نتایج جستجو برای: fractional crystallization

تعداد نتایج: 82382  

Ghobadnam, Maryam, Shahbazi, Hosain,

West and south­west of Razan igneous rocks are located in the Hamedan Province in the Sanandaj- Sirjan zone, west Iran. According to petrography and chemical studies, these rock bodies are composed of diorite, gabbrodiorite, monzonite, quartz- monzonite, andesite and andesibasalt. The results of geochemical analysis show that these rocks belong to a cal- alkaline magma series. The geochemical c...

Ahangari, , Asadpour, , Pashapour, ,

Amphibolites crop out in the NW Salmas as two relatively small bodies around Abati and Ureban villages. Based on petrography and mineral paragenesis, the composition of Abati and Ureban amphibolites consists mainly of epidote amphibolite and amphibolite, respectively. Relict of clinopyroxenes from a parental rock are present in some samples. Mineral paragenesis (high hornblende and plagioclase ...

Journal: :The Journal of antibiotics 1970
M Arai K Hamano

Isolation of azalomycins F3, F4 and Fg from azalomycin F-complex crystals was successfully conducted. F3 was less soluble in methanol than other components and was isolated by fractional crystallization of F-complex from 80~ 100% methanol in water. F4 and F5 were separated by P-cellulose column chromatography, from which F5 and F4 were eluted with 60 % aqueous methanol and 0.01M ammonium acetat...

2016

The current paradigm argues the Moon formed after a giant impact that produced a deep lunar magma ocean (LMO). After a period of turbulent convection, the LMO experienced fractional crystallization, causing the initially peridotitic liquid to evolve to a plagioclase-saturated ferrobasalt. The lunar crust, much of which comprises 93-98% pure anorthosite [1,2], formed by flotation of positively b...

2014
Omar Gerardo Rocha-Amador Jose Alberto Gallegos-Infante Qingrong Huang Nuria Elizabeth Rocha-Guzman Martha Rocio Moreno-Jimenez Ruben F Gonzalez-Laredo

The objective of this study was to evaluate the influence of gelator, vegetable oil, stirring speed, and temperature on the physical properties of obtained organogels. They were prepared under varying independent conditions and applying a fractional experimental design. From there a rheological characterization was developed. The physical characterization also included polarized light microscop...

2011
R. Somma

Detailed stratigraphic sampling of formations from Somma-Vesuvius (Southern Italy) volcano complex erupted during the last 3550 years of inteplinian activity provide a framework for comprehensive chemical analyses and isotopic studies. The evolution of majorand trace-element abundances of these rocks suggest that fractional crystallization together with crustal assimilation are only a partial e...

2003
Anthony J. Schmidt Orion Ciftja Carlos Wexler

We investigate a possible trial state for liquid crystalline phases with hexatic order in two dimensions using a generalization of Laughlin’s wave function for a 1/7-filled lowest Landau level. This state has possible applications for the understanding of recent experiments showing melting at ca. 135 mK of the Wigner crystal to a fractional quantum Hall state at low filling factors @Phys. Rev. ...

Journal: :Chirality 2001
D Kozma E Fogassy

Solvent-free optical resolution of N-methylamphetamine was developed by distillation after partial diastereoisomeric salt formation. From the 18 chiral acids tested by this method, five provide by this method resolution: O,O'-dibenzoyltartaric acid, O,O'-di-p-toluoyltartaric acid, 6-methoxy-alpha-methyl-2-naphthaleneacetic acid (Naproxen), the cis-permetrinic acid, and the 2-phenoxypropionic ac...

Journal: :Journal of Petrology 2022

Abstract Magma differentiation in arc settings has usually been attributed to an interplay of processes (fractional crystallization, assimilation, and magma mixing). Homogeneous fractional crystallization widely used model the magmatic evolution volcanic systems due its simplicity, even though boundary layer fractionation (BLF) proposed as a preponderant process hydrous systems. Both models pro...

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