Antimicrobial activity of coriander oil and its effectiveness as food preservative

Foodborne illness represents a major economic burden worldwide and a serious public health threat, with around 48 million people affected and 3,000 death each year only in the USA. One of the possible strategies to reduce foodborne infections is the development of effective preservation strategies capable of eradicating microbial contamination of foods. Over the last years, new challenges for the food industry have arisen such as the increase of antimicrobial resistance of foodborne pathogens to common preservatives and consumers demand for naturally based products. In order to overcome this, new approaches using natural or bio-based products as food preservatives need to be investigated. Coriander (Coriandrum sativum L.) is a well-known herb widely used as spice, or in folk medicine, and in the pharmacy and food industries. Coriander seed oil is the world's second most relevant essential oil, exhibiting antimicrobial activity against Gram-positive and Gram-negative bacteria, some yeasts, dermatophytes and filamentous fungi. This review highlights coriander oil antimicrobial activity and possible mechanisms of action in microbial cells and discusses the ability of coriander oil usage as a food preservative, pointing out possible paths for the successful evolution for these strategies towards a successful development of a food preservation strategy using coriander oil.     

我国天然维生素E产业化前景初探

为了探讨我国天然维生素E产业化的前景，基于国内外天然维生素E生产现状与市场前景，提出我国天然维生素E产业化发展建议，不断完善和提高工艺技术、提高多品种开发能力，对发展我国天然维生素E产业具有重要的促进作用。     

天然矿泉水及其卫生监控

天然矿泉水的卫生问题是目前矿泉水产品质量中最突出的问题。天然矿泉水生产中容易出现的沉淀、杂质(异物)和微生物危害,不但严重影响产品的声誉,而且给厂家造成巨大的经济损失。文章从天然矿泉水的风险评估、微生物学问题、瓶装水的技术问题、国内外天然矿泉水的卫生检验标准以及卫生监控方法等方面得到关键控制点——微生物危害,同时,通过国内外检验方法的对比,找出天然矿泉水的合理检验方法及卫生监控措施。     

茶多酚对香肠抗氧化作用的研究

采用不同浓度茶多酚对香肠进行处理实验,筛选出能明显抑制香肠哈败、显示较强抗氧化效能的茶多酚添加量为0.05%。     

Apple Polyphenol Oxidase Inhibitor(s) from Common Housefly (Musca Domestica L.)

ABSTRACT: A new natural apple polyphenol oxidase (PPO) inhibitor(s) from housefly ( Musca domestica L.) was discovered. Crude inhibitor (s) isolated by buffer extraction, heat treatment, and dialysis from housefly pupae inhibited the activity of apple PPO up to 90% at pH values above 5.0. Inhibition was strictly pH-dependent. The inhibitor(s) was further characterized by employing heat, freezing and thawing, irradiation, pH adjustment, and ultrafiltration studies. The potential PPO inhibitor(s) was stable to heating at 100 °C for 1 h, repeated freezing and thawing, and irradiation. The inhibitor(s) was most stable at pH around 5.0 and least stable at alkaline pH. The PPO inhibition profile of housefly during metamorphosis also was evaluated.     

天然金刚石资源与市场分析

天然金刚石除用作宝石之外，广泛应用于工业，随着工业的发展，其产量逐年增加。全球天然金刚石的产量主要集中在澳大利亚等五个国家。但国际天然金刚石市场基本上受De Beers集团公司控制。从世界天然金刚石资源来看，天然金刚石在工业上的应用将不再占有优势。     

柚果皮中生理活性成分研究进展

对柚果皮中黄酮类化合物、类柠檬苦素、天然色素及香精油的化学组成、分布、药理作用及应用等进行综述     

天然染料染色羊毛的色域拓展及颜色预测模型

天然染料色谱不全的缺陷限制了其在羊毛上的应用。为丰富天然染料染色羊毛纤维的颜色色谱,选用天然红、黄、蓝三原色染料染色羊毛织物与纤维,然后对羊毛织物的一浴法拼混染色和有色纤维的拼色进行研究,并基于Kubelka-Munk单常数理论和Stearns-Noechel模型分别对一浴法拼混染色织物和拼混有色纤维进行颜色预测。结果表明：使用一浴法拼混染色,染色后的羊毛织物在CIELAB色域空间中分布不均匀,倾向于红(+a^*),色相角(h)分布范围主要集中在0°～24°、324°～360°之间;经有色纤维拼混获得的颜色空间分布更加均匀,更倾向于黄(+b^*),色相角(h)分布范围集中在0°～50°、316°～360°区域;Kubelka-Munk模型和Stearns-Noechel模型可分别用于天然染料一浴法染色羊毛织物和羊毛有色纤维拼色的颜色预测,为进一步提高生产效率、降低配色成本提出新思路。     

不饱和脂肪酸的氧化机理研究

本文主要研究了天然油脂衍生物脂肪酸-油酸，十八碳混合烯酸，芥酸，花烯酸的氧化及其机理，着重考查了这几种脂肪权在深度氧化条件下，其脂肪链结构对PV变化的影响；实验证明：脂肪酸可以深度氧化，天然油脂中的游离脂肪酸对氧化不存在明显的影响。有利于油脂的技术开发。