Results 41 to 50 of about 489,598 (158)
Psicologia: Reflexão e Crítica, 2023 Most children grow up in homes with easy access to multiple screens. Screen use by children between the ages of 0 to 5 has become a worldwide preoccupation.
Caroline Fitzpatrick +5 more
doaj +1 more source
Determination of Au in High Grade Gold Deposits by Flame Atomic Absorption Spectrometry
Yankuang ceshi, 2013 The conventional fire assay method to determine high grade gold has a long chemical procedure with many factors influencing the analysis result. Moreover, the ash blowing process for the Pb button volatilizes a large amount of Pb, causing serious ...
FU Wen-hui +3 more
doaj
Study on Preparation and Au(Ⅲ) Adsorption Ability of Nitric Acid Modified Activated Carbon
Yankuang ceshi, 2014 Activated carbon has been widely used due to its good adsorption performance; however, the adsorption capacity is limited. Activated carbon was modified by ammonium hydrogen fluoride and nitric acid with a series of different concentrations.
GUO Lin-zhong +3 more
doaj +2 more sources
Love Wave Surface Acoustic Wave Sensor with Laser-Deposited Nanoporous Gold Sensitive Layer
Sensors, 2019 Laser-deposited gold immobilization layers with different porosities were incorporated into Love Wave Surface Acoustic Wave sensors (LW-SAWs). Acetylcholinesterase (AChE) enzyme was immobilized onto three gold interfaces with different morphologies, and ...
Cristian Viespe +3 more
doaj +1 more source
Task on Tank model for funding peace operation in Africa – A Southern African perspective
Cogent Social Sciences, 2018 The operations of the Southern African Development Community Standby Force (SADCSF) have been hindered as a result of the agency’s inability to fund peace operation (PO) in the region.
Emeka Austin Ndaguba
doaj +1 more source
UN and Regional Actors in Somalia: A Quest for New Modes of Interaction [PDF]
Ученые записки Института Африки Российской академии наукOver the past decades, the security situation in Somalia has been a matter of global concern. Since 1991, Somalia has remained a virtually fragmented country with de facto no proper governance.
Tishkov Sergey Aleksandrovich +1 more
doaj +1 more source
Photosynthate partitioning and morphoanatomical aspects of photomorphogenic mutants of tomato
Bioscience Journal, 2013 The aim of this study was to analyze photosynthate partitioning in tomato photomorphogenic mutants at the ends of the vegetative (40 days after emergence [DAE]) and reproductive (69 DAE) stages and to determine its interaction with morphoanatomical ...
Hyrandir Cabral de Melo +3 more
doaj
Indonesian Journal of ChemistryThe synthesis of pure TiO2 and X% Au/TiO2 NPs was achieved via a sol-gel technique. The influence of Au concentration on structural, morphological, and optical features, as well as photocatalytic activity, was studied.
Rasha Jameel Neama +4 more
doaj +1 more source
African Regional and Sub-Regional Organisations’ Security Policies: Challenges and Prospects
Akademik İncelemeler Dergisi, 2014 This article will examine peace and security policies and strategies of the African Union (AU), the Intergovernmental Authority for Development (IGAD), the Economic Community Of West African States (ECOWAS), and the Southern African Development Community
Abdurrahim Siradag
doaj
Journal of Pediatric Surgery Case Reports, 2017 In developed countries, surgeons and anesthesiologists approach the mediastinal mass causing airway compression with prudence and trepidation. Resource-limited settings provide unique challenges in the diagnosis and management of patients with critical ...
Katie Clouthier, DO +8 more
doaj +1 more source