我国食品冷链物流现状与发展趋势

本文调查了我国食品冷链物流的发展现状,分析了我国冷链物流存在的问题,总结出制约我国食品冷链物流行业发展的因素,在此基础上,预测了我国食品冷链物流行业的发展方向和未来发展趋势。     

我国鲜活农产品冷链物流与纳米蓄冷材料的应用

本文对我国鲜活农产品冷链物流的必要性和优越性、国内外冷藏运输设施及方式、我国蓄冷冷链物流存在的问题、纳米蓄冷材料研究和应用、纳米流体相变蓄冷的特点、蓄冷材料应用与鲜活农产品冷链物流过程中需冷品质保持的相互关系进行了综述。通过分析得出,纳米蓄冷材料是一种全新、环保、低碳节能的新型能源材料,具有优异的蓄/释冷特性和热物性特性,相变潜热大,过冷度低,释放冷量时间延长,应用到鲜活农产品采后的贮运物流过程中,具有巨大的应用价值,同时,纳米蓄冷材料配套蓄冷贮运技术可为我国鲜活农产品全程冷链物流的发展奠定良好基础。     

我国果蔬冷链物流建设现状及发展建议

我国是果蔬生产大国,果蔬具有易腐性,加之流通环节多、冷链设施不完备等诸多原因,导致果蔬的流通腐损率非常高。采用冷链物流可以有效地降低果蔬的流通腐损率、减少物流环节的消耗。目前,发达国家已经建立了完善的冷链物流体系,流通腐损率很低,但我国果蔬冷链物流体系建设比较滞后,冷链流通率远低于发达国家水平,发展果蔬冷链物流面临着严峻的考验。本文研究了果蔬冷链物流的发展现状,对各地区果蔬冷链物流现状进行了汇总,提出了果蔬冷链物流的发展对策和建议。     

RFID在生鲜食品冷链物流中的应用模式

RFID的发展应用给生鲜食品冷链物流操作提供了机会。本文简要分析我国生鲜食品冷链物流存在的问题,RFID技术在生鲜食品冷链物流中应用的优越性。基于此提出RFID在超市生鲜食品销售环节的应用设计模式。由于连锁经销体系的兴起,食品流通形态的变革,专业分工细化和低温食品的逐渐普及与成熟,使冷链物流急骤升温,成为人们关注的焦点。冷链物流泛指冷藏冷冻类食品在生产、贮藏运输、     

电商环境下食用菌冷链物流体系设计

为进一步推动食用菌冷链物流行业的发展,建立电商环境下的现代化物流体系。在讨论食用菌冷链物流体系设计原则的基础上,从第三方仓储公司的选择和冷链仓储管理的角度,对食用菌冷链物流体系的仓储子系统进行了设计。该设计方案可以有效提升食用菌冷链物流的仓储效率,促进了电商环境下食用菌冷链物流行业的良性发展。     

我国果蔬冷链物流发展对策的探讨

本文从国内外果蔬冷链物流现状出发,比较列举了国内外果蔬冷链物流的发展现状、政策法律环境、市场机制、技术设备以及相关协会作用等五个方面的差距,最终提出快速发展我国果蔬冷链物流业的应对策略。     

我国农产品冷链物流发展现状及对策

农产品不仅是人类的生存之本,也是我国社会经济发展的基础。由于农产品本身的生物特性是含水量高、保鲜期短,这使其在采后流通过程中极易腐烂,造成经济损失。农产品冷链物流的现代化和专业化,大大降低了农产品的损耗率。发展冷链物流是实现产后减损、提高农产品质量、促进农民增收最有效的途径,因此势在必行。本文分析了我国农产品冷链物流行业目前存在的问题,提出了可操作性的发展思路。     

大数据智能编码系统与食用菌冷链物流保鲜技术

针对传统的食用菌分类编码标准不统一、数据交叉的问题,利用大数据智能编码技术,采用分布式数据库HBase存储各个食用菌分类体系中的异构数据。统一了编码查询标准,提高了编码效率和查询速度;同时,针对食用菌冷链物流保鲜技术开展研究,通过对比3种食用菌的保鲜技术,比较了温度、呼吸强度、营养成份等对3种食用菌品质的影响,试验证明,食用菌低温冷链物流是一种有效的物流运输方法,可以有效延缓食用菌的变质衰老过程,增加保鲜时间。     

冷链物流与 智慧的邂逅

物流在国民经济发展中具有重要的意义,据前瞻产业研究院数据,2019年我国社会物流总额达到298.0万亿元,同比增长5.9％.随着人们对于食品个性化需求的提升,生鲜食品的线上交易与日俱增.对于生鲜食品如奶、蔬菜、水果、肉、海鲜等需要低温贮藏及运输,冷链物流则为其提供了最为适宜的温度和湿度环境,同时抑制细菌的活性、降低细菌...     

羊肚菌冷链物流系统安全性评价

针对羊肚菌冷链物流系统安全性评价问题,分析了冷链物流安全评价的内容,建立了羊肚菌冷链物流安全生产能力指标体系,并详细分析了指标体系中的20项评价指标。对提高冷链物流企业的安全生产能力和管理水平具有一定的借鉴意义。     

保鲜设施和保鲜链的应用效益分析

简要阐述了保鲜设施的种类和保鲜链的模式,衡量保鲜效果时可用鲜活度和营养值两个量化指标。将产品贮后的诸项理化指标与入库时比较,用通式计算获得量值,简洁明确地表达贮藏效果。影响保鲜贮藏经济效益的主要因素是保鲜设施水平、产品属性、保鲜技术和效果及经营管理水平。     

Effects of myosin light chain kinase on regulation of endothelial barrier function

Myosin light chain kinase (MLCK) activates the regulatory light chain of myosin II, and the phosphorylated myosin light chain leads to actomyosin contractile activity, as well as the cell contraction and increasing intercellular gap, which finally results in endothelial barrier dysfunction. MLCK-dependent hyperpermeability occurs in response to multiple cell signaling molecules and signaling pathways, including Ca²⁺, Src, PKC, NO, cGMP and mitogen activated protein kinases (MAPK). In this review, different mechanisms of endothelial hyperpermeability mediated by MLCK are discussed.     

The feature of TCR-zeta chain expression in patients with CML by real-time quantitative PCR

AIM: To establish a real-time PCR technique for detection and quantification of TCR ζ chain expression and to investigate TCR ζ chain expression level in patients with chronic myeloid leukemia (CML). METHODS: Real-time PCR with SYBR GreenⅠ technology was used for detecting TCR ζ chain expression level in peripheral blood mononuclear cells from 30 patients with CML and 30 normal individuals. β2 -microglobulin gene (β2M) was used as an endogenous reference. Relative changes in TCR ζ chain expression level were used by the 2- △△Ct method between patients with CML and normal individuals. RESULTS: The SYBR GreenⅠ real-time technique for quantitative detection of TCR ζ chain expression levels was established successfully. The expression level of TCR ζ chain in 18 patients with CML was reduced. However, the TCR ζ chain expressed increased in 12 patients with CML. CONCLUSION: The TCR ζ chain expression level is divided into down expression (60%) and over expression (40%) groups, and the down expression of TCR ζ chain might related to cellular immunodeficiency in most of CML patients.     

Hypoxia and hypoxia-combined exercise alter the myosin heavy chain isoform composition in rat soleus

AIM: To determine the effects of chronic hypobaric hypoxia and combined with exercise on myosin heavy chain (MHC) profile in rat soleus.METHODS: Wistar rats were divided into 4 groups: control (C),hypoxic group (H),exercising group (E) and hypoxia-combined with exercise group (HE).Rats in H and HE groups were subjected to simulated 5 000 m hypobaric hypoxia for 5 weeks (24 h/d,7 d/week),except that animals of both groups were descended to 4 000 m for 1 h/day (6 d/week) from the second week to the end,during which the HE group was forced to swim ceaselessly.Twenty-four hours after the last bout of exercise training,animals were sacrificed at 4 000 m (H and HE groups) or at sea level (C and E groups),soleus was collected and MHC was determined with sodium dodecyl-polyacrylamide gel electrophoresis followed by densitometry analysis.RESULTS: The composition of myosin heavy chain in rat soleus was type I (78%) and typeⅡa (22%) in C.The percentage of myosin containing the type I isoform in rat soleus was significantly higher in H,E and HE groups than that in the control.CONCLUSION: The switch of MHC isoforms in soleus from typeⅡa to type I is advantageous in improving efficiency of energy utilization.These changes may reflect the trend of increasing capacity duration and energy utilization efficiency of rat soleus after hypoxia and hypoxia-combined exercise training.     

Integrity in the fresh produce supply chain: solutions and approaches to an emerging issue

Long supply and complex fresh produce supply chains provide opportunity for fraudulent activity to occur especially further processing or re-packing of products to mask opaque practice and non-compliant behaviour. Price premiums for products designated as ‘high-value’, for example, organic produce, produce of particular provenance, or geographical production area provides motivation for less scrupulous actors to present for sale, produce that is mislabelled or misrepresented. People integrity as well as data, product and process integrity are gaining wider attention in the horticultural sector. Types of fraud critiqued in this review paper include mislabelling, substitution or misrepresentation of origin (country or regional location), method of production (organic or conventional) or incorrect varietal declaration. These challenges and the existing and emerging technologies that are both used within a quality assurance programme and alternatively used by regulators when investigating potential instances of fraudulent behaviour are considered. New methodological solutions and approaches are emerging and such techniques will develop rapidly to meet the growing challenge of fraud and to ensure consumer trust in the industry is maintained especially as types of food fraud evolve and become more sophisticated.     

Anti-cardiac myosin heavy chain antibodies isolated from patients with acute myocardial infarction induce rat cardiomyocyte apoptosis

AIM: To study the effect of human anti-cardiac myosin heavy chain antibodies (AMHCA) on rat cardiomyocyte apoptosis. METHODS: Rat cardiomyocytes were isolated by the method of enzymolysis. Apoptosis of the cardiomyocytes was observed and measured by DNA end labelling and Annexin-V/PI double-staining assay. The proteins levels of apoptosis related P53 and Bcl-2 and the second messenger calcium were measured by Western blotting, patch clamp and confocal calcium imaging, respectively. RESULTS: AMHCA was able to induce cardiomyocyte apoptosis in a dose dependent manner. In the presence of AMHCA, apoptosis-accelerating nucleoprotein P53 promoted myocardial apoptosis, while apoptosis-inhibiting cytoplasmic protein Bcl-2 inhibited myocardial apoptosis. Meanwhile, the concentration of cytoplasmic calcium was elevated. No effect of AMHCA on L-type calcium currents was observed. CONCLUSION: As a novel triggering factor, AMHCA isolated from the patients with AMI induces cardiomyocyte apoptosis.