果蔬塑料保鲜薄膜的研究与应用

XG 型保鲜膜,是一种特制的改性聚乙烯保鲜薄膜,具有一定的杀菌作用和较好的透湿性。四年中,经多种果蔬产品的贮藏试用,结果表明:XG 保鲜膜可延缓果蔬衰老,减少失重率,维持良好的贮藏品质和降低产品的腐烂率。     

不同包装处理对花生仁贮藏品质影响研究

研究包装处理对花生仁保鲜效果的影响。分别对花生仁进行普通包装、真空包装、充氮包装,监测存储期间花生仁水分含量、过氧化值、酸价的变化,对比3种包装花生仁的贮藏品质。结果表明:包装处理能够明显改善花生仁的贮藏品质,其中包装的阻隔性对花生仁的保鲜效果影响显著,真空包装和充氮包装花生仁的过氧化值和酸价分别低于普通包装31%~50%、26%~47%,对两重要品质指标的劣化有明显的抑制作用,说明阻隔性包装能够有效提高花生仁的贮藏品质。     

国外无机果蔬保鲜剂

果蔬水份含量高,容易腐败变质,不耐贮藏,每每因为贮藏不善而造成巨大损失。因此,如何延长果蔬的贮存时间,保持其品质不变,已成为果蔬生产单位、经销商店和消费者所普遍关心和急待解决的问题。为保持果蔬品质不变沿用的提前采摘法,虽可延长贮存期,但有损于水果风味,不受欢迎;低温贮藏法,是目前应用最广的     

1-甲基环丙烯对番茄保鲜效果试验报告

研究了1-甲基环丙烯对番茄的保鲜效果。结果表明,用1-甲基环丙烯密闭熏蒸处理绿熟期番茄果实12h后,室温条件下贮藏,可使番茄的保存时间延长10d左右。和清水对照相比,药剂处理的番茄晚15d完全变红,硬度、酸度降低速度减慢,维生素C含量下降速度变快,可溶性固形物含量变化速度不大。药剂处理后番茄的腐烂率降低,药剂处理剂量35、70mg/m3贮藏后30d,番茄的腐烂率在30%以下,并且能够保持较好的风味和品质。     

基于电子鼻技术的食用大豆油品质快速评价研究

为了探索电子鼻对植物油品质的快速评价方法,利用电子鼻对食用植物油大豆油的新鲜样品和其贮藏变质样品进行检测分析。通过对所获得的数据进行主成分分析(Principalcomponent Aanalysis,PCA)、线性判别函数分析(Linear Discriminant Analysis,LDA)和荷载(Loadings)分析。结果表明:新鲜大豆油在电子鼻传感器上有明显差别的特征性响应图谱,它们的对应贮藏劣质大豆油也有明显的特征性响应图谱,而且电子鼻能够有效识别新鲜大豆油和对应贮藏劣质大豆油,将电子鼻应用于大豆油的品质鉴定具有一定的可能性。     

基因工程在食品工业中的应用

阐述了基因工程在改善食品原料品质、改革传统的发酵工业、改善食品品质和加工特性、增强果蔬食品的贮藏性和保鲜性能、生产保健食品与特殊食品以及食品检测等食品工业中的应用以及前景。。     

油茶籽贮藏方法对油脂品质的影响

以小果油茶的油茶籽为研究对象,分析了7种贮藏方法对其及相应的油脂品质的影响。研究了油茶籽鲜果的含水率、出仁率,不同贮藏条件下的鲜果和风干籽的含油率,油脂的酸值、过氧化值、不皂化物含量。结果表明：12个月贮藏期后,不同的贮藏条件对油茶籽的含油率和油菜籽油不皂化物含量没有显著影响;对油菜籽油酸值和过氧化值的影响较为显著。综合考虑油茶籽油酸值、过氧化值两个指标的变化规律,干籽玻璃瓶包装冷冻（-18℃）贮藏法是最适宜贮藏油茶籽的方法,经12个月的贮藏,其油茶籽含油率和茶油不皂化物含量稳定,茶油的酸值和过氧化值均处于较低水平分别为1.46 mg/g和16.60 mmol/kg。     

不同漆树品种种子品质的初步分析

<正> 种子品质的优劣直接关系到育苗质量和造林效果。对种子品质进行检验,一是可以判断它的实用价值,做到合理用种,以质论价;二是为种子的贮藏、运输提供科学依据,促进种子工作的科学化和标准化。     

果蔬防腐保鲜剂的筛选和应用(摘要)

<正> 水果、蔬菜收获后的霉变病害是使果蔬大量腐败的主要原因。许多腐烂性病菌即使在低温、气调、硅窗条件下也能引起浸染、发病和蔓延。尤其在运输贮存过程中,由于碰伤、过热和老化,抵抗病菌的能力逐渐下降,更易感染生理性和传染性病害,引起腐烂,势必降低贮藏品质,减少可食部份,导致大量损失。     

MAP处理对草莓采后生理的影响

本研究对采后草莓利用0.035 mm厚的PE保鲜袋进行包装并贮藏于0℃条件下,研究了不同体积分数的O_2、CO_2、和N_2的MAP包装方式对草莓贮藏效果的影响,结果表明,与其他MAP包装方式相比,F2处理(将草莓装入0.035 mm厚的PE保鲜袋中,抽真空,充入5%O_2+10%CO_2+85%N_2,封口)可以明显抑制草莓的呼吸作用,减缓了超氧化物歧化酶(SOD)活性的下降,维持了较高的过氧化物酶(POD)活性,抑制了丙二醛(MDA)含量的积累,降低了膜脂过氧化程度,保持了草莓的原有品质。     

贮叶条件对烟叶品质的影响

研究了贮叶条件对烟叶品质、烟草含水率以及形态的影响。结果表明：①在一定的条件下,贮叶时间对卷烟感官质量、烟丝填充值和化学成分基本无影响;随着贮叶时间延长,烟丝整丝率呈下降趋势。②在不同的贮叶环境条件下,贮叶时间对烟草含水率和温度幅度以及烟丝的物理形态产生不同程度的影响。     

2%阿维菌素微乳剂的稳定性研究

对2％阿维菌素微乳剂所用表面活性剂进行了筛选,研究了水质和温度对微乳剂稳定性的影响以及环境温度下贮存一年的稳定性。结果表明：该微乳剂的分解率低,水质影响小,质量稳定。     

库尔勒香梨冰温储藏实验

以库尔勒香梨为研究对象,在两种不同的温湿度条件下储藏香梨,一种存于冰温库中,库内温度为-1.7℃,湿度为87%,另一种存于普通冷库中,库内温度3℃,不设加湿装置。定期取样检测香梨的品质变化。实验结果表明,冰温储藏香梨效果要远远优于普通冷库储藏效果。     

3%啶虫脒微乳剂的稳定性研究

对3%啶虫脒微乳剂用的乳化剂进行了筛选,考察了水质和温度对微乳剂稳定性的影响及环境温度下贮存1年的稳定性。结果表明:该微乳剂分解率低,水质影响小,质量稳定,使用安全,社会效益显著。     

干水固化甲烷过程及反应特性研究

利用天然气水合物合成实验系统,采用5%纳米SiO2与纯净水配制的干水和纯甲烷为原料,获得了水合物生成过程中温度、压力、反应速率以及最终的储气密度之间的关系。通过以温度和压力值作为变量进行实验结果表明：在高压条件下,反应温度接近0℃,反应的速率较快,生成的水合物中甲烷含量也较高。在低温条件下,压力接近8 MPa时,干水固化甲烷效果较好。     

Storage of sunflower‐seeds: variation on the wax content of the oil

Storage conditions of oil seeds before industrial extraction might influence the quality of the crude oil. The objective of this work was to study the influence of sunflower seed storage conditions (temperature and time) on the quality of the resulting oil in terms of its wax content and composition. Sunflower seeds were stored under different conditions, 10, 21 and 37 °C, in sealed recipients. Extractions of the seeds with hexane were made to obtain the oil at different storage times. The amount of oil extracted (25–40%) showed no significant differences with storage conditions. Wax content of the samples was determined with two different methods (laser polarized turbidimetry and microscopy), and results showed that wax concentration increased with storage conditions (time and temperature). Composition of wax components, determined using capillary gas chromatography, during storage was approximately constant for C₃₅–C₃₉ and showed significant differences for C₄₀–C₄₈ components. Waxes with high carbon number cause more turbidity than waxes with low carbon number, due to their higher melting point, resulting in a low‐quality crude oil and therefore in variations in processing conditions during the oil refining. According to the data showed in this study, seed storage at low temperatures during short periods of time may be the more adequate conditions to obtain high‐quality oil.     

0.5%溴敌隆微乳剂的研制

报道了０．５％溴敌隆微乳剂的组成和制备方法,研究了温度、水质和贮存时间对制剂稳定性的影响,老查了制剂的杀鼠毒力和对鼠的适口性。     

The Effect of Different Cold Storage Conditions on the Compositions of Extra Virgin Olive Oil

Storage conditions can affect the stability and quality of extra virgin olive oil (EVOO). While many studies have reported the influence of high temperature and light exposure during storage, little is known on the influence of the cold storage. The aim of this study was to evaluate the effect of different storage conditions (25, 4.5 and ?27 °C) on the various compositions of EVOO and to determine if cold storage will prolong shelf‐life by retarding hydrolysis and oxidation. The changes of quality indices (FFA, PV, and UV) and natural antioxidants such as α‐tocopherol and phenolic compounds were evaluated periodically during storage. The characterization and quantification of phenolics were achieved by ultra‐performance liquid chromatography—diode array detector (UPLC‐DAD). In addition, 1, 2‐diacylglycerols (DAGs), pyropheophytin A (PPP) were measured to indicate thermal degradation during storage.     

Towards the comprehension of oxygen storage processes on model three-way catalysts

CeO₂- and Ce_0.63Zr_0.37O₂-supported noble metal catalysts were studied. Samples were fully characterized using TEM, XRD, N₂ adsorption and H₂ chemisorption. The oxygen storage process was investigated focusing on the evolution as a function of temperature of both the oxygen storage capacity (OSC) and the oxygen storage complete capacity (OSCC). Aging effect on OSC was also examined in details in the case of Rh catalysts. Finally, the major role of oxygen diffusion, partly influenced by the metal/support interface quality, was confirmed.     

贮存方式对树脂切割砂轮性能的影响

为解决树脂切割砂轮的性能随着时间的推移,主要受到外界环境如温度、湿度等因素影响而降低的问题,进行了收缩膜塑封、玻璃干燥器（内置硅胶）密闭装和常规贮存方式（塑料袋加一包干燥剂封口）对16寸大切片和4寸小切片性能的影响试验。结果表明：三种贮存方式下,切片性能的减弱程度是：收缩膜封装〉塑料袋＋干燥剂封装〉玻璃干燥器装。