中草药添加剂对泌乳期奶山羊抗氧化能力的影响

为探讨中草药添加剂对泌乳期奶山羊抗氧化能力的影响,实验测定了奶山羊血清和乳腺组织中的超氧化物歧化酶（SOD）、谷胱甘肽过氧化物酶（GSH-Px）、过氧化氢酶（CAT）活性和丙二醛（MDA）质量分数。结果表明,中药组奶山羊血清和乳腺组织中SOD、GSH-Px和CAT活性高于或显著高于正常对照组（P〉0．05,P〈0．05,P〈0．01）,MDA质量分数低于或显著低于正常对照组（P〉0．05,p〈0．05,P〈0．01）。中草药添加剂能减少脂质过氧化产物MDA的生成,同时提高奶山羊抗氧化酶活性,增强了奶山羊的抗氧化能力。     

麦胚黄酮抗动脉粥样硬化体内机制的研究

研究不同剂量的麦胚黄酮（Flavonoids of Wheat Germ）对高脂血症大鼠血清和肝脏中胆固醇（TC）、甘油三酯（TG）、高密度脂蛋白胆固醇（HDL-C）、肝体比值以及血清中超氧化物歧化酶（SOD）、谷胱甘肽过氧化物酶（GSH—Px）和脂质过氧化物（LPO）的影响。结果表明，麦胚黄酮可明显地降低大鼠血清和肝脏中TC、TG的含量（P〈0．01，P〈0．05），提高HDL—C的含量（P〈0．01），另外，麦胚黄酮对高脂血症大鼠具有较强的抗氧化作用，能显著降低血清和组织中LPO含量（P〈0．01），提高SOD和GSH—Px的活性（P〈0．05）。提示，麦胚黄酮具有治疗和预防动脉粥样硬化的作用。     

竹叶黄酮复方片的降脂实验研究

目的研究以竹叶黄酮为主,与决明子、柚子汁等不同成分优化组合,制备具有抗氧化活性和降脂功能的竹叶黄酮复方产品。方法建立高脂血症大鼠模型,根据总胆固醇水平随机分组,口服灌胃。实验组分别给予相应剂量的竹叶黄酮复方片（复方Ⅰ：竹叶黄酮、决明子、柚子汁和维生素C棕榈酸酯复配;复方Ⅱ：竹叶黄酮、决明子和柚子汁复配）和竹叶黄酮单方片,对照组灌胃相同体积的蒸馏水。实验结束后检测实验大鼠的血清总胆固醇（TC）、甘油三酯（TG）、高密度脂蛋白胆固醇（HDL-C）、低密度脂蛋白胆固醇（LDL-C）水平和血清总抗氧化活性、超氧化物歧化酶（SOD）和谷胱甘肽过氧化物酶（GSH-Px）活性及肝脏丙二醛（MDA）水平。结果药物干预6周后,竹叶黄酮复方Ⅰ可显著降低高脂血症大鼠血清的TC、TG、LDL—C水平,显著改善大鼠肝脏的脂肪沉积和变性状况;与高脂模型组比,竹叶黄酮复方Ⅰ和Ⅱ的血清总抗氧化能力、血清SOD活性均显著升高、优于竹叶黄酮单方实验组;此外,竹叶黄酮复方Ⅰ降低实验大鼠肝脏MDA水平的作用极显著（P〈0．01）,竹叶黄酮复方Ⅱ作用显著（P〈0．05）。结论竹叶黄酮与决明子和柚子汁复配,并添加维生素C棕榈酸酯后降脂协同增效作用显著,生物利用度提高,降低血脂和预防动脉粥样硬化的功效突出。     

普洱茶对实验大鼠血清中血脂水平和脂质过氧化的影响

目的:评价不同加工工艺的普洱茶对实验性高脂血症大鼠血清中血脂水平和脂质过氧化的影响.方法:将SD大鼠分为正常对照组、高脂模型组以及低、中、高剂量[即0.5g、1.5、3.0 g/(kg·bw)]的普洱生茶、普洱熟茶组.测定其血脂水平、血清中超氧化物歧化酶(SOD)和谷胱甘肽过氧化物酶(GSH-PX)的活性以及丙二醛(MDA)含量.结果:摄入不同加工工艺的普洱茶后,高脂血症大鼠血脂水平和动脉粥样硬化指数(AI)均较高脂模型组显著降低(P＜0.01),而血清SOD和GSH-PX活性明显增强,MDA的生成量显著减少.结论:不同加工工艺的普洱茶均具有降血脂和减缓脂质过氧化的作用,可以减少动脉粥样硬化的发生,且熟茶的功效较生茶好.     

葛根素干预对糖尿病运动大鼠血清抗氧化能力的影响

目的：研究运动及补充葛根素对糖尿病大鼠血清抗氧化能力的影响。方法：以注射链尿佐菌素诱导成年雄性SD大鼠成糖尿病模型,观察运动、补充葛根素、运动结合补充葛根素对糖尿病大鼠血清T—AOC、SOD、GSH、GSH—PX、CAT、MDA及胰岛素、血糖的影响。结果：各干预组血清T．AOC、SOD、GSH、GSH—PX、CAT及胰岛素水平均显著高于糖尿病安静组（p〈0．05）,MDA含量及血糖浓度显著低于糖尿病安静组（p〈O．05）,其中补充葛根素＋运动组较补充葛根素组和运动组也有显著性差异（p〈0．05）。结果表明：运动和补充葛根素均可提高糖尿病大鼠血清抗氧化酶活性,降低脂质过氧化程度,改善胰岛素和血糖水平,而以运动结合补充葛根素效果更加显著。     

青刺果油对大鼠脂代谢的药理研究

在高脂造模中系统地研究了青刺果油（Prinsepia utilis Royle Oil）对wistar高血脂大鼠血清总胆固醇（TC）、血清总甘油三脂（TG）、高密度脂蛋白胆固醇（HDL-c）、低密度脂蛋白胆固醇（LDL-c）、肝脂酶（HL）活性、脂蛋白脂肪酶（LPL）活性以及肝脏中脂肪含量、粪便中脂质含量、肝质量／体质量比值的影响。与模型组相比，青刺果油能显著降低大鼠TC（P〈0．01）、TG（P〈0．05）、肝脏脂肪含量、粪便中脂质含量，同时显著升高HDL-C（P〈0．01）、HL酶活性（P〈0．05）。青刺果油具有调节血脂作用，是一种较为理想的功能性保健食用油。     

酸马奶中乳杆菌MG2-1株的抗氧化作用研究

应用分离自酸马奶,并经过耐酸性实验、人工胃肠消化液中存活能力筛选的L.acidophilus MG2-1,制备成热致死菌体和活菌制剂后灌服大鼠至28 d,测定大鼠肝脏组织匀浆和血清SOD,GSH-PX活力和MDA含量.结果表明,活菌制剂能够使大鼠肝脏组织匀浆中SOD活力和GSH-PX活力活力均明显提高,与对照组比较分别达到显著（P＜0.05）和极显著（P＜0.01）水平;大鼠血清中GSH-PX活力显著提高（P＜0.05）.L.acidophilus MG2-1活菌制剂能够显著地降低大鼠血液和肝脏组织匀浆中MDA含量（P＜0.05）.L.acidophilus MG2-1活菌制剂的抗氧化作用优于热致死菌体制剂.本研究证明来源于传统酸马奶的乳杆菌具有一定的抗氧化生理活性作用.     

大豆黄酮对机体疲劳应激下抗氧化能力的影响

以26名健康大学生志愿者为受试对象，采用逐级递增负荷疲劳运动方式，研究大豆黄酮对机体疲劳应激下抗氧化能力的影响。结果显示，疲劳运动后人体血清CAT、SOD酶活性有所增加，而GSH-Px酶活性显著升高（p〈0．05），血清MDA含量有所升高；服用大豆黄酮后进行疲劳应激，三种抗氧化酶活性均升高，且均稍高于对照组应激后水平，其中GSH-Px活性显著高于服用前（p〈0．05），SOD活性极显著高于服用前（p〈0．01），显著高于服用后（p〈0．05），MDA含量几乎没有较多变化，且与对照组应激后水平相比有所降低。结果表明，大豆黄酮能明显增强应激机体的抗氧化能力，减少应激机体的自由基产生，具有一定的抗应激效应。     

大豆异黄酮和牛初乳复合制剂对去卵巢大鼠骨密度及子宫组织抗氧化作用的研究

目的：探讨大豆异黄酮和牛初乳制剂（复合制剂）对去卵巢大鼠骨密度及子宫超氧化物歧化酶（SOD）活性、丙二醛（MDA）和谷胱甘肽（GSH）含量的影响。方法：大鼠去卵巢建立骨质疏松症模型，连续灌胃给予复合制剂三个月，测定胫骨骨密度及骨钙、磷、锌含量，测定子宫MDA、GSH含量、子宫SOD活性。梯度胶电泳分离子宫SOD同工酶，分析SOD谱带活性。结果：大鼠建模后，骨密度及骨钙、磷、锌含量均低于正常对照组，给予复合制剂后，各剂量组骨密度和骨钙、磷、锌含量均升高，其中高、中剂量组的骨重、骨密度、骨矿盐密度和中剂量组的骨钙密度与模型相比，差异有显著性；中、低剂量组的骨钙、磷和低剂量组的骨锌，显著高于模型组。去卵巢大鼠子宫MDA含量明显升高，GSH含量显著下降，给予复合制剂后，中剂量组MDA含量下降明显，GSH含量增加，与模型组比差异有显著性。模型组子宫SOD活性显著低于对照组，给予复合制剂后能显著提高中剂量组子宫SOD比活性、Mn-SOD活性和高剂量组SOD比活性。大鼠子宫有三种SOD同工酶，去卵巢后同工酶活性都受到了明显抑制，给予复合制剂后，中、低剂量组的SOD同工酶活性恢复明显。复合制剂含有类SOD活性为3492U／g。结论：复合制剂能增加去卵巢大鼠骨密度，抑制骨量丢失，提高子宫组织抗氧化损伤能力，对骨质疏松症有较好的改善作用。     

共轭亚油酸对缺氧损伤的保护作用

为了探讨共轭亚油酸(CLA)对缺氧损伤的保护作用,40只SD大鼠随机分为4个组:1%CLA组、1%CLA缺氧组、空白对照组和空白缺氧组。CLA组和空白对照组用1%CLA和蒸馏水分别连续灌胃4周,剂量为20ml/kg/d。灌胃结束后,1%CLA缺氧组和空白缺氧组大鼠在5000m海拔高度下,连续缺氧15d,每天8h,然后测定各组大鼠脏器/体重比、血清SOD和GSH-PX活性以及MDA含量。结果发现,在缺氧条件下,大鼠脏器/体重比显著增大(p<0.05),SOD和GSH-PX活性显著下降(p<0.05),MDA含量明显升高(p<0.05)。1%CLA缺氧组大鼠脏器/体重比、血清SOD和GSH-PX活性以及MDA含量与正常大鼠无明显差异(p>0.05)。上述结果说明,1%CLA对缺氧损伤具有明显的保护作用。     

Reliable identification of grapevine rootstock varieties using RAPD PCR on woody samples

Since grapevine ( Vitis spp .) rootstock material is being traded increasingly as disbudded woody material a lack of distinctive morphological features on such material necessitates an alternative and reliable means of identification. Methods described here were developed for rapid and efficient extraction of DNA from woody samples rich in phenolic compounds and polysaccharides, and for subsequent identification of varieties by RAPD PCR. Using these methods, and with the application of only one selected RAPD primer, we were able to differentiate sixteen rootstock varieties, including the seven varieties most commonly used in Germany. Problems commonly encountered with reproducibility of RAPD patterns were avoided by choosing primers with a dinucleotide sequence and a high G/C content that allowed a rather high annealing temperature of 45°C. Methods described here should also be useful for other horticultural crops, especially those with woody tissues rich in phenolic compounds and polysaccharides.     

Aroma characterization of various apricot varieties using headspace–solid phase microextraction combined with gas chromatography–mass spectrometry and gas chromatography–olfactometry

The characterization of the aromatic profile of several apricot cultivars with molecular tracers in order to obtain objective data concerning the aromatic quality of this fruit was undertaken using headspace–solid phase microextraction (HS–SPME). Six apricot cultivars were selected according to their organoleptic characteristics: Iranien, Orangered, Goldrich, Hargrand, Rouge du Roussillon and A4025. The aromatic intensity of these varieties measured by HS–SPME–Olfactometry were defined and classified according to the presence and the intensity of grassy, fruity and apricot like notes. In the six varieties, 23 common volatile compounds were identified by HS–SPME–GC–MS. Finally, 10 compounds, ethyl acetate, hexyl acetate, limonene, β-cyclocitral, γ-decalactone, 6-methyl-5-hepten-2-one, linalool, β-ionone, menthone and (E)-hexen-2-al were recognized by HS–SPME–GC–O as responsible of the aromatic notes involved in apricot aroma and considered as molecular tracers of apricot aromatic quality which could be utilized to discriminate apricot varieties.     

Tests of potential functional barriers for laminated multilayer food packages. Part I: Low molecular weight permeants

The advent of the functional barrier concept in food packaging has brought with it a requirement for fast tests of permeation through potential barrier materials. In such tests it would be convenient for both foodstuffs and materials below the functional barrier (sub-barrier materials) to be represented by standard simulants. By means of inverse gas chromatography, liquid paraffin spiked with appropriate permeants was considered as a potential simulant of sub-barrier materials based on polypropylene (PP) or similar polyolefins. Experiments were performed to characterize the kinetics of the permeation of low molecular weight model permeants (octene, toluene and isopropanol) from liquid paraffin, through a surrogate potential functional barrier (25 μm-thick oriented PP) into the food simulants olive oil and 3% (w/v) acetic acid. These permeation results were interpreted in terms of three permeation kinetic models regarding the solubility of a particular model permeant in the post-barrier medium (i.e. the food simulant). The results obtained justify the development and evaluation of liquid sub-barrier simulants that would allow flexible yet rigorous testing of new laminated multilayer packaging materials.     

Analysis of benzo[a]pyrene in spiked fatty foods by second derivative synchronous spectrofluorimetry after microwave-assisted treatment of samples

A simple, rapid and inexpensive method has been developed for the determination of benzo[a     

The development of reference materials for paralytic shellfish poisoning toxins in lyophilized mussel. II: Certification study

This paper describes the second part of a project undertaken to develop certified mussel reference materials for paralytic shellfish poisoning toxins. In the first part two interlaboratory studies were undertaken to investigate the performance of the analytical methodology for several PSP toxins, in particular saxitoxin and decarbamoyl-saxitoxin in lyophilized mussels, and to set criteria for the acceptance of results to be applied during the certification exercise. Fifteen laboratories participated in this certification study and were asked to measure saxitoxin and decarbamoyl-saxitoxin in rehydrated lyophilized mussel material and in a saxitoxin-enriched mussel material. The participants were allowed to use a method of their choice but with an extraction procedure to be strictly followed. The study included extra experiments to verify the detection limits for both saxitoxin and decarbamoyl-saxitoxin. Most participants (13 of 15) were able to meet all the criteria set for the certification study. Results for saxitoxin.2HCl yielded a certified mass fraction of <0.07 mg/kg in the rehydrated lyophilized mussels. Results obtained for decarbamoyl-saxitoxin.2HCl yielded a certified mass fraction of 1.59+/-0.20 mg/kg. The results for saxitoxin.2HCl in enriched blank mussel yielded a certified mass fraction of 0.48 +/- 0.06 mg/kg. These certified reference materials for paralytic shellfish poisoning toxins in lyophilized mussel material are the first available for laboratories to test their method for accuracy and performance.     

Announcing a new international peer-reviewed journal:Food Science and Human Wellness now accepting manuscript submission in English

<正>We are pleased to announce the launch of a new international peer-reviewed journal-Food Science and Human Wellness,ISSN 2213-4530,which is an open access journal,produced and hosted by Elsevier B.V.on behalf of Beijing Academy of Food Sciences.Food Science and Human Wellness is an international peer-reviewed English journal that provides a forum for the dissemination of the     

Chinese CTP Market

According to Printing and Printing Equipment Industries Association of China（PEIAC）＇s statistics to the plate manufucturer in China, in 2013, the actual offset plate production has reached 346 million square meters in China. Among them, the CTP production volume was 245 million square meters, up by 11% than that of last year; the total sales of the CTP plate was 239 million square meters, up by 13%.     

Preparatory Work of Print China 2015 is Going Smoothly

正Held at Guangdong Modern International Exhibition Center,Print China 2015 will cover 7exhibition halls,besides the original Hall No.3,4,5,6,7,the newly built F zone of Hall 3 will be used too.The total area will be140,000 square meters.Hall 3:Offset and large printing equipment,package printing equipment,post press     

INFOPRINT 2014 was Successfully Held in Dongguan

Sponsored by Printing and Printing Equipment Industries Association of China （PEIAC） and organized by Print China magazine, the Seventeenth Beijing International Printing Information Conference （INFOPRINT 2014） was successfully held on 11th Dec. 2014 at Dongguan Exhibition International Hotel.