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61.
Sudrik SG Chavan SP Chandrakumar KR Pal S Date SK Chavan SP Sonawane HR 《The Journal of organic chemistry》2002,67(5):1574-1579
alpha-Diazoketones possess high electric dipole moments, as a consequence of the dipolar nature of the diazocarbonyl functional group. The vectorial analysis, theoretical calculations (PM3 and ab initio), and literature reports based on experimental and theoretical calculations reveal a higher dipole moment for the Z-configuration of the diazo functional group. Microwave irradiation of alpha-diazoketone (1a-m) (Figure 1) promotes Wolff rearrangement specifically via the Z-configuration in excellent yields. The dielectric properties of the solvent govern the course of the microwave rearrangement. 3-Diazocamphor (1m) on microwave irradiation in benzylamine exhibits nonthermal effects to furnish exclusively the Wolff rearrangement product (4m), equivalent to its photochemical behavior. In the presence of an aqueous medium, through solvent heating predominates, leading to the formation of a tricyclic ketone (5) as the principal product, arising from an intramolecular C-H insertion. This behavior is similar to its known thermal and transition metal catalyzed reactivity pattern. 相似文献
62.
S. B. Ogale D. M. Phase P. P. Patil S. M. Kanetkar S. V. Ghaisas V. G. Bhide S. K. Date 《Hyperfine Interactions》1986,29(1-4):1193-1196
The effect of ion beam induced atomic mixing and subsequent thermal transformations at the Fe:Al2O3 interface have been investigated by means of conversion electron Mössbauer spectroscopy [CEMS]. It is shown that the asdeposited and ion beam mixed samples exhibit distinctly different features. In particular, the ion beam mixed sample in as-mixed state shows the presence of FeAl2O4 along with non-stoichiometric FeO. Upon annealing at 600°C it shows precipitation of α-Fe with reduced contribution of FeAl2O4. The study of dose dependence of ion beam mixing has also revealed interesting features regarding the ion beam induced interface reactions. 相似文献
63.
G. Date 《General Relativity and Gravitation》1997,29(8):953-971
The Einstein equation with T
= k
k +
where k, l are null is considered with spherical symmetry and staticity. The solution has a naked singularity and is not asymptotically flat. However, it may be interpreted as an envelope for any static spherical body making it more massive. Such an interpretation and some of its implications are detailed. 相似文献
64.
Hirofumi Inoue Takuya Harada Seiji Eto Ken Nakashima Takuya Ibusuki Keiko Kosha Yuuko Date Emiko Sanematsu Yoshitake Shinohara Kojiro Takahashi Reiji Yoshimura Jun Nakamura Eijiro Kojima Yasuto Tsuruta 《Biomedical chromatography : BMC》2013,27(6):688-690
The therapeutic drug monitoring of paroxetine could be used to optimize the pharmacological treatment of depressed patients. A simple and sensitive high‐performance liquid chromatography procedure was developed for the determination of paroxetine in serum. After simple pretreatment of serum (50 μL) with acetonitrile and o‐phthalaldehyde, paroxetine was derivatized with 4‐(5,6‐dimethoxy‐2‐phthalimidinyl)‐2‐methoxyphenylsulfonyl chloride at 70°C for 20 min in borate buffer (0.1 mol/L, pH 8.0) to produce a fluorescent product. The derivative was separated on a reversed‐phase column at 40°C for stepwise elution with (A) acetic acid (10 mmol/L) and (B) acetonitrile. The flow rate was 1.0 mL/min. The fluorescence intensity was monitored at excitation and emission wavelengths of 320 and 400 nm, respectively. The within‐day and day‐to‐day relative standard deviations were 3.0–3.4 and 2.7–8.3%, respectively. The detection limit of paroxetine was 8.3 fmol at a signal‐to‐noise ratio of 3. As the proposed method that only requires a small quantity of serum (50 μL) is simple, sensitive and reproducible, it would be useful for clinical and biochemical research as well as drug monitoring. Copyright © 2013 John Wiley & Sons, Ltd. 相似文献
65.
Feifei Wang Takao Yasuhara Tetsuro Shingo Masahiro Kameda Naoki Tajiri Wen Ji Yuan Akihiko Kondo Tomohito Kadota Tanefumi Baba Judith Thomas Tayra Yoichiro Kikuchi Yasuyuki Miyoshi Isao Date 《BMC neuroscience》2010,11(1):1-9
Background
Junctional adhesion molecule-A (JAM-A) is an adhesive protein expressed in various cell types. JAM-A localizes to the tight junctions between contacting endothelial and epithelial cells, where it contributes to cell-cell adhesion and to the control of paracellular permeability.Results
So far, the expression pattern of JAM-A has not been described in detail for the different cell types of the adult brain. Here we show that a subset of proliferating cells in the adult mouse brain express JAM-A. We further clarify that these cells belong to the lineage of NG2-glia cells. Although these mitotic NG2-glia cells express JAM-A, the protein never shows a polarized subcellular distribution. Also non-mitotic NG2-glia cells express JAM-A in a non-polarized pattern on their surface.Conclusions
Our data show that JAM-A is a novel surface marker for NG2-glia cells of the adult brain. 相似文献66.
Munshi G Mustafa Sudhir Raniwala T Awes B Rai RS Bhalerao JG Contreras RV Gavai SK Ghosh P Jaikumar GC Mishra AP Mishra H Mishra B Mohanty J Nayak J-Y Ollitrault SC Phatak L Ramello R Ray PK Sahu AM Srivastava DK Srivastava VK Tiwari 《Pramana》2006,67(5):961-981
This is the report of Heavy Ion Physics and Quark-Gluon Plasma at WHEPP-09 which was part of Working Group-4. Discussion and
work on some aspects of quark-gluon plasma believed to have created in heavy-ion collisions and in early Universe are reported. 相似文献
67.
Ghanashyam Date 《Pramana》2004,63(4):905-914
This is an expanded version of the summary talk given at the conclusion of the ICGC-2004 held at Kochi. Brief introductory
remarks are included to provide a slightly wider context to the theme talks. 相似文献
68.
A network with its arc lengths as imprecise number, instead of a real number, namely, interval number and triangular fuzzy
number is considered here. Existing ideas on addition and comparison between two imprecise numbers of same type are introduced.
To obtain a fuzzy shortest path from a source vertex to all other vertices, a common algorithm is developed which works well
on both types of imprecise numbers under consideration. In the proposed algorithm, a decision-maker is to negotiate with the
obtained fuzzy shortest paths according to his/her view only when the means are same but the widths are different of the obtained
paths. Otherwise, a fuzzy optimal path is obtained to which the decision-maker always satisfies with different grades of satisfaction.
All pairs fuzzy shortest paths can be found by repeated use of the proposed algorithm. 相似文献
69.
Corrie T. Imrie G. S. Attard R. W. Date C. T. Imrie G. R. Luckhurst S. J. Roskilly J. M. Seddon L. Taylor 《Liquid crystals》2006,33(11):1449-1485
70.