A new tablet for writing and drawing during functional MRI

Writing and drawing are understudied with fMRI, partly for lack of a device that approximates these behaviors well while supporting task feedback and quantitative behavioral logging in the confines of the magnet. Consequently, we developed a tablet based on touchscreen technology that is accurate, reliable, relatively inexpensive, and fMRI compatible. After confirming fMRI compatibility, we conducted preliminary fMRI experiments examining the neural correlates of a widely used pen‐and‐paper neuropsychological assessment, the trail making test. In two subjects, we found left hemisphere frontal lobe activations similar to the major results of a previous group study, and we also noted individual differences mostly in the right hemisphere. These results demonstrate the utility of the new tablet for adaptations of pen‐and‐paper tests and suggest possible uses of the tablet for longitudinal, within‐subjects studies of disease or therapy. We also discuss using the tablet for several other types of tests requiring many, continuous, or two‐dimensional responses that were previously very difficult to perform during fMRI. Hum Brain Mapp, 2011. © 2010 Wiley‐Liss, Inc.     

升麻解毒药对在方剂中的作用

文章就升麻的解毒功效及其药对组合在方剂配伍中的作用,结合本草文献、实验研究和临床经验进行了论述。总结出升麻的解毒作用主要有解时疫疠毒、解疮疡斑疹肿毒、解虫毒和解药毒4个方面。并分别阐述了升麻配玄参、配生地黄、配大青、配黄连、配石膏、配虎杖、配鳖甲、配金银花和连翘、配甘草、配牛蒡子、配马蔺子、配射干、配牛蒡子和桔梗、配葛根、配黄芩、配黄柏、配芍药的意义。     

钛合金过敏反应致Cage移位1例报道

目的报告1例钛合金过敏反应致Cage移位的患者。方法报告1例行“经后路减压、钉棒系统内固定、脊柱椎间融合器（cage）植入植骨术”的高敏体质患者。结果钉棒系统内固定术后，Cage向后移位。结论钛合金生物相容性较好，但仍然有导致过敏反应的可能，引起内固定物松动或脱落。     

RGD多肽化学修饰聚苯乙烯培养板的细胞相容性研究

目的 考察RGD多肽化学修饰聚苯乙烯培养板细胞相容性研究.方法 采用高锰酸钾硫酸溶液对聚苯乙烯表面进行氧化反应,生成羧基位点；水溶性碳二亚胺活化羧基,接枝明胶、胶原和RGD多肽.用红外光谱、X-射线光电子能谱(XPS)、动态接触角等研究了RGD化学修饰聚苯乙烯的变化,并考察了RGD化学修饰聚苯乙烯后细胞相容性的变化.结果 XPS结果证实了聚苯乙烯表面N原子的引入,RGD是共价键合在聚苯乙烯表面的.动态接触角下降显著,证明修饰表面的亲水性能提高.在修饰后的聚苯乙烯培养板种植入表皮细胞,结果显示提高了细胞的黏附和增殖能力.结论 聚苯乙烯表面进行RGD化学修饰,有利于提高细胞在其表面的黏附和增殖能力,有望为免疫磁珠分离得到的高纯度内皮祖细胞提供良好的培养介质.     

Effect of reduced protein adsorption on platelet adhesion at the phospholipid polymer surfaces

We prepared polymers having a phospholipid polar group, poly[ω-methacryloyloxyalkyl phosphorylcholine (MAPC)-co-n-butyl methacrylate(BMA)], as new biomedical materials and evaluated their blood compatibility with attention to protein adsorption and platelet adhesion. The total amount of proteins adsorbed on the polymer surface from human plasma was determined, and the distribution of adsorbed proteins on the plasma-contacting surface was analyzed. The amount of proteins adsorbed on every poly(MAPC-co-BMA) was small compared with that observed on polymers without the phospholipid polar group. However, there was no significant difference in the amount of adsorbed proteins on the poly(MAPC-co-BMA) even when the methylene chain length between the phospholipid polar group and the backbone in the MAPC moiety was altered. Platelet adhesion on the polymer surface from a platelet suspension in a buffered solution was evaluated with and without plasma treatment on the surface. When a rabbit platelet suspension was brought into contact with the poly(BMA) surface after treatment with plasma, many platelets adhered and aggregated. However, a reduced amount of platelet adhered on the poly(BMA) was found in the case of direct contact with the platelet suspension. On the other hand, the poly(MAPC-co-BMA)s could inhibit platelet adhesion under both conditions. Based on these results, it can be concluded that the proteins adsorbed on the surface play an important role in determining the platelet adhesion and suppression of the protein adsorption on the surface, which is one of the most significant ways of inhibiting platelet adhesion.     

半夏厚朴汤及其拆方改善慢性间歇性低氧小鼠机体铁代谢

目的 观察半夏厚朴汤（BHF）及其拆方对慢性间歇性低氧（CIH）小鼠机体铁代谢的调节作用。方法 42只雄性C57BL/6N小鼠随机分为常氧对照组（Con）、CIH模型组（CIH）、全方组（CIH+BHF）、苏叶组（CIH+苏叶）、厚朴组（CIH+厚朴）、行气组（CIH+厚朴、苏叶）、化痰饮组（CIH+半夏、茯苓、生姜）,每组6只。连续CIH暴露和灌胃给药处理21 d后检测相关指标。比色法检测血清铁,HE染色观察肝脏及十二指肠形态结构、Perls’染色观察肝脏、脾脏、十二指肠铁含量,Western Blot及免疫组织化学染色检测肝脏铁调素（hepcidin）、转铁蛋白受体1(transferrin receptor 1,TfR1)、铁泵蛋白1(ferroportin 1,FPN1)、铁蛋白轻链（ferritin light chain,FTL）蛋白表达。结果 与Con组比较,CIH组小鼠血清铁含量降低,小肠黏膜（十二指肠）与肝脏组织结构损伤,肝脏、小肠铁沉积增加（P<0.05）,脾脏铁含量减少（P<0.05）,肝脏TfR1、FTL、hepcidin蛋白表达升高（P<0....     

医院药品处方合理性评价体系构建及其分析研究

目的:通过对医院药品费用影响因素地分析,构建医院药品处方合理性的评价指标体系。方法:利用典型抽样与分层抽样相结合的方法,收集具有典型代表性病例;利用专家咨询的Delphi法,确立评价指标。结果:在对药品处方合理性影响因素分析时,筛选了5个一级指标和22个二级指标。结论:文章对药品处方的影响因素进行了筛选与量化,为改善药品处方合理性提供了重要的依据。     

柴胡桂枝干姜汤方证特点及配伍规律分析

目的 基于验案分析探讨柴胡桂枝干姜汤的方证特点与配伍规律.方法 检索瀚堂典藏中医药文献数据库和中国生物医学文献服务系统(SinoMed)中使用柴胡桂枝干姜汤的古今验案,用频次法计数文献中各验案的主要症状及用药情况,用因子分析和层次聚类分析其方证特点和用药配伍规律.结果 共纳入236篇文献,获得古代验案9个、现代文献验案...     

自制输血相容性检测室内质控品保存条件的研究

本研究目的是利用输血相容性检测实验室现有血液标本资源,建立自制室内质控品技术。随机选取24名A型RhD阳性的健康献血者,分别采集静脉血4ml,采用析因设计方法,根据使用抗凝剂种类、是否添加红细胞保存液以及标本每日室温存放时间,将24个标本随机平均分成8组,将所有盛装标本的试管盖帽后4℃保存,每天在室温放置1小时或2小时。分别在保存的0、7、14、21、28、35天测定所有标本的ABO、RhD血型（记录正反定型的凝集强度）、IgM抗B抗体效价和上清液中游离血红蛋白浓度并计算其增量值。结果表明：使用ACD-B抗凝剂并添加MAP红细胞保存液,每天室温放置1小时（A282C1）组标本的红细胞损伤最小,各时间点FHb浓度及其增量值均最低（P〈0．01）,35天时FHb浓度仅为（245．1±84,5）mg／L。保存过程中A抗原、D抗原及kM抗B抗体反应活性无明显变化（P〉0．05）。结论：在输血相容性检测实验室现有条件下,可以利用本研究建立的A282C1方案制备出性能相对稳定、可有效保存的能够满足室内质控要求的改良全血室内质控品。     

聚对苯二甲酸丁二醇酯无纺布接枝丙烯酸制备LDL吸附材料及其血液相容性初步研究

目的制备1种对低密度脂蛋白(LDL)、胆固醇和甘油三酯有选择性吸附的材料,并初步评价该系列材料的血液相容性。方法通过紫外辐照接枝的方式在聚对苯二甲酸丁二醇酯无纺布(PBTNF)上接枝不同比例的丙烯酸(AAc)(接枝率分别为17%、35%、45%、55%、60%),研究PBTNF-AAc对低密度脂蛋白、胆固醇、甘油三酯、高密度脂蛋白的吸附能力;用X射线光电子能谱分析改性PBTNF-AAc表面,并考察PBTNF-AAc的溶血率及血小板粘附性能。结果在体外实验中测得上述5接枝率的PBTNF-AAc对LDL的去除率分别为(50.8±3.2)%、(56.1±6.9)%、(66.5±6.9)%、(83.4±3.9)%和(85±2.9)%,以及血小板粘附的数量(×106/cm2)分别为92.0±25.7、29.5±5.6、20.5±3.6、14.9±1.5和12.9±1.8,且溶血率均<5%。结论所制备的PBTNF-AAc对LDL具有良好的吸附性能且血液相容性良好。