منابع مشابه
Patterns of Morphological Diversity among and within Arcid Bivalve Species Pairs Separated by the Isthmus of Panama
Geminate species are morphologically similar sister-species found on either side of the Isthmus of Panama. The existence of all geminates in the tropical Eastern Pacific ocean and the Caribbean Sea is most often explained by vicariance: closure of the Central American Seaway 3.1 to 3.5 Ma simultaneously isolated populations of species with amphi-American distributions. In this paper, we test th...
متن کاملDo selenium and glutathione ( GSH ) detoxify mercury in marine invertebrates ? 11 . Effects on gill adenosine triphosphatase and related blood factors in an arcid clam Anadara granosa
Selenium, because of its affinity for SH/SS, thiol group, offers protection against or detoxifies mercury in marine vertebrates. This study explores the possibility of a similar effect for a marine invertebrate. Arcid blood clams Anadara granosa (L.) with erythrocytic haemoglob~n were exposed to sublethal concentrations of ~ g ' + (0.1 mg I-', as HgCI2), Se4+ (1.0 mg I' , SeO?) and reduced glut...
متن کاملAlzheimer’s Disease, Cerebrovascular Disease and Dementia: Pathology, Risk Factors and Prevention; A Comprehensive Approach
Alzheimer’s disease (AD) and cerebrovascular disease (CVD) frequently co-exist. CVD may precede and act additionally and synergistically with AD in aging-related cognitive impairment and dementia (ARCID) resulting in “mixed dementia”. The incidence of ARCID may be decreased by the prevention and treatment of cardiovascular disease. ARCID is increased by adverse psycho-social factors and the inc...
متن کاملon semihypergroups and hypergroups
in this thesis, first the notion of weak mutual associativity (w.m.a.) and the necessary and sufficient condition for a $(l,gamma)$-associated hypersemigroup $(h, ast)$ derived from some family of $lesssim$-preordered semigroups to be a hypergroup, are given. second, by proving the fact that the concrete categories, semihypergroups and hypergroups have not free objects we will introduce t...
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ژورنال
عنوان ژورنال: Proceedings of the Geologists' Association
سال: 1888
ISSN: 0016-7878
DOI: 10.1016/s0016-7878(88)80046-4