水解真空干燥法处理禽畜废弃物

提出了一种畜禽废弃物的处理方法——水解真空干燥法。水解真空干燥法是采用高温、高压进行消毒灭菌，通过抽真空来充分干燥物料的一种处理废弃物方法，对禽畜废弃物的病菌、病毒灭活较为彻底，处理过程安全可靠，能做到无害化处理；同时还可以最大程度保留废弃物中营养成分，可作为饲料添加剂。     

鱼香肉丝真空冷却工艺研究

采用真空冷却工艺,对中餐鱼香肉丝的冷却速度、质量损失、感官、质构、色泽以及微生物指标进行了研究。试验结果表明产品温度从70℃冷却到10℃,真空冷却比自然冷却速度快36倍,且在感官评定、质构分析和色泽上可以达到相同的效果。同时真空冷却又有效地减少了微生物污染。     

羊肚菌冷冻干燥加工技术研究

通过实验,研究确定了了冻干羊肚菌的共晶点和共融点,得到了最佳冻干曲线,通过对冻干羊肚菌和传统风干羊肚菌的理化指标及感官指标的比较,证实了冷冻干燥羊肚菌的加工工艺的优越性。     

真空脱水技术使水泥混凝土路面更具推广价值

本文分析了水泥砼路面与沥青路面的优缺点 ,解释了为什么说砼真空脱水技术使水泥砼路面更具推广价值     

房屋建筑材（木窗）防腐处理应用性试验（初报）：药剂和处理方法

建筑材(木窗)防腐处理应用性试验表明:防腐剂PPA,CCB和CCA_(S)可用于门窗材的防腐处理。PPA宜采用双真空法;CCA_(S)、CCB宜采用加压法。其吸药量宜控制在窗框6kg/m~3,扇窗4kg/m~3。处理前应先机械加工,按窗框和窗扇分类进行防腐处理。对于难处理树种木材应考虑密封堆集扩散作业,使用水溶性防腐剂(CCA_(S)、CCB)时需采取木材防变形措施。     

Analysis of factors affecting milking claw vacuum levels using a simulated milking device

Bovine mastitis is typically caused by microbial infection of the udder, but the factors responsible for this condition are varied. One potential cause is the milking system, and although previous studies have investigated various methods for inspecting these devices, most have not assessed methods for evaluating the milking units. With this in mind, we analyzed the factors that affect the vacuum inside the milking claw by using a simulated milking device and by measuring milking claw vacuum when adjusting the flow rate in five stages. The factors analyzed in each milking system were the vacuum pressure settings (high and low line system) , milk tube length (200‐328 cm), aperture diameter (14‐22.2 mm), constricted aperture diameter (12 mm), tubing configurations, lift formation (0‐80 cm), claw type (bottom and top flow) and use or non‐use of a milk sampler. The study findings demonstrated that all of these variables had a significant impact on claw vacuum and suggest that a diagnostic method using a simulated milking device should be considered when inspecting modern milking systems.     

Temperature Simulation of Berry Slices Under Microwave Vacuum Puffing Conditions

In order to study the temperature simulation of berry slices in microwave vacuum puffing process, numerical simulation method was used to simulate the temperature in different time according to theoret...     

Determining fertilizer phosphorus requirement of upland rice

Abstract

Assessing the fertilizer phosphorus requirement (FPR) of crops is an important component of research for efficient and rational use of fertilizers. Soil and plant tests are used to determine the FPR of crops. Two methods were evaluated for determining the FPR of upland rice grown on an Ultisol in the humid forest zone of Cote d'Ivoire. The first method used a simple model based on P uptake using the equation: FPR=(Up‐U0)/PRF, where Up is P uptake at a given yield, Uo is P uptake from unfertilized soil, and PRF is the P recovery fraction of applied P. The parameters, U0, Up, and FPR were determined in field experiments for the rice cultivars grown on an Ultisol under rainfed upland conditions. The second method was based on the P applied, P uptake, and grain yield relationships for upland rice. First, P uptake at a given rice yield was determined from the relationship between total P uptake and grain yield. The amount of fertilizer P applied for the given P uptake and grain yield was then, determined from the relationship between P applied and P uptake. There was a good agreement between the observed values of FPR and the predicted values of FPR determined by the two methods. The results suggest that the simple model based on P uptake can be utilized for determining the fertilizer P requirements of crops.     

真空降水预压及水泥搅拌桩在桥坡加固中的应用

为有效治理桥头跳车现象,减小桥坡工后沉降,针对填土速率、桥台侧向位移、总沉降及分层沉降等技术参数,提出了相应的技术措施,重点对真空降水预压和水泥搅拌桩进行比较分析.分析结果认为,对软土层较薄、填土高度较低的路段,可只做浅层处理,采取换土法、石灰短桩法,辅以砂垫层、复合土工布等减小不均匀沉降;对于深层处理方法,在桥坡填土较高、填土速率较快的条件下,真空降水预压法较经济但侧向位移相对较大,水泥搅拌桩加固法侧向挤压力较小但费用较大,结合工程实践对上述问题进行了改进和探索.     

喷蒸真空热压水溶性酚醛胶杨木大片刨花板

我国防水人造板生产目前普遍采用酚醛树脂胶（PF），热压周期长，生产效率低。笔者采用南京林业大学饱和蒸汽喷蒸试验压机，压制水溶性PF胶杨木大片刨花板。结果表明，采用喷蒸真空热压（SIVP）技术，热压时间可缩短到传统热压的35％左右；板的吸水厚度膨胀率（TS）缩小33％；在相同施胶量下，板的内结合强度（IB）提高的15％，同时甲醛释放量降低约24％；但板的抗弯性能有较大幅度的下降；此外，板材芯层最低密度值比传统热压的板增高，断面密度分布趋于均匀。