人体钙及维生素摄取与骨质疏松的防治

论述了人体钙，维生素摄取与骨质疏松的关系，人体钙需要量及对钙的吸收，科学摄取钙及维生素得于防治骨质疏松，概述了我国目前补钙食品及钙制剂的现状并提出建议，介绍了引进骨质疏松的新观点。     

梨的食疗作用

梨的营养价值很高,每100克鲜梨中含糖8-10克,蛋白质0.1克,脂肪0.1克,碳水化合物12克,钙5毫点,磷6毫克,铁0 .2毫克,以胡萝卜素,维生素B1,维生素B2维生素PP、     

降胆固醇食物新发现——鸡蛋

鸡蛋是日常生活中营养丰富的食物，它含有蛋白质、脂肪、卵黄素、卵磷脂和铁、钙、钾等人体所需的矿物质，同时，又是人体所需要的维生素A、维生素D、维生素E、维生素K、维生素B1、维生素B2的良好来源。所以鸡蛋对于人们来说实在是价廉物美的营养佳品。     

三月三，荠菜当灵丹

荠菜为十字花科植物，又名地菜，是人们喜爱的一种野菜，每年4月开花，含丰富的维生素C，胡萝卜素和维生素A，无机物主要以钙和铁两种成分为最多，呈碱性，是可食用的含蛋白质最高的野菜之一。[编者按]     

透视月子餐

分娩就像是一场重体力劳动。消耗妈妈们的体力．产后照顾新生儿又颇费精力。同时，新妈咪需要通过合理的饮食来调补身体，以产生足够的高质最乳汁喂养宝宝，这就需要提高维生素的摄取量，包括适当提高维生素B1．维生素B2。烟硷酸、维生素A、维生素C的摄入，还需要保持一定量的钙。磷，铁摄入量。药补不如食补．但并不代表着坐月子时就一定要整锅整锅地喝汤，或者每天一只老母鸡或猪蹄膀往肚子里塞。     

高钙牛乳的研制

高钙牛乳是在牛乳中添加乳钙,剂和维生素Ｄ等添加剂而制成的钙强化类乳制品,乳钙可以增加产品钙含量,稳定剂提高乳钙的稳定性,维生素Ｄ用以促进产品的钙吸收率。针对乳钙、等配料的特点,确定了合理,可行的生产工艺。产品具有钙含量高、稳定性好,口感性,吸收率较高等特点。     

维生素AD结合钙处理对番茄贮藏期硬度的影响

以辽园多丽号番茄为试材,不同浓度维生素AD结合腐植酸钙处理对番茄贮藏期硬度的影响。各处理番茄果实硬度贮藏期间总体均呈下降趋势,1%维生素AD与0.5%腐植酸钙结合处理的果实硬度为4.649kg/cm2,比单喷施腐植酸钙处理高出26%,比对照高64.76%,原果胶含量逐渐下降,可溶性果胶总体上呈上升趋势。果胶酶,纤维素酶活性总体呈逐渐上升趋势,1%维生素AD与0.5%腐植酸钙结合处理果胶酶含量最低为2.13μg/g·h,比0.5%腐植酸钙处理低8.5%,比对照低43.1%。贮藏结束时,纤维素酶活性为1.963μg/g·h。总体上1%维生素AD与0.5%腐植酸钙结合处理的效果最好,提高了果实的硬度,从而提高了番茄的耐贮性。     

科学分析食品检验结论 准确判定食品案件的违法性质

本文以一起保健食品中维生素指标不合格案件为例,探讨如何对食品检验结论中的不合格项目进行分析,从而准确判定食品案件的违法性质。案件概述2018年,CZ市监管部门对市场流通的XBT保健食品有限公司(以下简称XBT公司)生产的"钙铁锌硒维生素片(成人型)"进行监督抽检(规格型号:1.2g×60片、批号:20171205、类别:保健食品),结果发现维生素A、维生素B 1、维生素D三项指标不合格(功效性成分含量不足)。     

籽瓜中微量元素与维生素含量的分析

采用火焰原子吸收法、高效液相色谱法和紫外可见吸收光谱法对籽瓜的瓜皮、瓜瓤和瓜籽分别进行了微量元素与维生素含量的测定分析。结果表明,籽瓜的瓜籽部分富含钾、钙、镁、铁、锌、硒等微量元素,籽瓜皮和籽瓜瓤也含有较多的钾、钙、镁等微量元素;瓜籽中维生素D和维生素B6、维生素E、维生素B2含量相对较高,而瓜皮和瓜瓤中维生素C含量相对较高。     

经典鹅肠菜式技法十九款

鹅肠,属于禽类产品鹅的肠子,是中餐、火锅的优质食材,富含蛋白质、B族维生素、维生素C、维生素A和钙、铁等微量元素。对人体新陈代谢,神经、心脏、消化和视觉的维护都有良好的作用。     

不同加热处理对花生维生素含量的影响研究

以花生为原料,研究加热处理(水煮、蒸煮、油炸)对花生中维生素的影响.结果 表明:以湿基计,油炸处理后维生素E含量未发生显著变化,其他处理均使维生素E含量下降,花生中的烟酸在水煮处理之后保留率最低;以干基计,加热处理前后维生素E含量无显著变化,花生中的维生素B1在油炸处理之后保留率最低.不同加热处理后花生中烟酸、维生素B...     

维生素D缺乏对新生儿健康影响的研究进展

维生素D是一种脂溶性维生素,不仅具有抗菌抗炎、免疫调节的作用,还参与了人体多种细胞的增殖、分化、凋亡。维生素D缺乏已成为全球性的公共卫生问题,孕妇维生素D缺乏对母婴二人均有直接影响,是新生儿健康的危险因素之一。本文主要综述了维生素D的代谢及生理功能、影响新生儿维生素D水平的因素、维生素D缺乏与新生儿疾病的关系、维生素D水平评价标准、维生素Ｄ的推荐剂量及膳食补充。以期达到提高孕妇补充维生素D的意识的目的,为提高我国新生儿生存质量提供保障,同时为新生儿相关疾病的预防和治疗提供新思路。     

Vitamin Fortification of Fluid Milk

Vitamin concentrates with vitamins A and D are used for fortification of fluid milk. Although many of the degradation components of vitamins A and D have an important role in flavor/fragrance applications, they may also be source(s) of off‐flavor(s) in vitamin fortified milk due to their heat, oxygen, and the light sensitivity. It is very important for the dairy industry to understand how vitamin concentrates can impact flavor and flavor stability of fluid milk. Currently, little research on vitamin degradation products can be found with respect to flavor contributions. In this review, the history, regulations, processing, and storage stability of vitamins in fluid milk are addressed along with some hypotheses for the role of vitamin A and D fortification on flavor and stability of fluid milk.     

维生素B1、B2含量测定方法比较

目的:比较维生素B1、B2含量测定方法。方法:采用紫外分光光度法中三种不同方法测定维生素B1、B2含量。结果:1、按E值测标示量维生素B1:98.3±2.51,维生素B2:94.8±0.308,复合维生素B片中维生素B1:102.1±1.70,维生素B1平均回收率为100.4%,RSD为2.13%(n=6),维生素B2平均回收率为94.9%,RSD为6.5%(n=6)。2、标准曲线法维生素B1、B2浓度分别在3～18、1～8μg/ml范围内,均呈良好线性关系,标示量分别为:102.9±0.661,98.4±0.152。3、双波长法测维生素B1标示量:94.2±1.97。结论:三种方法用于维生素B1、B2含量测定,操作简便、快速、准确,精密度好。     

How Safe is Vitamin E Supplementation?

The safety of large doses of vitamin E went virtually unquestioned until the early 2000s, when several studies were published showing that consumption of vitamin E from dietary supplements increased mortality, as well as the risk of gastrointestinal cancer and heart failure. These studies prompted numerous letters to the editors of medical journals and widespread coverage in the media. Both the medical community and the general public became confused and concerned about the use of vitamin E supplements. The purpose of this article is to review the medical literature and to explain these unusual findings. First we provide an overview of the earlier literature on vitamin E. Second, we provide a critical assessment of three meta-analyses that were neutral or negative toward vitamin E supplementation. Third, we review the limitations of meta-analyses in general. Fourth, we assess the individual studies that comprised one of the three meta-analyses. Since all three meta-analyses used many of the same studies, the individual critique should further the understanding of the limitations of these meta-analyses, and the meta-analysis approach in general. Lastly, we offer some guidance for healthcare professionals to give to the general, healthy public and those with chronic conditions who are no doubt left puzzled as to what to do regarding vitamin E supplementation.     

乳粉中主要B族维生素检测的GB和AOAC方法比较分析

为探究维生素B1、B2、B3（烟酸）、B6的国家标准方法和AOAC官方方法检测结果的可比性和误差来源,该研究通过对测试结果的F检验、显著性差异检验对维生素B1、B2、B3、B6的国家标准方法和AOAC官方方法进行了等效分析、并通过双向单侧t检验（TOST）对维生素B2进行了详尽的比较分析。分析结果表明,维生素B1、维生素B3和维生素B6国家标准方法和AOAC官方方法之间无显著性差异,而维生素B2国家标准方法和AOAC方法之间机理存在差异,通过等效性分析后数据结果表明两种方法等效不好;实验中发现在乳粉基质中添加酸性磷酸酶能够获得更接近可比性数据结果。     

Short communication: effect of vitamins E and C on cortisol production by bovine adrenocortical cells in vitro

The aim was to determine if vitamins E and C inhibit the release of cortisol from bovine adrenocortical cells when stimulated with ACTH in vitro. A factorial arrangement of treatments was used to culture bovine adrenocortical cells with different concentrations of vitamins E and C [(+)-α-tocopherol at 0, 2.3, and 16 μM and l-ascorbic acid at 0, 15, and 50 μM]. After 3 and 7 d of vitamin treatments, cell cultures were stimulated with ACTH (1 nM) for 24 h and the culture medium extracted to measure cortisol released by the cells using HPLC with UV detection. Vitamin E, vitamin C, or their combination did not affect the amount of cortisol released by the adrenal cultures to the media. Cortisol released by the adrenal cultures ranged from 33.6 ± 6.85 to 49.7 ± 8.01 nmol per 10⁷ cells. The modulation effect of vitamins E and C on the stress response does not take place at the cortex of the adrenal gland.     

Selected Vitamin Contents and Retentions in Bison Patties as Related to Cooking Method

Contents and retentions of selected vitamins in broiled and grilled bison patties from four producers were determined. Mean vitamin contents of uncooked bison patties were (per 100 g wet weight): 0.038 mg thiamin, 0.220 mg vitamin B-6, 1.457μg vitamin B-12, and 0.286 mg vitamin E; no differences were observed among producers. Differences were found (P<0.05) among producers for vitamins B-6, B-12, and E (broiled only), but not for thiamin contents of cooked bison patties. The mean retention values in cooked patties were: 68.9% thiamin; 67.5% vitamin B-6; 67.0% vitamin B-12; and 76.1% vitamin E. Bison patties are rich sources of vitamin B-12 and good sources of vitamin B-6.     

Dietary Intake of Natural Antioxidants: Vitamins and Polyphenols

Oxidative stress is a condition in which oxidant metabolites exert their toxic effect because of an increased production or an altered cellular mechanism of protection; oxidative stress is rapidly gaining recognition as a key phenomenon in chronic diseases. Antioxidants terminate these chain reactions by removing free radical intermediates, and inhibit other oxidation reactions by being oxidized themselves. Endogenous defence mechanisms are inadequate for the complete prevention of oxidative damage, and different sources of dietary antioxidants may be especially important. This article calls attention to the dietary antioxidants, such as vitamins A, C, and E and polyphenols. Compelling evidence has led to the conclusion that diet is a key environmental factor and a potential tool for the control of chronic diseases. More specifically, fruits and vegetables have been shown to exert a protective effect. The high content of minerals and natural antioxidant as vitamins A, C, and E and polyphenols in fruits and vegetables may be a main factor responsible for these effects.     

柱切换法液相色谱测定保健食品中的VA、VD、VE

建立柱切换法液相色谱测定保健食品中VA、VD、VE含量的方法.参照GB 5009.82-2016《食品中维生素A、D、E的测定》样品前处理方法,以Agilent Poroshell 120 PFP(4.6 mm×100 mm,2.7 μm)为一维色谱柱,甲醇、水为流动相梯度洗脱,分离VA和VE的4种异构体,以Agile...