نتایج جستجو برای: encrustation

تعداد نتایج: 233  

Journal: :Journal of Vascular and Interventional Radiology 2021

The purpose of this study is to evaluate our institutional outcomes for percutaneous nephrostomy tube placement in pregnant patients, including potential complications that require early exchange. Our standard routine exchanges non-pregnant patients 6 weeks. This aims define a time interval patients. A retrospective chart and imaging review was conducted 51 who received between January 1, 2012,...

Journal: :Journal of Paleontology 2021

Abstract In this study, a new assemblage of Ediacaran metazoan fossils is reported from the basal Stáhpogieddi Formation on Digermulen Peninsula Arctic Norway, including Anulitubus n. gen. Moczyd?owska in et al., formosus sp. Coniculus elegantis Fistula and crenulata al. The specimens are three-dimensionally preserved include tubular conical skeletons that morphologically distinguished by their...

Journal: :Continence 2022

We hypothesised that raising the abdominal pressure could provide a non-manual approach to opening urinary valve, with potential application for indwelling catheters or an intraurethral device. The ‘Vysera’ valve remains closed during short high amplitude spikes but opens when pre-defined low-amplitude is maintained pre-specified duration, allowing sustained straining achieve voluntary opening....

2004
Eric E. Roden Dmitri Sobolev Brian Glazer George W. Luther

Recent studies of bacterial Fe(II) oxidation at circumneutral pH by a newly-isolated lithotrophic β-Proteobacterium (strain TW2) are reviewed in relation to a conceptual model that accounts for the influence of biogenic Fe(III)-binding ligands on patterns of Fe(II) oxidation and Fe(III) oxide deposition in opposing gradients of Fe(II) and O2. The conceptual model envisions complexation of Fe(II...

Journal: :Minerals 2023

The formation of oxalates in soils and rocks under conditions cryoarid climate, permafrost taiga vegetation was studied. Whewellite weddellite were found four areas associated with the mining industry: on kimberlite deposit Daldyn territory, lower reaches Markha River Central Yakut Plain, coastal outcrop Allah-Yun Sellah-Khotun ore cluster. upper organic horizon Skeletic Cryosol (Thixotropic) (...

2006
ROWAN LOCKWOOD LAUREN A. WORK

This study focuses on two main questions: (1) what types of shell damage occur in the death assemblage of upper Chesapeake Bay benthic mollusks; and (2) how does shell damage differ according to intrinsic factors such as life habit, shell mineralogy, and shell organic content. Extrinsic and intrinsic factors, ranging from the environment to shell composition, interact to influence the quality o...

Journal: :Astrobiology 2008
Beda A Hofmann Jack D Farmer Friedhelm von Blanckenburg Anthony E Fallick

The fossil record of the subsurface biosphere is sparse. Results obtained on subsurface filamentous fabrics (SFF) from >225 paleosubsurface sites in volcanics, oxidized ores, and paleokarst of subrecent to Proterozoic age are presented. SFF are mineral encrustations on filamentous or fibrous substrates that formed in subsurface environments. SFF occur in association with low-temperature aqueous...

Journal: :Applied and environmental microbiology 2011
Anirban Chakraborty Eric E Roden Jürgen Schieber Flynn Picardal

Microbial nitrate-dependent, Fe(II) oxidation (NDFO) is a ubiquitous biogeochemical process in anoxic sediments. Since most microorganisms that can oxidize Fe(II) with nitrate require an additional organic substrate for growth or sustained Fe(II) oxidation, the energetic benefits of NDFO are unclear. The process may also be self-limiting in batch cultures due to formation of Fe-oxide cell encru...

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