Monitoring the winds of hot stars with HST/GHRS

We present observations obtained with the Goddard High Resolution Spectrograph (GHRS) of three O-type stars: per (O7 III), Cep (O6 Iaf) and 10 Lac (O9 V). These observations show evidence of instabilities in the winds of all three stars, although not necessarily those expected from current models of structured winds.Based on observations with the NASA/ESAHubble Space Telescope, obtained at the Space Telescope Science Institute, which is operated by AURA for NASA under contract NAS5-26555     

Fe xiixii emission lines in solar active regions observed by the RES-C spectroheliograph on the CORONAS-I mission

Theoretical line intensity ratios involving Fe  xii transitions in the 186–201 Å wavelength range are compared with observational data for five solar active regions, obtained by the RES-C spectroheliograph on the CORONAS-I mission. Generally good agreement is found between theory and observation, hence resolving discrepancies previously found in the comparison of calculations with active region and subflare spectra from the Solar EUV Rocket Telescope and Spectrograph ( SERTS ). However, the Fe  xii 190.06- and 201.12-Å lines are blended with Fe  x 190.04 Å and Fe  xiii 201.13 Å, respectively. In addition, a weak feature at ∼197 Å, tentatively identified as Fe  xii 196.87 Å, does not appear to be due to this ion.     

1961～2000年中国生态区紫外辐射的时空演变特征

通过ANUSPLINE空间插值以及气候学意义上的幂函数换算,探讨中国大陆生态区紫外辐射时空动态变化规律。结论如下:(1)紫外辐射多年平均值和多年季节平均值大致以季风区和非季风区分界为界线,呈现西部高东部低的总体格局,这主要与中国的地势和气候特点有关。(2)部分生态区40 a来年和四季紫外辐射呈显著减少趋势;冬季的紫外辐射年际间变化程度较大,其次是夏季和秋季,春季和年均紫外辐射年际变化较小;可分1961~1972、1973~1990、1991~2000年3个时段,大部分生态区第二时段年和季节紫外辐射平均值较小,第三时段普遍又开始增大,比第一时段小。     

南京地区紫外辐射初步研究

采用简化型辐射传播模型计算了南京地区到达地表的太阳紫外辐射（ＵＶ辐射）,同时根据地面紫外辐射的观测资料分析了南京地区紫外辐射的年变化、晴天与阴天的变化规律及与太阳总辐射的关系。     

Influence of Oxidative Treatment on the AOX‐formation Potential of Aromatic Sulfonates

Aromatic sulfonates can be found in drinking water. Thus, they must have passed water treatment and survived ozonation. Degradation of aromatic sulfonates can be achieved by the UV/H2O2‐process. Since drinking water is often treated with chlorine as a disinfectant, the formation of disinfection by‐products has to be considered. Therefore, the production of AOX (on activated carbon adsorbable organic halogens) after chlorination of the sulfonates with and without preoxidation was investigated. Instead of the analysis of the individual degradation products, the determination of the sum parameter AOX was used as a fast screening method. The investigated sulfonates were: anthraquinone‐2‐sulfonate, naphthalene‐2‐sulfonate, 2‐aminonaphthalene‐1‐sulfonate, and 4,4′‐diaminostilbene‐2,2′‐disulfonate. All sulfonates containing amino groups showed high potentials of AOX formation. The preoxidation with ozone increased the potentials of AOX formation in general. Treating the sulfonates by using the UV/H2O2‐process, the formation potentials run to zero after going through a maximum value.     

Modifications of the curcumin method enabling precise and accurate measurement of seawater boron concentration

To achieve greater precision and accuracy in the measurement of seawater boron concentrations, we propose a series of modifications to an established (curcumin) method based on the reaction of boric acid with curcumin. The modifications were derived from a series of experiments evaluating the stability of the curcumin–acetic acid reagent, the dependence of the reaction on temperature and duration, the effect of evaporation during the dehydration process, the interference of water, and the effect of sea salts. Application of the modified method to analysis of seawater samples collected from the Pacific Ocean indicated that it yielded considerably better precision and accuracy for boron concentration measurements than both the conventional curcumin method and other analytical techniques.     

中国对虾人工诱导雌核发育的研究Ⅰ──四步诱导法

１９９０～１９９３年于青岛采用研究鱼类人工诱导雌核发育相类似的方法 ──紫外线照射精子、受精、温度或细胞松胞素Ｂ处理卵子方法，对中国对虾进行 人工雌核发育的研究。实验结果，有三批材料获得较好的效果：二批培育到蚤状幼 体，另一批培育到３～３．５ｃｍ幼虾。经受精细胞学观察，被照射的精子经受精，其核 有的不能原核化，有的虽能原核化，且能向中央迁移，但都不能与卵原核结合。实验 表明，这三批育出的个体是雌核发育的个体。     

光降解-过硫酸钾方法分析水中溶解有机磷

对紫外(UV)光降解-过硫酸钾方法分析溶解有机磷的条件进行比较分析,在UV/加热条件下溶解有机磷的氧化率最高.进一步考察氧化剂的酸碱性和浓度对溶解有机磷氧化率的影响.Cl-和海水介质可以使溶解有机磷的氧化率显著降低.可以通过改变UV灯的功率、反应时间、反应温度、氧化剂等条件提高溶解有机磷的氧化率.     

不同粒径镁铝水滑石的合成及其紫外阻隔性能研究

采用水热合成法,以六水氯化镁为镁源,六水氯化铝为铝源,通过改变沉淀剂种类、水热温度和水热时间等条件,实现了不同粒径镁铝水滑石的可控制备。多晶X射线衍射、扫描电子显微镜、红外光谱和原子发射光谱测试表明合成了具有相同化学组成、不同粒径的片状镁铝水滑石,产物平均横向尺寸的可控范围在63 nm～5μm之间。紫外光屏蔽实验显示,横向尺寸为136～270 nm的镁铝水滑石具有最佳的紫外阻隔性能,这一结果可以用光散射理论进行解释。