13 research outputs found
Palaeoenvironmental control on distribution of crinoids in the Bathonian (Middle Jurassic) of England and France
Bulk sampling of a number of different marine and marginal marine lithofacies in the British Bathonian has allowed us to assess the palaeoenvironmental distribution of crinoids for the first time. Although remains are largely fragmentary, many species have been identified by comparison with articulated specimens from elsewhere, whilst the large and unbiased sample sizes allowed assessment of relative proportions of different taxa. Results indicate that distribution of crinoids well corresponds to particular facies. Ossicles of Chariocrinus and Balanocrinus dominate in deeper-water and lower-energy facies,with the former extending further into shallower-water facies than the latter. Isocrinus dominates in shallower water carbonate facies, accompanied by rarer comatulids, and was also present in the more marine parts of lagoons. Pentacrinites remains are abundant in very high-energy oolite shoal lithofacies. The presence of millericrinids within one, partly allochthonous lithofacies suggests the presence of an otherwise unknown hard substrate from which they have been transported. These results are compared to crinoid assemblages from other Mesozoic localities, and it is evident that the same morphological ad-aptations are present within crinoids from similar lithofacies throughout the Jurassic and Early Cretaceous
Analysis of Polyadenylate · Protein Complex of Polysomal Messenger RNA from Mouse L Cells
Effects of increasing numbers of phagocytic inclusions on human retinal pigment epithelial cells in culture: a model for aging.
Effects of streptozotocin in vitro on proinsulin biosynthesis, insulin release and ATP content of isolated rat islets of Langerhans
Family involvement and helping behaviour in teams
Helping behavior at work has become increasingly important, with organizations making more
and more use of cooperative work practices. The difficulty is that employees are facing growing
demands beyond the workplace. This study investigates the mechanisms by which family
involvement (family structure, family tasks, family support) affects helping behavior in teams.
Based on a sample of 495 team members, the results show that having a supportive partner and
performing care tasks increase helping behavior via enhanced fulfillment and skills. Having
young children is directly and negatively related to helping behavior. The authors also conducted
separate analyses for men and women.