نتایج جستجو برای: fractional crystallization
تعداد نتایج: 82382 فیلتر نتایج به سال:
Crystallization chaperones have been used to facilitate the crystallization of challenging proteins. Even though the maltose-binding protein (MBP) is one of the most commonly used crystallization chaperones, the design of optimal expression constructs for crystallization of MBP fusion proteins remains a challenge. To increase the success rate of MBP-facilitated crystallization, a series of expr...
Recent findings of evolved martian crustal materials by orbiters and rovers challenged the longstanding notion an only-tholeiitic basaltic crust. Models exploring intraplate magmatic processes like fractional crystallization show that unrealistic amounts solid accumulation are sometimes required for formation materials, including analyzed Curiosity rover at Gale crater. Assimilation (AFC) play ...
transparent glasses in a system of li2o-mgo-sio2-al2o3-fchemical constituents were prepared by melt quenching method. in the fabrication of nanocrystal glass-ceramics, controlled nucleation and subsequent crystal growth were necessary to avoid loss of transparency. it was therefore important to understand thermal properties and crystallization kinetics of the glass ceramics. the crystallization...
Solvent-driven separation processes can extract water and high-value minerals from high salinity or contaminated brines, simultaneously reducing the environmental impact of brine disposal enabling resource recovery. The efficient dewatering hypersaline brines is essential for sustainable minimal zero liquid discharge processing industrial wastewaters. Fractional crystallization selectively ions...
in this manuscript a new method is introduced for solving fractional differential equations. the fractional derivative is described in the caputo sense. the main idea is to use fractional-order legendre wavelets and operational matrix of fractional-order integration. first the fractional-order legendre wavelets (flws) are presented. then a family of piecewise functions is proposed, based on whi...
"Jake_M," the first rock analyzed by the Alpha Particle X-ray Spectrometer instrument on the Curiosity rover, differs substantially in chemical composition from other known martian igneous rocks: It is alkaline (>15% normative nepheline) and relatively fractionated. Jake_M is compositionally similar to terrestrial mugearites, a rock type typically found at ocean islands and continental rifts. B...
BACKGROUND The chemistry of tetralin-1,4-dione, the stable tautomer of 1,4-dihydroxynaphthalene, has not been explored previously. It is readily accessible and offers interesting opportunities for synthesis. RESULTS The title reactions were explored. L-Selectride reduced the diketone to give preferentially the cis-diol (d.r. 84 : 16). Red-Al gave preferentially the trans-diol (d.r. 13 : 87). ...
Mineral chemistry, major and trace elements and Sr-Nd isotopes are presented for basalts and trachybasalts from the Quaternary alkaline Tepi shield from southwest Ethiopia. The lavas are variably porphyritic with phenocrysts of olivine (Fo67–87), clinopyroxene (Wo45–47En38–40Fs13–16), plagioclase (An57–68) and Ti-magnetite set in a microcrystalline matrix. Although there are two high-MgO lavas ...
We have observed 2D protein crystallization under conditions where in the absence of flow, crystallization fails to occur. Even under conditions where crystallization does occur in quiescent systems, we have found that flow can accelerate the crystallization process. By interrogating the flow responsible for this enhanced crystallization, we have correlated the enhancement with large shear in t...
پیشرفت اخیر در حسابان کسری (fractional calculus) منجر به معرفی کاربردهایی از حسابان کسری در تئوری کنترل شده است. یکی از کاربردهای اولیه حسابان کسری کنترل-کننده های مرتبه کسری (fractional order) می باشند که توانسته اند توجه قابل ملاحظه ای را در بررسی های آکادمیک و کاربردهای صنعتی به خود جلب کنند. در این پایان نامه از کنترل کننده های مرتبه کسری به عنوان کنترل کننده مکمل جبرانگر استاتیکی توان راکت...
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