نتایج جستجو برای: bioavailable

تعداد نتایج: 3626  

Journal: :Nature Energy 2020

2012
Renn Sterling Lambert Martin Auer

•Plot of sample P richness vs. Bioavailable particulate P (PP). •Slope suggests from that PP is 35% bioavailable • This is not always the case two point were not included in the regression Bioavailable P Contributions •Results of all assays are presented in the table. •If the fraction of bioavailable P (fbio) is known then the contributions of each P form can change dramatically. •Contributions...

Journal: :The Journal of clinical endocrinology and metabolism 1999
E Barrett-Connor D G Von Mühlen D Kritz-Silverstein

A cross-sectional population-based study examined the association between endogenous sex hormones and depressed mood in community-dwelling older men. Participants included 856 men, ages 50-89 yr, who attended a clinic visit between 1984-87. Total and bioavailable testosterone, total and bioavailable estradiol, and dihydrotestosterone levels were measured by radioimmunoassay in an endocrinology ...

2017
Chenguang Li Peizhan Chen Xiaohua Duan Jing Wang Bing Shu Xiaoguang Li Qian Ba Jingquan Li Yongjun Wang Hui Wang

Total 25(OH)D levels were determined to assess bone health in elderly populations; however, the bioavailability of 25(OH)D is regulated by the albumin and vitamin D binding protein (DBP) levels and DBP variations. Whether bioavailable 25(OH)D level is a superior biomarker for vitamin D than total 25(OH)D level regarding the BMD and the bone metabolism were not yet fully understood. With a commu...

2016
Greg Tsang Michael B. Insel Justin M. Weis Mary Anne M. Morgan Michael S. Gough Lauren M. Frasier Cynthia M. Mack Kathleen P. Doolin Brian T. Graves Michael J. Apostolakos Anthony P. Pietropaoli

BACKGROUND Experimental studies demonstrate beneficial immunological and hemodynamic effects of estradiol in animal models of sepsis. This raises the question whether estradiol contributes to sex differences in the incidence and outcomes of sepsis in humans. Yet, total estradiol levels are elevated in sepsis patients, particularly nonsurvivors. Bioavailable estradiol concentrations have not pre...

2012
Gianniantonio Petruzzelli Francesca Pedron Meri Barbafieri Eliana Tassi Francesca Gorini Irene Rosellini

Despite the numerous articles appearing in scientific journals, very few field applications of phytoextraction have been successfully realized. To overcome the imbalance between the technology’s potential and its drawbacks, there is growing interest in the use of plants to reduce only the fraction that is the most hazardous to the environment and human health, that is to target the bioavailable...

Journal: :Annual review of marine science 2009
Natalie M Mahowald Sebastian Engelstaedter Chao Luo Andrea Sealy Paulo Artaxo Claudia Benitez-Nelson Sophie Bonnet Ying Chen Patrick Y Chuang David D Cohen Francois Dulac Barak Herut Anne M Johansen Nilgun Kubilay Remi Losno Willy Maenhaut Adina Paytan Joseph M Prospero Lindsey M Shank Ronald L Siefert

Atmospheric inputs of iron to the open ocean are hypothesized to modulate ocean biogeochemistry. This review presents an integration of available observations of atmospheric iron and iron deposition, and also covers bioavailable iron distributions. Methods for estimating temporal variability in ocean deposition over the recent past are reviewed. Desert dust iron is estimated to represent 95% of...

Journal: :American journal of epidemiology 1998
R L Ferrini E Barrett-Connor

The role of endogenous sex hormones in many diseases makes understanding factors that influence levels of these hormones increasingly important. This study examined age-associated variations in total and bioavailable testosterone and estradiol levels among community-dwelling Caucasian men in Rancho Bernardo, California. Plasma samples obtained from 810 men aged 24-90 years in 1984-1987 were ana...

2012
Ishir Bhan Camille E. Powe Anders H Berg Elizabeth Ankers Julia Wenger S. Ananth Karumanchi Ravi Thadhani

Prior studies showed conflicting results regarding the association between 25-hydroxyvitamin D (25(OH)D) levels and mineral metabolism in end-stage renal disease. In order to determine whether the bioavailable vitamin D (that fraction not bound to vitamin D-binding protein) associates more strongly with measures of mineral metabolism than total levels, we identified 94 patients with previously ...

Journal: :Journal of environmental quality 2004
L Schroder N T Basta S W Casteel T J Evans M E Payton J Si

The effect of the dosing vehicle (e.g., dough) on the ability of an in vitro gastrointestinal (IVG) method to predict relative bioavailable Pb associated with soil ingestion was evaluated. Bioaccessible Pb determined by the IVG method was compared with relative bioavailable Pb measured from dosing trials using juvenile swine for 18 contaminated soils ranging from 1270 to 14200 mg Pb kg(-1). Bio...

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