نتایج جستجو برای: sungun copper plant

تعداد نتایج: 474637  

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه شهید باهنر کرمان 1388

copper extraction from heap 3 low grade ore at sarchechmeh is limited due to its mixed composition (copper oxide and sulphide minerals). changing this heap to a bioheap could improve the copper recovery.

2016
Bruno Printz Gea Guerriero Kjell Sergeant Jean-Nicolas Audinot Cédric Guignard Jenny Renaut Stanley Lutts Jean-Francois Hausman

Copper can be found in the environment at concentrations ranging from a shortage up to the threshold of toxicity for plants, with optimal growth conditions situated in between. The plant stem plays a central role in transferring and distributing minerals, water and other solutes throughout the plant. In this study, alfalfa is exposed to different levels of copper availability, from deficiency t...

2012
P. Karimi R. A. Khavari-Nejad V. Niknam F. Ghahremaninejad F. Najafi

To probe the physiological and biochemical tolerance mechanisms in Astragalus neo-mobayenii Maassoumi, an endemic plant around the Cu-rich areas from the North West of Iran, the effect of different copper concentrations at toxic levels on this plant was investigated. Copper was applied in the form of copper sulfate (CuSO₄·5H₂O) in four levels (0, 50, 100, and 150 μM). We observed no visible sym...

Journal: :Journal of experimental botany 2014
Junichiro Iwase Hiroka Furukawa Takuya Hiramatsu François Bouteau Stefano Mancuso Kenichiro Tanaka Toshihiko Okazaki Tomonori Kawano

The impact of copper ions on the oxidative and calcium signal transductions, leading to cell death in plant cells, have been documented. Copper induces a series of biological and chemical reactions in plant cells including the oxidative burst reflecting the production of reactive oxygen species and the stimulation of calcium channel opening allowing a transient increase in cytosolic calcium con...

Journal: :Biochemical Society transactions 2002
H Wintz C Vulpe

Copper chaperones, soluble copper-binding proteins, are essential for ensuring proper distribution of copper to cellular compartments and to proteins requiring copper prosthetic groups. They are found in all eukaryotic organisms. Orthologues of the three copper chaperones characterized in yeast, ATX1, CCS and COX17, are present in Arabidopsis thaliana. Plants are faced with unique challenges to...

Journal: :Zeitschrift fur Naturforschung. C, Journal of biosciences 2009
Tomoko Kagenishi Ken Yokawa Masaki Kuse Minoru Isobe François Bouteau Tomonori Kawano

Impact of copper on the oxidative and calcium signal transductions leading to cell death in plant cells and the effects of the copper-binding peptide derived from the human prion protein (PrP) as a novel plant-protecting agent were assessed using a cell suspension culture of transgenic tobacco (Nicotiana tabacum L., cell line BY-2) expressing the aequorin gene. Copper induces a series of biolog...

2015
Lola Peñarrubia Paco Romero Angela Carrió-Seguí Amparo Andrés-Bordería Joaquín Moreno Amparo Sanz

To cope with the dual nature of copper as being essential and toxic for cells, plants temporarily adapt the expression of copper homeostasis components to assure its delivery to cuproproteins while avoiding the interference of potential oxidative damage derived from both copper uptake and photosynthetic reactions during light hours. The circadian clock participates in the temporal organization ...

Journal: :Bioresource technology 2011
Wenbing Zhou Xuan Ge Duanwei Zhu Alan Langdon Li Deng Yumei Hua Jianwei Zhao

The FTIR spectra, SEM-EDXA and copper adsorption capacities of the raw plant materials, alkali-treated straws and cellulose xanthogenate derivatives of Eichhornia crassipes shoot, rape straw and corn stalk were investigated. FTIR spectra indicated that of the three plant materials, the aquatic biomass of E. crassipes shoot contained more OH and CO groups which accounted for the higher Cu(2+) ad...

The life cycle cost of a system is influenced by its maintainability. Maintainability is a design parameter, whose operational conditions can affect it significantly. Hence, the effects of these operational conditions should be quantified early in the design phase. The proportional repair model (PRM), which is developed based on the proportional hazard model (PHM), can be used to analyze mainta...

2005
Inmaculada Yruela

Copper is an essential metal for normal plant growth and development, although it is also potentially toxic. Copper participates in numerous physiological processes and is an essential cofactor for many metalloproteins, however, problems arise when excess copper is present in cells. Excess copper inhibits plant growth and impairs important cellular processes (i.e., photosynthetic electron trans...

نمودار تعداد نتایج جستجو در هر سال

با کلیک روی نمودار نتایج را به سال انتشار فیلتر کنید