نتایج جستجو برای: varkesh and beheshtabad sub
تعداد نتایج: 16863858 فیلتر نتایج به سال:
Abstract The crystal structures and formation reactions of lanthanum hydride selenides were studied by neutron diffraction on the deuterides. reaction La 2 D 2− x Se with deuterium gas (298 K≤ T ≤567 K, 0.1 MPa≤ p (D )≤9.0 MPa) was followed in situ a sapphire single‐crystal gas‐pressure cell time resolution two minutes. phase fractions Se, 3 4 determined Rietveld refinement. With stepwise incre...
We report the facile and efficient synthesis of common electrophilic haloboranes via a protonolysis reaction between Piers’ borane, HB(C6F5)2, H−X (X=Cl, Br). This route benefits from fast times, easy setup, minimal workup to yield analytically pure etherates, (C6F5)2BCl(OEt2) (1) (C6F5)2BBr(OEt2) (2), as well ether-free tri-coordinate species, (C6F5)2BBr (3).
learning a second or foreign language requires the manipulation of four main skills, namely, listening, reading, speaking, and writing which lead to effective communication. it is obvious that vocabulary is an indispensible part of any communication, so without a vocabulary, no meaningful communication can take place and meaningful communication relies heavily on vocabulary. one fundamental fac...
high molecular weight (hmw) glutenin sub-units and baking quality related traits were studied in 49 iranian wheat landraces. the protein content ranged from 11.2% to 13.55%, and sds sedimentation volume varied between 40 and 60 milliliters. high molecular weight glutenin electrophoresis profiles revealed that at the glu-a1 locus, the frequency of null allele was higher than sub-units 1 and 2*. ...
A structural-magnetic models of the orthorhombic and triclinic modifications arsenates Cu4O(AsO4)2 isotypic phosphates Cu4O(PO4)2 has been built analyzed. Their base elements are complicated ribbons composed antiferromagnetic Cu4 tetrahedra. Structurally, these tetrahedra have no shared copper atoms; however, there strong (AFM) ferromagnetic (FM) couplings between them, both within them. It est...
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