Delay of natural bone loss by higher intakes of specific minerals and vitamins

For early prevention or inhibition of postmenopausal and age-related bone loss, nutritional interventions might be a first choice. For some vitamins and minerals an important role in bone metabolism is known or suggested. Calcium and vitamin D support bone mineral density and are basic components in most preventive strategies. Magnesium is involved in a number of activities supporting bone strength, preservation, and remodeling. Fluorine and strontium have bone-forming effects. However, high amounts of both elements may reduce bone strength. Boron is especially effective in case of vitamin D, magnesium, and potassium deficiency. Vitamin K is essential for the activation of osteocalcin. Vitamin C is an important stimulus for osteoblast-derived proteins. Increasing the recommended amounts (US RDA 1989), adequate intakes (US DRI 1997), or assumed normal intakes of mentioned food components may lead to a considerable reduction or even prevention of bone loss, especially in late postmenopausal women and the elderly.     

Citrus peel extract – A natural source of antioxidant

Citrus peel extract as a natural source of antioxidant was evaluated during 6 months storage of refined corn oil at 25 and 45 °C. Extracts of citrus peel were prepared by refluxing the dried ground peel with ethanol, methanol, acetone, hexane, diethyl ether and dichloromethane. Maximum amount of citrus peel extract was obtained with methanol. Antioxidant activity of methanolic extract was assessed by measuring free fatty acid (FFA) content peroxide value (POV) and iodine value (IV) during 6 months storage of refined corn oil at 25 and 45 °C. After 6 months of storage at 45 °C, corn oil containing 1600 and 2000 ppm citrus peel extract, showed lower FFA contents (1.5% and 1.0%), and POVs (8.38 and 7.0 meq kg⁻¹) and higher iodine values (81, 89) than the control sample (FFA 17.0% POV 101 meq kg⁻¹ IV 47). Refined corn oil containing 200 ppm of butylated hydroxy anisole (BHA) and butylated hydroxy toluene (BHT) showed FFA contents of 2.0% and 1.8%, POVs 17.0 and 12.7 meq kg⁻¹ and IVs 84 and 87, respectively, after 6 months of storage at 45 °C. These results show that methanolic extract of citrus exhibited very strong antioxidant activity, which was almost equal to synthetic antioxidants (BHA and BHA). Therefore, the use of citrus peel extract is recommended as a natural antioxidant to suppress development of rancidity in oils and fats.     

天然虾青素来源及分离的研究进展

文章概述天然虾青素的来源和存在形式,并探讨碱提法、油溶法、有机溶剂萃取法、超临界CO2萃取、酶解法等常用提取方法,对其效果进行评述。     

动物性天然食品防腐剂的研究进展

随着生活水平的不断提高和对健康的日益关注,人们对食品防腐剂的安全性提出了更高的要求.天然食品防腐剂一般是指从植物、动物、微生物中直接分离提取的,具有防腐作用的一类物质,具有资源丰富、抗菌性强、水溶性好、安全无毒、抑菌谱广等优点,近年来成为食品保鲜防腐领域的研究热点.但是,目前天然食品防腐剂的实际使用并不多,天然食品防腐剂的研究与开发仍存在很多问题.本文主要介绍了5种动物性来源的抑菌物质,阐述了它们作为天然食品防腐剂的理化性质、抑菌机理和应用现状,并针对天然食品防腐剂在研究和应用中所遇到的问题,对天然食品防腐剂的发展方向进行了分析和讨论.     

微生物源天然食品防腐剂的研究进展

天然食品防腐剂按其来源不同可分为植物源天然防腐剂、动物源天然防腐剂和微生物源天然防腐剂。微生物源天然食品防腐剂由于其本身的优越性,越来越受到人们的青睐。本文主要介绍了微生物来源的天然食品防腐剂乳酸链球菌素、ε-聚赖氨酸、曲酸、溶菌酶和甲烷氧化菌素的最新研究进展,阐述了它们的理化性质、抑菌机制和应用现状,同时简单介绍了纳他霉素、抗菌肽、罗伊氏菌素和嗜杀酵母等微生物源天然食品防腐剂的应用现状,旨在为高效、无毒、天然食品防腐剂的研究提供参考。天然食品防腐剂最有发展的可能是将几种来源不同的天然食品防腐剂复配,或者将一种天然防腐剂与其他化学防腐剂复配使用,不仅可以减少防腐剂在食品中的用量,同时还可以使食品的杀菌或抑菌条件更加温和化,对人们的饮食健康非常有利。     

“人”撑起片天

扬州雅伦玩具有限公司堪称是“中国毛绒玩具礼品之都”扬州的玩具行业骨干企业之一。它建厂早，目前已有超过20年的历史；规模大，占地2.8万平方米，佣有3个直属工厂、1个样品开发中心、1个业务中心和1个品控中心，员工逾千人，年生产能力在80万打以上；效益显著，它的产品远销美国、欧盟、中东、日本等国家和地区，公司年纳税额历届扬州市同行前列，固定资产超过900万元。     

蛋黄肽——全新天然蛋白源

<正> 在消费者追求天然食品的今天,韩国Doosan Biotech公司开发出新的食品配料——蛋黄肽。蛋黄肽(DS-YPP)是一种全新天然高科技产品,以蛋黄为原料,经脂提取、酶水解以及纯化过程制成。具体的生产过程见于图一。 功能特性 这种天然蛋黄肽是一种淡黄色接近于白色的粉末,蛋白质含量约80％,易溶于水中,而且可以彻底分解,因此适用于各类食品工业中。一直以来,普遍     

Food supplements as a supplementary source of vitamins in the nourishment of the healthy and ill people

The article considers next items: scientific grounds for preventive and clinical application of vitamins, their recommended dietary intakes, reasons and consequences of their insufficient intake, significance and efficiency of fortificated foods and food supplements for improvement and health.     

Bioavailability of vitamins

In recent years, there has been a reduction in caloric intake in populations with decreased energy demands. This has place a greater emphasis on the bioavailability of nutrients in foods because the total intake of nutrients is generally closely linked with total caloric intake. An assessment of the adequacy of dietary intakes of nutrients requires not only knowledge of the nutrient content of the foods ingested but also the extent to which the nutrient present in the diet is available for absorption and utilization. Nutrients ingested but not released during the digestive process for absorption are of no nutritional value. Bioavailability may be considered the relative absorption of a nutrient from the diet. An index of bioavailability may be extended to include the relative accumulation of a nutrient into various tissues. Various nutrients and dietary components interfere with the bioavailability of vitamins. Hence, requirements for vitamins cannot be considered independently, but must be evaluated in relationship to other nutrients and compounds consumed by an individual. An overview has been presented as to the factors that influence the bioavailability of vitamins in the human food supply.     

比以往更具价值

控制条干均匀度,提升质量和利润自1948年以来,全球共售出了14 000多台乌斯特条干检测仪,比世界上其它任何品牌的条干仪都要多.因此,可以自信地说纺织业每天都能从这款经典的质量控制仪器上受益.     

Comparison of different Brazilian citrus by-products as source of natural antioxidants

Significant amounts of citrus by-products remain after juice processing, which is then used to obtain pectin. The pectin industry then generates a new waste. No study has characterized this residue or suggested applications for it. The main goal of this study was to compare citrus industrial by-products that remain after juice (CJB) and pectin (CPB) extraction, aiming to obtain bioactive compounds. The residues were evaluated for their chemical composition, antioxidant capacity, and polyphenols content. CJB had 2-fold higher total phenols than CPB. Moreover, CJB exhibited higher antioxidant capacity than CPB. Nine polyphenols were detected; hesperidin was the main compound on both residues. CPB had higher content of polyphenols than CJB, which can be attributed to the industry procedure of pectin extraction. Thus, this study provides support for the reuse of CPB to obtain nutraceutical compounds, converting waste into added-value products.     

每个女人都很珍贵 Pia Mariani解读我的铂金“感悟”系列2009春夏新品主打款

4月20日,国际铂金协会在中国发布六款2009年春夏系列新品。在这个名为“感悟”的系列中,意大利设计师Pia Mariani设计了其中的两个主打款——“觅”和“映”。在4月初举行的瑞士巴塞尔钟表珠宝展中,Pia在国际铂金协会展位接受了记者的采访。     

Bergamot: A source of natural antioxidants for functionalized fruit juices

Bergamot is a common Italian citrus fruit, cultivated almost exclusively to produce essential oils; the juice is considered a waste product, which represents a serious environmental and economic problem for the industries. The aim of this study was to re-evaluate bergamot juice through its chemical characterization and its use to enrich and fortify fruit juices. To investigate this, apples and apricots were used for the laboratory-scale production of fruit juice, following both the traditional industrial recipe and those with the addition of bergamot juice at 10% or 20%, together with or in order to replace the synthetic additives normally used in the industrial process (ascorbic acid and citric acid). The ascorbic acid content and the antioxidant activity were measured during the different steps of juice production and after storage at 37 °C for 15 days to evaluate juice shelf-life. Apricot and apple juices fortified with bergamot juice showed a significant increase in their antioxidant properties and a decreased reduction in ascorbic acid content after the typical production steps. All of the results obtained support the hypothesis that the addition of bergamot juice to juices preserves their ascorbic acid content from thermal degradation and contributes to enhance the antioxidant activity, ensuring a product much richer in antioxidants and ascorbic acid. A preliminary consumer test encouraged the production of bergamot fortified fruit juices. Finally, this is the first time that isorhoifolin and rutin have been detected in bergamot juice.     

Bioactive compounds from Cudrania tricuspidata: A natural anticancer source

Abstract

The tumor is becoming a critical threat to our lives in these years. Searching for antitumor substances from natural products is a great interest of scientists. Cudrania tricuspidata (C. tricuspidata) is a regional plant containing 158 flavonoids and 99 xanthones, and others ingredients with favorable bioactivity. This review comprehensively analyzes the antitumor compounds from C. tricuspidata against different tumors, and 78 flavonoids plus xanthones are considered as underlying antineoplastic. Importantly, the structure of preylation groups is the primary source of antitumor activity among 45 flavonoids plus xanthones, which could be a direction of structural modification for a better antitumor ability. Additionally, the fruits are also preferable sources of antitumor compounds compared to the roots and barks due to the abundant isoflavones and sustainability. However, many studies only focused on the cells viability inhibition of the compounds, the underlying molecular mechanisms, and the intracellular targets remain ambiguous. In conclusion, C. tricuspidata has a great potential for anti-tumor prevention or therapy, but more attention should be paid to deeper research in vitro and in vivo models.     

植物源天然食品抗氧化剂及其应用的研究

阐述了植物来源的天然食品抗氧化剂的性质、来源、化学结构、抗氧化活性、抗氧化及协同增效机理等的研究进展,介绍了天然食品抗氧化剂在食品贮存、保鲜、抗衰老、美容等方面的应用,并提出关于天然抗氧化剂研究、开发及应用等方面的建议.     

The antioxidant vitamins

This article is an attempt to study the metabolic functions of vitamin C and E together. Such a study must necessarily be incomplete owing to the extreme richness of the literature. The increasing importance of the work on free radical reactions, their toxicity and carcinogenic action, and also their relation to the metabolism of metals, particularly iron, copper, selenium, and zinc, shows a number of metabolic pathways with which both vitamims interact. It is hoped that this article will indicate future research possibilities.