新疆金沟河排沙工程涡管排沙技术的应用

根据金沟河涡管排沙工程的布置形式及排沙要求,提出了排沙涡管开口宽度、涡管直径、涡管与渠道轴线夹角、涡管开口长度、涡管纵向坡度等技术指标的确定方法,计算并分析了排沙涡管截沙率及排沙效果。结果表明:通过对排沙涡管进行改进,金沟河排沙平均耗水量占引进水量的4.51%,符合原设计的技术指标。     

Effect of high pressure preservation on the quality of dry cured beef “Cecina de Leon”

Microbiological, physicochemical and sensory quality of “Cecina de León” vacuum packed was evaluated after high pressure treatment (500 MPa, 5 min) and further chilling storage at 6 °C for up to 210 days. The objective was to determine if high pressure processing is a valid preservation method to reduce the growth of spoliage microorganisms without modification of its quality properties along of the chilling storage time for this Spanish beef dried meat product. Since, this product is usually presented to the consumer in vacuum packed slices and cuts, these two retail sale systems were studied. High pressure processing at 500 MPa for 5 min avoided the growth of enterobacteria, enterococci and pseudomonads and delayed the growth of lactic acid bacteria, Micrococcaceae and yeasts and moulds. Besides, no change was found after pressure treatment and during refrigerated storage, in physicochemical and sensory parameters. It could be concluded, on the basis of the results, that the high pressure treatment was an efficient method for preserving the safety of “Cecina de León” without decreasing their sensory properties.Industrial relevanceHigh pressure processing is finding increasing use in the food industry because of its relative advantages versus other food processing methods in eliciting minimal changes in the flavour and nutritional qualities of the final product and in extending the shelf life. The study aimed the evaluation of microbiological, physicochemical and sensory characteristics at vacuum packed slices and cuts of “Cecina de León” during subsequent extended chilled storage. High pressure processing was a valid preservation method to reduce the growth of spoilage microorganisms without any changes on “Cecina de León” quality properties along wide chilled storage.     

温度响应地下自生成支撑剂研究

为了在超深储层中构建全缝长、全缝网的有效支撑,研制了一种由相变液体和非相变液体组成的温度响应地下自生成支撑剂（液体支撑剂）。该支撑剂在地面低温条件下呈液态,在储层高温条件下发生相变,经过一定时间可转变为固体颗粒,从而支撑裂缝,并在高温和高闭合压力下始终保持较高的裂缝导流能力。室内性能试验表明,该支撑剂在不同搅拌速度下可以形成不同粒径的固体颗粒;相变前的液体支撑剂是一种黏性流体,滤失量低、配伍性良好;相变后形成的地下自生成支撑剂具有较好的承压能力,且粒径大小可控、相变时间可调,60 MPa闭合压力下不同粒径组合的有效导流能力可达9.21 D·cm。温度响应地下自生成支撑剂的研制,为超深储层的油气高效开发提供了一种新的改造方式。      

新疆中小流域治理的初步探讨

针对新疆中小流域的管理机构依法行政的职能范围十分有限、水资源无序开发、流域内水量分配不合理、水环境不断恶化等问题,从理顺水资源管理机制,促进水管体制改革;加大政府对流域水资源的宏观调控能力;提高流域机构依法行政能力等3个方面对新疆中小流域的治理进行了初步分析.认为只有加强流域水资源统一管理,发挥流域机构的行政管理职能,才能使水资源利用走上合理开发、科学利用的可持发展道路.     

膜下渗灌技术在新疆干旱灌区的应用效益分析

通过膜下渗灌技术在新疆干旱灌区的应用,分析了膜下渗灌技术在新疆干旱灌区特点与优势,发现该技术具有：节约成本、增产、维护工作量小、节水等优势;与“小白龙”常压膜下滴灌、加压滴灌和常规小畦沟灌相比,每公顷增收分别为5373、4222．05、7776元;项目投资回收期为2．1年,经济效益显著,可在干旱灌区进行大面积推广应用。     

膜下渗灌技术在新疆金沟河流域的应用

农业节水是实现新疆水资源可持续利用的必由之路。分析了膜下渗灌技术在棉花生产的应用情况,详细讨论了新疆金沟河灌区膜下渗灌技术的特点及优势,并进一步分析了种植成本与灌溉效益。结果表明：膜下渗灌比“小白龙”常压膜下滴灌、加压滴灌和常规小畦沟灌每公顷分别增收6079．5元、4964．5元、8330．4元。项目投资回收期为2．1年。以上指标较常规灌溉具有显著优势,可在干旱灌区进行大面积推广应用。