Results 41 to 50 of about 115,189 (308)

Hydrologic controls on seasonal and inter-annual variability of Congo River particulate organic matter source and reservoir age [PDF]

, 2017
We present dissolved organic carbon (DOC) concentrations, particulate organic matter (POM) composition (δ13C, δ15N, ∆14C, N/C), and particulate glycerol dialkyl glycerol tetraether (GDGT) distributions from a 34-month time-series near the mouth of the ...
Dinga, Bienvenu Jean, Eglinton, Timothy I., Galy, Valier V., Hemingway, Jordon D., McIntyre, Cameron, Schefuß, Enno, Spencer, Robert G.M.   +6 more
core   +1 more source

Papermaking properties of tropical wood pulp

Известия СПбЛТА, 2020
В работе рассмотрены структурно-морфологические и бумагообразующие свойства целлюлозы, полученной сульфатным способом из древесины тропических пород – Bambusa blumeana и акация Acacia hybrid, местом произрастания которых является Вьетнам. Выполнено сравнение со свойствами целлюлозы из древесины традиционных северных лиственных (смесь березы и осины 50 ...
openaire   +1 more source

Do outgrower schemes enhance technology adoption and productivity? Evidence from maize farmers in Northern Ghana

Agribusiness, EarlyView.
Abstract Nucleus outgrower schemes are contractual arrangements where well‐resourced large‐scale farmers (nucleus farmers) are empowered by development support agencies to take charge of smallholder farmers, by providing them with market access and the necessary training on agronomic practices and farm inputs for production.
Dominic Tasila Konja, Awudu Abdulai
wiley   +1 more source

Chemical characterization of Handroanthus vellosoi wood. Caracterização química da madeira de Handroanthus vellosoi. [PDF]

Revista do Instituto Florestal, 2012
The main chemical components of wood are cellulose, hemicellulose, lignin and extractives. Knowledge of these components content enables to understand how the wood will behave as a raw material in its many uses.
Ivanka Rosada de OLIVEIRA, Vagner Roberto BOTARO;, Mônica Aparecida de ALMEIDA, Eduardo Luiz LONGUI, Israel Luiz de LIMA, Sandra Monteiro Borges FLORSHEIM, Antonio Carlos Scatena ZANATTO   +6 more
doaj  

CHEMICAL CHARACTERIZATION OF Handroanthus vellosoi WOOD

Revista do Instituto Florestal, 2012
The main chemical components of wood are cellulose, hemicellulose, lignin and extractives. Knowledge of these components content enables to understand how the wood will behave as a raw material in its many uses. The aim of this research was to determine
Ivanka Rosada de Oliveira, Vagner Roberto Botaro, Mônica Aparecida de Almeida, Eduardo Luiz Longui, Israel Luiz de Lima, Sandra Monteiro Borges Florsheim, Antonio Carlos Scatena Zanatto   +6 more
doaj   +1 more source

Machine Learning‐Assisted Infectious Disease Detection in Low‐Income Areas: Toward Rapid Triage of Dengue and Zika Virus Using Open‐Source Hardware

Advanced Intelligent Discovery, EarlyView.
This study introduces an affordable machine learning platform for simultaneous dengue and zika detection using fluorine‐doped tin oxide thin films modified with gold nanoparticles and DNA aptamers. Designed for low‐cost, hardware‐limited devices (< $25), the model achieves 95.3% accuracy and uses only 9.4 kB of RAM, demonstrating viability for resource‐
Marina Ribeiro Batistuti Sawazaki, Bassam Bachour Junior, Marcelo Mulato, José Ilton de Oliveira Filho   +3 more
wiley   +1 more source

Contribuição ao manejo sustentável do complexo ferruginoso nectandra na floresta nacional de Ibirama, SC Contribution to sustainable forest management of the nectandra ferruginous complex in the Ibirama national forest, SC, Brazil

Revista Árvore, 2009
Diante do mercado aberto para a produção de madeiras tropicais, o complexo ferruginoso Nectandra (CFN), formado pelo grupo de espécies Nectandra lanceolata, N. oppositifolia e N.
Fernando Campanhã Bechara, Erasmo Nei Tiepo, Ademir Reis   +2 more
doaj   +1 more source

Characteristics of Tropical Wood Lignin (1)

JAPAN TAPPI JOURNAL, 1971
It has been reported previously that the tropical wood-lignins, especially the hard wood-lignins showed much differences in comparison with the ordinary hard wood-lignins, that is the higher lignin content, the low methoxyl content and differences in UV- and IR-spectra as well as the low ratio of syringaldehyde to vanillin on alkaline nitrobenzene ...
Koichi Ogiyama, Eiichi Taniguchi
openaire   +2 more sources

Factorization Machine‐Based Active Learning for Functional Materials Design with Optimal Initial Data

Advanced Intelligent Discovery, EarlyView.
This work investigates the optimal initial data size for surrogate‐based active learning in functional material optimization. Using factorization machine (FM)‐based quadratic unconstrained binary optimization (QUBO) surrogates and averaged piecewise linear regression, we show that adequate initial data accelerates convergence, enhances efficiency, and ...
Seongmin Kim, In‐Saeng Suh
wiley   +1 more source

A densidade básica e característica anatômicas variam radialmente na madeira de Astronium graveolens Jacq. (Anacardiaceae). Basic density and anatomical features vary in the radial direction in the wood of Astronium graveolens Jacq. (Anacardiaceae). [PDF]

Revista do Instituto Florestal, 2011
Estudos sobre variações nas dimensões celulares de espécies arbóreas de clima tropical são escassos. Sendo assim, o objetivo deste trabalho foi caracterizar a variação da densidade básica e da anatomia no sentido radial da madeira de Astronium graveolens
Camila Moura SANTOS, Israel Luiz de LIMA, Eduardo Luiz LONGUI, Diego ROMEIRO, Antonio Carlos Scatena ZANATTO, Eurípedes MORAIS, Marcelo ZANATA, Sandra Monteiro Borges FLORSHEIM   +7 more
doaj