus H. N. Slater Professor of Flight Transportation, was one of the most influential pioneers in rotary wing aeromechanics as well as a visionary whose dream was the development of a tilt-rotor based short haul air transportation system. This paper pays a long overdue tribute to his memory and to his extraordinary contributions.

  12. Individual Meaning and Increasing Complexity: Contributions of Sigmund Freud and Rene Spitz to Developmental Psychology.

    Science.gov (United States)

    Emde, Robert N.

    1992-01-01

    Considers contributions of Sigmund Freud and Rene Spitz to developmental psychology. Freud's contributions include his observations about play, perspectives on developmental processes, and ideas about unconscious mental activity. Spitz's contributions include his assessments of infants, perspectives on developmental processes, and his concept of…

  13. Individual Meaning and Increasing Complexity: Contributions of Sigmund Freud and Rene Spitz to Developmental Psychology.

    Science.gov (United States)

    Emde, Robert N.

    1992-01-01

    Considers contributions of Sigmund Freud and Rene Spitz to developmental psychology. Freud's contributions include his observations about play, perspectives on developmental processes, and ideas about unconscious mental activity. Spitz's contributions include his assessments of infants, perspectives on developmental processes, and his concept of…

  14. Facilitation and competition among invasive plants: a field experiment with alligatorweed and water hyacinth.

    Science.gov (United States)

    Wundrow, Emily J; Carrillo, Juli; Gabler, Christopher A; Horn, Katherine C; Siemann, Evan

    2012-01-01

    Ecosystems that are heavily invaded by an exotic species often contain abundant populations of other invasive species. This may reflect shared responses to a common factor, but may also reflect positive interactions among these exotic species. Armand Bayou (Pasadena, TX) is one such ecosystem where multiple species of invasive aquatic plants are common. We used this system to investigate whether presence of one exotic species made subsequent invasions by other exotic species more likely, less likely, or if it had no effect. We performed an experiment in which we selectively removed exotic rooted and/or floating aquatic plant species and tracked subsequent colonization and growth of native and invasive species. This allowed us to quantify how presence or absence of one plant functional group influenced the likelihood of successful invasion by members of the other functional group. We found that presence of alligatorweed (rooted plant) decreased establishment of new water hyacinth (free-floating plant) patches but increased growth of hyacinth in established patches, with an overall net positive effect on success of water hyacinth. Water hyacinth presence had no effect on establishment of alligatorweed but decreased growth of existing alligatorweed patches, with an overall net negative effect on success of alligatorweed. Moreover, observational data showed positive correlations between hyacinth and alligatorweed with hyacinth, on average, more abundant. The negative effect of hyacinth on alligatorweed growth implies competition, not strong mutual facilitation (invasional meltdown), is occurring in this system. Removal of hyacinth may increase alligatorweed invasion through release from competition. However, removal of alligatorweed may have more complex effects on hyacinth patch dynamics because there were strong opposing effects on establishment versus growth. The mix of positive and negative interactions between floating and rooted aquatic plants may influence local

  15. Valorisation of a water hyacinth in vermicomposting using an epigeic earthworm Perionyx excavatus in Central Vietnam

    Directory of Open Access Journals (Sweden)

    Zirbes, L.

    2011-01-01

    Full Text Available The feasibility of vermicomposting water hyacinth (WH [Eichhornia crassipes (Mart. Solms] mixed with pig manure (PM in different proportions was tested using tropical composting earthworm Perionyx excavatus. Earthworms grew and reproduced normally until the incorporation of 50% WH in initial substrate. Higher water hyacinth proportions induced earthworms' mortality and significantly affected the numbers of hatchlings and cocoons produced during vermicomposting period. The influence of the application of compost/vermicompost obtained from water hyacinth mixed with pig manure was also studied on seeds germination. Only water hyacinth substrate with 25% WH + 75% PM enhanced seeds germination for Oryza sp. and Nasturtium officinale. At the end of experiments, a significant decrease was observed in organic carbon content for each tested substrates (S1 to S8, in total nitrogen (N for substrates containing 70% to 100% of water hyacinth (S5 to S3 and compost substrates (S1 and S2. An important decrease was also noted in total potassium for all vermicompost substrates (S3 to S8, in total magnesium for composted substrates (S1 and S2, and in C/N ratio for substrates containing 0% to 50% of water hyacinth (S8 to S6. Whereas total N in vermicompost containing 0% to 50% of water hyacinth (S8 to S6, total phosphorus, total potassium in composted substrates (S1 and S2, total magnesium in vermicompost substrates (S3 to S8 and C:N ratio in substrates containing 70% to 100% of water hyacinth (S5 to S3 expressed a significant increase after eight weeks. The result suggested that water hyacinth could be potentially useful as raw material in vermicomposting and biofertilizing if mixed with 75% of pig manure.

  16. Facilitation and competition among invasive plants: a field experiment with alligatorweed and water hyacinth.

    Directory of Open Access Journals (Sweden)

    Emily J Wundrow

    Full Text Available Ecosystems that are heavily invaded by an exotic species often contain abundant populations of other invasive species. This may reflect shared responses to a common factor, but may also reflect positive interactions among these exotic species. Armand Bayou (Pasadena, TX is one such ecosystem where multiple species of invasive aquatic plants are common. We used this system to investigate whether presence of one exotic species made subsequent invasions by other exotic species more likely, less likely, or if it had no effect. We performed an experiment in which we selectively removed exotic rooted and/or floating aquatic plant species and tracked subsequent colonization and growth of native and invasive species. This allowed us to quantify how presence or absence of one plant functional group influenced the likelihood of successful invasion by members of the other functional group. We found that presence of alligatorweed (rooted plant decreased establishment of new water hyacinth (free-floating plant patches but increased growth of hyacinth in established patches, with an overall net positive effect on success of water hyacinth. Water hyacinth presence had no effect on establishment of alligatorweed but decreased growth of existing alligatorweed patches, with an overall net negative effect on success of alligatorweed. Moreover, observational data showed positive correlations between hyacinth and alligatorweed with hyacinth, on average, more abundant. The negative effect of hyacinth on alligatorweed growth implies competition, not strong mutual facilitation (invasional meltdown, is occurring in this system. Removal of hyacinth may increase alligatorweed invasion through release from competition. However, removal of alligatorweed may have more complex effects on hyacinth patch dynamics because there were strong opposing effects on establishment versus growth. The mix of positive and negative interactions between floating and rooted aquatic plants may

  17. Performance of a water hyacinth (Eichhornia crassipes)system in the treatment of wastewater from a duck farm and the effects of using water hyacinth as duck feed

    Institute of Scientific and Technical Information of China (English)

    LU Jianbo; FU Zhihui; YIN Zhaozheng

    2008-01-01

    Nowadays, intensive breeding of poultry and livestock of large scale has made the treatment of its waste and wastewater an urgent environmental issue. which motivated this study. A wetland of 688 m2 was constructed on an egg duck farm, and water hyacinth (Eichhornia crassipes)was chosen as an aquatic plant for the wetland and used as food for duck production. The objectives of this study were to test the role of water hyacinth in purifying nutrient-rich wastewater and its effects on the ducks' feed intake, egg laying performance and egg quality. This paper shows that the constructed wetland removed as much as 64. 44%of chemical oxygen demand (COD), 21. 78%of total nitrogen(TN)and 23. 02%of total phosphorus(TP). Both dissolved oxygen(DO)and the transparency of the wastewater were remarkably improved, with its transparency 2. 5 times higher than that of the untreated wastewater. After the ducks were fed with water hyacinth, the average daily feed intake and the egg-laying ratio in the test group were 5. 86%and 9. 79%higher, respectively, than in the control group; the differences were both significant at the0. 01 probability level. The egg weight in the test group Was 2. 36%higher than in the control group(P<0. 05), but the feed conversion ratios Were almost the same. The eggshell thickness and strength Were among the egg qualities significantly increased in ducks fed with water hyacinth. We concluded that a water hyacinth system was effective for purifying wastewater from an intensive duck farm during the water hyacinth growing season, as harvested water hyacinth had an excellent performance as duck feed. We also discussed the limitations of the experiment.

  18. Cytogenetic effects of cadmium accumulation on water hyacinth (Eichhornia crassipes)

    Energy Technology Data Exchange (ETDEWEB)

    Rosas, I.; Carbajal, M.E.; Gomez-Arroyo, S.; Belmont, R.; Villalobos-Pietrini, R.

    1984-04-01

    Cadmium was bioassayed to observe cytogenetic effects in the water hyacinth (Eichhornia crassipes). Plants were exposed for 96 hr to freshwater containing 0.01, 0.05, 0.10, 1, 5, and 10 mg/liter of cadmium. Metal concentrations in tissues were determined by atomic absorption spectrophotometry. The highest level was found in roots, thus root-tip cells were used for cytogenetic studies; after 24 hr of exposure, micronuclei, c-mitotic effects, and pycnosis were detected and after 48 hr polyploidy was observed. A linear relationship between frequencies of micronuclei and cadmium concentrations was found; at 1, 5, and 10 mg/liter micronuclei numbers were always the lowest. The inhibition of cell proliferation, shown by the low mitotic index, was proportional to the concentration and time of exposure. From the results presented in this paper it may be concluded that water hyacinth is a good sensor, due to its fast rate of metal accumulation, which allows an easy way to determine the presence of potential mutagenic compounds in water. 63 references.

  19. Uptake of Cadmium and Zinc from Synthetic Effluent by Water Hyacinth (Eichhornia crassipes

    Directory of Open Access Journals (Sweden)

    Hafidzatul Husna Mohamad

    2010-01-01

    Full Text Available In this study was conducted on aquatic plant; water hyacinth (Eichchornia crassipes which has been successfully utilized for the removal of cadmium (Cd and zinc (Zn from aqueous solutions. The overall metal uptake by the plant was dependent upon the concentration of the metal and the duration of exposure. In general, the metal content in plants increased with the increase in metal concentrations in solution and the metal accumulation in roots was always significantly higher than that in shoots for both metals in water hyacinth. Water hyacinth treated with 4 mg/L of cadmium accumulated the highest concentration metal in shoots (148 μg/g and roots (2006 μg/g and water hyacinth treated with solution containing 40 mg/L zinc accumulated the highest zinc concentration in shoots (1899 μg/g and roots (9646 μg/g.

  20. Use of biogas fluid-soaked water hyacinth for cultivating Pleurotus geesteranus.

    Science.gov (United States)

    Chen, Xiuxia; Jiang, Zhihe; Chen, Xi; Lei, Jingui; Weng, Boqi; Huang, Qin

    2010-04-01

    Experiments were carried out to test the viability of growing Pleurotus geesteranus on media containing varying amounts of crushed water hyacinth slices, which were soaked in pig farm biogas fluid and dried. The water hyacinth material was utilized to substitute sawdust in the media for mushroom cultivation. Mushroom fruiting bodies harvested were evaluated for yield, amino acid and heavy metal contents. Among the eight treatment groups, the greatest yield and highest amino acid content in the mushrooms were obtained when the proportions of water hyacinth and sawdust in the medium were equal. The concentrations of heavy metals, Hg, Pb and Cd, in most of the present mushroom samples did not exceed the maximum allowed levels according to the limits set forth by the food hygienic and safety regulations for edible mushrooms in China. The proposed waste utilization of water hyacinth could conceivably benefit the environment in various aspects including conservation of forest by reducing the demand on natural woods for mushroom production.

  1. Advances in management and utilization of invasive water hyacinth (Eichhornia crassipes) in aquatic ecosystems - a review.

    Science.gov (United States)

    Yan, Shao-Hua; Song, Wei; Guo, Jun-Yao

    2017-03-01

    The objective of this review is to provide a concise summary of literature in the Chinese language since late 1970s and focuses on recent development in global scenarios. This work will replenish the FAO summary of water hyacinth utilization from 1917 to 1979 and review ecological and socioeconomic impacts of the water hyacinth from 1980 to 2010. This review also discusses the debate on whether the growth of the water hyacinth is a problem, a challenge or an opportunity. Literature suggested that integrated technologies and good management may be an effective solution and the perception of water hyacinth could change from that of a notorious aquatic weed to a valuable resource, including its utilization as a biological agent for the application in bioremediation for removing excess nutrients from eutrophic water bodies at low cost. Key aspects on system integration and innovation may focus on low-cost and efficient equipment and the creation of value-added goods from water hyacinth biomass. In the socioeconomic and ecological domain of global development, all the successful and sustainable management inputs for the water hyacinth must generate some sort of social and economic benefit simultaneously, as well as benefiting the ecosystem. Potential challenges exist in linkages between the management of water hyacinth on the large scale to the sustainable development of agriculture based on recycling nutrients, bio-energy production or silage and feed production. Further research and development may focus on more detailed biology of water hyacinth related with its utilization, cost-benefit analysis of middle to large-scale application of the technologies and innovation of the equipment used for harvesting and dehydrating the plant.

  2. Rice Husk Ash Derived Zeolite Blended with Water Hyacinth Ash for Enhanced Adsorption of Cadmium Ions

    OpenAIRE

    G. W. Mbugua; H. M. Mbuvi; J. W. Muthengia

    2014-01-01

    In order to helpcurtail or imposesustained control to the offensive water hyacinth plant,it is essential to explore ways of generatingwater remediation materials from it. In the current study, the capacity and efficacy of water hyacinth ash (WHA),its insoluble residue (WHAR) and rice husk ash (RHA)to remove cadmium ionsand methylene blue from contaminated water was investigated. Mixtures of the two ashes were used to formulatezeolitic materialsby hydrothermal reactions. Material A, ZMA was pr...

  3. Physical and Combustion Characteristics of Briquettes Made from Water Hyacinth and Phytoplankton Scum as Binder

    Directory of Open Access Journals (Sweden)

    R. M. Davies

    2013-01-01

    Full Text Available The study investigated the potential of water hyacinths and phytoplankton scum, an aquatic weed, as binder for production of fuel briquettes. It also evaluated some physical and combustion characteristics. The water hyacinths were manually harvested, cleaned, sun-dried, and milled to particle sizes distribution ranging from <0.25 to 4.75 mm using hammer mill. The water hyacinth grinds and binder (phytoplankton scum at 10% (B1, 20% (B2, 30% (B3, 40% (B4, and 50% (B5 by weight of each feedstock were fed into a steel cylindrical die of dimension 14.3 cm height and 4.7 cm diameter and compressed by hydraulic press at pressure 20 MPa with dwell time of 45 seconds. Data were analysed using analysis of variance and descriptive statistics. Initial bulk density of uncompressed mixture of water hyacinth and phytoplankton scum at different binder levels varied between 113.86 ± 3.75 (B1 and 156.93 ± 4.82 kg/m3 (B5. Compressed and relaxed densities of water hyacinth briquettes at different binder proportions showed significant difference . Durability of the briquettes improved with increased binder proportion. Phytoplankton scum improved the mechanical handling characteristics of the briquettes. It could be concluded that production of water hyacinth briquettes is feasible, cheaper, and environmentally friendly and that they compete favourably with other agricultural products.

  4. Field, laboratory, and X-ray absorption spectroscopic studies of mercury accumulation by water hyacinths.

    Science.gov (United States)

    Riddle, Sarah G; Tran, Huy H; Dewitt, Jane G; Andrews, Joy C

    2002-05-01

    We have studied water hyacinth (Eichhornia crassipes), a non-native nuisance plant found in the in San Francisco Bay Delta region, for its potential to phytoremediate mercury. Mercury is a common contaminant in San Francisco Bay Area waters because of gold mining activities. In this study, speciation of mercury in hyacinth roots and shoots, rates of mercury uptake by hyacinths in the laboratory, and mercury levels near the Big Break Region in the Delta were studied. In the speciation studies, Hg L3 edge X-ray absorption spectroscopic analysis of Hg model compounds and water hyacinth roots and shoots revealed that Hg was initially bound ionically to oxygen ligands in roots, most likely to carboxylate groups, and was bound covalently to sulfur groups in shoots. In laboratory uptake studies, we found that water hyacinths grown in 1 ppm Hg and one-quarter strength Hoagland's solution accumulated a maximum of 0.20 ppm in shoots and 16.0 ppm in roots, both reaching maximum concentrations after approximately 16 days. Mercury concentrations were found to be 0.26 +/- 0.20 ppm in the water and 0.86 +/- 1.70 ppm in sediment at Big Break. It was proposed that water hyacinths have the potential to phytoremediate mercury in the water at Big Break if the current herbicide treatments are replaced by physical removal.

  5. Experimental Research on the Application of Water Hyacinths to the Ecological Restoration of Water Bodies with Eutrophication

    Institute of Scientific and Technical Information of China (English)

    ZHANG; Fa-kuo; SHAO; Xiao-long; SUN; Yi-chao; LIU; Hong-lei; YUAN; Min; XIE; Hua-sheng; LI; Li; YU; Dan; LIU; Xu

    2012-01-01

    [Objective] The study aims to discuss the application of water hyacinths to the ecological restoration of water bodies with eutrophication through simulation experiments. [Method] In this study, water hyacinths were used to restore the simulated eutrophic water with green algae as the dominant algae species, and then the restoration effect of the simulated eutrophic water by water hyacinths was analyzed. [Result] In the simulation test without sediment, the peak chlorophyll concentration was 434.6 mg/m3 in the tank without water hyacinths, which decreased to 285 and 119 mg/m3 respectively in the tanks with 1 and 4 water hyacinths. In the experiment with sediment, compared with the control tank without water hyacinths, a 58% reduction in chlorophyll concentration could be observed in the tank with 4 water hyacinths planted (with a coverage of 51%). The results showed that water hyacinths could inhibit alga growth notably, but there was likely a density threshold (51% coverage), and no significant eco-restoration effect was observed in the simulated eutrophic water with too few water hyacinths planted. [Conclusion] The research could provide scientific references for the ecological restoration of eutrophic water bodies.

  6. Energy flow of tulips and hyacinths; Energiestroom tulp en hyacint

    Energy Technology Data Exchange (ETDEWEB)

    Wildschut, J. [Praktijkonderzoek Plant en Omgeving PPO, Bloembollen, Boomkwekerij en Fruit, Lisse (Netherlands); Kok, M.; Bisschop, B. [DLV Plant, Wageningen (Netherlands)

    2006-07-15

    The project objectives are: (1) to update and to create an improved map of energy flows for cultivation (natural gas and electricity) and forcing (electricity) of tulips; (2) To update and improve the map of energy flows (natural gas and electricity) for cultivation and forcing of hyacinths; and (3) Deriving the most optimal drying and storage method from an analysis of the distribution in natural gas use/ha in the cultivation of tulips [Dutch] De projectdoelstellingen zijn (1) Het actualiseren en beter in kaart brengen van de energiestromen voor teelt (aardgas en elektriciteit) en broei (elektriciteit) van tulpen; (2) Het actualiseren en beter in kaart brengen van de energiestromen (aardgas en elektriciteit) voor teelt en broei van hyacint; en (3) Het afleiden van de meest optimale droog- en bewaarmethode uit een analyse van de spreiding in aardgasverbruik/ha bij de teelt van tulpen.

  7. Phytoremediation of industrial mines wastewater using water hyacinth.

    Science.gov (United States)

    Saha, Priyanka; Shinde, Omkar; Sarkar, Supriya

    2017-01-02

    The wastewater at Sukinda chromite mines (SCM) area of Orissa (India) showed high levels of toxic hexavalent chromium (Cr VI). Wastewater from chromium-contaminated mines exhibit potential threats for biotic community in the vicinity. The aim of the present investigation is to develop a suitable phytoremediation technology for the effective removal of toxic hexavalent chromium from mines wastewater. A water hyacinth species Eichhornia crassipes was chosen to remediate the problem of Cr (VI) pollution from wastewater. It has been observed that this plant was able to remove 99.5% Cr (VI) of the processed water of SCM in 15 days. This aquatic plant not only removed hexavalent Cr, but is also capable of reducing total dissolved solids (TDS), biological oxygen demand (BOD), chemical oxygen demand (COD), and other elements of water also. Large-scale experiment was also performed using 100 L of water from SCM and the same removal efficiency was achieved.

  8. Assessment of nutritional quality of water hyacinth leaf protein concentrate

    Directory of Open Access Journals (Sweden)

    Oyeyemi Adeyemi

    2016-09-01

    Full Text Available This study was embarked upon to convert water hyacinth, an environmental nuisance, to a natural resource for economic development. Water hyacinth leaf protein concentrate (WHLPC was extracted in edible form and determination of its physicochemical characteristics, total alkaloids and phenolic compounds was done. Analysis of proximate composition and amino acid profile of the WHLPC was also done. The level of heavy metals (mg/kg in WHLPC was found to be Cd (0.02 ± 0.001, Cr (0.13 ± 0.001, Pd (0.003 ± 0.001 and Hg (0.02 ± 0.001 while concentrations of Pb, Pt, Sn, Fe, Cu, Zn, Ni and Co were found to be 0.001 ± 0.00. Level of all heavy metals was found to be within safe limit. Proximate analysis revealed that protein in WHLPC accounted for 50% of its nutrients, carbohydrate accounted for 33% of its nutrients while fat, ash and fibre made up the remaining nutrients. Amino acid analysis showed that WHLPC contained 17 out of 20 common amino acids, particularly, Phe (3.67%, Leu (5.01%. Level of total alkaloids and phenolic compounds was 16.6 mg/kg and 6.0 mg/kg respectively. Evidence from this study suggests that WHLPC is a good source of leaf protein concentrate (LPC; it is nutritious and acutely non toxic.

  9. The effect of microwave power and heating time pretreatment on biogas production from fresh and dried water hyacinth (Eichhornia crassipes)

    Science.gov (United States)

    Sumardiono, Siswo; Budiyono, Mardiani, Dini Tri

    2015-12-01

    The objective of this research was to study the effect of microwave pretreatment of fresh and dried water hyacinth on biogas production. The variations of microwave power levels are 240; 400; 560 and 800 W. The variations of microwave heating time are 5; 7 and 9 min. The unpretreated fresh and dried water hyacinth are used as control. The result of research showed that almost all pretreated water hyacinth produced biogas were higher compare tounpretreated water hyacinth. The maximum of biogas production from fresh and dried water hyacinthwere obtained at 560 W for 7 min and 400 W for 7 min of microwave pretreatment. In this condition, pretreated fresh and dried water hyacinth resulted biogas production of 75,12 and 53,06 mL/g TS, respectively. The unpretreated fresh and dried water hyacinth produced biogas of 37,56 and 33,56 mL/g TS, respectively. The microwave pretreatment of water hyacinth improved biogas production. Microwave pretreatment had a positive impact on anaerobic biodegradability of water hyacinth.

  10. Environmental and economic analysis of application of water hyacinth for eutrophic water treatment coupled with biogas production.

    Science.gov (United States)

    Wang, Zanxin; Calderon, Margaret M

    2012-11-15

    The proliferation of water hyacinth is currently controlled by removing it from a water body and disposing it by landfill in China. Using water hyacinth to remove nutrients from water bodies and to produce biogas is another technically feasible option for the control of water hyacinth, but its environmental and economic performances are not well understood. This study collected data from an experimental biogas plant to develop a lifecycle analysis and a cost benefit analysis for the control of water hyacinth proliferation in a eutrophic lake in China. Comparison was made between the alternative option of using water hyacinth for biogas production and the current practice of disposing it in landfills. The results reveal that the biogas option is economically feasible with a positive energy balance. The removal of water hyacinth to produce biogas can contribute to water quality improvement and GHG emission reduction whose values, however, depend on the processing scale of the biogas plant. Since both the current approach and the biogas option can remove nutrients from water bodies, the additional value of water quality improvement resulting from the biogas option is only possible when the processing scale of the biogas plant is greater than the amount of water hyacinth disposed by landfill. The emission of methane deserves attention when water hyacinth is disposed by landfill. The biogas option can respond to China's policies on water pollution control, renewable energy development, and energy saving and emission reduction.

  11. Experimental and kinetic modelling studies on the acid-catalysed hydrolysis of the water hyacinth plant to levulinic acid

    NARCIS (Netherlands)

    Girisuta, B.; Danon, B.; Manurung, R.; Janssen, L. P. B. M.; Heeres, H. J.

    2008-01-01

    A comprehensive experimental and modelling study on the acid-catalysed hydrolysis of the water hyacinth plant (Eichhornia crassipes) to optimise the yield of levulinic acid (LA) is reported (T = 150-175 degrees C, C-H2SO4 - 0.1-1 M, water hyacinth intake = 1-5 wt%). At high acid concentrations (> 0.

  12. Using composting for control seed germination of invasive plant (water hyacinth) in Extremadura (Spain)

    Science.gov (United States)

    Labrador, Juana; Gordillo, Judit; Ruiz, Trinidad; Albano, Eva; Moreno, Marta M.

    2016-04-01

    The biotransformation of the invasive water hyacinth (Eichhornia crassipes) by composting has been showed as a viable alternative to offset the economic cost of eliminating an invasive plant giving a value to the by-product; however, as result of the propagative plant capacity, it was necessary to check if the composting process could eliminate the germination seed rate. Despite the high temperatures and the biochemical biotransformation processes of the composting components, in the case of seed water hyacinth, with a recovery rate of 100%, damage was observed in some parts of the seed anatomy such as in the outer teguments; however, other parts of the seed coat and the endosperm maintained their integrity. A microscopic analysis revealed that the embryo was noticeable and this was supported by the rate of seed germination observed (3.5 ± 0.96%). The results indicate that the use of water hyacinth for compost production is not completely safe from an environmental perspective. Keywords: Eichhornia crassipes, water hyacinth, invasive plant, seed anatomy, seed germination rate, compost. References: Ruiz T., Martín de Rodrigo E., Lorenzo G., Albano E., Morán R., Sánchez J.M. 2008. The Water Hyacinth, Eichhornia crassipes: an invasive plant in the Guadiana River Basin (Spain). Aquatic Invasions Volume 3, Issue 1:42-53.

  13. Modeling phytoremediation of nitrogen-polluted water using water hyacinth (Eichhornia crassipes)

    Science.gov (United States)

    Mayo, Aloyce W.; Hanai, Emmanuel E.

    2017-08-01

    Water hyacinth (Eichhornia crassipes) has a great potential for purification of wastewater through physical, chemical and biological mechanisms. In an attempt to improve the quality of effluents discharged from waste stabilization ponds at the University of Dar es Salaam, a pilot plant was constructed to experiment the effectiveness of this plants for transformation and removal of nitrogen. Samples of wastewater were collected and examined for water quality parameters, including pH, temperature, dissolved oxygen, and various forms of nitrogen, which were used as input parameters in a kinetic mathematical model. A conceptual model was then developed to model various processes in the system using STELLA 6.0.1 software. The results show that total nitrogen was removed by 63.9%. Denitrification contributed 73.8% of the removed nitrogen. Other dominant nitrogen removal mechanisms are net sedimentation and uptake by water hyacinth, which contributed 16.7% and 9.5% of the removed nitrogen, respectively. The model indicated that in presence of water hyacinth biofilm about 1.26 g Nm-2day-1 of nitrogen was removed. However, in the absence of biofilm in water hyacinth pond, the permanent nitrogen removal was only 0.89 g Nm-2day-1. This suggests that in absence of water hyacinth, the efficiency of nitrogen removal would decrease by 29.4%.

  14. Water hyacinths and alligator weeds for removal of lead and mercury from polluted waters

    Energy Technology Data Exchange (ETDEWEB)

    Wolverton, B.C.; McDonald, R.C.

    1975-04-11

    Removal of lead and mercury by water hyacinths (Eichhornia crassipes) (Mart.) Solms and alligator weeds (Alternanthera philoxeroides) (Mart.) Griesb. was investigated. Water hyacinths demonstrated the ability to remove 0.176 mg of lead and 0.150 mg of mercury per gram of dry plant material from distilled water and river water in a 24-hour period. One acre of water hyacinths is potentially capable of removing 105.6 grams of lead and 90.0 grams of mercury per day. Alligator weeds removed 0.101 mg of lead per gram of dry plant material in a 24-hour period. This same plant also demonstrated the ability to remove a minimum of 0.153 mg of mercury per gram of dry plant material in a six hour period. (STAR)

  15. APPLICATION OF WATER HYACINTH VERMICOMPOST ON THE GROWTH OF Capsicum annum

    Directory of Open Access Journals (Sweden)

    K.BLESSY

    2014-05-01

    Full Text Available The water hyacinth has been developed into biofertilizer by vermicomposting through two methods. Samples have been collected from Kanakkan Yeri, Pondicherry, India. The earthworm chosen for this study was Eudrilus eugeniae. Vermicompost has been prepared using Eudrilus eugeniae. In the present study, two methods were followed. In one method, water hyacinth waste was collected composted by using Eudrilus eugeniae. In the other method, the cellulose present in water hyacinth was hydrolyzed enzymatically and composted by using Eudrilus eugeniae. The vermicompost was collected from both the methods and used for analyzing enzymes, physicochemical parameters, level of macro and micronutrients. The efficacy of the prepared vermicompost has been studied on the vegetable plant Capsicum annum. Germination time, growth of the plant, number of the leaves has been studied. Finally, it has been compared with the plants which were grown using chemical fertilizers (NPK.

  16. Water hyacinths for removal of cadmium and nickel from polluted waters

    Science.gov (United States)

    Wolverton, B. C.

    1975-01-01

    Removal of cadmium and nickel from static water systems utilizing water hyacinths (Eichhornia crassipes (Mart.) Solms) was investigated. This aquatic plant demonstrated the ability to rapidly remove heavy metals from aqueous systems by root absorption and concentration. Water hyacinths demonstrated the ability to absorb and concentrate up to 0.67 mg of cadmium and 0.50 mg of nickel per gram of dry plant material when exposed for a 24-hour period to waters polluted with from 0.578 to 2.00 ppm of these toxic metals. It is found that one hectare of water hyacinths has the potential of removing 300 g of cadmium or nickel from 240,000 liters of water polluted with these metals during a 24-hour period.

  17. Observation of temperature and pH during biogas production from water hyacinth and cow manure

    Directory of Open Access Journals (Sweden)

    Nurfitri Astuti

    2013-11-01

    Full Text Available Biogas is generated from biological process of organic material by bacterial engaged. Biogas can be derived from manure, municipal waste, agricultural waste and other biomass resources. In addition to the use of cow manure as raw material for biogas production, it can also be derived from biomass containing cellulose which one is water hyacinth as an organic material that contains quite large cellulose. The abundance of water hyacinth found in Rawapening causing several negative impacts. The purpose of this study is to observe  temperature and pH on the biogas production generated from water hyacinth of Rawapening and cow manure. Biogas production process begins by chopping the leaves and stems of water hyacinth, and then mixed with cow manure and water. The results of substrate variation of water hyacinth, cow manure and water reaches optimally at 40:80:480 respectively, which produce the highest point of  biogas amounted 176.33 ml on the day 20 in 1L sized digester, the temperature of the biogas production is at 32°C.  At the initial fermentation, digester temperature of 30°C has increased over the course of the fermentation process, a peak at day 20 and then decreased to 27°C at the end of fermentation. There is a decrease in pH starting from initial fermentation at pH 6-7 and then the pH began to decline until the end of fermentation as amount of pH 5.Doi: http://dx.doi.org/10.12777/wastech.1.1.22-25Citation:  Nurfitri Astuti, N., Tri Retnaningsih Soeprobowati, T.R., and  Budiyono. 2013. Observation of temperature and pH during biogas production from water hyacinth and cow manure. Waste Technology 1(1:1-5. Doi: http://dx.doi.org/10.12777/wastech.1.1.22-25

  18. Water hyacinths and alligator weeds for removal of silver, cobalt, and strontium from polluted waters

    Science.gov (United States)

    Wolverton, B. C.; Mcdonald, R. C.

    1975-01-01

    Water hyacinths and alligator weeds demonstrated the ability to rapidly remove heavy metals from an aqueous system by root absorption and concentration. Water hyacinths demonstrated the ability to remove 0.439 mg of silver, 0.568 mg of cobalt, and 0.544 mg of strontium in an ionized form per gram of dry plant material in a 24-hour period. Alligator weeds removed a maximum of 0.439 mg of silver, 0.130 mg of cobalt, and 0.161 mg of strontium per gram of dry plant material per day.

  19. Anatomical studies on water hyacinth (Eichhornia crassipes (Mart.) Solms) under the influence of textile wastewater

    Institute of Scientific and Technical Information of China (English)

    2005-01-01

    Water hyacinth (Eichhornia crassipes (Mart.) Solms) is a prolific free floating aquatic macrohpyte found in tropical and subtropical parts of the earth. The effects of pollutants from textile wastewater on the anatomy of the plant were studied. Water hyacinth exhibits hydrophytic adaptations which include reduced epidermis cells lacking cuticle in most cases, presence of large air spaces (7~50 μm), reduced vascular tissue and absorbing structures. Textile waste significantly affected the size of root cells.The presence of raphide crystals was noted in parenchyma cells of various organs in treated plants.

  20. Remediation of chromium and copper on water hyacinth (E. crassipes shoot powder

    Directory of Open Access Journals (Sweden)

    M. Sarkar

    2017-06-01

    Full Text Available Tannery effluent characterization and removal efficiency of Chromium (Cr and Copper (Cu on water hyacinth has been observed by filtration process. The effluent was contaminated by deep blue color, acidic pH, higher value of total dissolve solid (TDS, electrical conductivity (EC, chemical oxygen demand (COD and lower value of dissolve oxygen (DO. After filtration, the effluent shows that the permissible limit of investigated metals. Adsorbent capacity of water hyacinth shoot powder for Cr and Cu ion was found to be 99.98% and 99.96% for standard solution (SS and 98.83% and 99.59% for tannery effluent (TE, respectively.

  1. Proposed adsorption-diffusion model for characterizing chromium(VI) removal using dried water hyacinth roots

    Energy Technology Data Exchange (ETDEWEB)

    Sarkar, Debasish; Mukherjee, Paramartha; Bandyopadhyay, Amitava [Department of Chemical Engineering, University of Calcutta, Kolkata (India); Das, Sudip Kumar [Department of Chemical Technology, University of Calcutta, Kolkata (India)

    2010-08-15

    Experiments have been carried out to characterize the adsorption of chromium(VI) in the aqueous phase onto dried roots of water hyacinth. Results revealed a very high degree of removal efficiency ({proportional_to}100%). Theoretical analyzes are also made for describing the sorption and diffusion processes. The effective pore diffusivity of chromium(VI) in the water hyacinth roots is determined by a suitable global optimization technique. The depth of penetration, on the other hand, has been estimated for various initial concentrations of chromium(VI). Theoretically predicted concentration profiles are in excellent agreement with the experimental values. (Abstract Copyright [2010], Wiley Periodicals, Inc.)

  2. Study of Biogas Production Rate from Water Hyacinth by Hydrothermal Pretreatment with Buffalo Dung as a Starter

    Directory of Open Access Journals (Sweden)

    Teguh Kurniawan

    2014-08-01

    Full Text Available In this paper we report the effects of hydrothermal pretreatment on biogas enhancement production rates from water hyacinth mixed with buffalo dung. The focus of the experiment was on the time of hydrothermal pretreatment and the ratio of water hyacinth with buffalo dung. The hydrothermal pretreated substrates were characterized by TDS, BOD and pH. The hydrothermal pretreatment of 60 minutes with the ratio of water hyacinth to buffalo dung 1:2 showed the highest biogas production rate at 7889 ml/day. However, the highest methane composition was 52.82% which resulted on the hydrothermal treatment of 30 minutes with equal ratio of water hyacinth and buffalo dung. Thus, the optimum of methane yield obtained at hydrothermal pretreatment for 30 minutes with equal ratio of water hyacinth to buffalo dung is 2856 ml/day. The hydrothermal pretreatment increases the rate production of biogas 102% and the methane yield 51% relative to untreated water hyacinth. The ratio of water hyacinth and buffalo dung has a great impact on biogas production rate and compositions for hydrothermal pretreated substrates.

  3. Rene resultater

    DEFF Research Database (Denmark)

    Christiansen, Ask Vest

    ­manistiske dopingforskning og forskningen om cykelsportens kultur, præ­senteres. Som baggrund for de følgende analyser, indledes anden del med en redegørelse for mo­derne cykelsports struktur og organisation. Tre historiske faser afgrænses, og for hver af disse skildres ud­vik­lingen indenfor holdorganisation og...

  4. Effect of heat treatment on microstructure and mechanical properties of laser melting deposited Ni-base superalloy Rene Prime 41

    Energy Technology Data Exchange (ETDEWEB)

    Li, J. [Laboratory of Laser Materials Processing and Manufacturing, Beihang University (formerly Beijing University of Aeronautics and Astronautics), 37 Xueyuan Road, Beijing 100191 (China); Wang, H.M., E-mail: wanghm@buaa.edu.cn [Laboratory of Laser Materials Processing and Manufacturing, Beihang University (formerly Beijing University of Aeronautics and Astronautics), 37 Xueyuan Road, Beijing 100191 (China); Tang, H.B. [Laboratory of Laser Materials Processing and Manufacturing, Beihang University (formerly Beijing University of Aeronautics and Astronautics), 37 Xueyuan Road, Beijing 100191 (China)

    2012-07-30

    Highlights: Black-Right-Pointing-Pointer Extensive precipitation of {gamma} Prime particles resulted in high hardness and ductility. Black-Right-Pointing-Pointer Alignment and coalescence of {gamma} Prime precipitates induced decrease in strength. Black-Right-Pointing-Pointer Standard heat treatment for wrought Rene Prime 41 alloy is not suitable for the LMD alloy. - Abstract: Ni-base superalloy Rene Prime 41 was produced by the laser melting deposition (LMD) manufacturing process. The LMD material was solution treated at 1065 Degree-Sign C for 4 h followed by air quenching and aged at 760 Degree-Sign C for 16 h followed by air cooling. Microstructure of the as-deposited, solution treated and solution-aged alloys were characterized by scanning electron microscopy and transmission electron microscopy, and the tensile properties and hardness were tested. The solution-aged Rene Prime 41 superalloy showed high hardness, low strength and low ductility. The extensive precipitation of {gamma} Prime resulted in high hardness and ductility, and the subsequent alignment and coalescence of {gamma} Prime precipitates induced low strength. The structure-property relationships of the alloy under three different heat treating conditions were studied and results indicated that the standard heat treatment recommended for wrought Rene Prime 41 was not suitable for LMD alloy and had to be modified to realize optimum mechanical properties.

  5. Water Hyacinths for Upgrading Sewage Lagoons to Meet Advanced Wastewater Treatment Standards, Part 1

    Science.gov (United States)

    Wolverton, B. C.; Mcdonald, R. C.

    1975-01-01

    Water hyacinths, Eichhornia crassipes Mart. Solms, have demonstrated the ability to function as an efficient and inexpensive final filtration system in a secondary domestic sewage lagoon during a three month test period. These plants reduced the suspended solids, biochemical oxygen demanding substances, and other chemical parameters to levels below the standards set by the state pollution control agency. The water hyacinth-covered secondary lagoon utilized in this experiment had a surface area of 0.28 hectare (0.70 acre) with a total capacity of 6.8 million liters (1.5 million gallons), receiving an inflow of 522,100 liters (115,000 gallons) per day from a 1.1 hectare (3.8 acre) aerated primary sewage lagoon. These conditions allowed a retention time of 14 to 21 days depending on the water hyacinth evapotranspiration rates. The desired purity of final sewage effluent can be controlled by the water hyacinth surface area, harvest rate, and the retention time.

  6. Water hyacinths for upgrading sewage lagoons to meet advanced wastewater treatment standards, part 2

    Science.gov (United States)

    Wolverton, B. C.; Mcdonald, R. C.

    1976-01-01

    Field tests using water hyacinths as biological filtration agents were conducted in the Mississippi gulf coast region. The plants were installed in one single cell and one multiple cell sewage lagoon systems. Water hyacinths demonstrated the ability to maintain BOD5 and total suspended solid (TSS) levels within the Environmental Protection Agency's prescribed limits of 30 mg/lBOD5 and 30 mg/l TSS. A multiple cell sewage lagoon system consisting of two aerated and one water hyacinth covered cell connected in series demonstrated the ability to maintain BOD5 and TSS levels below 30 mg/l year-round. A water hyacinth covered lagoon with a surface area of 0.28 hectare containing a total volume of 6.8 million liters demonstrated the capacity to treat 437,000 to 1,893,000 liters of sewage influent from 2.65 hectares of aerated lagoons daily and produce an effluent that met or exceeded standards year-round.

  7. Removal of Crystal Violet dye from aqueous solution using water hyacinth: Equilibrium, kinetics and thermodynamics study

    Directory of Open Access Journals (Sweden)

    M. Rajeswari Kulkarni

    2017-03-01

    Full Text Available Effluent water from dyeing industries has now for long been a taxing issue. Of the various dyes which are extremely toxic, Crystal Violet which is used in the dyeing industry is known for its mutagenic and mitotic poisoning nature. Water hyacinth (Eichhornia crassipes is a perennial aquatic plant notorious for its rapid invasive growth on the surface of water bodies causing ill-effects on the biodiversity. The potential of powdered roots of water hyacinth was studied for decolorization of Crystal Violet dye. Influence of parameters such as initial pH (2.0–10.0, initial dye concentration (100–500 ppm, biosorbent dosage (0.5–5 g/l, contact time (10–240 min and temperature (300–323 K were examined. Maximum removal of dye was observed at pH 7.8. The obtained data were fit into different kinetic models and the biosorption was found to follow pseudo second order kinetic model. The Langmuir monolayer biosorption capacity of water hyacinth was estimated as 322.58 mg/g. The study has demonstrated water hyacinth as a potential low cost biosorbent for effective removal of Crystal Violet dye from aqueous solution.

  8. WATER HYACINTH: A POSSIBLE ALTERNATIVE RATE RETARDING NATURAL POLYMER USED IN SUSTAINED RELEASE TABLET DESIGN

    Directory of Open Access Journals (Sweden)

    Sabera eKhatun

    2014-06-01

    Full Text Available In recent years natural polymers have been widely used, because of their effectiveness and availability over synthetic polymers. In this present investigation matrix tablets of Metformin hydrochloride were formulated using Water hyacinth powder and its rate retardant activity was studied. Tablets were prepared using wet granulation method with 8% starch as granulating agent and 5%, 10%, 15%, 20%, 25% and 30% of Water hyacinth powder to the drug. In preformulation study, angle of repose, Carr’s Index and Hausner ratio were calculated. Fourier Transform Infrared Spectroscopy (FTIR, Differential Scanning Calorimetry (DSC and Scanning Electron Microscopy (SEM studies were performed and no interactions were found between drug and excipients. Weight variation, friability, hardness, thickness, diameter, and in vitro release study were performed with the prepared matrix tablets. Dissolution studies were conducted using USP type II apparatus at a speed of 100 rpm at 37oC ± 0.5 temperature, for 8 hours. All the formulations comply with both BP and USP requirements, but among all the formulations F-1 (5% of Water hyacinth was the best fitted formula. The drug release patterns were explained in different kinetic models such as Zero order, First order, Higuchi, Hixson Crowell and Korsmeyer-Peppas equations. The current investigation implies that Water hyacinth has the potential to be used as a rate-retarding agent in sustained release drug formulations.

  9. Development of toxicity tolerant water hyacinth `(Eichhornea crassipes)` for effective treatment of raw sewage

    Energy Technology Data Exchange (ETDEWEB)

    Ayade, B.B. [Ibadan Univ. (Nigeria). Dept. of Botany and Microbiology

    1998-06-01

    Pioneering research efforts in the handling of municipal sewage in developing countries have involved the use of water hyacinth (Eichhornea crassipes) to purify sewage for possible re-use of the effluent water for domestic purposes. The ability of water hyacinth to remove pollution from raw sewage has been found to be impaired by sewage toxicity. Trials were therefore carried out to adapt water hyacinth to toxicity and thereby increase its ability to remove pollutants from raw sewage. The plants were adapted using an active bio-degrader consisting of Pseudomonas aeruginosa, Escherichia coli, Klebsiella ozaenae, Klebsiella edwardsiella and Baccillus subtilis. The adaption progressed through 20, 40, 60 and 80% sewage dilution until plants capable of growth in 100% raw sewage were obtained. Plants were observed for morphological growth and at four weeks, samples wer collected for tissue analysis. The plants progressively absorbed nutrients from sewage up to the fourth week, when signs of toxicity were observed through wilting, loss of turgidity and reduction in leaf number. However, plants that survived through a series of adaptations under various sewage dilutions exhibited luxuriant growth on raw sewage. In synergy with the active bio-degrader, the efficiency of the adapted water hyacinth to remove pollutants (nutrients) from raw sewage was enhanced by 93%. (orig.)

  10. Phytoremediation of nutrient polluted stormwater runoff: water hyacinth as a model plant

    NARCIS (Netherlands)

    Fox, L.J.

    2009-01-01

    Het doel van het in dit proefschrift beschreven onderzoek was om te verkennen in hoeverre fytoremediatie met behulp van waterplanten kon beheersen en de waterkwaliteit te verbeterenPhytoremediation of nutriënt polluted stormwater runoff using water hyacinth as a model plant was explored in greenhous

  11. The feeding activity of Colossoma macropomum larvae (tambaqui in fishponds with water hyacinth (Eichhornia crassipes fertilizer

    Directory of Open Access Journals (Sweden)

    LH. Sipaúba-Tavares

    Full Text Available Analysis of macrophyte water hyacinth (Eichhornia crassipes as an organic fertilizer of Colossoma macropomum (tambaqui larvae in ponds is provided. Water hyacinth produce an organic fertilizer at the ratio of 100 g.m-2 in tambaqui ponds. Two groups of 5,000 larvae were transferred to two fishponds with and without water hyacinth fertilizer and reared until day 43. The fertilized pond evidenced more plankton abundance during the entire production period when compared with the control pond (P 0.05 in both ponds (with and without organic fertilizer. Fish larvae failed to show any preference or selectivity in relation to the different algae (P > 0.01 in the pond, but exhibited high ingestion selectivity for zooplankton (P < 0.05. Application of fertilizer increased (P < 0.05 the abundance of phytoplankton and zooplankton in the treatment pond. Since water hyacinth fertilizer is quite cheap and easily available, it may be conveniently used to enhance fish yield in ponds.

  12. Bench-Scale Investigation Of Mercury Phytoremediation By Water Hyacinths (Eichhornia crassipes) In Heavily Contaminated Sediments

    Science.gov (United States)

    Phytoremediation has the potential to be implemented at mercury (Hg) and methylmercury (MeHg) contaminated sites. Water hyacinths (Eichhornia crassipes) were investigated for their ability to assimilate Hg and MeHg into plant biomass, in both aquatic and sediment-associat...

  13. Phytoremediation Of Mercury And Methylmercury Contaminated Sediments By Water Hyacinth (Eichhornia crassipes)

    Science.gov (United States)

    Phytoremediation has potential to be implemented at mercury (Hg) and methylmercury (MeHg) contaminated sites. Water hyacinths (Eichhornia crassipes) were investigated for their ability to assimilate Hg and MeHg into plant biomass, in both aquatic and sediment-associated f...

  14. Phytoremediation of Mercury- and Methyl Mercury-Contaminated Sediments by Water Hyacinth (Eichhornia crassipes)

    Science.gov (United States)

    Phytoremediation has the potential for implementation at Hg- (Hg) and methylHg (MeHg)-contaminated sites. Water hyacinths (Eichhornia crassipes) were investigated for their ability to assimilate Hg and MeHg into plant biomass, in both aquatic and sediment-associated forms...

  15. Phytoremediation Of Mercury And Methylmercury Contaminated Sediments By Water Hyacinth (Eichhornia crassipes)

    Science.gov (United States)

    Phytoremediation has potential to be implemented at mercury (Hg) and methylmercury (MeHg) contaminated sites. Water hyacinths (Eichhornia crassipes) were investigated for their ability to assimilate Hg and MeHg into plant biomass, in both aquatic and sediment-associated f...

  16. Bench-Scale Investigation Of Mercury Phytoremediation By Water Hyacinths (Eichhornia crassipes) In Heavily Contaminated Sediments

    Science.gov (United States)

    Phytoremediation has the potential to be implemented at mercury (Hg) and methylmercury (MeHg) contaminated sites. Water hyacinths (Eichhornia crassipes) were investigated for their ability to assimilate Hg and MeHg into plant biomass, in both aquatic and sediment-associat...

  17. Phytoremediation of Mercury- and Methyl Mercury-Contaminated Sediments by Water Hyacinth (Eichhornia crassipes)

    Science.gov (United States)

    Phytoremediation has the potential for implementation at Hg- (Hg) and methylHg (MeHg)-contaminated sites. Water hyacinths (Eichhornia crassipes) were investigated for their ability to assimilate Hg and MeHg into plant biomass, in both aquatic and sediment-associated forms...

  18. Water Hyacinth Eichhornia crassipes (Mart. Solms-Laubach Dynamics and Succession in the Nyanza Gulf of Lake Victoria (East Africa: Implications for Water Quality and Biodiversity Conservation

    Directory of Open Access Journals (Sweden)

    John Gichuki

    2012-01-01

    Full Text Available This study, conducted in Nyanza Gulf of Lake Victoria, assessed ecological succession and dynamic status of water hyacinth. Results show that water hyacinth is the genesis of macrophyte succession. On establishment, water hyacinth mats are first invaded by native emergent macrophytes, Ipomoea aquatica Forsk., and Enydra fluctuans Lour., during early stages of succession. This is followed by hippo grass Vossia cuspidata (Roxb. Griff. in mid- and late stages whose population peaks during climax stages of succession with concomitant decrease in water hyacinth biomass. Hippo grass depends on water hyacinth for buoyancy, anchorage, and nutrients. The study concludes that macrophyte succession alters aquatic biodiversity and that, since water hyacinth infestation and attendant succession are a symptom of broader watershed management and pollution problems, aquatic macrophyte control should include reduction of nutrient loads and implementing multifaceted approach that incorporates biological agents, mechanical/manual control with utilization of harvested weed for cottage industry by local communities.

  19. The physiological and biochemical mechanism of nitrate-nitrogen removal by water hyacinth from agriculture eutrophic wastewater

    Directory of Open Access Journals (Sweden)

    WU Wenwei

    Full Text Available ABSTRACT Large amount of agriculturl wastewater containing high level nitrate-nitrogen (NO3 --N is produced from modern intensive agricultural production management due to the excessive use of chemical fertilizers and livestock scale farming. The hydroponic experiment of water hyacinth was conducted for analyzing the content of NO3 --N, soluble sugar content, N-transported the amino acid content and growth change in water hyacinth to explore its purification ability to remove NO3 --N from agriculture eutrophic wastewater and physiological and biochemical mechanism of this plant to remove NO3 --N. The results showed that the water hyacinth could effectively utilize the NO3 --N from agriculture eutrophic wastewater. Compared with the control, the contents of NO3 -change to NO3 --N in the root, leaf petiole and leaf blade of water hyacinth after treatment in the wastewater for a week was significantly higher than that in the control plants treated with tap water, and also the biomass of water hyacinth increased significantly, indicating that the accumulation of biomass due to the rapid growth of water hyacinth could transfer some amount of NO3 --N.13C-NMR analysis confirmed that water hyacinth would convert the part nitrogen absorbed from agriculture eutrophic wastewater to ammonia nitrogen, which increased the content of aspartic acid and glutamic acid, decreased the content of soluble sugar, sucrose and fructose and the content of N-storaged asparagine and glutamine, lead to enhance the synthesis of plant amino acids and promote the growth of plants. These results indicate that the nitrate in agriculture eutrophic wastewater can be utilized by water hyacinth as nitrogen nutrition, and can promote plant growth by using soluble sugar and amide to synthesis amino acids and protein.

  20. Michele Renee Salzman, Marvina A. Sweeney & William Adler (eds., The Cambridge History of Religions in the Ancient World (2 vols. (New York: Cambridge University Press, 2013

    Directory of Open Access Journals (Sweden)

    Giorgio Baruchello

    2014-03-01

    Full Text Available Review of: Michele Renee Salzman, Marvina A. Sweeney & William Adler (eds., The Cambridge History of Religions in the Ancient World (2 vols. (New York: Cambridge University Press, 2013

  1. Rene Thom: de la teoría de Catástrofes a la Metafísica

    OpenAIRE

    Espinoza, Miguel

    1995-01-01

    La Obra De Rene Thom Es Una De Las Contribuciones Mas Significativa Delpensamiento Frances Actual A La Filosofia. Conocido En El Mundo Matematico,Entre Otras Contribuciones, Por Sus Trabajos Sobre Las Variedadesdiferenciables, El Problema Del Cobordismo, La Teoria De Las Singularidades,Thom Es El Autor De La Teoria De Las Catastrofes (Tc). A Traves De Ella, Hapodido Proponer Ideas Pertinentes Al Conjunto De Ciencias Naturales Y Humanas.Sospechosos De La Pretension Universal De La Teoria Y De ...

  2. Free-living amoebae isolated from water-hyacinth root (Eichhornia crassipes).

    Science.gov (United States)

    Ramirez, Elizabeth; Robles, Esperanza; Martinez, Blanca

    2010-09-01

    Free-living amoebae are widely distributed in aquatic environments and their hygienic, medical and ecological relationships to man are increasingly important. The purpose of this study was to isolate free-living amoebae from water-hyacinth root (Eichhornia crassipes) and the water of an urban lake in Mexico City. Five grams of wet root were seeded on non-nutritive agar with Enterobacter aerogenes (NNE). Water samples were concentrated by centrifugation at 1200g for 15min and the pellet was seeded on NNE. Of the 16 isolated genera, 10 were detected in both habitats. The most frequent were Vannella in root and Acanthamoeba and Naegleria in water. The total number of isolates and genera isolated from root was higher than that isolated from water. The differences between root and water are probably due to the morphological characteristics of water-hyacinth root, which provides a large habitat and refuge area for many organisms.

  3. Oxidation behavior and mechanism of powder metallurgy Rene95 nickel based superalloy between 800 and 1000 deg. C

    Energy Technology Data Exchange (ETDEWEB)

    Zheng Lei, E-mail: zhenglei_ustb@sina.com [School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 10083 (China); Zhang Maicang; Dong Jianxin [School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 10083 (China)

    2010-10-01

    The oxidation behaviors of powder metallurgy (PM) Rene95 Ni-based superalloy in the temperature range of 800-1000 deg. C are investigated in air by virtue of isothermal oxidation testing, X-ray diffraction, scanning electron microscopy and energy dispersive X-ray spectroscopy. The results show that the oxidation kinetics follows a square power law as the time extends at each temperature. The oxidation layers are detected to be composed of Cr{sub 2}O{sub 3}, TiO{sub 2} and a small amount of NiCr{sub 2}O{sub 4}. The cross-sectional morphologies indicate that the oxidation layer consists of three parts: Cr-rich oxide layer, Cr and Ti duplex oxide layer, and oxidation affected zone. Theoretical analyses of oxidation kinetics and thicknesses of oxidation layers confirm that the activation energy of oxidation of PM Rene95 superalloy is 165.32 kJ mol{sup -1} and the oxidation process is controlled by diffusions of oxygen, Cr, and Ti. Accordingly, a diffusion-controlled mechanism is suggested to understand the oxidation behaviors of PM Rene95 superalloy at elevated temperatures.

  4. Phytoremediation of Polychlorobiphenyls PCBs in Landfill E-Waste Leachate with Water Hyacinth E.Crassipes

    OpenAIRE

    E.A Omondi; P.K Ndiba and P.G Njuru

    2015-01-01

    Abstract The presence of e-waste in a landfill can release persistent organic pollutants POPs including polychlorinated biphenyls PCBs into the environment. PCBs are a family of more than 200 chemical compounds congeners each of which consists of two benzene rings and one to ten chlorine atoms. This study investigated use of water hyacinth Eichhornia crassipes for phytoremediation of landfill leachate waste containing PCB. Landfill leachate was simulated in the laboratory by spiking water sam...

  5. Water hyacinth for phytoremediation of radioactive waste simulate contaminated with cesium and cobalt radionuclides

    Energy Technology Data Exchange (ETDEWEB)

    Saleh, H.M., E-mail: hosamsaleh70@yahoo.com [Radioisotope Department, Nuclear Research Center, Atomic Energy Authority, Dokki 12311, Giza (Egypt)

    2012-01-15

    Highlights: Black-Right-Pointing-Pointer Phytoremediation of radioactive wastes containing {sup 137}Cs and {sup 60}Co radionuclides. Black-Right-Pointing-Pointer Using water hyacinth for radioactive waste treatment. Black-Right-Pointing-Pointer Bioaccumulation of radionuclides from radioactive waste streams. Black-Right-Pointing-Pointer Factors affecting bioaccumulation of {sup 137}Cs and {sup 60}Co using floating plants. - Abstract: Phytoremediation is based on the capability of plants to remove hazardous contaminants present in the environment. This study aimed to demonstrate some factors controlling the phytoremediation efficiency of live floating plant, water hyacinth (Eichhornia crassipes), towards the effluents contaminated with {sup 137}Cs and/or {sup 60}Co. Cesium has unknown vital biological role for plant while cobalt is one of the essential trace elements required for plant. The main idea of this work i.e. using undesirable species, water hyacinth, in purification of radiocontaminated aqueous solutions has been receiving much attention. The controlling factors such as radioactivity concentration, pH values, the amount of biomass and the light were studied. The uptake rate of radiocesium from the simulated waste solution is inversely proportional to the initial activity content and directly proportional to the increase in mass of plant and sunlight exposure. A spiked solution of pH Almost-Equal-To 4.9 was found to be the suitable medium for the treatment process. The uptake efficiency of {sup 137}Cs present with {sup 60}Co in mixed solution was higher than if it was present separately. On the contrary, uptake of {sup 60}Co is affected negatively by the presence of {sup 137}Cs in their mixed solution. Sunlight is the most required factor for the plant vitality and radiation resistance. The results of the present study indicated that water hyacinth may be a potential candidate plant of high concentration ratios (CR) for phytoremediation of radionuclides

  6. Pyrolysis of azolla, sargassum tenerrimum and water hyacinth for production of bio-oil.

    Science.gov (United States)

    Biswas, Bijoy; Singh, Rawel; Krishna, Bhavya B; Kumar, Jitendra; Bhaskar, Thallada

    2017-10-01

    Pyrolysis of azolla, sargassum tenerrimum and water hyacinth were carried out in a fixed-bed reactor at different temperatures in the range of 300-450°C in the presence of nitrogen (inert atmosphere). The objective of this study is to understand the effect of compositional changes of various aquatic biomass samples on product distribution and nature of products during slow pyrolysis. The maximum liquid product yield of azolla, sargassum tenerrimum and water hyacinth (38.5, 43.4 and 24.6wt.% respectively) obtained at 400, 450 and 400°C. Detailed analysis of the bio-oil and bio-char was investigated using (1)H NMR, FT-IR, and XRD. The characterization of bio-oil showed a high percentage of aliphatic functional groups and presence of phenolic, ketones and nitrogen-containing group. The characterization results showed that the bio-oil obtained from azolla, sargassum tenerrimum and water hyacinth can be potentially valuable as a fuel and chemicals. Copyright © 2017 Elsevier Ltd. All rights reserved.

  7. REMOVAL OF CHROMIUM FROM AQUEOUS SOLUTION USING LOCALLY AVAILABLE INEXPENSIVE TARO AND WATER HYACINTH AS BIOSORBENT

    Directory of Open Access Journals (Sweden)

    Shahjalal Khandaker

    2016-04-01

    Full Text Available In this investigation, locally available and inexpensive Taro and Water Hyacinth were used as biosorbents to remove chromium from synthetic wastewater. The removal of this metal ion from water in the batch and column method have been studied and discussed. Adsorption kinetics and equilibrium isotherm studies were also carried out. The material exhibits good adsorption capacity and the data follow both Freundlich and Langmuir models. Scanning Electronic Microscopic image was also used to understand the surface characteristics of biosorbent before and after biosorption studies. Effects of various factors such as pH, adsorbent dose, adsorbate initial concentration, particle size etc. were analyzed. The initial concentrations of chromium were considered 5-30mgL-1 in batch method and only 4mgL-1 in column method. The maximum chromium adsorbed was 1.64 mgg-1 and 4.44 mgg-1 in Batch method and 1.15 mgg-1 and 0.75 mgg-1 in Column method. Batch and Column desorption and regeneration studies were conducted. Column desorption studies indicated that both of these biosorbents could be reused for removing heavy metals. Results of the laboratory experiments show that the performance of Taro and Water Hyacinth prove that they can effectively be used as low cost biosorbents for the removal of chromium from wastewater.KEYWORDS:   adsorption; chromium removal; Taro; water hyacinth; batch method; column studies

  8. Lead tolerance of water hyacinth (Eichhornia crassipes Mart. - Pontederiaceae as defined by anatomical and physiological traits

    Directory of Open Access Journals (Sweden)

    FABRICIO J. PEREIRA

    2014-09-01

    Full Text Available This study aimed at verifying the lead tolerance of water hyacinth and at looking at consequent anatomical and physiological modifications. Water hyacinth plants were grown on nutrient solutions with five different lead concentrations: 0.00, 0.50, 1.00, 2.00 and 4.00 mg L–1 by 20 days. Photosynthesis, transpiration, stomatal conductance and the Ci/Ca rate were measured at the end of 15 days of experiment. At the end of the experiment, the anatomical modifications in the roots and leaves, and the activity of antioxidant system enzymes, were evaluated. Photosynthetic and Ci/Ca rates were both increased under all lead treatments. Leaf anatomy did not exhibit any evidence of toxicity effects, but showed modifications of the stomata and in the thickness of the palisade and spongy parenchyma in the presence of lead. Likewise, root anatomy did not exhibit any toxicity effects, but the xylem and phloem exhibited favorable modifications as well as increased apoplastic barriers. All antioxidant system enzymes exhibited increased activity in the leaves, and some modifications in roots, in the presence of lead. It is likely, therefore, that water hyacinth tolerance to lead is related to anatomical and physiological modifications such as increased photosynthesis and enhanced anatomical capacity for CO2 assimilation and water conductance.

  9. [Effects of large-area planting water hyacinth on macro-benthos community structure and biomass].

    Science.gov (United States)

    Liu, Guo-Feng; Liu, Hai-Qin; Zhang, Zhi-Yong; Zhang, Ying-Ying; Yan, Shao-Hua; Zhong, Ji-Cheng; Fan, Cheng-Xin

    2010-12-01

    The effects on macro-benthos and benthos environment of planting 200 hm2 water hyacinth (E. crassipens) in Zhushan Bay, Lake Taihu, were studied during 8-10 months consecutive surveys. Results indicated that average densities of mollusca (the main species were Bellamya aeruginosa) in far-planting, near-planting and planting area were 276.67, 371.11 and 440.00 ind/m2, respectively, and biomass were 373.15, 486.57 and 672.54 g/m2, respectively, showed that average density and biomass of planting area's were higher than those of others. However, the average density and biomass of Oligochaeta (the main species was Limodrilus hoffmeisteri) and Chironomidae in planting area were lower than that of outside planting area. The density and biomass of three dominant species of benthic animal increased quickly during 8-9 months, decreased quickly in October inside and outside water hyacinth planting area. The reason of this phenomenon could be possible that lots of cyanobacteria cells died and consumed dissolve oxygen in proceed decomposing. Algae cells released lots of phosphorus and nitrogen simultaneously, so macro-benthos died in this environment. The indexes of Shannon-Weaver and Simpson indicated that water environment was in moderate polluted state. On the basis of the survey results, the large-area and high-density planting water hyacinth haven't demonstrated a great impact on macrobenthos and benthos environment in short planting time (about 6 months planting time).

  10. Occurrence and diversity of fungal pathogens associated with water hyacinth and their potential as biocontrol agents in the Rift Valley of Ethiopia

    NARCIS (Netherlands)

    Gebregiorgis, Firehun; Struik, P.C.; Lantinga, E.A.; Tessema, Taye

    2017-01-01

    Water hyacinth poses serious socio-economic and environmental problems in Ethiopia. To integrate fungal pathogens into water hyacinth management, a survey was conducted in the Rift Valley of Ethiopia. Based on morphological characterization and DNA sequencing, 25 fungal species were identified th

  11. Phytoremediation of Polychlorobiphenyls PCBs in Landfill E-Waste Leachate with Water Hyacinth E.Crassipes

    Directory of Open Access Journals (Sweden)

    E.A Omondi

    2015-05-01

    Full Text Available Abstract The presence of e-waste in a landfill can release persistent organic pollutants POPs including polychlorinated biphenyls PCBs into the environment. PCBs are a family of more than 200 chemical compounds congeners each of which consists of two benzene rings and one to ten chlorine atoms. This study investigated use of water hyacinth Eichhornia crassipes for phytoremediation of landfill leachate waste containing PCB. Landfill leachate was simulated in the laboratory by spiking water samples with PCB to obtain concentrations of 5 10 and 15 amp956gL which were in one to two orders of magnitude above the US Environmental Protection Agency EPA limit of 0.5 amp956gL or 0.5 ppb. Water hyacinth plants were grown in 2 L samples of the PCB spiked water for 15 days and evaluated for tolerance and bioaccumulation of PCB. Phytoremediation of PCB spiked water by the plants was evaluated by measuring the change in concentration of PCB. The plants tolerated PCB concentrations in the range of 5 to 15 amp956gL without depicting any serious adverse effect except for change in root color and an initial wilting of peripheral leaves. Water hyacinth reduced the concentration of PCBs in the leachate over 15 days from 15 to 0.42 amp956gL for the 15 amp956gL initial concentration sample and to below the GCMS detection limit of 0.142 amp956gL for the 10 and 5 ugL initial concentration samples. Bioaccumulation of PCB in the plant tissue was evaluated through solid phase extraction and testing of samples for PCB with GCMS. Bioaccumulation of PCBs at a concentration of 0.179 amp956gg was observed in the water hyacinth roots for the 15 amp956gL sample but none was detected for the lower initial PCB concentration and shoots. The study demonstrated potential of water hyacinth plants in phytoremediation of PCBs in e-waste leachate.

  12. Cogeneration of H{sub 2} and CH{sub 4} from water hyacinth by two-step anaerobic fermentation

    Energy Technology Data Exchange (ETDEWEB)

    Cheng, Jun; Zhou, Junhu; Song, Wenlu; Cen, Kefa [State Key Laboratory of Clean Energy Utilization, Zhejiang University, Hangzhou 310027 (China); Xie, Binfei [State Key Laboratory of Clean Energy Utilization, Zhejiang University, Hangzhou 310027 (China); Pyneo Company Limited, Hangzhou 310012 (China)

    2010-04-15

    A novel reaction mechanism of H{sub 2} and CH{sub 4} cogeneration from water hyacinth (Eichhornia crassipes) was originally proposed to increase the energy conversion efficiency. The glucose and xylose hydrolysates derived from cellulose and hemicellulose are fermented to cogenerate H{sub 2} and CH{sub 4} by two-step anaerobic fermentation. The total volatile solid of hyacinth leaves can theoretically cogenerate H{sub 2} and CH{sub 4} yields of 303 ml-H{sub 2}/g-TVS and 211 ml-CH{sub 4}/g-TVS, which dramatically increases the theoretical energy conversion efficiency from 19.1% in only H{sub 2} production to 63.1%. When hyacinth leaves are pretreated with 3 wt% NaOH and cellulase in experiments, the cogeneration of H{sub 2} (51.7 ml-H{sub 2}/g-TVS) and CH{sub 4} (143.4 ml-CH{sub 4}/g-TVS) markedly increases the energy conversion efficiency from 3.3% in only H{sub 2} production to 33.2%. Hyacinth leaves, which have the most cellulose and hemicellulose and the least lignin and ash, give the highest H{sub 2} and CH{sub 4} yields, while hyacinth roots, which have the most ash and the least cellulose and hemicellulose, give the lowest H{sub 2} and CH{sub 4} yields. (author)

  13. Effect of nickel ions on anaerobic methane production from water hyacinth.

    Science.gov (United States)

    Cai, Xuan; Hong, Zi-Jian; Dai, Rui-Hua; Liu, Yan; Liu, Xiang

    2012-01-01

    The effect of different concentrations of nickel ions (Ni(2+), 0, 10, 40 and 80 mg/L) on the anaerobic methane production of water hyacinth were investigated. Under these four concentrations, the methane production in 40 d was 2,275, 2,703, 3,210 and 2,481 mL, respectively. This situation illustrated that the Ni(2+) promoted the growth of hydrogen-producing acetic acid bacteria and methanogenic bacteria, even at high concentrations (i.e. 40-80 mg/L). The highest methane production per unit weight water hyacinth reached 206 mL/gTS with 40 mg/L Ni(2+). Meanwhile, the modified Gompertz and Logistic equations were applied to describe the effect on anaerobic culture of Ni(2+). According to these models, the values of methane production potential (mL) for four concentrations were in the following order: 40 mg/L (3,123.42 ± 60.08) > 10 mg/L (2,541.16 ± 46.94) > 80 mg/L (2,432.36 ± 40.18) > 0 mg/L (2,238.10 ± 31.90). According to the analysis of the digestate, the residual concentration of Ni(2+) was approximately 1.05-4.9 mg/L, which was relatively low compared with the Ni(2+) concentrations in the raw feedstock. The results would provide academic guidance and technical support for treatment of water hyacinth with an accumulation of heavy metals.

  14. Generating electricity during peak hours in Asuncion, Paraguay, through anaerobic digestion of cultivated water hyacinths

    Directory of Open Access Journals (Sweden)

    A. Maioli

    2012-12-01

    Full Text Available The objective of the present paper is to present an innovative and sustainable proposal for generating electricity in the metropolitan area of Asuncion, the capital of Paraguay, based on a renewable source of energy. Electricity would mainly be generated during peak hours with the aim of reducing power contracted by the Paraguayan Electricity Administration (ANDE from existing hydroelectric power plants and thus reduce costs and stabilise transmission and distribution grids in the area of Asuncion. Electricity would be generated at a 130 MW combined cycle thermal power plant using biogas as fuel, this being obtained by anaerobic digestion of water hyacinths cultivated in pools, which would be built on the banks of the Paraguay river opposite Asuncion’s botanical garden. The main advantage of using water hyacinths is their high growth rate, this being 100 to 500 g/day/m2 depending on environmental conditions, thereby allowing plant mass to double every 6 to 15 days. Additionally, carbon to nitrogen ratio in water hyacinth vegetal mass is optimum for biogas generation. About 6.4 kWh/m3 biogas calorific value is high enough to be used for producing heat and, therefore, for generating electricity in a thermal power plant. Such power plant could be directly connected to the national grid through the Puerto Botanic transformer station by building a 2 km long 220 kV transmission line crossing the Paraguay River. This project could save ANDE up to 25 million US$ every year due to reduced contracted power at the Itaipu power plant. Although this reduction will decline by 3% each year due to increased electricity demand, the investment of around 98 million US$ could be repaid within 15 years and would have 5% IRR and US$ 40.5 million NPV.

  15. [Impacts of algal blooms accumulation on physiological ecology of water hyacinth].

    Science.gov (United States)

    Wu, Ting-ting; Liu, Guo-feng; Han, Shi-qun; Zhou, Qing; Tang, Wan-ying

    2015-01-01

    Blue-green algae bloom will consume plenty of dissolved oxygen in water, which affects the growth of aquatic plants. The effects of water hyacinth growth and physiological response changes under 25 degrees C, 5 different concentrations of cyanobacteria gathered were studied and which would provide a theoretical basis to mitigate adverse impacts and improve water purification effect. The results showed that water quality indexes including dissolved oxygen (DO), pH dropped in algae density below 60 g x L(-1), with the increase of algae density. And the level of oxidation-reduction potential dropped to about 100 mV. The removal rates of TN, TP and COD were 58%-78%, 43%-68% and 59%-73%, leaf soluble protein, soluble sugar, MDA contents increased, respectively; and the MDA content became higher with the increase of algae density. It indicated that the water hyacinth could adapt to the adversity condition as algae density less than 60 g x L(-1). While algae density above 60 g x L(-1), water quality indexes significantly decreased, respectively and the water was in hypoxia or anoxia conditions. Plant leaves soluble sugar contents had a change trend of low-high-low. It indicated that the removal rates of TN, TP decreased with the increase of algae density and water hyacinth had irreversible stress. Plant root length, total length, fresh weight in different treatments, increased compared with the beginning of the experiment, the increase of root length, total length and fresh weight were 0.29-2.44 times, 0.41-0.76 times and 0.9-1.43 times. The increase of root length, total length decreased with the increase of algae density. According to the results, the cyanobacteria should avoid of excessive accumulation as using the floating plant to purify the water.

  16. John Hyacinth de Magellan (1722-90): 18th century physicist with views on medical matters.

    Science.gov (United States)

    Fernandes-Thomaz, Manuel

    2009-02-01

    John Hyacinth de Magellan, whose Portuguese name was João Hyacintho de Magalhaens, though not a doctor nevertheless had many contacts with doctors and showed a genuine interest in disseminating medical news to his many friends and correspondents in Europe. The abundant and less formal correspondence with his friend Ribeiro Sanches forms the greater part of the work but in letters to other correspondents, including Trudaine de Montigny, Condorcet, Volta, J A Euler, Fabroni and Johann III Bernoulli, we find comments on medical subjects. The Sanches letters are particularly interesting because they are private, friend-to-friend letters that convey spontaneous and sincere thoughts and feelings.

  17. Competing fatigue mechanisms in Nickel-base superalloy Rene 88DT

    Science.gov (United States)

    Chang, Paul N.

    Nickel base superalloys exhibit superior high temperature mechanical properties required for aircraft engine components. It has been known that the processing of these alloys by the powder metallurgy route introduces inclusions inside the material. The presence of such inclusions often leads to competing failure modes in fatigue that is described by a step-wise or two distinct S-N curves involving both the surface and internally-initiated cracks, resulting in large uncertainties of fatigue life. A clear understanding of such behavior is yet to be established. The principal objective of this research is to examine the effect of inclusions on the extent of fatigue failure competition from surface and internal initiators at two different specimen test volumes. Experimental fatigue testing has been performed to explore how the presence of inclusions affects the competing fatigue failure modes. In addition, how the competing failure modes will behave with changes in the specimen size was also studied. Two groups of material each with two different specimen sizes were used in this study. It has been shown that the two crack initiation mechanisms occurred in the small unseeded Rene 88DT specimens tested at 650ºC over the stress range tested. Additionally, the fatigue lives were reduced with increase in specimen volume. All fatigue failures in seeded material occurred due to crack initiations from the seeded inclusions. In the fatigue life of seeded material, two competing and separate S-N curves were found in small test volume, whereas, in the large test volume, the regions were separated by a "step" in S-N curve. It has been found that the largest inclusion size observed in metallographic surfaces was smaller than the size determined from the fatigue failure origin. An analysis method based on extreme value statistics developed by Murakami was used to predict the largest size of inclusion in the test volume. The results of this study clearly show that competition for

  18. SEM in-situ investigation on fatigue cracking behavior of P/M Rene95 alloy with surface inclusions

    Institute of Scientific and Technical Information of China (English)

    2006-01-01

    The low-cycle fatigue behavior of powder metallurgy Rene95 alloy containing surface inclusions was investigated by in-situ observation with scanning electron microscopy (SEM). The process of fatigue crack initiation and early stage of propagation behavior indicates that fatigue crack mainly occurs at the interface between the inclusion and the matrix. The effect of inclusion on the fatigue crack initiation and the early stage of crack growth was very obvious. The fatigue crack growth path in the matrix is similar to the shape of inclusion made on the basis of fatigue fracture image analysis. The empiric relation between the surface and inside crack growth length, near a surface inclusion, can be expressed. Therefore, the fatigue crack growth rate or life of P/M Rene95 alloy including the inclusions can be evaluated on the basis of the measurable surface crack length parameter. In addition, the effect of two inclusions on the fatigue crack initiation behavior was investigated by the in-situ observation with SEM.

  19. Perspectives of phytoremediation using water hyacinth for removal of heavy metals, organic and inorganic pollutants in wastewater.

    Science.gov (United States)

    Rezania, Shahabaldin; Ponraj, Mohanadoss; Talaiekhozani, Amirreza; Mohamad, Shaza Eva; Md Din, Mohd Fadhil; Taib, Shazwin Mat; Sabbagh, Farzaneh; Sairan, Fadzlin Md

    2015-11-01

    The development of eco-friendly and efficient technologies for treating wastewater is one of the attractive research area. Phytoremediation is considered to be a possible method for the removal of pollutants present in wastewater and recognized as a better green remediation technology. Nowadays the focus is to look for a sustainable approach in developing wastewater treatment capability. Water hyacinth is one of the ancient technology that has been still used in the modern era. Although, many papers in relation to wastewater treatment using water hyacinth have been published, recently removal of organic, inorganic and heavy metal have not been reviewed extensively. The main objective of this paper is to review the possibility of using water hyacinth for the removal of pollutants present in different types of wastewater. Water hyacinth is although reported to be as one of the most problematic plants worldwide due to its uncontrollable growth in water bodies but its quest for nutrient absorption has provided way for its usage in phytoremediation, along with the combination of herbicidal control, integratated biological control and watershed management controlling nutrient supply to control its growth. Moreover as a part of solving wastewater treatment problems in urban or industrial areas using this plant, a large number of useful byproducts can be developed like animal and fish feed, power plant energy (briquette), ethanol, biogas, composting and fiber board making. In focus to the future aspects of phytoremediation, the utilization of invasive plants in pollution abatement phytotechnologies can certainly assist for their sustainable management in treating waste water.

  20. Re-use of invasive plants (water hyacinth) as organic fertilizer through composting and vermicomposting (Extremadura, Spain)

    Science.gov (United States)

    Labrador, Juana; Gordillo, Judit; Ruiz, Trinidad; Moreno, Marta M.

    2015-04-01

    The water hyacinth (Eichhornia crassipes) is an invasive plant that is native of the Amazon basin and whose capacity for growth and propagation causes major conservation problems with considerable socioeconomic repercussions. The greatest damage due to its fast expansion has been in the middle reaches of the River Guadiana in the SW Iberian Peninsula, where was detected in the Autumn of 2004. Due to its rapid expansion, mechanical extraction was carried out by the Confederación Hidrográfica del Guadiana (CHG) of Spain's Ministry of the Environment since the affected zone is an important area of irrigation farming and hydraulic works and this alien plant weed provoked acute social alarm (Ruiz et al., 2008). In this work we used composting and vermicomposting techniques as an environmental alternative to assess the possibilities of biotransformation of the water hyacinth biomass removed mechanically from the Guadiana River Basin (Spain). Four compost piles 1.5 x 10 m size, mechanically tumbled and with no forced ventilation (turning windrows system), were constructed outdoor. Each compost pile was considered as a different treatment: CC1: fresh water hyacinth / wheat straw (1:1 vol/vol); CC2: fresh water hyacinth / sheep manure rich in wheat straw (1:1 vol/vol); CC3: fresh water hyacinth / sheep manure rich in wheat straw (2:1 vol/vol) + Bokachi EM Activator (200 g m-2) to favor the composting process; CC4: fresh water hyacinth / sheep manure rich in wheat straw (1:1 vol/vol) + Bokachi EM Activator (200 g m-2). The vermicomposting process was performed on mesh coated wooden boxes (0.34 m3) covered with a shadow mesh with the aim of harmonizing the environmental conditions. The quantities of water hyacinth biomass used were identical in volume (120 l) but with different state or composition: fresh and chopped biomass (VCF); dry and chopped biomass (VCS); fresh and pre-composted biomass with sheep manure rich in wheat straw (VCP). Identical worm density, irrigation

  1. THE STUDY OF CADMIUM UPTAKE BY WATER HYACINTH (EICHHORNIA CRASSIPES USING A NATURAL MODELLING APPROACH

    Directory of Open Access Journals (Sweden)

    Tamara E. Romanova

    2012-06-01

    Full Text Available The results of the investigation on the accumulation of cadmium by water hyacinth, depending on the conditions of pollutant exposure and the presence of various additives are discussed. The main specialty of this study is that all the experiments were carried out in natural conditions using the approach based on the application of the capacities called minicosms. It allowed estimating hit consequences of pollutant on ecosystem most really having made experiment in the conditions as much as possible close to the natural. In this article a very important problem of an accuracy and reliability of the results of trace elements determination in plants is also debated. As a result of carried investigations it was shown that the degree of cadmium extraction by hyacinth from contaminated natural water while maintaining the viability of the plants depends on the way of pollutant introducing into the reservoir and the maximum (about 79% value is observed in the case of it’s gradual entry.

  2. Stability of cemented dried water hyacinth used for biosorption of radionuclides under various circumstances

    Science.gov (United States)

    Saleh, H. M.

    2014-03-01

    This paper investigates the influence of frost attack and flooding conditions during disposal on the compressive strength, porosity and durability of cemented waste form contained dried and grinded water hyacinth. This plant was used as a phytoremediating agent to treat liquid waste simulate contaminated with radionuclides. The obtained results showed that an increase in the incorporated dry plants decreases the compressive strength and increases the porosity of the solidified waste form. Raising the number of freeze-thaw cycles was accompanied with noticeable increase in the mass-loss of tested specimens and unsteady trend of compressive strength and consequently the mechanical integrity. The presence and increase of immersion duration per turned positively the mass change and affect in different ways on the solidified waste form. Spectroscopic analyses such as infrared and X-ray as well as microscopic investigation were performed to evaluate the solidified waste form exposed to different undesirable climatic conditions during extending disposal durations. The use of Portland cement as a stabilizer for water hyacinth, following the phytoremediation process, achieves the requirements for durability and strength against the freeze-thaw cycles or flooding in different types of water during prolonged disposal.

  3. The efficient role of aquatic plant (water hyacinth) in treating domestic wastewater in continuous system.

    Science.gov (United States)

    Rezania, Shahabaldin; Din, Mohd Fadhil Md; Taib, Shazwin Mat; Dahalan, Farrah Aini; Songip, Ahmad Rahman; Singh, Lakhweer; Kamyab, Hesam

    2016-01-01

    In this study, water hyacinth (Eichhornia crassipes) was used to treat domestic wastewater. Ten organic and inorganic parameters were monitored in three weeks for water purification. The six chemical, biological and physical parameters included Dissolved Oxygen (DO), Biological Oxygen Demand (BOD), Chemical Oxygen Demand (COD), Ammoniacal Nitrogen (NH3-N), Total Suspended Solids (TSS), and pH were compared with the Interim National Water Quality Standards, Malaysia River classification (INWQS) and Water Quality Index (WQI). Between 38% to 96% of reduction was observed and water quality has been improved from class III and IV to class II. Analyses for Electricity Conductivity (EC), Salinity, Total Dissolved Solids (TDS) and Ammonium (NH4) were also investigated. In all parameters, removal efficiency was in range of 13-17th day (optimum 14th day) which was higher than 3 weeks except DO. It reveals the optimum growth rate of water hyacinth has great effect on waste water purification efficiency in continuous system and nutrient removal was successfully achieved.

  4. Protein Rich Flour from Hyacinth Bean as Functional Food Ingredient with Low Glycemic Index

    Directory of Open Access Journals (Sweden)

    Ahmad Nafi’

    2013-06-01

    Full Text Available Protein-rich flour (PRF produced from Hyacinth bean (Lablab purpureus (L Sweet shows good potency as a functional food ingredient. The PRF was extracted from hyacinth bean using water followed by protein precipitation at its isoelectric point. The precipitate was neutralized using 1 N NaOH and the slurry was dried, ground and sieved. The objective of this research was to characterize the nutritive value of PRF i.e., protein content and amino acid profile, trypsin inhibitors activity, content of vitamins B1 and B2, the amylose and amylopectin ratio of starch and its glycemic index. The results showed that the PRF contained high protein (58.4±4.5%. The major amino acid was glutamic acid, while methionine was found as the limited amino acid of the PRF. The activity of trypsin inhibitor was low (20.4±1.6 unit/g. Moreover, PRF contains 0.2 and 3.6 mg/100 g of vitamins B1 and B2 respectively. With a high ratio of amylose (30.0±2.0% and high content of resistance starch (7.97 g/100 g, the PRF showed a low glycemic index (43.50. Based on its characteristics, this PRF can be promoted as a new food ingredient, especially for diabetic diet.

  5. The porous carbon derived from water hyacinth with well-designed hierarchical structure for supercapacitors

    Science.gov (United States)

    Zheng, Kaiwen; Li, Yuanyuan; Zhu, Ming; Yu, Xi; Zhang, Mengyan; Shi, Ling; Cheng, Jue

    2017-10-01

    A hierarchical porous water hyacinth-derived carbon (WHC) is fabricated by pre-carbonization and KOH activation for supercapacitors. The physicochemical properties of WHC are researched by scanning electron microscopy (SEM), N2 adsorption-desorption measurements, X-ray diffraction (XRD), Raman spectroscopy and X-ray photoelectron spectroscopy (XPS). The results indicate that WHC exhibits hierarchical porous structure and high specific surface area of 2276 m2/g. And the electrochemical properties of WHC are studied by cyclic voltammetry (CV), galvanostatic charge-discharge and electrochemical impedance spectroscopy (EIS) tests. In a three-electrode test system, WHC shows considerable specific capacitance of 344.9 F/g at a current density of 0.5 A/g, good rate performance with 225.8 F/g even at a current density of 30 A/g, and good cycle stability with 95% of the capacitance retention after 10000 cycles of charge-discharge at a current density of 5 A/g. Moreover, WHC cell delivers an energy density of 23.8 Wh/kg at 0.5 A/g and a power density of 15.7 kW/kg at 10 A/g. Thus, using water hyacinth as carbon source to fabricate supercapacitors electrodes is a promising approach for developing inexpensive, sustainable and high-performance carbon materials. Additionally, this study supports the sustainable development and the control of biological invasion.

  6. Phytoextraction of trace elements by water hyacinth in contaminated area of gold mine tailing.

    Science.gov (United States)

    Romanova, Tamara E; Shuvaeva, Olga V; Belchenko, Ludmila A

    2016-01-01

    The ability of water hyacinth (Eichhornia crassipes) to uptake Ag, Ba, Cd, Mo, and Pb from waters in gold mine tailing area was studied. All experiments were carried out in the field conditions without using of model system. Bioconcentration (BCF) and translocation factors (TF) as well as elements accumulation by plant in different points of tailings-impacted area were evaluated. It has been shown that water hyacinth demonstrates high ability to accumulate Mo, Pb, and Ba with BCF values 24,360 ± 3600, 18,800 ± 2800 and 10,040 ± 1400, respectively and is efficient in translocation of Mo and Cd. The general trend of the plant accumulation ability in relation to the studied elements corresponds to their concentration in the medium. As the distance from tailings increases, concentration of Ag, Ba and Pb in plant decreases more clearly than that of Cd, while the amount of Mo accumulated by plant doesn't drop significantly in accordance with its concentration in water. Under the conditions of the confluence of river Ur and drainage stream Ba and Ag can be considered as potential candidates for phytomining.

  7. Biogas production from water hyacinth and channel grass used for phytoremediation of industrial effluents.

    Science.gov (United States)

    Singhal, V; Rai, J P N

    2003-02-01

    The paper reports on the biogas production from water hyacinth (Eichhornia crassipes) and channel grass (Vallisneria spiralis) employed separately for phytoremediation of lignin and metal-rich pulp and paper mill and highly acidic distillery effluents. These plants eventually grow well in diluted effluent up to 40% (i.e., 2.5-times dilution with deionized water) and often take up metals and toxic materials from wastewater for their metabolic use. Slurry of the two plants used for phytoremediation produced significantly more biogas than that produced by the plants grown in deionized water; the effect being more marked with plants used for phytoremediation of 20% pulp and paper mill effluent. Biogas production from channel grass was relatively greater and quicker (maximum in 6-9 days) than that from water hyacinth (in 9-12 days). Such variation in biogas production by the two macrophytes has been correlated with the changes in C, N and C/N ratio of their slurry brought by phytoremediation.

  8. Identifying relevant hyperspectral bands using Boruta: a temporal analysis of water hyacinth biocontrol

    Science.gov (United States)

    Agjee, Na'eem Hoosen; Ismail, Riyad; Mutanga, Onisimo

    2016-10-01

    Water hyacinth plants (Eichhornia crassipes) are threatening freshwater ecosystems throughout Africa. The Neochetina spp. weevils are seen as an effective solution that can combat the proliferation of the invasive alien plant. We aimed to determine if multitemporal hyperspectral data could be utilized to detect the efficacy of the biocontrol agent. The random forest (RF) algorithm was used to classify variable infestation levels for 6 weeks using: (1) all the hyperspectral bands, (2) bands selected by the recursive feature elimination (RFE) algorithm, and (3) bands selected by the Boruta algorithm. Results showed that the RF model using all the bands successfully produced low-classification errors (12.50% to 32.29%) for all 6 weeks. However, the RF model using Boruta selected bands produced lower classification errors (8.33% to 15.62%) than the RF model using all the bands or bands selected by the RFE algorithm (11.25% to 21.25%) for all 6 weeks, highlighting the utility of Boruta as an all relevant band selection algorithm. All relevant bands selected by Boruta included: 352, 754, 770, 771, 775, 781, 782, 783, 786, and 789 nm. It was concluded that RF coupled with Boruta band-selection algorithm can be utilized to undertake multitemporal monitoring of variable infestation levels on water hyacinth plants.

  9. Present status of the development of mycoherbicides against water hyacinth: successes and challenges. A review

    Directory of Open Access Journals (Sweden)

    Jijakli, MH.

    2012-01-01

    Full Text Available Recent trends in the implementation of bioherbicide use in the control of water hyacinth (Eichhornia crassipes [Martius] Solms Laubach have depended primarily on several strategies. The use of bioherbicides has been stimulated as part of the search for alternatives to chemical control, as the use of these more environmentally-friendly formulations minimizes hazards resulting from herbicide residue to both human and animal health, and to the ecology. In addition, one of the major strategies in the concept of biological control is the attempt to incorporate biological weed control methods as a component of integrated weed management, in order to achieve satisfactory results while reducing herbicide application to a minimum. Several fungal pathogens with mycoherbicide potential (Sclerotinia sclerotiorum in Hyakillä and Cercospora rodmanii, named ABG-5003 have been discovered on diseased water hyacinth plants, but none has become commercially available in the market. Biological, technological, and commercial constraints have hindered progress in this area. Many of these constraints are being addressed, but there is a critical need to better understand the biochemical and physiological data regarding the pathogenesis of these new bioherbicides. Oil emulsions are recognized as a way to increase both efficiency of application and efficacy of biocontrol agents.

  10. BIOSORPTION AND RECOVERY OF HEAVY METALS FROM AQUEOUS SOLUTIONS BY EICHHORNIA CRASSIPES (WATER HYACINTH ASH

    Directory of Open Access Journals (Sweden)

    Tariq Mahmood

    2010-04-01

    Full Text Available Heavy metal’s release without treatment poses a significant threat to the environment. Heavy metals are non-biodegradable and persistent. In the present study the ash of water hyacinth (Eichhornia crassipes, was used to remove six metals from aqueous solutions through biosorption. Results of batch and column experiments showed excellent adsorption capacity. Removal of lead, chromium, zinc, cadmium, copper, and nickel was 29.83, 1.263, 1.575, 3.323, 2.984 and 1.978 µgg-1, respectively. The biosorptive capacity was maximum with pH >8.00. Desorption in µgg-1 of ash for lead, chromium, zinc, cadmium, copper, and nickel was 18.10, 9.99, 11.99, 27.54, 21.09, and 3.71 respectively. Adsorption/desorption of these metals from ash showed the potential of this technology for recovery of metals for further usages. Hydrogen adsorption was also studied with a Sievert-type apparatus. Hydrogen adsorption experiments showed significant storage capacity of water hyacinth ash.

  11. Phytoremediation of wastewater toxicity using water hyacinth (Eichhornia crassipes) and water lettuce (Pistia stratiotes).

    Science.gov (United States)

    Victor, Kouamé Kouamé; Séka, Yapoga; Norbert, Kouadio Kouakou; Sanogo, Tidou Abiba; Celestin, Atsé Boua

    2016-10-02

    This paper elucidates the phytoremediation potential of water hyacinth and water lettuce on the reduction of wastewater toxicity. Acute toxicity tests were performed in an aquarium with a population of Sarotherodon melanotheron, contaminated by different concentrations of wastewaters before and after phytoremediation with Eichhornia crassipes and Pistia stratiotes. Lethal concentrations (LC50) of the fish's population obtained during 24 hours of exposures were determined. COD, BOD, ammonium, TKN and PO4(3-) concentrations in wastewaters were of 1850.29, 973.33, 38.34, 61.49 and 39.23 mg L(-1), respectively, for each plant. Phytoremediation reduced 58.87% of ammonium content, 50.04% of PO4(3-), 82.45% of COD and 84.91% of BOD. After 15 days of the experiment, metal contents in treated wastewaters decreased from 6.65 to 97.56% for water hyacinth and 3.51 to 93.51% for water lettuce tanks. Toxicity tests showed that the mortality of fish exposed increased with increase in concentration of pollutants in wastewaters and the time of exposure. Therefore, the highest value of LC50 was recorded for fish subjected to 3 hours of exposure (16.37%). The lowest rate was obtained after an exposure of 20 to 24 hours (5.85%). After phytoremediation, the effluents purified by Eichhornia crassipes can maintain the fish life beyond 24 hours of exposure.

  12. Stability of cemented dried water hyacinth used for biosorption of radionuclides under various circumstances

    Energy Technology Data Exchange (ETDEWEB)

    Saleh, H.M., E-mail: hosamsaleh70@yahoo.com

    2014-03-15

    This paper investigates the influence of frost attack and flooding conditions during disposal on the compressive strength, porosity and durability of cemented waste form contained dried and grinded water hyacinth. This plant was used as a phytoremediating agent to treat liquid waste simulate contaminated with radionuclides. The obtained results showed that an increase in the incorporated dry plants decreases the compressive strength and increases the porosity of the solidified waste form. Raising the number of freeze–thaw cycles was accompanied with noticeable increase in the mass-loss of tested specimens and unsteady trend of compressive strength and consequently the mechanical integrity. The presence and increase of immersion duration per turned positively the mass change and affect in different ways on the solidified waste form. Spectroscopic analyses such as infrared and X-ray as well as microscopic investigation were performed to evaluate the solidified waste form exposed to different undesirable climatic conditions during extending disposal durations. The use of Portland cement as a stabilizer for water hyacinth, following the phytoremediation process, achieves the requirements for durability and strength against the freeze–thaw cycles or flooding in different types of water during prolonged disposal.

  13. Total reflection X-ray fluorescence spectrometric determination of elements in water hyacinth from the Lerma River

    Science.gov (United States)

    Tejeda, S.; Zarazúa, G.; Ávila-Pérez, P.; Carapia-Morales, L.; Martínez, T.

    2010-06-01

    The Lerma River is one of the most polluted body water in Mexico. For this reason, only the highly resistant organisms such as water hyacinth are able to reproduce in this river. The aim of this work was to evaluate the concentration of K, S, Fe, Ca, Mn, Ti, Zn, Sr, Rb, Cu, Cr, Ni, Pb and Br in roots of water hyacinth ( Eichhornia crassipes) from the Lerma River. The samples were collected from five sites in the river and analyzed in triplicate using a TXRF Spectrometer 'TX-2000 Ital Structures' with a Si(Li) detector and a resolution of 140 eV (FWHM) at Mn Kα. A Mo tube (40 kV, 30 mA) with 17.4 KeV excitation energy was used for a counting time of 500 s. Results show that the average metal concentration in the water hyacinth roots decrease in the following order: K (9698.2 µg/g) > S (7593.3 µg/g) > Fe (4406.6 µg/g) > Ca (2601.8 µg/g) > Mn (604.2 µg/g) > Ti (230.7 µg/g) > Zn (51.65 µg/g) > Sr (43.55 µg/g) > Rb (18.61 µg/g) > Cu (12.78 µg/g) > Cr (6.45 µg/g) > Ni (4.68 µg/g) > Pb (4.32 µg/g) > Br (4.31 µg/g) and the bioconcentration factors in the water hyacinth decrease in the sequence: Ti > Fe > Mn > Cu > Ni > Zn > S > Pb > Rb > K > Cr > Sr > Br > Ca. The concentrations in roots of water hyacinth reflect the high pollution level of the river.

  14. Total reflection X-ray fluorescence spectrometric determination of elements in water hyacinth from the Lerma River

    Energy Technology Data Exchange (ETDEWEB)

    Tejeda, S. [Instituto Nacional de Investigaciones Nucleares, Gerencia de Ciencias Ambientales, Apartado Postal 18-1027, Mexico D.F., C.P. 11801 (Mexico); Instituto Tecnologico de Toluca, Division de Estudios de Posgrado e Investigacion, Apartado Postal 890, Metepec, C.P. 52149 (Mexico); Zarazua, G., E-mail: graciela.zarazua@inin.gob.m [Instituto Nacional de Investigaciones Nucleares, Gerencia de Ciencias Ambientales, Apartado Postal 18-1027, Mexico D.F., C.P. 11801 (Mexico); Avila-Perez, P. [Instituto Nacional de Investigaciones Nucleares, Gerencia de Ciencias Ambientales, Apartado Postal 18-1027, Mexico D.F., C.P. 11801 (Mexico); Instituto Tecnologico de Toluca, Division de Estudios de Posgrado e Investigacion, Apartado Postal 890, Metepec, C.P. 52149 (Mexico); Carapia-Morales, L. [Instituto Nacional de Investigaciones Nucleares, Gerencia de Ciencias Ambientales, Apartado Postal 18-1027, Mexico D.F., C.P. 11801 (Mexico); Martinez, T. [Universidad Nacional Autonoma de Mexico, Facultad de Quimica, Mexico D.F. (Mexico)

    2010-06-15

    The Lerma River is one of the most polluted body water in Mexico. For this reason, only the highly resistant organisms such as water hyacinth are able to reproduce in this river. The aim of this work was to evaluate the concentration of K, S, Fe, Ca, Mn, Ti, Zn, Sr, Rb, Cu, Cr, Ni, Pb and Br in roots of water hyacinth (Eichhornia crassipes) from the Lerma River. The samples were collected from five sites in the river and analyzed in triplicate using a TXRF Spectrometer 'TX-2000 Ital Structures' with a Si(Li) detector and a resolution of 140 eV (FWHM) at Mn K{alpha}. A Mo tube (40 kV, 30 mA) with 17.4 KeV excitation energy was used for a counting time of 500 s. Results show that the average metal concentration in the water hyacinth roots decrease in the following order: K (9698.2 {mu}g/g) > S (7593.3 {mu}g/g) > Fe (4406.6 {mu}g/g) > Ca (2601.8 {mu}g/g) > Mn (604.2 {mu}g/g) > Ti (230.7 {mu}g/g) > Zn (51.65 {mu}g/g) > Sr (43.55 {mu}g/g) > Rb (18.61 {mu}g/g) > Cu (12.78 {mu}g/g) > Cr (6.45 {mu}g/g) > Ni (4.68 {mu}g/g) > Pb (4.32 {mu}g/g) > Br (4.31 {mu}g/g) and the bioconcentration factors in the water hyacinth decrease in the sequence: Ti > Fe > Mn > Cu > Ni > Zn > S > Pb > Rb > K > Cr > Sr > Br > Ca. The concentrations in roots of water hyacinth reflect the high pollution level of the river.

  15. Does fertilizer (N15P15K15) amendment enhance phytoremediation of petroleum-polluted aquatic ecosystem in the presence of water hyacinth (Eichhornia crassipes [Mart.] Solms)?

    Science.gov (United States)

    Ndimele, Prince Emeka; Jenyo-Oni, Adetola; Chukwuka, Kanayo S; Ndimele, Chinatu Charity; Ayodele, Ibukunoluwa Augustine

    2015-01-01

    This study investigated the effects of inorganic fertilizer (N15P15K15) amendments on crude oil uptake by water hyacinth. Experimental units (water hyacinth grown in fresh water) were spiked with 0, 20, 40 and 60 mg/L crude oil. After 24 h, they were randomly assigned fertilizer (N15P15K15) at three different concentrations; 0, 6 and 10 mg/L. Crude oil degradation and absorption were determined by measuring total petroleum hydrocarbon (TPH) in the water column and water hyacinth, respectively. The measurements were taken monthly for six months (February-August 2010). The results showed that TPH concentration in the water column in the treatment amended at 6 mg/L (0.30 ± 0.01 mg/L) was significantly lower (p phytoremediation) absorbed significantly higher (p phytoremediation of crude oil by water hyacinth and biostimulation with fertilizer (N15P15K15) is possible.

  16. Pärnu jõgi - linna unustatud arengutelg = The Pärnu river - forgotten growth axis of the town / Rene Valner

    Index Scriptorium Estoniae

    Valner, René, 1972-

    2001-01-01

    Pärnu Linnavalitsuse ja Eesti Kunstiakadeemia korraldatud arhitektuuri ja kohamarketingi Riveside Workshop'ist 18.-28. VI 2001. a. Pärnus. Juhendajad: Viini arhitektuuribüroo Rataplan arhitektid Gerhard Huber ja Susanne Höhndorf, eesti arhitektid Siiri Vallner, Rene Valner ja Indrek Peil

  17. Pärnu jõgi - linna unustatud arengutelg = The Pärnu river - forgotten growth axis of the town / Rene Valner

    Index Scriptorium Estoniae

    Valner, René, 1972-

    2001-01-01

    Pärnu Linnavalitsuse ja Eesti Kunstiakadeemia korraldatud arhitektuuri ja kohamarketingi Riveside Workshop'ist 18.-28. VI 2001. a. Pärnus. Juhendajad: Viini arhitektuuribüroo Rataplan arhitektid Gerhard Huber ja Susanne Höhndorf, eesti arhitektid Siiri Vallner, Rene Valner ja Indrek Peil

  18. Sartre: A Collection of Critical Essays. Twentieth Century Views Series.

    Science.gov (United States)

    Kern, Edith, Ed.

    One of a series of works aimed at presenting contemporary critical opinion on major authors, this collection includes essays by Edith Kern, Claude-Edmonde Magny, Henri Peyre, Kenneth Douglas, Edmund Wilson, Theophil Spoerri, Jacques Guicharnaud, Eric Bentley, Robert Champigny, Oreste F. Pucciani, Frederic Jameson, Rene Girard, Guido…

  19. Sartre: A Collection of Critical Essays. Twentieth Century Views Series.

    Science.gov (United States)

    Kern, Edith, Ed.

    One of a series of works aimed at presenting contemporary critical opinion on major authors, this collection includes essays by Edith Kern, Claude-Edmonde Magny, Henri Peyre, Kenneth Douglas, Edmund Wilson, Theophil Spoerri, Jacques Guicharnaud, Eric Bentley, Robert Champigny, Oreste F. Pucciani, Frederic Jameson, Rene Girard, Guido…

  20. Computed Tomography of the diabetic kidney; La Tomografia Computerizzata nello studio del rene diabetico

    Energy Technology Data Exchange (ETDEWEB)

    Angelelli, G.; Stabile Ianora, A.A.; Scardapane, A.; Rotondo, A. [Bari Univ., Bari (Italy). Ist. di Radiologia

    2000-02-01

    anni) e di 20 soggetti sani (12 maschi, 8 femmine, eta' media: 58 anni). Lo studio TC e' stato eseguito con tecnica spirale trifasica; i dati acquisiti sono stati successivamente trasferiti su una stazione di lavoro ed analizzati con il software applicativo Multiplanar Reconstruction (MPR) che ha permesso ricostruzioni secondo piani assiale e coronale. Si sono considerati i parametri morfometrici (presenza di calcificazioni parenchimali e/o vascolari, dimensioni del rene nelle sezioni assiale e longitudinale, superficie renale in sezione longitudinale, rapporto cortico-midollare), densitometrici (densita' renale senza mdc, densita' della corticale e della midollare nella fase arteriosa, densita' nella fase tubulonefrografica) e funzionali (omogeneo incremento di densita' in fase tubulonefrografica e presenza della fase escretoria) e confrontato i valori ottenuti nei vari sottogruppi di pazienti diabetici e nel gruppo di controllo. Le dimensioni renali nella sezione assiale sono risultate significativamente inferiori (p<0,05) nei pazienti con durata minore del diabete presentavano reni significativamente piu' grandi nella sezione assiale rispetto agli altri gruppi; tali dimensioni si riducevano significativamente nel gruppo con durata piu' lunga della malattia. La valutazione delle dimensioni renali e soprattutto della riduzione della densita' della corticale renale nella fase arteriosa puo' essere utile come indice di nefropatia nei pazienti diabetici non insulino dipendenti. Ulteriori ricerche sono tuttavia necessarie per raggiungere validi protocolli utilizzabili nella pratica quotidiana.

  1. Phytoremediation of Heavy Metal-Polluted Aquatic Ecosystem (Ologe Lagoon) By Water Hyacinth (Eichhornia crassipes [Mart.] Solms) and the Socio-Egological Implications

    Science.gov (United States)

    Ndimele, C. C.; Chukwuka, K. S.; Ndimele, P. E.

    2016-02-01

    The indiscriminate discharge of industrial effluents containing harmful substances such as heavy metals has become a global problem because of the negative effects of these substances on humans. Water hyacinth (Eichhornia crassipes) has been considered a menace since it entered Nigerian inland waters through neighbouring Republic of Benin in the 80's. Attempts to eradicate it has not been successful. Thus, the need to explore it useful potentials. It is used in paper production, feed formulation, phytoremediation etc. Phytoremediation is a bioremediation process that uses plants to remove, transfer, stabilize, and/or destroy pollutants in soil and water. The aim of the study was to investigate the phytoremediative potentials of water hyacinth resident in Ologe Lagoon as well as the socio-economic and ecological implications of their invasiveness. The study was conducted over a period of 18 months and 5 sampling stations were selected based on their proximity to the point of discharge of effluent, presence of water hyacinth and human activities. Water, sediment and water hyacinth samples were collected monthly from each sampling station and analysed for heavy metals (Cu, Fe, Pb, Zn, Cd, and As). Questionnaire was also administered for socio-economic impact assessment. The results showed that water hyacinth can absorb heavy metals from water even when the concentration of the metal in water is low. It was also discovered that water hyacinth invasion of Ologe Lagoon has adversely affected fishing, navigation, aesthetic and cultural values of the Lagoon.

  2. Mechanisms of deformation and fracture in high temperature low cycle fatigue of Rene 80 and IN 100

    Science.gov (United States)

    Romanoski, G. R., Jr.

    1982-01-01

    Specimens tested for the AGARD strain range partitioning program were investigated. Rene 80 and IN 100 were tested in air and in vacuum; at 871 C, 925 C, and 1000 C; and in the coated and uncoated condition. The specimens exhibited a multiplicity of high-temperature low-cycle fatigue damage. Observations of the various forms of damage were consistent with material and testing conditions and were generally in agreement with previous studies. In every case observations support a contention that failure occurs at a particular combination of crack length and maximum stress. A failure criterion which is applicable in the regime of testing studied is presented. The predictive capabilities of this criterion are straight forward.

  3. SEM in-situ Fatigue Observation on Crack Initiation and Growth from Inclusion in P/M Rene95 Superalloy

    Institute of Scientific and Technical Information of China (English)

    2001-01-01

    A special designed experiment was conducted for observing cr ack initiation and growth in P/M Rene95 superalloy under tension-tensi on loading by self-made SEM in-situ fatigue loading stag. Several alum ina inclusion particles exposed at the specimen surface were observed carefully. During fatigue test inclusions led to cracks initiation. Th e cracks can be formed by two mechanisms. Generally, the cracks nuclea ted at the interface between inclusion and matrix. Sometimes, cracks w ere also formed inside the inclusion. As the increase of cycles, some cracks at the interface between inclusion and matrix broadened and pro pagated along the direction about 45€?to the loading axis. On the oth er hand, the cracks inside the inclusion propagated in the inclusion a nd towards matrix.

  4. A phenomenological constitutive equation for Rene 95 PM alloy and its application to isothermal forging process of turbine disk

    Institute of Scientific and Technical Information of China (English)

    2002-01-01

    The flow behavior of Rene 95 PM alloy was studied from 1050 to 1150℃with strain rate of 1€?10, 1€?10, 1€?10 and 1. At a given temperature and strain rate, flow curves exhibit a peak followed by flow softening up to a steady state. Moreover, at constant strain, flow stress increases with increasing strain rate and decreasing temperature. An equation relating hyperbolic sine of flow stress to hot working parameters, such as strain, strain rate and temperature, was established by using multiple nonlinear regression method. A very good agreement was found between predicted and experimental flow stress in all the strain range investigated. Application of the constitutive equation in predicting forming loads and flow behavior and temperature distribution in both upper and lower dies in an isothermal forging process of turbine disk of large dimension (about 630mm) by means of a finite element code was systematically analyzed.

  5. Feasibility Study of Establishing Business with Charcoal Briquetting Made from Water Hyacinth and Abandoned Biomass

    Directory of Open Access Journals (Sweden)

    Jake M. Laguador

    2013-08-01

    Full Text Available Offering environment-friendly products would not only lessen the pollution but it also suggests greater benefits to the economic productivity since it is offered with lower price due to its raw materials from abandoned biomass. The purpose of the proposed project is to establish a manufacturing plant of charcoal briquette that is made up of combustible materials and water hyacinth. This study used a descriptive type of research method with survey questionnaire administered to the target respondents who were owners of restaurants that utilized charcoal for grilling. The company adopts partnership form of ownership and based on the result of the survey, the study is feasible in the region and raw materials were abundant in the nearby towns and provinces. It is resolute to establish a business which offers high quality and low priced green charcoal in the market as alternative biofuel with payback period of 4 years and 11 monthsbased on the result of financial analysis.

  6. Effect of illuminating gas on the lily, narcissus, tulip, and hyacinth

    Energy Technology Data Exchange (ETDEWEB)

    Hitchcock, A.E.; Crocker, W.; Zimmerman, P.W.

    1932-01-01

    The gas used in these studies was primarily ethylene, as this is the constituent of illuminating gas which has the greatest injury-causing potential. The plants used were lily, narcissus, tulip and hyacinth. The time of exposure varied from one to seven days. All were retarded in growth during treatment by all concentrations of illuminating gas without causing death or abscission of leaves. Pronounced response of leaves to gas depended on the age, rate of growth, and the variety of plant. The effect of the gas on flowering depended upon the age of the bud at the time of exposure, the variety of plant, and the concentration of gas used. 5 references, 6 figures, 6 tables.

  7. Kinetic, isotherm and thermodynamic studies of amaranth dye biosorption from aqueous solution onto water hyacinth leaves.

    Science.gov (United States)

    Guerrero-Coronilla, Imelda; Morales-Barrera, Liliana; Cristiani-Urbina, Eliseo

    2015-04-01

    The present study explored the kinetics, equilibrium and thermodynamics of amaranth (acid red 27) anionic dye (AD) biosorption to water hyacinth leaves (LEC). The effect of LEC particle size, contact time, solution pH, initial AD concentration and temperature on AD biosorption was studied in batch experiments. AD biosorption increased with rising contact time and initial AD concentration, and with decreasing LEC particle size and solution pH. Pseudo-second-order chemical reaction kinetics provided the best correlation for the experimental data. Isotherm studies showed that the biosorption of AD onto LEC closely follows the Langmuir isotherm, with a maximum biosorption capacity of about 70 mg g(-1). The thermodynamic parameters confirm that AD biosorption by LEC is non-spontaneous and endothermic in nature. Results indicate that LEC is a strong biosorbent capable of effective detoxification of AD-laden wastewaters.

  8. Sustainability assessment of water hyacinth fast pyrolysis in the Upper Paraguay River basin, Brazil.

    Science.gov (United States)

    Buller, Luz Selene; Ortega, Enrique; Bergier, Ivan; Mesa-Pérez, Juan Miguel; Salis, Suzana Maria; Luengo, Carlos Alberto

    2015-11-01

    Fast pyrolysis of naturally produced water hyacinth was assessed through Emergy accounting approach. Two analyses were carried out to evaluate the influence of additional services and externalities on Emergy indicators for a pyrolysis plant unit able to process 1000 kg of dry biomass per hour. The initial approach was a traditional Emergy assessment in which financial fluxes and externalities were not considered. The second approach included taxes and fees of the Brazilian government, interests related to financing operations and assumes a reserve financial fund of 5% of the total investment as externalities cost. For the first evaluation, the renewability of 86% indicates that local and renewable resources mainly support the process and the Emergy Yield Ratio of 3.2 shows that the system has a potential contribution to the regional economy due to the local resources use. The inclusion of financial fluxes and externalities in the second evaluation reduces both renewability and Emergy Yield Ratio, whereas it increases the Emergy Investment Ratio which means a higher dependence on external resources. The second analysis allows portraying significant forces of the industrial and financial systems and the evaluation of the externalities' impact on the general system Emergy behavior. A comparison of the renewability of water hyacinth fast pyrolysis with other biofuels like soybean biodiesel and sugarcane ethanol indicates that the former is less dependent on fossil fuel resources, machinery and fertilizers. To complement the sustainability assessment provided by the Emergy method, a regular financial analysis for the second defined system was done. It shows that the system is financially attractive even with the accounting of additional costs. The results obtained in this study could be used as the maximum and minimum thresholds to subsidize regulatory policies for new economic activities in tropical wetlands involving natural resources exploitation and bio

  9. Effectiveness of Domestic Wastewater Treatment Using a Bio-Hedge Water Hyacinth Wetland System

    Directory of Open Access Journals (Sweden)

    Alireza Valipour

    2015-01-01

    Full Text Available onstructed wetland applications have been limited by a large land requirement and capital investment. This study aimed to improve a shallow pond water hyacinth system by incorporating the advantages of engineered attached microbial growth technique (termed Bio-hedge for on-site domestic wastewater treatment. A laboratory scale continuous-flow system consists of the mesh type matrix providing an additional biofilm surface area of 54 m2/m3. Following one year of experimentation, the process showed more stability and enhanced performance in removing organic matter and nutrients, compared to traditional water hyacinth (by lowering 33%–67% HRT and facultative (by lowering 92%–96% HRT ponds. The wastewater exposed plants revealed a relative growth rate of 1.15% per day, and no anatomical deformities were observed. Plant nutrient level averaged 27 ± 1.7 and 44 ± 2.3 mg N/g dry weight, and 5 ± 1.4 & 9±1.2 mg P/g dry weight in roots and shoots, respectively. Microorganisms immobilized on Bio-hedge media (4.06 × 107 cfu/cm2 and plant roots (3.12 × 104 cfu/cm were isolated and identified (a total of 23 strains. The capital cost was pre-estimated for 1 m3/d wastewater at 78 US$/m3inflow and 465 US$/kg BOD5 removed. This process is a suitable ecotechnology due to improved biofilm formation, reduced footprint, energy savings, and increased quality effluent.

  10. Cellulase Production by Native Bacteria Using Water Hyacinth as Substrate under Solid State Fermentation

    Directory of Open Access Journals (Sweden)

    Suresh Chandra Kurup, R.

    2005-01-01

    Full Text Available Most of the freshwater systems in tropical countries are infested with one kind of aquatic weed or the other causing serious environmental problems. All efforts to control the growth and spread of these weeds have failed miserably and hence the concept of eradication through utilization is being adopted by many researchers. Solid state fermentation, the culturing of microorganisms on moist solid substrates in the absence or near absence of free water, has generatedgreat deal of interest among researchers because of its various advantages over the submerged fermentation technique. Cellulase enzyme is used extensively in various industries, especially in textile, food and in the bioconversion of lignocellulosic wastes to alcohol. The extensive use of cellulase in industries depends on the cost of the enzyme and hence considerable research is being carried out to isolate better microbial strains and also to develop new fermentationprocesses with the aim to reduce the product cost. The objective of the present study is to determine whether water hyacinth, one of the commonly found aquatic weeds, can be used as a substrate for cellulase production, by three native bacterial isolates named WHB 3, WHB 4 and SMB 3, under the process of solid state fermentation. Results indicatethat all the three isolates produced cellulase enzyme by using water hyacinth as the solid support. Under optimized conditions of moisture, pH, temperature, incubation time and inoculum concentration, the enzyme yield increased from 16.8 to 94.8 units for SMB 3, from 25.2 to 110.4 units for WHB 3 and from 18.0 to 127.2 units for WHB 4. The addition of nitrogen and carbon sources resulted in a significant increase in cellulase yield and WHB 3 produced the maximum amount of 216 units followed by SMB 3 and WHB 4.

  11. Identification of key drought stress-related genes in the hyacinth bean.

    Directory of Open Access Journals (Sweden)

    Lu-Ming Yao

    Full Text Available Hyacinth bean (Lablab purpureus [Linn.] Sweet possesses excellent characteristics for field production, but the response of this plant to drought stress has not been described at the molecular level. Suppression subtraction hybridization (SSH is an effective way to exploit key factors for plant responses to drought stress that are involved in transcriptional and metabolic activities. In this study, forward and reverse SSH libraries were generated from root tissues of the drought-tolerant hyacinth bean genotype MEIDOU 2012 under water-stress conditions. A total of 1,287 unigenes (94 contigs and 1,193 singletons were derived from sequence alignment and cluster assembly of 1400 ESTs, and 80.6% of those hit against NCBI non-redundant (nr database with E value <1E-06. BLASTX analysis revealed that the majority top matches were proteins form Glycine max (L. Merrill. (61.5%. According to a gene ontology (GO functional classification, 816 functionally annotated unigenes were assigned to the biological process category (74.1%, and 83.9% of them classified into molecular function and 69.2% involved in cellular component. A total of 168 sequences were further annotated with 207 Enzyme Commission (EC codes and mapped to 83 different KEGG pathways. Seventeen functionally relevant genes were found to be overrepresented under drought stress using enrichment analysis. Differential expression of unigenes were confirmed by quantitative real-time PCR assays, and their transcript profiles generally divided into three patterns, depending on the expression peaked levels after 6, 8 or 10 days dehydration, which indicated that these genes are functionally associated in the drought-stress response.

  12. Effects of lime on bioavailability and leachability of heavy metals during agitated pile composting of water hyacinth.

    Science.gov (United States)

    Singh, Jiwan; Kalamdhad, Ajay S

    2013-06-01

    In the present study composting of water hyacinth was done with cattle manure and saw dust (6:3:1) ratio and effects of addition of lime (1%, 2% and 3%) on heavy metal bioavailability and leachability was evaluated during 30 days of composting period. The changes in temperature, pH, electrical conductivity (EC), organic matter and extractable heavy metal contents were measured. Results showed that the total concentration of heavy metals was increased during the composting process. Due to addition of lime initial pH of the compost was raised effectively, caused a decrease in water soluble, diethylene triamine pentracetic acid (DTPA) and toxicity characteristics leaching procedure (TCLP) extractable metal contents in the final compost. Water soluble metals (Ni, Pb and Cd) and DTPA extractable metals (Pb and Cd) were not detected during water soluble fraction. Addition of lime significantly reduced the bioavailability and leachability of heavy metals during water hyacinth composting process.

  13. Removal of Cd(II) and Pb(II) from aqueous solution using dried water hyacinth as a biosorbent.

    Science.gov (United States)

    Ibrahim, Hanan S; Ammar, Nabila S; Soylak, Mustafa; Ibrahim, Medhat

    2012-10-01

    Possible usages of dried water hyacinth as biosorbent for metal ions were investigated. A model describing the plant is presented on density functional theory DFT and verified experimentally with FTIR. The model shows that water hyacinth is a mixture of cellulose and lignin. Dried shoot and root were found as good sorbent for Cd(II) and Pb(II) at optimum dosage of 5.0 g/l and pH 5.0; equilibrium time was attained within 30-60 min. The removal using root and shoot were nearly equal and reached more than 75% for Cd and more than 90% for Pb. Finally the second-order kinetics was the applicable model. Hydrogen bonds of reactive functional groups like COOH play the key role in the removal process.

  14. The determination of optimum condition in water hyacinth drying process by mixed adsorption drying method and modified fly ash as an adsorbent

    Science.gov (United States)

    Saputra, Asep Handaya; Putri, Rizky Anggreini

    2017-05-01

    Water hyacinth is an aquatic weed that has a very fast growth which makes it becomes a problem to the ecosystem. On the other hand, water hyacinth has a high fiber content (up to 20% by weight) which makes it potential to become raw material for composites and textile industries. As an aquatic plant, water hyacinth has a high initial moisture content that reaches more than 90%. Meanwhile the moisture content of fiber as a raw material for composite and textile industry should not be more than 10% to maintain the good quality of the products. Mixed adsorption drying method is one of the innovative method that can replace conventional drying process. Fluidization method which has been commonly used in agricultural and pharmaceutical products drying, can be enhanced by combining it with the adsorption method as performed in this study. In mixed fluidization-adsorption drying method, fly ash as adsorbent and water hyacinth fiber were put together into the fluidization column where the drying air evaporate the moisture content in water hyacinth fiber. In addition, the adsorbent adsorb the moisture content in the drying air to make the moisture content of the drying air remain low. The drying process is performed in various temperature and composition of water hyacinth and adsorbent in order to obtain the optimum drying condition. In addition, the effect of fly ash pellet and fly ash powder to the drying process was also performed. The result shows that the higher temperature and the more amount of adsorbent results in the faster drying rate. Fly ash pellet shows a better adsorption since it has a smaller pore diameter and wider surface area. The optimum temperature obtained from this study is 60°C and the optimum ratio of water hyacinth and fly ash is 50:50.

  15. Removal of aluminium by constructed wetlands with water hyacinth (Eichhornia crassipes (Mart.) Solms) grown under different nutritional conditions.

    Science.gov (United States)

    Jayaweera, Mahesh W; Kasturiarachchi, Jagath C; Kularatne, Ranil K A; Wijeyekoon, Suren L J

    2007-02-01

    This article reports the phytoremediation efficiencies of water hyacinth (Eichhornia crassipes (Mart.) Solms) grown under different nutritional conditions for Al rich wastewaters in batch type constructed wetlands (floating aquatic macrophyte-based plant treatment systems). This study was conducted for 15 weeks after 1 week acclimatization by culturing young water hyacinth (average height of 20 +/- 2 cm) in 590 L capacity fiberglass tanks under different nutrient concentrations of 2-fold [56 and 15.4 mg/L of total nitrogen (TN) and total phosphorous (TP), respectively], 1-fold, 1/2-fold, 1/4-fold and 1/8-fold with synthetic wastewaters containing 5.62 Al mg/L. A control set-up of hyacinths comprising only Al with no nutrients was also studied. A mass balance was carried out to investigate the phytoremediation efficiencies and to identify the different Al removal mechanisms from the wastewaters. Chemical precipitation of Al(OH)3 was a dominant contribution to Al removal at the beginning of the study, whereas adsorption of Al3+ to sediments was observed to be a predominant Al removal mechanism as the study progressed. Phytoremediation mainly due to rhizofiltration was also an important mechanism of Al removal especially during the first 4 weeks of the study in almost all the set-ups. However, chemical precipitation and sediment adsorption of Al3+ was a dominant contribution to Al removal in comparison with phytoremediation. Plants cultured in the control set-up showed the highest phytoremediation efficiency of 63% during the period of the 4th week. A similar scenario was evident in the 1/8-fold set-up. Hence we conclude that water hyacinth grown under lower nutritional conditions are more ideal to commence a batch type constructed wetland treating Al rich wastewaters with a hydraulic retention time of approximately 4 weeks, after which a complete harvesting is recommended.

  16. Rearing and Release of Megamelus scutellaris Berg (Hemiptera: Delphacidae) for Biological Control of Water hyacinth in 2015

    Science.gov (United States)

    2017-06-01

    Y. Liang. 2012. Comparing SPAD and atLEAF values for chlorophyll assessment in crop species. Canadian Journal of Soil Science 92:645–648...F. A. Dray Jr. 2010. Bottom-up control of water hyacinth weevil populations: Do the plants regulate the insects? Journal of Applied Ecology 47:329...Neochetina eichhorniae on waterhyacinth in Southern Louisiana. Journal of Aquatic Plant Management 22:57–61. ERDC/TN APCRP-BC-40 June 2017 11

  17. Selection, efficacy, ecological characterization and formulation of fungal control agents against water hyacinth [Eichhornia crassipes (Martius) Solms] in Mali

    OpenAIRE

    Dagno, Karim

    2011-01-01

    Rice and irrigated orchards are considered as the most important food and economical sources in Mali, which watered from Niger River. However, stable productions of rice and orchards products have been limited by many disease, insects, and weeds. Recently, water hyacinth infestation in river of Niger has increased drastically and as affected by the decrease of water flow due to clogging dams and irrigation work. Biological control of weeds is an alternative approach to chemical herbicide use,...

  18. Optimization of bioethanol production using whole plant of Water Hyacinth as substrate in Simultaneous Saccharification and Fermentation process

    OpenAIRE

    Qiuzhuo eZhang; Chen eWeng; Huiqin eHuang; Varenyam eAchal; Duanchao eWang

    2016-01-01

    The whole plant of Water Hyacinth that had potential to remove heavy metals from wastewater was used as substrate for bioethanol production in the current study. It was found that acid pretreatment exhibited the most effective for reducing sugars production. An amount of 402.93 mg reducing sugars was achieved at optimal condition after pretreatment and enzymatic hydrolysis. A regression model was built to optimize the fermentation factors according to Response Surface Method (RSM) in Sacchar...

  19. Water Hyacinth Identification Using CART Modeling With Hyperspectral Data in the Sacramento-San Joaquin River Delta of California

    Science.gov (United States)

    Khanna, S.; Hestir, E. L.; Santos, M. J.; Greenberg, J. A.; Ustin, S. L.

    2007-12-01

    Water hyacinth (Eichhornia crassipes) is an invasive aquatic weed that is causing severe economic and ecological impacts in the Sacramento-San Joaquin River Delta (California, USA). Monitoring its distribution using remote sensing is the crucial first step in modeling its predicted spread and implementing control and eradication efforts. However, accurately mapping this species is confounded by its several phenological forms, namely a healthy vegetative canopy, flowering canopy with dense conspicuous terminal flowers above the foliage, and floating dead and senescent forms. The full range of these phenologies may be simultaneously present at any time, given the heterogeneity of environmental and ecological conditions in the Delta. There is greater spectral variation within water hyacinth than between any of the co-occurring species (pennywort and water primrose), so classification approaches must take these different phenological stages into consideration. We present an approach to differentiating water hyacinth from co-occurring species based on knowledge of relevant variation in leaf chlorophyll, floral pigments, foliage water content, and variation in leaf structure using a classification and regression tree (CART) applied to airborne hyperspectral remote sensing imagery.

  20. Study on preparation of water hyacinth-based activated carbon for pulp and paper mill wastewater treatment.

    Science.gov (United States)

    Boonpoke, Anusorn

    2015-09-01

    Mulberry pulp and paper mills produce high chemical- and organic matter containing waste water in Thailand. Many of the mills are not equipped with wastewater treatment unit; their untreated effluent is directly discharged into recipient water resources. The effluent constituents are well recognized as acute and chronic pollutants that are hazardous to the environment. The present study aimed to investigate the utilization of an activated carbon from a low-cost material and to examine its adsorption performance using batch and fixed-bed adsorption. Water hyacinth was used as a raw material for activated carbon production via a chemical activation method. The results showed that water hyacinth-based activated carbon (WHAC) provided a high surface area of 912-1,066 m2g(-1) and exhibited micropore structure. Based on the Freundlich fit, the maximum adsorption capacity of COD and color was 4.52 mgg(-1) and 13.57 Pt-Cog(-1), respectively. The fixed bed adsorption provided maximum removal efficiency of 91.70 and 92.62% for COD and color, respectively. A continuous adsorption data agreed well with the Thomas kinetic model. In summary, water hyacinth can be used as a low-cost material for activated carbon production with high removal efficiency of COD and color for pulp and paper mill wastewater treatment.

  1. Removal of Cu(II) in aqueous media by biosorption using water hyacinth roots as a biosorbent material

    Energy Technology Data Exchange (ETDEWEB)

    Zheng Jiachuan; Feng Huimin [Advanced Lab for Environmental Research and Technology, USTC-CityU, Suzhou, 215123 (China); Department of Chemistry, University of Science and Technology of China, Hefei, 230026 (China); Department of Biology and Chemistry, City University of Hong Kong, 83 Tat Chee Avenue, Kowloon (Hong Kong); Lam, Michael Hon-Wah, E-mail: bhmhwlam@cityu.edu.hk [Advanced Lab for Environmental Research and Technology, USTC-CityU, Suzhou, 215123 (China); Department of Biology and Chemistry, City University of Hong Kong, 83 Tat Chee Avenue, Kowloon (Hong Kong); Lam, Paul Kwan-Sing [Advanced Lab for Environmental Research and Technology, USTC-CityU, Suzhou, 215123 (China); Department of Biology and Chemistry, City University of Hong Kong, 83 Tat Chee Avenue, Kowloon (Hong Kong); Ding Yanwei [Hefei National Laboratory for Physical Sciences at Microscale, University of Science and Technology of China, Hefei, 230026 (China); Yu Hanqing, E-mail: hqyu@ustc.edu.cn [Advanced Lab for Environmental Research and Technology, USTC-CityU, Suzhou, 215123 (China); Department of Chemistry, University of Science and Technology of China, Hefei, 230026 (China)

    2009-11-15

    Water hyacinth roots were employed as a biosorbent to remove Cu(II) in aqueous media. Nitrogen adsorption/desorption analysis revealed that the biosorbent was mesoporous with a relatively small surface area. Equilibrium biosorption isotherms showed that the water hyacinth roots possessed a high affinity and sorption capacity for Cu(II) with a monolayer sorption capacity of 22.7 mg g{sup -1} at initial pH 5.5. Kinetics study at different temperatures revealed that the sorption was a rapid and endothermic process. The activation energy for Cu(II) sorption was estimated to be 30.8 kJ mol{sup -1}, which is typical of activated chemisorption processes. The sorption mechanism was investigated by Fourier transform infrared spectroscopy, X-ray photoelectron spectroscopy, effect of pH and calcium release. These analyses suggested that the biosorption mainly involved the ion exchange of Cu(II) with cations and complex formation with functional groups on the surface of the roots. All the results showed that water hyacinth roots are an alternative low-cost biosorbent for the removal of Cu(II) from aqueous media.

  2. A Comparative Study of the Purification of Aquaculture Wastewater Using Water Hyacinth, Water Lettuce And Parrot's Feather

    Directory of Open Access Journals (Sweden)

    A. M. Snow

    2008-01-01

    Full Text Available Water hyacinth, water lettuce and parrot’s feather plants were examined for their ability to remove nutrients from aquaculture wastewater at two retention times. During the experiment, the aquatic plants grew rapidly and appeared healthy with green color. At hydraulic retention times (HRTs of 6 and 12 days, the average water hyacinth, water lettuce and parrot’s feather yields were 83, 51 and 51 g (dm m-2 and 49, 29 and 22 g (dm m-2, respectively. The aquatic plants were able to significantly reduce the pollution load of the aquaculture wastewater. The TS, COD, NH4+-N, NO2--N, NO3--N and PO43--P reductions ranged from 21.4 to 48.0%, from 71.1 to 89.5%, from 55.9 to 76.0%, from 49.6 to 90.6%, from 34.5 to 54.4% and from 64.5 to 76.8%, respectively. Generally, the reductions increased with longer retention times and were highest in compartments containing water hyacinth followed by compartments containing water lettuce and parrot’s feather. In terms of COD, NO3--N and PO43--P, the effluent leaving the hydroponics system was suitable for reuse in aquaculture. However, the effluent had slightly high levels of TS, NH3-N, NO2--N and pH after treatment.

  3. Classification, mode of action and production strategy of xylanase and its application for biofuel production from water hyacinth.

    Science.gov (United States)

    Uday, Uma Shankar Prasad; Choudhury, Payel; Bandyopadhyay, Tarun Kanti; Bhunia, Biswanath

    2016-01-01

    Xylanases are classified under glycoside hydrolase families which represent one of the largest groups of commercial enzymes. Depolymerizing xylan molecules into monomeric pentose units involves the synergistic action of mainly two key enzymes which are endo-β-xylanase and β-xylosidase. Xylanases are different with respect to their mode of action, substrate specificities, biochemical properties, 3D structure and are widely produced by a spectrum of bacteria and fungi. Currently, large scale production of xylanase can be produced through the application of genetic engineering tool which allow fast identification of novel xylanase genes and their genetic variations makes it an ideal enzymes. Due to depletion of fossil fuel, there is urgent need to find out environment friendly and sustainable energy sources. Therefore, utilisation of cheap lignocellulosic materials along with proper optimisation of process is most important for cost efficient ethanol production. Among, various types of lignocellulosic substances, water hyacinth, a noxious aquatic weed, has been found in many tropical. Therefore, the technological development for biofuel production from water hyacinth is becoming commercially worthwhile. In this review, the classification and mode of action of xylanase including genetic regulation and strategy for robust xylanase production have been critically discussed from recent reports. In addition various strategies for cost effective biofuel production from water hyacinth including chimeric proteins design has also been critically evaluated.

  4. "Scripta manent" on meie regioonis ainulaadne üritus / Sirje Kriisa, Lennart Mänd, Rene Haljasmäe...[jt.] ; üles kirjutanud Reet Varblane

    Index Scriptorium Estoniae

    2005-01-01

    Kuni 2. X Eesti Tarbekunsti- ja Disainimuuseumis avatud rahvusvahelisest köitekunstinäitusest "Scripta manent III. Maailma parim asi". Köitekunstist kõnelesid näituse korralduskomitee liikmed. Žürii koosseis. Kuldraamatud pälvisid Külli Grünbach-Sein, Kaire Olt ja Jaana Päeva. Näituse korralduskomitees ka Tulvi-Hanneli Turo ja Rene Haljasmäe TLÜARist

  5. "Scripta manent" on meie regioonis ainulaadne üritus / Sirje Kriisa, Lennart Mänd, Rene Haljasmäe...[jt.] ; üles kirjutanud Reet Varblane

    Index Scriptorium Estoniae

    2005-01-01

    Kuni 2. X Eesti Tarbekunsti- ja Disainimuuseumis avatud rahvusvahelisest köitekunstinäitusest "Scripta manent III. Maailma parim asi". Köitekunstist kõnelesid näituse korralduskomitee liikmed. Žürii koosseis. Kuldraamatud pälvisid Külli Grünbach-Sein, Kaire Olt ja Jaana Päeva. Näituse korralduskomitees ka Tulvi-Hanneli Turo ja Rene Haljasmäe TLÜARist

  6. Effect of the application of water hyacinth compost/vermicompost on the growth and flowering of Crossandra undulaefolia, and on several vegetables.

    Science.gov (United States)

    Gajalakshmi, S; Abbasi, S A

    2002-11-01

    The impact of the application of compost/vermicompost obtained from water hyacinth (Eichhornia crassipes, Mart. Solms) on plants was assessed in terms of growth and flowering of the angiosperm crossandra (Crossandra undulaefolia). Overall nine morphological, size, and yield attributes were studied in crossandra saplings raised on water hyacinth compost or vermicompost as compared to the untreated saplings. Application of vermicompost led to statistically significant improvement in the growth and flowering of crossandra compared to the untreated plants. The impact of compost was also beneficial but a little less distinct than the positive impact of vermicompost. Qualitative studies were simultaneously conducted in five kitchen gardens owned by farmers near Pondicherry. In three of these locations water hyacinth vermicompost was applied-and no other fertilizer-for months to different species of vegetables. Water hyacinth compost was similarly applied in another two locations. In all the locations no adverse effect on any of the plant species was observed. We believe these studies would help in dispelling the apprehension of farmers that compost/vermicompost obtained form a pernicious weed like water hyacinth may have deleterious effect on other plants.

  7. Bioethanol production from sodium hydroxide/hydrogen peroxide-pretreated water hyacinth via simultaneous saccharification and fermentation with a newly isolated thermotolerant Kluyveromyces marxianu strain.

    Science.gov (United States)

    Yan, Jinping; Wei, Zhilei; Wang, Qiaoping; He, Manman; Li, Shumei; Irbis, Chagan

    2015-10-01

    In this study, bioethanol production from NaOH/H2O2-pretreated water hyacinth was investigated. Pretreatment of water hyacinth with 1.5% (v/v) H2O2 and 3% (w/v) NaOH at 25 °C increased the production of reducing sugars (223.53 mg/g dry) and decreased the cellulose crystallinity (12.18%), compared with 48.67 mg/g dry and 22.80% in the untreated sample, respectively. The newly isolated Kluyveromyces marxianu K213 showed greater ethanol production from glucose (0.43 g/g glucose) at 45 °C than did the control Saccharomyces cerevisiae angel yeast. The maximum ethanol concentration (7.34 g/L) achieved with K. marxianu K213 by simultaneous saccharification and fermentation (SSF) from pretreated water hyacinth at 42 °C was 1.78-fold greater than that produced by angel yeast S. cerevisiae at 30 °C. The present work demonstrates that bioethanol production achieved via SSF of NaOH/H2O2-pretreated water hyacinth with K. marxianu K213 is a promising strategy to utilize water hyacinth biomass.

  8. NUTRITIONAL EFFECTIVENESS OF WATER HYACINTH LEAVES COMBINED WITH WHEAT BRAN AND COTTON SEED CAKE ON THE PERFORMANCE OF NILE TILAPIA (OREOCHROMIS NILOTICUS

    Directory of Open Access Journals (Sweden)

    H.M. ADAM SULIEMAN

    2011-11-01

    Full Text Available The aim of this study to evaluate the different levels of water hyacinth plant leaves in the diet of Nile Tilapia and their effect on growth performance so as to eliminate the water hyacinth plant from the Nile and provide a cheap food for fish. In this experiment the dried water hyacinth leaves (Eicchornia crassipse, wheat bran and cotton seed cake were used in different ratio to formulate two experimental diets (A and B. Diet (A contains 70% wheat bran, 20% cotton seed cake and 10% water hyacinth leaves, while diet (B contains 65%, 20% cottons seed cake and 15% water hyacinth leaves. These diets were fed to studied fish with 5% per their body weight for 105 days. The results of this study revealed that the diet (A has higher growth performance on studied fish than those fed on diet (B. The results of food conversion ratio (FCR, 4.04 in diet (A and food conversion ratio (FCR, 5.73 in diet (B, and the increment of growth rate in fish fed with diet (A more efficient on the growth performance of studied fish than diet (B except in the case of protein efficiency rate (PER it's found to be more in diet (A than diet (B. It was concluded that the diet (A had better growth performance than diet (B on the feeding regime of Nile tilapia (Oreochromis niloticus.

  9. The valorization of water hyacinth for energy production; La valorisation de la jacinthe d'eau pour la production d'energie

    Energy Technology Data Exchange (ETDEWEB)

    Musalu, W.K.S. [Congo Ministry of Energy (Congo)

    2005-06-01

    The hydroelectric potential in the Democratic Republic of Congo is evaluated at 774,000 GWh which represents 35 per cent of all central Africa. Although the country has significant water resources, one of the main problems with its waterways is the invasion of water hyacinth, an aquatic plant that floats at the water surface. This very rapid growing plant which originates from the Amazon region in Latin America is extremely abundant in the Congo because of the important water network. The plant blocks irrigation canals, water pipes and hydroelectric installations. This study examined the feasibility of using this plant to help generate power in a country that has desperate need for electricity, particularly in its rural regions. An experimental study was conducted in which water hyacinth was composted to produce methane for power generation. In addition to producing significant quantities of biogas, composted water hyacinth also produces an organic material that can significantly enrich agricultural soils. The study showed that 10 cubic metres of agricultural wastes comprised of a mixture of swine manure, brewery sludge and water hyacinth can produce enough biogas to generate 2,500 kWh of electricity per day. This study confirmed that an economic value can be given to water hyacinth because it represents a large percentage of the material required to produce biogas. 5 refs., 1 tab., 1 fig.

  10. Dwarfing Effect of Paclobutrazol on Hydroponic Hyacinth%多效唑对水培风信子矮化作用研究

    Institute of Scientific and Technical Information of China (English)

    2013-01-01

    The foliage of hydroponic hyacinth was treated with paclobutrazol of different concentrations. Results showed that the treatment of 150~250 mg/L was effective in reducing the height of the hydroponic hyacinth, but the number and ornamental period of blossom were influenced. The combined effect of 200 mg/L paclobutrazol on hydroponic hyacinth was the best.%  试验采用不同浓度多效唑(150 mg/L、200 mg/L、250 mg/L)喷施水培风信子叶面。结果表明,150~250 mg/L多效唑均可使水培风信子矮化,但影响开花的数目和花朵的可供观赏时间。其中200 mg/L多效唑处理对水培风信子的综合效应最佳。

  11. Evaluating the performance of the newly-launched Landsat 8 sensor in detecting and mapping the spatial configuration of water hyacinth (Eichhornia crassipes) in inland lakes, Zimbabwe

    Science.gov (United States)

    Dube, Timothy; Mutanga, Onisimo; Sibanda, Mbulisi; Bangamwabo, Victor; Shoko, Cletah

    2017-08-01

    The remote sensing of freshwater resources is increasingly becoming important, due to increased patterns of water use and the current or projected impacts of climate change and the rapid invasion by lethal water weeds. This study therefore sought to explore the potential of the recently-launched Landsat 8 OLI/TIRS sensor in mapping invasive species in inland lakes. Specifically, the study compares the performance of the newly-launched Landsat 8 sensor, with more advanced sensor design and image acquisition approach to the traditional Landsat-7 ETM+ in detecting and mapping the water hyacinth (Eichhornia crassipes) invasive species across Lake Chivero, in Zimbabwe. The analysis of variance test was used to identify windows of spectral separability between water hyacinth and other land cover types. The results showed that portions of the visible (B3), NIR (B4), as well as the shortwave bands (Band 8, 9 and 10) of both Landsat 8 OLI and Landsat 7 ETM, exhibited windows of separability between water hyacinth and other land cover types. It was also observed that on the use of Landsat 8 OLI produced high overall classification accuracy of 72%, when compared Landsat 7 ETM, which yielded lower accuracy of 57%. Water hyacinth had optimal accuracies (i.e. 92%), when compared to other land cover types, based on Landsat 8 OLI data. However, when using Landsat 7 ETM data, classification accuracies of water hyacinth were relatively lower (i.e. 67%), when compared to other land cover types (i.e. water with accuracy of 100%). Spectral curves of the old, intermediate and the young water hyacinth in Lake Chivero based on: (a) Landsat 8 OLI, and (b) Landsat 7 ETM were derived. Overall, the findings of this study underscores the relevance of the new generation multispectral sensors in providing primary data-source required for mapping the spatial distribution, and even configuration of water weeds at lower or no cost over time and space.

  12. The Purification and Rapid Identification of Heavy Metal-binding Peptides of Water Hyacinth

    Institute of Scientific and Technical Information of China (English)

    丁翔; 王文清; 姜剑; 茹炳根; 王英彦

    1994-01-01

    This paper studies the rapid identification of heavy metal-binding peptides (phytochelatin) by taking Water Hyacinth as a model plant. Plants were cultured in water containing 2 μg/ml Cd2+ for 13 days. The Sephadex G-50 chromatography of root extract under low salt concentration (0. 01 mol/L PBS) gave a Cd-binding peak with MW of 10 ,000 determined by SEC HPLC. After oxidation with performic acid, its SEC HPLC molecular weight decreased to below 1300 and the reverse phase HPLC showed one peptide peak, whose amino acid composition is the same as that of the sample never undertaking oxidation, and (Glu/Gln):Cys:Gly=2:2:1. According to the general structure of phytochelatin (γ-Glu-Cys)n-Gly, n is 2 in this case. The protocol including the sequential steps of Sephadex G-50 chromatography→performic acid oxidation→reverse phase HPLC→amino acid analysis is a rapid and effective method to identify the existence of phytochelatin and determine its values of n.

  13. Effect of Briquetting Process Variables on Hygroscopic Property of Water Hyacinth Briquettes

    Directory of Open Access Journals (Sweden)

    R. M. Davies

    2013-01-01

    Full Text Available The knowledge of water resistance capacity of briquettes is important in order to determine how sensitive the produced briquettes are to moisture change during storage. The relative changes in length and diameter of briquettes during immersion in water for 6 hours were investigated. This was conducted to determine hygroscopic property of produced briquettes under process variables levels of binder (10, 20, 30, 40, and 50% by weight of residue, compaction pressure (3.0, 5.0, 7.0, and 9.0 MPa and particle size (0.5, 1.6, and 4 mm of dried and ground water hyacinth. Data was statistically analysed using Analysis of Variance, the Duncan Multiple Range Test, and descriptive statistics. The relative change in length of briquettes with process variables ranged significantly from % to % (binder, % to % (compaction pressure, and % to % (particle size (. Furthermore, the relative change in diameter of briquettes with binder, compaction pressure, and particle size varied significantly from % to %, % to %, and % to %, respectively (. This study suggests optimum process variables required to produce briquettes of high water resistance capacity for humid environments like the Niger Delta, Nigeria, as 50% (binder proportion, 9 MPa (compaction pressure, and 0.5 mm (particle size.

  14. Dielectric spectroscopic studies on the water hyacinth plant collected from agriculture drainage

    Science.gov (United States)

    Mahani, Ragab; Atia, Fatma; Al Neklawy, Mohammed M.; Fahem, Amin

    2016-06-01

    The present paper aims to investigate the sensitivity of dielectric spectroscopy to changes in concentrations of pollutants (heavy metals and metal oxides) uptake by the water hyacinth plant collected from agriculture wastewater drainage. The measurements were carried out on the dried root and shoot plant parts before and after subjecting to different microwave heating powers for different times. Dielectric properties of the untreated root were investigated at temperature range (30-90 °C). X-ray fluorescence spectroscopy (XRF) results showed that the concentration of metals and metals oxides are higher in plant root than in plant shoot. Accordingly, the obtained dielectric properties were found to depend on the applied electric field frequency, magnitude of heating power as well as concentrations of pollutants. Analysis of experimental data represented by the imaginary part of the dielectric modulus M″ (ω) revealed to the presence of three different relaxation processes. The lower frequency relaxation process was associated to charge carriers conduction whereas those appeared at higher frequencies were associated to different types of interfacial polarization. The plant ability for removing heavy metals and metal oxides from the aquatic environments would be enhanced upon subjecting to microwave heating power with 400 W for 30 min.

  15. Assessing water hyacinth (Eichhornia crassopes) and lettuce (Pistia stratiotes) effectiveness in aquaculture wastewater treatment.

    Science.gov (United States)

    Akinbile, C O; Yusoff, Mohd S

    2012-03-01

    Water hyacinth (Eichhornia crassipes) and water lettuce (Pistia stratiotes) were analyzed to determine their effectiveness in aquaculture wastewater treatment in Malaysia. Wastewater from fish farm in Semanggol Perak, Malaysia was sampled and the parameters determined included, the pH, turbidity, dissolved oxygen (DO), chemical oxygen demand (COD), biochemical oxygen demand (BOD), nitrite phosphate (PO4(3-)), nitrate (NO(3-)), nitrite (NO(-2)), ammonia (NH3), and total kjedahl nitrogen (TKN). Also, hydroponics system was set up and was added with fresh plants weights of 150 +/- 20 grams Eichhornia crassipes and 50 +/- 10 grams Pistia stratiotes during the 30 days experiment. The phytoremediation treatment with Eichhornia crassipes had pH ranging from 5.52 to 5.59 and from 4.45 to 5.5 while Pistia stratiotes had its pH value from 5.76 to 6.49 and from 6.24 to 7.07. Considerable percentage reduction was observed in all the parameters treated with the phytoremediators. Percentage reduction of turbidity for Eichhornia crassipes were 85.26% and 87.05% while Pistia stratiotes were 92.70% and 93.69% respectively. Similar reductions were observed in COD, TKN, NO(3-), NH3, and PO4(3-). The capability of these plants in removing nutrients was established from the study. Removal of aquatic macrophytes from water bodies is recommended for efficient water purification.

  16. Ulcerative dermatitis and valvular endocarditis associated with Staphylococcus aureus in a hyacinth macaw (Anadorhynchus hyacinthinus).

    Science.gov (United States)

    Huynh, Minh; Carnaccini, Silvia; Driggers, Todd; Shivaprasad, H L

    2014-06-01

    An 18-yr-old male hyacinth macaw (Anadorhynchus hyacinthinus) was found dead in his aviary with no preexisting signs. The bird had a chronic history of feather damaging behavior, with severe ulcerative dermatitis. Pathologic findings revealed a vegetative valvular endocarditis, myocarditis, septicemia, chronic severe glomerulonephritis, and thyroid dysplasia. Staphylococcus aureus was isolated from the valve, the liver, and the skin. Repeated trauma and low-rate bacteriemia may have contributed to the development of endocarditis. Translocation of S. aureus skin infection in the bloodstream may lead to subacute endocarditis in humans and such mechanism is suspected in this case. This case suggests that endocarditis associated with S. aureus septicemia is a potential complication of feather damaging behavior. This case also reports a systemic complication of ulcerative dermatitis secondary to feather damaging behavior. Endocarditis has been poorly reported in psittacine species, and such medical complication of feather damaging behavior has never been reported to our knowledge. Furthermore, S. aureus is a bacteria of public health concern and should be integrated into the differential when pet parrots with dermatitis are in proximity to owners.

  17. Statistical optimization of FPase production from water hyacinth using Rhizopus oryzea PR 7

    Directory of Open Access Journals (Sweden)

    Moumita Karmakar

    2011-04-01

    Full Text Available Pretreated water hyacinth was used as sole carbon source for the production of cellulase enzyme by Rhizopus oryzae PR 7 MTCC 9642 in both liquid state (LSF and solid state fermentation (SSF that was measured by the FPase activity. To maximize the FPase production, the critical parameters like substrate concentration, cultivation temperature and pH on enzyme production were optimized using response surface methodology using Central Composite Design (CCD. The LSF was found to be better than SSF for the production of FPase. The best preferred combination for highest FPase activity from LSF was with substrate concentration 1.25%,pH 7.32 and temperature 25.25°C. Estimated optimum conditions for FPase production from SSF was a combination of substrate concentration of 0.5%, pH 6, temperature 18°C. Under the optimized cultivation condition, the strain synthesized 123 U/ml and 48U/ml FPase from LSF and SSF respectively and the highest production was achieved within only 48 hours of cultivation.

  18. Metaphase I orientation of Robertsonian trivalents in the water-hyacinth grasshopper, Cornops aquaticum (Acrididae, Orthoptera

    Directory of Open Access Journals (Sweden)

    Pablo César Colombo

    2009-01-01

    Full Text Available Trivalents resulting from polymorphic Robertsonian rearrangements must have a regular orientation in metaphase I if the polymorphisms are to be maintained. It has been argued that redistribution of proximal and interstitial chiasmata to more distal positions is necessary for a convergent orientation, the only one that produces viable gametes. Cornops aquaticum is a South-American grasshopper that lives and feeds on water-hyacinths, and has three polymorphic Robertsonian rearrangements in its southernmost distribution area in Central Argentina and Uruguay. The orientation of trivalents in metaphase I, the formation of abnormal spermatids and the frequency and position of chiasmata in the trivalents, was analysed in a polymorphic population of C. aquaticus. In this study we observed a correlation between the number of trivalents with the frequency of abnormal spermatids; additionally, the number of chiasmata, especially proximal and interstitial ones, was strongly correlated with the frequency of the linear orientation. Therefore we confirmed our previous assumption, based on other evidence, that the chiasmata redistribution in fusion carriers is essential to the maintenance of the polymorphisms.

  19. Ensilaging Water Hyacinth: Effects of Water Hyacinth Compound Silage on the Performance of Goats%水葫芦青贮条件及水葫芦复合青贮对山羊生产性能的影响

    Institute of Scientific and Technical Information of China (English)

    白云峰; 周卫星; 严少华; 刘建; 张浩; 蒋磊

    2011-01-01

    本试验旨在建立合理的水葫芦青贮方法及调查水葫芦复合青贮对羊生产性能的影响.通过调整干物质含量、底物(稻草、醋糟、麦麸)及添加剂(糖蜜、玉米粉)组合,对水葫芦进行了14种青贮处理,以稻草醋糟复合青贮为对照,青贮后进行感官评定和营养成分分析,从中选取3种水葫芦复合青贮.选用180日龄山羊(波尔山羊×徐淮山羊)20只,随机分为4组,每组5只,试验组分别以选出的3种水葫芦复合青贮为粗饲料,对照组以玉米青贮为粗饲料,饲喂40 d后测定山羊生产性能变化.结果表明:1)通过与底物组合,水葫芦在无外源添加剂的情况下能够自然发酵成功;水葫芦经挤压脱水后,与玉米粉、醋糟复合青贮所得产物的pH最低,需时最短.2)水葫芦经过挤压脱水仍保持较高的营养价值,该处理能够提高其在山羊全混合日粮(TMR)中添加比例,可达到73.16%.3)饲喂水葫芦复合青贮的山羊的采食量为2 152 g/d、平均日增重为122g/d、饲料转化效率为6.6.结果提示,将水葫芦挤压脱水与其他底物、添加剂复合青贮发酵作为粗饲料用于山羊,可达到中等以上生产水平.%The trial was conducted to establish a feasible method for water hyacinth silage and to investigate the effects of water hyacinth compound silage on the performance of goats. Fourteen treatments of water hyacinth compound silage were assorted according to the adjustment of dry matter contents, substrates ( rice straw, vinegar dreg and wheat bran), and additives ( molasses and corn power), and compound silage of rice straw and vinegar dreg was used as the control. Three treatments of water hyacinth compound silage were selected after organoleptic investigation and nutrient components analysis. Twenty goats (Boer goats x Xuhuai goats) of l80 days old were allotted into four groups with five replicates in each. The three selected compound silages were used as the roughages in the

  20. ANTHROPOLOGICAL INTENTION OF PHILOSOPHIZING OF RENE DESCARTES AND ITS MANIFESTATION IN THE TEXT «THE RULES»

    Directory of Open Access Journals (Sweden)

    Anatolii Malivskyi

    2015-12-01

    Full Text Available Purpose. Based on the understanding of The New Time philosophy as a response to the challenges of the era in relation to the construction of an objective picture of the world and the self-creation of man, to analyze the main options for evaluating the ambivalence of the basic intention of the philosophy of Descartes in the research literature and to clarify the nature of ambiguity. To justify the dominant nature of anthropological intention in the text of the «Rules for Guiding the Mind in Searching for the Truth». Novelty. The nature of the ambivalence of the basic intention of the text of the "Rules" is clarified as a form of two basic existences, opposite to the New Time, namely the query on the objectivity of scientific knowledge and inquiry in anthropology as a cornerstone of philosophy. The author of the article proves the domination of anthropological component of the text «The Rules» in front of scientific knowledge. Conclusions. The main manifestations of ambivalence of basic directivity of philosophizing of Rene Descartes to construction of an objective picture of the world and self-creation of person were described. The determining influence on the process of the establishment of basic intention of the specificity of the experience of mathematical knowledge and Plato’s and Aristotle’s tradition of philosophizing for the first, and of personal tradition of Christianity in the second place was emphasized. In the reference to the text «The Rules» of Descartes the ambiguity of the basic direction was argued, the nature and domination of the anthropological intention were justified.

  1. The effect of microstructure, temperature, and hold-time on low-cycle fatigue of As HIP P/M Rene 95

    Science.gov (United States)

    Bashir, S.; Antolovich, S. D.

    1984-01-01

    The effects of microstructure, temperature, plastic strain range, and hold time on the low-cycle fatigue (LCF) life were studied for Rene 95, an important Ni base superalloy used in jet engine disks. It was shown that the life could be varied by approximately an order of magnitude at elevated temperatures by simple heat treatments. The life was largest for the microstructure that promoted the most homogeneous deformation mode. The results are explained using the concept of a synergistic interaction between the deformation mode and boundary oxidation.

  2. The effect of microstructure, temperature, and hold-time on low-cycle fatigue of As HIP P/M Rene 95

    Science.gov (United States)

    Bashir, S.; Antolovich, S. D.

    1984-01-01

    The effects of microstructure, temperature, plastic strain range, and hold time on the low-cycle fatigue (LCF) life were studied for Rene 95, an important Ni base superalloy used in jet engine disks. It was shown that the life could be varied by approximately an order of magnitude at elevated temperatures by simple heat treatments. The life was largest for the microstructure that promoted the most homogeneous deformation mode. The results are explained using the concept of a synergistic interaction between the deformation mode and boundary oxidation.

  3. Adaptability of two weevils (Neochetina bruchi and Neochetina eichhorniae) with potential to control water hyacinth in the Rift Valley of Ethiopia

    NARCIS (Netherlands)

    Firehun, Y.; Struik, P.C.; Lantinga, E.A.; Taye, T.

    2015-01-01

    Neochetina weevils have potential as biocontrol agents for water hyacinth, an aquatic weed which seriously affects irrigation water supply in sugarcane, vegetables and other horticultural crop production in the Rift Valley of Ethiopia. A study was conducted on (i) the adaptability and duration of de

  4. Agrobotanical attributes, nitrogen-fixation, enzyme activities and nutraceuticals and tyrosinase enzyme of hyacinth bean (Lablab purpureus L.) - a bio-functional medicinal legume.

    Science.gov (United States)

    Hyacinth bean (Lablab purpureus L.) accessions of different origins received from USDA, ARS, Plant Genetic Resources Conservation Unit, Griffin, GA, U.S.A. were evaluated for agrobotanical attributes, enzyme activities, nutraceuticals and quality in pot culture at AMU, Aligarh, Uttar Pradesh. Fresh ...

  5. A Novel Biosorbent, Water-Hyacinth, Uptaking Methylene Blue from Aqueous Solution: Kinetics and Equilibrium Studies

    Directory of Open Access Journals (Sweden)

    Md. Nasir Uddin

    2014-01-01

    Full Text Available The adsorption of MB dye from aqueous solution onto HCl acid treated water-hyacinth (H-WH was investigated by carried out batch sorption experiments. The effect of process parameters such as pH, adsorbent dosage, concentrations and contact time, and ionic strength were studied. Adsorption of MB onto H-WH was found highly pH dependent and ionic strength shows negative impact on MB removal. To predict the biosorption isotherms and to determine the characteristic parameters for process design, Langmuir, Freundlich, Temkin, and Halsey isotherms models were utilized to equilibrium data. The adsorption kinetics was tested for pseudo-first-order (PFO, pseudo-second-order (PSO, intraparticle diffusion (IPD, and Bangham’s kinetic models. The Langmuir isotherm model showed the goodness-of-fit among the tested models for equilibrium adsorption of MB over H-WH and indicated the maximum adsorption capacity as 63.30 mg/g. Higher coefficient of determination (R2>0.99 and better agreement between the qe (experimental and qe (calculated values predicted that PSO kinetic model showed the goodness-of-fit for kinetic data along with rate constant 1.66×10-3, 4.42×10-3, and 3.57×10-3 mg·g-1min⁡-1/2⁡, respectively, for the studied concentration range. At the initial stage of adsorption, the overall rate of dye uptake was found to be dominated by external mass transfer, and afterwards, it is controlled by IPD mechanism.

  6. Contribution of water hyacinth (Eichhornia crassipes (Mart.) Solms) grown under different nutrient conditions to Fe-removal mechanisms in constructed wetlands.

    Science.gov (United States)

    Jayaweera, Mahesh W; Kasturiarachchi, Jagath C; Kularatne, Ranil K A; Wijeyekoon, Suren L J

    2008-05-01

    Severe contamination of water resources including groundwater with iron (Fe) due to various anthropogenic activities has been a major environmental problem in industrial areas of Sri Lanka. Hence, the use of the obnoxious weed, water hyacinth (Eichhornia crassipes (Mart.) Solms) in constructed wetlands (floating aquatic macrophyte-based plant treatment systems) to phytoremediate Fe-rich wastewaters seems to be an appealing option. Although several studies have documented that hyacinths are good metal-accumulating plants none of these studies have documented the ability of this plant grown under different nutrient conditions to remove heavy metals from wastewaters. This paper, therefore, reports the phytoremediation efficiencies of water hyacinth grown under different nutrient conditions for Fe-rich wastewaters in batch-type constructed wetlands. This study was conducted for 15 weeks after 1-week acclimatization by culturing young water hyacinth plants (average height of 20+/-2cm) in 590L capacity fiberglass tanks under different nutrient concentrations of 1-fold [28 and 7.7mg/L of total nitrogen (TN) and total phosphorous (TP), respectively], 2-fold, 1/2-fold, 1/4-fold and 1/8-fold with synthetic wastewaters containing 9.27Femg/L. Another set-up of hyacinths containing only Fe as a heavy metal but without any nutrients (i.e., 0-fold) was also studied. A mass balance was carried out to investigate the phytoremediation efficiencies and to determine the different mechanisms governing Fe removal from the wastewaters. Fe removal was largely due to phytoremediation mainly through the process of rhizofiltration and chemical precipitation of Fe2O3 and FeOH3 followed by flocculation and sedimentation. However, chemical precipitation was more significant especially during the first 3 weeks of the study. Plants grown in the 0-fold set-up showed the highest phytoremediation efficiency of 47% during optimum growth at the 6th week with a highest accumulation of 6707Femg/kg dry

  7. Korrosionshastigheder af rene zinkcoatings

    DEFF Research Database (Denmark)

    Bech-Nielsen, G.; Tang, Peter Torben; Ulrich, Dan

    1991-01-01

    Det har længe været den fremherskende opfattelse i galvanobranchen, at et zinkbad var et zinkbad og at der, tiltrods for de forskellige leverandørers gyldne løfter, ikke var den store forskel på de bade der kan købes på markedet idag. Det har ydermere været den almindelige opfattelse, at zinkbade......-bestandighed og udseende. Badenes alder har også vist sig at have endog meget stor betydning for kvaliteten af belægningerne....

  8. Rene og beskidte bomber

    DEFF Research Database (Denmark)

    Pedersen, Jens Olaf Pepke

    2011-01-01

    Nedrustning. Bør vi ikke være mere bekymrede i dag, hvor færre våben bliver fordelt på flere og mere uforudsigelige lande? Her ser vi på, hvad der konkret skal til for at fremstille atombomber med henholdsvis plutonium og beriget uran.......Nedrustning. Bør vi ikke være mere bekymrede i dag, hvor færre våben bliver fordelt på flere og mere uforudsigelige lande? Her ser vi på, hvad der konkret skal til for at fremstille atombomber med henholdsvis plutonium og beriget uran....

  9. Biogas production using water hyacinths to meet collective energy needs in a sahelian country

    Directory of Open Access Journals (Sweden)

    O. Almoustapha

    2009-01-01

    Full Text Available This paper presents a pilot project that investigates the possibility of producing biogas from a mixture of water hyacinth and fresh rumen residue – replacing firewood as a source of fuel – to meet the energy needs of a maternity facility in Niamey (Niger. The discontinuous-type installation (batch reactors is made up of six digesters measuring 5 m3 each. The output during hot and cool seasons, 0.52 m3 and 0.29 m3 respectively of biogas per m3 of digester per day, has met the energy needs of the maternity facility, estimated at 8 m3 of biogas per day. The study revealed strong seasonal variations: output during the hot season is approximatively 1.8 times greater than it is during the cool season. Large quantities of water hyacinth, an invasive plant present in Niger since 1986, are manually harvested in aquatic environments. The project is run by a local NGO, the Groupe d’Initiative pour les Energies Renouvelables (GIER, and supported by UNICEF and the Niger Basin Authority. The duration of the project is 8 months.Ce papier présente un projet pilote vérifiant la possibilité de produire du biogaz à partir d’un mélange de jacinthe d’eau et de résidu frais de rumen, en substitution au bois de chauffe pour satisfaire aux besoins en énergie d’une maternité de Niamey (Niger. L’installation de type discontinu (réacteurs batch est composée de six digesteurs de 5 m3. Les rendements en saison chaude et en saison fraîche, respectivement 0,52 et de 0,29 m3 de biogaz par m3 de digesteur par jour et ont permis de couvrir les besoins de la maternité évalués à 8 m3 de biogaz par jour. L’étude révèle une forte variation saisonnière : le rendement en saison chaude est d’environ 1,8 fois supérieur à celle de la saison fraîche. La jacinthe d’eau est une plante envahissante présente au Niger depuis 1986, dont des quantités importantes sont récoltées en  milieux aquatiques. Le projet est porté par une ONG locale, le

  10. Microstructures and Mechanism of Cracks Forming of Rene 80 High-Temperature Alloy Fabricated by Laser Rapid Forming Process%激光快速成形Rene80高温合金组织及裂纹形成机理

    Institute of Scientific and Technical Information of China (English)

    席明哲; 高士友

    2012-01-01

    研究了激光快速成形(LRF)Rene 80高温合金厚壁件的凝固组织和裂纹的形成机理.结果表明,激光快速成形Rene 80高温合金的凝固组织为与沉积高度方向平行的定向凝固枝晶组织,由于凝固偏析,MC型碳化物和γ-γ′共晶组织分布于定向凝固组织的枝晶间区域.激光快速成形Rene 80高温合金厚壁件含有许多长度大于10 mm,扩展方向与沉积高度方向平行的宏观裂纹.分析表明,这些裂纹为液化裂纹,其形成原因为:激光快速成形时,紧邻激光熔池的热影响区(HAZ)内沿晶界分布的低熔点γ-γ′共晶组织发生熔化,形成热影响区内沿晶界扩展的晶界液相,在热影响区冷却过程中,由于热影响区内固相的收缩应力作用,沿晶界扩展的固-液界面被撕开,从而导致液化裂纹的产生.%The microstructures and mechanism, of cracks forming of a thick-wall part of Rene 80 superalloy fabricated by laser rapid forming (LRF) process are presented. Results show that the solidified microstructures of LRF Rene 80 high-temperature alloy consist of directionally solidified dendrites, which are parallel with the deposition direction. The MC type carbides and γ — γ' eutectic distribute in interdendritic region of the directionally solidified microstructure due to element segregation. The LRF Rene 80 high-temperature alloy thick-wall part contains many macro cracks, which have the length of more than 10 mm and expand along the direction parallel to the deposition direction. Analyses indicate that these macro cracks are liquated cracks. During LRF process, the γ—γ' eutectic with lower melting point particularly along the grain-boundary regions in heat-affected zone (HAZ) melt produced by laser melting pool and result in the formation of grain-boundary liquid. On the subsequent cooling process of the HAZ, the liquated cracks along the HAZ grain boundaries occurred by decohesion across the liquid-solid interface due to

  11. Structural and ecophysiological alterations of the water hyacinth [Eichhornia crassipes (Mart. Solms] due to anthropogenic stress in Brazilian rivers

    Directory of Open Access Journals (Sweden)

    Angela Pierre Vitória

    2011-10-01

    Full Text Available In this work, the structural and ecophysiological alterations (chlorophyll a fluorescence and photosynthetic pigments, and quantification of Cr, Pb and Zn in the leaf limb, petiole and younger and older roots of water hyacinth from the lower, medium and upper Paraíba do Sul river (PSR and Imbé river were evaluated. The plants from the medium and upper PSR (more industrialized and populated regions exhibited lower turgid cell in the root cortex, less root hairs and leaf epidermis, chloroplasts with plastoglobules and increased stroma volume. Higher concentrations of metals were observed in the younger and older roots from the medium PSR plants. The results suggested that the plants from more anthropized regions were able to maintain the maximum quantum yield (Fv/Fm which was a result from the metabolic fitting, increasing the non-photochemical quenching, reducing total chlorophyll/carotenoids and leading to the structural modifications.

  12. Optimization of Bioethanol Production Using Whole Plant of Water Hyacinth as Substrate in Simultaneous Saccharification and Fermentation Process.

    Science.gov (United States)

    Zhang, Qiuzhuo; Weng, Chen; Huang, Huiqin; Achal, Varenyam; Wang, Duanchao

    2015-01-01

    Water hyacinth was used as substrate for bioethanol production in the present study. Combination of acid pretreatment and enzymatic hydrolysis was the most effective process for sugar production that resulted in the production of 402.93 mg reducing sugar at optimal condition. A regression model was built to optimize the fermentation factors according to response surface method in saccharification and fermentation (SSF) process. The optimized condition for ethanol production by SSF process was fermented at 38.87°C in 81.87 h when inoculated with 6.11 ml yeast, where 1.291 g/L bioethanol was produced. Meanwhile, 1.289 g/L ethanol was produced during experimentation, which showed reliability of presented regression model in this research. The optimization method discussed in the present study leading to relatively high bioethanol production could provide a promising way for Alien Invasive Species with high cellulose content.

  13. Aspects of the scientific network and communication of John Hyacinth de Magellan in Britain, Flanders and France.

    Science.gov (United States)

    Malaquias, Isabel

    2008-11-01

    The subject of gases was on the agenda of many learned scientific gentlemen in the second half of the eighteenth century. This was not only because of the extraordinary account that had been given as to the physical and chemical composition of the third state of matter, but also, and perhaps mainly, because of the extraordinary properties that at least one of these gases seemed to offer for food preservation, the medicinal properties of natural waters and medical applications. These putative practical applications were highly sought after by society at the time, particularly for long-distance sea journeys. This paper focuses on the Portuguese polymath João Jacinto de Magalhães (1722-1790), also known as John Hyacinth de Magellan. It shows some specific aspects of his activities as a disseminator of Priestley's discoveries on pneumatics, mainly in Flanders, Holland and France, and through his large network of scientific correspondents.

  14. Invasive alien species water hyacinth Eichhornia crassipes as abode for macroinvertebrates in hypertrophic Ramsar Site, Lake Xochimilco, Mexico.

    Science.gov (United States)

    Rocha-Ramirez, A; Robles-Valderrama, E; Ramirez-Flores, E

    2014-11-01

    This paper presents information on the density, diversity and functional feeding groups of macroinvertebrate assemblages associated with water hyacinth in Antiguo Canal Cuemanco, part of Lake Xochimilco in Mexico City. Rare (low frequency and density) and dominant (high frequency and density) taxa prevailed in the assemblages, with the most predominant being Hyalella azteca, Chironomus plumosus and Ischnura denticollis. Nonmetric Multidimensional Scaling confirmed two climatic seasons: warm-rainy and cold-dry; the former with the highest diversity and density of taxa. Canonical Correspondence Analysis showed that conductivity, nitrates and turbidity explained the density variations of taxa. Antiguo Canal Cuemanco waters are spatially homogeneous with the characteristics of hypertrophic shallow lakes, inhabited by scrapers and gathering-collectors. The species found were tolerant to organic pollution.

  15. Process optimization for densification of water hyacinth pellets fuel%水葫芦颗粒燃料成型工艺优化

    Institute of Scientific and Technical Information of China (English)

    张霞; 蔡宗寿; 张得政; 张哲

    2016-01-01

    Water hyacinth has been identified as one of the top worst water weeds over the world. Due to its characteristics of rapid growth rate and broad environmental tolerance, it has widely spread in most waterways in 17 provinces of south areas of China since 1930’s. However, water hyacinth has a strong ability to absorb nitrogen, phosphorus and other harmful heavy metal elements from water, so it has been widely used in the projects of ecological rehabilitation of water bodies in recent years over the world, which has made the problem of resource utilization of water hyacinth more important and urgent than before. Because water hyacinth is high in cellulose and hemicellulose content, it has the potential to be transformed into biomass fuel. Using mechanical force, water hyacinth can be extruded or compressed into biomass pellets, and could be an important way to utilize water hyacinth as an energy source. In the process of biomass densification, different chemical compositions of biomass can result in different compressing process parameters of biomass pellets. As an aquatic plant, the difference in the chemical composition of water hyacinth from other terrestrial plants can result in different compressing process parameters of water hyacinth pellets from other biomass pellets. Among all the compressing process parameters of biomass pellets, compressing force, temperature, moisture content and particle size of material are the 4 important process parameters that greatly influence the quality of biomass pellet fuel. In order to improve the densification quality of pellet fuel made from water hyacinth, the densification process of water hyacinth pellets was experimentally studied by using a compressing apparatus in the laboratory. Firstly, the single-factor tests were carried out, in which the variables were compressing force (1.5, 3.0, 4.5, 6.0 and 7.5 kN), temperature (80, 90, 100, 110 and 120℃), moisture content of material (8%, 10%, 12%, 14% and 16%), and

  16. The potential for water hyacinth to improve the quality of Bogota River water in the Muña Reservoir: comparison with the performance of waste stabilization ponds.

    Science.gov (United States)

    Giraldo, E; Garzón, A

    2002-01-01

    The potential application of Water Hyacinth (Eichhornia crassipes) in organic matter degradation, sedimentation, nutrient and heavy metal absorption and sulfur reduction in the Muña Reservoir has been tested in experimental lagoons. The lagoons were operated at hydraulic retention times (HRT) of 6, 9 and 15 days. One lagoon was covered with Water Hyacinth, which is naturally growing in the Muña Reservoir, while another lagoon was operated as a conventional oxidation pond. The Water Hyacinth lagoon had better removal efficiencies for almost all parameters measured: BOD5, total suspended solids, COD, nitrogen, phosphorus and heavy metals. The oxidation lagoon was facultative for HRT of 9 and 15 days, and anoxic when operated at 6 days HRT. At HRT of 15 days the water quality in the effluent of the covered lagoon corresponded to 12 mg/l of BOD, 6 mg/l of suspended solids and 0.8 mg/l of hydrogen sulfide. Hydrogen sulfide levels in the Muña reservoir can be substantially reduced at HRT higher than 15 days in both lagoons. The uncovered lagoon had better hydrogen sulfide removal during the day but presents high levels at night. If the hydraulic retention time in the Muña reservoir is increased, the water quality of the Bogota river can be substantially improved for all the HRTs tested in the pilot units. HRT seems to give a better prediction of overall effluent water quality than surface loading. More research is needed in order to define the optimum water hyacinth density in the Muña reservoir to determine its influence on the water quality of the effluent. The influence is expected to be negative due to an internal increase of BOD, solids, nutrients and metals loads due to plant decay.

  17. Celebrating Two Centuries since the Invention of the Stethoscope. René Théophile Hyacinthe Laënnec (1781-1826).

    Science.gov (United States)

    Tomos, Ioannis; Karakatsani, Anna; Manali, Effrosyni D; Papiris, Spyros A

    2016-10-01

    René Théophile Hyacinthe Laënnec (1781-1826), a French physician, is considered one of the pioneers of respiratory medicine. His contribution to the invention of the stethoscope and to the development of clinical auscultation played a key role in the progress of the diagnosis of chest diseases. Almost two centuries after his invention of the stethoscope, his achievements continue to be widely appreciated and used by modern physicians in current pulmonology.

  18. Analysis of Satellite and Airborne Imagery for Detection of Water Hyacinth and Other Invasive Floating Macrophytes and Tracking of Aquatic Weed Control Efficacy

    Science.gov (United States)

    Potter, Christopher

    2016-01-01

    Waterways of the Sacramento San Joaquin Delta have recently become infested with invasive aquatic weeds such as floating water hyacinth (Eichhoria crassipes) and water primrose (Ludwigia peploides). These invasive plants cause many negative impacts, including, but not limited to: the blocking of waterways for commercial shipping and boating; clogging of irrigation screens, pumps and canals; and degradation of biological habitat through shading. Zhang et al. (1997, Ecological Applications, 7(3), 1039-1053) used NASA Landsat satellite imagery together with field calibration measurements to map physical and biological processes within marshlands of the San Francisco Bay. Live green biomass (LGB) and related variables were correlated with a simple vegetation index ratio of red and near infra-red bands from Landsat images. More recently, the percent (water area) cover of water hyacinth plotted against estimated LGB of emergent aquatic vegetation in the Delta from September 2014 Landsat imagery showed an 80 percent overall accuracy. For the past two years, we have partnered with the U. S. Department of Agriculture (USDA) and the Department of Plant Sciences, University of California at Davis to conduct new validation surveys of water hyacinth and water primrose coverage and LGB in Delta waterways. A plan is underway to transfer decision support tools developed at NASA's Ames Research Center based on Landsat satellite images to improve Delta-wide integrated management of floating aquatic weeds, while reducing chemical control costs. The main end-user for this application project will be the Division of Boating and Waterways (DBW) of the California Department of Parks and Recreation, who has the responsibility for chemical control of water hyacinth in the Delta.

  19. Effect of UV-C radiation and vapor released from a water hyacinth root absorbent containing bergamot oil to control mold on storage of brown rice.

    Science.gov (United States)

    Songsamoe, Sumethee; Matan, Narumol; Matan, Nirundorn

    2016-03-01

    The aims of this study were to develop absorbent material from a water hyacinth root containing bergamot oil and to improve its antifungal activity by using ultraviolet C (UV-C) against the growth of A. flavus on the brown rice. Process optimization was studied by the immersion of a water hyacinth root into a water and bergamot oil (300, 500 and 700 μl ml(-1)). The root (absorbent material) was dried at 50, 70, and 90 °C for 10 min. Then, ultraviolet C (UV-C) was used for enhancing the antifungal activity of bergamot oil for 10, 15, and 20 min. The shelf-life of the brown rice with the absorbent after incubation at 25 ° C with 100 % RH for 12 weeks was also investigated. A microscope and a Fourier transform infrared spectroscopy (FTIR) were used to find out possible mode of action. Results indicated that the absorbent material produced from the water hyacinth root containing bergamot oil at 500 μl ml(-1) in the water solution, dried at 70 ° C and UV for 15 min showed the highest antifungal activity in a vapor phase against A. flavus on the brown rice. A microscopy investigation confirmed that the water hyacinth root could absorb bergamot oil from an outside water solution into root cells. Limonene in vapor phase was shown to be a stronger inhibitor than essential oil after UV-C radiation and should be the key factor in boosting bergamot oil antifungal activity. A vapor phase of bergamot oil could be released and inhibit natural mold on the surface of the brown rice for up to 12 weeks; without the absorbent, mold covered the brown rice in only 4 weeks.

  20. Molecular identification of two strains of Cercospora rodmanii isolated from water hyacinth present in Yuriria lagoon, Guanajuato, Mexico and identification of new hosts for several other strains.

    Science.gov (United States)

    Montenegro-Calderón, José Guadalupe; Martínez-Álvarez, José Ascención; Vieyra-Hernández, Ma Teresa; Rangel-Macías, Luz Imelda; Razzo-Soria, Tannia; Chávez-Herrera, Roberto; Ponce-Noyola, Patricia; Leal-Morales, Carlos Alberto

    2011-11-01

    Water hyacinth is a beautiful monocotyledon plant that has been dispersed all over the world by humans. The plant has been present in Mexico since 1907, and many water bodies have become infested with it since then. In 2001, we initiated a survey in Yuriria lagoon in southern Guanajuato state to isolate fungi able to biocontrol the plant. We isolated 25 morphologically distinct fungal cultures, of which two were identified as members of the genus Cercospora. Cercospora species are among the most prevalent and destructive of plant pathogens and can be found on leaves, pedicels, stems, fruits, and bracts. Only two species of Cercospora, Cercospora piaropi, and Cercospora rodmanii, have been described on water hyacinth; however, the classification of these species has been controversial. Several molecular approaches have been used for Cercospora identification, and some candidate genes have been identified for use in Cercospora species determination. Although the nrRNA genes alone do not show sufficient resolution for species determination, histone H3, translation elongation factor1-α, β-tubulin, actin, and calmodulin have been shown in previous studies to have an adequate number of nucleotide changes to allow species identification. In the present study, we used partial sequences of the histone H3, actin, and calmodulin genes to identify our two isolates as C. rodmanii. Our two strains are not specific to water hyacinth, as they are also pathogenic to beet and sugar beet. Similar host ranges were found for C. rodmanii strains isolated from Tabasco in México, Zambia, and Brazil, however, the specificity for water hyacinth persists in Cercospora piaropi Tharp and C. rodmanii Conway, the latter being the most pathogenic.

  1. Large-scale utilization of water hyacinth for nutrient removal in Lake Dianchi in China: the effects on the water quality, macrozoobenthos and zooplankton.

    Science.gov (United States)

    Wang, Zhi; Zhang, Zhiyong; Zhang, Junqian; Zhang, Yingying; Liu, Haiqing; Yan, Shaohua

    2012-11-01

    An ecological engineering project using water hyacinth for nutrient removal was performed in Baishan Bay of a large shallow eutrophic lake, Lake Dianchi in China. In the present study, a systematic survey of water quality, macrozoobenthos and zooplankton inside (IWH), around (AWH) and far away (FWH) water hyacinth mats was conducted in Baishan Bay from August to October 2010. The results showed that the water quality significantly improved at AWH area. Concentrations of nitrogen and phosphorus were lower and transparency was higher at AWH area than those in IWH and FWH areas. Total densities, dominant species densities, and biodiversity indexes of macrozoobenthos and cladocerans as well as copepods did not differ (P>0.05) among each other in all three areas. It was significantly (P<0.05) different for those of rotifers at IWH area compared to those in AWH and FWH areas. The results might suggest a tremendous potential for the utilization of water hyacinth in the eutrophic lake like Lake Dianchi for nutrients removal.

  2. Application of hyperspectral techniques to multispectral data: spectral mixture analysis (SMA) in mapping of emergent macrophytes in a water-hyacinth-infested area

    Science.gov (United States)

    Idawo, Cuthbert; Jajah, Munzer; Laneve, Giovanni

    2004-02-01

    Water hyacinth (Eicchornia crassipes (Mart.) Solms) is an invasive aquatic macrophyte that has infested the lake Victoria, East Africa, since the late 1980s. It has been associated with major negative economic and ecological impact of this important water resource in East Africa. Remote sensing technology has significant potential in mapping this fast growing floating weed, in a mostly inaccessible area for field measurements. Our study site is the Winam Gulf, on the Kenyan part of the Lake, which has had the highest reported infestation in recent years. The paper describes a study to evaluate the ability of ETM+ multispectral imagery in mapping water hyacinth and associated macrophytes in the hyacinth infested Winam Gulf. By applying hyperspectral techniques on multispectral data, a spectral mixture analysis was undertaken using image-derived endmembers. The study was also an evaluation of an alternative way of acquiring emergent macrophytic endmembers in cases where limitations like lack of hyperspectral data, spectrometric measurements and spectral libraries exist. The results demonstrate that whereas it is possible to discriminate and map the different spectral constituents, a spectral library of the endmembers under investigation would be required for positive identification, especially for macrophytes that are closely related spectrally, fast growing, have varying concentrations (density) spatially, and are non-static in nature.

  3. Metal binding by humic acids isolated from water hyacinth plants (Eichhornia crassipes [Mart.] Solm-Laubach: Pontedericeae) in the Nile Delta, Egypt

    Energy Technology Data Exchange (ETDEWEB)

    Ghabbour, Elham A.; Davies, Geoffrey; Lam, Y.-Y.; Vozzella, Marcy E

    2004-10-01

    Humic acids (HAs) are animal and plant decay products that confer water retention, metal and organic solute binding functions and texture/workability in soils. HAs assist plant nutrition with minimal run-off pollution. Recent isolation of HAs from several live plants prompted us to investigate the HA content of the water hyacinth (Eichhornia crassipes [Mart.] Solm-Laubach: Pontedericeae), a delicately flowered plant from Amazonian South America that has invaded temperate lakes, rivers and waterways with devastating economic effects. Hyacinth thrives in nutrient-rich and polluted waters. It has a high affinity for metals and is used for phytoremediation. In this work, HAs isolated from the leaves, stems and roots of live water hyacinth plants from the Nile Delta, Egypt were identified by chemical and spectral analysis and by comparison with authentic soil and plant derived HAs. Similar carbohydrate and amino acid distributions and tight metal binding capacities of the HAs and their respective plant components suggest that the presence of HAs in plants is related to their metal binding properties.

  4. Extraction of volatile fatty acids (VFAs) from water hyacinth using inexpensive contraptions, and the use of the VFAs as feed supplements in conventional biogas digester

    Energy Technology Data Exchange (ETDEWEB)

    Sankar Ganesh, P.; Ramasamy, E.V.; Gajalakshmi, S.; Abbasi, S.A. [Pondicherry Univ., Pondicherry (India). Centre for Pollution Control and Energy Technology

    2004-07-01

    Water hyacinth is an aquatic weed and a readily available organic waste which can be fermented anaerobically. However, it cannot be fed to conventional biogas digesters because the phytomass is lighter than water and therefore floats on top of the digester contents and clogs the digester. This study used a simple and low-cost apparatus to extract volatile fatty acids (VFAs) from water hyacinth. The VFAs were then used as a supplement feed in cow dung-fed floating dome biogas digesters which are widely used in third World countries. The objective was to provide such digesters with feed derived from phytomass, particularly for times when animal dung is in short supply. The extraction of VFA occurs by aerobic degradation of water hyacinth. Methanogenesis takes place when the VFAs are fed into the biogas digesters, resulting in methane rich biogas. This newly developed VFA extraction method enables phytomass to be used as a feed supplement for biogas digesters without the adverse effects of solid accumulation, frothing or clogging that occurs with phytomass feed. 11 refs., 3 figs.

  5. Experiments on Herbivorous Fishes Inhibiting the Growth of Water Hyacinth (Eichharnia crassipes )%草食性鱼种抑制凤眼莲生长的试验

    Institute of Scientific and Technical Information of China (English)

    胡廷尖; 李训朗; 王雨辰; 黄社建; 胡旭昶; 刘士力; 李倩; 练青平

    2011-01-01

    Water hyacinth will cause diversity damage and ecological crisis once it is introduced into a new area because of its rapid and fast growth. In China and abroad, chemical technology and manual salvage and mechanical method or introduction into natural enemy of water hyacinth are used to remove or control water hyacinth. Although these methods offer certain effectiveness, it has some disadvantages of high cost, secondary pollution and lacks of not thorough enough. In this paper, we used rigorous design to study the inhibition effect of herbivorous fish such as grass carp, hybrid (F1 from Ctenopharyngodon idellus( ♂ ) and Squaliobarbus curriculus( ♀ ), Magalobrame tarminalis, Squaliobarbus curriculus, Allogyno genticcrucia and Erythroculter ilishaeformis on the removal effect of water hyacinth. All the juveniles were put in the same sixteen cages. The results showed different fingerlings with the same size (2.5-9 cm) had various capabilities to eat water hyacinth and arranged in following order: Ctenopharyngodon idellus 〉 hybrid 〉 Magalobrame tarminalis 〉 Squaliobarbus curriculus 〉 A llogyno genticcrucian 〉 Erythroculter ilishaeformis. The results indicated that herbivorous fish had different removal effects on water hyacinth. The present study innovatively used different kinds of fingerling to control water hyacinth, and provide a new approach to control ecological harmfulness caused by water hyacinth. The test shows that there is a bright application future to control water hyacinth with herbivorous fish.%通过严密的设计,在相同规格的16只网箱中,采用草鱼、杂交鱼[草鱼(6)和赤眼鳟(早)杂交繁育的F1]、三角鲂、赤眼鳟、异育银鲫和翘嘴红鲐等为试验对象,对凤眼莲生长的影响进行研究。结果表明:不同品种的鱼苗具有不同的控制凤眼莲的能力;在2.5~9.0cm范围内各鱼苗食用凤眼莲能力依次为:草鱼〉杂交鱼〉三角鲂〉赤

  6. 凤眼莲净化富营养化水体效果影响因素的综述%Water Hyacinth Eutrophic Water Purification Effect of Influential Factors Review

    Institute of Scientific and Technical Information of China (English)

    黄露露; 马晓建

    2015-01-01

    A comprehensive list of some of the factors that influence water hyacinth purify water eutrophication, and described the influence of water on the effect of these factors purify eutrophic water hyacinth, water hyacinth purification in order to promote the industrial application of eutrophic water bodies.%全面列举了一些影响凤眼莲净化富营养化水体的因素,并阐述了这些因素对凤眼莲净化富营养化水体效果的影响,以期推动凤眼莲净化富营养化水体的工业化应用。

  7. Research Review on Application of Microorganism in Resources Utilization of Water Hyacinth%微生物在水葫芦资源化利用中的应用研究综述

    Institute of Scientific and Technical Information of China (English)

    宁华; 涂卫国; 王琼瑶

    2016-01-01

    对水葫芦资源化利用中微生物的应用研究进行归纳和评述,并对如何进一步提高微生物作用效率进行探讨,以期为进一步开展水葫芦的资源化利用工作提供参考。%Studies on application of microorganism in resources utilization of water hyacinth were reviewed , the way to enhance the efficiency of microorganisms was discussed , so as to provide reference for resources utilization of water hyacinth .

  8. Optimization of bioethanol production using whole plant of Water Hyacinth as substrate in Simultaneous Saccharification and Fermentation process

    Directory of Open Access Journals (Sweden)

    Qiuzhuo eZhang

    2016-01-01

    Full Text Available The whole plant of Water Hyacinth that had potential to remove heavy metals from wastewater was used as substrate for bioethanol production in the current study. It was found that acid pretreatment exhibited the most effective for reducing sugars production. An amount of 402.93 mg reducing sugars was achieved at optimal condition after pretreatment and enzymatic hydrolysis. A regression model was built to optimize the fermentation factors according to Response Surface Method (RSM in Saccharification and Fermentation (SSF process. The optimized condition for ethanol production by SSF process was fermented at 38.87℃ for 81.87 h when inoculated with 6.11 ml yeast. 1.291 g/L bioethanol could be achieved by our predicted model in optimal condition. Meanwhile, 1.289 g/L ethanol was produced, which showed reliability of presented regression model in this study. The optimization method discussed in the present study leading to relatively high bioethanol production could provide a promising way for Alien Invasive Species with high cellulose content.

  9. Co-fermentation of water hyacinth and beverage wastewater in powder and pellet form for hydrogen production.

    Science.gov (United States)

    Lay, Chyi-How; Sen, Biswarup; Chen, Chin-Chao; Wu, Jou-Hsien; Lee, Shih-Chi; Lin, Chiu-Yue

    2013-05-01

    Hydrogen (H2) production potential of water hyacinth (WH) and beverage wastewater (BW) mixture in powder and pellet form at various combination ratios were evaluated. Batch co-fermentation results showed peak biogas production of 105.5 mL and H2 production of 55.6 mL at the combination ratio of 1.6 g WH and 2.4 g BW in pellet form. With the same ratio in pellet form, the maximum H2 production rate 542 mL H2/L-d, maximum specific H2 production rate 869 mL H2/g VSS-d and H2 yield 13.65 mL/g feedstock were obtained, and were 88, 88 and 34% higher than its powder form. The predominant soluble metabolite was acetate in the concentration of 1059-2639 mg COD/L (40-79% of total metabolites) in most runs during co-fermentation of mixed feedstock. Carbon-to-nitrogen ratio and the physical form of the combined feedstock are essential criteria for optimum H2 production. Co-fermentation also alleviates the waste disposal problem of the industries.

  10. Reducing the bioavailability and leaching potential of lead in contaminated water hyacinth biomass by phosphate-assisted pyrolysis.

    Science.gov (United States)

    Shi, Lingna; Wang, Lijun; Zhang, Tao; Li, Jianfa; Huang, Xiaoyi; Cai, Jing; Lü, Jinhong; Wang, Yue

    2017-10-01

    For the purpose of safe disposal of biomass contaminated by biosorption of heavy metals, phosphate-assisted pyrolysis of water hyacinth biomass contaminated by lead (Pb) was tried to reduce the bioavailability and leaching potential of Pb, using direct pyrolysis without additive as a control method. Direct pyrolysis of the contaminated biomass at low temperatures (300 and 400°C) could reduce the bioavailability of Pb, but the leaching potential of Pb was increased with the rising pyrolysis temperature. While phosphate-assisted pyrolysis significantly enhanced the recovery and stability of Pb in the char. Specifically, the percentages of bioavailable Pb and leachable Pb in the chars obtained by phosphate-assisted pyrolysis at low temperatures were reduced to less than 5% and 7%, respectively. The sequential extraction test indicated the transformation of Pb into more stable fractions after phosphate-assisted pyrolysis, which was related to the formation of Pb phosphate minerals including pyromorphite and lead-substituted hydroxyapatite. Copyright © 2017 Elsevier Ltd. All rights reserved.

  11. Extraction and antioxidant activities assay of polysaccharides from white Hyacinth bean and promoting-growth to probiotics

    Directory of Open Access Journals (Sweden)

    Ni LEI

    2016-12-01

    Full Text Available The extraction parameters of water-soluble polysaccharides (WPs from white hyacinth bean were optimized using single-factor and orthogonal experiment. The antioxidant activities of WPs were presented by assaying three different radicals, 2,2-diphenyl-1-picrylhydrazy radical (DPPH radical, hydroxyl radical and superoxide radical scavenging ability. In addition, the effects of WPs obtained on the growth of three probiotic strains (Lactobacillus acidophilus LA5, Bifidobacterium bifidum BB01 and Lactobacillus bulgaricus LB6 were also determined by measuring the OD and pH value of culture medium. According to the results, the optimum extraction parameters were as follows: the ratio of water to material was 50, extraction time was 2h and the extraction temperature was 95°C. The yield of WPs reached 1.15±0.07% under this condition. In addition, the WPs had different scavenging ability on three radicals (hydroxyl > DPPH > superoxide. And the WPs could promote the growth of LA5, BB01 and LB6.

  12. Enhanced adsorption of methylene blue by citric acid modification of biochar derived from water hyacinth (Eichornia crassipes).

    Science.gov (United States)

    Xu, Yan; Liu, Yunguo; Liu, Shaobo; Tan, Xiaofei; Zeng, Guangming; Zeng, Wei; Ding, Yang; Cao, Weicheng; Zheng, Bohong

    2016-12-01

    In this work, a novel potential adsorbent, citric acid (CA)-modified biochar, named as CAWB, was obtained from water hyacinth biomass by slow pyrolysis in a N2 environment at 300 °C. The CA modification focused on enhancing the contaminants adsorption capacity of biochar pyrolyzed at relatively low temperature. Over 90 % of the total methylene blue (MB) could be removed at the first 60 min by CAWB, and the maximum MB adsorption capacity could reach to 395 mg g(-1). The physicochemical properties of CAWB was examined by FTIR, XPS, SEM, and BET analysis. The results indicated that the additional carboxyl groups were introduced to the surface of CAWB via the esterification reaction with CA, which played a significant role in the adsorption of MB. Batch adsorption studies showed that the initial MB concentration, solution pH, background ionic strength, and temperature could affect the removal efficiency obviously. The adsorption process could be well described by the pseudo-second-order kinetic model and Langmuir isotherm. Thermodynamic analysis revealed that the MB adsorption onto CAWB was an endothermic and spontaneous process. The regeneration study revealed that CAWB still exhibited an excellent regeneration and adsorption performance after multiple cycle adsorptions. The adsorption experiments of actual dye wastewater by CAWB suggested that it had a great potential in environmental application.

  13. Difficulties encountered at the beginning of professional life: results of a 2003 pilot survey among undergraduate students in Paris Rene Descartes University (France).

    Science.gov (United States)

    Benbelaïd, R; Dot, D; Levy, G; Eid, N

    2006-11-01

    In addition to dental hospital clinical activity, dental students at Paris Rene Descartes University have the opportunity in their final year of study to practise clinically in a dental office, as associates. This paper outlines a pilot, experimental study designed to assess student reaction to this Vocational Clinical Activity (VCA) in order to identify relevant weaknesses of the undergraduate programme. Using questionnaires, data were collected for each of the following clinical or management skills: clinical difficulty, therapeutic decision-making, patient/practitioner relationship, time management, administrative matters and technical problems. Students were asked to rank each item in order of difficulty (1, high level to 6, low level). A high response rate was observed (90%) among the 50 undergraduate VCA students. The results pointed out three main difficulties encountered by undergraduate students during the VCA: time management (90% of the students), administrative matters (85% of the students) and clinical decision-making (80% of the students). These preliminary results need further investigation. However, they give us the incentive to carry on with this type of assessment and to extend it to young, qualified colleagues' perceptions and to other French Universities.

  14. Water hyacinths (Eichhornia crassipes) as indicators of heavy metal impact of a large landfill on the Almendares River near Havana, Cuba.

    Science.gov (United States)

    Olivares-Rieumont, S; Lima, L; De la Rosa, D; Graham, D W; Columbie, I; Santana, J L; Sánchez, M J

    2007-12-01

    The Almendares River is central to recreational and other activities in Havana, Cuba. However, monitoring indicated significant heavy metal contamination in river sediments, especially below Calle 100, the largest landfill in Havana. This work extended previous sediment studies by determining complementary Cu, Pb, Ni, Cr, Cd, and Zn levels in indigenous water hyacinths (Eichhornia crassipes; EC) above and below the landfill. Pb, Cu, and Zn were significantly elevated in EC roots below the landfill and also correlated with sediment data (p < 0.05), implying elevated levels likely result from landfill activity and might be useful biomonitors as river remediation proceeds.

  15. 不同水培条件对风信子生长的影响%Influence of different hydroponic conditions on the hyacinth's growth

    Institute of Scientific and Technical Information of China (English)

    赵娇娇; 王波; 纪羚; 刘颖; 王晶; 马慧; 董必慧

    2012-01-01

      以含有不同KH2PO4浓度控制不同的风信子水培条件,选择卡耐基品系大小均一的风信子鳞茎设置对照组进行试验,观察并记录不同水培条件下风信子叶芽、根系、花的生长等情况.初步总结不同水培条件对风信子生长的影响,结果表明:卡耐基品系的风信子在水培时,其根系在浓度为0.05 mmol/L KH2PO4水培条件下的长度与其他KH2PO4浓度水培条件下的风信子根系长度有显著差异.而在不同的KH2PO4浓度水培条件下,风信子的花期时长、花茎高度和叶片长度并没有显著差异.此外,试验还讨论证实适当的钾和磷可以提前风信子的花期、提高花的品质和观赏价值.%  Taking homogeneous hyacinth bulbs of Carnegie strains as materials, the effect of different KH2PO4 hydroponic concentra-tion on the growth of leaf, root, flower etc. were observed and recorded. The results show the root length of the hyacinth of Carnegie strains in 0.05 m mol/L KH2PO4 hydroponic concentration has significant deference with the other hydroponic treatments. As to the duration of flowering, stem height and length of leaf, there is no significant deference between the different KH2PO4 hydroponic con-centration treatments. In addition, the paper also proved that the appropriate potassium and phosphorus can advance the flowing time of hyacinth and improve the quality and ornamental value of hyacinth flower.

  16. Ultrafast spectroscopy studies on the mechanism of electron transfer and energy conversion in the isolated pseudo ginseng, water hyacinth and spinach chloroplasts

    Institute of Scientific and Technical Information of China (English)

    2001-01-01

    The spectroscopy characteristics and the fluorescence lifetime for the chloroplasts isolated from the pseudo ginseng, water hyacinth and spinach plant leaves have been studied by absorption spectra, low temperature steady-state fluorescence spectroscopy and single photon counting measurement under the same conditions and by the same methods. The similarity of the absorption spectra for the chloroplasts at room temperature suggests that different plants can efficiently absorb light of the same wavelength. The fluorescence decays in PS II measured at the natural QA state for the chloroplasts have been fitted by a three-exponential kinetic model. The three fluorescence lifetimes are 30, 274 and 805 ps for the pseudo ginseng chloroplast; 138, 521 and 1494 ps for the water hyacinth chloroplast; 197, 465 and 1459 ps for the spinach chloroplast, respectively. The slow lifetime fluorescence component is assigned to a collection of associated light harvesting Chl a/b proteins, the fast lifetime component to the reaction center of PS II and the middle lifetime component to the delay fluorescence of recombination of and Pheo-. The excitation energy conversion efficiency (η) in PS II RC is defined and calculated on the basis of the 20 ps electron transfer time constant model, 60%, 87% and 91% for the pseudo ginseng, water hyacinth and spinach chloroplasts, respectively. This interesting result is in unconformity with what is assumed to be 100% efficiency in PS II RC. Our result in this work stands in line with the 20 ps electron transfer time constant in PS II rather sound and the water hyacinth plant grows slower than the spinach plant does as envisaged on the efficiency. But, our results predict that those plants can perform highly efficient transfer of photo-excitation energy from the light-harvesting pigment system to the reaction center (closely to 100%). The conclusion contained in this paper reveals the plant growth characteristics expressed in the primary processes of

  17. Solar dehydration of the water hyacinth and his characterization as fuel; Desidratacao solar do jacinto d'agua e sua caracterizacao como combustivel

    Energy Technology Data Exchange (ETDEWEB)

    Oliveira, Marcio Amaral de [Universidade Salgado de Oliveira, Niteroi, RJ (Brazil). Dept. de Ciencias Exatas e Tecnologicas; Pinto, Carmen Lucia R. [Instituto Nacional de Tecnologia (INT), Rio de Janeiro, RJ (Brazil). Div. de Meio Ambiente; Pereira, Roberto Guimaraes [Universidade Federal Fluminense, Niteroi, RJ (Brazil). Dept. de Engenharia Mecanica

    1998-07-01

    Because of a new technology for waste water treatment utilizing water treatment utilizing water hyacinth as an instrument for water pollution control, studies were developed to profit the resultant biomass from this process proposing its utilization like an energy source after its dehydration. A direct exposition solar dryer with double glazing was utilized in the process. During the process were evaluated the following parameters: time of drying: physicochemistry characteristics of the plant; and inlet air, outlet air and inside air temperatures during the whole process of drying. (author)

  18. Integrated biological control of water hyacinths, Eichhornia crassipes by a novel combination of grass carp, Ctenopharyngodon idella (Valenciennes, 1844), and the weevil, Neochetina spp.

    Institute of Scientific and Technical Information of China (English)

    GOPALAKRISHNAN Ayyaru; RAJKUMAR Mayalagu; SUN Jun; PARIDA Ajay; VENMATHI MARAN Balu Alagar

    2011-01-01

    The efficacy of grass carp Ctenopharyngodon idella (Cyprinidae) and weevils Neochetina spp. (Curculionidae) to control the aquatic weed, water hyacinth, is investigated in a square net cage (happas) setting at a farm in Cuddalore District, South India. This novel combination of insects and fish is found to be superior to individual treatments for controlling the weed growth within 110 d. The biomass of the weed, number of plants, percentage of flowered plants and chlorophyll contents were studied. The weed biomass is reduced from 5 kg (dayto 0.33 kg (day 110) when exposed to grass carp and weevils. The number of plants is reduced to 0.75 in grass carp and weevil exposed happas, while it is 741.5 in the control. The mean number of leaves per plant is also reduced. In addition, the chlorophyll a and b are significantly reduced in happas exposed to the combination of fish and insects when compared to the other treatments. Based on the results of this study, we consider the combined use of grass carp and weevils to be more efficient and sustainable for managing water hyacinths than the use of these organisms individually.

  19. Removal of nickel ion from electroplating wastewater using double chamber electrodeposition cell (DCEC) reactor partitioned with water hyacinth (Eichhornia crassipes) leaves

    Science.gov (United States)

    Djaenudin; Widyarani; Hariyadi, H. R.; Wulan, D. R.; Cahyaningsih, S.

    2017-03-01

    Nickel is a heavy metal present in many types of industrial wastewater, and its contamination to the water bodies should be prevented. The objective of this research was to study the performance of Double Chamber Electrodeposition Cell (DCEC) for nickel ion removal. Water hyacinth (Eichhornia crassipes) leaves were used to separate the two chambers. The experiment was performed with synthetic electroplating wastewater in a batch system for 72 h. Changes of pH, electric current, and nickel ion concentration in the catholyte were monitored. An experiment with Single Chamber Electrodeposition Cell (SCEC) was also performed as comparison. After 72 h operation of DCEC, nickel ion concentration in the catholyte decreased from 2200 g.m-3 to 0.4 g.m-3, equivalent to 99.98% removal. DCEC reactor performed better than the SCEC reactor that only achieved 59% removal. The results show that an almost-complete removal of nickel ion can be achieved with DCEC. Water hyacinth leaves can be used as low-cost alternatives for industrial membranes.

  20. Novel rhythms of N1-acetyl-N2-formyl-5-methoxykynuramine and its precursor melatonin in water hyacinth: importance for phytoremediation.

    Science.gov (United States)

    Tan, Dun-Xian; Manchester, Lucien C; Di Mascio, Paolo; Martinez, Glaucia R; Prado, Fernanda M; Reiter, Russel J

    2007-06-01

    N1-acetyl-N2-formyl-5-methoxykynuramine (AMFK) is a major metabolite of melatonin in mammals. To investigate whether AFMK exists in plants, an aquatic plant, water hyacinth, was used. To achieve this, LC/MS/MS with a deuterated standard was employed. AFMK was identified in any plant for the first time. Both it and its precursor, melatonin, were rhythmic with peaks during the late light phase. These novel rhythms indicate that these molecules do not serve as the chemical signal of darkness as in animals but may relate to processes of photosynthesis or photoprotection. These possibilities are supported by higher production of melatonin and AFMK in plants grown in sunlight (10,000-15,000 microW/cm2) compared to those grown under artificial light (400-450 microW/cm2). Melatonin and AFMK, as potent free radical scavengers, may assist plants in coping with harsh environmental insults, including soil and water pollutants. High levels of melatonin and AFMK in water hyacinth may explain why this plant more easily tolerates environmental pollutants, including toxic chemicals and heavy metals and is successfully used in phytoremediation. These novel findings could lead to improvements in the phytoremediative capacity of plants by either stimulating endogenous melatonin synthesis or by adding melatonin to water/soil in which they are grown.

  1. Pb(II) Adsorption from Aqueous Solution by Water Hyacinth%水葫芦对水中Pb(Ⅱ)的吸附性能研究

    Institute of Scientific and Technical Information of China (English)

    閤明勇; 杨光

    2012-01-01

    通过静态吸附实验,研究了干体水葫芦对水中的重金属离子Pb(II)的吸附性能,考察了吸附剂投加量、重金属溶液起始浓度、溶液起始pH值及吸附时间对Pb(II)去除效果的影响。研究结果表明,水葫芦对Pb(II)吸附效果明显优于桔子皮、木屑和玉米芯屑,具有吸附时间短、投加量少、适应pH值范围广的特点。%Pb (II) adsorption effects of adsorbent dosage, initial results showed that water hyacinth sawdust and corn cob with respect from aqueous solution by dried water hyacinth was studied asing batch technique. The concentration, initial pH and contact time on Pb (II) adsorption were investigated. The was much more effective in Pb (II) removal from aqueous solution than orange peel, to shorter equilibrium time, less adsorption dosage and broader pH range.

  2. Effects of Additives on Quality of Water Hyacinth and Corn Straw Mixed Silages%添加剂对水葫芦玉米秸秆混合青贮品质的影响

    Institute of Scientific and Technical Information of China (English)

    庄益芬; 陈鑫珠; 廖惠珍; 林志城; 祁瑞雪; 张文昌

    2011-01-01

    For the purpose of producing high quality silage, water hyacinth silage and water hyacinth & corn straw mixed silage were studied. Water hyacinth & corn straw were mixed into 5 silages with their weight ratio of 80:20, 70:30, 60:40, 50:50 and 40:60, besides water hyacinth silage. Water hyacinth silage and mixed silage with CON, corn straw fermented green juice (FGJC), water hyacinth fermented green juice (FGJW), and formic acid (FA), foraform (FOR) was ensiled to study the effect of the additives. Each treatment was 2 repeats. Silages were fermented for 60 days under normal temperature. Then the pH value, dry matter rate (DMR), gas loss rate (GLR), ammonia nitrogen (NH3-N), and other items were measured. The result showed that 4 additives significantly affected the fermentation quality of silages. The effect of FGJC and FGJW to the mixed silages with 80:20 mixed ratio was the best. The fermentation quality of mixed silages with additives was better than water hyacinth silages. Preparing of water hyacinth & corn straw mixed silages is a good way to utilize water hyacinth.%为开发利用水葫芦生产优质青贮,研究制作了水葫芦单贮和5种水葫芦玉米秸秆混合青贮(混贮),5种混贮的水葫芦:玉米秸秆(质量比)分别为80∶20、70∶30、60∶40、50∶50和40∶60(简称为80∶20混贮等),并在单贮和各种混贮中设对照(CON)组、添加玉米秸秆绿汁发酵液(FGJC)组、添加水葫芦绿汁发酵液(FGJW)组、添加蚁酸(FA)组和添加四蚁酸铵(FOR)组.每个处理作2次重复,常温下贮存60天,开封后测定青贮的pH、干物质回收率(DMR)、气体损失率(GLR)、氨态氮(NH3-N)等指标.结果表明,4种添加剂在所有青贮中都有一定的添加效果,其中,FGJC组和FGJW组在80:20混贮中的添加效果最佳;混贮的品质均优于单贮.调制水葫芦玉米秸秆混贮是开发利用水葫芦的一条极佳途径.

  3. Effect of Water Hyacinth (Eichhornia Crassipes) Silage on Intake and Nutrient Digestibility in Cattle Fed Rice Straw and Cottonseed Cake

    Science.gov (United States)

    Tham, Ho Thanh; Udén, Peter

    2013-01-01

    Four crossbred Sindhi heifers with an average body weight (BW) of 135 kg and a mean age of 17 months were used to investigate the effect of feeding different combinations of rice straw and ensiled water hyacinth (EWH) supplemented with a source of protein in the form of cottonseed cake (CSC) on intake and digestibility. Four treatments consisting of graded levels of EWH were arranged in a 4×4 Latin square. The levels of EWH were set at: 0 (EWH0), 15 (EWH15), 30 (EWH30), and 45% (EWH45) of an expected total dietary dry matter (DM) intake of 30 g total DM per kg BW per day. Rice straw was offered ad libitum, while CSC was given at a fixed level of 5 g DM/kg body weight (BW). Voluntary intake and digestibility were measured consecutively in the 4 experimental periods which each lasted 28 days. The crude protein (CP) content of EWH, rice straw and CSC were 174, 53 and 370 g/kg DM, respectively. Rice straw had the highest neutral detergent fibre (NDFom) content (666 g/kg DM), followed by EWH (503 g/kg DM) and the lowest content was 418 g/kg DM in the CSC. The actual EWH contents in the consumed diets were 0, 17, 32 and 52% for EWH0, EWH15, EWH30 and EWH45, respectively. Rice straw intake decreased with level of EWH offered from 3049 for EWH0 to 1014 g/day for EWH45. Crude protein intake was 16, 25 and 33% higher (p<0.001) in EWH15, EWH30 and EWH45 treatments, respectively, as compared to EWH0. Digestibility of organic matter (OM), CP, NDFom and acid detergent fibre (ADFom) increased with increasing level of EWH offered. The highest OM digestibility (72.2%) was found for treatment EWH45 and the lowest (47.4%) for treatment EWH0. In spite of similar dietary CP contents, CP digestibility increased by 21 (EWH15), 31 (EWH30) and 40% (EWH45) with increasing level of EWH in comparison with treatment EWH0. It is concluded that increasing level of EWH in cattle diets considerably improved CP intake and digestibility of nutrients. PMID:25049834

  4. Rene hænder?

    DEFF Research Database (Denmark)

    Jørgensen, Thomas Ekman

    2007-01-01

    Kommentar til den diplomatiske krise mellem Italien og Kroatien i februar 2007 omkring erindringen af henholdsvis italienske og kroatiske krigsforbrydelser under anden verdenskrig. Krisen bruges som et eksempel på, at gamle medlemslande i EU stiller større krav om til erindringskulturen i ansøger...

  5. PENGEMBANGAN TEPUNG KAYA PROTEIN (TKP dari KORO KOMAK (Lablab purpureus (L Sweet DAN KORO KRATOK (Phaseolus lunatus [Development of Protein Rich Flour (PRF from Hyacinth Bean (Lablab purpureus (L Sweet and Lima bean (Phaseolus lunatus

    Directory of Open Access Journals (Sweden)

    Ahmad Nafi1

    2006-12-01

    Full Text Available With respect to high content of carbohydrate and protein, Protein Rich Flour (PRF were developed from non-oilseed legumes i.e. hyacinth bean (Lablab purpureus (L Sweet and lima bean (Phaseolus lunatus PRF. PRFs were prepared using water and NaOH solution (0.01N as extraction solvent. After precipitation in isoelectric point (pHs the PRFs produced were characterized to determine the potential applications. The results showed that PRF from hyacinth bean which extracted by water was the best product with yield of 31.19%, protein content 58.41±4.45%, solubility 82-100% and oil holding capacity 93.92±9.19. Moreover pepsin-digestibility of the hyacinth bean PRF was higher (8.29±0.34% than soybean protein isolate (7.10±0.37% or casein (7.04±0.14%. Based on their characteristics, PRFs regarded as potential to be developed as novel food ingredient.

  6. A Statistical Approach for Optimization of Simultaneous Production of β-Glucosidase and Endoglucanase by Rhizopus oryzae from Solid-State Fermentation of Water Hyacinth Using Central Composite Design

    Directory of Open Access Journals (Sweden)

    Moumita Karmakar

    2011-01-01

    Full Text Available The production cost of β-glucosidase and endoglucanase could be reduced by using water hyacinth, an aquatic weed, as the sole carbon source and using cost-efficient fermentation strategies like solid-state fermentation (SSF. In the present study, the effect of different production conditions on the yield of β-glucosidase and endoglucanase by Rhizopus oryzae MTCC 9642 from water hyacinth was investigated systematically using response surface methodology. A Central composite experimental design was applied to optimize the impact of three variables, namely, substrate concentration, pH, and temperature, on enzyme production. The optimal level of each parameter for maximum enzyme production by the fungus was determined. Highest activity of endoglucanase of 495 U/mL was achieved at a substrate concentration of 1.23%, pH 7.29, and temperature 29.93°C whereas maximum β-glucosidase activity of 137.32 U/ml was achieved at a substrate concentration of 1.25%, pH 6.66, and temperature 32.09°C. There was a direct correlation between the levels of enzymatic activities and the substrate concentration of water hyacinth as carbon source.

  7. Residue Determination of Glyphosate in Water Hyacinth and Aquaculture Water by Ion Chromatography%离子色谱法测试草甘膦在水葫芦及其养殖水中的残留

    Institute of Scientific and Technical Information of China (English)

    林岸清

    2012-01-01

      Glyphosate, which named N-(Phosphonomethyl)glycine, is a non-selective chronic organophosphorus systemic insecticides. It shows good controlling effect on water hyacinth. In this paper, the qualitative and quantitative analysis of glyphosate in hyacinth leaves and aquaculture water after different spray time were processed by ion chromatography, and the residue and degradation of ghyphosate in water hyacinth and the aquaculture water were investigated.%  草甘膦(glyphosate)学名N-(邻酰基甲基)甘氨酸,是一种灭生性慢性内吸有机磷除草剂,对水葫芦具有较好的防治效果。本文中用离子色谱法对喷药后不同时间水葫芦茎叶中和养殖水中的草甘膦进行定性定量分析,研究喷药后草甘膦在水葫芦中及其养殖水中的残留和降解情况。

  8. Intra and interobserver variability of renal allograft ultrasound volume and resistive index measurements; Variabilita' intra- ed interoperatore delle misure ecografiche del volume e dell'indice di resistenza del rene trapiantato

    Energy Technology Data Exchange (ETDEWEB)

    Mancini, Marcello; Liuzzi, Raffaele [CNR, Napoli (Italy). Istituto di biostrutture e bioimmagini; Daniele, Stefania; Raffio, Teresa; Salvatore, Marco [Napoli Univ., Napoli (Italy). Dipartimento di diagnostica per immagini; Sabbatini, Massimo; Cianciaruso, Bruno [Napoli Univ., Napoli (Italy). Istituto di nefrologia medica; Ferrara, Liberato Aldo [Napoli Univ., Napoli (Italy). Dipartimento di medicina clinica e sperimentale

    2005-04-01

    Purpose: Aim of the presents study was to evaluate the repeatability and reproducibility of the Doppler Resistive Index (R.I.) and the Ultrasound renal volume measurement in renal transplants. Materials and methods: Twenty -six consecutive patients (18 men, 8 women) mean age of 42,8{+-}12,4 years (M{+-}SD)(range 22-65 years) were studied twice by each of two trained sonographers using a color Doppler ultrasound scanner. Twelve of them had a normal allograft function (defined as stable serum creatinine levels {<=}123,76 {mu}mol/L), whilst the remaining 14 had decreased allograft function (serum creatinine 132.6-265.2 {mu}mol/L). Results were given as mean of 6 measurements performed at upper, middle and lower pole of the kidney. Intra- and interobserver variability was assessed by the repeatability coefficient and coefficient of variation (CV). Results: Regarding Resistive Index measurement, repeatability coefficient was between 0.04 and 0.06 and the coefficient of variation was <5%. The analysis of the Student's test did not show any significant difference between the measurements (t=0.15; p=0.87 n.s.). A good reproducibility was also detected in US measurements of renal length and volume. Conclusions: These results suggest that Color Doppler Resistive Index measurements of renal allograft and Ultrasound renal volume measurements are repeatable and reproducible. [Italian] Scopo: Valutare la ripetibilit� e la riproducibilit� delle misurazioni ecografiche dell'Indice di Resistenza (I.R.) e del volume del rene trapiantato. Materiale e metodi: Ventisei pazienti (18 uomini, 8 donne) con et� media di 42,8{+-}12,4 anni (M{+-}SD)(range 22-65 anni) sono stati studiati consecutivamente due volte con eco-color-Doppler da due ecografisti esperti. Dodici pazienti avevano funzione renale normale (livello serico di creatina stabilmente {<=}123,76 {mu}mol/L, i rimanenti 14 avevano una lieve e stabile disfunzione del rene trapiantato (creatina serica 132.6-265.2 {mu

  9. Analysis of the type IV fimbrial-subunit gene fimA of Xanthomonas hyacinthi: application in PCR-mediated detection of yellow disease in Hyacinths.

    Science.gov (United States)

    van Doorn, J; Hollinger, T C; Oudega, B

    2001-02-01

    A sensitive and specific detection method was developed for Xanthomonas hyacinthi; this method was based on amplification of a subsequence of the type IV fimbrial-subunit gene fimA from strain S148. The fimA gene was amplified by PCR with degenerate DNA primers designed by using the N-terminal and C-terminal amino acid sequences of trypsin fragments of FimA. The nucleotide sequence of fimA was determined and compared with the nucleotide sequences coding for the fimbrial subunits in other type IV fimbria-producing bacteria, such as Xanthomonas campestris pv. vesicatoria, Neisseria gonorrhoeae, and Moraxella bovis. In a PCR internal primers JAAN and JARA, designed by using the nucleotide sequences of the variable central and C-terminal region of fimA, amplified a 226-bp DNA fragment in all X. hyacinthi isolates. This PCR was shown to be pathovar specific, as assessed by testing 71 Xanthomonas pathovars and bacterial isolates belonging to other genera, such as Erwinia and Pseudomonas. Southern hybridization experiments performed with the labelled 226-bp DNA amplicon as a probe suggested that there is only one structural type IV fimbrial-gene cluster in X. hyacinthi. Only two Xanthomonas translucens pathovars cross-reacted weakly in PCR. Primers amplifying a subsequence of the fimA gene of X. campestris pv. vesicatoria (T. Ojanen-Reuhs, N. Kalkkinen, B. Westerlund-Wikström, J. van Doorn, K. Haahtela, E.-L. Nurmiaho-Lassila, K. Wengelink, U. Bonas, and T. K. Korhonen, J. Bacteriol. 179: 1280-1290, 1997) were shown to be pathovar specific, indicating that the fimbrial-subunit sequences are more generally applicable in xanthomonads for detection purposes. Under laboratory conditions, approximately 1,000 CFU of X. hyacinthi per ml could be detected. In inoculated leaves of hyacinths the threshold was 5,000 CFU/ml. The results indicated that infected hyacinths with early symptoms could be successfully screened for X. hyacinthi with PCR.

  10. Experimental study on the survival of the water hyacinth (Eichhornia crassipes (Mart.) Solms--Pontederiaceae) under different oil doses and times of exposure.

    Science.gov (United States)

    Lopes, Aline; Piedade, Maria Teresa Fernandez

    2014-12-01

    In the last decades, petroleum activities have increased in the Brazilian Amazon where there is oil exploration on the Urucu River, a tributary of the Amazon River, about 600 km from the city of Manaus. Particularly, transportation via the Amazon River to reach the oil refinery in Manaus may compromise the integrity of the large floodplains that flank hundreds of kilometers of this major river. In the Amazon floodplains, plant growth and nutrient cycling are related to the flood pulse. When oil spills occur, floating oil on the water surface is dispersed through wind and wave action in the littoral region, thus affecting the vegetation of terrestrial and aquatic environments. If pollutants enter the system, they are absorbed by plants and distributed in the food chain via plant consumption, mortality, and decomposition. The effect of oil on the growth and survival of vegetation in these environments is virtually unknown. The water hyacinth [Eichhornia crassipes (Mart.) Solms] has a pantropical distribution but is native to the Amazon, often growing in high-density populations in the floodplains where it plays an important role as shelter and food source for aquatic and terrestrial biota. The species is well known for its high capacity to absorb and tolerate high levels of heavy metal ions. To study the survival and response of water hyacinth under six different oil doses, ranging from 0 to 150 ml l(-1), and five exposure times (1, 5, 10, 15, and 20 days), young individuals distributed in a completely randomized design experiment composed of vessels with a single individual each were followed over a 50-day period (30-day acclimatization, 20 days under oil treatments). Growth parameters, biomass, visual changes in the plants, and pH were recorded at 1, 5, 10, 15, and 20 days. Increasing the time of oil exposure caused a decrease in biomass, ratio of live/dead biomass and length of leaves, and an increase in the number of dead leaves. Dose of oil and time of exposure

  11. Comparison of Genomic DNA Extraction Methods From Hyacinth%风信子DNA不同提取方法的效果比较

    Institute of Scientific and Technical Information of China (English)

    胡凤荣; 任翠; 鲍仁蕾; 罗凤霞

    2011-01-01

    采用简易CTAB法、改良CTAB法、SDS-CTAB法、高盐法和CTAB-硅珠法等5种方法对风信子花蕾、叶片和鳞片基因组DNA进行提取.比较DNA纯度、电泳、得率等指标,结果表明:CTAB-硅珠法没有获得DNA,其他方法均可提出DNA;在纯度方面,简易CTAB法>SDS-CTAB法>改良CTAB法>高盐法;在得率方面,简易CTAB法>改良CTAB法>高盐法>SDS-CTAB法.简易CTAB法提取的DNA纯度较高,OD260/OD280为2.01,OD260/OD230为2.33,浓度为406.8ng·μL-1,得率为175.95ng· μL-1.花蕾、叶片适合风信子基因组DNA的提取.%Five methods including simple CTAB, CTAB improved method, SDS-CTAB method, high salt precipitation method and silica-purification method were used to extract genomic DNA from different parts of Hyacinth such as bud, leaves, scale. The results were compared by three parts, purity, the electrophoreses results and yield of the extracted DNA. The results showed that all of these DNA extraction methods except for CTAB-silica-purification method could obtain DNA. The purity of extracted DNA was as following : simple CTAB method >SDS-CTAB method >CTAB improved method>high salt precipitation method, and yield as following : simple CTAB method >CTAB improved method >high salt precipitation method >SDS-CTAB method. Simple CTAB method could obtain more purity DNA than the other methods and OD260/OD280 was 2.01,OD260/OD230 was 2.33. The concentration was 406.8ng-L~1 and the yield was 175.95ng·g-1.The extraction results from different parts showed that flower buds and leaves were both suit for Hyacinth obtain DNA.

  12. ”Fra passivitet til aktivitet” – En oversikt over utvikling og endringer på folketrygdens områder de senere årene

    Directory of Open Access Journals (Sweden)

    Grete Damberg

    2010-01-01

    Full Text Available Det har i de senere år skjedd store forandringer på folketrygdens område. Det har blitt lagt mer og mer vekt på viktigheten av å kunne være i aktivitet hvis det ikke er medisinske hindringer for dette. I endringene som er foretatt, er det fokus på den enkeltes muligheter til å være i arbeid mer enn på eventuelle begrensninger. Dette kommer fram gjennom endringer på sykefraværsområdet med innføring av aktivitetsplikt for den sykmeldte og gjennom ny sykefraværsmodell med fokus på oppfølging, involvering av arbeidsgiver, behandler og NAV. Arbeidsplassen er hovedarena for sykefraværsoppfølging, og arbeidsgiver og arbeidstaker er hovedaktører. Dette er en videreføring av føringene i Intensjonsavtalen om et inkluderende arbeidsliv. Også på området for rehabiliteringspenger, yrkesrettet attføring og uføreytelser legges det vekt på at den enkelte skal forsøke seg i arbeid hvis det medisinsk sett er mulig. I 2010 skjer det en større endring ved at rehabiliteringspenger, yrkesrettet attføring og tidsbegrenset uførestønad fjernes og erstattes med arbeidsavklaringspenger, en ytelse hvor det også legges vekt på aktivitet. Samtidig innføres arbeidsevnevurdering med full tyngde som arbeidsmetode internt i NAV. På yrkesskadeområdet har det skjedd få endringer, men organiseringen av yrkesskadeordningen i Norge er under utredning. Samhandling med og kompetansetilbud til sykmeldere er gjennomført i de siste årene. Det er også utviklet statistikk over sykmeldinger skrevet ut av fastleger, et verktøy som kan benyttes i dialog med den enkelte fastlege. Fortsatt er mange sykmeldt eller på varige ytelser. Årsakene til dette er sammensatte. Det er behov for videre forskning på folketrygdens områder. Damberg G. "From inactivity to action" - a review of development and changes in the national insurance scheme in recent years. Nor J Epidemiol 2009; 19 (2: 139-146. ENGLISH SUMMARYRecent years have seen major changes within

  13. Comparison of alcoholic fermentation performance of the free and immobilized yeast on water hyacinth stem pieces in medium with different glucose contents.

    Science.gov (United States)

    Tran, Van Nguyen; Le, Van Viet Man

    2014-01-01

    Ethanol fermentation with Saccharomyces cerevisiae cells was performed in medium with different glucose concentrations. As the glucose content augmented from 200 to 250 g/L, the growth of the immobilized cells did not change while that of the free cells was reduced. At higher glucose concentration (300, 350, and 400 g/L), the cell proliferation significantly decreased and the residual sugar level sharply augmented for both the immobilized and free yeast. The specific growth rate of the immobilized cells was 27–65 % higher than that of the free cells, and the final ethanol concentration in the immobilized yeast cultures was 9.7–18.5 % higher than that in the free yeast cultures. However, the immobilized yeast demonstrated similar or slightly lower ethanol yield in comparison with the free yeast. High fermentation rate of the immobilized yeast was associated with low unsaturation degree of fatty acids in cellular membrane. Adsorption of S. cerevisiae cells on water hyacinth stem pieces in the nutritional medium decreased the unsaturation degree of membrane lipid and the immobilized yeast always exhibited lower unsaturation degree of membrane lipid than the free yeast in ethanol fermentation.

  14. Determination and Visualization of pH Values in Anaerobic Digestion of Water Hyacinth and Rice Straw Mixtures Using Hyperspectral Imaging with Wavelet Transform Denoising and Variable Selection

    Directory of Open Access Journals (Sweden)

    Chu Zhang

    2016-02-01

    Full Text Available Biomass energy represents a huge supplement for meeting current energy demands. A hyperspectral imaging system covering the spectral range of 874–1734 nm was used to determine the pH value of anaerobic digestion liquid produced by water hyacinth and rice straw mixtures used for methane production. Wavelet transform (WT was used to reduce noises of the spectral data. Successive projections algorithm (SPA, random frog (RF and variable importance in projection (VIP were used to select 8, 15 and 20 optimal wavelengths for the pH value prediction, respectively. Partial least squares (PLS and a back propagation neural network (BPNN were used to build the calibration models on the full spectra and the optimal wavelengths. As a result, BPNN models performed better than the corresponding PLS models, and SPA-BPNN model gave the best performance with a correlation coefficient of prediction (rp of 0.911 and root mean square error of prediction (RMSEP of 0.0516. The results indicated the feasibility of using hyperspectral imaging to determine pH values during anaerobic digestion. Furthermore, a distribution map of the pH values was achieved by applying the SPA-BPNN model. The results in this study would help to develop an on-line monitoring system for biomass energy producing process by hyperspectral imaging.

  15. Removal of Pb(II) ions from aqueous solution using water hyacinth root by fixed-bed column and ANN modeling.

    Science.gov (United States)

    Mitra, Tania; Singha, Biswajit; Bar, Nirjhar; Das, Sudip Kumar

    2014-05-30

    Hyacinth root was used as a biosorbent for generating adsorption data in fixed-bed glass column. The influence of different operating parameters like inlet Pb(II) ion concentration, liquid flow rate and bed height on the breakthrough curves and the performance of the column was studied. The result showed that the adsorption efficiency increased with increase in bed height and decreased with increase in inlet Pb(II) ion concentration and flow rate. Increasing the flow rate resulted in shorter time for bed saturation. The result showed that as the bed height increased the availability of more number of adsorption sites in the bed increased, hence the throughput volume of the aqueous solution also increased. The adsorption kinetics was analyzed using different models. It was observed that maximum adsorption capacity increased with increase in flow rate and initial Pb(II) ion concentration but decreased with increase in bed height. Applicability of artificial neural network (ANN) modeling for the prediction of Pb(II) ion removal was also reported by using multilayer perceptron with backpropagation, Levenberg-Marquardt and scaled conjugate algorithms and four different transfer functions in a hidden layer and a linear output transfer function.

  16. Composition of Periphyton Community on Water Hyacinth (Eichhornia crassipes: In Analysis of Environmental Characteristics at Ejirin Part of Epe Lagoon in Southwestern Nigeria

    Directory of Open Access Journals (Sweden)

    A. I. Inyang

    2015-01-01

    Full Text Available The composition of periphyton community on water hyacinth was investigated at Ejirin, part of Epe Lagoon, in relation to environmental characteristics from December 2012 to May 2013. A total of 14,536 individuals of 104 species belonging to five divisions were identified, with Bacillariophyta (82.69%, Cyanobacteria (10.43%, Chlorophyta (5.63%, and Euglenophyta (1.15%. The total species abundance observed showed a strong correlation with rainfall (r = 0.745 and strongly significant correlation with TDS (r=0.836*; P >0.05. Biochemical oxygen demand value remained (BOD ≤ 4.8 mg/L while Shannon-Wiener index value remained (Hs ≤ 1.47. The presence of the following organisms could be used as an indicator of environmentally stressed aquatic ecosystem: euglenoids, blue green algae, Nitzschia palea, Surirella sp., Pinnularia sp., Gomphonema parvulum, Mougeotia sp., Spirogyra sp., Trachelomonas affinis (Lemm., and T. ensifera Daday; T. gibberosa Playf. and Phormidium articulatum; Lyngbya intermedia; Cymbella ventricosa; Eunotia arcus; Surirella linearis and Closterium parvulum Nag.

  17. 微光波对水葫芦水解糖化的促进机理研究%Promotion mechanisms of microwave and lightwave pretreatments on enzymatic saccharification of water hyacinth

    Institute of Scientific and Technical Information of China (English)

    程军; 俞聪; 宋文路; 周俊虎; 岑可法

    2009-01-01

    利用色质联机和扫描电镜等微观分析手段,研究了微波时间、功率和光波组合等对水葫芦理化性质、还原糖产量和水解副产物的影响规律.水葫芦叶子经过蒸汽加热和NaOH预处理后,酶水解的还原糖产量仅为23.9 mg(每100 mg底物);而联合了微光波预处理后,可提高到31.1 mg(每100 mg底物),使还原糖产量提高了30.1%.在微波和光波组合比例为30∶70(总功率700 W)、加热时间1 min时,得到了55.4%的理论最大还原糖产量.当微波功率过高或时间过长时,在预处理阶段由半纤维素水解生成的大量木糖进一步分解,导致乙酸、丁酮和糠醛等有害小分子副产物增加,对后期酶水解糖化和发酵产酒精造成不利影响.%The gas chromatography-mass spectrometry (GC-MS) and scanning electron microscope (SEM) were used to study the effects of microwave time, power and combination with lightwave on the hyacinth (eichhornia crassipes) physicochemical properties, reducing sugar yields and hydrolysis byproducts. The reducing sugar yield of only 23.9 mg/100 mg hyacinth leave in the enzymatic hydrolysis was obtained when it was pretreated with the steam explosion and NaOH solution. The reducing sugar yield was increased by 30.1% to 31.1 mg/100 mg hyacinth leave when the microwave and lightwave pretreatments were additionally employed. The 55.4% of potential maximum sugars was released when the hyacinth leave was pretreated with the power ratio of microwave to lingtwave at 30∶70 (total power is 700 W) for 1 min. When the microwave power was higher and time was longer, more hydrolysis byproducts such as acetic acid, butanone and furfural were produced due to the further decomposition of the xylose derived from the hemicellulose hydrolysis, which was harmful to the following enzymatic saccharification and fermentative ethanol fuel.

  18. 生活垃圾协同水葫芦干式厌氧发酵制沼气的研究%Dry Anaerobic Co-digestion of Water Hyacinth and Municipal Solid Waste

    Institute of Scientific and Technical Information of China (English)

    王林; 陈砺; 严宗诚; 王红林; 黄和茂

    2013-01-01

    Feasibility of anaerobic co-digestion of water hyacinth and municipal solid waste (MSW) under mesophilic conditions was investigated.Effects of total solid (TS),inoculum ratio (IR) and water hyacinth ratio (WR) on anaerobic digestion process were studied.Results showed that adding 5% water hyacinth to MSW anaerobic digestion system could effectively prevent the impact on the system pH value caused by variations of TS and IR,shorten the lag phase,centralize the biogas yield peak and enhance biogas production.But the biogas production decreased when WR increased to 10%.Volatile solid (VS) degradation rates of all experiments were between 38.18% and 58.10% after 70d anaerobic digestion.Orthogonal experiment results indicated that the optimum process conditions were TS 23%,IR 100% and WR 5% for the anaerobic co-digestion of water hyacinth and MSW.%探讨了水葫芦和生活垃圾在中温条件下联合发酵的可行性,研究了系统总固体含量(TS)、发酵母液添加比例(IR)以及水葫芦添加比例(WR)对厌氧发酵过程的影响.试验结果表明,添加5%的水葫芦能够有效防止因TS和IR的变化对系统pH值所带来的影响,缩短发酵启动时间,使产气高峰集中出现,并提高产气量.但是当水葫芦添加比例增加到10%时,沼气产量反而下降.发酵70d后,挥发性固体(VS)降解率为38.18%~58.10%.通过对正交试验结果进行分析,得到水葫芦与生活垃圾联合发酵制沼气的较优工艺条件为:系统总固体含量23%,发酵母液添加比例100%,水葫芦添加比例5%.

  19. Comparison of photosynthetic eco-functions of water hyacinth and their environmental factors in different areas%不同地区凤眼莲的光合生态功能型及其生态影响因子

    Institute of Scientific and Technical Information of China (English)

    李霞; 任承钢; 王满; 丛伟; 盛婧; 朱普平; 郑建初; 严少华

    2011-01-01

    以江苏省农业科学院太湖雪堰、南京和滇池白山湾的试验点内种养的凤眼莲为研究材料,在相同种养时间内,统一测定不同地区植株的株高和干重的变化及不同叶位光合参数和光合功能叶片的光合—光响应曲线等,以期阐明不同生态区凤眼莲株型特征形成的生态生理机制,并为不同地区人工放养凤眼莲的高产栽培提供理论参考和技术支持.结果表明:(1)不同地区种养的凤眼莲株型有较大差异,滇池的为短地上部分和长根的株型,其茎叶长/根长为0.4土0.1;南京的为中等长度的地上部分和短根的株型,其茎叶长/根长为7.1±0 3;太湖的为长地上部分和中等根长的株型,其茎叶长/根长为2.0±0.2.(2)形态有差异的不同地区凤眼莲植株的光合表现存在差异,与南京和滇池地区的相比,太湖凤眼莲不同叶位的净光合速率(Pn)最高(25.9~35.3μmol.m-2·s-1);相关性分析表明,南京凤眼莲的Pn与其相对湿度呈极显著负相关(r=-0.831**,n=6),滇池凤眼莲的Pn与气孔导度呈显著正相关(r=0.769*,n=6),太湖凤眼莲的相对湿度与叶片蒸腾速率呈显著负相关(r=-0.818*,n=6).可见影响不同地区Pn的外界因子有差异,但除外界光强外,相对湿度也是影响其Pn高低的重要生态因子.(3)不同生态地区形态有差异的植株己形成了相应的光合潜力,生长能力最强的太湖地区植株,光合能力也最强,Pmax最大(36.29±1.21μmol·m-2·s-1)且光饱和点最高(LSP,2 350.0±69.0 μmol·m-2·s-1);相关性分析进一步表明,株高和光补偿点(LCP)以及茎叶长度与光饱和点均呈显著正相关,相关系数分别为r=0.998*、r=0.997*(n=10).本研究可为不同地区利用凤眼莲净化富营养水域的高产栽培提供参考.%Eichhornia crassipes Solms, commonly known as water hyacinth, is a bundler aquatic plant. It is widely used in sewage purification due to its well developed root system

  20. Recovering biomethane and nutrients from anaerobic digestion of water hyacinth (Eichhornia crassipes) and its co-digestion with fruit and vegetable waste.

    Science.gov (United States)

    Hernández-Shek, M A; Cadavid-Rodríguez, L S; Bolaños, I V; Agudelo-Henao, A C

    2016-01-01

    The potential to recover bioenergy from anaerobic digestion of water hyacinth (WH) and from its co-digestion with fruit and vegetable waste (FVW) was investigated. Initially, biogas and methane production were studied using the biochemical methane potential (BMP) test at 2 g volatile solids (VS) L(-1) of substrate concentration, both in the digestion of WH alone and in its co-digestion with FVW (WH-FVW ratio of 70:30). Subsequently, the biogas production was optimized in terms of total solids (TS) concentration, testing 4 and 6% of TS. The BMP test showed a biogas yield of 0.114 m(3) biogas kg(-1) VSadded for WH alone. On the other hand, the biogas potential from the WH-FVW co-digestion was 0.141 m(3) biogas kg(-1) VSadded, showing an increase of 23% compared to that of WH alone. Maximum biogas production of 0.230 m(3) biogas kg(-1) VSadded was obtained at 4% of TS in the co-digestion of WH-FVW. Using semi-continuously stirred tank reactors, 1.3 m(3) biogas yield kg(-1) VSadded was produced using an organic loading rate of 2 kg VS m(-3) d(-1) and hydraulic retention time of 15 days. It was also found that a WH-FVW ratio of 80:20 improved the process in terms of pH stability. Additionally, it was found that nitrogen can be recovered in the liquid effluent with a potential for use as a liquid fertilizer.

  1. Muusika : Brahmsi reekviem Tõnu Kaljustega. Rahvusooperi nõukogus. Võimalus veeta õhtu La Scalas. Rene Eespere uus CD. Jukka Savijoki käis Eestis. Võistlesid pianistid. Jõulukontserdid / Peeter Olesk

    Index Scriptorium Estoniae

    Olesk, Peeter, 1953-

    2001-01-01

    Tõnu Kaljuste juhatab Ljubljana Gallus Hallis Johannes Brahmsi "Saksa reekviemi". EMA kuratooriumi ja rahvusooperi Estonia nõukogu arutasid ühisistungil Eesti ooperikunsti, muusikateatri ja kõrgema muusikalise hariduse probleeme. 7. XII kell 19.00 saab "Klassikaraadiost" kuulata Milano La Scala hooaja avaetenduse otseülekannet. Antese väljaandel ilmus CD Rene Eespere kammerteostega. 29.XI ئ 2.XII viibis Eestis Sibeliuse akadeemia klassikalise kitarri õppejõud Jukka Savijoki. 23. ja 24. XI toimus Tartus kolme keskastme muusikakooli noorte pianistide konkurss. 8.XII toimub EMA kammersaalis suur jõulukontsert, kus esinevad parimad EMA üliõpilased. Kontserdiagentuuri Concerto Grosso sari "Advendiaeg poistekooridega" viib kontserte Eestimaa erinevatesse linnadesse. Plaadi "Kahest üks" esitluskontserdiga, kus tuleb esiettekandele Urmas Sisaski kantaat "Armastusesle", tähistab TTÜ Akadeemiline Naiskoor oma 50. aastapäeva . Eesti Naistelaulu Seltsi korraldusel toimus 2. XII Balti Misjonikeskuses Tallinna naiskooride advendikontsert. 28. XI toimus Estonia talveaias Tarmo Lepiku 55. sünniaastapäevale pühendatud mälestuskontsert. 17.XI toimus Põlva kultuuri ja huvikeskuses VII Lõuna-Eesti meestelaulu päev

  2. High-frequency high-spatial resolution US in transplanted kidney in pediatric patients; Studio ecografico con sonda con alta frequenza ed elevata risoluzione spaziale nella valutazione del rene trapiantato nell'eta' pediatrica

    Energy Technology Data Exchange (ETDEWEB)

    Amodio, F.; Rossi, E.; Carbone, M.; Brunese, L.; Tamasi, S.; Vallone, G. [Neaples Univ. Federico 2, Neaples (Italy). Dipt. di Scienze Biomorfologiche e Funzionali; Mansueto, G.; Somma, P. [Neaples Univ. Federico 2, Neaples (Italy). Sezione di Anatomia Patologica e Citopatologica

    2000-02-01

    In this paper it is presented the role power Doppler US with a high-frequency and high-resolution of interlobular arterioles in patients with normally functioning renal transplants or with chronic rejection. 15 patients (mean age 15 years; range 10-18 years) were examined with a General Electric 500 MD unit using 7.5 and 13 MHz linear transducers. In all the patients serum creatinine and diuresis were evaluated; 4 patients underwent US-guided biopsy that resulted in the diagnosis of chronic rejection. Normally functioning renal transplants were found in 11 patients and chronic rejection was seen in 4. In normally functioning renal transplants, interlobular vessels could be depicted as cortical blush with the 7.5 MHz transducer; in the same patients power Doppler US with the 13 MHz transducer permitted a correct evaluation of interlobular vessels that were arranged in series like a palisade. In chronic rejection power Doppler US with the 13 MHz transducer better depicted cortical vascularity and showed irregular, narrow arteries. Power Doppler US with a 13 MHz transducer is particularly useful in children after renal transplants due to their reduced tissutal thickness. The lateral resolution of 13 MHz transducers (<0.3 mm) allows to separate interlobular vessels from each other and the high frequency of the probe can depict interlobular vessels in the peripheral cortex. The optimal visualization of cortical vascularity with a 13 MHz transducer allows early detection of chronic rejection. [Italian] Si valuta la sensibilita' del power Doppler con sonda con alta frequenza ed elevata risoluzione spaziale (13 MHz) nella visualizzazione della vascolarizzazione corticale del rene trapiantato normo-funzionante e nel rigetto cronico nell'eta' pediatrica. Quindici pazienti (10 maschi/5 femmine) con eta' media di 15 anni (intervallo 10-18 anni) sono stati esaminati con ecografo MD 500 mediante sonda da 7,5 e 13 MHz con color e power Doppler. Tutti i

  3. 生物添加剂对水葫芦与甜玉米秸秆混合青贮品质的影响%Effects of biological additives on the quality of water hyacinth and maize straw mixed silage

    Institute of Scientific and Technical Information of China (English)

    陈鑫珠; 庄益芬; 张建国; 廖惠珍; 张文昌; 张兆阳; 陈庆达

    2011-01-01

    本研究设计了4种混合比例的水葫芦玉米秸秆混合青贮,即水葫芦:玉米秸秆按鲜重比为8:2,7:3,6:4和5:5(略为W8M2、W7M3、W6M4和W5 M5),探讨生物添加剂绿汁发酵液(FGJ)、纤维素酶(CEL)和绿汁发酵液+纤维素酶(MIX)的效果.每个处理3次重复,常温下贮存60 d,开封后评定其青贮品质.结果表明,3种添加剂对不同混合比例的材料均能显著(P<0.05)提高其青贮品质,特别是绿汁发酵液和纤维素酶的混合添加,具有相乘作用,效果更好.随着玉米秸秆混合比例的升高,青贮品质提高,W5M5的效果最好.%In order to investigate the effects of biological additives on the quality of mixing water hyacinth and maize stalk, four mixture ratios of water hyacinth and maize stalk at 8:2, 7:3, 6:4 and 5: 5 (W8M2, W7M3, W6M4 and W5M5) were designed. In addition, no-additive, fermented green juice (FGJ), cellulase (CEL) and FGJ + CEL (MIX) were added for all materials. After ensiled for 60 days at ambient temperature, the nutritional composition were measured for each treatment. Three kinds of additives significant improved the fermentation quality of water hyacinth and maize straw mixed silages (P<0.05). FGJ and CEL also had obvious interaction. In addition, with the increase of corn straw mixture ratio, the quality of silage was improved. W5M5 was the best silage.

  4. 水葫芦与甜玉米秸秆混合半干青贮的研究%The mixing silage of water hyacinth and maize straw under the low moisture conditions

    Institute of Scientific and Technical Information of China (English)

    陈鑫珠; 庄益芬; 张建国; 廖惠珍

    2011-01-01

    Three mixture ratios of water hyacinth (Eichhornia crassipes) and maize (Zea mays) stalk at 9 : 1, 8 : 2 and 7 : 3 (W9M1, W8M2 and W7M3) with the addition of no-additive, fermented green juice (FGJ), formic acid and foraform (FOR), were designed to investigate the effects of mixing ensilage of wa- ter hyacinth and maize stalk on the fermentation quality in this study. The nutritional compositions were measured for each treatment after ensiling for 60 days at ambient temperature. This study showed that three kinds of additives significantly improved the fermentation quality of mixing silages of water hyacinth and maize straw (P〈0.01). W9M1 was the best and had higher DM recovery than W8M2 and W7M3 did (P〈0.05). The WSC contents of no-additive and FGJ in WTM3 was significantly higher than those in W9M1 and W8M2 (P〈0.01).%本试验设3种比例的混合青贮,即水葫芦(Eichhorniacrassipes):甜玉米(Zeamays)秸秆按鲜质量比为9:l、8:2和7:3(W9M1、W8M2和w7M3)混合,并在每种混合比例中设无添加(CK)、添加2mL/kg绿汁发酵液(FGD、添加3mL/kg蚁酸(FA)和添加3mL/kg四蚁酸铵(FOR)4个处理,探讨混合比例和添加剂对水葫芦与甜玉米秸秆混合半千青贮发酵品质的影响。每个处理3次重复,常温下贮存60d,开封后评定其青贮品质。结果表明,3种添加剂均能显著(P〈0.05)提高不同混合比

  5. Biomagnification of Heavy Metals during Vemicomposting of Water Hyacinth by Earthworm%蚯蚓堆制技术处理水葫芦过程中的重金属生物放大作用

    Institute of Scientific and Technical Information of China (English)

    周娟娟; 李战军

    2012-01-01

    水葫芦对重金属有较强的生物富集作用.在利用蚯蚓堆制技术处理水葫芦时,蚯蚓可通过生物放大作用进一步累积重金属.为了研究蚯蚓堆制技术处理水葫芦过程中,蚯蚓对重金属的富集规律,测定了模拟废水中生长的水葫芦茎叶部和根部的Cd(Ⅱ),Cr(Ⅵ),Pb(Ⅱ),Cu(Ⅱ),Ni(Ⅱ)含量,研究了蚯蚓堆制处理水葫芦茎叶过程中蚯蚓蚓体和蚓粪中的重金属含量.研究结果表明,术葫芦虽然可富集重金属,但主要集中在根部,茎叶部含量较少,以茎叶部饲养蚯蚓是较为安全的.当以茎叶部饲养蚯蚓时,受重金属污染的水葫芦可导致蚯蚓生长速率下降.但蚯蚓对重金属有一定耐受力,蚓粪中重金属含量远大于蚯蚓蚓体中的含量.%Heavy metals could be bio-concentrated by water hyacinth and might be further cumulated by earthworm via the bio-magnification effect during vemicomposting. In order to realize the biomagnification of heavy metals, the concentrations of Cd(II),Cr(VI),Pb(II),Cu(ir),Ni(II) in the leaves and root of water hyacinth cultured in simulated wastewaler, earthworms, and worrodung were tested. Hie results indicated that heavy metals could be bio-concentrated by water hyacinth and the growth rate of earthworms was decreased when the heavy meatals concentrations increased. Nevertheless, most of the heavy metals were distributed in the root. So it was relatively safe to feed earthworms with the leaves. Moreover, earthworms were somewhat patient towards low levels of heavy metals while most of the heavy metals were retained in their dung.

  6. Changes in enzymatic activities and microbial properties in vermicompost of water hyacinth as affected by pre-composting and fungal inoculation: a comparative study of ergosterol and chitin for estimating fungal biomass.

    Science.gov (United States)

    Pramanik, P

    2010-01-01

    In this experiment, three different fungal species, viz. Trichoderma viridae, Aspergillus niger and Phanerochaete chrysosporium, were inoculated in 7 day and 15 day partially decomposed water hyacinth to study their effect on enzymatic activities, microbial respiration and fungal biomass of the final stabilized product. The results suggested that increasing the duration of pre-composting from 7 days to 15 days did not show any significant effect on the activities of hydrolytic enzymes. Inoculation of fungi significantly (P vermicomposts. Inoculation of P. chrysosporium in initial organic waste registered the highest chitin content in vermicompost. A comparison of fungal biomass and chitin content revealed a conversion factor of 2.628 with a standard deviation of 0.318. Due to significant correlation (r = 0.864), this conversion factor allows for the calculation of fungal biomass from chitin, which is comparatively more stable than ergosterol.

  7. 水葫芦与玉米秸秆混合青贮向研究%Use of Mixed Silage of Water Hyacinth and Corn Straw as Feed Sources

    Institute of Scientific and Technical Information of China (English)

    庄益芬; 陈鑫珠; 廖惠珍; 张文昌

    2011-01-01

    本试验旨在利用水葫芦(water hyacinth)调制出优质青贮.试验共分24(2×3×4)个处理,每个处理3个重复,以2种水分(约40%和50%)的原料,按3种混合比例(晾晒后的水葫芦与玉米秸秆质量比分别为9∶1、8∶2和7∶3)制成共6种原料混合物,每种混合物中不添加或分别添加2 mL/kg绿汁发酵液、3 mL/kg蚁酸和3mL/kg四蚁酸铵后进行青贮.常温发酵60 d,测定青贮的pH、氨态氮浓度以及乳酸、乙酸、丙酸和丁酸的含量.结果表明:降低原料水分显著提高了青贮的pH(P<0.05)、显著减少了乳酸生成(P<0.05);随玉米秸秆比例的升高,青贮pH有不同程度的下降;3种添加剂也都不同程度地改善了青贮品质.综合而言,原料水分50%、水葫芦与玉米秸秆混合比例7∶3,并以绿汁发酵液作为添加剂的青贮的品质最优.%The study was conducted to produce high quality silage with water hyacinth. It consisted of 24 (2 × 3×4) treatments with 3 replicates in each, six kinds of mixture were made from ingredients with two moistures (about 40% and 50% ) according to three mixed ratios (mass of water hyacinth and corn straw after dried in the sun were 9:1, 8:2 and 7:3). After supplemented with no additive, 2 mL/kg fermented green juice, 3 mL/kg formic acid and 3 mL/kg foraform, respectively, the mixture were fermented. The fermentation las ted for 60 d in normal temperature. Silages were determined for pH, ammoniacal nitrogen ( NH3-N) concen tration , contents of lactic acid, acetic acid, propionic acid and butyric acid. The results showed as follows: the decreasing of moisture of ingredients significantly increased the pH (P <0.05), but significantly decreased the production of lactic acid (P<0.05)in silages; with the increasing of corn straw' s rate, the pH of silage de creased at different levels; supplementation of the three additives also improved the quality of silages in varying degrees. In conclusion, the mixed silage

  8. Karyotype description of two Neotropical Psittacidae species: the endangered Hyacinth Macaw, Anodorhynchus hyacinthinus, and the Hawk-headed Parrot, Deroptyus accipitrinus (Psittaciformes: Aves, and its significance for conservation plans

    Directory of Open Access Journals (Sweden)

    Vitor de Oliveira Lunardi

    2003-01-01

    Full Text Available Neotropical parrots are among the most threatened groups of birds in the world, and many species are facing extinction in a near future. At the same time, the taxonomic position of many species remains unclear. Karyotype analysis has been used to elucidate the phylogenetic status of many bird groups, also providing important information for both in situ and ex situ conservation plans. The objective of the present study was to describe for the first time the karyotypes of the endangered Hyacinth Macaw, Anodorhynchus hyacinthinus, and of the Hawk-headed Parrot, Deroptyus accipitrinus. A diploid number of 2n = 70 and a karyotype similar to the main pattern previously found for the genera Ara, Cyanopsitta, Aratinga, Propyrrhura, Pionites, Pionopsitta, Nandayus, and Guaruba were found for both species. These karyotype descriptions can be a starting point for the genetic monitoring of these two declining species.

  9. NiSe@NiOOH Core-Shell Hyacinth-like Nanostructures on Nickel Foam Synthesized by in Situ Electrochemical Oxidation as an Efficient Electrocatalyst for the Oxygen Evolution Reaction.

    Science.gov (United States)

    Li, Xiao; Han, Guan-Qun; Liu, Yan-Ru; Dong, Bin; Hu, Wen-Hui; Shang, Xiao; Chai, Yong-Ming; Liu, Chen-Guang

    2016-08-10

    NiSe@NiOOH core-shell hyacinth-like nanostructures supported on nickel foam (NF) have been successfully synthesized by a facile solvothermal selenization and subsequent in situ electrochemical oxidation (ISEO). First, the unique NiSe/NF nanopillar arrays were prepared in N,N-dimethylformamide (DMF) as a precursor template that can provide a large surface area, excellent conductivity, and robust support. Next, amorphous NiOOH covering the surface of NiSe nanopillars was fabricated by ISEO, as confirmed by XPS andEDX spectroscopy. SEM images revealed the hyacinth-like morphology of NiSe@NiOOH/NF with NiOOH as the shell and NiSe as the core. The electrochemical performance of NiSe@NiOOH/NF for the oxygen evolution reaction (OER) was investigated. NiSe@NiOOH/NF demonstrates an obviously enhanced OER activity with much lower overpotential of 332 mV at 50 mA cm(-2) compared to other Ni-based electrocatalysts. The low charge-transfer resistance (Rct), large electrochemical double-layer capacitance (Cdl) of electrochemically active surface areas (ECSAs), and excellent long-term stability of NiSe@NiOOH/NF confirm the enhancement of its electrochemical performance for the OER, which can be ascribed to the large amount of active sites derived from the amorphous NiOOH shell and the good conductivity and stability derived from the NiSe core. In addition, the synergistic effect between the NiSe core and NiOOH shell could serve for a highly efficient OER electrocatalyst.

  10. Digestibilidade aparente da farinha de aguapé em tilápias-do-nilo Apparent digestibility of water hyacinth meal by Nile tilapia

    Directory of Open Access Journals (Sweden)

    José Francisco Vicente Biudes

    2009-11-01

    Full Text Available Objetivou-se com este trabalho determinar e comparar as digestibilidades aparentes da matéria seca (MS, proteína bruta (PB, extrato etéreo (EE e energia bruta (EB e as disponibilidades aparentes de minerais das farinhas da biomassa emersa (lâmina foliar e pecíolo, submersa (raiz e rizoma e total do aguapé em tilápias-do-nilo (Oreochromis niloticus. Foram elaboradas quatro rações marcadas com 0,10% de óxido de crômio-III (uma ração-referência purificada e três contendo 30,0% de cada ingrediente. As tilápias-do-nilo (125,5 ± 10,5 g foram alimentadas até a saciedade e a coleta de fezes foi realizada pelo sistema Ghelph modificado. As digestibilidades aparentes da farinha da biomassa emersa (MS = 57,8; PB = 72,3; EE = 63,2 e EB = 62,0% foram maiores que as das farinhas da biomassa total (MS = 45,7; PB = 57,3; EE = 50,3 e EB = 42,3% e submersa (MS = 38,3; PB = 50,8; EE = 43,5 e EB = 32,0%. As disponibilidades aparentes de fósforo (P, cálcio (Ca, magnésio (Mg, manganês (Mn, cobre (Cu e zinco (Zn da farinha da biomassa emersa também foram maiores. A farinha de biomassa emersa do aguapé apresenta melhor digestibilidade e disponibilidade aparente dos nutrientes em comparação às farinhas da biomassa total e submersa.This study was carried out to determine and compare the apparent digestibility of dry matter (DM, crude protein (CP, crude fat (CF, gross energy (GE, and the apparent availability of minerals (P, Ca, Mg, Mn, Cu, and Zn of emergent (leaf and petiole, submerged (root and rhizome and total biomass meal of water hyacinth for Nile tilapia. Four diets were prepared, containing 0.10% chromic oxide-III, one being the reference diet (purified and the others containing 30% of each ingredient. The Nile tilapias (125.5 ± 10.5 g were fed until satiation and the feces were collected by the modified Guelph system. The apparent digestibility of emergent biomass meal (DM = 57.8, CP = 72.3, CF = 63.2, and GE = 62.0% was higher than

  11. Novaja jadernaja ugroza / Louis-Rene Beres

    Index Scriptorium Estoniae

    Beres, Louis-Rene

    2007-01-01

    Tänapäeval võib terroristide käsutuses olla nii tuumarelv kui ka teisi massihävitusrelvi ning sellest tingituna on vaja ka uut julgeolekustrateegiat. On tulnud aeg välja töötada kaasaegne Manhattani projekti analoog

  12. Intervjuu kunstikogujaga / Rene Kuulmann ; intervjueerinud Jaak Visnap

    Index Scriptorium Estoniae

    Kuulmann, Rene, 1969-

    2011-01-01

    Kaasaegse kunsti kogumisest, kunsti ja kunstnike valikust, Laurentsiuse loominguni ja tema tööde kogumiseni jõudmisest, Eesti kunstiturust, kunstniku rollist tänapäeva maailmas, kunsti kogumise eesmärgist

  13. Tallinna kultuurivabrik / Indrek Peil, Rene Valner

    Index Scriptorium Estoniae

    Peil, Indrek

    2000-01-01

    Arhitektuuriworkshop "Symbiosis factory" 6.-10. I 2000 Tallinna Tselluloosikombinaadis. Osalesid Eesti Kunstiakadeemia arhitektuuritudengid ja arhitektid büroodest Kolm Pluss Üks, Alver Trummal Arhitektid, Arhitektuuriagentuur, COO Arhitektid, Mark & Tamm. 13 ill

  14. Renee Vilbrel tagataskus uued filmid / Uwe Gnadenteich

    Index Scriptorium Estoniae

    Gnadenteich, Uwe

    2005-01-01

    Täispikk lastefilm "Röövlirahnu Martin" : stsenaristid Mihkel Ulman, Kristian Taska, R. Vilbre, produtsent ja operaator Manfred Vainokivi : Parunid ja Vonid, Taska Film, Amrion 2005. Ka uutest projektidest

  15. Flaskevand - den rene vare i brandingens tidsalder

    DEFF Research Database (Denmark)

    Hermansen, Judy

    2008-01-01

    At tappe vand på flasker er blevet den mest udbredte globale virksomhed overhovedet, og forbruget af flaskevand stiger fortsat hurtigt - især i lande hvor man kan få rent drikkevand direkte fra hanen gratis eller til en meget billig penge. Hvorfor er vi havnet i sådan et tilsyneladende paradoksal...

  16. Novaja jadernaja ugroza / Louis-Rene Beres

    Index Scriptorium Estoniae

    Beres, Louis-Rene

    2007-01-01

    Tänapäeval võib terroristide käsutuses olla nii tuumarelv kui ka teisi massihävitusrelvi ning sellest tingituna on vaja ka uut julgeolekustrateegiat. On tulnud aeg välja töötada kaasaegne Manhattani projekti analoog

  17. Water hyacinth biomass stabilization by its composting with swine wasterwater and slaugther house wasters / Estabilização da biomassa de aguapé através da compostagem com águas resíduárias de suínos e resíduos de frigorífico

    Directory of Open Access Journals (Sweden)

    Silvio César Sampaio

    2009-10-01

    Full Text Available The objective of the present research was to evaluate the composting of water hyacinth (E. crassipes biomass, after its usage for the removal of pollutants from the effluent of a swine slaughter house wastewater treatment system, recycling the waste water used for swine transportation trucks and piggery hygienic cleaning and the cellulosic gut generated in the sausage processing . The composting was evaluated by building eight composting piles measuring approximately 0,60m3 each; the piles consisted of four distinct treatments that were done twice. The treatments were: T1 – Water hyacinth (E. crassipes, T2 – Water hyacinth and swine excrement, T3 – Water hyacinth, swine excrement and earth, T4 – Water hyacinth, swine excrement and cellulosic gut, for a period of 90 days. Considering the C:N ratio as a compost maturity indicator, it was observed that the T4 treatment (water hyacinth, excrement and cellulosic gut had the shorter period of stabilization, 60 days. Regarding the biostabilization rate, the statistic analysis showed that there was no significant difference at 5% level by the F test between the four treatments evaluated during 90 days. The total organic carbon and the nitrogen biostabilization average rates were 1,8x10-2 day-1 and 0,8x10-3 day-1, respectively. O presente trabalho teve por objetivo avaliar a compostagem da biomassa de aguapé (E. crassipes, após sua utilização na remoção de poluentes em sistema de tratamento de efluente de uma Unidade Frigorífica de suínos, com o aproveitamento de águas residuárias provenientes da higienização de pocilgas e dos caminhões que transportam os suínos, e das tripas celulósicas geradas no processamento de salsichas. Avaliou-se a compostagem, montando-se oito leiras com aproximadamente 0,60m3, com quatro tratamentos distintos e duas repetições, sendo: T1 – Aguapé (E. crassipes, T2 – Aguapé e dejeto suíno, T3 – Aguapé, dejeto suíno e terra, T4 – Aguap

  18. Sensibilidade a herbicidas de acessos de aguapé coletados em reservatórios do Estado de São Paulo Chemical control of different water hyacinth accesses

    Directory of Open Access Journals (Sweden)

    L.R. Cardoso

    2003-01-01

    Full Text Available Com o objetivo de avaliar o efeito de herbicidas em diferentes acessos de aguapé coletados em reservatórios de hidrelétricas do Estado de São Paulo, foi realizado um estudo no Núcleo de Pesquisas Avançadas em Matologia da FCA-UNESP, campus de Botucatu. A escolha das plantas geneticamente diferentes foi feita com base em estudos de variabilidade genética, nos quais se utilizou a técnica de RAPD. Avaliou-se o efeito dos herbicidas imazapyr nas doses de 62,5 e 125,0 g e.a. ha-1, glyphosate a 1.680 e 3.360 g e.a. ha-1 + 0,5% V/V de Extravon, diquat a 480 e 960 g i.a. ha-1 e 2,4-D a 670 e 1.340 g e.a. ha-1. Os seis acessos escolhidos foram colocados em caixas plásticas de 28,0 x 14,0 x 12,0 cm, contendo 4 litros de água. A aplicação dos produtos foi realizada com um simulador de pulverização pressurizado com ar comprimido, equipado com barra de aplicação com quatro bicos de jato plano Teejet 110.02 VS. A pressão constante de trabalho foi de 1,6 bar, e o consumo de calda, de 193 L ha-1. A velocidade de aplicação foi de 3,69 km h-1. Durante as aplicações, a temperatura do ar foi de 25 ºC e a umidade relativa de 73%. Foram realizadas avaliações visuais de controle aos 3, 5, 7, 11, 21 e 28 dias, nas quais 0 consistiu em nenhum controle e 100 em morte de plantas. Todos os herbicidas e doses testados proporcionaram controle eficiente das plantas de aguapé, e os seis acessos estudados responderam de forma semelhante.A study was carried out at the Advanced Weed Science Research Nucleus , UNESP/Botucatu, to verify the effect of herbicides on different collected accesses of water hyacinth in hydroelectric reservoirs in São Paulo. The different genetic materials were chosen based on studies of genetic variability, using the RAPD technique. The herbicides and rates evaluated were imazapyr at 62.5 and 125.0g a.e. ha-1, glyphosate at 480 and 960 g a.e. ha-1, diquat at 1.680 and 3.360g a.i. ha + 5% V/V of Extravon and 2.4-D at 670 and 1

  19. Adsorption of Pb(II) on mesoporous activated carbons fabricated from water hyacinth using H{sub 3}PO{sub 4} activation: Adsorption capacity, kinetic and isotherm studies

    Energy Technology Data Exchange (ETDEWEB)

    Huang, Yang, E-mail: zzsfxyhy@163.com [Department of Chemistry and Environmental Science, Minnan Normal University, Zhangzhou 363000 (China); Fujian Province University Key Laboratory of Modern Analytical Science and Separation Technology, Minnan Normal University, Zhangzhou 363000 (China); Li, Shunxing; Chen, Jianhua; Zhang, Xueliang; Chen, Yiping [Department of Chemistry and Environmental Science, Minnan Normal University, Zhangzhou 363000 (China); Fujian Province University Key Laboratory of Modern Analytical Science and Separation Technology, Minnan Normal University, Zhangzhou 363000 (China)

    2014-02-28

    Activated carbons with high mesoporosity and abundant oxygen-containing functional groups were prepared from water hyacinth using H{sub 3}PO{sub 4} activation (WHAC) to eliminate Pb(II) in water. Characterizations of the WHAC were performed using Brunauer–Emmett–Teller (BET), scanning electron microscopy (SEM) and Fourier transform infrared spectroscopy (FTIR). The BET analysis showed that WHAC possesses a high mesoporosity (93.9%) with a BET surface area of 423.6 m{sup 2}/g. The presence of oxygen-containing functional groups including hydroxyl, carbonyl, carboxyl and phosphate groups renders the WHAC a favorable adsorbent for Pb(II) with the maximum monolayer capacity (q{sub m}) 118.8 mg/g. The adsorption behavior follows pseudo-first order kinetic and Langmuir isotherm. The desorption study demonstrated that the WHAC could be readily regenerated using 0.1 M HCl (pH = 1.0). The desorbed WHAC could be reused at least six times without significant adsorption capacity reduction. The adsorption process was spontaneous and endothermic with ΔG (−0.27, −1.13, −3.02, −3.62, −5.54, and −9.31 kJ/mol) and ΔH (38.72 kJ/mol). Under the optimized conditions, a small amount of the adsorbent (1.0 g/L) could remove as much as 90.1% of Pb(II) (50 mg/L) in 20 min at pH 6.0 and temperature of 298 K. Therefore, the WHAC has a great potential to be an economical and efficient adsorbent in the treatment of lead-contaminated water.

  20. Generación de electricidad en horas de punta a partir de la digestión anaeróbica de camalote Generating electricity during peak hours in Asuncion, Paraguay, through anaerobic digestion of cultivated water hyacinths

    Directory of Open Access Journals (Sweden)

    Pulfer J.

    2011-10-01

    sustainable proposal for generating electricity in the metropolitan area of Asuncion, the capital of Paraguay, based on a renewable source of energy. Electricity would mainly be generated during peak hours with the aim of reducing power contracted by the Paraguayan Electricity Administration (ANDE from existing hydroelectric power plants and thus reduce costs and stabilise transmission and distribution grids in the area of Asuncion. Electricity would be generated at a 130 MW combined cycle thermal power plant using biogas as fuel, this being obtained by anaerobic digestion of water hyacinths cultivated in pools, which would be built on the banks of the Paraguay river opposite Asuncion’s botanical garden. The main advantage of using water hyacinths is their high growth rate, this being 100 to 500 g/day/m2 depending on environmental conditions, thereby allowing plant mass to double every 6 to 15 days. Additionally, carbon to nitrogen ratio in water hyacinth vegetal mass is optimum for biogas generation. About 6.4 kWh/m3 biogas calorific value is high enough to be used for producing heat and, therefore, for generating electricity in a thermal power plant. Such power plant could be directly connected to the national grid through the Puerto Botanic transformer station by building a 2 km long 220 kV transmission line crossing the Paraguay River. This project could save ANDE up to 25 million US$ every year due to reduced contracted power at the Itaipu power plant. Although this reduction will decline by 3% each year due to increased electricity demand, the investment of around 98 million US$ could be repaid within 15 years and would have 5% IRR and US$ 40.5 million NPV.

  1. Biomass production of the aquatic macrophytes Eichhornia crassipes (water hyacinth and Egeria densa (egeria in organic fish farm effluent treatment system / Produção de biomassa das macrófitas aquáticas Eichhornia crassipes (aguapé e Egeria densa (egeria em sistema de tratamento de efluente de piscicultura orgânica

    Directory of Open Access Journals (Sweden)

    Anderson Coldebella

    2008-08-01

    Full Text Available The objective of this research was to evaluate the production of biomass of the aquatic macrophytes water hyacinth (Eichhornia crassipes and egeria (Egeria densa in three hydraulic detention times in a organic pisciculture effluent treatment system. The system was composed for 18 experimental tanks of 2.00 x 1.00 x 0.65m length, width and depth respectively, coated with polypropylene canvas. An entirely randomized 2 macrophytes x 3 hydraulic detention times (HDT and 3 repetitions. The HDT used was 4, 8, and 12 hours. The biomass production was evaluated at the end of the experiment which was extended at 08/07 to 19/08/2006. The water hyacinth showed the best results of biomass production (P0.05. For egeria the treatment that presented the best production of biomass was reached which TDH of 12 hours, being of 0.10 kg.m-2, followed for the HDT of 8 and 4 hours, not differing between the HDT (P>0.05. One concludes that the water hyacinth produced higher biomass than egeria in all of the HDT evaluated.O presente trabalho teve por o objetivo avaliar a produção de biomassa das macrófitas aquáticas aguapé (Eichhornia crassipes e egeria (Egeria densa em um sistema de tratamento de efluente de piscicultura orgânica, sob 3 condições de tempo de detenção hidráulica. O sistema foi composto por 18 tanques experimentais de 2,00 x 1,00 x 0,65 m de comprimento, largura e profundidade, respectivamente, revestidos com lona de polipropileno. O delineamento foi inteiramente casualizado, com 2 macrófitas, 3 tempos de detenção hidráulica (TDH e 3 repetições. Os TDH utilizados foram de 4, 8 e 12 horas. O sistema foi operado de 08/07 a 19/08/2006. A produção de biomassa foi avaliada ao final do experimento. O aguapé apresentou os melhores resultados de produção de biomassa (P0,05. Para a egeria o tratamento que apresentou a melhor produção de biomassa foi no TDH de 12 horas, sendo de 0,10 kg.m- 2, seguido pelos TDH de 8 e 4 horas, não diferindo

  2. Caracterización de Agua Residual de Curtiduría y Estudio del Lirio Acuático en la Recuperación de Cromo Characterization of Tannery Effluents and Study of the Water Hyacinth in Chromium Recovery

    Directory of Open Access Journals (Sweden)

    S.G. Alvarez

    2004-01-01

    Full Text Available Se estudiaron 4 tipos de efluentes muestreados en una tenería con planta de tratamiento. Estos efluentes se caracterizaron durante 4 semanas usando varios parámetros físico-químicos. El efluente de curtido fue evaluado en ensayos de fitoremediación con lirio acuático (Eichornea crassipes, determinándose la eficiencia de remoción del cromo bajo dos esquemas de inyección del agua de curtido a 4 L/día y 8 L/día. La composición de los efluentes residuales es variable y depende de las cargas de cuero procesado por semana. Los componentes del efluente de curtido en los ensayos de fitoremediación afectan significativamente la vida del lirio. Se concluye que la alta concentración de estos parámetros hace imposible la utilización de fitorremediación en este tipo de efluente, siendo necesario un tratamiento primario para disminuir la carga de compuestos presentesFour types of effluent were sampled from a tannery having a treatment plant. These effluents were observed for four weeks, measuring different physicochemical parameters. The tannery effluents were evaluated in phytoremediation assays using water hyacinth (Eichomea crassipes, determining the efficiency of chromium removal under tannery water injection conditions of 4 L/day and 8 L/day. The composition of the effluents was variable and depended on the leather processing loads during each week. The tannery effluent compositions in the phytoremediation assays significantly affected the life of the water hyacinth. It is concluded that the high concentrations of the parameters measured made phytoremediation impossible for this type of effluent, making primary treatment necessary in order to decrease the load of compounds present

  3. Allelopathic effects of water hyacinth [Eichhornia crassipes].

    Directory of Open Access Journals (Sweden)

    Sanaa M M Shanab

    Full Text Available Eichhornia crassipes (Mart Solms is an invasive weed known to out-compete native plants and negatively affect microbes including phytoplankton. The spread and population density of E. crassipes will be favored by global warming. The aim here was to identify compounds that underlie the effects on microbes. The entire plant of E. crassipes was collected from El Zomor canal, River Nile (Egypt, washed clean, then air dried. Plant tissue was extracted three times with methanol and fractionated by thin layer chromatography (TLC. The crude methanolic extract and five fractions from TLC (A-E were tested for antimicrobial (bacteria and fungal and anti-algal activities (green microalgae and cyanobacteria using paper disc diffusion bioassay. The crude extract as well as all five TLC fractions exhibited antibacterial activities against both the gram positive bacteria; Bacillus subtilis and Streptococcus faecalis; and the gram negative bacteria; Escherichia coli and Staphylococcus aureus. Growth of Aspergillus flavus and Aspergillus niger were not inhibited by either E. crassipes crude extract nor its five fractions. In contrast, Candida albicans (yeast was inhibited by all. Some antialgal activity of the crude extract and its fractions was manifest against the green microalgae; Chlorella vulgaris and Dictyochloropsis splendida as well as the cyanobacteria; Spirulina platensis and Nostoc piscinale. High antialgal activity was only recorded against Chlorella vulgaris. Identifications of the active antimicrobial and antialgal compounds of the crude extract as well as the five TLC fractions were carried out using gas chromatography combined with mass spectroscopy. The analyses showed the presence of an alkaloid (fraction A and four phthalate derivatives (Fractions B-E that exhibited the antimicrobial and antialgal activities.

  4. Uso de biomassa seca de aguapé (Eichornia crassipes visando à remoção de metais pesados de soluções contaminadas = Use of water hyacinth (Eichornia crassipes dry biomass for removing heavy metals from contaminated solutions

    Directory of Open Access Journals (Sweden)

    Affonso Celso Gonçalves Junior

    2009-01-01

    Full Text Available O presente trabalho avaliou a eficiência da biomassa seca de aguapé (Eichornia crassipes na remoção dos metais pesados cádmio (Cd, chumbo (Pb, cromo (Cr, cobre (Cu, zinco (Zn e níquel (Ni de soluções preparadas com estes metais. O delineamento utilizado foi inteiramente casualizado, com cinco tratamentos (soluções com diferentes concentrações dos metais pesados e quatro repetições. A biomassa seca permaneceu nas soluções dos tratamentos por um período de 48h, e nos intervalos de 1; 2; 3; 6; 12; 24; 36 e 48h após a instalação do experimento, coletaram-se alíquotas de cada tratamento,determinando-se a maior remoção de cada metal pesado pela biomassa seca do aguapé. Foi realizada digestão nitroperclórica na biomassa seca e determinação dos teores dos metais na biomassa e nas alíquotas por espectrometria de absorção atômica, modalidade chama. Paraos metais Cd, Pb, Cr, Cu e Zn ocorreu remoção significativa pela massa seca do aguapé nos diferentes tratamentos, enquanto para o Ni não foi encontrada diferença significativa. Dessa forma, conclui-se que a biomassa seca produzida, a partir do aguapé Eichornia crassipes, é um excelente material para a remoção, tanto em pequena como em grande escala, de corpos hídricos contaminados com metais pesados.The present work evaluated the efficiency of the dry biomass of water hyacinth (Eichornia crassipes in the removal of heavy metalscadmium (Cd, lead (Pb, chromium (Cr, cupper (Cu, zinc (Zn and nickel (Ni from solutions prepared with these metals. The delineation used was entirely randomized, with five treatments (solutions with different concentrations of heavy metals and fourrepetitions. The dry biomass remained in the treatment solutions for a period of 48h. In the intervals of 1; 2; 3; 6; 12; 24; 36 and 48h after experiment installation, samples were collected of each treatment, determining the greater removal for each heavy metal by water hyacinth dry biomass. Nitro

  5. 水葫芦(Eichhornia crassipes)基质中铜残留对蔬菜生长和食用安全的影响%Residue of Cu in Medium of Composted Water Hyacinth ( Eichhornia crassipes) on Growth of Vegetable in Soil-less Culture and Food Safety

    Institute of Scientific and Technical Information of China (English)

    卢信; 罗佳; 严少华; 范如芹; 刘丽珠; 张振华

    2016-01-01

    To harvest and compost water hyacinth and then use it as a component of the medium in soilless culture is a no-vel train of thought to turn waste into resource. However, as the wastewater from aquacultural farms generally contains heavy metal pollutants, like Cu, and so does the plant growing in the wastewater, it is necessity to assess impacts of the culture media contain in composted water hyacinth on growth and food safety of the vegetable in soilless culture. Results show that in media with Cu varying in the range of 0-600 mg·kg-1 growth of radish and water spinach were not signifi-cantly affected, and Cu concentrations in the edible parts of the two vegetables were within the safety limits ( 10. 0 mg· kg-1 ) set in the National Standard for Food Safety of China, but a relatively higher Cu concentration, about 15 mg·kg-1 , in roots of the water spinach was detected. The concentration of Cu was significantly lower in the edible parts of radish ( 0. 2-1. 6 mg·kg-1 ) than in those of water spinach ( 0. 5-4 mg·kg-1 ) . The content of Cu in the plants was found to be significantly related to the content of exchangeable Cu in the growing media. So it is much safer to plant radish than water spinach in soilless culture using composted water hyacinth in the medium. It is, therefore, essential to consider not only content and availability of Cu in the soilless culture medium, but also species of the vegetable to plant and characteristics of their biological Cu absorption in assessing potential risk of heavy metal pollution of the culture medium to food safety.%将修复养殖水体中收获的水葫芦堆置发酵后作为基质材料是资源化利用的新思路,但由于养殖废水中普遍存在重金属如Cu的污染问题,因此资源化利用的关键是重金属对蔬菜生长的影响和食用安全问题.研究结果表明:基质中w(Cu)在0~600 mg·kg-1范围内对萝卜和空心菜的生长没有显著影响,而且其可食部分未超出GB 15199

  6. Seleção do algodoeiro para resistência à fusariose em área onde ocorre doença semelhante em plantas de labelabe (Dolichos lablab L. Selection of cotton plants resistant to fusarium wilt in a plot where similar disease occurs on hyacinth bean (Dolichos lablab L.

    Directory of Open Access Journals (Sweden)

    Imre L. Gridi-Papp

    1970-01-01

    Full Text Available Em área de Latossolo Roxo, localizada na Estação Experimental "Theodureto de Camargo", em Campinas, verificou-se incidência de doença provocando "murcha", com sintomas internos caracterizados pelo escurecimento dos vasos, sucessivamente em plantas de labelabe e em algodoeiro. Em ambas as espécies vegetais determinou-se a presença de fungos do gênero Fusarium, mediante isolamento feito em plantas doentes. Seleções, feitas na referida área, de plantas pertencentes a linhagem de algodoeiro suscetível à murcha de Fusariumderam origem a linhagens que revelaram apreciável resistência quando testadas em solo infestado por Fusarium oxysporum f.vasinfectum (Atk. Snyder & Hansen. São discutidos aspectos relacionados com a possível descoberta de nova fonte genética de resistência à doença e com a existência desse fungo sob infestação natural na Estação Experimental mencionada. Também é apontada a possibilidade de serem o algodoeiro e a leguminosa em questão hospedeiras do mesmo agente patogênico.The occurrence of wilt disease, successively in plants of hyacinth bean (Dolichos lablab L. and cotton, was observed in a plot of latosolic B (Terra Roxa soil at the "Theodureto de Camargo" Experiment Station at Campinas, where no Fusarium wilt has been recorded before. Both species presented internal symptoms consisting in darkened vessels. Fungi of the genus Fusarium were isolated from these plants. Plant selection for wilt resistance was made in the above mentioned area where a Fusarium - susceptible variety (IAG 51/1104 of cotton had been planted. The progenies when tested in soils infested by Fusarium oxysporum f. vasinfectum Atk. Snyder & Hansen revealed fair resistance to wilt. IAG 51/1104 comes from a cross between the varieties Delfos and Delta Pineland-10, both wilt susceptible under field conditions of the State of São Paulo. It is likely that the wilt resistance of some of its progeny might have originated by recombination

  7. Ingeniørenes rolle ved skabelse af innovative koncepter

    DEFF Research Database (Denmark)

    McAloone, Tim C.

    2007-01-01

    mikromøller (til installering på taget derhjemme i Storbritannien) lægger alle sammen pres på den danske vindmøllebranche. Der er også en teknologipark i Spanien, hvor virksomheder som Microsoft, Hewlett Packard og General Motors forsynes med 100 procent vedvarende energi fra lokalområdet. Teknologiparken har...

  8. Reklaami turunduslike aspektide evolutsioon / Jaanika Allikmaa, Rene Arvola

    Index Scriptorium Estoniae

    Allikmaa, Jaanika

    2002-01-01

    Kasut. kirj. lk. 19-20. - Kokkuvõte ingl. k. lk. 20. Selleks, et tänapäeval edukalt reklaami teha, tuleb keskenduda reklaami atraktiivsuse asemel selle sobivusele turundaja, brändi, tarbija ja turu eripäraga. Tabelid

  9. Friedrich Nietzsche in Rene Girard’s Thought

    Directory of Open Access Journals (Sweden)

    Pablo Ruiz Lozano

    2014-12-01

    Full Text Available René Girard is an anthropologist, who has proposed an original hypothesis about the scapegoat mechanism and the relation between violence and religion. Starting from it he intends to work out a criticism of modernity, seeking out to recuperate the role of Christianity in the culture. From this perspective, he approaches the work of F. Nietzsche showing the two faces he finds out in the thinker: his intuition about the hidden truth of violence; and his rejection of this truth, to return to the violent origins of culture.

  10. Näitused Rene Kuulmanni ja Mart Lepa kunstikogust

    Index Scriptorium Estoniae

    2002-01-01

    Tartu Ülikooli kunstimuuseumis näitus "Ülo Sooster ja eesti sürrealism", kus on eksponeeritud ka J. Saali, E. Kitse, H. Roode, O. Marani, P. Mudisti, T. Pääsukese, Kreg A-Kristringi jt. loomingut. Galeriis Domini Canes Karl Pärsimäe 100. sünniaastapäeva tähistav näitus "Pärsimägi ja Burman"

  11. Ptentsõ shkolõ "Pallas" / Rene Bibikov

    Index Scriptorium Estoniae

    Bibikov, Rene

    2008-01-01

    Näitus ѕPallaslaste maalikunst Rahvusraamatukogus" raamatukogu peanäitusesaalis. Ekspositsioon koosneb Rahvusraamatukogu kunstikogus leiduvatest kunstikoolis ѕPallasؤ õppinud maalikunstnike töödest. Nende seas on Eesti kunstiklassika vanameistrid Andrus Johani, Richard Sagrits, Richard Uutmaa, Silvia Leitu, Elmar Kits, Eerik Haamer jt. Näituse koostas kunstiteadlane Jüri Hain. Kujundas Andres Tolts. 4 ill

  12. Reklaami turunduslike aspektide evolutsioon / Jaanika Allikmaa, Rene Arvola

    Index Scriptorium Estoniae

    Allikmaa, Jaanika

    2002-01-01

    Kasut. kirj. lk. 19-20. - Kokkuvõte ingl. k. lk. 20. Selleks, et tänapäeval edukalt reklaami teha, tuleb keskenduda reklaami atraktiivsuse asemel selle sobivusele turundaja, brändi, tarbija ja turu eripäraga. Tabelid

  13. On the first integral conjecture of Rene Thom

    OpenAIRE

    Cresson, Jacky; Daniilidis, Aris; Shiota, Masahiro

    2007-01-01

    More that half a century ago R. Thom asserted in an unpublished manuscript that, generically, vector fields on compact connected smooth manifolds without boundary can admit only trivial continuous first integrals. Though somehow unprecise for what concerns the interpretation of the word \\textquotedblleft generically\\textquotedblright, this statement is ostensibly true and is nowadays commonly accepted. On the other hand, the (few) known formal proofs of Thom's conjecture are all relying to th...

  14. Tsaari motopärand Eestimaa teedel / Rene Levoll

    Index Scriptorium Estoniae

    Levoll, Rene, 1958-

    2016-01-01

    Viimane Nikolai II visiit Eestisse toimus 1915. aastal. Oktoobrirevolutsiooni järel sattus tsaari autopark bolševike käsutusse. Kaks autot keiserlikust motopärandist jõudsid ka Maarjamaale. Üks nendest oli varem kuulunud Nikolai II vanemale õele Kseniale

  15. Advanced treatment of flue gas condensate; Avancerad rening av roekgaskondensat

    Energy Technology Data Exchange (ETDEWEB)

    Axby, Fredrik [Carl Bro Energikonsult AB, Malmoe (Sweden); Ekengren, Oesten; Bjurhem, Jan Erik [IVL Swedish Environmental Research Inst. (Sweden)

    2004-11-01

    The aim of the project is to study different techniques to recover water to the process and to reduce emission of ammonia to water and air. Membrane technology (ultra- (UF) and nanofiltration (NF) and reverse osmosis (RO)) and a stripper have been studied for ammonia separation. The use of bio-fuel in energy production is increasing. The off-gases are often condensed to increase energy yield and to decrease emissions to air. Since the concentration of nitrogen (ammonium) is high in condensates from units with SNCR for NO{sub x}-reduction (selective non-catalytic reduction) this water has to be treated further. Another aim of the project is to replace a great part of the tap water used in the process. This can be accomplished with membrane technology. Laboratory tests revealed a certain degree of membrane fouling. However, both NF and RO worked well in the full-scale unit, in spite of problems in the condensate treatment that resulted in tar products in the water. There was no obvious negative effect on these membranes. Analyses of PAH have shown a low base concentration that may lead to fouling after a long time. UF removes most of these PAH and thus protects the following NF- or RO-membranes. NF gave about 3 times higher filtration capacity (flux) than RO for the condensate at 30 bars. This can save a lot of money, since the membrane area can be reduced to a third. High temperature also increases the flux. The results are of high interest but ought to be certified during long run tests. Fouling was low in both NF and RO, and initial flux was retained after cleaning. The reason is probably the good pre-treatment (UF). The concentration could proceed very far, which make it possibly to reuse the concentrate to the system. Simulations of an ammonia stripper showed some parameters to be critical in certain ranges, while others didn't affect the result. Airflow is a critical parameter during stable conditions within the design data. Simulated data were verified with real data, and this showed that the model was acceptable. The stripper is always more effective at higher temperature. Introduction of systems like this are often very positive, since economy and environment are both improved. The design of this kind of system is very case specific. The pay-off time was calculated to quite reasonable less than 4 years for a case described in the report. In some cases water recovery is not important. Just an ammonia stripper is then needed, which means a relatively low cost compared to the possible benefit in NO{sub x}-reduction.

  16. Kultuuri mõju eestlaste ja leedulaste ruumikasutusele / Rene Altrov

    Index Scriptorium Estoniae

    Altrov, Rene

    2007-01-01

    Vaadeldakse kultuuri mõju ruumikasutusele erinevates suhtlusolukordades, püütakse välja selgitada, millised on eestlaste ja leedulaste distantsikasutamise reeglid, kas nad erinevad olenevalt rahvusest ja situatsioonist ning kas nad on ka ajas muutunud

  17. Konkurentsi kahjustav teabevahetus: reeglid ja Eesti praktika / Rene Frolov

    Index Scriptorium Estoniae

    Frolov, Rene, 1981-

    2014-01-01

    Konkurentsiseaduse § 4 lõike 1 punkt 4 ütleb, et konkurentsi kahjustava teabe vahetamine ettevõtjate vahel on keelatud. Teabevahetus Eesti õiguses ja Riigikohtu praktikas. Keelatud teabevahetusest Euroopa Liidu õiguses

  18. Ingeniørenes rolle ved skabelse af innovative koncepter

    DEFF Research Database (Denmark)

    McAloone, Tim C.

    2007-01-01

    første bølge af miljøhensyn kom med energikrisen i 1970'erne og ebbede ud, da oliepriserne faldt igen. Miljøbølge nummer to udvidede vore horisonter til begrebet bæredygtighed, hvor den treenige overvejelse ”people-profit-planet” forplantede sig i strategiovervejelserne og årsrapporter verden over. Men...

  19. Development of Hot Isostatically Pressed Rene 95 Turbine Parts

    Science.gov (United States)

    1977-05-01

    Iteration Shape - Vendor B .. .. .. ..... 134 51 Task lB Second Iteration Shape Disk After Pickling Off thle Steel Container - Vendor B...iteration shape would be necessary in the third iteration. A typical second- iteration disk is shown in Figure 51 after the steel- container was pickled ...0.09 Columbium ........... 3.30 - 3.70 Manganese ............ 0.15 Max. Zirconium ............. 003-- 0-07 Silicon ............... 0.20 Max. Titanium

  20. Kultuuri mõju eestlaste ja leedulaste ruumikasutusele / Rene Altrov

    Index Scriptorium Estoniae

    Altrov, Rene

    2007-01-01

    Vaadeldakse kultuuri mõju ruumikasutusele erinevates suhtlusolukordades, püütakse välja selgitada, millised on eestlaste ja leedulaste distantsikasutamise reeglid, kas nad erinevad olenevalt rahvusest ja situatsioonist ning kas nad on ka ajas muutunud

  1. Kõige odavam energiaallikas on ikkagi kokkuhoid / Rene Tammist

    Index Scriptorium Estoniae

    Tammist, Rene, 1978-

    2008-01-01

    Ilmunud ka: Vali Uudised 2. apr. lk. 2, Lõunaleht 3. apr. lk. 4, Türi Rahvaleht 4. apr., lk. 2, Pärnu Postimees 4. apr., lk. 21, Harju Ekspress 4. apr., lk. 6, Kuulutaja 4. apr. lk. 4, Virumaa Teataja 10. apr. lk. 15, Lääne Elu 12. apr. lk. 5. Euroopa Parlamendi sotsiaaldemokraatide fraktsiooni nõuniku sõnul võib Eestis säästa kuni kolmandiku praegu tarbitavast energiast, kõige tulemuslikum oleks alustada hoonetes tarbitava energiakoguse vähendamisega. EL-is liigutakse jõudsalt selles suunas, et uued hooned järgiksid passiivmajade nõudeid. Passiivmaja mõistest ja nõuetest

  2. Näitused Rene Kuulmanni ja Mart Lepa kunstikogust

    Index Scriptorium Estoniae

    2002-01-01

    Tartu Ülikooli kunstimuuseumis näitus "Ülo Sooster ja eesti sürrealism", kus on eksponeeritud ka J. Saali, E. Kitse, H. Roode, O. Marani, P. Mudisti, T. Pääsukese, Kreg A-Kristringi jt. loomingut. Galeriis Domini Canes Karl Pärsimäe 100. sünniaastapäeva tähistav näitus "Pärsimägi ja Burman"

  3. Kõige odavam energiaallikas on ikkagi kokkuhoid / Rene Tammist

    Index Scriptorium Estoniae

    Tammist, Rene, 1978-

    2008-01-01

    Ilmunud ka: Vali Uudised 2. apr. lk. 2, Lõunaleht 3. apr. lk. 4, Türi Rahvaleht 4. apr., lk. 2, Pärnu Postimees 4. apr., lk. 21, Harju Ekspress 4. apr., lk. 6, Kuulutaja 4. apr. lk. 4, Virumaa Teataja 10. apr. lk. 15, Lääne Elu 12. apr. lk. 5. Euroopa Parlamendi sotsiaaldemokraatide fraktsiooni nõuniku sõnul võib Eestis säästa kuni kolmandiku praegu tarbitavast energiast, kõige tulemuslikum oleks alustada hoonetes tarbitava energiakoguse vähendamisega. EL-is liigutakse jõudsalt selles suunas, et uued hooned järgiksid passiivmajade nõudeid. Passiivmaja mõistest ja nõuetest

  4. Rene Tammist: Eesti Energiat ei maksa praegu börsile viia / Rene Tammist ; intervjueerinud Mikk Salu

    Index Scriptorium Estoniae

    Tammist, Rene, 1978-

    2010-01-01

    Autori väitel on pool Eesti Energia investeerimiskavast problemaatiline, poliitiliselt otsustamata, riskid maandamata. Ta soovitab börsile minekuga 2-3 aastat oodata, siis selgub, kas uuest põlevkivitehnoloogiast saab asja ja kas neid investeeringuid on vaja. Eesti Energiale lisakapitali hankimise võimalustest

  5. Rene Tammist: Eesti Energiat ei maksa praegu börsile viia / Rene Tammist ; intervjueerinud Mikk Salu

    Index Scriptorium Estoniae

    Tammist, Rene, 1978-

    2010-01-01

    Autori väitel on pool Eesti Energia investeerimiskavast problemaatiline, poliitiliselt otsustamata, riskid maandamata. Ta soovitab börsile minekuga 2-3 aastat oodata, siis selgub, kas uuest põlevkivitehnoloogiast saab asja ja kas neid investeeringuid on vaja. Eesti Energiale lisakapitali hankimise võimalustest

  6. Avaliações fisiológicas e bioquímicas de plantas de aguapé (Eichhornia crassipes cultivadas com níveis excessivos de nutrientes Physiological and biochemical evaluations of water hyacinth (Eichhornia crassipes, cultivated with excessive nutrient levels

    Directory of Open Access Journals (Sweden)

    E. Alves

    2003-01-01

    Full Text Available Plantas de aguapé foram cultivadas em solução nutritiva de Hoagland & Arnon n.2, cujo aumento dos níveis de N, P e Cu estabeleceu as diferenças entre os tratamentos. Utilizou-se o delineamento experimental inteiramente casualizado, com quatro repetições. As variáveis fisiológicas avaliadas foram área foliar, peso de matéria seca e taxa de crescimento absoluto, taxa de crescimento relativo, taxa assimilatória líquida, razão de área foliar, peso específico de folha, área foliar específica. Foram determinados também os teores de açúcares totais e redutores e de aminoácidos totais e a atividade das enzimas glutationa S-transferase e superóxido dismutase. Os extratos enzimáticos foram obtidos da matéria fresca da parte aérea das plantas. Após a coleta, foram determinados os pesos de material seco de raízes, pecíolos e folhas, que foram utilizados para a determinação de açúcares solúveis totais e redutores e de aminoácidos. O excesso de nitrogênio causou aumento de açúcares nas folhas e de aminoácidos nas raízes. Já o tratamento com excesso de fósforo levou ao aumento de açúcares nas raízes. Os resultados apresentados sugerem que, entre os nutrientes em excesso avaliados, o cobre (0,12 mg L-1 foi o maior indutor da atividade da GST e SOD, sugerindo que este elemento induziu estresse nas plantas de aguapé.Water hyacinth plants were cultivated in a Hoagland & Arnon n.2 nutrient solution with increased N, P and Cu levels establishing the differences among the treatments. The experimental design was completely randomized, with four replicates. Physiological evaluations included leaf area, dry matter and growth analysis parameters (absolute growth rate, relative growth rate, net assimilatory rate, leaf area ratio, specific leaf weight, specific leaf area. Biochemistry evaluations were total and reducing sugars, total amino acids and activity of the antioxidant enzymes (glutathione S-transferase and superoxide

  7. Efeito de pontas de pulverização e de arranjos populacionais de plantas de Eichhornia crassipes e Salvinia auriculata na deposição de calda de pulverização sobre plantas de Pistia stratiotes Effect of spray tips and water hyacinth and water lettuce plant population arrangements of watermoss plant spray mix deposition

    Directory of Open Access Journals (Sweden)

    S.R. Marchi

    2009-06-01

    de pulverização, independentemente do tipo de ponta de pulverização. A ponta TXVK-8 proporcionou depósitos unitários e totais de calda de pulverização superiores aos da ponta DG 11002VS.This study aimed to evaluate two types of nozzles (ConeJet TXVK-8 and TeeJet DG 11002 VS and the amount of spray mix deposited on water lettuce (Pistia stratiotes plants organized under different population arrangements with water hyacinth (Eichhornia crassipes and eared watermoss (Salvinia auriculata plants. In addition to a full-dominance proportion over the area, corresponding to 100% cover of the water tank by eared watermoss plants, arrangements were used with either water hyacinth or water lettuce at 75%:25%, 50%:50%, and 25%:75%. Triple density was also used, with the three species being equally displayed at a 33.33% proportion. Dye solutions of FD&C Yellow no. 5 at 3,500 ppm and FD&C Blue no. 1 at 1,000 ppm were used as spraying tracers for TXVK-8 and DG 11002 VS nozzles, respectively. Both solutions were sprayed at the same plot within 30 minute interval each through a CO2 pressured backpack knapsack calibrated to deliver a spray volume around 200 L ha-1 . Plants at reservoirs were flushed with distilled water until total removal of the dyes deposited on them. The total spray deposits were estimated in μL per plant and the unitary deposits where estimated in μL cm-2 of foliar surface. Increase in water hyacinth plant proportion in the arrangement resulted in lower spray deposition over water lettuce. Increase in water moss plant proportion in the arrangement provided higher spray depositions over water lettuce, independently of the nozzle type used. The TXVK-8 nozzles provided higher unitary and total spray depositions compared to the DG 11002 VS nozzle.

  8. 水葫芦生态净化工程对竺山湖底栖动物群落结构变化的影响%Effects of Ecological Purification Engineering of Planting Water Hyacinth on Macro-Benthos Community Structure

    Institute of Scientific and Technical Information of China (English)

    刘国锋; 韩士群; 何俊; 严少华; 周庆

    2014-01-01

    , which has the wide adaptability, large biomass, strong purification ability, especially the eutrophication water, after solving the mechanized harvesting, recycling use of terminal processing. The conventional ecological engineering practice is mainly in small water body or inland rivers, which has the obvious purification effects for no wind disturbance. But controlled planting the aquatic plants in large water body to purify the polluted water is still rare now. According to the instruction and requirements of Jiangsu Province, the ecological effects of planting 67 hectares water hyacinth (E. crassipens) in Zhushan Bay, Lake Taihu, which is one of the polluted lake water purification measures in Jiangsu Province and mainly planted by Jiangsu Academic Agricultural Science, on macro-benthos population and structure and benthos environment, were studied during 4~11 month in 2011 with consecutive surveys. Results indicated that average density mollusca (the main species were Bellamya aeruginosa) in far-planting, near-planting and planting area was 15.13、15.63、22.63 ind·m-2,respectively, and biomass was 17.00、17.60、25.50 g·m-2,respectively, showed that benthos biomass in planting area was higher than that the others. However, the average density and biomass of Oligochaeta (the main species were Limodrilus hoffmeisteri) and Chironomidae in planting area were lower than that outside of planting area, and it demonstrated that the benthic environment gradually improved after controlled planting the floating plants. It indicated that the ecological engineering management through planting water hyacinth couldn’t show the obvious purification effects of polluted water in a short time, especially in a shallow, wind disturbance of large lake, and it need long-term, lasting approached to reach the purifying goals. The index of Shannon-Weaver and Simpson indicated that water environment was severe polluted state. On the basis of the survey results, the large-area and high

  9. 几个主要因子对水葫芦链格孢生长和侵染力的影响%Effects of Some Major Factors on Growth and Pathogenicity of Alternaia tenuissima Causing Black Spot of Water Hyacinth

    Institute of Scientific and Technical Information of China (English)

    胡丽; 谭万忠; 殷利利; 刘佳; 罗华东

    2011-01-01

    测试引起水葫芦黑斑病的生防真菌水葫芦链格孢(Alternaria tenuissima)的主要生物学特性(培养基、温度、pH值对菌落生长以及光照对产孢量的影响)和影响该菌株侵染力的3个主要因子(接种温度、光照、保湿时间),以期为该菌的大量发酵和真菌除草剂的研制奠定基础.试验结果表明,培养基、温度和酸碱度是影响该菌生长的主要因素,其最佳培养基、温度和酸碱度分别是马铃薯蔗糖培养基、25℃和pH值9.0.最适合该菌产孢的光照条件是近紫外光(12h光/12h暗),培养20d后产孢量达到3.44×105个/皿.在室内控制条件下测定,温度、湿度和光照对菌株的致病力都有很大的影响.30℃处理的原生叶片的病害严重度明显高于20℃和25℃2个处理,21d时达到7.77;保湿处理时间设定为0~48h,保湿12h时,4周后水葫芦叶片平均病害严重度达到5.21,感病率达到95%,且发病速度较快;弱光照处理(1 2001x)的叶片病害严重度较强光照处理(3000 lx)的严重度级数高,因此,在一定程度上强光照对菌丝的侵染有抑制作用.%The effects of several major factors on growth(medium, temperature and pH) ,sporula-tion(illumination)and pathogenicity(inoculation temperature,illumination and moisture time) of Alternaria tenuissima , a biological control agent for water hyacinth, were investigated in the present study. Experimental results indicated that the best medium,temperature and pH were,respectively, PSA,25℃- and pH 9. 0 for the fungus growth. UV light (12h/d) was the most appropriate for its sporulatioh,and the spore production reached 3. 44 X 105 per dish after 20 days. Temperature, light intensity and moisture were shown marked impacts on conidial germination and infection of the fungus. The highest disease intensity on the primary leaves at 21 days after inoculation and incubation at 30℃ reached 7. 77,obviously higher than at 20℃ and 25℃. Moisture duration was

  10. Deposição de calda de pulverização sobre plantas de salvínia em função de pontas de pulverização e arranjos populacionais entre plantas de Aguapé e Alface-D'Água Spray deposition on water fern plants in function of nozzle tips and population arrangements with water Hyacinth and Water Lettuce plants

    Directory of Open Access Journals (Sweden)

    S.R. Marchi

    2011-03-01

    salvínia.This study aimed to evaluate two types of spray tips (ConeJet TXVK-8 and TeeJet DG 11002 VS and the amount of spray mix deposited on Salvinia auriculata plants organized under different population arrangements with Eichhornia crassipes and Pistia stratiotes plants. In addition to a full-dominance proportion over the area, corresponding to 100% cover of the water tank by eared water moss plants, arrangements with either water hyacinth or water lettuce were made at 75%:25%, 50%:50%, and 25%:75%. A triple density, in which the three species were equally disposed at a 33.33% proportion, was also used. Dye solutions of FD&C Yellow no. 5 at 3,500 ppm and FD&C Blue no.1 at 1,000 ppm were used, as spraying tracers for TXVK-8 and DG 11002 VS nozzles, respectively. Both solutions were sprayed at the same plot within a 30-minute interval each, through a CO2 pressured backpack, calibrated to deliver a spray volume of around 200 L ha-1. The total spray deposits were estimated in mL per plant and the unit deposits in mL cm² of foliar surface. No significant differences were observed between the nozzle tips used at different population arrangements, except total spray mix deposited on plants at 100% of eared water moss dominance proportion, with ConeJet TXVK-8, providing superior spray mix deposition, compared with TeeJet DG 11002 VS. The highest spray mix deposition was obtained under 100% of salvínia dominance. However, the spray mix quantity decreased with increase of water hyacinth in the proportion and reached the lowest value when 25% of eared water moss plants were associated with 75% of water hyacinth plants. The presence of water lettuce did not influence spray mix deposition over eared water moss plants.

  11. Noored aitavad poliitikuid / Rene Biene, Evelin Daniel, Jaanika Reilik ; interv. Betty Ester

    Index Scriptorium Estoniae

    Biene, Rene

    2006-01-01

    Tartu noortevolikogu liikmed selgitavad, kuidas sai alguse noortevolikogu idee, millised on põhilised arutlusteemad noortevolikogu istungitel, kes on nende eeskujud poliitikutena ning pakuvad välja ideid, kuidas lahendada noorte kaubanduskeskustesse kogunemise probleemi

  12. La casa de Rene Trümpler – Stäfa - Suiza

    Directory of Open Access Journals (Sweden)

    Studer, André M.

    1971-09-01

    Full Text Available This house has been designed on a 30 cm modulus, i.e., the length of a human foot, and its internal arrangement seeks to separate all living spaces where distinct functions are performed, i.e., work, relaxation, eating, cooking. The quietest and most remote zone is devoted to the bedrooms. The dwelling faces the Zurich lake and mountains, and was most carefully designed to house its owners: a professor and his family.Diseñada partiendo de la base de que todas las medidas utilizadas estuvieron relacionadas con la del pie humano —30 cm—, aparece zonificada de tal forma que todas las estancias de vida diurna están vinculadas y diferenciadas funcionalmente —trabajo- estar-comedor-cocina—, reservando las zonas más retiradas y tranquilas para las funciones propias de la vida nocturna. Con vistas al lago de Zurich y las montañas, esta Casa fue cuidadosamente proyectada para albergar a sus originales propietarios: la familia de un profesor muy interesada en la vida cultural.

  13. Citomegalovirus: monitoraggio dell’infezione e della terapia nei pazienti trapiantati di rene

    Directory of Open Access Journals (Sweden)

    Nicola Liritano

    2003-12-01

    Full Text Available CMV infection is a major cause of disease following renal transplantation. Clinical diagnosis is difficult because the virus usually produces only few, if any, symptoms. Consequently rapid and sensitive diagnostic methods are needed, since clinically effective antiviral therapy is available. Qualitative-quantitative detection of CMV-DNA in leukocytes and in plasma and pp65-antigenaemia are the methods which allow to evidence viral replication activity. In this study we report the our experience about follow-up of 70 kidney transplant recipients. Results indicate that while active CMV infection occured in 25 patients (37,5%, only 11 patients (15,7% showed antigenaemia and DNAemia values predictive of CMV disease. In this study we also evaluated the efficacy of pre-emptive therapy.

  14. Art history in nineteenth-century Estonia? / Rene Mäe

    Index Scriptorium Estoniae

    Jõekalda, Kristjan, 1971-

    2015-01-01

    Kunstiajaloodistsipliini teke Baltikumis, Tartu Ülikooli kunstiajaloo-alane tegevus. Kunstiajaloo esimesed viljelejad Eesti alal: Gotthard von Hansen, Friedrich Amelung, Reinhold Guleke ja Wilhelm Neumann

  15. An Evaluation of Four Current Models to Predict the Creep-Fatigue Interaction in Rene 95

    Science.gov (United States)

    1979-06-01

    life of AISI 304 stainless steel, whose life was degraded by waveshapes in which more time was spent under a tensile strain hold than under a...Air Force Flight Dynamics Laboratory, Wright-Patterson AFB, OH, 1970), pp. 301 -311. 13. H. L. Bernstein, "An Evaluation of Four Models for the Creep

  16. 77 FR 58150 - Rene Casanova, M.D.; Decision and Order

    Science.gov (United States)

    2012-09-19

    ... pain patients who are at risk for misusing their medications and those whose living arrangements pose a... ``Julia Sanchez'' at Coast to Coast Healthcare Management (CCHM), 328 East Hillsboro Boulevard, Deerfield... substances. (See Tr. 19-20.) DI Graumlich described it as a ``vending machine where people can get their...

  17. Europarlamendi sotside liider soovib EL-ile selgemat juhtimist / Enrique Baron Crespo ; interv. Rene Tammist

    Index Scriptorium Estoniae

    Crespo, Enrique Baron

    2001-01-01

    Europarlamendi (EP) otsuste mõju tavakodaniku elule. Kodaniku võimalus sekkuda EP tegevusse. Erinevused EP ja liikmesriikide parlamentide vahel. Sotsiaaldemokraatide roll Euroopa integratsioonis ja EP-s. EP areng tulevikus. EL-iga liitumise mõju Mõõdukate partei siseelule

  18. Uudised : Kaljuste avas festivali Amsterdamis. Rene Eespere "Ritus" Euroraadios. "Lucretia teotamise" kontsertettekanne / Priit Kuusk

    Index Scriptorium Estoniae

    Kuusk, Priit, 1938-

    1999-01-01

    7. nov. juhatas T.Kaljuste Amsterdamis festivali "New Spirituality in Music" avakontserti, 10. nov. anti talle üle Robert Edleri auhind. Euroopa kooride rahvusvahelisel raadiokonkursil "Let The Peoples Sing 1999" finaalis esitas taani kammerkoor R. Eespere teose "Ritus". 18. nov. toimub Vanemuise kontserdimajas B.Britteni ooperi "Lucretia teotamine" kontsertettekanne, mis on teose esiettekanne Eestis. 26.-28. nov. toimub EMAs 33. Balti muusikateaduse konverents "Muusikateadus Baltimaades"

  19. Thermal treatment of ashes[Fly Ash from Municipal Waste Incineration]; Termisk rening av askor

    Energy Technology Data Exchange (ETDEWEB)

    Wikman, Karin; Berg, Magnus; Bjurstroem, Henrik [AaF-Energi och Miljoe AB, Stockholm (Sweden); Nordin, Anders [Umeaa Univ. (Sweden). Dept. of Applied Physics and Electronics

    2003-04-01

    In this project descriptions of different processes for thermal treatment of ashes have been compiled. A technical and economic evaluation of the processes has been done to identify possibilities and problems. The focus in the project lays on treatment of fly ash from municipal waste incineration but the processes can also be used to treat other ashes. When the ash is heated in the thermal treatment reactor, with or without additives, the material is sintered or vitrified and at the same time volatile substances (Zn, Pb, Cd, Hg etc.) are separated. In general the separation is more effective in processes with reducing conditions compared to oxidizing conditions. Oxidizing processes have both worse separation capacity and require more energy. The oxidizing processes are mainly used to stabilize the ash through vitrification and they are in some cases developed for management of municipal sewage sludge and bottom ash. However, these processes are often not as complex as for example an electric arc melting furnace with reducing conditions. The research today aim to develop more effective electrical melting systems with reducing conditions such as plasma melting furnaces, electric resistance melting furnaces and low frequency induction furnaces. A central question in the evaluation of different thermal treatment processes for ash is how the residues from the treatment can be used. It is not certain that the vitrified material is stable enough to get a high economic value, but it can probably be used as construction material. How the remaining metals in the ash are bound is very important in a long-time perspective. Further studies with leaching tests are necessary to clarify this issue. The heavy metal concentrate from the processes contains impurities, such as chlorine, which makes it unprofitable to obtain the metals. Instead the heavy metal concentrate has to be land filled. However, the amount of material for land filling will be much smaller if only the heavy metal concentrate has to be land filled instead of the total amount of ash. The cost for thermal treatment of ash is today relatively high and this kind of ash treatment has an economic interest only during certain circumstances. The process cost is for example not very important if the residues from the process can be used in commercial glass production. Other situations that can make thermal treatment of ashes attractive are further increased land filling costs or new environmental restrictions. Today the cost for land filling in Sweden is relatively low and therefore it is unprofitable to treat ashes with high temperature processes. However, the development of more effective processes and higher costs and taxes for land filling could result in a better economic situation for thermal treatment processes.

  20. [Odontology and the beginning of cartesianism (1673--1650) (Rene Descartes)].

    Science.gov (United States)

    Gysel, C

    1979-01-01

    In the seventeenth century the universities of the Netherlands underwent the influence of Descartes in all the faculties. In medicine three periods can be distinguished: in the first, pathology and therapy are still galenic; the second, by the application of the cartesian method, triumphs in physiology; and the third, corrected by the views of Newton is integrated in a moderate biomechanism.

  1. Täna ketšupivestern, homme kunstfilm! / Rene Vilbre

    Index Scriptorium Estoniae

    Vilbre, Renė, 1970-

    2002-01-01

    Seoses Theodor Lutsu sünniaastapäevaga Palamusel toimunud seitmendatel filmipäevadel leidis aset ka 5. lühifilmide avatud konkurss. Konkursi võidutöödest : Fraktsioon Õ mängufilmist "Tapja õllejogurti seiklused", Kullar Viimse dokumentaalfilmist "Kuhu lähed", Daniel Müntineni alias Dan Leadi animafilmist "Punapäine päikeseloojang" ning telerežii tudengi Heilika Võsu eksperimentaalfilmist "Hüsteerik"

  2. Purification of methanol for transportation use; Rening av metanol foer anvaendning som fordonsbraensle

    Energy Technology Data Exchange (ETDEWEB)

    Schenck, Anna von; Jansson, Mikael; Ljungquist, Pierre

    2008-11-15

    In this study a techno-economic analysis has been performed on the possibility of separating malodours sulphur compounds from the methanol obtained in the condensate after the evaporation in the kraft pulping process. The application for the clean methanol should be as transportation fuel. Two cases have been simulated in the simulation model Hysys, Case 1 using only distillation and Case 2 were distillation has been complemented with chemicals to further reduce the organic sulphur content. An economical analysis has been performed and it has been showed that the production cost for the cleaned methanol is in the range 2.7-4.2 SEK/l methanol

  3. Leebusprogramm Eestis - illusioon või reaalsus? / Rene Frolov, Tarmo Sild

    Index Scriptorium Estoniae

    Frolov, Rene, 1981-

    2006-01-01

    Kartellivastase võitluse taust Euroopa Liidus ja Eestis, Eesti leebusprogrammi (KrMS § 205) põhiolemus ja rakendamise piirid, juurdepääs sooduskohtlemise toimikule ning juhtorgani liikmete kaitse

  4. Wet treatment of ashes, a survey of methods; Vaat rening av askor, metodoeversikt

    Energy Technology Data Exchange (ETDEWEB)

    Bjurstroem, Henrik [AaF-Energi och Miljoe AB, Stockhom (Sweden); Steenari, Britt-Marie [Chalmers Univ. of Technology, Goeteborg (Sweden)

    2003-10-01

    Ash contains elements and compounds that are questionable from an environmental point of view, such as very soluble salts, alkali yielding a high pH-value, metals, heavy metals and organic compounds. When ash is to be used, one requires that it is stable, i. e. that it does not influence the immediate surroundings and the environment in a negative way. Stability means that water that comes into contact with ash shall not pick up environmentally disruptive compounds to any significant extent. The presence of heavy metals in the ash does not always lead to their being leached to the surroundings, but it does always imply an uncertainty. It is probable that fly ash from incineration of municipal solid waste has to be treated in some way before it is landfilled. Washing the ash or dissolving it partially with a solvent such as water or an acid is a relatively simple method to reduce the risk for contamination of the environment by removing soluble compounds from the ash. Such methods consist of techniques that in other applications are proven and robust, and that may be adapted to the present conditions: the composition and the properties of the ash. In this report, a survey of methods is presented. Wet treatments may be apprehended as a combined separation and concentration process: on the one hand environmentally disruptive compounds are removed from ash, on the other hand these are concentrated in a remainder survival remission rate. These methods are a perfect pretreatment for various stabilization methods, a. o. thermal treatments such as vitrifying or sintering, or for utilization of the ashes e. g. in public works as they remove the obstacles to a good performance, namely the soluble salts. In this report are presented a systematic description of wet treatments aiming at purification and a survey of methods of industrial interest. A certain number of wet treatment methods are in operation outside Sweden, principally for fly ash from municipal solid waste incinerators. Several activities presently under way have not yet resulted in a full-scale plant. At present, it does not seem interesting to treat bioashes that are to be spread on forest soils using a wet method. Today, there is not any proven method to keep potassium in the ash or to return it to the ash. Electrodialysis could be such a technique, but at present it is still in the research stage. Extraction of metals or other components from ash does not seem to be economically profitable on its own merits today. The overall impression is that wet methods are a feasible way to treat ashes, but that they need to be studied in each case for the fly ashes or air pollution control residues that are produced in Swedish plants.

  5. Art history in nineteenth-century Estonia? / Rene Mäe

    Index Scriptorium Estoniae

    Jõekalda, Kristjan, 1971-

    2015-01-01

    Kunstiajaloodistsipliini teke Baltikumis, Tartu Ülikooli kunstiajaloo-alane tegevus. Kunstiajaloo esimesed viljelejad Eesti alal: Gotthard von Hansen, Friedrich Amelung, Reinhold Guleke ja Wilhelm Neumann

  6. Culture, economy and work in 2000s-2010s Estonia / Rene Mäe

    Index Scriptorium Estoniae

    Mäe, Rene, 1987-

    2015-01-01

    Kultuuri- ja loovtöö representatsioonid 2000.- 2010. aastate Eestis. Põgusalt mõjukatest kultuuri- ja kunstisotsioloogilistest lähenemistest ja viimaste aastate kultuurilise töö uuringutest. Ernesto Laclau diskursuseteooria põhiseisukohad

  7. New purification and upgrading technologies for biogas; Nya renings- och uppgraderingstekniker foer biogas

    Energy Technology Data Exchange (ETDEWEB)

    Johan Benjaminsson [Linkoeping Univ. (Sweden)

    2006-04-15

    Biogas is a renewable energy source that is produced by anaerobic digestion of organic material. In Sweden, biogas predominately comes from sewage water sludge and landfills or from organic waste of households and industries. Small scale digestion plants at farms are especially expected to contribute to increased biogas production in the future. Biogas can be obtained directly in its raw form and used as fuel in a combustion chamber. However, gas engines require biogas purification from hydrogen sulphide and drying from water to avoid corrosion. In order to increase the calorific value, carbon dioxide is separated and the Swedish Standard Type A requires the methane content to be 97 % for vehicle gas. In the gas treatment process from biogas to vehicle gas, the upgrading step when carbon dioxide is separated represents the highest cost since conventional upgrading techniques require high investments. This makes the upgrading costs for smaller biogas plants relatively high. In this master thesis, six upgrading methods have been evaluated and four of them are expected to be commercialized within two years. The following upgrading methods are of interest for Sweden: - In situ methane enrichment; air desorbs carbon dioxide from the sludge in a desorption column. The method is intended for digestion of sewage water sludge and the total upgrading cost is approximately 0,13 kr/kWh by a raw biogas flow 62,5 Nm{sup 3}/h. - Small scale water scrubber; carbon dioxide is absorbed in water under enhanced pressure. The upgrading process is very similar to the conventional water scrubbing technique and the total upgrading cost is approximately 0,42 kr/kWh by a raw biogas flow of 12 Nm{sup 3}/h. - Cryogenic upgrading; the biogas is chilled to under -85 deg C under a pressure of at least 5,2 barg and carbon dioxide can be separated in the liquid phase. The total upgrading cost is approximately 0,12 kr/kWh by a raw biogas flow of 150 Nm{sup 3}/h. The total upgrading cost can be reduced if the recovered liquid carbon dioxide can be sold. - Membrane technique; biogas is upgraded with polymeric membranes that are permeable for carbon dioxide but not for methane molecules. The method is expected to be adaptable for both smaller and bigger biogas plants and the total upgrading cost is approximately 0,14 kr/kWh by a raw biogas flow of 180 Nm{sup 3}/h. All above mentioned upgrading techniques have methane losses less than two percent and all methods except for the in situ methane enrichment are expected to upgrade biogas to vehicle gas according to the Swedish Standard. In situ methane is expected to upgrade biogas up to 95 % methane content. By combustion of unpurified landfill gas in a gas engine, corrosive combustion products and white deposits are formed. Purification of landfill gas can decrease maintenance costs for gas engines. Two landfill gas purification methods have been evaluated and with the first method, contaminants are trapped in ice crystals when the gas is chilled to -25 deg C. The second method purifies landfill gas with condensed carbon dioxide. An important result of the master thesis is that the in situ methane enrichment has a chance to become an interesting alternative for smaller sewage treatment plants but the method requires additional upgrading to reach 97 % methane content. The most important conclusion is that cryogenic upgrading and membrane technique are expected to satisfy the Swedish Standard. The methods have relatively low upgrading costs and the methane losses are less than two percent. This gives them a good chance to established in Sweden.

  8. Regstellende aksie : die omvang en implementering daarvan in die werkplek / Rene Hilary Cheryl-Anne Koraan

    OpenAIRE

    2004-01-01

    The rationale behind affirmative action is the endeavour to address the inequalities and injustices created by discrimination in the past. Affirmative action was implemented in 1994 via the Constitution of the Republic of South Africa, 1996. Section 9(2) of the Constitution is known as the affirmative action clause. The United States of America was one of the first countries to implement affirmative action. The Constitution provides that all people have the right to equality. The legislatu...

  9. Energy efficient aerobic treatment of forest industry wastewaters; Energieffektiv aerob rening av skogsindustriella avloppsvatten

    Energy Technology Data Exchange (ETDEWEB)

    Sandberg, Maria; From-Aldaron, Mattias

    2011-01-15

    There is great potential to reduce energy requirements in aerobic biological purification if the oxygen demand can be reduced and oxygen delivery, when process water is aerated, is made more efficient. A model was developed to estimate the possible reduction in oxygen demand. Model variables were COD reduction, sludge withdrawal, oxygen, and alpha-value. Attempts made in an aerator in the lab-scale process shows that water content strongly affects oxygen transport and alpha-value. Surface active extract substances such as fatty acids and resin acids have greatest significance. The effect increases with the concentration of extract substances and decreases with added sodium chloride content

  10. Uudised : Kaljuste avas festivali Amsterdamis. Rene Eespere "Ritus" Euroraadios. "Lucretia teotamise" kontsertettekanne / Priit Kuusk

    Index Scriptorium Estoniae

    Kuusk, Priit, 1938-

    1999-01-01

    7. nov. juhatas T.Kaljuste Amsterdamis festivali "New Spirituality in Music" avakontserti, 10. nov. anti talle üle Robert Edleri auhind. Euroopa kooride rahvusvahelisel raadiokonkursil "Let The Peoples Sing 1999" finaalis esitas taani kammerkoor R. Eespere teose "Ritus". 18. nov. toimub Vanemuise kontserdimajas B.Britteni ooperi "Lucretia teotamine" kontsertettekanne, mis on teose esiettekanne Eestis. 26.-28. nov. toimub EMAs 33. Balti muusikateaduse konverents "Muusikateadus Baltimaades"

  11. History war i 1990 årene i USA - kampen mellom H og h

    Directory of Open Access Journals (Sweden)

    Elisabeth Buk-Berge

    2005-01-01

    Full Text Available The publication of The National Standards for History in the US in1994 has generated right wing rancor and accusations in the mediaand from the floors of Congress. In the simplest of terms, the authorsof Standards have been charged not just with having been “politicallycorrect”, but with being “thieves”, “hijackers”, and “balkanizers” ofAmerica. The Standards challenged traditional conceptions of na-tional history and became a major battleground in the culture wars inthe US. In 1995, the United States Senate passed, by a vote of 99 to 1,a resolution condemning The National Standards for History. TheStandards were revised in 1996. The controversy over Standards canbe designated as “history war”, a part of a wider “culture war” wherethe dispute is between groups who hold fundamentally opposingvisions of the meaning of America: what it has been, what it is, andwhat it should be. In this “war”, history as a school subject tends tobe reduced to ideology, a means through which the social and politicalinterests of each side of the culture divide are legitimated.

  12. Europarlamendi sotside liider soovib EL-ile selgemat juhtimist / Enrique Baron Crespo ; interv. Rene Tammist

    Index Scriptorium Estoniae

    Crespo, Enrique Baron

    2001-01-01

    Europarlamendi (EP) otsuste mõju tavakodaniku elule. Kodaniku võimalus sekkuda EP tegevusse. Erinevused EP ja liikmesriikide parlamentide vahel. Sotsiaaldemokraatide roll Euroopa integratsioonis ja EP-s. EP areng tulevikus. EL-iga liitumise mõju Mõõdukate partei siseelule

  13. Sinise ookeani strateegia : konkurentsi vältimise kunst / W. Chan Kim, Renee Mauborgne

    Index Scriptorium Estoniae

    Kim, W. Chan, 1952-

    2006-01-01

    Sinise ookeani strateegia õpetab, kuidas tegutseda konkurentidest vabal turul. Kommenteerib Hansapanga juhatuse esimees Erkki Raasuke. Lisad: Sinine ookean Tartus; Punane ookean versus sinine ookean. Tabel: Sinise ookeani loomise ajaloost

  14. Sinise ookeani strateegia : konkurentsi vältimise kunst / W. Chan Kim, Renee Mauborgne

    Index Scriptorium Estoniae

    Kim, W. Chan, 1952-

    2006-01-01

    Sinise ookeani strateegia õpetab, kuidas tegutseda konkurentidest vabal turul. Kommenteerib Hansapanga juhatuse esimees Erkki Raasuke. Lisad: Sinine ookean Tartus; Punane ookean versus sinine ookean. Tabel: Sinise ookeani loomise ajaloost

  15. Culture, economy and work in 2000s-2010s Estonia / Rene Mäe

    Index Scriptorium Estoniae

    Mäe, Rene, 1987-

    2015-01-01

    Kultuuri- ja loovtöö representatsioonid 2000.- 2010. aastate Eestis. Põgusalt mõjukatest kultuuri- ja kunstisotsioloogilistest lähenemistest ja viimaste aastate kultuurilise töö uuringutest. Ernesto Laclau diskursuseteooria põhiseisukohad

  16. Hiina transiidi eelduse loob uus konteinerterminal / Rene Varek ; interv. Tanel Raig

    Index Scriptorium Estoniae

    Varek, Rene, 1972-

    2007-01-01

    Eesti Raudtee, Eesti valitsuse ning Tallinna ja Sillamäe sadama osast Hiina kaupade transiidi jõudmises Eestisse, konteinerterminali rajamise tähtsusest. Küsimusele vastab AS-i Tallinna Sadam juhatuse esimees Ain Kaljurand

  17. Rene Saldana's "The Jumping Tree": Exploring Childhood Universals through a Hispanic Novel

    Science.gov (United States)

    Newman, Beatrice Mendez

    2006-01-01

    In "The Jumping Tree", set in Nuevo Penitas, an actual South Texas town, 12-year-old Rey Castaneda recounts landmark events in his journey toward becoming a man. Rey's stories of his childhood escapades, adventures, and everyday experiences could be anyone's childhood stories. When readers have finished the last page, they have relived the…

  18. Aerobic effluent treatment with lower electric power consumption. Survey of results from questionnaire sent out to Swedish pulp and paper mills with biological effluent treatment plants; Aerob rening med laegre elfoerbrukning. Sammanstaellning av enkaetsvar fraan svenska skogsindustrier med biologisk rening

    Energy Technology Data Exchange (ETDEWEB)

    Sivard, Aasa; Simon, Olle

    2010-12-15

    A survey of the energy situation at 23 Swedish pulp and paper mills with aerobic effluent treatment plants has been performed. The electricity consumption for aeration equipment is about 80 % of the total electricity consumption. Proposed measures to increase energy efficiency are regular measurements of energy consumption, better control of the oxygen level in some mills and evaluation of measures to use the heat in process effluent before and after biological treatment

  19. Intensity modulated radiation therapy: Analysis of patient specific quality control results, experience of Rene-Gauducheau Centre; Radiotherapie conformationnelle avec modulation d'intensite: analyse des resultats des controles precliniques, experience du centre Rene-Gauducheau

    Energy Technology Data Exchange (ETDEWEB)

    Chiavassa, S.; Brunet, G.; Gaudaire, S.; Munos-Llagostera, C.; Delpon, G.; Lisbona, A. [Service de physique medicale, centre Rene-Gauducheau, CLCC Nantes Atlantique, site hospitalier Nord, boulevard Jacques-Monod, 44805 Nantes Saint-Herblain cedex (France)

    2011-07-15

    Purpose. - Systematic verifications of patient's specific intensity-modulated radiation treatments are usually performed with absolute and relative measurements. The results constitute a database which allows the identification of potential systematic errors. Material and methods. - We analyzed 1270 beams distributed in 232 treatment plans. Step-and-shoot intensity-modulated radiation treatments were performed with a Clinac (6 and 23 MV) and sliding window intensity-modulated radiation treatments with a Novalis (6 MV). Results. - The distributions obtained do not show systematic error and all the control meet specified tolerances. Conclusion. - These results allow us to reduce controls specific patients for treatments performed under identical conditions (location, optimization and segmentation parameters of treatment planning system, etc.). (authors)

  20. Opvækstvilkårenes betydning for førtidspensionering. En case-kontrolundersøgelse blandt specialarbejdere

    DEFF Research Database (Denmark)

    Hasle, H; Jeune, B

    1989-01-01

    The significance of the conditions in childhood and adolescence for awarding of disability pension is illustrated by means of a case-control design with persons matched according to age, sex and type of work. The group investigated consisted of 581 general male workers who received middle...... or highest disability pension and 1,550 control persons. No significant differences were found between the case and control group as regards the occupation of the father, unemployment of the father, illness or disability pension in the parents, economical problems during childhood, growing up in the parental...

  1. Spesialisering eller samvirke? Om skulptur og arkitektur i gjenreisnings- og vekstårene etter andre verdenskrig

    Directory of Open Access Journals (Sweden)

    Svein Aamold

    2015-12-01

    Full Text Available One of the characteristics of modernist art and architecture is the insistence on autonomy. What happens if the two media are combined? Will they activate new artistic values – or will their insistence on individual autonomy lead to a differentiation which negates any true dialogue bearing on their status as works of art? These questions are discussed with references to sculptures by Georg Kolbe, Antoine Pevsner, Barbara Hepworth, Jean Arp, Arnold Haukeland and Ramon Isern; and the architecture of Ludwig Mies van der Rohe, Walter Gropius and Erling Viksjø. Also central to these topics are the public debates between architects, sculptors and architectural historians in Europe and America during the first decades after the Second World War. The issues regarding a possible integration of sculpture and architecture were highly contested during these years of optimism and economic growth. For some, the idea of a union between the two media proved to be an ideal that was perhaps never fully accomplished. Many sculptors, however, wanted to create works intended for public spaces, whether in architectural urban settings or in landscapes. Among the architects, the opinions differed from a refusal to include any works of art as part of their buildings, to those who involved in collaborative projects with artists. Others maintained that a new spatial unity could be achieved based on joint efforts on equal terms between sculptors and architects.

  2. A Study of Rene Descartes' Methodology of "Scepticism"%笛卡儿"怀疑"的方法论研究

    Institute of Scientific and Technical Information of China (English)

    李晓莉; 田广研

    2007-01-01

    笛卡儿以理性为指导,以扬弃的方法和敢于怀疑一切的勇气寻求新知识的方法论原则,这种从"怀疑"开始的思维开辟了创新思维的先河,提出了研究事物的方法的重要性.在这个追求创新的时代,对我们现代人来说,转换思维方式以提高创新思维能力和勇气,进行理论和实践创新,在现实经济体制改革中选择适当的经济行为模式,正确认识处理社会出现的种种问题,具有一定的理论意义和现实意义.

  3. Varatrükise fragmentide leiust läbi oletuste atribueerimiseni / Rene Haljasmäe

    Index Scriptorium Estoniae

    Haljasmäe, Rene, 1973-

    2009-01-01

    TLÜAR-i kogu täienes kahe inkunaablilehega. Lehed leiti Angelo Carletti di Chivasso "Summa angelica de casibus conscientiae" kaante vahelt, mis valmis Nürnbergis Anton Kobergeri trükikojas 28.08.1488. Tegemist on 48-realise palveraamatu lehekülgede ning 1485. a trükitud Piibli leheküljega

  4. Study of the Isothermal Oxidation Process and Phase Transformations in B2-(Ni,PtAl/RENE-N5 System

    Directory of Open Access Journals (Sweden)

    Luis Alberto Cáceres-Díaz

    2016-09-01

    Full Text Available Changes in composition, crystal structure and phase transformations of B2-(Ni,PtAl coatings upon isothermal oxidation experiments (natural and scale free oxidation at 1100 °C, as a function of time beyond their martensitic transformation, are reported. Specifically, the analysis of lattice parameter and composition are performed to identify changes in the B2-(Ni,PtAl phase upon the chemically-driven L10-(Ni,PtAl and L12-(Ni,Pt3Al transformations. The B2-(Ni,PtAl phase was found to disorder and transform the martensite during the heat treatments for both oxidation experiments at approximately 36.3 and 40.9 at. % of Al, 47.7 and 42.9 at. % of Ni, 6.2 and 8.5 at. % of Pt, 4.2 and 2.9 at. % of Cr and 4.4 and 3.8 at. % of Co. The lattice constant and the long-range order parameter of the B2-(Ni,PtAl phase decreased linearly as a function of the elemental content irrespective of the nature of the oxidation experiments.

  5. Ny arkitektur for nordmenn i Iowa. Arkitekt C.H. Griese, Luther College og kirker i 1860-årene

    Directory of Open Access Journals (Sweden)

    Jens Christian Eldal

    2015-12-01

    Full Text Available The Norwegian Evangelical-Lutheran Church in America decided in 1861 to build their first college close to the western frontier of The Upper Midwest. The site chosen was a bluff above Upper Iowa River, highly visible from Decorah, a small town founded only 12 years earlier, few years after the first settlers arrived. The college building became a relatively vast structure erected between 1862 and 1865, completed to its originally planned symmetrical composition in 1874. The building style and its composition were common among American colleges and universities further east in the US. It is also demonstrated how the Luther College building façade in composition and detailing shows clear influences from a specific German building. This particular building has been designated as especially typical of the German Rundbogenstil (Style of the Rounded Arch with its great mix of various stylistic elements. The architect was known as C. H. Griese from Cleveland, Ohio. He is identified as Charles Henry Griese (1821–1909, who immigrated from Germany about 1850 and was known as a mason and contractor, from now on also as an architect. In 1869, Griese also designed the three Norwegian Lutheran churches of Washington Prairie, Stavanger and Glenwood in rural Decorah. They represented a Neo Gothic style which was new to the area, and had an evident architectural character contrasting the more ordinary vernacular churches in the area. They signify a change of style and, like the college building, they demonstrate architectural ambitions new to these Norwegians, giving insight also into the general architectural and vernacular development in the area.

  6. Experiences of membrane technique in flue gas condensate treatment applications; Utvaerdering av erfarenheter av membranteknik foer rening av roekgaskondensat

    Energy Technology Data Exchange (ETDEWEB)

    Goldschmidt, Barbara; Ekdahl, Emma; Hellman, Mats

    2009-07-01

    Investing in a flue gas condensate treatment plant often turns out to be very profitable. The profitability comes from savings in energy and water consumption when treated waste water is recirculated, and also from savings in the NO{sub x} fee as condensate treatment allows for higher ammonia injection rates in the SNCR (NO{sub x} reduction) system. The membrane based technologies for flue gas treatment, which were investigated in this report, have proven to be successful and are operating well. However, they require that the project management is committed and acquaint themselves with the technology to avoid problems during commissioning and operation. In this project, experience with membrane based flue gas condensate treatment at ten different plants was investigated and evaluated. The ten plants are either biomass fired plants or co-combustion plants using a mixture of biomass and industrial waste. Membrane based flue gas condensate treatment is used by circa ten Swedish plants (Ultra Filtration membranes and/or Reverse Osmosis membranes, and at some plants also membranes for ammonia and carbon dioxide removal). All plants are biomass fired plants or co-combustion plants using a mixture of biomass and industrial waste. In Sweden, no plant firing municipal waste has yet been equipped with membrane based flue gas condensate treatment. These plants usually use precipitation and filtration technologies instead. Also the purpose of the condensation step is primarily to operate as a wet flue gas cleaning step. The heat recovery is of subordinate importance. Typical for these plants is also that they use condensation in several steps. The condensates from the different steps are often treated separately, as they may be of very different qualities. The RO unit is the main equipment in a membrane based water treatment plant. Pre-treatment and post-treatment of the RO water is adjusted to the incoming condensate quality, and to the requirements on the effluent. The reject water volumes of the visited RO plants are between 13 and 30%, based on RO inlet volume. The reject water percentage is dependent on the design of the RO plant. Double or triple pass RO design causes an increase in reject percentage, whereas recirculation of reject from the last RO stages helps to decrease reject percentage, and hence increases the total permeate yield. Eight of the visited plants are equipped with a UF unit as a pre-treatment step. Two plants use sand filters instead. At the time when condensate treatment equipment was installed at these two plants, UF technology was not yet used in this type of applications. The plants with UF pre-treatment have a Vibra Screen filter installed before the UF unit. In some cases additional pre-treatment is installed. Several plants have carbon dioxide removal installed before the UF unit, two plants have ammonia removal before the UF unit, one plant has precipitation and one plant has a sand filter in addition to the Vibra Screen filter. One plant has a UV generator installed before the UF unit, to prevent bacterial growth in the membranes. The concentrate, or reject, from the RO plant is relatively particle free but enriched in dissolved solids. Seven of the plants are equipped with ammonia removal. ammonia is removed either by membranes, by strippers or in the humidifier of the flue gas condenser. Almost all visited plants have high availability today. However, it often took several years to reach this goal. Reconstructions and completions with additional equipment have been made to the original installations. One plant has an availability of only 50% after eighteen months operation, and has still not been approved for trial operation. As an average, 12 hours per week of maintenance is required for the flue gas condensate treatment plants. A common feature of the visited plants is, that only pH is monitored in the inlet water to the condensate treatment plant. Although monitoring of conductivity would give valuable information on variations in condensate quality and possible operational problems, conductivity is not monitored in any plant. Manual sampling is limited to occasional samples taken to control on-line instrumentation, and to samples which are collected to control heavy metal emission to the recipient. These samples are analyzed by external laboratory at regular intervals, e.g. monthly. All the visited plants, except one, have integrated the control of the condensate treatment plant in their central control system. Normally, the condensate treatment plant can also be controlled and monitored locally to some extent

  7. Varatrükise fragmentide leiust läbi oletuste atribueerimiseni / Rene Haljasmäe

    Index Scriptorium Estoniae

    Haljasmäe, Rene, 1973-

    2009-01-01

    TLÜAR-i kogu täienes kahe inkunaablilehega. Lehed leiti Angelo Carletti di Chivasso "Summa angelica de casibus conscientiae" kaante vahelt, mis valmis Nürnbergis Anton Kobergeri trükikojas 28.08.1488. Tegemist on 48-realise palveraamatu lehekülgede ning 1485. a trükitud Piibli leheküljega

  8. 赏析雷内·马格里特(Rene Magritte)代表作《天降》

    Institute of Scientific and Technical Information of China (English)

    赵鹏程

    2013-01-01

    雷内·马格里特是欧洲盛名的艺术家,在他众多的艺术作品中,很多作品影响了今日许多插画风格.本文从其代表作《天降》入题分析,对该画的背景和创造艺术进行赏析.

  9. The future of clean energy, from vision to a real alternative; Fremtidens rene energisystem, fra visjon til reelt alternativ

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2012-07-01

    Research on environment-protecting and renewable energy has been a high national priority in recent years. Research in this field for the first time were brought together in one program when RENERGI was established in 2004. For nearly 10 years, RENERGI has been central to the public funding of energy research and, not least, helped a good structuring of competence building.(eb)

  10. Stigmasterol from Eichhornia crassipes (water hyacinth) : Isolation, characterization and X-ray structure

    Digital Repository Service at National Institute of Oceanography (India)

    Singh, K.S.; Sawant, S.G.; PrabhaDevi; Kaminsky, W.

    >H48O by combination of NMR and mass spectroscopic data The sterol was fully characterized by FTIR,NMR(1H13C) and mass spectral data Solid state structure of the sterol was determined by single crystal X-Ray diffraction...

  11. Mercury heavy-metal-induced physiochemical changes and genotoxic alterations in water hyacinths [Eichhornia crassipes (Mart.)].

    Science.gov (United States)

    Malar, Srinivasan; Sahi, Shivendra Vikram; Favas, Paulo J C; Venkatachalam, Perumal

    2015-03-01

    Mercury heavy metal pollution has become an important environmental problem worldwide. Accumulation of mercury ions by plants may disrupt many cellular functions and block normal growth and development. To assess mercury heavy metal toxicity, we performed an experiment focusing on the responses of Eichhornia crassipes to mercury-induced oxidative stress. E. crassipes seedlings were exposed to varying concentrations of mercury to investigate the level of mercury ions accumulation, changes in growth patterns, antioxidant defense mechanisms, and DNA damage under hydroponics system. Results showed that plant growth rate was significantly inhibited (52 %) at 50 mg/L treatment. Accumulation of mercury ion level were 1.99 mg/g dry weight, 1.74 mg/g dry weight, and 1.39 mg/g dry weight in root, leaf, and petiole tissues, respectively. There was a decreasing trend for chlorophyll a, b, and carotenoids with increasing the concentration of mercury ions. Both the ascorbate peroxidase and malondialdehyde contents showed increased trend in leaves and roots up to 30 mg/L mercury treatment and slightly decreased at the higher concentrations. There was a positive correlation between heavy metal dose and superoxide dismutase, catalase, and peroxidase antioxidative enzyme activities which could be used as biomarkers to monitor pollution in E. crassipes. Due to heavy metal stress, some of the normal DNA bands were disappeared and additional bands were amplified compared to the control in the random amplified polymorphic DNA (RAPD) profile. Random amplified polymorphic DNA results indicated that genomic template stability was significantly affected by mercury heavy metal treatment. We concluded that DNA changes determined by random amplified polymorphic DNA assay evolved a useful molecular marker for detection of genotoxic effects of mercury heavy metal contamination in plant species.

  12. 77 FR 39965 - Endangered and Threatened Wildlife and Plants; Listing the Hyacinth Macaw

    Science.gov (United States)

    2012-07-06

    ... nongovernmental organizations, Rede Cerrado, has been established to promote local sustainable-use practices for natural resources (Klink and Machado 2005, p. 710). Rede Cerrado provided the Brazilian Ministry of the...

  13. Non-invasive genetic sampling for molecular sexing and microsatellite genotyping of hyacinth macaw (Anodorhynchus hyacinthinus

    Directory of Open Access Journals (Sweden)

    Flavia T. Presti

    2013-01-01

    Full Text Available Molted feather sampling is a useful tool for genetic analyses of endangered species, but it is often very laborious due to the low quality and quantity of the DNA obtained. In the present study we show the parts of feathers that resulted in better yield of DNA. In descending order these were: blood clot outside the umbilicus, umbilicus (without blood clot, tip, inner membrane, and small calamus. Compared to DNA extracted from blood samples, DNA extracted from feathers produced microsatellite alleles of poorer quality and had to be processed immediately after extraction. As expected due to the level of DNA degradation, molecular sexing protocols that result in shorter PCR products were more efficient.

  14. Antioxidant potential of water hyacinth (Eichornia crassipes): In vitro antioxidant activity and phenolic composition

    DEFF Research Database (Denmark)

    Surendraraj, A.; Farvin, Sabeena; Anandan, R.

    2013-01-01

    scavenging ability, iron chelating activity, reducing power, and prevention of oxidation in a liposome model system); and (c) its effectiveness in retarding lipid peroxidation in fish oil by accelerated stability test. Significant differences were observed in total and individual phenolic contents....... Ethanolic extracts of flower, which contained the highest total phenolic content, were found to have high DPPH radical scavenging activity and reducing power. However, ethanolic extracts of leaf exerted a high Fe2+ chelating activity and also inhibited lipid peroxidation process both in liposomes and fish...

  15. Trichoptera (Insecta in water hyacinth roots: evaluation of the influence of exotic mussel and environmental factors

    Directory of Open Access Journals (Sweden)

    Sandra Francisca Marçal

    2015-12-01

    Full Text Available Abstract Aim: Information on the influence of mussel macrofouling in invertebrate communities usually have the initial assumption of negative interference. Methods We analyzed this relationship in a community of aquatic invertebrates associated to roots of Eichhornia crassipes in 15 shallow marginal lakes in the Pantanal National Park and surroundings. We sampled quadrants of floating vegetation, identified the aggregate fauna and evaluated the density effect of Limnoperna fortunei, as well as abiotic factors of the Trichoptera community using ordinances and multivariate regressions. Results We found no significant relationship between the abundance of mussels on the macrophytes and the Trichoptera larvae. However, we observed an interference of oxygen on the structure and density of genera. The composition and abundance of the phytophylous caddisfly community is influenced by the depth and the concentration of oxygen dissolved in the marginal regions of the lakes. Conclusions We suggest that the absence of the effects of the assessed L. fortunei in the community is related to the 'biotic resistance', in which the phytophylous caddisfly demonstrated adaptation to an environment characterized by hypoxic conditions in the dry season. L. fortunei was limited by the depth and reduction of oxygen, presenting lower density in lakes with such characteristics.

  16. Non-invasive genetic sampling for molecular sexing and microsatellite genotyping of hyacinth macaw (Anodorhynchus hyacinthinus)

    Science.gov (United States)

    Presti, Flavia T.; Meyer, Janaína; Antas, Paulo T.Z.; Guedes, Neiva M.R.; Miyaki, Cristina Y.

    2013-01-01

    Molted feather sampling is a useful tool for genetic analyses of endangered species, but it is often very laborious due to the low quality and quantity of the DNA obtained. In the present study we show the parts of feathers that resulted in better yield of DNA. In descending order these were: blood clot outside the umbilicus, umbilicus (without blood clot), tip, inner membrane, and small calamus. Compared to DNA extracted from blood samples, DNA extracted from feathers produced microsatellite alleles of poorer quality and had to be processed immediately after extraction. As expected due to the level of DNA degradation, molecular sexing protocols that result in shorter PCR products were more efficient. PMID:23569419

  17. Antioxidant potential of water hyacinth (Eichornia crassipes): In vitro antioxidant activity and phenolic composition

    DEFF Research Database (Denmark)

    Surendraraj, Alagarsamy; Farvin, Sabeena; Anandan, R.

    2011-01-01

    The aims of the present study were (a) to extract and quantify the main phenolic acids and tocopherols from the petiole, leaf and flowers of Eichornia crassipes, (b) to evaluate the antioxidant capacity of the extracts in four in vitro systems (DPPH radical scavenging ability, iron chelating acti...

  18. Ectopic expression of a hyacinth AGL6 homolog caused earlier flowering and homeotic conversion in Arabidopsis

    Institute of Scientific and Technical Information of China (English)

    FAN; JinHui; LI; WenQing; DONG; XiuChun; GUO; Wei; SHU; HuaiRui

    2007-01-01

    MADS-box genes are involved in floral organ development. Here we report that an AGL6(Agamous-like 6)-like MADS-box gene, HoAGL6, was isolated from Hyacinthus orientalis L. Expression pattern analysis demonstrated that HoAGL6 transcript was detected in inflorescence buds, tepals, carpels and ovules, but not in stamina, leaves or scales. Transgenic Arabidopsis plants ectopically expressing HoAGL6 exhibited novel phenotypes of significantly reduced plant size, extremely early flowering, and losing inflorescence indeterminacy. In addition, wide homeotic conversion of sepals, petals, and leaves into carpel-like or ovary structures, and disappearance or number reduction of stamens in 35S::HoAGL6 Arabidopsis plants were also observed. RT-PCR analysis indicated that the expressions of flowering time gene SOC1 and flower meristem identity gene LFY were significantly up-regulated in 35S::HoAGL6 transgenic Arabidopsis plants, and the expression levels of floral organ identity genes AG and SEP1 in leaves were also elevated. These results indicated that HoAGL6 was involved in the regulation of flower transition and flower organ formation.

  19. Antioxidant potential of water hyacinth (Eichornia crassipes): In vitro antioxidant activity and phenolic composition

    DEFF Research Database (Denmark)

    Surendraraj, Alagarsamy; Farvin, Sabeena; Anandan, R.

    2011-01-01

    the various parts of E. crassipes. Out of the 11 phenolic acids analysed, ethanolic extracts contained high amounts gallic, protocatechuic, gentisic and phydroxybenzoic acid, whereas, water extracts contained less amounts of varied number of phenolic acids. Ethanolic extracts of flower, which contained......The aims of the present study were (a) to extract and quantify the main phenolic acids and tocopherols from the petiole, leaf and flowers of Eichornia crassipes, (b) to evaluate the antioxidant capacity of the extracts in four in vitro systems (DPPH radical scavenging ability, iron chelating...

  20. Evaluation of Water hyacinth and Paddy Straw Waste for Culture of Oyster Mushrooms

    OpenAIRE

    Nageswaran, M.; Gopalakrishnan, A.; M. Ganesan; Vedhamurthy, A.

    2003-01-01

    Waterhyacinth ( Eichhornia crassipes (Mart.) Solms.) was evaluated at ratios of 25, 50 and 75% with paddy straw ( Oryza sativa L.) for oyster mushroom ( Pleurotus sajor-caju) cultivation. There was an increase in yield with decreasing ratio waterhyacinth.

  1. Nanostructured MnO2 catalyst in E. crassipes (water hyacinth for indigo carmine degradation

    Directory of Open Access Journals (Sweden)

    Tatiana Cuervo Blanco

    2016-11-01

    Full Text Available The use of water hyacinth’s dried matter (Eichhornia crasippes as a support matrix for nano-MnO2 and its application for the removal of indigo carmine (IC was studied. Different pretreatment processes were tested and results indicated that an acid-alkali pretreatment is an efficient method to binding nanoparticles (NPs to cellulosic matrix. In adittion, the MnO2 NPs were synthesized by sonochemical reduction of MnO4- using different methods (ultrasonic horn system, ultrasonic bath and reaction with ethanol, where the influence of the precursor concentration was observed. The synthesized material was further characterized by ATR-IR, AAS, XRD, SEM, nitrogen isotherms adsorption, EDS, and pHpzc. The IC removal capacity of the nanostructured material, the chemical nature of the degradation products and the effect of various parameters (temperature, pH, initial IC concentration, among others were explored in water samples. After this process, the material, obtained by the ultrasonic bath method, was able to remove 97.6% of IC color in five min, without losing dye degradability efficiency for several consecutive cycles. Through this approach, environmental dangerous effluents from many commercial activities such as textile industry can be efficiently removed with low cost, using synthesize process biodegradable nanocomposite materials.

  2. Dust separation at high temperatures a method for cleaning fly ashes? Final report; Stoftavskiljning vid hoeg temperatur en metod foer rening av flygaska? Slutrapport

    Energy Technology Data Exchange (ETDEWEB)

    Zintl, Frank [TPS Termiska Processer AB, Nykoeping (Sweden)

    2002-12-01

    An experimental study of separation of fly ashes by a filter at high temperatures, 300-650 deg C, with the purpose to study: Capture of heavy metals (Cd, Hg, Pb, Zn) in the fly ash; Relation between heavy metal capture and temperature; Relation between heavy metal capture and the availability of fuel chlorine. Pelletized forestry waste fuel was doped with heavy metals in two different forms. Pelletized Salix was also used, without doping. The study shows that: There is a strong inverse relation between the capture of heavy metals and the filter temperature; There is a strong relation between the availability of chlorine and the capture of heavy metals. Separation at 300-650 deg C gives much less heavy metals in the fly ash, however the ash is not clean enough to allow disposal in ordinary landfills. Thus, high temperature filtering does not seem to be a promising solution for producing 'clean' fly ash.

  3. Et universitetsområde for fremtiden - Nygårdshøyden i Bergen. 1960-årenes ambisjoner, og ettertiden som tok dem ned

    Directory of Open Access Journals (Sweden)

    Siri Skjold Lexau

    2015-12-01

    Full Text Available The article investigates the development of a central area in the city of Bergen from the mid 1960s onwards, called Nygårdshøyden. Lying between two harbour areas, Puddefjorden and Vågen, this topographic ridge was pointed out for necessary university expansion. The architectural firm Andersson & Skjånes’ ambitious plans for a university campus which would totally eradicate the existing urban structure, was approved by the municipal government and the university administration.  New, effective and flexible building systems had been introduced at university campuses all over the world. In Bergen, some of the buildings originally planned as academic centres were erected according to the plan by Andersson & Skjånes. Others were modified and adapted to changing architectural ideals. The present situation shows clearly how the critique of huge-scale, late-modern architecture had an impact on further developments. Economic and aesthetic aspects combined with an increasing demand for the preservation of historical structures led to modifications of the huge master plans. The dynamics of inserting new architecture into historic neighbourhoods also represent advantages on different levels, creating a diversity of spaces and volumes. The proximity of the university area to the city centre and its urban features represents a quality for students and employees. In the end, large parts of the street pattern of the university area were kept, corresponding with the rest of the city’s building structure. A substantial part of the existing buildings of the area were transformed and adapted to university needs, and new buildings have been raised partly as infill and extension projects. In this way, the planning and development of Nygårdshøyden can tell us a lot about urban development and changing ideals through the last 50 years. In addition, as always when we are looking back, we see that priorities and criteria for preservation or demolition of existing urban structures change all the time.

  4. Optimization of lime addition in a dry air pollution control device; Optimerad rening av HCl och SO{sub 2} med minskade kalktillsatser vid torr roeasrening

    Energy Technology Data Exchange (ETDEWEB)

    Wikstroem-Blomqvist, Evalena; Samuelsson, Jessica; Ohlsson, Anna

    2006-12-15

    The focus of this project is to optimize the absorption of hydrochloric acid (HCl) and sulphuric acid (SO{sub 2}) in a dry air pollution control device system connected to a waste combustor. A significant amount of absorbent are generally added into the processes to achieve an efficient cleaning of the flue gas. Reduced absorbent consumption has double benefits on the operative expenses due to decreased purchase and landfilling costs. The objective was to study the affect of flue gas temperature and moisture, (relative humidity, RH), on the efficiency of HCl and SO{sub 2} absorption on hydrated lime. Additionally, the efficiency of a pre-treated hydrated lime with larger specific surface and pore volume was investigated. The measuring campaign was conducted on the 20 MW fluidized bed waste incinerator own by Boraas Energi och Miljoe AB in Sweden. Results from 26 experimental days with normal hydrated lime showed a positive correlation between the efficiency of the lime and RH in the flue gas. Four levels of RH between 3.28% to 4.84% were tested. The levels were adjusted by lowering the flue gas temperature and/or by adding water to the waste fuel. The smallest effect where achieved by solely adding water to the waste fuel. RH increased solely to 3.62% and the amount of lime consumption was reduced with only 5% compare to normal condition. By lowering the flue gas temperature 10 deg C to 143 deg C, RH increased to 4.06% and the amount of lime added was reduced with 13%. The largest impact was found when both the flue gas temperature and the moisture content were changed. At those process conditions RH reach 4.84 % and the usage of lime were reduced with 26%. Additional 12 experimental days were conducted to evaluate the efficiency of a pretreated hydrated lime with larger specific surface and pore volume. The results showed that the surface enlarged absorbent was almost twice as effective as the normal hydrated lime. Moreover, the results indicated an equal dependency of variation in RH (valid within temperature window between 145-165 deg C) for the surface enlarged absorbent as for the one identified for normal hydrate lime. Results that showed additional potential to reduce in the amount of surfaced enlarged absorbent needed by optimizing the processes further. The annual operative expenses of the studied waste combustor can be reduced by 700,000 SEK (100,000 USD) by increasing the RH to 4.5% and thus reduce the amount of added normal hydrate lime with 20%. Furthermore, the annual cost can be reduced with additionally 700,000 SEK by using an absorbent with higher specific surface and pore volume. Evaluation of an on-line FTIR-system measuring the levels of HCl and SO{sub 2} in the raw gas of the waste incinerator showed the 80% of the HCl was detected in the gas-phase and 20% were capture on the particles. Reverse results were obtained for SO{sub 2}. However, the levels of SO{sub 2} in the flue gas were rather low, which may have affected the results.

  5. Posti- ja kaubaveo turvalisusreeglite muudatused peale 11. septembrit 2001 : [bakalaureusetöö] / Marko Pokk ; Tartu Ülikooli Õigusinstituut ; juhendaja: Rene Ringas

    Index Scriptorium Estoniae

    Pokk, Marko

    2007-01-01

    Rahvusvahelise tsiviillennundusega tegelevad organisatsioonid ja nende lennundusjulgestusalane tegevus, siseriiklikud õigusaktid ja institutsioonid lennundusvaldkonnas, posti- ja kaubaveo ning -käsitlemise muudatused, problemaatika

  6. 关于笛卡尔普遍怀疑原则的哲学之思%Philosophical Study on Rene Descartes' Principle of Universal Scepticism

    Institute of Scientific and Technical Information of China (English)

    王冰雁

    2010-01-01

    @@ 一、笛卡尔普遍怀疑原则的提出 笛卡尔出生于16世纪末,活跃于新兴资产阶级已经在欧洲登上历史舞台并正积聚力量为其进一步发展壮大而斗争的时期.笛卡尔生活的时代,正是欧洲封建制度日趋没落,而新兴的资本主义制度正在萌芽,近代自然科学特别是数学、力学、物理学等学科都取得了重大成果.封建神学、经院哲学经过文艺复兴时期进步思想家们的批判,已经成为令人憎恶的东西.

  7. New Thoughts on Rene Descartes' Principle of Universal Scepticism%解读笛卡尔的普遍怀疑原则

    Institute of Scientific and Technical Information of China (English)

    戴海东; 周祖秋

    2002-01-01

    本文认为笛卡尔的普遍怀疑原则,就其思想体系来说是唯心主义的,但其理论勇气、科学态度、创新精神和对人的主体地位的肯定,在当时就促进了人的认识发展和社会进步,在现时仍有其认识论意义和社会意义.

  8. Of Invisible Innovation Sense in Rene Descartes's Skepticism%勒内·笛卡尔怀疑论中隐型的创新意识探究

    Institute of Scientific and Technical Information of China (English)

    王柏文

    2004-01-01

    创新,当今最时髦的话语之一.何谓创新?怎样培养创新意识、锻炼创新思维能力?可以从勒内·笛卡尔的普遍怀疑论哲学中探寻到最佳答案:怀疑--扬弃--实现科学与价值.

  9. Fourier` ridadega lähendamisest = On approximation by Fourier series : III koht magistritööde kategoorias / Rene Sadam

    Index Scriptorium Estoniae

    Sadam, Rene

    2009-01-01

    Artikkel tutvustab magistritöös käsitletud lähendamise probleeme, mis olid seotud peamiselt Fourier` ridadega, kesksemaks teemaks võis pidada Gibbsi fenomeni. Töös kirjeldati samuti trigonomeetriliste funktsioonidega lähendamist koolimatemaatika vahendeid kasutades

  10. Posti- ja kaubaveo turvalisusreeglite muudatused peale 11. septembrit 2001 : [bakalaureusetöö] / Marko Pokk ; Tartu Ülikooli Õigusinstituut ; juhendaja: Rene Ringas

    Index Scriptorium Estoniae

    Pokk, Marko

    2007-01-01

    Rahvusvahelise tsiviillennundusega tegelevad organisatsioonid ja nende lennundusjulgestusalane tegevus, siseriiklikud õigusaktid ja institutsioonid lennundusvaldkonnas, posti- ja kaubaveo ning -käsitlemise muudatused, problemaatika

  11. Metastase til os temporale som årsag til akut vestibulært syndrom og hørenedsættelse

    DEFF Research Database (Denmark)

    Grubbe Gregersen, Kristine; Hansen, Søren

    2013-01-01

    Metastasis to the petrous apex of the temporal bone may cause acute peripheral vestibular syndrome and impaired hearing or be asymptomatic. Contrast computed tomography should be performed to exclude pathology in the temporal bone in patients with vestibulocochlear deficit, a history of cancer...... and no findings on cerebral magnetic resonance imaging. We describe a case of a 61-year-old man with metastatic prostatic carcinoma to the temporal bone....

  12. Keelatud koostöö ettevõtjate vahel : Euroopa Ühenduse õigus ja Eesti konkurentsiõigus / Rene Frolov

    Index Scriptorium Estoniae

    Frolov, Rene, 1981-

    2003-01-01

    Kokkuleppe mõistest, Polypropylene'i kaasusest, ettevõtjate ühenduse otsustest, kooskõlastatud tegevusest, selle mõistest, kokkuleppe ja kooskõlastatud tegevuse eristamisest, artikli 81 rikkumisest

  13. Oxidation catalysts for cleaning of CO and TOC in flue gases - step 1; Oxidationskatalysatorer foer rening av ofoerbraenda roekgaser - etapp 1

    Energy Technology Data Exchange (ETDEWEB)

    Berg, Magnus [TPS Termiska Processer AB, Nykoeping (Sweden); Harnevie, H. [SwedPower AB (Sweden)

    2001-01-01

    Environmental demands on the firing of solid fuels are gradually being sharpened and will in the future be regulated by different EG directives. Of particular importance is an EG directive on the incineration and co-incineration of waste. Most fractions of recycled wood fuel will be included in this directive. In the directive, high demands are placed above all on the restriction of the release of unburned compounds such as CO, TOC and dioxins. In many cases, it will be very difficult to optimise combustion in order to reduce releases of these compounds in question to the level regulated by legislation. This has therefore led to the initiation of this project on oxidation catalysts as a tool in the reduction of such emission components. In this preliminary study, 11 suppliers of oxidation catalysts have been contacted on this issue. An investigation has been carried out into their principles and costs and also interest in the application of these. Of the suppliers interviewed, 7 were seriously interested in the current application and at least 5 can be considered interesting for further discussion at later stages. Based on the information received, it could also be noted that costs for monolithium catalysts which can clean 12.000 m{sup 3}{sub n} flue gas/hour varied between approximately 60.000 and 240.000 SEK. This flow of flue gas corresponds to the amount generated by a 5 MW plant fired with normal forest chips (50% TS). Within the scope of this stage, an application study of two boilers has also been carried out (Vattenfall's boiler at Swedish Match and Marbodal). In both cases, the catalysts are considered to be able to be assembled without much reconstruction. However, it remains uncertain whether the catalysts can endure the current concentration of particles in the flue gas duct or for Swedish Match also the concentration of HCl and SO{sub 2} respectively. Finally is a proposal of how continued work in this area should be carried out described. This should take place via a combination of work in both laboratory and full scale. During laboratory experiments, the sensitivity of the catalysts for variations in H{sub 2}O, HCl, SO{sub 2} and O{sub 2} should be examined. Full-scale attempts should include approximately 6 months continuous follow-up in two separate plants. Preferably a plant fired with a fuel containing both chlorine and sulphur and also preferably a plant that fires a fuel relatively free from both these components.

  14. Vygotsky's Fragile Genius in Time and Place: Essay Review of "Understanding Vygotsky: A Quest for Synthesis" by Rene van der Veer and Jaan Valsiner.

    Science.gov (United States)

    Youniss, James

    1994-01-01

    Briefly summarizes Vygotsky's life, the appeal and subsequent abandonment of his ideas in the 1960s, and renewal of interest in the 1970s and 1980s (often at the expense of Piaget). Praises van der Veer and Valsinger's book as a realistic picture of Vygotsky's background, life, and work, of the scientific and political context in Russia and of his…

  15. Managing the services supply chain in the Department of Defense: an empirical study of current management practices / by Aruna U. Apte, Uday M. Apte, and Rene G. Rendon.

    OpenAIRE

    Apte, Aruna U.; Uday M. Apte; Rendon, Rene G.

    2009-01-01

    This paper presents the results of our ongoing research on the management of services acquisition in the Department of Defense. In this empirical study we developed and used a web-based survey to collect data on the acquisition strategy, procurement methods, and contract types used at Air Force and Navy installations. Specifically, we studied the current management practices in such areas as life cycle approach, project management, organization/management structure, and training provided to s...

  16. Use and treatment of wastewater in vegetation filters of Salix. Final report; Utnyttjande och rening av avloppsvatten i vegetationsfilter av Salix. Slutrapport

    Energy Technology Data Exchange (ETDEWEB)

    Perttu, Kurth; Aronsson, Paer [Swedish Univ. of Agricultural Sciences, Uppsala (Sweden). Dept. of Short Rotation Forestry

    2000-11-01

    The general aim of the project was to combine municipal wastewater treatment using willow vegetation filters (WVF) with the production of biomass for energy purposes. The investigation contains two subprojects: (1) Determination of nitrogen and water uptake by WVF as a function of distance from the distribution points and the number of interjacent stools, and (2) Investigation of inconveniences and sanitary risks when irrigating WVF with municipal wastewaters.

  17. Fourier` ridadega lähendamisest = On approximation by Fourier series : III koht magistritööde kategoorias / Rene Sadam

    Index Scriptorium Estoniae

    Sadam, Rene

    2009-01-01

    Artikkel tutvustab magistritöös käsitletud lähendamise probleeme, mis olid seotud peamiselt Fourier` ridadega, kesksemaks teemaks võis pidada Gibbsi fenomeni. Töös kirjeldati samuti trigonomeetriliste funktsioonidega lähendamist koolimatemaatika vahendeid kasutades

  18. Evaluation of pine bark for treatment of water from biomass fueled plants; Utvaerdering av bark foer rening av vatten vid biobraensleeldade anlaeggningar

    Energy Technology Data Exchange (ETDEWEB)

    Hansson, Christina; Hansson, Helen; Hansson, Soeren [Carl Bro Energikonsult AB, Malmoe (Sweden)

    2004-01-01

    In Sweden, large amounts of pine bark are produced as a by-product from the pulp and forest industry. This makes pine bark available in large volumes to a relative low price. Pine bark has shown good absorption effect for organics pollutants, such as oil, in water and pine bark is used commercially as an oil absorbent. In a study the pine bark has also shown to have good absorption effects on heavy metals in water, in laboratory conditions. This indicates that pine bark also could be used as a natural absorbent for heavy metals in flue gas condensate and for leachate from biomass fuel storage. For the latter purpose the bark could be used as a combined heavy metal and oil absorber. In this project the pine barks ability to absorb heavy metals from flue gas condensate has been studied. The tests were performed using an untreated flue gas condensate, which was purified by using a basket filter with commercially available pine bark (trademark EcoBark) as absorbent. The bark filter has the same function as a tube reactor, which would imply that the absorption of heavy metals should be better than the laboratory tests. However, the results from the flue gas condensate tests showed much lower absorption of heavy metals than the laboratory tests. The only significant absorption levels were found for iron and mercury, which showed a reduction ratio of about 25 %. Other metals, such as lead, cadmium, copper, nickel, vanadium and zinc had a reduction ratio of about 10 %, which is quite low compared to the 98 % reduction for lead and about 80 % for copper and zinc that was achieved in the former laboratory tests. The most probable reason that the pine bark had a very low absorbent effect in the flue gas condensate is that the concentration of potassium and calcium restrains the ion exchange capacity of the pine bark. It is also likely that iron mainly is absorbed by the bark, while other metals only are separated as particles. Another possible reason for the rather poor absorption results in the flue gas condensate tests could be that iron affects the absorption of other metals. The water temperature could also have some influence on the results while the laboratory tests were performed at a considerably lower water temperature, 22 C. The flue gas condensate tests also included measurements of COD upstream and downstream the bark filter. The analyses shows that the COD concentration in the condensate upstream the filter is very low, 20-25 mg/litre, while the COD concentration downstream the filter is considerably higher, in the range 40 - 220 mg/litre. The COD before the filter probably originates from the small amount of char particles in the flue gas condensate and the increase of COD after the bark filter comes from humus that has been dissolved from the bark. The heavy metal absorption that has been analysed in the test with flue gas condensate should be comparable with heavy metal absorption from leachate from bio fuel storage, even if the water temperature in the latter case is lower.

  19. Rhizofiltration of Heavy Metals (Cadmium, Lead and Zinc From Fly Ash Leachates Using Water Hyacinth (Eichhornia Crassipes

    Directory of Open Access Journals (Sweden)

    Amit Kumar Yadav

    2015-02-01

    Full Text Available Fly ashes are usually contaminated with toxic heavy metals. These metals are leaching out aftercontact with water during wet disposal system, thus polluting the soil, surface and groundwater. In the present study, a hydroponics experiment was conducted to examine the removalof heavy metals Cd, Pb and Zn by Eichhornia crassipes grown at various concentration of fly ash ranging from 10, 20 and 40 percent over a period of 30 days.After 30 days, the plants were separately harvested, dried and weighedfor biomass of the roots and shoots. The uptake of each metalwas studied in the root and shoot separately, to determine the bioaccumulation of metals in Eichhornia crasspies.The translocation factor was calculated to study the efficiency of the plants forbioaccumulation of each metal in roots and shoot. The results showed that maximum uptake of metals Cd, Pb and Zn by plantwasfoundat the higher concentration (40% of fly ash.The metals uptake found was 99.16, 166.52 and 741.04 μg g-1 tissues in the roots, respectively and 33.46, 41.33 and 255.90 μgg-1 tissues in the shoots, respectively and successfullyremoved up to 78% of Cd, 82% of Pb and 70% of Zn.The maximum removal efficiency by plant for Cd, Pb and Zn at lower concentration (10% of fly ash was 84%, 86% and 75%, respectively.The heavy metals accumulated more in roots than in the shoots by Eichhornia crassipes. The maximum bioconcentration factor and translocation factor value of Eichhornia crappies for Cd, Pb and Zn were calculated as 705.55, 705.55 and 614.51 and 41.86, 47.18 and 34.53 respectively. The high removal efficiencies of heavy metals Cd, Pb and Zn was find without toxic effect by this aquatic macrophyte, thisplant can be recommended for the actual treatment of fly ash leachatesin ash pond to clean up the aquatic environment.DOI: http://dx.doi.org/10.3126/ije.v4i1.12187International Journal of Environment Volume-4, Issue-1, Dec-Feb 2014/15, page : 179-196   

  20. Hyperspectral reflectance features of water hyacinth growing under feeding stresses of Neochetina spp. and different heavy metal pollutants

    CSIR Research Space (South Africa)

    Newete, SW

    2014-01-01

    Full Text Available were correlated with the leaf chlorophyll content from the SPAD readings at the end of the experiment. Correlation results of mNDVI(sub705) was the highest followed by REP_LE. Cu-, Hg-, and Zn-treated plants showed significantly lower chlorophyll...

  1. The Utilization of Water Hyacinth (Eichhorniacrassipes) as Aquatic Macrophage Treatment System (AMATS) in Phytoremediation for Palm Oil Mill Effluent (POME)

    OpenAIRE

    Innocent Chukwunonso Ossai; Fauziah S. H.; Ghufran Redzwan

    2014-01-01

    The need for edible oil has increased resulting with a consequent boost in palm oil production. As a result, production of palm oil mill effluent (POME) which is one of the by-products of the milling process has also increased. In Malaysia, palm oil industry is identified as one of the agricultural industries that generate the highest pollution load into the rivers throughout the country. Some palm oil mills store POME in ponds or lagoons in the hope of treating and detoxifying it. Often ti...

  2. Use of an inexpensive chlorophyll meter to predict Nitrogen levels in leaf tissues of water hyacinth (Eichhornia crassipes (Mart.) Solms

    Science.gov (United States)

    Tissue nitrogen is also an important indicator of plant health and can be a useful predictor of plant vigor and susceptibility to disease and pests. Hence, knowing nitrogen content may aid in determining establishment success of plants used in restoration programs, including those destined for aqua...

  3. [The vitalism of Paul-Joseph Barthez (1734-1806)].

    Science.gov (United States)

    Han, Hee Jin

    2010-06-30

    In The Logic of Life (1970), Francois Jacob (1920- ), Nobel Prize laureate in Physiology or Medicine (1965), proclaimed the end of vitalism based on the concept of life. More than two decades before this capital sentence condemning vitalism was pronounced, Georges Canguilhem (1904-1995), a French philosopher of medicine, already acknowledged that eighteenth-century vitalism was scientifically retrograde and politically reactionary or counter-revolutionary insofar as it was rooted in the animism of Georg Ernst Stahl (1660-1734). The negative preconception of the term 'vitalism' came to be established as an orthodox view, since Claude Bernard (1813-1878) unfairly criticized contemporary vitalism in order to propagate his idea of experimental medicine. An eminent evolutionary biologist like Ernst Mayr (1904-2005) still defended similar views in This is Biology (1997), arguing that if vitalists were decisive and convincing in their rejection of the Cartesian model (negative heuristics), however they were equally indecisive and unconvincing in their own explanatory endeavors (positive heuristics). Historically speaking, vitalists came to the forefront for their outstanding criticism of Cartesian mechanism and physicochemical reductionism, while their innovative concepts and theories were underestimated and received much less attention. Is it true that vitalism was merely a pseudo-science, representing a kind of romanticism or mysticism in biomedical science? Did vitalists lack any positive heuristics in their biomedical research? Above all, what was actually the so.called 'vitalism'? This paper aims to reveal the positive heuristics of vitalism defined by Paul.Joseph Barthez (1734-1806) who was the founder of the vitalist school of Montpellier. To this end, his work and idea are introduced with regard to the vying doctrines in physiology and medicine. At the moment when he taught at the medical school of Montpellier, his colleagues advocated the mechanism of Rene

  4. Morphology of the female reproductive system and physiological age-grading of Megamelus scutellaris (Hemiptera: Delphacidae), a biological control agent of water hyacinth

    Science.gov (United States)

    The morphology of the female reproductive system in Megamelus scutellaris Berg (Hemiptera:Delphacidae), a biocontrol agent of Eichhornia crassipes (Mart.) Solms, was examined using standard light microscopy techniques. Ovaries extracted from individuals dissected in phosphate buffered saline were ex...

  5. Ultrafast spectroscopy studies on the mechanism of electron transfer and energy conversion in the isolated pseudo ginseng, water hyacinth and spinach chloroplasts

    Institute of Scientific and Technical Information of China (English)

    XU; Sichuan

    2001-01-01

    Chitosans with various degrees of deacetylation (D.D.), which were used as standard sample for FTIR determination, were prepared from completely deacetylated chitosan by homogeneous N-acetylation reaction. By combining four probable probe bands, i.e. 1655, 1560, 1380 and 1320 cm-1, eight probable reference bands, i.e. 3430, 2920, 2880, 1425, 1155, 1070, 1030 and 895 cm-1 and two baseline methods, the most suitable ratios Aprobe band/Areference band from IR spectra to determine the degree of acetylation of chitosan were evaluated from 48 combinations to be A1560/A2880, A1560/A2920 and A1655/A3430(A1560/A2880 is mostly recommended). The second baseline method, i.e. linking between adjacent two valleys, was better for measuring the absorbances of 1560 and 1655 cm-1 bands. The determination range of the D.D. (1%-100%) covered almost the whole range. The standard curves with A1560/A2880 and A1655/A3430 were also suitable for the determination of degree of substitution of other N-acylated chitosan, such as N-propionyl chitosan, N-butyryl chitosan and N-hexanoyl chitosan.

  6. 水葫芦叶绿素面膜膏的研制%The Preparation of Water Hyacinth Chlorophyll Facial Mask Paste

    Institute of Scientific and Technical Information of China (English)

    符斌燕; 阮燕萍

    2010-01-01

    文章利用水葫芦叶固有鲜亮绿色富含叶绿素这一特性,在最佳工艺条件下提取叶绿素来制备营养保湿面膜膏.以较简单的配方为原则,选择在面膜膏中应用较为广泛的原料进行叶绿素面膜膏的试制.通过正交实验,找出一个具有最佳面膜膏的基础配方来调配面膜膏,并对该产品的理化指标进行检测和产品使用效果进行评价.

  7. System modeling of water hyacinth life cycle in Pantanal and analysis of the use of this biomass for bio-oil and bio-fertilizer production

    OpenAIRE

    Luz Selene Buller

    2012-01-01

    Resumo: O Pantanal ocupa uma área extensa do Brasil em torno de 140.000 km²; seus ecossistemas são caracterizados por áreas com alagamento periódico, campos inundados constantemente e ambientes aquáticos naturais com lagoas (baías), rios e canais (vazantes e corixos); não existem quedas d¿ água para a geração de energia elétrica dentro da bacia. Em virtude das áreas alagadas existem poucas vias para o abastecimento de combustíveis para as fazendas produtoras que, assim, dependem fortemente de...

  8. Determination of Elemental Composition of Malabar spinach, Lettuce, Spinach, Hyacinth Bean, and Cauliflower Vegetables Using Proton Induced X-Ray Emission Technique at Savar Subdistrict in Bangladesh

    Directory of Open Access Journals (Sweden)

    S. M. Fahad

    2015-01-01

    Full Text Available The concentrations of 18 different elements (K, Ca, Fe, Cl, P, Zn, S, Mn, Ti, Cr, Rb, Co, Br, Sr, Ru, Si, Ni, and Cu were analyzed in five selected vegetables through Proton Induced X-ray Emission (PIXE technique. The objective of this study was to provide updated information on concentrations of elements in vegetables available in the local markets at Savar subdistrict in Bangladesh. These elements were found in varying concentrations in the studied vegetables. The results also indicated that P, Cl, K, Ca, Mn, Fe, and Zn were found in all vegetables. Overall, K and Ca exhibited the highest concentrations. Cu and Ni exhibited the lowest concentrations in vegetables. The necessity of these elements was also evaluated, based on the established limits of regulatory standards. The findings of this study suggest that the consumption of these vegetables is not completely free of health risks.

  9. Effects of dietary administration of water hyacinth (Eichhornia crassipes) extracts on the immune responses and disease resistance of giant freshwater prawn, Macrobrachium rosenbergii.

    Science.gov (United States)

    Chang, Chin-Chyuan; Tan, Hui-Ching; Cheng, Winton

    2013-07-01

    The hot-water extract of Eichhornia crassipes leaves (ECE) was produced and incorporated into the diet of the prawn, Macrobrachium rosenbergii, as an immunostimulant. Survival rates of prawn against Lactococcus garvieae, and its immune parameters including the total haemocyte count (THC), different haemocyte count (DHC), phenoloxidase (PO) activity, respiratory bursts (RBs), superoxide dismutase (SOD) activity, glutathione peroxidase (GPx) activity, transglutaminase (TG) activity, haemolymph coagulation time, and phagocytic activity and clearance efficiency against L. garvieae by M. rosenbergii were determined when prawn (23.0 ± 2.8 g) were fed ECE-containing diets at 0, 1.0, 2.0 and 3.0 g kg(-1). Prawn fed a diet containing ECE at 2.0 and 3.0 g kg(-1) for 12 days showed significantly increased THC, HC, GC, PO activity, RBs, SOD activity, GPx activity, and TG activity, and a significantly decreased coagulation time. The phagocytic activity and clearance efficiency against L. garvieae of prawn fed the ECE-containing diets at 1.0, 2.0, and 3.0 g kg(-1) were significantly higher than those of prawn fed the control diet at 3-12 days. Survival rates of M. rosenbergii fed the diet containing ECE at concentrations of 2 and 3 g kg(-1) were significantly higher than those fed the control diet after challenge with L. garvieae for 48-144 h. The relative percentage survival of prawn fed the 1.0, 2.0, and 3.0 g kg(-1) ECE-containing diets for 12 days were 17.5%, 39.1%, and 52.2%. It was concluded that the ECE can be used as an immunostimulant for prawn through dietary administration to enhance immune responses and resistance of M. rosenbergii against L. garvieae.

  10. Assessing and Managing the Current and Future Pest Risk from Water Hyacinth, (Eichhornia crassipes), an Invasive Aquatic Plant Threatening the Environment and Water Security

    Science.gov (United States)

    Brunel, Sarah

    2016-01-01

    Understanding and managing the biological invasion threats posed by aquatic plants under current and future climates is a growing challenge for biosecurity and land management agencies worldwide. Eichhornia crassipes is one of the world’s worst aquatic weeds. Presently, it threatens aquatic ecosystems, and hinders the management and delivery of freshwater services in both developed and developing parts of the world. A niche model was fitted using CLIMEX, to estimate the potential distribution of E. crassipes under historical and future climate scenarios. Under two future greenhouse gas emission scenarios for 2080 simulated with three Global Climate Models, the area with a favourable temperature regime appears set to shift polewards. The greatest potential for future range expansion lies in Europe. Elsewhere in the northern hemisphere temperature gradients are too steep for significant geographical range expansion under the climate scenarios explored here. In the Southern Hemisphere, the southern range boundary for E. crassipes is set to expand southwards in Argentina, Australia and New Zealand; under current climate conditions it is already able to invade the southern limits of Africa. The opportunity exists to prevent its spread into the islands of Tasmania in Australia and the South Island of New Zealand, both of which depend upon hydroelectric facilities that would be threatened by the presence of E. crassipes. In Europe, efforts to slow or stop the spread of E. crassipes will face the challenge of limited internal biosecurity capacity. The modelling technique demonstrated here is the first application of niche modelling for an aquatic weed under historical and projected future climates. It provides biosecurity agencies with a spatial tool to foresee and manage the emerging invasion threats in a manner that can be included in the international standard for pest risk assessments. It should also support more detailed local and regional management. PMID:27513336

  11. Uptake of Cd, Cu, Ni and Zn by the water hyacinth, Eichhornia crassipes (mart.) solms from pulverised fuel ash (PFA) leachates and slurries

    Energy Technology Data Exchange (ETDEWEB)

    Cordes, K.B.; Mehra, A.; Farago, M.E.; Banerjee, D.K. [University of Derby, Derby (United Kingdom). School of Environmental and Applied Science

    2000-12-01

    The main solid waste product from coal-fired power stations is pulverised fuel ash (PFA). This study investigates the uptake of Cd, Cu, Ni and Zn by the aquatic plant E-crassipes grown in leachates and slurries prepared from two different PFA samples. PFA samples were obtained from Indraprastha Power Station (IPP stn.) in New Delhi, India and the Ratcliffe-on-Soar Power Station in the UK. Results show that E. crassipes has a high accumulation capacity for Cd, Cu, Ni and Zn from leachates and slurries generated from two different PFAs and uptake of these metals is stronger in the roots than in the tops of the plant. As the metal concentrations in the growth medium increase in the 1:5 PFA:DIW ratio as compared to the 1:50 ratio, metal accumulation (as indicated by accumulation factor (AF) values) from both leachates and slurries is higher for plants grown in the 1:50 (PFA:DIW) ratios than in the 1:5 ratios. Lower metal accumulation in the plants grown in slurries than in leachates is related to the high turbidity of growth medium in slurries resulting in ash particles adhering to the root surfaces thus reducing the surface area of metal absorption. In terms of neutralisation capacity of the pH of the growth medium, Eichhornia is seen to be able to reduce the pH of all leachates. Accumulation of Cd and Zn by the plant is higher from the lower pH IPP leachates than the Ratcliffe leachates, indicating that these metals are more soluble and bioavailable in the acidic medium. Accumulation of Cu and Ni is independent of the pH of the leachates; indicating that there may be other contributory factors. 78 refs., 7 tabs.

  12. Cleaning of condensate from flue gas condensing plants at co-combustion of waste fuels. Follow-up of emissions; Rening av kondensat fraan roekgaskondenseringsanlaeggningar vid samfoerbraenning av avfallsbraenslen. Uppfoeljning av utslaepp

    Energy Technology Data Exchange (ETDEWEB)

    Sundquist, Lena; Dejfors, Charlotte; Wrangensten, Lars [AaF Energikonsult AB, Stockholm (Sweden)

    2002-03-01

    Limits of discharges in waste water at flue gas cleaning are one of the fields included in the EC-directive (2000/76/EG) regarding combustion of waste from December 28th, 2000. The pollutants included in the limits are suspended material, Hg, Cd, Tl, As, Pb, Cr, Cu, Ni, Zn as well as dioxins and furans. The limits of the directive applies generally for plants with combustion of waste, regardless of type of waste fraction, the degree of admixture or if it is a so called co-combustion plant or not. For new plants, the limits shall be fulfilled within two years after the date of the directive whereas existing plants have another three years to meet the new demands. In this project, the condensate from the flue gas has been analysed at five different combustion plants. Samples of the fuel have also been analysed as a reference at the evaluation of the results. The results from the analysed condensate have then been compared and evaluated with regards to the limit values in the EC-directive. However, one exception is dioxins and furans that are not included in this study. The analysis of the pure condensate show that at most plants the content of pollutants is below, or in some cases well below, the limits of the EC-directive. At plants with co-combustion of recovered biofuels, even the contents of pollutants in the non-purified raw condensate are below the limits of the directive. This means that plants with co-combustion of recovered wood waste and biofuels most likely will meet the requirements for emissions to waste water in the EC-directive. The water treatment process in these plants normally consists of a pH-adjustment stage followed by adding of chemicals before the condensate enters into a sand filter. The cleaned condensate from the sand filter is normally released to a recipient whereas the dirty condensate goes through a lamell separator in order to separate rest sludge. The most polluted raw condensate was found at a plant with 100 % combustion of municipal solid waste. However, the cleaning process of the condensate at this plant makes sure that the emissions to water are well below the limits. Another plant with admixture of municipal solid waste in the furnace had relatively high content of pollutants in the purified condensate. The cleaning process of the condensate at this plant is equivalent to the plants designed for co-combustion of recovered wood fuel. Therefore, the water cleaning process might have to be extended or adjusted, which already has been done at the plant after the sampling of this project, in order to meet the demands of the EG directive. At several of the visited plants, there have been problems with corrosion in the cleaning process of the condensate. Some components and materials have had to be changed and today exclusively plastic materials are used. One exception is the heat exchanger where metal is predominantly used to achieve good heat transfer.

  13. Status, remaining service-life and quality assurance of PP-materials in flue-gas applications; Status, kvarvarande livslaengd och kvalitetssaekring av PP-material i anlaeggningar foer rening och kondensering av roekgaser

    Energy Technology Data Exchange (ETDEWEB)

    Jacobson, Karin

    2011-10-15

    Background: The project is intended to provide a better understanding of how the service life of PP-materials is affected when used in flue-gas applications. It intends to form a basis for the development of relevant techniques and a methodology from which it is possible to give advice and guidance so that the quality of PP-materials can be ensured for a given desired service life. In addition it aims as being able to assess the status and remaining life of PP-materials in current components. Project outline - An inventory, contact and choice of facilities for closer cooperation. Plants with high proportions of PP in the equipment have been prioritised. - Visits to the chosen sites during shut-down periods for inspection and collection of samples from different PP details for further analysis in the laboratory. Collection of operating data and experiences of the use of PP (operating time/exposure conditions in different parts, component substitutions that have been made, etc.). - Systematic studies of the processes and mechanisms for stabiliser consumption over time. - Developing methods and methodology on which advice and guidance can be based so that the quality of PP-materials can be ensured for a given desired service life. The goal is to be able to assess the status and remaining service-life of the PP-materials in flue-gas applications. Results and Conclusions: It has been found that corrosion is relatively rare and that the main factors limiting the use and longevity of polypropylene are the thermal properties (thermal expansion and heat distortion). Leaching of stabilisers from the material is also commonly found but only a few cases of oxidative degradation, as a result of this, have been observed. An important part of the project has been to develop techniques and methodologies to assure the quality PP-material for a desired service life, and to assess the status and remaining life of the PP- materials in flue-gas applications. To do this, samples that had been exposed in the Brista and Igelsta works for an earlier Vaermeforsk Project (Materials for flue gas condensation, Stage 2, M4-303, 2004) were very useful for this. Here the OIT method, which has traditionally been the most commonly used to assess the remaining service life with respect to stabiliser concentration, was compared with FTIR and FTIR line-scan. It turned out that, especially the latter method, gives a clearer and fuller picture of the remaining amount of stabiliser than OIT. It also has the potential to be even more sensitive by further method development. However, none of the methods can provide a clear picture of the remaining life. It turned out that one material which would have been recommended to be taken out of service after only eight months in operation (according to all three techniques) survived another 3 years without detecting even the smallest decline in material properties. News value The results from the method development are interesting not only for the use of PP in flue-gas applications, but for all environments where PP is used. Further development of the line-scan FTIR technique may provide new opportunities for more correct lifetime predictions.

  14. Risøs treårsplan 1999-2001. Rullende 3-årsplan med hovedlinier for året 1999 og perspektiver for årene 2000 og 2001

    DEFF Research Database (Denmark)

    Forskningscenter Risø, Roskilde

    1999-01-01

    Denne treårsplan fastlægger rammerne for Forskningscenter Risøs virksomhed i perioden 1999-2001. Risø hører under Forskningsministeriet og driver naturvidenskabelig og teknisk-videnskabelig forskning med det formål at skabe nye udviklingsmuligheder forerhvervsliv og samfund rettet mod anvendelse ...

  15. Rene Descartes: the Dialectical Meaning of Dreamlike Life and Scientific Rationality%笛卡尔之梦幻人生与科学理性的辩证涵义

    Institute of Scientific and Technical Information of China (English)

    陈启云

    2005-01-01

    学界普遍将笛卡尔视为近代哲学关于"启蒙"、"现代"、"科学理性"思想的开启者.本文从分析笛卡尔"我思故我在"及"心物二元论"等观点出发,结合促进笛卡尔理论产生的"三个梦境",揭示出笛卡尔思想中的"人本主义"、"后现代主义"思想根源.

  16. Concepción emergente del rol y comportamiento de las organizaciones empresariales en el contexto de la sostenibilidad a partir de los principios del desarrollo sostenible y los aportes epistemológicos de Renee Bedard

    OpenAIRE

    Muñoz Ospina, José Fernando

    2010-01-01

    Tesis (Maestría en Desarrollo Sostenible y Medio Ambiente). Universidad de Manizales. Facultad de Ciencias Contables, Económicas y Administrativas, 2010 El concepto de Desarrollo Sostenible se muestra como el resultado del proceso histórico de conciencia, comprensión, asimilación y respuesta, a las conductas inadecuadas de los seres humanos y sus organizaciones en el camino recorrido hacia la búsqueda del bienestar y el progreso social. De esta manera, la sostenibilidad implica...

  17. The School of Veterinary Medicine in St-Hyacinthe : energy efficiency and air quality, an inherent part of the new facility; Le CHUV de St-Hyacinthe : l'efficacite energetique et qualite de l'air, partie inherente des nouvelles installations

    Energy Technology Data Exchange (ETDEWEB)

    Havard, R. [SNC Lavalin, Montreal, PQ (Canada)

    2010-09-15

    This article described the expansion and modernization of the Centre Hospitalier Universitaire Veterinaire (CHUV) at the University of Montreal. The $74 million retrofit project at the School of Veterinary Medicine began in 2001 and was completed in 2008. The facility is considered to be a forerunner in the agribusiness. The facility can accommodate over 400 students at 3 different types of hospitals for pets, birds of prey, exotic animals, farm animals and equidae. Many challenges were addressed, including indoor air quality which requires specialized control for air temperature, humidity, and rigorous control of the dispersion of contaminants to ensure safety in each space. In addition to reliability, the infrastructure plan had to ensure exemplary energy performance and a reduction in costs. The energy system relies on a combination of electricity, natural gas and heat pumps for heating and cooling the premises. A novel ventilation system was designed to keep the operating rooms free of contaminants and to block contaminants from adjoining rooms. Contagious rooms requiring isolation are kept in slightly negative pressure, and air from these rooms is vented to the outside. It was concluded that the newly modernized facility meets the stringent conditions for thermal comfort in an energy efficiency manner. 3 figs.

  18. U.S. Low-Intensity Conflicts 1899-1990

    Science.gov (United States)

    1990-09-10

    refinements. The product will be most useful if it encourages further in-depth research. LIC DEFINED AND DESCRD3ED French philosopher Rene Descartes was...French View of Counterinsurgency, N.Y., Praeger, 1961, 115 p. -9- of some insurgents. Transnational terrorism, instigated by groups that rene - gade...Chile. Army Commander-in-Chief Rene Schneider, a strict constitutionalist who abhorred military coups, was mortally wounded when he resisted abduction

  19. Time Perception and Evoked Potentials

    Science.gov (United States)

    1988-07-01

    ARI Research Note 88-69 0 MitnS.Ktohe U.0 ... Ann-r (. Time Perception and Evoked Potentials Paul FraisseDT ( Lfniversit6 Rene Descartes E LECTE...JOHNSON 00L, [N Technical Dicctojr Cmad Research accomplished under contract for the Department of the Army C. Universite Rene Descartes , Paris )r...ORGANIZATION NAME AND ADDRESS 10. PROGRAM ELEMENT. PROJECT. TASK Labrato-ire de Psychologie Experimental AREA• WORK UNIT NUMBERS Universite Rene Descartes

  20. Defining Stability, Security, Transition, and Reconstruction (SSTR) Operations Requirements for Future Department of the Navy Training and Analytical Models and Simulations

    Science.gov (United States)

    2008-09-01

    event 193 Rene Descartes (1960). Discourse on Method and Meditations. New York: The Liberal Arts Press...of State’s country website for Burma. Retrieved from http://www.state.gov/p/eap/ci/bm/. Descartes , Rene ; Laurence J. Lafleur (trans.) (1960...objects which in their own nature do not stand in a relation of antecedence and sequence. -- Rene Descartes193 A. INTRODUCTION Implementation of

  1. 77 FR 74013 - Granting of Request for Early Termination of the Waiting Period Under the Premerger Notification...

    Science.gov (United States)

    2012-12-12

    ... Inc.; Ecolab Inc.; Zep Inc. 20130132 G Empeiria Acquisition Corporation; Stephen D. Cope; Empeiria... CONTACT: Renee Chapman, Contact Representative, or Theresa Kingsberry, Legal Assistant, Federal Trade...

  2. Poetic approach to referendum agitation / Aleksei Gunter

    Index Scriptorium Estoniae

    Gunter, Aleksei, 1979-

    2003-01-01

    Euroopa Liiduga ühinemise toetuseks korraldatud kampaaniatest: Eurobussi tuurist, Rene Vilbre loodud reklaamklippidest televisioonis ning peaminister Juhan Partsi kohtumisest europooldajate ja -vastastega

  3. Ostame maja! / Kersti Pikk, Aet Piel, Piret Tali

    Index Scriptorium Estoniae

    Pikk, Kersti

    2007-01-01

    Võrreldakse kolme eramut - Pirital, Viimsis (Arhitektuuriagentuur OÜ - arhitektid Inga Raukas, Toomas Tammis, Karli Luik ja Renee Puusepp) ja Harku vallas Vatslas. Lk. Oberhausi kinnisvaraspetsialisti Ene Arro kommentaar

  4. "Puuduvate ajalugude" kirjutamisest / Katrin Kivimaa

    Index Scriptorium Estoniae

    Kivimaa, Katrin, 1969-

    2008-01-01

    Arvustus: Baigell, Renee. Baigell, Matthew. Peeling potatoes, painting pictures : women artists in post-Soviet Russia, Estonia, and Latvia : the first decade. New Brunswick : Rutgers University Press, 2001

  5. Ostame maja! / Kersti Pikk, Aet Piel, Piret Tali

    Index Scriptorium Estoniae

    Pikk, Kersti

    2007-01-01

    Võrreldakse kolme eramut - Pirital, Viimsis (Arhitektuuriagentuur OÜ - arhitektid Inga Raukas, Toomas Tammis, Karli Luik ja Renee Puusepp) ja Harku vallas Vatslas. Lk. Oberhausi kinnisvaraspetsialisti Ene Arro kommentaar

  6. "Puuduvate ajalugude" kirjutamisest / Katrin Kivimaa

    Index Scriptorium Estoniae

    Kivimaa, Katrin, 1969-

    2008-01-01

    Arvustus: Baigell, Renee. Baigell, Matthew. Peeling potatoes, painting pictures : women artists in post-Soviet Russia, Estonia, and Latvia : the first decade. New Brunswick : Rutgers University Press, 2001

  7. The Use of Aquatic Plants in Wastewater Treatment: A Literature Review.

    Science.gov (United States)

    1992-12-01

    1 W ater Hyacinth ........................................................................... 11 2-2 W ater Lettuce ...new stolons being extended from the parent plant may remain at the surface and grow hydroponically . Continued growth of the first free-floating...Water Lettuce Water lettuce , Pistia stratiotes L. is a plant similar in size to the water hyacinth and requires many of the same conditions for

  8. Levulinic acid from lignocellulosic biomass

    NARCIS (Netherlands)

    Girisuta, Buana

    2007-01-01

    The primary objective of this thesis is to define optimum catalysts, reaction conditions and reactor configurations for the conversion of water hyacinth plant to LA. The conversion of the C6-sugars present in the water hyacinth plant to LA involves several reactions that together form a complex reac

  9. 75 FR 23221 - Availability of an Environmental Assessment and Finding of No Significant Impact for a Biological...

    Science.gov (United States)

    2010-05-03

    ... Significant Impact for a Biological Control Agent for Water Hyacinth AGENCY: Animal and Plant Health... for use as a biological control agent to reduce the severity of water hyacinth infestations. Based on... the continental United States for use as a biological control agent to reduce the severity of...

  10. Rescue of photoperiod/freeze-sensitive and low seed producing accessions of Lablab purpureus using hydroponic cloning and aeroponics.

    Science.gov (United States)

    Hyacinth bean, Lablab purpureus is a legume used as a vegetable and the USDA, ARS, PGRCU conserves 137 hyacinth bean accessions from countries worldwide. Many accessions in this collection are photoperiod and freeze-sensitive due to their flower and seed production during November through March in t...

  11. PENGARUH FRAKSI NONPROTEIN KACANG KOMAK (Lablab purpureus (L. Sweet TERHADAP KADAR GLUKOSA DARAH DAN MALONALDEHIDA TIKUS DIABETES [Effect of Nonprotein Fraction of Hyacinth Bean (Lablab purpureus (L. Sweet Diet on Glucose and Malonaldehyde Serum of Diabetic Rats

    Directory of Open Access Journals (Sweden)

    Erma Rohmawati

    2010-06-01

    Full Text Available The hypoglycemic response to Lablab nonprotein fraction (NPK was evaluated in alloxan-induced diabetic rats. The objectives of this research were to evaluate the effect of Lablab nonprotein fraction diet on the blood glucose concentration and the lipid peroxide level of alloxan-induced diabetic rats. Two months old male Sprague Dawley rats were divided into 4 groups, each group contained of 5 rats. Three groups were diabetic rats induced by alloxan injection (110 mg/kg of body weight by intra-pheritonial injection while one group was a control,normal rat. The experiment groups were (1 normal (group I, (2 diabetic (group II, (3 diabetic+cholesteol 0.5% (control group, group III, and (4 diabetic+cholesterol 0.5% + lablab NPK (group IV. The concentration of rat’s blood glucose were periodically measured during diet intervenion (day 0,14,27, and 42. The Lipid peroxide was evaluated as the concentration of malonaldehyde (MDA both in serum and liver of the rats by Thiobarbituric Acid Reactivity Test methode. The result demonstrated that after 42 days of intervention, the Lablab nonprotein diet decreased the blood glucose concentrations from 444.00 + 143.00 mg/dl to 310.50 +111.40 mg/dl (30%, while control group has decreased the blood glucose concentration from 458.00 +164.99 mg/dl to 455.33 + 81.95 mg/dl (0.6%. Lablab nonprotein diet significantly (P<0.05 reduced the concentration of blood glucose as compared to the control group. However, Lablab nonprotein fraction diet did not give a significant diferrence on the level of serum MDA and liver MDA as compared to the control group.

  12. Mini-cogeneration in the flower bulb industry. Use of cogeneration in the cultivation and hot bed of tulip and hyacinth; Mini-wkk in de bloembollensector. Toepassing van wkk bij teelt en broei van tulp en hyacint

    Energy Technology Data Exchange (ETDEWEB)

    De Visser, I.; Koolwijk, E. [Cogen Projects, Driebergen-Rijsenburg (Netherlands)

    2008-06-15

    This study shows that by deploying cogeneration, energy savings can be realized in the flower bulb industry. Use of cogeneration at medium-sized to large flower bulb companies is interesting from the viewpoint of finance. [Dutch] Uit de studie blijkt dat met de toepassing van WKK energiebesparing gerealiseerd kan worden in de bollensector. Op de middelgrote tot grote bollenbedrijven is de toepassing van WKK uit financieel oogpunt interessant.

  13. Investigation into the Use of Dried Water Hyacinth as a Seed Germination Medium%水葫芦制作温室栽培苗钵的可行性研究

    Institute of Scientific and Technical Information of China (English)

    沈明卫; 郝飞麟

    2006-01-01

    水葫芦的低成本、资源化、生态合理利用是水葫芦防治的发展趋势,可降解温室栽培苗钵的制作使用可简化移苗过程.基于以上考虑,对水葫芦制作温室栽培专用有机苗钵的可行性、对水葫芦制作育苗钵的方法,所需有机生态胶粘剂的制作和性能特点,苗钵对樱桃番茄的栽培效果影响进行了研究.结果发现,对水葫芦进行干燥切割后,辅以胶粘剂能制作所要求的育苗钵;采用以淀粉为基体制作的有机胶粘剂粘结并压制成形的苗钵在耐湿性方面有待于进一步提高;在栽培过程中以水葫芦为原材料制作的育苗钵对樱桃番茄苗生长的影响作用并不明显.

  14. Effect of Temperature,Inoculums and Trace Metals on Methane Production from Water Hyacinth%温度、接种量及微量元素对水葫芦产甲烷的影响

    Institute of Scientific and Technical Information of China (English)

    叶小梅; 周立祥; 常志州; 杜静; 徐跃定; 张建英

    2010-01-01

    在实验室进行了不同接种量(接种物VS与水葫芦VS比例分别为0, 0.5, 1, 2)、不同发酵温度(35℃,55℃)以及微量元素Fe2+, Co2+, Ni2+对水葫芦厌氧发酵的影响,结果表明,加大接种量有利于提高水葫芦厌氧发酵的启动与产气率,综合产气量、原料降解率,以接种比例1较适宜.55℃高温厌氧发酵有利于加快厌氧发酵进程,缩短发酵周期,但总产气量及原料降解率与35℃无区别.添加适量的微量元素可以提高前7天总产气量,三种微量元素对水葫芦厌氧发酵的影响力为Fe2+>Co2+>Ni2+.

  15. 介入性白及凝胶经气道治疗支气管结核的实验研究%The Experimental Study on Treating Bronchial Tuberculoses by Transluminal Hyacinth Bletilla Gel through Air Passage

    Institute of Scientific and Technical Information of China (English)

    孙昕; 范勇; 刘钢; 梁春宝; 韩炳森; 尹保全

    2002-01-01

    目的:探讨建立介入性白及凝胶经气道治疗支气管结核的方法.方法:进行耐药结核菌株体外抑菌实验;介入性白及凝胶配制实验;应用实验犬对该凝胶进行靶支气管灌注、皮下埋藏及口服与支气管灌注药代动力学实验.结果:提高药物浓度可抑制耐药结核菌株生长;得到白及为载体的凝胶剂的配方,建立支气管灌注方法学;药代显示:作用时间达60小时以上,优于口服给药.结论:将纤支镜与介入技术、中药白及与抗痨药物相结合,在病变的气管、支气管内缓慢释放高浓度抗痨药物,以达到治疗目的.

  16. Effect of purple root water hyacinth (Eichhornia crassipes) on purification of water containing heavy metals%紫根水葫芦对重金属水体的净化作用

    Institute of Scientific and Technical Information of China (English)

    陈文萍; 徐舒阳; 那中元; 杨红军; 黄柏炎; 王莹

    2016-01-01

    为了探讨紫根水葫芦对污水中重金属(镉、锌、铅)的净化效果,比较了普通水葫芦和紫根水葫芦的生物过滤能力和积累情况.实验结果显示,2种水葫芦均能显著降低3种重金属的含量,被吸收的重金属会在植物体内得到积累,且主要富集于根部,而不是茎叶部.此外,被吸收的重金属绝大多数不会重新释放到水体中.紫根水葫芦对重金属的净化效果优于普通水葫芦.因此,紫根水葫芦具有良好的水体修复和去除重金属的潜力.

  17. Chaque chose est une prison / Jaan J. Leppik

    Index Scriptorium Estoniae

    Leppik, Jaan J.

    2007-01-01

    Rahvusvahelises ühistöös valminud tantsufilm "Teine" ("Another") : režissöör Rene Vilbre : stsenaristid Rene Vilbre, Teet Kask, Helena Jonsdottir : produtsent Heidi Pruuli : koreograaf ja peaoaline Helena Jonsdottir : osatäitjad Mait Malmsten, Ruslan Stepanov : Eesti - Island - Saksamaa - Soome - Sloveenia, 2005

  18. Krooni viimane hingetõmme näitusesaalis

    Index Scriptorium Estoniae

    2011-01-01

    Kunstimagistrite Maiu Kurvitsa ja Rene Haljasmäe näituseprojektist "Kroonijuveelid" Tallinna Ülemiste City restoranis Cityplatz, kust see liigub edasi üle Eesti. Näitusel on Eesti kroonid Rene Haljasmäe poolt köidetud raamatuteks, Maiu Kurvitsa portreefotod koondavad Eesti krooni saamise ja olemisega seotud võtmepersoone

  19. В Нарве можно будет посмотреть удостоенный эстонской театральной премии спектакль / Рене Ныммик ; интервьюировала Тийа Линнард

    Index Scriptorium Estoniae

    Ныммик, Рене

    2015-01-01

    Narva kultuurimajas Rugodiv näeb Fine5 tantsuteatri lavastust "...and blue", mis võitis tänavu Eesti teatriauhinna. Etenduse koreograafideks ja lavastajateks on Tiina Ollesk ja Rene Nõmmik, keda on palutud lavastama ka Venemaale. Intervjuu Rene Nõmmikuga

  20. Topics of Evolutionary Computation 2001

    DEFF Research Database (Denmark)

    Ursem, Rasmus Kjær

    This booklet contains the student reports from the course: Topics of Evolutionary Computation, Fall 2001, given by Thiemo Krink, Rene Thomsen and Rasmus K. Ursem......This booklet contains the student reports from the course: Topics of Evolutionary Computation, Fall 2001, given by Thiemo Krink, Rene Thomsen and Rasmus K. Ursem...

  1. Tantsufilm "Teine" ETV-s

    Index Scriptorium Estoniae

    2005-01-01

    Täna on ETV-s rahvusvahelises ühistöös valminud tantsufilm "Teine" ("Another") : režissöör Rene Vilbre : stsenaristid Rene Vilbre, Teet Kask, Helena Jonsdottir : produtsent Heidi Pruuli : koreograaf ja peaoaline Helena Jonsdottir : osatäitjad Mait Malmsten, Ruslan Stepanov. Filmi võtted toimusid Tartu vanglas

  2. Sõpruses esilinastub Eesti-Islandi tantsufilm

    Index Scriptorium Estoniae

    2005-01-01

    10. novembril esilinastub rahvusvahelises ühistöös valminud tantsufilm "Teine" ("Another") : režissöör Rene Vilbre : stsenaristid Rene Vilbre, Teet Kask, Helena Jonsdottir : produtsent Heidi Pruuli : koreograaf ja peaoaline Helena Jonsdottir : osatäitjad Mait Malmsten, Ruslan Stepanov. Filmi võtted toimusid Tartu vanglas

  3. Rohkem kui lihtsalt tantsufilm / Tiit Tuumalu

    Index Scriptorium Estoniae

    Tuumalu, Tiit, 1971-

    2005-01-01

    Rahvusvahelises ühistöös valminud tantsufilm "Teine" ("Another") : režissöör Rene Vilbre : stsenaristid Rene Vilbre, Teet Kask, Helena Jonsdottir : produtsent Heidi Pruuli : koreograaf ja peaoaline Helena Jonsdottir : osatäitjad Mait Malmsten, Ruslan Stepanov : Eesti - Island 2005

  4. Võtme ja riiviga tantsufilm / Kristiina Garancis

    Index Scriptorium Estoniae

    Garancis, Kristiina, 1969-

    2005-01-01

    Rahvusvahelises ühistöös valminud tantsufilm "Teine" ("Another") : režissöör Rene Vilbre : stsenaristid Rene Vilbre, Teet Kask, Helena Jonsdottir : produtsent Heidi Pruuli : koreograaf ja peaoaline Helena Jonsdottir : osatäitjad Mait Malmsten, Ruslan Stepanov : Eesti - Island 2005

  5. В Нарве можно будет посмотреть удостоенный эстонской театральной премии спектакль / Рене Ныммик ; интервьюировала Тийа Линнард

    Index Scriptorium Estoniae

    Ныммик, Рене

    2015-01-01

    Narva kultuurimajas Rugodiv näeb Fine5 tantsuteatri lavastust "...and blue", mis võitis tänavu Eesti teatriauhinna. Etenduse koreograafideks ja lavastajateks on Tiina Ollesk ja Rene Nõmmik, keda on palutud lavastama ka Venemaale. Intervjuu Rene Nõmmikuga

  6. Teaching Military Ethics as a Science 2

    Science.gov (United States)

    1989-03-01

    Both Rene Descartes (1596-1650) and Gottfried Leibniz (1646-1716), the inventor of differential calculus, attempted to found a science of ethics on...produce a science of ethics nor because the method of science is incomatible with ethics. Both Rene Descartes (1596-1650) and Gottfried’Leibniz (1646

  7. Procedures for Separations within Batches of Values, 1. The Orderly Tool Kit and Some Heuristics

    Science.gov (United States)

    1989-03-01

    separations within batches of values, I. The orderly tool kit and some heuristics by Thu Hoang* and John W. Tukey** *Universite Rene Descartes ...separations with batches of values, . The orderly tool kit and heuristics Thu Hoang* and John W. Tukey** *Universite Rene Descartes Laboratoire de

  8. Igor Gräzin predlagajet suditsja s glavoi PASE

    Index Scriptorium Estoniae

    2007-01-01

    Riigikogu liige Igor Gräzin arvab, et Eesti võiks kaaluda võimalust anda kohtusse ENPA president Rene van der Linden, kes on laimanud Eesti riiki. Riigikogu esimehe Ene Ergma kirjast ENPA presidendile Rene van Lindenile ja tema vastusest

  9. Imeilus Fine 5

    Index Scriptorium Estoniae

    2017-01-01

    Vaba Lava teatrikeskuse laval esineb Fine 5 oma lavastusega "Imeilus". Tiina Ollesk ja Renee Nõmmik, tantsulavastuse autorid on koreograafid, õppejõud, lavastajad ja kogemustega tantsijad. 29. jaanuaril korraldavad Tiina Ollesk ja Renee Nõmmik Tallinna Ülikoolis kaasaegse liikumismõtlemise töötoa, mis on pühendatud lavastusele "Imeilus"

  10. Õpetajad kaunistavad Viljandit värviliste freskomaalidega / Liisi Seil

    Index Scriptorium Estoniae

    Seil, Liisi, 1971-

    2007-01-01

    Kunstiõpetajate suveseminar Viljandis lõppes freskomaali loengu ja töötoaga. Kunstiõpetajad kaunistasid kultuurimaja hoovi halli müüri ornamentidega. Freskomaali võtteid tutvustas Renee Aua. Kommenteerivad üks seminari korraldajaid Kaja Lepla ja Renee Aua

  11. Krooni viimane hingetõmme näitusesaalis

    Index Scriptorium Estoniae

    2011-01-01

    Kunstimagistrite Maiu Kurvitsa ja Rene Haljasmäe näituseprojektist "Kroonijuveelid" Tallinna Ülemiste City restoranis Cityplatz, kust see liigub edasi üle Eesti. Näitusel on Eesti kroonid Rene Haljasmäe poolt köidetud raamatuteks, Maiu Kurvitsa portreefotod koondavad Eesti krooni saamise ja olemisega seotud võtmepersoone

  12. Võtme ja riiviga tantsufilm / Kristiina Garancis

    Index Scriptorium Estoniae

    Garancis, Kristiina, 1969-

    2005-01-01

    Rahvusvahelises ühistöös valminud tantsufilm "Teine" ("Another") : režissöör Rene Vilbre : stsenaristid Rene Vilbre, Teet Kask, Helena Jonsdottir : produtsent Heidi Pruuli : koreograaf ja peaoaline Helena Jonsdottir : osatäitjad Mait Malmsten, Ruslan Stepanov : Eesti - Island 2005

  13. Rohkem kui lihtsalt tantsufilm / Tiit Tuumalu

    Index Scriptorium Estoniae

    Tuumalu, Tiit, 1971-

    2005-01-01

    Rahvusvahelises ühistöös valminud tantsufilm "Teine" ("Another") : režissöör Rene Vilbre : stsenaristid Rene Vilbre, Teet Kask, Helena Jonsdottir : produtsent Heidi Pruuli : koreograaf ja peaoaline Helena Jonsdottir : osatäitjad Mait Malmsten, Ruslan Stepanov : Eesti - Island 2005

  14. Tantsufilm "Teine" ETV-s

    Index Scriptorium Estoniae

    2005-01-01

    Täna on ETV-s rahvusvahelises ühistöös valminud tantsufilm "Teine" ("Another") : režissöör Rene Vilbre : stsenaristid Rene Vilbre, Teet Kask, Helena Jonsdottir : produtsent Heidi Pruuli : koreograaf ja peaoaline Helena Jonsdottir : osatäitjad Mait Malmsten, Ruslan Stepanov. Filmi võtted toimusid Tartu vanglas

  15. Chaque chose est une prison / Jaan J. Leppik

    Index Scriptorium Estoniae

    Leppik, Jaan J.

    2007-01-01

    Rahvusvahelises ühistöös valminud tantsufilm "Teine" ("Another") : režissöör Rene Vilbre : stsenaristid Rene Vilbre, Teet Kask, Helena Jonsdottir : produtsent Heidi Pruuli : koreograaf ja peaoaline Helena Jonsdottir : osatäitjad Mait Malmsten, Ruslan Stepanov : Eesti - Island - Saksamaa - Soome - Sloveenia, 2005

  16. Sõpruses esilinastub Eesti-Islandi tantsufilm

    Index Scriptorium Estoniae

    2005-01-01

    10. novembril esilinastub rahvusvahelises ühistöös valminud tantsufilm "Teine" ("Another") : režissöör Rene Vilbre : stsenaristid Rene Vilbre, Teet Kask, Helena Jonsdottir : produtsent Heidi Pruuli : koreograaf ja peaoaline Helena Jonsdottir : osatäitjad Mait Malmsten, Ruslan Stepanov. Filmi võtted toimusid Tartu vanglas

  17. Towards Deriving Renewable Energy from Aquatic Macrophytes Polluting Water Bodies in Niger Delta Region of Nigeria

    Directory of Open Access Journals (Sweden)

    Badmus Abdurrahman Adeleye

    2013-01-01

    Full Text Available This study was performed to derive methane rich biogas from biomass of harvested water hyacinth polluting water bodies in selected rivers of the Niger delta region of Nigeria. Field visits were undertaken on selected rivers in the Niger Delta region in which aquatic macrophytes were collected and inventorized. Also different types of aquatic macrophytes were surveyed. Control by harvesting macrophytes and deriving energy (methane-rich biogas from biomass of one (water hyacinth was successfully carried out in this study. An initial test was conducted to evaluate methane rich biogas production from water hyacinth collected from the wild. After a successful production of combustible biogas, laboratory experiments aimed at generating biogas from harvested biomass of aquatic mycrophyte (water hyacinth cultivated under eutrophic and oligotrophic conditions were undertaken in the laboratory. The result of the study showed highest biogas yield of 22 L over a 40 day retention time for water hyacinth raised under eutrophic conditions. Biogas yield for water hyacinth raised under oligotrophic conditions recorded the highest yield of 53L over an 11 day retention time. The conversion of the biomass of harvested aquatic macrophyte (water hyacinth from the Niger Delta into renewable energy, that is combustible biogas, demonstrated an inevitable option for the control and management of environmental pollution associated with aquatic macrophytes and their usability for poverty alleviation in the Niger Delta region of Nigeria.

  18. Comments on "Changing attitudes towards the care of children in hospital: a new assessment of the influence of the work of Bowlby and Robertson in the UK, 1940-1970" by Frank C.P. van der Horst and Rene van der Veer (Attachment & Human Development Vol 11, No 2, March 2009, 119-142).

    Science.gov (United States)

    Robertson, Joyce; McGilly, Katherine

    2009-11-01

    The importance of James Robertson's work in changing the hospital conditions for young children is widely acknowledged but disputed by van der Horst and van der Veer (2009), although they presented evidence supporting his influence, they also presented considerable evidence showing that others were ignored, including writers in The Lancet and the British Medical Journal. van der Horst and van der Veer presented a muddled picture by failing to understand how the work of James Robertson influenced a wide range of people, opened up the debate and, through the Platt Report, gave parents the authority and confidence to challenge hospitals and stay with their young children. James Robertson's 1952 film "a Two-year-old Goes to Hospital" provided the 'visual communication to pierce defences as the spoken word cannot do'. This film continues to be widely used today in teaching about young children.

  19. Comments on the article "Changing attitudes towards the care of children in hospital: a new assessment of the influence of the work of Bowlby and Robertson in the UK, 1940-1970" by Frank C.P. van der Horst and Rene van der Veer (Attachment and Human Development Vol 11, No 2, March 2009, 119-142).

    Science.gov (United States)

    Lindsay, Mary

    2009-11-01

    The authors give an impressive list of references, but these do not reflect the situation in the UK; most of those looking after children in hospital did not write about what they did or read about what others did. Children in hospital saw little or nothing of their parents, and once they had 'settled' the doctors and nurses were unaware of their distress. John Bowlby's interest in maternal deprivation led him to appoint James Robertson as his research assistant, to observe responses of young children to loss of maternal care on admission to hospital. They formulated the theoretical framework of the three stages through which the children went; protest, despair, and detachment constituting a developmental interference. Robertson was so concerned when nobody would listen that in 1952 he made the film 'A Two Year Old Goes to Hospital', which upset children's doctors and nurses. It also probably contributed to the government setting up in 1957 a Committee chaired by Sir Harry Platt to consider the Welfare of Children in Hospital. 'Going to Hospital with Mother' was made by Robertson in 1958. With Dermod MacCarthy he showed the films to the Committee, who accepted the suggestions in Robertson's Memorandum which included unrestricted visiting and mothers being admitted with their young children. The Report, known as the Platt Report, was published in 1959. Robertson could then show his films publicly, campaign in the media and encourage the pressure group NAWCH (the National Association for the Welfare of Children in Hospital) who were successful in getting many of the Committee's recommendations implemented, to the benefit of all children in hospital.

  20. Gas-turbine HTGR materials screening test program. Quarterly progress report, July 1, 1976--September 30, 1976. [IN 100; IN 713; MM004; M21; IN 738; RENE 100; MoTZM; Hastelloy X; Inconel 617; MA 753; IN 519, Inconel 706; Inconel 718; A286; 316 SS; Incoloy 800

    Energy Technology Data Exchange (ETDEWEB)

    Rosenwasser, S.N.; Johnson, W.R.

    1976-09-30

    The duration of controlled-impurity creep-screening tests and unstressed aging tests has reached 10,000 hr. Creep and weight change data from testing up to 9,000 hr and results from post-test metallurgical evaluations of several recently returned 3,000-hr specimens, including alloys IN519 and MoTZM, are presented. Preliminary materials requirements for key GT-HTGR 850/sup 0/C (1562/sup 0/F) reactor outlet temperature reference design components are documented.

  1. Okefenokee National Wildlife Refuge Biological Report

    Data.gov (United States)

    US Fish and Wildlife Service, Department of the Interior — Annual summary of wildlife population assessments (inlcuding wading birds, waterfowl, big game mammals, and alligators), weed control (water hyacinth and water...

  2. 419-IJBCS-Article-Okunowo wahad

    African Journals Online (AJOL)

    DR GATSING

    Phytoremediation potential of some heavy metals by water hyacinth ..... from untreated waste water to the ecosystem. Future study will examine the ... phytoremediate polycyclic aromatic hydrocarbon which is a major toxicant resulting from oil ...

  3. Dredging Operations Technical Support Program. Long-Term Monitoring of Eleven Corps of Engineers Habitat Development Field Sites Built of Dredged Material, 1974-1987

    Science.gov (United States)

    1989-12-01

    Phraginites australis Common spikerush Eleocharis palus tris Common velvetgrass Holcus lanatus Coontail Ceratophyliwn sp. Cowpea Vigna sp. Crabgrass Diqitaria...monnieri Water hyacinth Eichhornia crassipes Watermelon Citrullus vulgaris Water parsnip Sium sauve Water pennywort Hydrocoty is bonariensis Water plantain

  4. Impact of invasive aquatic macrophytes on the population and behavioral ecology of mosquitoes (Diptera: Culicidae)

    Science.gov (United States)

    A field survey, three outdoor cage enclosure experiments, and laboratory studies were conducted to elucidate the impact of the invasive aquatic weeds Eichhornia crassipes (floating water hyacinth), Ludwigia hexapetala (emergent water yellow-primrose), and Egeria densa (submersed Brazilian waterweed)...

  5. SIZE AND INCUBATION PERIOD '

    African Journals Online (AJOL)

    Department of Chemical and Process Engineering,. University of Dar es Salaam, ... incubation time on biogas production from water hyacinth. Substrate ..... This was attributed to high lignin content in the ..... and steam explosion. Biotechnol ...

  6. Associated Fauna to Eichhornia crassipes in a Constructed Wetland for Aquaculture Effluent Treatment

    National Research Council Canada - National Science Library

    Lúcia Helena Sipaúba-Tavares; Bruno Scardoelli Truzzi; Ana Milstein; Aline Marcari Marques

    2017-01-01

    Water, sediment and associated fauna were studied in a water hyacinth ( ) stand of a constructed wetland, used for aquaculture effluent treatment in SE Brazil, in February-April (summer/rainy season...

  7. Water

    Directory of Open Access Journals (Sweden)

    E. Sanmuga Priya

    2017-05-01

    Full Text Available Phytoremediation through aquatic macrophytes treatment system (AMATS for the removal of pollutants and contaminants from various natural sources is a well established environmental protection technique. Water hyacinth (Eichhornia crassipes, a worst invasive aquatic weed has been utilised for various research activities over the last few decades. The biosorption capacity of the water hyacinth in minimising various contaminants present in the industrial wastewater is well studied. The present review quotes the literatures related to the biosorption capacity of the water hyacinth in reducing the concentration of dyestuffs, heavy metals and minimising certain other physiochemical parameters like TSS (total suspended solids, TDS (total dissolved solids, COD (chemical oxygen demand and BOD (biological oxygen demand in textile wastewater. Sorption kinetics through various models, factors influencing the biosorption capacity, and role of physical and chemical modifications in the water hyacinth are also discussed.

  8. Genetic resources in the USDA, ARS, PGRCU legume crop germplasm collections with phyto-pharmaceutical uses

    Science.gov (United States)

    Seventeen health functional legumes including butterfly pea (Clitoria ternatea L.), Indigofera cassioides Rottler ex DC., I. linnaei Ali, I. suffruticosa Mill., hyacinth bean [Lablab purpureus (L.) Sweet], velvetbean [Mucuna pruriens (L.) DC], jicama [Pachyrhizus erosus (L.) Urb.], winged bean [Psop...

  9. Page 1 Tropical Freshwater Biology, 8 (1999) 31- 40 31 ...

    African Journals Online (AJOL)

    samples was collected for analysis. The range of water ... multiple factor dependent. ... Estuarine communities of coastal rivers and lagoons have lately been attracting ..... hyacinth (Eichhornia crassipes) on the physico-chemical environment of.

  10. 378-IJBCS-Article-Kouamé Kouamé Victor

    African Journals Online (AJOL)

    User

    Physico-chemical factors involved in rivers and lagoons invasion by water hyacinth ... The invasion of freshwaters and coastal ecosystems by Eichhornia crassipes in tropical and subtropical .... samples for nutrient analyses were collected.

  11. Low Cycle Fatigue Behavior of Conventionally Cast MAR-M 200 at 1000 C.

    Science.gov (United States)

    1984-09-01

    propagation, as illustrated in figures 5 and 6. Gell and Leverant (ref. 1), McMahon and Coffin (ref. 7), Coffin (ref. 8), and Antolovich , Liu and Baur (ref...propagation in Rene’ 80 was primarily transgranular, independent of cyclic loading frequency. Antolovich et. al. reported crack initiation in Rene’ 80 at...on the Cyclic Strain and Fatigue Behavior of Cast Rene’ at 16000 F. Metall. Trans., vol. 5, 1974, no. 5, May pp 1053-1060. 9. Antolovich , Stephen 0

  12. A Conference on Eye Movements and Visual Cognition Held in Amherst, Massachusetts on 16-18 August 1990.

    Science.gov (United States)

    1991-03-04

    McConkie, University of Illinois Sara Sereno, University of Massachusetts Robin Morris, U of South Carolina Kevin O’Regan, U Rene Descartes Albrecht...Inhoff 10:20 - 10:40 Morning Break 10:40 - 11:10 Rene Schmauder SESSION 5: Reading and Pictures 11:10 - 11:40 Samuel Giveen 11:50 - 12:20 Alan Kennedy 12...Inhoff, SUNY, Binghamton Discussant: Rene Schmauder, U of Massachusetts Vision and Cognition in Reading: The Meeting Point George W. McConkie and Paul

  13. Maailma kuulsaim krokodill sai 75 aastaseks / Anu Merila

    Index Scriptorium Estoniae

    Merila, Anu

    2008-01-01

    Lacoste'i sportlikke rõivaid ja aksessuaare tootvast kaubamärgist, asutaja Rene Lacoste. Firma loominguliseks direktoriks on prantsuse moekunstnik Christophe Lemaire. Küsimustele vastab Philippe Lacoste

  14. Eesti kooriteose esiettekanne lätlastelt / Kersti Inno

    Index Scriptorium Estoniae

    Inno, Kersti, 1954-

    2003-01-01

    Ansambli LRC Chamber Singers kontsertidest Pärnu kontserdimaja kammersaalis 17. okt., Vanemuise kontserdimajas 18. okt., Rotermanni soolalaos 19. okt. Esiettekande tuleb NYYD 03 tellimusel valminud Rene Eespere ladinakeelne teos koorile ja vibrafonile "Armastaja sõnad"

  15. "See õpilasmalev on ikka täitsa tume maa" / Jaanus Kulli

    Index Scriptorium Estoniae

    Kulli, Jaanus, 1955-

    2003-01-01

    Stsenaristide-režissööride Jaak Kilmi ja Rene Reinumägi poolt läbiviidud castingutest filmi "Sigade revolutsioon" peaosaliste leidmiseks, valiti välja õpilased Uku Uusberg, Lilian Alto ja Jass Seljamaa

  16. Vene press üritab fakte laimuga ümber lükata / Ingvar Bärenklau

    Index Scriptorium Estoniae

    Bärenklau, Ingvar, 1967-

    2007-01-01

    Venemaal alanud Postimehe vastasest laimukampaaniast, kui ajaleht kirjutas ENPA presidendi Rene van der Lindeni võimalikest majandushuvidest Venemaal. Postimehe ja Vladimirskije Vedomosti peatoimetaja Grigori Belovi vahelise vestluse täistekst

  17. SEB Panga kliendikeskkond = SEB Bank customer environment

    Index Scriptorium Estoniae

    2011-01-01

    Tallinnas Kristiine keskuses asuva SEB pangakontori sisekujundusest. Autorid: Eero Jürgenson, Andres Jomp, Rene Safin (ARS Projekt), loetletud nende tehtud töid. SEB uue disainikontseptsiooni esimene rakendus

  18. 77 FR 19534 - Special Local Regulations; Savannah Tall Ships Challenge, Savannah River, Savannah, GA

    Science.gov (United States)

    2012-04-02

    ... Benjamin Mercado, Marine Safety Unit Savannah Office of Waterways Management, Coast Guard; telephone (912) 652-4353, email Benjamin.Mercado@uscg.mil . If you have questions on viewing the docket, call Renee...

  19. 77 FR 22492 - Drawbridge Operation Regulations; Long Island, New York Inland Waterway from East Rockaway Inlet...

    Science.gov (United States)

    2012-04-16

    ... material to the docket, call Renee V. Wright, Program Manager, Docket Operations, telephone 202-366-9826..., shafts, couplings, bearings, lubrication lines, span lock motors, span lock reducers, span lock...

  20. 75 FR 59620 - Natchez Fireworks Safety Zone; Lower Mississippi River, Mile Marker 365.5 to Mile Marker 363...

    Science.gov (United States)

    2010-09-28

    ... rule, call or e-mail Lieutenant Junior Grade Jason Erickson, Coast Guard; telephone 901-521-4753, e-mail Jason.A.Erickson@uscg.mil . If you have questions on viewing the docket, call Renee V. Wright...

  1. 75 FR 38716 - Safety Zone; Vietnam Veterans of America Fireworks Display, Brookings, OR

    Science.gov (United States)

    2010-07-06

    ...-9319, e-mail D13-SG-SecPortlandWWM@uscg.mil . If you have questions on viewing the docket, call Renee V... America are holding a fireworks display near Brookings, Oregon on July 4, 2010. Due to the...

  2. SEB Panga kliendikeskkond = SEB Bank customer environment

    Index Scriptorium Estoniae

    2011-01-01

    Tallinnas Kristiine keskuses asuva SEB pangakontori sisekujundusest. Autorid: Eero Jürgenson, Andres Jomp, Rene Safin (ARS Projekt), loetletud nende tehtud töid. SEB uue disainikontseptsiooni esimene rakendus

  3. Fine 5 hoiab tantsu taset kõrgel / Anu Jürisson

    Index Scriptorium Estoniae

    Jürisson, Anu, 1977-

    2015-01-01

    Eesti teatri aastaauhindade galal tantsuauhinna pälvinud tantsuteatri Fine 5 lavastusest "...and Blue", selgitusi jagavad tantsuteatri lavastajad-koreograafid Renee Nõmmik ja Tiina Ollesk. Ka Eesti professionaalse nüüdistantsu hetkeseisust

  4. ETV teeb Tartu vanglas tantsufilmi

    Index Scriptorium Estoniae

    2005-01-01

    ETV-l valmib koos EFS-i ja Estinfilmiga kultuurikanali ARTE tellimusel tantsufilm "Teine" : režissöör Rene Vilbre : stsenarist Teet Kask : produtsent Heidi Pruuli : koreograaf ja peaoaline Helena Jonsdottir

  5. Teater Varius & Co / Indrek G. Sarapuu

    Index Scriptorium Estoniae

    Sarapuu, Indrek G.

    1999-01-01

    Jazz-draama "Põud" Varius Teatri esituses, dramatiseerija ja lavastaja Heidi Sarapuu, muusika Villu Veski ansamblilt, tants Renee Nõmmikult, peaosas Haide Männamaa. Draama käsitleb taani kirjaniku Karen Blixeni elu Aafrika-perioodi. Esietend. 26. aprillil

  6. 34 Evaluation of Descartes' Rational Foundationalism Chuka A ...

    African Journals Online (AJOL)

    Ike Odimegwu

    delved into a critical search for the certainty of knowledge as to avoid error. No wonder ... to achieve this certainty by postulating his famous method ..... This analysis would come to help us ..... Rene Descartes A Discourse on the Method Tranl.

  7. Sloveenia kogemus / Raivo Juurak

    Index Scriptorium Estoniae

    Juurak, Raivo

    2008-01-01

    Mittetulundusühingu Humanitas töötajast Rene Sušast, kes tutvustab maailmahariduse olukorda Sloveenias ning kelle sõnul maailmaharidus on võrdõiguslikkus, võrdväärsus, sallivus ja turvalisus

  8. 77 FR 61753 - Granting of Request for Early Termination of the Waiting Period Under the Premerger Notification...

    Science.gov (United States)

    2012-10-11

    ... Stephen A. Wynn; Wynn Resorts, Limited; Stephen A. Wynn. 20121345 G GS Apple Investors 2011, LLC; AmRest... Corporation. For Further Information Contact: Renee Chapman, Contact Representative or Theresa Kingsberry...

  9. Nüüdistantsust Eestis: kehaliste dimensioonide avardumisest ja žanriköidikute survest vabanemisest / Evelin Lagle

    Index Scriptorium Estoniae

    Lagle, Evelin, 1986-

    2015-01-01

    Nüüdistantsu seisundilisusest, kontseptuaalsusest, koreograafiapõhisusest ja kehakesksusest Kadri Noormetsa, Karl Saksa, Mart Kangro, Henri Hüti, Külli Roosna, Kenneth Flaki, Rene ja Carmel Kösteri lavastuste näitel

  10. Fine 5 Eesti tantsuväljal / Iiris Viirpalu

    Index Scriptorium Estoniae

    Viirpalu, Iiris, 1992-

    2017-01-01

    Nüüdistantsuteatril Fine 5 täitub tänavu 25. tegutsemisaasta. Fine 5 käekirjast. Vestlusest Fine 5 tantsuteatri ja -kooli kauaaegsete kunstiliste juhtide Renee Nõmmiku ja Tiina Olleskiga Eesti tantsukunstist

  11. ETV teeb Tartu vanglas tantsufilmi

    Index Scriptorium Estoniae

    2005-01-01

    ETV-l valmib koos EFS-i ja Estinfilmiga kultuurikanali ARTE tellimusel tantsufilm "Teine" : režissöör Rene Vilbre : stsenarist Teet Kask : produtsent Heidi Pruuli : koreograaf ja peaoaline Helena Jonsdottir

  12. Fine 5 hoiab tantsu taset kõrgel / Anu Jürisson

    Index Scriptorium Estoniae

    Jürisson, Anu, 1977-

    2015-01-01

    Eesti teatri aastaauhindade galal tantsuauhinna pälvinud tantsuteatri Fine 5 lavastusest "...and Blue", selgitusi jagavad tantsuteatri lavastajad-koreograafid Renee Nõmmik ja Tiina Ollesk. Ka Eesti professionaalse nüüdistantsu hetkeseisust

  13. Esimesel arestil on absurdi maitse / Aarne Ruben

    Index Scriptorium Estoniae

    Ruben, Aarne, 1971-

    2008-01-01

    Rene Vilbre noortefilmist "Mina olin siin", mille aluseks on Sass Henno romaan "Mina olin siin. Esimene arest" : stsenarist Ilmar Raag, peaosas Rasmus Kaljujärv (Amrion Productions ja Helsinki Film, 2008). Filmi apsakatest ja ebaloogilisusest

  14. Uus kunstiskandaal New Yorgis / Neeme Raud

    Index Scriptorium Estoniae

    Raud, Neeme, 1969-

    2001-01-01

    Mustanahalise naiskunstniku Renee Coxi fotopannoo "Yo Mama's Last Supper", kus Kristuse asemel on lauas alasti neegrinaine. Linnapea Rudolph Giuliani tahab moodustada "sündsuse komisjoni", kes otsustaks eksponeeritavate kunstiteoste sobivuse üle

  15. Maarjamaalt Marylandi / Joel Siim

    Index Scriptorium Estoniae

    Siim, Joel

    2002-01-01

    Soome Evangeelse Luterliku Kiriku Tampere piiskopkonna ja EELK ühine delegatsioon külastas Delaware-Marylandi Sinodit Ameerika Ühendriikides. Reisimuljeid: Mihkel Kukk, Jaan Nuga, Rene Reinsoo, Arvo Rodi

  16. Refrigerated cutting tools improve machining of superalloys

    Science.gov (United States)

    Dudley, G. M.

    1971-01-01

    Freon-12 applied to tool cutting edge evaporates quickly, leaves no residue, and permits higher cutting rate than with conventional coolants. This technique increases cutting rate on Rene-41 threefold and improves finish of machined surface.

  17. Fine 5 tantsib Bachi järgi

    Index Scriptorium Estoniae

    2016-01-01

    Tantsuteater Fine 5 toob lavale lavastuse "HTK ehk hästi treenitud klaviir". Teos on loodud J.S. Bachi "Hästitempereeritud klaviiri" (HTK) esimese osa muusikale. Koreograafid Tiina Ollesk ja Renee Nõmmik

  18. Istorija vnov aktualna / Aleksandr Tšaplõgin

    Index Scriptorium Estoniae

    Tšaplõgin, Aleksandr, 1964-

    2007-01-01

    Euroopa Nõukogu Parlamentaarse Assamblee president Rene van der Linden kritiseeris Eestit seoses Teises maailmasõjas Saksa poolel sõdinute kokkutulekuga Sinimägedes. Parlamendiliikmete Marko Mihkelsoni, Peeter Kreitzbergi, Evelin Sepa ja Vladimir Velmani arvamusi

  19. Villa mägijärve kaldal / Dagmar Reinolt

    Index Scriptorium Estoniae

    Reinolt, Dagmar

    2015-01-01

    ARS Projekti poolt rekonstrueeritud villa Šveitsis Lugano linnas, mille uus siselahendus on voolav, moodne ja mitmetahuline. Arhitekt: Rasmus Tamme. Sisearhitektid: Rene Safin ja Eero Jürgenson. Valmimisaasta: 2014

  20. Istorija vnov aktualna / Aleksandr Tšaplõgin

    Index Scriptorium Estoniae

    Tšaplõgin, Aleksandr, 1964-

    2007-01-01

    Euroopa Nõukogu Parlamentaarse Assamblee president Rene van der Linden kritiseeris Eestit seoses Teises maailmasõjas Saksa poolel sõdinute kokkutulekuga Sinimägedes. Parlamendiliikmete Marko Mihkelsoni, Peeter Kreitzbergi, Evelin Sepa ja Vladimir Velmani arvamusi

  1. PACE president criticizes Baltics minority rights / Talis Saule Archdeacon

    Index Scriptorium Estoniae

    Archdeacon, Talis Saule

    2007-01-01

    Euroopa Nõukogu Parlamentaarse Assamblee president Rene van der Linden külastas Baltimaid ning kritiseeris vähemusrahvuste olukorda Eestis ja Lätis, tuues eeskujuks Leedut. Kriitikale vastavad Läti ja Eesti välisministrid

  2. Teater Varius & Co / Indrek G. Sarapuu

    Index Scriptorium Estoniae

    Sarapuu, Indrek G.

    1999-01-01

    Jazz-draama "Põud" Varius Teatri esituses, dramatiseerija ja lavastaja Heidi Sarapuu, muusika Villu Veski ansamblilt, tants Renee Nõmmikult, peaosas Haide Männamaa. Draama käsitleb taani kirjaniku Karen Blixeni elu Aafrika-perioodi. Esietend. 26. aprillil

  3. "See õpilasmalev on ikka täitsa tume maa" / Jaanus Kulli

    Index Scriptorium Estoniae

    Kulli, Jaanus, 1955-

    2003-01-01

    Stsenaristide-režissööride Jaak Kilmi ja Rene Reinumägi poolt läbiviidud castingutest filmi "Sigade revolutsioon" peaosaliste leidmiseks, valiti välja õpilased Uku Uusberg, Lilian Alto ja Jass Seljamaa

  4. Midagi enamat kui hea film / Peep Pedmanson

    Index Scriptorium Estoniae

    Pedmanson, Peep

    2006-01-01

    Mängufilm "Libahundi needus" : stsenaristid Margus Kasterpalu, Ilmar Raag ja Rainer Sarnet : režissöör Rainer Sarnet : osades Katariina Lauk, Rene Reinumägi : Shop of Dreams - Eesti Televisioon 2005

  5. Nüüdistantsust Eestis: kehaliste dimensioonide avardumisest ja žanriköidikute survest vabanemisest / Evelin Lagle

    Index Scriptorium Estoniae

    Lagle, Evelin, 1986-

    2015-01-01

    Nüüdistantsu seisundilisusest, kontseptuaalsusest, koreograafiapõhisusest ja kehakesksusest Kadri Noormetsa, Karl Saksa, Mart Kangro, Henri Hüti, Külli Roosna, Kenneth Flaki, Rene ja Carmel Kösteri lavastuste näitel

  6. 76 FR 10936 - Aviation Proceedings, Agreements Filed the Week Ending January 29, 2011

    Science.gov (United States)

    2011-02-28

    ... Resolution 010k Special Passenger Amending Resolution ] between Brunei Darussalam and Malaysia (Memo 1414.... Intended effective date: for travel on/after 1 July 2010. Renee V. Wright, Program Manager, Docket...

  7. Helena Jonsdottiri tantsud kaameraga / Helena Jonsdottir ; interv. Margit Tõnson

    Index Scriptorium Estoniae

    Jonsdottir, Helena

    2005-01-01

    Tartu vanglas filmitud tantsufilm "Teine" ("Another"), režissöör Rene Vilbre. Islandi koreograaf ja stsenaariumi autor Helena Jonsdottir räägib filmi tegemisest, lisatud fakte koreograafi loomingust

  8. Idols of the Psychologist: Johannes Linschoten and The demise Of Phenomenological Psychology In The Netherlands

    NARCIS (Netherlands)

    Van Hezewijk, René; Stam, Henderikus J.

    2008-01-01

    The present version is the definite version of the manuscript. The article as published may be slightly different from this version. Please contact the first author for a reprint (rene.vanhezewijk@ou.nl)

  9. Fine 5 tantsib Bachi järgi

    Index Scriptorium Estoniae

    2016-01-01

    Tantsuteater Fine 5 toob lavale lavastuse "HTK ehk hästi treenitud klaviir". Teos on loodud J.S. Bachi "Hästitempereeritud klaviiri" (HTK) esimese osa muusikale. Koreograafid Tiina Ollesk ja Renee Nõmmik

  10. USA luure : Fidel Castro on suremas / Allan Espenberg

    Index Scriptorium Estoniae

    Espenberg, Allan

    2006-01-01

    Kuuba president Fidel Castro, Haiti president Rene Preval, Filipiinide president Gloria Macapagal-Arroyo, Türkmenistani president Saparmurat Nijazov, Guinea president Lansana Conte ja Itaalia ekspeaminister Silvio Berlusconi, Sambia ekspresident Frederick Chilubaga võitlevad terviseprobleemidega

  11. Valupunktidest ja vanamuusika jõujoontest Innsbrucki rakursi alt / Saale Kareda

    Index Scriptorium Estoniae

    Kareda, Saale, 1968-

    2009-01-01

    Vanamuusika ajastutruu esitlustraditsiooni elushoidmisest, Innsbrucki vanamuusikafestivali korraldusest - festivali kunstiline juht Rene Jacobs lahkub Innsbrucki vanamuusika festivali kunstilise juhi kohalt, korralduse võtavad üle Alessandro DeMarchi ja Crista Redik

  12. 75 FR 62369 - Technology Innovation Program Advisory Board

    Science.gov (United States)

    2010-10-08

    ... Innovation Program Advisory Board AGENCY: National Institute of Standards and Technology, Department of Commerce. ACTION: Notice of public meeting. SUMMARY: The Technology Innovation Program Advisory Board... address is rene.cesaro@nist.gov . SUPPLEMENTARY INFORMATION: The Technology Innovation Program...

  13. 76 FR 18166 - Technology Innovation Program Advisory Board

    Science.gov (United States)

    2011-04-01

    ... National Institute of Standards and Technology Technology Innovation Program Advisory Board AGENCY.... SUMMARY: The Technology Innovation Program Advisory Board, National Institute of Standards and Technology.... Cesaro's e-mail address is rene.cesaro@nist.gov . SUPPLEMENTARY INFORMATION: The Technology...

  14. 76 FR 22673 - Technology Innovation Program Advisory Board

    Science.gov (United States)

    2011-04-22

    ... National Institute of Standards and Technology Technology Innovation Program Advisory Board AGENCY... notice in the Federal Register announcing an open meeting for the Technology Innovation Program Advisory... rene.cesaro@nist.gov . SUPPLEMENTARY INFORMATION: The Technology Innovation Program (TIP)...

  15. Massenet "Thaisi" näeb otseülekandes kinolinal / Toomas Kuter

    Index Scriptorium Estoniae

    Kuter, Toomas, 1965-

    2008-01-01

    Forum Cinemas toob oktoobrist maini Tallinnas Coca-Cola Plazas ja Tartus Ekraanis publikuni New Yorgi Metropolitan Opera etenduste HD-otseülekanded, 20. dets. kantakse üle Jules Massenet' ooper "Thais", peaosas Renee Fleming

  16. Mr Lawrence'ilt best-of

    Index Scriptorium Estoniae

    2007-01-01

    Renee Meriste ja muusikaettevõtte Eesti Artistide Agentuuri poolt välja antavate heliplaatide seas ka 12. dets. ilmuvast rokkansambli Mr. Lawrence kogumikalbumist "Greatest Hits", heliplaatide sarjast "Eesti Rock Antoloogia"

  17. Midagi enamat kui hea film / Peep Pedmanson

    Index Scriptorium Estoniae

    Pedmanson, Peep

    2006-01-01

    Mängufilm "Libahundi needus" : stsenaristid Margus Kasterpalu, Ilmar Raag ja Rainer Sarnet : režissöör Rainer Sarnet : osades Katariina Lauk, Rene Reinumägi : Shop of Dreams - Eesti Televisioon 2005

  18. USA luure : Fidel Castro on suremas / Allan Espenberg

    Index Scriptorium Estoniae

    Espenberg, Allan

    2006-01-01

    Kuuba president Fidel Castro, Haiti president Rene Preval, Filipiinide president Gloria Macapagal-Arroyo, Türkmenistani president Saparmurat Nijazov, Guinea president Lansana Conte ja Itaalia ekspeaminister Silvio Berlusconi, Sambia ekspresident Frederick Chilubaga võitlevad terviseprobleemidega

  19. Sådan fremstilles en fortyndingsrække

    DEFF Research Database (Denmark)

    2012-01-01

    Viser kødprøven og fortyndingsrørene. Folder stomacherposen ned, viser pipetten og dens indstilling, og udtager 1 ml udenfor filteret. 1 ml overføres og der mixes, gentag.......Viser kødprøven og fortyndingsrørene. Folder stomacherposen ned, viser pipetten og dens indstilling, og udtager 1 ml udenfor filteret. 1 ml overføres og der mixes, gentag....

  20. Status Report on Speech Research. A Report on the Status and Progress of Studies on the Nature of Speech, Instrumentation for Its Investigation, and Practical Applications.

    Science.gov (United States)

    1983-12-31

    Speculations on the control of fundamental frequency declination-Carole E. Gelfer, Katherine S. Harris, Rene Collier, and Thomas Baer .... 51-63 Selective...SPECULATIONS ON THE CONTROL OF FUNDAMENTAL FREQUENCY DECLINATION* Carole E. Gelfer,+ Katherine S. Harris,+ Rene Collier,++ and Thomas Baer...ment of the Cartesian doctrine (Reed, 1982b). Descartes ’ doctrine, stated very generally, is that all awarenesses are awarenesses of states of the body

  1. Coming of Age: Information Operations and the American Way of War

    Science.gov (United States)

    2010-06-16

    Rene Descartes , the ―Father of Modern Philosophy,‖ who famously envisioned the human condition as consisting of distinct elements of mind and body...four hundred years, is better known as dualism. Rene Descartes is perhaps the most famous advocate of this philosophical position. Descartes ...15 Ever since Descartes , material humanism and ―science‖ has encouraged the idea that only that which can be observed and measured is ―real

  2. A Clausewitzian Attack on Jihadi Communication Strategy

    Science.gov (United States)

    2012-06-01

    Military Theory,” 22. 32 Winton, “On the Nature of Military Theory,” 20. 33 Clausewitz, On War, 231. 34 Rene Descartes , A Discourse on Method, trans...Terrorism Ends: Understanding The Decline and Demise of Terrorist Campaigns. Princeton, New Jersey: Princeton University Press, 2009. Descartes , Rene ...of Descartes and Newton. The reductionism by theory provides the foundation to illuminate the essence of sought knowledge in an interactively

  3. ENTREVIS.90 OG ENTREVIS.95

    DEFF Research Database (Denmark)

    Jensen, Kjær

    1999-01-01

    Et sprogligt korpus bestående af samtlige interviews med spaniere publiceret i ugeskrifterne Cambio16 og Tiempo i årene 19990 og 1995, i alt 1.294.000 ord......Et sprogligt korpus bestående af samtlige interviews med spaniere publiceret i ugeskrifterne Cambio16 og Tiempo i årene 19990 og 1995, i alt 1.294.000 ord...

  4. Eesti televisioon tähistab üleilmset tantsupäeva erikavaga / Andri Maimets

    Index Scriptorium Estoniae

    Maimets, Andri, 1979-

    2006-01-01

    Rahvusvahelisel tantsupäeval 29. aprillil on ETV eetris kolm tantsufilmi : rahvusvahelises ühistöös valminud tantsufilm "Teine" ("Another") : režissöör Rene Vilbre : stsenaristid Rene Vilbre, Teet Kask, Helena Jonsdottir : produtsent Heidi Pruuli : koreograaf ja peaoaline Helena Jonsdottir : osatäitjad Mait Malmsten, Ruslan Stepanov ; Mozarti muusikale loodud "Suur missa" : koreograaf Uwe Scholz : Austria - Saksamaa ja inglise tantsufilm "Elu hind" : koreograaf Lloyd Newson

  5. Eesti televisioon tähistab üleilmset tantsupäeva erikavaga / Andri Maimets

    Index Scriptorium Estoniae

    Maimets, Andri, 1979-

    2006-01-01

    Rahvusvahelisel tantsupäeval 29. aprillil on ETV eetris kolm tantsufilmi : rahvusvahelises ühistöös valminud tantsufilm "Teine" ("Another") : režissöör Rene Vilbre : stsenaristid Rene Vilbre, Teet Kask, Helena Jonsdottir : produtsent Heidi Pruuli : koreograaf ja peaoaline Helena Jonsdottir : osatäitjad Mait Malmsten, Ruslan Stepanov ; Mozarti muusikale loodud "Suur missa" : koreograaf Uwe Scholz : Austria - Saksamaa ja inglise tantsufilm "Elu hind" : koreograaf Lloyd Newson

  6. ENTREVIS.90 OG ENTREVIS.95

    DEFF Research Database (Denmark)

    Jensen, Kjær

    1999-01-01

    Et sprogligt korpus bestående af samtlige interviews med spaniere publiceret i ugeskrifterne Cambio16 og Tiempo i årene 19990 og 1995, i alt 1.294.000 ord......Et sprogligt korpus bestående af samtlige interviews med spaniere publiceret i ugeskrifterne Cambio16 og Tiempo i årene 19990 og 1995, i alt 1.294.000 ord...

  7. Gammel Testamente

    DEFF Research Database (Denmark)

    Nielsen, Kirsten

    2009-01-01

    Et tilbageblik på faget Gammel Testamentes udvikling i årene 1971-2009 med vægt på den litterære vending og fagets øgede betydning for teologien som helhed.......Et tilbageblik på faget Gammel Testamentes udvikling i årene 1971-2009 med vægt på den litterære vending og fagets øgede betydning for teologien som helhed....

  8. Pengurangan Kadar N dan P pada Limbah Cair Laboratorium secara Fitoremediasi Menggunakan Enceng Gondok (Eichornia crassipes

    Directory of Open Access Journals (Sweden)

    Nurmaya Arofah

    2016-03-01

    Full Text Available Laboratory liquid waste contains both metal, nonmetal, organic and anorganic content. If it is discharged directly to environment, it will cause pollution that is harmful for living thing. Data of waste survey result in 2009-2010 indicated that liquid waste of Laboratory in Chemical Engineering Department, Gadjah Mada University (JTK UGM consist of various complex compound such as NH4+, PO43-. JTK UGM has wastewater treatment plant (WWTP to deal with environmental pollution coming from waste of each laboratory and have three process, anaerobe activated sludge, aerobe and phytoremediation. Because the laboratory’s waste was very complex, the WWTP have not operated maximally yet. So, it is necessary research on wwtp processing step, particularly for phytoremediation process using water hyacinth. Objective of this research was to study effect of concentrations N and P on adaptability and capability of water hyacinth to grow. In addition it developed a mathematical model to estimate of N and P concentration decrease rate in liquid. The research was done in batch by planting water hyacinth that has been acclimated in wastewater containing N-NH4OH and P-H3PO4. Parameter observed is N and P concentration in liquid. The result indicated that water hyacinth can absorb N and P. Water hyacinth grow well in N-NH4OH concentration of 9.651 ppm and 15.573 ppm and P-H3PO4 concentration of 2.013 ppm and 2.7373 ppm. It was marked with additional weight and colour of water hyacinth leaves of fresh green. Mathematical model presented to estimate N concentration decrease rate indicated good result in experiment. However, P concentration decrease in liquid phase, the presented model is still not good, because P nutrient decomposition process has not been accommodated during absorption by water hyacinth.

  9. Effect of Fermented Green Juice,Cellulase and Mixture on Quality of Water Hyacinth Silage%绿汁发酵液、纤维素酶及其混合物对水葫芦青贮品质的影响

    Institute of Scientific and Technical Information of China (English)

    庄益芬; 张文昌; 陈鑫珠; 许丽惠

    2008-01-01

    为探明添加绿汁发酵液(FGJ)、纤维素酶(CEL)、绿汁发酵液+纤维素酶(MIX)以及原料含水率对水葫芦青贮发酵品质的影响,用2种不同含水率(高:70.58%,低:39.62%)的水葫芦进行青贮,常温下贮存40d,开封后测定青贮的发酵品质和化学成分.结果表明:FGJ和MIX能显著改善2种含水率水葫芦青贮的发酵品质,CEL能有效提高2种含水率水葫芦青贮的WSC存留量;降低原料的含水率能提高青贮的WSC含量和减少气体的损失.

  10. EVALUACIÓN DE LA CINÉTICA DE LA ACUMULACIÓN DE CROMO EN EL BUCHÓN DE AGUA (Eichhornia crassipes AVALIAÇÃO DA CINÉTICA DE ACUMULAÇÃO DE CROMO EM JACINTO DE AGUA (Eichhornia crassipes EVALUATION OF THE KINETICS OF ACCUMULATION OF CHROMIUM IN WATER HYACINTH (Eichhornia crassipes

    Directory of Open Access Journals (Sweden)

    RICARDO BENÍTEZ

    2011-12-01

    Full Text Available Eichhornia crassipes es una planta de rápido crecimiento distribuida en casi todos los países tropicales, que puede tolerar condiciones de contaminación por metales o por eutrificación de cuerpos de aguas lénticos y lóticos. Esta planta se ha convertido en un problema ambiental; no obstante, ha despertado interés en el tratamiento de la contaminación por metales en suelos agrarios y cuerpos de agua. La toxicidad de los metales es un serio inconveniente en esta motivación, ya que influye en la capacidad de acumulación y la transmisión en la cadena trófica. En esta investigación se evaluó el comportamiento de las tasas de acumulación de cromo en la macrófita acuática Eichhornia crassipes, a concentraciones de 30, 60 y 90 mg/L, utilizando un diseño experimental aleatorio, con control y tres repeticiones por nivel. Los estudios llevados a cabo en acuarios de vidrio, evidenciaron sitios de acumulación de cromo en la planta, estableciéndose la cinética de acumulación.Eichhornia crassipes é uma planta de rápido crescimento distribuídas em quase todos os países tropicais, que podem tolerar condições de contaminação por metáis ou de eutrofização das massas de águas lênticos e lóticos. Essa planta tornou-se um problema ambiental, no entanto, despertou o interesse no tratamento da poluição por metais em solos agrícolas e corpos d'água. A toxicidade dos metais é um problema serio com esse raciocínio, uma vez que afeta a capacidade de armazenamento e transmissão na cadeia alimentar. Neste estudo avaliou o comportamento das taxas de acúmulo de cromo em macrófitas aquáticas Eichhornia crassipes, em concentrações de 30, 60 e 90 mg/L, utilizando um delineamento inteiramente casualizado, com controle e três repetições por nível. Estudos realizados em aquários de vidro, apresentaram sítios de acumulação de crómio na planta, que institui a cinética de acumulação.Eichhornia crassipes is a fast growing plant distributed in almost all tropical countries, which can tolerate conditions of metal contamination or eutrophication of bodies of lentic and lotic waters. This plant has become an environmental problem, however, has sparked interest in the treatment of metal pollution in agricultural soils and water bodies. The toxicity of metals is a serious problem with this reasoning, since it affects the storage capacity and transmission into the food chain. In this study we evaluated the behavior of the rates of accumulation of chromium in aquatic macrophyte Eichhornia crassipes, at concentrations of 30, 60 and 90 mg/L, using a randomized experimental design with control and three replicates per level. Studies carried out in glass aquaria, showed sites of accumulation of chromium in the plant, establishing the kinetics of accumulation.

  11. 水葫芦-水草人工湿地系统在再生浆造纸废水处理中的应用研究%APPLICATION STUDY OF ARTIFICIAL WETLANDS SYSTEM OF COMMON WATER HYACINTHES-WATERGRASS IN WASTE WATER TREATMENT OF PAPER MAKING WITH RECYCLING PULP

    Institute of Scientific and Technical Information of China (English)

    李亚治

    2000-01-01

    通过对水葫芦-水草人工湿地处理再生浆造纸废水的试验研究表明,在进水pH7.12~7.49,BOD5、CODcr、SS浓、度分别为440.5mg/L、354.2mg/L、290.7mg/L,水力负荷0.05m/d的条件下,BOD5、CODcr、SS的去除率分别为98%、93%、和89%.系统性能稳定,出水水质达到排放标准且可用于农灌.

  12. Ação de adjuvantes na absorção e translocação de glyphosate em plantas de aguapé (Eichhornia crassipes The effect of adjuvants on glyphosate absorption and translocation in water hyacinth (Eichhornia crassipes

    Directory of Open Access Journals (Sweden)

    D. Martins

    2009-03-01

    Full Text Available Este estudo teve por objetivo avaliar a ação de adjuvantes na absorção e translocação de glyphosate em plantas de aguapé (Eichhornia crassipes. Os tratamentos foram dispostos em esquema fatorial 5 x 8, sendo: cinco tratamentos com glyphosate (sem adjuvante e com os adjuvantes Aterbane a 0,5 e 0,25% v/v e Silwet L77 a 0,1 e 0,05% v/v, aplicados somente em uma folha de cada planta; e oito intervalos para lavagem ou corte das folhas (2, 4, 6, 8, 12, 24 e 48 horas, além de um intervalo contínuo sem lavagem ou corte. Foram realizadas avaliações visuais de controle aos 7, 14, 21 e 28 dias após a aplicação dos tratamentos. Os adjuvantes Aterbane a 0,5% e Silwet a 0,1% promoveram maior controle em períodos mais curtos sem a lavagem das folhas (duas e quatro horas, embora no final do estudo todos os adjuvantes tenham resultado em controle eficiente a partir de duas horas, assim como o glyphosate sem adjuvante. No estudo de translocação, independentemente do adjuvante testado, observou-se excelente controle após o período de seis horas sem o corte das folhas. Nos períodos de duas e quatro horas, observou-se controle insatisfatório independentemente do adjuvante testado: esse fato demonstra que o corte das folhas em períodos inferiores a seis horas após a aplicação não é suficiente para uma translocação eficiente e garantir o controle de plantas de aguapé.This study was carried out to evaluate the effects of adjuvants on glyphosate absorption and translocation in Eichhornia crassipes. The treatments were arranged in a 5 x 8 factorial scheme, being five with glyphosate (with no adjuvant and with the adjuvants Aterbane at 0.5 and 0.25% v/v and Silwet L 77 at 0.1 and 0.05% v/v applied on a single leaf of each plant at 8 intervals to wash or cut the leaves (2, 4, 6, 8, 12, 24, and 48 hours, plus a continuous interval without washing or cutting. Visual control evaluations were carried out at 7, 14, 21, and 28 days after treatment application. The absorption of 0.5% Aterbane and 0.1% Silwet promoted a higher control after shorter periods without leaf washing (2 and 4 hours.However, by the end of the study, all the adjuvants showed an excellent control after the period of 6 hours, as well as glyphosate without adjuvant. For the translocation study, no leaf cutting after six hours promoted an excellent control, regardless of the adjuvant tested. For the 2 and 4 hour periods, an unsatisfactory control was observed, regardless of the adjuvant tested, showing that leaf cutting during periods below 6 hours after application is not sufficient for an efficient translocation and to guarantee control of the aquatic plants.

  13. Mecanismos anatômicos e fisiológicos de plantas de aguapé para a tolerância à contaminação por Arsênio Anatomical and physiological mechanisms of water hyacinth plants to Arsenic contamination tolerance

    Directory of Open Access Journals (Sweden)

    F.J. Pereira

    2011-06-01

    Full Text Available Este trabalho teve como objetivo a avaliação das características anatômicas e fisiológicas de aguapé (Eichhornia crassipes em resposta ao estresse por arsênio. As plantas de aguapé foram cultivadas em solução nutritiva hidropônica de Hoagland em casa de vegetação sob cinco concentrações de arsênio: 0,0; 0,25; 0,5; 1,0; e 2,0 mg L-1 por período de 20 dias. As plantas demonstraram aumento na taxa fotossintética, na condutância estomática, na transpiração e na relação Ci/Ca, bem como na atividade de todas as enzimas do sistema antioxidante, com maior atividade nas folhas em relação às raízes nos tratamentos contendo arsênio. As características anatômicas das folhas das plantas sob as maiores concentrações de arsênio mostraram aumento na densidade estomática, no índice estomático e na espessura do parênquima esponjoso. A anatomia radicular não evidenciou alterações decorrentes da intoxicação por arsênio e modificações nas características do xilema e floema, porém não houve prejuízos à sua estrutura e função. Dessa forma, o estresse por intoxicação pelo arsênio, nas concentrações testadas, não é evidente nas plantas de E. crassipes, e os mecanismos de tolerância são relacionados com modificações na anatomia e fisiologia das plantas.This work aimed to evaluate the anatomical and physiological characteristics of Eichhornia crassipes in response to arsenic stress. Plants of E. crassipes were grown in Hoagland hydroponic nutritive solution under greenhouse conditions at five arsenic levels: 0.0, 0.25, 0.50, 1.0 and 2.0 mg L-1 during 20 days. The plants showed an increase in photosynthetic rate, stomatal conductance, transpiration and Ci/Ca rate, as well as in the activity of all the enzymes in the antioxidant system, with higher activity in the leaves than in the roots, in all the treatments with arsenic. The anatomical characteristics observed on the leaves of the plants under higher arsenic levels showed an increase in stomatal density, stomatal index and spongy parenchyma thickness. Root anatomy showed no toxic evidences at any arsenic level; changes in the xylem and phloem characteristics were exhibited by the roots in the arsenic treatments, but no damage was caused to its structure and function. Thus, stress caused by arsenic intoxication at the levels tested, is not evident on E. crassipes plants, and the mechanisms of tolerance of E. crassipes are associated to anatomical and physiological changes.

  14. Integrating animal manure-based bioenergy production with invasive species control: A case study at Tongren Pig Farm in China

    Energy Technology Data Exchange (ETDEWEB)

    Lu, Jianbo; Zhu, Lei [Institute of Agro-Ecology and Ecological Engineering, College of Life Sciences, Zijingang Campus, Zhejiang University, Hangzhou 310058 (China); Hu, Guoliang [Rural Energy Section, Agricultural Bureau of Haining City, Zhejiang Province 314400 (China); Wu, Jianguo [Institute of Agro-Ecology and Ecological Engineering, College of Life Sciences, Zijingang Campus, Zhejiang University, Hangzhou 310058 (China); School of Life Sciences and Global Institute of Sustainability, Arizona State University, Tempe, AZ 85287-4501 (United States)

    2010-06-15

    Integrated approach and bioresource engineering are often required to deal with multiple and interactive environmental problems for sustainable development at local and regional scales. Pig farming has flourished with fast growing economy and increasing human demands for meat in China. Water hyacinth (Eichhornia crassipes), a noxious invasive species, has encroached into most of the local rivers and lakes. Both the wastes from the booming pig farms as well as the massive plant materials of water hyacinth have caused a range of serious ecological and environmental problems. Here we present an integrated sustainable, ecological and experimental study that was designed to deal with these two problems simultaneously. Our experimental results showed that the mixtures of water hyacinth with pig manure consistently had much higher biogas production than pig manure alone, and that the highest biogas production was achieved when 15% of the fermentation substrates were water hyacinth. Our analysis further revealed that the changing C/N ratio and the lignin content in the fermentation feedstock due to the addition of water hyacinth might be two important factors affecting the biogas production. We also found that the solar-powered water-heating unit significantly increased the biogas production (especially in winter time). Overall, the project proved to be successful ecologically and socially. Through such an integrated approach and bioresource engineering, wastes are treated, energy is harvested, and the environment is protected. (author)

  15. Cultivation of macroscopic marine algae and fresh water aquatic weeds

    Energy Technology Data Exchange (ETDEWEB)

    Ryther, J.H.

    1982-02-01

    The ORCA clone of the red seaweed Gracilaria tikvahiae has been in culture continuously for over two years. Yield for the past year has averaged 12 g ash-free dry wt/m/sup 2/ .day (17.5 t/a.y) in suspended 2600-1 aluminum tank cultures with four exchanges of enriched seawater per day and continuous aeration. Yields from nonintensive pond-bottom culture, similar to commercial Gracilaria culture methods in Taiwan, averaged 3 g afdw/m/sup 2/.day in preliminary experiments. Rope and spray cultures were not successful. Yields of water hyacinths from March 1978 to March 1979 averaged 25 g afdw/m/sup 2/.day (37 t/a.y). Season, nutrient availability (form and quantity) and stand density were found to affect the relative proportions of structural and nonstructural tissue in water hyacinths and thereby significantly affect digestibility of and methane production by the plants. Pennywort (Hydrocotyle) grew poorly in winter and its annual yield averaged only one-third that of water hyacinth. Water lettuce (Pistia) appears more comparable to hyacinths in preliminary studies and its yields will be monitored throughout a complete year. Stable, continuous anaerobic digestion of both water hyacinths and Gracilaria has been maintained with an average gas production from both species of 0.4 1/g volatile solids at 60% methane.

  16. Effect of Composition of Bond Coating on the Durability of the Plasma Sprayed Zr O[sub 2]-Ce O[sub 2]-Y[sub 2] O[sub 3] Thermal Barrier Coating

    Energy Technology Data Exchange (ETDEWEB)

    Kim, H.S. (Korea Institute of Science and Technology, Seoul (Korea, Republic of)); Kim, B.H.; Suhr, D.S. (Chungnam National University, Taejon (Korea, Republic of))

    1999-01-01

    The effect of alloy compositions of the bond coating on the plasma sprayed-thermal barrier coatings was investigated. The performance of the coating composed of Rene 80/NiCrAl/ZrO[sub 2]-CeO[sub 2]-Y[sub 2]O[sub 3] and Rene 80/CoNiCrAlY/ZrO[sub 2]-CeO[sub 2]-Y[sub 2]O[sub 3] was evaluated by isothermal and thermal cyclic test in an ambient atmosphere at 1150 deg. C. The failure of Rene 80/NiCrAl/ZrO[sub 2]-CeO[sub 2]-Y[sub 2]O[sub 3] coatings was occurred at the bond coating/ceramic coating interface while Rene 80/CoNiCrAlY/ZrO[sub 2]-CeO[sub 2]-Y[sub 2]O[sub 3] coating was failed at the substrate/bond coating interface after thermal cyclic test. The lifetime of Rene 80/NiCrAl/ZrO[sub 2]-CeO[sub 2]-Y[sub 2]O[sub 3] coatings was longer than Rene 80/CoNiCrAlY/ZrO[sub 2]-CeO[sub 2]-Y[sub 2]O[sub 3] coating. The oxidation rate of the NiCrAl bond coating examined by TGA was lower than CoNiCrAlY bond coating. In summary, these results suggest that Rene 80/CoNiCrAlY/ZrO[sub 2]-CeO[sub 2]-Y[sub 2]O[sub 3] system as thermal barrier coating be not suitable considering the durability of the coating layer for high temperature oxidation and thermal stress. (author). 12 refs., 14 figs., 2 tabs.

  17. Effect of Composition of Bond Coating on the Durability of the Plasma Sprayed Zr O{sub 2}-Ce O{sub 2}-Y{sub 2} O{sub 3} Thermal Barrier Coating

    Energy Technology Data Exchange (ETDEWEB)

    Kim, H.S. [Korea Institute of Science and Technology, Seoul (Korea, Republic of); Kim, B.H.; Suhr, D.S. [Chungnam National University, Taejon (Korea, Republic of)

    1999-01-01

    The effect of alloy compositions of the bond coating on the plasma sprayed-thermal barrier coatings was investigated. The performance of the coating composed of Rene 80/NiCrAl/ZrO{sub 2}-CeO{sub 2}-Y{sub 2}O{sub 3} and Rene 80/CoNiCrAlY/ZrO{sub 2}-CeO{sub 2}-Y{sub 2}O{sub 3} was evaluated by isothermal and thermal cyclic test in an ambient atmosphere at 1150 deg. C. The failure of Rene 80/NiCrAl/ZrO{sub 2}-CeO{sub 2}-Y{sub 2}O{sub 3} coatings was occurred at the bond coating/ceramic coating interface while Rene 80/CoNiCrAlY/ZrO{sub 2}-CeO{sub 2}-Y{sub 2}O{sub 3} coating was failed at the substrate/bond coating interface after thermal cyclic test. The lifetime of Rene 80/NiCrAl/ZrO{sub 2}-CeO{sub 2}-Y{sub 2}O{sub 3} coatings was longer than Rene 80/CoNiCrAlY/ZrO{sub 2}-CeO{sub 2}-Y{sub 2}O{sub 3} coating. The oxidation rate of the NiCrAl bond coating examined by TGA was lower than CoNiCrAlY bond coating. In summary, these results suggest that Rene 80/CoNiCrAlY/ZrO{sub 2}-CeO{sub 2}-Y{sub 2}O{sub 3} system as thermal barrier coating be not suitable considering the durability of the coating layer for high temperature oxidation and thermal stress. (author). 12 refs., 14 figs., 2 tabs.

  18. Produksi biogas dari pencerna anaerob serasah dan eceng gondok (Eichhornia crassipes dengan sumber inokulum kotoran sapi dan kotoran ayam

    Directory of Open Access Journals (Sweden)

    REVOLUSI PRAJANINGRAT SAKTIYUDHA

    2014-11-01

    Full Text Available Saktiyudha RP. 2014. Biogas production from anaerobic digesters of leaf litter and water hyacinth (Eichhornia crassipes with a source of inoculum cattle and chicken manures. Bioteknologi 11: 23-27. Biogas is a renewable alternative energy source also has the added value, which is in the processing of waste biomass is environmentally friendly. This study aims to examine the production of biogas in anaerobic reform process based on a mixture of biomass litter substrate and water hyacinth (Eichhornia crassipes Mart. Solms using inoculum source of cattle manure and chicken manure. Litter biomass and water hyacinth biomass were as a substrate (80% in the anaerobic digester with inoculum source of cattle manure or chicken manure (20% through the fermentation process. Factorial experiment with four replications performed using a completely randomized design (CRD with two factors. The first factor in the form of variations in the substrate, the substrate control with 100 % litter, litter substrate variation and water hyacinth (75%:25%, and a mixture of litter and water hyacinth (50%:50% . The second factor were a variation of the source of inoculum, ie cattle manure and chicken manure. Parameter measurements performed at weeks 0th, 2nd, 4th, 6th. Parameters observed were volume of biogas, CH4 concentration, temperature, pH, COD, BOD, TS and VS. Data were analyzed by ANOVA followed by DMRT at 5 % level test. Highest production of biogas in the sixth week (862.5 ml was showed by the treatment of 75 % litter and 25 % water hyacinth with inoculum source of cattle manure. Removal efficiency of COD; BOD; TS and VS on that treatment were amounted to 76.12 %, 32.88 %, 66.53 % and 63.74 %.

  19. Tungere standardkilogram

    DEFF Research Database (Denmark)

    Pedersen, Jens Olaf Pepke

    2013-01-01

    Et kilogram har siden 1889 været defineret som massen af det Internationale Prototypekilogram (IPK) i Paris, og det er den eneste enhed, som stadig er defineret ved en bestemt fysisk genstand. Men med årene er de fleste af kopierne blevet tungere i forhold til IPK.......Et kilogram har siden 1889 været defineret som massen af det Internationale Prototypekilogram (IPK) i Paris, og det er den eneste enhed, som stadig er defineret ved en bestemt fysisk genstand. Men med årene er de fleste af kopierne blevet tungere i forhold til IPK....

  20. Proceedings from the ETS and ARI Emotional Intelligence Workshop held in Princeton, New Jersey on November 13-15, 2003. Volume 1. Sessions 1 and 2

    Science.gov (United States)

    2003-11-01

    My Heart has a Mind of its Own” Renee to Ally McBeal: “Emotionally, you’re an idiot.” Various people have claimed that emotional reasoning is...its own,” makes a similar claim. And in the TV drama, "Ally McBeal," Renee said to Ally: “emotionally you are an idiot”. Now let us see the...contemptuously • Descartes : Passion determined by the strength of association of the eliciting object with things that have been harmful to the body