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264 results for “Odorants”
Active sensing in bees through antennal movements is independent of odor molecule (Exemple videos)
<p>Exemple videos demanded by the reviewers to illustrate particular behaviors of the insects or details of the experimental setup. Please see the relevant section in the response document.</p>
Active sensing in bees through antennal movements is independent of odor molecule (Article videos)
<p>Exemple videos referenced in the paper to illustrate particular behaviors of the insects. Please see the relevant section in the supplementary material.</p>
Spatiotemporal dynamics of odor representations in the human brain revealed by EEG decoding
<p>This is the data and script that reproduces the results of the paper:<br> Kato et al., PNAS 2022, Spatiotemporal dynamics of odor representations in the human brain revealed by EEG decoding.<br> As the results of each analysis that are needed for other analysis are also contained in this folder, <br> each sub-section of the script can be run independently (e.g., you can plot OERP waveforms or GFPs without executing preprocessing). <br> Refer to README.txt for detailed discription.</p>
Odor cueing during sleep improves consolidation of a history lesson in a school setting
<p>Sleep is a key factor in memory consolidation. During sleep, information is reactivated, transferred, and redistributed to neocortical areas, thus favoring memory consolidation and integration. Although these reactivations occur spontaneously, they can also be induced using external cues, such as sound or odor cues, linked to the acquired information. Hence, targeted memory reactivation during sleep represents an advantageous tool for improving memory consolidation in real-life settings. In this study, our goal was to improve the consolidation of complex information such as that of a history lesson, using a school study session in the presence of an odor, and a reactivation round while sleeping at home on the same night of the acquisition, without using additional study sessions. We found that complex information can be associated with an odor in the classroom and that one session of reactivation during the first night of sleep in the students’ houses improves its consolidation. These results bring new evidence for the implementation of reactivation during sleep in real-life settings.</p>
Comparative transcriptomics and phylostratigraphy of Argentine ant odorant receptors
<p>Nestmate recognition in ants is regulated through the detection of cuticular hydrocarbons by odorant receptors (ORs) in the antennae. These ORs are crucial for maintaining colony cohesion that allows invasive ant species to dominate colonized environments. In the invasive Argentine ant, <em>Linepithema humile</em>, ORs regulating nestmate recognition are thought to be present in a clade of nine exon odorant receptors, but the identity of the specific genes remains unknown. We sought to narrow down the list of candidate genes using transcriptomics and phylostratigraphy. Comparative transcriptomic analyses were conducted on the antennae, head, thorax, and legs of Argentine ant workers. We have identified a set of twenty-one nine-exon odorant receptors enriched in the antennae compared to the other tissues, allowing for downstream verification of whether they can detect Argentine ant cuticular hydrocarbons. Further investigation of these ORs could allow us to further understand the mechanisms underlying nestmate recognition and colony cohesion in ants.</p>
Males following a terminal investment strategy can fake their body odors to females, yet they cannot fake the odor of their microbiome
<p><span>Terminal investment and dishonesty are likely the only strategies by which sick males in our study could attract females to reproduce. We show that immunocompromised male yellow mealworm beetles (<em>Tenebrio molitor</em>) employing a terminal investment strategy can fake their bodily sex pheromones to females, yet they cannot fake the fecal odor of their microbiome. The results of this study have important methodological recommendations for future studies in the field of terminal investment strategy, showing the need to consider the role of sex odors and signals produced by the microbiome.</span></p>
Adult-born neurons boost odor-reward association
<p>Row data from main manuscript figures</p>
Odors of non-predatory species help prey moderate their risk assessment
<ol> <li><span>Prey use contemporary information to update their risk estimation, and accordingly, optimize their anti-predator reactions. Conceptualization of this process is largely focused on information that reflects predator activity. We aimed to complement this unilateral view by testing whether prey also use cues of non-predatory species to update their risk perception. </span></li> <li><span>We focused our investigation on the desert isopod <i>Hemilepistus reaumuri</i> that reacts defensively to excavated soil mounds, even in the absence of direct predator cues. We located in the field 18 isopod burrows and surrounded each with six soil mounds. One mound remained odorless, and the other five were supplemented with odors of a major isopod predator, the golden scorpion, and four sympatric species that do not prey on isopods, but excavate soil. </span></li> <li><span>Isopods augmented their defensive responses toward mounds supplemented by scorpion odors and lessened their anti-predator reactions toward mounds with odors of herbivore rodents. Isopods' responses to the odors of the two insectivorous species that do not eat isopods were similar to the reaction towards the odorless control mounds. </span></li> <li><span>Our results suggest that prey use non-predatory species cues to moderate their risk estimation. Therefore, we need to consider this potentially important source of information in studies of predator-prey interactions. Our findings also indicate cues of non-predatory species may not be adequate as control treatments to predator cues.</span></li> </ol>
Transgenerational inheritance of learned preferences for novel host plant odors in Bicyclus anynana butterflies
<p>Many phytophagous insects have strong preferences for their host plants, which they recognize via odors, making it unclear how novel host preferences develop in the course of insect diversification. Insects may learn to prefer new host plants via exposure to their odors and pass this learned preference to their offspring. We tested this hypothesis by examining larval odor preferences before and after feeding them with leaves coated with control and novel odors and by examining odor preferences again in their offspring. Larvae of the parental generation developed a preference for two of these odors over their development. These odor preferences were also transmitted to the next generation. Offspring of butterflies fed on these new odors chose these odors more often than offspring of butterflies fed on control leaves. In addition, offspring of butterflies fed on banana odors had a significant naïve preference for the banana odors in contrast to the naïve preference for control leaves shown by individuals of the parental generation. Thus, butterflies can learn to prefer novel host plant odors via exposure to them during larval development and transmit these learned preferences to their offspring. This ability potentially facilitates shifts in host plant use over the course of insect diversification.</p>
PLATE 12. Figures 1–5. Tolpia species, male genitalia. 1, T. odor, slide 5001 in Revision of the Micronoctuidae (Lepidoptera: Noctuoidea). Part 1, Taxonomy of the Pollexinae
PLATE 12. Figures 1–5. Tolpia species, male genitalia. 1, T. odor, slide 5001, Thailand, Mae Hong Son; 2, T. unguis, slide 5003, Thailand, Mae Hong Son; 3, T. sikkimi, slide 3090, India N, Sikkim; 4, T. bhutani, slide 3390, Bhutan; 5, T. indiai, slide 4090, India S, Nilgiri Hills.
Data from: Odor motion sensing enhances navigation of complex plumes
<p>Odor plumes in the wild are spatially complex and rapidly fluctuating structures carried by turbulent airflows. To successfully navigate plumes in search of food and mates, insects must extract and integrate multiple features of the odor signal, including odor identity, intensity, and timing. Effective navigation requires balancing these multiple streams of olfactory information and integrating them with other sensory inputs, including visual and mechanosensory cues. Studies dating back a century have indicated that, of these many sensory inputs, the wind provides the main directional cue in turbulent plumes, leading to the longstanding model of insect odor navigation as odor-elicited upwind motion. Here, we show that <em>Drosophila</em> shape their navigational decisions using an additional directional cue – <em>the direction of motion of odors</em> – which they detect using temporal correlations in the odor signal between their two antennae. Using a high-resolution virtual reality paradigm to deliver spatiotemporally complex fictive odors to freely-walking flies, we demonstrate that such odor direction sensing employs algorithms analogous to those in visual direction sensing. Combining simulations, theory, and experiments, we show that odor motion contains valuable directional information absent from the airflow alone and that both Drosophila and virtual agents are aided by that information in navigating naturalistic plumes. The generality of our findings suggests that odor direction sensing may exist throughout the animal kingdom and could improve olfactory robot navigation in uncertain environments. </p>
Odors to Insufflate Life
ClinicalTrials.gov study NCT02851979. IPD Sharing: NO. Countries: 1. Publications: 1.
An Open Label, Blinded Assessor, Trial Comparing Odor Levels Due to Different Hygiene Methods With PrePexTM
ClinicalTrials.gov study NCT02153658. IPD Sharing: Not stated. Countries: 1. Publications: 1.
Effects of Liraglutid, Dapagliflozin and Acarbose on the Cognitive Function, Olfactory Function, and Odor-induced Brain Activation in Overweight/Obese T2DM Patients Controlled Inadequately With Metfor
ClinicalTrials.gov study NCT03961659. IPD Sharing: Not stated. Countries: 1. Publications: 1.
Efficacy of (WaterWorks®)Douching Device for Elimination of Perceived Vaginal Odor Not Caused by BV or Vaginitis
ClinicalTrials.gov study NCT00417365. IPD Sharing: Not stated. Countries: 1. Publications: 1.
A Study of Efficacy of Benzoyl Peroxide Regimens in Treatment of Unpleasant Foot Odor
ClinicalTrials.gov study NCT04000347. IPD Sharing: NO. Countries: 1. Publications: 15.
A Study of Efficacy of Zinc Oxide Nanoparticles Coated Socks in Prevention of Unpleasant Foot Odor
ClinicalTrials.gov study NCT04000386. IPD Sharing: UNDECIDED. Countries: 1. Publications: 16.
Effect of Rose Odor Exposure on Ictal Apnea
ClinicalTrials.gov study NCT07116421. IPD Sharing: YES. Countries: 1. Publications: 9.
Premature Newborn Pain Management: The Effects of Breast Milk Odor and White Noise
ClinicalTrials.gov study NCT05444608. IPD Sharing: Not stated. Countries: 1. Publications: 19.
The evolution of sexual signaling is linked to odorant receptor tuning in perfume-collecting orchid bees
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