Results 71 to 80 of about 238,960 (237)

Comparação de métodos de determinação da capacidade de troca de cátions em solos brasileiros

open access: yes, 2002
Este trabalho teve por objetivo comparar o método de determinação da CTC utilizado pelo Sistema Brasileiro de Classificação dos Solos (soma de cátions) com o adotado pela Soil Taxonomy e FAO (acetato de amônio a pH 7,0) para diferentes classes de solos ...
Costa, Oldair Vinhas   +4 more
core  

RESINAS TROCADORAS DE CÁTIONS NA HIPERCALEMIA AGUDA GRAVE [PDF]

open access: yes, 2014
As resinas trocadoras de cátions fazem parte da abordagem terapêutica tradicional da hipercalemia. As resinas de troca catiônica são substâncias sintéticas, não absorvíveis, que liberam um cátion que faz parte de sua composição e captam outro cátion de ...
Pachaly, Maria Aparecida
core   +1 more source

Crystal structure of tris[(4,7,13,16,21,24-hexaoxa-1,10-diazabicyclo[8.8.8]hexacosane-κ8N2,O6)rubidium] rubidium nonastannide

open access: yesActa Crystallographica Section E: Crystallographic Communications, 2017
The crystal structure of the title compound, [Rb(C18H36N2O6)]3RbSn9, consists of deltahedral [Sn9]4– cluster anions, Rb+ cations and cryptand molecules, which partially sequester the cations. Those cations, which are not coordinated by cryptand molecules,
Wilhelm Klein   +2 more
doaj   +1 more source

UiO‐66 metal–organic frameworks in biomedicine: From structural tunability to bioimaging, photodiagnostics, and photodynamic cancer therapy

open access: yesFEBS Open Bio, EarlyView.
UiO‐66(Zr) metal–organic frameworks are chemically stable, biocompatible, and highly tunable nanomaterials. Their modular structure enables controlled drug delivery, multimodal bioimaging, and light‐activated photodynamic therapy, supporting integrated diagnostic and therapeutic (theranostic) applications in cancer and biomedical research.
Veronika Huntošová   +2 more
wiley   +1 more source

Capacidade de troca de cátions da fração argila em Latossolo amarelo de textura média e muito argilosa. [PDF]

open access: yes, 1996
Foram analisados dados físicos, químicos e mineralógicos de dois Latossolos Amarelos de textura média e dois de textura muito argilosa, localizados entre o km 92 e a cidade de Paragominas na BR 010 (Belém-Brasília), os quais permitiram uma comparação e ...
VALENTE, M. A.   +3 more
core  

Secreção de insulina: interações catiônicas, AMP cíclico e sistema efetor na célula beta

open access: yesSemina: Ciências Sociais e Humanas, 1984
The review initially deals with cationic rearrangements in the beta cell, as part of the insulin secretion process. It considers the modulator participation of the cyclic AMP.
Edson Delattre
doaj   +3 more sources

Analysis of Adsorption, Ion Exchange, Thermodynamic Behaviour of Some Organic Cations on Dowex 50WX4-50/H+ Cation Exchanger in Aqueous Solutions

open access: yesE-Journal of Chemistry, 2011
The equilibrium adsorption, ion exchange characteristics of various concentrations of some organic cations from aqueous solutions onto dowex 50WEX/H+ cation exchanger were studied at different temperatures in the range of 30-50 °C.
Ehteram A. Noor, Fatma M. Al-Solmi
doaj   +1 more source

Molecular characterization of covRS mutations in M1UK Streptococcus pyogenes

open access: yesFEBS Open Bio, EarlyView.
Group A Streptococcus (GAS) acquires covRS mutations driving a hypervirulent bacterial state, frequently associated with invasive disease‐like necrotizing fasciitis. We demonstrate that the newly emerged M1UK GAS lineage can also acquire these mutations.
Jarrad Pritchard   +12 more
wiley   +1 more source

Efeito da adição de diferentes fontes de cálcio no movimento de cátions em colunas de solo Effect of several calcium sources on cation leaching using soil columns

open access: yes, 1993
No estudo realizado em colunas de solo montadas em laboratório, procurou-se avaliar o movimento do cálcio, e de outros cátions, após aplicação de calcário agrícola, gesso, calcário calcinado e uma mistura de calcário agrícola e gesso, comparados com um ...
A.M.L. Neptune   +14 more
core   +1 more source

Driving force for the swelling of montmorillonite as affected by surface charge and exchangeable cations: A molecular dynamic study

open access: yesResults in Physics, 2019
Swelling of montmorillonite (MMT) is a nonnegligible factor in many industrial processes owing to its great ability to absorb water in interlayer space.
Jianfei Peng   +4 more
doaj   +1 more source

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