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两种配合饲料对比格幼犬饲喂效果的比对

广东畜牧兽医科技 2024年第3期49卷 93-96页

作者：汪荣根周治东赵志宏胡敏华广州医药研究总院有限公司实验动物研究开发中心/国家犬类实验动物资源库广东广州510240

为筛选出适用于比格幼犬生长的配合饲料,该试验采用两种配合饲料对16只12周龄幼犬进行三周的饲养试验。结果表明,A、B组幼犬的总平均日增重分别为33 g/d和43 g/d,B组比A组提高10 g/d;A、B组幼犬的相对生长率分别为13.30%和17.78%,B组比... 详细信息

为筛选出适用于比格幼犬生长的配合饲料,该试验采用两种配合饲料对16只12周龄幼犬进行三周的饲养试验。结果表明,A、B组幼犬的总平均日增重分别为33 g/d和43 g/d,B组比A组提高10 g/d;A、B组幼犬的相对生长率分别为13.30%和17.78%,B组比A组提高4.48%,B组增重效果优于A组(P<0.05);此外,B组幼犬粪便评分高于A组,提示B组配合饲料对于幼犬更易消化。因此,B组配合饲料更适于比格幼犬生长。

关键词：比格犬配合饲料日增重粪便

Thermal Oxidation of Silicon Carbide Substrates

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Journal of Materials Science & Technology 2009年第1期25卷 115-118页

作者： Xiufang Chen Liana Ning Yingmin Wang Juan Li Xiangang Xu Xiaobo hu minhua Jiang State Key Laboratory of Crystal Materials Shandong University Jinan 250100 China

Thermal oxidation was used to remove the subsurface damage of silicon carbide （SIC） surfaces. The anisotropy of oxidation and the composition of oxide layers on Si and C faces were analyzed. Regular pits were observed on the surface after the removal of the oxide layers, which were detrimental to the growth of high quality epitaxial layers. The thickness and composition of the oxide layers were characterized by Rutherford backscattering spectrometry （RBS） and X-ray photoelectron spectroscopy （XPS）, respectively. Epitaxial growth was performed in a metal organic chemical vapor deposition （MOCVD） system. The substrate surface morphology after removing the oxide layer and gallium nitride （GaN） epilayer surface were observed by atomic force microscopy （AFM）. The results showed that the GaN epilayer grown on the oxidized substrates was superior to that on the unoxidized substrates.

关键词： SiC Thermal oxidation GaN epitaxy

阴道用乳杆菌活菌联合干扰素治疗子宫颈高危型HPV感染的效果及对阴道内环境影响的研究

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中外医学研究 2024年第3期22卷 1-5页

作者：刘小燕胡敏华文依敏广州市妇女儿童医疗中心增城院区广东广州511300

目的:探讨阴道用乳杆菌活菌联合干扰素治疗子宫颈高危型人乳头瘤病毒(HPV)感染的效果及对阴道内环境的影响。方法:选取2022年3月—2023年2月广州市妇女儿童医疗中心(增城院区)收治的180例子宫颈高危型HPV感染患者,按随机数表法分为对照... 详细信息

目的:探讨阴道用乳杆菌活菌联合干扰素治疗子宫颈高危型人乳头瘤病毒(HPV)感染的效果及对阴道内环境的影响。方法:选取2022年3月—2023年2月广州市妇女儿童医疗中心(增城院区)收治的180例子宫颈高危型HPV感染患者,按随机数表法分为对照一组、对照二组和观察组,各60例。对照一组予以干扰素治疗;对照二组予以阴道用乳杆菌活菌治疗;观察组予以阴道用乳杆菌活菌联合干扰素治疗。评估三组临床疗效、阴道微生态、复发率及不良反应发生率。结果:观察组总有效率高于对照一组和对照二组,差异有统计学意义(P0.05)。结论:阴道用乳杆菌活菌联合干扰素可提高子宫颈高危型HPV感染患者的治疗效果,改善患者的阴道微生态内环境,降低复发率。

关键词：子宫颈高危型人乳头瘤病毒阴道用乳杆菌活菌干扰素阴道内环境转阴率复发率不良反应

Efficient production of chimeric mice from embryonic stem cells injected into 4-to 8-cell and blastocyst embryos

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Journal of Animal Science and Biotechnology 2013年第4期4卷 264-270页

作者： minhua hu Hengxi Wei Jingfeng Zhang Yinshan Bai Fenglei Gao Li Li Shouquan Zhang Agricultural Animal Genomics and Molecular Breeding Key Lab of Guangdong Province College of Animal Science South China Agricultural University

Background： Production of chimeric mice is a useful tool for the elucidation of gene function. After successful isolation of embryonic stem （ES） cell lines, there are many methods for producing chimeras, including co-culture with the embryos, microinjection of the ES ceils into pre-implantation embryos, and use of tetraploid embryos to generate the full ES-derived transgenic mice. Here, we aimed to generate the transgenic ES cell line, compare the production efficiency of chimeric mice and its proportion to yield the male chimeric mice by microinjected ES cells into 4- to 8-cell and blastocysts embryos with the application of Piezo-Micromanipulator （PMM）, and trace the fate of the injected ES cells. Results： We successfully generated a transgenic ES cell line and proved that this cell line still maintained pluripotency. Although we achieved a satisfactory chimeric mice rate, there was no significant difference in the production of chimeric mice using the two different methods, but the proportion of the male chimeric mice in the 4- to 8-cell group was higher than in the blastocyst group. We also found that there was no tendency for ES cells to aggregate into the inner cell mass using in vitro culture of the chimeric embryos, indicating that they aggregated randomly. Conclusions： These results showed that the PMM method is a convenient way to generate chimeric mice and microinjection of ES cells into 4- to 8-cell embryos can increase the chance of yielding male chimeras compared to the blastocyst injection. These results provide useful data in transgenic research mediated by ES cells.

关键词： Chimeric mice Embryonic stem cell Microinjection

Surface Polishing of 6H-SiC Substrates

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Journal of Materials Science & Technology 2007年第3期23卷 430-432页

作者： Xiufang CHEN Xiangang XU Juan LI Shouzhen JIANG Lina NING Yingmin WANG Deying MA Xiaobo hu minhua JIANG State Key Laboratory of Crystal Materials Shandong University Jinan 250100 China

The surface polishing for silicon carbide （SIC） substrates was investigated and results were presented for mechanical polishing （MP） and chemo-mechanical polishing （CMP）. High quality surfaces were obtained after CMP with colloidal silica. The removal mechanism of scratches in MP and detailed physical and chemical process during CMP were analyzed. The effects of MP and CMP on the surface roughness were assessed by optical microscopy （OM）, atomic force microscopy （AFM） and step profilometry. KOH etching and high resolution X-ray diffractometry （H RXRD） were applied to evaluate the subsurface damage of 6H-SiC substrates.

关键词： SiC Chemo-mechanical polishing (CMP) Roughness Subsurface damage

R-matrix for the 8-Dimensional Spin Representation of Uq(so7)

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Acta Mathematica Sinica,English Series 2024年第2期40卷 485-497页

作者： Hong Mei hu Nai Hong hu School of Mathematical Sciences Suzhou University of Science and TechnologySuzhou 215009P.R.China School of Mathematical Sciences MOE Key Laboratory of Mathematics and Engineering Applications&Shanghai Key Laboratory of PMMPEast China Normal UniversityShanghai 200241P.R.China

The purpose of the paper is to describe the solution to the quantum Yang-Baxter equation associated with the 8-dimensional spin representation Tsp of Uq(so7).The self-duality of Tsp and the symmetry of the corresponding braiding matrix are ***,the minimal polynomial of the braiding R-matrix of Tsp is presented explicitly in an ingenious method by taking advantage of nice features of the spin representation Tsp.

关键词： Braiding R-matrix spin module minimal polynomial

Mapping out the reaction network of humin formation at the initial stage of fructose dehydration in water

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Green Energy & Environment 2024年第6期9卷 1016-1026页

作者： Xing Fu Yexin hu Ping hu hui Li Shuguang Xu Liangfang Zhu Changwei hu Key Laboratory of Green Chemistry and Technology Ministry of EducationCollege of ChemistrySichuan UniversityChengduSichuan610064China State Key Laboratory of Southwestern Chinese Medicine Resources Innovative Institute of Chinese Medicine and PharmacyChengdu University of Traditional Chinese MedicineChengduSichuan611137China

The formation of humins hampers the large-scale production of 5-hydroxymethylfurfural(HMF)in ***,a detailed reaction network of humin formation at the initial stage of fructose-to-HMF dehydration in water is delineated by combined experimental,spectroscopic,and theoretical *** bimolecular reaction pathways to build up soluble humins are *** is,the intermolecular etherification of β-furanose at room temperature initiates the C12 path,whereas the C-C cleavage of a-furanose at 130-150℃ leads to C11 path,and that of open-chain fructose at 180℃ to C11' *** successive intramolecular dehydrations and condensations of the as-formed bimolecular intermediates lead to three types of soluble *** show that the C12 path could be restrained by using HCl or AlCl_(3) catalyst,and both the C12 and C110 paths could be effectively inhibited by adding THF as a co-solvent or accelerating heating rate via microwave heating.

关键词： Carbohydrates 5-hydroxymethylfurfural Reaction network Soluble humins Tautomer

Investigation of mechanical and electrical characteristics of selfsensing pneumatic torsional actuators

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Science China(Technological Sciences) 2024年第1期67卷 130-142页

作者： XIAO Wei hu DeAn hu GuoLiang XIAO Yihua Key Laboratory of Conveyance and Equipment Ministry of EducationEast China Jiaotong UniversityNanchang 330013China Key Laboratory of Advanced Design and Simulation Techniques for Special Equipment Ministry of EducationHunan UniversityChangsha 410082China

Soft pneumatic actuators are one of the most promising actuation for soft robots,and great achievements have been *** it remains challenging to endow sensing capabilities to pneumatic actuators,especially for the sensing ability originating directly from the actuator ***,a self-sensing pneumatic torsional actuator(SPTA)is designed based on the electromagnetic induction effect and magnetically responsive *** SPTA can generate feedback voltage and current with the deformation,in which the sensing function comes from its inherent *** investigate the mechanical and electrical characteristics,an experimental platform and a finite element model are established,*** find that the torsion angle and output torque increase in nonlinear with the actuating *** maximum torsion angle is 66.35°,which is 84.34%of that for the actuator fabricated by pure *** maximum output torque(24.9 N mm)improves by 23.19%compared with the actuator made by pure *** regards the electrical characteristics,the maximum feedback voltage and current are 2.90μV and 29.50 nA when the SPTA is actuated by a pressure of−40 *** also demonstrate that the relationship between the torsion angle and the magnetic flux change is approximately ***,the number of turns of wires,magnetic powders contents,and magnetic direction on the feedback voltage and current are *** show that the feedback voltage and current can be enhanced by increasing the number of turns and magnetic powders *** envision that the SPTA would be promising for soft robots to realize their accuracy control and intelligentization.

关键词： pneumatic torsional actuators self-sensing feedback voltage finite element modeling soft robots

Effect of CO_(2) Opposing Multiple Jets on Thermoacoustic Instability and NO_(x) Emissions in a Lean-Premixed Model Combustor

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Journal of Thermal Science 2024年第1期33卷 207-221页

作者： ZHOU Hao hu Liubin Institute for Thermal Power Engineering State Key Laboratory of Clean Energy UtilizationZhejiang UniversityHangzhou 310027China

This paper experimentally studied the effect of CO_(2) opposing multiple jets on the thermoacoustic instability and NO_(x) emissions in a lean-premixed model *** feasibility was verified from three variables:the CO_(2) jet flow rate,hole numbers,and hole diameters of the *** indicate that the control effect of thermoacoustic instability and NO_x emissions show a reverse trend with the increase of open area ratio on the whole,and the optimal jet flow rate range is 1-4 L/min with CO_(2) opposing multiple *** this flow rate range,the amplitude and frequency of the dynamic pressure and heat release signals CH~* basically decrease as the CO_(2) flow rate increases,which avoids high-frequency and high-amplitude thermoacoustic *** amplitude-damped ratio of dynamic pressure and CH*can reach as high as 98.75% and 93.64% with an optimal open area ratio of 3.72%.NO_(x) emissions also decrease as the jet flow rate increases,and the maximum suppression ratio can reach 68.14%.Besides,the flame shape changes from a steep inverted "V" to a more flat "M",and the flame length will become shorter with CO_(2) opposing multiple *** research achieved the synchronous control of thermoacoustic instability and NO_(x) emissions,which could be a design reference for constructing a safer and cleaner combustor.

关键词： thermoacoustic instability lean-premixed model combustor CO_(2)opposing multiple jets open area ratio NO_(x)emissions