Due to high resolution power of sulfated cyclodextrins (HS-CDs), utilization of these selectors for chiral resolution of 7 basic and 2 zwitterionic drugs have been examined. Experiments were performed on a HP3DCE instrument equipped with an on-column diode array UV absorbance detector. Fused silica capillaries with an inner diameter of 50 ?m, an outer diameter of 365 ?m, and a total length of 4...

Due to high resolution power of sulfated cyclodextrins (HS-CDs), utilization of these selectors for chiral resolution of 7 basic and 2 zwitterionic drugs have been examined. Experiments were performed on a HP3DCE instrument equipped with an on-column diode array UV absorbance detector. Fused silica capillaries with an inner diameter of 50 ?m, an outer diameter of 365 ?m, and a total length of 4...

A subset X of a lattice L with 0 is called CDW-independent if (1) it is CDindependent, i.e., for any x, y ∈ X , either x ≤ y or y ≤ x or x ∧ y = 0 and (2) it is weakly independent, i.e., for any n ∈ N and x, y1, . . . , yn ∈ X the inequalityx ≤ y1∨· · ·∨yn implies x ≤ yi for some i. A maximal CDW-independent subset is called a CDW-basis. With combinatorial examples and motivations in the backgr...

Abstract The emissions from the first luminous sources drive fluctuations in 21-cm signal at Cosmic Dawn (CD) via two main astrophysical processes, namely Ly ? coupling and X-ray heating, yielding a highly non-Gaussian signal. impact of these processes on its non-Gaussianity depends properties light. In this work, we consider different CD scenarios by varying major source parameters i.e. minimu...

The composite metal oxide electrode films were fabricated using ex situ electrodeposition method with further heating treatment at 300°C. The obtained composite metal oxide film had a spherical structure with mass loading from 0.13 to 0.21 mg cm(-2). The structure and elements of the composite was investigated using X-ray diffraction (XRD) and energy dispersive X-ray (EDX). The electrochemical ...

Physical, chemical and biological attributes of soil surface are significantly affected by tillage practices and crop rotation. The objective of this study was to determine the short-term (2006-2009) effects of conventional and conservational tillage practices on selected soil physical properties of a heavy clay soil under two wheat-corn and wheatlegume rotation in a semi-arid Mediterranean...

5. GUTFREUND, El., Trans. Faraday Sot., 61, 441 (1955). 6. WALBFI, K. A., KAUFFMAN, D. L., SAMPATH KUMAR, K. S. V., AND NEURATE, H., Proc. Natl. Ad. Sci. U. S., 51, 301 (1964). 7. WALSH, K. A., AND NEURATH, H., Proc. Nail. Acad. Sci. U. S., 52, 884 (1964). 8. MARE&GUIA, M., AND SHAW, E., Federation Proc., 22, 528 (1963). 9. CRESTFIELD, A. M., STEIN, W. H., AND MOORE, S., J. Bid. Chem., 238, 241...

Abstract The new compounds M 2+ Zr(SeO 4 ) 3 ( = Mg, Mn, Co, Ni, Zn, Cd) and Li 2 Zr( X O S, Se) were synthesized at 220 °C by reaction of Zr (CO )(OH) with hydroxides or carbonates / the respective acids H SeO /H SO . They form crystals up to several tenths a mm investigated single crystal X-ray diffraction. framework structures these selenates can be deduced from that monoclinic Fe (SO in spa...

heterogeneous proton exchange membranes (pem) are synthesized using the dry phase inversion technique. the casting solutions are prepared by dispersing a finely ground cation exchange resin particle in n,n-dimethylacetamide (dmac) solution of polyvinyl-chloride (pvc). results show that ion exchange capacity is increased with the addition of 1 %-wt nanosilica (from 0.14 to 0.27 meq/g) while it i...