噻虫嗪防治油菜籽苗期黄条跳甲的药效试验

以十字花科油菜籽为试材,应用常规种子拌种包衣的方式,以1 kg种子用600 g/L吡虫啉悬浮种衣剂有效成分4.2 g为药剂对照,进行了1 kg种子用70％噻虫嗪种子处理可分散粉剂有效成分280 g和350 g以及40％噻虫嗪悬浮种衣剂有效成分280 g和350 g对油菜籽苗期黄条跳甲防治效果的田间试验。结果表明：使用70％噻虫嗪种子处理可分散粉剂和40％噻虫嗪悬浮种衣剂有效成分280 g和350 g进行油菜籽种子包衣,均能有效防治油菜籽苗期黄条跳甲的为害。其中,70％噻虫嗪种子处理可分散粉剂有效成分用量为350 g时防效最高,40％噻虫嗪悬浮种衣剂有效成分用量为350 g时防效次之,且这2个药剂处理的持效期均长,防治效果均好。该技术可以在防治油菜籽及其他十字花科蔬菜苗期黄条跳甲上大面积推广使用。     

NaCl溶液添加湿润剂灌溉对土壤入渗过程的影响

为进一步认识微咸水的入渗规律,采用室内土柱入渗试验,对比分析了不同矿化度(0,1,3,5g/L)的NaCl溶液加入湿润剂进行灌溉后盐碱土累积入渗量和入渗率随时间的变化,验证了在盐碱土中微咸水加湿润剂情况下不同公式描述入渗过程的适应性,并分析了全盐量和氯离子的剖面分布。结果表明:NaCl溶液添加湿润剂灌溉后,盐碱土的入渗能力随NaCl溶液矿化度的增加呈先增加后减小的趋势,入渗能力在NaCl溶液矿化度为3g/L时达到最大,超过3g/L后随NaCl溶液矿化度的增大而减小。湿润土层剖面含盐量及Cl-浓度在相同湿润锋随NaCl溶液矿化度的增加而增大,在湿润锋前达到最大。NaCl溶液矿化度为3g/L时,剖面含水率最大,其次是5,1,0g/L。4种不同矿化度NaCl溶液添加湿润剂条件下,Kostiakov公式的入渗率拟合值和实测值最为接近。     

Quantifying the fine scale (1km × 1km) exposure and effects of ozone. Part 1. Methodology and application for effects on forests

Surface ozone concentrations show very large local variability. This, in rural areas, is largely a consequence of the degree to which the surface air is decoupled from the bulk of the atmosphere by nocturnal and winter stability effects and of the aerodynamic roughness and topography of the countryside. Procedures have been developed to simulate these effects and have been used with O₃ data from a regional monitoring network to quantify exposure of vegetation to mean and peak O₃ concentrations. The index of exposure to potentially phytotoxic O₃ concentrations is the AOT40 (accumulated exposure over a threshold of 40 ppb) expressed in ppb.h. The accumulated exposure of crop and forest surfaces to ozone is shown to increase approximately linearly with altitude and along a gradient from 3000 ppb.h in north west Scotland to 7000 ppb.h in the south of England. The area of UK forest which exceeds the critical level for ozone effects (10⁴ ppb.h above 40 ppb) totals 2.0 × 10⁴ km² and represents 47% of afforested land. The areas affected include most of southern and central England and Wales and large plantation forests of Northumberland and the Scottish borders.     

特早熟棉花新品种晋棉40选育报告

晋棉40是山西省农业科学院经济作物研究所以丰产、优质的棉花新品种晋棉10为母本,用抗病、早熟的品种辽101作父本进行杂交,采用系统选育而成的特早熟棉花新品种。2004年在山西省特早熟棉区棉花生产试验中平均折合皮棉产量832.5 kg/hm2,比对照品种晋棉37增产13.96%。经鉴定,该品种纤维品质达到国家标准,抗枯萎病,耐黄萎病。适宜在特早熟棉区春播,黄河流域棉区夏播。     

40%高氯·马乳油对柑橘蚜虫大面积防治试验

用40%高氯.马乳油1∶2000倍液对柑橘地的柑橘蚜虫进行大田药效试验,结果表明:40%高氯.马乳油对柑橘蚜虫防治效果稳定,达90%以上,可大面积推广使用。     

建所40年成果丰硕

介绍了中国农业科学院蚕业研究所建所40周年(1951—1991)来在品种选育,栽桑养蚕技术,蚕、桑病虫害防治,蚕、桑机具改革,提高茧丝质量,蚕业基础理论研究和高新技术开发应用,开展国内外学术交流等方面的丰硕成果,已初步建成了学科门类齐全、专业结构合理的国家蚕业科学研究机构。提出本所蚕业科研工作的今后任务:进一步面向经济建设,面向世界,面向21世纪,推进科技体制改革,发挥本所优势和特色,开拓延伸研究领域,培养一支高水平的科技队伍,为蚕业生产提供更多、更具经济、社会效益的科研成果,为中国蚕丝业的繁荣昌盛作出新的贡献。     

水稻新品种“赣早籼40号”的选育

:“赣早籼 40号”属中早熟早籼水稻新品种 ,该品种丰产稳产 ,品质较优 ,中抗稻瘟病和白叶枯病 ,适合江西、湖南等双季稻区作优质早稻搭配种植     

无籽西瓜新品种新优40号的选育

新优40号是新疆乌鲁木齐市农垦局种子公司西甜瓜研究所选育的优质、抗病、坐果性优良的杂交一代中熟无籽西瓜新品种。该品种全生育期87d,果实发育期32d;果实圆形,果皮墨绿覆隐条带,瓤色红,瓤质细脆多汁,无籽性好,中心可溶性固形物含量11.5/左右;单果重4kg左右,667m2产量3500kg。2007年3月通过新疆维吾尔自治区农作物品种审定委员会审定。     

Tet-on系统诱导猿猴病毒40T在CHO细胞中的表达

四环素诱导表达系统（Tet-off／Tet-on系统）是比较成熟的真核生物基因诱导表达系统之一,具有高效、无毒、严密开／关功能的特点。猿猴病毒40T（SV40T）是一种病毒癌蛋白,其与肿瘤抑制蛋白p53和Rb结合,并使之失活,从而消除它们抑制细胞生长的功能,使细胞分裂加速,形成肿瘤。利用Tet-on系统首先稳定筛选获得了表达Tet-on系统调节元件rtTA的阳性细胞CHO-pTet-on,再通过稳定筛选又成功得到导入其反应元件的双阳性细胞CHO-pTet-on-pTRE2-SV40T-Hyg,经强力霉素诱导表达了目的基因SV40T,建立了Tet-on基因诱导表达系统的细胞诱导表达研究平台。     

Expression of FBXW7 in diabetic cardiomyopathy

AIM:To investigate the expression of F-box/WD repeat-containing protein 7 (FBXW7) in the myocardium of type 1 diabetic rats and to clarify its role in the development of diabetic cardiomyopathy. METHODS:All rats were randomly divided into non-diabetic (ND) group, 4-week diabetes mellitus (DM) model group, 8-week DM mo-del group and 12-week DM model group. The DM model was prepared by intraperitoneal injection of streptozotocin (60 mg/kg). The change of myocardial pathological structure was investigated by HE staining. The FBXW7 expression level in the myocardium was determined by Western blot and immunohistochemistry methods. RESULTS:DM induced cardiomyocyte degeneration and necrosis as shown by cardiac histological analysis. Both Western blot and immunohistochemistry results showed that the expression level of FBXW7 was significantly increased in 4-week, 8-week and 12-week DM groups compared with control group (P<0.01). However, The FBXW7 expression level in 12-week DM group was decreased compared with 4-week and 8-week DM groups. CONCLUSION:With the development of diabetes, the expression of FBXW7 in the myocardium of the rats with diabetic cardiomyopathy shows a tendency to increase first and then decrease, suggesting that it plays some roles in the development of diabetic cardiomyopathy.