中国金红石矿床成矿地质条件及成矿远景

中国金红石矿床成因类型不一,控矿因素各异。通过对地层、构造(包括大地构造环境及褶皱)等控矿因素,区域变质作用、岩浆作用、热液作用、风化及沉积作用等成矿地质条件及矿床分布等规律的归纳与研究,提出了陕西石泉-镇坪、陕西丹凤-西峡、河南南召-方城、湖北枣阳-河南新县、湖北英山-潜山、江苏徐州-东海、山东栖霞-荣城、山西代县-河北涞水、四川会东9个金红石成矿远景区。并圈定出山东省荣城曲家、安徽凤阳板桥、湖北郧西土门—涧池、湖北七里坪大悟仙山、山西代县义成沟—羊廷寺、河北涞源司各庄、河北丰宁黄土梁等7个找矿靶区。     

Impacts of Aerosol-Radiation Interactions on the Wintertime Particulate Pollution under Different Synoptic Patterns in the Guanzhong Basin,China

The effects of aerosol–radiation interactions(ARI) are not only important for regional and global climate, but they can also drive particulate matter(PM) pollution. In this study, the ARI contribution to the near-surface fine PM(PM2.5)concentrations in the Guanzhong Basin(GZB) is evaluated under four unfavorable synoptic patterns, including "northlow", "transition", "southeast-trough", and "inland-high", based on WRF-Chem model simulations of a persistent heavy PM pollution episode in January 2019. Simulations show that ARI consistently decreases both solar radiation reaching down to the surface(SWDOWN) and surface temperature(TSFC), which then reduces wind speed, induces sinking motion,and influences cloud formation in the GZB. However, large differences under the four synoptic patterns still exist. The average reductions of SWDOWN and daytime TSFC in the GZB range from 15.2% and 1.04°C in the case of the"transition" pattern to 26.7% and 1.69°C in the case of the "north-low" pattern, respectively. Furthermore, ARI suppresses the development of the planetary boundary layer(PBL), with the decrease of PBL height(PBLH) varying from 18.7% in the case of the "transition" pattern to 32.0% in the case of the "north-low" pattern. The increase of daytime near-surface PM2.5 in the GZB due to ARI is 12.0%, 8.1%, 9.5%, and 9.7% under the four synoptic patterns, respectively. Ensemble analyses also reveal that when near-surface PM2.5 concentrations are low, ARI tends to lower PM2.5 concentrations with decreased PBLH, which is caused by enhanced divergence or a transition from divergence to convergence in an area. ARI contributes 15%–25% toward the near-surface PM2.5 concentrations during the severe PM pollution period under the four synoptic patterns.     

基于POM的物质输运方程数值格式研究

在三维海洋模式POM基础上建立水质模型,采用中心差分格式、迎风格式以及Smolarkiewicz迎风格式离散物质输运方程.以三维理想水槽中连续源排放的浓度场预测为例,分析3种离散格式求解所得的浓度场.结果表明,3种格式的数值解与解析解的偏差均小于20%.中心差分格式会引起解的震荡,导致物质的反向输移,出现浓度负值.迎风格式能够保证浓度的正值,但该格式带来的数值耗散导致数值解与解析解偏离较大.Smolarkiewicz迎风格式在普通迎风格式基础上引入抗扩散流速,经多次叠代,能有效降低计算中的数值耗散,提高了计算精度.     

山东近海溶解态无机营养盐的分布特征研究

根据2006年8月、12月和2007年4月、10月山东近海海区4个航次海水中溶解无机营养盐等的调查资料,分析了该海域5种溶解无机营养盐(包括PO4-P,NO3-N,NO2-N,NH4-N,SiO3-Si)的平面分布和时空变化特征.结果表明,5种营养盐在胶州湾内出现高值,平面分布整体上呈现沿岸浓度高、外海浓度低的趋势;根据绝对限制和相对限制法则,春季和夏季P为限制因子,秋冬季营养盐结构发生变化,由缺P向缺Si转变;SiO3-Si浓度随季节变化逐渐增加,其他营养盐浓度在春季和夏季较低,秋季达到最大值.秋冬季溶解无机营养盐周日变化受潮汐影响明显.     

养殖大菱鲆细菌性红体病病原菌的分离与鉴定

从患有红体病的养殖大菱鲆(Scophthalmus maximus)的肌肉中分离得到一株优势菌并记为H1.经人工注射感染证实H1即为引起养殖大菱鲆红体病的病原菌,其半致死量LD50为2.82×105CFU/mL,而低浓度(1.41×103 CFU/mL)没有造成死亡,但注射部位有脓肿现象,注射相同体积1.5%无菌生理盐水的对照组没有明显的症状,注射部位也无异常.革兰氏染色显示该菌为革兰氏阴性,菌体呈杆状,周生鞭毛.综合该菌的形态、常规生理生化特征和API32E鉴定结果,发现H1与迟钝爱德华氏菌的表性特征非常相似,相似率迭到99.9%.在分子水平上对其16SRNA基因序列的测定,同源性分析,结果表明H1与迟钝爱德华氏菌的亲缘关系最近,相似度达到99%.综合上述研究结果,将该菌株初步鉴定为迟钝爱德华氏茵(Edwardsiella tarda).     

基于公平性的水环境容量分配研究——以沱江流域为例

公平与效益是容量分配的两个重要原则.在我国目前采用的水环境容量无偿分配方式下,公平原则是需遵循的首要原则,在公平的基础上追求效益.以沱江流域为对象,综合考虑涉及区域的社会、经济、自然等客观因素,筛选指标确定系数对流域容量进行分配.应用经济学中衡量收入公平的基尼系数概念,对分配结果的公平性进行评估,给出综合体现社会性、经济性和历史性的水环境容量分配方案.     

一种水不溶灰树花菌丝体多糖(GF4A)硫酸酯化研究

以灰树花发酵菌丝体水不溶性多糖GF4A为原料,以三氧化硫三甲胺盐(SO3·Me3N)为酯化试剂,探讨了GF4A的硫酸酯化工艺.实验结果表明,当三氧化硫与GF4A中单糖摩尔比为5.8∶1、反应温度为80 ℃、反应时间6 h时,所得酯化产物(SGF4A)水溶性好、产率高.该产物硫酸酯取代度为1.6, 相对分子质量为88 kD.通过红外光谱及核磁共振碳谱分析表明,糖残基中所有C-6羟基以及部分C-4和C-2位羟基被酯化.体外实验表明,SGF4A具有较好的抗凝活性.     

水/离子液体界面聚合法制备聚苯胺微/纳米纤维

没有外加质子酸的条件下,以过硫酸铵作氧化剂,水和离子液体作为两相,采用"界面聚合法"成功制备出导电聚苯胺纳米纤维(d=100～190 nm),界面体系所使用的溶剂都为绿色溶剂,对环境无污染,实现了对传统界面聚合的改进.发现[APS]/[An]的比例,去离子水的加入以及搅拌时间对产物的形貌有重要影响.通过FTIR,UV-Vis,XRD进行了结构表征,证实所得的聚苯胺纳米纤维为掺杂态.     

Crystal Structure and Geometry-Optimization Study of N-(2-hydroxy-1-naphthaldene)-4-aminoantipyrme

N-(2-hydroxy-1-naphthaldene)-4-aminoantipyrine has been synthesized. The structure is determined by X-ray diffraction method and elemental analysis. The crystal system belongs to orthorhombic space group P(2)2(1)2(1). The geometry has been ob-tained from the density functional theory (DFT) method and the B3LYP method employing the 6-31G* basis sets. The calculated results propose that the latter is close to the experimental data. The structural parameters from the theory are close to those of the crystal and the calculated total energy of coordination is -31677.172 eV. The energy of HOMO and LUMO and the energy gap are 5.179 eV, -1.603 eV and 3.577 eV, respectively.