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“福建海水的温度和盐度都很适宜海参快速生长,而现在福建的海参销路已经打开,山东人在那边包参圈的快占了一半了。”一位海参养殖户这样说。然而更令烟台的养殖户们担心的,是南方海参冒充北方海参,并大量渗入北方市场,造成了良莠不齐的景象。 相似文献
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王龙 《内蒙古科技与经济》2019,(10)
通过对大连海参养殖业发展现状及海参销售现状的介绍与经验总结,形成大连海参养殖业发展新思考,提出调整传统养殖模式、完善养殖基础设施、打造地方经济特色的海参品牌、建立多元化的销售网络、提高海参养殖生产链人员素质等海参养殖业绿色发展理念,利用互联网有针对性地重塑大连海参养殖业的发展。 相似文献
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海参多糖是一种结构特殊,为海参所特有的物质。海参多糖具有增强细胞的免疫作用并能有效的抑制肿瘤细胞的活性、加速肿瘤细胞衰亡的作用,还具有降低血粘度、抗病毒抗真菌、保护神经细胞等生物活性。无论是在食品领域还是在药品领域都具有重要的研究意义。 相似文献
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如何提升中国战略性新兴产业高价值专利产出量,成为有效应对国际知识产权贸易战、实现科技自立自强的重要问题。基于竞争优势整合论和权变理论,探索了企业专利能力与专利战略的匹配对专利价值的影响机理;运用独立样本T检验和多元层次回归分析进行实证检验。研究发现：单维度专利能力与不同专利战略的匹配对专利价值有差异性影响,其中：专利创造能力对三类专利战略企业的专利价值均有显著影响,专利保护能力对市场扩张型与资产转化型企业的专利价值有显著影响,专利运用能力对资产转化型和技术自控型企业的专利价值有显著影响。多维度专利能力与不同专利战略的匹配对专利价值有差异性影响,其中：市场扩张型专利战略匹配专利创造能力和专利保护能力,资产转化型专利战略匹配专利创造能力、专利保护能力和专利运用能力,技术自主型专利战略匹配专利创造能力和专利运用能力。基于实证结果,针对实施不同专利战略的企业提供专利能力提升差异化策略的管理启示。 相似文献
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专利质量及其测度方法与测度指标体系研究 总被引：2，自引：0，他引：2
从单项专利和机构专利两个方面研究了专利质量的内涵外延,提出了单项专利和机构专利质量测度的方法和指标体系。认为专利质量是专利技术水平高,撰写较好,能够经得起审查、无效和诉讼程序具有较大市场价值的专利,本质是专利满足专利三性即新颖性、创造性和实用性的程度。对单项技术来说,专利质量必须同时满足技术质量和法定质量,两者缺一不可。对机构来说,除测度技术质量和法定质量外,还要测度专利实际产生的价值,专利质量是指专利技术质量、法定质量和经济质量的总和。 相似文献
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刺参（Apostichopus jiaponi CUS Selenka）养殖业现已成为我国海水养殖业中的支柱产业,发展潜力巨大。文章就我国海参养殖业的发展与技术进步、当前存在的主要问题及未来展望加以论述,以促进海参养殖业的健康持续发展。 相似文献
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BackgroundSea cucumber is a seafood of high nutritional value. During its processing, sea cucumber processing liquor is routinely produced, which is usually discarded as waste. The chemical composition of this processing liquor is similar to sea cucumbers themselves. Hence, valuable ingredients, such as functional polysaccharides, could be obtained from them.ResultsBiologically active polysaccharides from sea cucumber processing liquor were extracted through protease hydrolysis and electroosmosis. The analysis revealed that the polysaccharide extract from sea cucumber processing liquor (PESCPL) is predominantly composed of mannose, in addition to some glucose and fucose. The antioxidant activity of PESCPL was analyzed using in vitro. It was demonstrated that PESCPL could effectively scavenge 1,1-diphenyl-2-picrylhydrazyl radicals, hydroxyl radicals, and superoxide anion radicals. The effect of PESCPL was investigated in vivo by using mice model fed with high-fat diets with/without PESCPL supplement. It was shown that PESCPL could increase the catalase and superoxide dismutase activity in the serum and decrease serum malonaldehyde content. Furthermore, mice fed with PESCPL diet showed a considerable decrease in the serum cholesterol and triglyceride levels and an increase in high-density lipoprotein cholesterol levels.ConclusionsOur research highlights that PESCPL is a natural antioxidant and could be utilized as a therapeutic supplement for dyslipidemia. 相似文献
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《Electronic Journal of Biotechnology》2014,17(6):280-286
BackgroundThe sea cucumber lysozyme belongs to the family of invertebrate lysozymes and is thought to be a key defense factor in protecting aquaculture animals against bacterial infection. Recently, evidence was found that the sea cucumber lysozyme exerts broad spectrum antimicrobial action in vitro against Gram-negative and Gram-positive bacteria, and it also has more potent antimicrobial activity independent of its enzymatic activity. To explore the antimicrobial role of this non-enzymatic lysozyme and model its structure to novel antimicrobial peptides, the peptide from the C-terminal amino acid residues 70–146 of the sea cucumber lysozyme in Stichopus japonicus (SjLys-C) was heterologously expressed in Escherichia coli Rosetta(DE3)pLysS.ResultsThe fusion protein system led to over-expression of the soluble and highly stable product, an approximate 26 kDa recombinant SjLys-C protein (rSjLys-C). The present study showed that rSjLys-C displayed strong antimicrobial activity against the tested Gram-positive and Gram-negative bacteria. In particular, the heat-treated rSjLys-C exhibited more inhibitive activity than the native rSjLys-C. The structural analysis of SjLys-C showed that it is a typical hydrophilic peptide and contains a helix-loop-helix motif. The modeling of SjLys-C molecular structures at different temperatures revealed that the tertiary structure of SjLys-C at 100°C underwent a conformational change which is favorable for enhancing antimicrobial activity.ConclusionThese results indicate that the expressed rSjLys-C is a highly soluble product and has a strong antimicrobial activity. Therefore, gaining a large quantity of biologically active rSjLys-C will be used for further biochemical and structural studies and provide a potential use in aquaculture and medicine. 相似文献
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海域使用投资往往具有较强的不确定性、不可逆性和可延迟性特点,使得海域使用权具有期权时间价值;但中国当前基于贴现现金流的海域使用权定价方法,没有考虑这些特点及其产生的期权时间价值,导致使用权定价偏低。为此,文章将实物期权法应用于海域使用权定价,以期确定更加合理的海域使用权价格,实现海洋经济可持续发展。以2013年青岛市黄岛区琅琊镇围堰养殖海参项目海域使用权价格为例,实物期权法的定价为95.89万元/hm2,相同条件下,贴现现金流法的定价为87.94万元/hm2,贴现现金流法的定价低7.95万元/hm2。而且,由于没有达到实物期权法确定的投资临界值,2013年并不适合投资;此时若投资,海域使用权价格将比达到投资临界值时低99.60万元/hm2,会极大降低海域资源利用效率。此外,参数敏感性分析表明,实物期权法下,海域使用权价格对市场环境变化很敏感,而贴现现金流法不能体现市场环境变化的影响。研究成果可为制定我国海域使用权定价政策提供参考和借鉴。 相似文献
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利用人工鱼礁工程增殖海洋水产资源的研究 总被引：35，自引：0，他引：35
该文分析了人工鱼礁用于海洋牧场建设的可行性和人工鱼礁集鱼的机理，并介绍了人工鱼礁的种类、结构形式、平面布置以及制作人工鱼礁投放场地的若干问题进行了深入的探讨。 相似文献
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大规模海上风电场建设的技术支撑体系研究 总被引：1，自引：0，他引：1
海上风力发电是今后保障能源消费安全、保持经济增长和保护环境等方面的一个强有力的手段.随着风电技术的进步,以及海上资源丰富、风速相对稳定、开发利益相关方较少、不与其他发展项目争地、可以大规模开发等优势,大规模海上风电场建设已成为风电产业发展的新趋势.但是,海上风电场施工困难、对风电机组质量和可靠性要求较高、对抗击海上台风等灾害性天气要求苛刻,因此要健康、快速、有序地发展海上风电,除了要对海上复杂的风资源和环境条件进行深入研究分析外,强有力的技术支撑更是不可或缺的.大规模海上风电场建设的特征是现有众多技术的集成,其中既包含海上建设项目的共有技术,如海上平台、海上桩基、海上桥梁等成熟技术;又包含海上风电场建设的专有技术,如海上风电场的施工、安装、运输、维护等配套实施的投入和建设等技术难点.本文首先分析大规模海上风电场建设的技术支撑体系内涵和总体框架,然后重点从海上大功率专用风力机、海上风电场施工安装、海上风电登陆传输、海上风电场抗台风等自然灾害以及海上风电大规模应用等方面,深入阐述大规模海上风电场建设的技术支撑体系,可为大规模建设海上风电场提供科学的依据和指导. 相似文献
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以纯菌种发酵制备黄瓜泡菜.以植物乳杆菌B4、弯曲乳杆菌A8为发酵菌种制备黄瓜泡菜.研究了了黄瓜发酵过程中的pH、活菌数、亚硝酸盐等的变化.结果表明人工接种发酵的黄瓜泡菜与自然发酵的黄瓜泡菜相比,在第5天时有较低的pH、较高的活菌数,较低的亚硝酸盐含量. 相似文献
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《Journal of The Franklin Institute》2023,360(12):8339-8362
This paper addresses the problem of controlling a wave energy converter (WEC) susceptible to faults in its braking subsystems, characterized through nonlinear damping. By considering the necessity of robust trajectory tracking related to the sea waves for maximizing the converted energy, one aims to preserve such a trajectory in the presence of faults to avoid physical damage in the structure of the WEC. To achieve this objective, this paper proposes a fault-tolerant control (FTC) that combines two systems: (i) a novel nonlinear servocompensator (NSC) and (ii) a fault diagnosis subsystem (FD). The NSC is based on a variable structure control that generalizes the internal model principle for robust tracking. The reference signal is computed from real-time measurements of the irregular sea waves. The FD subsystem estimates the faults related to the wear of the brakes via an unknown input observer. Due to its independent performance from the FD, the global scheme can be considered as a passive FTC. By considering the faulty model of a WEC based on the Archimedes wave swing prototype, theoretical formulation and the convergence proof are given for the NSC and the FD. The performance of the proposed design is verified with numerical simulations of the WEC with the incidence of irregular sea waves under different fault scenarios in the upper and lower brakes. 相似文献
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密度是海冰资源的一个重要物理参数,它受许多因素的影响,有着较大的变动范围。本文以渤海沿岸连续两个年份的平整冰和堆积冰为研究对象,将海冰密度分为实密度和表观密度两种类型,并给出了相应的定义、实验和计算方法;通过一系列的实验和数据分析,得出渤海湾和辽东湾沿岸的海冰在密度分布方面具有一定的规律性。研究结果表明平整冰密度介于0.633-0.918g/cm3之间,堆积冰的密度变化范围为0.615-0.906g/cm3。在同一地点,不同年份的海冰密度大小存在差异,但是平整冰的实密度和表观密度均高于堆积冰。利用两种密度值计算得出的海冰空气孔隙率对于了解海冰性质的空间分布规律以及指导渤海海冰资源的开发利用具有积极的意义。 相似文献