Results 51 to 60 of about 128,867 (311)

The incredible lightness of being methane-fuelled: stable isotopes reveal alternative energy pathways in aquatic ecosystems and beyond

Frontiers in Ecology and Evolution, 2016
We have known about the processes of methanogenesis and methanotrophy for over 100 years, since the days of Winogradsky, yet their contributions to the carbon cycle were deemed to be of negligible importance for the majority of that period. It is only in
Jonathan eGrey
doaj   +1 more source

O, H and C isotopic systematics of Icelandic groundwater [PDF]

E3S Web of Conferences, 2019
Stable water isotopes of oxygen and hydrogen have been studied in Icelandic natural waters since 1960 for hydrological and geothermal research. All the waters are of meteoric and seawater origin.
Sveinbjörnsdóttir Arny E., Stefánsson Andri, Heinemeier Jan   +2 more
doaj   +1 more source

Bright Monocompound Metal Halide Scintillator for Fast Neutron Radiography

Advanced Functional Materials, EarlyView.
Metal halide scintillator, tetraphenylphosphonium manganese bromide (TPP2MnBr4), provides a significant benefit for fast neutron imaging. A fourfold increase in efficiency over traditional zinc sulfide screens is achieved by efficiently utilizing neutron interactions within its homogeneous structure.
Aditya Bhardwaj, Kostiantyn Sakhatskyi, Anastasiia Sakhatska, Pavel Trtik, Ye Wu, Yevhenii Padniuk, Yuliia Kominko, Kai Han, Vladyslav Orlov, Markus Strobl, Andrey L. Rogach, Zhiguo Xia, Sergii Yakunin, Maksym V. Kovalenko   +13 more
wiley   +1 more source

Mass-spectrometric study on 13C/12C carbon and 18O/16O oxygen stable isotopes distributions in grapes and wines from the Black Sea regions

BIO Web of Conferences, 2019
The present study continues the 2015–2016 research project on biological characteristics of stable isotopes fractionation in grapes taking into account the agro-climatic growth conditions of this representative of the C3-pathway of photosynthesis group ...
Kolesnov A., Zenina M., Tsimbalaev S., Tereshenko G., Torshina L., Anikina N., Gnilomedova N., Gerzhikova V., Egorov E., Guguchkina T., Prakh A., Antonenko M.   +11 more
doaj   +1 more source

Temperature exerts no influence on organic matter δ¹³C of surface soil along the 400 mm isopleth of mean annual precipitation in China [PDF]

Biogeosciences, 2016
Soil organic carbon is the largest pool of carbon in the terrestrial ecosystem, and its isotopic composition is affected by a number of factors. However, the influence of environmental factors, especially temperature, on soil organic carbon isotope ...
Y. Jia, G. Wang, Q. Tan, Z. Chen
doaj   +1 more source

High‐Density Boron Nitride Nanotube Composites via Surfactant‐Stabilized Lyotropic Liquid Crystals for Enhanced Space Radiation Shielding

Advanced Functional Materials, EarlyView.
High‐density BNNT films, enabling mechanical robustness and high space radiation shielding effectiveness, are fabricated using surfactant‐stabilized BNNT liquid crystal. Simulations indicate that a 50 g cm−2 BNNT film can reduce radiation exposure by 56% compared to zero shielding, potentially doubling the duration of astronaut missions on the lunar ...
Young‐Kyeong Kim, Ik Jae Lim, Hongjin Lim, Yongbi Joo, Jueun Park, Md Monir Hossain, Hyunjin Cho, Nam‐Ho You, Seokhoon Ahn, Hunsu Lee, Sang Seok Lee, Yongho Joo, Se Youn Moon, Hee Il Yoo, Calista Lum, Cheol Park, Siyoung Q. Choi, Se Gyu Jang   +17 more
wiley   +1 more source

Engineering Oxygen Vacancy in Support to Promote Activity of In2O3 Catalyst for CO2 Electroreduction to Formate

Advanced Functional Materials, EarlyView.
A novel approach by depositing In2O3 onto an oxygen vacancy (OV)‐enriched support, ceria‐zirconia solid solutions (CZ), to activate synergistic effects is proposed. The OV contributes greatly to the dissociation of H2O and further promotes the hydrogenation of adsorbed CO2 species.
Ruirui Qi, Manfen Liang, Zhichao Miao, Haimei Xu, Yunzhao Fan, Jinglin Mu, Weisong Feng, Lechen Diao, Jin Zhou, Xiaoning Li, Tianyi Ma   +10 more
wiley   +1 more source

Understanding Decoherence of the Boron Vacancy Center in Hexagonal Boron Nitride

Advanced Functional Materials, EarlyView.
State‐of‐the‐art computations unravel the intricate decoherence dynamics of the boron vacancy center in hexagonal boron nitride across magnetic fields from 0 to 3 T. Five distinct regimes emerge, dominated by nuclear spin interactions, revealing optimal coherence times of 1–20 µs in the 180–350 mT range for isotopically pure samples.
András Tárkányi, Viktor Ivády
wiley   +1 more source

Ancient Modeling of Hydrology Based on Comparison of δo18 Carbonate and the δo13 Crbonate Parishan Lake (Fars Province) Dariush Noorollahi M.Sc Climatology University of Shahid Beheshti Dr. Hassan Lashkari Associate Profesor of Natural Geography University of Shahid Beheshti Maria Amirzade Faculty of Earth science University of Shahid Beheshti [PDF]

جغرافیا و توسعه, 2012
Geography and Development 10nd Year - No. 29 - Winter 2013 Received : 31/1/2012   Accepted : 17/7/2012 PP: 28 - 31   Ancient Modeling of Hydrology Based on Comparison of δo18 Carbonate and the δo13 Crbonate Parishan Lake (Fars Province)   Dariush ...
doaj   +1 more source

The evolution of carbon, sulphur and titanium isotopes from high redshift to the local Universe [PDF]

, 2008
Recent observations of carbon, sulphur and titanium isotopes at redshifts z∼1 and in the local stellar disc and halo have opened a new window into the study of isotopic abundance patterns and the origin of the chemical elements.
G. L. Hughes, B. Gibson, L. Carigi, P. Sánchez-Blázquez, J.M.Chavez, D. Lancashire, Universidad Autonoma de Mexico, U. Texas   +7 more
semanticscholar   +1 more source