A5027642388- Photochromic and Fluorescence Chemistry
- X-ray Diffraction in Crystallography
- Crustacean biology and ecology
- Crystallization and Solubility Studies
- Coral and Marine Ecosystems Studies
- Calcium Carbonate Crystallization and Inhibition
- Marine and coastal plant biology
- Bone Tissue Engineering Materials
- Amphibian and Reptile Biology
- Phytochemistry and Bioactivity Studies
- Neurobiology and Insect Physiology Research
- Photoreceptor and optogenetics research
- Crystallography and molecular interactions
- Animal Behavior and Reproduction
- Paleontology and Stratigraphy of Fossils
Ben-Gurion University of the Negev
2022-2023
Weizmann Institute of Science
2019
Instituto Andaluz de Ciencias de la Tierra
2017
Highly reflective crystals of the nucleotide base guanine are widely distributed in animal coloration and visual systems. Organisms precisely control morphology organization to optimize different optical effects, but little is known about how this achieved. Here we examine a fundamental question that has remained unanswered after over 100 years research on guanine:
Many oceanic prey animals use transparent bodies to avoid detection. However, conspicuous eye pigments, required for vision, compromise the organisms' ability remain unseen. We report discovery of a reflector overlying pigments in larval decapod crustaceans and show how it is tuned render organisms inconspicuous against background. The ultracompact constructed from photonic glass crystalline isoxanthopterin nanospheres. nanospheres' size ordering are modulated tune reflectance deep blue...
The precipitation of calcium carbonate into alkaline silica gel produces concomitant polymorphic aragonite with biomorphic morphology and calcite crystalline dendrites.
The eyes of many fish contain a reflecting layer organic crystals partially surrounding the photoreceptors retina, which are commonly believed to be composed guanine. Here we study an unusual eye from Stizostedion lucioperca that contains two layers crystals. in outer thin plates, whereas inner tapetum block-shaped. We show indeed guanine Analyses solutions indicated block-shaped xanthopterin. A model structure was produced using symmetry arguments based on electron diffraction data followed...
Many animals undergo changes in functional colors during development, requiring the replacement of integument or pigment cells. A classic example defensive color switching is found hatchling lizards, which use conspicuous tail to deflect predator attacks away from vital organs. These usually fade concealing ontogeny. Here, we show that ontogenetic blue-to-brown change Acanthodactylus beershebensis lizards results changing optical properties single types developing chromatophore The blue...