复方磷霉素钙水溶性粉处方优化实验     

王春华  毕聪明  王坤 《中国兽药杂志》2005,39(7):34-37

为了优选磷霉素钙复方制剂,采用体外药物最小抑菌浓度测定法,测定了磷霉素钙与甲氧啶(TMP)、丁胺卡那霉素、恩诺沙星、庆大霉素、头孢噻肟钠、多西环素、氟甲砜霉素联合使用对大肠杆菌作用的协同指数.结果表明磷霉素钙与TMP的协同关系最好,协同指数为0.281,制剂中磷霉素钙与TMP的含量分别为5%和1%为最佳.  相似文献   

稻瘟菌不同小种间可溶性蛋白及酯酶同工酶的多态性     

朱培良  沈瑛  袁筱萍  赵新华;金敏忠  柴荣耀 《植物保护》1995,21(6):15-16

采用聚丙烯酰胺凝胶泳对来自太湖稻区的１０个水稻稻瘟病菌株和２个禾本科杂草瘟菌的可溶性蛋白及酯酶同工酶进行了分析比较。结果表明：供试菌株菌体可溶性蛋白可呈现１６～２５条电泳谱带，其中在Ｒｆ值为０．２３，０．３３，０．４４的３条谱带为１２２个菌株所共有，没有发现生理小种特异性谱带。对１２个菌株α－酯酶同工酶的分析表明，在所有菌株同工酶谱带中可分辩出具有不同迁移率的１２条谱带，据此可将菌株分为８个不同的同工酶谱带类型。同时表明，α－酯酶同工酶在太湖稻区稻瘟病菌中存在丰富的多态性，但其谱带类型与病菌生理小种无相关性。  相似文献   

喷雾干燥鱼浆蛋白粉营养成分分析     

陈宜芳  何瑞国  任泽林  程一兵 《中国饲料》2007,(6):32-33

本试验对鱼粉加工废水鱼浆蛋白粉(经浓缩、水解、喷雾干燥得到的副产品)进行营养成分分析,其中粗蛋白质含量达64.08%,钙2.67%、磷1.12%,钙磷比例合理;各氨基酸含量分别为:赖氨酸3.29%,蛋氨酸0.94%,谷氨酸5.17%,牛磺酸2.50%。  相似文献   

甜瓜可溶性固形物含量的遗传表现与基因效应分析   总被引：2，自引：0，他引：2  

林碧英  高山  林峰 《中国瓜菜》2007,(1):4-6

通过半轮配双列杂交,分析了甜瓜可溶性固形物含量的遗传特性。研究结果表明,遗传方差组成中,基因的加性效应和显性效应都是显著的,但加性效应占相对主要优势,狭义遗传力(h2N)值为65%。基因的分布是不均衡的,控制该性状的基因W为显性基因,但表现为不完全显性,可溶性固形物含量选择的较好世代在F4代。  相似文献   

Pineapple organic acid metabolism and accumulation during fruit development     

Parson Saradhuldhat  Robert E. Paull 《Scientia Horticulturae》2007

Developmental changes in pineapple (Ananas Comosus (L.) Merrill) fruit acidity was determined for a ‘Smooth Cayenne’ high acid clone PRI#36-21 and a low acid clone PRI#63-555. The high acid clone gradually increased in fruit acidity from 1.4 meq/100 ml 6 weeks from flowering, and peaked a week before harvest at ca 10 meq/100 ml. In contrast, the low acid clone increased in acidity 6 to 8 weeks after flowering, peaked 15 weeks after flowering at ca. 9 meq per/100 ml and then sharply declined in 2 weeks to 6 meq/100 ml. The increased in total soluble solids (TSS) of the low acid clone began 6 weeks after flowering and for the high acid clone at 12 weeks after flowering. The increase in titratable fruit acidity (TA) paralleled the changes in the citric acid content of both clones. Citric acid content increased from less than 1 mg/g at 6 weeks after flowering to 6 to 7 mg/g, 9 weeks later. The malic acid concentration in both clones varied between 3 and 5 mg/g and showed no marked changes just before harvest. The developmental changes in fruit potassium were significantly correlated with fruit acidity and fruit total soluble solids in both the high and low acid clones. Developmental changes in acid-related enzymatic activities showed an increase in citrate synthase (EC 4.1.3.7) activity that occurred a week before harvest, coincided with the peak in citric acid in the high acid clone. An increase in aconitase (ACO, EC 4.2.1.3) activity was observed just before harvest as the decline in acidity occurred in the low acid clone. The activities of phosphoenolpyruvate carboxylase (PEPC, EC 4.1.1.31), malate dehydrogenase (MDH, EC 1.1.1.37) and malic enzyme (ME, EC 1.1.1.40) did not parallel any changes in fruit acidity. The results indicated that the change in pineapple fruit acidity during development was due to changes in citric acid content. The major difference in acid accumulation occurred in the low acid clone just before harvest when acidity declined by one-third. The activities of citrate synthase and aconitase possibly played a major role in pineapple fruit acidity changes.  相似文献   

Controllability of Phosphorus Losses in Surface Runoff from Sloping Farmland Treated by Agricultural Practices     

《Land Degradation \u0026amp; Development》2017,28(5):1704-1716

Phosphorus (P) loss from arable sloping land due to water erosion causes off‐site environment pollution in the Three Gorges area in China. This study aims to estimate the effects of agricultural practices on the reduction of P losses during water erosion processes under natural precipitation conditions: contour culturing with organic matter addition (CT + OM), contour culturing with wheat straw mulching (CT + SM), contour culturing with straw mulching and organic matter addition (CT + OM + SM) and conventional downslope culturing framework as a control (CK). Results demonstrated that CT + OM + SM could viably diminish runoff, sediment yields and P losses from arable sloping land. Compared with CK, CT + OM, CT + SM and CT + OM + SM lessened the surface runoff depths by 19%, 34% and 50%, respectively. A high curve number value induced a notable runoff potential from the plot. The surface‐runoff‐related total P (TP) loads for CK with yearly measures of 1·56 kg ha⁻¹ were significantly higher than those for CT + OM, CT + SM and CT + OM + SM at 1·07, 0·77 and 0·51 kg ha⁻¹ (p  < 0·05), respectively. With all things considered, the particulate P losses represented a significant division of TP losses, adding up to almost 80% in 2014 and 79% in 2015. The outcomes demonstrated that surface protection and organic matter addition are two of the greatest agricultural protection practices that lessen P losses in the surface runoff from sloping farmland by water erosion. Copyright © 2017 John Wiley & Sons, Ltd.  相似文献   

Rootstock influence on ‘delicious’ and ‘golden delicious’ apple fruit quality at harvest and after storage     

Fenton E. Larsen  Robert Fritts  Kenneth L. Olsen 《Scientia Horticulturae》1985,26(4):339-349

The influence of 9 rootstocks (M2, M7, M25, M26, MM104, MM106, MM109, MM111 and seedling) on fruit quality at harvest and after storage of ‘Wellspur Delicious’ (WS) and ‘Goldspur’ (GS), and of 3 rootstocks (M7, M26 and MM106) on fruit quality of ‘Red King Delicious’ (RK) and ‘Golden Delicious’ (GD) apple (Malus domestica Borkh.) was evaluated during a 4-year period. Fruits from trees on M26 were larger, developed earlier color and soluble solids (SS), and maintained higher levels of acidity (at harvest and during storage) in comparison with other rootstocks. Fruit from trees on M2 tended to have high SS. Fruit color from trees on MM104, MM106 and MM109 tended to be comparatively poor. There were significant rootstock effects on SS, starch, acidity, color, circumference, weight and box size.  相似文献   

连花柴芩可溶性粉对鸡风热犯肺证的临床试验研究     

王学方  归荣  陈功义  王伟  张红英  王学兵  李晓 《中国畜牧兽医》2022,49(9):3610-3621

【目的】 研究连花柴芩可溶性粉对风热犯肺所导致的鸡发热、咳嗽、食欲减退、口渴喜饮等证候的临床疗效。【方法】 采用鸡传染性支气管炎病毒人工攻毒建立风热犯肺证肉鸡病例模型,将出现典型风热犯肺证临床症状的150只鸡纳入到试验中,并随机分为5组,30只/组,分别为连花柴芩可溶性粉高、中、低剂量组（连花柴芩可溶性粉浓度分别为4、2、1 g/L）,麻杏石甘颗粒药物对照组（1 g/L）,模型对照组,另设30只为健康对照组。除健康对照组和模型对照组外,各试验组连续饮水给药5 d,记录给药前后鸡的精神状态、体温、呼吸道症状、采食及饮水的变化,并检测各组鸡的免疫器官指数、外周血免疫细胞亚群指标,综合考察连花柴芩可溶性粉的临床疗效。【结果】 连花柴芩可溶性粉高、中剂量组对风热犯肺所致的鸡发热、咳嗽的总有效率分别为90.00%和86.66%,显著高于模型对照组（P<0.05）,且对病鸡采食量下降、饮水量增多具有较好的缓解效果（P<0.05）;连花柴芩可溶性粉能提高病鸡免疫器官指数,促进病鸡外周血中CD3⁺、CD4⁺、CD8⁺ T淋巴细胞增殖,且连花柴芩可溶性粉高、中剂量显著高于模型对照组（P<0.05）。【结论】 连花柴芩可溶性粉对风热犯肺所致的鸡发热、咳嗽、食欲减退、口渴喜饮具有较好的缓解和治疗效果,结合药物量效关系和经济成本等因素综合考虑,推荐连花柴芩可溶性粉临床应用剂量为2 g/L,饮水给药,连用5 d。  相似文献   

低温驯化的黑荆树悬浮培养细胞中可溶性蛋白质含量变化^*   总被引：4，自引：0，他引：4       下载免费PDF全文

王敬文  蒋晶 《林业科学研究》1993,6(6):661-665

低温驯化能够诱导黑荆树悬浮培养细胞增强抗冻性，ＬＴ５０从－４．３℃下降到－８．２℃。低温驯化诱可溶性蛋白质含量增加，其增加的时间进程与细胞抗冻性发育呈平行关系。环已亚胺抑制可溶性蛋白质含量增加，同时也抑制细胞抗冻性发育。在低温驯化期不同时间加入环已亚胺抑制抗冻性发育，表明低温驯化１０ｄ后抗浆性发育接近完成。糖对增加驯化细胞中可溶性蛋白质有促进作用，加快增加含量的时间进程，但对最终提高蛋白质含量水平  相似文献   

在低温锻炼中毛白杨幼苗可溶性总蛋白、RNA、DNA、RNase及抗冻性的变化   总被引：4，自引：0，他引：4  

林善枝  张志毅 《中国林学(英文版)》2002,4(2):9-15

低温锻炼不仅提高了毛白杨幼苗存活率和抗冻性以及RNA和可溶性总蛋白的含量 ,降低了RNase活性 ,而且能减轻低温胁迫引起的RNA和可溶性总蛋白含量的下降程度和RNase活性的提高 ,有利于幼苗在恢复过程中RNA和可溶性总蛋白水平的迅速回升以及RNase活性的降低 .进一步研究发现 ,DNA含量无论在低温锻炼中还是在低温胁迫下或是在随后的恢复生长期均保持相对稳定 ;低温锻炼所引起的RNA含量的增加 ,与RNase活性的降低呈明显的负相关 ,与可溶性总蛋白含量的增加以及幼苗抗冻性的提高成正相关 .这表明低温锻炼可能抑制RNase活性 ,有效地促进RNA含量的增加 ,而RNA可能参与了可溶性总蛋白的合成及抗冻性的诱导  相似文献