Search results for "Star"

showing 10 items of 4285 documents

Communication: Rotational excitation of interstellar heavy water by hydrogen molecules

2010

Cross sections and rate coefficients for low lying rotational transitions in D(2)O induced by para-H(2) collisions are presented for the first time. Calculations have been performed at the close-coupling level with the deuterated variant of the H(2)O-H(2) interaction potential of Valiron et al. [J. Chem. Phys. 129, 134306 (2008)]. Rate coefficients are presented for temperatures between 1 and 30 K and are compared to the corresponding rate coefficients for H(2)O. Significant differences caused by the isotopic substitution are observed and are attributed to both kinematics and intramolecular geometry effects. Astrophysical implications are briefly discussed in view of the very recent detecti…

Heavy waterAstrochemistry010304 chemical physicsChemistryStar formationHydrogen moleculeGeneral Physics and Astronomy01 natural sciencesSpace observatorychemistry.chemical_compoundDeuterium13. Climate actionIntramolecular force0103 physical sciencesPhysics::Chemical PhysicsPhysical and Theoretical ChemistryAtomic physics010303 astronomy & astrophysicsAstrophysics::Galaxy AstrophysicsExcitationComputingMilieux_MISCELLANEOUS
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Helicobacter pylori - diagnostika izmantojot 13C urīnvielas elptestu un seroloģijas testu: rezultātu salīdzināšana

2017

Ievads. 2012.gada veiktajā pētījumā tika iegūti dati, ka Latvijā Helicobacter Pylori (HP) izplatība pieaugušo populācijā ir augstā līmenī – 79.21%. Prezentētajā pētījumā tika analizēta HP infekcijas izplatība saistībā ar sociāli-demogrāfiskiem faktoriem - dalībnieku izglītības līmeni, nodarbinātību, vidējiem ienākumiem, ģimenes stāvokli, smēķēšanas paradumiem Latvijas iedzīvotājiem. Pētījuma mērķis. HP testu, kuri veikti izmantojot 13C urīnvielas elptestu un seroloģijas testu Daudzcentru randomizēts pētījums kuņģa vēža izraisītās mirstības samazināšanai (GISTAR) pētījuma ietvarā, rezultātu salīdzināšana saistībā ar sociāli-demogrāfiskiem faktoriem. Materiāli un metodes. Darbs ir šķērsgriezu…

Helicobacter pyloriDaudzcentru randomizēts pētījums kuņģa vēža izraisītās mirstības samazināšanai (GISTAR).Seroloģijas tests13C urīnvielas elptestsMedicīna
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Sankariksi sanomalehdessä : diskurssianalyysi jalkapallon MM-kisojen 2006 urheilusankaruuksien rakentumisesta Helsingin Sanomissa ja Die Weltissä

2009

Helsingin sanomat (sanomalehti)urheilujournalismijalkapalloDie Welt (sanomalehti)metaforaDiskurssianalyysisankaruusmaailmanmestaruuskisat
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Helēnas Ledus - Starcas herbāriji

2022

Raksts par Helēnas Ledus-Starcas (1915 – 2005) herbārijiem Herbarium Latvicum (RIG II), kas glabājas Latvjas Universitātes Muzeja Botānikas un mikoloģijas kolekcijās.

Helēna LedusHelēna StarcaHerbarium Latvicumbotānika:NATURAL SCIENCES::Biology::Organism biology::Plant physiology [Research Subject Categories]botany:HUMANITIES and RELIGION::History and philosophy subjects::History subjects::History of science [Research Subject Categories]Latvijas flora
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Helēnas Ledus dzimtenes mīlestība

2022

Raksts par latviešu botāniķes Helēnas Ledus-Starcas (1915 – 2005) dzīvi, zinātnisko un sabiedrisko darbību.

Helēna LedusHelēna StarcaRietumzemgales floraIndianpolisbotānikabotany:HUMANITIES and RELIGION::History and philosophy subjects::History subjects::History of science [Research Subject Categories]
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Acs struktūru novērtēšana ar spektroskopijas metodi

2016

Darba mērķis ir pārbaudīt metodi neinvazīvai dažādu vielu un to koncentrācijas noteikšanai asinīs, izmantojot UV un VIS spektrometriju. Darbā apskatīta iespēja ar atstarošanās spektrometrijas metodi noteikt hromoforu (hemoglobīnu) un skābekļa koncentrāciju asinīs, izmantojot acs konjunktīvas asinsvadus. Darba laikā uzņemti vairāki vielu references spektri, veikta acs modeļa izveide un izpēte dažādu spektrometrijas metožu pielietošanai acs struktūru izpētē. Uzņemti dzīvas acs ābola konjunktīvas spektrs, izdalītas hromoforas un noteikta to koncentrācija. Darbā veikta vienkāršota nezināmās vielas noteikšanas simulācija, izmantojot fluorescīna krāsvielu. Darbā pierādīts, ka ar atstarojošās spek…

HemoglobīnsSkābekļa saturācijaFizikaAcsAtstarošanās spektrometrija
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Anti-rat liver microsomal and cytosolic antibodies in hepatitis C virus infection.

1994

In order to assess the frequency of autoimmunity markers in hepatitis C virus infection, 229 RIBA 2 HCV positive individuals were tested by ELISA and Immunoblot assay using as antigen rat liver microsomal and cytosolic proteins. Twenty-one out of 229 individuals (9%) showed anti-rat liver microsome antibodies by ELISA, but the titre was low (1:100 to 1:1,600). In Immunoblot, only 5 of these 21 ELISA positive sera recognized also rat liver microsomal proteins (MW between 30 to 64 kDa). Antibodies against rat liver cytosolic proteins were found by ELISA in 14 out of 229 individuals (6%). Three of them showed a reactivity in Immunoblot to 42 kDa or 55 kDA proteins. In conclusion, HCV infection…

Hepatitis C virusImmunologyImmunoblottingEnzyme-Linked Immunosorbent AssayAutoimmune hepatitismedicine.disease_causeVirusAutoimmunityCytosolAntigenmedicineImmunology and AllergyAnimalsHumansRats WistarAutoantibodiesAutoimmune diseasebiologyAutoantibodymedicine.diseaseVirologyHepatitis CRatsLiverbiology.proteinMicrosomes LiverFemaleAntibodyAutoimmunity
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Putative role of cationic amino acid transporter‐3 in murine liver metabolism

2015

HepatologybiologyChemistryLipid metabolismFastingMetabolismLipid MetabolismMolecular biologyFatty LiverLiver metabolismLiverBiochemistryStarvationbiology.proteinAmino Acid Transport Systems BasicAnimalsHumansMurine liverCATIONIC AMINO ACID TRANSPORTER 3Hepatology
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VLTI/AMBER spectro-interferometry of the late-type supergiants V766 Cen (=HR 5171 A), σ Oph, BM Sco, and HD 206859

2017

Aims. We add four warmer late-type supergiants to our previous spectro-interferometric studies of red giants and supergiants. Methods. We measure the near-continuum angular diameter, derive fundamental parameters, discuss the evolutionary stage, and study extended atmospheric atomic and molecular layers. Results. V766 Cen (=HR 5171 A) is found to be a high-luminosity (log L/L = 5.8 ± 0.4) source of effective temperature 4290 ± 760 K and radius 1490 ± 540 R, located in the Hertzsprung-Russell (HR) diagram close to both the Hayashi limit and Eddington limit; this source is consistent with a 40 M evolutionary track without rotation and current mass 27-36 M. V766 Cen exhibits Na i in emission a…

Hertzsprung–Russell diagramindividual: BM Sco [Stars]FOS: Physical sciencesAstrophysics01 natural sciencesLuminositysymbols.namesake0103 physical sciencesStars: individual: BM ScoRed supergiantStars: mass-lossYellow hypergiantatmospheres [Stars]010303 astronomy & astrophysicsSolar and Stellar Astrophysics (astro-ph.SR)Physicsmass-loss [Stars]010308 nuclear & particles physicsAstronomy and AstrophysicsEffective temperatureStars: individual: V766 CenAstrophysics - Solar and Stellar AstrophysicsSupergiantsSpace and Planetary ScienceEddington luminosityTechniques: interferometricsymbolsCircumstellar dustinterferometric [Techniques]individual: V766 Cen [Stars]Stars: atmospheresSupergiant
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Identification in the rat brain of a set of nuclear proteins interacting with H1° mRNA

2012

Synthesis of H1° histone, in the developing rat brain, is also regulated at post-transcriptional level. Regulation of RNA metabolism depends on a series of RNA-binding proteins (RBPs); therefore, we searched for H1° mRNA-interacting proteins. With this aim, we used in vitro transcribed, biotinylated H1° RNA as bait to isolate, by a chromatographic approach, proteins which interact with this mRNA, in the nuclei of brain cells. Abundant RBPs, such as heterogeneous nuclear ribonucleoprotein (hnRNP) K and hnRNP A1, and molecular chaperones (heat shock cognate 70, Hsc70) were identified by mass spectrometry. Western blot analysis also revealed the presence of cold shock domain-containing protein…

Heterogeneous nuclear ribonucleoproteinRNA-binding proteinRNA-binding proteinBiologyenvironment and public healthHeterogeneous-Nuclear RibonucleoproteinsMass SpectrometryHistonesSettore BIO/10 - BiochimicaAnimalsRNA MessengerNuclear proteinRats WistarSettore BIO/06 - Anatomia Comparata E CitologiaRibonucleoproteinMessenger RNAPIPPinGeneral NeuroscienceRibonucleoprotein particleHSC70 Heat-Shock ProteinsRNABrainCSD-C2Molecular biologyCell biologyRatsHistonebiology.proteinH1° mRNAPost-transcriptional gene regulation
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