showing 36 of ~574560 from 574555 documents

Leptoproduction of neutrino pairs in the nuclear coulomb field

1985

20 páginas, 6 figuras, 2 tablas.-- PACS. 13.60. - Photon and charged-lepton interactions with hadrons.

PhysicsNuclear physicsParticle physicsHigh Energy Physics::PhenomenologyCoulombHigh Energy Physics::ExperimentStandard theoryNeutrinoPolarization (waves)Lepton

The accumulation of proline in needles of damaged spruces

1985

Im Rahmen einer vergleichenden physiologischen und cytologischen Charakterisierung geschadigter und schadsymptomfreier Fichten am naturlichen Standort wurden im Spatsommer und Herbst 1984 erste Untersuchungen zum Wasserhaushalt der Baume durchgefuhrt. Messungen des Gesamtwasserpotentials, des osmotischen Potentials, des Gehaltes an verschiedenen Kohlenhydraten und an der freien Aminosaure Prolin deuten auf Veranderungen im Wasserhaushalt geschadigter Fichten. Besonders signifikante Ergebnisse waren beim Prolin zu verzeichnen. Wahrend bei den symptomfreien Fichten der Prolingehalt der Nadeln ungeachtet des Standortes und der Witterungsverhaltnisse konstant niedrig lag, trat bei Schadigung ei…

biologyChemistryBotanyForestryPicea abiesPlant Sciencebiology.organism_classificationWest germanyForstwissenschaftliches Centralblatt

Role of Natural Killer Activity in Development of Spontaneous Metastases in Murine Renal Cancer

1985

Abstract We have studied the role of natural killer activity during the growth and dissemination of a transplantable renal adenocarcinoma (Renca) of spontaneous origin in BALB/c mice. The pattern of growth of this tumor accurately mimics that of adult human renal cell carcinoma in terms of clinical stages I–IV, particularly with regard to spontaneous metastasis to lung and liver. Renca is moderately sensitive to lysis by natural killer cells from normal mice and is more efficiently lysed by natural killer cells from mice treated with the biological response modifier maleic anhydride divinyl ether, a pyran copolymer. Our studies demonstrate that selective depression of natural killer activit…

MalePathologymedicine.medical_specialtyLung NeoplasmsLysisPyran CopolymerUrologyG(M1) GangliosideGlycosphingolipidsCell LineMiceRenal cell carcinomamedicineAnimalsNeoplasm MetastasisCarcinoma Renal CellAntiserumMice Inbred BALB CLymphokine-activated killer cellLungbusiness.industryImmune SeraLiver NeoplasmsKiller activityCancermedicine.diseaseKidney NeoplasmsKiller Cells Naturalmedicine.anatomical_structureFemaleLymphbusinessNeoplasm TransplantationJournal of Urology

Herbizide, VI [1] kernfluorierte 2,4-dianilino-6-(dihexylamino)-1,3,5-triazine

1985

Zusammenfassung Auf dem Wege der nucleophilen Substitution der Chloratome in 2,4-Dichlor- 6-(dihexylamino)-1,3,5-triazin durch Anilin werden das 2,4-Dianilino-6-(dihexylamino)-1,3,5-triazin und durch fluorierte Amine die (Dihexylamino)- 1,3,5-triazine mit den folgenden Resten zuganglich: (2-Fluoranilino)-, (3-Fluoranilino)-, (4-Fluoranilino)-, (2,4-Difluoranilino)-, (2,5-Difluoranilino)- und (2,6-Difluoranilino)-. Zur Charakterisierung der neuen Verbindungen sind die IR-, 1 H-NMR- und Massenspektroskopie herangezogen worden. 2,4-Bis-(2,4-difluoranilino)-6-(dihexylamino)-1,3,5-triazin vermag insbesondere herbizide und antidiabetische Wirkungen auszuuben.

StereochemistryOrganic ChemistryNuclear magnetic resonance spectroscopyBiochemistryMedicinal chemistryInorganic Chemistrychemistry.chemical_compoundAnilinechemistry135-TriazineNucleophilic substitutionMass spectrumEnvironmental ChemistryPhysical and Theoretical ChemistryJournal of Fluorine Chemistry

Chemical structure and internal diffusion within polymer chains in the melt

1985

The single chain dynamics of polydimethylsiloxane in the melt is studied by means of quasielastic neutron scattering. For this polymer the wave vector range 0.03 A−1≦q≦0.30 A−1 covers the regime of universal modes as well as local diffusive processes. A model is described which incorporates the specific chemical structure of the macromolecule and allows to interpret our data in the full wave vector regime. The only parameter which enters the model, the monomer diffusion constantDm, is found to be (1.2±0.2)·10−5 cm2s−1.

chemistry.chemical_classificationRange (particle radiation)Materials sciencePolydimethylsiloxanePolymerNeutron scatteringCondensed Matter PhysicsElectronic Optical and Magnetic Materialschemistry.chemical_compoundMonomerchemistryChemical physicsQuasielastic neutron scatteringGeneral Materials ScienceWave vectorDiffusion (business)Zeitschrift f�r Physik B Condensed Matter

A sum-rule approach to nuclear ground state correlations

1985

By combining the sum-rule approximation to nuclear giant resonances with a generator-coordinate description of the collective ground-state we obtain a simple estimate of the collective ground-state correlations. We investigate the approach for a variety of nuclei and forces. The correlation effects are small but not negligible in view of the precision achieved in modern Skyrme-Hartree-Fock calculations.

PhysicsNuclear and High Energy PhysicsSimple (abstract algebra)Quantum mechanicsNuclear TheoryNuclear fusionSum rule in quantum mechanicsStatistical physicsVariety (universal algebra)Ground stateZeitschrift f�r Physik A Atoms and Nuclei

Effect of explosive type strength training on isometric force- and relaxation-time, electromyographic and muscle fibre characteristics of leg extenso…

1985

Eleven male subjects (20-32 years) accustomed to strength training went through progressive, high-load strength training for 24 weeks with intensities ranging variably between 70 and 120% during each month. This training was also followed by a 12-week detraining period. An increase of 26.8% (P less than 0.001) in maximal isometric strength took place during the training. The increase in strength correlated (P less than 0.05) with significant (P less than 0.05-0.01) increases in the neural activation (IEMG) of the leg extensor muscles during the most intensive training months. During the lower-intensity training, maximum IEMG decreased (P less than 0.05). Enlargements of muscle-fibre areas, …

AdultMalemedicine.medical_specialtyTime FactorsWeight LiftingPhysiologyStrength trainingMuscle RelaxationeducationNeuromuscular JunctionIsometric exerciseElectromyographyMuscle hypertrophyPhysical medicine and rehabilitationInternal medicineIsometric ContractionmedicineHumansMuscle fibreLegPhysical Education and Trainingmedicine.diagnostic_testbusiness.industryElectromyographyMusclesSkeletal muscleMuscle relaxationmedicine.anatomical_structureCardiologymedicine.symptombusinessMuscle contractionMuscle ContractionActa physiologica Scandinavica

The mainz-pouch (mixed augmentation ileum 'n zecum) for bladder augmentation and continent diversion

1985

The ideal urinary reservoir constructed from bowel material should be a low-pressure system with a high capacity, capable of preventing upper tract deterioration resulting from ureteral obstruction or reflux. It should achieve reliable control of continence and assure easy emptying of the reservoir. In the Mainz-pouch, the combination of cecum and ileum, the latter of which is able to absorb pressure waves created by the cecum, produces a low-pressure system with a high capacity immediately postoperatively. By incorporating large bowel in our pouch, ureteral implantation can be done using a simple and reliable standard antireflux technique with a submucosal tunnel. The Mainz-pouch has been …

medicine.medical_specialtyUrinary bladderbusiness.industryUrologyUrinary systemmedicine.medical_treatmentUrinary diversionInvaginationSurgeryCystectomymedicine.anatomical_structureBladder augmentationmedicinePouchbusinessContinent Urinary DiversionWorld Journal of Urology

Dynamics of a subconstituent picture of weak interactions

1985

We use sum rules in order to discuss the dynamics of the simplest subconstituent model of weak interactions with elementary spin 1/2 fermions and scalar bosons. Vacuum condensates of the scalars play an essential role and lead to features quite different from QCD. With a certain vacuum structure vector dominance of the composite W-mesons is a good approximation, and we also see a clear signal for massless fermions in the two-point function of composite fermions. Thus such a model is in good agreement with standard phenomenology. Composite Higgs particles are also investigated. The effective interaction is evidently of the gauge type.

Condensed Matter::Quantum GasesQuantum chromodynamicsPhysicsParticle physicsPhysics and Astronomy (miscellaneous)High Energy Physics::LatticeHigh Energy Physics::PhenomenologyScalar (mathematics)FermionTheoretical physicsComposite fermionHiggs bosonSum rule in quantum mechanicsEngineering (miscellaneous)Phenomenology (particle physics)BosonZeitschrift f�r Physik C Particles and Fields

The binding energy of 184 476 X in the droplet model

1985

The positron spectrum emitted in the U-U-reaction at subthreshold energy could be interpreted in terms of the formation of a giant nucleus if the binding of the latter is 100 MeV stronger than predicted by the usual droplet model parametrisation. We analyse the extrapolation to giant nuclei by accounting properly for the error propagation when the parameters are fitted to measured binding energies and radii. The influence of higher order terms is discussed.

PhysicsNuclear and High Energy PhysicsPropagation of uncertaintySubthreshold conductionNuclear TheoryBinding energyExtrapolationmedicine.anatomical_structurePositronmedicineNuclear fusionAtomic physicsNuclear ExperimentNucleusZeitschrift f�r Physik A Atoms and Nuclei

LOCAL STRUCTURE OF THE CuCu (EDTA) (H2O)2, 2H2O AMORPHOUS COMPLEX : A JOINT MAGNETIC, LAXS, AND MOLECULAR MECHANICS INVESTIGATION

1985

The short range order in the amorphous CuCu (EDTA) (H2O)2, 2H2O is studied by Large Angle X-ray Scattering (LAXS) and molecular mechanics. Three conformations of the complex molecule are shown to be energetically equivalent, two of which are simultaneously present in the amorphous material.

ChemistryChemical physics[PHYS.HIST]Physics [physics]/Physics archivesGeneral EngineeringMolecular mechanicsJoint (geology)Local structureAmorphous solid

The cardiac anxiety syndrome ? a subtype of panic attacks

1985

Cardiac anxiety syndrome and the diagnosis of cardiac neurosis respectively are characterized by panic attacks. Panic attacks are the core syndrome of a validated anxiety disorder (panic disorder). The purpose of this study was to investigate if the cardiac anxiety syndrome represents a separate disorder or if it is only a subtype of panic attacks. In a sample of 122 patients with panic attacks, all patients with a cardiac anxiety syndrome were selected (n = 31). Furthermore, parallel to this group--matched in the variables age and sex--a second group of patients with no cardiac anxiety syndrome was selected. There were no significant differences in course; in clinical phenomenology, patien…

AdultMalemedicine.medical_specialtyNeurosisPhobic avoidancebehavioral disciplines and activitiesManuals as TopicInternal medicinemental disordersmedicineHumansPharmacology (medical)Biological PsychiatryDepression (differential diagnoses)Neurocirculatory AstheniaPsychiatric Status Rating ScalesDepressive Disorderbusiness.industryGeneral NeurosciencePanic disorderPanicFearGeneral Medicinemedicine.diseasePanicPsychiatry and Mental healthNeuropsychology and Physiological PsychologyPhobic DisordersChronic Diseasecardiovascular systemAnxietyFemalemedicine.symptombusinessSomatizationAnxiety disorderClinical psychologyEuropean Archives of Psychiatry and Neurological Sciences

Influence of melatonin and serotonin on the number of rat pineal ?synaptic? ribbons and spherules in vitro

1985

Previous studies have shown that the "synaptic" ribbons (SR) and spherules (SS) of the mammalian pineal gland may respond differently under physiological and various experimental conditions. The aim of the present study was to gain insight into the mechanisms that may be responsible for the numerical changes of these organelles during a 24-h cycle. As the possibility exists that the structures are influenced by substances synthesized within the pinealocyte, rat pineal glands were cultured with and without added melatonin or serotonin, using an experimental protocol such that the addition of melatonin and serotonin mimicks the circadian changes of the respective substances within the pineal.…

MaleSerotoninendocrine systemmedicine.medical_specialtyHistologyBiologyOrgan culturePineal GlandPathology and Forensic MedicinePinealocyteMelatoninPineal glandInternal medicineOrganellemedicineAnimalsCircadian rhythmIncubationCells CulturedMelatoninRats Inbred StrainsCell BiologyRatsOrganoidsmedicine.anatomical_structureEndocrinologySynapsesSerotoninhormones hormone substitutes and hormone antagonistsmedicine.drugCell and Tissue Research

Near-surface defect profiling with slow positrons: Argon-sputtered Al(110).

1985

We report on slow-positron measurements of atomic defect distribution near a solid surface. Defects are produced by argon-ion bombardment of an Al(110) surface in ultrahigh vacuum. Defect profiles have a typical width of 15–25 Å and contain a broader tail extending to 50–100 Å. The defect density at the outermost atomic layers saturates at high argon fluences to a few atomic percent, depending on sputtering conditions. Defect production rate at >1 keV Ar+ energies is typically 1–5 vacancy-interstitial pairs per incident ion. Molecular-dynamics simulations of the collision cascade predict similar defect distributions. Peer reviewed

Surface (mathematics)Profiling (computer programming)solid surfacesPositronMaterials scienceArgonchemistryPhysicsPhysics::Atomic and Molecular Clusterschemistry.chemical_elementslow positronsAtomic physicsPositron annihilationPhysical review. B, Condensed matter

High resolution spectroscopy of rydberg states in indium I

1985

Two-photon laser spectroscopy in a dense indium vapour allowed to investigatenp2P1/2, 3/2 states (n=27–35) for113, 115In with a thermionic diode. Precise data on the fine structure splitting of these states and the isotope shift of the two photon transitions have been obtained. The fine structure splitting shows a hydrogenic behaviour. By using the result of our isotope shift measurement in combination with literature values, level isotope shifts with reference to the ionization limit are deduced and analysed with respect to the different contributions.

PhysicsNuclear and High Energy Physicschemistry.chemical_elementMolecular electronic transitionsymbols.namesakechemistryIonizationRydberg formulasymbolsFine structureAtomic physicsRydberg stateSpectroscopyHyperfine structureIndiumZeitschrift f�r Physik A Atoms and Nuclei

Modulation of oestrogen excretion profiles by adjuvant chemotherapy in pre- and postmenopausal breast cancer.

1985

Modulation of steroid status by conventional chemotherapy was studied in 31 breast cancer patients receiving CMF and in 31 age-matched breast cancer patients without any therapy, taken as controls. This was achieved through the study of oestrogen excretion profiles using previously identified parameters and referring not only to classical but also to the “other”, namely catechol and unusual, oestrogen metabolites. After CMF treatment the premenopausal patients exhibit a modified excretion pattern, mainly concerning a marked and significant reduction of classical oestrogens, as shown by pattern indices. Because there is evidence that oestriol metabolism is not markedly affected by CMF treatm…

Adultmedicine.medical_specialtyTime FactorschlormethineAdjuvant chemotherapymedicine.medical_treatmentBreast NeoplasmsBiochemistryestriolGas Chromatography-Mass SpectrometrySteroidExcretionEndocrinologyBreast cancerInternal medicineestradiolAntineoplastic Combined Chemotherapy ProtocolsmedicineestrogenHumansStage (cooking)CyclophosphamideChromatography High Pressure LiquidAgedbusiness.industryEstrogensMetabolismMiddle Agedmedicine.diseaseestroneEstrogens CatecholEndocrinologyMethotrexateMetabolic rateAdrenal CortexFemaleFluorouracilMenopausebusinessAfter treatmentJournal of steroid biochemistry

The effects of racemic bethanechol and its (R)- and (S)-enantiomers on pre- and postjunctional muscarine receptors in the guinea-pig ileum

1985

The effect of racemic bethanechol and its (R)- and (S)-enantiomers on smooth muscle contraction and outflow of [3H]-acetylcholine were studied in the guinea-pig myenteric plexus-longitudinal muscle preparation that had been preincubated with [3H]-choline. (S)-, racemic, and (R)-bethanechol caused concentration-dependent contractions of the longitudinal muscle. The potency ratio of the strong isomer (S) to the weak one (R) was 915. Racemic and (S)-bethanechol concentration-dependently inhibited the evoked outflow of [3H]-acetylcholine. Racemic bethanechol was more potent than (S)-bethanechol. (R)-bethanechol up to a concentration of 1 mM did no affect the evoked outflow of [3H]-acetylcholine…

MaleStereochemistryGuinea PigsMyenteric PlexusBethanecholchemistry.chemical_compoundBethanechol CompoundsIleumMuscarinic acetylcholine receptormedicineAnimalsPharmacologyMuscarineChemistryMuscle SmoothStereoisomerismGeneral MedicineSmooth muscle contractionBethanecholReceptors MuscarinicRacemic mixtureFemaleCholinesterase InhibitorsEnantiomermedicine.symptomAcetylcholineMuscle Contractionmedicine.drugMuscle contractionNaunyn-Schmiedeberg's Archives of Pharmacology

Nuclear moments and charge radii of105, 106In

1985

With high resolution collinear fast beam laser spectroscopy in the 451 nm-line of Indium nuclear moments and the change in the mean square radii of the nuclear charge distribution of105,106 In have been determined.

Mean squarePhysicsNuclear and High Energy PhysicsNuclear Theorychemistry.chemical_elementHigh resolutionCharge (physics)Effective nuclear chargeDistribution (mathematics)chemistryNuclear fusionAtomic physicsNuclear ExperimentSpectroscopyIndiumZeitschrift f�r Physik A Atoms and Nuclei

Über die Darstellung affiner Ketten als Normkurven

1985

Pure mathematicsNumber theoryDifferential geometryGeneral MathematicsAlgebra over a fieldTopology (chemistry)MathematicsAbhandlungen aus dem Mathematischen Seminar der Universität Hamburg

Complete amplitude and cross section structure of one-loop contributions toe + e ??q $$\bar q$$ g

1985

We calculate theO(α 2 ) one-loop contributions to the seven (inn≠4) independent invariant amplitudes describinge + e −→q $$\bar q$$ g in massless QCD. After folding with theO(α 1/2 ) Born term contribution we obtain the nine independentO(α 2 ) structure functions that describe the parity-conserving and parity-violating contributions toe + e −→q $$\bar q$$ g. We use dimensional regularization to control infrared and ultraviolet divergencies.

Quantum chromodynamicsPhysicsPhysics and Astronomy (miscellaneous)Bar (music)High Energy Physics::PhenomenologyElementary particleMassless particleLoop (topology)Dimensional regularizationAmplitudeQuantum mechanicsHigh Energy Physics::ExperimentInvariant (mathematics)Engineering (miscellaneous)Mathematical physicsZeitschrift f�r Physik C Particles and Fields

Nuclear Magnetic Moment ofTl207

1985

The magnetic moment 1.876(5)${\mathrm{\ensuremath{\mu}}}_{\mathit{N}}$ of 4.77-min $^{207}\mathrm{Tl}$, the only heavy nucleus with a doubly magic core plus a single ${s}_{\frac{1}{2}}$ particle or hole, was measured from the hfs by collinear fast-beam laser spectroscopy at ISOLDE (isotope separator at the CERN synchrotron). The result is of theoretical importance as a test case for core polarization since the nuclear structure is relatively simple and the orbital part of the magnetic moment, including strong pion-exchange contribution, is expected to be zero.

PhysicsMagnetic momentSHELL modelNuclear structureGeneral Physics and AstronomyPolarization (waves)Synchrotronlaw.inventionNuclear physicslawNuclear magnetic momentAtomic physicsNuclear ExperimentSpectroscopyHyperfine structurePhysical Review Letters

High-performance liquid chromatography with fluorimetric detection in biological tissues of the 4-bromomethyl-7-methoxycoumarin ester derivative of 5…

1985

MaleChemical PhenomenaMetaboliteCarboxylic acidPeptideKidneyHigh-performance liquid chromatographyMicechemistry.chemical_compoundDrug StabilityAnimalsUmbelliferonesChromatography High Pressure LiquidBrain Chemistrychemistry.chemical_classificationChromatographyGeneral ChemistryGlutamic acid4-bromomethyl-7-methoxycoumarinPyrrolidinonesPyrrolidonecarboxylic AcidChemistrySpectrometry FluorescenceLiverchemistryIndicators and ReagentsDerivative (chemistry)Journal of Chromatography B: Biomedical Sciences and Applications

L'orientation en fin de cinquième : faut-il un système aussi centralisé, compte-tenu d'une telle variété de pratiques ?

1985

International audience

CentralisationOrientation scolaire[SHS.EDU]Humanities and Social Sciences/Education[SHS.EDU] Humanities and Social Sciences/EducationCinquièmeEnseignement secondaireFranceDécentralisationProcédureComputingMilieux_MISCELLANEOUS

Muscular strength profiles and anthropometry in random samples of men aged 31–35, 51–55 and 71–75 years

1985

Maximal isometric muscular strength and anthropometric characteristics were studied among three random samples each containing about 180 Finnish men belonging to three generation cohorts, and having a mean age of 32·9 ± 1·4, 53·1 ± 1·5 and 72·7± 1·4 years. Strength was measured on special dynamometers for grip, trunk and knee extension and trunk and elbow flexion. The anthropometric characteristics included body height, weight, body-mass index, skeletal weight, fat weight and a weight factor. The youngest cohort had the highest and the oldest cohort the lowest values for strength as well as body height and fat-free body weight, while the middle-aged group had the highest and the youngest gr…

Orthodonticsmedicine.medical_specialtyBody heightbusiness.industryPhysical Therapy Sports Therapy and RehabilitationHuman Factors and ErgonomicsIsometric exerciseAnthropometryPhysical strengthTrunkGrip strengthCohortCorrelation analysisPhysical therapymedicinebusinessErgonomics

L'ajustement de trends logistiques

1985

Ajustement : Cycle[ SHS.ECO ] Humanities and Social Sciences/Economies and financesLogistique[SHS.ECO]Humanities and Social Sciences/Economics and Finance[SHS.ECO] Humanities and Social Sciences/Economics and Finance

Application of a radiative cooling model to daily minimum temperature prediction

1985

A model of exponential decrease of temperature is applied to the study of night cooling in an agricultural area of citrus orchards located near the Valentian Coast (Spain). A set of annual average parameters which determine that cooling is obtained by using temperature measurements at different levels during two years. These parameters appear to be representative of the thermal behaviour of the area of study. The attainment of such parameters allows a prediction of the minimum temperatures of the area to an accuracy of £1.5 K, knowing the temperature at sunset and some time later.

Radiative coolingMeteorologyClimatologyAir temperatureThermalAnnual averageGeneral Earth and Planetary SciencesEnvironmental scienceSunsetAtmospheric sciencesTemperature measurementGeneral Environmental ScienceExponential functionJournal of Climatology

Techniques for the measurement ofg-factors of nuclear states, their merits, limitations, sensitivity, etc.

1985

PhysicsNuclear and High Energy PhysicsSensitivity (control systems)Physical and Theoretical ChemistryCondensed Matter PhysicsBiological systemAtomic and Molecular Physics and OpticsHyperfine Interactions

Thermodynamic predictions of the formation of chalcogenide glasses

1985

The understanding of glass forming ability requires quantitative information on the stable and metastable phase equilibria of binary and multicomponent systems, particularly as a function of composition and temperature. This paper discusses the success of the use of Gibbs free energy curves for the supercooled liquid relative to the stable crystalline phases to describe glass forming ability. Applications are reported for the systems GeSe2-Se, Sb2Se3-Se and GeSe2-Sb2Se3 for which experimental minimal quenching rates are available. A strongly associated regular solution model for the liquid phase gives a predicted behaviour consistent with experimental data. The method is intended to apply t…

QuenchingMaterials scienceChalcogenideMechanical EngineeringRegular solutionThermodynamicsCondensed Matter::Disordered Systems and Neural NetworksGibbs free energyCondensed Matter::Soft Condensed Matterchemistry.chemical_compoundsymbols.namesakechemistryMechanics of MaterialsMetastabilityPhase (matter)Solid mechanicssymbolsGeneral Materials ScienceSupercoolingJournal of Materials Science

Bismuth trihalide complexes with nitrogen and phosphorus chelating ligands

1985

Abstract Bismuth(III) halides react with 1,10-phenanthroline, 2-pyridinecarboxaldehyde-2-pyridylhydrazone and diphenylphosphynoethane in methanol. A stoichiometry differing from 1:1 is found only for BiCl 3 (Phen) 1.33 and BiCl 3 (Dpe) 1.5 . Characterization of these compounds, which are not very soluble in common solvents, follows from analytical, mass and IR spectral data. In the low frequency region, the IR spectra proved to be useful to ascertain the presence of bridging halogens.

Inorganic chemistryTrihalideHalidechemistry.chemical_elementInfrared spectroscopyBismuthInorganic Chemistrychemistry.chemical_compoundchemistryHalogenMaterials ChemistryMass spectrumMethanolPhysical and Theoretical ChemistryStoichiometryInorganica Chimica Acta

Interaction Between Uridine and GABA-Mediated Inhibitory Transmission: Studies In Vivo and In Vitro

1985

Na+-independent [3H]gamma-aminobutyric acid (GABA) binding to membrane preparations from frontal cortex, hippocampus, and thalamus is competitively inhibited by the in vitro addition of a naturally occurring pyrimidinic compound, uridine. Moreover, the intraperitoneal injection of uridine produces a dose-related decrease in the cerebellar content of cyclic GMP and antagonizes its increase elicited by bicuculline. The pyrimidinic compound also shows an antagonism toward bicuculline-induced seizures. The relationship between the anti-convulsant actions of uridine and GABA-mediated inhibitory neurotransmission is discussed in terms of an activation of GABA receptor function by the naturally oc…

MaleSynaptic MembranesNeurotransmissionPharmacologyBicucullineInhibitory postsynaptic potentialHippocampusSynaptic Transmissiongamma-Aminobutyric acidchemistry.chemical_compoundThalamusGABA receptorSeizuresIn vivomedicineAnimalsCyclic GMPUridinegamma-Aminobutyric AcidNeurotransmitter AgentsBicucullineReceptors GABA-AUridineIn vitroFrontal LobeRatsnervous systemNeurologychemistryBiochemistryNeurology (clinical)medicine.drugEpilepsia

Temperature controller for brain slice chambers using a current sink output stage.

1985

Temperature controlMaterials scienceBiomedical EngineeringTemperatureBrainHuman physiologyEquipment DesignThermostatHippocampusComputer Science Applicationslaw.inventionRatsSlice preparationlawControl theoryAnimalsStage (hydrology)Current (fluid)Sink (computing)Medicalbiological engineeringcomputing

Relationship between the acid and limonin content of Washington Navel orange juices

1985

Juice samples of Washington Navel oranges from three groves were analysed for limonin, °Brix and acid during several seasons. A strong correlation between limonin and acid content has been found.

Acid contentOrange juiceNutrition and DieteticsbiologyLimoninbiology.organism_classificationchemistry.chemical_compoundHorticultureRutaceaechemistryBiochemistryStatistical analysisNavel orangeAgronomy and Crop ScienceCitrus × sinensisFood ScienceBiotechnologyJournal of the Science of Food and Agriculture

The influence of alcohol on cognitive conflict.

1985

The influence of alcohol on cognitive conflict between individuals was studied by means of an experiment that was designed to be representative of real life negotiating situations, where alcohol is consumed and where two parties are required to find new common solutions to problems that they have previously learned to solve differently by themselves. The subjects were 60 male students of technology divided into experimental and control groups. The amount of alcohol (whisky) consumed by the experimental subjects produced approximately 0.08% blood alcohol concentration. In the experiment, the cognitive conflict situation was created by first training subjects to solve diagnostic medical tasks…

AdultMaleAdolescentmedia_common.quotation_subjectControl (management)Decision MakingAlcoholDevelopmental psychologyConflict Psychologicalchemistry.chemical_compoundJudgmentCognitionBlood alcoholmedicineHumansInterpersonal RelationsTrained subjectsProblem Solvingmedia_commonPharmacologyEthanolCognitive disorderCognitionmedicine.diseaseSocial situationAggressionNegotiationchemistryPsychologySocial psychologyPsychopharmacology

Electrical stimulation of glossopharyngeal nerve and oesophageal EMG response in the pigeon

1985

The effects of the efferent glossopharyngeal nerve stimulation, on EMG activity of the pigeon cervical oesophagus, were studied. In control animals, stimulation caused a biphasic response characterized by an intra-stimulus excitatory component followed by a post-stimulus inhibitory one. The EMG response to glossopharyngeal stimulation appeared simultaneously throughout the cervical oesophagus. A bell-shaped mechanical wave was detected relating to the electrical excitatory component. Atropine administration antagonized the excitatory component, while the inhibitory one persisted. It occurs intra-stimulus, and its duration is increased, compared to control ones. A reduction in the oesophagea…

AtropinePhysiologyEfferentStimulationHexamethonium CompoundsElectromyographyIn Vitro TechniquesInhibitory postsynaptic potentialBiochemistrychemistry.chemical_compoundEsophagusmedicineAnimalsColumbidaeGlossopharyngeal Nervemedicine.diagnostic_testElectromyographybusiness.industryElectric Stimulationmedicine.anatomical_structurechemistryPeripheral nervous systemAnesthesiaGlossopharyngeal nerveExcitatory postsynaptic potentialHexamethoniumbusinessArchives Internationales de Physiologie et de Biochimie

Regulatory features of glycogen phosphorylase from frog brain (Rana temporaria)

1985

1. Glycogen content and the activity of glycogen phosphorylase (GPase) are much higher in brain tissue of the Common frog (Rana temporaria) than in brain tissue of mammals and birds (Table 1). 2. In phosphate buffer GPase is extracted from frog orain in a form completely active without addition of AMP and has therefore to be regarded as phosphorylase a. Several procedures to extract the b-form of the enzyme from the tissue have been unsuccessful. In resting skeletal muscle predominantly the AMP dependent b-form is present (Table 1). 3. In vitro, however, the existence of the complete interconverting system can be demonstrated. If NaF (a phosphatase inhibitor) was omitted from the homogeniza…

chemistry.chemical_classificationGlycogenPhysiologySkeletal muscleMetabolismBiologyBiochemistryGlycogen phosphorylasechemistry.chemical_compoundEndocrinologymedicine.anatomical_structureEnzymechemistryBiochemistrymedicineGRENOUILLEAnimal Science and ZoologyProtein phosphorylationEcology Evolution Behavior and SystematicsHomogenization (biology)Journal of Comparative Physiology B

Hepatocellular carcinoma after thorotrast exposure: establishment of a new cell line (Mz-Hep-1).

1985

A human hepatoma cell line, associated with thorotrast exposure, from an hepatitis B marker-negative patient was established as a permanent cell line (Mz-Hep-1) in tissue culture. Histology of the primary tumor, as well as phase contrast, transmission and scanning electron microscopy of the cultured cells showed typical characteristics of liver cells. Mz-Hep-1 cells secreted complement components (C2, C3, C4), carcinoembryonic antigen, lactate dehydrogenase, chymotrypsin, haptoglobin and retinol-binding protein and expressed HLA-, transferrin-, blood group B-related determinants and complement component C5 and carcinoembryonic antigen on their cell surface. Mz-Hep-1 cells represent the firs…

Pathologymedicine.medical_specialtyCarcinoma HepatocellularCellHuman leukocyte antigenCell Linechemistry.chemical_compoundTissue cultureCarcinoembryonic antigenLactate dehydrogenasemedicineHumansHepatitis B e AntigensHepatitis B Surface AntigensHepatologybiologyCell CycleLiver NeoplasmsAngiographyComplement System ProteinsCell cycleMiddle Agedmedicine.diseaseMolecular biologyCarcinoembryonic Antigenmedicine.anatomical_structurechemistryCell cultureHepatocellular carcinomaKaryotypingbiology.proteinMicroscopy Electron ScanningFemaleThorium Dioxidealpha-FetoproteinsHepatology (Baltimore, Md.)