FRINK Linked Data Fragments server

Matches in SemOpenAlex for { <https://semopenalex.org/work/W2034335905> ?p ?o ?g. }

• W2034335905 endingPage "960" @default.
• W2034335905 startingPage "959" @default.
• W2034335905 abstract "A surface NMR investigation of groundwater in the geomagnetic field is under study. To detect the surface NMR a wire loop with a diameter of about 100 m, being an antenna for both an exciting field source and the NMR signal receiver, is laid out on the ground. A sinusoidal current pulse with a rectangular envelope is passed through the loop to excite the NMR signal. The carrier frequency of the oscillating current in this pulse is equal to the Larmor frequency of protons in the Earth's magnetic field. The current amplitude is changed up to 200 amps and the pulse duration is fixed and is equal to 40 ms. The exciting pulse is followed by an induction emf signal caused by the Larmor nuclear precession in geomagnetic field. The relaxation times T1, T2, and T2* were measured by the surface NMR for both groundwater in medium to coarse-grained sand at borehole and for bulk water under the ice surface of frozen lake. To determine T1, a longitudinal interference in experiments with repeated pulses was measured. A sequence with equal period between equal excitation pulses was used. The relaxation times T1, T2, measured for bulk water under the ice of the Ob reservoir were 1.0 s and 0.7 s, respectively. To estimate an influence of dissolved oxygen T1 of the same water at the same temperature was measured by lab NMR with and without pumping of oxygen. The relaxation time T1 measured for water in the medium to coarse-grained sand is 0.65 s. The relaxation time T2 estimated by spin echo sequence is found to be equal to 0.15 s. The relaxation time T2* is found to be about 80 ms. This result contradicts published earlier phenomenological correlation between relaxation time T2* and grain size of water-bearing rock. This could be as a result of unsound approach based on grain size or influence of paramagnetic impurities." @default.
• W2034335905 created "2016-06-24" @default.
• W2034335905 creator A5085904291 @default.
• W2034335905 date "1996-01-01" @default.
• W2034335905 modified "2023-10-06" @default.
• W2034335905 title "Surface NMR measurement of proton relaxation times in medium to coarse-grained sand aquifer" @default.
• W2034335905 cites W2031183738 @default.
• W2034335905 cites W2063286242 @default.
• W2034335905 cites W2074616155 @default.
• W2034335905 cites W2153537712 @default.
• W2034335905 doi "https://doi.org/10.1016/s0730-725x(96)00194-4" @default.
• W2034335905 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/8970122" @default.
• W2034335905 hasPublicationYear "1996" @default.
• W2034335905 type Work @default.
• W2034335905 sameAs 2034335905 @default.
• W2034335905 citedByCount "21" @default.
• W2034335905 countsByYear W20343359052013 @default.
• W2034335905 countsByYear W20343359052014 @default.
• W2034335905 countsByYear W20343359052015 @default.
• W2034335905 countsByYear W20343359052016 @default.
• W2034335905 countsByYear W20343359052017 @default.
• W2034335905 countsByYear W20343359052018 @default.
• W2034335905 countsByYear W20343359052019 @default.
• W2034335905 countsByYear W20343359052022 @default.
• W2034335905 countsByYear W20343359052023 @default.
• W2034335905 crossrefType "journal-article" @default.
• W2034335905 hasAuthorship W2034335905A5085904291 @default.
• W2034335905 hasConcept C113196181 @default.
• W2034335905 hasConcept C115260700 @default.
• W2034335905 hasConcept C120665830 @default.
• W2034335905 hasConcept C121332964 @default.
• W2034335905 hasConcept C126838900 @default.
• W2034335905 hasConcept C127313418 @default.
• W2034335905 hasConcept C143409427 @default.
• W2034335905 hasConcept C148043351 @default.
• W2034335905 hasConcept C15744967 @default.
• W2034335905 hasConcept C180205008 @default.
• W2034335905 hasConcept C182155053 @default.
• W2034335905 hasConcept C185592680 @default.
• W2034335905 hasConcept C187320778 @default.
• W2034335905 hasConcept C192562407 @default.
• W2034335905 hasConcept C199360897 @default.
• W2034335905 hasConcept C199635899 @default.
• W2034335905 hasConcept C2776029896 @default.
• W2034335905 hasConcept C2779843651 @default.
• W2034335905 hasConcept C2780167933 @default.
• W2034335905 hasConcept C41008148 @default.
• W2034335905 hasConcept C43617362 @default.
• W2034335905 hasConcept C46141821 @default.
• W2034335905 hasConcept C54516573 @default.
• W2034335905 hasConcept C5484521 @default.
• W2034335905 hasConcept C62520636 @default.
• W2034335905 hasConcept C71924100 @default.
• W2034335905 hasConcept C76177295 @default.
• W2034335905 hasConcept C77805123 @default.
• W2034335905 hasConcept C83042744 @default.
• W2034335905 hasConcept C90199342 @default.
• W2034335905 hasConcept C94915269 @default.
• W2034335905 hasConcept C97355855 @default.
• W2034335905 hasConceptScore W2034335905C113196181 @default.
• W2034335905 hasConceptScore W2034335905C115260700 @default.
• W2034335905 hasConceptScore W2034335905C120665830 @default.
• W2034335905 hasConceptScore W2034335905C121332964 @default.
• W2034335905 hasConceptScore W2034335905C126838900 @default.
• W2034335905 hasConceptScore W2034335905C127313418 @default.
• W2034335905 hasConceptScore W2034335905C143409427 @default.
• W2034335905 hasConceptScore W2034335905C148043351 @default.
• W2034335905 hasConceptScore W2034335905C15744967 @default.
• W2034335905 hasConceptScore W2034335905C180205008 @default.
• W2034335905 hasConceptScore W2034335905C182155053 @default.
• W2034335905 hasConceptScore W2034335905C185592680 @default.
• W2034335905 hasConceptScore W2034335905C187320778 @default.
• W2034335905 hasConceptScore W2034335905C192562407 @default.
• W2034335905 hasConceptScore W2034335905C199360897 @default.
• W2034335905 hasConceptScore W2034335905C199635899 @default.
• W2034335905 hasConceptScore W2034335905C2776029896 @default.
• W2034335905 hasConceptScore W2034335905C2779843651 @default.
• W2034335905 hasConceptScore W2034335905C2780167933 @default.
• W2034335905 hasConceptScore W2034335905C41008148 @default.
• W2034335905 hasConceptScore W2034335905C43617362 @default.
• W2034335905 hasConceptScore W2034335905C46141821 @default.
• W2034335905 hasConceptScore W2034335905C54516573 @default.
• W2034335905 hasConceptScore W2034335905C5484521 @default.
• W2034335905 hasConceptScore W2034335905C62520636 @default.
• W2034335905 hasConceptScore W2034335905C71924100 @default.
• W2034335905 hasConceptScore W2034335905C76177295 @default.
• W2034335905 hasConceptScore W2034335905C77805123 @default.
• W2034335905 hasConceptScore W2034335905C83042744 @default.
• W2034335905 hasConceptScore W2034335905C90199342 @default.
• W2034335905 hasConceptScore W2034335905C94915269 @default.
• W2034335905 hasConceptScore W2034335905C97355855 @default.
• W2034335905 hasIssue "7-8" @default.
• W2034335905 hasLocation W20343359051 @default.
• W2034335905 hasLocation W20343359052 @default.
• W2034335905 hasOpenAccess W2034335905 @default.
• W2034335905 hasPrimaryLocation W20343359051 @default.
• W2034335905 hasRelatedWork W141653799 @default.
• W2034335905 hasRelatedWork W2001062306 @default.

• next