气流烘丝参数对卷烟主流烟气7种有害成分释放量的影响

研究了气流烘丝参数(不同物料入口含水率和蒸汽施加量)对卷烟主流烟气7种有害成分(巴豆醛、苯酚、氢氰酸、苯并[a]芘、CO、氨和NNK)释放量的影响,利用DPS和MATLAB软件计算7种有害成分最低释放量和最低烟气危害性指数值(H值)的烘丝工艺参数,并进行了工厂验证试验。结果表明:按照苯并芘释放量优化的参数(物料入口含水率22%,蒸汽施加量325 kg/h)和H值优化参数(物料入口含水率22%,蒸汽施加量186 kg/h)进行烘丝,烘丝后样品卷烟主流烟气中的氢氰酸、CO、氨和NNK释放量以及H值的降幅均超过10%。     

Preparation of iron-loaded alginate gel beads and their release characteristics under simulated gastrointestinal conditions

The formulation and processing variables affecting the preparation of iron-loaded alginate beads for potential use as controlled release carriers were studied. The effect of alginates with different mannuronic/guluronic acid ratios, calcium concentration, loading of iron (II) and iron (III) compounds, variable iron loading times and incorporation of iron at different stages in the preparation were considered. Two successful strategies for the incorporation of iron into alginate beads involved using a mixed iron/calcium cross-linking bath or taking preformed calcium cross-linked beads and subsequently loading them with iron. Beads with 50–80 mg iron/g dried bead could be made with ferrous gluconate, high guluronic acid alginate and the mixed cross-linking bath method. Beads with higher loading, up to 180 mg iron/g dried bead, could be made by loading ammonium ferric citrate. Under simulated gastrointestinal conditions the beads progressively released iron in nutritionally relevant amounts.     

Nanoemulsion- and emulsion-based delivery systems for curcumin: Encapsulation and release properties

Curcumin has been reported to have many biological activities, but its application as a functional ingredient is currently limited because of its poor water-solubility and bioaccessibility. This study investigated the impact of different lipid-based formulations on curcumin encapsulation and bioaccessibility. Oil-in-water nanoemulsions (r < 100 nm), or conventional emulsions (r > 100 nm), were prepared with different lipids: long, medium, and short chain triacylglycerols (LCT, MCT and SCT, respectively). An in vitro model simulating small intestine digestion conditions characterised rate and extent of lipid phase digestion. A centrifugation method determined fraction of curcumin released into mixed micelles after digestion (bioaccessibility). Initial digestion rate decreased in the order SCT > MCT > LCT, while final digestion extent decreased in the order MCT > SCT > LCT. The bioaccessibility of curcumin decreased in the order MCT > LCT ? SCT and appeared to be slightly higher in conventional emulsions than in nanoemulsions.     

CJ40型棉精梳机的性能及应用

为了解CJ40型棉精梳机的性能特点,分析了CJ40型棉精梳机的主要技术特征并进行了纺纱实践.经检验,所纺精梳条质量达到Uster公报25%水平,CJ40型棉精梳机有效输出长度缩短、分离罗拉输出棉网接合长度增加,有效地提高了精梳条质量.     

提高精梳机梳理度的探讨

根据定时潜力可适当放大三类精梳机锡林齿面角.顶梳插入深度受制于落棉隔距的放大.后退给棉比前进给棉对棉须丛多一次梳理循环.落棉率的大小不足以衡量精梳机梳理度的依据,重在精梳条含短绒率.     

Enhanced oral absorption of salmon calcitonin-encapsulated PLGA nanoparticles by adding organic substances

Two organic compounds with potential absorption enhancing effects, bile acids and transferrin, were examined by the gastro-intestinal (GI) absorption of therapeutic salmon calcitonin (sCT) as encapsulated by poly(lactide-co-glycolide) (PLGA) for the treatment of osteoporosis. The sCT-loaded PLGA nanocapsules were prepared by O/W emulsification approach. Either additive of a designated content was mixed with sCT dissolved in methanol. For bile acids, their content (0–7.5 mg to sCT 6 mg) was observed to have a substantial effect both on the emulsification process and the encapsulation efficiency. When 1.5 mg of bile acids was added, sCT-loaded PLGA nanocapsules of about 700 nm in diameter and with a fairly high encapsulation efficiency greater than 35% were produced. Accordingly, this formulation gave the most significant hypocalcemic effect in an in vivo experiment with SD rats. On the other hand, a too high bile acids loading resulted in a poor encapsulation efficiency of less than 7%. Two principal roles of bile acids were proposed: emulsifying agent and absorption enhancer. Transferrin, a human glycoprotein of 80 kDa molecular weight, turned out to have potential as absorption enhancer as well.     

Mood,Posture and Rhythmic Feedback: MONAD Studio's Sonic Experiments with 3D-Printed Musical Instruments

Engaging with physical sensations is a primary method of transmitting mood through design. Based in North Miami Beach, Florida, design research practice MONAD Studio has been collaborating with musicians, composers and luthiers to explore new paths for architecture where aural, visual and tactile stimuli come together. Eric Goldemberg , co-founder with Veronica Zalcberg of MONAD Studio, here describes the enigmatic and highly charged results of the collaboration, which use pulsation and morphology to add more sensory and even erotic dimensions to our perception of space.     

CDN网络路由技术

简单介绍了CDN的概念、产生的背景,对CDN的网络体系机构作了简单的描述。CDN路由技术是CDN网络体系中的重要元素。基于DNS的路由是目前CDN路由采用的技术。基于名字的CDN路由是一项崭新的内容路由技术。主要涉及浙江大学CDN实验室目前对CDN路由技术的研究。     

ChangeSpider:一个自适应的网页信息跟踪系统

网页信息的更新是网络一个非常重要的性质。同网络的其他应用类似,随着WWW信息内容更新的不断加快,如何有效地跟踪特定网站和页面的更新情况日渐成为人们关心的课题。论文讨论一个自适应的网页信息跟踪系统ChangeSpider,研究其体系结构、关键技术等方面的内容。实验表明ChangeSpider能够有效地跟踪网页的信息变化,及时地将变化的内容提交给用户。     

车载自组织网络自私节点的检测与激励

在城市交通环境中,车辆安全驾驶问题日益严重,不同的车辆属于不同的私人用户,因此,在车辆行驶过程中就呈现出不同的自私性,自私性超过一定界限后会严重影响车载自组织网络通信。在车载网络环境恶劣的情况下,从车辆主观方面进行研究,设计并实现基于时间惩罚机制的激励机制,促使网络中的自私节点积极参与合作,提高网络投递率,改善网络环境。通过实验,从包的投递率和自私节点比例两个方面来验证机制的有效性和可行性。