Results 31 to 40 of about 147,971 (213)

Optimizing the time of incubation of an anion exchange membrane inserted into the soil to use in studies of monitoring soil nitrate levels [PDF]

open access: yes, 2010
Ann anion exchange membrane (AEM) is a solid organic polymer that has a positive electrostatic charge, which is saturated by the addition of a counter ion, such as bicarbonate (HCO3), before use.
Arrobas, Margarida, Rodrigues, M.A.
core  

Benefits and complications of fetal and postnatal surgery for open spina bifida: systematic review and proportional meta‐analysis

open access: yesUltrasound in Obstetrics &Gynecology, Volume 66, Issue 2, Page 135-146, August 2025.
ABSTRACT Objective To derive pooled estimates of maternal, fetal and pediatric outcomes up to the age of 30 months in patients undergoing pre‐ or postnatal surgery for open spina bifida (OSB). Methods A systematic search was conducted in MEDLINE, PubMed (non‐MEDLINE records), Embase, Web of Science, ClinicalTrials.gov, Cochrane Central Register of ...
Y. Kunpalin   +10 more
wiley   +1 more source

Estudio comparativo en cirugía perirradicular entre la técnica convencional y técnicas para la regeneración ósea

open access: yesRevista Facultad de Odontología Universidad de Antioquia, 2000
It was intended to demonstrate the ellicacy 01 two materials 01 bone regeneration as assisting towerds therapy in periradicular surgery and their effect on the healing 01periapical tissues. Twenty eight petients (30 surgical sites).
Sergio Tobón   +4 more
doaj  

Processos de separação com membranas na reciclagem e tratamento de efluentes da indústria têxtil [PDF]

open access: yes, 2004
Numa era em que a destruição de determinados recursos naturais começa a se constituir numa ameaça e em que o desenvolvimento sustentável é a palavra de ordem, a implantação de tecnologias mais limpas e o tratamento das águas residuais tornou-se um dos ...
Amorim, M. T. Pessoa de
core  

The Concept of Neuroglia ‐ the State of the Art Circa 1900

open access: yesGlia, Volume 73, Issue 5, Page 890-904, May 2025.
Main Points Retzius, Lenhossek, Weigert, Held illuminate glial research circa 1900. English translations provided. They analyze glia during vertebrate evolution, including human, and relate it to development. They compare grey and white matter, glial relationships to vessels, brain surface.
Helmut Kettenmann   +3 more
wiley   +1 more source

Avaliação das propriedades de barreira de membranas obtidas a partir de dispersões aquosas à base de poliuretanos e argila

open access: yesPolímeros, 2014
Formulações de aplicação não-poluente à base de poliuretanos em dispersão aquosa (WPUs), com adição de argila montmorilonita hidrofílica (CWPUs), foram sintetizadas.
Elaine M. Barboza   +3 more
doaj   +1 more source

Development of a Capsule Phase Microextraction Protocol for the Determination of Monomers Released from Dental Resins in Cola Drinks Analyzed by High‐Pressure Liquid Chromatography Coupled to UV

open access: yesJournal of Separation Science, Volume 48, Issue 5, May 2025.
ABSTRACT A novel, simple capsule phase microextraction combined with high‐pressure liquid chromatography coupled with ultraviolet detection analytical method was developed for the simultaneous determination of organic monomers that can be released from dental resins [bisphenol‐A (BPA), bisphenol A glycerolatedimethacrylate (Bis‐GMA), triethylene glycol
Magdalini Vladitsi   +5 more
wiley   +1 more source

Síntesis y caracterización de membranas híbridas a partir de quitosan, polivinil alcohol y sílice para su aplicación en deshidratación de gases

open access: yesIteckne, 2015
Los sistemas de membranas son una tecnología atractiva aplicada a procesos de separación. Por décadas se ha estudiado la síntesis y caracterización de sus propiedades enfocadas al desarrollo de sistemas de membrana eficientes y competitivos.
Martha Isabel Gutiérrez-Gutiérrez   +3 more
doaj   +1 more source

Sistema para la medición del estado de tensiones en membranas textiles [PDF]

open access: yes, 2005
Las membranas textiles son estructuras tesadas que funcionan por geometría. La forma que adopta la membrana depende del tesado y de los apoyos fijos, cables tensores, etc.
Carreira Valiño, Leonardo
core  

Unveiling Unidirectional Transport within Janus Membranes

open access: yesSmall Structures, Volume 6, Issue 4, April 2025.
GA: A three‐stage model is proposed to describe unidirectional transport through Janus membranes, encompassing liquid intrusion, capillary wetting, and liquid transport. The mechanisms of liquid intrusion include direct‐contact‐driven intrusion in bilayer structures and surface‐energy‐driven intrusion in gradient structures.
Kai Li   +5 more
wiley   +1 more source

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