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Journal articles on the topic 'Swimming holes'

Author: Grafiati

Published: 4 June 2021

Last updated: 28 July 2025

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1

O’Brien, Shannon L., and Katherine A. Cronin. "The Impacts of a Commercial Bubble Curtain on Zoo-Housed African Penguin (Spheniscus demersus) Swimming Behavior." Journal of Zoological and Botanical Gardens 4, no. 3 (2023): 567–77. http://dx.doi.org/10.3390/jzbg4030040.

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Swimming is an important behavior for all penguin species. However, zoo-housed penguins typically do not swim as often as their wild counterparts, which may have consequences for their health and welfare. In an effort to increase the swimming time of the African penguin (Spheniscus demersus) population at Lincoln Park Zoo in Chicago, IL, USA (21 adults: 13 males, 8 females), we introduced a commercially available bubble curtain to the outdoor pool within the penguins’ habitat. The bubble curtain pushes pressurized air out through a hose fitted with small holes to create a stream of bubbles tha

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Elsner, Robert, Douglas Wartzok, Nancy B. Sonafrank, and Brendan P. Kelly. "Behavioral and physiological reactions of arctic seals during under-ice pilotage." Canadian Journal of Zoology 67, no. 10 (1989): 2506–13. http://dx.doi.org/10.1139/z89-354.

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One spotted seal (Phoca largha) and two ringed seals (Phoca hispida) were studied in experiments designed to determine which sensory modalities were employed in pilotage from one under-ice breathing hole to another. Breathing holes were drilled in the ice of a frozen freshwater pond and a lake near Fairbanks, Alaska. Holes were located 22–150 m apart. Tethered seals swimming without blindfolding located holes when they chanced to swim within visual detection distance. Blindfolded seals responded to acoustic signals. Tactile sensitivity of the vibrissae was used by blindfolded seals in the imme

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SATO, KEI, and ROBERT G. JENKINS. "MOBILE HOME FOR PHOLADOID BORING BIVALVES: FIRST EXAMPLE FROM A LATE CRETACEOUS SEA TURTLE IN HOKKAIDO JAPAN." PALAIOS 35, no. 5 (2020): 228–36. http://dx.doi.org/10.2110/palo.2019.077.

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ABSTRACT Trace fossils preserved in fossilized tissues provide a key resource for exploring the paleoecology of past ecosystems. Endobiont organisms are commonplace in modern ecosystems, but their trace fossils on vertebrates are rare as the organisms usually attack or attach to soft tissue. Here, we report the novel occurrence of flask-shaped boreholes representing the ichnotaxon Karethraichnus n. isp. in the carapace of the basal leatherback sea turtle Mesodermochelys sp. from the Upper Cretaceous of northern Japan. The distribution of the boreholes was determined by observing the carapace s

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DRAGUNOVA, S. M., E. V. KUZNETSOV, and A. E. HADJIDI. "IMPROVEMENT OF THE EFFICIENCY OF FISH PROTECTION STRUCTURES ON RECLAMATION WATER INTAKES OF THE LOWER KUBAN." Prirodoobustrojstvo, no. 4 (2020): 55–61. http://dx.doi.org/10.26897/1997-6011-2020-4-55-61.

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We used the data of observations presented in the reports of the FSBI «Head office «Kubanmeliovodhoz» and the results of laboratory tests on the physical model in the scale 1:20 of the new IFPF with the boom structure. The effectiveness of the model was evaluated using simulators for 3 groups of fish fry. The research data were processed using well-known methods of the mathematical analysis. The research methodology is justified which allows taking into account the concentration of young fish in 1 m3 when performing laboratory experiments.The investigations showed that the improvement of the e

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Thar, Roland, and Michael Kühl. "Conspicuous Veils Formed by Vibrioid Bacteria on Sulfidic Marine Sediment." Applied and Environmental Microbiology 68, no. 12 (2002): 6310–20. http://dx.doi.org/10.1128/aem.68.12.6310-6320.2002.

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ABSTRACT We describe the morphology and behavior of a hitherto unknown bacterial species that forms conspicuous veils (typical dimensions, 30 by 30 mm) on sulfidic marine sediment. The new bacteria were enriched on complex sulfidic medium within a benthic gradient chamber in oxygen-sulfide countergradients, but the bacteria have so far not been isolated in pure culture, and a detailed characterization of their metabolism is still lacking. The bacteria are colorless, gram-negative, and vibrioid-shaped (1.3- to 2.5- by 4- to 10-μm) cells that multiply by binary division and contain several spher

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Wartzok, Douglas, Robert Elsner, Henry Stone, Brendan P. Kelly, and Randall W. Davis. "Under-ice movements and the sensory basis of hole finding by ringed and Weddell seals." Canadian Journal of Zoology 70, no. 9 (1992): 1712–22. http://dx.doi.org/10.1139/z92-238.

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Arctic ringed seals (Phoca hispida) and antarctic Weddell seals (Leptonychotes weddelli) were tracked using an attached acoustic tag during their under-ice movements at isolated experimental sites with varying numbers of novel breathing holes. Both natural and artificial visual landmarks were used by the seals during their dives. Seals deprived of vision through blindfolding greatly restricted their diving. Blindfolded seals responded to supplied acoustic cues and moved toward them. Prior to swimming toward an acoustic cue, the animals often swam at an angle to the direct line to the source of

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7

Hidayat, Saifullah. "Behavior Study of Periophthalmus variabilis and Boleophthalmus boddarti." Journal of Natural Sciences and Mathematics Research 4, no. 1 (2018): 17–22. http://dx.doi.org/10.21580/jnsmr.2018.4.1.10959.

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This Gelodok fish (Mudskipper) which is called as amphibious fish have unique activity that can live in terrestrial and aquatic area. This study aims to study the daily activities of fish population 2 types of Periophthalmus variabilis and Boleophthalmus boddarti by using the scan sampling method and ad libitum. This research was conducted in September 2017 at the mouth of the river Tluwuk, Pati, Central Java. Observations were made for 150 minutes with a time interval of 5 minutes. The results showed that fish activity P. variabilis (v) was different from B. Boddarti (b). P. varibilis spends

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Dragunova, Svetlana, Evgeny Kuznetsov, Anna Khadzhidi, Alexander Koltsov, and Noureldin Sharaby. "Investigating the effectiveness of a fish-protection structure of the reclamation water intake." E3S Web of Conferences 210 (2020): 07008. http://dx.doi.org/10.1051/e3sconf/202021007008.

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The study was conducted at the reclamation water intake facility of Tikhovsky hydroelectric complex. We used data from long-term observations and results of laboratory studies on a 1:20 scale physical model of the Zapan fish protection device. The effectiveness of the model was evaluated using simulators of juvenile fish. Increasing the efficiency of the Zapan fish protection facility is achieved by additional placement in the bottom threshold, which directs the bottom flow along with the young fish to the springboard, where there is an airlift in the form of a bubble curtain that lifts the yo

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9

Hobson, R. P., and A. R. Martin. "Behaviour and dive times of Arnoux's beaked whales, Berardius arnuxii, at narrow leads in fast ice." Canadian Journal of Zoology 74, no. 2 (1996): 388–93. http://dx.doi.org/10.1139/z96-045.

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Groups of the little-known Arnoux's beaked whale, Berardius arnuxii, were observed at narrow cracks or leads in sea ice near the Antarctic peninsula during the austral summer of 1992–1993. The whales were grey, had a slightly asymmetric blowhole and blow, and were heavily scarred in adulthood. At least 30 animals were uniquely identified using their scars. Despite often cramped conditions at the breathing holes, the whales were always calm and nonaggressive, reacting to the circumstances with surfacing and submerging behaviour involving little horizontal movement. Seventy dive durations by 17

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Dopheide, Andrew, Gavin Lear, Rebecca Stott, and Gillian Lewis. "Preferential Feeding by the Ciliates Chilodonella and Tetrahymena spp. and Effects of These Protozoa on Bacterial Biofilm Structure and Composition." Applied and Environmental Microbiology 77, no. 13 (2011): 4564–72. http://dx.doi.org/10.1128/aem.02421-10.

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ABSTRACTProtozoa are important components of microbial food webs, but protozoan feeding preferences and their effects in the context of bacterial biofilms are not well understood. The feeding interactions of two contrasting ciliates, the free-swimming filter feederTetrahymenasp. and the surface-associated predatorChilodonellasp., were investigated using biofilm-forming bacteria genetically modified to express fluorescent proteins. According to microscopy, both ciliates readily consumed cells from bothPseudomonascostantiniiandSerratiaplymuthicabiofilms. When offered a choice between spatially s

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Brett, Carlton E., and Sally E. Walker. "Predators and Predation in Paleozoic Marine Environments." Paleontological Society Papers 8 (October 2002): 93–118. http://dx.doi.org/10.1017/s1089332600001078.

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The Paleozoic body fossil record of potential benthic predators includes nautiloid and ammonoid cephalopods, phyllocarids, decapods, and several lineages of gnathostomes. The latter group, in particular, radiated rapidly during the Devonian. In the pelagic realm, predator-prey interactions involving cephalopods and some nektonic arthropods probably appeared in the Ordovician. Again, evidence indicates intensification of pelagic predation, much of it by arthrodires and sharks on other fishes, during the Devonian radiation of gnathostomes.Trace fossils provide direct evidence of predatory attack

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Oseghale, Godwin Ehis, and Ime Johnson Ikpo. "Perception of Stakeholders on the Compliance of Sports Facilities to Relevant Standards in Selected Universities in South West Nigeria." European Scientific Journal, ESJ 14, no. 18 (2018): 264. http://dx.doi.org/10.19044/esj.2018.v14n18p264.

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This paper examines the level of compliance of sports facilities, in selected universities in South-Western Nigeria to relevant standards (National and International standards). Data were collected using a structured questionnaire which was administered on sports men and women (4 male, 2 female). Personnel responsible for maintenance of sports facilities in the universities were also sampled (two groundsmen from each University, the Director of Sports and two other members of the sport Council, Director of Works, four maintenance Supervisors, and two maintenance administrative staff, and eight

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13

Ou, W. S., S. T. Hu, Y. S. Chang, and Y. K. Zhao. "Case Study for Test Tool of Chloride in Swimming Pool with Method of Effective Evaluation of Multiprocess Performance Analysis." Advanced Materials Research 503-504 (April 2012): 314–17. http://dx.doi.org/10.4028/www.scientific.net/amr.503-504.314.

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Human exposure to chloride ions in swimming pools has been recognized as a potential health concern. Although environmental monitoring is a useful technique to investigate chloride ions concentrations in indoor swimming-pool air, in practice, the interpretations of measured data would inevitably run into difficulties due to the complex interactions among the numerous variables, including environmental conditions and occupant activities. Consequently, the examination of chloride ions within swimming pool becomes an important test item for water quality control procedure. To effectively check th

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Grundlingh, Marizanne. "Sea You There! An Auto-ethnographic Study of Open-water Swimming in Cape Town." African Studies Quarterly 22, no. 4 (2024): 66–83. https://doi.org/10.32473/asq.22.4.137724.

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Through an autoethnography of open-water swimming in the oceans of Cape Town, I investigate the symbolic value that the water holds for a niche group of swimmers. Open-water swimming has become a phenomenon worldwide, but it takes on a particular flavor in Cape Town. Through this embodied practice, I interrogate how a small group of swimmers build community in search of solitude, individual therapy, and meaning. While I reflect on my embodied experiences of being in the water, my presence in the water opens up unique opportunities to engage with others in search of the shared symbolic value pl

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15

Ishimoto, Kenta. "A spherical squirming swimmer in unsteady Stokes flow." Journal of Fluid Mechanics 723 (April 16, 2013): 163–89. http://dx.doi.org/10.1017/jfm.2013.131.

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AbstractThe motion of a spherical squirmer in unsteady Stokes flow is investigated for a deeper understanding of unsteady inertial effects on swimming micro-organisms and differences of swimming strokes between a wave pattern and a flapping motion. An asymptotic analysis with respect to the small amplitude and the small inertia is performed, and the average swimming velocity after a long period of time under an assumption of a time-periodic stroke is obtained. This analysis shows that the scallop theorem still holds in a long-time asymptotic sense for tangential deformation, but that the time

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Tadano, Takeshi, Osamu Nakagawasai, Fukie Niijima, Koichi Tan-No, and Kensuke Kisara. "The Effects of Traditional Tonics on Fatigue in Mice Differ from Those of the Antidepressant Imipramine: A Pharmacological and Behavioral Study." American Journal of Chinese Medicine 28, no. 01 (2000): 97–104. http://dx.doi.org/10.1142/s0192415x0000012x.

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The present studies were undertaken to investigate the differences between the antidepressant drug, imipramine, and liquid nutritive and tonic drugs (NTDs) that consist of Ginseng radix, Epimedii herba, Holen and an additional eight to twelve crude drugs. After preloading forced swimming, the NTD (applied orally, 0.1 ml/10 g) significantly increased the duration time of swimming and decreased the duration time of immobility, while the administration of imipramine (5, 10 and 20 mg/kg, i.p.) under the same conditions and after the same treatment did not produce these positive effects. After pret

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Giagiozis, Melina, Sabrina Imhof, Sibylle Achermann, Catherine R. Jutzeler, László Demkó, and Björn Zörner. "Quantification of Lower Limb Kinematics During Swimming in Individuals with Spinal Cord Injury." Sensors 25, no. 13 (2025): 3950. https://doi.org/10.3390/s25133950.

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Spinal cord injuries (SCI) often result in impaired motor functions. To quantify these impairments, swimming patterns were analyzed in individuals with SCI. Water provides a unique rehabilitation environment where buoyancy supports weight-bearing activities and can reveal deficits that might otherwise go unnoticed. Data were collected of 30 individuals with chronic, motor-incomplete SCI and 20 healthy controls during breaststroke swimming on a kickboard. Using eight wearable inertial sensors attached to the lower limbs, we captured detailed kinematic data. Spatiotemporal parameters were then c

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Alben, Silas, Kevin Spears, Stephen Garth, David Murphy, and Jeannette Yen. "Coordination of multiple appendages in drag-based swimming." Journal of The Royal Society Interface 7, no. 52 (2010): 1545–57. http://dx.doi.org/10.1098/rsif.2010.0171.

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Krill are aquatic crustaceans that engage in long distance migrations, either vertically in the water column or horizontally for 10 km (over 200 000 body lengths) per day. Hence efficient locomotory performance is crucial for their survival. We study the swimming kinematics of krill using a combination of experiment and analysis. We quantify the propulsor kinematics for tethered and freely swimming krill in experiments, and find kinematics that are very nearly metachronal. We then formulate a drag coefficient model which compares metachronal, synchronous and intermediate motions for a freely s

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Giraudet, Chloé, Claire Moiroud, Audrey Beaumont, et al. "Development of a Methodology for Low-Cost 3D Underwater Motion Capture: Application to the Biomechanics of Horse Swimming." Sensors 23, no. 21 (2023): 8832. http://dx.doi.org/10.3390/s23218832.

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Hydrotherapy has been utilized in horse rehabilitation programs for over four decades. However, a comprehensive description of the swimming cycle of horses is still lacking. One of the challenges in studying this motion is 3D underwater motion capture, which holds potential not only for understanding equine locomotion but also for enhancing human swimming performance. In this study, a marker-based system that combines underwater cameras and markers drawn on horses is developed. This system enables the reconstruction of the 3D motion of the front and hind limbs of six horses throughout an entir

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Williams, T. M., J. E. Haun, and W. A. Friedl. "The diving physiology of bottlenose dolphins (Tursiops truncatus). I. Balancing the demands of exercise for energy conservation at depth." Journal of Experimental Biology 202, no. 20 (1999): 2739–48. http://dx.doi.org/10.1242/jeb.202.20.2739.

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During diving, marine mammals must rely on the efficient utilization of a limited oxygen reserve sequestered in the lungs, blood and muscles. To determine the effects of exercise and apnea on the use of these reserves, we examined the physiological responses of adult bottlenose dolphins (Tursiops truncatus) trained to breath-hold on the water surface or to dive to submerged targets at depths between 60 and 210 m. Changes in blood lactate levels, in partial pressures of oxygen and carbon dioxide and in heart rate were assessed while the dolphins performed sedentary breath-holds. The effects of

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Shaffer, S. A., D. P. Costa, T. M. Williams, and S. H. Ridgway. "Diving and swimming performance of white whales, Delphinapterus leucas: an assessment of plasma lactate and blood gas levels and respiratory rates." Journal of Experimental Biology 200, no. 24 (1997): 3091–99. http://dx.doi.org/10.1242/jeb.200.24.3091.

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The white whale Delphinapterus leucas is an exceptional diver, yet we know little about the physiology that enables this species to make prolonged dives. We studied trained white whales with the specific goal of assessing their diving and swimming performance. Two adult whales performed dives to a test platform suspended at depths of 5-300 m. Behavior was monitored for 457 dives with durations of 2.2-13.3 min. Descent rates were generally less than 2 m s-1 and ascent rates averaged 2.2-3 m s-1. Post-dive plasma lactate concentration increased to as much as 3.4 mmol l-1 (4-5 times the resting l

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Xu, Dong, Yuanlin Zhang, Hongjie Fan, and Cai Meng. "High-Efficiency Closed-Loop Control of a Robotic Fish via Virtual Musculoskeletal Methodology." Applied Sciences 11, no. 18 (2021): 8602. http://dx.doi.org/10.3390/app11188602.

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Improving propulsion efficiency holds the promise of enabling the robotic fish to work for a long time with a limited battery in its small body. In this paper, for the swimming of a bionic robotic fish, we present a virtual musculoskeletal control method from the bionic model of the joint driven by agonist muscle and antagonist muscle. A closed-loop method composed of two loops is proposed as a rule of thumb for the speed control of the robotic fish. The outer loop adjusts the swimming speed using the speed deviation; the inner loop regulates the stiffness according to the virtual muscle spind

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Zhang, Shenwei, Xuguang Zhang, Xianming Tang, and Shouyu Zhang. "Exploring Sound Frequency Detection in the Golden Rabbitfish, Siganus guttatus: A Behavioral Study." Animals 14, no. 20 (2024): 2967. http://dx.doi.org/10.3390/ani14202967.

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This study investigates the auditory capabilities of Golden Rabbitfish (Siganus guttatus) and the potential efficacy of sound-based deterrent methods for behavior control. Behavioral experiments were conducted on Golden Rabbitfish to assess their responses to sound stimuli. Sinusoidal pulses in the range of 100~800 Hz, based on previous research on auditory evoked potentials (AEPs), were utilized. An analysis of behavioral trajectories, swimming speed, and acceleration changes revealed the fish’s reactions to varying frequency sound stimuli. The results indicate that Golden Rabbitfish exhibite

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Matthews, Samuel A., Carlos Coelho, Erick E. Rodriguez Salas, et al. "Real-time 3D tracking of swimming microbes using digital holographic microscopy and deep learning." PLOS ONE 19, no. 4 (2024): e0301182. http://dx.doi.org/10.1371/journal.pone.0301182.

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The three-dimensional swimming tracks of motile microorganisms can be used to identify their species, which holds promise for the rapid identification of bacterial pathogens. The tracks also provide detailed information on the cells’ responses to external stimuli such as chemical gradients and physical objects. Digital holographic microscopy (DHM) is a well-established, but computationally intensive method for obtaining three-dimensional cell tracks from video microscopy data. We demonstrate that a common neural network (NN) accelerates the analysis of holographic data by an order of magnitude

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Zhang, Zhenyu, and Rozaireen Bin Muszali. "Application of the BOPPPS Teaching Model in Physical Education: Enhancing Engagement, Skill Acquisition, and Inclusive Learning." International Journal of Education and Humanities 19, no. 2 (2025): 47–52. https://doi.org/10.54097/361h7s53.

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The BOPPPS (Bridge-in, Objective, Pre-assessment, Participatory Learning, Post-assessment, Summary) teaching model has emerged as a widely recognized framework for enhancing educational outcomes through its structured and student-centered approach. This paper investigates the application of the BOPPPS model in physical education (PE), a discipline characterized by hands-on practice, physical skill development, and diverse student needs. By synthesizing existing literature and analyzing case studies in swimming and badminton courses, the study highlights the model’s effectiveness in improving m

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Rudd, Jessica L., Tiago Bartolomeu, Haley R. Dolton, et al. "Basking shark sub-surface behaviour revealed by animal-towed cameras." PLOS ONE 16, no. 7 (2021): e0253388. http://dx.doi.org/10.1371/journal.pone.0253388.

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While biologging tags have answered a wealth of ecological questions, the drivers and consequences of movement and activity often remain difficult to ascertain, particularly marine vertebrates which are difficult to observe directly. Basking sharks, the second largest shark species in the world, aggregate in the summer in key foraging sites but despite advances in biologging technologies, little is known about their breeding ecology and sub-surface behaviour. Advances in camera technologies holds potential for filling in these knowledge gaps by providing environmental context and validating be

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Zhang, Yu, Qiu-Meng Xiang, Chang-Kao Mu, Chun-Lin Wang, and Cong-Cong Hou. "Functional Study of PTSMAD4 in the Spermatogenesis of the Swimming Crab Portunus trituberculatus." International Journal of Molecular Sciences 25, no. 23 (2024): 13126. https://doi.org/10.3390/ijms252313126.

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Portunus trituberculatus holds significant economic value. The spermatogenesis is regulated by numerous signaling pathways. Among them, the TGF-β signaling pathway plays an important role in the development of testes and spermatogenesis. Smad4 is a Co-Smad protein that forms a complex with R-Smad to regulate the expression of target genes. The sperm structure in crustaceans differs greatly from that in mammals, with mature sperm lacking tails. Our previous studies have reported the function of R-Smad in the spermatogenesis of P. trituberculatus. In this study, we cloned the full-length cDNA se

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Helluy, Simone, and John C. Holmes. "Serotonin, octopamine, and the clinging behavior induced by the parasite Polymorphus paradoxus (Acanthocephala) in Gammarus lacustris (Crustacea)." Canadian Journal of Zoology 68, no. 6 (1990): 1214–20. http://dx.doi.org/10.1139/z90-181.

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Gammarus lacustris infected with cystacanths of Polymorphus paradoxus display an abnormal behavior. They respond to disturbance by swimming to the surface and clinging to a solid object (W. M. Bethel and J. C. Holmes. 1973. J. Parasitol. 59: 945–956). Uninfected gammarids injected with serotonin (1–20 μg/50 mg) but not other neurotransmitters also responded to mechanical stimulation by clinging, but the response lasted for a shorter time than in infected gammarids. Octopamine suppressed the clinging response in infected gammarids for several hours. The results suggest that cystacanths of P. pa

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Ramalhosa, Patrício, Alfonso Nebra, Ignacio Gestoso, and João Canning-Clode. "First record of the non-indigenous isopods Paracerceis sculpta (Holmes, 1904) and Sphaeroma walkeri Stebbing, 1905 (Isopoda, Sphaeromatidae) for Madeira Island." Crustaceana 90, no. 14 (2017): 1747–64. http://dx.doi.org/10.1163/15685403-00003727.

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While exploring the presence of non-indigenous fouling species colonizing settlement plates deployed in local marinas in Madeira Island (north-eastern Atlantic Ocean), two non-indigenous species (NIS) of free-swimming crustaceans,Paracerceis sculpta(Holmes, 1904) andSphaeroma walkeriStebbing, 1905 (Isopoda: Sphaeromatidae), were detected.Paracerceis sculptais native to the Pacific Coast of North and Central America and has been introduced into many other regions worldwide.Sphaeroma walkeriis native to the northern Indian Ocean and nowadays is considered one of the most widely ship-transported

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Voloshin, Sergei Yurievich, and Ekaterina Anatolevna Belousova. "Features rehabilitation of infants with congenital hip dislocation on the stages of conservative treatment." Pediatric Traumatology, Orthopaedics and Reconstructive Surgery 3, no. 2 (2015): 66–70. http://dx.doi.org/10.17816/ptors3266-70.

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Congenital dislocation of the hip is one of the most common diseases in children leading to disability, which is difficult to diagnose in the first days of life. In the structure of congenital orthopedic diseases congenital dislocation of the hip holds one of the first places. This determines the importance and urgency of the problem, as the most complete restoration of anatomical structures and functions of the hip joint in children occurs in the early diagnosis and comprehensive, timely begun treatment. Rehabilitation of children in the first year of life should be early, systematic, compreh

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Agarwal, Priti, and Ronen Zaidel-Bar. "Diverse roles of non-muscle myosin II contractility in 3D cell migration." Essays in Biochemistry 63, no. 5 (2019): 497–508. http://dx.doi.org/10.1042/ebc20190026.

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Abstract All is flux, nothing stays still. Heraclitus of Ephesus’ characterization of the universe holds true for cells within animals and for proteins within cells. In this review, we examine the dynamics of actin and non-muscle myosin II within cells, and how their dynamics power the movement of cells within tissues. The 3D environment that migrating cells encounter along their path also changes over time, and cells can adopt various mechanisms of motility, depending on the topography, mechanics and chemical composition of their surroundings. We describe the differential spatio-temporal regu

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Arifin, Bustanol. "PENGEMBANGAN GERAK DASAR RENANG UNTUK ANAK SEKOLAH DASAR." Jurnal Pemikiran dan Pengembangan Sekolah Dasar (JP2SD) 1, no. 1 (2013): 1. http://dx.doi.org/10.22219/jp2sd.v1i1.1523.

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PENGEMBANGAN GERAK DASAR RENANGUNTUK ANAK SEKOLAH DASARBustanol Arifine-mail: bustanol_arifin@yahoo.co.idAbstract:Movement skills in the learning process of physical education in primary schoolsone of which is the basic swimming motion. The reason of the branch pool can be used toachieve the goal of physical education because the pool has many benefits. The benefits ofwhich can assist the growth and development of the body, to socialize and interact with others,increase self-confidence, and can be used as a recreational activity due to cold stimuli canrefresh the body and feelings. Model devel

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Ishimoto, Kenta, and Eamonn A. Gaffney. "Boundary element methods for particles and microswimmers in a linear viscoelastic fluid." Journal of Fluid Mechanics 831 (October 13, 2017): 228–51. http://dx.doi.org/10.1017/jfm.2017.636.

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The consideration of viscoelasticity within fluid dynamical boundary element methods has traditionally required meshing over the whole flow domain. In turn, a major advantage of the boundary element method is lost, namely the need to consider only surface boundary integrals. Here, using a generalised reciprocal relation and viscoelastic force singularities, a boundary element method is developed for linear viscoelastic flows. We proceed to explore finite-deformation microswimming in a linear Maxwell fluid. We firstly deduce a finite-amplitude generalisation of a previously reported result that

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Latifa, Jheni Sriayu, and Indang Dewata. "Efektivitas Kitosan Cangkang Kepiting (Scylla serrata) sebagai Koagulan untuk Mengurangi Mikroplastik Polistirena (PS) dalam Air Limbah." MASALIQ 5, no. 4 (2025): 1970–87. https://doi.org/10.58578/masaliq.v5i4.6765.

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Microplastic pollution in wastewater has become an urgent environmental issue due to its resistance to degradation and its potential to contaminate the food chain. This study aims to develop a natural coagulant based on chitosan extracted from the waste shells of Scylla serrata (blue swimming crab) as an eco-friendly solution for precipitating polystyrene (PS) microplastics in wastewater. Chitosan was obtained through demineralization, deproteinization, and deacetylation processes, and its effectiveness was tested in a solution containing 50 mg of pure PS microplastics in 250 ml of wastewater.

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Bouaguel, Leila, Nabil Charchar, and Moussa Houhamdi. "Phenology and diurnal behavior of common  shelduck Tadorna tadorna at Sebkhet Bazer (El-Eulma, Nouth-East of Hauts Plateaux, Algeria)." Acta Biologica Sibirica 7 (October 12, 2021): 293–306. http://dx.doi.org/10.3897/abs.7.e68903.

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This work aims to study phenology and daytime budget of common shelduck Tadorna tadorna (Anatidae) for two wintering seasons (2017/2018, 2018/2019) at Sebkhet Bazer (El-Eulma) North-East of Algeria from September to March. The obtained results show that common shelduck has the status of a wintering species. It was observed presently in the site during the study period. Common shelduck numbers begin to increase from the first decade of September to reach the maximums between late December and early January, where we had recorded the peaks of abundance 840 for the first season and 930 for the se

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Bouaguel, Leila, Nabil Charchar, and Moussa Houhamdi. "Phenology and diurnal behavior of common shelduck Tadorna tadorna at Sebkhet Bazer (El-Eulma, Nouth-East of Hauts Plateaux, Algeria)." Acta Biologica Sibirica 7 (October 12, 2021): 293–306. https://doi.org/10.3897/abs.7.e68903.

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This work aims to study phenology and daytime budget of common shelduck <em>Tadorna tadorna</em> (Anatidae) for two wintering seasons (2017/2018, 2018/2019) at Sebkhet Bazer (El-Eulma) North-East of Algeria from September to March. The obtained results show that common shelduck has the status of a wintering species. It was observed presently in the site during the study period. Common shelduck numbers begin to increase from the first decade of September to reach the maximums between late December and early January, where we had recorded the peaks of abundance 840 for the first season and 930 f

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Sun, Le, Lu Ping, Ruzhen Gao, Bo Zhang, and Xiaowei Chen. "lmo4a Contributes to Zebrafish Inner Ear and Vestibular Development via Regulation of the Bmp Pathway." Genes 14, no. 7 (2023): 1371. http://dx.doi.org/10.3390/genes14071371.

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Background: In vertebrates, the development of the inner ear is a delicate process, whereas its relating molecular pathways are still poorly understood. LMO4, an LIM domain-only transcriptional regulator, is drawing an increasing amount of interest for its multiple roles regarding human embryonic development and the modulation of ototoxic side effects of cisplatin including cochlear apoptosis and hearing loss. The aim of the present study is to further explore the role of lmo4a in zebrafish inner ear development and thus explore its functional role. Methods: The Spatial Transcript Omics DataBa

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Povarnina, P. Yu, N. M. Sazonova, D. M. Nikiforov, T. A. Gudasheva, and V. L. Dorofeev. "A study on the mnemotropic and antidepressant-like effects of the low-molecular-weight mimetic of nerve growth factor, dipeptide GK-2, in experimental ischemic stroke." Pharmacokinetics and Pharmacodynamics, no. 1 (June 25, 2024): 14–22. http://dx.doi.org/10.37489/2587-7836-2024-1-14-22.

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Relevance. The nerve growth factor (NGF), possessing neuroprotective and neuroregenerative properties, holds promise for the development of medications for the treatment of post-stroke conditions. At the Federal Research Center for Innovator and Emerging Biomedical and Pharmaceutical Technologies, a dimeric dipeptide mimic of NGF with the laboratory code GK-2 was designed and synthesized. Under conditions of experimental cerebral ischemia, it significantly reduced the volume of brain infarction and stimulated neuro- and synaptogenesis.Objective. The aim of this study was to investigate the eff

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Noren, Shawn R. "Postnatal development of diving physiology: implications of anthropogenic disturbance for immature marine mammals." Journal of Experimental Biology 223, no. 17 (2020): jeb227736. http://dx.doi.org/10.1242/jeb.227736.

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ABSTRACTMarine mammals endure extended breath-holds while performing active behaviors, which has fascinated scientists for over a century. It is now known that these animals have large onboard oxygen stores and utilize oxygen-conserving mechanisms to prolong aerobically supported dives to great depths, while typically avoiding (or tolerating) hypoxia, hypercarbia, acidosis and decompression sickness (DCS). Over the last few decades, research has revealed that diving physiology is underdeveloped at birth. Here, I review the postnatal development of the body's oxygen stores, cardiorespiratory sy

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Hallmann, A., and D. L. Kirk. "The developmentally regulated ECM glycoprotein ISG plays an essential role in organizing the ECM and orienting the cells of Volvox." Journal of Cell Science 113, no. 24 (2000): 4605–17. http://dx.doi.org/10.1242/jcs.113.24.4605.

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Volvox is one of the simplest multicellular organisms with only two cell types, yet it has a surprisingly complex extracellular matrix (ECM) containing many region-specific morphological components, making Volvox suitable as a model system for ECM investigations. ECM deposition begins shortly after inversion, which is the process by which the embryo turns itself right-side-out at the end of embryogenesis. It was previously shown that the gene encoding an ECM glycoprotein called ISG is transcribed very transiently during inversion. Here we show that the developmentally controlled ISG accumulate

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Anstensrud, Morten. "Moulting and mating in Lepeophtheirus pectoralis (Copepoda: Caligidae)." Journal of the Marine Biological Association of the United Kingdom 70, no. 2 (1990): 269–81. http://dx.doi.org/10.1017/s0025315400035396.

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Prior to moulting, the preadult Lepeophtheirus pectoralis produces a temporary frontal filament which attaches the animal to the surface of the host during ecdysis. This filament is extruded from a frontal organ previously thought to have a chemoreceptory function. During ecdysis the exuvium splits at the anterior margin and is shed posteriorly by contractions of the body. After hardening of the exoskeleton the copepod detaches itself from the frontal filament and is free-living on the host during intermoult. Males in precopula position hold on to the dorsal side of the female, with the second

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Rivas-García, Lorenzo, Lara Crespo-Antolín, Tamara Y. Forbes-Hernández, et al. "Bioactive Properties of Tagetes erecta Edible Flowers: Polyphenol and Antioxidant Characterization and Therapeutic Activity against Ovarian Tumoral Cells and Caenorhabditis elegans Tauopathy." International Journal of Molecular Sciences 25, no. 1 (2023): 280. http://dx.doi.org/10.3390/ijms25010280.

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Tagetes erecta is an edible flower deeply rooted in traditional Mexican culture. It holds a central role in the most popular and iconic Mexican celebration, “the Day of the Dead”. Furthermore, it is currently receiving interest as a potential therapeutic agent, motivated mainly by its polyphenol content. The present study aims to evaluate the biological activity of an extract synthesized from the petals of the edible flower T. erecta. This extract showed significant antioxidant scores measured by the most common in vitro methodologies (FRAP, ABTS, and DPPH), with values of 1475.3 μM trolox/g e

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Zeng, Xiaoke, Cheng Zhang, Jianing Shi, et al. "Establishment and Evaluation of Fatigue Mice Model in the Convalescence Phase of Influenza A." Viruses 17, no. 5 (2025): 593. https://doi.org/10.3390/v17050593.

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Certain strains of Influenza A virus (IAV), a primary cause of influenza, can lead to pneumonia. Patients recovering from influenza pneumonia may experience physical discomfort akin to post-acute sequelae of COVID-19 (PASC). Despite extensive clinical research on viral pneumonia during convalescence, animal model studies are scarce, highlighting the need for a reliable model for pharmaceutical research. In this study, BALB/c mice were divided into three groups: NC (control), MC (infected with IAV), and Model (treated with oseltamivir post-infection for five days). A fatigue model was then indu

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Pransky, Joanne. "The Pransky interview: Professor Moshe Shoham, Founder of Mazor Robotics and Microbot Medical." Industrial Robot: An International Journal 41, no. 5 (2014): 393–97. http://dx.doi.org/10.1108/ir-07-2014-0367.

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Purpose – The purpose of this article is to present a “Q&A interview” conducted by Joanne Pransky of the Industrial Robot Journal as a method to impart the combined technological, business and personal experience of a prominent, robotic industry engineer-turned entrepreneur regarding the evolution, commercialization and challenges of bringing a technological invention to market. Design/methodology/approach – The interviewee is Professor Moshe Shoham, Director of the Robotics Laboratory, Department of Mechanical Engineering, Technion, Israel Institute of Technology. Professor Shoham is also

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Jacobs, Trent. "In Abu Dhabi, the Oil and Gas Industry Gets a Glimpse of the Future." Journal of Petroleum Technology 76, no. 12 (2024): 18–24. https://doi.org/10.2118/1224-0018-jpt.

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Over the past 12 months, JPT has celebrated its 75-year anniversary through an anthology of articles highlighting the publication’s long legacy of sharing industry knowledge. Contributions from current and former editors, along with long-time collaborators, provided unique perspectives on the ideas and innovators that have shaped SPE’s flagship publication since its launch in 1949. We encourage you to check out the collection here. As this retrospective series draws to a close, we will sharpen our focus once again on what the future holds for the industry. But first, it’s worth quickly revisit

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Horiguchi, Yusuke, Haiyun WU, Masataka Murata, et al. "Innovative Approach to Fish Stress Analysis: AI-Enhanced Biosensing and Accelerometer Integration." ECS Meeting Abstracts MA2024-02, no. 67 (2024): 4733. https://doi.org/10.1149/ma2024-02674733mtgabs.

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Background and Objectives: In our collaborative efforts, we have pioneered the development of a wireless biosensor system that can monitor blood glucose levels in fish, serving as a indicator of stress response. However, while the response value of the biosensor detected the increase in the fish's blood glucose level, it was a challenge to pinpoint the exact factors causing it. To address this, we augmented our measurements with data from a triaxial acceleration sensor and posture estimation using deep learning. This integration of biosensors, physical sensors, and video analysis technology, a

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Tanna, Dilip D., and Ashok Shyam. "Dr DD Tanna – Story of a Legend." Trauma International 1, no. 1 (2015): 3–6. http://dx.doi.org/10.13107/ti.2015.v01i01.002.

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This interview was conducted at the famous Lotus Clinic at Mumbai. Interview of Dr DD Tanna (DDT) was personally conducted by our Editor Dr Ashok Shyam (AK). It was an interesting two hours talk in late evening and we are presenting here the salient features of the interview. AK: First let me thank you for this interview. Let’s begin by asking about your family and where you grew up? DDT: I grew up in Kalbadevi area in Bombay in a typical Gujrati locality. I had four brothers so we were five of us together with my father and mother. At that time education was not something very popular in our

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Mandira, Saha, and P.K.Bandyopadhyay. "First report of three species of Argulus (Crustacea: Branchiura) infesting on red-can Oranda gold fish (Carassius auratus auratus) in India." Biolife 3, no. 4 (2022): 813–19. https://doi.org/10.5281/zenodo.7306506.

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<strong>ABSTRACT</strong> Ornamental fishes are considered as one of the most important means of home entertainment, because of its diversity and beauty of picturesque colors. This research work has been conducted to show that the ornamental fish mainly Red Can Oranda Gold fish (<em>Carassius auratusauratus</em>) are mainly affected with parasites like <em>Argulus</em> sp. and also reveal the prevalent and unforeseen parasitic infection in commercially available ornamental fishes which may credit to their marketable value. During the period of March 2014 to April 2015, around 30 numbers of fis

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Rinehart, Rachel. "Good Swimming Holes." Critical Humanities 1, no. 2 (2023). http://dx.doi.org/10.33470/2836-3140.1025.

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Acuña, Vicenç, Mar Auró, Ventura Campillo, Mira Petrovic, Josep Pueyo, and Anna Freixa. "Natural swimming holes, at the crossroad between conservation and recreation." Freshwater Biology, November 5, 2023. http://dx.doi.org/10.1111/fwb.14196.

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Abstract Natural swimming holes (NSH) are commonly the only habitats with water throughout the year in semi‐arid climates, thus becoming refuges for freshwater biota. However, human crowds also gather in NSH during the warm season, threatening biodiversity. Our goal was to analyse the drivers of recreation (e.g., distance to roads, river flow) in NSH, assess the relationship between visitation and impacts on water quality (dissolved organic carbon, ammonium, caffeine, and the sunscreen agent 2‐ethylhexyl 4‐methoxycinnamate) and bacterial biodiversity (as indicator of biodiversity), and to deve

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