Results 141 to 150 of about 87,639 (320)

Pyrite and Pyrrhotite [PDF]

, 1979
Pyrite and pyrrhotite are the only minerals other than native sulphur used in the manufacture of sulphuric acid. Pyrite is known to occur separately in Amjhore area of Bihar and as associated mineral in the complex base metal sulphides of ...
Altekar, V A, Prasad Rao, P D, Mathur, G P, Peravadhanulu, A   +3 more
core   +1 more source

Nano‐pyrite as a plant hormone regulator: Emulating seed hormopriming

Modern Agriculture
‘Pre‐sowing seed priming’ and ‘pre‐transplanting root priming’ are promising strategies to improve agriculture productivity. Farmers, seed production enterprises, and seedling producers constantly search for economic priming agents that help improve ...
Brijesh Kaler, Himanshi Jangir, Sabyasachi Sarkar, Jayprakash Sharma, Mainak Das   +4 more
doaj   +1 more source

Pyrite

FeS2 - Mohs Hardness: 6-6 1/2. The name pyrite comes from pyrite lithos, which, in Greek, means 'stone which strikes fire' in reference to the tendency of the mineral to spark when struck against steel.
Wolf, Ron
core   +2 more sources

Mineralization and trace element distribution in pyrite using EMPA in exploration drill holes from Cheshmeh Zard gold district, Khorasan Razavi Province, Iran

Journal of Economic Geology, 2015
Introduction Pyrite is the most abundant sulfide mineral in low sulfidation ore deposits. Experimental studies have shown that low-temperature ( 200°C) from hydrothermal or metamorphic fluids (Butler and Rickard, 2000).
Zahra Alaminia, Mohammad Hassan Karimpour, eyed Massoud Homam   +2 more
doaj  

GOLDEN PYRITES FROM THE IBERIAN PYRITE BELT [PDF]

Goldschmidt2021 abstracts, 2021
Lola Yesares Ortiz, Rubén Piña, Jose María González-Jiménez, Sáez Ramos Reinaldo, Gabriel Ruiz de Almodovar, Joaquín Proenza, Juan Manuel Pons   +6 more
openaire   +1 more source

Utilização de compósito carvão/Fe2O3 e pirita como catalisadores de peroxidação de efluentes têxteis [PDF]

, 2007
Dissertação (mestrado) - Universidade Federal de Santa Catarina, Centro Tecnológico. Programa de Pós-Graduação em Engenharia QuímicaÓxidos de ferro são catalisadores efetivos na oxidação catalítica do peróxido de hidrogênio e este processo tem sido ...
Machado, Luciano Luiz
core  

Histology and fossil diagenesis of a pterosaur tooth from the Crato Formation (Lower Cretaceous of Brazil)

The Anatomical Record, Volume 309, Issue 10, Page 2739-2751, October 2026.
Abstract Pterosaur dental biology remains poorly understood despite its importance for comprehending feeding strategies and flight adaptations. Here, we present the first comprehensive histological analysis of an ornithocheiriform pterosaur tooth from the Lower Cretaceous Crato Formation (Santana Group, Northeast Brazil).
Tito Aureliano, Matheus P. S. Rocha, Francisco P. Lima‐Filho, Aline M. Ghilardi   +3 more
wiley   +1 more source

Machine Learning Approaches for Predicting Total Organic Carbon From Petrophysical Well Logs in the Wufeng–Longmaxi Shale, Southeast Sichuan Basin, China

Geoscience Data Journal, Volume 13, Issue 4, October 2026.
This study demonstrates the application of machine learning models—Random Forest, XGBoost, and Multiple Linear Regression—to predict Total Organic Carbon (TOC) from well logs, significantly improving TOC prediction accuracy and reliability across diverse geological settings compared to traditional log‐based methods.
Haseeb Ahmad, Jiang Shu, Naveed Rehman, Muhammad Asad, Muhammad Tariq, Aqib Saeed, Attiqullah Ayaz   +6 more
wiley   +1 more source

The Material Basis of 18th‐Century Meissen Porcelain

Archaeometry, Volume 68, Issue 5, Page 908-918, October 2026.
ABSTRACT In the summer of 1708, the quest for making hard‐paste porcelain from Saxonian clay and other mineral resources succeeded. This was achieved by applying as its essential ingredient newly discovered pure kaolin from Heidelsberg near Aue, western Saxon Ore Mountains.
Robert B. Heimann
wiley   +1 more source

Early Bronze Age Copper Circulation in the Guadalentín and Segura Valleys (SE Spain)

Archaeometry, Volume 68, Issue 5, Page 1139-1151, October 2026.
ABSTRACT Identifying the sources of copper used in Early Bronze Age metalwork from south‐east Spain is key to resolving a long‐running debate concerning centralized control, or lack thereof, over El Argar society's economic organisation. This study provides the first substantial integrated programme of EDXRF and MC‐ICP‐MS analyses for copper‐base ...
Dirk Brandherm, Ignacio Montero‐Ruiz
wiley   +1 more source