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Effect of pre-deformation on microstructure and mechanical properties of WE43 magnesium alloy II: Aging at 250 and 300℃

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Journal of magnesium and Alloys 2020年第1期8卷 103-110页

作者： Y.H.Kang Z.H.Huang S.c.Wang H.Yan R.S.chen J.c.Huang Guangdong-Hong Kong Joint Research and Development center on Advanced manufacturing Technology for Light Alloys Guangdong Institute of Materials and ProcessingGuangzhou 510650China Institute of metal Research chinese Academy of Sciences Shenyang 110016China Hong Kong Institute for Advanced Study Department of Materials Science and EngineeringCity University of Hong KongHong KongChina

In this work,the microstructural evolution and mechanical properties of a pre-deformed WE43 magnesium alloy when aged at 250 and 300℃ were further *** is found that the abundant deformation twins introduced by pre-deformation were maintained within the alloy during the aging *** particles formed at the twin boundaries and coarsened with aging time,especially at 300℃.When peak-aged at 250℃,the fine metastable β'''and β' precipitates formed in the un-deformed alloy have been transformed into relatively large β1 and β precipitates by the *** peak-aged at 300℃,the pre-deformation obviously refined the β *** properties indicate that pre-deformation can increase the yield strength by 19mPa and 54mPa for the peak-aged alloy at 250℃ and 300℃,respectively,and will not obviously deteriorate the tensile elongations.

关键词： WE43 magnesium alloy Pre-deformation Aging microstructure mechanical properties

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SF_6压气式断路器喷口堵塞现象的计算分析

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高压电器 1989年第6期25卷 9-16页

作者：林建民 m.T.c.Fang 西安高压电器研究所 Liverpool University England

在考虑了喷口内壁由于电弧辐射而引起的烧蚀的条件下,建立了一组计算SF_6压气式灭弧室与其喷口电弧的相互作用的数理方程,运用它所得到的计算结果,同GE公司的测试结果很吻合。

关键词： SF6 断路器喷口塞堵

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Occurrence of seeding metastases in resectable perihilar cholangiocarcinoma and the role of low-dose radiotherapy to prevent this

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World Journal of Hepatology 2020年第11期12卷 1089-1097页

作者： Lotte c Franken Eva Roos Job Saris Jeanin E van Hooft Otto m van Delden Joanne Verheij Joris I Erdmann marc G Besselink Olivier R Busch Geertjan van Tienhoven Thomas m van Gulik Department of Surgery Cancer Center AmsterdamAmsterdam UMCUniversity of AmsterdamAmsterdam 1105 AZNetherlands Department of Pathology Amsterdam UMCUniversity of AmsterdamAmsterdam 1105 AZNetherlands Department of Gastroenterology Amsterdam UMCUniversity of AmsterdamAmsterdam 1105 AZNetherlands Department of Interventional Radiology Amsterdam UMCUniversity of AmsterdamAmsterdam 1105 AZNetherlands Department of Radiation Oncology Amsterdam UMCUniversity of AmsterdamAmsterdam 1105 AZNetherlands

BAcKGROUND Preoperative biliary drainage in patients with presumed resectable perihilar cholangiocarcinoma(PHc)is hypothesized to promote the occurrence of seeding *** metastases can occur at the surgical scars or at the site of postoperative drains,and in case of percutaneous biliary drainage,at the catheter *** prevent seeding metastases after resection,we routinely treated PHc patients with preoperative radiotherapy(RT)for over 25 years until January *** To investigate the incidence of seeding metastases following resection of *** All patients who underwent resection for pathology proven PHc between January 2000 and march 2019 were included in this retrospective *** 2000-January 2018,patients received preoperative RT(3×3.5 Gray).RT was omitted in patients treated after January *** A total of 171 patients underwent resection for PHc between January 2000 and march *** 171 patients undergoing resection,111 patients(65%)were treated with preoperative *** bile cytology showed no difference in the presence of viable tumor cells in bile of patients undergoing preoperative RT or ***,two patients(1.2%)with seeding metastases were identified,both in the laparotomy scar and both after preoperative RT(one patient with endoscopic and the other with percutaneous and endoscopic biliary drainage).cONcLUSION The incidence of seeding metastases in patients with resected PHc in our series was low(1.2%).This low incidence and the inability of providing evidence that preoperative low-dose RT prevents seeding metastases,has led us to discontinue preoperative RT in patients with resectable PHc in our center.

关键词： Perihilar cholangiocarcinoma Seeding metastases Preventive radiotherapy

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室内空调系统中空气流动的cFD研究

华北电力大学学报（自然科学版） 2003年第2期30卷 71-77页

作者：朱永波姜根山 c.m.mak 北京长城航空测控技术研究所北京100080 华北电力大学应用物理系河北保定071003 香港理工大学屋宇设备工程学系

室内环境质量受到越来越多的重视。室内环境质量包括声环境、光环境、热环境和室内空气质量(IAQ)。室内空气质量(IAQ)会影响建筑物内部人群的工作效率和健康状况。开发了一种计算流体力学(cFD)软件,并用来模拟了几种典型的室内空调系统... 详细信息

室内环境质量受到越来越多的重视。室内环境质量包括声环境、光环境、热环境和室内空气质量(IAQ)。室内空气质量(IAQ)会影响建筑物内部人群的工作效率和健康状况。开发了一种计算流体力学(cFD)软件,并用来模拟了几种典型的室内空调系统中的气体流动。这些算例能够用来改进和优化空调系统部件的设计。cFD软件模拟算例的结果图显示了流动的压力分布和速度场。采用有限体积法Ni格式求解N.S方程,并为更好地模拟粘性流动,使用了k-ε湍流模型。

关键词：空调系统空气流动室内环境质量

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胸腰椎损伤分类和严重程度评分指导胸腰椎骨折的管理

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胸腰椎损伤分类和严重程度评分指导胸腰椎骨折的管理

作者： m.c.U.Shamal mathes 吉林大学

学位级别：硕士

背景：外伤性胸腰椎骨折的分类和评价在临床工作中一直存在很大争议。许多外伤性胸腰椎骨折分类系统和方案已经被提出，但一直没有一个能够普遍接受和使用的可靠分级制度。因此，建立一套准确的胸腰椎骨折评价方法和可靠地分类机制... 详细信息

背景：外伤性胸腰椎骨折的分类和评价在临床工作中一直存在很大争议。许多外伤性胸腰椎骨折分类系统和方案已经被提出，但一直没有一个能够普遍接受和使用的可靠分级制度。因此，建立一套准确的胸腰椎骨折评价方法和可靠地分类机制对于指导临床工作十分必要。从而病人能够获得及时和合适的治疗方案。胸腰椎损伤的分类及严重程度评分系统（TLISS）是通过一组国际脊柱创伤领域的成员组成的脊柱创伤研究组进行的调查结果的基础上提出的。TLISS系统可以简单准确的对胸腰椎骨折的病人进行是否需要手术进行分类。目的：本论文目的为利用TLISS系统如何在临床工作中及时、准确对胸腰椎病人进行系统评价和指导医师对病人是否需要手术做出合适的决定进行评估。从而能够提供给专科医生与其他协同科室医生一套比较完善的治疗胸腰椎骨折患者治疗规范。（“TLISS: inter-physician and inter-disciplinary validation of a newparadigm for the treatment of thoracolumbar spine trauma”）方法：我选取了我科近一年内30例胸腰椎骨折已接受手术治疗的病人。这30名患者手术之前没接受TLISS分析和评估。我利用TLISS系统对病人的病情进行重新评价和治疗选择，病人损伤程度评分依据（1）损伤机制（2）后纵韧带完整性（3）神经损伤严重程度三个方面。结果：通过TLISS系统评分对病人进行重新评价后发现30例病人中27例患者有超过5分（90%），从而正当了手术治疗选择。一名患者得4分（3.33%）。有两名患者得三或小于三的评分可以进行非手术治疗（6.67%）。结论：应用TLISS对胸腰椎骨折病人进行评分与分类，可以提供有效与及时的治疗手段，从而使可以非手术治疗的患者避免手术的风险和负担。通过大量的研究和调查证实应用TLISS系统进行评估与分类后可以选择非手术治疗的患者采取保守治疗与手术治疗后远期恢复效果无明显差异。

关键词：胸腰椎骨折分类系统

Laboratory Limits on Dermatophyte Diagnosis in Rabbits with clinical Lesions

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Journal of Agricultural Science and Technology(A) 2011年第4X期1卷 608-612页

作者： A. c. coelho m. L. Pinto A. m. coelho m. c. Fontes J. L. mourao V. Pineiros Departamento de ciencias Veterin6rias Universidade de Tras-os-Montes e Alto Douro Apartado 202 5001-801 Vila Real CodexCECA V Portugal Direccao de Servigos Veterindrios da Regido Norte Divisao de Intervencao Veterin6ria de Vila Real - Nucleo do Corgo PortugalLugar de Codecais 5000-421 Vila Real Portugal Direccao de Servigos Veterindrios da Regido Norte Divis6o de Intervencao Veterin6ria de Vila Real - N~cleo do Corgo PortugalLugar de Codecais 5000-421 Vila Real Portugal

Dermatophyte infection or ringworm is a superficial cutaneous infection with one or more of the fungal species of the keratinophilic genera microsporum, Trichophyton, or Epidermophyton and is a zoonosis with a great impact on public health. Dermatophytes were identified from rabbit sample cultures submitted to mycological examination in the Laboratory of microbiology of the University of Tr^-os-montes e Alto Douro, Vila Real, Portugal. All samples were collected from suspected clinical cases. Dermatophytes were cultured from 4 of the 55 spec.mens （7.3%）. The dermatophytes isolated were Trichophyton mentagrophytes var. mentagrophytes （1.8%） and microsporum gypseum （5.5%）. microscopic examination was negative in all spec.mens. In this work, Scopulariopsis spp., a contaminant mould, was identified in 13 spec.mens （23.6%）. The proportion of positive samples in relation to the number of samples examined from cases suspected was very low. As all samples were collected from rabbits with c.mpatible signs, we presume that the low prevalence of isolation was due to laboratory constraints on dermatophytes diagnosis.

关键词： Dermatophytes rabbits diagnosis isolation.

Green tea extract as a cryoprotectant additive to preserve the motility and DNA integrity of human spermatozoa

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Asian Journal of Andrology 2021年第2期23卷 150-156页

作者： Odai Am Alqawasmeh mingpeng Zhao carol PS chan maran BW Leung Ki c chow Nikunj Agarwal Jennifer Sm mak chi c Wang chi P Pang Tin c Li Wai K chu David YL chan Assisted Reproductive Technology Unit Department of Obstetrics and GynaecologyFaculty of MedicineThe Chinese University of Hong KongHong KongChina Department of Ophthalmology and Visual Sciences The Chinese University of Hong KongHong KongChina

cryopreservation impairs sperm quality and functions,including motility and DNA *** additives in sperm freezing media have previously brought improvements in postthawed sperm *** tea extract(GTE)is widely considered as an excellent antioxidant,and its beneficial role has been proven in other human *** study aims to evaluate the GTE as a potential additive in cryopreservation media of human *** part one,the semen of 20 normozoospermic.men was used to optimize the concentration of GTE that maintains sperm motility and DNA integrity against oxidative stress,induced by hydrogen peroxide(H_(2)O_(2)).Spermatozoa were treated with GTE at different concentrations before incubation with H_(2)O_(2).In part two,the semen of 45 patients was cryopreserved with or without 1.0 ng ml^(-1)*** 2 weeks,the semen was thawed,and the effect on sperm motility and DNA fragmentation was *** data showed that GTE significantly protected sperm motility and DNA integrity against oxidative stress induced by H_(2)O_(2)when added at a final concentration of 1.0 ng ml^(-1).We found that the addition of 1.0 ng ml^(-1)GTE to cryopreservation media significantly increased sperm motility and DNA integrity(both Pmore interestingly,patients with high sperm DNA damage benefited similarly from the GTE ***,there was no significant change in the reactive oxygen species(ROS)*** conclusion,supplementing sperm freezing media with GTE has a significant protective effect on human sperm motility and DNA integrity,which may be of clinical interest.

关键词： antioxidants cryopreservation additives sperm cryopreservation sperm DNA fragmentation sperm motility

correcting for non-c.mpliance when determining colonic transit time with radio-opaque markers

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World Journal of Gastroenterology 2017年第4期23卷 740-742页

作者： Alvin Ibarra Kaisa Olli Arthur c Ouwehand DuPont Nutrition and Health 02460 KantvikFinland

The use of radio-opaque markers and abdominal X-ray is the standard method for determining colonic transit time(cTT). However, when there are deviations in the intake of these markers by participants in clinical trials it is desirable to improve observations by introducingcorrections, where possible. To date, there is no standard procedure to adjust for such deviations. This report proposes a series of alternatives based on possible scenarios for deviations from the intended intake of radio-opaque markers. The proposed method to correct for missed or delayed consumption of radioopaque markers can help to increase the accuracy of the cTT measurements in clinical trials.

关键词： colonic transit time Gastroenterology Gut transit time Radio-opaque marker X-ray

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