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硼镁钙生物土壤调理剂的研究与开发 总被引:1,自引:0,他引:1
《化肥工业》2018,(6)
针对目前我国环境污染,尤其是土壤污染的现状,研究开发适合我国国情、满足我国农业"高产、质优、安全、环保"要求的土壤调理剂已成为当务之急。硼镁钙生物土壤调理剂是将生产硼砂的废弃物与低品位硼镁矿石、高品位腐殖酸和复合微生物菌剂经科学加工而成,具有节能减排、改良和修复土壤、提高肥料利用率、增强作物抗逆性、改善产品品质、提高产量等功能。 相似文献
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本实验采用不同浓度的腐植酸钾处理纯培养条件下的烟草青枯菌,研究腐植酸钾对烟草青枯菌的抑制作用。同时将不同浓度的腐植酸钾施加入土壤,研究腐植酸钾对土壤微生物群的作用,为合理利用腐植酸钾来防治植物青枯病提供参考。 相似文献
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几种诱抗剂诱导烟草抗青枯病效果及其与链霉素混用增效作用 总被引:1,自引:0,他引:1
[目的]筛选对烟草青枯病有防治效果的诱抗剂及混配剂,为防治烟草青枯病寻找有效的药剂及方法。[方法]对烟草植株喷施不同质量浓度的诱抗剂单剂和诱抗剂与链霉素的混剂48 h后,采用茎基部穿刺法对烟草接种青枯病菌(Ralstonia solanacearum),置于光照培养箱内培育。[结果]200 mg/L壳聚糖处理的烟草在接种烟草青枯菌后7 d诱导抗性效果达79.17%。50 mg/L苯并噻二唑(BTH)与100 mg/L链霉素混用后增效系数为139。[结论]壳聚糖在50 mg/L时就有较好的诱导烟草抗青枯病效果;BTH与链霉素混用后增效作用明显,可作为防治烟草青枯病的一个方法。 相似文献
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苯乙烯是重要的石油化工原料。本文介绍了国内外苯乙烯生产的发展概况,合成乙苯,苯乙烯所用的催化剂种类,并就苯乙烯生产及催化剂的发展趋势提出了自己的观点。 相似文献
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《国际聚合物材料杂志》2012,61(1-4):113-122
Abstract Kinetics and mechanisms of oxidation of 6 acetals by molecular oxygen and ozone in liquid phase have been studied. Reaction with molecular oxygen (70°C, 15–16 hr) leads to the formation monoethers of the corresponding glycols with 68–90% selectivity. Salts of metals and complexes with crown-ethers have increased the reaction rate significally. Ozone have reacted with acetals with formation similar products. The mechanisms of intermediate stages have been proposed. 相似文献
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责任是人应主动承担的角色义务和对其因过失所造成后果应承担的责罚.有两层涵义:一是义务;二是后果.责任心是个体自觉做好分内事务和履行道德义务的心理倾向,是个性心理品质成分中自我特征维度上的重要内容.责任心具有两个方面的涵义:一是角色分内职责;二是角色道德义务.责任心是一种通过责任认知、责任个性和责任适应的动态形式表现出来的静态品质,责任心是责任心过程结构与责任心关系结构相互制约、相互影响的统一体. 相似文献
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The variation of the Au 4f binding energy of Au clusters with the cluster size has been established by measuring the binding energies of clusters whose size distributions were independently determined by HREM and STM. The binding energy increases significantly when the cluster size is less than 2 nm. Au-Cu bimetallic clusters of the composition Cu3Au have been deposited for the first time on carbon substrates. The shifts in the core level binding energies of the bimetallic clusters show the effect of alloying in the case of large clusters, but show effects of both alloying and cluster size in the case of the small clusters. The interaction of CO with Cu3Au clusters is stronger than with a bulk Cu metal. The interaction of CO with small Cu clusters also seems to be stronger than with bulk Cu or with large Cu clusters. 相似文献
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对用甘油锌作光稳定剂的光稳定作用进行了测试,并与光稳定剂NBC,BZ进行了比较。研究了甘油锌,NBC和BZ与双酚A的复配效果。研究结果表明,甘油锌是一种性能优良的光稳定剂。 相似文献
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Antioxidative activity and phenolic composition of pilot-plant and commercial extracts of sage and rosemary 总被引:5,自引:0,他引:5
Marie-Elisabeth Cuvelier Hubert Richard Claudette Berset 《Journal of the American Oil Chemists' Society》1996,73(5):645-652
Eight sage (Salvia officinalis) and twenty-four rosemary (Rosmarinus officinalis) extracts, originating from pilot-plant or commercial sources, had different antioxidative activities as measured by accelerated
autoxidation of methyl linoleate. Twenty-seven compounds were characterized in the Labiatae family extracts by high-performance
liquid chromatography (HPLC) coupled with mass spectrometry, equipped with an atmospheric pressure chemical ionization interface,
and by HPLC coupled with a photodiode array spectrophotometer. Twenty-two compounds were identified, including phenolic acids,
carnosol derivatives, and flavonoids. The extracts showed great variation in their HPLC profiles, and no correlation was apparent
between their antioxidative efficiency and their composition, in twenty specific phenols. Data indicated that the most effective
compounds were carnosol, rosmarinic acid, and carnosic acid, followed by caffeic acid, rosmanol, rosmadial, genkwanin, and
cirsimaritin. 相似文献