Results 41 to 50 of about 103,389 (181)

Desenvolvimento de métodos simples e rápidos para determinação de mercúrio total e inorgânico em amostras biólogicas por espectrometria de absorção atômica com vapor frio [PDF]

, 2009
Dissertação (mestrado) - Universidade Federal de Santa Catarina, Centro de Ciências Físicas e Matemáticas. Programa de Pós-Graduação em Química.Foram desenvolvidos três procedimentos simples e confiáveis a fim de reduzir o tempo de preparo da amostra ...
Torres, Daiane Placido
core  

Two-step Fabrication of Large Area SiO2/Si Membranes

Medžiagotyra, 2012
Two-step fabrication technique of SiO2/Si membrane combining the deep local etching of double side polished and thermally oxidized silicon <100> wafer in tetramethylammonium hydroxide (TMAH) water solution and SF6/O2 reactive ion etching is ...
Viktoras GRIGALIŪNAS, Brigita ABAKEVIČIENĖ, Ignas GRYBAS, Angelė GUDONYTĖ, Vitoldas KOPUSTINSKAS, Darius VIRŽONIS, Ramūnas NAUJOKAITIS, Sigitas TAMULEVIČIUS   +7 more
doaj   +1 more source

Optimization of Mesa Etch for a Quasi-Vertical GaN Schottky Barrier Diode (SBD) by Inductively Coupled Plasma (ICP) and Device Characteristics

Nanomaterials, 2020
The optimization of mesa etch for a quasi-vertical gallium nitride (GaN) Schottky barrier diode (SBD) by inductively coupled plasma (ICP) etching was comprehensively investigated in this work, including selection of the etching mask, ICP power, radio ...
Yue Sun, Xuanwu Kang, Yingkui Zheng, Ke Wei, Pengfei Li, Wenbo Wang, Xinyu Liu, Guoqi Zhang   +7 more
doaj   +1 more source

Foraminifera Iodine to Calcium Ratios: Approach and Cleaning

Geochemistry, Geophysics, Geosystems, 2021
Planktic and benthic foraminiferal iodine (I) to calcium (Ca) molar ratios have been proposed as an exciting new proxy to assess subsurface and bottom water oxygenation in the past.
Helge Winkelbauer, Kathy Cordova‐Rodriguez, Dharma Reyes‐Macaya, Jennifer Scott, Nicolaas Glock, Zunli Lu, Elliott Hamilton, Simon Chenery, Phil Holdship, Charlotte Dormon, Babette Hoogakker   +10 more
doaj   +1 more source

Single‐Step Analog In‐Memory Matrix Computation in Three‐Dimensional Circuits

Advanced Intelligent Systems, EarlyView.
A wooden model illustrates a 3D memristive array designed for single‐step kernel convolutions. It shows how two‐dimensional input data are mapped into the 3D array and convolved in parallel with stored kernels. Color‐coded connection points represent programmed memory‐element values, with each color corresponding to a specific kernel weight.
Alireza Jaberi Rad, Koushik Kumar, Fatemeh Kiani, Yi Huang, Ali Abdel‐Maksoud, Zheshun Xiong, Yunzhi Ling, Wuyu Zhao, Qiangfei Xia   +8 more
wiley   +1 more source

Facile synthesis of C, N-TiO2 nanorods via layered -TMAH interlaminar bonding interaction and their enhanced catalytic performance

Materials Research Express, 2020
A green and efficient photocatalyst based on C and N co-doped titanium based nanorods (NRs) was prepared by facile hydrothermal synthesis and interlaminar bonding interaction between layered ${{\rm{Ti}}}_{3}{{{\rm{O}}}_{7}}^{2-}$ and tetramethylammonium ...
Ruikai Wang, Xiuqiang Ma, Kun Hao, Liang Song, Tong Liu, Pengfei Dai, Yuchao Li, Sie Chin Tjong, Qing Yu, Zhongwei Wang   +9 more
doaj   +1 more source

Kinetic Study of Aerobic Degradation of Tetramethylammonium Hydroxide (Tmah) Waste Produced in Electronic Industries

DEStech Transactions on Environment, Energy and Earth Sciences, 2017
Tetramethylammonium hydroxide is used in the electronic industry during the photolithography process to produce memories. The effluent produced in this process must be treated before discharging due its toxicity. The aim of this research is to evaluate the feasibility of biological treatment to remove this molecule from the effluent by aerobic process ...
Ida DE MICHELIS, DI RENZO, ALESSIA, SARAULLO, MATTEO, Francesco VEGLIO   +3 more
openaire   +3 more sources

Wood‐Derived 3D Conductive Cellular Bio‐C@YB2C2 Ceramics for Efficient Electromagnetic Shielding and Joule Heating

Electron, EarlyView.
Herein, a biomimetic, anisotropic, robust wood‐derived 3D conductive Bio‐C@YB2C2 framework was synthesized by in situ boron/carbon thermal reduction reaction on the carbonized wood template. The as‐obtained Bio‐C@YB2C2 composites accurately inherit the specific microstructure of natural wood, providing pathways for terahertz wave dissipation.
Yong‐Mei Hou, Yi Ren, Xu Hao, Han Jia, Xiao‐Nan Zhou, Zhi‐Lei Wei, Zhong‐Qi Shi, Jian‐Feng Yang, Bo Wang, Suo‐Cheng Song   +9 more
wiley   +1 more source

Synthesis and Characterization of Magnetite/Gold Core Shell Nanoparticles Stabilized with a β-Cyclodextrin Nanosponge to Develop a Magneto-Plasmonic System

Magnetochemistry, 2023
Magnetite/gold core-shell nanoparticles (magnetite/gold NPs) have important optical and magnetic properties that provide potential for applications, especially biomedical ones. However, their preparation is not exempt from difficulties that might lead to
Sebastián Salazar Sandoval, Daniel Santibáñez, Ana Riveros, Fabián Araneda, Tamara Bruna, Nataly Silva, Nicolás Yutronic, Marcelo J. Kogan, Paul Jara   +8 more
doaj   +1 more source

Organic Matter Quality and Microbial Activity in Soils Managed With Brachiaria Succession

Journal of Plant Nutrition and Soil Science, EarlyView.
ABSTRACT Background Although succession systems and brachiaria improve soil quality, gaps remain in microbial community dynamics, activity, and soil organic matter stocks. Methods The objective was to evaluate the carbon (C) and nitrogen (N) stocks of soil organic matter fractions and their distribution, molecular characterization, enzyme activity ...
Siro Paulo Moreira, Vanessa Maria de Souza Barros, David Gabriel Campos Pereira, Humberto Josué de Oliveira Ramos, Eric Batista Ferreira, Teogenes Senna de Oliveira   +5 more
wiley   +1 more source