脱臭蒜素胶囊的研制

介绍了大蒜的主要化学成分及食疗价值,探讨了大蒜的脱臭机理,阐述了脱臭蒜素胶囊的制造技术.     

脱臭蒜素提取机理及脱臭蒜素原汁酒的研制

大蒜中的有效成份是大蒜素 ,它具有强烈的刺激性臭味。但鲜蒜中大蒜素是以稳定无臭的大蒜氨酸的形式存在。当大蒜受到冲击 (切片或捣碎 ) ,大蒜酶接触到空气后活化 ,大蒜氨酸转化大蒜素。根据大蒜素的理化性质 ,采用不同的反应条件进行脱臭实验。开发研制出脱臭蒜素原液、脱臭蒜素保健饮料、脱臭蒜素原汁酒等系列产品     

蒜素酱油生产技术

开发意义大蒜含有蒜素(Amdn，Garlich)，主要成分为大蒜辣素(CH2：CH-CH2-S-S-S-CH2-CH=CH2)、烯丙基硫醚等，具有强力杀菌作用，对大肠杆菌、痢疾杆菌、金黄色葡萄球菌等都有杀灭作用。有防治肠胃炎、肺炎等病菌感染引起的疾病的特点。功效人们已熟知。大蒜有降低血脂、胆固醇、     

影响蒜素后续降解反应的因素

为了在提取和保存过程中提高大蒜制品中蒜素的含量,进行了蒜素后续反应的稳定性和蒜氨酸酶对蒜素后续反应影响的研究.以蒜素为检测指标,乙醇提取新鲜去皮大蒜中的蒜素,分光光度法测量蒜素含量.研究了不同温度、真空度和光照等因素下对蒜素后续降解反应的影响,提取蒜氨酸酶,研究了蒜氨酸酶对蒜素后续降解反应的影响.研究表明:低温、真空及遮光条件下进行蒜素的提取或保存,蒜素比较稳定,降解缓慢;蒜氨酸酶会催化蒜素的降解反应,随着加酶量的增加,降解反应速度增加.     

无臭蒜素与玉米胚芽油的制取及其在化妆品中的应用

论述了无臭蒜素与玉米胚芽油的制取,探讨了无臭蒜素与玉米胚芽油的保健功效及其在化妆品中的应用。     

蒜素对黄瓜种子发芽及胚根生长的作用效应

从植物间的相生相克作用入手，重点研究蒜素对黄瓜种子发芽、胚根生长的影响及生理作用，结果表明：４％以上蒜素浓度显著抑制黄瓜的前期发芽，其它各处理水平对后期无显著影响；２％浓度水平有极显著促进胚根伸长的作用，胚根长高于对照和其它处理２３．７％～４３．１％。８％、６％浓度水平显著抑制胚根伸长和测报发生，比对照降低１４．７％和２１．０％～３９．２％。造成这种相生相克的主要原因是丙氨酸、甘氨酸酶、蛋氨酸等氨基酸，在胚根中含量的减少和升高有关，减少则促进胚根伸长，升高Ｒ４抑制胚根伸长，与天冬氨酸等１０种氨基政的变化关系不大。     

多菌灵+福美双、三唑酮+乙蒜素对植物插穗成活率的影响

用多菌灵50% 福美双50%和三唑酮6.25% 乙蒜素93.75%,各配制成10种不同浓度的溶液,分别对九重葛、鹅掌柴和变叶木3种植物的插穗浸泡处理3 h后扦插.结果表明:九重葛插穗用多菌灵50% 福美双50%浸泡,插穗成活率可达到100%,比对照提高40%,最佳处理溶液浓度为541.5 mg/L;而鹅掌柴和变叶木插穗用三唑酮6.25% 乙蒜素93.75%浸泡,插穗成活率可分别达到100%和80%,比对照分别提高46.67%和60%,最佳处理溶液浓度分别为267.41 mg/L和293 mg/L.     

乙醇萃取分离大蒜素的工艺研究

蒜素及其降解产物是大蒜中的主要活性物质,具有多种重要生理功能。文章研究了以乙醇为浸提剂分离提取蒜素的工艺条件,将大蒜破碎后,加入浓度为6mmol/L的Fe2+离子,调节pH值至6.4,在30℃下放置40min,并尽量避免接触Cu2+。结果证明,在此条件下,以体积分数为95%的乙醇,在30℃下浸提40min,蒜素提取率可以达到0.1%以上。     

大蒜的食疗价值及其深加工制品的研制

分析了大蒜的营养成分及食用药用价值,阐述了大蒜臭味产生的分子机理及脱臭方法,介绍了脱臭蒜素复合饮料等系列产品的加工技术。     

大蒜脱臭方法及其系列保健产品开发和利用的初步研究

本文对大蒜(Allium Sativum L.)采用加热、添加剂处理及加入矮味剂等方法进行了脱臭实验,利用定硫法测定了大蒜脱臭前后的蒜素含量,比较了不同脱臭方法的效果,并对大蒜脱臭系列保健产品的开发应用进行了初步研究.     

大蒜的食疗价值及其深加工制品的研究

分析了大蒜的营养成分及食用药用价值,阐述了大蒜臭味产生的分子机理及脱臭方法,介绍了脱臭蒜素复合饮料等系列产品的加工技术.     

澳研究显示大蒜有助降血压

澳大利亚阿德莱德大学的研究人员最新研究发现,食用大蒜对人们降低血压有帮助,而且其效果不亚于一些降压药物。据澳大利亚媒体报道,在试验中,研究人员要求受试者在3至6个月中每天服用600至900毫克含有"蒜素"的营养补充剂,而对照组人员则服用安慰剂。     

具有良好可再生性的新型二氧化硅磁性氧化石墨烯纳米复合材料

Graphene oxide (GO) wrapped Fe₃O₄ nanoparticles (NPs) were prepared by coating the Fe₃O₄ NPs with a SiO₂ layer, and then modifying by amino groups, which interact with the GO nanosheets to form covalent bonding. The SiO₂ coating layer plays a key role in integrating the magnetic nanoparticles with the GO nanosheets. The effect of the amount of SiO₂ on the morphology, structure, adsorption, and regenerability of the composites was studied in detail. An appropriate SiO₂ layer can effectively induce the GO nanosheets to completely wrap the Fe₃O₄ NPs, forming a core-shell Fe₃O₄@SiO₂@GO composite where Fe₃O₄@SiO₂ NPs are firmly encapsulated by GO nanosheets. The optimized Fe₃O₄@SiO₂@GO sample exhibits a high saturated adsorption capacity of 253 mg·g?1 Pb(II) cations from wastewater, and the adsorption process is well fitted by Langmuir adsorption model. Notably, the composite displays excellent regeneration, maintaining a ~90% adsorption capacity for five cycles, while other samples decrease their adsorption capacity rapidly. This work provides a theoretical guidance to improve the regeneration of the GO-based adsorbents.     

微波预处理对复杂铜矿磨矿及浮选动力学的影响

The effect of CaCO₃, Na₂CO₃, and CaF₂ on the reduction roasting and magnetic separation of high-phosphorus iron ore containing phosphorus in the form of Fe₃PO₇ and apatite was investigated. The results revealed that Na₂CO₃ had the most significant effect on iron recovery and dephosphorization, followed by CaCO₃, the effect of CaF₂ was negligible. The mechanisms of CaCO₃, Na₂CO₃, and CaF₂ were investigated using X-ray diffraction (XRD), scanning electron microscopy and energy dispersive spectrometry (SEM–EDS). Without additives, Fe₃PO₇ was reduced to elemental phosphorus and formed an iron–phosphorus alloy with metallic iron. The addition of CaCO₃ reacted with Fe₃PO₇ to generate an enormous amount of Ca₃(PO₄)₂ and promoted the reduction of iron oxides. However, the growth of iron particles was inhibited. With the addition of Na₂CO₃, the phosphorus in Fe₃PO₇ migrated to nepheline and Na₂CO₃ improved the reduction of iron oxides and growth of iron particles. Therefore, the recovery of iron and the separation of iron and phosphorus were the best. In contrast, CaF₂ reacted with Fe₃PO₇ to form fine Ca₃(PO₄)₂ particles scattered around the iron particles, making the separation of iron and phosphorus difficult.     

不同硅饱和系数水榴石的碳酸化分解动力学

Carbonated decomposition of hydrogarnet is one of the vital reactions of the calcification–carbonation method, which is designed to dispose of low-grade bauxite and Bayer red mud and is a novel eco-friendly method. In this study, the effect of the silica saturation coefficient (x) on the carbonation of hydrogarnet was investigated from the kinetic perspective. The results indicated that the carbonation of hydrogarnets with different x values (x = 0.27, 0.36, 0.70, and 0.73) underwent two stages with significantly different rates, and the kinetic mechanisms of the two stages can be described by the kinetic functions R3 and D3. The apparent activation energies at Stages 1 and 2 were 41.96–81.64 and 14.80–34.84 kJ/mol, respectively. Moreover, the corresponding limiting steps of the two stages were interfacial chemical reaction and diffusion.     

一种超重力燃烧合成制备高性能高熵合金的新方法

A new method of high-gravity combustion synthesis (HGCS) followed by post-treatment (PT) is reported for preparing high-performance high-entropy alloys (HEAs), Cr_0.9FeNi_2.5V_0.2Al_0.5 alloy, whereby cheap thermite powder is used as the raw material. In this process, the HEA melt and the ceramic melt are rapidly formed by a strong exothermic combustion synthesis reaction and completely separated under a high-gravity field. Then, the master alloy is obtained after cooling. Subsequently, the master alloy is sequentially subjected to conventional vacuum arc melting (VAM), homogenization treatment, cold rolling, and annealing treatment to realize a tensile strength, yield strength, and elongation of 1250 MPa, 1075 MPa, and 2.9%, respectively. The present method is increasingly attractive due to its low cost of raw materials and the intermediate product obtained without high-temperature heating. Based on the calculation of phase separation kinetics in the high-temperature melt, it is expected that the final alloys with high performance can be prepared directly across master alloys with higher high-gravity coefficients.     

窄板坯结晶器内连铸工艺参数对钢液流场的影响

Computational simulations and high-temperature measurements of velocities near the surface of a mold were carried out by using the rod deflection method to study the effects of various operating parameters on the flow field in slab continuous casting (CC) molds with narrow widths for the production of automobile exposed panels. Reasonable agreement between the calculated results and measured subsurface velocities of liquid steel was obtained under different operating parameters of the CC process. The simulation results reveal that the flow field in the horizontal plane located 50 mm from the meniscus can be used as the characteristic flow field to optimize the flow field of molten steel in the mold. Increases in casting speed can increase the subsurface velocity of molten steel and shift the position of the vortex core downward in the downward circulation zone. The flow field of liquid steel in a 1040 mm-wide slab CC mold can be improved by an Ar gas flow rate of 7 L·min?1 and casting speed of 1.7 m·min?1. Under the present experimental conditions, the double-roll flow pattern is generally stable at a submerged entry nozzle immersion depth of 170 mm.     

电渣重熔脱硫技术研究进展

Electroslag remelting (ESR) gives a combination of liquid metal refining and solidification structure control. One of the typical aspects of liquid metal refining during ESR for the advanced steel and alloy production is desulfurization. It involves two patterns, i.e., slag–metal reaction and gas–slag reaction (gasifying desulfurization). In this paper, the advances in desulfurization practices of ESR are reviewed. The effects of processing parameters, including the initial sulfur level of consumable electrode, remelting atmosphere, deoxidation schemes of ESR, slag composition, melting rate, and electrical parameters on the desulfurization in ESR are assessed. The interrelation between desulfurization and sulfide inclusion evolution during ESR is discussed, and advancements in the production of sulfur-bearing steel at a high-sulfur level during ESR are described. The remaining challenges for future work are also proposed.