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Santosh Kumar Sar Vijita Diwan Supriya Biswas Shweta Singh Megha Sahu Manoj Kumar Jindal 《人类与生态风险评估》2018,24(3):691-698
Uranium contamination in groundwater at Balod district of Chhattisgarh state was measured by laser fluorimetric technique. Most of the samples were found under safe limit for uranium contamination as recommended by WHO and USEPA (<30 µg l?1) except Deur Tarai village (78.93 µg l?1).The excess lifetime carcinogenic risk and chemical risk due to ingestion of groundwater were calculated using USEPA recommendations. 相似文献
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Sodium chloride induced changes in leaf growth, and pigment and protein contents in two rice cultivars 总被引:2,自引:0,他引:2
A.N. Misra S.M. Sahu M. Misra P. Singh I. Meera N. Das M. Kar P. Sahu 《Biologia Plantarum》1997,39(2):257-262
Rice (Oryza sativa L.) seedlings were grown under NaCl stress. The leaf growth of resistant cv. Damodar was less affected
than that of the susceptible cv. Jaya. The leaf protein content showed no distinct cultivar or age dependent differences under
NaCl salinity. There was a significant increase in chlorophyll (Chl) and carotenoid (Car) contents of 25-d-oldseedlings of
both cv. Jaya and cv. Damodar. However, Chl and Car content of 15-d-old seedlings of cv. Jaya decreased and that of cv. Damodar
increased, under NaCl stress.
This revised version was published online in July 2006 with corrections to the Cover Date. 相似文献
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We present a nuclear magnetic resonance (NMR) study in solution of the structures of human normal hemoglobin (Hb A) in the deoxy or unligated form in the absence and presence of an allosteric effector, inositol hexaphosphate (IHP), using 15N-1H residual dipolar coupling (RDC) measurements. There are several published crystal structures for deoxyhemoglobin A (deoxy-Hb A), and it has been reported that the functional properties of Hb A in single crystals are different from those in solution. Carbonmonoxyhemoglobin A (HbCO A) can also be crystallized in several structures. Our recent RDC studies of HbCO A in the absence and presence of IHP have shown that the solution structure of this Hb molecule is distinctly different from its classical crystal structures (R and R2). To have a better understanding of the structure-function relationship of Hb A under physiological conditions, we need to evaluate its structures in both ligated and unligated states in solution. Here, the intrinsic paramagnetic property of deoxy-Hb A has been exploited for the measurement of RDCs using the magnetic-field dependence of the apparent one-bond 1H-15N J couplings. Our RDC analysis suggests that the quaternary and tertiary structures of deoxy-Hb A in solution differ from its recently determined high-resolution crystal structures. Upon binding of IHP, structural changes in deoxy-Hb A are also observed, and these changes are largely within the alpha1beta1 (or alpha2beta2) dimer itself. These new structural findings allow us to gain a deeper insight into the structure-function relationship of this interesting allosteric protein. 相似文献
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