用棉秆生产挂面牛皮箱纸板

本论文着重讨论了用棉秆生产挂面牛皮箱纸板的生产工艺条件.论文中对棉秆原料进行了化学成分分析,探讨了棉秆制KP化学浆的制浆工艺条件,以及用棉秆化浆做面浆、AMP(碱处理机械浆)做底浆生产挂面牛皮箱纸板时不同浆料配比对成纸质量的影响.     

红麻半化学浆试制牛皮箱纸板的研究

本文论述了对红麻全杆及红麻芯杆分别在实验室试制牛皮箱纸板的研究。研究结果表明:红麻全杆及红麻芯杆经适宜的化学方法和工艺条件处理后,再经高浓磨浆,制得的半化学浆以不同的配比代替本色木浆挂面,试制的牛皮箱纸板各项技术指标均可达到国家标准要求。     

硫酸盐浆原纤维对牛皮箱纸板强度的贡献

近期一项实验表明．硫酸盐浆原纤维抄造的较低定量牛皮箱纸板制成的瓦楞纸箱耐压强度性能优于含二次纤维定量较高的漂白浆挂面粗纸板（WLC）制成的瓦楞纸箱。瓦楞纸箱采用较高强度和较低定量的牛皮箱纸板制造可以降低成本。     

硫酸盐浆原纤维对牛皮箱纸板强度的贡献

近期一项实验表明,硫酸盐浆原纤维抄造的较低定量牛皮箱纸板制成的瓦楞纸箱耐压强度性能优于含二次纤维定量较高的漂白浆挂面粗纸板（WLC）制成的瓦楞纸箱。瓦楞纸箱采用较高强度和较低定量的牛皮箱纸板制造可以降低成本。     

亚铵法棉秆浆生产牛皮箱纸板通过中试鉴定

亚铵法棉秆浆生产牛皮箱纸板是山东省造纸研究所和阳谷造纸厂的科研项目。他们在小试的基础上,在阳谷纸厂进行了中试,中试规模为年产5000吨。试验结果说明,用20％硫酸盐木浆挂面的亚铵法棉秆浆生产的牛皮箱纸板,其质量全部达到了预定的指标。由该产品制成的水果,啤酒、轻骑车等包装箱,经试用质量符     

M—real公司对牛皮挂面纸板进行研究性试验

M—realConsumerPackaging公司最近进行的实验证实：低定量原生纤维挂面牛皮纸板,比高定量漂白浆挂面粗纸板（WLC）或含有二次纤维的挂面纸板制成的瓦楞纸箱具有更高的抗压强度。在瓦楞纸箱中使用具有更高强度和更低定量的牛皮箱纸板,可使产品在降低成本的同时实现可持续发展。     

红麻芯杆半化学浆蒸煮工艺条件的优化研究

本应用部分正交多基式回归设计方法,对红 芯杆半化学浆制牛皮箱纸板的蒸煮工艺条件进行了研究,建立了蒸煮工艺参数对纸浆得率,耐破指数,环压指数及耐折度等指标的回归数学模型,通过最优化计算,找到了牛皮箱纸板的物理强度达到国家Ａ级标准且纸浆得率较高的最优蒸煮工艺条件。     

对纸板机流浆系统流程的浅见

从80年代后期起，我国牛皮箱纸板（含挂面牛皮箱纸板）生产发展很快，新建纸厂、纸机和改造纸机不少，根据笔者对几十家生产厂家的考察、了解，牛皮箱纸板生产的纸机流浆系统流程设计是个不容忽视的问题。现对此谈几点浅见，与造纸同行共同探讨。1几种纸机流浆系统流程的比较国     

中国造纸工业技术与装备六十年的发展和进步系列报道包装用纸抄造技术

包装纸板分为箱纸板、白纸板和瓦楞原纸三大类. 箱纸板又分为普通箱纸板(Testliner)和牛皮箱纸板(Kraftliner),牛皮箱纸板又称牛皮挂面箱纸板、牛皮卡纸.箱纸板一般由面、芯、底三层组成.普通箱纸板主要以废纸箱(OCC)为原料,采用OCC浆中分级出来的长纤维挂面.     

关于箱纸板的质量

我厂于1988年投产了一台以废纸为主要原料,日产30吨,抄宽为1880毫米的多圆网多缸纸板机。产品有普通箱纸板、单挂面牛皮箱纸板和双挂面牛皮箱纸板。经过几年的生产实践,我们摸索出以废纸为主要原料生产牛皮箱纸板的经验,下面就如何提高牛皮箱纸板的质量谈几点体会。     

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.     

Textural Properties of Cold-set Gels Induced from Heat-denatured Whey Protein Isolates

A 9% whey protein (WP) isolate solution at pH 7.0 was heat-denatured at 80°C for 30 min. Size-exclusion HPLC showed that native WP formed soluble aggregates after heat-treatment. Additions of CaCl2 (10–40 mM), NaCl (50–400 mM) or glucono-delta-lactone (GDL, 0.4–2.0%, w/v) or hydrolysis by a protease from Bacillus licheniformis caused gelation of the denatured solution at 45°C. Textural parameters, hardness, adhesiveness, and cohesiveness of the gels so formed changed markedly with concentration of added salts or pH by added GDL. Maximum gel hardness occurred at 200 mM NaCl or pH 4.7. Increasing CaCl2 concentration continuously increased gel hardness. Generally, GDL-induced gels were harder than salt-induced gels, and much harder than the protease-induced gel.     

Occurrence of bisphenol-F-diglycidyl ether (BFDGE) in fish canned in oil

The levels of bisphenol-F-diglycidyl ether (BFDGE) were quantified as part of a European survey on the migration of residues of epoxy resins into oil from canned fish. The contents of BFDGE in cans, lids and fish collected from all 15 Member States of the European Union and Switzerland were analysed in 382 samples. Cans and lids were separately extracted with acetonitrile. The extraction from fish was carried out with hexane followed by re-extraction with acetonitrile. The analysis was performed by reverse phase HPL C with fluorescence detection. BFDGE could be detected in 12% of the fish, 24% of the cans and 18% of the lids. Only 3% of the fish contained BFDGE in concentrations considerably above 1mg/kg. In addition to the presented data, a comparison was made with the levels of BADGE (bisphenol-A-diglycidyl ether)analysed in the same products in the context of a previous study.     

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.     

Contribution of European research to risk analysis

The European Commission's, Quality of Life Research Programme, Key Action 1—Health, Food & Nutrition is mission-oriented and aims, amongst other things, at providing a healthy, safe and high-quality food supply leading to reinforced consumer confidence in the safety of European food. Its objectives also include the enhancing of the competitiveness of the European food supply. Key Action 1 is currently supporting a number of different types of European collaborative projects in the area of risk analysis. The objectives of these projects range from the development and validation of prevention strategies including the reduction of consumers risks; development and validation of new modelling approaches; harmonization of risk assessment principles, methodologies, and terminology; standardization of methods and systems used for the safety evaluation of transgenic food; providing of tools for the evaluation of human viral contamination of shellfish and quality control; new methodologies for assessing the potential of unintended effects of genetically modified (genetically modified) foods; development of a risk assessment model for Cryptosporidium parvum related to the food and water industries; to the development of a communication platform for genetically modified organism, producers, retailers, regulatory authorities and consumer groups to improve safety assessment procedures, risk management strategies and risk communication; development and validation of new methods for safety testing of transgenic food; evaluation of the safety and efficacy of iron supplementation in pregnant women; evaluation of the potential cancer-preventing activity of pro- and pre-biotic ('synbiotic') combinations in human volunteers. An overview of these projects is presented here.     

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