نتایج جستجو برای: Mineral ions

تعداد نتایج: 201474  

Journal: :تنش های محیطی در علوم زراعی 0
محمد عظیمی گندمانی دانشجوی کارشناسی ارشد دانشگاه یاسوج هوشنگ فرجی گروه زراعت واصلاح نباتات دانشگاه یاسوج اشکبوس دهداری گروه زراعت واصلاح نباتات دانشگاه یاسوج محسن موحدی دهنوی گروه زراعت واصلاح نباتات دانشگاه یاسوج مصطفی علی نقی زاده گروه زراعت واصلاح نباتات دانشگاه یاسوج

dry land salinity is one of the major problems affecting agricultural products. the main consequences of plant exposure to salt stress are water deficit and ion excess, which lead to several morphological and physiological changes. in order to evaluate the effect of salinity on some physiological characteristics of 8 spring rapeseed cultivars, an experiment was conducted in the greenhouse at ya...

Journal: :Pure and applied chemistry. Chimie pure et appliquee 1972
P G Kihlstedt

The different types of mineral industries wastes are characterized. Total tonnage in the world of finely ground wastes from i.a. flotation and leaching operations amounts to around 1 500 million tons per annum. The major environmental problems arise from slowly settling fine particles, dissolved metal ions and chemicals retained in the effluent. The paper discusses the toxic effects of dissolve...

Journal: :Physical review letters 2015
E Holmström L Stixrude

Ferropericlase, (Mg,Fe)O, is the second-most abundant mineral of Earth's lower mantle. With increasing pressure, the Fe ions in the material begin to collapse from a magnetic to nonmagnetic spin state. We present a finite-temperature first-principles phase diagram of this spin crossover, finding a broad pressure range with coexisting magnetic and nonmagnetic ions due to favorable enthalpy of mi...

2012
Won Kim Sebastiano Collino John Spencer Evans

Cooperative effects of magnesium ions and acidic polypeptides originating from a family of proteins known as Asprich (mollusk Atrina rigida) were studied. In our previous studies, these two acidic polypeptides were found to be effective in controlling the morphology of the calcium carbonate mineral, the main inorganic constituent of prismatic layer of the mollusk shell. Since these Asprich sequ...

Journal: :Prague medical report 2010
M Durfinová M Brechtlová L' Kuračka J Zálešáková J Celko B Liška

Influence of mineral water from Trenčianske Teplice (drinkable source) on lipid peroxidation processes was determined in model situations under in vitro conditions using the brain tissue. The central nervous system was selected because it is especially sensitive to the radical-induced damage. In addition, there is a high content of polyunsaturated fatty acids in the brain which has a low antiox...

2016
Qicheng Feng Shuming Wen Qinbo Cao Jiushuai Deng Wenjuan Zhao Athanasios Godelitsas

Chloride ions were found to potentially increase activity of cerussite surfaces. Dissolution experiments, zeta potential measurements, X-ray photoelectron spectroscopy (XPS) studies, and density functional theory (DFT) computation were conducted in this study. Dissolution experiments showed that the lead ion concentrations in the NaCl solution system were lower than those in the deionized water...

2010
Tanya M. Cunningham Jennifer L. Koehl Jack S. Summers Shelley E. Haydel

BACKGROUND Recent studies have demonstrated that several mineral products sold for medicinal purposes demonstrate antimicrobial activity, but little is known about the physicochemical properties involved in antibacterial activity. METHODOLOGY/PRINCIPAL FINDINGS Using in vitro mineral suspension testing, we have identified two natural mineral mixtures, arbitrarily designated BY07 and CB07, wit...

Journal: :The Indian journal of medical research 1989
N Mago I B Sofat R K Jethi

Rat urine could inhibit not only the in vitro initial precipitation of calcium and phosphate/oxalate ions as mineral phase but also the subsequent growth of the preformed mineral phase. Oral administration of the aqueous extract of a commercially available Ayurvedic compound preparation to rats, was found to significantly increase the ability of the urine samples to inhibit both the initial min...

2012
Delphine Farlay Georges Boivin

The main function of bone is to promote locomotion and protection of vital organs. Bone is also an important mineral ions reservoir, essential to maintain phosphocalcic homeostasis. Bone mineral is a calcium phosphate named “apatite”, which form naturally in the Earth’s crust (Wopenka & Pasteris 2005). Compared to others minerals, apatite is more “tolerant” and is very accommodating to chemical...

2018
Qingjing Peng Langbo Yi Lulu Zhou Qingzhong Peng

Pseudomonas chlororaphis strain L19, isolated from stone coal soil, has the ability to perform bioleaching to release vanadium ions from mineral ore. Here, we report the draft genome sequence and annotation of the vanadium-leaching bacterium Pseudomonas chlororaphis L19. These data provide information for understanding the genomic properties and mineral bioleaching mechanisms of strain L19.

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