维普中文期刊产品整合服务
10016篇 您的检索式:作者名="LIN D"
    题名 作者 年代 出处 被引量
12019新型冠状病毒基因组特征和流行病学:病毒起源和受体结合的意义显示文摘研究者对来自9例新型冠状病毒肺炎住院患者的支气管肺泡灌洗液样本和培养的分离株进行了下一代测序。从这些个体中获得了严重急性呼吸综合征-冠状病毒2(severe acute respiratory syndrome-coronavirus 2,SARS-CoV-2)的完整和部分基因组序列。利用Sanger测序连接病毒重叠群以获得全长基因组,cDNA末端快速扩增确定终端区。对这些SARSCoV-2基因组和其他冠状病毒基因组进行了系统进化分析,以确定该病毒的进化史并有助于推断其可能的起源。刘青(译) 刘莉(审校) Lu R Zhao X Li J Niu P Yang B Wu H Wang W Song H Huang B Zhu N Bi Y Ma X Zhan F Wang L Hu T Zhou H Hu Z Zhou W Zhao L Chen J Meng Y Wang J Lin Y Yuan J Xie Z Ma J Liu WJ Wang D Xu W Holmes EC Gao GF Wu G Chen W Shi W Tan W 2020中华高血压杂志2020,28,3:516
2Recent advances in endovascular techniques for management of acute nonvariceal upper gastrointestinal bleeding显示文摘Over the past two decades,transcatheter arterial embolization has become the first-line therapy for the management of upper gastrointestinal bleeding that is refractory to endoscopic hemostasis.Advances in catheter-based techniques and newer embolic agents, as well as recognition of the effectiveness of minimally invasive treatment options,have expanded the role of interventional radiology in the management of hemorrhage for a variety of indications,such as peptic ulcerbleeding,malignant disease,hemorrhagic Dieulafoy lesions and iatrogenic or trauma bleeding.Transcatheter interventions include the following:selective embolization of the feeding artery,sandwich coil occlusion of the gastroduodenal artery,blind or empiric embolization of the supposed bleeding vessel based on endoscopic findings and coil pseudoaneurysm or aneurysm embolization by three-dimensional sac packing with preservation of the parent artery.Transcatheter embolization is a fast,safe and effective,minimally invasive alternative to surgery when endoscopic treatment fails to control bleeding from the upper gastrointestinal tract.This article reviews the various transcatheter endovascular techniques and devices that are used in a variety of clinical scenarios for the management of hemorrhagic gastrointestinal emergencies.Romaric F Loffroy Basem A Abualsaud Ming D Lin Pramod P Rao 2011World Journal of Gastrointestinal Surgery2011,3,7:28
3Tectonic evolution of the Dabieshan orogen: In the view from polyphase deformation of the Beihuaiyang metamorphic zone显示文摘The Beihuaiyang metamorphic zone was formed by the Early Mesozoic collision of the North and South China Blocks. It consisted of the Foziling and Luzhenguan complexes and was thought to have never afforded a deep subduction. A similar feature of the deformation in the Dabieshan UHP metamorphic rocks implies that these different tectonic units share the same geodynamic background. The early stage of deformation can be preserved on account of their relatively shallower subduction than that for UHP rocks. On the basis of an analysis of the geo- logical structure and geochronological results, five deformational stages have been recognized: a D1-Early compressional deformation which represents the continental subduction; a D2-Early exhumation deformation producing a syn-convergence exhumation; a D3-Main deformation, represented by an exhumation deformation with Late Triassic age; a D4-Doming and its margin extensional gravity collapse deformation and finally a D5-regional extensional deformation of Cretaceous that was mostly introduced by the migmatization and plutonism.LIN Wei1, 2, Faure Michel3, WANG Qingchen1 & Arnaud Nicolas4 1. LTE, Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing 100029, China 2. Department of Earth and Planetary Sciences, Graduate School of Science, Nagoya University, Japan 3. ISTO, UMR CNRS 6113, Batiment Géosciences, Orléans Université d’Orléans, 45067 Orléans Cedex 2, France 4. UMR 6524 'Magmas et Volcans', 5 Rue Kessler, 63000 Clermont-Ferrand, France 2005Science China Earth Sciences2005,48,7:25
4Mycoplasma infections and different human carcinomas显示文摘AIM To explore relationships between human carcinomas and mycoplasma infection.METHODS Monoclonal antibody PD4, which specifically recognizes a distinct protein from mycoplasma hyorhinis, was used to detect mycoplasma infection in different paraffinembedded carcinoma tissues with immunohistochemistry. PCR was applied to amplify the mycoplasma DNA from the positive samples for confirming immunohistochemistry.RESULTS Fifty of 90 cases (56%) of gastric carcinoma were positive for mycoplasma hyorhinis. In other gastric diseases, the mycoplasma infection ratio was 28% (18/49) in chronic superficial gastritis, 30% (14/ 46) in gastric ulcer and 37% (18/ 49) in intestinal metaplasia. The difference is significant with gastric cancer (X2=12.06, P<0.05). In colon carcinoma, the mycoplasma infection ratio was 55.1% (32/58), but it was 20.9% (10/49) in adenomarous polyp (X2=13.46, P<0.005).Gastric and colon cancers with high differentiation had a higher mycoplasma infection ratio than those with low differentiation (P< 0.05). Mycoplasma infection in esophageal cancer, lung cancer, breast cancer and glioma was 50.9% (27/53), 52.6% (31/ 59), 39.7%(25/63) and 41% (38/91), respectively. The mycoplasma DNA was successfully amplified with the DNA extracted from the cancer tissues that were positive for mycoplasma infection (detected with antibody PD4).CONCLUSION There was high correlation between mycoplasma infection and different cancers, which suggests the possibility of an association between the two. The mechanism involved in oncogenesis by mycoplasma remains unknown.Su Huang Ji You Li Jan Wu Lin Meng Cheng Chao Shou Beijing Institute for Cancer Research, Peking University School of Oncology, Beijing 100034. ChinaSu Huang, received B. A from Jiangxi Medical College of China in 1994. Now she is a graduate student pursuing a Ph. D degree at the Peking University School of Oncology. 2001World Journal of Gastroenterology2001,7,2:18
5Allergen micro-array detection of specific IgE-reactivity in Chinese allergy patients显示文摘背景变应原微数组是为浆液 IgE-reactivity.In 屏蔽这学习变应原的强大的工具微数组被用来鉴别在选择中国过敏症 patients.Methods 之中统治IgE有约束力的变应原和跨反应的模式学习从广州的城市用耐心的 sera 被进行,南京,有 Dermatophagoides pteronyssinus ( Der p )的 Chengdu 和 Shenyang.In 总数 100 sera 比 50 kU/L 高的特定的IgE水平为对 103ZHENG Yi-wu LI Jing LAI Xu-xin ZHAO De-yu LIU Xiao-fan LIN Xiao-ping Birgitte Gjesing Paola Palazzo Adriano Mari ZHONG Nan-shan Michael D Spangfort 2011Chinese Medical Journal2011,,24:16
6Calcium phosphate cements for bone engineering and their biological properties显示文摘Calcium phosphate cements(CPCs) are frequently used to repair bone defects. Since their discovery in the 1980 s, extensive research has been conducted to improve their properties, and emerging evidence supports their increased application in bone tissue engineering. Much effort has been made to enhance the biological performance of CPCs, including their biocompatibility, osteoconductivity, osteoinductivity, biodegradability,bioactivity, and interactions with cells. This review article focuses on the major recent developments in CPCs,including 3 D printing, injectability, stem cell delivery, growth factor and drug delivery, and prevascularization of CPC scaffolds via co-culture and tri-culture techniques to enhance angiogenesis and osteogenesis.Hockin HK Xu Ping Wang Lin Wang Chongyun Bao Qianming Chen Michael D Weir Laurence C Chow Liang Zhao Xuedong Zhou Mark A Reynolds 2017Bone Research2017,5,4:14
7Existing drugs as broad-spectrum and potent inhibitors for Zika virus by targeting NS2B-NS3 interaction显示文摘Zika 病毒(ZIKV ) 的最近的爆发为治疗学加亮迫切需要。朊酶建筑群 NS2B-NS3 在 flaviviral polyprotein 处理期间起必要作用,并且因此代表一个吸引人的药目标。这里,我们开发了裂口酶识别直接指向 flavivirus NS2B-NS3 相互作用的 orthosteric 禁止者的基于互补的高产量的屏蔽试金。由屏蔽一个总数 2 816 同意了并且 investigational 药,我们识别了三个有势力候选人, temoporfin, niclosamide,和 nitazoxanide,,有 nanomolar 力量的 flavivirus NS2B-NS3 相互作用禁止者。显著地,在老鼠的在人的胎盘、神经的祖先房间的大多数有势力化合物, temoporfin,不是仅仅禁止的 ZIKV 复制,而且阻止的导致 ZIKV 的 viremia 和死亡当模特儿。结构的停靠建议 temoporfin 潜在地绑保持批评 NS2B 残余的 NS3 衣袋,因此禁止以一种非竞争的方式处理的 flaviviral polyprotein。当这些药已经在 USA 或另外的国家在另外的指示任何一个为临床的使用被同意了,他们由 ZIKV 和另外的 flaviviruses 为感染的管理代表有希望、容易开发的治疗。Zhong Li Matthew Brecher Yong-Qiang Deng Jing Zhang Srilatha Sakamuru Binbin Liu Ruili Huang Cheri A Koetzner Christina A Allen Susan A Jones Haiying Chen Na-Na Zhang Min Tian Fengshan Gao Qishan Lin Nilesh Banavali Jia Zhou Nathan Boles Menghang Xia Laura D Kramer Cheng-Feng Qin Hongmin Li 2017Cell Research2017,27,8:11
8A STUDY OF STRUCTURE AND PROPERTY CHANGES OF BIODEGRADABLE POLYGLYCOLIDE AND POLY(GLYCOLIDE-co-LACTIDE)FIBERS DURING PROCESSING AND IN VITRO DEGRADATION显示文摘Structure and properties of bioabsorbable polyglycolide (PGA) and poly(glycolide-co-lactide) (PGA-co-PLA)fibers were investigated during several industrial processing stages and in vitro degradation by means of wide-angle X-ray diffraction (WAXD), dynamic mechanical analysis (DMA) and mechanical property tests. In the orientation stage, the PGA fibers were found to have higher degrees of crystallinity than corresponding PGA-co-PLA samples produced under similar conditions. In the hot-stretching and post-annealing stages, after fibers were braided, PGA samples were found to gain more crystallinity and higher Tg than PGA-co-PLA samples. The higher crystallinity in PGA fibers resulted in a slower rate of degradation. DMA results showed that a great deal of internal stress that was built during orientation and hot-stretching stages was released in the post-annealing stage for all PGA and PGA-co-PLA samples. During earlier stages ofin vitro degradation, both PGA and PGA-co-PLA samples exhibited the typical cleavage-induced crystallization mechanism. The heat shrinkage in the glass transition area was found to disappear after 6-8 days of degradation for all PGA and PGA-co-PLA samples, indicating the amorphous portions of the polymers lost orientation after a short period in the buffer solution, most likely due to relaxation of the cleaved chains.Bruce X.Fu Benjamin S.Hsiao Gavin Chen Jack Zhou Susan Lin Jenny Yuan Ilya Koyfman Dennis D Jamiolkowski Edward Dormier 2003Chinese Journal of Polymer Science2003,21,2:9
9Serial imaging of human embryonic stem-cell engraftment and teratoma formation in live mouse models显示文摘表示为基于 radiopharmaceutical 的成像为生物体之发光成像或 HSV1 thymidine kinase (HSV1-TK ) 编码任何一个萤火虫酶(fLuc ) 的记者 transgene 的 lentiviral 向量的二种新类型被构造监视人的胚胎的干细胞(hESC ) 在在移植以后的活老鼠的嫁接和增长。任何一个 transgene 的组成的表示没在文化改变 hESCs 的性质。我们下次在 SCID 鼠标监视了 teratomas 的形成到测试(1 ) 是否修改基因的 hESCs 维持他们的发展 pluripotency,并且(2 ) 是否支撑了记者基因表示,允许 noninvasive,在一个活鼠标模型的 hESC 衍生物的整个身体的成像。我们在接种以后从修改基因的房间以及野类型的 hESCs 2-4 月的两种类型观察了 teratoma 形成。用一个光成像系统,从 fLuc-transduced hESCs 的生物体之发光容易在在摸得出的肿瘤能被检测以前,长忍受 teratomas 的老鼠被检测。开发一个 noninvasive 成像方法对诊所更容易地可译,我们也利用了 HSV1-TK 和它的特定的底层, 1-(2 鈥 ? deoxy-2 鈥 ?fluoro- 尾 - D-arabinofuranosyl )-5-[125I]iodouracil ([125I ] FIAU ) ,记者 / 探查对。在全身的管理以后,[125I ] FIAU 是仅仅由编码 transgene 的 HSV1-TK 酶的 phosphorylated 并且在 transduced 以内保留(并且移植) 房间,由单个光子的排放允许敏感、量的成像计算了断层摄影术。象这些那样的 Noninvasive 成像方法可以使我们能在实时接受者以内重复地监视移植人的干细胞的存在和分发在上一通过记者基因的表达式长期。Martin G Pomper Holly Hammond Xiaobing Yu Zhaohui Ye Catherine A Foss Doris D Lin James J Fox Linzhao Cheng 2009Cell Research2009,19,3:9
10Differential effects of glutamate receptor antagonists on dorsal horn neurons responding to colorectal distension in a neonatal colon irritation rat model显示文摘AIM: To investigate and compare the effects of spinal D-(-)-2-amino-7-phosphonoheptanoic acid (AP-7) and 6-cyano-7-nitroquinoxaline-2,3-dione disodium (CNQX),two glutamate receptor antagonists, on the responses of dorsal horn neurons to colorectal distension (CRD) in adult rats exposed to neonatal colon irritation (CI).METHODS: Hypersensitive SD rats were generated by CI during postnatal days 8, 10 and 12. Experiments on adult rats were performed using extracellular single-unit recording. The effects of spinal application of AP-7 (0.001,0.01, 0.1, 1 mmoL) were tested on the CRD-evoked neuronal responses in 16 controls and 17 CI rats. The effects of CNQX (0.2, 2, 5, 10 μmoL) were also tested on the CRD-evoked responses of 17 controls and 18 CI neurons.RESULTS: (1) The average responses of lumbosacral neurons to all intensities of CRD in CI rats were significantly higher than those in control rats; (2) In control rats, AP-7 (0.01 mmoL) had no significant effect on the neuronal response to all intensities of CRD (20,40, 60, 80 mmHg); while AP-7 (0.1 mmoL) inhibited the neuronal response to 80-mmHg CRD. By contrast, in CI rats, AP-7 (0.01-1 mmoL) attenuated the CRD-evoked neuronal responses to all distention pressures in a dosedependent manner; (3) In control rats, CNQX (2 μmoL)had no significantly effect on the neuronal response to all intensities of CRD; however, CNQX (5 μmoL) significantly attenuated the responses to CRD in the 40-80 mmHg range. By contrast, CNQX (2-10 μmoL)significantly decreased the neuronal responses in CI rats to non-noxious and noxious CRD in a dose-dependent manner.CONCLUSION: Our results suggest that spinal N-methyl-D-aspartate (NMDA) and non-NMDA receptors may contribute to the processing of central sensitivity in a neonatal CI rat model, but they may play different roles in it.Chun Lin Elie D Al-Chaer 2005World Journal of Gastroenterology2005,11,41:7
11A draft sequence of the rice (Oryza sativa ssp. indica) genome显示文摘The sequence of the rice genome holds fundamental information for its biology, including physiology, genetics, development, and evolution, as well as information on many beneficial phenotypes of economic significance. Using a 'whole genome shotgun' approach, we have pro-duced a draft rice genome sequence of Oryza sativa ssp. in-dica, the major crop rice subspecies in China and many other regions of Asia. The draft genome sequence is constructed from over 4.3 million successful sequencing traces with an accumulative total length of 2214.9 Mb. The initial assembly of the non-redundant sequences reached 409.76 Mb in length, based on 3.30 million successful sequencing traces with a total length of 1797.4 Mb from an indica variant cultivar 93-11, giving an estimated coverage of 95.29% of the rice genome with an average base accuracy of higher than 99%. The coverage of the draft sequence, the randomness of the sequence distribution, and the consistency of BIG-ASSEM-BLER, a custom-designed software packageYU Jun, HU Songnian, WANG Jun,LI Songgang WONG Ka-Shu Gane, LIU Bin,DENG Yajun, DAI Li, ZHOU Yan,ZHANG Xiuqing, CAO Mengliang, LIU Jing,SUN Jiandong , TANG Jiabin, CHEN Yanjiong,HUANG Xiaobing, LIN Wei, YE Chen, TONG Wei,CONG Lijuan, GENG Jianing, HAN Yujun, LI Lin,LI Wei, HU Guangqiang, HUANG Xiangang,LI Wenjie, LI Jian, LIU Zhanwei, LI Long,LIU Jianping, Ql Qiuhui, LIU Jinsong, LI Li,WANG Xuegang, LU Hong, WU Tingling,ZHU Miao, Nl Peixiang, HAN Hua, DONG Wei,REN Xiaoyu, FENG Xiaoli, GUI Peng,LI Xianran, WANG Hao, XU Xin, ZHAI Wenxue,XU Zhao, ZHANG Jinsong, HE Sijie,ZHANG Jianguo, XU Jichen, ZHANG Kunlin,ZHENG Xianwu, DONG Jianhai, ZENG Wanyong,TAO Lin, CHEN Xuewei, HE Jun, LIU Daofeng,TIAN Wei, TIAN Chaoguang, XIA Hongai,LI Gang, GAO Hui, LI Ping, CHEN Wei ,WANG Xudong, ZHANG Yong, HU Jianfei,WANG Jing, LIU Song, YANG Jian,ZHANG Guangyu, XIONG Yuqing, LI Zhijie,MAO Long, ZHOU Chengshu, ZHU Zhen,CHEN Runsheng, HAO Bailin,ZHENG Weimou, CHEN Shouyi, QUO Wei,LI Guojie, LIU Siqi, HUANG Guyang,TAO Ming, WANG Jian, ZHU Lihuang,YUAN Longping& YANG HuanmingBeijing Genomics Institute/Center of Genomics & Bioinformatics, Chinese Academy of Sciences, Beijing 101300, China Hangzhou Genomics Institute/Institute of Bioinformatics of Zhejiang University/Key Laboratory of Bioinformatics of Zhejiang Province, Hangzhou 310007, China Institute of Genetics, Chinese Academy of Sciences, Beijing 100101, China National Hybrid Rice R & D Center, Changsha 410125, China Laboratory of Bioinformatics, Institute of Biophysics, Chinese Academy of Sciences, Beijing 100101, China College of Life Sciences, Peking University, Beijing 100871, China Institute of Theoretical Physics, Chinese Academy of Sciences, Beijing 1Q0080, China Digital China Ltd., Beijing 100080, China Institute of Computing Technology, Chinese Academy of Sciences, Beijing 100080, China Medical College, Xi’an Jiaotong University, Xi’an 710061, ChinaThese authors contributed equally to this work.Corresponding author.Corresponden 2001Chinese Science Bulletin2001,46,23:6
12Topological and evolutional relationships between HCV core protein and hepatic lipid vesicles: Studies in vitro and in conditionally transgenic mice显示文摘AIM: To investigate a specific association between hepatic steatosis and hepatitis C virus (HCV) core. METHODS: HeLa cells and primary mouse hepatocytes were transfected with HCV core plasmid, and conditional transgenics in which hepatic over-expression of HCV core is regulated by the tetracycline-off system, were developed. The expression of the HCV core was assessed over one to six months after withdrawal of doxycycline (dox) by immunohistochemistry (IHC) and Western blotting and by sequential liver biopsy. Hepatic steatosis was evaluated using oil red stain. 8-hydroxydeoxyguanosine (8-OHdG) stains and caspase levels were conducted to clarify hepatic oxidative stress and apoptosis rate. Serum aminotransferase was checked. RESULTS: The transfected hepatocytes had globular cores under the lipid vesicles. In transgenic mice on control diet, core expression was robust, localized to the cytoplasmic vesicle membrane and strongly associatedwith microvesicular steatosis, which was gradually replaced by macrovesicular steatosis. However, both steatosis and core positive hepatocytes diminished with time. Increases in aminotransferase, caspase and 8-OHdG were associated with peak core expression. CONCLUSION: The core protein was readily detected and morphologically associated with steatosis in individual hepatocytes both in vitro and in vivo. In vivo, oxidative stress caused by the core potentially reduced the number of core positive hepatocytes and in parallel the level of steatosis. To our knowledge, this is the f irst animal model that directly shows topological relationship between HCV core and hepatic lipid vesicles.Ming-Ling Chang Jeng-Chang Chen Chau-Ting Yeh I-Shyan Sheen Dar-In Tai Ming-Yu Chang Cheng-Tang Chiu Deng-Yn Lin D Montgomery Bissell 2007World Journal of Gastroenterology2007,13,25:4
13Primer containing dimethylaminododecyl methacrylate kills bacteria impregnated in human dentin blocks显示文摘Antibacterial dimethylaminododecyl methacrylate(DMADDM) was recently synthesized. The objectives of this study were to:(1)investigate antibacterial activity of DMADDM-containing primer on Streptococcus mutans impregnated into dentin blocks for the first time, and(2) compare the antibacterial efficacy of DMADDM with a previous quaternary ammonium dimethacrylate(QADM).Scotchbond Multi-Purpose(SBMP) bonding agent was used. DMADDM and QADM were mixed into SBMP primer. Six primers were tested: SBMP control primer P, P+2.5% DMADDM, P+5% DMADDM, P+7.5% DMADDM, P+10% DMADDM, and P+10% QADM.S. mutans were impregnated into human dentin blocks, and each primer was applied to dentin to test its ability to kill bacteria in dentinal tubules. Bacteria in dentin were collected via a sonication method, and the colony-forming units(CFU) and inhibition zones were measured. The bacterial inhibition zone of P+10% DMADDM was 10 times that of control primer(Po0.05). CFU in dentin with P+10% DMADDM was reduced by three orders of magnitude, compared with control. DMADDM had a much stronger antibacterial effect than QADM, and antibacterial efficacy increased with increasing DMADDM concentration. Dentin shear bond strengths were similar among all groups(P40.1). In conclusion, antibacterial DMADDM-containing primer was validated to kill bacteria inside dentin blocks, possessing a much stronger antibacterial potency than the previous QADM. DMADDM-containing bonding agent was effective in eradicating bacteria in dentin, and its efficacy was directly proportional to DMADDM mass fraction. Therefore, DMADDM may be promising for use in bonding agents as well as in other restorative and preventive materials to inhibit bacteria.Chen Chen Lei Cheng Michael D Weir Nancy J Lin Sheng Lin-Gibson Xue-Dong Zhou Hockin HK Xu 2016International Journal of Oral Science2016,8,4:4
14SCC MECHANISM OF STAINLESS STEEL AISI 321 IN ACIDIC CHLORIDE SOLUTION显示文摘It is verified that stainless steel AISI 321 is in the active anodic dissolution state in 0.5mol/L HCll+0.5 mol/L NaCl solution at 55℃.The SCC of the steel in the solution cannot be reasonably explained by passive film rupture-nepasivation theory and by hydrogenembrittlement theory.There are evidences that the fracture stress at the tip of the cracksis reduced by anodic dissolution due to its role in relieving strain hardening layer at cracktip.HUANG Yanliang CAO Chu’nan LIN Haichao LU Ming Corrosion Science Laboratory,Institute of Corrosion and Protection of Metals,Academia Sinica,Shenyang,China Ph D student,Institute of Corrosion and Protection of Metals,Academia Sinica,Shenyang 110015,China 1993Acta Metallurgica Sinica(English Letters)1993,6,12:3
15欧洲和中国的心脏与肾脏远程缺血预适应研究:一项随机对照试验显示文摘远程缺血预适应(remote ischemic preconditioning,RIPC)对经皮冠状动脉介入治疗(percutaneous coronary intervention,PCI)术后造影剂肾病(contrast-induced nephropathy,CIN)的潜在保护作用尚待确定。该研究为双盲、随机、安慰剂对照的多中心研究,纳入年龄〈85岁,肾清除率为30~60mL/(min·1.73m^2)的有临床适应证的患者,除了直接PCI外均按1∶1给予RIPC或标准治疗。主要终点是CIN的发生率。次要终点是围手术期心肌梗死(peri-procedural myocardial infarction,PMI)的发生率。刘青 叶鹏 Moretti C Cerrato E Cavallero E Lin S Rossi ML Picchi A Sanguineti F Ugo F Palazzuoli A Bertaina M Presbitero P Shao-Liang C Pozzi R Giammaria M Limbruno U Lefèvre T Gasparetto V Garbo R OmedèP Sheiban I Escaned J Biondi-Zoccai G Gaita F Perl L D'Ascenzo F 2018中华高血压杂志2018,26,4:3
16Novel rechargeable calcium phosphate nanoparticle-containing orthodontic cement显示文摘White spot lesions(WSLs), due to enamel demineralization, occur frequently in orthodontic treatment. We recently developed a novel rechargeable dental composite containing nanoparticles of amorphous calcium phosphate(NACP) with long-term calcium(Ca) and phosphate(P) ion release and caries-inhibiting capability. The objectives of this study were to develop the first NACPrechargeable orthodontic cement and investigate the effects of recharge duration and frequency on the efficacy of ion re-release.The rechargeable cement consisted of pyromellitic glycerol dimethacrylate(PMGDM) and ethoxylated bisphenol A dimethacrylate(EBPADMA). NACP was mixed into the resin at 40% by mass. Specimens were tested for orthodontic bracket shear bond strength(SBS) to enamel, Ca and P ion initial release, recharge and re-release. The new orthodontic cement exhibited an SBS similar to commercial orthodontic cement without CaP release(P40.1). Specimens after one recharge treatment(e.g., 1 min immersion in recharge solution repeating three times in one day, referred to as '1 min 3 times') exhibited a substantial and continuous re-release of Ca and P ions for 14 days without further recharge. The ion re-release did not decrease with increasing the number of recharge/re-release cycles(P40.1). The ion re-release concentrations at 14 days versus various recharge treatments were as follows: 1 min 3 times43 min 2 times41 min 2 times46 min 1 time43 min 1 time41 min 1 time. In conclusion, although previous studies have shown that NACP nanocomposite remineralized tooth lesions and inhibited caries, the present study developed the first orthodontic cement with Ca and P ion recharge and long-term release capability. This NACP-rechargeable orthodontic cement is a promising therapy to inhibit enamel demineralization and WSLs around orthodontic brackets.Xian-Ju Xie Dan Xing Lin Wang Han Zhou Michael D Weir Yu-Xing Bai Hockin HK Xu 2017International Journal of Oral Science2017,9,1:3
17Charge control and mobility studies for an AlGaN/GaN high electron mobility transistor显示文摘Zhang Y Zhang H B Lin G D Chen P, Yuan Y Z, Tsai K R 0,,:3
18Calcium intake effects on two year changes in body composition in young women显示文摘LIN Y C LYLE R M MCCABE I D 2000Journal of American College of Nutrition2000,19,:2
19全颗粒饲料对奶牛生产性能的影响显示文摘饲料中的中性洗涤纤维(NDF)含量和饲料颗粒直径是影响瘤胃功能的重要因素。试验评估了以颗粒饲料为主的奶牛瘤胃健康情况、NDF消化率和生产性能。选取8头荷斯坦母牛(336±30 d,体重346±35 kg),随机分配到交叉重复试验组中,奶牛安置于牛栏,自由采食。试验期为3周,前两周是适应期,最后一周为数据收集期。各组饲粮原料相同,但物理形式不同,分为全混合日粮(TMR)和颗粒料(直径=8 mm)。两组间物理有效NDF(pe NDF)不同,TMR组为39.8%,颗粒料组为11.8%。在试验过程中,干物质采食量(DMI)、饮水量、瘤胃反刍时间、瘤胃温度和pH情况均记录。3周后收集粪样,确定潜在的可消化NDF总消化率(pdNDF)。每阶段结束后计算平均日增重和饲料转化率。颗粒料组的DMI、DMI/体重和饮水量更高。而两组间平均日增重和饲料转化率无显著差异。颗粒料组的瘤胃反刍时间为241 min·d-1低于TMR组的507 min·d-1。饲料的不同物理外形对瘤胃温度、瘤胃pH无显著影响。TMR组的pdNDF总消化率为90.25%高于颗粒料组的86.82%。试验结果表明,动物易接受完整的颗粒饲料,DMI较高,且反刍时间减少,但瘤胃pH无显著变化。TMR组的pdNDF消化率显著增加。尽管两组奶牛在DMI和纤维消化方面表现不同,但总体表现相似,两组饲料的保存时间与其物理形式有关。在短期内,提供能满足NDF需求的完全颗粒饲料可改善瘤胃健康状况和动物生产性能,而较长时间的数据则需要进一步试验。Wang J Yang M Cao M Lin Y Che L Q Duraipandiyan V Al-Dhabi N A Fang Z F Xu S Y Feng B Liu G Wu D Bonfante E Palmonari A Mammi L Canestrari G Fustini M Formigoni A 2016饲料博览2016,0,12:2
20A hierarchical genetic algorithm for the TSP 显示文摘Lin W Delgado-Frias J G Gause D C 1996Mathematical Modeling and Scientic Computing1996,6,:2
返回顶部 每页显示:
共501页 首页 上一页 第1页 下一页 末页 /501 跳转

网站首页 | 关于我们 | 联系我们 | 产品服务 | 客服中心 | 广告服务 | 版权声明 | 网站联盟 | 友情链接 | 售卡网点

版权所有© 渝B2-20050021-1 渝公网安备 50019002500403号 违法和不良信息举报中心

互联网出版许可证 新出网证(渝)字10号 全国400电话 - 免长途话费