Results 131 to 140 of about 6,159 (234)

Stable Nitrogen Isotope Analysis of Amino Acids by Orbitrap Mass Spectrometry: Application for Extraterrestrial Samples. [PDF]

Rapid Commun Mass Spectrom
McIntosh OM, Baczynski AA, Matney M, McLain HL, Farnsworth KK, Dworkin JP, Glavin DP, Elsila JE, Xie H, Freeman KH.   +9 more
europepmc   +1 more source

Stable Isotope Analysis (δ13C and δ15N) of Baleen Plates Reveals Feeding Patterns in Stranded Humpback Whales (Megaptera novaeangliae) Along the Brazilian Coast

Marine Mammal Science, Volume 42, Issue 3, July 2026.
ABSTRACT Humpback whales (Megaptera novaeangliae) from breeding stock A migrate annually between Antarctic feeding grounds (~65° S) and Brazilian breeding areas (~17° S). Traditionally considered to fast during migration, recent feeding observations and increased strandings along southeastern Brazil (~23° S) raise questions about possible shifts in ...
Daniel Fonseca Zappa, Kalil Salloum, Nandhara Alexandrini Martins, Carla Bantel, Andrea Maranho, Carla Beatriz Barbosa, Francisco William da Cruz Júnior, Adriana Barioni, Gislene Torrente‐Vilara   +8 more
wiley   +1 more source

Coupling Liquid Chromatography to Orbitrap Isotope Ratio Mass Spectrometry: Overcoming Isotope Effects of Chromatography and Amount-Dependency by Peak Homogenization. [PDF]

Anal Chem
Canavan A, Prechtl L, Al-Ghoul H, Kuhlbusch N, Erhardt AM, Elsner M.   +5 more
europepmc   +1 more source

Skeletal Muscle Mass Is Independently Associated With Water Turnover in Male Athletes

Scandinavian Journal of Medicine &Science in Sports, Volume 36, Issue 7, July 2026.
ABSTRACT Fat‐free mass (FFM) is a key component of body composition that contributes moderately to water turnover (WT). However, FFM consists of multiple components, and the extent of its contribution to WT, especially in relation to skeletal muscle mass (SMM) in athletes, remains unclear. This study aimed to examine the association between WT and body
Hiroyuki Sagayama, Yoko Tanabe, Akiko Uchizawa, Suraiya Khatun, Keisuke Shiose, Rie Tomiga‐Takae, Jun Yasukata, Yasuki Higaki, Takahiro Ohnishi, Hideyuki Takahashi, Yosuke Yamada, Analiza M. Silva, Emi Kondo   +12 more
wiley   +1 more source

Analysis of 13C Enrichment of Vitamin A in Biological Samples by Gas Chromatography-Combustion-Isotope Ratio Mass Spectrometry. [PDF]

J Vis Exp
Gannon BM, Davis CR, Chen H, Tanumihardjo SA.   +3 more
europepmc   +1 more source

Fluid‐Induced Magnetic Enhancement in Sandstone Friction Experiments: Implications for Coseismic Fault Temperature Estimates

Geophysical Research Letters, Volume 53, Issue 11, 16 June 2026.
Abstract Constraining peak temperature during seismic slip is essential for quantifying earthquake energy budgets and fault weakening. Rock magnetic methods provide a sensitive means of estimating shear‐induced coseismic temperature rise; however, the role of fluids in friction‐induced magnetic alterations remains poorly constrained.
Qiang Fu, Mark J. Dekkers, Simo Spassov, Derya Gürer, Chien‐Cheng Hung, Job P. B. Arts, André R. Niemeijer   +6 more
wiley   +1 more source

Stable Carbon Isotope Analysis of Perfluorooctanoic Acid (PFOA) by Microflow-High Pressure Liquid Chromatography-Orbitrap Mass Spectrometry. [PDF]

Rapid Commun Mass Spectrom
Wojtal PK, Davidheiser-Kroll B, Lane CS, Mead RN.   +3 more
europepmc   +1 more source

Late Carboniferous Paleomagnetism From North Qiangtang Block Reveals a Multibranched Paleo‐Tethys Ocean

Geophysical Research Letters, Volume 53, Issue 11, 16 June 2026.
Abstract The North Qiangtang Block occupies a pivotal position within the eastern Tethyan realm, and its paleogeographic reconstruction is critical for constraining Tethyan geometry and evolution. However, its Late Paleozoic paleogeography and Paleo‐Tethyan Ocean–continent configuration remain controversial due to limited reliable age‐constrained ...
Jiahui Zhang, Xin Cheng, Zhongshan Shen, Daniel Pastor‐Galán, Bitian Wei, Longyun Xing, Dongmeng Zhang, Nan Jiang, Mengting Zhong, Shuqi Lan, Muhammad Rizwan, Chenglong Deng, Hanning Wu   +12 more
wiley   +1 more source

Uncertainties in Calibration of an Optical Spectrometer for Measuring Isotope Ratios in Methane. [PDF]

ACS Meas Sci Au
Rennick C, Safi E, Hillier A, Hopkinson E, Hill-Pearce RE, Arnold T.   +5 more
europepmc   +1 more source

Thermal Desorption Gas Chromatography-Mass Spectrometry Methods for Minimally Invasive Organic Residue Analysis of Archeological Potsherds. [PDF]

Anal Chem
Geddes da Filicaia E, Maule CA, Nixon A, Peggie DA, Bull ID, Evershed RP, Roffet-Salque M.   +6 more
europepmc   +1 more source