全豆豆浆与传统豆浆感官品质和营养成分对比

以大豆为原料,通过感官评定对胶体磨技术自制的全豆豆浆和一般机械磨加工的传统豆浆中的永和豆浆和普通豆浆的感官品质进行了比较,通过营养成分检测对全豆豆浆和永和豆浆的营养成分进行了比较,同时将检测的全豆豆浆营养成分与中国食物成分表中的普通豆浆的营养成分进行比较。结果表明:全豆豆浆口感浓厚,细腻爽滑,豆香味浓郁,无豆腥味,感官评价总得分高于传统豆浆中的永和豆浆和普通豆浆,差异有统计学意义(P0.01);全豆豆浆中蛋白质、脂肪、总膳食纤维、维生素B1、维生素B2、钙、磷脂及大豆异黄酮等营养成分含量均高于永和豆浆,更高于普通豆浆。全豆豆浆的普及不仅可以提高豆浆的营养价值,还可以减少资源的浪费,具有一定的社会和经济效益。     

Control of retention in paper-making by colloid titration and zeta potential techniques

The concentration influence of some commercial polyethylenimines, used as retention agents, on the retention efficiency during the sheet formation is studied in this paper. The conditions of an industrial wire end have been simulated by means of a dynamic jar of exclusive design. Measurements of the zeta potential have been taken to quantify the surface charge of particles and the colloid titration ratio (quotient between the cationic demand and the anionic demand of pulp slurries) has been evaluated. Both techniques have proved convenient to monitor the retention level; therefore, they are efficient methods to control the retention level in the sheet formation. The univocal relation existing between zeta potential and the logarithm of the colloid titration ratio has been demonstrated. Finally, the variation of the level of turbulence has proved the importance of the hydrodynamics factors in the retention.     

草萘胺在五种土壤及其胶体上的吸附行为

土壤胶体是土壤中颗粒最细小的部分,由于具有巨大的比表面积和较高的吸附容量,是环境中污染物的重要吸附剂,直接影响到污染物的归趋和生物有效性.本文采用批次吸附试验的方法,研究了农药草萘胺在黄棕壤等5种土壤及土壤胶体上的吸附行为.结果表明,草萘胺在供试土壤及胶体上的吸附均能很好地符合Freundlich方程;与本体土壤相比,...     

Efficiency of three boar sperm enrichment techniques

The objective of the study was to investigate the efficiency of three enrichment methods to separate boar spermatozoa. Twenty-four ejaculates from 12 boars (2 ejaculates/boar) were extended (30 × 10⁶ spermatozoa/mL) in commercial Beltsville Thawing Solution. Each semen sample was processed with glass wool column (GW) and glass beads (GB) filtration and with the single-layer centrifugation (SLC) technique. Semen samples before (control; C) and after treatment were evaluated for sperm CASA motility/kinetics and concentration, viability, morphology and chromatin integrity. Data were analysed with mixed models. The concentration of total and motile spermatozoa was significantly decreased after treatment in groups GW and SLC, but not in group GB. Group GW showed increased values of WOB compared with both groups C and GB. Group GB showed greater values of rapid movement spermatozoa and lower values of slow movement spermatozoa compared with group C. In group SLC, higher values of VSL, LIN and STR were observed compared with group C. In conclusion, all techniques under examination enhanced various CASA variables. Based on our results, the GB method is a promising alternative separation technique for boar sperm and deserves further research regarding swine in vitro fertilization.     

胶体金对小鼠细胞免疫的影响

实验设计了四种直径和三种剂量12个组合的胶体金（CG）对小白鼠进行注射处理；采用MTT法、放射性免疫法、LDH短程释放法，测定了T、B淋巴细胞增殖活性及其腹腔巨嗜细胞活性，外周血血清和脾脏淋巴细胞诱导白介素2含量和脾脏NK细胞活性，结果表明：不同直径和剂量的CG对机体有不同程度的影响，其中直径15nm、10nmCG的0.3mL和0.2mL剂量组不仅对T、B淋巴细胞增殖活性和血清中IL-2含量有显著促进，也可显著提高腹腔巨噬细胞活性及脾脏NK细胞杀伤活性，0.1mL剂量组虽有提高但不显著；直径5nm、20nm各个剂量组效果的波动较大，中、高剂量组对四项指标起促进作用但不显著，低剂量组则没有促进作用。证明了15nm和10nm中高剂量的胶体金可显著提高小鼠机体特异性和非特异性细胞免疫功能。     

免疫层析快速诊断试纸条的制备及在养猪业上的应用

胶体金免疫层析技术是一种微量、特异、简便和结果容易判定的新的检测方法,非常适用于基层兽医和猪场。本文综述了免疫层析快速诊断试纸条的基本原理、制备方法、标记技术以及目前在养猪业上的应用情况。     

低分子量有机酸对胶体矿物吸附酸性磷酸酶和牛血清白蛋白的影响 Ⅰ.乙酸的影响

研究了不同pH和乙酸浓度下 ,乙酸对酸性磷酸酶和牛血清白蛋白 (BSA)在土壤胶体、矿物表面吸附的影响。结果表明 ,在pH 2～ 8的乙酸体系中 ,酸性磷酸酶和BSA在胶体矿物表面的最大吸附pH值一般出现在蛋白的等电点和矿物的电荷零点 (PZC)之间。各土壤胶体和粘粒矿物对酶和BSA的吸附量大小顺序为 :针铁矿 黄棕壤 >砖红壤 >高岭石 >二氧化锰。乙酸浓度对蛋白分子在胶体矿物表面的吸附量和吸附结合能具有较显著影响 ,在 0～ 2 0 0mmolL- 1范围 ,随着乙酸浓度的增加 ,蛋白吸附量呈现出先升高 ,后降低 ,再稳定的趋势 ,而吸附结合能的变化与此相反。本文还就乙酸对酶和BSA吸附影响的可能机理进行了初步探讨。     

家蚕微孢子虫(Nosema bombycis)侵染家蚕丝腺组织后的免疫胶体金标记观察

为了探讨家蚕微孢子虫(Nosema bombycis)功能基因组研究方法和手段,利用免疫胶体金标记电镜技术,对被感染的家蚕丝腺组织中家蚕微孢子虫的蛋白质分泌状况进行了观察。结果显示,有大量的胶体金颗粒存在于家蚕微孢子虫寄生位点的宿主组织内,说明了家蚕微孢子虫寄生位点的宿主组织内存在大量的孢子蛋白质,证实了家蚕微孢子虫在寄生过程中将许多孢子蛋白质分泌到宿主体内。初步探讨了家蚕微孢子虫与宿主家蚕之间的互作关系。