Results 61 to 70 of about 6,376 (214)

A Universally Applicable Strategy for Construction of Anti‐Biofouling Adsorbents for Enhanced Uranium Recovery from Seawater

Advanced Science, 2019
The ocean reserves 4.5 billion tons of uranium and amounts to a nearly inexhaustible uranium supply. Biofouling in the ocean is one of the most severe factors that hazard uranium extraction and even cause the failure of uranium extraction.
Qiuhan Yu, Yihui Yuan, Jun Wen, Xuemei Zhao, Shilei Zhao, Dong Wang, Chaoyang Li, Xiaolin Wang, Ning Wang   +8 more
doaj   +1 more source

The Behavior of Uranium in the Extraction with Benzyldodecylamine

Nippon kagaku zassi, 1961
アミン類は選択性の面で他の溶媒とくらべてすぐれているため,ウランの抽出に広く使用されている。このうちペンジル基をもつ第ニアミン類は高い抽出力をもち着目されているが,こめ種のアミン類による抽出の基礎が明らかでない。したがってベンジルドデシルアミンを使ってウランの抽出挙動および抽出機構を調べた。硫酸ナトリウム0.1～1.0mol/l,酸性度0.1～1.0Nの広い範囲でウランは1:1硫酸錯塩の形で実質上完全に有機層に抽出され,有機層内では抽出された硫酸ウラニル1分子についてベンジルドデシルアミンの4個が配位する。
openaire   +2 more sources

Apatite in Carbonatite Preserving Primary Magmatic, Post‐Magmatic Overgrowth, and Post India‐Asia Collision‐Related Hydrothermal Alteration: Evidenced From U–Pb Isotope and Trace Element Geochemistry

Geological Journal, EarlyView.
U–Pb isotope and trace element geochemistry of apatite from carbonatites of Peshawar Plain Alkaline Igneous Province, western Himalaya shows Permo‐Carboniferous magmatism, an additional magmatic pulse during Cretaceous, and post‐magmatic hydrothermal/metasomatism during Oligocene. ABSTRACT U–Pb isotope and trace element geochemistry of apatite combined
Mehboob ur Rashid, Hafiz U. Rehman, Hao‐Yang Lee, Sun‐Lin Chung, Kaushik Das, Kazumasa Aoki, Muhammad Jawad Zeb, Nasir Ahmad, Muhammad Hussain, Hiroshi Yamamoto   +9 more
wiley   +1 more source

Uranium Extraction from Syrian Phosphate: A case Study [PDF]

International Journal of Economic and Environment Geology, 2010
Uranium and trace elements were studied in few hundred samples from phosphatic formations in Syria. Uranium and trace elements were enriched in phosphorites facies compared to carbonate and siliceous facies.
J.STAS, I. OTHMAN, M. ABBAS, H. SHLEWIT
doaj  

The relationship between cellular protein content and selenium accumulation in freshwater microalgae

Integrated Environmental Assessment and Management, EarlyView.
Abstract Variability in the bioconcentration of selenium (Se) by primary producers at the base of the food web results in uncertainty in predictions of bioaccumulation and ecological risk to higher trophic level organisms. Water chemistry, speciation of Se, and periphyton community composition have all been suggested as factors that contribute to ...
Courtney Bogstie, Melanie Gallant, James R. Elphick, Christopher Kennedy   +3 more
wiley   +1 more source

The study of change in extraction degree under the influence of oxidizers while leaching Uranium ore with sulfuric acid

Вестник КазНУ. Серия математика, механика, информатика, 2017
Sulfuric acid is extensively used in uranium production with In-Situ Leaching method. The influence of various components on the extraction degree has to be studied in order to optimize the solution spending and extraction degree of uranium.
M. B. Kurmanseiit, D. Y. Aizhulov, M. S. Tungatarova   +2 more
doaj  

Successive Uranium and Thorium Separation from Leach Liquor of Ore Deposit of 5th Anomaly of Saghand by Solvent Extraction [PDF]

مجله علوم و فنون هسته‌ای, 2014
The present work deals with successive uranium and thorium recovery from the sulfate leach liquor of the ore deposit of the 5th Anomaly of Saghand using liquid-liquid extraction technique, where trioctylamine (TOA) and di-(2-ethylhexyl) phosphoric acid ...
S A. Milani, B Maraghe Mianji, A. A Abhari   +2 more
doaj  

DNA nano-pocket for ultra-selective uranyl extraction from seawater

Nature Communications, 2020
The extraction of metals from seawater is an area of great potential; especially for the extraction of uranium. Here, the authors report on the synthesis of a DNA based uranium adsorbent with high selectivity and demonstrate the potential for the DNA ...
Yihui Yuan, Tingting Liu, Juanxiu Xiao, Qiuhan Yu, Lijuan Feng, Biye Niu, Shiwei Feng, Jiacheng Zhang, Ning Wang   +8 more
doaj   +1 more source

High‐Throughput Geocoding to Assess Short‐Term Air Pollution in Correlation With Mortality in a French Cancer Patient Cohort

International Journal of Cancer, EarlyView.
Although chronic air pollution exposure is linked to lung cancer mortality, the short‐term effects of fluctuating air quality on overall cancer mortality remain uncertain. Here, the authors applied geomatics and machine‐learning models to retrospectively examine possible associations between 31‐day pollution exposure and mortality in a French cancer ...
Loice Pokam, Joséphine Bocquet, Nadia Hégarat, Julie Perlbarg‐Samson, Thomas Balezeau, Maud Milder, Bastien Rance, Hector Countouris, Julien Guerin, Flavien Gilles, Jean Gaudart, Nicolas Girard, Clémence Basse   +12 more
wiley   +1 more source

A Personal Perspective on Metalloprotein Structure and the Future of Macromolecular X‐Ray Crystallography

Journal of the Chinese Chemical Society, EarlyView.
While X‐ray crystallography has been the primary method for determining the structures of metalloproteins, cryoEM has taken over this role, illustrated by [4Fe4S]‐cluster containing proteins deposited in the Protein Data Bank. What will be the role for X‐ray crystallography as cryoEM and machine learning methods dominate the initial structural analysis?
Douglas C. Rees
wiley   +1 more source