Publications by authors named "Qiong Qiu Qian"
[Nondestructive measurement of cellular ATP contents in vegetables using UV-Vis-NIR spectroscopy].
Guang Pu Xue Yu Guang Pu Fen Xi
April 2012
Article Synopsis
- The cellular ATP content in agricultural products can indicate their freshness and quality, making it a potential measure for storage assessment.
- Spectral data for spinach leaves were collected using a UV-Vis-NIR spectrophotometer, and ATP levels were measured through firefly luciferase bioluminescence technology.
- Key wavelengths (298 nm and 730 nm) were identified for estimating ATP content in spinach protoplasts, with high correlation efficiencies (R² = 0.8029 and 0.901), offering a quick and non-destructive method for evaluating vegetable freshness.
[Effect of hyperbaric oxygen treatment on mitochondrial free radicals after transient focal cerebral ischemia in rats].
Zhejiang Da Xue Xue Bao Yi Xue Ban
September 2008
Objective: To investigate the effect of hyperbaric oxygen(HBO)therapy on mitochondrial free radicals after transient focal cerebral ischemia in rats.
Methods: The male SD rats were randomly assigned into two groups, control and HBO groups. All animals were subjected to 90 min intra-luminal middle cerebral artery occlusion (MCAO) with the regional cerebral blood flow monitored in vivo by laser Doppler flowmetry.
Leaf senescence is often caused by water deficit and the chimeric gene P(SAG12)-IPT is an auto-regulated gene delaying leaf senescence. Using in vitro leaf discs culture system, the changes of contents of chlorophylls, carotenoids, soluble protein and thiobarbituric acid reactive substance (TBARS) and antioxidant enzymes activities were investigated during leaf senescence of P(SAGl2)-IPT modified gerbera induced by osmotic stress compared with the control plant (wild type). Leaf discs were incubated in 20%, 40% (w/v) polyethylene glycol (PEG) 6000 nutrient solution for 20 h under continuous light [130 micromol/(m(2) x s)].
View Article and Find Full Text PDF[Effects of exogenous silicon on active oxygen scavenging systems in chloroplasts of cucumber (Cucumis sativus L.) seedlings under salt stress].
Zhi Wu Sheng Li Yu Fen Zi Sheng Wu Xue Xue Bao
February 2006
Article Synopsis
- The study explored how treatment with K(2)SiO(4) influenced cucumber leaves under salt stress, specifically looking at how silicon affects the distribution of sodium (Na(+)) and potassium (K(+)) in chloroplasts.
- It was found that Si treatment led to a selective increase in K(+) levels in chloroplasts while reducing Na(+) content.
- Additionally, the antioxidant system in the chloroplasts improved, with lower levels of harmful substances like H(2)O(2) and MDA, and enhanced activity of antioxidant enzymes, suggesting that silicon helps protect cucumber plants from salinity damage.
A hydroponic experiment was carried out to study the genotypic difference in subcellular distribution and chemical form of Cd and Zn uptake and their interaction in four barley genotypes. Increased Cd level in the medium caused a significant increase of Cd concentration in all fractions of roots/shoots, with most accumulation in FI (cell wall) and FIV (soluble). In root, the greatest amount of Cd was found in extraction solution of 2% HAC or 0.
View Article and Find Full Text PDFFourteen cultivars of bai cai (Brassica campestris L. ssp. chinensis var.
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