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Mapping of homeobox gene Quox 1 on quail chromosome

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Chinese Science Bulletin 1997年第16期42卷 1397-1399页

作者： Wang, yh Yan, YS Fan, ST Xue, ZG Chinese Acad Sci Inst Genet Beijing 100101 Peoples R China Coll France F-75231 Paris France

IN 1984, Gehring and Scoff discovered homeobox genes respectively and confirmed that the homeobox genes were the control genes of the constructure genes in biological development, which was a breakthrough in molecular development biology. It is important for embryo development and evolution to further study the homeobox genes, including gene mapping. Recently, the reseach on the homeobox gene mapping has drawn much attention, but mostly

关键词： homeobox gene Quox 1 quail karyotype gene mapping.

Theoretical investigation on mechanism of dissociation of furan

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Chinese Science Bulletin 1997年第11期42卷 910-914页

作者： Feng, WL Wang, yh Zhang, SW Xi, HW Pang, XY Department of Chemistry Beijing Normal University Beijing China Department of Resource and Engineering Beijing University of Science and Technology Beijing Beijing China Department of Applied Chemistry Taiyuan Industrial University Taiyuan China

RECENTLY much attention has been paid to the mechanism of the dissociation of *** reason is not only that some neutral molecules by ultraviolet（UV）light mayproduce C4H4O+,but also that the investigation of this mech... 详细信息

关键词： furan cation barrier surface of dissociation process transition state intermediate.

PREPARATION　OF　OLIGOSACCHARIDES　FROM　THE　ENZYMATIC　HYDROLYSATES　OF　KONJAC　GLUCOMANNAN　BY　LOW－PRESSURE　COLUMN　CHROMATOGRAPHY

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Chinese Chemical Letters 1996年第2期7卷 131-132页

作者： Xu, GY Chang, LW Xu, YM Ma, yh Zhou, PJ ACAD SINICA INST CHEMBEIJING 100080PEOPLES R CHINA ACAD SINICA INST MICROBIOLBEIJING 100080PEOPLES R CHINA

Low pressure column chromatography with activated charcoal powder was used to separate the oligosaccharides and their isomers from the hydrolysates of konjac glucomannan.

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On the Methods of Beam Direction and MisorientationAngle/Axis Determination by Systematic Tilt

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Journal of Materials Science & Technology 1999年第5期15卷 410-414页

作者： Rong, yh He, G Chen, SP Hu, GX Gao, M Wei, RP Shanghai Jiao Tong Univ Sch Mat Sci & Engn Shanghai 200030 Peoples R China Lehigh Univ Dept Mech Engn & Mech Bethlehem PA 18015 USA

The methods for determining electron beam direction and misorientation angle/axis of grain boundaries are described in this paper. The present methods are based on a series of diffraction spot patterns obtained by systematic tilt of the crystal, combined with simple mathematical calculations. Instead of the use of Kikuchi patterns, the limitations resulting from the visibility or sharpness of Kikuchi lines and the number of Kikuchi pole(s) existed are avoided and a sufficient accuracy of determination has been achieved.

关键词： Transmission electron microscopy

Quantum Chemical Study on the Thermolysis of Dicyanofuroxan

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Chinese Chemical Letters 1998年第2期9卷 187-189页

作者： Li, yh Xu, WY Peng, YY Hong, SG Wang, S Jiangxi Normal Univ Dept Chem Nanchang 330027 Peoples R China Jiangxi Normal Univ Dept Chem Nanchang 330027 Peoples R China

AM1 and PM3 methods using the unrestricted Hartree-Fock (UHF) calculations have been applied to study the thermolysis of dicyanofuroxan. The results obtained show that the reaction proceeds to product through a two-st... 详细信息

关键词： transition state thermolysis dicyanofuroxan AM1 method PM3 method

Catheter ablation for atrial fibrillation in heart failure:untying the Gordian knot

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Journal of Geriatric Cardiology 2021年第4期18卷 297-306页

作者： Saad Javed Ioanna Koniari David Fox Chris Skene Gregory yh Lip Dhiraj Gupta Liverpool Centre for Cardiovascular Science University of LiverpoolLiverpool Heart and Chest HospitalLiverpoolUK Division of Cardiovascular Sciences University of ManchesterManchesterUK Cardiology Department University Hospital of ManchesterManchesterUK

Atrial fibrillation(AF) and heart failure(HF) are complex clinical entities that occur concomitantly in a significant population of patients, and their prevalence is rising in epidemic proportions. Traditionally, both rate and rhythm control strategies have been regarded as equivalent in the management of dysrhythmia in this AF-HF cohort with escalation of treatment largely guided by symptoms. Both disorders are involved in an elaborate pathophysiological interplay with shared cardiovascular risk factors that contribute to the development and sustenance of both AF and HF. Recent studies and continued development of evidence to support catheter ablation for AF has brought into question the traditional belief in equivalence between rate and rhythm control. Indeed, recent trials, in particular the CASTLE-AF(Catheter Ablation versus Standard Conventional Therapy in Patients with Left Ventricular Dysfunction and Atrial Fibrillation) study, suggest that catheter ablation for AF improves survival and rates of hospitalisation in patients with concomitant HF and AF, threatening a paradigm shift in the management of this patient cohort. The evident mortality benefit from clinical trials suggests that catheter ablation for AF should be considered as a therapeutic intervention in all suitable patients with the AF-HF syndrome as these patients may derive the greatest benefit from restoration of sinus rhythm. Further research is needed to refine the evidence base, especially to determine which subgroup of HF patients benefit most from catheter ablation and what is the optimal timing.

关键词： Catheter ablation for atrial fibrillation in heart failure:untying the Gordian knot

Classification of gastric neuroendocrine tumors and its clinicopathologic significance

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World Journal of Gastroenterology 1998年第2期4卷 66-69页

作者： Yu, JY Wang, LP Meng, yh Hu, M Wang, JL Bordi, C Navy Gen Hosp Dept Pathol Beijing 100037 Peoples R China PLA Beijing Command Area Gen Hosp Beijing Peoples R China Univ Parma I-43100 Parma Italy

AIMS To study the pathologic classification of gastric neuroendocrine tumors and its clinicopathologic significance. METHODS Paraffin embedded sections of 52 gastric neuroendocrine tumors including 42 carcinoid tumors, and 10 cases of neuroendocrine carcinoma from 326 patients who underwent resection of stomach carcinomas were studied by immunohistochemical methods including 10 endocrine markers or hormones antibodies and endocrine cells in gastric neuroendocrine tumors and extratumoral mucosa were observed under electromicroscope. RESULTS The 52 gastric neuroendocrine tumors were divided into three types: ① Gastrin dependent type of carcinoid (26 cases) accompanied by chronic atrophic gastritis (CAG) and tumor extension limited to the mucosa or submucosa complicated with hypergastrinemia and G cell hyperplasia. This type was consistently preceded by and associated with generalized proliferation of endocrine cells in the extratomoral fundic mucosa. ② Non gastrin dependent type of carcinoids (16 cases) associated with neither CAG nor hypergastrinemia. This type was more aggressive; and ③ Neuroendocrie carcinomas (10 cases), which are highly aggressive tumors. CONCLUSIONS A correct identification of different types of gastric endocrine tumors has major implications for the treatment and prognosis of the patients.

关键词： stomach neoplasms/pathology neuroendocrine tumors/pathology carcinoid tumor/pathology gastritis, atrophic G cell immunohistochemistry microsocopy, electron

STUDY ON CARBOXYL-CONTAINING STARCH IN HEAVY METAL REMOVAL

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Chinese Chemical Letters 1995年第7期6卷 605-608页

作者： Hu, ZA Zhou, XX Zhang, L Guo, yh Wu, HY NW Normal Univ Dept Chem Lanzhou 730070 Peoples R China Lanzhou Teachers Sch Dept Chem Lanzhou 730070 Peoples R China

Water-insoluble carboxyl-containing starch graft polymers were prepared. Residual metal ion concentrations in solutions treated with the insoluble starch graft polymers were measured in different pH. The mechanism of ...

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A Novel Humidity-Sensitive Material Based on PDEB with Nickel Complex Catalyst

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Chinese Chemical Letters 1998年第2期9卷 223-225页

作者： Yang, MJ Li, Y Zhan, XW Sun, HM Ling, MF Zhu, yh Zhejiang Univ Dept Polymer Sci & Engn Hangzhou 310027 Peoples R China Zhejiang Univ Dept Elect & Informat Hangzhou 310027 Peoples R China

Poly(p-diethynylbenzene) (PDEB) with improved solubility was synthesized using a novel catalyst bis(triphenylphosphine)bis(p-diethynylbenzene) nickel complex (NI-C). A surface acoustic wave (SAW) delay line oscillator was covered by Langmuir-Blodgett (LB) films of resulting PDEB to prepare a humidity sensor, which was found to have high sensitivity and good repeatability. PDEB shows promise as a good humidity-sensitive material.

关键词： humidity-sensitive material bis(triphenylphosphine)bis(p-diethynylbenzene) nickel poly (p-diethynylbenzene) SAW humidity sensor LB membrane