Detection of red tides (harmful algal blooms or HABs) from space has been problematic in optically complex waters, mainly due to interference from non-pigment constituents to the satellite signal. Using in situ and MERIS (Medium Resolution Imaging Spectrometer) measurements, the spectral characteristics of red tide and non-red tide waters were studied in the East China Sea coastal area. Two sur...

Methods. Peripheral blood lymphocytes were prepared from 67 anonymous males. The cells were embedded in agarose and the genomic DNA digested with restriction enzyme Not I. The resulting DNA fragments were resolved on a contour-clamped homogeneous electric field gel, and the Not I fragment containing the red and green pigment genes was visualized by Southern blot hybridization with a human green...

Deutan observers are a heterogeneous group, varying nearly continuously from deuteranomalous trichromats with fine chromatic discrimination in the red/green range to deuteranopes who have none. We sought to relate chromatic discriminative ability among deutans measured psychophysically (phenotypes) to observers' separation between long-wave visual pigments inferred from visual pigment genes (ge...

The application of organic dyes in industry is severely limited due to its insolubility and instability. adsorption by inorganic materials form hybrid pigment a valid method improve stability, thus widening applications industries. A simple for preparing stable adsorpting Acid Red 73 (AR73) on the chitosan (CTS) modified sepiolite with SiO2 coating explored this work. Sepiolite CTS was used imm...

HE red and brown eye pigments of Drosophila melanogaster are different T in their properties and developmental history. The formation of the brown pigment depends on diffusible substances derived from tryptophane; that of the red pigment apparently does not. Hence, a t least the final stages of the reaction chains leading to the formation of these pigments follow different paths. However, some ...

Effects of temperature on the spectral properties of visual pigments were measured in the physiological range (5-28 degrees C) in photoreceptor cells of bullfrog (Rana catesbeiana) and crucian carp (Carassius carassius). Absorbance spectra recorded by microspectrophotometry (MSP) in single cells and sensitivity spectra recorded by electroretinography (ERG) across the isolated retina were combin...

• Tannins are the main class of polyphenolic compounds thought to contribute to astringency. The Harbertson/Adams assay allows for the measurement of the various phenolic fractions in a wine: tannin, large polymeric pigment (LPP), small polymeric pigment (SPP), and anthocyanin (see Summaries #4 and #28). The goal of these authors was to explore the relationship between perceived astringency and...

Continuous irradiation of Mougeotia with linearly polarized green light (550 nanometers, 0.2 watt per square meter) induces a change in the orientation of its chloroplast from profile to face position, if the electrical vector of the green light is vibrating normal to the cell axis. This change is complete within 25 minutes of the onset of irradiation. In contrast, if the electrical vector of t...

Turnip seedlings (Brassica rapa L.) irradiated for 24 hours with radiation at 720 nanometers synthesize chlorophyll a and anthocyanin. Antimycin A and 2,4-dinitrophenol, which are known to reduce cyclic photophosphorylation, also reduce anthocyanin synthesis. Noncyclic photophosphorylation is inhibited by 3-(3,4-dichlorophenyl)-1,1-dimethylurea and o-phenanthroline. These compounds promote cycl...