Results 101 to 110 of about 60,368 (301)

Determinação de mercúrio em águas sanitárias comercializadas em região do sudeste do Brasil

Revista de Saúde Pública
Para determinação de mercúrio presente como contaminante nas águas sanitárias usadas para desinfecção de água e alimentos, foi proposto um tratamento de amostra com ácido clorídrico para eliminação do cloro.
Odair Zenebon, Franca Durante de Maio, Alice M. Sakuma, Eliani Rosa   +3 more
doaj  

Influência das características físico-químicas e composição elementar nas cores de méis produzidos por Apis mellifera no sudoeste da Bahia utilizando análise multivariada Influence of physicochemical and elemental composition on honey colors produced by Apis mellifera in southwest Bahia using multivariate analysis

Química Nova, 2010
In this study honey samples produced in the southwest of Bahia were characterized based on physicochemical and mineral (Ca, Mg, Na, K, Mn, Fe and Zn) composition. The metals were determined by atomic absorption spectrophotometry.
Julian Júnio de Jesus Lacerda, José Soares dos Santos, Shaiala Aquino dos Santos, Gisele Brito Rodrigues, Maria Lúcia Pires dos Santos   +4 more
doaj   +1 more source

Outflow in Overlooked Luminous Quasar: Subaru Observations of AKARI J1757+5907

, 2011
We present Subaru observations of the newly discovered luminous quasar AKARI J1757+5907, which shows an absorption outflow in its spectrum. The absorption consists of 9 distinct troughs, and our analysis focuses on the troughs at ~ -1000$ km s^{-1} for ...
Aoki, Kentaro, Arav, Nahum, Dunn, Jay P., Edmonds, Doug, Korista, Kirk T., Matsuhara, Hideo, Oyabu, Shinki, Toba, Yoshiki   +7 more
core   +1 more source

Studies on Atomic-absorption Spectrophotometry. II. Determination of Magnesium in Cast Iron by Atomic-absorption Spectrophotometry

The Journal of the Society of Chemical Industry, Japan, 1963
原子吸収分光光度法による鋳鉄中のマグネシウムの定量について鉄を除去した場合に必要な基礎的研究を行ない定量方法を確立した。マグネシウムを定量する場合,アルミニウムおよびケイ素は影響を与えるが,カルシウムの添加によってその影響は消失した。チタンは全く影響を示さなかった。クロムは3価として存在すれば影響しなかった。重クロム酸として存在するとマグネシウムの吸光度は増大するが,その割合はクロム量が増加しても一定であった。リンは空気-アセチレン炎では影響はあらわれなかったが,空気-プロパン炎の場合にはあらわれた。鋳鉄中のマグネシウムは試料溶液からメチルイソブチルケトン抽出で鉄を除去し,原子吸収分光光度法で定量する。この方法は操作が簡易迅速で結果も良好であった。
Masami Suzuki, Tsugio Takeuchi
openaire   +2 more sources

Speciation and determination of mercury by various analytical techniques

Reviews in Analytical Chemistry, 2013
Mercury is one of the most important metals to environmental researchers due to its toxicity. In recent years, many authors determined the concentration of mercury and its different forms in the environment, such as soil, water, atmosphere and biota ...
Suvarapu Lakshmi Narayana, Seo Young-Kyo, Baek Sung-Ok   +2 more
doaj   +1 more source

Recent Microextraction Techniques for Determination and Chemical Speciation of Selenium

Open Chemistry, 2017
Research designed to improve extraction has led to the development of microextraction techniques (ME), which involve simple, low cost, and effective preconcentrationof analytes in various matrices.
Ibrahim Ahmed S. A., Al-Farawati Radwan, Hawas Usama, Shaban Yasser   +3 more
doaj   +1 more source

Bridging Model and Observed Stellar Spectra

, 2010
Accurate model stellar fluxes are key for the analysis of observations of individual stars or stellar populations. Model spectra differ from real stellar spectra due to limitations of the input physical data and adopted simplifications, but can be ...
Allende Prieto, Allende Prieto, Allende Prieto, Allende Prieto, Asplund, Bautista, Bohlin, Bohlin, Bohlin, Bruzual, C. Allende Prieto, Castelli, Cenarro, Cenarro, Coelho, Colina, Cunto, Fitzpatrick, García-Gil, González Delgado, Gregg, Irwin, Koesterke, Koesterke, Le Borgne, Mermilliod, Nahar, Ramírez, Schiavon, Stix, Sánchez-Blázquez, Tsuji, Tsuji, Vazdekis   +33 more
core   +1 more source

Parathyroid hormone-related peptide stimulates intestinal strontium absorption in Camels (Camelus dromedarius) [PDF]

, 2008
The present work was undertaken to evaluate the stimulatory effect of Parathyroid hormone-related peptide (PTHrP) on the intestinal calcium (Ca) absorption using stable strontium (Sr) as a surgoate marker in 10 Camels.
Coxam, Véronique, Davicco, Marie Jeanne, El Abbadi, Najia, El Khasmi, Mohammed, Farh, Mohamed, Faye, Bernard, Riad, Fouad, Safwate, Abdallah   +7 more
core  

Effect of Binder on Physical Properties of Extruded Activated Carbon and Its Application to Levofloxacin Adsorption

Asia-Pacific Journal of Chemical Engineering, EarlyView.
ABSTRACT Bamboo charcoal–based extruded activated carbons were prepared via molding, pre‐oxidation, carbonization, and steam activation, with coal tar, phenolic resin, and their mixtures employed as binders based on practical availability and technical feasibility. This study focused on the regulatory effects of binders on the mechanical properties and
Huitao Jiang, Songlin Zuo
wiley   +1 more source

Analysis of Mercurial Preservatives in Different Vaccines by Cold Vapor Atomic Absorption Spectrophotometry

Journal of Analytical Science and Technology, 2012
Vaccines with low concentration of mercurial preservatives, such as thiomersal, are in use in Albania. A simple and a sensitive method by using CVAAS method for the determination of mercury in vaccine samples is described.
Pranvera Lazo, Merita Kucuku
doaj