高纤维低糖南瓜黄秋葵蛋糕的研制

以南瓜、黄秋葵为原料,研制高纤维低糖南瓜黄秋葵蛋糕。通过单因素和正交试验设计优化了高纤维低糖南瓜秋葵纤维蛋糕的最佳配方:面粉用量100 g、鲜鸡蛋150 g、添加50 g麦芽糖醇、20 g蛋糕油、70 g黄秋葵泥、15 g南瓜泥。烘焙温度为上火160℃,下火170℃,烘焙时间为17 min,烘焙出的蛋糕综合感官评价最佳。     

低糖南瓜荞麦蛋糕的研制

试验旨在研制适合糖尿病患者、高血糖及高血脂人群食用的低糖营养蛋糕。通过单因素试验、正交试验及方差分析研制出了低糖南瓜荞麦蛋糕,并确定了其最佳配方和制作工艺。最佳配方为(以百克面粉为基数):鲜鸡蛋150 g、蛋糕油5 g、木糖醇30 g、蛋白糖0.8 g、南瓜粉荞麦粉合计10 g(比例3︰1)、黄原胶0.075 g。焙烤工艺:先预热至180℃,烘烤10 min,关底火,开面火维持200℃,至蛋糕表面为金黄色。由此制作的蛋糕营养丰富、糖含量低、清香美味、口感细腻,适合特殊人群及普通人食用。     

高纤维低糖南瓜抹茶蛋糕的工艺研究

本文对高纤维低糖南瓜抹茶蛋糕配方工艺进行了研究,在单因素试验基础上经正交试验确定了产品的最佳配方工艺为:蛋糕粉100%,大豆膳食纤维10%,元贞糖10%,鲜鸡蛋330%,蛋糕油5%,泡打粉4%,南瓜粉12%,抹茶粉3%,打蛋时间为12 min,上火180℃下火200℃烘烤13 min。     

南瓜戚风蛋糕制作工艺及其影响因素

南瓜,原产于北美洲,现世界各地普遍栽培,在我国,南北方均可广泛种植,内涵蛋白质、胡萝卜素、维生素B、维生素C和钙、磷等成分,营养价值丰富,有润肺益气,化痰排脓,美容抗痘等功效。而戚风蛋糕是以鸡蛋、面粉、糖、色拉油等材料为基础制作而成的一款糕点,因味道浓香,口感松软而深受人们喜爱,在我国的糕点市场上占有着非常大的份额。将南瓜加入到戚风蛋糕的制作中去,减少配方中油脂与糖的含量,不仅可以降低制作戚风蛋糕的成本,还可增加蛋糕的营养价值,是人们追求低糖少脂类糕点的最佳良品,相较于普通蛋糕,南瓜戚风蛋糕更加的营养健康。     

响应面法优化低糖茯苓蛋糕品质改良剂的研究

研究不同品质改良剂对低糖茯苓蛋糕品质的影响,结果表明,低糖茯苓蛋糕中添加黄原胶0.15%、脂肪酶0.01%、木聚糖酶0.25%,能增大蛋糕比容、硬度减小、弹性增大、咀嚼性下降,辅助提高低糖茯苓蛋糕的品质。     

降低低糖南瓜脯水分活度的研究

研究了氯化钠、柠檬酸、壳聚糖、丙二醇、丙三醇和磷酸二氢钠等添加剂对低糖南瓜脯水分活度(aw)的影响,并通过正交试验筛选出降低南瓜脯aw的添加剂组合。结果表明,降低低糖南瓜脯aw的强弱顺序依次为丙二醇>柠檬酸>氯化钠>丙三醇>壳聚糖>磷酸二氢钠,0.2%柠檬酸和1.0%丙二醇具有较强的协同降低果脯aw的作用,能将低糖南瓜脯aw降低至0.60以下。     

新型南瓜月饼的试制

初步探讨了以低糖南瓜果酱为馅料主体的新型月饼的加工工艺。结果表明,馅料的最佳配比为以低糖南瓜果酱为100%计,南瓜精粉8%、熟面粉17%、奶油6%,通过恰当的烘焙工艺,制成了热量较低、富含南瓜营养成分的新型月饼。     

高纤维低糖蛋糕的研制及其营养评价

针对传统蛋糕高糖、高能量的缺点,以大豆豆渣粉和甜菊糖代替部分低筋面粉和蔗糖进行蛋糕加工,制作成高纤维低糖蛋糕,并对其营养进行分析及感官评价。结果表明:与普通蛋糕相比,添加大豆豆渣粉和甜菊糖的高纤维低糖蛋糕的蛋白质和粗纤维含量随大豆豆渣添加量的增加而提高,总糖含量随甜菊糖添加量的增加而降低,当大豆豆渣添加量为10%,甜菊糖添加量为0.10%时,高纤维低糖蛋糕的风味口感最好,营养较丰富。     

抹茶低糖蛋糕加工工艺研究

以抹茶粉、木糖醇、白砂糖、低筋面粉为原料,采用单因素、响应面法对抹茶低糖蛋糕加工工艺进行研究,研究结果表明抹茶低糖蛋糕的最佳工艺为:抹茶粉3.2 g、木糖醇51 g、白砂糖49 g、低筋面粉100 g、蛋白液170 g、蛋黄90 g、纯牛奶75 g、色拉油60 g、玉米淀粉10 g,烘焙温度162℃,烘焙时间33 min,在此条件下能烘焙出口感好、风味好且低糖的抹茶低糖蛋糕,感官得分92±1.71,为蛋糕研发市场提供参考价值。     

响应面优化南瓜山药保健蛋糕工艺

以南瓜粉、山药粉、大豆低聚糖为原料制作保健蛋糕,用响应曲面法优化加工工艺.结果表明,南瓜山药保健蛋糕最佳加工工艺为以蛋糕专用粉质量为基准,南瓜粉山药粉(质量比1∶1)添加量32.24％,大豆低聚糖添加量90.18％,蛋糕油添加量12.15％.此时,制得的产品色泽金黄,有南瓜特有香气,松软爽口,感官得分最佳.     

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.     

An internet compendium of analytical methods and spectroscopic information for monomers and additives used in food packaging plastics

An internet website (http://cpf.jrc.it/smt/) has been produced as a means of dissemination of methods of analysis and supporting spectroscopic information on monomers and additives used for food contact materials (principally packaging). The site which is aimed primarily at assisting food control laboratories in the European Union contains analytical information on monomers, starting substances and additives used in the manufacture of plastics materials. A searchable index is provided giving PM and CAS numbers for each of 255 substances. For each substance a data sheet gives regulatory information, chemical structures, physico-chemical information and background information on the use of the substance in particular plastics, and the food packaging applications. For monomers and starting substances (155 compounds) the infra-red and mass spectra are provided, and for additives (100 compounds); additionally proton NMR are available for about 50% of the entries. Where analytical methods have been developed for determining these substances as residual amounts in plastics or as trace amounts in food simulants these methods are also on the website. All information is provided in portable document file (PDF) format which means that high quality copies can be readily printed, using freely available Adobe Acrobat Reader software. The website will in future be maintained and up-dated by the European Commission's Joint Research Centre (JRC) as new substances are authorized for use by the European Commission (DG-ENTR formerly DGIII). Where analytical laboratories (food control or other) require reference substances these can be obtained free-ofcharge from a reference collection housed at the JRC and maintained in conjunction with this website compendium.     

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