排序方式: 共有8条查询结果,搜索用时 31 毫秒
1
1.
2.
Gilad Heinisch Aldo Corriero Antonio Medina Francisco J. Abascal Jose-Miguel de la Serna Robert Vassallo-Agius Antonio Belmonte Ríos Antonio García Fernando de la Gándara Christian Fauvel Christopher R. Bridges Constantinos C. Mylonas Saadet F. Karakulak Isik Oray Gregorio De Metrio Hanna Rosenfeld Hillel Gordin 《Marine Biology》2008,154(4):623-630
Atlantic bluefin tuna (BFT; Thunnus thynnus) is a migrating species straddling the North Atlantic Ocean and Mediterranean Sea. It is assumed that this species is divided
into a western and an eastern stock, which spawn in the Gulf of Mexico and the Mediterranean Sea, respectively. To learn more
about the reproductive behavior of the eastern BFT stock, we tracked gonadal development in adult fish that were sampled between
April and July during three consecutive years (2003–2005). Sampling campaigns were carried out using common fishing methods
at selected locations within the Mediterranean Sea, namely Levantine Sea, Malta, and Balearic Islands. An additional sampling
point, Barbate, was situated northwest of the Straits of Gibraltar along the Atlantic coast. Morphometric parameters such
as the total body mass (M
B) and the weights of the gonads (M
G) were recorded, and the respective gonadosomatic index (GSI) values were calculated. The data collected revealed two important
trends: (1) GSI values are higher in fish caught in the eastern rather than the western locations across the Mediterranean
Sea, and (2) the GSI reaches maximum values between late May and early June in Levantine Sea (eastern Mediterranean Sea),
and only 2 and 4 weeks later in the central (Malta) and western (Balearic Islands) locations, respectively. The advanced gonadal
development in BFT correlates well with higher sea surface temperatures. Our findings also distinguish the northern Levantine
Sea BFT population (mean M
B 78.41 ± 4.13 kg), and the Barbate BFT population with the greatest M
B (all fish sampled > 100 kg). These data reflect a situation in which the eastern Mediterranean basin may function as a habitat
for young BFT, until they gain a larger M
B and are able to move to the Atlantic Ocean. However, the existence of genetically discrete BFT populations in the Mediterranean
Sea cannot be ruled out. 相似文献
3.
Gilad Chen 《组织行为杂志》2012,33(2):153-160
In 1997, Judge, Locke, and Durham published the core self‐evaluations (CSE) theory proposing that a multidimensional CSE construct, composed of emotional stability, self‐esteem, locus of control, and generalized self‐efficacy, accounts for individual differences in job satisfaction as well as in other organizational behavior outcomes. In this article, I argue that, despite ample evidence in support of the predictive validity of the CSE construct, the adequacy of including emotional stability, self‐esteem, locus of control, and generalized self‐efficacy as indicators of the CSE construct may be questionable, and I review evidence that points to limited convergent and discriminant validity of the CSE construct. I conclude the article with a few recommendations for advancing CSE theory and research. Copyright © 2011 John Wiley & Sons, Ltd. 相似文献
4.
The safety of the interior of ambulances is dubious and, in the event of sudden impact during emergency transport, potentially perilous to patients they carry. The workplace ergonomics of the interior of the passenger cabin is lacking. This article discusses an improved ergonomic interior design based on study findings, observations and subjective perception. It suggests design aspects and safety concepts aimed at increasing the safety of patients and paramedic staff inside the ambulance as a mobile workstation. 相似文献
5.
Issachar Gilad Daniel Boughanim 《International journal of occupational safety and ergonomics》2013,19(4):511-524
A 3-dimensional model and analysis methodology is suggested for treating lifting tasks when unbalanced loads are involved. The paper describes the biomechanical equations that are coupled with the worker’s posture geometry, to address a practical problem of non-symmetric lifting. The analysis has a dominant biomechanical modeling scope, as it contains a breakdown of the internal lifting forces resulting from posture and external loads acting on the body. The load model represents the acting forces due to unbalanced lifting, which is commonly found in industrial situations. The suggested model allows the user to simulate the influence of the practical load distribution, aiding safe design of a lifting job. 相似文献
6.
Issachar Gilad Daniel Boughanim 《International journal of occupational safety and ergonomics》2013,19(4):525-537
A computer driven technique to analyze lifting forces, in non-homogeneous load situations, is described and tested. Analysis is based on a dynamic algorithm aimed to evaluate unconstrained lifting posture and non-homogeneous content of loads. For inputs we use actual geometrical body postures in the form of 3-dimensional co-ordinates obtained from pictures taken at a work site. The outputs show a good match between the findings and pre-study assumptions for balanced and non-balanced load lifting practice. The results of the experiments show a good degree of correlation with results reported by researchers for symmetrical lifting tasks and with National Institute for Occupational Health (NIOSH) lifting guidelines. It is believed that the technique can serve as the proper choice for industrial and safety analysts of lifting activities. 相似文献
7.
To test whether general self‐efficacy and self‐esteem relate differently to motivational and affective constructs, we collected data from samples in academic and work settings. Results suggest that general self‐efficacy is more highly related to motivational variables than is self‐esteem, whereas self‐esteem is more highly related to affective variables than is general self‐efficacy, as hypothesized. Furthermore, results support the notion that motivational and affective states differentially mediate the relationships of general self‐efficacy and self‐esteem with task performance. These results confirm the theoretical distinction between general self‐efficacy and self‐esteem and suggest that failure to distinguish between them might exact a price in terms of precision, validity, and understanding of determinants of performance. Implications for research and practice in organizations are discussed. Copyright © 2004 John Wiley & Sons, Ltd. 相似文献
8.
Tal Falick Michaeli Adam Spiro Ofra Sabag Gilad Karavani Simha Yagel Smadar Eventov-Friedman Howard Cedar Yehudit Bergman Yuval Gielchinsky 《黑龙江环境通报》2019,39(11):1005-1010
Gestational age determination by traditional tools (last menstrual period, ultrasonography measurements and Ballard Maturational Assessment in newborns) has major limitations and therefore there is a need to find different approaches. In this study, we looked for a molecular marker that can be used to determine the accurate gestational age of the newborn. To this end, we performed reduced representation bisulfite sequencing (RRBS) on 41 cord blood and matching placenta samples from women between 25 and 40 weeks of gestation and generated an epigenetic clock based on the methylation level at different loci in the genome. We identified a set of 332 differentially methylated regions (DMRs) that undergo demethylation in late gestational age in cord blood cells and can predict the gestational age (r = −.7, P = 2E-05). Once the set of 411 DMRs that undergo de novo methylation in late gestational age was used in combination with the first set, it generated a more accurate clock (R = .77, P = 1.87E-05). We have compared gestational age determined by Ballard score assessment with our epigenetic clock and found high concordance. Taken together, this study demonstrates that DNA methylation can accurately predict gestational age and thus may serve as a good clinical predictor. 相似文献
1