The investigation of EPR paramagnetic probe line width and shape temperature dependence in high-temperature superconductors of Bi–Pb–Sr–Ca–Cu–O system

The work is related with the finding out of magnetic phases in strongly anisotropic high-temperature superconductor Bi1,7Pb0,3Sr2Ca2Cu3O10-δ in the temperature region where the superconductor is in the normal state. It was studied the temperature dependence of the paramagnetic probe EPR line width. In the normal state at T\u3eTc near 175 K it was revealed a pick in the temperature dependence of line width. In this region it was observed the time increase of the line width with the characteristic time ~ 17 min. This shows the possibility of magnetic phase formation in this material

Два случая трансформации миастении в боковой амиотрофический склероз

A72-year old woman and 38-year old man had clinical sings of myasthenia gravis with ptosis and double vision, speech, swallowing, face and limb weakness. They was diagnosed MG after tensilon test, responding to piridostigmine and prednisolon treatment, neuromusculardisorders and positive anti-AchR and titin antibodies. Four and 7 year ago after debut of myasthenia gravis they had clinical and electrophysiological symptoms of amyotrophic lateral sclerosis.Описаны 2 случая трансформации миастении в боковой амиотрофический склероз (БАС). У 72-летней женщины и 38-летнего мужчины выявлены достоверные клинические признаки генерализованной миастении, с наличием глазодвигательных расстройств и птоза, нарушением бульбарных функций, слабостью мышц лица и конечностей. Диагноз миастении подтверждался результатами фармакологического теста, электромиографического (ЭМГ) тестирования нервно-мышечной передачи, повышением концентрации аутоантител к ацетилхолиновому рецептору, титин-протеину, а также эффектом глюкокортикоидной терапии и тимэктомии. У обоих пациентов в интервале от 4 до 7 лет от начала болезни появились ЭМГ- и клинические симптомы БАС

Enhancing Production of Bio-Isoprene Using Hybrid MVA Pathway and Isoprene Synthase in E. coli

The depleting petroleum reserve, increasingly severe energy crisis, and global climate change are reigniting enthusiasm for seeking sustainable technologies to replace petroleum as a source of fuel and chemicals. In this paper, the efficiency of the MVA pathway on isoprene production has been improved as follows: firstly, in order to increase MVA production, the source of the “upper pathway” which contains HMG-CoA synthase, acetyl-CoA acetyltransferase and HMG-CoA reductase to covert acetyl-CoA into MVA has been changed from Saccharomyces cerevisiae to Enterococcus faecalis; secondly, to further enhance the production of MVA and isoprene, a alanine 110 of the mvaS gene has been mutated to a glycine. The final genetic strain YJM25 containing the optimized MVA pathway and isoprene synthase from Populus alba can accumulate isoprene up to 6.3 g/L after 40 h of fed-batch cultivation