乳化剂和增稠剂对核桃乳饮料稳定性的影响

研究了乳化剂和增稠剂对核桃乳稳定性的影响。增稠剂采用黄原胶、果胶、海藻酸钠和CMC-Na;乳化剂采用单甘酯和蔗糖酯,研究其单一使用及复合使用对核桃乳稳定性的影响。结果表明:单一增稠剂对核桃乳的稳定效果依次是:黄原胶>果胶>海藻酸钠>CMC-Na。乳化增稠复合剂配方为海藻酸钠0.3%、黄原胶0.15%、果胶0.15%。单甘酯和蔗糖酯(其比例为7:3)0.1%;使用该乳化增稠剂生产的核桃乳,黏度适当、具有较高的稳定性,感官评价好。     

响应面法优化红枣豆奶复合稳定剂配方

以浓缩枣汁、大豆为原料研制复合蛋白饮料,探讨了复配乳化增稠剂对红枣豆奶稳定性的影响。在单因素的实验基础上,应用正交实验确定复合增稠剂的最佳配比和添加量范围,通过Box-Benhnken响应面法考察了复合增稠剂、蔗糖脂肪酸酯、蒸馏单硬脂酸甘油酯及其交互作用对红枣豆奶稳定性的影响,利用软件Design Expert 8.0.6.1对实验数据进行回归分析,得到二次多项式回归方程预测模型。结果表明,采用复合增稠剂0.6%(黄原胶∶瓜尔豆胶∶羧甲基纤维素钠之比为4∶2∶3)、蔗糖脂肪酸酯0.10%、蒸馏单硬脂酸甘油酯0.04%组合成的稳定剂能有效提高红枣豆奶的稳定性,产品口感细腻,品质最佳。     

复合增稠剂在奶啤饮料中的应用研究

通过单因素试验、多因素正交试验研究复合增稠剂、乳化剂、增重剂等添加剂对凝固型酸奶及奶啤饮料稳定性的影响,确定出最优的复配增稠剂配方:CMC0.05%、黄原胶0.10%、蔗糖脂肪酸酯0.15%,以此复配增稠剂制作的奶啤饮料稳定性最佳。     

豆奶的乳化与增稠

本文测定了不同HLB值的混合乳化剂和几种稳定增稠剂对豆奶的稳定效果,并通过正交实验得到了最适工艺条件。结果表明:当HLB=11～13时乳化剂的效果较好。黄原胶的效果优于其它增稠剂,使用量约为0.05％。豆奶的粘度与稳定性无正比关系。添加0.04％黄原胶和0.05％海藻酸钠的豆奶,在pH6.5、121℃灭菌15min条件下能满足3个月的货架期要求。     

板栗花生乳的研制

以板栗、花生为主要原料,添加适量的增稠剂、乳化剂及其他辅料,对板栗花生奶的生产工艺和配方进行了研究。结果表明:添加板栗浆10%、花生乳25%、白砂糖10%、pH调整为4.5、复合增稠剂0.15%、复合乳化剂0.15%为最佳配方。该产品色泽均匀稳定,酸甜适口,细腻润滑。     

调配型豆乳稳定性的研究

以经过适度酶解的SPI(大豆分离蛋白)为原料生产的一种新型豆乳。本文着重叙述了加油量、增稠剂、乳化剂对豆乳稳定性的影响。结果表明,配方为4%SPI、加油量为2.0%、乳化剂总量为0.15%、增稠剂为0.13%的豆乳,稳定性最好,预计其保存期在3个月以上。     

南瓜豆奶饮料的研制

以南瓜汁、豆奶为主要原料，配以甜味剂、稳定剂、豆奶香精等，经调配、均质、杀菌等处理，制成一种色泽橙黄、气味芳香、酸甜适口、营养丰富的南瓜豆奶复合饮料。采用“正交试验”分析法，以感官评分为标准，确定了产品的配方；以稳定性为标准，确定了乳化剂、稳定剂的配比。     

椰奶菠萝复合饮料的研制

以新鲜椰奶和菠萝汁为主要原料,配制椰奶菠萝复合饮料,通过单因素试验和Box-响应面试验,对复合饮料的配方和乳化稳定条件进行了优化研究。结果表明:复合饮料的最佳配方为椰奶菠萝汁体积比值0.44、蔗糖添加量7.01%、柠檬酸添加量0.14%;乳化剂的最佳组成为蔗糖酯用量0.054%、单硬脂酸甘油酯用量0.129%、吐温-80用量0.055%;增稠剂CMC-Na的最佳用量为0.3%。在此条件下,制备出的椰奶菠萝果汁复合饮料口感适宜、稳定性良好。     

核桃酱生产工艺及稳定性的研究

介绍了核桃酱的生产工艺 ,同时研究了增稠剂与不同HLB值的乳化剂复合使用时 ,对核桃酱品质及稳定性的影响。研究结果表明 ,黄原胶在核桃酱中不仅有提高增稠作用 ,同时还有乳化稳定作用 ,其使用量为 0 .4 % ;乳化剂用量为 0 .3% ,HLB值应大于 9较理想。     

软包装即食湿面配方优化研究

通过正交试验极差分析和方差分析，确定用高筋粉生产即食湿面的最佳配方，并探讨了乳化剂、增稠剂、品质改良剂、微生物转谷氨酰胺酶、复合保鲜剂等对面条品质和贮藏效果的影响。所得的最佳配方为（％）：面粉100，水32．34，食盐2，复合碱0．2，乳化剂0．15，复合增稠剂0．25，品质改良剂0．2，复合保鲜剂0．1。     

Reliable identification of grapevine rootstock varieties using RAPD PCR on woody samples

Since grapevine ( Vitis spp .) rootstock material is being traded increasingly as disbudded woody material a lack of distinctive morphological features on such material necessitates an alternative and reliable means of identification. Methods described here were developed for rapid and efficient extraction of DNA from woody samples rich in phenolic compounds and polysaccharides, and for subsequent identification of varieties by RAPD PCR. Using these methods, and with the application of only one selected RAPD primer, we were able to differentiate sixteen rootstock varieties, including the seven varieties most commonly used in Germany. Problems commonly encountered with reproducibility of RAPD patterns were avoided by choosing primers with a dinucleotide sequence and a high G/C content that allowed a rather high annealing temperature of 45°C. Methods described here should also be useful for other horticultural crops, especially those with woody tissues rich in phenolic compounds and polysaccharides.     

Aroma characterization of various apricot varieties using headspace–solid phase microextraction combined with gas chromatography–mass spectrometry and gas chromatography–olfactometry

The characterization of the aromatic profile of several apricot cultivars with molecular tracers in order to obtain objective data concerning the aromatic quality of this fruit was undertaken using headspace–solid phase microextraction (HS–SPME). Six apricot cultivars were selected according to their organoleptic characteristics: Iranien, Orangered, Goldrich, Hargrand, Rouge du Roussillon and A4025. The aromatic intensity of these varieties measured by HS–SPME–Olfactometry were defined and classified according to the presence and the intensity of grassy, fruity and apricot like notes. In the six varieties, 23 common volatile compounds were identified by HS–SPME–GC–MS. Finally, 10 compounds, ethyl acetate, hexyl acetate, limonene, β-cyclocitral, γ-decalactone, 6-methyl-5-hepten-2-one, linalool, β-ionone, menthone and (E)-hexen-2-al were recognized by HS–SPME–GC–O as responsible of the aromatic notes involved in apricot aroma and considered as molecular tracers of apricot aromatic quality which could be utilized to discriminate apricot varieties.     

Tests of potential functional barriers for laminated multilayer food packages. Part I: Low molecular weight permeants

The advent of the functional barrier concept in food packaging has brought with it a requirement for fast tests of permeation through potential barrier materials. In such tests it would be convenient for both foodstuffs and materials below the functional barrier (sub-barrier materials) to be represented by standard simulants. By means of inverse gas chromatography, liquid paraffin spiked with appropriate permeants was considered as a potential simulant of sub-barrier materials based on polypropylene (PP) or similar polyolefins. Experiments were performed to characterize the kinetics of the permeation of low molecular weight model permeants (octene, toluene and isopropanol) from liquid paraffin, through a surrogate potential functional barrier (25 μm-thick oriented PP) into the food simulants olive oil and 3% (w/v) acetic acid. These permeation results were interpreted in terms of three permeation kinetic models regarding the solubility of a particular model permeant in the post-barrier medium (i.e. the food simulant). The results obtained justify the development and evaluation of liquid sub-barrier simulants that would allow flexible yet rigorous testing of new laminated multilayer packaging materials.     

Analysis of benzo[a]pyrene in spiked fatty foods by second derivative synchronous spectrofluorimetry after microwave-assisted treatment of samples

A simple, rapid and inexpensive method has been developed for the determination of benzo[a     

The development of reference materials for paralytic shellfish poisoning toxins in lyophilized mussel. II: Certification study

This paper describes the second part of a project undertaken to develop certified mussel reference materials for paralytic shellfish poisoning toxins. In the first part two interlaboratory studies were undertaken to investigate the performance of the analytical methodology for several PSP toxins, in particular saxitoxin and decarbamoyl-saxitoxin in lyophilized mussels, and to set criteria for the acceptance of results to be applied during the certification exercise. Fifteen laboratories participated in this certification study and were asked to measure saxitoxin and decarbamoyl-saxitoxin in rehydrated lyophilized mussel material and in a saxitoxin-enriched mussel material. The participants were allowed to use a method of their choice but with an extraction procedure to be strictly followed. The study included extra experiments to verify the detection limits for both saxitoxin and decarbamoyl-saxitoxin. Most participants (13 of 15) were able to meet all the criteria set for the certification study. Results for saxitoxin.2HCl yielded a certified mass fraction of <0.07 mg/kg in the rehydrated lyophilized mussels. Results obtained for decarbamoyl-saxitoxin.2HCl yielded a certified mass fraction of 1.59+/-0.20 mg/kg. The results for saxitoxin.2HCl in enriched blank mussel yielded a certified mass fraction of 0.48 +/- 0.06 mg/kg. These certified reference materials for paralytic shellfish poisoning toxins in lyophilized mussel material are the first available for laboratories to test their method for accuracy and performance.     

Announcing a new international peer-reviewed journal:Food Science and Human Wellness now accepting manuscript submission in English

<正>We are pleased to announce the launch of a new international peer-reviewed journal-Food Science and Human Wellness,ISSN 2213-4530,which is an open access journal,produced and hosted by Elsevier B.V.on behalf of Beijing Academy of Food Sciences.Food Science and Human Wellness is an international peer-reviewed English journal that provides a forum for the dissemination of the     

Chinese CTP Market

According to Printing and Printing Equipment Industries Association of China（PEIAC）＇s statistics to the plate manufucturer in China, in 2013, the actual offset plate production has reached 346 million square meters in China. Among them, the CTP production volume was 245 million square meters, up by 11% than that of last year; the total sales of the CTP plate was 239 million square meters, up by 13%.     

Qingshan Paper Intended to Increase Raised Fund RMB 1.3 Billion to Build Dissolving Wood Pulp Production Base

On April 25th, 2014, Guangdong Guanhao High -Tech Co., Ltd. held the trial production ceremony of the specialty paper and coated paper industry base project （first phase） at the base paper production plant of Donghai Island m     

Two Bag Manufacturers in China Invested by OJI Group Officially Put into Operation

正In September 2013,OJI(Qingdao)Bag Manufacture Co.Ltd.and Wuhan South OJI Packing Co.Ltd.invested by OJI Group in China have put into operation in succession,and the opening ceremony was held on September 4th and 5th respectively.