拱型屋面弯曲回弹变形、强度和稳定性的研究

计算了拱型屋面弯曲回弹变形 ;分析了在对称和非对称载荷作用下拱型屋面弯曲应力 ;计算了在对称载荷作用下拱型屋面临界载荷 ,计算结果表明 :拱型屋面的破坏不是强度不足 ,而是失稳所致。     

利用造纸废物生产全粉煤灰轻质建筑材料研究(Ⅰ)

根据外营力自然成岩理论 ,探讨了利用造纸废物与粉煤灰生产复合材料的新理论、新工艺。在工业性试生产中产生的制品具有容重轻、强度高 ,隔热性能和憎水性良好的优点 ;同时 ,由于其吃灰量大 ( >95 % ) ,又为大规模利用粉煤灰开辟了新途径。     

上海雾天大气污染及雾水组分研究

首次较系统地监测调查了上海市雾天的大气污染状况，并分析了雾水的化学组分，结果表明，上海出现雾天时，不利于大气污染物的扩散，造成雾天大气污染较严重，污染物浓度高值出现的时间与雾的形成至消散基本同步，比起雾前高２－１０倍。     

造纸黑液固化技术及有机复合肥肥效试验研究

研究包括两项发明：黑液固化工艺和黑液固化物生产有机NPK复合肥。黑液固化采用交联技术，在常温常压下，向黑液中投加一定量的胶凝剂和交联剂，经搅拌、使黑液在短时间内由液变为固态；通过对固化物成份的分析，以黑液固化物为原料生产有机NPK复合肥，并与一般NPK复混肥进行水稻、花生的肥效对比试验，得出了以黑液固化物生产的有机NPK复合肥肥效优于一般NPK复混肥的结论。     

A case of partial sirenomelia and possible vitamin A teratogenesis

Prenatal echographical findings of a partial sirenomelic fetus are described. An attempt was made to terminate pregnancy by administration of prostaglandin F₂a, but uterine rupture occurred. The teratogenic role of vitamin A ingested by the mother in the penconceptional period is discussed.     

Applicability of DNA isolated from syncytiotrophoblast vesicles to gene amplification and molecular analysis

Maternal contamination of fetal DNA represents a major problem when highly sensitive molecular techniques are used in the prenatal diagnosis of genetic diseases. For this reason, we have studied the possibility of using DNA isolated from syncytiotrophoblast vesicles as a target of gene amplification (PCR). Three PCR systems were selected which included a repetitive 149 bp fragment of the Y chromosome, the VNTR locus D1S80, and a portion of the β-globin gene. The results of these experiments indicate that DNA isolated from syncytiotrophoblast vesicles is free of maternal contamination and is suitable for gene amplification and DNA analysis.     

利用微生物除臭技术研究与应用

简述了微生物在降解生产和生活中臭气方面的研究与应用,特别着重介绍了EM复合菌群在除臭方面的卓越效果,表明了生物除臭与物理、化学方法除臭相比具有彻底性、实用性与经济性的特点,在环境保护与资源的重复利用方面有着巨大的应用潜力。     

First-trimester biochemical and molecular diagnoses using chorionic villi: High accuracy in the U.S. collaborative study

The accuracy of biochemical and molecular prenatal diagnoses using chorionic villi as the fetal source was assessed by seven centres participating in the NICHD collaborative study on the safety and accuracy of chorionic villus sampling (CVS) and amniocentesis. Of 601 pregnancies studied, biochemical methods were used to determine the diagnosis in 283 fetuses at risk for 35 different metabolic disorders. Fifteen different lysosomal storage diseases accounted for 81 per cent of the biochemical prenatal diagnoses performed, with 57 per cent of these pregnancies at risk for Tay-Sachs disease. No errors were made in the biochemical diagnoses that predicted affected or unaffected fetuses. However, the diagnoses of certain disorders (e.g., mucopolysacchariodosis type IH, metachromatic leukodystrophy, and Krabbe disease) occasionally required confirmatory studies in cultured amniocytes because the enzyme results were inconclusive in direct and/or cultured villi or due to the presence of a pseudodeficiency allele. Of these, only the diagnosis of a fetus at risk for Krabbe disease remained inconclusive after special studies to discriminate between mutant and pseudodeficiency alleles. Recombinant DNA techniques were used to predict the diagnosis of 318 fetuses at risk for 16 different disorders in which the defective disease gene could be detected either directly or by linkage analysis to a nearby polymorphic marker. Of these, 32 per cent were for haemoglobinopathies, 25 per cent for cystic fibrosis, 24 per cent for Duchenne or Becker muscular dystrophy, and 7 per cent for haemophilias. Pregnancies at risk for known disorders with specific molecular lesions (e.g., sickle cell disease) were accurately diagnosed in direct and/or cultured villi. Diagnoses requiring analyses with closely linked polymorphic markers were occasionally uninformative or inconclusive. Maternal contamination was not reported in any biochemical or molecular-based diagnosis. These studies document the high accuracy and rapidity of both biochemical and mutation-specific prenatal diagnoses with direct and cultured chorionic villi.     

Processus advectifs et répartition du zooplancton dans un fjord

In order to study the influence of advective processes on the zooplankton distribution in a shallow sill-fjord, we examined the temporal variations (tidal and seasonal) of currents, density, abundance and composition of zooplankton in the Saguenay fjord, Québec, Canada, in August 1978 and October 1979. Our results demonstrate the existence of a regular exchange of water (every tidal cycle) between the St. Lawrence estuary and the two outer basins of the Saguenay fjord which is characterized by an important transport of mesoplankton from the estuary into the deep waters of the Saguenay during the rising tide and from the surface waters of the Saguenay to those of the estuary during falling tide. Variations of abundance and composition of zooplankton in the outer basin are therefore mainly controlled by advective processes. The plankton community of the downstream region of the fjord is strongly influenced by variations of abundance and composition taking place in the estuary, and the establishment and development of local populations of zooplankton are made difficult. In the upstream region of the fjord, the advective processes are less intense and endogeneous mesoplankton populations thrive under local temperature conditions.