新型食品加工技术提升预制菜肴质量与安全

我国预制菜肴历史悠久,种类多样,满足了现代消费者对食品味道、营养、便捷性的需求,近年来发展迅速。从预制菜肴生产加工出发,明确了其内涵和外延,梳理了我国预制菜肴现阶段面临的原料、质量、安全、标准等方面存在的主要问题,并归纳了相关新型食品加工技术的应用趋势。新型预调理与烹饪技术可以实现菜肴色泽、质构、香气、滋味和营养成分的有效提升;新型杀菌技术依靠较低的处理强度,在保障安全性和保持品质之间达到平衡;快速冷却与冷冻技术在提高生产效率的同时对品质的影响最小;智能包装技术、物流智能控制技术的应用实现了预制菜肴流通中的品质稳定。研究总结和展望了提升预制菜肴质量与安全的加工新技术,以期为未来的研究指明方向,为预制菜肴产业的进一步健康发展提供参考。     

绿色食品的发展现状及前景

今天,由于现代工业和现代农业发展带来的环境污染、食品污染日益成为人们关注的焦点,随着经济的发展,人类消费观念和消费行为正在发生深刻的变化。在食品领域,人们得到基本食物热量需求满足后正在追求安全、富营养、高质量食品消费,为了达到这一目标,世界各国都在积极改善现代农业生产体系和现代食品加工技术的方法以协调环境——资源——食品——健康之间的关系。     

四自由度高速并联机器人的研究

综合新型四自由度并联机构的实际约束条件,建立了新型机构的运动学分析模型,求取了机构位置反解的显式解,建立了位置正解的Newton-Raphson数值迭代算法,优化了机构的尺度参数.针对我国食品生产与包装的实际需求,基于新型并联机构和机器视觉等先进技术,构建了面向食品生产与包装的自动高速并联机器人分拣系统.     

微藻及其在未来食品中的应用

微藻富含各类营养活性物质，是迄今为止所发现的含有营养素最丰富的食物之一.将微藻作为食品新资源不仅可以提供健康效益，还将有助于改善与可持续性相关的问题.从营养成分、生物活性、潜在营养价值等方面阐述微藻可作为食品新资源的应用与研究现状，综述其在谷物、果蔬、乳制品等食品中应用的发展潜力与趋势，为微藻未来食品的开发提供参考.     

食品生产现代化与食品安全问题刍议

食品生产的现代化满足了百姓对食品的巨大需求,同时现代科学技术在食品生产中的应用提高了消费者对食品安全的信任度,但是近来一系列的食品安全事件使消费者对采用了新技术、新方法的现代化食品生产的安全性提出了质疑.食物是人类赖以生存和发展的基本物质条件,因此食品及其安全性问题必须得到妥善解决.以牛肉食品的生产为例,本文通过深入探究现代化食品生产中原料生产、产品加工、销售的整个过程,寻找各环节中导致食品安全的症结所在.针对查找出的食品安全问题,在消费者力所能及的范围内提出相应的建议性措施,联合消费者的力量以迫使食品企业从消费者的健康考虑生产真正健康安全的食品.     

中国生物技术产业之舟何时启航

随着21世纪科学技术的发展,生物技术目前已广泛应用于农业、食品、医药等领域,开创了人类工农业生产发展的新途径。生物技术产业在未来的市场中将成为非常具有活力的生长点,在解决人类食物、健康、资源、环境等问题方面将发挥越来越大的作用,这已是全球范围内有识之士公认的事实!中国能否抓住这一推动21世纪经济发展和社会进步的重要机遇呢?     

应急食品研究现状与发展策略展望

应急食品是指在突发事件发生时用以补充营养和热量，维持人体生存的一类食品，其营养安全、加工包装、储运分发等特性与常规食品相比存在明显区别。介绍了应急食品的产品开发、储运、加工和包装技术研发现状，总结了目前国内外应急食品典型特征、发展趋势以及存在的问题，展望了未来应急食品研发策略、加工策略及安全检测方法，旨在为推动应急食品的科技创新和产业发展提供有力支撑。     

环罗源区域土地资源生态承载力评价初探

探讨环罗源湾区域人口、食物和土地资源之间的关系，分析人口消费与食物生产、人口需求与资源供给之间的平衡发展问题，为制定区域可持续发展战略提供科学依据。     

食品生物技术的发展历史及研究方向

食品生物技术最早可追溯到几千年前,当时人类已懂得用天然发酵方法制造面包,奶酪和酒。第二阶段的食品生物技术始于约100年前。着重论述了食品生物技术的发展历史及研究现状,食品生物技术特别是DNA重组技术,细胞融合技术等,新技术在改造食品资源,改进食品的加工和贮藏,新材料的合成及新食品的开发,食品分析及微生物检测等方面的应用。同时概述了在发展和利用食品生物技术时应注意的问题,并展望了食品生物技术的发展前景。而食品安全问题是关系到人体健康和国计民生的重大问题。     

如何选购速冻食品

正速冻食品主要分为未经加工直接进行速冻处理和经过制作加工之后再进行速冻处理两类,那么,食用经过如此处理的食品是否安全、健康?随着经济的发展与生活水平的提高,人们对食品种类的需求逐日增加,除了购买价格不菲的跨地域新鲜食物,价格合理的速冻食品也是消费者不错的选择。当下超市中销售的速冻食品主要分为两类。一类是经过制作加工之后再进行速冻处理的食品,例如各种品牌的速冻饺子、鱼丸、披萨等;另一类是未经加工直接进行速冻处理的食品,例如速冻海鲜、蔬菜、水果等。那么,经过如此速冻处理的食品是否安全、健康呢?     

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.     

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.     

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。     

A computer generator for randomly layered structures

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

On Tragic Consciousness In The Works By Ernest Hemingway

As an American modern novelist who were famous in the literary world, Hemingway was not a person who always followed the trend but a sharp observer. At the same time, he was a tragedy maestro, he paid great attention on existence, fate and end-result. The dramatis personae's tragedy of his works was an extreme limit by all means tragedy on the meaning of fearless challenge that failed. The beauty of tragedy was not produced on the destruction of life, but now this kind of value was in the impact activity. They performed for the reader about the tragedy on challenging for the limit and the death.     

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.