水稻新品种镇稻10号的丰产稳产性及其利用

[目的]为水稻生产中合理利用镇稻10号提供依据。[方法]以2004~2005年度江苏省水稻新品种区域试验和生产试验结果为分析资料,采用高稳系数法,结合产量变异系数和适应度,对镇稻10号和对照武运粳7号进行比较。[结果]在2004~2005年区域试验、2005~2006年区域试验和生产试验中,镇稻10号的平均产量分别为9 008.258、655.008、319.15 kg/hm2,分别比对照增产3.27%、3.59%、5.37%;高稳系数分别为90.56%、86.33%和70.41%,均大于对照;产量变异系数分别为3.53%、8.33%、26.50%,均小于对照;适应度分别为57.14%、71.43%、75.00%,均大于对照。[结论]镇稻10号是一个高产稳产、丰产性好的晚粳稻新品种,具有较好的广适性,增产潜力大,适宜在沿江和苏南等中高产地种植。     

砼电杆蒸养工艺过程的温控技术改进及应用

介绍了一套砼电杆制造过程中蒸养温度的自动控制系统，此控制系统利用企业现有的库存设备，对原蒸养工艺过程的温控方法的弊病进行了改进，给出了新蒸养工艺过程的温控方案及蒸养池内温度自动控制的电气原理图，预计改进后的系统可提高产品质量，大幅度降低废品率，并能节约人力，降低人工的投入，还可为销售提供良好条件，增加经济效益。     

损伤对苹果电参数值的影响

为了探索以电学特性识别损伤果品的方法，以富士苹果为对象进行了撞击和静压损伤对苹果电参数值影响的试验。结果表明，在苹果发生损伤后0．5h内，其相对介电常数和电阻率急剧变化，3h后趋于稳定，而同期无损苹果的相对介电常数和电阻率基本保持不变。储藏期间，撞击损伤苹果的相对介电常数持续增大并出现跃变；静压损伤苹果的相对介电常数迅速增大后保持不变，而无损苹果的相对介电常数一直保持增大趋势。     

毛乌素沙地东南缘人工林樟子松根系吸水来源与影响因素

水资源短缺是我国西北旱区沙漠化防治和植被恢复重建的主要限制因子。揭示典型治沙植物根系吸水来源及其主控因子可为该地区科学治沙和水资源高效利用提供依据。本研究选取毛乌素沙地东南缘圪丑沟小流域樟子松人工林（18 – 20 年）为研究对象,通过定期采集和测定植物木质部水及其各种潜在水源（降水、土壤水和地下水）的氢氧同位素组成（δ2H和δ18O）,结合多元线性混合模型研究樟子松根系吸水来源、动态变化特征及其影响因素。结果表明：监测期间（6—11月）樟子松木质部水、降水、土壤水和地下水的δ2H值变化范围分别为?69.95‰~ ?49.25‰、?144.81‰ ~ ?6.60‰、?83.62‰ ~ ?48.57‰和?65.63‰ ~ ?53.65‰,δ18O值变化范围分别为?8.77‰ ~ ?8.21‰、?18.86‰~ ?2.07‰、?9.45‰ ~ ?6.54‰和?9.97‰ ~ ?8.26‰。雨季（7—9月）降雨量、土壤含水量和地下水位分别高于旱季（6月,10月和11月）24.8 ~ 90.10 mm,3.36 ~ 8.40%和5 ~ 15 cm。樟子松根系在6月主要利用深层土壤水（> 90 cm）（15.40%）和地下水（70.10%）,7—9月逐渐转变为以吸收浅层土壤水（< 80 cm）为主（61.03%）,10—11月随着降雨量减少,深层土壤水（> 70 cm）和地下水对樟子松根系吸水的贡献比雨季（7—9月）分别增加5.82% ~ 28.00%和20.64% ~ 23.30%。毛乌素沙地樟子松人工林根系吸水来源受土壤水分供耗和地下水位季节波动的共同影响。     

牛用恒温饮水装置研究进展及应用建议

水在维持家畜正常生理功能活动、营养代谢和生产性能方面起着重要作用,而供给充足、温度适合和清洁的饮水是提高牲畜生长性能的有效手段之一。为提高西北地区寒冷季节牲畜养殖水平和经济效益,解决牲畜饮用温水问题,介绍了牛用恒温加热饮水装置研究现状,分析了电加热、太阳能加热、沼气加热及其他加热饮水装置的应用现状及优缺点,展望了未来发展趋势,并对西北不同地区养牛场恒温加热饮水方式提出建议。      

老马涧水库渗流分析及安全评价

对坝体及坝基进行取样试验,对老马涧水库大坝最大断面在稳定渗流期的下游坡和库水位降落期的上游坝坡进行全面的抗滑稳定渗流进行分析,同时利用毕肖普法计算各工况最小安全系数对大坝给予安全评价.研究对水库的除险加固方案具有重要的指导意义.     

roGFP1探针在玉米幼胚中响应细胞氧化还原状态改变的初步研究

[目的]建立roGFP1探针响应玉米体内氧化还原状态变化的稳定表达系统.[方法]首先利用基因枪介导玉米幼胚转化法瞬时表达roGFP1基因,利用激光共聚焦显微镜405和488 nm激发光通道对10 mmol/L H2O2和2mmol/L DTT溶液处理下的幼胚进行510nm的GFP荧光成像,后通过ImageJ处理图像和分析荧光比值[405/488 nm];同时利用农杆菌介导玉米幼胚转化法开展roGFP1基因的玉米稳定转化,进行Southern Blot鉴定和荧光显微镜观察.[结果]在玉米幼胚瞬时表达系统中,经10 mmol/L H2O2处理后,roGFP1探针的荧光强度比值[405/488 nm]由原来的0.844升高至1.837,而在2 mmol/L DTT溶液处理下的荧光强度比值下降至0.911;经Southern Blot鉴定和GFP荧光检测获得了roGFP1转基因阳性植株.[结论]在玉米幼胚瞬时表达系统中,roGFP1探针能够响应由外源氧化还原剂引起的体内氧化还原状态改变;获得了表达roGFP1的转基因玉米植株.     

Gonadotropic hormone (GtH) receptors in the testis of the troutSalmo gairdneri: in vitro studies

A particulate fraction obtained from trout testis at the time of spermiation shows saturable binding sites for¹²⁵I-labeled salmon gonadotropin (¹²⁵I-GtH). Non-gonadal tissues (liver, muscle and spleen) did not demonstrate specific¹²⁵I-GtH binding. The tracer's specific activity was determined by the self-displacement method (18 to 30 Ci/g). Maximal specific binding ability of¹²⁵I-GtH varied from 20 to 30% of the labelled ligand added, depending on the hormone preparation. Specific binding of¹²⁵I-GtH to 20 mg of the testis membrane varied from 40 to 85% of the total binding depending on the method of membrane prepratation, and was competitively inhibited by concentrations of unlabelled GtH ranging from ca 1 to 1000 ng/ml of incubate. Gonadotropin of mammalian origin, ovine TSH or salmon prolactin competed only weakly, or not at all, for testicular gonadotropin binding sites (relative potencies s-GtH>>FSH=hCG>s-PRL>bTSH). Scatchard analysis of equilibrium binding studies shows that saturable gonadotropin binding was due to a class of high affinity binding sites (sites I Ka3×10¹⁰ M^–1) and possibly to a second class of lower affinity binding sites (sites II Ka=5 to 14×10⁸ M^–1). The binding capacity of sites I, as measured in enriched membrane preparations, was 45±18 fmoles/g of testis during the period of spermiation. The concentration of GtH required to obtain half maximal displacement of¹²⁵I-GtH in the binding studies was of the same order of magnitude as the apparent ED50 for GtH stimulation of 11-Cetotestosterone (11KT) secretion by trout testesin vitro. Mammalian LH and FSH were 100 to 1000 folds less potent than salmor GtH to increase 11 KT secretion.     

Minimum end‐tidal sevoflurane concentration necessary to prevent movement during a constant rate infusion of morphine,or morphine plus dexmedetomidine in ponies

ObjectiveTo compare the effects of a constant rate infusion (CRI) of dexmedetomidine and morphine to those of morphine alone on the minimum end-tidal sevoflurane concentration necessary to prevent movement (MAC_NM) in ponies.Study designProspective, randomized, crossover, ‘blinded’, experimental study.AnimalsFive healthy adult gelding ponies were anaesthetized twice with a 3-week washout period.MethodsAfter induction of anaesthesia with sevoflurane in oxygen (via nasotracheal tube), the ponies were positioned on a surgical table (T0), and anaesthesia was maintained with sevoflurane (Fe‘SEVO 2.5%) in 55% oxygen. Monitoring included pulse oximetry, electrocardiography and measurement of anaesthetic gases, arterial blood pressure and body temperature. The ponies were mechanically ventilated and randomly allocated to receive IV treatment M [morphine 0.15 mg kg^?1 (T10-T15) followed by a CRI (0.1 mg kg^?1 hour^?1)] or treatment DM [dexmedetomidine 3.5 μg kg^?1 plus morphine 0.15 mg kg^?1 (T10-T15) followed by a CRI of dexmedetomidine 1.75 μg kg^?1 hour^?1 and morphine 0.1 mg kg^?1 hour^?1]. At T60, a stepwise MAC_NM determination was initiated using constant current electrical stimuli at the skin of the lateral pastern region. Triplicate MAC_NM estimations were obtained and then averaged in each pony. Wilcoxon signed-rank test was used to detect differences in MAC between treatments (a = 0.05).ResultsSevoflurane-morphine MAC_NM values (median (range) and mean ± SD) were 2.56 (2.01–4.07) and 2.79 ± 0.73%. The addition of a continuous infusion of dexmedetomidine significantly reduced sevoflurane MAC_NM values to 0.89 (0.62–1.05) and 0.89 ± 0.22% (mean MAC_NM reduction 67 ± 11%).Conclusion and clinical relevanceCo-administration of dexmedetomidine and morphine CRIs significantly reduced the MAC_NM of sevoflurane compared with a CRI of morphine alone at the reported doses.     

A Deliberation in Design Standard for Energy Efficiency of Buildings in Hot Summer and Cold Winter Zone

A contradiction existed in "Design Standard for Energy Efficiency of Residential Buildings in Hot Summer and Cold Winter Zone(JGJ-134-2001)" is pointed out through calculations and the contradiction is perfectly solved by means of interrelation principle between window and wall.At the same time the constant form principle of equal thermal resistance in parallel connection between window and wall is advanced to make the controlling indexes for enclosure in buildings satisfy perfectly the requirement for energy efficiency.