| the sameness-difference discrimination problem in chimpanzee. | | 1955 | 13242689 |
| a fatal case of amebiasis with liver abscesses and ulcerative colitis in a chimpanzee. | | 1955 | 14367204 |
| animal fats. 5. the component acids of chimpanzee fat. | | 1955 | 14363117 |
| on reactions of plant anti-n with red cells of chimpanzees and other animals. | | 1955 | 14361656 |
| [motor conditioned reflexes to chain of stimuli in young chimpanzee]. | | 2006 | 13257860 |
| studies of active immunogenesis in poliomyelitis. ii. lack of immunity in chimpanzees receiving formol-inactivated vaccines of marginal antigenic potency. | | 1954 | 13207107 |
| studies of active immunogenesis in poliomyelitis. i. persistence and recall by homotypic or heterotypic superinfection of neutralizing antibody originally induced in chimpanzees by vaccination or infection. | | 1954 | 13207106 |
| relational discrimination of intermediate size in the chimpanzee. | | 1954 | 13221687 |
| the cultural capacity of chimpanzee. | | 1954 | 13221317 |
| approach versus avoidance in an ambiguous-cue discrimination problem in chimpanzees. | | 1954 | 13152227 |
| nonspatial delayed response to trial-unique stimuli in sophisticated chimpanzees. | | 1953 | 13109081 |
| picture perception in a home-raised chimpanzee. | | 1953 | 13109075 |
| experimental studies on passive immunization against poliomyelitis. iii. passive-active immunization and pathogenesis after virus feeding in chimpanzees. | | 1953 | 13065275 |
| hemagglutinogens of the chimpanzee. | | 1953 | 13092241 |
| growth and development of the chimpanzee; a longitudinal and comparative study. | | 1953 | 13096075 |
| reinforcement and hypothesis in the discrimination behavior of chimpanzees. | | 1953 | 13052870 |
| concurrent discrimination learning in chimpanzees. | | 1953 | 13044868 |
| discrimination learning set in chimpanzees. | | 1953 | 13044867 |
| quantitative studies of the virus-host relationship in chimpanzees after inapparent infection with coxsackie viruses. i. the virus carrier state and the development of neutralizing antibodies. | following oral administration of coxsackie viruses (c viruses) to susceptible chimpanzees, these agents can be isolated from the throat for a period of approximately a week, from the blood for a few days, and from the stools for 2 to 3 weeks or even longer. animals so infected respond with the formation of specific neutralizing antibodies which are maintained for at least 1 to 2 years. such chimpanzees are immune when challenged orally with homologous strains of virus. they then excrete virus in ... | 1953 | 13052807 |
| test of the abstract attitude in chimpanzees following ablation of prefrontal cortex. | | 1953 | 13029967 |
| [conditioned inhibition in primates. i. ability of production and discrimination of conditioned inhibitions by young chimpanzee]. | | 1953 | 13217014 |
| [conditioned exploratory reflexes in chimpanzee]. | | 1953 | 13217000 |
| [temporary connections to undifferentiated stimuli in chimpanzee]. | | 1953 | 13216999 |
| imitation in a home-raised chimpanzee. | | 1952 | 13000013 |
| birth order and birth weight in the chimpanzee. | | 1952 | 14923845 |
| effects of restricted opportunity for tactual, kinesthetic, and manipulative experience on the behavior of a chimpanzee. | | 1951 | 14885499 |
| figural preferences in the drawings of a chimpanzee. | | 1951 | 14873830 |
| analysis of a complex conditional reaction in chimpanzee. | | 1951 | 14814236 |
| some quantitative dental characteristics of the chimpanzee, gorilla and orangutang. | | 1950 | 24538528 |
| fatal ingestion of tintacks by chimpanzee. | | 1950 | 15431494 |
| atypical pneumonia in a chimpanzee treated with chloromycetin. | | 1950 | 15431480 |
| hormonal modification of social behavior; the mechanism of estrogen-induced dominance in chimpanzees. | | 1950 | 15428551 |
| poliomyelitis in chimpanzees; studies in homologous and heterologous immunity following inapparent infection. | the response of eighteen chimpanzees to poliomyelitis virus administered orally and cutaneously has been studied. there were no signs of weakness or paralysis in any of the animals. sixteen of the eighteen (89 per cent) became infected as measured by intestinal carriage of virus. only one of twelve was reinfected when challenged with an homologous (or homotypic) strain by the same routes, but seven of ten were reinfected on heterologous challenge. a correlation between the development of humoral ... | 1950 | 15422085 |
| [utilization of the chimpanzee in experimental medicine: origin, success, failure, abandonment. is a return possible?]. | | 2014 | 15420234 |
| subclinical poliomyelitis in the chimpanzee and its relation to alimentary reinfection. | | 1950 | 15401866 |
| retardation in onset of ossification in chimpanzee related to various environmental and physiological factors. | | 1949 | 15409815 |
| conditional matching behavior in chimpanzee; implications for the comparative study of intelligence. | | 1949 | 18143113 |
| the cerebral cortex of the chimpanzee at the time of birth. | | 1949 | 18147138 |
| temperament in chimpanzees; method of analysis. | | 1949 | 18151779 |
| onset of ossification in the epiphyses and short bones of the extremities in chimpanzee. | | 1949 | 18150961 |
| the failure of estrogen to induce changes in the sex skin of the male chimpanzee. | | 1949 | 18109887 |
| observations on the sex skin and sex cycle in the chimpanzee. | | 1948 | 18890098 |
| sex-hormones and social behavior in chimpanzees. | | 1948 | 18882478 |
| the lack of effect of estrogen on the sex skin of the infant male chimpanzee. | | 1948 | 18932470 |
| experimental fort bragg fever (pretibial fever) in chimpanzees. | | 1948 | 18910602 |
| the anatomical basis of phonation in the chimpanzee. | | 1948 | 18902231 |
| analysis of matching behavior in chimpanzee. | | 1948 | 18904766 |
| frontal lobe ablation in chimpanzee; a resume of becky and lucy. | | 1948 | 18106849 |
| threshold bleeding and the sex skin in the castrate female chimpanzee. | | 1947 | 18895666 |
| observations on sense of smell in chimpanzees. | | 1947 | 20262469 |
| threshold bleeding and the sex skin in the castrate female chimpanzee. | | 1947 | 20342528 |
| active immunity to poliomyelitis in chimpanzees following subclinical infection. | this report is concerned with the production of subclinical poliomyelitis in the chimpanzee, and immunity to such infection. subclinical infection was produced in eight chimpanzees by the administration of virus orally or intracutaneously, and was measured by the production of a virus carrier state and the development of neutralizing antibodies. immunity was tested by attempting to induce the carrier state again by a challenge dose of virus by the same routes. with an homologous strain as the ch ... | 1947 | 19871615 |
| spontaneous neurosis in chimpanzees; theoretical relations with clinical and experimental phenomena. | | 1947 | 20284392 |
| the rh system in the chimpanzee. | | 1946 | 17772329 |
| the rh system in the chimpanzee. | | 1946 | 20997616 |
| the rh system in the chimpanzee. | | 1946 | 17814239 |
| hormonal modification of social behavior; the effects of sex-hormone administration on the social dominance status of the female-castrate chimpanzee. | | 2011 | 20999147 |
| estrogens and the sex skin in the male chimpanzee. | | 1946 | 20996891 |
| can chimpanzees become morphine addicts? | | 1946 | 21023310 |
| estrogen-progesterone interaction in the sex-cycle of the chimpanzee. | | 1946 | 21066215 |
| the effect of sex hormones on the dominance-subordination relationships of the castrate female chimpanzee. | | 1946 | 21065905 |
| the mechanism of estrogen induced changes in dominance-subordination relationships in the female chimpanzee. | | 1946 | 21065885 |
| prepubertal castration in the male chimpanzee, with some effects of replacement therapy. | | 1945 | 21011758 |
| hormonal modifications of social behavior; the effect of sex-hormone administration on the social status of a male castrate chimpanzee. | | 1945 | 21004998 |
| failure to transmit infectious hepatitis to chimpanzees. | | 1945 | 21004044 |
| the rh and hr factors in chimpanzees. | | 1945 | 17844227 |
| studies of infant chimpanzees. | | 1942 | 17818874 |
| chimpanzee handedness. | | 1941 | 17801500 |
| laboratory chimpanzees. | | 1940 | 17796112 |
| the chromosomes of the chimpanzee. | | 1940 | 17783328 |
| the use of the friedman test for pregnancy with chimpanzees. | | 1939 | 21433870 |
| pre-linguistic sign behavior in chimpanzee. | | 1939 | 17819460 |
| the thalamus of the chimpanzee: iv. thalamic projections to the cerebral cortex. | | 1938 | 17104750 |
| the time of ovulation in chimpanzees. | | 1938 | 21433772 |
| concerning reproduction in the chimpanzee. | | 1937 | 21433749 |
| the external configuration of the cerebral hemispheres of the chimpanzee. | | 1936 | 17104620 |
| chimpanzee metabolism. | | 1936 | 16588092 |
| the sexual and reproductive cycles of chimpanzee. | | 1936 | 16577711 |
| death of the oldest chimpanzee in captivity. | | 1936 | 17742371 |
| a second-generation captive-born chimpanzee. | | 1935 | 17748586 |
| the birth of chimpanzee at the zoological gardens, london: (section of obstetrics and gynæcology). | | 1935 | 20914700 |
| the birth of chimpanzee at the zoological gardens, london: (section of obstetrics and gynaecology). | | 1935 | 19990303 |
| the menstrual cycle of the primates: part vii. the sexual skin of the chimpanzee. | | 1934 | 17104514 |
| the cultivation of a species of troglodytella, a large ciliate, from the chimpanzee. | | 1932 | 17779662 |
| the arterial supply of the cerebral cortex in the chimpanzee (anthropopithecus troglodytes). | | 1930 | 17104307 |
| australopithecus not a chimpanzee. | | 1930 | 17843430 |
| cranium of a chimpanzee, showing metopic suture; also fontanelle and sutural bone-plates. | | 1911 | 17232908 |
| report lxxxiii: some experiments on enterica, scarlet fever, and measles in the chimpanzee : [a preliminary communication.]. | | 1904 | 20761451 |
| the mental powers of the chimpanzee. | | 1889 | 17754069 |
| on some points in the anatomy of the chimpanzee (anthropopithecus troglodytes). | | 1883 | 17231511 |
| the muscles and nerves of a chimpanzee (troglodytes niger) and a cynocephalus anubis. | | 1871 | 17230919 |
| on some points in the anatomy of the chimpanzee. | | 1867 | 17230717 |
| merkel cell polyomavirus infection of animal dermal fibroblasts. | merkel cell polyomavirus (mcpyv) is the first polyomavirus to be associated with human cancer. mechanistic studies attempting to fully elucidate mcpyv oncogenic mechanisms have been hampered by the lack of animal models for mcpyv infection. in this study, we examined the infectability of mcpyv-gfp pseudovirus, mcpyv recombinant virion, and several mcpyv chimeric viruses in dermal fibroblasts isolated from various model animals, including mouse (mus musculus), rabbit (oryctolagus cuniculus), rat ... | 2017 | 29167345 |
| morphological integration in the gorilla, chimpanzee, and human neck. | although integration studies are important to understand the evolution of organisms' traits across phylogenies, vertebral integration in primates is still largely unexplored. here we describe and quantify patterns of morphological integration and modularity in the subaxial cervical vertebrae (c3-c7) in extant hominines incorporating the potential influence of size. | 2018 | 29446467 |
| self-control in chimpanzees relates to general intelligence. | for humans, there appears to be a clear link between general intelligence and self-control behavior, such as sustained delay of gratification [1-9]. chimpanzees also delay gratification [10-12] and can be given tests of general intelligence (g) [13-15], but these two constructs have never been compared within the same sample of nonhuman animals. we presented 40 chimpanzees with the hybrid delay task (hdt) [16, 17], which measures inter-temporal choices and the capacity for sustained delay of gra ... | 2018 | 29429613 |
| pathogen transmission from humans to great apes is a growing threat to primate conservation. | all six great ape species are listed as endangered or critically endangered by the iucn and experiencing decreasing population trends. one of the threats to these non-human primates is the transmission of pathogens from humans. we conducted a literature review on occurrences of pathogen transmission from humans to great apes to highlight this often underappreciated issue. in total, we found 33 individual occurrences of probable or confirmed pathogen transmission from humans to great apes: 23 inv ... | 2018 | 29362964 |
| adaptive evolution of rh5 in apeplasmodiumspecies of thelaveraniasubgenus. | plasmodium falciparum, the major cause of malaria morbidity and mortality in humans, has been shown to have emerged after cross-species transmission of one of six host-specific parasites (subgenuslaverania) infecting wild chimpanzees (pan troglodytes) and western gorillas (gorilla gorilla). binding of the parasite-encoded ligand rh5 to the host protein basigin is essential for erythrocyte invasion and has been implicated in host specificity. a recent study claimed to have found two amino acid ch ... | 2018 | 29362238 |
| systemic patterns of trabecular bone across the human and chimpanzee skeleton. | aspects of trabecular bone architecture are thought to reflect regional loading of the skeleton, and thus differ between primate taxa with different locomotor and postural modes. however, there are several systemic factors that affect bone structure that could contribute to, or be the primary factor determining, interspecific differences in bone structure. these systemic factors include differences in genetic regulation, sensitivity to loading, hormone levels, diet, and activity levels. improved ... | 2018 | 29344941 |
| atypical experiences of captive chimpanzees (pan troglodytes) are associated with higher hair cortisol concentrations as adults. | experiences during early development are influential on the lives of human and non-human primates into adulthood. the population of captive chimpanzees in the usa can provide insight into this relationship, as collectively they have experienced a wide range of exposure to both conspecifics (those raised in natal groups) and humans (those raised as personal pets or performers). our study investigated chimpanzee exposure to humans using a continuous measure of categorization, the chimpanzee-human ... | 2017 | 29308234 |
| avoidance of biological contaminants through sight, smell and touch in chimpanzees. | avoiding biological contaminants is a well-known manifestation of the adaptive system of disgust. in theory, animals evolved with such a system to prevent pathogen and parasite infection. bodily products are human-universal disgust elicitors, but whether they also elicit avoidance behaviour in non-human primates has yet to be tested. here, we report experimental evidence that potential exposure to biological contaminants (faeces, blood, semen), as perceived via multiple sensory modalities (visua ... | 2017 | 29291090 |