| correlation between cardiac muscle myosin atpase activity and velocity of muscle shortening. | | 1979 | 159043 |
| electron microscopic autoradiography and cytochemistry of sulfated mucopolysaccharides in developing bone and cartilage of young cats. | | 1978 | 159137 |
| the cardiac hypertrophy process. analyses of factors determining pathological vs. physiological development. | | 1979 | 159142 |
| role of environment in the development of "natural" hemagglutinins in minnesota miniature swine. | "natural" hemagglutinin titers against a panel of fixed erythrocyte antigens were determined for groups of minnesota miniature swine reared conventionally, in a specific pathogen-free facility, and in germfree isolators. sera were assayed for hemagglutination (ha) titers by the microtiter method against 12 species of erythrocytes stabilized by treatment with pyruvic aldehyde and formaldehyde. these erythrocytes were stable for up to 2 years and gave slightly enhanced ha titers as compared to fre ... | 1979 | 159262 |
| kinetic properties of calcium adenosine triphosphatase of sarcoplasmic reticulum isolated from cat skeletal muscles. a comparison of caudofemoralis (fast), tibialis (mixed), and soleus (slow). | | 1979 | 159295 |
| methods used to compare monosynaptic and multisynaptic projection of spindle afferents to jaw elevator motoneurones of different types [proceedings]. | | 1979 | 159355 |
| autogenetic inhibition of motoneurones by impulses in group ia muscle spindle afferents. | 1. inhibitory post-synaptic potentials evoked by adequate stimulation of group ia muscle spindle afferents of homonymous and synergistic muscles and by selective electrical stimulation of tendon organ afferents were analysed in motoneurones of triceps surae and plantaris. 2. selective activation of ia afferents was verified to occur with brief stretches of triceps surae and plantaris 35 micrometer or less in amplitude with an initial muscle tension of 5 n; stretches of 30--35 micrometer were est ... | 1979 | 159356 |
| sensory innervation of cat hind-limb muscle spindles [proceedings]. | | 1979 | 159358 |
| [comparative morphological studies of the structure of the articular disk of the temporomandibular joint]. | articular disks (da) of mandibular articulations of several types of animals of different ages and both sexes (herbivora, carnivora, rodents and omnivora) were studied. comparative macroscopy emphasized similarities with the da of humans and other omnivora, as well as some peculiarities. da is ellyptical in herbivora; its upper surface is divided into two facets by a transversal crest. da is pinkish and square in carnivora; its posterior part is lacking. da is half-moonish and white-nacreous in ... | 1979 | 159402 |
| the effect of surgical sympathectomy and of neonatal treatment with 6-hydroxydopamine and guanethidine on particle-bound noradrenaline and 35s-sulphomucopolysaccharides. | five to six weeks after bilateral stellate ganglionectomy, noradrenaline (na) levels in cats' atria were reduced to approximately 20% of controls. in vivo uptake of 3h-na and of 35s-sulphate into gradient fractions containing noradrenergic vesicles from the atria decreased to approximately 30% and approximately 40%, respectively. the uptakes of 3h-na and 35s-sulphate were significantly correlated in both control and ganglionectomized cats, and the distributions of 3h and 35s on the gradients wer ... | 1979 | 159599 |
| cough reflex changes in local tracheitis. | the authors describe changes in the cough reflex in unanaesthetized cats with experimental local tracheitis. inflammation was produced by a silk suture fixed in the trachea and cough was elicited by mechanical stimulation of different parts of the respiratory tract mucosa. the resultant cough values (the number of efforts, the intensity of the maximum effort and the intensity of the attack) were compared with the corresponding values in healthy cats. in animals with a tracheal suture, inflammati ... | 1979 | 158777 |
| studies on sulphomucopolysaccharides and atp in adrenergic neurons. | | 1979 | 158940 |
| the role of serotonergic mechanisms on amphetamine-induced stereotyped behaviour. | the effects of 5-hydroxytryptophan (5-htp) and p-chlorophenylalanine (pcpa) on amphetamine-induced stereotyped behaviour (asb) and on the behavioural and eeg effects of caudate nucleus stimulation have been studied in the cat. after a pretreatment with 5-htp (10--30 mg/kg) the threshold dose of amphetamine to induce asb remained the same, but its pattern assumed a more organized character with reduced amplitude of stereotyped movements. on the contrary, after pcpa (200 mg/kg) a disorganized patt ... | 1978 | 159010 |
| [effects of halothane upon the unit activity of the mechanoreceptive primary afferents (author's transl)]. | | 1979 | 159964 |
| types of human intrafusal muscle fibers. | the histochemical and fine structural profiles of human intrafusal muscle fibers were studied. spindles were located in freshly frozen specimens taken from biopsied normal external intercostal muscles, and periodic 10- and 50-mum-thick cross sections were processed alternately for enzyme histochemical and electron microscopic examination. nuclear bag fibers were of two types, bag1 and bag2, histochemically, and they displayed two distinct types of ultrastructure. nuclear chain fibers were histoc ... | 1979 | 160011 |
| modification of pgo activity by specific uptake inhibitors fluoxetine, nisoxetine and lr5182. | | 1979 | 160019 |
| [a study of the tensile strength of cruciate ligaments with regard to the possibilities of prosthetic replacement (author's transl)]. | recent clinical and experimental results in the prosthetic replacement of the anterior cruciate ligament are minimal and this fact has incited us to search for additional fundamental characteristics of natural and synthetic ligaments. the dissection of over 30 human knees (5 fresh and 27 embalmed specimens), of 50 dog knees and of 20 cat knees showed that the posterior cruciate ligament was longer and of bigger size than the anterior cruciate ligament. in dogs, the anatomo-radiological study sho ... | 1979 | 160059 |
| a new grouping of intrafusal muscle fibers based on developmental studies of muscle spindles in the cat. | the development of muscle spindles was studied using the tenuissimus muscle of the cat. observations show that the intrafusal muscle fibers develop as two separate groups: one group represented by a single nuclear bag fiber while the second group comprises the second nuclear bag fiber in association with all the nuclear chain fibers. this grouping is most pronounced in the fetus and is clearly seen in neonatal kittens (i.e., up to 2 weeks of age). as the intrafusal fibers begin to separate from ... | 1979 | 160197 |
| increased passive stiffness of short-term pressure-overload hypertrophied myocardium in cat. | the passive stress-strain relationship of right ventricular papillary muscles from 10 normal and 9 experimental cats with short-term pressure-overload right ventricular hypertrophy-failure was examined by plotting the logarithm of instantaneous stress (ln sigma) against the natural strain calculated as ln(l/l0) where l = instantaneous length and l0 = length at zero force. such a stress-strain relationship was well approximated by a linear relationship. the slope k obtained from this linear relat ... | 1979 | 160206 |
| herpesvirus induced feline urolithiasis--a review. | | 1979 | 160299 |
| [effect of inactivity on muscle spindle function in fast and slow muscles]. | | 1979 | 160342 |
| evaluation of electrode array material for neural prostheses. | matrix support materials for brain surface electrodes used in neuroprosthetic applications were evaluated after chronic subdural implantation over the parietal cortex of the cat. four types of array fabricated with silastic, dacron mesh, or platinum wire annuli were implanted for periods ranging from 5 weeks to 1 year. we evaluated the arrays by access resistance measurements and gross and histological observations of the tissue beneath both nonstimulated and stimulated electrodes. a porous type ... | 1979 | 160513 |
| evaluation of the microsphere-method for determination of cardiac output. | cardiac output was determined by means of radioactive microspheres, 15 +/- 5 microns in diameter. blood flow in the ascending aorta was measured by an electromagnetic flowmeter. in eight cats thirty-eight simultaneous measurements were made of cardiac output and aortic flow. the observations correlated well (r = 0.89), with a mean difference of 5.2%, probably corresponding to coronary blood flow. continuous flow recordings showed no alterations in aortic flow during the injections of microsphere ... | 1979 | 160609 |
| [spinal cord potentials evoked by stimulation of cutaneous afferents in the cat spine (evidence of an n3 wave)]. | negative intermediary cord potentials evoked by low threshold cutaneous afferents were recorded from the surface of the lumbosacral spinal cord. in addition to the n1, n2 waves classically described, it is possible to distinguish a third one names here n3 wave. the characteristics and longitudinal distribution of this wave are different from those of n1 or n2. | 1979 | 160813 |
| dynamic and static responses of primary and secondary spindle endings of the cat peroneus tertius muscle [proceedings]. | | 1979 | 160926 |
| persistence of p1 plates in cat muscle spindles after degeneration of their gamma supply [proceedings]. | | 1979 | 160927 |
| the effect of contraction in the three types of intrafusal fibre in isolated cat muscle spindles on the ia discharge during stretch [proceedings]. | | 1979 | 160928 |
| [comparative anatomy of the arteries of the forelimbs of domestic mammals. i. the arteria radiales system]. | | 1979 | 161484 |
| [decision of vertical dimension and muscular sensation]. | | 1978 | 161737 |
| a comparative study with impromidine (skf 92676), a potent agonist for histamine h2-receptors. | histamine, dimaprit and impromidine caused a relaxation on the isolated cat tracheal muscle contracted by acetylcholine or serotonin. mepyramine partially inhibited the relaxing effect of histamine without altering that of impromidine and dimaprit. both impromidine and dimaprit produced a dose-dependent fall in perfusion pressure of the isolated perfused guinea-pig lung while histamine has a pressor effect in this preparation which reversed into a depressor one in the presence of mepyramine. bot ... | 1979 | 161854 |
| the effects of methylnitrosourea on the immune system and hematopoietic system of adult specific pathogen free cats. | the effects of a single non-carcinogenic dose of 15 mg/kg methylnitrosourea (mnu) on the immune and hematopoietic systems of adult specific-pathogen-free (spf) cats were determined. the cell-mediated-immune (cmi) system was markedly suppressed, as evidenced by: (i) prolonged cutaneous allograft retention time (41-84 days); (ii) decreased lymphocyte blast transformation response to mitogens (2% of pretreatment response to pokeweed mitogen or concanavalin a) and antigen (12% of untreated control c ... | 1979 | 162045 |
| discharge rates of muscle afferents during voluntary movements of different speeds. | | 1979 | 162154 |
| on the intrafusal distribution of dynamic and static fusimotor axons in cat muscle spindles. | | 1979 | 162157 |
| input-output relationship in spinal motoneurons in the stretch reflex. | | 1979 | 162158 |
| efferent and afferent responses during falling and landing in cats. | | 1979 | 162159 |
| responses of dorsal spinocerebellar tract neurons to signals from muscle spindle afferents. | | 1979 | 162160 |
| endotoxin fever in the newborn kitten. the role of prostaglandins and monoamines. | in 5--10 day-old kittens at thermoneutral environmental temperature cerebroventricular injections of 10 microgram serotonin or noradrenaline caused hyperthermia and hypothermia, respectively. central injections of 20 and 200 ng prostaglandin e1 induced hyperthermia. monophasic fever followed the cerebroventricular injections of 0.2 or 0.002 microgram e. coli endotoxin, both in thermoneutral and moderately cool environments. in kittens pretreated with para-chlorophenylalanine (pcpa) the endotoxin ... | 1979 | 162315 |
| [mechanical characteristics of the myocardium of the sloth (bradypus tridactylus)]. | | 1979 | 162510 |
| [motor unit (author's transl)]. | | 1979 | 159704 |
| a possible partitioning of segmental muscle stretch reflex into incompletely de-coupled parallel loops. | based on previous investigations on focused signal transmission through the muscle stretch reflex system, a model is presented suggesting that different muscle areas (especially in large complex muscles such as the triceps surae muscle) may be regulated rather independently with respect to certain internal state variables, particularly internal length. since the parallel localized reflex loops necessary for such local control tasks are inevitably coupled peripherally through the muscle and conne ... | 1979 | 159727 |
| the responses of primary spindle afferents to fusimotor stimulation at constant and abruptly changing rates. | 1. single fusimotor fibres to de-efferented soleus of the cat were stimulated to investigate the size and time course of the responses elicited in single primary spindle afferents. the muscle was kept at constant length close to the physiological maximum. constant and alternating rates of fusimotor stimulation were used: (a) repetitive stimulation at constant rate (maintained stimulation); (b) modulated stimulation with the rate of activation alternating between two constant levels at repeat fre ... | 1979 | 159946 |
| cells of origin of the cutaneous subdivision of the dorsal spinocerebellar tract. | | 1975 | 162841 |
| intracellular study of auditory evoked activity in pericruciate cortex of the awake, non-paralyzed cat. | | 1975 | 162842 |
| trigeminal pathway of the extrinsic eye muscle afferents in cat. | | 1975 | 162843 |
| reciprocal la inhibition during the late reflexes evoked from the flexor reflex afferents after dopa. | | 1975 | 162846 |
| effect of ouabain and phenobarbital on the kinetics of cortical metabolic transients associated with evoked potentials. | | 1975 | 162934 |
| peripheral nerve ischemia. part 1. experimental model. | | 1975 | 162938 |
| projections of extraocular, neck muscle, and retinal afferents to superior colliculus in the cat: their connections to cells of origin of tectospinal tract. | unit recordings were made in the superior colliculus of cats anesthetized with chloralose and with pentothal. electrical stimulation of extraocular muscle afferents and neck muscle afferents excited more units in the superior colliculus than did a variety of moving and stationary visual stimuli. units responding to neck muscle afferent stimulation fell into three populations; one population firing with a short latency and following stimulus presentation up to 1/s, a second population with a long ... | 1975 | 162939 |
| parametric studies of dorsal horn neurons responding to tactile stimulation. | dorsal horn neurons responding to tactile input were recorded in segments l3-s2 of unanesthetized, low-spinal cats. single units were characterized with regard to receptive field (rf) location, rf size and shape, spontaneous discharge rate, central delay, and convergence of four tactile afferent types. 1. rf size increased from the toes to the calf region. 2. length-width ratio increased from the toes to the calf and declined from the calf to the hip. 3. the relation between rf size and position ... | 1975 | 162943 |
| progressive changes in kitten striate cortex during monocular vision. | following initial rearing in either total darkness or normal illumination, kittens at different ages were subjected to right-eye closure and various periods of vision through the left eye. after the period of monocular vision, single units in striate cortex were tested for visual responsiveness through each eye. a severe reduction in the proportion of units responsive to the deprived eye occurred over the first few days of monocular vision. functional abnormalities were variably present after 1 ... | 1975 | 162944 |
| host range of murine xenotropic virus: replication in avian cells. | | 1975 | 163009 |
| a simple, sensitive, and specific assay for free choline in plasma. | | 1975 | 163032 |
| quantitative aspects of the shift-effect in cat retinal ganglion cells. | a sudden displacement of a pattern, even when far away from the classical border of a concentrically organized receptive field, elicits a transient excitatory response in on- and off-center retinal ganglion cells (shift-effect). peak response and latency of the shift-effect have been studied under various stimulus conditions in on- and off-center ganglion cells. increasing the retinal distance between the site of stimulation and receptive field yields responses of increasing latency correspondin ... | 1975 | 163117 |
| generation of spike trains in cns neurons. | the membrane potential waveforms to be expected from many asynchronous inputs to cns neurons are described, along with modes for repetitive firing through which the input waveforms are converted into spike trains. area beneath a postsynaptic potential (psp), rather than psp peak height, is shown to be an important parameter susceptible to modification. occasional crossings of threshold produce occasional spikes, but a sustained depolarizing waveform which attempts to hold the membrane potential ... | 1975 | 163121 |
| modulation of cortical and pyramidal tract induced motor responses by electrical stimulation of the basal ganglia. | two general mechanisms based on anatomical studies are possible for modulation of motor activity by the caudate nucleus and globus pallidus. these mechanisms are: (1) modulation of the output of cortical neurons that exert motor influences; and (2) modulation of subcortical neurons that exert motor influences. differentiation between these two mechanisms was accomplished in the present study by two experimental approaches, both of which employed the conditioning-test paradigm. the first approach ... | 1975 | 163122 |
| an intracellular study of thalamocortical synapses in the orbito-insular cortex. | | 1975 | 163192 |
| [neurochemical and neurophysiological mechanisms of the psychostimulant action of phenamine]. | | 1975 | 163205 |
| association of feline leukemia virus with lymphosarcoma and other disorders in the cat. | two hundred fifty boston cats with disorders such as lymphosarcoma, myeloproliferative disease, anemia, glomerulonephritis, pregnancy abnormalities, feline infectious peritonitis, toxoplasmosis, and various bacterial infections were examined for feline leukemia virus (felv) by immunofluorescence. antibody titers against feline oncornavirus-associated cell membrane antigen (focma) were tested in 133 of these cats. the tests for felv and focma antibody were also conducted among healthy cats not kn ... | 1975 | 163223 |
| nigro-caudate and caudato-nigral relationship: an electrophysiological study. | | 1975 | 162839 |
| characteristics of fast and slow corticobulvar fibre projections to reticulospinal neurones. | | 1975 | 162840 |
| [participation of interoceptive afferent excitations in sensory integration processes of cat visual cortex neurons]. | in experiments on cats immobilized with diplacine it is shown that stimulation of the vagal and splanchnic nerves exerts a substantial influence on the neuronal background activity of field 17 in the brain cortex. neuronal responses as prolonged tonic changes in impulse frequency were seen more often. complex phasic neuronal responses with steady inhibitory periods and periods of activation appeared more rarely. the development of phasic reactions could begin both with activation and initial inh ... | 1977 | 162748 |
| the common cold in cats. | | 1975 | 163430 |
| immunogenic and protective effects of the f-2 strain of feline viral rhinotracheitis virus. | the f-2 strain of feline viral rhinotracheitis (fve) virus was administered by intramuscular (im) injection to susceptible cats. the cats developed serum-neutralizing antibodies and were protected to a significant degree when given, by intranasal (in) instillation challenge inoculum of a virulent strain of fvr virus. | 1975 | 163604 |
| is the prepositus hypoglossi nucleus the source of another vestibulo-ocular pathway? | | 1975 | 163664 |
| baroreceptor effects on medullary respiratory neurones of the cat. | | 1975 | 163666 |
| a mixed-immunoglobulin rosette technique for detection of antibody to feline oncornavirus-associated cell membrane antigen. | a mixed-immunoglobulin rosette technique has been developed for the detection of antibodies to feline oncornavirus-associated cell membrane antigens. lymphoblastoid cells infected with feline leukemia virus were incubated with test sera and then fixed in paraformaldehyde. they were then exposed to a rabbit anti-cat immunoglobulin g serum. antigen-antibody reactions were detected by mixing the cells with sheep erythrocytes sensitized with cat anti-sheep red blood cell serum; the presence of cat a ... | 1975 | 163696 |
| thalamo-cortical projections for recruiting responses and spindling-like responses in the parietal cortex. | 1. the thalamic neurones sending their axons to the parietal association cortex (middle suprasylvian gyrus) and receiving monosynaptic excitation from the cerebellar (interpositus or lateral) nucleus were recorded with microelectrodes extracellularly and intracellularly around the anterior ventral (va) nucleus of the thalamus in cats. such thalamic neurones are known to carry exclusively the impulses responsible for superficial thalamo-cortical (t-c) responses in the parietal cortex, being calle ... | 1975 | 163743 |
| escherichia coli enterotoxin: stimulation of adenylate cyclase in broken-cell preparations. | the enterotoxin from cell-free filtrates of the enteropathogenic escherichia coli strain p-263 was found to stimulate adenylate cyclase activity in broken-cell preparations from myocardial tissue. particulate and detergent-solubilized fractions from cat heart were incubated with enterotoxin and assayed for adenylate cyclase activity. adenylate cyclase activity was stimulated by enterotoxin; the extent of stimulation was proportional to the concentration of enterotoxin. the data demonstrate that ... | 1975 | 163792 |
| naturally occurring persistent feline oncornavirus infections in the absence of disease. | healthy feline leukemia virus (felv)-infected cats from leukemia cluster environments were followed for up to 23 months for development of disease and evidence of alteration in the hemogram. the incidence of disease development in felv-postive cats was more than fivefold higher than the incidence for felv-negative cats. ten cases of leukemia developed in 69 infected cats, whereas one case of leukemia occurred in 59 uninfected cats. the incidence for development of diseases other than leukemia wa ... | 1975 | 163793 |
| peptides with nh2-terminal tryptophan in adrenocorticotrophic hormone and melanocyte-stimulating hormone granules of adenohypophysis. | fluorescence microscopy has demonstrated formaldehyde-ozone-induced fluorescence in the pars intermedia cells (melanocyte-stimulating hormone cells) and in certain cells of the pars distalis of the mammalian pituitary. from histochemical and chemical evidence the fluorescence is believed to reflect the presence of peptides with nh2-terminal tryptophan. in the pars distalis of hamster, cat and pig pituitary, the cells that exhibit formaldehyde-ozone-induced fluorescence have now been identified a ... | 1975 | 163855 |
| the densities of herpesviral dnas. | | 1975 | 164053 |
| [quantitative changes in proteins in the cat parietal zone large pyramids in various sleep stages and during wakefulness]. | protein content in large pyramidal cells of the parietal cortex was shown to be by 28.9% lesser during the slow--wave sleep than during the paradoxical sleep. | 1975 | 164070 |
| editorial: advances in leukaemia virus research. | | 1975 | 164081 |
| physiological studies of the dying-back phenomenon. muscle stretch afferents in acrylamide neuropathy. | (1) the responses of 1,001 medial gastrocnemius afferents with conduction velocities of 24-126 m/sec have been studied in cats with experimental acrylamide neuropathy. (2) many units which conducted at velocities indicating that they innervated muscle stretch receptors failed to discharge during muscle stretch or contraction. in animals with mild neuropathy 10 per cent of 366 units were non-responsive. in animals with moderate or severe neuropathy the proportion of non-responsive units was 68 pe ... | 1975 | 164259 |
| regional distribution of substance p in the spinal cord and nerve roots of the cat and the effect of dorsal root section. | chemical properties of substance p in the spinal cord and dorsal roots of the cat were examined by gel chromatography and paper electrophoresis. the results suggest that the substance is identical with the undecapeptide, hypothalamic substance p, recently isolated from bovine hypothalamus. distribution of substance p in the cat spinal cord (l5-s1) was investigated. substance p was highly concentrated in the dorsal horn, where the highest level was found in the dorsal part. after the unilateral l ... | 1975 | 164261 |
| effect of ouabain and phenobarbital on oxidative metabolic activity associated with spreading cortical depression in cats. | | 1975 | 164264 |
| responses of electrical potential, potassium levels, and oxidative metabolic activity of the cerebral neocortex of cats. | we measured simultaneously the oxidative metabolic activity, monitored as the tissue fluorescence attribute to intramitochondrial nadh, the extracellular potassium level with ion-selective microelectrodes, and the focal extracellular electrical potential, of one site in intact cerebral cortex of cats. when the cerebral was stimulated by trains of repeated electric pulses applied either directly to its surface or to an afferent pathway, the corrected cortical fluorescence (f-r) declined indicatin ... | 1975 | 164265 |
| motoneuron dendrites: role in synaptic integration. | dendrites constitute over 80 per cent of the receptive surface area in cat motoneurons. calculations based on matched electrical and gemoetrical measurements in these neurons indicate that the specific resistance of dendritic membranes in resting motoneurons is at least 2,000 ohm-cm2. when the specific membrane resistance is this high, even the most distal dendritic synapses can contribute significantly to the depolarization of the soma, and hence influence the rate of action potential generatio ... | 1975 | 164391 |
| stimulation of pancreatic electrolyte secretion by cholera toxin. | | 1975 | 164537 |
| feline oncornavirus-associated cell membrane antigen. ii. antibody titers in healthy cats from household and laboratory colony environments. | antibody titers to the feline oncornavirusassociated cell membrane antigen (focma) were determined for 447 healthy cats from laboratory colony and household environments. only 2.7 percent of 221 cats from colony environments were antibody positive as compared to 50.4 percent of 256 cats from household environments. incidence of focma antibody and geometric mean antibody titer for pet cats from new york city representing single cat apartment habitats were substantially lower than values for unscr ... | 1975 | 164562 |
| feline oncornavirus-associated cell membrane antigen. iii. antibody titers in cats from leukemia cluster households. | serum samples from 182 healthy cats residing in environments known to have a natural exposure to feline leukemia virus (felv) were examined for the presence of antibody to the feline oncornavirus-associated cell membrane antigen. the number included 138 cats from leukemia-"cluster" households. such cats previously showed greatly increased frequencies of felv infection, as determined by the virus group-specific antigen (gasa) in peripheral blood leukocytes and platelets. the geometric mean antibo ... | 1975 | 164563 |
| aberrant viruses in cells infected with murine sarcoma virus-feline leukemia virus. | this study describes an unusual type of virus seen when a feline leukemia virus (felv) pseudotype of murine sarcoma virus (musv) obtained by cocentrifugation procedures infected feline embryo cells (fef) and two crandell cat cell lines (crfk1, crfk2). when all three cell cultures were infected with musv-felv, only fef and crfk2 were transformed and only these showed normal and aberrant virus. the crfk1 infected with musv-felv did not transform but did replicate normal type-c virus with a 50-a in ... | 1975 | 164569 |
| new theory for receptor mechanism of carotid body chemoreceptors. | | 1975 | 164630 |
| demonstration of feline leukemia virus antibody in cats by passive hemagglutination (38583). | two felv fractions from sephadex g-150 gel filtration were used to sensitize rbc for the pha test. when the cells were coated with the fraction from the second peak consisting mostly of a mojor gs antigen of felv, no antibodies could be detected either in hyperimmunized cat sera or sera from leukemic cats, whereas antibodies were readily detectable in immunized rabbits. using cells coated with the first peak eluants or tween-ether disrupted felv, pha antibodies were detected in cat sera. there e ... | 1975 | 164675 |
| excitation-secretion coupling in exocrine glands. properties of cyclic amp phosphodiesterase and adenylate cyclase from the submaxillary gland and pancreas. | 1. the cyclic amp phosphodiesterase in homogenates of the submaxillary gland and pancreas was found to be associated mainly with the 300,000 times g supernatant fraction. a lineweaver-burk plot showed a high-affinity (km app. = 1.6 mum) and a low-affinity (km app. greater than 100mum) component for the cyclic amp substrate. the enzyme was magnesium dependent, and strongly inhibited by papaverine, theophylline and caffeine. cyclic gmp inhibited cyclic amp phosphodiesterase, but only in concent ... | 1975 | 164921 |
| possible role of a beta-adrenoceptor in the regulation of noradrenaline release by nerve stimulation through a positive feed-back mechanism. | 1 the effects of isoprenaline, propranolol and phentolamine, were studied on tritiated noradrenaline overflow elicited by postganglionic nerve stimulation in guinea-pig isolated atria. 2 isoprenaline (1.2 times 10-minus 8m) increased while propranolol (1.0 times 10-minus 7m) reduced the overflow of tritiated noradrenaline evoked by nerve stimulation. these effects were less than those of phentolamine (3.1 times 10-minus 6m), which increased by approximately three-fold the overflow of [3h]-noradr ... | 1975 | 164967 |
| synaptic delay in superior cervical ganglion of the cat. | | 1975 | 164978 |
| [evoked activity of cat association cortex neurons in different sleep stages]. | evoked activity of neurons in the parietal associative cortex in response to adequate and electric stimulations of the thalamic radiation fibers was studied during different phases of sleep. the number of responding neurons decreased during slow--wave and, particularly, during paradoxical sleep. with transition from phase to phase, responsiveness changed mainly in polysensory neurons which gave variable responses with long latencies. mechanisms of change of responsiveness during the two phases a ... | 1975 | 165099 |
| the importance of picornavirus infections in respiratory disease of man and other mammals. | picornaviruses may be divided, by physicochemical properties, into enteroviruses, cardioviruses, caliciviruses, rhinoviruses and foot-and-mouth diseases viruses. although the respiratory tract may be the primary site of entry and multiplication for enteroviruses, cardioviruses and fmd viruses, few agents in these groups cause respiratory disease. a notable exception is coxsackievirus a21 which is an important cause of upper respiratory tract diseases in military recruits. the picornaviruses whic ... | 1975 | 165133 |
| pain mechanism in the central nervous system. | | 1975 | 165142 |
| significance of central norepinephrine-containing neurons in sensory transmission. | | 1975 | 165143 |
| behavior of cortical neurons during both sleep and barbiturate anesthesia. | | 1975 | 165144 |
| neural background of sleep and anesthesia. | | 1975 | 165145 |
| occurrence of nervous-tissue tumors in cattle, horses, cats and dogs. | from 11 north american veterinary university hospitals and clinics, 248 animals were a confirmed diagnosis of nervous-tissue tumor were identified; 7 tumors were found in cattle, 28 in horses, 14 in cats, 199 in dogs, and none in other species. tumors were divided for analysis into three categories-glial, meningeal, and peripheral nerve. in cattle and horses, all tumors involved peripheral nerves, the risk of which, in horses, reached a plateau at 4-6 years of age and remained constant thereafte ... | 1975 | 165149 |
| [regulation of the biosynthesis of acetylcholine (author's transl)]. | | 1975 | 163477 |
| anemia associated with feline leukemia virus infection in cats. | the types of anemia associated with natural and experimental feline leukemia virus (felv) infection in cats were investigated. in one experiment, 10 kittens were inoculated neonatally with jarrett felv-1, an isolate of subgroup a; 6 developed anemia a few weeks later. this anemia was characterized by macrocytosis, normoblastosis, increased erythropoiesis in the bone marrow, and extramedullary hematopoiesis in the spleen. anemia was transient and nonfatal and occurred before the onset of lympoid ... | 1975 | 163317 |
| feline leukaemia virus and its clinical effects in cats. | feline leukemia virus (felv) infection is common among cats where contact is high. the virus can be transmitted readily between cats. it causes a variety of haemopoietic and lymphoid neoplasms; the most common types are alimentary, multicentric and thymic lymphosarcoma and lymphatic leukaemia. the virus is involved in the aetiology of certain other diseases including anaemia, glomerulonephritis and an immunosuppressive syndrome which predisposes cats to intercurrent infections. many infected cat ... | 1975 | 163515 |
| mixed tumour of salivary gland showing histological evidence of malignancy in a cat. | | 1975 | 165225 |
| control by preynaptic correlation: a mechanism affecting information transmission from ia fibers to motoneurons. | 1. in the unanesthetized spinal cord of the cat, simultaneous intracellular recordings were made from two motoneurons belonging to the gastronemius motor nucleus. 2. supramaximal iterative stimulation of small branches of the gastrocnemius nerve produced monosynaptic epsps (ia epsps) of varying amplitude superimposed on a fluctuating base line. 3. in most cases the variance of the motoneuron membrane potential was increased above base-line levels with a time course approximately matching the ia ... | 1975 | 165268 |
| nadh fluorescence and [k+]o changes during hippocampal electrical stimulation. | 1. short (2 s) trains of stimuli were applied to the dorsal hippocampal surface of cats, producing an increase in [k+]o and a decrease in nadh fluorescence (the latter being indicative of an increase in tissue oxygen utilization). 2. the [k+]o rose rapidly during stimulation (delta[k+]o values from 1 to 6 mm) with larger stimulus currents producing larger changes. the time course of the poststimulus decline of [k+]o was an exponential decay function, with t 1/2 values varying from 1.3 to 6.9s, a ... | 1975 | 165273 |