英语翻译Abstract—Three different acyl thiourea derivatives of ch

英语翻译
Abstract—Three different acyl thiourea derivatives of chitosan (CS) were synthesized and their structures were characterized by
FT-IR spectroscopy and elemental analysis.The antimicrobial behaviors of CS and its derivatives against four species of bacteria
(Escherichia coli,Pseudomonas aeruginosa,Staphylococcus aureus,and Sarcina) and four crop-threatening pathogenic fungi (Alternaria
solani,Fusarium oxysporum f.sp.vasinfectum,Colletotrichum gloeosporioides (Penz.) Saec,and Phyllisticta zingiberi) were
investigated.The results indicated that the antimicrobial activities of the acyl thiourea derivatives are much better than that of
the parent CS.The minimum value of MIC and MBC of the derivatives against E.coli was 15.62 and 62.49 lg/mL,respectively.
All of the acyl thiourea derivatives had a significant inhibitory effect on the fungi in concentrations of 50–500 lg/mL; the maximum
inhibitory index was 66.67%.The antifungal activities of the chloracetyl thiourea derivatives of CS are noticeably higher than the
acetyl and benzoyl thiourea derivatives.The degree of grafting of the acyl thiourea group in the derivatives was related to antifungal
activity; higher substitution resulted in stronger antifungal activity.
\2 2007 Elsevier Ltd.All rights reserved.
Keywords:Antibacterial activity; Antifungal activity; Chitosan; Acyl thiourea derivatives

摘要- 3个不同的酰基硫脲衍生物的壳聚糖（ CS ）的合成和其结构的特点
红外光谱和元素分析.抗菌性能的政务司司长及其衍生物对4种细菌
（大肠杆菌,绿脓杆菌,金黄色葡萄球菌,及包裹）和4个作物受到威胁的病原真菌（链格孢
菌,枯萎病楼霉菌vasinfectum ,炭疽病菌（ penz.） saec ,phyllisticta zingiberi ）
调查.结果表明,该抗菌活性的酰基硫脲衍生物的好得多,比对
母公司政务司司长.最小值的MIC和MBC的衍生物对大肠杆菌是15.62和62.49 LG电子/毫升,分别.
所有的酰基硫脲衍生物有一个显着抑制效应对真菌的浓度50-500 LG电子/毫升;最高
抑制指数为66.67 ％ .抗真菌药物的活动,该chloracetyl硫脲衍生物的政务司司长明显高于
乙酰基和苯甲酰脲衍生物.的程度,嫁接的酰基硫脲集团在衍生工具是与抗真菌
活动;更高的替代,导致更强的抗真菌活性.
2007年Elsevier公司有限公司,保留所有权利.
关键词：抗菌活性;抗真菌活性;壳聚糖;酰基硫脲衍生物