Results 291 to 300 of about 23,253,765 (333)

Improving the efficiency of sediment charcoal image analysis

The Holocene, 2021
Imaging of charcoal particles extracted from lake sediments provides an important way to understand past fire regimes. Imaging of large numbers of particles can be time consuming. In this note we explore the effects of subsampling and extrapolation of area on estimates of sum charcoal area, using resampling of real and simulated data sets and propose ...
Charles E Umbanhowar, James A Umbanhowar
openaire   +1 more source

Analysis the Effect of Charcoal Mass Variation to Ni Content, Sinter Strength and Yield on Sintering Process of Limonitic Laterite Nickel Ore

, 2020
The depletion of sulfide nickel ore and the growing of stainless steel demand each year cause the use of low-grade laterite nickel ore continues to increase. Due to very low nickel content, there is no optimal process to extract them.
F. Abdul, S. Pintowantoro, Ari Maulidani
semanticscholar   +1 more source

Analysis of impregnated charcoals by desorption ionization mass spectrometry

Analytical Chemistry, 1984
Analyse des adsorbats et des produits d'impregnation par spectrometrie de masses a ionisation par desorption, spectrometrie SIMS et spectrometrie ...
M M, Ross, D A, Kidwell, J E, Campana
openaire   +2 more sources

Charcoal Sampling Tubes for Organic Vapor Analysis by Gas Chromatography

American Industrial Hygiene Association Journal, 1966
Abstract Variation in efficiency of recovery of organic vapors collected on activated charcoal and desorbed into carbon disulfide, was studied with respect to certain parameters of the process. Chemicals used were methylethyl ketone, toluene, trichloroethylene, butyl acetate, 2-methylcyclobexanol, and styrene.
C L, Fraust, E R, Hermann
openaire   +2 more sources

Predictive Middle Palaeolithic climatic conditions from Eastern Iberia: a methodological approach based on charcoal analysis and modelling

Archaeological and Anthropological Sciences, 2020
Paloma Vidal-Matutano, Salvador Pardo-Gordó   +1 more
semanticscholar   +1 more source

Archaeobotanical and charcoal analysis

2022
Mary Dillon, Ingelise Stuijts
openaire   +1 more source

QUALITATIVE PHYTOCHEMICAL ANALYSIS OF INDIAN CHARCOAL-TREE

The qualitative phytochemical screening of Trema orientale (L.) Blume (Indian Charcoal-Tree) was carried out using aqueous extract of different plant parts (leaves, stem, and fruits). The results showed diverse secondary metabolites like tannin, flavonoids, phenolic compounds, reducing sugar, alkaloids etc.
VALIGATLA, DEEPTHI, ALAM, SK SAHANAWAZ, SHAW, RANJAN, JENA, NIBEDITA, KUMAR, SANJEET   +4 more
openaire   +1 more source

Forestry control in the Brazilian Amazon III: anatomy of wood and charcoal of tree species from sustainable forest management

IAWA Journal
The illegal harvest of timber and the subsequent production of charcoal have been contributing to the deforestation of the Brazilian Amazon and its degradation.
Alana Assunção da Silva, Kaick Coelho de Sousa, Fernanda Ilkiu Borges de Souza, João Rodrigo Coimbra Nobre, Thiago de Paula Protásio, Luiz Eduardo de Lima Melo   +5 more
semanticscholar   +1 more source

Charcoal Analysis for Paleoenvironmental Interpretation: A Chemical Assay

Quaternary Research, 1985
A nitric acid digestion and ignition technique developed to measure relative frequencies of charcoal in lake and bog sediments measures the weight of charcoal relative to the dry weight of the sample (percentage charcoal) and gives results comparable to counting of microscopic charcoal.
openaire   +1 more source

Charcoal recognition, taphonomy and uses in palaeoenvironmental analysis

Palaeogeography, Palaeoclimatology, Palaeoecology, 2010
Abstract Charcoal, predominantly the product of wildfires, is abundant in many sedimentary rocks deposited in a wide range of environments, from terrestrial to marine. It also occurs in some volcanic rocks. This paper outlines aspects of charcoal formation (both natural and experimental) and briefly considers the taphonomic processes leading to a ...
openaire   +1 more source