Results 61 to 70 of about 6,407 (226)

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

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

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  

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  

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

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

Soil Contamination Around the Copper Smelter and the Use of Soil Microarthropods as Bioindicators

Land Degradation &Development, EarlyView.
ABSTRACT Soil contamination from smelter emissions, including heavy metals (HM), rare earth elements (REEs), and sulfur, poses a significant threat to soil ecosystems. In the immediate vicinity of the Głogów Copper Smelter, HM concentrations were several times higher than in more distant forest stands.
Jacek Malica, Cezary K. Urbanowski, Mirosław Mleczek, Krzysztof Turczański, Przemysław Niedzielski, Anna Wierzbicka, Agnieszka Andrzejewska, Radosław Witkowski, Maciej Skorupski, Emilia Pers‐Kamczyc, Jacek Kamczyc   +10 more
wiley   +1 more source

Electrospun fibrous sorbents for the removal of uranium and americium from aqueous media

Polymer International, EarlyView.
Polymethacrylate‐based electrospun microfibers with tertiary amino functionalities are evaluated as adsorbents for U‐232 and Am‐241 in both simplified and complex (seawater) water matrices, highlighting their ability for efficient actinide removal. Abstract Polymethacrylate‐based electrospun microfibers containing tertiary amino functionalities were ...
Andreas Hadjianastasi, Ioannis Ioannidis, Petri C Papaphilippou, Ioannis Pashalidis, Theodora Krasia‐Christoforou   +4 more
wiley   +1 more source

Repeated Pleistocene Permafrost Episodes in the Western Pannonian Basin

Permafrost and Periglacial Processes, EarlyView.
ABSTRACT Concerning the study of past periglacial processes, the Pannonian Basin is a key area as it contains the southernmost frost polygons found in Central Europe. The presence or absence of permafrost is still, however, a matter of debate, and data on the timing of frost action are also scarce.
Krisztina Sebe, Ágnes Novothny, Gergely Surányi, Barbara Varga, László Fodor, Gábor Csillag   +5 more
wiley   +1 more source