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可可悬浮体屈服应力的测量与研究 总被引:1,自引:0,他引:1
可可悬浮体的屈服应力是影响巧克力食品加工过程的重要流变特性。本文以叶片法和流动曲线外推法测定了可可悬浮体的屈服应力,发现前者比后者更为可靠准确,并且呈现屈服应力的可可粉临界体积分率约为0.40。由最大填充率与剪应力关系模型出发,进而研究了屈服应力与体积分率的模型,所得关系式可用于已知若干参数而预测不同体积分率下的屈服应力。 相似文献
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关于提高收购牛奶质量的几点建议 总被引:11,自引:0,他引:11
我国有奶牛500多万头,年产牛奶达650万余吨。国营牧场养牛只占10%左右,90%为一家一户分散饲养,每户养牛2~5头占90%以上,养50头以上的只占少数。机械榨奶牧场占极少数,90%以上的奶牛均采用人工榨奶。人工榨奶卫生环境较差,一般奶牛日榨奶2~... 相似文献
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Both wild (lowbush) blueberries (Vaccinium angustifolium Ait.) and soybeans (Glycine max L.) possess a variety of antioxidants, and both foods appear to have multiple health benefits. Our objectives were to identify whether wild blueberry juice concentrate was more acceptable than puree in frozen desserts with a soy milk‐tofu base; to determine whether fat‐free products were as acceptable as those with 10% added fat; and to compare several levels of blueberry juice concentrate. Four frozen dessert formulations were prepared in duplicate from soy milk, silken tofu, sucrose, stabilizer, BJC or puree, soybean oil or polydextrose, sweetened dried blueberries, salt, and lemon juice. Samples were assayed for total anthocyanins, antioxidant activity using the DPPH method, color, overrun, and solids. Fifty‐five persons evaluated the samples using a 9‐point hedonic scale for color, flavor, texture, and overall acceptability. Samples containing blueberry juice concentrate were darker and less blue. Anthocyanin levels were highest in the puree sample and the fat‐free product with 7.8% blueberry juice concentrate. However, antioxidant activity was highest (28 Trolox equivalents per gram) in the samples made with soybean oil and 7.4% blueberry juice concentrate. The puree formulation received higher hedonic scores than did the low‐fat blueberry juice concentrate formulations. The puree formulation received overall acceptability scores of like very much or like extremely by 45% of the consumers. These findings may aid processors in defining potential formulations that combine 2 healthful food ingredients. 相似文献
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最近国际上电视、杂志同时给予点心(Dessert)新的名称"Sweet",同时有各种点心的专辑,尤其是被称为"Patisseri"的名点心师傅,造成一阵风潮,无论超市或便利商店都有许多点心类商品,点心类的发源地及殿堂还是在欧洲,尤其是法国.在日本,便利商店亦积极扩充冷果类的架位,引入新产品,欧洲的超市,大型超市规模当然不是日本可以比得上的,其冷果类的展示架上有各式各样的点心类产品. 相似文献
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精品巧克力和甜品的生产工艺很复杂,成本也很昂贵.但由于多年来消费者对高级甜品需求有增无减的发展形势,吸引了越来越多的食品企业生产这些精品以满足日益增长的市场需求;同时,也带动了相关设备制造商对加工设备的不断创新和改良,位于意大利罗查诺的Carle&Montanari S.p.A公司就是其中的代表.…… 相似文献
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J. RUBEN ABRIL J. WARREN STULL RALPH R. TAYLOR ROBERT C. ANGUS TERRY C. DANIEL 《Journal of food science》1982,47(2):472-475
Combinations of xylitol, fructose and 24 DE corn syrup solids (CSS) were the sweetening agents in ice cream-type frozen desserts. A 23 factorial experimental design evaluated the most acceptable combinations of xylitol (4% or 6%), fructose (4% and 6%) and CSS (10% and 12%). Based on chemical, physical and sensory analyses of the eight experimental combinations it was demonstrated that a formulation involving 6% xylitol, 6% fructose and 10% CSS gave product acceptability similar to that of an ice cream with conventional ingredient array and composition. 相似文献
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MARK A. PIHL J. WARREN STULL RALPH R. TAYLOR ROBERT C. ANGUS TERRY C. DANIEL 《Journal of food science》1982,47(3):989-991
Combinations of fructose and lactose were used as the major sweetening agents in ice cream-type frozen dessert formulations. In addition to the sweeteners, variable amounts of caseinate were subjected to a 23 factorial experimental design in order to evaluate the most suitable combinations of lactose (4.5% or 5.5%), fructose (7.5% or 8.5%) and sodium caseinate (2% or 3%). Comparative chemical, physical and sensory analyses indicated that a formulation using 5.5% lactose, 8.5% fructose and 2% sodium caseinate gave product acceptability similar to that of an ice cream of standard ingredient array and composition. 相似文献
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Flávia C. A. Buriti Susana M. I. Saad 《Critical reviews in food science and nutrition》2014,54(2):139-150
Nowadays, food companies are endeavoring to differentiate their products through creative segmentation and positioning strategies based on superior functionality and quality. Some kinds of dairy desserts have shown a great market potential, as a function of consumers interested in healthier and functional products with fine taste and mouthfeel. In this context, chilled dairy desserts are emerging as attractive options for the incorporation of probiotic cultures and prebiotic ingredients, as seen in the previous launches from the food industry, as well as in the growing number of scientific studies dealing with this subject published in the last years. The main aspects involved in the development of probiotic and/or prebiotic dairy desserts for storage under refrigerated conditions are presented in this review. 相似文献
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Freezing points of solutions of polydextrose, polydextrose partially neutralized with potassium hydroxide, sorbitol, and microcrystalline cellulose at concentrations commonly used in frozen desserts were compared with those of similar concentrations of sucrose. Solutions of polydextrose and polydextrose partially neutralized with potassium hydroxide exhibited higher freezing points. Freezing points of sorbitol solutions were lower and microcrystalline cellulose had no measurable effect on freezing point. Most bulking agents affect freezing points; thus, addition to frozen dessert mixes must be regulated carefully. 相似文献
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Acceptance of Frozen Desserts Made with Concentrated,Decolorized, Deionized Hydrolyzed Whey Permeate
《Journal of dairy science》1986,69(5):1225-1231
Three separate batches of whey permeate from ultrafiltration of sweet cheese whey were deionized, treated with β-galactosidase to hydrolyze lactose, and concentrated. By varying the level of completion of these steps, by decolorizing the latter two batches, and by subjecting the last batch to a 75°C postpasteurization heat treatment, control of stability and flavor was increased.The concentrated, deionized, hydrolyzed whey permeate was divided into two lots, one of which was decolorized. The regular and decolorized permeates were then used in soft-serve ice milk, hardened ice milk, and milk shake mixes. Mixes were pasteurized at 77°C for 30 min and stored at 4°C. After freezing, each underwent organoleptic evaluation and comparison with a commercial brand.Products made with regular permeate yielded satisfactory results when used only at low levels. Products made with decolorized permeate yielded better overall results, although the products were criticized for being less sweet than controls.A concentrated, deionized, hydrolyzed whey permeate product developed for sweetener applications should be economical to produce and should be highly competitive with fructose and corn syrup sweeteners. 相似文献
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Prebiotic Low Sugar Chocolate Dairy Desserts: Physical and Optical Characteristics and Performance of PARAFAC and PCA Preference Map 下载免费PDF全文
E. C. Morais E. A. Esmerino R. A. Monteiro C. M. Pinheiro C. A. Nunes A.G. Cruz Helena M.A. Bolini 《Journal of food science》2016,81(1):S156-S164
The addition of prebiotic and sweeteners in chocolate dairy desserts opens up new opportunities to develop dairy desserts that besides having a lower calorie intake still has functional properties. In this study, prebiotic low sugar dairy desserts were evaluated by 120 consumers using a 9‐point hedonic scale, in relation to the attributes of appearance, aroma, flavor, texture, and overall liking. Internal preference map using parallel factor analysis (PARAFAC) and principal component analysis (PCA) was performed using the consumer data. In addition, physical (texture profile) and optical (instrumental color) analyses were also performed. Prebiotic dairy desserts containing sucrose and sucralose were equally liked by the consumers. These samples were characterized by firmness and gumminess, which can be considered drivers of liking by the consumers. Optimization of the prebiotic low sugar dessert formulation should take in account the choice of ingredients that contribute in a positive manner for these parameters. PARAFAC allowed the extraction of more relevant information in relation to PCA, demonstrating that consumer acceptance analysis can be evaluated by simultaneously considering several attributes. Multiple factor analysis reported Rv value of 0.964, suggesting excellent concordance for both methods. 相似文献