尼龙1010／6及尼龙1010／66动态力学分析

通过动态力学参数温度谱,研究了尼龙１０１０／６、尼龙１０１０／６６两个共聚物系列的动态力学参数与组成的关系。研究表明尼龙１０１０／６、尼龙１０１０／６６在测试温度范围内出现三个明显的松驰转变：α、β、γ,其中各共聚物的β、γ松驰温度相差不大,而α松驰温度随组成改变有明显改变。一般均聚物的α松驰温度较高,共聚物的α松驰温度均低于均聚物,二个系列以尼龙１０１０／６（２９．８／７０．２）、尼龙１０１０／     

Nonoperative treatment of Dupuytren's disease

Many nonoperative therapies have been investigated for the treatment of Dupuytren's disease. These include needle fasciotomy, continuous slow skeletal traction, radiation, dimethyl sulfoxide, vitamin E, allopurinol, physical therapy, ultrasound therapy, steroid injections, radiation, interferon, splinting, and enzymatic fasciotomy. Most of these therapies have not proven to be clinically useful. However, recent investigation of enzymatic fasciotomy using collagenase injection has shown encouraging results.     

环孢霉素A滴眼预防高危角膜移植免疫排斥的效果

目标 探讨环孢霉素Ａ（ＣｓＡ）联合地塞米松局部滴眼预防高危穿透角膜移植（ＰＫＰ）免疫排斥反应的效果。方法 将７７眼高危ＰＫＰ分为ＣｓＡ组（３７眼）;２％ＣｓＡ蓖麻油溶液联合地塞米松滴眼;对照组（４０眼）单独使用地塞米松滴眼。采用生存曲线进行比较。结果 术后２年,两组植片存活率分别为８９％和６０％,差异有显著性（Ｐ〈０．０５）。结论 ２％ＣｓＡ蓖麻油溶液联合地塞米松溶液局部滴眼是预防高危ＰＫＰ免疫排     

Superovulation with or without intrauterine insemination for the treatment of infertility.

Patients undergoing human menopausal gonadotropin (hMG) superovulation were reviewed retrospectively to determine whether fecundity was greater for intrauterine insemination (IUI) than timed intercourse. Forty patients with unexplained infertility, American Fertility Society I or II endometriosis, luteal phase defect and/or cervical factor were treated with hMG alone or hMG plus IUI. Twenty-eight underwent 52 cycles of hMG/IUI, and 19 underwent 31 cycles of hMG. The probability of pregnancy after four cycles was significantly better in the hMG/IUI group (.90) than the hMG group (.37, P = .049). There was a 54.5% multiple pregnancy rate, and one patient was admitted to the hospital for hyperstimulation. When traditional therapy fails, hMG/IUI significantly increases the pregnancy rates as compared to hMG with timed intercourse in a "good prognosis" group of patients.     

Quantitative fluorescence image analysis of deoxyribonucleic acid ploidy in urine from normal children

Quantitative fluorescence image analysis incorporates the 2 diagnostic techniques of cytological analysis with quantitation of deoxyribonucleic acid (DNA). Exfoliated urinary cells are ideal for analysis by this method, which allows the identification of "rare event" abnormal cells. We evaluated the urine from 50 children who had undergone cystoscopy or were catheterized for other reasons. The urine was free of infection by urinalysis. Cytological analysis demonstrated normal or atypical cells in all patients. Of the patients 1 (2%) had greater than 2 of 500 cells analyzed with greater than 5C DNA and 4 (8%) had greater than 2 of 500 cells with greater than 5C double stranded nucleic acid. These data suggest that it may be "normal" for urine to contain "rare event" abnormal cells. The significance of this finding is unclear at present.     

高频电波刀行电圈切除治疗宫颈病变的临床应用探讨

目的　评价高频电波刀行电圈切除 (LEEP)治疗宫颈病变中的临床应用价值。方法　回顾性分析我院 2 71例LEEP治疗宫颈病变的临床资料 ,所有病例均行阴道镜下多点活检和LEEP术后病理诊断 ,在炎症和赘生物病变外缘 3mm进出电极 ,对于CINI与HPV感染患者 ,电极在病变边缘外 5mm进出。结果　阴道镜下多点活检与LEEP术标本的病理诊断差别有显著性 (P <0 0 5 )。 2 71例患者术后随访 2 4 3例 ,术后复查宫颈细胞学 ,仅 9 0 5 %出现细胞核肥大和核异质。结论　LEEP对包括炎症、损伤、癌前病变、HPV感染等宫颈病变是一种非常理想的诊断、治疗手段。宫颈细胞学检查、阴道镜下多点活检、LEEP术后病理诊断构成了宫颈病变系统的诊断模式。LEEP可以广泛地应用于治疗CIN各级病变 (原位癌除外 ) ,LEEP也适用于CINI的治疗 ,LEEP治疗的范围可以在病变边缘外 5mm处进出电极     

HBV-YMDD变异患者与中医虚实辨证关系初探

目的 :初步探讨服用拉米夫定后HBV -YMDD变异患者中医辨证虚证、实证之间的关系。方法 :对服用拉米夫定半年以上的乙型慢性病毒性肝炎患者采用联合基因集团上海博华基因技术有限公司出品的迈科锐乙型肝炎病毒突变检测基因芯片 ,进行HBV -YMDD变异检测。出现HBV -YMDD者 ,根据中医基础理论 ,将其分为实证、虚证 ,来探讨HBV -YMDD变异患者中医虚、实辨证的关系。结果 :HBV -YMDD变异患者中实证变异率(38/ 4 8)明显高于虚证 (10 / 4 8) ,具有统计学意义。结论 :HBV -YMDD变异与虚、实辨证之间具有相关性。     

pH-敏感甲硝唑壳聚糖-聚乙烯吡咯烷酮水凝胶的研究

 目的 制备pH-敏感的壳聚糖-聚乙烯吡咯烷酮（PVP）水凝胶，作为甲硝唑治疗胃溃疡控释给药系统的载体。方法 用戊二醛交联适宜比例混合的壳聚糖、PVP混合物，负载甲硝唑或不负载甲硝唑，制备载药水凝胶及空白水凝胶，再冷冻干燥形成半渗透聚合网状物Semi-IPN。用扫描电镜观察性状结构，用测角仪测定其辛烷接触角，用电子天平测其在不同pH介质中的膨胀率，用红外测定了其特征峰，同时考察了载药水凝胶体外释药特性，初步药理实验判断其对实验性胃溃疡的疗效。结果 水凝胶具多孔性，且可很好地负载甲硝唑。辛烷接触角为(143.8±1.02)°，显示本品有较大的亲水性。膨胀率随pH的降低而增大，红外图谱说明水凝胶在酸性介质中膨胀时有-NH₂质子化。甲硝唑在酸性介质中的释放也随pH降低而增大，在pH 1.0介质中，3 h达最大释放量87%。初步药理实验表明，与对照组及甲硝唑片治疗组相比，该甲硝唑水凝胶对胃溃疡具有较优的治疗作用（P分别<0.01及P<0.05）。结论 甲硝唑水凝胶具有pH-敏感膨胀性，可改善甲硝唑对实验性胃溃疡的治疗作用，可作为治疗胃溃疡的新型胃部控释系统研究开发。     

肿瘤坏死因子-β抗肿瘤及作用机制的研究

目的 :探讨肿瘤坏死因子 -β(tu mornecrosisfactor β ,TNF β)对 3种人癌细胞的增殖抑制作用及其细胞分子机制。方法 :采用多种体外及体内实验方法 ,从多侧面证实TNF β的抗肿瘤作用。并采用细胞内游离钙浓度测定、12 5I cAMP放免检测法检测cAMP含量。结果 :不同浓度TNF β对肿瘤细胞系均有增殖抑制作用 ,且呈剂量依赖性。当TNF β与顺铂和多柔比星合用 ,JF3 0 5细胞死亡百分比分别达到 ( 68 6±9 0 ) %和 ( 76 5± 7 9) %。TNF β实验组细胞内cAMP浓度明显增加 ,JF3 0 5细胞由( 0 0 5 72± 0 0 176)上升到 ( 0 2 896±0 0 784) pmol/10 6个细胞。此外细胞内钙浓度上升并且凋亡。结论 :TNF β具有体内、外抗肿瘤作用 ,其部分机制是通过增加cAMP含量及诱导细胞凋亡