نتایج جستجو برای: mineral elements

تعداد نتایج: 339462  

2005
G. Sivakumar K. W. Yu E. J. Hahn K. Y. Paek

Macro and micro-elements, carbon sources and elicitors play a central role during Panax ginseng hairy root growth, biomass and ginsenoside production and also influence numerous root developmental stages in largescale bioreactor culture. Due to the lack of biosynthetic nutrients and signalling-inducing nutrients, the regulatory role of mineral elements is not well understood. We have geneticall...

2005
Deirdre B. Gleeson Nicholas Clipson Karrie Melville Geoffrey M. Gadd Frank P. McDermott

This study exploited the contrasting major element chemistry of adjacent, physically separable crystals of framework and sheet silicates in a pegmatitic granite to investigate the mineralogical influences of fungal community structure on mineral surfaces. Large intact crystals of variably weathered muscovite, plagioclase, K-feldspar, and quartz were individually extracted, together with whole-r...

Journal: :پژوهش های تولید گیاهی 0
مهری مشایخی کارشناس ارشد دانشگاه سراسری زنجان محمد اسماعیل امیری دانشیار دانشگاه زنجان فریبرز حبیبی مربی دانشگاه زنجان

background and objectives: availability and uptake of mineral by explants are recognized as being important in tissue culture. the limiting factor for maximum mineral uptake and optimum growth is that minerals are not enough available to the explants. there are the inter-relationships between plant growth, mineral uptake, medium water potential, and mineral movement through the medium. plantlet...

2015
Jean-François Briat Hatem Rouached Nicolas Tissot Frédéric Gaymard Christian Dubos

Phosphate and sulfate are essential macro-elements for plant growth and development, and deficiencies in these mineral elements alter many metabolic functions. Nutritional constraints are not restricted to macro-elements. Essential metals such as zinc and iron have their homeostasis strictly genetically controlled, and deficiency or excess of these micro-elements can generate major physiologica...

Journal: :Magnesium research 2008
Maria Długaszek Mirosława Szopa Jacek Rzeszotarski Piotr Karbowiak

Disturbance of mineral status in patients with chronic renal failure (CRF) is one of many complications of this disease. Trace elements analysis in hair is sometime used by clinicians for a diagnosis of mineral status. In the present study concentration of magnesium and other trace elements was determined in serum, erythrocytes, and hair of patients with CRF undergoing hemodialysis (n = 31) and...

2011
S. Jiménez A. Garín Y. Gogorcena J. A. Betrán

This research was aimed to study the interest of flower analysis as a tool for the prognosis of nutritional deficiencies on cherry trees and confirm the influence of rootstock on the mineral uptake by tree. This type of diagnosis is compared with foliar analysis. The trial was established on a calcareous clay-loam soil, where ‘Sunburst’ cultivar on eight rootstocks: CAB 6P, CAB 11E, Masto de Mo...

In the environment, two main sources of heavy metals are natural backgrounds derived from parent rocks and anthropogenic contamination including mineral industrial wastes, tailing damps of sulfide mines, agrochemicals, and other outputs of industrial activities and factories. In this work, the physico-chemical aspects of the magnetic Nano- mineral surfaces are studied in contrast to acid mine d...

2009
S. Z. Xin Y. J. Song C. Lv Y. K. Rui F. S. Zhang W. Xu D. Wu S. Wu J. Zhong D. L. Chen Q. Chen F. T. Peng

Consumption of vegetables is one of the most important ways of providing the body with mineral elements. However, it is not clear how mineral elements are distributed in different organs of vegetables, especially vegetables grown in greenhouses. The distribution of mineral elements in the root and leaves of greenhouse spinach was determined using synchrotron radiation XRF, the results indicated...

2013
Peter W. Abrahams Theo C. Davies Abiye O. Solomon Amanda J. Trow Joanna Wragg

The prime aim of our work is to report and comment on the bioaccessible concentrations - i.e., the soluble content of chemical elements in the gastrointestinal environment that is available for absorption - of a number of essential mineral nutrients and potentially harmful elements (PHEs) associated with the deliberate ingestion of African geophagical materials, namely Calabash chalk and Undong...

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