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41.
Dolenec T Lojen S Lambasa Z Dolenec M 《Isotopes in environmental and health studies》2006,42(1):77-85
Analyses of nitrogen stable isotopes in the marine sea grass Posidonia oceanica were used to investigate the influence of fish farming on the coastal ecosystem of Vrgada Island in the Murter Sea, Central Adriatic. The results show a statistically significant 15N enrichment (up to 4.7 per thousand at p < 0.005) in P. oceanica leaf and shoot tissues from fish cage sites with respect to the unaffected offshore reference site of Lumbarda Reef Flat (Kornati Islands). Heavy nitrogen enrichment was also detected in other benthic organisms analysed during this study and is attributed to the absorption and assimilation of 15N-enriched fish farm derived nitrogen waste. 相似文献
42.
Konc J Cesnik T Konc JT Penca M Janežič D 《Journal of chemical information and modeling》2012,52(2):604-612
ProBiS-Database is a searchable repository of precalculated local structural alignments in proteins detected by the ProBiS algorithm in the Protein Data Bank. Identification of functionally important binding regions of the protein is facilitated by structural similarity scores mapped to the query protein structure. PDB structures that have been aligned with a query protein may be rapidly retrieved from the ProBiS-Database, which is thus able to generate hypotheses concerning the roles of uncharacterized proteins. Presented with uncharacterized protein structure, ProBiS-Database can discern relationships between such a query protein and other better known proteins in the PDB. Fast access and a user-friendly graphical interface promote easy exploration of this database of over 420 million local structural alignments. The ProBiS-Database is updated weekly and is freely available online at http://probis.cmm.ki.si/database. 相似文献
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44.
Path and path deviation equations for neutral, charged, spinning and spinning charged test particles, using a modified Bazanski
Lagrangian, are derived. We extend this approach to strings and branes. We show how the Bazanski Lagrangian for charged point
particles and charged branes arises à la Kaluza-Klein from the Bazanski Lagrangian in 5-dimensions. 相似文献
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48.
Martin Danko Matej Mičušík Mária Omastová Juraj Bujdák Dušan Chorvát Jr. 《Chemical Papers》2014,68(11):1621-1622
49.
Matej Brešar 《Archiv der Mathematik》1994,63(1):56-59
Supported in part by a grant from the Ministry of Science of Slovenia. 相似文献
50.
Tomáš Malatinský Zsófia Puhová Matej Babjak Jana Doháňošová Ján Moncol Štefan Marchalín Róbert Fischer 《Tetrahedron letters》2018,59(43):3867-3871
Two new five-membered cyclic d-talo-configured nitrones were synthesized from d-mannose, and examined in 1,3-dipolar cycloadditions with vinyl acetate and vinylene carbonate. The stereoselectivity of the cycloadditions depends greatly on the protecting group of the vicinal diol attached to the nitrone C-5 carbon atom. Methyl protection resulted in limited syn/anti-selectivity, giving mixtures of the two isomeric exo-syn and exo-anti isoxazolidines in comparable amounts. On the other hand, the cyclohexylidene-substituted nitrone reacted more selectively in favour of the syn isomer. The difference in the diastereoselectivity was attributed to the specific spatial orientation of the nitrone C-5 substituent. 相似文献