果蔬膳食纤维的应用

饮食结构过于精细化造成的最大问题是膳食纤维的缺乏,而膳食纤维作为人体必不可缺的营养素之一,其受重视程度也在不断提高。果蔬富含膳食纤维,而对于果蔬加工副产物中的膳食纤维进行提取应用,可以达到一举两得的效果。目前果蔬膳食纤维主要应用于加工食品,同时在其他方面的应用也值得研究与开发。本文总结了其在各方面的应用。     

利用菠萝渣制备高活性膳食纤维的工艺研究

以菠萝渣为原料,采用酸水解法制备水溶性膳食纤维和水不溶性膳食纤维.正交试验结果表明,提取水溶性膳食纤维的适宜条件为:温度80℃,pH值2.0,时间90min,原料:水=1:10,水溶性膳食纤维提取得率为1.10%(以湿渣计),制得成品色泽呈焦糖色,气味较好;水不溶性膳食纤维提取条件为:温度60℃,pH值2.0,时间60min,其得率为5.06%(以湿渣计),成品呈浅黄色,气味淡,其溶胀性高达7.00mL/g,持水力为757%.     

膳食纤维研究现状的问题分析及发展方向的预测

膳食纤维被称为"第七营养素",是过去几十年来的研究热点。本文参考近10年来的最新研究成果,总结了以往文献中关于膳食纤维研究现状存在的问题,并在此基础上提炼出对膳食纤维重点发展方向的预测,包括膳食纤维的定义、测定方法、摄入量和膳食纤维食品的应用前景及新型膳食纤维资源的开发。对膳食纤维的研究和开发提供借鉴作用。     

利用菠萝渣制备高活性膳食纤维的工艺研究

以菠萝渣为原料，采用酸水解法制备水溶性膳食纤维和水不溶性膳食纤维。正交试验结果表明，提取水溶性膳食纤维的适宜条件为：温度80℃，pH值2．0，时间90min，原料：水=1：10，水溶性膳食纤维提取得率为1．10％(以湿渣计)，制得成品色泽呈焦糖色，气味较好；水不溶性膳食纤维提取条件为：温度60℃，pH值2．0，时间60min，其得率为5．06％(以湿渣计)，成品呈浅黄色，气味淡，其溶胀性高达7．00mL／g，持水力为757％。     

食品中总膳食纤维的测定方法及改进措施研究

目前,食品膳食纤维的检测方法比较多,但每种检测方式都有其不足之处。基于此,本文分析两种食品中总膳食纤维的检测方法,同时阐述测定方法的改进措施。     

药食两用栀子果膳食纤维的制备及其在面制品中的应用

近年来,人们发现膳食纤维对糖尿病、肥胖症有较好的防治效果,而栀子果有较高的药用价值。因此,研究栀子果膳食纤维的制备及在面制品中的应用也必将成为以后的研究热点。本研究以栀子果壳膳食纤维为原料,通过单因素实验和正交试验对膳食纤维的提取工艺进行优化分析。结果表明,酶法和化学法制备膳食纤维,酶法所得的纤维得率略高于化学法。化学法最优制备工艺为pH 6,温度80℃,加热时间150 min,料液比1∶20,在此最佳膳食纤维制备工艺下,测得膳食纤维得率为13.91%。     

膳食纤维在食品加工中的应用与进展

近年来食品加工中膳食纤维的应用越来越广泛,对人们的身心健康产生了重要影响。鉴于此,本文首先对食品加工中膳食纤维的应用研究价值进行了深入分析,并在总结膳食纤维具体功能的基础上,深入探讨膳食纤维在食品加工中的应用,以供参考。     

膳食纤维——人类的健康卫士

膳食纤维是一种广泛存在于水果、蔬菜、谷类、豆类及其他水生植物中的物质。本文概述了膳食纤维的定义、分类及理化特性,列举分析了膳食纤维的生理特性及生理功效,介绍了膳食纤维检测方法的研究现状。     

膳食纤维与人体健康

膳食纤维是包含纤维素、半纤维素、木质素、果胶及可溶性多糖等多种成分的混合物,并被列为七大营养素之一.膳食纤维与人体健康密切相关,具有多种生理保健功能,缺乏膳食纤维会引发多种疾病,所以含有膳食纤维的制品被受消费者的青睐.     

从小麦麸中提取膳食纤维的工艺

介绍了小麦膳食纤维的物理生理功能及其应用,并对用现代生物工程技术从小麦麸中提取膳食纤维的研究作了说明     

薏米魔芋营养粉的制备及品质评价

薏米和魔芋对人体健康均有多种促进作用,为充分利用其营养价值,丰富市场上谷物蛋白与膳食纤维复合产品的种类,本试验以薏米与魔芋粉为主要原料,研制出薏米魔芋营养粉。通过单因素与正交试验,以感官评分为评价指标,确定最佳工艺参数与配方,配方为薏米粉55.8%、魔芋粉6.1%、红枣粉12.7%、木糖醇25.4%。     

糌粑中营养成分的测定

通过对糌粑营养成分进行测定,结果表明:糌粑中营养成分比较丰富,含有粗蛋白质10.23%,粗脂肪3.99%,粗纤维素为1.20%,总糖为6.88%;含有除色氨酸以外的人体所需的所有氨基酸,其必需氨基酸含量为4.673 8 mg/kg,总量为20.251 4 mg/kg;含有丰富的人体生命活动的矿物质元素,其中K、Mg、Ca、Na元素含量较为丰富,同时重金属Cd、Cr的含量按照食品重金属含量的相关标准严重超标。     

不同菌种发酵豆渣的营养及抗氧化特性分析

本文主要探析了不同菌种发酵豆渣的营养及抗氧化特性。结果表明,对比蒸煮豆渣以及发酵豆渣,发酵豆渣有增加的蛋白质以及减少了含有的脂肪,维持不变的就是粗纤维含量。米曲霉发酵进行到48 h时,对ABTS自由基清除活性最强。其余菌株发酵豆渣80%乙醇提取物清除DPPH自由基的能力在发酵进行到24 h时达到最高值,其中枯草芽孢杆菌最大达42%,比未发酵蒸煮豆渣提高40%。     

宁夏农业学校学生膳食营养状况调查与分析

为了解宁夏农业学校学生膳食营养状况,为制订切实可行的干预措施提供科学依据,采用自制问卷调查的方式,通过24小时膳食回顾法与食物频率法相结合的调查方法,了解学生日常饮食的具体情况。根据中国居民膳食营养指南,分析学生膳食营养情况,运用BMI值评估学生的体质状况。结果显示,与中国居民平衡膳食宝塔的推荐量相比,宁夏农业学校学生的膳食结构中蔬菜、水果、肉类、奶类摄入量过少,膳食的能量不足;三餐比例中早餐能量摄入过少;三大产能营养素功能比例基本适宜;学生体质状况良好。宁夏农业学校学生的饮食行为存在很多问题,需及时给予适当的膳食行为干预,以提高学生的营养健康水平。     

Toward an Integrated Model of Purchase Intention of Dietary Supplements in Sexually Oriented Advertising

This study was designed to examine antecedent factors that yielded a model of purchase intention of dietary supplements in sexually oriented advertising. Results suggested that sexual cognition, gender difference, individual attitude toward advertisements, and product involvement were yielded as key predictors toward people's purchase intention of dietary supplements. However, sexually oriented advertising did not considerably increase their purchase intention. A regression analysis also loaded sexual cognition and product involvement as two key determinants in the model of purchase intention of dietary supplements. Moreover, people with a more positive level of sexual cognition significantly resulted in their higher degree of purchase intention of dietary supplements.     

Dietary supplement advertising in the US

Dietary supplement advertising is an important, yet neglected, advertising research subject. This article overviews the US dietary supplement industry, describes advertising practices for dietary supplement products, and reviews the existing research on the topic. Based on the literature review, we offer a research agenda for advertising researchers around the world to stimulate and guide future investigations of dietary supplement advertising.     

Dietary Restraint and Consumer Consumption Intentions for Low‐Calorie Snacks

Much is still unknown regarding the reasons that drive consumer consumption intentions for low‐calorie snacks. This research investigates the impact of individuals with low vs. high dietary restraint inferences of low‐calorie snacks on their subsequent consumption intentions. We conducted a between‐subjects experiment in which we asked participants to indicate their consumption intentions and their hedonic and utilitarian value perceptions for more (almonds) vs. less (goldfish crackers) healthy 99‐calorie snacks. In addition, we measured participants' level of dietary restraint. Results suggest that consumers with high vs. low dietary restraint levels do prefer low‐calorie snacks for different reasons. Hedonic value perceptions explain consumers with low dietary restraint preference for the less healthy snack, while utilitarian value perceptions explain consumers with high dietary restraint preference for the healthier snack. We conclude with a discussion on the managerial and policy implications of our findings.     

Examination of the health‐belief model to predict the dietary quality and body mass of adults

We examined the ability of the health‐belief model to predict individuals’ dietary quality and body mass among a nationwide sample of 1319 adults in the United States. Simultaneous estimation of the structural equation model found acceptable goodness‐of‐fit to the data. Explained variance in dietary quality and body mass, however, were moderate to weak. The model included three types of nutrition knowledge: basic facts, diet–health awareness and ability to accurately self‐assess nutrient intake. None of these variables had a strong effect on dietary quality or body mass. We speculate that lifestyle characteristics, cultural habits, community infrastructure, and the politics of food production and retailing – variables found in other studies to affect dietary quality and body mass yet not available in our data – might outweigh the effects of nutrition knowledge and sociodemographic factors on estimating dietary quality and body mass. We suggest that future research and intervention programmes focus more on social, cultural and political context than on nutrition knowledge. Current collaborations among life and social scientists to design foods to improve human nutrition might also prove effective in reducing the prevalence of overweight and obesity.