Results 171 to 180 of about 34,873 (245)

Decadal‐Scale In Situ Scanning of a Stalagmite From Southwest China Reveals Blake Geomagnetic Excursion Structure

Geophysical Research Letters, Volume 53, Issue 2, 28 January 2026.
Abstract We present a decadal‐scale paleomagnetic analysis of a stalagmite collected from Shuixi Cave, southwest China, spanning 89−123 ka. Our findings include: (a) Magnetite is the dominant magnetic mineral, and paleomagnetic directions can be obtained via demagnetization; (b) Magnetic scanning at 0.1‐mm resolution captures key magnetic features ...
Zhongshan Shen, Youwei Li, Liang Yi, Huafeng Qin, Jian Wang, Yibing Li, Hai Cheng   +6 more
wiley   +1 more source

A High-Precision Analytical Technique for Dissolved N₂ Isotopes in Aquatic Systems: Biogeochemical Applications and Determination of Solubility Equilibrium Isotope Effects. [PDF]

Rapid Commun Mass Spectrom
McPaul K, Wankel SD, Seltzer AM.
europepmc   +1 more source

Detection of a Single Microdose of Testosterone and Recombinant EPO in Healthy Volunteers. [PDF]

Drug Test Anal
Heiland C, Hopcraft O, Johanson M, Pohanka A, Lehtihet M, Ekström L.   +5 more
europepmc   +1 more source

Site-specific hydrogen isotope measurements of vanillin by ²H-qNMR and GC-IRMS. [PDF]

Anal Bioanal Chem
Le PM, Greule M, Sokolenko S, Akoka S, Remaud G, Costa P, Isaac KS, Simpson A, Keppler F, Meija J.   +9 more
europepmc   +1 more source

Advances in steroid purification for novel techniques in carbon isotope ratio mass spectrometry of doping control. [PDF]

RSC Adv
Li Z, Cheng J, Zhao C, Chen Q, Liu B, Chen P.   +5 more
europepmc   +1 more source

Compound-Specific and Intramolecular δ¹⁵N Analysis of a Poly-Nitrogenous Amino Acid: Histidine. [PDF]

Anal Chem
Lee CWM, Altabet MA, Baca J, Barrera J, Zhang L.   +4 more
europepmc   +1 more source

Sensor Monitoring of Conveyor Working Operation with Oscillating Trough Movement. [PDF]

Sensors (Basel)
Hrabovský L, Pravda Š, Fries M.
europepmc   +1 more source

Radiocarbon Dating of Pottery Food Crusts: Reservoir Effect or not? The case of the Swifterbant pottery from Doel “Deurganckdok" [PDF]

, 2009
Boudin, Mathieu, Crombé, Philippe, Van Strydonck, Mark   +2 more
core  

Gas chromatography for analysis and estimation of ¹³C at natural abundance level in fatty acids produced from <i>Aurantiochytrium limacinum</i>, a sustainable source of polyunsaturated fatty acid. [PDF]

Front Bioeng Biotechnol
Dirir AM, Chokshi K, Ali AH, Alhanawi M, Rommala M, Hachem M.   +5 more
europepmc   +1 more source

δ(¹⁸O/¹⁶O) Determinations in Water Using Inductively Coupled Plasma-Tandem Mass Spectrometry. [PDF]

Anal Chem
Lancaster ST, Irrgeher J, Dallmayr R, Conrad E, Hörhold M, Bohleber P, Behrens M, Camin F, Žagar K, Vreča P, Prohaska T.   +10 more
europepmc   +1 more source