Journal ArticleDOI
Effect of nano-TiO2 on photochemical reaction of chloroplasts of spinach.
TLDR
It is suggested that photosynthesis promoted by nano-TiO2 might be related to activation of photochemical reaction of chloroplasts of spinach.Abstract:
The effects of nano-TiO2 (rutile) on the photochemical reaction of chloroplasts of spinach were studied. The results showed that when spinach was treated with 0.25% nano-TiO2, the Hill reaction, such as the reduction rate of FeCy, and the rate of evolution oxygen of chloroplasts was accelerated and noncyclic photophosphorylation (nc-PSP) activity of chloroplasts was higher than cyclic photophosphorylation (c-PSP) activity, the chloroplast coupling was improved and activities of Mg2+-ATPase and chloroplast coupling factor I (CF1)-ATPase on the thylakoid membranes were obviously activated. It suggested that photosynthesis promoted by nano-TiO2 might be related to activation of photochemical reaction of chloroplasts of spinach.read more
Citations
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Occurrence, behavior and effects of nanoparticles in the environment.
Bernd Nowack,Thomas D. Bucheli +1 more
TL;DR: This review presents an overview of the classes of NP relevant to the environment and summarizes their formation, emission, occurrence and fate in the environment.
Journal ArticleDOI
Phytotoxicity of nanoparticles: Inhibition of seed germination and root growth
Daohui Lin,Baoshan Xing +1 more
TL;DR: Effects of five types of nanoparticles on seed germination and root growth of six higher plant species were investigated and inhibition on root growth varied greatly among nanoparticles and plants.
Journal ArticleDOI
Nanoparticulate material delivery to plants
TL;DR: The delivery of nanoparticulate materials to plants and their ultimate effects are reviewed to provide some insights for the safe use of this novel technology for the improvement of crops.
Journal ArticleDOI
Interaction of nanoparticles with edible plants and their possible implications in the food chain
Cyren M. Rico,Sanghamitra Majumdar,Maria Duarte-Gardea,Jose R. Peralta-Videa,Jorge L. Gardea-Torresdey +4 more
TL;DR: The uptake, bioaccumulation, biotransformation, and risks of nanomaterials (NMs) for food crops are still not well understood and the possible biomagnification of NPs in the food chain is unknown.
Journal ArticleDOI
Root uptake and phytotoxicity of ZnO nanoparticles.
Daohui Lin,Baoshan Xing +1 more
TL;DR: The phytotoxicity of ZnO nanoparticles was not directly from their limited dissolution in the bulk nutrient solution or rhizosphere, implying that little (if any) Zn O nanoparticles could translocate up in the ryegrass in this study.
References
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Journal ArticleDOI
Copper enzymes in isolated chloroplasts. polyphenoloxidase in beta vulgaris
TL;DR: Evidence that a copper enzyme, polyphenoloxidase (otherwise known as tyrosinase or catecholase), is localized in the chloroplasts of spinach beet (chard), Beta vu?garis is presented.
Book ChapterDOI
Assay of inorganic phosphate, total phosphate and phosphatase
TL;DR: The method is about seven times as sensitive as the Fiske–SubbaRow procedure and involves less pipetting, but it is not very satisfactory for determining inorganic phosphate if labile phosphate esters are present in large excess.
Journal ArticleDOI
Effect of nano-TiO(2) on strength of naturally aged seeds and growth of spinach.
TL;DR: It is shown that the physiological effects are related to the nanometer-size particles, but the mechanism by which nano-TiO2 improves the growth of spinach seeds still needs further study.
Journal ArticleDOI
Partial resolution of the enzymes catalyzing photophosphorylation. 3. Activation of adenosine triphosphatase and 32P-labeled orthophosphate -adeno-sine triphosphate exchange in chloroplasts.
Richard E. McCarty,Efraim Racker +1 more
TL;DR: Results show that dithiothreitol modifies the coupling factor in situ, and this is likely to be in part responsible for the activation of Mg++-dependent ATPase and of 32Pi-ATP exchange.
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A New Type of Hydrogen Bond
TL;DR: Crabtree as mentioned in this paper discusses recent work in which entirely new kinds of hydrogen bonds have been discovered and discusses how to control these new types of bonding may enable researchers to harness a variety of important catalytic processes.
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