不同包装及化学物质对黄金梨虎皮病的影响

以河北藁城产黄金梨为试材，研究了0℃低温贮藏条件下不同包装方式、抗氧化剂和常用防腐保鲜剂对黄金梨贮藏期间虎皮病的影响。结果表明：贮藏210d后，所有包装处理中以外黄内黑的双层袋包装效果最佳，其虎皮病情指数为1．55％；以含0.2％的二苯胺DPA保鲜纸和0.2％的DPA浸果处理效果明显，虎皮病情指数分别为0．87％和1．59％，显著低于其他处理；以1％的壳聚糖处理、0．0001％的活性铜ICC处理及浓度为2.5％CaCl2辅加0．1％的特克多TBZ等常用防腐保鲜剂对黄金梨虎皮病的抑制效果较为明显，病情指数分别为2．98％、4．34％、4．80％，且果实好果率高，分别为91.82％、92．26％、90．04％。     

气调包装中气体浓度对牛肉保鲜的影响

研究了气调包装中不同气体浓度对牛肉保鲜效果的影响。运用均匀设计法,对新鲜牛肉分别进行不同水平的气调保鲜包装(O2与CO2浓度在0%～100%均匀分布),在(4±1)℃贮藏过程中,隔天对包装内的气体浓度、牛肉的菌落总数、pH值、TVB-N值、液汁流失率、红度值等指标进行测定分析,并采用重回归分析法找出气调包装中O2浓度、CO2浓度、贮藏时间与菌落总数之间的关系式。结果表明:高氧或高CO2浓度的气调包装对牛肉保鲜效果都不理想,而适当的气体组合45%O2/30%CO2/25%N2的气调包装牛肉货架期最长。     

冬枣气调贮藏试验初报

研究了不同气体组合条件下，冬枣0℃T100d的贮藏效果。结果表明，气调有利于冬枣贮藏，适宜的气体环境能够明显防止冬枣的褐变与腐烂，保持果实的营养成分，减轻冬枣果实中乙醇的积累。冬枣贮藏的最佳气体成分O2为12％～15％，CO2为0。     

冰温气调贮藏对平谷大桃品质影响的实验研究

将冰温贮藏和气调贮藏相结合,开展了冰温气调贮藏对平谷大桃品质影响的实验研究.实验在冰温条件下从调节气体组分入手,研究不同气体指标对平谷大桃贮藏期间品质变化的影响.得出以下结论:冰温环境结合气调贮藏,能够更加有效地降低大桃的代谢作用.与-1.2℃普通冰温贮藏相比较,大桃在冰温结合氧气浓度为3％和5％环境下贮藏的品质要优于普通冰温贮藏,贮藏期间糖类和维生素C都保持较高的含量,并最后得出了平谷大桃保鲜的有效方法.     

香柚瓣贮藏保鲜技术研究

运用保鲜剂、低温、简易气调、辐照等综合措施对去皮香柚瓣贮藏技术进行了初步研究。结果表明：香柚去皮分瓣后，用0．15％山梨酸钾和0．15％苯甲酸钠的酸性溶液浸渍，用0．6％的CaCl2和0．5％的酶藻酸钠被膜，再用纸包装，经Co^60辐射处理，柚瓣在3－4℃下可贮藏35d。     

6-苄氨基嘌呤对气调包装芦笋贮藏的影响

6-苄氨基嘌呤对气调包装芦笋贮藏的影响研究结果表明，6-苄氨基嘌呤可明显抑制芦笋贮藏过程中的呼吸作用，延缓呼吸高峰的到来；对VC含量、过氧化物酶活性和叶绿素含量下降、细胞膜透性上升以及丙二醛浓度积累均具有抑制作用；6-苄氨基嘌呤处理结合气调包装贮藏可有效保持其绿色，对减少芦笋采后损失和保持品质，具有较好的作用．     

蒜苔气调贮藏的研究

在0℃条件下,气调贮藏蒜苔的合适气体指标,O2为16%或25%,CO2为5%左右。如果CO2浓度高于1015%,导致蒜苔发生CO2严重伤害。用塑料大帐气调贮藏的蒜苔和用塑料袋小包装贮藏的蒜苔,其外观和品质均比传统的“冰埋法”贮藏的蒜苔好。在相同的贮藏条件下,北京种植的蒜苔的贮藏寿命比山东种植的蒜苦的贮藏寿命长。     

绿芦笋自发气调贮藏保鲜袋的设计和适宜气体组成确定

以产品呼吸和薄膜渗气往一定条件下达到平衡时，能自发调节保鲜袋内O2和CO2浓度为依据，用改变薄膜厚度、面积、贮藏量的方法调节袋内气体组成。在大量试验数据基础上，用计算机回归设计的芦笋自发气调贮藏保鲜袋，能够使芦笋贮藏保持在3．2％～8．3％O2；3．5％～5．3％CO2的适宜气组成范围内，保鲜效果优良。     

气调贮藏对瑞雪苹果的保鲜效果与果皮褐变机制的初探

该研究拟评估0℃冷藏和气调贮藏对瑞雪苹果品质的影响,并探究贮藏期间果皮褐变的原因,为采后保鲜提供参考依据。以套袋瑞雪果实为试材,设置冷藏[(0±0.5)℃,湿度90%～95%]和气调贮藏[2%～3%O₂+1%～1.5%CO₂,(0±0.5)℃,湿度90%～95%]2组处理,通过测定贮藏期间瑞雪果实硬度、失重率、可溶性固形物、可滴定酸含量变化和瑞雪果皮总酚、类黄酮、多酚氧化酶、过氧化氢酶、超氧化物歧化酶活性和DPPH自由基清除率的变化,比较冷藏和气调对瑞雪苹果的保鲜效果。结果表明,相比于冷藏,气调贮藏抑制了瑞雪果皮褐变率和褐变指数的升高,且在贮藏60 d后差异极显著。气调贮藏较冷藏减缓了瑞雪果实贮藏品质的降低速度,降低贮藏损失：整个贮藏期,气调贮藏的硬度、可溶性固形物含量显著高于冷藏;在60～180 d,气调贮藏的失重率显著低于冷藏;在60～210 d,气调贮藏的可滴定酸含量显著高于冷藏。整个贮藏期,气调贮藏瑞雪果皮的总酚含量、超氧化物歧化酶和过氧化氢酶活性显著高于冷藏,同时气调贮藏瑞雪果皮的多酚氧化酶活性极显著低于冷藏;在贮藏60～210 d...     

硅窗气调包装保鲜贮藏茶树菇呼吸特性与贮藏品质的研究

以乙醇作为厌氧呼吸的指标，评估气调包装贮藏茶树菇时厌氧呼吸产生的条件，探讨硅窗对茶树菇的呼吸特性与贮藏品质变化的影响。结果表明：与普通气调相比较，硅窗气调能明显改善茶树菇贮藏的气体环境。贮藏温度为3℃，硅窗面积0．9cm。以上和贮藏温度为7℃，硅窗面积1．2cm。以上，都能避免厌氧呼吸的发生，茶树菇有更好的贮藏品质。     

蛋白质水解度测定方法综述

对目前国内外常用的蛋白质水解度测定方法进行了综述，其中pH—state方法是通过滴定水解过程中释放的质子测定DH；OPA、TNBS及国内常用的水合茚三酮和甲醛等测定方法是利用游离氨基的反应测定DH。     

聚多元羧酸盐的合成及应用

研究了聚多元羧酸盐的合成方法及反应机理,将其应用于洗涤剂和PVC制品中分别代替三聚磷酸钠和邻苯二甲酸二丁酯,证明有良好效果。     

SEROLOGIC IDENTIFICATION OF SPECIES OF ORIGIN OF SAUSAGE MEATS

SUMMARY: A partially purified immunoglobulin G (lgG) solution prepared from the serum of species to be tested was heated to the specifications for sausages. The resulting supernatant fluid was decanted and the precipitate washed with saline and used to immunize rabbits. The supernatant fluid was used to sensitize tanned sheep red blood cells. The immune serum was rendered monospecific by absorptions with heterologous, heated lgG precipitates. A sample of monospecific immune serum was absorbed with a washed homogenate of sausage. Aliquots of the monospecific immune serum, both untreated and sausage absorbed, were tested with cells sensitized with the homologous heated lgG supematant fluid. A significant reduction of titer by sausage absorption indicated that the sausages contained the meat homologous to the immune serum.     

BASIS OF STABILITY OF AMINE SALTS OF LINOLEIC ACID

SUMMARY— The mechanism and generality of the known stabilization against autoxidation conferred on linoleic acid by certain basic amino acids, such as lysine and arginine, was investigated. Basic amino acids were the only class of compounds found to confer the effect. However, the smallest basic amino acid, 2,3-diaminopropionic acid, was not effective, nor was αβω-diaminc acid, 3,6-diaminohexanoic acid, although a simple isomer of lysine. The stabilization was observed only in the solid phase. Inclusion of sodium chloride in the solid matrix was deleterious to the effect. A large number of physical and chemical observations were made and correlated but it has not been possible to draw detailed conclusions about the mechanism of stabilization, nor can a detailed structure of the stabilized complex be suggested. The cause of the phenomenon appears to be closely associated with the physical arrangement of the ions in the crystal lattice.     

百年风尚

一场流光溢彩、赏心悦目的展览,一段百年风尚演进的传奇旅程,一次东西方文化艺术的完美对话。2013年9月13日,“博萃臻艺一中西方珍宝艺术展”在辽宁省博物馆举行了隆重的开幕仪式,法兰西共和国驻华大使白林女士、辽宁省文物局局长丁辉先生、辽宁省博物馆馆长马宝杰先生、卡地亚全球总裁兼首席执行官邓阁仕先生、卡地亚区域行政总裁（北亚洲）陆慧全先生、卡地亚中国区首席执行官陆意斯先生、辽宁省文物店总经理张春鹰先生,以及众多文化界与文博界的贵宾齐聚一堂,共同见证了这场文化艺术盛事。     

STABILITY OF AQUEOUS EMULSIONS OF THE ESSENTIAL OIL OF HOPS

Hop oil emulsions prepared from different varieties of hops have been found to exhibit enhanced physical stability on the addition of blends of the emulsifiers Span 20/Tween 80 or Span 60/Tween 60. Examination of the particle size and volume distributions of an emulsion by use of a Coulter Counter was found to be an excellent method of monitoring its stability. An indication as to the relative efficiency of emulsifiers can be obtained from Coulter Counter measurements on hop oil emulsions after storage for 4 days. The use of an ultracentrifuge provies a rapid means of testing emulsion stability and hence the effectiveness of emulsion stabilizers.     

矩阵乘积的行式,列式

给出了ｍ×ｍ矩阵与ｍ×ｎ矩阵的行（列）式的表达式．若Ａ＝ａ１１ａ１２…ａ１ｍａ２１ａ２２…ａ２ｍ……ａｍ１ａｍ２…ａｍｍＢ＝ｂ１１ｂ１２…ｂ１ｎｂ２１ｂ２２…ｂ２ｎ……ｂｍ１ｂｍ２…ｂｍｎ分别是ｍ×ｍ，ｍ×ｎ矩阵，则｜Ａ｜｜Ｂ｜＝｜ＡＢ｜＋∑ｉ１＜ｉ２＜…＜ｉｔｊ１＜ｊ２＜…＜ｊｔ１≤ｔ≤ｍｎ－ｔ≥ｍＮＢｉ１ｉ２…ｉｔｊ１ｊ２…ｊｔＮＡＢ１…ｍ（－１）ｓｔ＋１ｊｔ＋１…（－１）ｓｎｊｎ其中ｉ１，ｉ２，…，ｉｔ是１，２，…，ｍ中ｔ个数码；ｊ１，ｊ２，…，ｊｔ，ｊｔ＋１，…，ｊｎ是１，２，…，ｎ的一个排列；ｓｒ＝π（ｊ１，ｊ２，…，ｊｔ，ｊｒ）（ｒ＝１，２，…，ｎ）是排列ｊ１，ｊ２，…，ｊｔ，ｊｒ的反序数．     

DEVELOPMENT OF CHAINS OF CELLS OF SACCHAROMYCES CEREVISIAE DURING FERMENTATION

The lengths of chains of cells of Saccharomyces cerevisiae were studied during fermentation. Pitching yeast generally contained about half of the total number of cells as two-celled chains. The chain lengths varied during the subsequent fermentation and the variations were characteristic of the strain. Electronic counting assessments of chain length were unreliable.     

基于复合运动理论推导求点的速度及加速度的球坐标法

本文基于点的复合运动理论,用球坐标法推导出点的速度及加速度的计算公式,进一步论证了理论力学中点的速度,加速度公式的正确性。     

计算机辅助选择造型方法的研究

本文论述了计算机辅助选择造型方法,以探讨计算机辅助教学的选题、编程、使用等技术.