Results 81 to 90 of about 225,807 (301)

Are there morpho‐acoustic patterns of adaptation in nonhuman primate ears? Testing the role of ecology and habitat in shaping ear morphology and function

open access: yesThe Anatomical Record, EarlyView.
Abstract Analysis of the variation in the bony structures of the inner and middle ear provides critical insights into functional morphology, as well as adaptive morphology across primates. In this study, we investigated whether ear morphology patterns are related to the ecological characteristics of species and their habitats to test two acoustic ...
Myriam Marsot   +4 more
wiley   +1 more source

Diurnal variation of overdense meteor echo duration and ozone [PDF]

open access: yes
The diurnal variation of the median duration of overdense sporadic radar meteor echoes is examined. The meteors recorded in August, December, and January by the Ondrejov meteor radar during the period 1958-1990 were used for the analysis.
Simek, Milos
core   +1 more source

Increasing leaf hydraulic conductance with transpiration rate minimizes the water potential drawdown from stem to leaf. [PDF]

open access: yes, 2014
Leaf hydraulic conductance (k leaf) is a central element in the regulation of leaf water balance but the properties of k leaf remain uncertain. Here, the evidence for the following two models for k leaf in well-hydrated plants is evaluated: (i) k leaf is
Barbour, Margaret   +5 more
core   +3 more sources

Neuroanatomical diversity in Teleocichla with new volumetric and histological insights into the encephalon of Teleocichla monogramma Kullander 1988

open access: yesThe Anatomical Record, EarlyView.
Abstract Teleocichla comprises small cichlids that inhabit the rapid streams of Amazonian rivers; however, there has been limited research on their encephalon morphology. This study examined the neuroanatomy of four species, focusing on volumetric measurements of their encephalon subregions, and providing a histological description of the encephalon of
Renan Leão‐Reis   +4 more
wiley   +1 more source

General circulation in the atmosphere of Venus driven by polar and diurnal variations of surface temperature [PDF]

open access: yes
Mathematical model for Venus atmosphere circulation pattern determined by polar and diurnal temperature ...
Bohachevsky, I. O., Yeh, T. T. J.
core   +1 more source

Patterns of interspecific variation in labial microarchitecture among anthropoid primates and the evolution of the hominin lips

open access: yesThe 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

Characterization of GPS total electron content (GPS-TEC) in Antarctica from 2004 to 2011

open access: yesAnnals of Geophysics, 2013
The vertical total electron content (VTEC) obtained from 2004 to 2011 at Comandante Ferraz Brazilian Antarctic Station (62.1°S, 58.4°W) is analyzed to study the mean diurnal, seasonal and annual variations.
Emília Correia   +2 more
doaj   +1 more source

Understanding the spacing of placodes in the eye: A comparative study across age and species

open access: yesThe Anatomical Record, EarlyView.
Abstract The conjunctival placodes of the avian eye form in an intriguing and conserved sequence in a circular annulus around the cornea. These 13–16 placodes develop into papillae that are essential for inducing underlying intramembranous flat bones, known as scleral ossicles, which form an important part of the ocular skeleton.
Florence Joseph   +1 more
wiley   +1 more source

Diurnal variation of total cloud cover and cloud type in summer in Xinjiang, China based on FY4A and ERA5

open access: yesJournal of Hydrology: Regional Studies
Study region: Xinjiang, China (XJ). Study focus: This study compared the diurnal variations of ground observation- (OBS-), FY4A- and ERA5-based total cloud cover (TCC) and revealed the diurnal variation of FY4A-based cloud type (CLT) in XJ.
Yong Zeng   +3 more
doaj   +1 more source

Electron densities and temperatures in the f-region from backscatter measurements at arecibo [PDF]

open access: yes
Diurnal variation in electron densities and temperatures in F region from backscatter measurements over Puerto ...
Carlson, H. C., Nisbet, J. S.
core   +1 more source

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