不同气调包装对池沼公鱼保鲜品质的影响

[目的]研究不同气调包装的新鲜池沼公鱼在冷藏下的保鲜品质.[方法]通过对池沼公鱼的感官性状、液汁损失率、挥发性盐基氮（TVB-N）、硫代巴比妥酸值（TBA）和pH等指标的检测来比较不同气调包装方式对池沼公鱼在冷藏期间（0±1）℃保鲜品质的影响.[结果]试验表明,气调包装可通过抑制产品中细菌的增加,防止腐败变质,从而有效延长产品的货架期.[结论]研究可为延长冷藏池沼公鱼货架期的气调保鲜工艺提供参考依据.     

水产食品特定腐败菌与货架期的预测和延长

Fresh fish and lightly preserved fish products are welcome by the global market, however, they are also among the most perishable food products. The research on specific spoilage organisms (SSO) reveals the spoilage process of aquatic product. This paper reviews the current knowledge (past ten years) on SSO of fresh fish and lightly preserved fish products with particular emphasis on characteristics of SSO and how to apply this concept to determine, predict and extend the shelf life of aquatic product. During storage, the microflora changes owing to different abilities of the microorganisms to tolerate the preservation conditions. SSO is defined as special microorganisms which can increase rapidly during preservation and has the ability to produce off- odours and off- flavours associated with spoilage, and spoilage metabolites. Identification of an SSO relies on comparison of the sensory and chemical characteristics of spoiled product with those of isolates from the spoilage microflora. Generally, the SSO of fresh fish may be a single species or genus, but the ones of lightly preserved fish products will be more complex. One exciting area for use of SSO aims to obtain quantitative knowledge about probable behavior of SSO and their function during the progression of spoilage. Thus mathematical models on the growth of SSO are established to evaluate the quality lost degree of product, which provide a sound information for the rational development of devices to monitor loss of products shelf life. Models for the growth of Pseudomonas spp, S. putrefaciens, P. phosphoreum have been established, and validated for shelf life prediction of seafood successfully. Another application field of SSO intends to develop the techniques to prolong the shelf life of food products by inhibiting SSO targetedly. Targeted inhibition of spoilage bacteria during preservation reduces their growth and results in a significant extension of shelf life in despite of the activity of non - spoilage organisms has not been influenced. Such techniques have been applied in perversion field of fresh fish and lightly preserved fish.     

辽西地区日光温室冬春茬西葫芦栽培技术

一、选择优良品种法国冬玉:该品种植株发育平衡,耐寒性好,适应性广,栽培管理容易,带瓜力强;瓜条稳定,长圆柱形,长22~24厘米,粗6~7厘米,单瓜重300~350克,浅绿色有光泽,成品率高,商品性好,耐运输,货架期长;单株采瓜30个以上,采收期可达200天,平均亩产30000斤,产量高,效益好。二、适时播种培育壮苗     

肉类腐败变质时菌落总数(SPC)临界值的研究

本研究各用五组猪、牛、羊肉、在常温下置放，然后比较其感官指标、微生物指标、理化指标、测定肉类腐败变质时的菌落总角定其腐败变质时的临界值，借以快速确定肉类商品的货架期是否已经结束。     

微气调袋包装对采后金针菇品质的影响

10℃下，采用微气调袋包装金针菇，观察其货架寿命与品质变化。结果表明：微气调袋包装使金针菇货架期比传统密封薄膜袋包装延长了3d，呼吸代谢和蒸腾作用得到有效地抑制，菇体的商业品质能较好地保持。     

长货架期番茄产业化发展及无公害栽培技术

<正>番茄俗称西红柿,是深受世界各国人民喜爱的蔬菜品种之一,它富含多种维生素等营养成分,其健康保健功能已在世界范围内达成广泛共识,因此在世界各国的饮食结构中占有越     

黑莓优良品种——纳瓦好

纳瓦好是从美国引进的黑莓杂交品种。该品种表现为直立、无刺，浆果小到中等大，是黑莓较甜的品种，较硬，耐运输，在1～2℃条件下浆果货架期14-21天。纳瓦好具有生长势强、产量高、品质好和成熟期早等特点，值得推广。成熟果实酸甜爽口，鲜食加工皆宜。     

鸡腿菇盐渍加工技术

由于鸡腿菇子实体成熟快,货架期短,鲜销保质期一般只有1～2天.因此,将其加工成盐渍品贮藏保鲜是解决其保鲜期短的有效方法.现将盐渍鸡腿菇加工技术介绍如下.1 采收在菇蕾期即菌环紧包菌柄,菌盖表皮呈现出平伏状鱼鳞片,高度在10～15cm之间时迅速采收.若在菌环松动后采收,将影响盐渍菇质量.采收时应按鸡腿菇大小分开放置,轻拿轻放,保证菇体完整、无破损,菇脚应切削整齐.     

壳聚糖对草莓冷藏和货架期间品质的影响

以"达赛莱克特"草莓为试材,研究1%壳聚糖处理的草莓果实在0℃低温贮藏7 d后20℃常温货架6 d期间的品质变化规律。结果表明:与对照(0.1%醋酸溶液处理)相比,壳聚糖处理降低了低温贮藏后期和货架期草莓果实的呼吸速率、花青素、类黄酮及酚类物质的含量,保持较高的果实硬度,显著减少了货架期草莓果实腐烂和霉菌的发生,对果实失重率和可溶性固形物含量无显著影响。表明1%壳聚糖处理可有效延缓草莓的采后衰老进程,延长果实的货架期。     

草莓的保鲜技术

草莓是非跃变呼吸型果实,含水量高、皮薄、组织娇嫩,极易受损伤而腐烂变质,而且由于其果实属浆果,在常温情况下,放置1天￣3天就开始变色、变味,因此不耐贮藏和运输,通常贮藏期为1天￣2天,货架期极短,仅限于产地销售且上市时间集中,严重限制了草莓社会效益和经济效益的提高。因此,研究草莓保鲜技术已成为草莓生产与流通中亟待解决的问题。1.速冻冷藏(1)原理利用-25℃以下的低温,在极短时间内将草莓迅速冻结,抑制了细菌、霉菌和酶的活动,以及果实呼吸作用造成的营养消耗,达到长期贮藏目的。(2)操作要点①选果。选用大小均匀一致、无损伤、无病…