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排序方式: 共有1046条查询结果,搜索用时 15 毫秒
981.
Dr. Suprapto H. Sastrowijoto M.D. Phd. Kamiel Vandenberghe Philippe Moerman Joseph M. Lauweryns Jean-Pierre Fryns 《黑龙江环境通报》1994,14(8):770-776
Rhizomelic chondrodysplasia punctata (RCDP) is a sublethal autosomal recessive disorder characterized by skeletal dysplasia, microcephaly, mental retardation, congenital cataracts, joint contractures, skin changes, and failure to thrive. Prenatal ultrasound diagnosis has been reported during the second trimester of pregnancy. Prenatal diagnosis is also possible from the first trimester onwards by demonstration of peroxisomal dysfunction in cultured chorionic villous or amniotic fluid cells. In all cases reported hitherto, the prenatal diagnosis was established after the birth of a previous affected child. In contrast to these studies in pregnant multiparous women at risk for RCDP, we report on the first case of prenatal ultrasound diagnosis of RCDP at 19 weeks' gestation in a primigravida. In addition, a complex cardiac malformation associated with hypoplasia of the thymus (DiGeorge anomaly) is described. 相似文献
982.
This paper summarizes our experience with a series of 562 women referred for mid-trimester amniocentesis for prenatal diagnosis. Ultrasonography was utilized for placental localization. Follow-up revealed a fetal loss rate of 3.03 per cent with 1.96 per cent being spontaneous abortions. Patients with an anterior placenta had a fetal loss and spontaneous abortion rate of 4.06 per cent and 3·05 per cent, respectively. No significant difference in the incidence of fetal loss (p > 0·1) or spontaneous abortion (p > 0·5) was found in patients having an anterior versus a posterior placenta. Neither multiple insertions through an anterior placenta nor blood contaminated amniotic fluid from patients with an anterior placenta were associated with an increased incidence of fetal loss or spontaneous abortion. 相似文献
983.
In situ remediation of soils contaminated with toxic metal ions using microwave energy 总被引:15,自引:0,他引:15
Following onto our work on the in situ remediation of soils contaminated with PAH's, PCB's and other polychlorinated organic compounds using microwave energy, we now report a preliminary investigation on the in situ remediation of soils contaminated with toxic metal ions: Cd(II), Mn(II), Th(IV), Cr(III) and mainly Cr(VI). The soil is partially vitrified in the process, and extraction with hot (70 degrees C) 35% nitric acid for 4.5 h leads to the recovery of very small amounts of the metals which had been spiked into the clean soil: Cd, Mn, and Cr(III) are completely immobilized (unextractable), Th is mostly unextractable, and Cr(VI) partially extractable at very high levels of spiking, but almost completely unextractable using the US EPA Toxicity Characteristic Leaching Procedure. This suggests that contaminated soils which are not going to be used for agricultural purposes can be remediated safely to preset depths without fear of the toxic metal ions leaching out for a long time. 相似文献
984.
The WHO Study Group on Training and Evaluation in Occupational Medicine has recently emphasized the importance of incorporating theoretical and practical aspects of stress prevention and management in the professional training of occupational health practitioners. Such a course was developed for the Tel-Aviv University Medical School graduate program in occupational health. The course objectives are consistent with the current call for improved training in psychosocial issues in medical care. Twenty-three occupational health practitioners (physicians, nurses, hygienists and social workers) participated in a bi-semester course. The first part included a stress management and prevention program based on the RET (Rational-Emotive Training) model. The second involved developing and implementing a field project on primary and secondary prevention of stress and its outcomes. Pre-, mid-and post-course questionnaires showed significantly improved psychosocial ability and reduced irrational/dysfunctional thinking, considered a causal factor in stress and burnout. Acquiring such anti-stress resources may benefit practitioners and clients/patients, both potential victims of occupational stress alike. We recommend the inclusion of such extended courses to the professional training of occupational health practitioners. 相似文献
985.
Joseph E. Champoux 《组织行为杂志》1991,12(5):431-446
This paper reports the results of a multivariate test of the Job Characteristics Theory of Work Motivation using data from employees of a state agency in the United States. A canonical correlation analysis was done first to determine whether there was a statistically significant multivariate relationship among the variables. A hierarchical multiple regression analysis was then done to test main effects and interactions. The results of the study were mostly supportive of predictions from the theory. The interactions with Growth Need Strength were different in form for low and high GNS people. The implications of the results for both the theory and job redesign practice are discussed. 相似文献
986.
Joseph Fiksel 《环境质量管理》1993,3(2):181-192
There is a growing commitment by manufacturers, both in the United States and abroad, to assure environmental responsibility for all of their operations. This trend is driven partly by market demands for “green” products and partly by changes in international standards and regulations. In response, leading companies are demonstrating that environmental improvement can actually increase profitability, and design for environment (DFE) is emerging as an important business practice. The ability to evaluate environmental quality in objective, measurable terms is a key component of an effective DFE capability. In particular, environmental quality metrics are essential to support goal setting, monitoring, and continuous improvement in the design of products and processes. This article describes environmental quality measurement tools and procedures, particularly as they relate to DFE. One of the challenges of performance measurement is to incorporate a life-cycle view of environmental performance into measurement tools that can be easily computed and tracked. 相似文献
987.
988.
This field experiment examined the main and interactive effects of self-efficacy and feedback (i.e. the use of feedback versus no feedback) on performance in a speed reading class. Results showed that the provision of feedback was beneficial to the performance of all subjects, however as subject self-efficacy increased, the beneficial effects of feedback to the subject's performance also increased. Subjects who received feedback on their performance experienced significantly greater increases in self-efficacy than subjects who received no feedback. The more positive the performance feedback received, the greater the increase in individual self-efficacy. The implications of these results for training programs are discussed. 相似文献
989.
Patrick W. Corrigan E. Paul Holmes Daniel Luchins Brett Buican Abdul Basit Joseph J. Parks 《组织行为杂志》1994,15(1):65-74
Previous research has shown that burnout in staff members at psychiatric hospitals is significantly associated with state anxiety and collegial support. The directionality of these relationships may be inferred using a cross-lagged panel design. To do this, 35 staff members representing various clinical disciplines completed measures of burnout, support, and anxiety twice, eight months apart. Burnout comprised three factors: emotional exhaustion, depersonalization, and personal accomplishment. Findings from one cross-lagged panel suggested that emotional exhaustion causes state anxiety. The second panel showed that lack of collegial support caused depersonalization. Understanding causes and effects of burnout for inpatient psychiatric staff may lead to training and resource development that will improve the quality of their work environment. 相似文献