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51.
We introduce new expressions for the generalized Drazin inverse of a block matrix with the generalized Schur complement being generalized Drazin invertible in a Banach algebra under some conditions. We generalized some recent results for Drazin inverse and group inverse of complex matrices. 相似文献
52.
Dijana Pei Ivana Ozimec Landek Mladen Meraep Milan Mesia 《Journal of heterocyclic chemistry》2006,43(3):749-754
A novel synthetic route to 2‐methyl‐1,8‐dioxa‐dibenzo[e,h]azulenes [1] via cyclisation of the corresponding 1,4‐dicarbonyl compound is described. 1,4‐Dicarbonyl compounds were synthesized by the alkylation reaction of the 11H‐dibenzo[b,f]oxepine‐10‐one while analogous alkylation of 11H‐dibenzo[b,f]thiepine‐10‐one resulted in formation of O‐alkylated products. Selective oxidation of 2‐methyl group afforded 1,8‐dioxa‐dibenzo[e,h]azulenes with formyl and hydroxymethyl functionality at C(2) position. 相似文献
53.
Summary.
We study certain functional equations derived from the
definition of a Jordan *-derivation pair.
More precisely, if A is a complex
*-algebra and M is a
bimodule over A, having the structure of a complex vector space
compatible with the structure of A,
such that
implies
m = 0 and
implies m
= 0 and
if
are unknown additive mappings satisfying
then E and
F can be represented by double centralizers. The
obtained result implies that one of the equations in the
definition of a Jordan *-derivation pair is redundant.
Furthermore, a remark on the extension of this result to unknown
additive mappings
such that
is given in a special case. 相似文献
54.
ESI‐MS studies of the non‐covalent interactions between biologically important metal ions and N‐sulfonylcytosine derivatives 下载免费PDF全文
Valentina Ključarić Renata Kobetić Jasmina Rinkovec Snježana Kazazić Dubravka Gembarovski Dijana Saftić Josipa Matić Željka Ban Biserka Žinić 《Journal of mass spectrometry : JMS》2016,51(11):998-1005
The aim of this report is to present the electrospray ionization mass spectrometry results of the non‐covalent interaction of two biologically active ligands, N‐1 ‐ (p‐toluenesulfonyl)cytosine, 1‐TsC, 1 and N‐1 ‐ methanesulfonylcytosine, 1‐MsC, 2 and their Cu(II) complexes Cu(1‐TsC‐N3)2Cl2, 3 and Cu(1‐MsC‐N3)2Cl2 and 4 with biologically important cations: Na+, K+, Ca2+, Mg2+ and Zn2+. The formation of various complex metal ions was observed. The alkali metals Na+ and K+ formed clusters because of electrostatic interactions. Ca2+ and Mg2+ salts produced the tris ligand and mixed ligand complexes. The interaction of Zn2+ with 1–4 produced monometal and dimetal Zn2+ complexes as a result of the affinity of Zn2+ ions toward both O and N atoms. Copyright © 2016 John Wiley & Sons, Ltd. 相似文献
55.
Dijana Šimkūnaitė Emilija Ivaškevič Ignas Valsiūnas Aleksandras Kaliničenko Antanas Steponavičius 《Journal of Solid State Electrochemistry》2008,12(3):225-236
The early stages of Cu electrodeposition onto a GC electrode were investigated in 0.5 M H2SO4 + 0.01 M CuSO4 solution without or with H2SeO3 when a molar concentration ratio [Cu(II)]/[Se(IV)] was 1.104 to 2.102. The H2SeO3 solution in 0.5 M H2SO4 was also used. The electrochemical techniques such as cyclic voltammetry and chronoamperometry and structural investigation
using ex situ AFM were applied to study the nucleation and growth of Cu onto a GC electrode. Chronoamperometric results were
shown to follow an instantaneous 3D nucleation and diffusion-controlled growth model by Scharifker and Hills. The values of
number of Cu nuclei N and average nuclei radius r
av were calculated. It was shown that, in the presence of H2SeO3 in amounts of 0.001 to 0.005 mM, N increases and r
av decreases. At higher concentrations of the additive, the changes of these parameters with the deposition potential E
dep were shown to be somewhat more complex. The dependences of N and r
av on the concentration of H2SeO3 in different regions of Cu overpotentials were also revealed. 相似文献
56.
Krajacić M Ivancic-Jelecki J Forcic D Vrdoljak A Skorić D 《Journal of chromatography. A》2007,1144(1):111-119
Replicative double-stranded RNA (dsRNA) is useful in preliminary identification of Cucumber mosaic virus and its satellite RNA (satRNA). This plant pathogen complex yields sufficient quantity of the replicative RNA form that can be isolated by chromatography on chemically unmodified graded cellulose powder (CF-11). In this work, much faster and more efficient procedure using DEAE monoliths was developed in which dsRNA was separated from other species in total nucleic acids extract originating from the infected plant tissue. The developed chromatographic method revealed the pathogens' presence in only 15 min, avoiding nucleic acid precipitation and electrophoretic analysis. 相似文献
57.
Ligand-directed dynamics of adenine riboswitch conformers 总被引:2,自引:0,他引:2
Eskandari S Prychyna O Leung J Avdic D O'Neill MA 《Journal of the American Chemical Society》2007,129(37):11308-11309
58.
Sutlovic D Gamulin S Definis-Gojanovic M Gugic D Andjelinovic S 《Electrophoresis》2008,29(7):1467-1472
Human DNA quantification by quantitative real-time PCR (QRT-PCR) has gained great importance in forensic DNA and ancient DNA studies. However, in such samples, DNA quantification is impaired by the frequently present humic acid (HA). We have previously shown that the addition of synthetic HA inhibits QRT-PCR. In this study we investigated the possible mechanisms of HA interaction with human DNA, and kinetics of QRT-PCR inhibition. In QRT-PCR with pure human DNA and no HA added, VMAX was 40. With DNA sample containing 4 microg/mL of HA, VMAX was 30.30 while the addition of extra Taq polymerase to the same sample changed VMAX into 38.91, amplifying between 80 and 90% of input DNA. The KM/VMAX ratio in all the samples remained constant, indicating that the mechanism of HA inhibition of QRT-PCR is uncompetitive by nature. Moreover, HA shifts the human DNA melting temperature point (Tm) from 75 to 87 degrees C and inhibits DNase I-mediated DNA cleavage, most probably affecting the enzyme's activity. 相似文献
59.
Spontaneous CO Release from RuII(CO)2–Protein Complexes in Aqueous Solution,Cells, and Mice 下载免费PDF全文
Dr. Miguel Chaves‐Ferreira Inês S. Albuquerque Dr. Dijana Matak‐Vinkovic Dr. Ana C. Coelho Dr. Sandra M. Carvalho Dr. Lígia M. Saraiva Prof. Carlos C. Romão Dr. Gonçalo J. L. Bernardes 《Angewandte Chemie (International ed. in English)》2015,54(4):1172-1175
We demonstrate that RuII(CO)2–protein complexes, formed by the reaction of the hydrolytic decomposition products of [fac‐RuCl(κ2‐H2NCH2CO2)(CO)3] (CORM‐3) with histidine residues exposed on the surface of proteins, spontaneously release CO in aqueous solution, cells, and mice. CO release was detected by mass spectrometry (MS) and confocal microscopy using a CO‐responsive turn‐on fluorescent probe. These findings support our hypothesis that plasma proteins act as CO carriers after in vivo administration of CORM‐3. CO released from a synthetic bovine serum albumin (BSA)–RuII(CO)2 complex leads to downregulation of the cytokines interleukin (IL)‐6, IL‐10, and tumor necrosis factor (TNF)‐α in cancer cells. Finally, administration of BSA–RuII(CO)2 in mice bearing a colon carcinoma tumor results in enhanced CO accumulation at the tumor. Our data suggest the use of RuII(CO)2–protein complexes as viable alternatives for the safe and spatially controlled delivery of therapeutic CO in vivo. 相似文献
60.
We express the multiplicities of the irreducible summands of certain tensor products of irreducible integrable modules for an affine Kac-Moody algebra over a simply laced Lie algebra as sums of multiplicities in appropriate excellent filtrations (Demazure flags). As an application, we obtain expressions for the outer multiplicities of tensor products of two fundamental modules for \(\widehat {\mathfrak {sl}}_{2}\) in terms of partitions with bounded parts, which subsequently lead to certain partition identities. 相似文献