豆渣脆片的研制

研究了豆渣脆片的配方和制作工艺,确定豆渣粉添加到面粉中最佳比例为面粉量的15％,糖油比为1:1.5,疏松剂添加量为1.2％,强筋剂用量为1％,变性淀粉用量为15％。焙烤方式为在远红外烤箱中100℃左右焙烤30min。     

牛奶豆渣馒头配方及工艺研究

将豆渣用于馒头制作是豆渣应用的一个新途径。采用单因素试验和正交试验,确定豆渣粉与面粉的最佳质量比以及最佳的工艺条件,并采用感官评价对豆渣馒头品质进行分析。通过正交试验得出牛奶豆渣馒头的最佳配方为面粉与豆渣粉的最佳质量比80∶20,牛奶用量60%,酵母用量1%,砂糖5%,奶粉6%。面团发酵的工艺参数都为温度28℃,相对湿度75%,发酵时间30 m in,蒸制时间12 m in。     

添加豆渣对苏打饼干制作过程及品质的影响

以黄豆渣和低筋面粉为原料,制作无糖苏打饼干。通过添加不同比例的豆渣粉,来探究豆渣对面粉品质、饼干制作过程以及饼干成品品质的影响。结果表明,添加6%~12%的豆渣可以改善面粉的粉质特性,使其更适合做饼干。添加豆渣会增大面粉的糊化焓。通过与纯面粉对比发酵率、烘烤时间、烘烤胀发比,发现添加3%~6%的豆渣可以促进面团发酵,添加6%~12%的豆渣可以减短饼干烘烤时间,增大烘烤胀发率。结合质构和感官评价,得出添加9%的豆渣,饼干的口感和质构特性最佳。     

菠萝豆渣面包的研制

豆渣是豆类加工的副产品,将豆渣处理后添加到面包粉中,配以菠萝可以制成富含膳食纤维且具有营养保健功能的面包。试验研究了豆渣、白砂糖、奶粉、酵母添加量对面包品质的影响,通过单因素和正交试验确定菠萝豆渣面包的最佳的配方是:以面包粉为基础,豆渣添加量为8%,菠萝的添加量为20%,奶粉9%,酵母1.5%,白砂糖10%,黄油5%,酵母改良剂1.5%,食盐1%。制得的面包松软适中且有菠萝的清香味,为豆渣资源的合理利用提供了一条有效的途径。     

豆渣窝头的研制

以豆制品副产物豆渣为原料经过预处理后加入玉米粉和中筋面粉制作窝头,通过单因素试验确定产品的主要影响因素及水平。以感官评估为指标,通过正交试验得到豆渣窝头最佳工艺条件为:玉米粉添加量30.8%、预处理豆渣添加量30.0%、中筋面粉添加量10.3%(玉米粉∶中筋面粉=3∶1)、糖粉添加量14%、酵母添加量0.4%。     

豆渣饼干的研制

以大豆渣和低筋面粉为主要原料研制含有豆渣的饼干。通过单因素试验和正交试验确定豆渣饼干的最佳配方参数。结果表明:制作豆渣饼干的最佳配方是豆渣粉∶低筋面粉质量比20∶80、泡打粉添加量1.8%、绵白糖添加量30%、全脂奶粉添加量5%、花生油添加量12%,最佳烘烤温度是180℃、烘烤时间为6 min。按照此法制作的豆渣饼干口感松脆,色泽金黄,有较好的豆香味。     

响应面法优化黄芪枸杞营养面包工艺研究

本研究主要采用单因素试验,探究了黄芪粉添加量、枸杞粉添加量、酵母添加量和烘烤时间对于黄芪枸杞营养面包(Astragalus-Lyciumnutritionalbread,ALNB)品质的影响,并以感官评价作为响应值,采用响应面法,优化ALNB的最佳工艺配方。结果表明：ALNB的最佳配方为高筋面粉125 g、黄芪1.8 g、枸杞粉5 g、黄油用量10 g、水用量65 g、食盐用量1.5 g、全蛋液用量25 g、酵母用量1.5 g、奶粉8 g、白砂糖用量15 g、烘烤时间15min。在此条件下的ALNB品质最佳,色泽呈棕黄色,切面组织细密,口感香甜且松软,感官评分高达92.74。本研究成功地将健康与美味结合,开创了烘焙食品的新趋势,对推动健康烘焙食品的发展具有积极的实践意义。     

豆腐渣在面包中的应用研究

豆腐渣是加工豆腐、豆浆等产品的副产物,富含膳食纤维、蛋白质等营养成分,将其添加到面包中能够改善面包的营养价值。研究了豆腐渣粉、谷朊粉、异抗坏血酸钠、葡萄糖氧化酶、α-淀粉酶、单硬脂酸甘油酯、黄原胶添加量对面包品质的影响,结果显示,豆腐渣粉替代面粉的量以10%为宜,添加8%的谷朊粉能够显著改善豆渣面包的品质,添加1～5mg/100g的葡萄糖氧化酶、0.6mg/100g的α-淀粉酶、0.6%的单硬脂酸甘油酯或0.4%的黄原胶对豆渣面包品质有一定的改良作用。豆腐渣面包的最佳配方为：面包粉90g、豆腐渣粉10g、谷朊粉8g、酵母1.5g、食盐1.0g、砂糖10g、单硬脂酸甘油酯0.6g。     

酶制剂在豆渣面包中的应用研究

通过烘焙实验,研究了添加豆渣粉、戊聚糖酶、脂肪酶、葡萄糖氧化酶对面包品质的影响。结果表明:酶制剂的加入,极大地改善了豆渣面包的品质,并使豆渣粉替代面粉的量由4%提高到8%以上;复合酶的效果好于单一酶,酶的复配比例与豆渣添加量有关。     

豆渣粉膳食纤维营养强化米的研制

为解决豆制品加工企业的豆渣副产物处理问题,研究以大米粉、糯米粉、豆渣粉、玉米粉为主要原料,以线性规划法为配方设计基础,以感官评分为评价指标,通过单因素试验及响应面试验确定最佳工艺配方:大米添加量50.97%,糯米粉添加量30.33%,豆渣粉添加量13.00%,玉米粉添加量5.70%。其后对产品进行质构测定及光学显微结构观察。结果表明,在加水量1~1.5倍条件下蒸煮的营养强化米表现出与天然大米较为相似的口感。     

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