نتایج جستجو برای: selenium nanoparticle

تعداد نتایج: 45560  

احرامپوش, محمد حسن, سلمانی ندوشن, محمد حسین, عسکرشاهی, محسن, وکیلی, محمود,

Introduction: Metal ions are required for various vital body functions and metabolism. Selenium is an active element in selenoproteins and plays an important role in public health, though the increase of its concentration in the body can cause toxicity. Therefore, it seems essential to investigate the serum selenium status of individuals of a society. This study was conducted to determine serum...

Journal: :پژوهش های زراعی ایران 0
نورعلی ساجدی اسماعیل قلی نژاد

in order to study the effects of salicylic acid and selenium application on yield and yield components of rainfed wheat cultivars, a field experimental was carried out as factorial based on randomized complete block design with four replications in the research station of islamic azad university- arak branch, iran in 2010-2011 growing season. the treatments were salicylic acid and selenium. sal...

1998
Clement Ip

The article reviews the progress in basic research of selenium and cancer prevention during the past decade. Special emphasis is placed on the following four major areas of discussion: 1) chemical forms of selenium and anticarcinogenic activity; 2) selenium-enriched food; 3) in vitro effects of selenite vs. monomethylated selenium; and 4) aromatic selenium compounds. It is clear that basic rese...

Journal: :medical journal of islamic republic of iran 0
aram rostami department of medical physics, faculty of medicine, iran university of medical sciences, tehran, iran.سازمان اصلی تایید شده: دانشگاه علوم پزشکی ایران (iran university of medical sciences) seyed akbar moosavi department of lab sciences, school of allied medicine, iran university of medical sciences, tehran, iran.سازمان اصلی تایید شده: دانشگاه علوم پزشکی ایران (iran university of medical sciences) vahid changizi department of technology of radiology and radiotherapy, school of allied medicine, tehran university of medical sciences, tehran, iran.سازمان اصلی تایید شده: دانشگاه علوم پزشکی تهران (tehran university of medical sciences) ali abbasian ardakani department of medical physics, faculty of medicine, iran university of medical sciences, tehran, iran.سازمان اصلی تایید شده: دانشگاه علوم پزشکی ایران (iran university of medical sciences)

background: critical macromolecules of cells such as dna are in exposure to damage of free radicals that induced from the interaction of ionizing radiation with biological systems. selenium and vitamin-e are natural compounds that have been shown to be a direct free radical scavenger. the aim of this study was to investigate the radioprotective effect of selenium and vitamin-e separately and sy...

2010
Saverio Stranges Sabina Sieri Marco Vinceti Sara Grioni Eliseo Guallar Martin Laclaustra Paola Muti Franco Berrino Vittorio Krogh

BACKGROUND Growing evidence raises concern about possible associations of high selenium exposure with diabetes in selenium-replete populations such as the US. In countries with lower selenium status, such as Italy, there is little epidemiological evidence on the association between selenium and diabetes. This study examined the prospective association between dietary selenium intake and risk of...

2016
Bo Yin

In recent years, the research on the relationship between selenium and exercise capacity has become a hot research topic. Selenium is a necessary trace element in human body. This paper aims to elaborate the chemical composition of selenium and biological effects, discuss the relationship between selenium supplement and exercise capacity, and then investigate the potential applications of selen...

Journal: :Applied and environmental microbiology 2011
Markus Lenz Boris Kolvenbach Benjamin Gygax Suzette Moes Philippe F X Corvini

Selenium-reducing microorganisms produce elemental selenium nanoparticles with particular physicochemical properties due to an associated organic fraction. This study identified high-affinity proteins associated with such bionanominerals and with nonbiogenic elemental selenium. Proteins with an anticipated functional role in selenium reduction, such as a metalloid reductase, were found to be as...

2004
Laura J Raymond

Measuring the amount of mercury present in the environment or food sources may provide an inadequate reflection of the potential for health risks if the protective effects of selenium are not also considered. Selenium's involvement is apparent throughout the mercury cycle, influencing its transport, biogeochemical exposure, bioavailability, toxicological consequences, and remediation. Likewise,...

2014
Irma M Puspitasari Rizky Abdulah Chiho Yamazaki Satomi Kameo Takashi Nakano Hiroshi Koyama

To establish guidelines for the selenium supplementation in radiotherapy we assessed the benefits and risks of selenium supplementation in radiotherapy. Clinical studies on the use of selenium in radiotherapy were searched in the PubMed electronic database in January 2013. Sixteen clinical studies were identified among the 167 articles selected in the initial search. Ten articles were observati...

Journal: :Folia biologica 2012
Monika Stepińska Emilia Mróz Jan Jankowski

The objective of this study was to determine the effect of dietary selenium source on the growth and development of turkey embryos, and egg hatchability. White broad-breasted BUT Big 6 turkeys (1800 females and 150 males) were placed under optimum management conditions. Turkey diets were supplemented with organic selenium, and in the other with inorganic selenium, in the amount of 0.3 ppm. Eggs...

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