桃树砧木的研究进展

文章综述了国内外桃树砧木的应用和研究进展情况,重点在抗根结线虫、耐涝性、耐旱性、耐盐碱性、抗根癌病、抗重茬、抗寒性以及矮化砧木的研究进展方面进行了综述。     

万寿菊色素浸提方法及其性质的初步研究

采用不同浸提液对万寿菊花干粉中叶黄素提取率的影响进行了初步研究，发现以己烷：丙酮：甲醇复合试剂浸提花粉，叶黄素的提取率最高，达6．21mg/L。结果表明，万寿菊花粉提取液中叶黄素在皂化前后均对温度不敏感，而光却可明显使其成分降解。     

普通磨床安全设计中的危险分析和风险评价

应用安全系统工程的原理和方法，对普通磨床安全设计中的核心问题－－危险分析和风险评价进行了系统而深入的探讨，并在此基础上提出了普通磨床的安全设计方案，为机械产品的安全设计提供了一整套方法和思路。     

计算机辅助机械原理课程设计系统的开发

计算机辅助机械原理课程设计系统应用Visual Basic6．0语言，依托解析法的理论模型及公式，在计算机上实现了平面四杆机构、凸轮机构、齿轮机构、牛头刨床和压床等机构的参数化设计及其运动和力分析。     

水稻裂颖突变体sh1的鉴定及基因定位

【目的】本研究旨在定位和克隆水稻裂颖基因，为解析水稻裂颖性的遗传机制提供依据。【方法】从籼稻品种湘早籼6号突变体库中筛选出一个裂颖突变体(split husk 1, sh1)，观察突变体的花器官和浆片形态，利用突变体与02428的F2群体定位目标基因，进一步通过定量PCR分析相关基因的表达情况。【结果】sh1突变体的颖花形态与野生型基本一致，能正常开花，但不能正常闭颖，裂颖的主要原因是浆片不能在开颖后正常萎蔫。sh1突变体的有效穗数增加，但结实率和千粒重显著下降；遗传分析表明，sh1的裂颖表型受一对隐性核基因控制。将SH1基因定位在ID19827与ID19884两个InDel标记之间，物理距离约为110 kb。定位区间测序发现，突变体中丙二烯氧化合酶编码基因OsAOS1发生单碱基突变，导致氨基酸发生改变；SH1基因的突变显著降低了花器官中的茉莉酸含量，进而影响了茉莉酸合成及信号转导相关基因的表达。【结论】SH1基因通过影响茉莉酸的合成和信号转导调控水稻闭颖，OsAOS1可能是SH1基因的候选基因。     

波尔山羊引种与杂交利用

本文根据我国北亚热带和北温带引进的波尔山羊的生产性能表现，讨论了其引种适应性。综合各地利用波尔山羊杂交改良本地山羊的资料得知，波尔山羊改良地方山羊既提高了杂种后代的初生重，又加快了生长，还使屠宰率提高，尤其是在粗放条件下仍能表现出好的性能。通过分析，本文提出了适宜于平原农区的肉用山羊生产模式。     

猪繁殖与呼吸综合症血清抗体的检测报告

2001年从四川省6个市7个种猪场采集未经免疫猪繁殖与呼吸综合征（PRRS）疫苗的种猪血清样本598份，用乳胶凝集试验检测PRRS抗体，结果表明，平均阳性率为19．56％，最低的为0，最高者达63％，阳性场占6／7。     

Effects of probucol on the proliferation of rat vascular smooth muscle cells stimulated by basic fibroblast growth factor and hydrogen peroxide

AIM: To investigate the effect of probucol on proliferation of rat vascular smooth muscle cells(VSMC) stimulated by basic fibroblast growth factor (bFGF) and/or hydrogen peroxide(H₂O₂). METHODS: Effects of probucol on VSMC proliferation and DNA synthesis stimulated by bFGF and/or H₂O₂ were observed by means of MTT test, cell number count and [3H]-TdR incorporation. RESULTS: ①Probucol significantly inhibited proliferation and DNA synthesis in VSMC stimulated by bFGF and/or H₂O₂, with dosage-dependent manner. Cell number, A value and [3H]-TdR incorporation in group probucol+bFGF and group probucol+H₂O₂ were reduced by 40.0%, 39.1%, 45.5% and 46.9%, 45.0%, 39.5%, respectively, compared with group bFGF and group H₂O₂ (P＜0.05, P＜0.01, respectively). ②Pretreatment of VSMC with probucol for 24 h prior to bFGF and/or H₂O₂ stimulation exhibited significant inhibiton of VSMC proliferation and DNA synthesis, but after prestimulation by bFGF and/or H₂O₂ for 24 h, probucol had no influence on VSMC proliferation and DNA synthesis (P＞0.05). CONCLUSION: Probucol dramatically inhibited proliferation and DNA synthesis in VSMC stimulated by bFGF and/or H₂O₂, but had no inhibitory effect on the cell proliferation prestimulated by bFGF and /or H₂O₂.     

如何使“三个代表”进入学生头脑

通过对“三个代表”重要思想如何进学生头脑的探讨，在目标、原则、途径和方法几个方面提出自己的见解和所要达到的目标，以最终使学生能认可并践行“三个代表”重要思想。     

Prognostic significance of CUEDC2 expression in hepatocellular carcinoma

AIM: To investigate the expression of CUE domain-containing 2 (CUEDC2) in hepatocellular carcinoma (HCC) and to analyze its clinical prognostic significance. METHODS: Total 186 formalin-fixed paraffin-embedded tissues obtained from surgical HCC with detailed clinicopathological and follow-up data were used. The expression of CUEDC2 was detected by immunohistochemistry. The relationships between the expression of CUEDC2 and clinicopathological characteristics and prognosis were analyzed. RESULTS: The positive rate of CUEDC2 in HCC was 85.5% (159/186), among which, the low expression was 52.2% (97/186) and the high expression was 47.8% (89/186). CUEDC2 expression was correlated with serum alpha-fetal protein (AFP) level, tumor size, tumor number, tumor differentiation and TNM stage (P<0.05). Kaplan-Meier survival curves showed that the patients with high expression of CUEDC2 were associated with significantly shorter overall survival and recurrence-free survival than those with low CUEDC2 expression (P<0.05). Multivariate Cox regression analysis revealed 3 independent prognostic factors including CUEDC2 expression, serum AFP and tumor number. CONCLUSION: CUEDC2 was expressed in most HCC tissues, which was relevant to tumor growth, tumor differentiation and prognosis. CUEDC2 could be a novel valuable molecular marker to predict the HCC prognosis.