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Rapid determination methods for BOD are reviewed, high temperature method、corelation coefficient method and biosensor method included.
综述BOD快速测定方法,快速测定方法包括高温法、相关系数法和生物传感器法。
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Machinable bioactive glass-ceramics containing mica and fluorapatite were prepared by high-temperature melting. The glass-ceramics were analyzed by means of X-ray diffractometry, scanning electron microscopy with energy dispersive spectrometer and Fourier transform infrared reflection spectrometry. The bending strength, hardness and fracture toughness of the materials were measured.
摘 要:采用高温熔铸法制备可加工生物活性云母/氟磷灰石玻璃陶瓷;用X射线衍射、扫描电镜和傅里叶变换红外光谱分析等手段对材料的相组成和微观形貌进行研究,测定材料的抗弯强度、硬度和断裂韧性等力学性能;采用体外模拟体液浸泡法测试材料的生物活性。
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Machinable bioactive glass-ceramics containing mica and fluorapatite were prepared byhigh-temperature melting. The glass-ceramics were analyzed by means of X-ray diffractometry, scanning electron microscopy with energy dispersive spectrometer and Fourier transform infrared reflection spectrometry. The bending strength, hardness and fracture toughness of the materials were measured.
摘 要:采用高温熔铸法制备可加工生物活性云母/氟磷灰石玻璃陶瓷;用X射线衍射、扫描电镜和傅里叶变换红外光谱分析等手段对材料的相组成和微观形貌进行研究,测定材料的抗弯强度、硬度和断裂韧性等力学性能;采用体外模拟体液浸泡法测试材料的生物活性。
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S. bumalda from the Xiaochang County in Hubei Province was sunned to 90% dryness and dried to constant weight in the oven at 105 ℃, then grinded and its protein content was detected by micro-kjeldahl method, the soluble sugar content was detected by anthrone colorimetry, the crude fat content was detected by soxhlet extraction method, total ash content was detected by the method of burning with high temperature.
方法]将晒至9成干的湖北孝昌县珍珠花于105℃的烘箱中干燥至恒重,然后粉碎,凯氏定氮法测定其蛋白质含量,蒽酮比色法测定其可溶性糖含量,索氏抽提取法测定其粗脂肪含量,高温灼烧法测定其总灰分含量。
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The metallograph, x-ray diffraction, TEM, EMPA and XPS technigues were used to research the microstructure, phase structure, microhardness, composition, Valence of composed elements, internal stress of coatings, and to measure the wear-resistance and resistance to high-temperature oxidation, too.
文中应用金相分析、X-射线衍射法、透射电镜、电子探针显微分析法和X-射线光电子谱法等手段研究了N膜的显微组织、相结构、显微硬度、膜层成分、组成元素的价态和膜层内应力等性能;还测定了铝合金表面的N膜的耐磨性和抗高温氧化性能。
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Soil organic matter, total nitrogen, available nitrogen and pH are measured with high temperature potassium dichromate oxidation-capacity, semiminim karl method, alkaline hydrolysis pervasion method, and the potentionmeter method respectively.
用五点混合取样法采集广西桂林毛村岩溶区和非岩溶区典型林地、灌草丛地和耕地的0~20cm,20~40cm土壤样品,以高温外热重铬酸钾氧化-容量法测定有机质含量,半微量凯氏法测定全氮含量,碱解扩散法测定有效氮含量,电位法测定pH值。
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The glass and crystalline glass-solders of Li2O-ZnO-SiO2 system were prepared by conventional melt technology. The various factors effecting on glass ceramics and glass were investigated,which include glass chemical composition and heat-treatment and so on. And then by means of XRD, DTA, IR and SEM, the structure and properties of the glass and glass-ceramic were studied. The coefficient of linear expansion , transform temperature and soft temperature wer measured. And then the factors that effect the mechanical strength of glass-ceramic were discussed and the fluxion property was determined and the crystallization course and mechanism were discussed, which can provide certain therial reference value for practice producing and glass seals to glass, ceramics and metal.
用高温熔融法制备了Li_2O-ZnO-SiO_2系统玻璃及其结晶型玻璃焊料,探讨了各种因素(包括玻璃组成、热处理制度等)对微晶玻璃的结构和性能的影响;利用X射线衍射分析、DTA、红外光谱分析以及扫描电镜等现代测试手段,对玻璃的结构与性能进行研究,测定了玻璃及微晶玻璃的线膨胀系数、转变温度和软化温度,同时对影响微晶玻璃的强度的因素进行了探讨,并对该体系玻璃的流散性进行了测定,对它的析晶过程和析晶机理进行探讨,为实际生产和与玻璃、陶瓷及金属封接提供了一定的理论参考价值。
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A screening and cultivation method for Bacillus thuringiensis of high-yield high temperature resisting protease includes the following steps: high-yield high temperature resisting protease Bacillus thuringiensis Bt140 is obtained through adopting casein substrate agar to identify flat primary screen and fermenting enzyme activity measuring secondary screening; Plackett-Burman design and response surface analytical method are adopted to obtain optimal fermentation zymogenic formula and fermentation condition for Bt140 quickly; finally, shaking fermentation level reaches to 918.56U/mL.
一种高产耐高温蛋白酶的苏云金芽孢杆菌筛选及培养方法,采用酪蛋白底物琼脂鉴定平板初筛与发酵酶活测定复筛的方法获得高产耐高温蛋白酶苏云金芽孢杆菌Bt140;采用Plackett-Burman设计与响应面分析法快速获得了Bt140最佳的发酵产酶配方与发酵条件,最终摇瓶发酵水平可达918.56U/mL。
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The subject function values used nine indexes in tomato of high temperature stress including the rate of fruit setting, the relative output, the index of rolling leaves, the stabilization of membrane, the relative geminating of pollens, the contents of dissociating proline and the content of soluble sugar.
通过对高温下番茄的坐果率、相对产量、卷叶指数、相对生长量、膜稳定性、相对花粉萌发率、热害指数,以及游离脯氨酸和可溶性糖含量等9项指标的测定,采用隶属函数数值法,综合比较鉴定了耐高温能力不同的6个番茄品系。
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The main research work of this dissertation is as follows: Based on the chemical reaction engineering theory and the nitrobenzene electroreduction mechanism, the plate and frame electrolyzer was designed and applied to the process of electroreduction nitrobenzene to p-aminophenol. This dissertation measured the residence time distribution data of the electrolyzer by means of the pulse response method and studied the rule of flow pattern along with the current capacity change. Under different conditions ,this dissertation studied the cyclic voltammetry properties of nitrobenzene on different electrodes by means of the dynamic cyclic voltammetry method and the electrode materials applied to the NB electroreduction have been selected primarily.Baseed on the results of cyclic voltammetry tests, this dissertation used p-electrode systems to measure the steady-state- polarization curves of nitrobenzene on different electrodes in H-type diaphragm cell, and obtained each primary factor s influence rule and the exchange current density value of each electrode.And then on the basis of the conclusions of fundamental researchs upword, the effects of influence factors on the the yield of p-aminophenol and the current efficiency,such as electrode material, current density, quantity of electricity circulated, nitrobenzene concentration . sulpuric acid concentration and so on, have been studied in detail in the systems of hign temperature , strong acidity and oxygen-poorthrough a series of electrolysis experiments in this paper.After all using Pb as anode Monel metal as cathode Dupont Nafion 417 cation-exchange membrane as membrane, this dissertation obtained the optimum technological condition: reaction temperature about 85C, current density 500A m-2, sulphuric acid concentration 20%wt.
论文的主要研究工作为:运用化学反应工程理论,结合硝基苯的电还原机理,设计出用于硝基苯直接电还原合成对氨基苯酚实验的板框式电解槽,并利用脉冲响应法测定了该板框式电解槽的停留时间分布数据,研究了流型随流量变化的规律;通过动态循环伏安法研究了硝基苯在不同电极上、不同条件下的循环伏安特性,初步评选出了用于硝基苯电还原的电极材料;结合循环伏安的测定结果,在H型隔膜电解槽中采用三电极体系测定了硝基苯在不同电极上、不同条件下的稳态极化曲线,得到了各主要因素的影响规律及硝基苯在各个电极上电还原的交换电流密度数值;在基础研究结论指导下,采用板框式电解槽,在高温、强酸、贫氧系统中,进行了一系列的电解实验,分别考察了电极材料、电流密度、通电量、硝基苯浓度、硫酸浓度等因素对收率及电流效率的影响,最终选择以蒙乃尔合金电极作为阴极、铅合金为阳极、Dupont Nofion 417阳离子交换膜为隔膜,得到由硝基苯直接电还原制对氨基苯酚的最佳电解工艺条件:反应温度85℃,电流密度500A·m~(-2),硫酸浓度20%wt。
- 更多网络解释与高温测定法相关的网络解释 [注:此内容来源于网络,仅供参考]
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pyrometry:高温测定法
pyrometric cone equivalent 测温锥等值 | pyrometry 高温测定法 | pyrophobia 恐火症
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pyrophobia:恐火症
pyrometry 高温测定法 | pyrophobia 恐火症 | pyrophore 引火物
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pyromucic acid:焦粘酸
pyrometry 高温测定法 | pyromucic acid 焦粘酸 | pyrone 吡喃酮
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pyrometric cone equivalent:测温锥等值
pyromaniac 放火狂者 | pyrometric cone equivalent 测温锥等值 | pyrometry 高温测定法