Results 91 to 100 of about 14,867 (279)
Abrupt Geographic Shift in Hydrogen Isotope Ratios of Meteoric Water Across the Western Andes, Peru
Geophysical Research LettersQuantitative isotopic paleoaltimetry has been applied in regions where Rayleigh distillation controls isotopic lapse rates. Air mass mixing and moisture recycling are viewed as complicating factors.
Emily J. White +2 more
doaj +1 more source
Molecular cloning of the gene for 2,6-β-d-fructan 6-levanbiohydrolase fromStreptomyces exfoliatusF3-2 [PDF]
FEMS Microbiology Letters, 2003 The gene encoding a 2,6-beta-D-fructan 6-levanbiohydrolase (LF2ase) (EC 3.2.1.64) that converts levan into levanbiose was cloned from the genomic DNA of Streptomyces exfoliatus F3-2. The gene encoded a signal peptide of 37 amino acids and a mature protein of 482 amino acids with a total length of 1560 bp and was successfully expressed in Escherichia ...
Katsuichi, Saito +3 more
openaire +2 more sources
Can δD and δ18O stable isotopes be used to detect long-range dispersal among carabid beetles?
, 2017 We studied if hydrogen (δD) and oxygen (δ18O) stable isotope values in three common carabid species in intensively managed agricultural landscapes in southernmost Sweden indicate long-range dispersal.
Erkki Palmu +11 more
core +1 more source
A Q‐Learning Algorithm to Solve the Two‐Player Zero‐Sum Game Problem for Nonlinear Systems
International Journal of Adaptive Control and Signal Processing, Volume 39, Issue 3, Page 566-581, March 2025.A Q‐learning algorithm to solve the two‐player zero‐sum game problem for nonlinear systems. ABSTRACT This paper deals with the two‐player zero‐sum game problem, which is a bounded L2$$ {L}_2 $$‐gain robust control problem. Finding an analytical solution to the complex Hamilton‐Jacobi‐Issacs (HJI) equation is a challenging task.
Afreen Islam +2 more
wiley +1 more source
Frontiers in Earth Science, 2021 Speleothem calcite stable oxygen isotope (δ18OC) is one of the most widely used proxies in paleoclimate research, and understanding its seasonal-annual variability is very significant for palaeoclimate reconstruction.
Ye Tian +9 more
doaj +1 more source
Edible Cuttlefish Ink: Complex Chemistry, Structure, and Electrical Response
Advanced Engineering Materials, EarlyView.An integrated approach of chemistry‐structure‐electrical properties is used to assess the potential of edible cuttlefish ink as a bio‐based conductive ink for printable electronics. Chromatography and Neutron Activation Analysis reveal a fascinating molecular and elemental diversity.
Camille Bour‐Cardinal +5 more
wiley +1 more source
VolcanicaDespite involving no fresh magma, phreatic eruptions are increasingly found to contain juvenile material. This study seeks to determine whether the glass is the result of an input of new magma or shallow stalled magma passively entrained.
Emily Mick, Geoffroy Avard, John Stix
doaj +1 more source
The correlation of age with ΔDBPl-r and ΔD/D0.
, 2014 ΔD/D0: percentage increase in right brachial artery diameter. ΔDBPl-r: DBPl-r change following ischemia. (DBPl-r: The DBP difference between left and right arms).
Juxiang Li (508673) +7 more
core +1 more source
Counterion Dependent Side‐Chain Relaxation Stiffens a Chemically Doped Thienothiophene Copolymer
Advanced Functional Materials, EarlyView.Oxidation of a thienothiophene copolymer, p(g3TT‐T2), via different doping strategies and dopant molecules resulted in materials with similar oxidation levels and a high electrical conductivity of ≈100 S cm−1. However, mechanical properties varied significantly, with sub‐glass transition temperatures and elastic moduli spanning from –44°C to –3°C and ...
Mariavittoria Craighero +12 more
wiley +1 more source
Remote Sensing, 2023 The widely-distributed altitude effect of stable isotopes in meteoric water, i.e., the negative correlation between stable hydrogen (or oxygen) isotope compositions and altitude, is the theoretical basis of isotope paleoaltimetry in climate proxies ...
Gahong Yang +5 more
doaj +1 more source