杨树溃疡病与树皮酚化物关系的研究

用10余种杨树皮酚类化合物提取液,测定对杨树溃疡病菌的抑制作用,邻苯二酚含量较高的抗菌作用较强。同时用10余种酚化物试剂也验证邻苯二酚的作用最明显。健康植株和抗病品种树皮的邻苯二酚含量比病株和感病品种高。可见邻苯二酚是杨树皮中抑制溃疡病的一种主要化合物。     

The Effect of Vineyard Cover Crop on Main Monomeric Phenols of Grape Berry and Wine in Vitis viniferal L. cv. Cabernet Sauvignon

This study was conducted to determine the effect of cover crop inter-row in vineyard on main mono-phenol content of grape berry and wine. Three such cover crops, two perennial legumes （white clover and alfalfa） and a perennial gramineous grass （tall fescue） were sown in vineyard. The main phenolic compounds of mature grape berry and wines vinified under the same conditions were extracted with ethyl acetate and diethyl ether and analyzed by high- performance liquid chromatography （HPLC） by comparing to soil tillage. A total of ten phenolic compounds were identified and quantified in the different grape berry and wines, including nonflavonoids （hydroxybenzoic and hydroxycinnamic acids） and flavonoids （flavanols and flavonols）. The concentration of flavonoid compounds （409.43 to 538.63 mg kg^-1 and 56.16 to 81.30 mg L^-1） was higher than nonflavonoids （76.91 to 98.85 mg kg^-1 and 30.65 to 41.22 mg L^-1） for Cabernet Sauvignon grape and wine under different treatments, respectively. In the flavonoid phenolics, Catechin was the most abundant in the different grapes and wines, accounting for 74.94 to 79.70% and 48.60 to 50.62% of total nonanthocyanin phenolics quantified, respectively. Compared to soil tillage, the sward treatments showed a higher content of main mono-phenol and total nonanthocyanin phenolics in grapes and wines. There were significant differences between two cover crop treatments （tall fescue and white clover） and soil tillage for the content of benzoic acid, salicylic acid, caffeic acid, catechin, and total phenolics in the grape berry （P 〈 0.05 or P〈0.01）. The wine from tall fescue cover crop had the highest gallic acid, caffeic acid and catechin. Cover crop system increased the total nonanthocyanin phenolics of grapes and wines in order of the four treatments： tall fescue, white clover, alfalfa, and soil tillage （control）. Cover crop in vineyard increased total phenols of grape berry and wine, and thus improved the quality of wine evidently.     

食用浆果有助于降低体重

据国际知名期刊GUT上发表的一篇新的研究发现，食用浆果可能是减肥的秘诀，越桔提取物可以帮助减缓体重增加。加拿大营养和功能食品协会的伊夫·德斯贾丁斯教授是研究浆果对身体健康影响的专家，其研究主要集中于越桔果实中的酚类化合物，该化合物能够改善肠胃中的细菌，增加有益细菌，有一定抗炎性并能预防心脏病。     

环境消毒药——酚类

酚类是一种表面活性物质,可损害菌体细胞膜,较高浓度时也是蛋白变性剂,故有杀菌作用.此外,酚类还通过抑制细菌脱氢酶和氧化酶等活性,而产生抑菌作用.     

尾叶桉KP法制浆黑液中小分子酚类化合物的分离与GC-MS分析

用单一pH值萃取法、有机溶剂-无机溶剂交替萃取法和不同pH值分级萃取法从尾叶桉KP法制浆黑液中分离得到18种小分子酚类化合物.采用不同pH值分级萃取法,即分别在pH值为12、7和2时分级萃取,可获得相对量为2379.7mg/L的小分子酚类化合物.此方法避免了单一pH值萃取法所造成的较为严重的共沉现象,也减少了有机溶剂-无机溶剂交替萃取法复杂的分离手段所产生的小分子酚类化合物的损失.此外,对于可作为漆酶天然介体的紫丁香醛和乙酰丁香酮以及可用于合成高分子材料、生物杀虫剂和除草剂的愈创木酚和紫丁香酚,单一pH值萃取法的共沉率分别达38.65%、43.31%和12.25%、14.81%,而不同pH值分级萃取法几乎没有发生共沉.     

酚类化合物的保护作用与裸大麦的抗寒性

研究没食子酸、间苯三酚、对苯二酚、苯酚和香草醛等５种酚类化合物对苗期遭受低温胁迫的裸大麦生理特性的影响。结果表明，酚类化合物可增加低温下叶片ＧＳＨ和ＡＳＡ含量，维持叶片较高的ＳＯＤ和ＣＡＴ活性，降低叶片细胞的膜脂过氧化水平和质膜秀性，提高可溶性蛋白质、热稳定性蛋白质和叶绿素含量，提高叶片的净光合速率，从而维持了膜结构与功能的稳定性，提高了裸大麦的抗寒性。在５种酚类化合物中，以间苯三酚对大多数生理特     

酚类化合物对大豆的生理调节作用和增产效应

大豆苗期喷施酚类化合物ＳＡ、Ｒｅｓ和ＴＡ，对叶片生理特性，植株生长及开花结实有明显的调节作用，处理后，叶片的ＳＯＤ、ＣＡＴ活性提高，ＭＤＡ含量减少，ＮＲ活性增强，蛋白质、脯氨酸和叶绿素含量增加，光合速率提高，主茎生长加快，开花期提前，单株开花数和结荚数、每荚粒数、百粒重和产量提高，在三种酚类化合物中，以Ｒｅｓ对大多数生理特性和产量的调节作用最大。     

几种酚类化合物农药原料的市场与技术发展

<正>一、邻甲酚和二甲酚邻甲酚主要用于合成农药和医药的基本原料,早期从煤焦油及石油裂解产物中分离,后开发的合成方法有邻甲苯胺重氮化水解法、邻氯甲苯碱解法、苯酚与甲醇催化甲基化