نتایج جستجو برای: zinc metaborate

تعداد نتایج: 73603  

Journal: :Laboratory animals 2001
H Ozpinar Abas T Bilal G Demirel

The effects of dietary zinc on zinc absorption and excretion were evaluated with six 12-week-old beagles. The dogs were fed a commercial dry food later supplemented with 2 and 4mg/kg of body weight per day of either zinc sulphate, zinc acetate or zinc oxide. The concentrations of zinc in the urine and faeces of all treatment groups were increased depending on the type of zinc salts and the dosa...

Journal: :Genetics 2009
Diana E Davis Hyun Cheol Roh Krupa Deshmukh Janelle J Bruinsma Daniel L Schneider James Guthrie J David Robertson Kerry Kornfeld

Zinc is essential for many cellular processes. To use Caenorhabditis elegans to study zinc metabolism, we developed culture conditions allowing full control of dietary zinc and methods to measure zinc content of animals. Dietary zinc dramatically affected growth and zinc content; wild-type worms survived from 7 microm to 1.3 mm dietary zinc, and zinc content varied 27-fold. We investigated cdf-...

Journal: :The Biochemical journal 2013
Ira Kukic Jeffrey K Lee Jessica Coblentz Shannon L Kelleher Kirill Kiselyov

Zinc is critical for a multitude of cellular processes, including gene expression, secretion and enzymatic activities. Cellular zinc is controlled by zinc-chelating proteins and by zinc transporters. The recent identification of zinc permeability of the lysosomal ion channel TRPML1 (transient receptor potential mucolipin 1), and the evidence of abnormal zinc levels in cells deficient in TRPML1,...

Journal: :The American journal of clinical nutrition 1999
L E Caulfield N Zavaleta A Figueroa

BACKGROUND Maternal zinc deficiency during pregnancy may be widespread among women in developing countries, but few data are available on whether prenatal zinc supplementation improves maternal and neonatal zinc status. OBJECTIVE We studied whether maternal zinc supplementation improved the zinc status of mothers and neonates participating in a supplementation trial in a shantytown in Lima, P...

2012
Akbar Badii Niloufar Nekouei Mohammad Fazilati Mohammad Shahedi Sajad Badiei

After iron deficiency, zinc deficiency is the major micronutrient deficiency in developing countries, and staple food fortification is an effective strategy to prevent and improve it among at-risk-populations. No action has been taken to reduce zinc deficiency via flour fortification so far in Iran, and little is known about the influence of zinc fortification of flour on serum zinc and the iro...

Journal: :Journal of bacteriology 2005
Kaneyoshi Yamamoto Akira Ishihama

Transcriptional response of Escherichia coli to extracellular zinc was studied using DNA microarray and S1 mapping assays. Addition of external zinc induced the expression of zinc exporter ZntA and inhibited the expression of zinc importer ZnuC. In the continuous presence of zinc, ZnuC repression took place at lower zinc concentrations than ZntA induction. The microarray assay indicated that th...

Journal: :Journal of the American College of Nutrition 2004
Jihye Kim Hee Young Paik Hyojee Joung Leslie R Woodhouse Shanji Li Janet C King

BACKGROUND Adjustments in zinc losses and absorption are thought to maintain zinc homeostasis with changes in intake, but the capacity to make these adjustments appears to be affected by aging. Zinc status of the individual may also influence adjustments in fractional zinc absorption. OBJECTIVE The purpose of this study was to compare the effects of changes in zinc status due to zinc suppleme...

2013
Yang Yang Xiao-Peng Jing Shou-Peng Zhang Run-Xia Gu Fang-Xu Tang Xiu-Lian Wang Yan Xiong Mei Qiu Xu-Ying Sun Dan Ke Jian-Zhi Wang Rong Liu

Zinc ions highly concentrate in hippocampus and play a key role in modulating spatial learning and memory. At a time when dietary fortification and supplementation of zinc have increased the zinc consuming level especially in the youth, the toxicity of zinc overdose on brain function was underestimated. In the present study, weaning ICR mice were given water supplemented with 15 ppm Zn (low dos...

Journal: :Cancer research 1988
A J Kraker G Krakower C F Shaw D H Petering J S Garvey

Host zinc deficiency halts the proliferation of the mouse Ehrlich ascites tumor. The major site of measurable cellular zinc depletion is a cytosolic zinc binding protein. This protein is characterized as a metallothionein on the basis of its presence as two isoproteins which behave on DEAE-Sephadex and in polyacrylamide gel electrophoresis like metallothioneins, the lack of protein absorbance a...

Journal: :Archives of disease in childhood 1989
Y Atalay A Arcasoy M Kürkçüoğlu

Zinc absorption was measured in 37 children with malnutrition using the oral zinc tolerance test (22.5 mg elementary zinc) and the results compared with those of a group of healthy control subjects. The increase in plasma zinc was significantly lower in patients with marasmic kwashiorkor than in the control group. The zinc tolerance test was, however, normal in marasmic patients. We conclude th...

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