禽蛋质优价廉,营养丰富,是菜篮子工程的重要组成部分,可作为孕妇、婴儿、老人等特殊群体的首选健康食品,对于维护人民健康和推进"健康中国"建设意义重大,民生效应极其显著[1].

This study was designed to co-load sialic acid (SA) and chitosan in a water-in-oil (W/O) emulsion and investigated its characterization and stability. Emulsions were prepared using two different oils (olive oil and maize oil) and polyglycerol polyricinoleate (PGPR) alone or in combination with lecithin (LE) as emulsifiers. The results revealed that the aqueous phase of 5% (w/v) SA and 2% (w/v) chitosan could form a stable complex and make the aqueous phase into a transparent colloidal state. Increasing the concentration of PGPR and LE presented different effects on emulsion formation between olive oil-base and maize oil-base. Two stable W/O emulsions that were olive oil-based with 1.5% (w/v) PGPR+ 0.5% (w/v) LE and maize oil-based with 2% (w/v) PGPR+ 0% (w/v) LE were obtained. Initial droplet size distribution curves of the two stable emulsions displayed unimodal distribution, and the rheological curves displayed the characteristics of shear thinning and low static shear viscosity. Moreover, the storage stability showed that there was no significant change in droplet size distribution and Sauter mean diameter of the emulsions at room temperature (25 °C) for 30 days. These results indicated that the W/O emulsions could effectively co-load and protect sialic acid and chitosan and thus could be a novel method for increasing the stability of these water-soluble bioactive compounds.

The production of organogels from vegetable oils requires low-molecular-weight gelators. Herein, a novel small-molecule sugar ester gelator is synthesized from erythritol and octanoic acid. The purified reaction product is identified as erythritol 1,6-dioctanoate by high performance liquid chromatography (HPLC) with evaporative light-scattering detection and nuclear magnetic resonance (NMR). This low-molecular-weight erythritol ester exhibits self-assembly behavior in vegetable oils with a minimum gelation concentration of 4 wt%. Microscopy reveals needle-like crystals that became slender as the gelator concentration increases. X-Ray Diffraction (XRD) analyses indicate that the organogels are semicrystalline with both crystalline and amorphous domains. Fourier Transform Infrared (FTIR) spectroscopy reveals that the gel structure is maintained by non-hydrogen-bonding interactions. Furthermore, rheological tests show that the mechanical strength of the gel is poor, but as the gelator concentration is increased, the mechanical strength and hardness of the gel also increases. Thus, this erythritol ester effectively promotes the gelation of edible vegetable oils and increases the variety of available organogelators. Practical Applications: The synthesized erythritol ester is successfully applied as a gelator to produce organogels from a variety of vegetable oils, and are expected to advance the development of effective organogelators for edible oils.

A rapid and efficient method for the simultaneous detection of lignans (sesamol, sesamin, sesamolin) and tocopherols (αtocopherol, γ-tocopherol, δ-tocopherol) in sesame oil by reversed-phase high-performance liquid chromatography (RP-HPLC) has been established.The samples were ultrasonically extracted in methanol and eluted via a methanol-water gradient on a reversed-phase C18 column with UV/Vis detection.The recoveries of the six analytes ranged from 88.22% to 100.13%, and the relative standard deviations (RSD, n = 6) ranged from 1.90% to 4.57%.This method allowed for measurement of the concentrations of lignans and tocopherols in six commercial sesame oils.This technique is simple, accurate, and highly sensitive and can therefore be used for the routine analysis of real samples.

以牛油、茶籽油和棕榈硬脂为基本原料,通过特异性固定化脂肪酶Lipozyme RM IM催化制备零反式脂肪酸食品专用油脂基料油.在单因素试验基础上进行Box-Behnken响应面试验设计,考查了底物比、酶添加量、反应时间和反应温度对产物滑动熔点的影响,建立了响应面回归模型,确定了酶催化酯交换反应的最优条件为底物比7.55∶2.45∶4.00(牛油∶茶籽油∶棕榈硬脂),酶添加量3.65％,反应时间3.85 h,反应温度72.6℃,所得产物滑动熔点为36.8℃,与理论值37℃接近,误差＜1％,与酯交换反应前相比,经酯交换反应后产物油脂的固体脂肪指数降低,可作为良好的替代氢化油的人造奶油基料油.