植物油食用方法对维生素E含量的影响

维生素Ｅ是人体内抗氧化作用、维持生殖功能和神经、免疫、上皮细胞正常反应的重要维生素。据1989年全国65个县调查结果,我国人群体内维生素Ｅ水平还是偏低的,有在食品中强化的必要,国家规定在植物油中强化维生素Ｅ。本实验研究了食用植物油中维生素Ｅ在食物烹调中的保留率,以及不同植物油对不同类型维生素Ｅ保留率的影响,为今后合理摄取维生素Ｅ这一人体必需的营养素提供科学的依据。1　材料和方法11　实验材料　市售的不同品牌花生油,核桃油,小磨香麻油。12　样品处理　每种食用植物油均按家庭常用方法,烹调采用了炒、炸、蒸等方式。本实…     

饮食的迷思

正当今都市流行各种所谓"健康"饮食法:生酮、轻断食、阿特金斯……各种营养成分也都受到过"健康"的追捧或"不健康"的指责:植物油的不饱和脂肪酸健康;植物油伤脑、动物脂肪不易高温变性;动物脂肪增加心血管疾病风险、糖分给大脑快速供能;糖分扰乱分泌,红肉提供丰富的维生素B12;红肉蛋白诱发癌症……关心健康的你,到底何去何从?     

食疗攻略:吸烟的人群多吃什么食物好?

正吸烟者宜经常多吃一些富含这些维生素的食物,如牛奶、胡萝卜、花生、玉米面、豆芽、白菜、植物油等,这样既可补充由于吸烟所引起的维生素缺乏,又可增强人体的自身免疫功能。1、补充维生素烟气中的某些化合物,可以使维生素A、B、C、E等的活性大为降低,并使体内的这些维生素得到大量的消耗。因此,吸烟者宜经常多吃一些富含这些维生素的食物,如牛奶、胡萝卜、花生、玉米面、豆芽、白菜、植物油等,这样既可补充由于吸烟所引起的维生素缺乏,又可增强人体的自身免疫功能。2、茶叶     

正确选择食用油

油是人们饮食中的调味品，也是必需品，因此正确选择食用油很重要。食用油主要包括动物油和植物油，植物油富含人体必需的脂肪酸，且不饱和脂肪酸比例高，不含胆固醇，还富含维生素E；而动物油所含人体必需的脂肪酸很少，富含维生素A、维生素D，胆固醇与饱和脂肪酸含量却比较高。而饱和脂肪酸可促进血脂升高，不饱和脂肪酸有助于降低血清胆固醇。     

合理使用营养素补充剂

正何为营养素补充剂它是指用于弥补膳食中微量营养素(如维生素、矿物质等)不足的营养素制剂。凡是能维持人体健康以及提供生长发育和劳动所需要的各种物质均称营养素,含量较多的称之为宏量营养素,包括碳水化合物、蛋白质和脂肪。这些营养素是提供能量的,摄入过多会导致体重增加;还有一类是微量营养素,主要指矿物质和维生素,摄入过少会营养不良,出现各种症状。     

“维他命”的毒副作用

“维他命”是维生素的早期译名。顾名思义,维生素即维持生命的要素。然而,这类人体必须的且广泛存在于各种食品中的营养素,如使用不当,也能置人于死地。维生素分为两大类,一类是水溶性维生素,如维生素B_2、B_2、B_6、B_12、C等;另一类是脂溶性维生素,如维生素A、D、E等。一般人认为维生素是人体的营养素,多吃有益无害。甚至也有不少医生对病人     

药膳两则

性功能障碍、性功能衰退者的饮食中,首先要补充优质蛋白质,其次应补充各种矿物质及微量元素。另外,注意补充各种维生素,特别是维生素E,它能调节性腺功能并能增加精子的活力。维生素E一般在植物油如玉米油、豆油中含量最多,花生、芝麻、菜油中亦有较多含量。     

腿部健美秘诀

腿是人体的重要组成部分之一,腿的线条直接涉及到人体的美。以下是如何保持腿部健美的九条秘诀。注意饮食人的腿长得是否健美,虽与先天遗传有关,但在很大程度上取决于后天有意识的培育。如果您的双腿太粗,建议应当节制饮食,少吃糖、脂肪和咖啡等带刺激性的食品,多吃新鲜蔬菜和水果。因为蔬菜和水果中富含水分和纤维,能帮助您改善双腿的线条。还应当多吃含有维生素E的食品,能使您的腿部肌肉充满活力而不松弛。植物油、瘦肉类、乳类、蛋类、绿叶菜及各种干果中都含有丰富的维生素E。避免受热热是双腿的大敌。当腿部毛细血管受热扩张时,大腿、…     

食用植物油中Vit.E的正相高效液相色谱快速测定研究

前言植物油中含有丰富的维生素Ｅ，其英文名称为Ｔｏｃｏｐｈｅｒｏｌ，在生物体内主要表现为抗氧化作用，对预防衰老与人体免疫有着密切的关系。维生素Ｅ也称生育酚，因附着于氧杂萘基数和位置的不同分α、β、γ、δ四种。植物油中天然存在的具维生素Ｅ作用的物质有与生...     

光照易导致维生素流失

害怕光照的维生素 维生素K:维生素K,能促进血液正常凝固.人体所需量非常少,一般正常饮食就能提供足够的维生素K,但它却是维护血液正常凝固不可缺少的.天然的维生素K 已经发现有两种:维生素K1和维生素K 2,属于脂溶性维生素.维生素K1又称叶绿醌,见于绿叶蔬菜,如菠菜、甘蓝、甜菜、绿豆、莴笋、花椰菜、芥菜等;其次是肉类和...     

Parenteral Soy Oil and Fish Oil Emulsions

Background: Parenteral nutrition (PN)–associated liver disease (PNALD) remains a significant cause of morbidity and mortality for neonates dependent on PN. Total fat emulsion dose and composition, particularly the large amount of ω‐6 long‐chain polyunsaturated fatty acids in plant oils, have been proposed as risk factors for PNALD. We hypothesized restriction of the dose of emulsion would prevent PNALD, regardless of the composition, but growth could be compromised. Methods: Using a neonatal piglet model, we compared conventional soy oil emulsion (Intralipid), dosed high (SO10, n = 8: 10 g/kg/d) and low (SO5, n = 6: 5 g/kg/d), with fish oil (Omegaven), dosed low (FO5, n = 8: 5 g/kg/d). Piglets were given isonitrogenous PN for 14 days. The normal range for all parameters was determined by measurement in equivalent aged sow‐reared piglets. Results: Bile flow was lower with high‐dose Intralipid, outside the normal range, while higher for the other groups (SO10, 5.4 µg/g; SO5, 8.6 µg/g; FO5, 13.4 µg/g; P = .010; normal range, 6.5–12.2 µg/g). Total body weight was low in all treatment groups (SO10, 4.4 kg; SO5, 4.5 kg; FO5, 5.0 kg; P = .038; normal range, 5.2–7.3 kg). Brain weight was not different between groups (SO10, 40.3 g; SO5, 36.0 g; FO5, 36.6 g; P = .122; normal range, 41.8–51.4 g). Corrected for body weight, brain weight was lowest in the fish oil group (SO10, 9.3 g/kg; SO5, 8.0 g/kg; FO5, 7.3 g/kg; P < .001; normal range, 5.9–9.0 g/kg). Conclusion: Low‐dose fat emulsions reduce the risk of developing PNALD. Further investigation of the risk to brain development in neonates exposed to dose restriction, particularly with fish oil, is required.     

Canola Oil

Canola oil is a low erucic acid rapeseed oil which is now Canada's third most important crop. The low-linolenate variety of Canola is stable to high frying temperatures and has a bland odour. It is also used in salad oils, and blended with other oils, in margarines and shortenings. Possible health benefits could be provided by canola's relatively high content of oleic and linolenic acids and by its favourable linoleate/linolenate ratio.     

地沟油含油量快速测定方法的探讨与研究

采用离心法、加热法与国标法分别进行不同批次测定地沟油含油量的对比,同时对离心法的离心速度、加热法的加热终点进行研究,结果表明：离心速度为6 000 r/min时的检测数据比3 000 r/min的检测数据更接近国标法检测结果;加热法检测数据比离心法检测数据精确度高;同时加热法分析时间较离心法分析时间短.     

排油烟机收集油的致突变性研究

采集太原市居民厨房排油烟机收集盒内的油烟，采用Ａｍｅｓ试验、ＳＯＳ显色试验和小鼠骨髓微核试验，结其进行致突变性研究。结果表明：太原市居民熟调油烟物质具有致突变性，但因烹调油温在２５０℃以下，其致突变化力比国内报导的略弱。     

A Nutritional-Toxicological Assessment of Antarctic Krill Oil versus Fish Oil Dietary Supplements

Fish oil dietary supplements and complementary medicines are pitched to play a role of increasing strategic importance in meeting daily requirements of essential nutrients, such as long-chain (≥C₂₀, LC) omega-3 polyunsaturated fatty acids and vitamin D. Recently a new product category, derived from Antarctic krill, has been launched on the omega-3 nutriceutical market. Antarctic krill oil is marketed as demonstrating a greater ease of absorption due to higher phospholipid content, as being sourced through sustainable fisheries and being free of toxins and pollutants; however, limited data is available on the latter component. Persistent Organic Pollutants (POP) encompass a range of toxic, man-made contaminants that accumulate preferentially in marine ecosystems and in the lipid reserves of organisms. Extraction and concentration of fish oils therefore represents an inherent nutritional-toxicological conflict. This study aimed to provide the first quantitative comparison of the nutritional (EPA and DHA) versus the toxicological profiles of Antarctic krill oil products, relative to various fish oil categories available on the Australian market. Krill oil products were found to adhere closely to EPA and DHA manufacturer specifications and overall were ranked as containing intermediate levels of POP contaminants when compared to the other products analysed. Monitoring of the pollutant content of fish and krill oil products will become increasingly important with expanding regulatory specifications for chemical thresholds.