Results 51 to 60 of about 79,741 (214)

Instability of some divalent rare earth ions and photochromic effect

, 2015
It was shown that the divalent rare earth ions (La, Ce, Gd, Tb, Lu, and Y) in cubic sites in alkaline earth fluorides are unstable with respect to electron autodetachment since its d1(eg) ground state is located in the conduction band which is consistent
Egranov, A. V., Shendrik, R. Yu., Sizova, T. Yu., Smirnova, N. A.   +3 more
core   +1 more source

Study Of Oxidation Processes In Duck Meat With Application Of Rosemary And Grape Seed Extracts [PDF]

, 2017
The substantiation of the expedience of using antioxidants of a natural origin to decelerate oxidation processes in different meat products is an urgent direction of these studies.
Bozhko, N. (Nataliia), Marynin, A. (Andriy), Pasichnyi, V. (Vasil), Polumbryk, M. (Maksym), Tischenko, V. (Vasyl)   +4 more
core   +2 more sources

Mechanisms Underlying Segmentation of Colored Textures

Vision Research, 1997
This paper examines the nature of the post-receptoral chromatic and achromatic mechanisms involved in a texture segmentation task. Observers viewed a 64 x 64 square-element texture in which the chromaticity and brightness of each element was drawn from a one-dimensional Gaussian distribution of values centered at a white point in color space.
LI, ANDREA, LENNIE, PETER
openaire   +2 more sources

A new understanding on the electrochemical coloration mechanism of titanium surface

Journal of Materials Research and Technology
Electrochemical coloration technology has been extensively studied for many years due to its effectiveness in enhancing the aesthetics, corrosion resistance, and biocompatibility of Ti materials.
Tengfei Yu, Yanpeng Xue, Man Zheng, Benli Luan   +3 more
doaj   +1 more source

Cognitive dimensions of predator responses to imperfect mimicry? [PDF]

, 2007
Many palatable insects, for example hoverflies, deter predators by mimicking well-defended insects such as wasps. However, for human observers, these flies often seem to be little better than caricatures of wasps – their visual appearance and ...
Lars Chittka, Daniel Osorio, Gilbert, Mostler, Harper, Ruxton, Rowland, Williams, Rowe, Dittrich, Sherratt, Ham, Johnstone, Brodie, Speed, Markl, Menzel, Wolfe, Abraham, Chittka, Dyer, Ditterich, Heekeren, Chittka, Chittka, Passino, Franks, Howse, Baddeley, Jones, Huber, Cerella, Plowright, Bain, Cuthill, Stevens, Darst, Ruxton, Skelhorn   +38 more
core   +3 more sources

Evolution of female carotenoid coloration by sexual constraint in Carduelis finches

BMC Evolutionary Biology, 2010
Background Females often express the same ornaments as males to a similar or lesser degree. Female ornaments can be adaptive, but little is known regarding their origins and mode of evolution.
Cardoso Gonçalo C, Mota Paulo
doaj   +1 more source

Perturbations in growth trajectory due to early diet affect age-related deterioration in performance [PDF]

, 2015
Fluctuations in early developmental conditions can cause changes in growth trajectories that subsequently affect the adult phenotype. Here, we investigated whether compensatory growth has long-term consequences for patterns of senescence.
Galloway T.F., Metcalfe N.B., Partridge L., Roff D.A., Rose M.R., Samuels S.E., Sogard S.M., Stearns S.C., Team, R.D.C.   +8 more
core   +2 more sources

p-Type semiconducting properties in lithium-doped MgO single crystals

, 2002
The phenomenally large enhancement in conductivity observed when Li-doped MgO crystals are oxidized at elevated temperatures was investigated by dc and ac electrical measurements in the temperature interval 250-673 K.
B. Evans, B. Henderson, D. Emin, D.J. Eisenberg, F.G. Will, H. Frölich, H.A. Wang, I. Freidman, J. Narayan, M. M. Tardío, M. Pollak, M. Puma, M. Tardío, M. Tardío, M.M. Abraham, M.M. Abraham, M.M. Abraham, O.F. Schirmer, R. González, R. Ramírez, R. Ramírez, R. Ramírez, R. Vila, S.K. Mohapatra, Y. Chen, Y. Chen, Y. Chen   +26 more
core   +1 more source

The Effect of Heat Treatment on Yellow-Green Beryl Color and Its Enhancement Mechanism

Crystals
Beryl is classified as a cyclosilicate mineral, and its color is primarily determined by the type and oxidation state of trace elements. In this study, natural yellow-green beryl was used as the research subject, and heat treatment experiments were ...
Binru Hao, Shuxin Zhao, Qingfeng Guo
doaj   +1 more source

Metabolome and transcriptome analyses of the molecular mechanisms of flower color mutation in tobacco

BMC Genomics, 2020
Background Anthocyanins determinate the flower color of many plants. Tobacco is a model plant for studying the molecular regulation of flower coloration.
Fangchan Jiao, Lu Zhao, Xingfu Wu, Zhongbang Song, Yongping Li   +4 more
doaj   +1 more source