Gelation of Turkey Breast and Thigh Myofibrils: Effects of pH, Salt and Temperature

Salt concentration >0.1M and pH were important to the development of gel fracture properties. Howcvcr, meat type and salt concentration (0.5–1.0M) did not influence gel shear stress or shear strain. Isothermal heating temperature (55°C or 70°C) affected only gel shear strain. Rheological properties at fracture and nonfracture did not respond alike to changes in gclation conditions. General similarities between breast and thigh myofibril gels implied that protein isoforms were not the main factor influencing gel structure formation.     

Characterization of plasma membrane H+-ATPase from salt-tolerant yeast Candida versatilis

Plasma membrane was isolated from the salt-tolerant yeast Candida versatilis and the ATPase in plasma membrane was characterized. The ATPase was a typical H⁺-ATPase with similar properties to the Saccharomyces cerevisiae and Zygosaccharomyces rouxii enzymes. It was reacted with antibody (IgG) raised against S. cerevisiae plasma membrane H⁺-ATPase. The ATPase activity was not changed by adding NaCl and KCl to the assay solutions, but was increased by NH, especially by ammonium sulfate. In vivo stimulation of ATPase activity was observed by the addition of NaCl into the culture medium, as observed in Z. rouxii. No in vivo activation of H⁺-ATPase by glucose metabolism was observed in C. versatilis cells and the activity was independent of the growth phase, like Z. rouxii and unlike S. cerevisiae cells.     

非离子表面活性剂在旧报纸中性脱墨中的应用

研究了不同非离子表面活性剂之间、非离子与阴离子表面活性剂之间的协同作用,以及不同无机盐、酶制剂对非离子与非离子表面活性剂、非离子与阴离子表面活性剂复配体系脱墨效果的影响。结果表明,非离子表面活性剂(A7)对旧报纸的脱墨和纤维性能的改善有良好效果;两种表面活性剂(A7和A4)协同作用效果更好。在中性条件下,无机盐的加入对脱墨体系也有一定影响;酶制剂的加入对脱墨效果有较大的促进作用。     

Determination of nitrite and nitrate levels in meat and vegetable products by high performance liquid chromatography

A range of fresh and processed meat and vegetable products was analysed by h.p.l.c. for nitrite and nitrate contents. Satisfactory results were obtained for vegetable products and most meats, but some meat products were subject to matrix interference. Sucrose, sulphate and phosphate did not affect results. Added sodium chloride decreased retention time of nitrite and increased apparent levels of both nitrite and nitrate. Ascorbic and erythorbic acids decreased apparent nitrite levels and correspondingly increased apparent nitrate levels.     

内标-电感耦合等离子发射光谱法测定高盐废水中镍

在环保化工行业中,由于废水多为高含盐废水,如果按照地表水、地下水的测试方法对其重金属指标进行测试,其测试结果和真实值之间存在较大的偏差。本文采用等离子发射光谱-内标法测定含高盐废水体中的镍含量,相对偏差小于0.5%;并用火焰原子吸收氘灯扣除背景法以及阳极溶出伏安法进行比较和验证,重现性良好,能够满足分析测试的要求,故等离子发射光谱-内标法适合于该类废水中镍的分析,方便、准确、可行。     

盐坨单位切割阻力的试验

堆放的盐坨因重新结晶而结块 ,堆放的时间愈长重结晶愈严重 ,单位切割阻力愈大。文章使用简易的测试装置 ,对盐坨和盐样分别进行了现场测试和实验室测试 ,得出了盐坨的单位切割阻力值范围     

国内外盐湖卤水锂资源及开发现状

简要介绍了国内外盐湖锂资源状况及开发现状，并就我国盐湖卤水锂资源的开发提出了建议。     

模拟海洋大气环境对XCS-lode钢与30CrNi3Mo钢腐蚀行为的影响

采用盐雾腐蚀试验方法,研究了模拟海洋大气环境下XCS-lode钢与30CrNi3Mo钢的腐蚀性能,通过极化曲线及电化学阻抗谱(EIS)试验研究了两种钢在腐蚀行为上的差异.结果表明:XCS-lode钢相比30CrNi3Mo钢具有更高的自腐蚀电位,XCS-lode钢腐蚀产物膜的阻抗明显大于30CrNi3Mo钢,XCS-lo...     

熔盐单罐双盘管释热换热器布置方式优选

为了获得单罐内盘管换热器最佳的布置方式,利用数值计算的方法研究相同换热器面积不同盘管换热器布置方式对单罐蓄热系统释热性能的影响规律。结果表明,叉排双螺旋盘管换热器的释热性能优于单排盘管换热器,且内盘管高外盘管低（hi=90 mm,ho=174 mm）的布置方式换热器其释热功率、出口温度以及累计释热量最大。