نتایج جستجو برای: hydrophobic polytetrafluoroethylene membrane

تعداد نتایج: 417549  

Journal: :Virology 1999
T Betakova E J Wolffe B Moss

The formation of a lipoprotein membrane within specialized areas of the cytoplasm is the first visible step in poxvirus morphogenesis. The A17L viral protein, an essential nonglycosylated membrane component, was predicted to have four centrally located alpha-helical membrane-spanning domains. The gene was expressed as a 23-kDa protein in a cell-free transcription/translation system containing c...

Journal: :journal of dental biomaterials 0
s. raoofi department of periodontology, school of dentistry, shiraz university of medical sciences, shiraz, iran s. sabagh department of periodontology, school of dentistry, shiraz university of medical sciences, shiraz, iran mr. shabahangfar department of periodontology, school of dentistry, shiraz university of medical sciences, shiraz, iran gh. mozafari department of periodontology, school of dentistry, shiraz university of medical sciences, shiraz, iran m. ghoraishiabhari department of endodontics, school of dentistry, shiraz university of medical sciences, shiraz, iran

statement of problem: there are limited histomorphometric studies on biologic efficacy of high density tetrafluoroethylen (d-ptfe) membrane. objectives: to investigate the healing of surgically induced grade ii furcation defects in dogs following the use of dense polytetrafluoroethylene as the barrier membrane and to compare the results with the contra lateral control teeth without the applicat...

The extraction of Terbium (III)from aqueous nitrate solutions with a supported liquid membrane was investigated using a mixture of di-(2-ethylhexyl phosphoric acid (D2EHPA) and tri-octyl phosphine oxide (TOPO) with a molar ratio 1/0.4. The Hydrophobic Polyvinylidene Fluoride (PVDF) membrane was used as solid support. The sorption process followed pseudo-second-o...

Journal: :Neurologia medico-chirurgica 2006
Shigeru Miyake Atsushi Fujita Hideo Aihara Eiji Kohmura

A new technique for decompressive craniectomy with duraplasty was developed for cases in which brain swelling was present at dural closure. Expanded polytetrafluoroethylene (ePTFE) membrane is placed under the dura, covering the brain surface, without the use of sutures. The dura is then loosely sutured. The procedure was used in 13 patients. No leakage of cerebrospinal fluid into the epidural ...

Journal: :The International journal of oral & maxillofacial implants 2000
R Cornelini F Cangini U Covani S Andreana

The present report demonstrates a clinical approach to achieve vertical ridge augmentation around endosseous implants. Two implants were placed, leaving the threads exposed, in the atrophic mandibular right posterior quadrant of a male patient. Both implants were covered with a titanium-reinforced expanded polytetrafluoroethylene (e-PTFE) membrane. Second-stage surgery was performed 12 months a...

Journal: :Journal of heat transfer 2021

Abstract Boiling heat transfer suffers deteriorations under subatmospheric conditions, which can be attributed to a shortage of viable nucleation sites at declining pressures. In this work, the possibility enhancing low-pressure saturated boiling water using combination wettability patterning and structural modifications was experimentally explored. The copper test surface, comprised an array c...

Journal: :Journal of Industrial and Engineering Chemistry 2023

This paper presents as main contribution the combination of membrane osmotic distillation (OD) to dealcoholize red wine with hydrophobic-hydrophilic pervaporation (PV) carried out add value wastewater (extracting water) produced in OD, recycling water and generating bioethanol. Membrane OD a commercial polypropylene hollow fiber module was applied partially from 14.0 11.0 v/v% ethanol. The extr...

Journal: :Chemistry 2023

In recent decades, membrane-based processes have been extensively applied to a wide range of industrial processes, including gas separation, food industry, drug purification, and wastewater treatment. Membrane distillation is thermally driven separation process, in which only vapour molecules transfer through microporous hydrophobic membrane. At the operational level, performance membrane negat...

Journal: :The Journal of Cell Biology 1989
M T Haeuptle N Flint N M Gough B Dobberstein

Multilineage colony stimulating factor is a secretory protein with a cleavable signal sequence that is unusually long and hydrophobic. Using molecular cloning techniques we exchanged sequences NH2- or COOH-terminally flanking the hydrophobic signal sequence. Such modified fusion proteins still inserted into the membrane but their signal sequence was not cleaved. Instead the proteins were now an...

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