Babcock和Krantz公司制造的新型挤压式预缩机

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1998年世界纸业要闻

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Influence of pectin modification on water binding properties

Water can be bound to food components and products as non-freezing, freezing-bound and free water. The interactions are crucial for any application as well as for food consumption and digestion. DSC was applied to examine the amounts of the different types of water bound to pectin, a biomacromolecule that is used as gelling and stabilising agent in many food products. One commercial high-methoxylated citrus pectin and three modified samples, prepared by acidic and alkaline demethoxylation as well as amidation, were tested. The water content of dry samples depended mainly on the molecular parameters, especially the content of hydrophilic groups at the galacturonic acid that was increased by demethoxylation and amidation, as well as on monovalent cations of the pectins. The water–pectin interactions of wetted materials were additionally influenced strongly by the availability of hydrophilic groups that depended on material properties such as amorphous or crystalline state, powder bulk and solid density and porosity as well as particle size, surface and porosity. Small amorphous porous particles, whose polar groups were rapidly available without prior softening and swelling, accelerated water uptake. Non-freezing and freezing-bound water, bound closely to the pectin molecules, depended on the number and type of polar groups. Free water, bound in micro- and macro-capillaries as well as voids within and between the pectin particles, was influenced by hydrophilic as well as hydrophobic groups of the samples. There was a strong impact of the pre-treatment during processing and modification.     

秋季草本养生饼的研制及其辅助降血脂作用的研究

基于中国传统医学"天人合一""四季养生"的理念,研究选用药食同源的原料,结合秋季燥邪当令的特点,以感官评分为指标,研制一款适合秋季调理的天然草本养生饼。采用单因素及正交试验确定并优化了秋季草本养生饼配方:馅以板栗仁质量为基准,加入山药9%,百合2%,藕粉4%,木糖醇20%,混合油(玉米油:黄油为1:1)10%;皮以白芸豆质量为基准,加入21%的混合粉(低筋面粉:乳粉为1:1),24%木糖醇,14%混合油(玉米油:黄油为1:1)。动物实验结果显示:原料提取液能显著降低高血脂小鼠血清中总胆固醇、甘油三酯、低密度脂蛋白含量(P<0.05)。     

干燥方法对金银花的质量影响研究

通过对金银花的不同干燥方法比较,干燥方法对金银花的质量有较大影响。在色泽方面,微波干燥和烘干的为绿色,晒干和真空干燥的为黄绿色,真空冷冻干燥的为褐色;在绿原酸的含量上,微波干燥的为5.93%,晒干的为5.17%,烘干的为5.53%,真空干燥的为3.95%,真空冷冻干燥的为3.35%;干燥后每g金银花的含菌量分别为:微波干燥的细菌总数2×103,晒干的为3.4×105,烘干的为1.4×105,真空干燥6×104,真空冷冻干燥为4×104。结果表明微波干燥最适合金银花的干燥。     

速溶枸杞粉的加工工艺研究

以枸杞浓缩浆为原料,异VC-Na、柠檬酸为护色剂,麦芽糊精和β-环状糊精为助干剂,CMC-Na为稳定剂,白砂糖为甜味剂,柠檬酸为酸味剂,蔗糖脂肪酸酯和单甘酯为乳化剂,使用喷雾干燥法生产速溶枸杞粉。采用正交试验确定最佳的枸杞粉加工工艺。     

Bacillus probiotics

Bacterial spore formers are being used as probiotic supplements for use in animal feeds, for human dietary supplements as well as in registered medicines. Their heat stability and ability to survive the gastric barrier makes them attractive as food additives and this use is now being taken forward. While often considered soil organisms this conception is misplaced and Bacilli should be considered as gut commensals. This review summarises the current use of Bacillus species as probiotics, their safety, mode of action as well as their commercial applications.     

Potential Benefits of Edible Berries in the Management of Aerodigestive and Gastrointestinal Tract Cancers: Preclinical and Clinical Evidence

Epidemiological reports as well as experimental studies have demonstrated the significant health benefits provided by regular berry consumption. Berries possess both prophylactic and therapeutic potential against several chronic illnesses, such as cardiovascular, neurodegenerative, and neoplastic diseases. Berries owe their health benefits to phytoconstituents, such as polyphenolic anthocyanins, ellagic acid, and a diverse array of phytochemicals bestowed with potent antioxidant and anti-inflammatory effects as well as the ability to engage a multitude of signaling pathways. This review highlights the principal chemical constituents present in berries and their primary molecular targets. The article presents and critically analyzes the chemopreventive and therapeutic potential of berry extracts, fractions, and bioactive components on various cancers of the gastrointestinal tract (GIT), including esophageal, stomach, intestinal, and colorectal cancers as well as cancers of the upper aerodigestive tract, such as oral cancer. The current status of clinical studies evaluating berry products in several aforementioned cancers is presented. Various emerging issues including dose-ranging and dosage forms, the role of synergy and the usage of combination therapy as well as other relevant areas essential for the development of berry phytoconstituents as mainstream chemopreventive and therapeutic agents against aerodigestive and GIT cancers are critically discussed.     

松香胺作功能单体阳离子无皂苯丙乳液表面施胶剂的研究

以丙烯腈改性淀粉作分散剂,苯乙烯（St）为硬单体,丙烯酸丁酯（BA）为软单体,松香胺（RA）为功能单体,甲基丙烯酸二甲基氨基乙酯（DM）为阳离子单体,丙烯酰胺（AM）为交联单体,过硫酸钾（K2S2O6）为引发剂,采用无皂乳液聚合技术合成了一种阳离子苯丙乳液表面施胶剂,并对施胶纸张各种性能做了测试。最佳合成工艺是：m（St）／m（BA）=2．5,w（RA）=0．5％,w（DM）=0．9％,w（AM）=0．4％,w（K2S2O8）=0．5％,m（单体）／m（淀粉）=2。     

生态织物整理剂--聚醚/氨基硅油的性能研究

以聚醚／氨基硅油中的哌嗪基聚醚硅油PEAS-1为例，对其性能与氨乙基氨丙基硅油ASO-1、羧基硅油CAS-2、聚醚／环氧硅油CGF。进行了比较研究．结果表明：PEAS-1能与阴离子树脂、助剂配伍使用，柔软效果虽然不及ASO-1好，但能赋予织物理想的吸湿性、抗静电性能和耐洗性．PEAS-1整理的织物．经0．5％的汰渍洗衣粉-水洗涤10次后，静态吸水时间仍可达到3s56，而且室温放置多日吸湿性变化不大．     

Biovanillin from agro wastes as an alternative food flavour

This review provides an overview of biovanillin production from agro wastes as an alternative food flavour. Biovanillin is one of the widely used flavour compounds in the foods, beverages and pharmaceutical industries. An alternative production approach for biovanillin as a food flavour is hoped for due to the high and variable cost of natural vanillin as well as the limited availability of vanilla pods in the market. Natural vanillin refers to the main organic compound that is extracted from the vanilla bean, as compared to biovanillin, which is produced biologically by microorganisms from a natural precursor such as ferulic acid. Biovanillin is also reviewed as a potential bioflavour produced by microbial fermentation in an economically feasible way in the near future. In fact, we briefly discuss natural, synthetic and biovanillin and the types of agro wastes that are useful as sources for bioconversion of ferulic acid into biovanillin. The subsequent part of the review emphasizes the current application of vanillin as well as the utilization of biovanillin as an alternative food flavour. The final part summarizes biovanillin production from agro wastes that could be of benefit as a food flavour derived from potential natural precursors.© 2012 Society of Chemical Industry     

环氧树脂阳离子无皂苯丙乳液用于纸张的表面施胶

以丙烯腈改性淀粉为分散剂,苯乙烯(St)、丙烯酸丁酯(BA)、甲基丙烯酸二甲基氨基乙酯(DM)为单体,丙烯酰胺(AM)为交联单体,环氧树脂(E-44)为功能单体,过硫酸钾(K2S2O8)为引发剂,采用无皂乳液聚合技术合成了一种阳离子苯丙乳液表面施胶剂,并对文化纸进行表面施胶。最佳合成工艺是:w(DM)=3%,m(St):m(BA)=3,w(AM)=4%,w(E-44)=0.3%,w(K2S2O8)=0.5%。