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《武汉生物工程学院学报》2015,(2)
以苦荞麦和菠萝为原料,研究了苦荞麦的浸提工艺和苦荞麦菠萝复合饮料的工艺,得出了苦荞麦的最佳浸提工艺:浸提时间30 min,浸提温度90℃,料水比为1:15;苦荞麦菠萝复合饮料的最佳工艺:苦荞麦浸提液和菠萝汁比值为1:1,白砂糖的添加量为4%,卡拉胶的添加量为0.2%,在最佳工艺下苦荞麦菠萝复合饮料色泽鲜亮、透明呈淡黄色,具有苦荞麦和菠萝的香气,口感柔和浓郁,汁液均匀,无沉淀,透明度高。 相似文献
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火龙果不但营养丰富而且具有一定的保健功能。本试验以新鲜的红皮白肉型火龙果果实的榨汁为原料,分别对发酵工艺条件、蔗糖添加量、柠檬酸用量、稳定剂用量等条件进行了研究,通过单因素试验和正交试验,得到火龙果汁发酵饮料的最佳工艺配方。采用该工艺配方制备的发酵饮料澄清透明,具有清新的果香和淡淡的醇香,酸甜可口,口感顺滑。 相似文献
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以全脂乳粉、火麻仁为原料,探讨了火麻仁复合蛋白饮料的制备工艺条件。通过正交试验研究了火麻仁复合蛋白饮料产品配方及乳化稳定剂的复配方案。结果表明:火麻仁复合蛋白饮料最佳配方为全脂乳粉2.0%、火麻仁3.0%、核桃仁1.0%、白砂糖6.0%;火麻仁复合蛋白饮料最佳稳定剂为单,双甘油脂肪酸酯0.04%、蔗糖脂肪酸酯0.05%、山梨醇酐单硬脂酸酯0.02%、结冷胶0.03%。 相似文献
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Carotenoid production by Xanthophyllomyces dendrorhous: use of pineapple juice as a production medium 总被引:1,自引:0,他引:1
Jirasripongpun K Pewlong W Kitraksa P Krudngern C 《Letters in applied microbiology》2008,47(2):112-116
Aims: To select a carotenoid-hyperproducing mutant and to formulate pineapple juice as a carotenoid production medium.
Methods and Results: Yeast strain of Xanthophyllomyces dendrorhous mutant GM 807 (derived from gamma irradiation) and the mutant n78 (from neutron irradiation) were selected based on higher carotenoid production in diluted pineapple juice as a medium. The selected strain was evaluated under various concentrations of pineapple juice. The results obtained in the study demonstrate that the mutant GM 807 enhanced production by 65·8% when using pineapple juice as medium at 10% dilution in place of yeast malt medium.
Conclusion: Pineapple juice could be used as a sole medium for carotenoid production.
Significance and Impact of the Study: Our results provide useful information for the design of production media for carotenoids to be used in various applications. 相似文献
Methods and Results: Yeast strain of Xanthophyllomyces dendrorhous mutant GM 807 (derived from gamma irradiation) and the mutant n78 (from neutron irradiation) were selected based on higher carotenoid production in diluted pineapple juice as a medium. The selected strain was evaluated under various concentrations of pineapple juice. The results obtained in the study demonstrate that the mutant GM 807 enhanced production by 65·8% when using pineapple juice as medium at 10% dilution in place of yeast malt medium.
Conclusion: Pineapple juice could be used as a sole medium for carotenoid production.
Significance and Impact of the Study: Our results provide useful information for the design of production media for carotenoids to be used in various applications. 相似文献
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Hidaka M Nagata M Kawano Y Sekiya H Kai H Yamasaki K Okumura M Arimori K 《Bioscience, biotechnology, and biochemistry》2008,72(2):406-411
There is limited information on the effect of fruits on human cytochrome P450 (CYP) 2C9 activity. The objective of this study was to determine the effect of fruit juice on CYP2C9-mediated drug metabolism. Nine citrus fruits and eight tropical fruits were chosen. We investigated effects of the fruits on diclofenac 4'-hydroxylation and tolbutamide hydroxylation by human liver microsomes. Among the fruits, pineapple juice showed potent inhibition of CYP2C9 activity. The addition of 25 microl (5.0% v/v) of pineapple juice resulted in almost complete inhibition. Next we examined the inhibitory effect of bromelain, a cysteine protease in pineapple. Bromelain also strongly inhibited CYP2C9 activity. In addition, E-64, a cysteine protease inhibitor, almost entirely blocked inhibition by pineapple juice and bromelain. Thus we found that pineapple juice was a potent inhibitor of CYP2C9, and that the inhibitory effect might be due to the bromelain contained in pineapple. 相似文献
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Csar M. A. Correa Anderson Puker Marco A. Lara Cassiano S. Rosa Vanesca Korasaki 《Entomological Science》2019,22(4):365-372
The lack of a standardized protocol to efficiently capture flower chafer beetles (Coleoptera: Scarabaeoidea: Cetoniinae) in the wild limits studies regarding the ecology of the group, as well as systematic collections seeking species surveys for taxonomic studies, especially in the Neotropical region. We investigate the efficiency of different baits to capture flower chafer beetles in the Brazilian Cerrado: (i) banana; (ii) banana + sugarcane juice; (iii) pineapple; (iv) pineapple + sugarcane juice; (v) sugarcane juice; or (vi) water (control). From January to December 2014, we sampled these beetles using a typical aerial fruit‐baited trap, every 15 days in ten sites of Brazilian Cerrado, in Aquidauana, Mato Grosso do Sul, Brazil. Traps baited with banana + sugarcane juice, pineapple + sugarcane juice and sugarcane juice alone sampled the greatest species richness and abundance of flower chafer beetles when compared to the other baits used. Our results indicated the importance of sugarcane juice, either used in isolation or as a coadjutant in the fermentation process of the tested fruits for efficient sampling of flower chafer beetle biodiversity. Finally, studies that investigate the addition of other substances in the fermentation process of the fruits, as well as the attractiveness of other native or exotic fruits that are widely distributed in the Neotropical region, can advance our knowledge of sampling of these beetles. 相似文献
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Adults of the papaya fruit fly, Toxotrypana curvicauda Gerstaecker, living in wild vegetation in Yautepec, Morelos, Mexico, were captured using McPhail traps baited with pineapple juice or brown sugar. Maximum capture peaks occurred during August and November in the afternoon. Baits were most effective when aged over a 4-d period. Traps baited with brown sugar captured the highest number of adults, and both baits were more attractive to females than males. Potential use of these baits for pest management and research is discussed, considering that this is the first report of pineapple juice being attractive to the papaya fruit fly. 相似文献
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An easy procedure for cell free biotransformation of pineapple juice sugars into dietetic derivatives was accomplished using a commercial invertase and an oxidoreductase from Zymomonas mobilis. First, pineapple juice sucrose was quantitatively converted into glucose and fructose by invertase, thus increasing the concentration of each monosaccharide in the original juice to almost twice. In a second step, glucose-fructose oxidoreductase (GFOR) transformed glucose into gluconolactone, and fructose into the low calorie sweetener sorbitol. The advantage of using GFOR is simultaneous reduction of fructose and oxidation of glucose, allowing the continuous regeneration of the essential coenzyme NADP(H), that is tightly bound to the enzyme. The yield of GFOR catalyzed sugar conversion depends on initial pH and control of pH during the reaction. At optimal conditions (pH control at 6.2) a maximum of 80% (w/v) sugar conversion was obtained. Without pH control, GFOR is inactivated rapidly due to gluconic acid formation. Therefore, conversion yields are relatively low at the natural pH of pineapple juice. The application of this process might be more advantageous on juices of other tropical fruits (papaya, jackfruit, mango) due to their naturally given higher pH. 相似文献
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K. C. Richardson 《Biotechnology and bioengineering》1967,9(2):171-186
Submerged acetification experiments were performed to determine conditions necessary for the production of a satisfactory vinegar from waste pineapple juice using a pure culture inoculum. Vinegars containing up to 7%, by weight of acetic acid could be produced in less than 24 hr. with a conversion efficiency greater than 90% in both laboratory and pilot plant equipment. None of the bacterial nutrients added to the juice improved either the rate of production or the yield of acetic acid. Oxygen transfer during the process is discussed. 相似文献
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Inadequate intake of the recommended five-a-day fruit and vegetable portions might contribute to increased cardiovascular disease risk. We assessed the effects of dietary intake of a blackcurrant juice drink, rich in vitamin C and polyphenols, on oxidative stress and vascular function. This was a double-blind, placebo-controlled, parallel group study of 66 healthy adults who habitually consume <2 portions of fruit and vegetables per day. Participants were randomly allocated to consume 250 ml of placebo (flavored water) or low or high blackcurrant juice drink four times a day for 6 weeks. Flow-mediated dilation (FMD) and plasma concentrations of F2-isoprostanes and vitamin C were measured. In the high blackcurrant juice drink group FMD increased significantly (5.8±3.1 to 6.9±3.1%, P=0.022) compared with the placebo group (6.0±2.2 to 5.1±2.4%). Plasma vitamin C concentration increased significantly in the low (38.6±17.6 to 49.4±21.0 µmol/L, P<0.001) and high (34.6±20.4 to 73.8±23.3 µmol/L, P<0.001) blackcurrant juice drink groups compared with the placebo group (38.1±21.0 to 29.0±17.6 µmol/L). F2-isoprostane concentrations were significantly lower in the high blackcurrant juice drink group (225±64 pg/ml) compared with the low blackcurrant juice drink (257±69 pg/ml, P=0.002) and placebo group (254±59 pg/ml, P=0.003). At follow-up, changes in plasma vitamin C correlated significantly with changes in FMD (r=0.308, P=0.044). Consumption of blackcurrant juice drink high in vitamin C and polyphenols can decrease oxidative stress and improve vascular health in individuals with habitually low dietary fruit and vegetable intake. 相似文献
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Vianey Marín‐Cevada Jesús Caballero‐Mellado Rocío Bustillos‐Cristales Jesús Muñoz‐Rojas Miguel A. Mascarúa‐Esparza Miguel Castañeda‐Lucio Lucía López‐Reyes Lourdes Martínez‐Aguilar Luis E. Fuentes‐Ramírez 《Journal of Phytopathology》2010,158(2):93-99
Pink disease is a major problem in the pineapple canning industry. Affected fruit acquire a brownish pigment after pasteurization and can contaminate non‐affected fruit before they are released to the consumer. In the last few years, Pantoea citrea has been described as the causative agent of pink disease. In this study, over 300 bacterial isolates from pineapple plants, growing in Mexican commercial fields, and from soil close to plant roots were recovered. Over 250 isolates showed a very high similarity in their phenotypic and genotypic traits with Tatumella ptyseos, a close relative of Pantoea. These isolates exhibited typical pathogenicity reactions in pineapple juice tests, pineapple slices and fruit. On this basis, molecular identification procedures for the Tatumella isolates associated with pink disease were implemented. In affected fruit populations around 106 CFU/g of fresh tissue were recovered. This is first time that T. ptyseos is demonstrated as a causal agent of pink disease. 相似文献
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Tokitomo Y Steinhaus M Büttner A Schieberle P 《Bioscience, biotechnology, and biochemistry》2005,69(7):1323-1330
By application of aroma extract dilution analysis (AEDA) to an aroma distillate prepared from fresh pineapple using solvent-assisted flavor evaporation (SAFE), 29 odor-active compounds were detected in the flavor dilution (FD) factor range of 2 to 4,096. Quantitative measurements performed by stable isotope dilution assays (SIDA) and a calculation of odor activity values (OAVs) of 12 selected odorants revealed the following compounds as key odorants in fresh pineapple flavor: 4-hydroxy-2,5-dimethyl-3(2H)-furanone (HDF; sweet, pineapple-like, caramel-like), ethyl 2-methylpropanoate (fruity), ethyl 2-methylbutanoate (fruity) followed by methyl 2-methylbutanoate (fruity, apple-like) and 1-(E,Z)-3,5-undecatriene (fresh, pineapple-like). A mixture of these 12 odorants in concentrations equal to those in the fresh pineapple resulted in an odor profile similar to that of the fresh juice. Furthermore, the results of omission tests using the model mixture showed that HDF and ethyl 2-methylbutanoate are character impact odorants in fresh pineapple. 相似文献
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Berry extracts possess antioxidant activity in cell free systems, whereas cell culture and animal experimental systems have produced mixed outcomes. Our aim was to investigate the effects of blackcurrant juice and specifically blackcurrant anthocyanins on the steady state level of oxidative DNA damage in mononuclear blood cells (MNBC) of humans, determined as strand breaks (SB) as well as endonuclease III (Endo III) and formamidopyrimidine DNA glycosylase (Fpg) sensitive sites by the comet assay. Fifty-seven healthy humans completed a 3-week controlled parallel intervention study with three groups randomized to supplementation with blackcurrant juice, anthocyanin drink, or a control drink. The daily doses ranged from 475 to 1000ml/d according to body weight (mean anthocyanin intakes in blackcurrant juice and anthocyanin drink groups were 397 and 365g/d, respectively) and they were ingested during three daily meals while all volunteers were on the same strictly controlled low-flavonoid diet. Fasting venous blood samples were obtained at baseline and after 3-week of supplementation. The baseline level of oxidative DNA damage was low (e.g. less than 200 Fpg lesions per diploid cell). Fpg sensitive sites increased during the intervention within the blackcurrant juice group, whereas there were no differences between treatments in any of the DNA damage markers. In conclusion, this study shows that even large amounts of dietary antioxidants did not decrease the already low steady state levels of oxidative DNA damage in healthy adequately nourished humans. 相似文献