986 resultados para Vituhnovskaa‚, Marina: Rossijskaa‚ Karelia‚ i karely v imperskoj politike Rossii, 1905-1917


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Mode of access: Internet.

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vyp.1. Ot Aleppo do zemli kazakov -- vyp.2. Ot Dni͡estra do Moskvy -- vyp. 4. Moskva, Novgorod i putʹ ot Moskvy do Dni͡estra -- vyp. 5. Obratnyĭ putʹ. Moldavīi͡ia i Valakhīi͡a. Malai͡a Azīi͡a i Sii͡a. Rezulʹtaty puteshestvīi͡a.

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"S prisovokuplenīem tablit︠s︡ sklonenīĭ i spri︠a︡zhenīĭ, zaimstvovannykh iz Grammatiki G. Vostokova, napechatannoĭ v 1832-m godu i vvedennoĭ v upotreblenīe v nizhnikh i srednikh uchebnykh zavedenīi︠a︡kh."

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"Ottisk iz Li︠e︡topisi zani︠a︡tīĭ Arkheograficheskoĭ kommissīi vyp. XII."

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Includes bibliographical references.

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The development of models of marine ecosystems in the Southern Ocean is becoming increasingly important as a means of understanding and managing impacts such as exploitation and climate change. Collating data from disparate sources, and understanding biases or uncertainties inherent in those data, are important first steps for improving ecosystem models. This review focuses on seals that breed in ice habitats of the Southern Ocean (i.e. the crabeater seal, Lobodon carcinophaga; Ross seal, Ommatophoca rossii; leopard seal, Hydrurga leptonyx; and Weddell seal, Leptonychotes weddellii). Data on populations (abundance and trends in abundance), distribution and habitat use (movement, key habitat and environmental features) and foraging (diet) are summarised, and potential biases and uncertainties inherent in those data are identified and discussed. Spatial and temporal gaps in knowledge of the populations, habitats and diet of each species are also identified.

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Adenylyl cyclase (AC) isoforms catalyze the synthesis of 3',5'-cyclic AMP from ATP. These isoforms are critically involved in the regulation of gene transcription, metabolism, and ion channel activity among others. Nitric oxide (NO) is a gaseous product whose synthesis from L-arginine is catalyzed by the enzyme NO synthase. It has been well established that NO activates the enzyme guanylyl cyclase, but little has been reported on the effects of NO on other important second messengers, such as AC. In the present study, the effects of sodium nitroprusside (SNP), a nitric oxide-releasing compound, on COS-7 cells transfected with plasmids containing AC types I, II, V and VI were evaluated. Total inhibition (~98.5%) of cAMP production was observed in COS-7 cells transfected with the AC I isoform and previously treated with SNP (10 mM) for 30 min, when stimulated with ionomycin. A high inhibition (~76%) of cAMP production was also observed in COS-7 cells transfected with the AC VI isoform and previously treated with SNP (10 mM) for 30 min, when stimulated with forskolin. No effect on cAMP production was observed in cells transfected with AC isoforms II and V.

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El medi marí de cap de Creus i golf de Roses té unes característiques ecològiques, geològiques i oceanogràfiques excepcionals que han permès el desenvolupament turístic i pesquer de les viles costaneres adjacents, Aquest article sintetitza els principals valors ecològics i econòmics de l'àmbit marí d'aquests dos espais inclosos dins la candidatura de Patrimoni Mundial de la UNESCO