Abstract:研究了用酒精滤液代替原来的工艺用水进行细菌酒精连续发酵试验的可行性;建立了单级无回流连续发酵系统,在稀释率为0.35h-1时,酒精产量为64.0g/L,发酵强度达到22.4g/(L·h);考察了回流比分别为0.5,1.0,稀释率为0.3,0.35,0.4h-1时,滤液回流对连续发酵系统的影响.结果表明:进行一定时间的酒糟滤液全回流的连续回流发酵是可行的,但最大稀释率不宜大于0.35h-1,此时连续发酵的生产强度为22.1g/(L·h),酒精产量为63.1g/L.

Abstract:羟乙基纤维素接枝聚丙烯酸共聚物(HEC g PAA)在选择性溶剂中进行自组装,制备了具有良好分散稳定性的纳米颗粒,用动态激光光散射和透射电子显微镜对纳米颗粒大小分布和形态进行了表征.以生物可降解的HEC g PAA接枝共聚物负载模型药物布洛芬(Ibuprofen),制备载药纳米颗粒(Ib HEC g PAA).在37℃于不同pH的缓冲溶液中进行了体外释放研究.药物释放速率的测定结果表明,以HEC g PAA作为布洛芬的载体,可以在选择性条件下实现药物可控释放的目的.

Abstract:对Monacusspp.3的固体发酵生产MonacolinK的培养条件和培养基进行了优化.考察了物料厚度、起始含水量、发酵时间、起始pH值等发酵条件,以及大米培养基中添加附加碳源、氮源、磷酸盐等的影响.结果表明,固体发酵的培养条件为:物料(大米)厚度在4cm以下,起始pH值自然,培养温度32℃,相对湿度60%～70%,发酵时间为12d;经单因素和正交试验得适宜的发酵培养基为:大米100g,甘油0.2g,玉米浆0.15g,起始含水量50%.且以此优化条件固体发酵培养,MonacolinK产量稳定在1.4mg/g左右,最高产量为1.6mg/g.

Abstract:采用柠檬酸结合抗坏血酸对贮藏期间香菇进行保鲜研究,结果表明,柠檬酸结合抗坏血酸处理香菇,可有效抑制香菇呼吸强度的升高,抑制香菇失重率的增加,降低采后香菇细胞膜透性,减少香菇贮藏期抗坏血酸的损失;在4℃下采用0.05g/dLVC+0.10g/dL柠檬酸处理,可以较好地保鲜香菇,使香菇在10d内保持较好的品质.酸处理对香菇两种装载量包装薄膜袋中氧气和二氧化碳体积分数有一定的影响,装载量小的薄膜袋内,可以保持合适的氧气和二氧化碳体积分数,而装载量大的薄膜袋包装则相反.装载量小的薄膜袋包装更有利于香菇的保鲜.

Abstract:通过聚丙烯酰胺凝胶电泳、红外、紫外扫描、气相色谱、氨基酸组成、β 消去反应等方法研究松口蘑菌丝体糖蛋白MP的结构性质,结果表明,该糖蛋白的相对分子质量为57000,红外扫描有典型的多糖吸收峰,糖苷键为α型;单糖组成为葡萄糖和木糖,摩尔比(r)为34∶1,紫外扫描有蛋白质吸收峰,蛋白质量分数为75.5%,多糖为24.5%,多糖与蛋白质为O 糖肽键连接.

Abstract:In this study, it was found that the substitution degree Octenylsuccinate HI-CAP100, CAPSUL and N-LOK were 0.104, 0.063 and 0.059 respectively. Generally, the higher the substitution degree, the lower the viscosity and the higher the emulsifying capa

Abstract:The expression profiles a line G71 susceptible to isolate 92-183in response to Benzothiadiazole(BTH) were investigated using mRNA differentially display (DD). The leaves were sprayed with BTH for 3 daysat 4-leaf stage.A total of 11 differentially expresse

Abstract:研究了亚麻籽胶的静态流变性质和动态流变性质.静态流变性质的研究表明:亚麻籽胶溶液是剪切变稀的假塑性流体,其表观粘度随质量分数的增加逐渐增加;温度对亚麻籽胶溶液的表观粘度的影响符合Arrhenius模型,活化能为27.48kJ/mol;pH值对亚麻籽胶溶液的表观粘度影响很大;盐的加入导致亚麻籽胶溶液的粘度降低.动态流变性质的研究表明,亚麻籽胶溶液显示弱凝胶的特性.

Abstract:The components of bamboo vinegar produced in JianOu, Fujian, were analyzed with GC-MS. From bamboo vinegar 46 kinds of organic compounds has been seperated and identified. The result showed that the major 18 components of bamboo vinegar occupied 98.38% of

Abstract:研究了不同预处理条件及油炸温度、真空度、时间对胡萝卜脆片品质的影响.通过响应面分析可知:油炸温度、真空度及油炸时间显著地影响胡萝卜脆片中水分与脂肪质量分数、脆度,其最佳油炸工艺条件为温度100～110℃,真空度0.08～0.09MPa,时间15min.

Abstract:实验设计了能够模拟低温高湿环境的无水喷雾保活装置,探索了温度、相对湿度、工艺流程等因素对河鳗存活率及存活时间的影响。结果表明,在气温3～5℃,湿度90%以上的环境中,河鳗生存150h后,存活率在85%以上.

Abstract:The procedure for determination of hemagglutination activity(HA) of wheat germ agglutinin(WGA) was improved. Major improvements include: 1). the self sedimentation of erythrocytes was deducted in the definition and calculation of HA; 2). erythrocytes were

Abstract:In this article, Xanthomonas campestris was used to study the two-step fermentation kinetics of xanthan gum in 50 liters airlift fermentor. The fermentation kinetic models were built on the basis of logistic and Luedeking-Piret equations. The kinetic

Abstract:为了探索钙添加剂的超微粉碎加工工艺及粉体性质,将牡蛎壳清洗、干燥、初步粉碎后进行超微粉碎.确定牡蛎壳超微粉碎的最佳工艺参数为:进料速度0.0625g/s,气流压力:进料压力、粉碎压力为0.56MPa,进料粒度150μm,粉碎一次.由超微粉碎得到的粉体,更易溶解于水,而且在水中的分散速度更快.

Abstract:In this paper, solubility and supersolubility curves of glutamic acid solution were measured and modeled by mathematical expression. The metastable zone widths of glutamic acid solution at different cooling rate and agitating rate were also measured. The

Abstract:研究了不同的单一和复合涂膜液对预处理后香菇的感官品质以及呼吸强度、VC含量等生理生化指标的影响.结果表明,配方为2.5g/L聚乙烯醇、5g/L海藻酸钠、0.4g/L山梨醇、0.8g/L山梨酸钾的复合涂膜液保鲜效果较好,有效地抑制了香菇的呼吸作用,减少了营养成分的损失,在常温(25℃)下可将香菇保鲜7～8d.

Abstract:Nine strains of enteric bacteria,capable of converting glycerol to 1,3-PD were screened. All of the strains were identified as Klebsiella pneumoniae. After chemical mutation, the prodution of 1,3-PD was improved. After beering optimized the fermentation t

Abstract:The model of spermatogenesis obstructive rat was built with gossypol acetate. Then Liuwei Dihuang decoction and methyltestosterone were administered to the Wistar rats. The numbers of sperm were counted, the quality of sperm was observed, and the sperm

Abstract:研究了50℃时木糖和木糖醇共存体系在离子交换树脂上竞争吸附的等温吸附和动力学吸附行为,得出两者等温吸附均为优惠吸附,给出了两者的Langmuir等温吸附方程;研究两者不同质量浓度混合样品的动力学吸附过程,得出两者的动力学吸附速率方程.结果验证了离子交换色谱法分离木糖醇结晶母液中木糖与木糖醇的相互分离行为,为木糖醇吸附分离工程设计提供一定的理论依据.

Abstract:In this paper, the effects of additions of glucose, saccharose and soluble starch to the solutions of the soybean protein isolate(SPI), succinylated SPI, papain modified SPI, and the pH of the solutions on the emulsions formed were studied. Through t

Abstract:用Alcalase水解酪蛋白,用TNBS法监测酪蛋白的水解度(DH),运用纳滤技术改善产品质量;同时还研究了不同rN/rP(摩尔比)的CPP(酪蛋白磷酸肽)结合钙离子和亚铁离子的能力.结果表明,用Alcalase酶可以使酪蛋白的水解度(DH)达到16%～20%,TNBS法可以明显减少碱的引入,从而降低CPP产品的灰分含量.截留相对分子质量为150的纳滤膜可以适当的降低CPP产品的rN/rP,改善产品质量,而且能达到80%的总氮回收率;在DH为20%左右,rP基本上没有损失.该工艺适合于工业化生产较高rN/rP的CPP产品.rN/rP较低的CPP结合钙的能力好于rN/rP较高的CPP产品;CPP也可以抑制亚铁离子的沉淀.

Abstract:以鹅血为原料,利用醋酸纤维膜电泳,分析鹅血中各球蛋白的质量浓度.采用DEAE 52离子交换和SephdexG 100凝胶层析等方法,对转铁蛋白(Transferrin,Tf)进行了分离纯化及其性质的研究.结果表明,鹅血浆中含有较多的β球蛋白,质量浓度为34.89mg/dL,每毫升血浆可纯化得到3.1mg转铁蛋白.鹅血含铁转铁蛋白(holo Tf)的特征吸收峰为470nm,相对分子质量为77000.鹅转铁蛋白对选用的革兰氏阴性菌 大肠杆菌有抑制作用,Fe3+能够改变转铁蛋白的结构,并影响转铁蛋白的抑菌功能.

Abstract:The different synthetic routes of biosurfactants by ectogenous enzymatic catalysis and metabolism of whole-cell microorganism and traditional organic synthesis were compared with one another. Some advantages of the enzymatic synthesis of biosurfactan

Abstract:纵观水产行业标准在2001年和2002年内新颁布的8项配合饲料标准,分析了其中加工质量指标及检测方法,讨论了原料粉碎粒度检测的严密性、混合均匀度测定方法的可行性、含粉率与粉化率的检测意义及影响耐水性检测结果的诸因素,建议各标准应相互统一、增强标准的严密性和建立符合水产饲料特点的检测方法.