Eighty 4-weeks old broiler chicks (Anak 2000 strain) were used in a 28 days feeding trial to determine the effects of replacement of soya bean meal (SBM) by bambara nut sievate (BNS) on the carcass and organ character...Eighty 4-weeks old broiler chicks (Anak 2000 strain) were used in a 28 days feeding trial to determine the effects of replacement of soya bean meal (SBM) by bambara nut sievate (BNS) on the carcass and organ characteristics of fin- isher broiler chicks. BNS replaced soya bean meal by weight for weight at levels 0%, 5%, 10% and 15% for treatments 1,2, 3 and 4;respectively which were replicated four times in a completely randomized design. Feed and potable water were supplied ad libitum to the birds. Also, ap- propriate medication, sanitation and other stan- dard management practices were strictly adopt- ed. At the 28th day, one bird was randomly picked from each replicate, starved of food for 24 hours and then slaughtered and eviscerated for carcass and organ evaluation. Weights were measured with digital weighing scale. Results of analysis of variance of carcass parameters showed significant (P 0.05) in the values above but only varied with birds on 10% and 15% BNS. Other carcass parameters were simi- lar (P > 0.05) in value between treatments. The liver, heart, gizzard and intestine significantly varied (P < 0.05) between their treatments. How- ever, kidney values did not differ significantly. From the results, it appeared that 5% BNS in- clusion is optimal for carcass and organ char- acteristics of finisher broilers.展开更多
为了提高纳豆中的蛋白酶活力,以纳豆芽孢杆菌为菌种,对鹰嘴豆纳豆液态发酵进行优化。以蛋白酶活力为指标,采用Plackett-Bnrmao法筛选出三个对蛋白酶活力影响最大的因素:装液量、转速和鹰嘴豆粉添加量。通过响应面优化鹰嘴豆纳豆液态发...为了提高纳豆中的蛋白酶活力,以纳豆芽孢杆菌为菌种,对鹰嘴豆纳豆液态发酵进行优化。以蛋白酶活力为指标,采用Plackett-Bnrmao法筛选出三个对蛋白酶活力影响最大的因素:装液量、转速和鹰嘴豆粉添加量。通过响应面优化鹰嘴豆纳豆液态发酵的培养基和发酵条件,建立二次回归模型的拟合度良好,对提高蛋白酶活力影响显著(p<0.005),所得最佳培养基为鹰嘴豆粉添加量5.9%,豆粕粉1.0%,葡萄糖0.6%,氯化钠0.5%,最佳发酵条件为:转速250 r/min,装液量76 m L/500 m L,温度37℃,发酵时间48 h。该条件下发酵所得蛋白酶活力达(3558.0±1.5)U/m L,相对于对照培养基的(2491.4±2.8)U/m L提高了42.8%,且纤维蛋白平板法验证的纳豆激酶溶解圈面积提高了108.6%。结果表明,优化后的鹰嘴豆纳豆液态发酵能有效提高蛋白酶活力。展开更多
文摘Eighty 4-weeks old broiler chicks (Anak 2000 strain) were used in a 28 days feeding trial to determine the effects of replacement of soya bean meal (SBM) by bambara nut sievate (BNS) on the carcass and organ characteristics of fin- isher broiler chicks. BNS replaced soya bean meal by weight for weight at levels 0%, 5%, 10% and 15% for treatments 1,2, 3 and 4;respectively which were replicated four times in a completely randomized design. Feed and potable water were supplied ad libitum to the birds. Also, ap- propriate medication, sanitation and other stan- dard management practices were strictly adopt- ed. At the 28th day, one bird was randomly picked from each replicate, starved of food for 24 hours and then slaughtered and eviscerated for carcass and organ evaluation. Weights were measured with digital weighing scale. Results of analysis of variance of carcass parameters showed significant (P 0.05) in the values above but only varied with birds on 10% and 15% BNS. Other carcass parameters were simi- lar (P > 0.05) in value between treatments. The liver, heart, gizzard and intestine significantly varied (P < 0.05) between their treatments. How- ever, kidney values did not differ significantly. From the results, it appeared that 5% BNS in- clusion is optimal for carcass and organ char- acteristics of finisher broilers.
文摘采用氢氧化钠和乙醇改性剂处理豆粕粉(SBM),用硫脲作交联剂,选用十二烷基硫酸钠(SDS)表面活性剂制备出具有较好耐水性能的木材用胶黏剂。研究p H、乙醇、硫脲及SDS用量对杨木胶合板耐水胶合强度的影响,并结合浴比(物料质量比)因素,探讨退粘剂(硫酸)对反应体系黏度和胶合强度的作用机理。借助扫描电子显微镜(SEM)分析手段阐明退粘剂对豆粕粉胶黏剂黏度及耐水性增强效应。结果表明:当p H13、乙醇用量15%、硫脲用量7%及SDS为5%,浴比为1∶3.5(豆粕粉质量为基准)时,耐水胶合强度可达0.98 MPa,当加入0.5%退粘剂后,黏度由84 520 m Pa·s降低至1 239 m Pa·s,胶接强度增加18.07%。SEM结果发现豆粕粉胶黏剂固化断面胶接致密,有效改善了胶液黏度和耐水胶合性能。
文摘为了提高纳豆中的蛋白酶活力,以纳豆芽孢杆菌为菌种,对鹰嘴豆纳豆液态发酵进行优化。以蛋白酶活力为指标,采用Plackett-Bnrmao法筛选出三个对蛋白酶活力影响最大的因素:装液量、转速和鹰嘴豆粉添加量。通过响应面优化鹰嘴豆纳豆液态发酵的培养基和发酵条件,建立二次回归模型的拟合度良好,对提高蛋白酶活力影响显著(p<0.005),所得最佳培养基为鹰嘴豆粉添加量5.9%,豆粕粉1.0%,葡萄糖0.6%,氯化钠0.5%,最佳发酵条件为:转速250 r/min,装液量76 m L/500 m L,温度37℃,发酵时间48 h。该条件下发酵所得蛋白酶活力达(3558.0±1.5)U/m L,相对于对照培养基的(2491.4±2.8)U/m L提高了42.8%,且纤维蛋白平板法验证的纳豆激酶溶解圈面积提高了108.6%。结果表明,优化后的鹰嘴豆纳豆液态发酵能有效提高蛋白酶活力。
