Results 31 to 40 of about 515,005 (311)

Characteristics of Carbon and Oxygen Isotope Standard Materials of Carbonates and Their Effect on Isotope Analysis and Standard Preservation

Yankuang ceshi, 2021
BACKGROUND Carbon and oxygen isotopes in carbonates are commonly used in geology and climate studies. Reference materials for these isotopes are an important basis for analysis and data comparison.
HU Zhi-zhong, YAN Xiong, WANG Kun-yang, WANG Guan, PAN Zhong-xi, DU Gu   +5 more
doaj   +1 more source

Hydrology of the Upper Yakima River Basin, Washington [PDF]

, 1985
https://digitalcommons.cwu.edu/government_posters/1172/thumbnail ...
United States Geological Survey
core   +1 more source

Liquid Phase Transmission Electron Microscopy: A Window into the Early Stages of Complex Material Formation

Advanced Functional Materials, EarlyView.
Liquid‐phase transmission electron microscopy enables direct observation of nucleation and growth processes in solution. This review is dedicated to the remembrance of Helmut Cölfen and highlights recent studies on complex materials—oxides, biominerals, organic–inorganic crystals—which were central to his research activity. It summarizes key milestones,
Charles Sidhoum, Vinavadini Ramnarain, Nathaly Ortiz Peña, Dris Ihiawakrim, Clément Sanchez, Ovidiu Ersen   +5 more
wiley   +1 more source

Colonial Geological Surveys [PDF]

Nature, 1944
IN his article on Colonial Geological Surveys in NATURE of March 4, Mr. V. A. Eyles gave a useful resume of recent discussions. There are, however, some further considerations to be noted. The figures he quoted from Sir Edmund Teale's paper of the results of mining operations, following upon the activities of Colonial Geological Surveys, do not include
openaire   +3 more sources

Tailoring K+/Vacancy Disordered Layered Oxide via Charge Engineering for Stabilizing High‐Performance Potassium‐Ion Batteries

Advanced Functional Materials, EarlyView.
With a charge‐ion coupling engineering strategy, a K+/vacancy disordered K0.5Mn0.8Co0.1Ti0.1O2 material has been designed. The targeted transition metal doping disrupts charge ordering and inducing K+/vacancy disordering, thereby enabling rapid K+ diffusion through interconnected channels and a stable solid‐solution reaction mechanism.
Yongfeng Jia, Xuanpeng Wang, Jiashen Meng, Lujun Zhu, Fanjie Xia, Hong Wang, Fang Liu, Xiao Zhang, Quanquan Pang, Jian Wang, Zhitong Xiao   +10 more
wiley   +1 more source

Determination of Major Elements in Sepoilite by Inductively Coupled Plasma-Optical Emission Spectrometry with Opening Acid Dissolution

Yankuang ceshi, 2020
BACKGROUND Sepiolite is a widely used fibrous magnesium-rich silicate clay mineral. Sepiolite is mainly composed of silicon and magnesium, with minor aluminum, potassium, sodium and other impurities.
WANG Li-qiang, WANG Jia-song, XU Tie-min, WU Liang-ying, ZENG Jiang-ping, ZHENG Zhi-kang, WEI Shuang   +6 more
doaj   +1 more source

Sir Henry Thomas De la Beche and the founding of the British Geological Survey [PDF]

, 2010
The founding of the Geological Survey by Henry De la Beche in 1835 is a key event in the history of British geology. Yet the Survey’s initiation actually began three years earlier when De la Beche secured financial assistance from the Board of Ordnance ...
Bate, David G.
core  

Spiro‐Phenothiazine Hole‐Transporting Materials: Unlocking Stability and Scalability in Perovskite Solar Cells

Advanced Materials, EarlyView.
Fluorene‐functionalized spiro‐phenothiazine (PTZ‐Fl) exhibits strong Li+ affinity and thermal stability, enabling a PCE of 25.75% in small‐area cells and 22.07% in 25 cm2 modules. Under ISOS‐L3 conditions, PTZ‐Flbased devices retain over 80% efficiency after 1000 hours, demonstrating superior stability and scalability compared to spiro‐OMeTAD for next ...
Javier Urieta‐Mora, Seung Ju Choi, Jaeki Jeong, Silvia Orecchio, Inés García‐Benito, Manuel Pérez‐Escribano, Joaquín Calbo, Likai Zheng, Minseop Byun, Seyeong Song, Gi‐Hwan Kim, Shaik M. Zakeeruddin, Seog‐Young Yoon, Yimhyun Jo, Agustín Molina‐Ontoria, Enrique Ortí, Nazario Martín, Michael Grätzel   +17 more
wiley   +1 more source

Over a third of groundwater in USA public-supply aquifers is Anthropocene-age and susceptible to surface contamination

Communications Earth & Environment, 2022
Principal aquifers in the US with a large fraction of Anthropocene groundwater are susceptible to land-surface contamination, according to the cumulative distribution function analysis of the groundwater age.
Bryant C. Jurgens, Kirsten Faulkner, Peter B. McMahon, Andrew G. Hunt, Gerolamo Casile, Megan B. Young, Kenneth Belitz   +6 more
doaj   +1 more source

Knowledge-based systems and geological survey [PDF]

, 2005
This personal and pragmatic review of the philosophy underpinning methods of geological surveying suggests that important influences of information technology have yet to make their impact.
Loudon, T.V.
core