نتایج جستجو برای: b12

تعداد نتایج: 8822  

Journal: :Maternal & child nutrition 2014
Sambashivaiah Sucharita Pratibha Dwarkanath Tinku Thomas Krishnamachari Srinivasan Anura V Kurpad Mario Vaz

Vitamin B12 plays a vital role in neuronal development, particularly in myelinogenesis. Demyelination of the autonomic nervous system occurs early in vitamin B12 deficiency. However, the impact of maternal vitamin B12 deficiency during pregnancy on neuronal function in the offspring is poorly documented. The objective of this study was to assess cardiac autonomic nervous activity in children bo...

2014
Shaonong Dang Hong Yan Lingxia Zeng Quanli Wang Qiang Li Shengbin Xiao Xiaojing Fan

OBJECTIVE To assess the status of the vitamin B12 and folate of Chinese women living in northwest China. METHODS A population-based cross-sectional study was conducted in 2008 among Chinese women aged 10-49 years living in Shaanxi province of northwest China. A stratified multistage random sampling method was adopted to obtain a sample of 1170 women. The women were interviewed for collection ...

2014
Yousef Mohammed Byong Lee Zhen Kang Guocheng Du

BACKGROUND Vitamin B12 is a fascinating molecule which acts as a co-factor in the metabolism of many organisms, especially affecting DNA synthesis and regulation, fatty acid synthesis and energy production. The synthesis of vitamin B12 is limited to a few of bacteria and archaea. Therefore, industrial microbial fermentation is used to meet annual demands worldwide of vitamin B12 and as an alter...

ژورنال: :مجله پزشکی ارومیه 0
مریم سبکتکین maryam saboktakin faculty of health and nutrition, nutritional research center, tabriz university of medical sciences, tabriz, iranدانشکده بهداشت و تغذیه، مرکز تحقیقات تغذیه، دانشگاه علوم پزشکی تبریزسازمان اصلی تایید شده: دانشگاه علوم پزشکی تبریز (tabriz university of medical sciences) بهرام پورقاسم گرگری bahram pourghassem gargari faculty of health and nutrition, nutritional research center, tabriz university of medical sciences, tabriz, iranدانشکده بهداشت و تغذیه، مرکز تحقیقات تغذیه، دانشگاه علوم پزشکی تبریزسازمان اصلی تایید شده: دانشگاه علوم پزشکی تبریز (tabriz university of medical sciences) دکتر سلطانعلی محبوب soltan ali mahboob faculty of health and nutrition, nutritional research center, tabriz university of medical sciences, tabriz, iranبیوشیمی - تغذیه، دانشکده بهداشت و تغذیه، مرکز تحقیقات تغذیه، دانشگاه علوم پزشکی تبریزسازمان اصلی تایید شده: دانشگاه علوم پزشکی تبریز (tabriz university of medical sciences) نصرت اله پورافکاری nosratollah pourafkari faculty of medicine, tabriz university of medical sciences, tabriz, iranروانپزشکی، دانشکده پزشکی، بیمارستان رازی تبریز، دانشگاه علوم پزشکی تبریزسازمان اصلی تایید شده: دانشگاه علوم پزشکی تبریز (tabriz university of medical sciences)

مریم سبکتکین [1] ، دکتر بهرام پورقاسم گرگری [2] ، دکتر سلطانعلی محبوب [3] ، دکتر نصرت اله پورافکاری [4] تاریخ دریافت 26/2/86، تاریخ پذیرش 23/8/86   چکیده پیش زمینه و هدف: فولات و ویتامین b12 برای عملکرد طبیعی سیستم عصبی ضروری می­باشند. نتایج مطالعات انجام شده در مورد ارتباط بین افسردگی اساسی با این ویتامین ­ ها متناقض است. در ایران تاکنون مطالعه­ای جهت بررسی وضعیت دریافت اسیدفولیک و ویتامین b12...

Journal: :Turkish journal of haematology : official journal of Turkish Society of Haematology 2011
Ayşe Tosun Yusuf Ziya Aral Emre Çeçen Ayvaz Aydoğdu Bilin Çetinkaya Çakmak

Megaloblastic anemia is rare in infants and is generally due to vitamin B12 (cobalamin) deficiency in the mother. Neurologic symptoms of vitamin B12 deficiency include irritability, failure to thrive, hypotonia, and developmental regression/delay. Herein we present 2 infants with vitamin B12 that developed movement disorder 5 d after initiation of vitamin B12 treatment. Symptoms included tremor...

Journal: :Bioscience, biotechnology, and biochemistry 2007
Masahiro Hayashi Tsugiyo Yukino Fumio Watanabe Emi Miyamoto Yoshihisa Nakano

Newly isolated thraustochytrids showed uptake of vitamin B12 from the culture into the cells. Cultivation of thraustochytrids in a medium containing 1 microg/ml of vitamin B12 greatly increased the contents of vitamin B12 in the cells. Similarly to Schizochytrium limacinum, odd numbered fatty acids decreased in the cells of new isolates cultivated with vitamin B12. Vitamin B12-enriched thrausto...

2010
D. Sean Froese Roy A. Gravel

Vitamin B12 (cobalamin, Cbl) is an essential nutrient in human metabolism. Genetic diseases of vitamin B12 utilisation constitute an important fraction of inherited newborn disease. Functionally, B12 is the cofactor for methionine synthase and methylmalonyl CoA mutase. To function as a cofactor, B12 must be metabolised through a complex pathway that modifies its structure and takes it through s...

2006
C. C. BOOTH

Several observations suggest that the absorption of vitamin B12 may be inhibited by bacteria. Both in experimental animals and in patients with blind loops, strictures, or fistulae involving the small intestine, heavy growths of bacteria have been found in areas of the bowel which are normally sterile (Seyderhelm, Lehmann, and Wichels, 1924; Doig and Girdwood, 1960). In patients with such lesio...

2010
Steven F Werder

INTRODUCTION Although consensus guidelines recommend checking serum B12 in patients with dementia, clinicians are often faced with various questions: (1) Which patients should be tested? (2) What test should be ordered? (3) How are inferences made from such testing? (4) In addition to serum B12, should other tests be ordered? (5) Is B12 deficiency compatible with dementia of the Alzheimer's typ...

Journal: :Blood 1958
R S MENDELSOHN D M WATKIN A P HORBETT J L FAHEY

By ROBERT S. MENDELSOIIN, DONALD M. WATKIN, ANN P. HORBETr AND J OHN L. FAHEY R ECENT STUDIES have demonstrated that virtually all the vitamin B12 in normal serum is bound to serum proteins.1 In chronic myelocytic leukemia tile serum B12 concentration may be increased from 2 to 30 times normal levels.24 At these increased levels, all or almost all of the B12 is protein-bound. However, normal se...

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