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946篇 您的检索式:作者名="Crystal"
    题名 作者 年代 出处 被引量
1Liquid Crystal Motion Picture Projector显示文摘LiquidCrystalMotionPictureProjector①SHIYongji(LuoyangTechnologyColege,Luoyang471003,CHN)Abstract:Aliquidcrystalmovingpicturep...SHI Yongji(Luoyang Technology College,Luoyang 471003,CHN)Abstract: A liquid crystal moving picture projector and method are described.Light incident on a liquid crystal display-type device is selectively scattered or transmitted by respective portions of liquid crystal display,and a projection mechanism projects an image formed by either such scattered light or such transmitted light.A liquid crystal moving picture projector includes a liquid crystal display for creating characteristics of an image,and projecttion optics for projecting images sequentially created by the display.The display includes a liquid crystal material capable of temporary storing information at respective areas.The temporary storage may be a function of charge storing directly on liquid crystal material.A method of projecting plural images in sequence includes:creating an image or characteristics of an image in a liquid crystal material,storing such image in such liquid crystal material,directing light at such liquid crystal material,projecting such image as a function of light transmitted through or scattered by such liquid crystal material,and creating a further image in such liquid crystal material for subsequent projection. 1997Semiconductor Photonics and Technology1997,3,3:35
2Research on crystal growth and properties of a new nonlinear optical crystal:Bismuth borate BiB_3O_6显示文摘BiB3O6 (BIBO) single crystals with sizes of 44 mm × 24 mm × 10 mm and weight of 24.7 g have been successfully grown by the top-seeded method. In this note, the preparation of seed, the growth of crystal and some problems encountered are reported. The lattice parameters of BIBO are a =7.1203(7)A, b = 4.9948(7)A, c = 6.5077(7)A, β= 105.586(8) ', V=222.93(5)A3, which were determined by BRUKER-P4 four-circle diffractometer. BIBO is biaxial crystal and the relative orientation of (X, Y, Z) with regard to (a, b, c) is: X|| b, (Y, c) =47.2°, (Z, a) = 31.6°, determined by the X-ray analysis combined with polarized microscopy. The second-harmonic-generation (SHG) conversion efficiency of the sample for 1.064 μm light is up to 67.7%. We have also obtained the third harmonic generation (THG) of 1.064 μm, namely, 1.064 μm + 0.532 μn →0.355 μm. BIBO crystal is free of moisture and hygroscopy.TENG Bing, WANG Jiyang, WANG Zhengping, JIANG Huaidong, SONG Renbo, LIU Hong, HU Xiaobo, LIU Yaogang, WEI Jingqian & SHAO ZongshuState Key Laboratory of Crystal Materials, Shandong University, Ji’nan 250100, China 2001Chinese Science Bulletin2001,46,21:10
3Oncogenic role of leptin and Notch interleukin-1 leptin crosstalk outcome in cancer显示文摘Obesity is a global pandemic characterized by high levels of body fat(adiposity) and derived-cytokines(i.e., leptin). Research shows that adiposity and leptin provide insight on the link between obesity and cancer progression. Leptin's main function is to regulate energy balance. However, obese individuals routinely develop leptin resistance, which is the consequence of the breakdown in the signaling mechanism controlling satiety resulting in the accumulation of leptin. Therefore, leptin levels are often chronically elevated in human obesity. Elevated leptin levels are related to higher incidence, increased progression and poor prognosis of several human cancers. In addition to adipose tissue, cancer cells can also secrete leptin and overexpress leptin receptors. Leptin is known to act as a mitogen, inflammatory and pro-angiogenic factor that induces cancer cell proliferation and tumor angiogenesis. Moreover, leptin signaling induces cancer stem cells, which are involved in cancer recurrence and drug resistance. A novel and complex signaling crosstalk between leptin, Notch and interleukin-1(IL-1) [Notch, IL-1 and leptin crosstalk outcome(NILCO)] seems to be an important driver of leptin-induced oncogenic actions. Leptin and NILCO signaling mediate the activation of cancer stem cells that can affect drug resistance. Thus, leptin and NILCO signaling are key links between obesity and cancer progression. This review presents updated data suggesting that adiposity affects cancer incidence, progression, and response to treatment. Here we show data supporting the oncogenic role of leptin in breast, endometrial, and pancreatic cancers.Crystal C Lipsey Adriana Harbuzariu Danielle Daley-Brown Ruben R Gonzalez-Perez 2016World Journal of Methodology2016,6,1:8
4A review of human carcinogens—Part B: biological agents显示文摘Véronique Bouvard Robert Baan Kurt Straif Yann Grosse Béatrice Secretan Fatiha El Ghissassi Lamia Benbrahim-Tallaa Neela Guha Crystal Freeman Laurent Galichet Vincent Cogliano 2009Lancet Oncology2009,,4:4
5《网络语言学:学生指南》介绍显示文摘《网络语言学:学生指南》(Internet Linguistics : A Student Guide)是英国语言学家David Crystal的新作,由Routledge出版公司于2011年出版。David Crystal 符存 赵静宜 2014当代语言学2014,16,2:4
6Monitoring vegetation phenology using MODIS显示文摘Xiaoyang Zhang Mark A. Friedl Crystal B. Schaaf Alan H. Strahler John C.F. Hodges Feng Gao Bradley C. Reed Alfredo Huete 2002Remote Sensing of Environment2002,,3:4
7Branched chain amino acids alter fatty acid profile in colostrum of sows fed a high fat diet显示文摘Background:Branched chain amino acids(BCAAs)are important substrates for milk protein synthesis in the mammary gland,and are tightly related to lipid metabolism.No study has been performed examining the role of BCAAs with high fat diets on milk fat synthesis.This study was designed to investigate the effect of dietary BCAAs on growth performance of piglets,progeny body weight,and milk fat composition in sows fed a high fat diet.Four diets(CON=control diet;HF=high fat diet with 8%soybean oil;HF-MB=HF plus 0.39%BCAAs;HF-HB=HF plus 0.78%BCAAs)were fed to sows from late gestation to weaning.Results:Compared to HF,BCAAs(HF-MB and HF-HB)increased the litter weight(P<0.05)and overall litter weight gain(P<0.05)at weaning and increased colostrum fat content by 27.3–35.8%(P<0.01).Fatty acid profiles between the two doses of BCAAs were similar.Compared with HF,HF-MB tended to decrease the percentage of C18:3n3(P=0.063)and increased the percentage of C18:1n9c(P=0.03).In addition,BCAAs in HF-MB increased the concentration of total fatty acid by 22.1%in colostrum(P=0.03)but decreased that in serum at parturition by 53.2%(P=0.027).The fatty acids in colostrum that increased with BCAAs were C15:0,C17:0,C20:3n6,C20:4n6,C20:5n3 and C22:6n3(P=0.00~0.04).Colostrum fatty acids of C20:0,C21:0,C22:0,C16:1,C20:1,C18:1n9c also tended to be increased(0.05Chang Ma Yajng Liu Shaoshuai Liu Crystal L.Lévesque Fengqi Zhao Jindong Yin Bing Dong 2020Journal of Animal Science and Biotechnology2020,11,2:3
8Monitoring vegetation phenology using MODIS显示文摘Xiaoyang Zhang Mark A. Friedl Crystal B. Schaaf Alan H. Strahler John C.F. Hodges Feng Gao Bradley C. Reed Alfredo Huete 2002Remote Sensing of Environment2002,,3:2
9How much control causes tunneling? Evidence from China显示文摘We study the dynamic causal effects of the shareholding ratio of controlling shareholder on tunneling behavior in China.We use control-right-transfers as the event to conduct the study.We obtain 394 control-right-transfer samples in China corporate control market from 2001 to 2008.We use related party transactions amount to capture control shareholders’tunneling activities,and make the following findings.Firstly,tunneling behavior is significantly affected by the shareholding ratio of controlling shareholder.Secondly,the relationship between tunneling and shareholding ratio of controlling shareholder takes an N shape(incline-decline-incline).There are at least two turning points in the relationship.Furthermore,firms with shareholding ratios of controlling shareholder that range from 34.46%to 39.01%(8.99–18.04%)exhibit the most(least)severe tunneling.Firm size is significantly positively related to tunneling activities.In addition,the shareholding ratios of the board and the tunneling activities are significantly negatively correlated.These findings imply the shareholding ratio decision of controlling shareholder in control transfers lead to agency problems manifested in China in a particular form of tunneling.Wenting Chen Shanmin Li Crystal Xiaobei Chen 2017China Journal of Accounting Research2017,,3:2
10How robotics is changing and will change the field of colorectal surgery显示文摘During the last decade there has been a significant upward trend in colon and rectal minimally invasive surgery which can be attributed largely to the acceptance of robotic surgery platforms such as the da Vinci?robotic system.The fourth generation da Vinci?system,introduced in 2014,includes integrated table motion,intelligent laser targeted docking and more sophisticated instrumentation and imaging.These developments have enabled more surgeons to efficiently and safely perform multi-quadrant operations.Firefly?technology allows assessment of colon perfusion and identification of ureters,and has shown potential in detecting occult recurrence or metastasis using molecular-labelled tumor markers.Wristed instrumentation has increased the technical ease of intracorporeal anastomosis(ICA)for many surgeons,leading to more common use of ICA during right colectomy.Advanced imaging has shown potential to decrease the incidence of presacral nerve injury and improve urogenital outcomes after pelvic surgery,as has been the case in robotic urologic procedures.Finally,the robotic platform lends itself to surgical simulation for surgical trainees,as a pre-operative tool for mock operations and as an ongoing assessment tool for established colorectal surgeons.Given these advantages,surgeons should anticipate continued and increased utilization of this beneficial technology.Crystal Koerner Seth Alan Rosen 2019World Journal of Gastrointestinal Surgery2019,11,10:2
11Chromodomain-helicase-DNA binding protein 5, 7 and pronecrotic mixed lineage kinase domain-like protein serve as potential prognostic biomarkers in patients with resected pancreatic adenocarcinomas显示文摘Pancreatic cancer is one of the deadliest cancers with a very poor prognosis. Recently, there has been a significant increase in research directed towards identifying potential biomarkers that can be used to diagnose and provide prognostic information for pancreatic cancer. These markers can be used clinically to optimize and personalize therapy for individual patients. In this review, we focused on 3 biomarkers involved in the DNA damage response pathway and the necroptosis pathway: Chromodomainhelicase-DNA binding protein 5, chromodomain-helicaseDNA binding protein 7, and mixed lineage kinase domain-like protein. The aim of this article is to review present literature provided for these biomarkers and current studies in which their effectiveness as prognostic biomarkers are analyzed in order to determine their future use as biomarkers in clinical medicine. Based on the data presented, these biomarkers warrant further investigation,and should be validated in future studies.Crystal S Seldon Lauren E Colbert William A Hall Sarah B Fisher David S Yu Jerome C Landry 2016World Journal of Gastrointestinal Oncology2016,8,4:2
12Posterior interosseous nerve localization within the proximal forearm-a patient normalized parameter显示文摘AIM To provide a 'patient-normalized' parameter in the proximal forearm. METHODS Sixty-three cadaveric upper extremities from thirty-five cadavers were studied. A muscle splitting approach was utilized to locate the posterior interosseous nerve(PIN) at the point where it emerges from beneath the supinator. The supinator was carefully incised to expose the midpoint length of the nerve as it passes into the forearm while preserving the associated fascial connections, thereby preserving the relationship of the nerve with the muscle. We measured the transepicondylar distance(TED), PIN distance in the forearm's neutral rotation position, pronation position, supination position, and the nerve width. Two individuals performed measurements using a digital caliper with inter-observer and intraobserver blinding. The results were analyzed with the Wilcoxon-Mann-Whitney test for paired samples. RESULTS In pronation, the PIN was within two confidence intervals of 1.0 TED in 95% of cases(range 0.7-1.3 TED); in neutral, within two confidence intervals of 0.84 TED in 95% of cases(range 0.5-1.1 TED); in supination,within two confidence intervals of 0.72 TED in 95% of cases(range 0.5-0.9 TED). The mean PIN distance from the lateral epicondyle was 100% of TED in a pronated forearm, 84% in neutral, and 72% in supination. Predictive accuracy was highest in supination; in all cases the majority of specimens(90.47%-95.23%) are within 2 cm of the forearm position-specific percentage of TED. When comparing right to left sides for TEDs with the signed Wilcoxon-Mann-Whitney test for paired samples as well as a significance test(with normal distribution), the P-value was 0.0357(significance-0.05) indicating a significant difference between the two sides.CONCLUSION This 'patient normalized' parameter localizes the PIN crossing a line drawn between the lateral epicondyle and the radial styloid. Accurate PIN localization will aid in diagnosis, injections, and surgical approaches.Srinath Kamineni Crystal R Norgren Evan M Davidson Ellora P Kamineni Andrew S Deane 2017World Journal of Orthopedics2017,8,4:2
13A systematic review and meta-analysis of dietary fat effects on reproductive performance of sows and growth performance of piglets显示文摘Effects of added fat in sow diets on the sows’reproductive performance and offspring growth performance are influenced by multiple factors such as genetics,nutrition,parity,ambient temperatures,and farm management.Individual studies cannot cover all these factors.With the view to address this challenge,we searched all studies that were published from 1986 to 2020,and performed a systematic review and meta-analysis on the fat effect.In total,19 papers were collected and analyzed.Fat supplementation in sow diets during late gestation and lactation decreased average daily feed intake(ADFI,P<0.05)and tended to increase average daily energy intake(ADEI,P=0.11).It had no impact on litter weights at birth(P=0.40)or weaning(P=0.46).It increased total numbers of piglets at birth(P=0.07),but had no effect on liveborn per litter(P=0.90)or survival rate(P=0.48)of piglets to weaning.Fat supplementation had no significant effect on sow body weight loss(P=0.67)or backfat thickness changes(P=0.66),but sows fed diets with added fat had increased milk fat concentration(P=0.03)and shorter wean to estrus intervals(WEI,P=0.01).In specific circumstances,fat supplementation tended to improve growth performance of piglets with low litter weights at birth(P=0.14),or when the sows lost large amounts of body weight during lactation(P=0.11).The level of supplemented fat was 10%and higher would decrease liveborn per litter at neutral temperature(P=0.10).The meta-analysis revealed that fat supplementation to sows diet during late gestation and lactation can be beneficial for sow reproductive performance and litter growth performance.Lixue Wang Shuai Zhang Lee J.Johnston Crystal L.Levesque Jingdong Yin Bing Dong 2022Journal of Animal Science and Biotechnology2022,13,3:2
14Multi-carbazole derivatives for two-photon absorption data storage:Synthesis,optical properties and theoretical calculation显示文摘Two novel quadrupolar organic compounds, 3-(4-((E)-2-(9-butyl-9H-carbazol-6-yl) vinyl)styryl)-9-propyl-9H-carbazole (BCSPC) and 3-(3-(3-((1E)-2-(4-((E)-2-(3-(3,5-bis(9-butyl-9H-carbazol-6-yl)phenyl)-9-butyl-9H-carbazol-6-yl)vinyl)phenyl) vinyl)-9-butyl-9H-carbazol-6-yl)-5-(9-butyl-9H-carbazol-6-yl)phenyl)-9-butyl-9H-carbazole (BCPBC), with different conjugated arms, have been designed and synthesized. Their one-and two-photon absorption (TPA) and excited fluorescence properties have been experimentally investigated. The two-photon absorption cross-sections of two compounds were estimated by two-photon excited fluorescence technique using 200 fs, 76 MHz, Ti:sapphire laser, which are 22 and 154 GM for BCSPC and BCPBC, respectively. The optimal excitation wavelengths are 780 nm for both BCSPC and BCPBC. A data recording experiment proved the potential application of the materials.LI Lin1, YANG JiaXiang1,2, WANG CaiXia1, HU ZhangJun1, TIAN YuPeng1,2, LI Jing3, WANG ChuanKui3, LI Ming4, CHENG GuangHua4, TANG HuoHong5, HUANG WenHao5, TAO XuTang2 & JIANG MinHua2 1Department of Chemistry, Anhui University, Hefei 230039, China 2State Key Laboratory of Crystal Materials, Institute of Crystal Materials of Shandong University, Jinan 250100, China 3Department of Physics, Shandong Normal University, Jinan 250014, China 4State Key Laboratory of Transient Optics and Photonics, Xi’an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi’an 710119, China 5Department of Precision Machinery and Precision Instrumentation, University of Science and Technology of China, Hefei 230026, China 2010Science China Chemistry2010,53,4:2
15Λ-Shaped optoelectronic materials based on Trger's base显示文摘Trger's base (TB) is a well-known chiral molecule with rigid concave shape that makes it applicable in different areas such as superamolecular chemistry,molecular recognition,biological labeling,and so on.In this article,we briefly summarize some recent research progress in the optoelectronic properties of novel TB analogues and their applications in optoelectronic field with emphasis on the developments achieved in our group.YUAN ChunXue,XIN Qian,LIU HuiJun,WANG Lei,JIANG MinHua & TAO XuTang State Key Laboratory of Crystal Materials Shandong University,Jinan 250100,China 2011Science China Chemistry2011,54,4:2
16Growth, structure and upconversion mechanisms of Ba_2ErCl_7 crystal显示文摘The methods to grow a novel upconversion crystal Ba2ErCI7 are reported in this note. Ba2ErCI7 material was synthesized with Er2O3, BaCI2-2H2O and NH4CI by using a so-called 'direct synthesis method'. High quality Ba2ErCI7 single crystals with size up to 4 mm×8 mm×15 mm were grown by using the Czochralski and the Bridgman methods. Intense yellow-green luminescence was detected when the crystal was pumped by an 803 laser diode (LD). Transmittance spectrum was measured by using HITACH U-3500 spectrophotometer at room temperature for the first time, in which one can see that the transmittance is high in the range from 350 to 1 600 nm and the cut-off wavelength of the crystal was 230 nm. The upconversion mechanisms were discussed.HAN Jianru, ZHOU Guangyong, ZHANG Shujun, CHENG Zhenxiang & CHEN HuanchuState Key Laboratory of Crystal Materials, Institute of Crystal Materials of Shandong University, Jinan 250100, China 2000Chinese Science Bulletin2000,45,11:2
17Tumor Necrosis Factor-α-Converting Enzyme (ADAM17) Mediates GPIbα Shedding From Platelets In Vitro and In Vivo显示文摘Wolfgang Bergmeier Crystal L. Piffath Guiying Cheng Vandana S. Dole Yuhua Zhang Ulrich H. von Andrian Denisa D. Wagner 2004Circulation Research2004,,7:2
182004年加拿大预防血透病人医院血流感染的成本-效益分析显示文摘目的:血液透析相关的血流感染是一个严重的公共健康问题,因为加拿大的血液透析病人从1996年到2005翻了一番。本研究目的在于确定加拿大医院血流感染的成本,估算在综合性医院中建立感染控制项目的成本,并进行成本-效益分析。材料与方法:用加拿大医院感染监测项目的数据来估算医院血流感染的发生率。用加拿大健康信息所数据来估算2004年加拿大平均一次血流感染住院的额外成本。建立和维护一个感染控制项目的成本用美国疾病预防与控制中心1985年的成本换算为2004年的加拿大成本来估算。假设感染控制项目能降低医院血流感染病例的20%~30%。结果:2004年的加拿大15278名血液透析病人中估计共有2524人发生血流感染。全年用于治疗血流感染的成本估计为4901万加元。医院血流感染预防和人力资源的总投资成本为815万加元。建立医院感染控制项目后能带来1452万加元的医疗成本节约。效益成本比在1.0:1到1.8:1之间。结论:本研究提供的证据表明,如果医院感染控制项目能降低20%~30%的感染,该项目的经济效益将远超过增加的成本。医院感染控制项目将带来双重效益:节约货币成本的同时改善医疗质量。Zhiyong Hong MD DrPH Jun Wu PhD Crystal O'Leary BHSc Clem Tisdell James Gomes Shi-Wu Wen Howard Njoo 李洪超 2010中国药物经济学2010,,1:2
19Immune checkpoint molecules in natural killer cells as potential targets for cancer immunotherapy显示文摘Recent studies have demonstrated the potential of natural killer(NK)cells in immunotherapy to treat multiple types of cancer.NK cells are innate lymphoid cells that play essential roles in tumor surveillance and control that efficiently kill the tumor and do not require the major histocompatibility complex.The discovery of the NK’s potential as a promising therapeutic target for cancer is a relief to oncologists as they face the challenge of increased chemo-resistant cancers.NK cells show great potential against solid and hematologic tumors and have progressively shown promise as a therapeutic target for cancer immunotherapy.The effector role of these cells is reliant on the balance of inhibitory and activating signals.Understanding the role of various immune checkpoint molecules in the exhaustion and impairment of NK cells when their inhibitory receptors are excessively expressed is particularly important in cancer immunotherapy studies and clinical implementation.Emerging immune checkpoint receptors and molecules have been found to mediate NK cell dysfunction in the tumor microenvironment;this has brought up the need to explore further additional NK cell-related immune checkpoints that may be exploited to enhance the immune response to refractory cancers.Accordingly,this review will focus on the recent findings concerning the roles of immune checkpoint molecules and receptors in the regulation of NK cell function,as well as their potential application in tumor immunotherapy.Yuqing Cao Xiaoyu Wang Tianqiang Jin Yu Tian Chaoliu Dai Crystal Widarma Rui Song Feng Xu 2020Signal Transduction and Targeted Therapy2020,5,1:2
20Optimal injection points for the neuromuscular blockade of forearm flexor muscles:a cadaveric study 显示文摘Roberts C Crystal R Eastwood D M 2006J Pediatr Orthop B2006,15,5:1
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