Results 21 to 30 of about 283,870 (307)

Distribution and Enrichment Characteristics of Selenium in Soil and Crops in Luoyang City, Henan Province

Yankuang ceshi, 2022
BACKGROUND The analysis of selenium enrichment characteristics in various crops planted in a certain area and investigation and evaluation of selenium content in selenium fertilizer crops can provide a basis for the development of selenium-enriched ...
SONG Yanbin, WANG Xikuan, XIA Yan, HOU Jinkai, ZHAO Rui   +4 more
doaj   +1 more source

Evaporate salt exploration by two dimensional (2D) seismic reflection method: Ankara- Polatlı region, Türkiye

Bulletin of the Mineral Research and Exploration, 2023
The presence of the evaporate salt zone in Ankara-Polatlı region has been determined by the drillings. It is thought to be the largest reserve in Türkiye. The seismic reflection method was used to determine the top-bottom levels of the region; its depth;
Büşra Bihter Demirci, Esra Burcu Köse, Muzaffer Özgü Arısyo, Sinem Aykaç, Abdullah Gürer, İmam Çelik, Tuğçe Can, Sermet Gündüz, Sami Aytaç Özdemir, Batuğhan Yıkmaz, Erdoğan Yılmaz, Erdi Apatay, Esra Ak, Salih Erden, Erdener Izladı, Zeynep Rezzan Özerk, Recep Güney   +16 more
doaj   +1 more source

Formation characteristics of newly discovered Akçal (Balıkesir) Au-Ag epithermal mineralization in Extensional Tectonics of Biga Peninsula, Western Tethyan Belt

Bulletin of the Mineral Research and Exploration
Akçal Au-Ag mineralization is located in one of the most important metallogenic provinces in Tethys Orogenic Belt, Biga Peninsula. In the study area, widespread argillic alteration is observed and mined in previous years.
Ramazan Sari, Zehra Deveci Aral, Şahset Küçükefe, Elif Dilek Bayrakçıoğlu, Ahmet Metin Öteleş, Mehmet Barış Durgun, Buğra Çavdar, Cahit Dönmez   +7 more
doaj   +1 more source

Influence of initial compaction and confining pressure on the hydraulic conductivity of compacted iron ore tailings [PDF]

E3S Web of Conferences
The hydraulic conductivity of iron tailings is an important factor affecting the stability of tailings storage facilities. Stacking compacted filtered ore tailings is a promising alternative for safer tailings disposal. These tailings storage facilities’
dos Santos Roberto Aguiar, Delgado Bruno Guimarães, Rissoli Ana Luisa Cezar, Silva João Paulo de Sousa, Dal Toé Casagrande Michéle   +4 more
doaj   +1 more source

Mineral Exploration at the Kimmeria Fe-Cu Skarn Deposit, N. Greece: Reassessment and New Perspectives Focusing on the CRMs

Materials Proceedings
Following the worldwide increasing demand for Critical Raw Materials (CRMs), the Hellenic Geological Survey (HSGME) implemented a national project focused on the re-evaluation of certain Public Mining Areas in Greece.
Michalis Fitros, Constantinos Mavrogonatos, Marianthi Anastasatou, Adamantia Chatziapostolou, Konstantinos Laskaridis, Petros Karmis, Magdalini Angeli, Dimitrios Tsouvalas, Alexandros Liakopoulos, Dimitrios Tarenidis, Vasiliki Angelatou   +10 more
doaj   +1 more source

Combining Karhunen–Loève expansion and stochastic modeling for probabilistic delineation of well capture zones in heterogeneous aquifers

Frontiers in Earth Science, 2023
The delineation of well capture zones (WCZs), particularly for water supply wells, is of utmost importance to ensure water quality. This task requires a comprehensive understanding of the aquifer’s hydrogeological parameters for precise delineation ...
Wenfeng Gao, Guangyu Shao, Tengqiao Zhu, Simin Jiang   +3 more
doaj   +1 more source

The C-H-O Isotopic Composition and Significance of Spodumene for Redamen Pegmatite Type Rare Metal Deposit in Western Sichuan

Kuangchan zonghe liyong, 2023
The Redamen rare metal deposit is located in the south western part of Keeryin pegmetite typed ore field in western Sichuan. It is a special deposit in the aspects of surrounding rock, element mineralization zoning and distance.
Wei Zhang, Lin Zou, Wenchun Tang, Jian Huang, Wei Duan, Guibing Yang, Yingwu Fan, Xiaosong Li, Jianguo Huang   +8 more
doaj   +1 more source

Structural biology of ferritin nanocages

FEBS Letters, EarlyView.
Ferritin is a conserved iron‐storage protein that sequesters iron as a ferric mineral core within a nanocage, protecting cells from oxidative damage and maintaining iron homeostasis. This review discusses ferritin biology, structure, and function, and highlights recent cryo‐EM studies revealing mechanisms of ferritinophagy, cellular iron uptake, and ...
Eloise Mastrangelo, Flavio Di Pisa
wiley   +1 more source

A methionine‐lined active site governs carbocation stabilization and product specificity in a bacterial terpene synthase

FEBS Letters, EarlyView.
This study reveals a unique active site enriched in methionine residues and demonstrates that these residues play a critical role by stabilizing carbocation intermediates through novel sulfur–cation interactions. Structure‐guided mutagenesis further revealed variants with significantly altered product profiles, enhancing pseudopterosin formation. These
Marion Ringel, Carl P. O. Helmer, Shani Zev, Ronja Driller, Emily Buhr, Markus Reinbold, Renana Schwartz, Gabriel Foley, Mikael Boden, Daniel Garbe, Gerhard Schenk, Dan Thomas Major, Bernhard Loll, Thomas Brück   +13 more
wiley   +1 more source

Determination of Bromine in Brine by Wavelength Dispersive X-ray Fluorescence Spectrometry with Film Adsorption Pretreatment

Yankuang ceshi, 2015
Bromine exists mainly as ions in bromide brine and halide sulfate brine in the hydrosphere of the crust. Powder carrier pellet method is commonly used in analyzing bromine in brine by Wavelength Dispersive X-ray Fluorescence Spectrometry (WDXRF). However,
CHEN Jing-wei, SONG Jiang-tao, ZHAO Qing-ling, SONG Shuang-xi, TANG Yun-zhi, GENG Nan   +5 more
doaj   +1 more source