西藏措勤尼雄地区地面磁法测量及其地质意义

在《西藏措勤-昂仁地区铁铜矿评价》工作中,安排了1∶ 5万地面磁法测量.地面ΔT表明：整个工区属磁异常区,表现出北西低、南东高的总趋势.通过对磁测资料的转换处理,发现磁场特征与青藏高原中西部航磁调查所反映的地球物理特征基本吻合,反映了全工区磁场的变化特征,证实了藏C-99-297航磁异常的存在,应为矿致异常,可以指导青藏高原中西部找矿工作.通过对磁测剖面数据的推断,结合异常查证,在全工区圈出一批具有找矿意义的异常,为今后该地区基础地质研究和矿产资源评价提供了可靠的地球物理资料,并为今后在青藏高原开展矿产资源评价工作提供了切实可行的工作思路.     

掺杂ZrO_2、TiO_2、γ－Al_2O_3对Pt、Pd／Al_2O_3燃烧

运用ＸＲＤ、ＢＥＴ、ＤＴＡ等测试技求，研究并考察了掺杂ＺｒＯ＿２、ＴｉＯ＿２、ｒ－Ａｌ＿２Ｏ＿３对Ｐｔ－Ｐｄ／Ａｌ＿２Ｏ＿３燃烧催化剂性能的影响，结果表明，ＺｒＯ＿２对Ａｌ＿２Ｏ＿３晶相的γ型转为α型有明显的抑制作用，而ＴｉＯ＿２的添入则起促进作用；高温引起催化剂活性下降的主要原因是作为第一载体的Ａｌ＿２Ｏ＿３的比表面积和孔容减少以及Ａｌ＿２Ｏ＿３晶态从γ型转为α型所造成的。     

厌氧-好氧移动床生物膜工艺处理冰淇淋废水的试验研究

研究了厌氧污泥复合床 好氧移动床生物膜反应器串联工艺 ,处理冰淇淋生产废水的工艺性能和影响因素。试验结果表明 ,在进水CODCr 浓度平均为 3 0 0 0mg L ,厌氧反应器容积负荷 7～ 2 0kg m3·d ,好氧反应器容积负荷 1～5kg m3·d ,系统总水力停留时间 13 1～ 2 8h的条件下 ,该串联工艺的CODCr总去除率大于 90 %     

Carrier detection of duchenne muscular dystrophy through analysis of dna from deciduous teeth of a dead affected child

The sister of a child affected by Duchenne muscular dystrophy (DMD) was referred for genetic counselling to assess the risk of her being a carrier. Her brother had died 15 years previously at the age of 8. There were no other affected males in the family. There were no methods for DNA investigation at the time of the child's death and the family had never been studied for linkage with polymorphic probes on the chromosomal region Xp21. The only tissue from which an assessment of the risk could be made by DNA linkage analysis was two of the child's deciduous teeth that the parents had kept. DNA was extracted using a protocol described for the recovery of ancient DNA from museum specimens and archaeological finds. Multiplex amplification did not reveal deletions in 19 exons spanning the hot-spot regions for deletions within the dystrophin gene in Xp21. Linkage analysis using three highly polymorphic microsatellites demonstrated that the sister had not received the X chromosome borne by her brother. These results show that DNA extracted from teeth is a reliable source for molecular diagnosis.     

Accumulation of Hg(II) by microbial biofilms on suspended particulate matter

Accumulation of Hg(II) by microbial biofilms on suspended particulate matter     

涡电流分选机理及应用

介绍了涡电流分选的物理原理,分析了导体所受的成分力.描述了涡电流分选装置的结构以及涡电流分选的应用领域.研究表明:涡电流分选机具有结构简单、质量轻、斥力强(可调节)、对物料的适应性强、分选效率高以及处理量大等优点,可在环境保护领域,特别是在有色金属再生行业推广使用.     

DNA-based prenatal carrier detection for group a xeroderma pigmentosum in a chorionic villus sample

DNA-based prenatal carrier detection of group A xeroderma pigmentosum (XP-A) is reported. Chorionic villus sampling was done at the tenth gestational week in a pregnant woman whose first child suffers from XP-A. Genomic DNAs from the villi, proband, and parents were PCR (polymerase chain reaction)-amplified using three sets of primers, because the PCR and a subsequent enzyme digestion with HphI, AlwNI, or MseI may detect the three most frequent mutations of the XP-A complementing gene (XPAC) in Japanese XP-A patients. The results showed that the proband is a homozygote and that the parents and fetus are heterozygotes for a base substitution at the 3′ acceptor site of intron 3 of XPAC, indicating that the fetus is a healthy carrier of XP-A. This is the first case of prenatal carrier detection of the disorder.     

浙江湖州市青铜桥ZK01孔第四系沉积物磁性特征和古环境意义

通过对湖州市青铜桥ZK01孔第四系沉积物系统磁性参数测量及分析研究，发现根据磁参数的比值对沉积物中磁性矿物颗粒大小和成分的分析结果，与根据磁化率（k）、饱和等温剩磁（SIRM）、饱和剩磁矫顽力{（Bo）cr}的分析获得的结果两者有较好的一致性。ZK01孔以24．7m为界，上部磁性矿物浓度高、磁性矿物成分单一，磁性颗粒粒度变化不大；下部磁性矿物浓度低（底部除外），磁性矿物成分和磁性颗粒粒度变化大，沉积物中有多相磁性矿物的存在，并含有超顺磁晶粒混合物。ZK01孔剖面跨越了布容一松山极性带界线，在布容正向极性期，存在2个次级极性倒转事件。剖面可分出五个明显不同的磁性地层段，可能分别对应于不同时期的古气候条件。为进一步查清研究地区第四系地层结构、地层的划分和对比具重要意义。     

MBBR泥膜复合系统泥膜竞争关系的影响因素

为探究MBBR泥膜复合硝化系统内泥膜竞争关系，通过小试试验研究了水处理过程中常规因素（污泥浓度、DO、温度、C/N）对MBBR泥膜复合系统硝化效果的影响，分析了系统内污泥容积负荷和移动床生物膜反应器（MBBR，Moving-Bed Biofilm Reactor）生物膜容积负荷变化趋势，进而得出泥膜竞争规律.结果表明，MBBR泥膜复合系统容积负荷均大于单一污泥或MBBR生物膜系统的容积负荷.在一定范围内，污泥浓度、DO、温度与MBBR泥膜复合系统容积负荷呈现正相关，且系统内活性污泥在与MBBR生物膜在竞争DO和基质时优势明显，而MBBR生物膜则具有更强的耐低温能力.进水C/N与MBBR泥膜复合系统硝化负荷呈负相关，且活性污泥在应对进水C/N过高时较MBBR生物膜更具优势，MBBR的“镶嵌”则强化了系统SND效果.微生物群落变化显示MBBR泥膜复合系统内的硝化细菌优势菌属为Nitrospira，且悬浮载体生物膜对其富集能力明显高于活性污泥.     

青藏高原昆仑山垭口盆地晚上新世以来沉积物磁化率与气候变化

通过对青藏高原昆仑山垭口盆地磁化率、频率磁化率环境代用指标的分析,并与黄土—古土壤和深海δ18O记录的气候变化进行对比,结合剖面的岩性特征和年代序列以及前人所获得的粒度和孢粉资料,揭示了3.6~0.5 Ma期间昆仑山垭口盆地气候变化经历了六个阶段:3.6~2.48 Ma气候相对冷干、2.48~2.14 Ma气候偏凉湿、2.14~2.07 Ma气候相对冷干、2.07~1.16 Ma气候总体相对较湿润(其间有数次冷干波动)、1.16~0.78 Ma气候偏冷干以及0.78~0.5 Ma气候向冷湿发展。