鱼糜漂洗液中水溶性蛋白质的回收与利用

研究了藻胶对链鱼糜漂行销认中水溶性蛋白质的凝聚作用,探讨了所回收的蛋白质返加到鱼糜中加以利用的可能性。结果表明,用褐藻胶作凝聚剂,蛋白质的回收率超过８０％,而废水的ＣＯＤ下降５０％左右;影响回收效果的主要因素有体系的ｐＨ值,蛋白质的浓度和褐藻胶的投加量等。将回收的蛋白质５％的比例添加于鱼糜中,制出的鱼香肠其凝胶强度基本不变。     

动物日粮阴阳离子平衡技术及研究现状

简要综述了日粮阴阳离子平衡技术及其在猪、禽、奶牛、羊方面的研究与应用现状     

盐胁迫水稻愈伤组织的生理生化指标检测

对水稻幼穗外植体诱导产生的愈伤组织进行盐胁迫筛选后,经对连续继代３～４次的愈伤组织生理生化指标检测,结果表明：在一定盐浓度下,水稻愈伤组织会产生积极的防御反应,通过积累脯氨酸、增强酶活性和表达新的同工酶来适应盐胁迫环境。一系列生理生化变化为水稻抗盐愈伤组织筛选提供了参考指标。     

Alkalinity of Pore Fluid of High_addition Flyash Concrete

It is shown that the alkalinity of pore fluid of high addition flyash concrete decreases more greatly than that of normal concrete after 7 days,closing to the threshold value of 11.5.Having added 10%lime and 1.5%Na2SO4 in flyash concrete,the alkalinity increased evidently without reducing its strength.     

Study on the Technology and Engineering Application Method of Sodium Silicate Bonded Sand Cured by Microwave Energy

The Influences of modulus and dosage of sodium silicate and microwave energy heat up technology for instant strength and retained strength are measured and analyzed by the numbers. The results show that instant strength is reduced when the time of microwave energy heat up is too long. The engineering application design is recommended.     

鱼糜漂洗液中水溶性蛋白质的回收与利用

研究了藻胶对链鱼糜漂行销认中水溶性蛋白质的凝聚作用,探讨了所回收的蛋白质返加到鱼糜中加以利用的可能性。结果表明,用褐藻胶作凝聚剂,蛋白质的回收率超过８０％,而废水的ＣＯＤ下降５０％左右;影响回收效果的主要因素有体系的ｐＨ值,蛋白质的浓度和褐藻胶的投加量等。将回收的蛋白质５％的比例添加于鱼糜中,制出的鱼香肠其凝胶强度基本不变。     

新鱼腥草素钠增强NDV LaSota疫苗免疫作用研究

用新城疫病毒(NDV) LaSota株弱毒活疫苗接种1日龄非免疫健康肉雏鸡的同时,以新鱼腥草素钠为免疫佐剂按不同剂量颈部皮下注射,以生理盐水为对照;二次免疫后第7、14、21、28天分别测定各组动物的抗NDV血凝抑制抗体和外周血CD4 /CD8 淋巴细胞比值.结果表明: 新鱼腥草素钠对提高鸡体抗NDV血凝抑制抗体效价和外周血CD4 /CD8 淋巴细胞比值都有一定作用,与对照组差异显著(P<0.05),且这种作用与给药剂量有关.另外,新鱼腥草素钠对细胞免疫的影响早于对体液免疫.     

采后硅酸钠处理对苹果梨青霉病的抑制

离体条件下,硅酸钠可抑制Penicillium expansum的菌丝生长,当浓度达到50 mmol/L时菌丝生长可被完全抑制.采用不同浓度的硅酸钠浸泡果实,可显著降低苹果梨损伤接种P.expansum的病斑面积,其中以200mmol/L的处理效果最好.硅酸钠处理可有效提高果实体内的过氧化物酶(POD)和多酚氧化酶(PPO)活性,促进过氧化氢(H2O2)和超氧化物阴离子(O2-)的产生,但对过氧化氢酶(CAT)和超氧化物岐化酶(SOD)活性的影响不大.由此表明,硅酸钠对梨果实青霉病的抑制与其的直接抑菌作用和诱导体内的抗性有关.     

Rheological properties of kafirin and zein prolamins

The possibility of forming dough from kafirin was investigated and laboratory prepared kafirin was formed into a viscoelastic dough system. Measurements with Contraction Flow showed that dough systems prepared from kafirin and from commercial zein had the required extensional rheological properties for baking of leavened bread. The extensional viscosity and strain hardening of the kafirin and zein dough systems were similar to those of gluten and wheat flour doughs. The kafirin dough system, however, unlike the zein dough system rapidly became very stiff. The stiffening behaviour of the kafirin dough system was presumed to be caused by cross-linking of kafirin monomers. SDS-PAGE showed that the kafirin essentially only contained α- and γ-kafirin, whereas the zein essentially only contained α-zein. Since γ-kafirin contains more cysteine residues than the α-prolamin it is more likely to form disulphide cross-links, which probably caused the differences in stiffening behaviour between kafirin and zein dough systems. Overall the kafirin dough system displayed rheological properties sufficient for baking of porous bread. Kafirin like zein appears to have promising properties for making non-gluten leavened doughs.     

Study on structure and molecular dynamics of starch/poly(sodium acrylate)-grafted superabsorbent by <Superscript>13</Superscript>C solid state NMR

The domain-structure of samples containing a series of starch/poly(sodium acrylate)-grafted superabsorbents, pure starch, pure poly(sodium acrylate), and blend of starch/poly(sodium acrylate) has been studied by high-resolution solid-state ¹³C NMR spectroscopy at room temperature. The result shows that the crystallinity of starch decreases greatly in the grafted and blended samples. The values of ¹H spin-lattice relaxation time in rotating frame T _1ρ and ¹H spin-lattice relaxation time T ₁ shows that starch and poly(sodium acrylate) components in both grafted and blended samples have good compatibility in nanometer scale. In the ¹³C cross-polarization/magic-angle-spinning (CP/MAS) spectra, the chemical shift of the carbonyl group of poly(sodium acrylate) depends on the composition of the grafting samples, which indicates that the starch and the poly(sodium acrylate) components of the grafting samples exhibit better compatibility with each other than that of blended samples at molecular level.