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1.
徐友辉 《四川职业技术学院学报》2003,13(1):92-93
85％增效机油乳剂是用于防治蚧、蚜、螨等害虫的一种乳油类农药，此种农药采用精脂酸钠和松香钠皂作乳化剂、工业乙醇作助剂和有机农药胺甲萘作增效剂，该工艺生产的85％增效机油乳剂具有质量稳定、药效明显等特点。 相似文献
2.
徐绍颖 《中国科教创新导刊》2000,(3):14-15
美国在90年代中期就批准使用导人病虫防治特性和抗除草剂特性的转基因作物。这些作物主要有：BT棉花、抗除草剂玉米和抗除草剂黄豆。BT棉花含有来自土壤的苏云金杆菌（BT）基因,作物自身可产生BT毒素以保护整株植物免受某些鳞翅目昆虫的危害,从而可以不用或少用化学杀虫剂;过去在用除草剂杀死杂草时可能使作物也受到除草剂的损害,而抗除草剂玉米和抗除草剂黄豆使作物能在应用除草剂后生存,从而可使农民更有效地使用除草剂。这些作物种植以来的实际表现如何？与传统作物相比,它们是否真正给农业带来了好处？哪些因素影响它们的应用… 相似文献
3.
根据阴/非离子表面活性剂复配性能的规律,选用价格便宜的常见表面活性剂和无机盐助剂,经配方实验,研制出了新型有助剂洗衣液.实验结果表明,结晶型层状硅酸钠作为助剂可配制性能良好的有助剂无磷洗衣液. 相似文献
4.
采用室内模拟添加法和盆栽法分别研究了不同玉米品种对磺酰脲类除草剂的敏感性和磺酰脲类除草剂对敏感玉米品种苗期影响。结果表明：供试玉米品种对磺酰脲类除草剂存在不同程度的敏感性差异,该类除草剂ED50/50以上浓度对玉米苗期的根长、株高、叶面积有明显影响。 相似文献
5.
根据阴／非离子表面活性剂复配性能的规律，选用价格便宜的常见表面活性剂和无机盐助剂，经配方实验，研制出了新型有助剂洗衣液。实验结果表明，结晶型层状硅酸钠作为助剂可配置性能良好的有助剂无磷洗衣液。 相似文献
6.
对以绿氧与ML为助剂的杨木蒸煮中试结果做了比对,结果表明两种助剂都可满足生产要求,但是与绿氧相比,ML助剂可以减少蒸煮的用碱量和浆的生产成本。 相似文献
7.
抗除草剂转基因作物的应用及其潜在的风险 总被引：1，自引：0，他引：1
瞿宏杰 《襄樊职业技术学院学报》2005,4(6):4-5
抗除草剂转基因作物已在很多国家大规模种植，并且取得了显著的经济效益。综述了抗除草剂转基因作物的应用及其潜在的风险。 相似文献
8.
贾静娴 《唐山师范学院学报》2002,24(5):30-31
介绍了国内外洗涤助剂的发展状况，传统洗涤助剂磷酸盐被限制，沸石类助剂有局限，层状硅酸钠以优良的洗涤性能，环保无污染的特点，成为洗涤工业的新宠。 相似文献
9.
磺酰脲类除草剂对玉米敏感性研究 总被引：3，自引：0，他引：3
采用室内模拟添加法和盆栽法分别研究了不同玉米品种对磺酰脲类除草剂的敏感和和磺酰脲类除草剂对敏感玉米品种苗期影响。结果表明：供试玉米品种对磺酰脲类除草剂存在不同程度的敏感性差异,该类除草剂ＥＤ５０／５０以上浓度对玉米苗期的根长、株高、叶面积有明显影响。 相似文献
10.
杂草抗药性与化学防除 总被引：6，自引：0，他引：6
抗除草剂杂草的出现和发展，对化学除草剂的推广使用提出新的挑战，使人们在除草剂作用机理以及抗药性机理的同时，筛选和分离抗性基因，最后获得抗除草剂的转基因植物。 相似文献
11.
An incubation study was conducted to investigate the effects of metsulfuron-methyl herbicide on the soil microbial biomass
in loamy sand soil. The herbicide was applied to the soil at four concentrations: control, 0.01, 0.10, and 1.00 μg·g−1 soil. Determinations of microbial biomass-C and microbial biomass-N contents were carried out 1, 3, 5, 7, 10, 15, 25, and
45 days after herbicide application. In comparison to untreated soil, the microbial biomass-C and biomass-N decreased significantly
in soils treated with herbicide at concentrations of 0.1 and 1.0 μg·g−1 soil within the first 7 days of incubation. The application of metsulfuron-methyl herbicide to the soil reduced the Cmic/Corg and Nmic/Ntotal percentages, which decreased with increasing application rate of metsulfuron-methyl herbicide. Compared to the untreated
control, a marked increase in the microbial biomass C: N ratio was observed in the herbicide treated soil. This effect was
transitory and was significant only at the higher rates of metsulfuron-methyl.
Project supported by NSFC (No. 49871044) and the Laboratory of Materials Cycling in Pedosphere, Academia Sinica. 相似文献
12.
13.
以采用Schaal烘箱法测定过氧化值(POV),研究白藜芦醇对油脂的抗氧化能力。结果表明,白藜芦醇对油脂有良好的抗氧化效果。白藜芦醇在0.01%～0.06%添加量范围内抗氧化效果存在量效关系。添加VC、柠檬酸对白藜芦醇的抗氧化作用具有协同增效作用,其抗氧化活性优于自身单一成分。其中白藜芦醇、Vc、柠檬酸以3∶2∶2的比例复配时,其抗氧化协同增效作用最为显著。 相似文献
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15.
用不同浓度的乙草胺对小麦幼苗染毒处理,检测小麦幼苗内的过氧化氢酶（CAT）活性的变化．结果表明：各实验组随染毒时间的延长,在不同质量浓度乙草胺的胁迫下,小麦幼苗细胞的CAT活性呈现出不同的变化趋势．在低质量浓度时,CAT活性表现出先下降后升高,再降低的特点;在中质量浓度时,CAT活性表现出先升高后下降,再升高的特点;在高质量浓度时,CAT活性表现出缓慢下降的特点．在乙草胺的胁迫下,小麦幼苗内cAT活性与对照组相比,差异极显著（P〈0．01）．结论：乙草胺对小麦幼苗有较强的毒性效应． 相似文献
16.
知白守黑--由赵无极绘画色彩看"黑白"在中国现代抽象油画中的地位 总被引：2，自引：0，他引：2
惠波 《连云港师范高等专科学校学报》2002,(2):40-43
“黑白”作为中国传统水墨画中主要的色彩语言 ,已经形成了中国所特有的“墨文化” ,但这种对于“黑白”的喜爱 ,近来在一些中国现代抽象油画中也屡有体现。其中综观中国现代抽象油画的代表人物———赵无极先生油画作品的画面色彩构成 ,可以发现“黑白”在其中占据着极为重要的地位 ,并且由“黑白”在画面中组成了有别于欧美抽象油画的气韵和画面空间 ,从而形成了具有“东方色彩”的抽象绘画形式。所以研究“黑白”在画面色彩构成中的地位及成因 ,以及这种地位所形成的画面效果 ,对于研究中国现代抽象油画无疑具有一定的现实意义 相似文献
17.
丙烯酸十二酯以外的其它丙烯酸高级酯的均聚物及与第二单体 A（丙烯腈）的共聚物对标准基础油基本无降凝效果,但应对润滑油有较好的增粘作用。采用溶液聚合方法,用正交试验法对丙烯酸十二酯以外的其它丙烯酸高级酯与第二单体A进行聚合试验,将聚合物以质量分数为1％的添加量加入到润滑油基础油中,对调合油的粘度进行测定,以增比粘度ηsp 、粘温指数 Q和粘度指数VI为考察目标,探讨丙烯酸十二酯以外的其它丙烯酸高级酯的均聚物及与第二单体 A的共聚物对润滑油基础油的增粘作用。 相似文献
18.
徐友辉 《四川职业技术学院学报》2007,17(1):106-107
用金属切削乳化油与水稀释成的乳化液在金属切削加工中具有冷却、润滑、清洗和防锈作用．乳化油的种类很多,生产工艺不尽相同,本文介绍了一种利用精脂酸和松香与碱直接皂化的产物作乳化剂、乙醇作稳定剂、加入高效防锈剂和极压剂来生产金属切削乳化油的新工艺．实践表明,采用这种工艺生产出的金属切削乳化油润滑性能和防锈性能好、乳化速度快、安定性好、具有一定经济效益． 相似文献
19.
A 21-day laboratory incubation experiment was conducted to investigate the impact of pesticides (insecticide, herbicide, fungicide)
on paddy field soil health under controlled moisture (flooded soil) and temperature (25°C) environment. The electron transport
system (ETS)/Dehydrogenase activity showed negative correlation with pesticides concentrations, decreased with increase of
pesticide concentration. The higher doses (5 to 10 times field rates) of pesticides significantly inhibited ETS activity,
while lower rates failed to produce any significant reducing effect on the control. The toxicity of pesticides in decreasing
the ETS activity was in the order: insecticide > fungicide > herbicide, irrespective of their rates of application. The pesticides
increased the soil phenol content, which increased with increasing concentration of agrochemicals. The pesticide application
did not produce any significant change in soil protein content. The response of biomass phospholipid content was nearly similar
to that of ETS activity. The phospholipid content decreased with the addition of pesticides in the order insecticide > fungicide
> herbicide and the toxicity was in the order: 10 FR (field rate) > 5 FR > 1.0 FR > 0.5 FR > control.
Project (No. G1999011809) supported by the National Key Basic Research Foundation (973) of China
Ph. D. student at Zhejiang University, from Ministry of Agriculture (Punjab), Government of Pakistan 相似文献
20.
Cytotoxicity and enhancement activity of essential oil from Zanthoxylum bungeanum Maxim. as a natural transdermal penetration enhancer简 总被引：2，自引：0，他引：2
Yi Lan Qing Wu Ying-qiu Mao Qiong Wang Jing An Yan-yan Chen Wen-ping Wang Bo-chen Zhao Na Liu Ye-wen Zhang 《Journal of Zhejiang University. Science. B》2014,15(2):153-164
The aim of this present study is to investigate the effect of Zanthoxylum bungeanum oil (essential oil from Z. bungeanum Maxim.) on cytotoxicity and the transdermal permeation of 5-fluorouracil and indomethacin. The cytotoxicity of Z. bungeanum oil on dermal fibroblasts and epidermal keratinocytes was studied using an MTT (3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide) assay. The rat skin was employed to determine the percutaneous penetration enhancement effect of Z. bungeanum oil on hydrophilic and lipophilic model drugs, i.e., 5-fluorouracil and indomethacin. The secondary structure changes of the rat stratum corneum (SC) were determined using attenuated total reflectance-Fourier transform infrared spectroscopy (ATR-FTIR), and saturated solubilities and SC/vehicle partition coefficients of two model drugs with and without Z. bungeanum oil were also measured to understand its related mechanisms of action. It was found that the half maximal inhibitory concentration (IC50) values of Z. bungeanum oil were significantly lower in HaCaT and CCC-ESF-1 cell lines compared to the well-established and standard penetration enhancer Azone. The Z. bungeanum oil at various concentrations effectively facilitated the percutaneous penetration of two model drugs across the rat skin. In addition, the mechanisms of permeation enhancement by Z. bungeanum oil could be explained with saturated solubility, SC/vehicle partition coefficient, and secondary structure changes of SC. 相似文献