适用于生物医学信号功率谱分析的计算机实用程序

This paper presents a useful program for the power spectra analysis of biomedical signals on a microcomputer. The frequency spectra to show the allocation of frequency were calculated from the acquired biomedical signal via a window algorithm and the real signal special handling. The frequency spectra became normalized power spectra through algorithm and could be displayed on a monitor or printer in the mode of histogram. We have got good results using this program to compute the power spectra of phrenic nerve discharges from the rabbit.     

接触性皮炎斑贴试验标准系列抗原的对比研究

目的：比较自制抗原（简称自抗）与欧洲标准系列抗原（简称欧抗）质量并评估欧洲标准系列抗原在我国临床应用的可行性。方法：按照国际接触性皮炎研究组ＩＣＤＲＧ（Ｉｎｔｅｒｎａｔｉｏｎａｌ Ｃｏｎｔａｃｔ Ｄｅｒｍａｔｉｔｉｓ Ｒｅｓｅａｒｃｈ Ｇｒｏｕｐ）提供的抗原标准,用国产试剂配制抗原。通过实验室检测、动物试验和临床应用来评价抗原质量。通过对接触性皮炎病人的检测,观察阳性率的的高低以评估在临床应用的可     

HY沸石表面酸性的红外和紫外光谱研究

HY型沸石经过400℃真空煅烧,150℃吸附吡啶,分别在150℃、200℃、250℃、300℃、350℃真空脱附,先由红外光谱测得吸附在Lewis酸(简称L酸)和Bronsted酸(简称B酸)中心的吡啶吸收峰消光度(频率分别为1453cm~(-1)和1543cm~(-1)),然后,由紫外光谱测定其吡啶含量。求得两个红外吸收峰的消光系数为:ε~L=0.095±0.005cm~2/μmol,εB=0.065±0.004cm~2/μmol,计算了两种酸的酸量。测定了HY沸石和超稳Y沸石表面酸的酸强度分布。HY沸石的总酸量比超稳Y高,超稳Y酸强度比HY强。稳定化过程使总酸量减小,酸强度增加。在HY沸石中,L酸酸量随煅烧温度升高而升高,B酸酸量在300℃左右煅烧时达到最大,总酸量在300—350℃煅烧时出现最大。这与HY沸石催化苯的烷基化反应转化率比较,催化活性和总酸量存在密切联系。     

儿童期的骨生长代谢研究

OBJECTIVE: To explore the regularity of bone development and metabolism in childhood. METHODS: A survey was made to collect and analyze the data on bone biochemistry, the density of lumbar vertebrae and the X-ray examination of calcaneus in 224 healthy children aged 3-15 years in the urban area of Chengdu. RESULTS: Comparative analysis of serum and urine calcium and phosphate concentrations showed no significant difference between the age groups. The serum alkaline phosphatase (ALP) and bone alkaline phosphatase (BALP) were found to increase with age and reach their peak values in children aged 7-12 years, and their values were significantly higher than that of adults (P < 0.05). The density of lumbar vertebrae and the trabecular bone of calcanesus also developed with age. CONCLUSION: The measurements of the bone biochemistry, bone density and the trabecular bone of calcaneus which reflect the bone development and metabolism have their special regularity in childhood. The criteria in use for adulthood is not fit for the evaluation in childhood. The data obtained can be used in clinical diagnosis and treatment of the bone metabolic diseases of children.     

肝脏同工铁蛋白性质的研究

The characters of liver isoferritin from Wistar rat, normal human and patient with hepatocellular carcinoma (HCC) were studied. The ratio of iron to protein of liver isoferritin from patient with HCC were 0.021, which accounts for about one-twelfth of that of liver isoferritin from normal human. The molecular weights of liver isoferritin from normal human and the patient with HCC were 20.5 kd and 21.5 kd, respectively. The electrophoresis patterns of liver isoferritin from both Wistar rat and patient with HCC showed one band, but two bands from normal human. There was cross reaction in immunity among isoferritins from normal human liver, Wistar rat liver and horse spleen by double immunodiffusion. The PAGE patterns of liver isoferritin from different sources could be clearly differentiated. The data presented may serve as a good reference for further study of the relationship between the structure and function of ferritin and may be used practically in clinical medicine.     

1,3-二氢苯并[b][1,4]二氮杂卓-2-酮类非竞争性mGluR2/3拮抗剂的三维定量构效关系

目的本研究采用比较分子力场分析法（comparative molecular field analysis,CoMFA）和比较分子相似性指数分析法（comparative molecular similarity indices analysis,CoMSIA）,系统研究了30个1,3-二氢苯并[b][1,4]二氮杂卓-2-酮类非竞争性代谢型谷氨酸受体2/3（mGluR2/3）拮抗剂的三维定量构效关系。方法通过考察网格点步长对CoMFA研究统计结果和各种分子场组合、网格点步长和衰减因子对CoMSIA研究统计结果的影响,建立了3D-QSAR模型,发现立体场、静电场、疏水场和氢键受体场的组合可得到最佳模型。结果所建立的CoMFA和CoMSIA模型的交叉相关系数q2值分别为0.729和0.713,均具有较强的预测能力。结论利用CoMFA和CoMSIA模型的三维等值线图直观地解释了化合物的构效关系,阐明了化合物结构与生物活性的关系,为进一步结构设计和优化提供了重要依据。     

68例血管母细胞瘤的组织病理及免疫组化研究

为了解血管母细胞瘤的病理形态变化特点及其间质细胞的组织来源,对６８例血管母细胞瘤进行了组织形态学观察,并对３３例进行了免疫组化染色。５２例（７６．６％）病程在２月至１年之间,６０例（８８２％）发生于小脑,５０例（７３．５％）呈囊性包块,从组织形态上可将该瘤分为三型：经典型３０例,富于细胞型２１例,网状型１７例、３３例血管母细胞瘤的间质细胞均对神经特异性烯醇酶（ＮＳＥ）阳性,而对八因子（Ｆ－Ⅷ）、荆     

^125I—血管活性肠肽在正常动物体内药动学的研究

为探讨放射性碘标记血管活性肠肽在正常大鼠体内的药物动力学，经大鼠尾静脉注射＾１２５Ｉ－ＶＩＰ后０．５－２４０分钟，连续采集血液测定某放射性。结果显示〈＾１２５Ｉ－ＶＩＰ在大鼠丛内的转运符合三室开放模式的动力学方程，＾１２５Ｉ－ＶＩＰ在血液中平均分布半衰期为１．３６分钟，体内消除半衰期Ｔ１／２β为６７．３分钟；Ｋ１２明显高天Ｋ２１，而Ｋ２１：Ｋ１２明显低于Ｋ３１：Ｋ１３。     

妇炎克颗粒剂质量标准的研究

为制订妇炎克颗粒剂的质量标准,本文采用薄层色谱法对制剂中的黄柏、虎杖及甘草进行定性鉴别;并用薄层扫描法对制剂中盐酸小檗碱进行定量分析,结果表明盐酸小檗碱在０．４５７～３．２μｇ的浓度范围内具有良好的线性关系（ｒ＝０．９９９）,加样回收率为９７．８６％,相对标准偏差ＲＳＤ为１．９６％。定性、定量方法简便、可靠、重现性好,具有实用性。     

一个以参数设置为特色的HIS应用软件

本文着重论述了以参数设置的医院管理信息系统,利用参数设置技术方法可大大方便用户的使用并提高工作效率,提高了软件的可维护性,在商品化的软件中用户不会处于被动地位,有一定的灵活空间.     

液晶冠醚固定相分离正构脂肪醇和脂肪酸乙酯同系物的气相色谱研究

目的建立正构脂肪醇和脂肪酸乙酯同系物的分离方案。方法气相色谱分析法。结果 4′ 胆甾烯氧羰基苯并 15 冠 5(CH B 15 C 5 )在不同温度范围内其相态不同 ,在同一温度范围内因处理方式不同而物性亦相去甚远 ,用其作成的固定相兼具气固色谱 (GSC)、普通气液色谱 (GLC)和冠醚液晶气液色谱 (CL GLC)多种性能。结论用该固定相可对正构脂肪醇同系物及正构脂肪酸乙酯同系物进行有效分离 ,排列有序的液晶冠醚固定相可提高气相色谱分离度     

纺织噪声对女性生殖机能与胚胎发育的影响

Ninety hundred seventy-eight female textile workers exposed to noise (greater than or equal to 85 dB (A)) were recruited as the subjects of observation group, and 402 nonexposed female workers were chosen as the controls (less than 75 dB (A)). According to noise level, the observation group was subdivided into three groups: group 1, 100-104 dB (A), 416 workers; group 2, 95-99 dB, (A), 310 workers; group 3, 85-94 dB (A), 252 workers. Non-conditional logistic regression model was used to exclude the effect of mixed factors, such as age and working life. The result showed that noise-exposure could have some adverse effect on reproductive function of women and embryo growth. The workers exposed to noise had significantly increased incidence rates for irregular menstrual cycle, dysmenorrhea, lumbago, hypertension in pregnancy, threatened abortion, spontaneous abortion, premature labour, dystocia and low birth weight of newborns. When the noise intensity heightened, the sorts of abnormal function of reproduction increased and the risk of incidence raised too. These demonstrated a dose-response relationship between the noise intensity and incidence rate. The noise-working life had significant effects on the incidence of hypertension in pregnancy and prematurity. Although the age had some influence, it was not statistically significant. In terms of the maternal function and embryo growth, the factors in order of risk are: noise intensity greater than working life greater than age.     

颅内动脉瘤患者血清差异蛋白质谱表达模型的研究

目的通过检测颅内动脉瘤患者血清特异蛋白标记物,为筛选颅内动脉瘤,尤其是未破裂颅内动脉瘤患者提供实验依据。方法将本院神经外科收治的颅内动脉瘤破裂、未破裂患者分别作为破裂组(n=45)及未破裂组(n=45),同时期健康体检者作为对照组(n=45)。采用表面增强激光解吸/离子化飞行时间质谱(SELDI-TOF-MS)技术、金属亲和蛋白芯片及分析软件分别对未破裂组、破裂组及对照组血清样品进行检测,筛选差异蛋白,建立诊断模型并进行双盲法验证。结果未破裂组与正常组血清有54个蛋白质峰表达的差异具有统计学意义(P<0.05),其中8个蛋白质峰荷质比分布于2 000～20 000之间,两组比较差异显著(P<0.01);未破裂组与破裂组血清有79个蛋白质峰表达的差异具有统计学意义(P<0.05),其中14个蛋白质峰荷质比分布于2 000～20 000之间,两组比较差异显著(P<0.01)。以荷质比为2 540.6、3 367.7、5 857.5及8 231.0的4个差异蛋白建立神经网络筛选模型可鉴别未破裂动脉瘤患者与正常人血清样本,经双盲法测试,其灵敏度为93.3%,特异度为93.3%,受试者工作特征(ROC)曲线下面积(AUC)为0.920,验证所建立的诊断模型可靠;筛选荷质比为2 938.2、4 065.3、6 642.0、9 127.5及16 021.6的5个差异蛋白建立神经网络筛选模型可鉴别未破裂动脉瘤与破裂动脉瘤血清样本。经双盲法测试,其灵敏度为93.3%,特异度为86.7%,AUC为0.858,验证所建立的诊断模型可靠。结论建立血清差异蛋白质谱表达模型是筛选未破裂颅内动脉瘤的一种新方法。     

大肠杆菌HX88108膜孔蛋白初步研究

为了解大肠杆菌ＨＸ８８１０８耐药机理中有无膜孔蛋白缺失骑车,用十二烷基磺酸钠－聚丙烯酰胺凝胶电泳检测了大肠杆菌ＨＸ８８１０８的膜蛋白,并与膜孔蛋白标准株进行比较分析。     

全硅橡胶和乳胶导尿管留置导尿的临床比较

目的探讨不同材料导尿管留置导尿对尿道黏膜的影响，以其指导临床合理选择导尿管。方法将需要留置导尿病人随机分为全硅橡胶及硅化乳胶导尿管两组，每组各为30例，分别检测尿常规、记录留置导尿管期间病人的感觉。结果插管初期硅橡胶导尿管比乳胶导尿管镜下血尿发生率低，插管期间硅橡胶导尿管组病人不适感觉少见。结论插管过程中内固定囊压迫膀胱黏膜或者病人活动牵拉导管可能是造成尿道或膀胱损伤的原因之一。全硅橡胶导尿管相对于乳胶导尿管对尿道黏膜损伤轻，建议对需要长期留置导尿管的病人尽量使用对尿道刺激和损伤小的全硅橡胶导尿管。     

生物型人工硬脑膜应用的实验研究

OBJECTIVE: To evaluate the safety and efficacy of a dural graft prepared using porcine membrane in duraplasty. METHODS: Eighteen New Zealand rabbits were randomly divided into groups A (n=4), B (n=4), C (n=5), and D (n=5) sacrificed 3, 14, 30 and 90 d after duraplasty, respectively. Each animal underwent bilateral parietal craniectomy behind the coronal suture and beside the midline to expose the dura, which was cut on the right side and substituted with the dural graft. The exposed dura on the left was kept intact as control. The rabbits were observed for WBC counts before the operation and before sacrifice by transcardiac formalin perfusion, respectively. The meninges and brain tissues were histologically examined after sacrifice. RESULTS: The WBC count varied little after the operation (P>0.05). Microscopic examination demonstrated tissue repair on both the implantation side and control side, without graft adhesion to the cortical surface. In group A, a large number of leukocytes were seen gathering on the lateral dura, suggesting acute tissue repair. In group B, endothelial cells covering the inner surface of the graft could be seen. Fibroblasts and fibrocytes were seen in the grafts between collagen fibers in group C, and in group D, fibroblasts and fibrocytes increased between the collagen fibers and the suture healed. CONCLUSION: The dura graft is safe and applicable for dural defect repair.