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1,014 results for “hairs”
Text-fig. 2. Trichopeziza lizonii (PRM 758484, holotype). a. hairs; b. ascospores; c. young ascus with crozier; d. ascus; e. paraphyses. Scale bars: a, b-e = 10 µm. in A Revision Of Trichopeziza Lizonii, T. Sulphurea And T. Violascens (Ascomycota, Helotiales) From The Herbarium Prm With Notes On Type Material Of Peziza Sulphurea
Text-fig. 2. Trichopeziza lizonii (PRM 758484, holotype). a. hairs; b. ascospores; c. young ascus with crozier; d. ascus; e. paraphyses. Scale bars: a, b-e = 10 µm.
FIGURE 2. Leaf hairs from a in A new combination in Leontodon (Asteraceae, Cichorieae)
FIGURE 2. Leaf hairs from a specimen collected on Mt. Nëmerçkë.
Data from: Macrophages contribute to the cyclic activation of adult hair follicle stem cells
Skin epithelial stem cells operate within a complex signaling milieu that orchestrates their lifetime regenerative properties. The question of whether and how immune cells impact on these stem cells within their niche is not well understood. Here we show that skin-resident macrophages decrease in number because of apoptosis before the onset of epithelial hair follicle stem cell activation during the murine hair cycle. This process is linked to distinct gene expression, including Wnt transcription. Interestingly, by mimicking this event through the selective induction of macrophage apoptosis in early telogen, we identify a novel involvement of macrophages in stem cell activation in vivo. Importantly, the macrophage-specific pharmacological inhibition of Wnt production delays hair follicle growth. Thus, perifollicular macrophages contribute to the activation of skin epithelial stem cells as a novel, additional cue that regulates their regenerative activity. This finding may have translational implications for skin repair, inflammatory skin diseases and cancer.
Data from: Mechanotransduction current is essential for stability of the transducing stereocilia in mammalian auditory hair cells
Mechanotransducer channels at the tips of sensory stereocilia of inner ear hair cells are gated by the tension of 'tip links' interconnecting stereocilia. To ensure maximal sensitivity, tip links are tensioned at rest, resulting in a continuous influx of Ca2+ into the cell. Here we show that this constitutive Ca2+ influx, usually considered as potentially deleterious for hair cells, is in fact essential for stereocilia stability. In the auditory hair cells of young postnatal mice and rats, a reduction in mechanotransducer current, via pharmacological channel blockers or disruption of tip links, leads to stereocilia shape changes and shortening. These effects occur only in stereocilia that harbor mechanotransducer channels, recover upon blocker washout or tip link regeneration, and can be replicated by manipulations of extracellular Ca2+ or intracellular Ca2+ buffering. Thus, our data provide the first experimental evidence for the dynamic control of stereocilia morphology by the mechanotransduction current.
Data from: Transcriptomic inspection revealed a possible pathway regulating the formation of the high-quality brush hair in Chinese Haimen goat (Capra hircus)
The high-quality brush hair, or Type III brush hair, is coarse hair but with a tip and little medulla, which uniquely grows in the cervical carina of Chinese Haimen goat (Capra hircus). To unveil the mechanism of the formation of Type III brush hair in Haimen goats, transcriptomic RNAseq technology was used for screening of differentially expressed genes (DEGs) in the skin samples of the Type III and the non-Type III hair goats, and these DEGs were analysed by KEGG pathway analysis. The results showed that a total of 295 DEGs were obtained, mainly from three main functional types: cellular component, molecular function and biological process. These DEGs were mainly enriched in three KEGG pathways, such as protein processing in endoplasmic reticulum, MAPK, and complement and coagulation cascades. These DEGs gave hints to a possible mechanism, under which heat stress possibly initiated the formation. The study provided some useful biological information, which could give a new view about the roles of certain factors in hair growth and give hints on the mechanism of the formation of the Type III brush hair in Chinese Haimen goat.
Figure 10 in Can hair width and scale pattern and direction of dorsal scapular mammalian hair be a relatively simple means to identify species?
Figure 10. Boxplot of 30 guard hair widths for each species including quartile ranges.
Inner hair cell dysfunction in Klhl18 mutant mice leads to low frequency progressive hearing loss
<p>Age-related hearing loss in humans (presbycusis) typically involves impairment of high frequency sensitivity before becoming progressively more severe at lower frequencies. Pathologies initially affecting lower frequency regions of hearing are less common. Here we describe a progressive, predominantly low-frequency recessive hearing impairment in two mutant mouse lines carrying different mutant alleles of the <i>Klhl18</i> gene: a spontaneous missense mutation (<i>Klhl18<sup>lowf</sup></i>) and a targeted mutation (<i>Klhl18<sup>tm1a(KOMP)Wtsi</sup></i>). Both males and females were studied, and the two mutant lines showed similar phenotypes. Threshold for auditory brainstem responses (ABR; a measure of auditory nerve and brainstem neural activity) were normal at 3 weeks old but showed progressive increases from 4 weeks onwards. In contrast, distortion product otoacoustic emission (DPOAE) sensitivity and amplitudes (a reflection of cochlear outer hair cell function) remained normal in mutants. Electrophysiological recordings from the round window of <i>Klhl18<sup>lowf</sup></i> mutants at 6 weeks old revealed 1) raised compound action potential thresholds that were similar to ABR thresholds, 2) cochlear microphonic potentials that were normal compared with wildtype and heterozygous control mice and 3) summating potentials that were reduced in amplitude compared to control mice. Scanning electron microscopy showed that <i>Klhl18<sup>lowf</sup></i> mutant mice had abnormally tapering of the tips of inner hair cell stereocilia in the apical half of the cochlea while their synapses appeared normal. These results suggest that Klhl18 is necessary to maintain inner hair cell stereocilia and normal inner hair cell function at low frequencies.</p>
Figures 15-20 from: Rightmyer M, Deyrup M, Ascher J (2011) Osmia species (Hymenoptera, Megachilidae) from the southeastern United States with modified facial hairs: taxonomy, host plants, and conservation status. ZooKeys 148: 257-278. https://doi.org/10.3897/zookeys.148.1497
Figures 15-20 - 15, 16 Osmia calaminthae, females 15 Propodeal triangle of paratype specimen 16 T1–T3 of holotype specimen 17–20 Osmia calaminthae, male paratype 17 Dorsal habitus 18 Lateral habitus 19 Face 20 Mandibles
Figures 1-3 from: Rightmyer M, Deyrup M, Ascher J (2011) Osmia species (Hymenoptera, Megachilidae) from the southeastern United States with modified facial hairs: taxonomy, host plants, and conservation status. ZooKeys 148: 257-278. https://doi.org/10.3897/zookeys.148.1497
Figures 1-3 - 1 Flowers of Calamintha ashei (Weath.) Shinners (Lamiaceae) 2–3 Osmia calaminthae, sp. n., visiting flowers of Calamintha ashei at Lake Placid, Highlands County, Florida. Photographs by T. Lethbridge.
Figures 27-32 from: Rightmyer M, Deyrup M, Ascher J (2011) Osmia species (Hymenoptera, Megachilidae) from the southeastern United States with modified facial hairs: taxonomy, host plants, and conservation status. ZooKeys 148: 257-278. https://doi.org/10.3897/zookeys.148.1497
Figures 27-32 - Osmia conjunctoides (female holotype of Osmia subfasciata miamiensis) 27 Dorsal view. 28 Face 29 Mandible, showing the shape and placement of teeth 30 Mandible, showing outer and condylar ridges and overall shape 31 Propodeal triangle 32 T1–T3.
Figures 21-26 from: Rightmyer M, Deyrup M, Ascher J (2011) Osmia species (Hymenoptera, Megachilidae) from the southeastern United States with modified facial hairs: taxonomy, host plants, and conservation status. ZooKeys 148: 257-278. https://doi.org/10.3897/zookeys.148.1497
Figures 21-26 - Osmia calaminthae, male paratypes 21 Propodeal triangle 22 T6 and T7 23 S3 and S4, dorsal view 24 S3 and S4, oblique view 25 Genital capsule, dorsal view 26 Genital capsule, lateral view.
Figures 5-8 from: Rightmyer M, Deyrup M, Ascher J (2011) Osmia species (Hymenoptera, Megachilidae) from the southeastern United States with modified facial hairs: taxonomy, host plants, and conservation status. ZooKeys 148: 257-278. https://doi.org/10.3897/zookeys.148.1497
Figures 5-8 - Oblique view of female Osmia heads 5, 6 Osmia calaminthae, holotype specimen 6 Close up of clypeus and paraocular area 7 Osmia calaminthae, paratype specimen, showing pollen mass on face 8 Osmia conjunctoides (holotype specimen of Osmia subfasciata miamiensis).
Figures 9-14 from: Rightmyer M, Deyrup M, Ascher J (2011) Osmia species (Hymenoptera, Megachilidae) from the southeastern United States with modified facial hairs: taxonomy, host plants, and conservation status. ZooKeys 148: 257-278. https://doi.org/10.3897/zookeys.148.1497
Figures 9-14 - Osmia calaminthae, holotype female 9 Dorsal habitus 10 Lateral habitus 11 Face 12 Close up of clypeus and paraocular area 13 Mandible, showing the shape and placement of teeth 14 Mandible, showing outer and condylar ridges and overall shape.
Figure 4 from: Rightmyer M, Deyrup M, Ascher J (2011) Osmia species (Hymenoptera, Megachilidae) from the southeastern United States with modified facial hairs: taxonomy, host plants, and conservation status. ZooKeys 148: 257-278. https://doi.org/10.3897/zookeys.148.1497
Figure 4 - Habitus illustration of Calamintha ashei, the only known floral host of Osmia calaminthae sp. n. Illustration by M. Deyrup.
Text-fig. 15. Scanning electron microscope (SEM) images of stamen with "Asteropollis-type pollen sp. 2"; Catefica locality, Portugal. a) Stamen with pollen in situ showing the dome-shaped extension of the connective with hairs; b–d) Pollen in situ in stamen in (a) showing poorly defined pentachotomocolpate (b, d) and possibly tetrachotomocolpate (c) apertures and semitectate-reticulate tectum; e) Detail of broken pollen grains showing the loosely attached reticulum, long scattered columellae and thick foot layer. Specimen, Catefica 49-S101209 (a–e). Scale bars = 600 Μm (a), 6 Μm (b–e). in The Early Cretaceous Mesofossil Flora Of Catefica, Portugal: Angiosperms
Text-fig. 15. Scanning electron microscope (SEM) images of stamen with "Asteropollis-type pollen sp. 2"; Catefica locality, Portugal. a) Stamen with pollen in situ showing the dome-shaped extension of the connective with hairs; b–d) Pollen in situ in stamen in (a) showing poorly defined pentachotomocolpate (b, d) and possibly tetrachotomocolpate (c) apertures and semitectate-reticulate tectum; e) Detail of broken pollen grains showing the loosely attached reticulum, long scattered columellae and thick foot layer. Specimen, Catefica 49-S101209 (a–e). Scale bars = 600 Μm (a), 6 Μm (b–e).
Combined Use of Povidone-Iodine and Rifampicin in Hair Transplantation
ClinicalTrials.gov study NCT07155408. IPD Sharing: NO. Countries: 1. Publications: 0.
Portable Scalp Cooling System (PSCS) to Prevent Hair Loss for Breast Cancer Patients (Cooler Heads)
ClinicalTrials.gov study NCT06215469. IPD Sharing: YES. Countries: 1. Publications: 0.
Clinical Evaluation of Hair Removal and Permanent Hair Reduction for Skin Types VI Using Intense Pulsed Light
ClinicalTrials.gov study NCT02452398. IPD Sharing: Not stated. Countries: 1. Publications: 0.
Scalp Cooling to Prevent Hair Loss in Patients Undergoing Stem Cell Transplantation for Multiple Myeloma
ClinicalTrials.gov study NCT05961215. IPD Sharing: NO. Countries: 1. Publications: 0.
Viviscal Extra-Strength Formulation To Promote Hair Growth And Decrease Shedding In Women With Thinning Hair
ClinicalTrials.gov study NCT02297360. IPD Sharing: Not stated. Countries: 0. Publications: 1.
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Allen Brain Atlas
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