除氧技术在热水锅炉循环系统中的应用

介绍热水锅炉补给水几种除氧的主要方法，并对这几种方法进行分析和总结。     

对血红蛋白的结构及氧离曲线形成的探讨

简述了血红蛋白的结构及其所形成的氧离曲线的特征，并分析氧离曲线的形成原因及影响因素。     

炭疽研究进展

从生物学的角度，就炭疽与炭疽杆菌的生物学特点、病原学、致病性与症状类型、传播、免疫性、诊断、预防和治疗作了综合评述。     

Polychlorinated dibenzo-p-dioxins and dibenzofurans in flue gas emissions from municipal solid waste incinerators in China

Polychlorinated dibenzo-p-dioxins and furans （PCDD/Fs） emissions in flue gas from two types of municipal solid waste incinerators （MSWIs） most commonly used in China were investigated in this study. The selected incinerators include two grate-type MSWIs： MSWI-A （350 t/d） and MSWI-B 050 t/d）, and two fluidized bed MSWIs： MSWI-C （400 t/d） and MSWI-D （400 t/d）, which are all equipped with semi-dry lime scrubber and bag filter except MSWI-D equipped with cyclone and wet scrubber （WS） as air pollutant control device （APCD）. Results indicated that the emission concentration and the international toxic equivalents （I-TEQs） of the PCDD/Fs from the stacks were in the range of 1.210-10.273 ng/Nm^3 and 0.019-0.201 ng I-TEQ/Nm^3, respectively. They were greatly lower than the emission regulation standard of PCDD/Fs in China （1.0 ng I-TEQ/Nm^3）. However, only the PCDD/Fs emission level from MSWI-C was below 0.1 ng I-TEQ/Nm^3. Although the homologue profiles were distinct, the contributions of the 2,3,7,8-subsituted congeners to the total I-TEQ were similar among all the investigated MSWIs. Two major 2,3,7,8-substituted congeners, 2,3,4,7,8-PeCDF and 1,2,3,7,8-PeCDD, account for 47% and 9% （average values） of the total I-TEQ values, respectively. The correlation between PCDD/Fs levels and composition of flue gas was also discussed.     

青海民和黄土1.87MaBP以来的气候演化

通过对青藏高原东北缘的民和黄土的磁化率，粒度，CaCO3和TOC等气候载体进行综合测试分析，可以将青藏高原东北缘黄土1．90MaB.P.-0.70MaB.P.段划分出7个气候阶段。对民和黄土的气候分析表明，1.10MaB.P.（民和黄土的L11黄土层）前气候差异较小，冬夏季风不强，对抗性较弱，黄土古土壤发育不明显，厚度较薄；1.10MaB.P.后，冬夏季风对抗性迅速增强，气候差异性增强。将民和黄土与其它地区以及深海沉积物氧同位素记录进行对比可以发现，民和黄土的S8，S9和S10古土壤分别与深海氧同位素21，23和25阶段较好地对应，而L9，L10和L11则分别对应22，24和26阶段。L11黄土层以下的黄土记录与深海氧同位素记录的可比性不是很明显。     

Polychlorinated dibenzo-p-dioxins and dibenzofurans in flue gas emissions from municipal solid waste incinerators in China

Polychlorinated dibenzo-p-dioxins and furalls(PCDD/Fs)emissions in flue gas from two types of municipal solid waste incinerators(MSWIs)most commonly used in China were investigated in this study.The selected incinerators include two grate-type MSWIs:MSWl-A(350 t/d)and MSWI-B(150 t/d),and two fluidized bed MSWIs:MSWI-C(400 t/d) and MSWI-D (400 t/d),which are all equipped with semi-dry lime scrubber and bag filter except MSWI-D equipped with cyclone and wet scrubber(WS)as air pollutant conffol device(APCD).Results indicated that the emission concentration and the international toxic equivalents(I-TEQs)of the PCDD/Fs from the stacks were in the range of 1.210～10.273 ng/Nm3 and 0.019～0.201 ngI-TEQ/Nm3,respectively.They were greatly lower than the emission regulation standard of PCDD/FS in China(1.0 ng I-TEQ/Nm3).However,only the PCDD/Fs emission Ievel from MSWI-C Was below 0.1 ng I-TEQ/Nm3.Although the homologue profiles were distinct,the contributions of the 2,3,7,8-subsituted congenem to the total I-TEQ were similar among all the investigated MSWIs.Two major 2,3,7,8-substituted congeners,2,3,4,7,8-PeCDF and 1,2,3,7,8-PeCDD,account for 47% and 9%(average values)of the total I-TEQ values,respectively.The correlation between PCDD/Fs levels and composition of flue gas Was also discussed.     

低高径比液泵型生物反应器容积氧传质性能的研究

对低高径比(H／D=2．27)的液泵型环流生物反应器通过正交试验分析了DE／D、LE／D、ωc％三因素在不同水平下对容积氧传递系数的影响程度，以容积氧传递系数为评价指标，在试验范围内得出了导流筒直径DE及其高度LE的最优值，并针对取样高度的不同测试了其对容积氧传递系数的影响曲线，对容积氧传递系数随通风比(V/V)的变化曲线作了分析．在以上试验结果的基础上，将该反应器与磁力搅拌生物反应器进行了对比．     

兽药乙氧酰胺苯甲酯合成工艺的改进

球虫酯(Ethopabate,又名依索巴),化学名为2-乙氧基-4-乙酰胺基苯甲酸甲酯(Methyl4-ac-etamino-2-ethoxybenzate),是广谱抗球虫兽。对球虫酯耐受性实验表明,饲料中浓度为80~100mg/L以下,不会对鸡的生长产生明显负作用,所以探讨球虫酯可行的合成路线并且将其工业化,有切实的应用价值。     

体育教学中兴趣与强迫运动的辩证统一

<正>1体育兴趣与体育教学的相互关系(1)体育心理兴趣是指人对体育器材,在竞赛中人与人之间的关系、竞赛规则、内容等不是由于肌肉收缩产生的兴趣。体育生理兴趣包括主动体育生理兴趣和被动体育生理兴趣。①主动体育生理兴趣是人体经过运动时或运动后产生的,肌肉对运动时产生兴奋的依赖感。②被动体育生理兴趣是人体为达到某种目的参与体育锻炼,强迫肌肉进行有氧消耗或无氧消耗,肌纤维在大量代谢产物的不良刺激下进行收缩,以满足为某种目的需要而进行的体育锻炼。     

社区和医院环境对鼻腔耐甲氧西林金黄色葡萄球菌定植影响研究

目的:了解社区和医院两种不同环境对鼻腔耐甲氧西林金黄色葡萄球菌(MRSA)定植的影响。方法:用鼻拭子法采集108例未进入临床实习医学生和99例正进行临床实习医学生鼻腔样本,用金黄色葡萄球菌显色培养基培养筛查金黄色葡萄球菌,并通过PCR方法检测SCCmecA基因,进行MRSA的鉴定。比较两个群体中MRSA携带率的差异,分析社区和医院环境对MRSA在人鼻腔定植的影响。结果:108例未进入临床实习医学生共检出金黄色葡萄球菌(SAU)菌株44例,MRSA菌株8例,MRSA检出率7%,99例进入临床实习医学生共检出SAU菌株59例,MRSA菌株21例,MRSA检出率21%。实习组MRSA携带率是未实习组的2.86倍,两种不同环境下造成的MRSA阳性率不同具有统计学意义(χ~2=8.171,P<0.05)。结论:社区和医院两种不同环境对鼻腔耐甲氧西林金黄色葡萄球菌定植有显著影响,长期处于医院环境可使鼻腔MRSA定值率显著提高。