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调查4个仓库火腿节肢动物群落组成及结构的变化,应用群落特征参数、主分量分析和灰色系统分析方法分析昆虫群落特征及其在时间过程中的主导因素和时间格局以及与环境的关系。研究结果表明,火腿发酵时间的长短是影响火腿节肢动物群落结构及动态的主要因子,火腿发酵时间延长,火腿节肢动物群落多样性指数、丰富度指数及均匀度指数降低,而优势度指数和优势集中性指数则升高,主导宣威火腿节肢动物群落结构变化的主要特征指数是均匀度指数,同时多样性和丰富度在群落结构中也有较重要的作用,影响群落结构的环境因子主要是相对湿度。 相似文献
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采用电子舌、电子鼻、质构仪对宣威火腿的成熟时间与品质之间的关系进行了研究。结果表明,电子鼻/舌能将不同年份的宣威火腿很好地区分开来;火腿的硬度、咀嚼性随成熟年数的增加呈上升趋势,弹性呈先增大后减小的趋势,回复性呈先减小后增大趋势。上述结果说明宣威火腿在成熟的过程中,随时间增加其风味和质构呈现一定的变化规律,从而可以通过分析其风味和质构指标来快速判断其成熟时间。本研究为对宣威火腿进行鉴别和品级评价提供了基础数据。 相似文献
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[目的]为宣威火腿高值化利用与开发提供科学依据。[方法]以云南宣威火腿边角料为材料,用动物蛋白水解酶和风味蛋白酶复合酶解,制得最佳酶解液作为美拉德增香反应基液,研究了木糖、半胱氨酸盐酸盐、酵母抽提物的添加量和温度、时间等单因素对美拉德增香反应效果的影响,并通过L_(16)(4~5)正交试验进行优化。[结果]宣威火腿酶解液15 m L、木糖3.0%、半胱氨酸盐酸盐1.0%、酵母抽提物0.3%、火腿脂肪0.5%,在115℃下反应40 min,所得产品感官评分为68.33分。[结论]运用该条件下的美拉德增香反应制备的宣威火腿增香产品颜色为深红棕色,具有浓郁的火腿香味,是一种健康的风味基料。 相似文献
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宣威火腿简称云腿,以肉质色、香、味和嫩度口感皆佳而受到国内外消费者好评.但在急剧发展的原料肉猪生产中,出现了猪种组合多、乱、杂,导致火腿成品风味优劣并存.为了彻底解决此问题,实现云腿原料猪种(系)品牌化,特进行此项试验.于2001年底,集中宣威市内外颇受欢迎的4类配套系和1类三元杂共5类组合,在市种猪场,中等营养水平,气候节令、圈舍环境同等条件下进行对比筛选试验.结果,5类组合各有所长,但最主要指标-肉质风味以约滇陆(大约克♂×滇陆系♀)多项指标居第一,品味感官鉴定总分10.09分,肌肉脂肪4.97%,嫩度(剪切力值)2.66kg/cm.该配套系产活仔数11.00±2.65头,70日龄育成10.33±.08头,窝重202.47±37.73kg;育肥至180日龄窝均重908.22±164.45 kg.体重102.63kg时屠宰,屠宰率74.82%,胴体瘦肉率54.41%,眼肌pH值6.30±0.28,皆符合原拟理想指标.肉质风味评定居第二的是约大河乌(大约克♂×大河乌系♀),为8.93分,其它指标亦为合格范围.约长荣产活仔数180日龄全窝重皆居首位,但肉质风味各项指标皆不如前述2个组合.待火腿成品鉴评后即可最后确定首选猪种组合,在全市及邻县推广. 相似文献
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WANG Zhen-yu GAO Xiao-guang ZHANG Ji-hong ZHANG De-quan MA Chang-wei 《中国农业科学(英文版)》2013,(11):1993-2001
Fatty acid composition of neutral lipids(NLs),phospholipids(PLs)and free fatty acids(FFAs) from intramuscular fat(IMF),lipid oxidation and lipase activity in muscle Semimembranosus(SM) and msucle Biceps femoris(BF) of dry-cured Xuanwei ham during the 90-d salting stages were analysed.The salt content increased from 0.34 to 3.52%in BF and from 0.10 to 5.42%in SM during the 90 d salting stage,respectively.PLs of IMF in both BF and SM decreased 54.70%(P<0.001) and 34.64%(P<0.05),furthermore,the saturated fatty acids(SFA),monounsaturated fatty acids(MUFA)and polyunsaturated fatty acids(PUFA) of PLs in both muscles were hydrolysed almost isochronously.FFAs were increased from 0.46 g 100 g-1lipids to 2.92g 100 g-1lipids in BF at the end of salting,which was lower than SM(from 1.29 g 100 g-1lipids to 9.70 g 100 g-1lipids).The activities of acid lipase,neutral lipase and acid phospholipase all remained active in the 90 d.The thiobarbituric acid reactive substances(TBARS) was slowly increased to 1.34 mg kg-1muscle in BF and to 2.44 mg kg-1muscle in SM during the salting stage.In conclusion,the controlled salting process prompted the hydrolysis of PLs of IMF notably and increased the lipid oxidation of muscles within some limits. 相似文献
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Fatty acid composition of neutral lipids (NLs), phospholipids (PLs) and free fatty acids (FFAs) from intramuscular fat (IMF), lipid oxidation and lipase activity in muscle Semimembranosus (SM) and msucle Biceps femoris (BF) of dry-cured Xuanwei ham during the 90-d salting stages were analysed. The salt content increased from 0.34 to 3.52%in BF and from 0.10 to 5.42%in SM during the 90 d salting stage, respectively. PLs of IMF in both BF and SM decreased 54.70%(P〈0.001) and 34.64%(P〈0.05), furthermore, the saturated fatty acids (SFA), monounsaturated fatty acids (MUFA) and polyunsaturated fatty acids (PUFA) of PLs in both muscles were hydrolysed almost isochronously. FFAs were increased from 0.46 g 100 g-1 lipids to 2.92 g 100 g-1 lipids in BF at the end of salting, which was lower than SM (from 1.29 g 100 g-1 lipids to 9.70 g 100 g-1 lipids). The activities of acid lipase, neutral lipase and acid phospholipase all remained active in the 90 d. The thiobarbituric acid reactive substances (TBARS) was slowly increased to 1.34 mg kg-1 muscle in BF and to 2.44 mg kg-1 muscle in SM during the salting stage. In conclusion, the controlled salting process prompted the hydrolysis of PLs of IMF notably and increased the lipid oxidation of muscles within some limits. 相似文献
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为促进林农增收致富,对宣威市森林资源利用现状进行调查和分析,针对富民兴林建设中存在的"大资源、小产业"、资金投入不足、资源分布不平衡等问题,提出因地制宜增加投入、加强林业产业、强化服务体系和管理体系建设等措施。 相似文献
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