Results 31 to 40 of about 6,395 (226)
Hemodynamic molecular imaging of tumor-associated enzyme activity in the living brain
eLife, 2021 Molecular imaging could have great utility for detecting, classifying, and guiding treatment of brain disorders, but existing probes offer limited capability for assessing relevant physiological parameters.
Mitul Desai +7 more
doaj +1 more source
Effects of environmental perturbations during postnatal development on the phenotypic integration of the skull [PDF]
, 2011 Integration and modularity are fundamental determinants of how natural selection effects evolutionary change in complex multivariate traits. Interest in the study of the specific developmental basis of integration through experimental approaches is ...
Gonzalez, Paula Natalia +2 more
core +2 more sources
Visual acuity of “Saimiri sciureus” [PDF]
Psychonomic Science, 1965 The visual acuity of the squirrel monkey was studied by the method of least separable lines. Five animals were studied in two different apparatuses by two different experimenters. Thresholds of 75% correct were established at 0.84 min. of visual angle. Decline in correct responses was well coordinated with increasing latency of response.
openaire +2 more sources
From armadillos to sloths: Patterns and variations in xenarthran coronary anatomy
The Anatomical Record, EarlyView.Abstract Species of the superorder Xenarthra play a vital ecological role in the Neotropics. Despite their evolutionary significance, anatomical studies on their coronary circulation remain scarce. This study investigated the coronary anatomy of 82 hearts from nine Xenarthra species across the Dasypodidae, Myrmecophagidae, and Bradypodidae.
Wilson Viotto‐Souza +5 more
wiley +1 more source
An Adaptive Threshold in Mammalian Neocortical Evolution
, 2013 Expansion of the neocortex is a hallmark of human evolution. However, it remains an open question what adaptive mechanisms facilitated its expansion.
Huttner, Wieland B +4 more
core +3 more sources
The Anatomical Record, EarlyView.Comparative histological and semi‐automated image analysis of primate lips: Masson's trichrome‐stained sagittal sections were segmented to quantify the connective tissue, adipose, and muscular components, enabling interspecific comparisons of labial architecture.
Liat Rotenstreich +5 more
wiley +1 more source
Ciencia Amazónica (Iquitos), 2014 En este artículo se proporciona información sobre la diversidad, tamaño de grupo y densidad poblacional de primates para cada hábitat diferenciado en el área de estudio.
Rolando Aquino +2 more
doaj +3 more sources
Molecular data highlight hybridization in squirrel monkeys (Saimiri, Cebidae)
Genetics and Molecular BiologyHybridization has been reported increasingly frequently in recent years, fueling the debate on its role in the evolutionary history of species. Some studies have shown that hybridization is very common in captive New World primates, and hybrid offspring ...
Jeferson Carneiro +3 more
doaj +3 more sources
Memorias do Instituto Oswaldo Cruz, 1992 Six Plasmodium falciparum protein fractions, isolated under reducing conditions, were used to immunize mice, rabbits and the squirrel monkey Saimiri sciureus. Five or seven subcutaneous injections of each antigenic preparation, in conjunction with Freund'
Antonio B. Cruz Cubas +7 more
doaj +1 more source
Humans are not unique: difficult birth is common in placental mammals
Biological Reviews, EarlyView.ABSTRACT Human childbirth is widely presumed to be uniquely difficult and dangerous compared to birth in other mammals. Tight fetopelvic proportions can result in obstructed labour and contribute to high rates of maternal and neonatal mortality. Ideas summarised under the ‘obstetrical dilemma’ have contributed to this assumption by explaining difficult
Nicole D. S. Grunstra
wiley +1 more source