Eye Color Changes Due to Pigment Migration in Some Species of Heteroptera and Homoptera

1989 ◽  
Vol 72 (4) ◽  
pp. 637
Author(s):  
F. W. Howard ◽  
Barbara J. Center ◽  
F. W. Mead
Keyword(s):  
Eye Color ◽  
Color Changes ◽  
Pigment Migration

scholarly journals Recent Advancements in Enzyme-Based Lateral Flow Immunoassays

Sensors ◽  
2021 ◽  
Vol 21 (10) ◽  
pp. 3358
Author(s):  
Donato Calabria ◽  
Maria Maddalena Calabretta ◽  
Martina Zangheri ◽  
Elisa Marchegiani ◽  
Ilaria Trozzi ◽  
...  
Keyword(s):  
Lateral Flow ◽  
Qualitative Information ◽  
Eye Color ◽  
Commercial Success ◽  
Color Changes ◽  
Naked Eye ◽  
Future Developments ◽  
Highly Sensitive ◽  
Critical Overview ◽  
Detection Technologies

Paper-based lateral-flow immunoassays (LFIAs) have achieved considerable commercial success and their impact in diagnostics is continuously growing. LFIA results are often obtained by visualizing by the naked eye color changes in given areas, providing a qualitative information about the presence/absence of the target analyte in the sample. However, this platform has the potential to provide ultrasensitive quantitative analysis for several applications. Indeed, LFIA is based on well-established immunological techniques, which have known in the last year great advances due to the combination of highly sensitive tracers, innovative signal amplification strategies and last-generation instrumental detectors. All these available progresses can be applied also to the LFIA platform by adapting them to a portable and miniaturized format. This possibility opens countless strategies for definitively turning the LFIA technique into an ultrasensitive quantitative method. Among the different proposals for achieving this goal, the use of enzyme-based immunoassay is very well known and widespread for routine analysis and it can represent a valid approach for improving LFIA performances. Several examples have been recently reported in literature exploiting enzymes properties and features for obtaining significative advances in this field. In this review, we aim to provide a critical overview of the recent progresses in highly sensitive LFIA detection technologies, involving the exploitation of enzyme-based amplification strategies. The features and applications of the technologies, along with future developments and challenges, are also discussed.

Freshness assessment of gilthead sea bream (Sparus aurata) by machine vision based on gill and eye color changes

2013 ◽  
Vol 119 (2) ◽  
pp. 277-287 ◽  
Author(s):  
Majid Dowlati ◽  
Seyed Saeid Mohtasebi ◽  
Mahmoud Omid ◽  
Seyed Hadi Razavi ◽  
Mansour Jamzad ◽  
...  
Keyword(s):  
Machine Vision ◽  
Sparus Aurata ◽  
Gilthead Sea Bream ◽  
Sea Bream ◽  
Eye Color ◽  
Color Changes

Attending to Faces: Change Detection, Familiarization, and Inversion Effects

Perception ◽  
10.1068/p3460 ◽  
2003 ◽  
Vol 32 (1) ◽  
pp. 15-28 ◽  
Author(s):  
Jason J S Barton ◽  
Shaunak Deepak ◽  
Numaan Malik
Keyword(s):  
Change Detection ◽  
Spatial Relations ◽  
Eye Position ◽  
Short Term ◽  
Four Dimensions ◽  
Eye Color ◽  
Color Changes ◽  
Mouth Color ◽  
And Inversion ◽  
Inversion Effects

We tested detection of changes to eye position, eye color (brightness), mouth position, and mouth color in frontal views of faces. Two faces were presented sequentially for 555 ms each, with a blank screen of 120 ms separating the two. Faces were presented either both upright or both inverted. Measures of detection ( d') were calculated for several different degrees of change for each of the four dimensions of change. We first compared results to an earlier experiment that used an oddity design, in which subjects indicated which of three simultaneously viewed and otherwise identical faces had been altered on one of these four dimensions. Subjects in both of these experiments were partially cued, in that they knew the four possible types of changes that could occur on a given trial. The change-detection results correlated well with the oddity data. They confirmed that face inversion had little effect upon detection of changes in eye color, a moderate effect upon detection of eye-position or mouth-color changes, and caused a drastic reduction in the detection of mouth-position changes. An experiment in which uncued and fully cued subjects were compared showed that cueing significantly improved detection of feature color changes, but there was little difference between upright and inverted faces. Full cueing eliminated all effects of inversion. Compared to partial cueing, changes in mouth color were poorly detected by uncued subjects. Last, a change in the frequency of the base (unaltered) face in an experiment from 75% to 40% showed that increased short-term familiarity decreased the detection of eye changes and increased the detection of mouth changes, regardless of face orientation and the type of change made (color or position). We conclude that uncued subjects encode the spatial relations of features more than the colors of features, that mouth color in particular is not considered a relevant dimension for encoding, and that familiarization redistributes attention from more to less salient facial regions. Inversion effects are not simply an exaggeration of the salience effects revealed by withdrawing cueing, but represent an interaction of spatial encoding with salience, in that the greatest inversion effects occur for spatial shifts in less salient facial regions, and can be eliminated through the use of focused attention.

scholarly journals Real-Time Brain Machine Interaction via Social Robot Gesture Control

2017 ◽  
Author(s):  
Reza Abiri ◽  
Soheil Borhani ◽  
Xiaopeng Zhao ◽  
Yang Jiang
Keyword(s):  
Real Time ◽  
Social Robot ◽  
Great Promise ◽  
Robotic Platform ◽  
Eye Color ◽  
Color Changes ◽  
Gesture Control ◽  
Mental Abilities ◽  
Machine Interaction ◽  
Training Protocol

Brain-Machine Interaction (BMI) system motivates interesting and promising results in forward/feedback control consistent with human intention. It holds great promise for advancements in patient care and applications to neurorehabilitation. Here, we propose a novel neurofeedback-based BCI robotic platform using a personalized social robot in order to assist patients having cognitive deficits through bilateral rehabilitation and mental training. For initial testing of the platform, electroencephalography (EEG) brainwaves of a human user were collected in real time during tasks of imaginary movements. First, the brainwaves associated with imagined body kinematics parameters were decoded to control a cursor on a computer screen in training protocol. Then, the experienced subject was able to interact with a social robot via our real-time BMI robotic platform. Corresponding to subject’s imagery performance, he/she received specific gesture movements and eye color changes as neural-based feedback from the robot. This hands-free neurofeedback interaction not only can be used for mind control of a social robot’s movements, but also sets the stage for application to enhancing and recovering mental abilities such as attention via training in humans by providing real-time neurofeedback from a social robot.

Eye-Color Changes during Aggressive Displays in the Goodeid Fishes

Copeia ◽  
1980 ◽  
Vol 1980 (1) ◽  
pp. 169 ◽  
Author(s):  
Dolores Irene Kingston
Keyword(s):  
Eye Color ◽  
Color Changes

scholarly journals MORPHOTYPIC STRUCTURE OF HONEY BEES AND THEIR MORPHOLOGICAL CHANGES

THE BULLETIN ◽  
2020 ◽  
Vol 5 (387) ◽  
pp. 65-72
Author(s):  
V. G. Semenov ◽  
◽  
A. I. Skvortsov ◽  
V. N. Sattarov ◽  
D. A. Baimukanov ◽  
...  
Keyword(s):  
Honey Bees ◽  
Morphological Changes ◽  
Steppe Zone ◽  
Morphological Characters ◽  
Forest Steppe ◽  
Flow Area ◽  
Factors Affecting ◽  
Eye Color ◽  
Color Changes ◽  
Key Aspects

One of the key aspects of the preservation of endemic populations of modern honey bee breeds is research in the identification of their morphological characters in apiaries, as an assessment of the cleanliness of queen bees and the potential for restoration of populations. The research material was a sampling of summer generation bees. The volume amounted to 640 individuals from 16 bee families in three districts of the forest-steppe and steppe honey flow areas (Margaushsky (3 families - apiary of the K.I.Michurin farm firm), Krasnoarmeysky (6 families from Pchelovodcheskoe OOO) - forest-steppe zone; Batyrevsky district (7 families from Pirozhkova N.P. farm) - steppe honey flow area). The assessment was carried out according to the common method, during which 15 traits were measured. The studies of the morphotypic structure of honey bees revealed the dominant conformity of the identified classes of workers and drones to the standard of the Central Russian subspecies. The research results showed that the morphotype of working bees is represented by the prevailing class - O and the minimum represented - 1R. The drones morphotype is represented only by class O. At the same time, a complex methodology, including an analysis of the "purity" of working bees and drones, allows us to note the genetic safety, both on the maternal lineage and the paternal side, respectively. However, studies of morphological abnormalities in Apis mellifera revealed eye color changes only in drones, namely brown or pomegranate and white eyes. The studies have revealed the potential for preservation of the population of the European dark (Central Russian) bee breed in Chuvashia. The decrease in the minimum tergite value recorded in the Morgaushsky district beyond the standard frames of the Central Russian breed does not indicate the ongoing hybridization processes since this is the only one and can be explained by some random factors affecting biophysiological processes.

scholarly journals Does the Behavioral Stress Response of Nile Tilapia, Oreochromis niloticus Breeders During Isolation Influence Seed Production?

2020 ◽  
pp. 208-215
Author(s):  
Emmanuel M. Vera Cruz ◽  
Eddie Boy T. Jimenez ◽  
Bethzaida M. Apongol-Ruiz
Keyword(s):  
Stress Response ◽  
Seed Production ◽  
Social Groups ◽  
Color Pattern ◽  
Eye Color ◽  
Color Changes ◽  
Behavioral Stress ◽  
Nile Tilapia Oreochromis Niloticus ◽  
Breeding Cycles ◽  
Total Seed

This experiment assessed the effect of breeder’s behavioral stress response [i.e., eye color pattern (ECP)] during isolation on O. niloticus seed production. ECP change was marked by fractional color changes of the iris and sclera, which was transformed into scores ranging from 0 (no darkening) to 8 (total darkening). After isolation, breeders were divided into two social groups: proactive breeders (PB) were those with a mean ECP score of <2, and reactive breeders (RB) with a mean ECP score of >6. Two breeding cycles were done in six (1 m x 2 m x 1 m) net enclosures. Mean spawning rates (SR) in PB during the two cycles were 38.89±14.70% and 33.33±8.87% while 3.33±9.62% and 22.22±2.48% in the RB group. Total seed productions (TSP) in PB were 1,906.22±733.72 and 1,681.19±1,070.48 fry, and those in RB were 996.35±218.11 and 461.39±151.37 fry. There were no significant differences between the two groups on SR and TSP in both cycles. On seed production per female that spawned, however, significantly (P<0.05) higher means (796.33±77.68 and 726.33±124.08 fry) were observed in the PB compared to those in RB (522.73±54.68 and 335.83±44.98 fry). These results demonstrated that seed production in O. niloticus could be increased by selecting proactive breeders through the evaluation of their ECP during isolation.

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