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排序方式: 共有174条查询结果,搜索用时 281 毫秒
1.
辐射技术在食品加工中的应用 总被引:9,自引:0,他引:9
综述了食品辐射加工的原理及其作用效果,以及该技术在欧美的应用现状及存在的发展障碍。 相似文献
2.
Experiments with washing of carrot slices using distilled water and 0.9% (w/w) NaCl in combination with varying number and
pulses of high intensity white were carried out. Slices of carrot 3.5 cm in diameter and 2 mm thick were inoculated using
diluted dispersions of yeasts (Saccharomyces cerevisiae) for varying time (0–240 min) and then the slices were treated with high intensity pulsed white light (one pulse = 0.7 J/cm2) using from none to 24 pulses. The major part of the yeast cells were killed using two pulses of light. The studies included
washing of inoculated slices up to five times using salt 0.9% (w/w) NaCl and distilled water and inoculation at 22 °C for
between 5 and 120 min. It was concluded that treatment of carrot slices with high intensity white light may reduce the load
of yeast cells with up to 6 log cycles. Inoculation time at 22 °C had no effect on the maximum load of yeast cells. 相似文献
3.
Shigezo Naito 《臭氧:科学与工程》2006,28(6):425-429
Ozone has the strongest oxidization effect after fluorine, and this property has been used in sterilization for food and processing plants in Japan. Moreover, there is no fear of toxic residues as with chlorine-based sterilizers and no hazardous trihalomethanes are formed. Based on these advantages, ozone has been used in water and air treatment for food products food materials and food processing plants. Use in the food processing is now increasing in Japan. This paper describes ozone sterilization, introducing sterilization systems and equipment applied to food in Japan. 相似文献
4.
针对空调冷却水循环系统的水质存在沉积物附着、设备腐蚀以及微生物大量滋生等问题,进行了不同臭氧投加量下臭氧的缓蚀、阻垢和杀菌试验研究.结果表明,臭氧对碳钢的缓蚀效果与水中臭氧浓度有关,当水中臭氧浓度小于0.5 mg/L时,缓蚀率随着臭氧浓度的增加而增加,但当水中臭氧浓度大于0.5 mg/L时,缓蚀率反而下降;投加臭氧的阻垢率在17%~25%,并且臭氧的投加量对阻垢效果影响不大,阻垢效率不明显;臭氧的杀菌效果很好,臭氧浓度为0.25 mg/L时灭菌率可达到99%以上. 相似文献
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7.
Panagiotis Vlachos Adamantia Kampioti Michael Kornaros Gerasimos Lyberatos 《European Food Research and Technology》2007,225(5-6):653-663
Cork taint, one of the most known off-flavours in wine, is usually attributed to the presence of the aromatic compound 2,4,6-trichloroanisole
(2,4,6-TCA) in cork stoppers made from the bark of the cork oak, Quercus suber. There are many major chemical/biochemical pathways through which 2,4,6-TCA can be formed during cork production. The estimated
incidence of cork-tainted wine bottles ranges from 2–to 7%, costing global wine industry approximately US$ 10 billion annually.
During this study, a laboratory-scale system was designed and constructed, to efficiently treat cork bark and stopper samples
using ozone and/or other sterilizing gases, such as steam, via sequential application of pulsed vacuum–pressure cycles. The
developed physicochemical processes were studied and evaluated in order to achieve both sterilization conditions and 2,4,6-TCA
removal without affecting the mechanical and bottling properties of cork. According to the results, the application of ozone
alone seems to be a promising treatment method for cork barks. However, the pulsed treatment ensures both sufficient removal
(99%) of both bacteria and moulds from cork stoppers when combined with ozone or steam and satisfactory deodorization of cork
stoppers achieving high percentages (90%) of 2,4,6-TCA removal when combined with steam. The operating cost of each alternative
process (plain or pulsed, with or without ozone and/or steam) was estimated and compared, in laboratory scale, for the selection
of the most efficient process, taking into account technicoeconomical aspects. 相似文献
8.
从油藏物性着手,结合化验手段分析出地层渗透率下降是由于水质变化和细菌污染所引起,需要对油层进行酸化、杀菌以解堵增注。酸化液体系主要包括预处理液、前置液、氧化杀茵液、主体酸、后置酸,在确定酸化液体系后,开展了酸化液性能评价的室内实验,实验包括4个方面的内容:酸化液的腐蚀性、杀菌性、防二次伤害及穿透性,实验结果表明该酸化液体系能满足文87区块的酸化增注要求。以室内实验为依据开展现场应用,文87—8井在施工前注入压力为36MPa、日注入量为33m3,施工后注入压力为21MPa、日注入量为70m3,酸化液的各组分体积为:预处理液4m3、前置液8m3、氧化杀菌液5m3、主体酸15m3、后置酸4m3、顶替液12m3,矿场实践表明该酸化液体系能满足文87区块的酸化增注要求。 相似文献
9.
采用最大可能计数法对两种季盐型缓蚀剂BHP 1及BHP 2的杀菌效果进行了评价。结果发现 ,BHP 1具有良好的杀菌性能 ,且最佳杀菌浓度为 6 0× 10 -6g/L ,两者的杀菌效果均优于广泛使用的新洁尔灭。采用电化学方法、腐蚀失重实验及表面分析法研究了 4 5 # 碳钢在含硫酸盐还原菌 (SRB)的厌氧体系中的腐蚀行为。结果表明 :SRB能加速 4 5 # 碳钢的点蚀破坏。两种季盐能有效控制SRB溶液对 4 5 # 碳钢的腐蚀破坏 ,使点蚀电位正移 ,对SRB溶液中的 4 5 # 碳钢具有良好的缓蚀作用 ,缓蚀效果为BHP 1>BHP 2 相似文献
10.
压榨车间电化学杀菌及蔗汁杀菌机 总被引:1,自引:0,他引:1
介绍了蔗汁杀菌机的初步使用情况,阐述了它的工作的电化学原理和控制原理,初期运动情况及存在问题。 相似文献