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1,162 results for “fiber”
Type I fiber decrease and ectopic fat accumulation in skeletal muscle from women with PCOS
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Synaptopodin regulates denervation-induced plasticity at hippocampal mossy fiber synapses
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Mechanical loading induces the longitudinal growth of muscle fibers via a rapamycin-insensitive mechanism
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Engineered probiotic restores glp-1 signaling to ameliorate fiber-deficiency-exacerbated colitis
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Matlab applications for: A mechanical model to interpret distributed fiber optic strain measurement at displacement discontinuities
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Fig. 5. Correlation between the fibers diameters and body weight from 300 in Morphological and morphometric analysis of skeletal muscle between male and female young adult Colossoma macropomum (Characiformes: Serrasalmidae)
Fig. 5. Correlation between the fibers diameters and body weight from 300 days old Colossoma macropomum. The fibers diameters are showed by class: circle (<20 µm), triangle (20 to 50 µm) and square (>50 µm).
Microelectromechanical-System-Based Design of a High-Finesse Fiber Cavity Integrated with an Ion Trap
<p>We present a numerical study of a microelectromechanical-system-based design of a fiber cavity integrated with an ion-trap system. Each fiber mirror is supported by a microactuator that controls the mirror’s position in three dimensions. The mechanical stability is investigated by a feasibility analysis, which shows that the actuator offers stable support of the fiber. The actuators move the fibers’ positions continuously with a stroke of more than 10μm, with mechanical resonance frequencies on the order of kilohertz. A calculation of the trapping potential shows that a separation between the ion and the fiber consistent with strong ion-cavity coupling is feasible. Our miniaturized ion-photon interface constitutes a viable approach to integrated hardware for quantum information.</p>
Data from: Cold-acclimation increases depolarization resistance and tolerance in muscle fibers from a chill-susceptible insect, Locusta migratoria
<p>Cold exposure depolarizes cells in insects due to a reduced electrogenic ion transport and a gradual increase in extracellular [K<sup>+</sup>]. Cold-induced depolarization is linked to cold injury in chill-susceptible insects, and the locust, <i>Locusta migratoria</i>, has shown improved cold tolerance following cold-acclimation through depolarization resistance. Here we investigate how cold-acclimation influences depolarization resistance and how this resistance relates to improved cold tolerance. To address this question, we investigated if cold-acclimation affects the electrogenic transport capacity and/or the relative K<sup>+</sup> permeability during cold exposure by measuring membrane potentials of warm- and cold-acclimated locusts in the presence/absence of ouabain (Na<sup>+</sup>/K<sup>+</sup> pump blocker) or 4-aminopyridine (4-AP, voltage-gated K<sup>+</sup> channel blocker). In addition, we compared the membrane lipid composition of muscle tissue from warm- and cold-acclimated locust, and the abundance of a range transcripts related to ion transport and cell injury accumulation. We found that cold-acclimated locusts are depolarization resistant due to an elevated K<sup>+</sup> permeability, facilitated by opening of 4-AP sensitive K<sup>+</sup> channels. In accordance, cold-acclimation was associated with an increased abundance of <i>shaker</i> transcripts (gene encoding 4-AP sensitive voltage-gated K<sup>+</sup> channels). Furthermore, we found that cold-acclimation improved muscle cell viability following exposure to cold and hyperkalemia even when muscles were depolarized substantially. Thus, cold-acclimation confers resistance to depolarization by altering the relative ion permeability, but cold-acclimated locusts are also more tolerant to depolarization.</p>
A superfine glass fiber air filter with rapid response to photocatalytic antibacterial properties under visible light by loading rGO/ZnO
<p class="15"> The development of high-performance air filter has become more and more important to public health. However, it has always been very challenging for developing a multifunctional air filter to simultaneously achieve excellent filtration and antibacterial properties. Herein, a versatile air filter was prepared with loading the reduced graphener and Zinc oxide on the superfine glass fiber with the three-dimensional network structure by in-situ sol-gel process followed by calcination, which aims to achieve synergistic high efficiency air filtration and rapid response to photocatalytic antibacterial under visible light. The air filter showed a three-dimensional network structure based on a rGO/ZnO/s-GF multilayer and exhibited the highest catalytic performance by achieving a 95% degradation effect on Rhodamine B within 2 h and achieving 100% antibacterial inactivation of the Escherichia coli and Staphylococcus aureus within 4 h under visible light when the weight ratio of rGO in rGO/ZnO is 1.6%. The air filtration efficiency can also be maintained at 99% after loading Zno and rGO photocatalytic particles. The spectrum of PL, DRS and ERS indicate that the combination of rGO and ZnO on the s-GF can increase the separation of photo-generated carriers and the specific surface area of the air filter, thereby increasing the photocatalytic response and antibacterial properties of the s-GF air filter under visible light in a short time.</p> <p> </p>
Data from: A functional regulatory variant of MYH3 influences muscle fiber-type composition and intramuscular fat content in pigs
Muscle development and lipid accumulation in muscle critically affect meat quality in livestock. Yet, the underlying genetic factors for myofiber-type specification and intramuscular fat (IMF) accumulation remain to be elucidated. Using two independent intercrosses between Western breeds and Korean native pigs (KNPs) and a joint linkage-linkage disequilibrium analysis, we here identified a 488.1-kb region on porcine chromosome 12 that affects both reddish meat color (a*) and IMF. In this critical region, only the MYH3 gene, encoding myosin heavy chain 3, was found to be preferentially overexpressed in the skeletal muscle in KNPs. Subsequently, MYH3-transgenic mice demonstrated that this gene controls both myofiber-type specification and adipogenesis in skeletal muscle. We discovered a structural variant in the promotor/regulatory region of MYH3 for which Q allele carriers exhibited significantly higher values of a* and IMF than q allele carriers. Furthermore, chromatin immunoprecipitation and co-transfection assays showed the structural variant in the 5'-UTR of MYH3 abrogated binding of the myogenic regulatory factors (MYF5, MYOD, MYOG, and MRF4). The allele distribution of the MYH3 among worldwide pig populations indicated that the MYH3 Q allele is of Asian origin and likely predates domestication. In conclusion, we identified a functional regulatory sequence variant in the porcine MYH3 that provides novel insights into the genetic basis of the regulation of myofiber type ratios and associated changes in IMF in pigs. The MYH3 variant can play an important role to improve pork quality in current breeding programs.
FIGURE 3 in Fur mites of the genus Schizocarpus Trouessart (Acari: Chirodiscidae) parasitizing the Eurasian beaver Castor fiber belorussicus Lavrov (Rodentia: Castoridae) in NE Poland (Suwałki)
FIGURE 3. Details of Schizocarpus spp., male: A—S. parahumilis sp. nov. in ventral view; B—same, leg III, in ventral view; C—adanal shield of S. pseudonumerosus sp. nov.; D—adanal shields of S. radiatus Fain and Lukoschus, 1985; E—adanal sucker of S. capitis (Dubinina, 1964) (Photo with Leica microscope).
FIGURE 12 in Fur mites of the genus Schizocarpus Trouessart (Acari: Chirodiscidae) parasitizing the Eurasian beaver Castor fiber belorussicus Lavrov (Rodentia: Castoridae) in NE Poland (Suwałki)
FIGURE 12. Variation in positions of ventral opisthosomal setae in males of Schizocarpus spp.: A, B—S. pygidialis Fain and Lukoschus, 1985; C–E—S. subhexapilis Fain and Lukoschus, 1985.
FIGURE 1 in Fur mites of the genus Schizocarpus Trouessart (Acari: Chirodiscidae) parasitizing the Eurasian beaver Castor fiber belorussicus Lavrov (Rodentia: Castoridae) in NE Poland (Suwałki)
FIGURE 1. Schizocarpus sp., female: A—Ventral view; B—attached to the host hair; C—Anterior legs; D—cuticle posterior to legs II (SEM).
FIGURE 4 in Fur mites of the genus Schizocarpus Trouessart (Acari: Chirodiscidae) from the Eurasian beaver Castor fiber tuvinicus Lavrov (Rodentia: Castoridae) in the Azas River (Tuva Republic, Russia)
FIGURE 4. Schizocarpus unzhakovi sp. nov., male: A—opisthosoma in dorsal view; B—same, in ventral view.
FIGURE 8 in Fur mites of the genus Schizocarpus Trouessart (Acari: Chirodiscidae) from the Eurasian beaver Castor fiber tuvinicus Lavrov (Rodentia: Castoridae) in the Azas River (Tuva Republic, Russia)
FIGURE 8. Variation in positions of ventral opisthosomal setae and shape of adanal shield in males of Schizocarpus brachyurus (Dubinina, 1964). Positions of these structures being typical for the forms intercalatus and parabrachyurus are labeled, respectively.
FIGURE 6 in Fur mites of the genus Schizocarpus Trouessart (Acari: Chirodiscidae) from the Eurasian beaver Castor fiber tuvinicus Lavrov (Rodentia: Castoridae) in the Azas River (Tuva Republic, Russia)
FIGURE 6. Schizocarpus tuvinicus sp. nov., male: A—opisthosoma in dorsal view; B—same, in ventral view.
FIGURE 5 in Fur mites of the genus Schizocarpus Trouessart (Acari: Chirodiscidae) from the Eurasian beaver Castor fiber tuvinicus Lavrov (Rodentia: Castoridae) in the Azas River (Tuva Republic, Russia)
FIGURE 5. Schizocarpus heideckei sp. nov., male: A—opisthosoma in dorsal view; B—same, in ventral view.
FIGURE 7 in Fur mites of the genus Schizocarpus Trouessart (Acari: Chirodiscidae) from the Eurasian beaver Castor fiber tuvinicus Lavrov (Rodentia: Castoridae) in the Azas River (Tuva Republic, Russia)
FIGURE 7. Schizocarpus azasicus sp. nov., male: A—opisthosoma in dorsal view; B—same, in ventral view.
FIGURE 1 in Fur mites of the genus Schizocarpus Trouessart (Acari: Chirodiscidae) from the Eurasian beaver Castor fiber tuvinicus Lavrov (Rodentia: Castoridae) in the Azas River (Tuva Republic, Russia)
FIGURE 1. Castor fiber tuvinicus Lavrov from Azas River, Tuva, Russia, October 2011: A—freshly caught beaver in the hands of A.P. Saveljev; B— dry beaver; C—A.P. Saveljev combs sample of undercoat from beaver's head; D—same but from beaver's abdomen.
FIGURE 2 in Fur mites of the genus Schizocarpus Trouessart (Acari: Chirodiscidae) from the Eurasian beaver Castor fiber tuvinicus Lavrov (Rodentia: Castoridae) in the Azas River (Tuva Republic, Russia)
FIGURE 2. Schizocarpus daberti sp. nov., male: A—opisthosoma in dorsal view; B—same, in ventral view.
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Allen Brain Atlas
Allen Brain Atlas is an Allen Institute collection of brain map atlases, datasets, APIs, and analysis tools covering mouse, human, and non-human primate brain resources.
Annotated Behaviour and Observability Dataset (ABODe)
ABODe is a University of Edinburgh DataShare dataset for behavior classification in group-housed mice using home-cage video, identities, bounding boxes, ground-plate positions, and annotator labels.
DANDI Archive for NWB datasets
DANDI is a BRAIN Initiative archive for publishing and sharing neurophysiology data, including electrophysiology, optophysiology, and behavioral data packaged as NWB and related standards.
International Brain Laboratory public data
The International Brain Laboratory public data releases expose standardized mouse decision-making experiments, including Neuropixels recordings, widefield calcium imaging, behavior, and session metadata accessed through the ONE API.
OpenNeuro
OpenNeuro is a free, open platform for sharing neuroimaging datasets, with public search, dataset pages, and download paths for web, S3, DataLad, and the OpenNeuro CLI.