Tesi sul tema "Effect of perchlorates on Plants"
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Struckhoff, Garrett Cletus Parkin Gene F. "Plant-assisted bioremediation of perchlorate and the effect of plants on redox conditions and biodiversity in low and high organic carbon soil". [Iowa City, Iowa] : University of Iowa, 2009. http://ir.uiowa.edu/etd/441.
Testo completoStruckhoff, Garrett Cletus. "Plant-assisted bioremediation of perchlorate and the effect of plants on redox conditions and biodiversity in low and high organic carbon soil". Diss., University of Iowa, 2009. https://ir.uiowa.edu/etd/441.
Testo completoSakhatska, I. M. "Study of medicinal plants with sedative effect". Thesis, БДМУ, 2021. http://dspace.bsmu.edu.ua:8080/xmlui/handle/123456789/18909.
Testo completoChakauya, Ereck. "Effect of manipulating pantothenate biosynthesis in higher plants". Thesis, University of Cambridge, 2005. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.614866.
Testo completoVoss, Joshua. "Forage adaptability trials for forage and seed production in Bolivia : effect of 5 herbicides on 7 native Utah forbs /". Diss., CLICK HERE for online access, 2006. http://contentdm.lib.byu.edu/ETD/image/etd1639.pdf.
Testo completoWang, Ding Xiang. "Interaction between the effects of sodium chloride and high temperature on the vegetative growth of tomato (Lycopersicon esculentum Mill.)". Title page, contents and summary only, 1993. http://web4.library.adelaide.edu.au/theses/09PH/09phw2456.pdf.
Testo completoSangwan, Veena. "Temperature sensing in plants". Thesis, McGill University, 2000. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=37831.
Testo completoFirst, it was shown that the studies on calcium mediation of cold acclimation in alfalfa cell suspension cultures could be applied to intact seedlings of Arabidopsis. Calcium chelators and channel blockers caused a strong reduction in the cold-induced accumulation of kin1 and kin2 transcripts, suggesting that calcium influx was an essential event during cold signaling and that the source of calcium for this influx was largely the calcium-rich cell wall. Evidence suggesting the involvement of calcium-dependent protein kinases (CDPKs) was also obtained.
Second, the nature of events upstream of calcium influx was explored. For this study, transgenic Brassica napus seedlings possessing both the endogenous cold-inducible BN115 gene and the coding part of beta-glucuronidase (GUS) gene placed under the control of the BN115 promoter were used. Thus cold-activation of the BN115 promoter drove the expression of both BN115 at the transcriptional level and the GUS enzyme activity at the translational level. Cold-activation of BN115 was inhibited by chemicals which cause membrane fluidization, cytoskeletal stabilization and inhibition of Ca2+ influx, and mimicked at 25°C by chemicals causing membrane rigidification, cytoskeletal destabilization and Ca2+ influx. Inhibitors of protein and lipid kinases prevented cold-activation of BN115, but inhibition of protein phosphatases activated BN115 at 25°C.
Third, given the increasing importance of mitogen-activated protein kinases (MAPKs) in signal transduction, the nature of molecular mechanisms that lead to cold-activation of a previously reported MAPK, SAMK, was investigated. During this study, the first plant MAPK activated by heat shock was discovered and named HAMK (Heat-shock-activated MAPK). It was shown that cold-activation of SAMK is mediated by cold-induced membrane rigidification, whereas the heat shock-activation of HAMK occurs through heat shock-induced membrane fluidization. Whereas activation of both SAMK and HAMK is blocked by an actin microfilament stabilizer, it is mimicked at 25°C by chemical destabilizers of microtubules or actin microfilaments. All of these events are inhibited by blocking the influx of extracellular Ca 2+. Cold-activation of SAMK and heat-activation of HAMK was prevented by treatment of cells with inhibitors of CDPKs. Thus, cold and heat shock are sensed by structural changes in the plasma membrane, which transduces the signal via cytoskeletal rearrangements to the opening of calcium channels, leading to Ca2+ influx, activation of CDPKs and activation of distinct MAPK cascades.
Gencoglu, Cihangir. "Assessment Of The Effect Of Hydroelectric Power Plants'". Master's thesis, METU, 2010. http://etd.lib.metu.edu.tr/upload/12612165/index.pdf.
Testo completoLau, Ka Keung. "Effect of Oâ†3 fumigation on nitrate reduction in plants". Thesis, Lancaster University, 1996. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.337586.
Testo completoLoÌpez-Chuken, Ulriko J. "The effect of chloro-complexation on cadmium uptake by plants". Thesis, University of Nottingham, 2005. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.430615.
Testo completoMcKee, J. "The effect of temperature on sexual reproduction in flowering plants". Thesis, University of Newcastle Upon Tyne, 1997. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.360337.
Testo completoMjwara, Jabulani Michael. "The interactive effects of light, temperature and CO₂/O₂ ratios in photosynthesis of Coix lachryma-jobi L". Thesis, Rhodes University, 1992. http://hdl.handle.net/10962/d1003785.
Testo completoAnderson, Annette. "The effects of acetolactate synthase (ALS) inhibiting herbicides on the growth, yield, nodulation and nitrogen fixation of selected legumes". Title page, contents and abstract only, 2001. http://web4.library.adelaide.edu.au/theses/09PH/09pha545.pdf.
Testo completoGreyvenstein, Fritz Siegruhn. "Performance prediction for multi-effect distillation (MED) plants / by F.S. Greyvenstein". Thesis, North-West University, 2007. http://hdl.handle.net/10394/855.
Testo completoThesis (M.Ing. (Nuclear Engineering))--North-West University, Potchefstroom Campus, 2008.
Torp, Mikaela. "The effect of snow on plants and their interactions with herbivores". Doctoral thesis, Umeå : Department of Ecology and Environmental Science, Umeå University, 2010. http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-30444.
Testo completoIngarfield, Patricia Jean. "Effect of water stress and arbuscular mycorrhiza on the plant growth and antioxidant potential of Pelargonium reniforme Curtis and Pelargonium sidoides DC". Thesis, Cape Peninsula University of Technology, 2018. http://hdl.handle.net/20.500.11838/2794.
Testo completoPelargoniums have been studied extensively for their medicinal properties. P. reniforme and P. sidoides in particular are proven to possess antimicrobial, antifungal and antibiotic abilities due to their high antioxidant potential from compounds isolated from their tuberous roots. These plants have now been added to the medicine trade market and this is now causing concern for conservationists and they are generally harvested from the wild populations. This study evaluated the effect of water stress alone and in conjunction with arbuscular mycorrhiza on two species of Pelargoniums grown in a soilless medium. The experiment consisted of five different watering regimes which were applied to one hundred plants of each species without inoculation with arbuscular mycorrhiza and to one hundred plants of each species in conjunction with inoculation with AM. All the plants in the experiment were fed with a half-strength, standard Hoagland nutrient solution at varying rates viz. once daily to pot capacity, every three days to pot capacity, every six days to pot capacity, every twelve days to pot capacity and every twenty-four days to pot capacity. The objectives of the study were to measure the nutrient uptake, SPAD-502 levels (chlorophyll production) and metabolite (phenolics) formation of both species, grown under various rates of irrigation and water stress, as well with or without the addition of arbuscular mycorrhiza at planting out. Each treatment consisted of 10 replicates. SPAD-502 levels were measured weekly using a hand held SPAD-502 meter. Determination of nutrient uptake of macronutrients N, K, P, Ca, Mg and Na and micronutrients Cu, Zn, Mn, Al and B were measured from dry plant material at the end of the experiment by Bemlab, 16 Van Der Berg Crescent, Gants Centre, Strand. Plant growth in terms of wet and dry shoot and root weight were measured after harvest. Determination of concentrations of secondary metabolites (phenolic compounds) were assayed and measured spectrophotometrically at the end of the experiment. The highest significant reading of wet shoot weight for P. reniforme was taken in treatments 1 and 2 with and without mycorrhiza i.e. WF1, WF1M, WF2 and WF2M, with the highest mean found in WF1 with no mycorrhiza. This indicates that under high irrigation AM plays no part in plant growth, possibly due to leaching. More research is necessary in this regard. With regard to wet root weight, this was found to be not significant in any of the treatments, other than the longest roots being found in WF4. Measurements for dry root weight showed that WF1,2,3 and 5 were the most significant at P≤ 0.001 significance, with the highest weight found at treatment being WF3 and WF3M. The highest mean of shoot length of the plants was measured in treatment WF2 at moderate watering, but no statistical difference was found with water application and mycorrhiza addition. Nutrient uptake was increased in P. sidoides in all the different watering levels in the experiment except in the uptake of Mg. AM inoculation showed an increase in the uptake of Ca, while absorption of N occurred at higher water availability. K uptake was enhanced by the addition of AM in high water availability and K utilisation decreased as water stress increased. Medium to low watering resulted in higher leaf content in P. sidoides while the interaction between water availability and AM inoculation increased chlorophyll production towards the end of the experiment.
Lumbuenamo, Sinsi Dianza 1954, e Sinsi Dianza 1954 Lumbuenamo. "Litter cover effect on soil spectral response". Thesis, The University of Arizona, 1987. http://hdl.handle.net/10150/276620.
Testo completoAyub, Najma. "The effect of VAM inoculation on interplant ¹⁵N transfer". Thesis, University of Aberdeen, 1991. http://digitool.abdn.ac.uk/R?func=search-advanced-go&find_code1=WSN&request1=AAIU546184.
Testo completoBrownell, Peter Ferguson. "Sodium as an essential element for C4 plants /". Title page, contents and summary only, 1993. http://web4.library.adelaide.edu.au/theses/09SD/09sdb884.pdf.
Testo completoKalifa, Ali. "Salt stress, and phosphorus absorption by potato plants cv. 'Russet Burbank'". Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1997. http://www.collectionscanada.ca/obj/s4/f2/dsk2/ftp04/mq29727.pdf.
Testo completoAdhikari, Sajag. "Solvent Effects and Bioconcentration Patterns of Antimicrobial Compounds in Wetland Plants". Thesis, University of North Texas, 2011. https://digital.library.unt.edu/ark:/67531/metadc67953/.
Testo completoAyeni, Olutoyosi Olaide. "Growth responses within the Genus Cyperus exposed to aluminium and iron in hydroponics". Thesis, Cape Peninsula University of Technology, 2016. http://hdl.handle.net/20.500.11838/2430.
Testo completoGenerally, aluminium (Al) is required as a micronutrient by plants. The metabolism of Al within the plant can exert a number of effects within the plant. These include: interfering with cell division in both root tips and lateral roots, increasing cell wall rigidity, maintaining the correct cellular redox state, as well as the various other physiological and growth responses. Al is one of the most abundant elements in the earth’s crust and becomes toxic in many plants when the concentration is greater than 2-3 ppm, where the soil has a pH<5.5. Iron (Fe) is an equally important element, and the toxicity of this metal possesses constraints primarily on wetland plants growing in acidic soils that have high reducible iron content. The impact of metal toxicity (Al and Fe) requires an understanding of many aspects related to Al and Fe uptake, transport and distribution by plants in wetland ecosystems. In this study, three species of Cyperus viz. Cyperus alternifolius, Cyperus prolifer and Cyperus textilis were used to carry out phytotoxicity tests to monitor xenobiotic substances.
Eakes, Donald Joseph. "Moisture stress conditioning, potassium nutrition, and tolerance of Salvia splendens 'Bonfire' to moisture stress". Diss., Virginia Polytechnic Institute and State University, 1989. http://hdl.handle.net/10919/54350.
Testo completoPh. D.
Voigt, Astrid. "Bioavailability of trace metals to plants". Thesis, McGill University, 2003. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=19561.
Testo completoChoudhury, Feroza Kaneez. "Rapid Metabolic Response of Plants Exposed to Light Stress". Thesis, University of North Texas, 2018. https://digital.library.unt.edu/ark:/67531/metadc1157543/.
Testo completoAttumi, Al-Arbe. "Effect of salt stress on phosphorus and sodium absorptions by soybean plants". Thesis, McGill University, 1997. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=20242.
Testo completoSaif, Salman Mohammed 1958. "EFFECT OF SALINITY ON THE TOMATO PLANTS GROWN IN A HYDROPONIC SYSTEM". Thesis, The University of Arizona, 1986. http://hdl.handle.net/10150/277070.
Testo completoBarron-Gafford, Greg A., Rebecca L. Minor, Nathan A. Allen, Alex D. Cronin, Adria E. Brooks e Mitchell A. Pavao-Zuckerman. "The Photovoltaic Heat Island Effect: Larger solar power plants increase local temperatures". NATURE PUBLISHING GROUP, 2016. http://hdl.handle.net/10150/621943.
Testo completoRahman, Yosra Ahmed Soltan Abd El. "Effect of tanniniferous plants and essential oils on methane emission in ruminants". Universidade de São Paulo, 2012. http://www.teses.usp.br/teses/disponiveis/64/64134/tde-26092012-134451/.
Testo completoTaninos e óleos essenciais são metabólitos secundários que podem ser utilizados como modificadores naturais da fermentação ruminal para reduzir a emissão de metano (CH4) de ruminantes. Para estudar a aplicação de plantas ricas em taninos oriundas do Egito e do Brasil, bem como óelos essencias disponíveis no comércio internacional, três estudos foram conduzidos no Laboratório de Nutrição Animal do Centro de Energia Nuclear na Agricultura da Universidade de São Paulo, Piracicaba. O primeiro estudo teve como objetivo investigar o potencial das plantas taniníferas prosopis (Prosopis juliflora), acácia (Acasia saligna), atriplex (Atriplex halimus) e leucena (Leucaena leucocephala) em ensaio in vitro de produção de gás, avaliando o potencial metanogênico, a degradabilidade ruminal da proteína e a digestibilidade da proteína pós-ruminal, em comparação com feno de Tífton (Cynodon spp.) como alimento sem tanino. O ranking das plantas de acordo com seu potencial de redução de CH4 com base na matéria orgânica verdadeiramente degradada (MODV) foi acácia> leucena> atríplex> prosopis. Prosopis e leucena apresentaram maior (P=0,002) produção de propionato (C3) com diminuição (P=0,004) correspondente na relação acetato:propionato (C2/C3). Acácia e leucena apresentaram menor (P=0,0002) concentração de NH3-N associada com a diminuição na degradabilidade ruminal da proteína. No entanto, a leucena mostrou maior (P<0,0001) digestibilidade da proteína intestinal que a acácia. O objetivo do segundo estudo foi avaliar in vitro o potencial dos óleos essenciais carvacrol (CAR) e eugenol (EUG), nas doses 5, 10 e 20 (CAR) e 10, 20 e 30 (EUG) \'mü\'l/75ml de fluido de cultura, como alternativa de modificadores naturais da fermentação ruminal em comparação com a Monensina (MON) (3 \'mü\'M/75ml de fluido de cultura) como controle positivo. CAR10 e EUG20 apresentaram similaridade na CH4 e MODV comparado com MON, no entanto foram diferentes (P<0.05) no perfil de AGV, onde MON aumentou a concentração de C3 e diminuiu C2/C3, mas ambos CAR10 e EUG20 aumentaram (P<0,0001) as concentrações de butirato. Leucena foi selecionada no terceiro estudo para avaliação in vivo da atividade biológica de taninos na digestibilidade aparente, balanço de nitrogênio, fermentação ruminal e emissão de CH4. Seis ovinos Santa Inês adultos, canulados no rúmen (70±2,5kg) foram individualmente divididos em três dietas experimentais em delineamento quadrado latino duplo (3tratamentos, 3períodos, 6animais). A dieta controle (CNTRL), contendo feno de Tífton (70%), farelo de soja (21%) e milho (9%). A dieta (LEUC), contendo leucena (123 e 8,8g/kg MS taninos totais e taninos condensados, respectivamente), consistiu na dieta controle, tendo 50% do feno de Tífton substituído pela leucena. A dieta LPEG constituiu da dieta LEUC mais a adição de 20g/dia/animal de polietileno glicol (PEG). Dietas contendo leucena aumentaram (P=0,008) a ingestão de proteína bruta, nitrogênio (P=0,005) e lignina (P<0,001) em comparação com CNTRL, enquanto não houve diferenças significativas para as digestibilidades aparentes das nutrientes mas a dieta LEUC diminuiu (P=0,0009) a digestibilidade da fibra em detergente ácido, amônia ruminal (P<0,0001) e excreção urinária de nitrogênio (P=0,0065). Dietas contendo leucena diminuíram (P<0,0001) CH4 bem como diminuíram (P<0,0001) C2/C3 em comparação com CNTRL. Estes estudos destacam o potencial das plantas taniníferas e os óleos essenciais para modular a fermentação ruminal e reduzirem a emissão de CH4
De, Canha Marco Nuno. "Antimicrobial and anti-inflammatory effect of southern African plants against Propionibacterium acnes". Diss., University of Pretoria, 2014. http://hdl.handle.net/2263/79786.
Testo completoDissertation (MSc)--University of Pretoria, 2014.
National Research Foundation (NRF)
Plant Science
MSc
Unrestricted
Yu, Xiaozhang, e 于曉章. "Uptake, assimilation and toxicity of cyanogenic compounds in plants". Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2009. http://hub.hku.hk/bib/B41634159.
Testo completoLaverty, Edward. "The molecular basis of gene expression variability in transgenic tobacco plants". Thesis, Durham University, 1996. http://etheses.dur.ac.uk/5238/.
Testo completoRawahy, Salim Ali 1951. "EFFECT OF SODIUM-CHLORIDE, SODIUM-SULFATE AND CALCIUM-CHLORIDE SALTS ON NITROGEN AND PHOSPHORUS UPTAKE BY TOMATO PLANTS (SALINITY, OSMOTIC PRESSURE, SPECIFIC ION EFFECT)". Thesis, The University of Arizona, 1986. http://hdl.handle.net/10150/275527.
Testo completoBao, Jiao Lin. "The antitumor effect of Forsythiae Fructus and its underlying mechanisms". Thesis, University of Macau, 2017. http://umaclib3.umac.mo/record=b3690828.
Testo completoCooke, Susan Jill. "The effect of plant UV-B absorbing compounds on life history traits and reproductive performance in variable UV-B environments". Morgantown, W. Va. : [West Virginia University Libraries], 1999. http://etd.wvu.edu/templates/showETD.cfm?recnum=620.
Testo completoTitle from document title page. Document formatted into pages; contains x, 130 p. : ill. Vita. Includes abstract. Includes bibliographical references.
Leeson, Elspeth A. "The effect of low temperatures on some species of Chlamydomonas and Chloromonas". Thesis, Open University, 1989. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.236229.
Testo completoTront, Jacqueline Marie. "Plant Activity and Organic Contaminant Processing by Aquatic Plants". Diss., Georgia Institute of Technology, 2004. http://hdl.handle.net/1853/5234.
Testo completoTickes, Barry, e Mike Ottman. "The Effect of Phosphorus on Alfalfa Yield". College of Agriculture, University of Arizona (Tucson, AZ), 1992. http://hdl.handle.net/10150/201366.
Testo completoWongareonwanakij, Sathaporn. "Effects of water stress and partial soil-drying on senescence of sunflower plants". Title page, contents and summary only, 1995. http://web4.library.adelaide.edu.au/theses/09A/09aw872.pdf.
Testo completoLarsson, Marie-France. "The Effect of Plants on Individuals' Stress Level in an Indoor Work Environment". Thesis, Mid Sweden University, Department of Social Sciences, 2010. http://urn.kb.se/resolve?urn=urn:nbn:se:miun:diva-11141.
Testo completoMany instances of sick leave can be linked to diseases caused by stress. An efficient way to counter the negative effects of stress is coping. However, trying to fit coping activities into an already busy schedule can be stressful in itself. Therefore it is interesting to study passive stress-reducing methods, for instance interaction with nature. This paper studied the effect of the presence of plants in a work-like environment on the stress level of 30 participants divided equally in a control group and a test group by measuring their heart rate. A factorial analysis of variance and a multivariate analysis of variance were used to analyze the data. Despite the heart rate of the control group being on an average 5 beats per minute higher than the test group, the difference was found not to be statistically significant. An explanation for this could be the poor reliability of heart rate as a measure of stress.
Keywords: coping, heart rate, indoors, nature, plants, stress, work
Hoff, Ellen Torsæter. "The Effect of Restoration Treatments on the Regeneration Pathway in Alpine Seed Plants". Thesis, Norges teknisk-naturvitenskapelige universitet, Institutt for biologi, 2011. http://urn.kb.se/resolve?urn=urn:nbn:no:ntnu:diva-15692.
Testo completoBadiwe, Mihlali. "Effect of Fusarium oxysporum on the physiological and molecular responses of cowpea plants". The University of the Western Cape, 2017. http://hdl.handle.net/11394/5793.
Testo completoCowpea is a tropical, drought-tolerant legume crop that is indigenous to Africa. The crop is of nutritional importance to both animals and humans as part of their diet. Stress to crop plants is defined as any factor that negatively influences the growth and reproduction of a plant below the capabilities of the genotype.
Bezuidenhout, Johannes Jacobus. "Elucidating the dual physiological induced effect of gliotoxin on plants / Johannes Jacobus Bezuidenhout". Thesis, North-West University, 2011. http://hdl.handle.net/10394/6945.
Testo completoThesis (Ph.D. (Microbiology))--North-West University, Potchefstroom Campus, 2012.
Aslin, Christopher M. "The effect of speciation on cadmium uptake and resultant phytochelatin synthesis in plants". Thesis, Kingston University, 1997. http://eprints.kingston.ac.uk/20602/.
Testo completoHillenbrand-Nowicki, Cathy. "The effect of plants on human perceptions and behavior within an interior atrium". Thesis, Virginia Tech, 1993. http://hdl.handle.net/10919/41917.
Testo completoMaster of Science
Deka, Priyanka. "The Effect of Zinc Oxide Nanoparticles on Plants, and on Host-Pathogen Interactions". Diss., North Dakota State University, 2019. https://hdl.handle.net/10365/29270.
Testo completoUSDA-NIFA
National Science Foundation (NSF)
Chappelka, Arthur H. "The combined effects of ozone, sulfur dioxide and simulated acid rain on the growth of three forest tree species". Diss., Virginia Polytechnic Institute and State University, 1986. http://hdl.handle.net/10919/74726.
Testo completoPh. D.
Zhang, Chao. "Anti-liver cancer effect of polyphyllin VII and its molecular mechanisms". Thesis, University of Macau, 2017. http://umaclib3.umac.mo/record=b3690802.
Testo completoGenc, Yusuf. "Screening for zinc efficiency in barley (Hordeum vulgare L.)". Title page, table of contents and summary only, 1999. http://web4.library.adelaide.edu.au/theses/09PH/09phg324.pdf.
Testo completoGillman, Michael Philip. "The effect of grazing by gastropods on vegetation dynamics in early secondary succession". Thesis, University of Southampton, 1987. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.253228.
Testo completo