黄化(xanthation )也称黄酸化或黄原酸化,黏胶纤维生产中的一个工序。将经老成后的碱纤维素,加入二硫化碳(CS2)与之反应,生成可溶解在稀碱液中的纤维素的黄原酸酯,故名黄化。该生成物呈橙黄色,能很好地溶解在稀碱液中,生成黏稠的胶体溶液,是为黏胶溶液。由于二硫化碳是易燃、易爆的有毒液体,黄化车间需有相应的防爆措施和严格的管理制度。
n. yellowing ; etiolation
植原体对四环素类的抗生素较敏感,而对青霉素不敏感;常常引起植物丛枝(witches’ -broom)、黄化(yellowing)、花变叶(phyllody)、衰退(withering)、绿变(virescence)、矮化(stunting)、白叶(white leaf)等症状。
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Major factors of the pear iron chlorosis were determined through soil testing and leaf analysis.
通过对酥梨缺铁黄化症的土壤分析、叶片分析来确定诱发黄化的主要因素。
参考来源 - 酥梨缺铁黄化症及矫治技术的研究The etiolation symptom of the ginkgo leaf can be effective meliorated by using HAF.
5 腐植酸复合肥能有效地改善银杏叶缘黄化现象。
参考来源 - 腐植酸复合肥对银杏实生苗综合效应的研究The results showed that use of KT,6-BA or CPPU on harvested broccoli delayed floret yellowing and chlorophyll degradation,decreased respiration and ethylene production rate,postponed climacteric time,and retarded membrane permeability loss.
结果表明:3种细胞分裂素类生长调节剂处理均在不同程度上延缓了青花菜花蕾黄化和叶绿素分解,推迟了呼吸和乙烯跃变峰出现的时间,降低了峰值,并维持了细胞膜稳定性。
参考来源 - 细胞分裂素类生长调节剂对青花菜采后衰老的影响·2,447,543篇论文数据,部分数据来源于NoteExpress
叶片黄化是叶片衰老过程中很直观的现象,与叶绿素降解和叶绿素-蛋白复合体降解有关。
Yellowing, which is related to the degradation of chlorophyll and chlorophyll–protein complexes, is a notable phenomenon during leaf senescence.
该品种较抗褐斑病和黄化毒病。
富士苹果黄化茎段再生不定芽的研究。
Adventitious buds regeneration from etiolated internode segment of apple cultivar Nagafu no.
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