Suppression of Botrytis cinerea on necrotic grapevine tissues by early‐season applications of natural products and biological control agents     

Carlos Calvo‐Garrido  Inmaculada Viñas  Philip AG Elmer  Josep Usall  Neus Teixidó 《Pest management science》2014,70(4):595-602

  相似文献   

壳聚糖-高岭土复合体去除铜绿微囊藻的试验研究     

石静  ;刘春光  ;王君丽  ;金星龙  ;赵乐军  ;袁有才  ;庄源益 《农业环境保护》2009,(9):1914-1918

利用室内模拟试验,研究了壳聚糖和高岭土单独及复合作用对铜绿微囊藻的去除效果。以250mL烧杯作为试验容器,纯种藻为试验用藻,以叶绿素a和浊度表征藻液浓度的变化。结果表明,单独使用高岭土除藻效率较低,增加高岭土用量难以提高藻的去除率;单独使用壳聚糖对藻的去除效果较好,但是藻的絮凝沉降速度较慢。壳聚糖-高岭土复合体可以明显加快藻类的沉降速率,改善除藻效果。  相似文献   

壳聚糖对芒果离体叶片渗透胁迫的缓解效应   总被引：4，自引：0，他引：4  

刘晚苟  黄小明  杨秀坚 《干旱地区农业研究》2004,22(4):195-197

研究不同浓度壳聚糖溶液对芒果(Mangiferaindica)离体叶片在20%聚乙二醇(PEG-6000)渗透胁迫条件下生理生化的影响,结果表明,渗透胁迫下,壳聚糖可减缓叶片中水分的丧失以及叶绿素含量的下降,并能提高过氧化物酶活性和增加脯氨酸含量。因此,壳聚糖可有效缓解渗透胁迫对植物的损伤,提高植物的抗旱性。  相似文献   

NaCl plus chitosan as a dietary salt to prevent the development of hypertension in spontaneously hypertensive rats     

Sung-Hoon Park  Noton Kumar Dutta  Min-Won Baek  Dong-Jae Kim  Yi-Rang Na  Seung-Hyeok Seok  Byoung-Hee Lee  Ji-Eun Cho  Geon-Sik Cho  Jae-Hak Park 《Journal of veterinary science (Suw?n-si, Korea)》2009,10(2):141-146

The effect of NaCl plus 3% chitosan on the systolic blood pressure of spontaneously hypertensive rats (SHR) were evaluated and compared with NaCl plus KCl (NaCl, 49.36% + KCl 49.36%) and chitosan or NaCl treatment alone. In SHR, administration of NaCl plus chitosan (44 mM Na/day) for two months significantly decreased the systolic blood pressure greater than of NaCl plus KCl and NaCl alone. NaCl plus chitosan resulted, though not statistically significant, in decreased urinary Na⁺ excretion and decreased blood urea nitrogen levels. Urinary creatinine of NaCl plus chitosan was slightly decreased compared to 3 treated groups. Serum electrolytes levels, however, remained unchanged. The combination of NaCl and chitosan may be superior to the conventional use of NaCl plus KCl or NaCl alone in the prevention of hypertension. Even though these supplementary diets have demonstrated potential anti-hypertensive effects in the experimental animal model, further research is needed before any recommendations can be made.  相似文献   

壳聚糖对丰都红心柚保鲜效果的影响   总被引：1，自引：0，他引：1  

傅德明  程昌凤  余宏斌  付琼玲  周达伟 《保鲜与加工》2006,6(4):11-12

采用H202氧化降解法制备相对分子质量(Mw)为1 500～2000的低分子质量壳聚糖.先用有益微生物制剂100液浸果2 min,再用浓度为1.5%的低分子质量壳聚糖涂膜保鲜丰都红心柚.试验结果表明,在常温和普通民房贮藏条件下贮藏100天,其烂果率为9.2%、干疤率为10.3%,防腐保鲜效果优于化学防腐保鲜剂.  相似文献   

魔芋葡苷聚糖/壳聚糖共混胶黏剂应用于胶合板的研究   总被引：2，自引：0，他引：2  

王英  郭康权  李家宁  段新芳  李艳杰 《木材工业》2009,23(2)

以胶合强度为考察指标,进行魔芋葡苷聚糖/壳聚糖共混配比胶黏剂工艺的制备研究.试验结果表明,胶黏剂中各组分用量的较佳参数为:壳聚糖1%,魔芋葡苷聚糖1.5%,NaOH为1%.此配比制备的胶黏剂压制的胶合板,干状胶合强度最大;在壳聚糖1%,魔芋葡苷聚糖1.5%,NaOH为2%的配比时,胶合板的湿状胶合强度最大.  相似文献   

不同分子量壳聚糖对白鲢鱼丸货架期品质的影响   总被引：1，自引：0，他引：1  

吴涛  冯武  茅林春 《湖北农业科学》2009,48(11)

将壳聚糖应用于白鲢鱼糜制品的保鲜,通过时白鲢鱼丸货架期的pH值、挥发性盐基总氮、TBA值、过氧化值以及菌落总数的测定,研究了壳聚糖对鱼丸货架期品质的影响.鱼丸中添加1%的壳聚糖成分即可有效抑制其脂质氧化与微生物的生长.壳聚糖对鱼丸的保鲜功能取决于其分子量大小,与高分子量的壳聚糖相比,低分子量的壳聚糖具有更强的抗氧化能力,且30万分子量与1万分子量壳聚糖的混合物具有更强的抗菌能力.  相似文献   

壳聚糖和大蒜素复合涂膜对葡萄的保鲜效果   总被引：3，自引：0，他引：3  

任艳芳  王思梦  何俊瑜  方林川 《贵州农业科学》2009,37(12)

以黑提葡萄为材料,研究壳聚糖单一涂膜与壳聚糖和大蒜素复合涂膜对黑提葡萄保鲜效果的影响,结果表明,2种涂膜处理均可以有效抑制葡萄的呼吸强度,降低失重率和MDA的积累量,延缓SSC和TA的降解,提高好果率和果实耐压力,维持高活性的SOD,相比之下,大蒜素与壳聚糖复配的可食性膜的保鲜效果明显好于单一壳聚糖处理.  相似文献   

壳聚糖的抗菌性及其对果实病害的防治研究进展   总被引：6，自引：0，他引：6  

杨玲玉  孟祥红  刘成圣  田世平 《中国农业科学》2009,42(2):626-635

 对壳聚糖的抑菌性及其在果实保鲜中的应用技术进行分析和综述。壳聚糖具有广谱的抑菌性,能够抑制真菌孢子产生、萌发、芽管伸长和菌丝生长,其抑制效果与壳聚糖的分子量、脱乙酰度、基团修饰等分子特征直接相关并受溶液浓度、pH和溶剂类型的影响,其抑菌机理与其对细胞的直接损伤或作为信号物质直接或间接干扰细胞代谢过程相关。壳聚糖对多种果实采后病害具有防治效果,通过直接抑制病原菌的生长、提高果实抗性和延缓果实衰老等途径发挥作用。外源物质配合或采前采后应用技术的综合使用能提高壳聚糖对病害防治的效果。本文还对壳聚糖在该领域的应用前景和未来研究的重点进行了探讨。  相似文献   

Oxidative Stability of Spray-Dried Microencapsulated Fish Oils with Different Wall Materials     

Parastoo Pourashouri  Bahareh Shabanpour  Seyed Hadi Razavi  Seid Mahdi Jafari  Ali Shabani  Santiago P. Aubourg 《Journal Of Aquatic Food Product Technology》2013,22(6):567-578

Multilayer microencapsulation of fish oil was evaluated by using fish gelatin (treated with or without microbial transglutaminase [MTGase]), chitosan, and maltodextrin for its ability to control lipid oxidation. This study showed that a mixture containing gelatin and maltodextrin obtained the highest percentage of core release. The oxidative stability of the formulated mixtures and the bulk oils was investigated during a period of 60 days. The peroxide value (PV) was assessed as a parameter for primary oxidation products, and p-anisidine (p-AV) and thiobarbituric acid reactive sub-stances (TBARS) was used to analyze secondary oxidation compounds. Observation of oxidation products showed that combinations of gelatin and maltodextrin made by adding MTGase and a mixture of gelatin and chitosan were able to increase the oxidative stability, and increases in PV and p-AV and TBARS were found for all oils.  相似文献