抗体遺伝子転写細胞の分化過程の解析 : 速度論による解析

Differential processes of immunoglobulin (Ig) gene-transcribing cells were investigated in the thymus of BALB/c male mice from neonatal to 40 weeks old. Both membrane-bound type IgM (IgM_m) and total IgM (IgM_t) transcriptions were detected by realtime PCR and the IgM_m/IgM_t ratios were determined. The ratio was approximately 1 to 1 week after the birth, and then decreased gradually following to age increase. Kinetics was applied in order to analyze the result with supposing that the transcription quantity was proportional to the cell number, that immature cells transcribing membrane-bound type IgM_m continued to be supplied from stem cells in vivo, and that the concentration of total cells transcribing IgM_t was unchanged in the thymus with age. Immature IgM_m cells were thought to differentiate either to ones transcribing secretory type IgM (IgM_s) or to other class 1g-transcribing by recombining heavy-chain genes. Theoretical values were in fair agreement with experimental values of log IgM_m/IgM_t on the first order concurrent reaction process and the rate constants for each process were determined

トクシマシ イシカイ ノ トウニョウビョウ タイサク

Tokushima City Medical Association has founded the committee for the means to prevent diabetesmellitus, because the mortality rate by diabetes mellitus in Tokushima Prefecture remainedranked first for 14 years from 1993 to 2006. It has enlightened a large number of people, such asdiabetic patients and candidates for diabetes, and also healthy citizens in Tokushima for preventingdiabetes mellitus. For this aim, Tokushima City Medical Association has made the home pagenamed Tokushima City Diabetic Network to show clearly the means to prevent diabetes mellitusfor the citizens. By this Web site, the citizens can get a correct knowledge about diabetes mellitus,a useful information about the treatments including exercises, diets and medications, and an informationabout medical institutions by utilizing the search page to receive a proper diabetic treatment.Tokushima City Medical Association held several events, such as Tokushima citizens’extension courses and diabetes forums for the citizens to understand diabetes mellitus clearly.Fortunately, in 2007, Tokushima got out of the first rank of diabetic mortality rate. TokushimaCity Medical Association will continue efforts to prevent diabetes mellitus by approaching the citizensof all ages from various aspects

Diatoms Grow Faster Using Ammonium in Rapidly Flushed Eutrophic Dokai Bay, Japan

The importance of the nitrogen source for phytoplankton growth in a highly eutrophic embayment, Dokai Bay, was investigated. The DIN concentration often exceeded 100 mu M of which 40-70\% was NH4+. During two incubation experiments, the natural assemblage of mainly diatoms took up NH4+ instead of NO3-. The growth of two Skeletonema species isolated in Dokai Bay were significantly faster on NH4+ (1.86 and 1.27 div. d(-1) respectively) than on NO3- (1.55 and 1.04 div. d(-1) respectively). Our re suits indicated that these diatoms could grow faster by using NH4+ compared to NO3- in this eutrophic bay