Natural gas hydrate deposits are found in deep offshore environments. In some cases these deposits overlay conventional oil and gas reservoirs. There are concerns that the presence of hydrates can compromise the safety of exploration and production operations [Hovland and Gudmestad, 2001]. Serious problems related to the instability of wellbores drilled through hydrate formations have been docu...

Zinc (Zn) is abundantly enriched in sub-retinal pigment epithelial (RPE) deposits, the hallmarks of age-related macular degeneration (AMD), and is thought to play a role in the formation of these deposits. However, it is not known whether Zn is the only metal relevant for sub-RPE deposit formation. Because of their involvement in the pathogenesis of AMD, we determined the concentration and dist...

Purpose To explore the association between presence of subretinal drusenoid deposits (SDD) at baseline in eyes with neovascular age-related macular degeneration (nAMD) with the development of macular atrophy (MA) during anti-vascular endothelial growth factor (VEGF) therapy. Methods There were 74 eyes without pre-existing MA receiving anti-VEGF therapy for nAMD for 2 years or longer analyzed....

introduction two main principal aspects for the genesis of porphyry copper deposits have been determined. the first genetic model concerns the petrologic and geochemical processes and the other relates the genesis to crustal deformation and geodynamic conditions (kesler, 1997). recent studies (e.g., padilla garza et al., 2001) show that the generation and emplacement of porphyry copper deposits...

Although numerous pathologies are associated with abnormal skin deposits, these remain poorly described, as accurate characterization continues to present a challenge for dermatologists. Their submicrometer size well their diverse chemistry require various tools. We aim exemplify of endogenous and exogenous deposits in some selected diseases using different physico-chemical techniques. begin pr...

PAGE Introduction 209 Construction of the spraying tower ... ... ... ... ... ... 210 Adjustment of the atomiser ... ... ... ... ... ... ... 211 Spraying procedure ... ... ... ... ... ... ... ... ... 211 Determination of weight of deposit ... ... ... ... ... ... 212 Replication and distribution of deposits ... ... ... ... ... ... 213 Factors governing the weight of deposit ... ... ... ... ... .....

A radiocarbon date of 19 100 ±100 yr BP (SUA 2856) dates the maximum extent ofglacier ice at Lake Beatrice in the upper Dante IJ ,,,,,,I,,>r 1'1 •• ... nrlrrh", Late Wisconsin in western Tasmania. Study ofthe Dante Glacier outwash fan deposits shows that rna'l:'Or'\'vlT(~'r"hr',e'; a lDalaec~soJ and an older outwash formation, and are interstratified with fluvial silts detritus deposited of the...

Mapping in the Homs region of Syria has revealed a hitherto unrecognized staircase of at least 12 gravel terraces of the upper Orontes River. The terrace gravels overlie Pliocene lacustrine marl and have been calcareously cemented into conglomerates, sometimes interbedded with cemented fine-grained alluvium. A tentative dating scheme, based on modelling the regional-scale surface uplift that ha...

This paper argues that banks must be sufficiently levered to have first-best incentives to make new risky loans. This result, which is at odds with the notion that leverage invariably leads to excessive risk taking, derives from two key premises that focus squarely on the role of banks as informed lenders. First, banks finance projects that they do not own, which implies that they cannot extrac...