Rapeseed Meal and egg taint     

A. Hobson‐Frohock  R. G. Fenwick  D. G. Land  R. F. Curtis  A. L. Gulliver 《British poultry science》1975,16(2):219-222

1. Certain rapeseed meals in the diet of hens laying brown eggs result in the production, from some birds, of eggs which have a “ fishy ” or “ crabby ” odour because of the presence of trimethylamine.

2. Such susceptible birds have been used to demonstrate that the activity can be extracted from rapeseed meal with appropriate solvents.  相似文献   

The role of histamine and fish meal in the incidence of gizzard erosion and pro‐ventricular abnormalities in the fowl     

E. G. Harry  J. F. Tucker  A. P. Laursen‐Jones 《British poultry science》1975,16(1):69-78

1. The role of certain fish meals in the production of localised gizzard erosion is confirmed.

2. Lesions typical of gizzard erosion could be produced by the addition of histamine to the diet.

3. The amount of histamine occurring naturally in fish meal depends on the species of fish and the extent and nature of bacterial spoilage.

4. These variables may explain why histamine has not been implicated previously and also why there have not been consistent associations between the condition and geographical source or common factors in bulk consignments of the meal.  相似文献   

以电导法配合Log istic方程确定茶梅‘小玫瑰’的抗寒性   总被引：31，自引：4，他引：31  

徐康  夏宜平  徐碧玉  林田  杨霞 《园艺学报》2005,32(1):148-153

 摘　要: 以不同处理时间、不同低温处理下茶梅‘小玫瑰’叶片的电解质外渗率(REC) 变化作曲线,并结合Logistic方程分别计算茶梅的半致死温度(LT50 ) , 结果发现在低温处理6 h以上, 茶梅叶片的REC均随着处理温度的降低而呈“S”形上升, 由此计算出“S”形拐点对应的温度即为茶梅叶片的LT50 , 其温度值在- 1215℃至- 14℃之间, 这可认为是茶梅抗寒能力的重要指标。关键词:  相似文献   

杨桃果实生长发育过程中营养品质的变化   总被引：8，自引：0，他引：8  

胡志群  周碧燕  陈杰忠  林小冰  蓝永辉 《园艺学报》2005,32(5):782-782

杨桃（Averrhoa arambola L．）为华南地区重要的热带水果。本试材为华南农业大学园艺分场种植的3年生盆栽马来西亚甜杨桃，砧木为酸杨桃。在杨桃的开花期，选择生长势、开花数量和时间较一致45株为试材，再选择受精时间一致的果实做标记。采样时问从开花后（2003年7月15日）至杨桃充分成熟（2003年10月25）。测定杨桃果实中的糖（蒽酮比色法）、有机酸（HPLC法）、维生素C（2，6-二氯靛酚钠滴定法）和单宁（高锰酸钾滴定法）的含量。  相似文献   

黑穗醋栗新品种‘甜蜜’     

刘海广  李亚东  吴林  张志东  刘洪章  宫国辉 《园艺学报》2005,32(6):1161-1161

 ‘甜蜜’是从波兰引进的黑穗醋栗试材中筛选出来的晚熟品种, 生长势强, 果穗长, 单果质量1.47 g, 可溶性固形物14% , 维生素C 1.6 g/kg FM。果实出汁率70%。风味酸甜, 鲜食口味佳。丰产性好。在长春地区7月中下旬成熟。  相似文献   

橄榄树冠分枝级数与产量及结果习性关系的研究     

连依龙 《中国南方果树》2005,34(5):35-36

橄榄是常绿乔木果树，福建特产名果之一，果实鲜食、加工皆宜。上世纪80年代以来橄榄栽培在福建主产区闽江下游及莆田、闽南一带迅速发展。长期以来，人们对橄榄结果习性、产量与分枝级数的关系只凭经验估计，没有进行详细观察。为此，我们进行了本项调查研究，以期为橄榄修剪及早结、丰产、稳产栽培措施提供依据。  相似文献   

嫁接西瓜肥料试验初报     

姚莉英  林天杰  邵彬 《中国瓜菜》2005,(1):13-14

试验结果表明,在土壤有机质含量高达4.07%的单栋钢管大棚中,进行嫁接西瓜栽培时,与常规施肥量相比,在4个减肥处理中,以减量20%的处理增产优质效果最佳。  相似文献   

枇杷瘤蛾土壤施药防治试验     

连依龙 《中国果树》2005,(4):34-36

枇杷是我国南方重要水果之一,其主要害虫枇杷瘤蛾在全国各产区均不同程度地发生,有些果园还常常引起严重灾害.以往均采用叶面喷雾方法防治,为寻找防治效果好、残效期长、环境污染轻且能保护天敌的用药方法,我们于2004年进行土壤埋施内吸性杀虫剂防治枇杷瘤蛾的试验.  相似文献   

Culture of Differentiated Adult Rabbit Auricular Chondrocytes     

V. Villar  B. Colao  I. Calles‐Venal  J. G. Fernndez‐lvarez  M. Fernndez‐Caso  J. M. Villar 《Anatomia, histologia, embryologia》2005,34(Z1):54-54

Chondrocytes dedifferentiate to a fibroblast‐like phenotype on plastic surfaces. Dedifferentiation is reversible if these cells are then cultured embedded in gels as alginate, agarose or collagen. Chondrocytes cultured in suspension on a non‐adherent surface are also known to form aggregates of differentiated cells. The knowledge of chondrocyte behavior in culture is relevant for tissue engineering purposes. In this report we describe a simple method to culture differentiated or redifferentiated rabbit auricular chondrocytes on plastic surfaces with a stable phenotype. When chondrocyte aggregates formed in suspension are next seeded on plastic surfaces, most of them attach to the plastic as round or polygonal cells, and this morphological differentiation, confirmed by the presence of type II collagen, is stable for long culture periods. We also report that the addition of aggregates to monolayer cultures of dedifferentiated chondrocytes results in their redifferentiation, as is shown by their morphological changes and the synthesis of type II collagen. Therefore, this simple method can be useful for the study of chondrocyte behavior on plastic surfaces and for redifferentiating previously proliferated chondrocytes in tissue engineering techniques. Furthermore, these results demonstrate that, in addition to culture conditions such as cell isolation method or cell‐density, chondrocyte behavior on plastic depends on the presence or absence of aggregates resulting from the dissociation process.  相似文献   

镧素对镰刀菌Fusarium solani及其致病酶的影响   总被引：2，自引：0，他引：2  

慕康国  张文吉  胡林  张福锁 《农药学学报》2002,4(4):56-60

采用琼脂平板生长速率法及液体培养基培养测定了La对镰刀菌Fusarium solani的抑制作用和毒力,并测定了其对病菌胞外的果胶酶、蛋白酶和纤维素酶等几种致病酶活性的影响。结果表明,随着La2O3浓度升高,对病菌菌丝生长的抑制作用增强,对病菌的EC50和EC95分别为278.2和552.0 mg/L;在一定浓度范围内,La提高了单位量菌丝所产生3种致病酶的活性,但由于菌丝生长受到抑制,除蛋白酶外,病菌胞外致病酶果胶酶和纤维素酶的总量或总活性受到了抑制,降低了病菌的致病力。  相似文献