نتایج جستجو برای: silicate rock

تعداد نتایج: 49032  

Journal: :فصلنامه علمی اکوفیزیولوژی گیاهان زراعی 0
آتنا نجفی تیرتاشی دانشجوی کارشناسی ارشد زراعت دانشگاه آزاد اسلامی واحد آیت الله آملی مهران محمودی استادیار گروه زراعت دانشگاه آزاد اسلامی واحد آیت الله آملی،آمل،ایران

in order to determine the effect of potassium silicate solution with elements of macro and micro elements on agronomic traits of rice, tarom, a field experiment in paddy fields galogah city - village marbles of the crop year 2014 was conducted. the results showed that the highest plant height (013/180 cm) to 2 liters per hectare and no interaction effects of potassium silicate elements. the res...

Journal: :Macromolecular bioscience 2012
Akhilesh K Gaharwar Vipuil Kishore Christian Rivera Whitney Bullock Chia-Jung Wu Ozan Akkus Gudrun Schmidt

The mechanical and biological properties of silicate-crosslinked PEO nanocomposites are studied. A strong correlation is observed between silicate concentration and mechanical properties. In vitro cell culture studies reveal that an increase in silicate concentration enhances the attachment and proliferation of human mesenchymal stem cells significantly. An upregulation in the expression of ost...

2003
MAHESH ANAND LAWRENCE A. TAYLOR CLIVE R. NEAL GREGORY A. SNYDER ALLAN PATCHEN YUJI SANO KENTARO TERADA

Lunar meteorite EET 96008 is a fragmental breccia that predominantly consists of basaltic mineral clasts (0.5–2 mm), along with minor lithic fragments and breccia clasts. The matrix consists mainly of smaller mineral fragments ( 0.5 mm), bound by glassy cement, the majority of which are pyroxene and plagioclase. The pyroxene possesses extensive exsolution lamellae. These lamellae, up to 1 m in ...

2009
R. D. Ash

Introduction: Bulk ureilites have near chondritic abundances of siderophile elements [1-7], showing no correlation with Fe contents (~5-16 wt.%) or mg (molar Mg/[Mg+Fe]). These observations are difficult to reconcile with any igneous model for their silicates [8]. We address this problem through detailed characterization of the metal phases in ureilites [9], and petrologic modelling [10]. Here ...

Journal: :The Astrophysical Journal 2022

Abstract It is reasonable to assume that the structure of a planet and interior distribution its components are determined by formation history. We thus follow growth from small embryo through subsequent evolution. estimate accretion rate range based on protoplanetary disk model at large-enough distance central star for water ice be major component. accreted material mixture silicate rock ice, ...

2011
Peter B. Kelemen Juerg Matter Elisabeth E. Streit John F. Rudge William B. Curry Jerzy Blusztajn

Near-surface reaction of CO2-bearing fluids with silicate minerals in peridotite and basalt forms solid carbonate minerals. Such processes form abundant veins and travertinedeposits, particularly in associationwith tectonically exposed mantle peridotite. This is important in the global carbon cycle, in weathering, and in understanding physical-chemical interaction during retrograde metamorphism...

2013
Ueder Pedro Lopes Laércio Zambolim Pedro Nery Souza Neto Antônio Fernando Souza Alexandre Sandri Capucho Fabricio de Ávila Rodrigues

In order to evaluate the effect of potassium silicate spray on the control of coffee leaf rust and coffee yield, an experiment was conducted during the 2005/2006 and 2006/2007 growing seasons on Coffea arabica cv. Catuaí Vermelho IAC 144, in a location situated at an elevation of 850 m in Coimbra, Minas Gerais, Brazil. The treatments consisted of: 1 potassium silicate; 2 potassium silicate + co...

2017
Farnaz Jafari Sanaz Jafari

Background Recently a new generation of endodontic sealers has been developed based on calcium silicate as MTA Fillapex, Endoseal MTA, Total Fill BC Sealer, EndoSequence BC Sealer, iRoot SP, Endo CPM sealer, MTA-Angelus and ProRoot Endo Sealer. A review of literature was conducted to discuss the composition, physicochemical properties, and clinical perspectives of calcium silicate based sealers...

2004
JOHN W. MORSE

Central to the question of life on Mars is whether there has been liquid water on the martian surface and how the planet could have evolved from possible initial warm and wet conditions to the cold and dry present state. Virtually all models for this climatic evolution rely strongly on the removal of an initial thick carbon dioxide atmosphere by precipitation of carbonate minerals from surface ...

Journal: :Frontiers in climate 2021

There is growing urgency for CO 2 removal strategies to slow the increase of, and potentially lower, atmospheric concentrations. Enhanced weathering, whereby natural reactions between silicate minerals that produce dissolved bicarbonate ions are accelerated, has potential remove substantial on decadal centennial timescales. The global mining industry produces huge volumes of fine wastes could b...

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