谈谈桃的贮藏保鲜

去年我省黄桃集中收获季节曾发生大量烂耗,有些地方的桃衣甚至出现砍树毁园,在一定程度上影响了生产的发展。因此桃的贮藏保鲜无论是从眼前还是从长远来看,都具有十分重要的意义。为此本刊特约请浙江农大食品系郑老师撰文谈谈桃应如何贮藏保鲜,以期在今年桃子大量收获时能对产区广大实际工作者有所参考,把桃的损失降低到最小程度。     

辐照食品保鲜技术的现状及前景

辐照食品保鲜技术，是利用射线辐照食品的方法以达到抑制发芽、杀虫灭菌、调节熟度、保持食品鲜度和卫生，延长货架期和贮存期，从而达到减少损失保存食品的目的。十八世纪初，法国科学家阿培尔发明了热处理法后，低温、干燥、糖渍、盐渍、烟熏等保鲜贮藏法相继问世，并得到大规模的应用。但这些方法都有其不足之处，如冷冻法能量消耗高，加热、干燥、浸渍法易改变食品原有风味，烟熏后的食品致癌物明显增加等等。     

枇杷果实采后贮藏保鲜技术研究进展

综述了近年来枇杷果实采后贮藏保鲜技术的研究进展,包括:物理保鲜,化学保鲜和生物保鲜.文中对应用性较强、易于产业化的保鲜方法作了详细阐述,并展望了未来枇杷保鲜技术的发展方向.     

辐照食品保鲜技术的现状与前景

综述了辐照食品保鲜技术的发展现状并对辐照食品保鲜技术的应用开发前景作了论述，结合韶关市的资源及地理位置，对在韶关地区建立食品辐照新源做了一定的合理性和可行性分析。     

葡萄贮藏保鲜技术研究进展

介绍了影响葡萄耐贮性的采前因素、常见的致病菌和贮藏条件，特别提出了灰霉葡萄孢引起的灰霉病是鲜食葡萄最具破坏性的病症．分别从冷藏、气调贮藏、保鲜剂应用、臭氧处理等几个方面对葡萄贮藏保鲜技术进行了分析和讨论，总结了近年来葡萄贮藏保鲜技术的研究现状和发展方向．     

切花保鲜的研究进展

对鲜切花衰老原因、切花保鲜剂及应用、切花保鲜贮藏、切花保鲜包装技术等问题进行了综述，总结和提出了多种切花保鲜，包装的方法和措施。     

果蔬贮藏保鲜技术现状及对策

保持果蔬质量与鲜度是人们追求的重要目标之一,是在果蔬贮存、运输、流通过程中必须解决的问题,其方式由最初的盐腌、熏烤、蒸煮、酸渍等,发展到科学技术进步的今天采取各种形式的保鲜技术。我国是果蔬生产大国,目前平均年产量近2亿吨,约占世界的五分之一,水果的产量已超过3千万吨,但是其损耗率在30％以上,这些损失,浪费了果蔬生产和流通的大量人力和物力。我国经过“六五”至     

甜瓜采后生理和贮藏保鲜研究进展

本文从采后甜瓜果实的物质变化规律入手，分析了影响甜瓜耐贮运性的因素．总结了国内外近年来所采用的各种贮藏保鲜技术，并进一步分析了我国在甜瓜贮藏保鲜方面存在的问题及相应解决方法。     

信阳毛尖茶常温保鲜技术研究

研究了信阳毛尖茶在常温条件下不同包装方式、茶叶不同含水量和不同保鲜处理对萘叶保鲜效果的影响，确定了信阳毛尖茶常温保鲜技术的最佳方式。     

果蔬保鲜新技术

果蔬保鲜,一直广为人们所重视。从某种意义上来说,甚至比生产果蔬更重要。它不仅能保证广大消费者在一年四季都能够吃到新鲜可口的果品蔬菜,还对避免因产期集中或贮运条件限制等原因造成的烂损,保护种植、加工、销售等各方面的积极性,促进生产的进一步发展具有特别重要的意义。由于果蔬都是具有生物活性的食品,要保持它们的鲜度和品质,必须抑制微生物的繁殖和农产品本身的生理活动。为了达到这一目的,目前世界各国对果蔬贮藏技术设备的研究都很重视,并取得了不少成果。最近     

Markedness and its Interpretation in Language Use

Language markedness is a common phenomenon in languages, and is reflected from hearing, vision and sense, i.e. the variation in the three aspects such as phonology, morphology and semantics. This paper focuses on the interpretation of markedness in language use following the three perspectives, i.e. pragmatic interpretation, psychological interpretation and cognitive interpretation, with an aim to define the function of markedness.     

Lower Paleozoic oil relationships within Williston Basin, Canada

The Williston Basin is a significant petroleum province, containing oil production zones that include the Middle Cambrian to Lower Ordovician, Upper Ordovician, Middle Devonian, Upper Devonian and Mississippian and within the Jurassic and Cretaceous. The oils of the Williston Basin exhibit a wide range of geochemical characteristics defined as "oil families", although the geochemical signature of the Cambrian Deadwood Formation and Lower Ordovician Winnipeg reservoired oils does not match any "oil family". Despite their close stratigraphic proximity, it is evident that the oils of the Lower Palaeozoic within the Williston Basin are distinct. This suggests the presence of a new "oil family" within the Williston Basin. Diagnostic geochemical signatures occur in the gasoline range chromatograms, within saturate fraction gas chromatograms and biomarker fingerprints. However, some of the established criteria and cross-plots that are currently used to segregate oils into distinct genetic families within the basin do not always meet with success, particularly when applied to the Lower Palaeozoic oils of the Deadwood and Winnipeg Formation.     

An Analysis of Catherine＇s Character——Wuthering Heights

Wuthering Heights, Emily Bronte＇s only novel, was published in December of 1847 under the pseudonym Ellis Bell. The book did not gain immediate success, but it is now thought one of the finest novels in the English language. Catherine is the key character of this masterpiece, because everybody and everything center on her though she had a short life. We can understand this masterpiece better if we know Catherine well.     

Characterization of Ordovician carbonate reservoirs, southeastern Saskatchewan, Canada

The discovery of the prolific Ordovician Red River reservoirs in 1995 in southeastern Saskatchewan was the catalyst for extensive exploration activity which resulted in the discovery of more than 15 new Red River pools. The best yields of Red River production to date have been from dolomite reservoirs. Understanding the processes of dolomitization is, therefore, crucial for the prediction of the connectivity, spatial distribution and heterogeneity of dolomite reservoirs.The Red River reservoirs in the Midale area consist of 3～4 thin dolomitized zones, with a total thickness of about 20 m, which occur at the top of the Yeoman Formation. Two types of replacement dolomite were recognized in the Red River reservoir: dolomitized burrow infills and dolomitized host matrix. The spatial distribution of dolomite suggests that burrowing organisms played an important role in facilitating the fluid flow in the backfilled sediments. This resulted in penecontemporaneous dolomitization of burrow infills by normal seawater. The dolomite in the host matrix is interpreted as having occurred at shallow burial by evaporitic seawater during precipitation of Lake Almar anhydrite that immediately overlies the Yeoman Formation. However, the low δ18O values of dolomited burrow infills (-5.9‰～ -7.8‰, PDB) and matrix dolomites (-6.6‰～ -8.1‰, avg. -7.4‰ PDB) compared to the estimated values for the late Ordovician marine dolomite could be attributed to modification and alteration of dolomite at higher temperatures during deeper burial, which could also be responsible for its 87Sr/86Sr ratios (0.7084～0.7088) that are higher than suggested for the late Ordovician seawaters (0.7078～0.7080). The trace amounts of saddle dolomite cement in the Red River carbonates are probably related to "cannibalization" of earlier replacement dolomite during the chemical compaction.     

Features of Women's language

Language is a means of verbal communication. People use language to communicate with each other. In the society, no two speakers are exactly alike in the way of speaking. Some differences are due to age, gender, statue and personality. Above all, gender is one of the obvious reasons. The writer of this paper tries to describe the features of women＇s language from these perspectives： pronunciation, intonation, diction, subjects, grammar and discourse. From the discussion of the features of women＇s language, more attention should be paid to language use in social context. What＇s more, the linguistic phenomena in a speaking community can be understood more thoroughly.     

Design and analysis of generic LBS application developing platform

Location based services is promising due to its novel working style and contents.A software platform is proposed to provide application programs of typical location based services and support new applications developing efficiently. The analysis shows that this scheme is easy implemented, low cost and adapt to all kinds of mobile nework system.     

橡胶颗粒沥青混合料低温抗裂性试验研究

以AC-13级配为基础,将橡胶颗粒代替部分集料掺入混合料中,以低温弯曲试验为评价方法对不同橡胶颗粒掺量下沥青混合料的低温抗裂性进行研究,并引入应变能密度值对混合料的低温抗裂性进行综合评价.试验结果表明:橡胶颗粒沥青混合料试件的破坏微应变均超过2 300,满足冬寒区的技术指标;无论是否掺加橡胶颗粒,随着温度的下降,沥青混合料破坏时的最大弯拉强度增大,弯拉应变降低,劲度模量增大;弯曲应变能密度在胶粒掺量为1%左右时具有较大的弯曲应变能密度值,此时橡胶颗粒沥青混合料具有较好的低温抗裂性.     

A computer generator for randomly layered structures

AcomputergeneratorforrandomlylayeredstructuresYUJia shun1,2,HEZhen hua2(1.TheInstituteofGeologicalandNuclearSciences,NewZealand;2.StateKeyLaboratoryofOilandGasReservoirGeologyandExploitation,ChengduUniversityofTechnology,China)Abstract:Analgorithmisintrod…     

低渗透非均质砂岩油藏启动压力梯度研究

理论推导与室内实验相结合,建立了低渗透非均质砂岩油藏启动压力梯度确定方法。首先借助油藏流场与电场相似的原理,推导了非均质砂岩油藏启动压力梯度计算公式。其次基于稳定流实验方法,建立了非均质砂岩油藏启动压力梯度测试方法。结果表明:低渗透非均质砂岩油藏的启动压力梯度确定遵循两个等效原则。平面非均质油藏的启动压力梯度等于各级渗透率段的启动压力梯度关于长度的加权平均;纵向非均质油藏的启动压力梯度等于各渗透率层的启动压力梯度关于渗透率与渗流面积乘积的加权平均。研究成果可用于有效指导低渗透非均质砂岩油藏的合理井距确定,促进该类油藏的高效开发。     

Quantitative trait loci （QTLs） for quality traits related to protein and starch in wheat

Quality traits in wheat （Triticum aestirum L.） were studied by quantitative trait locus （QTL） analysis in a recombinant inbred line （RIL） population, a set of 131 lines derived from Chuan 35050 × Shannong 483 cross （ChSh）. Grains from RILs were assayed for 21 quality traits related to protein and starch. A total of 35 putative QTLs for 19 traits with a single QTL explaining 7.99-40.52% of phenotypic variations were detected on 10 chromosomes, 1D, 2A, 2D, 3B, 3D, 5A, 6A, 6B, 6D, and 7B. The additive effects of 30 QTLs were positive, contributed by Chuan 35050, the remaining 5 QTLs were negative with the additive effect contributed by Shannong 483. For protein traits, 15 QTLs were obtained and most of them were located on chromosomes 1 D, 3B and 6D, while 20 QTLs for starch traits were detected and most of them were located on chromosomes 3D, 6B and 7B. Only 7 QTLs for protein and starch traits were co-located in three regions on chromosomes 1D, 2A and 2D. These protein and starch trait QTLs showed a distinct distribution pattern in certain regions and chromosomes. Twenty-two QTLs were clustered in 6 regions of 5 chromosomes. Two QTL clusters for protein traits were located on chromosomes 1D and 3B, respectively, three clusters for starch traits on chromosomes 3D, 6B and 7B, and one cluster including protein and starch traits on chromosome 1D.