共查询到19条相似文献,搜索用时 71 毫秒
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肿柄菊有机肥料的研究进展 总被引:1,自引:0,他引:1
肿柄菊作为有机肥料可以显著提高旱地、山地等贫瘠土壤的肥力,促进粮食增产,对保障粮食安全有着重要的意义.综述了肿柄菊有机肥料的研究进展,讨论了研究中存在的问题,并对其前景进行了展望. 相似文献
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杀线虫剂活性测定线虫死活染色鉴别的研究 总被引:6,自引:0,他引:6
线虫的死活鉴别是困难的,在杀线剂活性测定中,我们摸索了几种生物染料对线虫死活的染色,并筛选出曙红和番红花红对线虫死活鉴别效果较好,而且染色剂的浓度、染色时间和温度对染色效果都有一定的影响。 相似文献
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4种杀线虫剂对南方根结线虫的室内活性测定 总被引:1,自引:0,他引:1
通过藏红T染色法,确定线虫染色时间,并测定4种常规药剂对南方根结线虫的室内活性。结果显示,染色1 h后,线虫的染色率达到100%。1.8%阿维菌素EC和40%灭线磷EC对南方根结线虫具有良好的活性,LC_(50)值分别为14.926 3 mg/L和15.306 8 mg/L;40%辛硫磷EC和200 g/L丁硫克百威EC活性较差。 相似文献
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试验测定了使君子Quisquabis indical和巴豆Croton tiglium在碱水溶液中的提取物对柑橘全爪螨的毒杀活性,并且测定了使君子和巴豆不同比例混合物对柑橘全爪螨的毒杀作用和增效作用.测定结果表明使君子和巴豆的碱水提取液在10 mg/L时单独使用对柑橘全爪螨24 h的校正死亡率分别为94.50%、100%,不同比例混合试验显示:对柑橘全爪螨触杀毒性最强的是使君子和巴豆提取物以1:2的比例混合的混合物.其LC50值和LC95值分别为0.8545、2.9500 mg/L,混剂的供毒系数为270.2589.此外当使君子和巴豆的提取物以1:1的比例混合时,其LC50值和LC95值分别为0.8150、3.7843 mg/L,混剂的供毒系数为279.8057,说明使君子和巴豆以1:1到2:1之间的比例混合时有较强的增效作用. 相似文献
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阿维菌素对南方根结线虫的生物活性 总被引:5,自引:0,他引:5
采用直接触杀法测定了阿维菌素对南方根结线虫的杀线活性。结果表明,1.8%阿维菌素EC对南方根结线虫具有很强的杀线活性,其LC50为1.48mg/L,而10%噻唑膦GR的LC50为13.90mg/L,表明1.8%阿维菌素EC对南方根结线虫的杀线活性明显高于对照药剂10%噻唑膦GR,具有广阔的应用前景和开发价值。 相似文献
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飞机草粗提物对棉铃虫的生物活性 总被引:8,自引:0,他引:8
报道了飞机草粗提物对棉铃虫幼虫拒食、毒杀的生物活性。试验表明 ,2 0 g/L飞机草粗提物对 3龄棉铃虫幼虫非选择性拒食率较高 (73 81% ) ;2 0、16g/L飞机草粗提物对棉铃虫幼虫的校正死亡率为 6 9 3%和 6 3 6 %。 相似文献
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以4种细菌,大肠埃希菌(Escherichia coli)、金黄色葡萄球菌(Staphylococcus aureus Rosenbach)、枯草芽孢杆菌(Bacillus subtilis)、铜绿假单胞菌(Pseudomonas aeruginosa)和4种真菌,白色念珠菌(Candida albicans)、番木瓜炭疽菌(Colletotrichum papayae P.Henn)、芒果炭疽菌(Colletotrichum gloeosporioides)、芒果蒂腐菌(Dothiorella dominicana)作为供试菌,用圆形纸片法对海南2种江蓠(海南江蓠和细基江蓠)的乙醇、石油醚、乙酸乙酯、正丁醇提取物进行抗菌活性比较研究。结果表明:2种江蓠提取物均具有较为广谱的抗菌能力,且不同提取物的抗菌活性物质、抗菌活性和范围不同,海南江蓠的抗菌效果优于细基江蓠。 相似文献
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采用索式提取和微波2种方式分别对紫花地丁进行提取,并运用生长速率法测定了各提取物对植物病原真菌的抑制作用。实验结果表明:在4.0 g/L时,微波提取物的抑菌活性(最高86.9%)明显高于索式提取物的活性(最高64.7%)。丙酮提取物对棉花枯萎病菌、柑橘炭疽病菌和小麦全蚀病菌的EC50分别是3.04,2.90,2.78 g/L。 相似文献
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Effects of Manganese on Genomic Integrity in the Multicellular Model Organism Caenorhabditis elegans
Merle M. Nicolai Ann-Kathrin Weishaupt Jessica Baesler Vanessa Brinkmann Anna Wellenberg Nicola Winkelbeiner Anna Gremme Michael Aschner Gerhard Fritz Tanja Schwerdtle Julia Bornhorst 《International journal of molecular sciences》2021,22(20)
Although manganese (Mn) is an essential trace element, overexposure is associated with Mn-induced toxicity and neurological dysfunction. Even though Mn-induced oxidative stress is discussed extensively, neither the underlying mechanisms of the potential consequences of Mn-induced oxidative stress on DNA damage and DNA repair, nor the possibly resulting toxicity are characterized yet. In this study, we use the model organism Caenorhabditis elegans to investigate the mode of action of Mn toxicity, focusing on genomic integrity by means of DNA damage and DNA damage response. Experiments were conducted to analyze Mn bioavailability, lethality, and induction of DNA damage. Different deletion mutant strains were then used to investigate the role of base excision repair (BER) and dePARylation (DNA damage response) proteins in Mn-induced toxicity. The results indicate a dose- and time-dependent uptake of Mn, resulting in increased lethality. Excessive exposure to Mn decreases genomic integrity and activates BER. Altogether, this study characterizes the consequences of Mn exposure on genomic integrity and therefore broadens the molecular understanding of pathways underlying Mn-induced toxicity. Additionally, studying the basal poly(ADP-ribosylation) (PARylation) of worms lacking poly(ADP-ribose) glycohydrolase (PARG) parg-1 or parg-2 (two orthologue of PARG), indicates that parg-1 accounts for most of the glycohydrolase activity in worms. 相似文献
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Tun-Chieh Chen How-Ran Chao Ching-Ying Wu Yun-Ru Lai Chu-Huang Chen Tohru Yoshioka Wen-Li Hsu Ming-Hsien Tsai 《International journal of molecular sciences》2021,22(16)
Human breast milk lipids have major beneficial effects: they promote infant early brain development, growth and health. To identify the relationship between human breast milk lipids and infant neurodevelopment, multivariate analyses that combined lipidomics and psychological Bayley-III scales evaluation were utilized. We identified that 9,12-octadecadiynoic acid has a significantly positive correlation with infant adaptive behavioral development, which is a crucial neurodevelopment to manage risk from environmental stress. To further clarify the biological function of 9,12-octadecadiynoic acid in regulating neurodevelopment, Caenorhabditis elegans (C. elegans) was used as a model to investigate the effect of 9,12-octadecadiynoic acid on neurobehavioral development. Supplementation with 9,12-octadecadiynoic acid from the L1 to L4 stage in larvae affected locomotive behaviors and foraging ability that were not socially interactive, implying that 9,12-octadecadiynoic acid is involved in regulating the serotonergic neuronal ability. We found that supplementary 0.1 μM 9,12-octadecadiynoic acid accelerated the locomotive ability and foraging ability via increasing the expression of serotonin transporter mod-1. Antioxidant defense genes, sod-1, sod-3 and cyp-35A2 are involved in 9,12-octadecadiynoic acid-induced motor neuronal activity. Nevertheless, supplementary 9,12-octadecadiynoic acid at concentrations above 1 μM significantly attenuated locomotive behaviors, foraging ability, serotonin synthesis, serotonin-related gene expressions and stress-related gene expression, resulting in the decreased longevity of worms in the experiment. In conclusion, our study demonstrates the biological function of 9,12-octadecadiynoic acid in governing adaptive behavioral development. 相似文献