Publications

the production of hormonal steroids by ovarian tissues of the chinchilla (chinchilla laniger).		1971	4253598
the formation of learning sets by the chinchilla in an auditory discrimination task.	the performance of 9 chinchillas (chinchilla lanigera) in a completely computer-automated sound-discrimination experiment was observed using stimulus pairs from a library of 180 complex sounds. each sound of a pair was 0.2-2.08 sec in duration, separated by an interval of 250 +/- 125 msec. a modified "go/no go" paradigm was used. licking behavior at a water-delivery tube was occasioned by keeping ss at about 85% of ad-lib weight by water deprivation. after habituation and blank-trials training s ...	1986	3624198
qualities and locations of stimuli and responses affecting discrimination learning of chinchillas (chinchilla laniger) and pigeons (columba livia).	chinchillas and pigeons were used as subjects in separate experiments to study interactions among stimulus and response characteristics in discrimination learning. both the stimuli and the responses could differ with respect to their "quality" and their "location." bright versus dim lights and upper versus lower lights served as the stimulus qualities and stimulus locations for the chinchillas, respectively. red versus green lights and upper versus lower lights served as the stimulus qualities a ...	1987	3608421
flow sorting of x and y chromosome-bearing spermatozoa into two populations.	the only established difference on which to base the separation of x and y chromosome-bearing spermatozoa is chromosomal constitution. this difference is quantifiable both from chromosome morphology (karyotype) and from dna content. flow cytometric techniques were used to measure relative dna content of the x and y populations and to flow-sort spermatozoa from chinchilla laniger. epididymal spermatozoa were recovered in pbs, fixed in 80% ethanol, treated with papain and dithioerythritol, and sta ...	1987	3506896
peripheral plasma progesterone concentration and haematological indices during normal pregnancy of chinchillas (chinchilla laniger, m.).	peripheral plasma progesterone concentration and some haematological indices in pregnant chinchillas were studied. as pregnancy advanced progesterone concentration showed a marked change from high values in early pregnancy (days 9-29), to undetectable values by days 40-60, and from high values in the latter states of pregnancy (days 70-80), to very low values during the 30 days before parturition. haematocrit value and mean erythrocyte volume change inversely to progesterone concentration fluctu ...	1985	2866889
the colonic separation mechanism in the guinea-pig (cavia porcellus) and the chinchilla (chinchilla laniger).	in guinea-pig, the concentration of nitrogen and viable bacteria were nearly twice as high in the contents of the colonic furrow compared to the contents of the corresponding lumen. labelled bacteria infused into the proximal colon of guinea-pigs were transported in the furrow into the caecum. both species produced two types of pellets, one nitrogen-rich intended for caecotrophy, and one nitrogen-poor delivered as faecal pellets. the furrow is part of a separation mechanism in both species savin ...	1985	2866874
a simple method for intravenous injection and blood collection in the chinchilla (chinchilla laniger).	a simple method is outlined for intravenous injection and blood collection from a peripheral vein in the chinchilla. seven peripheral vein sites were successfully venipunctured in unanaesthetized chinchillas: the femoral, cephalic, auricular, saphenous, dorsalis penis, lateral abdominal and tail veins. the femoral and cephalic veins were found to be the best sites for injection and blood collection.	1989	2724918
electron microscopy of absorptive enterocytes in the large intestine of the chinchilla (chinchilla laniger).		1989	2607732
seasonal fluctuations in plasma protein fraction levels of chinchillas (chinchilla laniger, m.).	seasonal changes in blood plasma protein fractions in chinchilla females and males were found. plasma albumin levels in both sexes vary according to season, generally low in winter and spring and high in summer and autumn. the levels of alpha 1-globulin and gamma-globulin increase markedly in spring (1.5 times higher than in winter and autumn). in chinchilla females, the levels of alpha 2-globulin and beta 2-globulin varied biphasically, being higher in winter and summer. in males, clear seasona ...	1985	2579763
twenty-four hour changes in lysozyme levels, total plasma protein concentration, gamma-globulin concentration, white blood cell count and numbers of lymphocytes and granulocytes in the peripheral blood of chinchillas chinchilla laniger m. and rabbits oryctolagus cuniculus l.	twenty-four hour changes in lysozyme level, total plasma protein concentration, gamma-globulin concentration, leucocyte number and different forms of leucocyte in the peripheral blood of male chinchillas and rabbits were investigated. all investigated parameters in both species showed statistically significant 24-hr changes, but only total plasma protein concentration in rabbits and gamma-globulin concentration and leucocyte number in chinchillas have a circadian rhythm character. the cosine cur ...	1987	2435451
cytoarchitectonic atlas of the cochlear nucleus of the chinchilla, chinchilla laniger.	a detailed cytoarchitectonic atlas of the chinchilla cochlear nucleus complex was prepared in the transverse plane with the nissl method. subdivisions of the cochlear nucleus were defined on the basis of cell size, cell packing density, and, in some cases, on cytological features of cell types. in general, the chinchilla cochlear nucleus has an organizational plan similar to that described for other mammalian species. as in other rodents, the chinchilla has a large and well-developed dorsal coch ...	1990	2258463
purification and n-terminal characterization of chinchilla villidera alpha-1-antitrypsin.	1. chinchilla, chinchilla villidera, alpha-1-antitrypsin has been purified to homogeneity and partially characterized according to mol. wt, amino acid and carbohydrate composition and n-terminal amino acid sequence (30 residues). 2. the mol. wt is between 52,000 and 55,000 as determined by page or sedimentation equilibrium. 3. the best alignment between chinchilla, human and baboon alpha-1-antitrypsin amino acid sequences offsets the chinchilla sequence 6 positions vs the primate structures. 4. ...	1990	2184987
naturally occurring histoplasmosis in the chinchilla (chinchilla laniger).	histoplasmosis was diagnosed histopathologically in a female chinchilla. this animal had originated from a commercial chinchilla ranch in central missouri. seventeen of 130 animals in the colony had died within a month's period with a respiratory illness. this animal had a history of fur chewing, but this was not true of all the other animals that had died. histoplasma capsulatum was cultured from timothy hay used for food.	1975	1176618
papillae and galactophore numbers in mammae of cricetus auratus, meriones unguiculatus, spermophilus tridecemlineatus, and chinchilla laniger.		1975	1113045
cell mediated immunity in the chinchilla (chinchilla laniger): in vitro lymphocyte transformation.	the cell mediated immune system of the chinchilla (chinchilla laniger) was examined using both in vivo and in vitro methods. an in vitro lymphocyte transformation microassay was developed utilizing tritiated thymidine incorporation into spleen cells stimulated by the nonspecific mitogen, phytohemagglutinin-m. peak stimulation of blastogenesis occurred between 48 and 72 hours of incubation with 5 x 10(6) cells/ml in 12.5 mul phytohemagglutinin-m/ml. in spleen cell cultures from chinchillas sensit ...	1976	979141
a restraining device and oral dosing technic for the chinchilla (chinchilla laniger).	a device, based on the principle of a cattle squeeze chute, was designed for restraining a chinchilla; and a cannula-tipped syringe was designed for introducing a solution into the animal's throat. the restraining device allows 1 person to conduct routine clinical procedures while the cannula-tipped syringe facilitates oral administration of liquids.	1976	966706
[double infection of the brain with frenkelia species and toxoplasma gondii in chinchilla laniger].	two caged chinchillas that died with convulsions had a focal necrotic meningoencephalitis of toxoplasmic origin. independently of and remote from this inflammatory reaction were several lobulated frenkelia cysts up to 0.6 mm diameter in the brain. morphologically and in the way they stained they resembled frenkelia in various microtus-species and in ondatra zibethica. although toxoplasmosis commonly is found in the chinchilla this is the first report of frenkelia in this species. ecological cons ...	1977	855142
adaptation of the orbital sinus bleeding technique to the chinchilla (chinchilla laniger).	the orbital sinus bleeding technique was used to obtain 1-3 ml samples of venous blood from chinchillas (chinchilla laniger) within 1 minute. by monitoring food intake and body weight, this technique was shown to have no detrimental effects on the general health of the animals, but serial samples taken twice weekly over a period of 2 months did induce some degree of hemorrhage or occasional corneal opacity in some animals.	1977	853712