检索结果-南通市图书馆

AN ATTRIBUTION OF CAVITATION RESONANCE:VOLUMETRIC OSCILLATIONS OF CLOUD

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Hydrodynamics 2009年第2期21卷 152-158页

作者： ZUO zhi-gang LI Sheng-cai LIU Shu-hong LI Shuang CHEN Hui School of Engineering University of Warwick Coventry CV4 7AL UK Department of Thermal Engineering Tsinghua University Beijing 100084 China School of Engineering University of Warwick Coventry CV4 7AL UK School of Power and Energy Northwestern Polytechnical University Xi＇ an 710072 China

In order to further verify the proposed theory of cavitation resonance, as well as to proceed the investigations into microscopic level, a series of studies are being carried out on the Warwick venturi. The analysis of the oscillation characteristics of the cavitation resonance has conclusively verified the macro-mechanism proposed through previous studies on other cavitating flows by the authors. The initiai observations using high-speed photographic approach have revealed a new attribution of cavitation resonance. That is, the volumetric oscillation of cavitation cloud is associated with the cavitation resonance, which is a collective behaviour of the bubbles in the cloud.

关键词： cavitation resonance volumetric oscillation macro-mechanism

Botulinum toxin A inhibits salivary secretion of rabbit submandibular gland

在线全文

学校读者我要写书评

暂无评论

International Journal of Oral Science 2013年第4期5卷 217-223页

作者： Xiao-Feng Shan Hui Xu zhi-gang cai Li-Ling Wu Guang-Yan Yu Department of Oral and Maxillofacial Surgery Peking University School and Hospital of Stomatology Department of Physiology and Pathophysiology Peking University Health Science Center

Botulinum toxin A （BTXA） has been used in several clinical trials to treat excessive glandular secretion; however, the precise mechanism of its action on the secretory function of salivary gland has not been fully elucidated. In this study, we aimed to investigate the effect of BTXA on secretion of submandibular gland in rabbits and to identify its mechanism of action on the secretory function of salivary gland. At 12 weeks after injection with 5 units of BTXA, we found a significant decrease in the saliva flow from submandibular glands, while the salivary amylase concentration increased. Morphological analysis revealed reduction in the size of acinar cells with intracellular accumulation of secretory granules that coalesced to form a large ovoid structure. Expression of M3-muscarinic acetylcholine receptor （M3 receptor） and aquaporin-5 （AQP5） mRNA decreased after BTXA treatment, and distribution of AQP5 in the apical membrane was reduced at 1, 2 and 4 weeks after BTXA injection. Furthermore, BTXA injection was found to induce apoptosis of acini. These results indicate that BTXA decreases the fluid secretion of submandibular glands and increases the concentration of amylase in saliva. Decreased expression of M3 receptor and AQP5, inhibition of AQP5 translocation, and cell apoptosis might involve in BTXA-reduced fluid secretion of submandibular lands.

关键词： aquaporin-5 apoptosis botulinum toxin A M3-muscarinic acetylcholine receptor submandibular gland

Synthesis, Structure and Non-linear Optical Properties of Iron Mercury Tetrathiocyanate

在线全文

学校读者我要写书评

暂无评论

Chinese Chemical Letters 1998年第12期9卷 0-0,0-0页

作者： Yun Xing YAN Qi FANG Wen Tao YU Yu Peng TIAN Duo Rong YUAN Xin Qiang WANG Fan Qing MENG (Institute of Crystal Materials and State Key Laboratory of Crystal Materials,Shandong University, Jinan, 250100)zhi gang cai Ling zhi ZHANG (Institute of Laser Shandong Univ Inst Crystal Mat Jinan 250100 Peoples R China Shandong Univ State Key Lab Crystal Mat Jinan 250100 Peoples R China Zhongshan Univ Inst Laser Spect Guangzhou 510275 Peoples R China Zhongshan Univ State Key Lab Ultrafast Laser Spect Guangzhou 510275 Peoples R China

Iron Mercury Tetrathiocyanate (FeHg(SCN)4) has been synthesized and its structure hasbeen detendned. It belongs to the tetragonal system, 14 space group. The Hg-S-C=N-Fe bridgeleeds to the formation of an infinite three dimensional network. Irrsdiated by a 1.064 nm Nd:YAG laser beam, FeHg(SCN)4 showed a 0.532 nm second harmonic intensity which is 0.6 times asthat of organic nonlinear optical crystal urea.

关键词： FeHg(SCN)_4 synthesis structure nonlinear property

Synthesis, Structure and Non-linear Optical Properties of Manganese Mercury Tetrathiocyanate

在线全文

学校读者我要写书评

暂无评论

Chinese Chemical Letters 1999年第3期10卷 257-260页

作者： Yun Xing YAN Qi FANG Duo Rong YUAN Yu Peng TIAN zhi LIU Xiao MeiWANG Min Hua JIANG D. WILLIAMS A. SIU zhi gang cai (Institute of Crystal Materials and State Key Laboratory of Crystal Materials,Shandong University. Jinan 250100)(Department of Chem Shandong Univ Inst Crystal Mat Jinan 250100 Peoples R China Shandong Univ State Key Lab Crystal Mat Jinan 250100 Peoples R China Hong Kong Univ Sci & Technol Dept Chem Hong Kong Peoples R China Zhongshan Univ Inst Laser Spect Guangzhou 510275 Peoples R China Zhongshan Univ State Key Lab Ultrafast Lase Spect Guangzhou 510275 Peoples R China

The title copound Manganese Mercury Tetrathiocyanate (MnHg (SCN)(4)) has been synthesized and its structure has been determined. It belongs to tetragonal system, I (4) over bar space group. The cell dimensions are: a = 1.1324 (3) nm, c = 0.4270 (2) nm, V = 0.5475 (3) nm(3), Z = 2, D-c = 2.959 g/cm(3), R = 0.028, R-w = 0.037. The structure feature of the crystal is the Hg-S-C=N-Mn bridge which leads to the formation of an infinite three dimensional network. Irradiated by a 1064 nm Nd:YAG laser beam, MnHg (SCN), shows a 532 nm second harmonic intensity which is 18 times as that of organic nonlinear optical crystal urea, and therefore shows a quite promising application value as a useful nonliear optical material.

关键词： MnHg (SCN)(4) synthesis structure nonlinear optical property

The protection, study and utilization of kenaf （Hibiscus cannabinus） germplasm in China

在线全文

学校读者我要写书评

暂无评论

Journal of Life Sciences 2007年第1期1卷 73-81页

作者： SU Jian-guang DAI zhi-gang GONG You-cai CHEN Ji-quan Institute of Bast Fiber Crops Chinese Academy of Agricultural Sciences Changsha 410006 China

China is one of the largest kenaf production countries in the world, and kenaf is an important fiber crop in our country. With the recognition and finance support from Chinese government, we have got the great achievements in the fields of conservation, evaluation, and utilization of kenaf germplasm. China has got much attention in the word because of having the largest kenaf germplasm gene bank. The germplasm resources of kenaf have played an important role in promoting breeding and development of production in the past years. This paper reviewed the status of kenaf production, collection and conservation, utilization of kenaf germplasm, in the study and utilization of put forward strategies of utilization .This will provide kenaf industry. evaluation, innovation and we also discussed the problems genetic diversity of kenaf, and sustained development and available experiences for the

关键词： kenaf germplasm protection study utilization genetic diversity

口腔种植体周围炎龈下菌群分布及药物敏感性分析

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

中国病原生物学杂志 2018年第2期13卷 196-198页

作者：高文鼎程志钢蔡峰刘甜华中科技大学同济医学院附属武汉中心医院口腔科湖北武汉430000

目的分析口腔种植体周围炎龈下菌群的分布及其药物敏感性。方法从义齿种植牙列缺损患者中选取48例(83枚种植体)发生种植体周围炎者作为炎症组,选取52例(95枚种植体)无种植体周围炎者作为健康组,采集两组患者的龈沟底部标本进行细菌培养... 详细信息

目的分析口腔种植体周围炎龈下菌群的分布及其药物敏感性。方法从义齿种植牙列缺损患者中选取48例(83枚种植体)发生种植体周围炎者作为炎症组,选取52例(95枚种植体)无种植体周围炎者作为健康组,采集两组患者的龈沟底部标本进行细菌培养、菌种鉴定及药物敏感性分析。结果 178份种植体周围标本共检出病原菌310株,其中厌氧菌196株(63.2%),需氧菌88株(28.4%),有益菌26株(8.4%)。厌氧菌中口腔链球菌67株,占分离菌总数的21.6%;中间普雷沃菌52株,占16.8%;牙龈卟啉单胞菌菌44株,占14.2%;具核酸杆菌19株,占6.1%;福赛斯拟杆菌14株,占4.5%。有益菌中血链球菌15株,占分离菌总数的4.8%;小韦荣氏菌11株,占3.5%。炎症组和健康组均以厌氧菌检出率较高,分别为77.1%和53.7%,两组比较厌氧菌检出率差异有统计学意义(χ2=10.603,P<0.05)。196株厌氧菌对青霉素、红霉素、克林霉素、阿莫西林、哌拉西林、氯霉素及甲硝唑耐药率较高(70.4%~93.4%),对环丙沙星、头孢曲松及呋喃妥因耐药率相对较低(17.9%~27.0%),对四环素、万古霉素和米诺环素较敏感(耐药率为1.5%~4.6%)。结论口腔种植体周围炎的发生与龈下厌氧菌增加、菌群失调有关,不同病原菌对抗菌药物的耐药性不同,抗感染治疗时应根据药敏试验结果选择合适药物。

关键词：口腔种植体周围炎种植义齿病原菌药物敏感性耐药性

The application of volume rendering three-dimensional reconstruction of enhanced CT in vascular prediction of autologous submandibular gland transplantation

在线全文

学校读者我要写书评

暂无评论

The application of volume rendering three-dimensional recons...

Application of regional flaps in reconstruction for head neck and maxillofacial defects

中华口腔医学会第14次全国口腔医学学术会议（2012年会）

作者： Hong-kui Yu,Xiao-jing Liu,zhi-peng Sun,zhi-gang cai,Chuan-bin Guo,Jia-zeng Su,Guang-yan Yu Department of Oral and Maxillofacial Surgery,Peking University School and Hospital of Stomatology, Beijing,100081,China

Objective:To evaluate the possibility of pre-operative prediction of whether anterior facial vein(AFV) enters the submandibular gland and the caliber-matching of AFV with temporal veins using volume rendering three-di... 详细信息

关键词： autologous submandibular gland transplantation vascular crisis vascular selection

来源： cnki会议评论

在线全文

cnki会议

学校读者我要写书评

暂无评论

中国口腔颌面外科杂志 2008年第B5期6卷 95-95页

作者： zhi-gang cai Zhang Jie Zhang Jianguo Zhao Fuyun Peking University School and Hospital of Stomatology Beijing100081 China

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

树突状细胞与头颈部鳞癌

医学新知 2021年第3期31卷 204-209页

作者：张馨元蔡志刚谢尚北京大学口腔医学院北京100081 北京大学口腔医院口腔颌面外科北京100081 国家口腔疾病临床医学研究中心北京100081 口腔数字化医疗技术和材料国家工程实验室北京100081 口腔数字医学北京市重点实验室北京100081

头颈部鳞癌是全球较常见恶性肿瘤之一。尽管采取手术、放疗和化疗相结合的综合治疗方式,其5年生存率仍然仅为55%~65%,且预后生活质量欠佳,临床上迫切需要研发新的治疗方法。随着人们对肿瘤免疫微环境的探索,各种免疫治疗相关的临床研究... 详细信息

头颈部鳞癌是全球较常见恶性肿瘤之一。尽管采取手术、放疗和化疗相结合的综合治疗方式,其5年生存率仍然仅为55%~65%,且预后生活质量欠佳,临床上迫切需要研发新的治疗方法。随着人们对肿瘤免疫微环境的探索,各种免疫治疗相关的临床研究备受关注,其中包括树突状细胞的应用。树突状细胞作为抗原提呈细胞,在机体免疫与肿瘤的抗争过程中起着重要作用,与之相关的研究也已在多种恶性肿瘤的治疗中取得一定进展。本综述旨在介绍树突状细胞在头颈部鳞癌中的作用及治疗进展。

关键词：头颈部鳞状细胞癌肿瘤微环境树突状细胞免疫治疗