Results 111 to 120 of about 1,449,260 (305)
Visual computation of surface lightness: Local contrast vs. frames of reference
, 2010 Seeing black, white and gray surfaces, called lightness perception, might seem simple because white surfaces reflect 90% of the light they receive while black surfaces reflect only 3%, and the human retina is composed of light sensitive cells.
Alan Gilchrist, Ana Radonjic
core
FEBS Letters, EarlyView.Embryo‐like structures (stembryos) are an innovative tool, but they are hindered by experimental variability and limited developmental potential. DNA methylation is crucial for mammalian development, but its status in stembryo models is poorly characterized.
Sara Canil +4 more
wiley +1 more source
Ovaidan Ultrasound Image Enhancement By Pseudocolouring. [PDF]
, 2004 Image processing may be employed on ovarian ultrasound images to assist doctors in diagnostic analysis. The gray levels of ovarian images are usually concentrated at the zero end of the spectrum ,making the image too low in contrast and too dark for the ...
Mashor, Mohd Yusoff +2 more
core
, 2013 This paper focuses on a functionalist analysis of the patterns followed when translating specific texts from English into Spanish. The original texts are written in English and, afterwards, translated to other languages.
Candel-Mora, Miguel Ángel +1 more
core +1 more source
Small StructuresBlood‐ and blood cell‐derived colloidal materials are gaining traction as platforms for targeted therapeutics, imaging, and theranostics. To fully exploit their potential, high‐resolution insight into their structural and compositional features is ...
Cuong Viet Pham +10 more
doaj +1 more source
Contrast variation SAXS: Sample preparation protocols, experimental procedures, and data analysis. [PDF]
Methods Enzymol, 2022 San Emeterio J, Pabit SA, Pollack L.
europepmc +1 more source
pH‐mediated activation of the lysosomal arginine sensor SLC38A9
FEBS Letters, EarlyView.Cells monitor nutrient levels via the lysosomal transporter SLC38A9 to activate the mechanistic target of rapamycin complex 1 (mTORC1). This study reveals that SLC38A9 function is regulated by pH. We identified histidine 544 as a critical pH sensor that undergoes conformational changes to control amino acid efflux from lysosomes; therefore, it ...
Xuelang Mu, Ampon Sae Her, Tamir Gonen
wiley +1 more source
Effects of Phonological Contrast on Within-Category Phonetic Variation
, 2019 This dissertation investigates an often assumed hypothesis in phonetics and phonology: that there should be relatively less within-category phonetic variation in production in languages which have relatively more phonological contrasts (Lindblom, 1986 ...
Hauser, Ivy
core +1 more source
IEEE Photonics Journal, 2016 We present an optimized attenuation compensation and contrast enhancement algorithm to improve the quality of the intravascular optical coherence tomography (IVOCT) images and overcome the drawbacks of the previous algorithms, including ...
Yonghan Zhou +8 more
doaj +1 more source
Exploiting neutron scattering contrast variation in biological membrane studies. [PDF]
Biophys Rev (Melville), 2022 Lakey JH, Paracini N, Clifton LA.
europepmc +1 more source