铜作

This article mainly established the analysis method to extract the oxine-copper residues in cucumber and soil with ion pair of antiphase HPLC and Ultrasonic-assisted solvent. This method mainly uses XBridge C18 column and UV detector by using waters phase of phosphatic buffered solution/acetonitrile (60:40, by vol) as mobile phase with 0.8 mL/min flow ratio and UV detection at 250 nm. The residue time was 4.71 minute. Accuracy, precision, and sensitivity of the method all satisfy the demands of pesticide residue analysis.

建立了黄瓜和土壤中喹啉铜的超声波辅助溶剂提取－反相离子对高效液相色谱法的残留分析方法，该方法使用XBridge C18色谱柱和可变波长紫外检测器，并以水相磷酸盐缓冲溶液－乙腈（体积比为60：40）作流动相；流速为0.8 mL/min；检测波长为250 nm；保留时间为4.71 min；该方法的准确度、精密度及灵敏度均满足农药残留分析的要求。

The ultrasonic-assisted solvent extraction and quantitative analysis of the oxine-copper residues in soil with ion pair of antiphase HPLC was established. This methods mainly uses XBridge C5 column and UV detector by using waters phase of phosphatic buffered solution/acetonitrile (60:40, by vol) as mobile phase with 0.8 mL/min flow ratio and UV detection at 245 nm. The residue time was 4.72 minute. The linear correlation of this method was 0.9987. The recovery rate was 76.2 to 108.7%. Comparatively standard deviation was 0.6 to 3.37%. The detection limits of method was 0.05 mg/kg.

建立了土壤中喹啉铜的超声波辅助溶剂提取－反相离子对高效液相色谱法的残留分析方法，该方法使用XBridge C18色谱柱和可变波长紫外检测器，并以水相磷酸盐缓冲体系－乙腈（体积比60：40）作流动相；流速为0.8mL/min；检测波长为245nm；保留时间为4.72min；线性相关系数为0.9987，回收率在76.2%~108.7%之间，相对标准偏差在0.6%~3.37%之间，对土壤的最低检出限为0.05mg/kg。

The better technology has been obtained: taking water-EG as solvent 2-imidazolidinone was prepared. The molar ratio of the methanal (36%) to the formic acid (85%) is 1:2.8, reaction temperature is 95~100℃, reaction time is 16 h, taking cuprous chloride and triethylamine as catalyst, the molar ratio of the cuprous chloride and triethylamin to 2-imidazolidinone is 1.0% while 1,3-DMI was prepared.

较佳工艺条件为：制备2-咪唑啉酮时，以水－乙二醇混合作溶剂；制备1，3-DMI时，甲醛(36%)：甲酸(85%)摩尔比为1：2.8，反应温度95~100℃，反应时间16 h，氯化亚铜和三乙胺作催化剂，用量分别是2-咪唑啉酮摩尔数的1.0%。

In this paper, the nanometer Co-Cu-B alloy powders had been prepared in solution of mixing cupric and cobaltous sulphate, by liquid reduction process, on the condition of pure water and the ethanol-water system, using KBH4 as a reducer, PVP as a dispersant.

本研究采用液相还原法，以KBH4作还原剂，PVP作分散剂，分别在二价钴、铜硫酸盐的纯水体系和乙醇-水体系下合成了纳米Co-Cu-B合金粉末。

The results show that jamesonite and pyrrhotite have good floatability in the pH range of 2-10 and marmatite has good floatability in the acid and it is difficult to separate these minerals. In the pH range of 6-8, the separation of jamesonite and pyrrhotite, marmatite is possible when using mercaptoacetic acid and mercaptoethanol as depressants. In case of the presence of Cu2+ ion, however, it is difficult to separate the three minerals. Infrared spectrum demonstrates that there are a number of function groups such as —SH,—COOH,—OH in the molecular structure of depressant.

结果表明：用丁黄药作捕收剂，脆硫锑铅矿和磁黄铁矿在pH 2~10范围内都有良好的可浮性，铁闪锌矿在酸性条件下可浮性好，三者分离困难；在pH 6~8之间，采用巯基乙酸和巯基乙醇作抑制剂，脆硫锑铅矿与磁黄铁矿和铁闪锌矿的分离是可能的；但铜离子存在时， 3种矿物之间的选择性分离是难以实现的。

It is divided into three chapters. First chapter will describe the procreant background and the present condition of Gigabit Ethernet network. After that, this part will continue to present the sixth copper cable composing Ethernet bit network in detail from these three aspects: design, construction and testing. Especially, it also analyzes the main testing parameters of Gigabit Ethernet network and possible reasons of influencing testing results.

本文第一章首先探讨了千兆网络的产生的背景和现状，然后从六类铜缆千兆网络的设计、施工和测试三个方面，对于这种新型的网络作了较为详细的阐述，并着重分析了六类铜缆千兆网络的主要测试参数及影响测试结果的原因。

Mainly supply imported and famous-brand special steel,including ASSAB、BOHLER、HITACHI、DAIDO、SINTO、SAARSTAHL、BUDERUS、ALLEGHENY LUDLUM 、BRUSH WELLMAN、ALCOA and domestic special mold steel, copper, aluminum, and non-metal materials from large scale special ste钢材价格走势图el enterprise. We have enough inventory of cold-working steel, heat-working steel, plastic mold steel, and powder steel, etc, a full series of top quality mold steel, to supply to large and medium enterprise,moreover,we offer 24 hours cutting and quick delivery service,Besides,we offer 6-sides mill processing for gloss and fine plates,heat treating, and other service, too.

主营进口特殊钢，销售品牌有瑞典ASSAB、奥地利BOHLER、日本HITACHI、DAIDO、SINTO、德国BUDERUS、美国ALLEGHENY LUDLUM、 BRUSH WELLMAN、ALCOA及国内大型特钢企业生产的特殊模具钢、铜、铝、及非金属用材，品种齐全，现货供应，备料充足，为各大中企业客户提供冷作钢、热作钢、塑模钢、粉末钢等全系列高品质模具钢种，而且提供24小时锯料及每天快捷发货服务；另提供六面铣的光、精板铣磨等精机加工，材料热处理等一条龙服务、一体化保证。

Mainly supply imported and famous-brand special steel,including ASSAB、BOHLER、HITACHI、DAIDO、SINTO、SAARSTAHL、BUDERUS、ALLEGHENY LUDLUM 、BRUSH WELLMAN、ALCOA and domestic special mold steel, copper, aluminum, and non-metal materials from large scale special steel enterprise. We have enough inventory of cold-working steel, heat-working steel, plastic mold steel, and powder steel, etc, a full series of top quality mold steel, to supply to large and medium enterprise,moreover,we offer 24 hours cutting and quick delivery service,Besides,we offer 6-sides mill processing for gloss and fine plates,heat treating, and other service, too.

主营进口特殊钢，销售品牌有瑞典ASSAB、奥地利BOHLER、日本HITACHI、DAIDO、SINTO、德国BUDERUS、美国ALLEGHENY LUDLUM、 BRUSH WELLMAN、ALCOA及国内大型特钢企业生产的特殊模具钢、铜、铝、及非金属用材，品种齐全，现货供应，备料充足，为各大中企业客户提供冷作钢、热作钢、塑模钢、粉末钢等全系列高品质模具钢种，而且提供24小时锯料及每天快捷发货服务；另提供六面铣的光、精板铣磨等精机加工，材料热处理等一条龙服务、一体化保证。

Copper fixation rate affected by retention, fixation time, ligand type, and addictive. For all formulations, while other three conditions is the same, copper fixation rate of preservatives with low retention level is less than those with higher retention level; copper fixation rate of oven-dried bamboo samples is less than air-dried bamboo samples; copper fixation rate of amine-based preservatives is less than ammonia-based ones; copper fixation rate in some formulations containing carbonate and phosphate is higher than non-carbonate and non-phosphate ones.

在其它条件相同时，高吸药量时防腐剂的固着率明显高于低吸药量时的固着率；固着时间长的试样比固着时间短的试样具有更高的铜固着率；以氨水作配体的防腐剂固着性高于以乙醇胺作配体的；碳酸盐和磷酸盐在某些配方中能够改善防腐剂固着性。

Cathodic polarization curve, covering power, throwing power and operation temperature range of the brightener had been tested and had been compared with those of two kinds of abroad brightener.

介绍了酸性镀铜光亮剂，并与使用较多的两种国外酸铜光亮剂的阴极极化曲线、镀液的深镀能力、均镀能力、耐温工作范围等作了对比。

In the United States, chronic alcoholism and hepatitis C are the most common ones.

在美国，慢性酒精中毒，肝炎是最常见的。

If you have any questions, you can contact me anytime.

如果有任何问题，你可以随时联系我。