Search

【目的】探讨常规体外受精胚胎移植（in vitro fertilization and embryo transfer,IVF-ET）不受精时,应用卵母细胞单精子显微注射（intracytoplasmic sperm injection,ICSI）技术进行补救授精的临床意义。【方法】2001年8月～2005年8月,在499个常规IVF-ET周期中有25个周期完全不受精,进行补救ICSI,并与同期实施的179个正常ICSI周期进行比较。【结果】补救ICSI组与正常ICSI组比较,HCG日平均血清雌二醇水平、每个成熟卵泡平均血清雌二醇量、每个周期的获卵数无明显差别,补救ICSI受精率为57.7%,低于正常ICSI组（67.8%）,补救ICSI组平均每个周期获得胚胎数（7.8±3.9）比正常ICSI（10.0±4.9）组少,且有统计学意义（P〈0.01）。补救ICSI组≥4细胞的胚胎占总胚胎数的54.5%,低于正常ICSI组（87.5%）,有统计学意义（P〈0.01）。正常ICSI组妊娠率为38.5%,补救ICSI组无一例妊娠。补救ICSI组中有8例在下一周期行ICSI,有2例妊娠并分娩2个健康女婴。【结论】补救ICSI虽可以避免取消IVF周期，但其受精率和妊娠率低，其临床应用价值还有待于进一步探讨。对于常规IVF不受精的患者，再次治疗时可考虑行ICSI助孕。

【目的】研究腹部超声引导下胚胎移植对体外受精-胚胎移植结局的影响。【方法】回顾性分析2001年7月至2005年3月，在本中心接受体外受精-胚胎移植（包括卵母细胞内单精子注射）治疗的461名患者521个周期的资料，按照胚胎移植时有无B超引导分为常规胚胎移植组（A组）和超声引导下胚胎移植组（B组），分别有187个周期和334个周期，比较两组患者的临床妊娠率、胚胎种植率、胚胎残留率和异位妊娠率。【结果】A组和B组的周期妊娠率分别是35．8％（67／187）和38.3％（128／334），P〉0．05；胚胎种植率分别是17．4％（104／599）和23．2％（179／773），P〈0．01；胚胎残留率分别是3．7％（7／187）和0．3％（1／334），P〈0．01；异位妊娠率分别是3．0％（2／67）和1．6％（2／128），P〉0．05。【结论】腹部超声引导下胚胎移植能提高体外受精-胚胎移植的胚胎种植率，降低胚胎残留率，可能有助于改善临床妊娠率和降低异位妊娠率，是一种有效的胚胎移植方法。

Copyright of Continue Education Research is the property of Harbin Normal University and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Zhejiang Electric Power is the property of Zhejiang Electric Power Editorial Office and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Chinese Journal of Applied Mechanics is the property of Chinese Journal of Applied Mechanics Editorial Office and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Computer Measurement & Control is the property of Magazine Agency of Computer Measurement & Control and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Journal of China Medical University is the property of Journal of China Medical University Editorial Office and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Practical Pharmacy & Clinical Remedies is the property of Editorial Department of Practical Pharmacy & Clinical Remedies and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Journal of Practical Medicine / Shiyong Yixue Zazhi is the property of Journal of Practical Medicine Editorial Office and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Progress in Modern Biomedicine is the property of Publishing House of Progress in Modern Biomedicine and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Chinese Journal of Clinical Healthcare is the property of Chinese Journal of Clinical Healthcare and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Chinese Journal of Clinical Healthcare is the property of Chinese Journal of Clinical Healthcare and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Atomic Energy Science & Technology is the property of Editorial Board of Atomic Energy Science & Technology and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Acta Materiae Compositae Sinica is the property of Acta Materiea Compositae Sinica Editorial Department and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

A gas chromatography (GC) internal standard method for the simultaneous determination of raw materials and products in 2-methylaziridine (2-MeAZ) reaction solution was developed. Monoethano- lamine (MEA) was used as an internal standard. The samples were separated on a DB-35 capillary column and detected with flame ionization detector (FID). The results showed that the components of the samples were well separated in the experimental conditions, with the linear correlation coefficient of each component greater than 0.99, the recoveries between 98.71% and 101. 12%, and the relative standard deviation (RSD) less than 0.93%. The method is suitable for the rapid analysis of intramolecular dehydration process of iso-propanol amine (IPA) to 2-MeAZ in vapour phase. [ABSTRACT FROM AUTHOR]

X - ray diffraction and in - situ alternate current impedance spectra of AlN nanowires have been measured under pressures up to 31. 8 GPa by using a diamond anvil cell. The results s how that the electrical parameters of AlN nanowires changed discontinuously at 22. 6 GPa, which is related to the structural phase transition from wurtzite to rocksalt phase. The scattering of electrons by the crystal lattice in the rock salt phase plays a leading role in conduction process. The electron conduction in the wurtzite phase is mainly long - range conduction. Short - range conduction exists in the rocksalt phase, and the effect of short - range conduction is enhanced with increasing pressure; The dielectric loss peak of the wurtzite phase appears at 1 Hz and is not affected by pressure, while the dielectric loss peak of the rocksalt phase decreases with increasing pressure and shifts to the low frequency direction, indicating that pressure can effectively control the dielectric properties of the sample. This research will provide experimental basis for further research an d application of AlN and related materials. [ABSTRACT FROM AUTHOR]

Copyright of Shandong Medical Journal is the property of Shandong Medical Health Newspapers and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Architectural Journal / Jian Zhu Xue Bao is the property of Architectural Journal Editorial Office and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Modern Food Science & Technology is the property of Editorial Office of Modern Food Science & Technology and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Wool Textile Journal is the property of National Wool Textile Science & Technology Information Center and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Journal of Shaanxi University of Science & Technology is the property of Journal of Shaanxi University of Science & Technology Editorial Department and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of West China Journal of Stomatology is the property of Sichuan University, West China College of Stomatology and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Food Research & Development is the property of Food Research & Development Editorial Department and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Practical Pharmacy & Clinical Remedies is the property of Editorial Department of Practical Pharmacy & Clinical Remedies and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Journal of Signal Processing is the property of Journal of Signal Processing and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Practical Pharmacy & Clinical Remedies is the property of Editorial Department of Practical Pharmacy & Clinical Remedies and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of China Mechanical Engineering is the property of Editorial Board of China Mechanical Engineering and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Practical Pharmacy & Clinical Remedies is the property of Editorial Department of Practical Pharmacy & Clinical Remedies and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

A new scheme to couple the energy-convective upwind and split pressure (E-CUSP) scheme with the weighted essentially non-oscillatory (WENO) scheme is proposed for Euler equation. In the spatial direction, the flux of low dissipation E-CUSP scheme is reconstructed using high-precision WENO scheme. Fourth-order total variation reduction Runge-Kutta method is used for propulsion in time direction. On this base, a high accuracy flux splitting method for solving Euler equation is proposed. It is found through numerical simulation of shock tube that the proposed scheme can be used to simulate the shock tube problem and capture the shock wave and contact discontinuity more accurately compared to E-CUSP scheme. The numerical results show that the proposed scheme has higher accuracy and robustness. [ABSTRACT FROM AUTHOR]

Copyright of Journal of Shanghai Jiaotong University (Medical Science) is the property of Journal of Shanghai Jiaotong University (Medical Science) and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of West China Journal of Stomatology is the property of Sichuan University, West China College of Stomatology and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Wind load is the main control loads on the design of large-span coal storage sheds. With the researching accumulation of wind resistance of structures, especially with the accumulation of wind tunnel data, intellectual windresistant design using the concept of data mining gained increasing popularity. Based on 701 cases, 4 581 samples of wind tunnel data of cylindrical and spherical roofs, data mining and statistical analyses were carried out, and the generalized regression neura] network for the prediction of wind load parameters was established. With 12 480 cases of parametric wind-induced response analyses on single- and double- layer cylindrical and spherical latticed shells, the empirical estimation method of the equivalent static wind load was proposed. Finally, a basic framework of wind-resistant design for the main load-bearing system was built by combining the artificial neural network for aerodynamic wind load and empirical prediction for equivalent static wind load. The effectiveness of ihe method was proved by the application on the prestressed latticed shell structure of a domestic super-large-span coal storage. Ft can be concluded that the presented method can provide an efficient estimation of the design wind load which can envelope the wind-induced response analysis results. The method can be used in quick estimating the design wind load in the preliminary design stage. [ABSTRACT FROM AUTHOR]

The present research proposed a simplified engineering model of wind pressure spectra that can describe the characteristics of body-induced turbulence around large-span roofs. The model was based on the spectral analyses on 1 730 cases, 18 048 samples of wind tunnel data on five types of typical large-span roofs including flat, cantilevered, cylindrical, spherical and saddle roofs. Two key parameters, namely, the peak frequency and the coherence index, were introduced to describe the wind pressure spectra and to develop the simplified model. The results show that, the mentioned five types of large-span roofs can be divided into three categories in spectral perspective. Category I is bluff body with sharp corners represented by flat and saddle roofs. Category H is cantilevered roof characterized as planar flow. Category III is curved bluff body represented by cylindrical and spherical roofs. For roof category I and I I，the peak frequencies are concentrated at 0.1 - 0.2 Hz, while the coherence indexes are concentrated at 2.5 and 3. 5，respectively. For roof category III，the peak frequencies are below 0.1 Hz, and the mode of coherence index is 4. 0. Finally, through statistical analyses, the zone values of spectral parameters are given for engineering reference. [ABSTRACT FROM AUTHOR]