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犊牛腹泻的病因及中草药治疗研究进展

饲料研究 2024年第7期47卷 121-125页

作者：马泽豪王纯洁敖日格乐陈浩姚多曹天宇刘佳兴任书男内蒙古农业大学兽医学院内蒙古呼和浩特010018 内蒙古农业大学动物科学学院内蒙古呼和浩特010018

犊牛腹泻是影响犊牛生长发育的主要疾病之一。造成犊牛腹泻的因素有细菌、病毒、寄生虫性腹泻及非感染因素。细菌性腹泻是犊牛临床常见的腹泻原因之一,其发生机制主要是细菌进入肠道后大量增殖,破坏肠道菌群的平衡,进而对犊牛的肠黏膜... 详细信息

犊牛腹泻是影响犊牛生长发育的主要疾病之一。造成犊牛腹泻的因素有细菌、病毒、寄生虫性腹泻及非感染因素。细菌性腹泻是犊牛临床常见的腹泻原因之一,其发生机制主要是细菌进入肠道后大量增殖,破坏肠道菌群的平衡,进而对犊牛的肠黏膜屏障造成严重破坏。中草药具有调节机体肠道菌群、增强免疫功能、降低犊牛腹泻率等作用。文章对犊牛腹泻的病因及其中草药治疗研究进展进行综述,为中草药临床治疗犊牛腹泻的应用提供参考。

关键词：犊牛肠道菌群腹泻中草药

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同带泵浦的Tm:CYA调Q锁模激光器

中国光学（中英文） 2024年第4期17卷 764-770页

作者：孙堂正李云飞谭晶荣杜晓娟丁嘉宇任舒婷许浩王翀杨金芳张明霞朱永乐董忠令维军甘肃省全固态激光工程研究中心甘肃天水741001 集成电路封装与测试教育部工程研究中心甘肃天水741001

以半导体可饱和吸收镜SESAM作为锁模启动元件,利用同带泵浦技术首次在Tm:CaYALO_(4)(Tm:CYA)激光器实现了被动调Q锁模运转。光路采用X型四镜腔结构,泵浦源采用Er:Y_(3)Al_(5)O_(12)(Er:YAG)固体激光器,其中心波长为1650 nm。分别采用0.5... 详细信息

以半导体可饱和吸收镜SESAM作为锁模启动元件,利用同带泵浦技术首次在Tm:CaYALO_(4)(Tm:CYA)激光器实现了被动调Q锁模运转。光路采用X型四镜腔结构,泵浦源采用Er:Y_(3)Al_(5)O_(12)(Er:YAG)固体激光器,其中心波长为1650 nm。分别采用0.5%、1.5%、3%和5%透过率的输出耦合镜,对激光器连续光输出和锁模输出特性进行研究。结果表明:当采用5%透过率的输出耦合镜时,激光器的输出特性最好;当激光器在连续光运转情况下,得到了894 mW的最高功率和16%的最大斜效率输出;将连续光功率优化至最高,在光路中加入SESAM锁模元件后,当吸收泵浦功率大于1.86 W时,激光运转进入不稳定的调Q状态;当吸收泵浦功率提高到5.7 W时,实现了稳定的被动调Q锁模运转;吸收泵浦功率达到6.99 W时,采用5%透过率的输出耦合镜,获得了最高输出功率为399 mW的锁模脉冲激光;此时调Q包络下重复频率为98.11 MHz,脉冲宽度为619.4 ps,对应的最大单脉冲能量为4.07 nJ,调Q包络中锁模脉冲调制深度接近100%。实验结果证明,同带泵浦技术可以用于激光器以产生调Q锁模脉冲,为超短脉冲激光的产生提供了一种新的泵浦方式。

关键词： Tm:CYA激光器同带泵浦半导体可饱和吸收镜(SESAM) 调Q锁模

Combination of PDTC and GBE Could Better Alleviate the Damage to Ha Ca T Cells Caused by UVB

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Biomedical and Environmental Sciences 2019年第10期32卷 779-782页

作者： XU Feng HOU Bao Lian WANG Yuan MENG Fan Zhu ZHUANG Chuan Ning PAN Qi Zheng ren shu Ping Department of Nephrology the Second Hospital of Jilin UniversityChangchun 130041JilinChina Department of Occupational and Environmental Health School of Public HealthJilin UniversityChangchun 130021JilinChina Department of Anesthesia China-Japan Union HospitalJilin UniversityChangchun 130033JilinChina

Ultraviolet radiation(UVR)is a public health concern due to the depletion in ozone layer and the excessive exposure to UVR has been recognized as one of the major environmental risk factors for various skin diseases including the damage on keratinocyte which leading to formation of cutaneous malignancies[1].UVR consists of UVA(320-400nm),UVB(290-320nm)and UVC(200-290nm)[2].

关键词： PDTC damage UVB

Ferromagnetism in High-Surface-Area ZnO Nanosheets Prepared by a Template-Assisted Hydrothermal Method

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Chinese Physics Letters 2018年第6期35卷 90-93页

作者： Hui-Fang Yang Ling-Zhi Tang Qiang Sun Lei Sun Zhen-Hua Li shu-Xia ren School of Material Science and Engineering Shijiazhuang TieDao University

High-surface-area ZnO nanosheets are prepared using a template-assisted hydrothermal method.A saturation moment as high as 0.02 emu/g is obtained for the ZnO *** photoluminescence spectroscopy and x-ray photoelectron spectroscopy demonstrate the existence of abundant oxygen vacancies on the surfaces of the *** addition,the oxygen vacancy concentration increases with an increasing nanosheet surface *** results show that the origin of the room-temperature ferromagnetism is closely related with a large surface area and oxygen vacancies of the *** finding suggests that the high-surface-area ZnO nanosheets are promising to be applied to spintronic devices.

关键词： ZnO Ferromagnetism in High-Surface-Area ZnO Nanosheets Prepared by a Template-Assisted Hydrothermal Method

Application of slotting-pipe shaped blasting for hard-rock rapid driving

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Journal of Coal Science & Engineering(China) 2013年第2期19卷 143-146页

作者： ren-shu YANG Xiao-Hai ZHANG Zhao-Ran ZHANG Xiao-Sheng BAI School of Mechanics and Civil Engineering China University of Mining and Technology (Beijing) Beijing 100083 China Zhengzhong Mine of Fenxi Mining Group Lvliang 032000 China

The cumulative blasting using PVC slotting pipe was tested for rapid driving in hard-rock roadway construction. First, the outhors optimized blasting parameters on 2.2 m scheme, and did both-sides comparative experiment of the surrounding holes after the blasting success. The results show that the application of slotting tube obtains four more cut contours than the case without it. Finally we did full-section control and non-control blasting comparative experiment, the results show that the rates of half-hole marks and the non-smooth grades of the cut contours can reach 95%, hole spacing is expanded to larger than 550 mm, and 550 mm is the best under the K2 limestone conditions.

关键词： hard-rock rapid driving slotted-pipe cumulative blasting

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基于遗传算法的锥光全息测量系统标定技术

半导体光电 2008年第4期29卷 613-616页

作者：任淑艳哈尔滨工业大学自动测试与控制系黑龙江哈尔滨150001

针对锥光全息式非接触测量的高度信息恢复问题,对光强-高度标定方法的不足进行了分析,提出了一种基于相对变化量的相位-高度标定方法,即在理论和实验结合下,确定相位和被测距离的相对变化量的数学关系,并采用具有全局优化能力的遗传算... 详细信息

针对锥光全息式非接触测量的高度信息恢复问题,对光强-高度标定方法的不足进行了分析,提出了一种基于相对变化量的相位-高度标定方法,即在理论和实验结合下,确定相位和被测距离的相对变化量的数学关系,并采用具有全局优化能力的遗传算法对确定的关系式中的各个参数进行优化。实验结果表明,该方法大大降低了光源波动对图像处理的影响,同时,简化了运算,确保了测量的速度和准确性。此外,用这种方法建立的标定数据模型还解决了相对平缓表面测量的限制。

关键词：锥光全息非接触测量数据标定遗传算法

Characteristics and Driven Factors of Nitrous Oxide and Carbon Dioxide Emissions in Soil Irrigated with Treated Wastewater

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Journal of Integrative Agriculture 2012年第8期11卷 1354-1364页

作者： XUE Yan-dong YANG Pei-ling LUO Yuan-pei LI Yun-kai ren shu-mei SU Yan-ping NIU Yong-tao College of Water Resources and Civil Engineering China Agricultural University Beijing 100083 P.R.China Institute of Environment and Sustainable Development in Agriculture Chinese Academy of Agricultural Sciences Beijing 100081 P.R. China

The reuse of treated wastewater in agricultural systems could partially help alleviate water resource shortages in developing countries. Treated wastewater differs from fresh water in that it has higher concentrations of salts, Escherichia coli and presence of dissolved organic matter, and inorganic N after secondary treatment, among others. Its application could thus cause environmental consequences such as soil salinization, ammonia volatilization, and greenhouse gas emissions. In an incubation experiment, we evaluated the characteristics and effects of water-filled pore space （WFPS） and N input on the emissions of nitrous oxide （N2O） and carbon dioxide （CO2） from silt loam soil receiving treated wastewater. Irrigation with treated wastewater （vs. distilled water） significantly increased cumulative N2O emission in soil （117.97 μg N kg-1）. Cumulative N2O emissions showed an exponentially increase with the increasing WFPS in unamended soil, but the maximum occurred in the added urea soil incubated at 60% WFPS. N2O emissions caused by irrigation with treated wastewater combined with urea-N fertilization did not simply add linearly, but significant interaction （P〈0.05） caused lower emissions than the production of N2O from the cumulative effects of treated wastewater and fertilizer N. Moreover, a significant impact on cumulative CO2 emission was measured in soil irrigated with treated wastewater. When treated wastewater was applied, there was significant interaction between WFPS and N input on N2O emission. Hence, our results indicated that irrigation with treated wastewater should cause great concern for increasing global warming potential due to enhanced emission of N2O and CO2.

关键词： treated wastewater nitrous oxide carbon dioxide water-filled pore space urea

2021—2022年广东省中山市医疗机构新生儿病房建设状况研究

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中国妇幼卫生杂志 2024年第1期15卷 48-52页

作者：陈志君赖春华杨杰杨春晖任淑华中山市博爱医院广东中山528400 南方医科大学南方医院广东广州510515

目的调查2021—2022年广东省中山市医疗机构新生儿病房现况,为进一步推动全市新生儿病房建设提供理论基础。方法选取中山市内年分娩量>100人次的27家助产机构(分娩量占全市的94.68%)为研究对象,通过广东省中山市妇幼健康信息平台、27家... 详细信息

目的调查2021—2022年广东省中山市医疗机构新生儿病房现况,为进一步推动全市新生儿病房建设提供理论基础。方法选取中山市内年分娩量>100人次的27家助产机构(分娩量占全市的94.68%)为研究对象,通过广东省中山市妇幼健康信息平台、27家助产机构的门诊医师工作站+住院医师工作站+电子病历系统,采集2021年10月1日至2022年9月30日新生儿病房建设基本数据,并采取调查问卷的形式发放至各助产机构,由各新生儿病房负责人填写问卷获得补充数据,包括人员职称情况、机构转运量和设备数量。结果中山市27家助产机构Ⅲ级新生儿病房在三级医院设置率为100.0%,Ⅱ级新生儿病房在二级医院设置率为64.7%,Ⅰ级新生儿病房在一级医院设置率为50.0%,总体分布差异有统计学意义(P<0.05);27家助产机构年分娩量为41242人,年出院人数为12414人,年转运量为515人;医床比为0.41(151人/366张),护床比为0.90(329人/366张);床位数占年分娩量的8.87‰,转运量占年分娩量的1.25%;每床位数的婴儿保温箱、蓝光治疗仪、监护仪分别为0.86、0.54、1.04台;新生儿重症监护病房(neonatal intensive care unit,NICU)床位数72张,每NICU床位数的有创呼吸机为0.60台。结论目前,广东省中山市各级新生儿病房能力层级符合同等级医院综合水平发展要求,人力、床位、设备充足,但婴儿保温箱、有创呼吸机存量不足,建议逐步投入和改善,以满足新生儿病房的最新建设需求,更好地保障新生儿的健康水平。

关键词：新生儿病房级别人力资源床位设备

Molar heat capacities of La_2Mo_2O_9 and La_(1.9)Sr_(0.1)Mo_2O_(9-δ)

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Journal of University of Science and Technology Beijing 2007年第5期14卷 395-398页

作者： Baijun Yan Jianhua Liu Yunduo Dai Qifeng shu Zhihua ren Metallurgical and Ecological Engineering School University of Science and Technology Beijing Beijing 100083 China

The molar heat capacities of La2Mo209 and La1.9Sr0.1MO209-δ were obtained using the differential scanning calorimetry （DSC） technique in a temperature range from 298 to 1473 K. The DSC curve of La2Mo209 showed an endothermal peak around 834 K corresponding to a first-order monoclinic-cubic phase transition, and the enthalpy change accompanying this phase transition is 5.99 kJ/mol. No evident endothermal peak existed in the DSC curve of La1.9Sr0.1MO209-δ, but a broad thermal anomaly existed in its heat capacity curve at around 832 K. In addition, the heat capacity values of La2Mo209 and La1.9Sr0.1MO209-δ began to decrease at 1196 and 1330 K, respectively. The non-transitional heat capacity values of La2Mo209 and La1.9Sr0.1MO209-δ were formulated using multiple regression analysis in two temperature ranges.

关键词： heat capacity phase transition La2M0209 La1.9Sr0.1MO209-δ DSC