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561.
Delia R. Bethell Anthony E. Pegg 《Biochemical and biophysical research communications》1981,102(1):272-278
When non-proliferating 3T3-L1 fibroblasts were stimulated to differentiate into adipose cells, there was a dramatic increase in the intracellular level of the polyamine, spermidine. Addition of α-difluoromethylornithine, an inhibitor of polyamine biosynthesis, depleted the cellular polyamines and prevented triglyceride accumulation and differentiation. The inhibitory effect of α-difluoromethylorinithine was completely abolished by provision of spermidine or putrescine. This suggests that polyamines are needed in the processes of differentiation as well as their established requirement for cell growth. 相似文献
562.
Early Prediction of Sepsis Incidence in Critically Ill Patients Using Specific Genetic Polymorphisms
Vlad Laurentiu David Muhammed Furkan Ercisli Alexandru Florin Rogobete Eugen S. Boia Razvan Horhat Razvan Nitu Mircea M. Diaconu Laurentiu Pirtea Ioana Ciuca Delia Horhat Florin George Horhat Monica Licker Sonia Elena Popovici Sonia Tanasescu Calin Tataru 《Biochemical genetics》2017,55(3):193-203
Several diagnostic methods for the evaluation and monitoring were used to find out the pro-inflammatory status, as well as incidence of sepsis in critically ill patients. One such recent method is based on investigating the genetic polymorphisms and determining the molecular and genetic links between them, as well as other sepsis-associated pathophysiologies. Identification of genetic polymorphisms in critical patients with sepsis can become a revolutionary method for evaluating and monitoring these patients. Similarly, the complications, as well as the high costs associated with the management of patients with sepsis, can be significantly reduced by early initiation of intensive care. 相似文献
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Opinion This is a series of contributions, expressing explicit opinions with regard to contemporary topics in limnology. These
texts will mostly be based on new books with a large impact, but can also refer to other currently debated topics. Documented
reactions to these contributions should be sent to the editor-in-chief; they will be considered for publication in subsequent
issues.
This revised version was published online in July 2006 with corrections to the Cover Date. 相似文献
566.
Three methods for determining the total biofilm amount in biphasic cultures have been compared: dry weight by filtration after solvent treatment, optical density with a biomass probe and protein content. The activity of the biofilm was estimated through mineral nitrogen consumption. Calculation of the coefficients of variation shows that these parameters could be used to characterise such a biofilm. The optical density by biomass probe was the most reliable one (repeatability <0.5%) to quantify total biofilm and a linear relation was verified against dry weight. © Rapid Science Ltd. 1998 相似文献
567.
Delia Marcu Grigore Damian Constantin Cosma Victoria Cristea 《Journal of biological physics》2013,39(4):625-634
The effects of gamma radiation are investigated by studying plant germination, growth and development, and biochemical characteristics of maize. Maize dry seeds are exposed to a gamma source at doses ranging from 0.1 to 1 kGy. Our results show that the germination potential, expressed through the final germination percentage and the germination index, as well as the physiological parameters of maize seedlings (root and shoot lengths) decreased by increasing the irradiation dose. Moreover, plants derived from seeds exposed at higher doses (≤0.5 kGy) did not survive more than 10 days. Biochemical differences based on photosynthetic pigment (chlorophyll a, chlorophyll b, carotenoids) content revealed an inversely proportional relationship to doses of exposure. Furthermore, the concentration of chlorophyll a was higher than chlorophyll b in both irradiated and non-irradiated seedlings. Electron spin resonance spectroscopy used to evaluate the amount of free radicals induced by gamma ray treatment demonstrates that the relative concentration of radiation-induced free radicals depends linearly on the absorbed doses. 相似文献
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