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1.
发酵技术生产的椰果,即微生物纤维素,是纤维素在自然界存在的一种形式,很久以前就用于食品制造。椰果的原料天然、生物合成过程温和、最终产物绿色,具有高持水量、高湿态,柔韧性、高原位反应活性等优异性能。在综述30多年来世界上微生物纤维素发酵制备技术的基础上,提出我国椰果发酵产业今后的发展方向。  相似文献   

2.
醋酸菌发酵法缩短椰果生产周期技术研究   总被引:1,自引:0,他引:1  
椰果是利用醋酸菌发酵制成的一种纤维多糖。作为一种新型产品,其生产规模较小。要提高椰果出品率,缩短凝固成型周期是关键。在椰果生产中,基础培养基的组分与其生产周期密切相关。通过研究发酵基础培养基中各组分对椰果生产周期的影响,得到醋酸发酵法缩短椰果凝固成型的最佳发酵基础培养基配方为:蔗糖45g/kg,(NH4)2SO44g/kg,MgSO40.2g/kg,KH2PO42g/kg,琼脂0.33g/kg,NaAc1.33g/kg,FeSO40.005g/kg,C2H5OH0.05g/kg,死菌液10g/kg,pH=4.0。在此基础上,进一步研究了菠萝水与椰子水混合配比(体积比)对椰果生产周期、品质及经济性的影响,综合考虑后确定菠萝水与椰子水的比例为6∶1。利用优选出的培养基进行发酵,大大缩短了椰果成型周期。  相似文献   

3.
为了提高高纤椰果发酵产量,在浅层静态发酵过程中尝试加载超声波,研究了超声波处理条件对高纤椰果发酵的影响。结果表明,适宜的超声波处理条件对高纤椰果发酵有促进作用,利用超声波(400 W,28 kHz)从发酵48h开始进行处理,每次处理时间为180 s,每隔1.5 h处理1次,发酵240 h,纤维素干重可达到1.88 g,比空白实验提高了20.5%。  相似文献   

4.
木醋杆菌利用酵母发酵滤液产高纤椰果的研究   总被引:2,自引:0,他引:2  
利用酵母与醋酸菌的共生关系,以酵母发酵滤液为培养基进行木醋杆菌的高纤椰果发酵,对影响因素进行了初步研究。结果表明,主要影响因素是酵母发酵液的乙醇浓度与滤液培养基的初始pH值,当酵母发酵14h、乙醇浓度为2.0%(vol)时,发酵滤液可作为木醋杆菌的适宜发酵培养基,适宜的初始pH值为6.0,此时高纤椰果产量达到最高,干纤维素产出水平可达17.48g/L,比参照培养基初始pH4.5时的产出水平提高了37.3%。因此,酵母发酵滤液培养基对高纤椰果发酵产量的提高具有促进作用。  相似文献   

5.
椰果研究与利用现状及进展   总被引:1,自引:0,他引:1  
椰果(Nata de Coco)是以椰子法为主要原料,经由醋酸杆菌(Acetobacter)进行生物培养、发酵而成的一种具有独特凝胶结构的细菌纤维素.本文综述了生产过程中影响椰果产率的因素及椰果的物理化学特性、加工特性和功能特性,并提出该产品今后的发展方向.  相似文献   

6.
奶茶大小事     
跳高比赛1.实力分析:奶茶体重:5.2公斤年龄:4岁手脚圆润、肚肚肥美椰果体重:4.8公斤年龄:1岁手脚有力、肚肚有一点分析结果:椰果胜2.奶茶第一跳:ZOcrn 3.奶茶第二跳:仗翔11奶茶:“呵呵,我这样很厉害了吧”4.椰果暖身运动中。椰果:“我要跳了!”5.椰果第一跳。椰果:“啊呀!怎么会这样!’‘6.椰果:“刚才我只是一时失误,我现在认真跳唉!”12仅翔。椰果胜’,月...尸,..,尸奶茶保龄球的打法,.我今天要给大家示范的是“奶茶’‘保龄球的打法。2.首先,观察地形‘测测风向’3.然后,只要找到目标,冲过去就可以了。椰果:‘冲啊,’,奶茶:…  相似文献   

7.
红曲椰果液态发酵工艺条件的优化   总被引:3,自引:0,他引:3  
对红曲椰果液态发酵条件进行了研究,结果表明,产莫纳可林K的最佳条件为:马铃薯15%、葡萄糖5%、NaNO3 0.2%、MgSO4 0.1%、ZnSO4 0.1%、pH为6.0、于26℃发酵13d,得到莫纳可林K为152,00mg/L,色价为128.38μ/g干红曲椰果的红曲椰果。  相似文献   

8.
本文研究了椰果酸奶及其生产方法.通过发酵试验和感官评定对菌种的选用、物料配比和糖添加量等都进行了优化,得到了最佳的椰果酸奶配方.  相似文献   

9.
本文研究了椰果酸奶及其生产方法。通过发酵试验和感官评定对菌种的选用、物料配比和糖添加量等都进行了优化,得到了最佳的椰果酸奶配方。  相似文献   

10.
以西瓜、椰果粒、全脂乳粉为主要原料,加入乳酸菌进行发酵,研制西瓜椰果粒酸奶并对其抗氧化性进行研究。以感官评分为指标,通过单因素试验和正交试验得到西瓜椰果粒酸奶的最佳生产工艺组合为:西瓜汁添加量20%、椰果粒添加量20%、蔗糖添加量6%、发酵剂接种量6%。按照最佳工艺条件生产出的西瓜椰果粒酸奶感官评分最高,呈淡红色,组织细腻均一,口感清凉舒爽,富有嚼劲,酸甜可口,同时具有西瓜和椰果的特殊风味。与未添加西瓜和椰果粒的酸奶相比,其抗氧化能力明显提高。  相似文献   

11.
ABSTRACT: The physicochemical, textural, and quality characteristics of Chinese-style meatball (20% fat) containing varying levels of bacterial cellulose (nata) were evaluated. Cooking losses of nata-containing Chinese-style meatballs were higher than those of control (containing no nata and 20% fat [C20]). Raw nata-added batter had higher water-holding capacity than control, but the pattern was reversed after cooking. N10 (10% nata) and C20 had the highest springiness scores. Textural hardness and shear-force value were significantly higher for C20, but both attributes for nata-added treatments decreased with increasing nata levels. Addition of 10% nata to Chinese-style meatballs produced products with acceptable textural and sensory qualities. Nata showed potential as a functional ingredient in Chinese-style emulsified meat products such as Chinese-style meatballs.  相似文献   

12.
Nata is white gelatinous bacterial cellulose produced by Acetobacter aceti ssp. xylinum through fermentation of coconut water. Drying behaviour of nata de coco was conducted with a hot air dryer for a temperature range of 50–90 °C. The experimental data obtained were fitted into seven empirical and/or semi‐theoretical thin‐layer drying models using nonlinear regression analysis. Results showed that Logarithmic model, Wang and Singh model fitted better than Verma et al. model although all these three models were suitable for predicting the drying process of nata de coco. The rehydration capacity was lost severely when the moisture content of the samples was nearly zero, but it can almost rehydrate to its initial state when the moisture content was above 8%. The drying kinetic properties and rehydration capacity of nata de coco indicated that most of the moisture in nata de coco was free water.  相似文献   

13.
The physicochemical and sensory characteristics of pork frankfurters containing different levels (10% to 30%) of bacterial cellulose (nata) were evaluated. Emulsion stability of the raw meat batter decreased with the addition of nata. For nata‐added treatments, increasing levels of nata in frankfurters resulted in decreased textural hardness and shear values. Sensory results indicated that N10 and N20 had significantly higher firmness scores than N30 and control. However, juiciness score did not differ for all treatments. Incorporation of nata at lower levels (10% to 20%) did not have detrimental effects on the physicochemical, textural, sensory, and microbiological properties of regular‐fat frankfurters. Addition of a higher level (30%) of nata essentially produced comparable sensory properties to the control, but lower levels of nata in frankfurters yielded higher sensory firmness and instrumental hardness values. Based on the composite results, manufacture of regular‐fat frankfurter containing 10% to 20% high‐fiber nata resulted in product quality comparable to the control.  相似文献   

14.
Nata, a bacterial cellulose produced by Acetobacter aceti ssp. xylinum , was colored by means of fermentation with Monascus purpureus. Scanning electron microscopy (SEM) observations showed that the Monascus mycelium could grow through the cellulose network of nata. Rice powder as a major carbon source and monosodium glutamate (MSG) as a nitrogen source gave an appealing coloration after 12 d of fermentation at 30 °C. Compared to dyed nata, the color of the Monascus -nata complex had better resistance to washing, heat, freezing, acidification, and alkalization. A 66.1% decolorization was found under irradiation with 366 nm ultraviolet light after 36 h. The Monascus -nata complex has the potential to be a new vegetarian foodstuff.  相似文献   

15.
Summary The effects of pH (2, 7 and 10), NaCl concentrations (0, 1, 3 and 5% w/w), and temperatures (−20, 25 and 100 °C) on the physical properties of nata, a bacteria cellulose produced by Acetobacter aceti ssp. xylinum , were evaluated in this study. The addition of NaCl was found to increase the hardness of nata but to decrease the water-holding capacity; however, no effect of NaCl on the hardness of nata was found when nata was acidified or alkalized. Compared to the texture properties of nata at 25 °C, freezing at −20 °C for 24 h gave a more elastic texture, but heating at 100 °C for 3 h had no significant effect on the textural properties. The results of this study indicated that acidification or alkalization was necessary to prepare salted nata products without increasing their hardness.  相似文献   

16.
椰子纳塔发酵条件研究   总被引:17,自引:2,他引:15  
研究了一株醋酸杆菌(Acetobactersp.)在椰子水培养液中发酵产生纳塔(nata)的适宜工艺条件:蔗糖7%,NH4Cl0.4%,KH2PO40.2%,MgSO40.02%,CaCl20.02%,FeSO40.0005%(W/V),酵母膏0.05%,柠檬酸0.02%,椰子水50%~100%(V/V),pH4.0,用大口容器盛装,30℃静置培养14~18d。在此条件下,于500ml烧杯中发酵16d,最高可收获182g重,3.3cm厚的纳塔,其外观和品质均符合纳塔食品的加工要求。  相似文献   

17.
通过单因素及响应面试验探讨羧甲基纤维素钠(CMC)真空渗透条件和热风干燥条件对椰纤果的复水性、复水后的质构等的影响。结果表明:采用CMC真空渗透处理可以改善干椰纤果的复水比、复水后的硬度和弹性。影响干椰纤果复水性质的因素主要是CMC质量分数、固液比、干燥温度、真空渗透时间,干椰纤果制备的最佳工艺条件为:CMC质量分数0.90%、固液比1:2、真空渗透时间4.5h、干燥温度60℃。  相似文献   

18.
超声波促进水酶法提取红花籽油工艺研究   总被引:3,自引:0,他引:3  
通过超声波促进水酶法提取红花籽油,研究超声波功率、料液比、纤维素酶添加量、胰蛋白酶添加量、纤维素酶酶解时间及胰蛋白酶酶解时间对红花籽油得率影响。经单因素试验和正交试验优化,得出最优提取工艺为:料液比1∶6、超声波功率120 W、纤维素酶添加量150 U/g、胰蛋白酶添加量100 U/g、纤维素酶酶解时间5 h、胰蛋白酶酶解时间3 h;在此条件下,红花籽油得率可达86.74%。  相似文献   

19.
以离子液体1-丁基-3-甲基咪唑氯盐([BMIM]Cl)为溶剂,溶解棉浆粕得到均匀透明的纤维素溶液,采用湿法工艺制备纤维素薄膜,并研究了凝固浴浓度对纤维素薄膜微孔结构和力学性能的影响。结果表明,选用质量分数为20%的离子液体水溶液作凝固浴可得到具有一定强度的均匀透明的纤维素薄膜。  相似文献   

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