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Aizawa A, Banno T, Asakura K. Bifurcation and Transposition of the Wicking Front of Binary Solutions Infiltrating into Chromatography Paper Associated with Their Evaporation. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2023; 39:16731-16739. [PMID: 37963320 PMCID: PMC10688430 DOI: 10.1021/acs.langmuir.3c01767] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/27/2023] [Revised: 10/20/2023] [Accepted: 10/23/2023] [Indexed: 11/16/2023]
Abstract
Nonequilibrium fluid patterns, such as Marangoni contraction, coffee rings, and tears of wine, are generated in binary solutions spread on a substrate during their evaporation. In this study, we observed another type of nonequilibrium behavior exhibited by binary solutions as they infiltrate porous materials and undergo evaporation. A binary solution comprising hexane and ethanol was brought into contact with the chromatography paper to facilitate infiltration into the paper's pores. Because the experimental setup was in an open environment, infiltration and evaporation occurred simultaneously. The wicking front exhibited an initial rapid advancement, followed by subsequent receding and readvancing. Additionally, the bifurcation of the wicking front after the onset of its readvancement was confirmed by monitoring the temporal evolution of the spatial luminance distribution and temperature distribution on the surface of the chromatography paper. Chromatographic development of a hydrophilic dye was conducted in this experimental setup in an open environment. Additionally, it was confirmed that the receding and readvancing of the wicking front represented the transposition of the bifurcated wicking fronts.
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Affiliation(s)
- Amiko Aizawa
- Department of Applied Chemistry, Faculty
of Science and Technology, Keio University, 3-14-1, Hiyoshi, Kohoku, Yokohama, Kanagawa 223-8522, Japan
| | - Taisuke Banno
- Department of Applied Chemistry, Faculty
of Science and Technology, Keio University, 3-14-1, Hiyoshi, Kohoku, Yokohama, Kanagawa 223-8522, Japan
| | - Kouichi Asakura
- Department of Applied Chemistry, Faculty
of Science and Technology, Keio University, 3-14-1, Hiyoshi, Kohoku, Yokohama, Kanagawa 223-8522, Japan
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2
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Takaku Y, Shiraki K, Suzuki C, Takehara S, Nishii H, Sasaki T, Hariyama T. Route of pesticide spread on the body surface of Blattella germanica (Linnaeus): a NanoSuit-energy dispersive X-ray spectroscopy analysis. Sci Rep 2023; 13:14335. [PMID: 37653069 PMCID: PMC10471590 DOI: 10.1038/s41598-023-41474-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2023] [Accepted: 08/27/2023] [Indexed: 09/02/2023] Open
Abstract
Numerous studies have focussed on the mechanisms of entry of pesticides into insect body parts such as oral intake, penetration through the integument of the body wall, and inhalation through spiracles. However, little is known about how insecticides spread to the points of entry or the paths on the body surface that are used to reach the target sites. In this study, elemental signals of pesticide-mimicking test solutions were tracked and their routes of spreading in experimental insects (Blattella germanica L.) were investigated using NanoSuit (a method of surface modification) and energy dispersive X-ray spectroscopy, combined with high-resolution scanning electron microscopy. When the test solution initially adhered to the dorsal and/or ventral body surface, it tended to spread horizontally to reach lateral plates. Whereas, when the solution directly adhered to the anterior side of the lateral plates, it spread to posterior segments. In this case, however, spreading in the opposite direction (i.e., the solution directly adhered to the posterior side of the lateral plates) was interrupted at a boundary erected by different groups of fine structures; each protrusion was large, and the arrangement was rather dense in the posterior segments. Morphological features of these fine structures and chemical characteristics of the hydrophobic surface substances potentially regulate the strength of the capillary force, which determines pesticide spreading.
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Affiliation(s)
- Yasuharu Takaku
- Laboratory of Bio-Design, Department of Agricultural Innovation for Sustainable Society, Tokyo University of Agriculture, 1737 Funako, Atsugi, Kanagawa, 243-0034, Japan.
- NanoSuit Inc., 1-20-1 Handayama, Higashi-ku, Hamamatsu, 431-3192, Japan.
| | - Katsumi Shiraki
- Research and Development Division, Fumakilla Limited, Umehara 1-11-13, Hatsukaichi, Hiroshima, 739-0494, Japan
| | - Chiaki Suzuki
- Preeminent Medical Photonics Education & Research Center, Institute for NanoSuit Research, Hamamatsu University School of Medicine, 1-20-1 Handayama, Higashi-ku, Hamamatsu, Shizuoka, 431-3192, Japan
| | - Sayuri Takehara
- Preeminent Medical Photonics Education & Research Center, Institute for NanoSuit Research, Hamamatsu University School of Medicine, 1-20-1 Handayama, Higashi-ku, Hamamatsu, Shizuoka, 431-3192, Japan
| | - Hiroyuki Nishii
- Research and Development Division, Fumakilla Limited, Umehara 1-11-13, Hatsukaichi, Hiroshima, 739-0494, Japan
| | - Tomonori Sasaki
- Research and Development Division, Fumakilla Limited, Umehara 1-11-13, Hatsukaichi, Hiroshima, 739-0494, Japan
| | - Takahiko Hariyama
- NanoSuit Inc., 1-20-1 Handayama, Higashi-ku, Hamamatsu, 431-3192, Japan.
- Preeminent Medical Photonics Education & Research Center, Institute for NanoSuit Research, Hamamatsu University School of Medicine, 1-20-1 Handayama, Higashi-ku, Hamamatsu, Shizuoka, 431-3192, Japan.
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3
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Marin IN, Tiunov AV. Terrestrial crustaceans (Arthropoda, Crustacea): taxonomic diversity, terrestrial adaptations, and ecological functions. Zookeys 2023; 1169:95-162. [PMID: 38328027 PMCID: PMC10848873 DOI: 10.3897/zookeys.1169.97812] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2022] [Accepted: 05/29/2023] [Indexed: 02/09/2024] Open
Abstract
Terrestrial crustaceans are represented by approximately 4,900 species from six main lineages. The diversity of terrestrial taxa ranges from a few genera in Cladocera and Ostracoda to about a third of the known species in Isopoda. Crustaceans are among the smallest as well as the largest terrestrial arthropods. Tiny microcrustaceans (Branchiopoda, Ostracoda, Copepoda) are always associated with water films, while adult stages of macrocrustaceans (Isopoda, Amphipoda, Decapoda) spend most of their lives in terrestrial habitats, being independent of liquid water. Various adaptations in morphology, physiology, reproduction, and behavior allow them to thrive in virtually all geographic areas, including extremely arid habitats. The most derived terrestrial crustaceans have acquired highly developed visual and olfactory systems. The density of soil copepods is sometimes comparable to that of mites and springtails, while the total biomass of decapods on tropical islands can exceed that of mammals in tropical rainforests. During migrations, land crabs create record-breaking aggregations and biomass flows for terrestrial invertebrates. The ecological role of terrestrial microcrustaceans remains poorly studied, while omnivorous macrocrustaceans are important litter transformers and soil bioturbators, occasionally occupying the position of the top predators. Notably, crustaceans are the only group among terrestrial saprotrophic animals widely used by humans as food. Despite the great diversity and ecological impact, terrestrial crustaceans, except for woodlice, are often neglected by terrestrial ecologists. This review aims to narrow this gap discussing the diversity, abundance, adaptations to terrestrial lifestyle, trophic relationships and ecological functions, as well as the main methods used for sampling terrestrial crustaceans.
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Affiliation(s)
- Ivan N. Marin
- A.N. Severtsov Institute of Ecology and Evolution, Russian Academy of Sciences, Moscow 119071, RussiaA.N. Severtsov Institute of Ecology and Evolution, Russian Academy of SciencesMoscowRussia
| | - Alexei V. Tiunov
- A.N. Severtsov Institute of Ecology and Evolution, Russian Academy of Sciences, Moscow 119071, RussiaA.N. Severtsov Institute of Ecology and Evolution, Russian Academy of SciencesMoscowRussia
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Sahadevan AV, T A JP, Kappalli S. Biphasic moulting in isopods confers advantages for their adaptation to various habitats and lifestyle. Biologia (Bratisl) 2022. [DOI: 10.1007/s11756-022-01017-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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5
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Honda M, Mukai K, Nagato E, Uno S, Oshima Y. Correlation between Polycyclic Aromatic Hydrocarbons in Wharf Roach ( Ligia spp.) and Environmental Components of the Intertidal and Supralittoral Zone along the Japanese Coast. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2021; 18:E630. [PMID: 33451067 PMCID: PMC7828494 DOI: 10.3390/ijerph18020630] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/14/2020] [Revised: 12/29/2020] [Accepted: 01/05/2021] [Indexed: 11/26/2022]
Abstract
Polycyclic aromatic hydrocarbon (PAH) concentrations in wharf roach (Ligia spp.), as an environmental indicator, and in environmental components of the intertidal and supralittoral zones were determined, and the PAH exposure pathways in wharf roach were estimated. Wharf roaches, mussels, and environmental media (water, soil and sand, and drifting seaweed) were collected from 12 sites in Japan along coastal areas of the Sea of Japan. PAH concentrations in wharf roaches were higher than those in mussels (median total of 15 PAHs: 48.5 and 39.9 ng/g-dry weight (dw), respectively) except for samples from Ishikawa (wharf roach: 47.9 ng/g-dw; mussel: 132 ng/g-dw). The highest total PAH concentration in wharf roach was from Akita (96.0 ng/g-dw), followed by a sample from Niigata (85.2 ng/g-dw). Diagnostic ratio analysis showed that nearly all PAHs in soil and sand were of petrogenic origin. Based on a correlation analysis of PAH concentrations between wharf roach and the environmental components, wharf roach exposure to three- and four-ring PAHs was likely from food (drifting seaweed) and from soil and sand, whereas exposure to four- and five-ring PAHs was from several environmental components. These findings suggest that the wharf roach can be used to monitor PAH pollution in the supralittoral zone and in the intertidal zone.
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Affiliation(s)
- Masato Honda
- Botanical Garden, Institute of Nature and Environmental Technology, Kanazawa University, Kakuma, Kanazawa, Ishikawa 920-1192, Japan
| | - Koki Mukai
- Faculty of Agriculture, Kyushu University, 744 Motooka, Nishi-ku, Fukuoka 819-0395, Japan; (K.M.); (Y.O.)
- Department of Biological Sciences, Graduate School of Science and Technology, Kumamoto University, 2-39-1 Kurokami, Chuo-ku, Kumamoto 860-8555, Japan
| | - Edward Nagato
- Graduate School of Life and Environmental Sciences, Shimane University, 1060 Nishitsugawa-machi, Matsue, Shimane 690-8504, Japan;
| | - Seiichi Uno
- Education and Research Center for Marine Resources and Environment, Faculty of Fisheries, Kagoshima University, 4-50-20 Shimoarata, Kagoshima 890-0056, Japan;
| | - Yuji Oshima
- Faculty of Agriculture, Kyushu University, 744 Motooka, Nishi-ku, Fukuoka 819-0395, Japan; (K.M.); (Y.O.)
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6
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Kuwada R, Ishii D. Optimizing Liquid Transport Velocity of Bioinspired Open-type Micro-blade Arrays. J PHOTOPOLYM SCI TEC 2020. [DOI: 10.2494/photopolymer.33.177] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Rikima Kuwada
- Department of Life Science and Applied Chemistry, Graduate School of Engineering, Nagoya Institute of Technology
| | - Daisuke Ishii
- Department of Life Science and Applied Chemistry, Graduate School of Engineering, Nagoya Institute of Technology
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7
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Gurera D, Bhushan B. Passive water harvesting by desert plants and animals: lessons from nature. PHILOSOPHICAL TRANSACTIONS. SERIES A, MATHEMATICAL, PHYSICAL, AND ENGINEERING SCIENCES 2020; 378:20190444. [PMID: 32008451 DOI: 10.1098/rsta.2019.0444] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Accepted: 12/03/2019] [Indexed: 06/10/2023]
Abstract
Fresh water sustains human life and is vital for human health. For some of the poorest countries, 1 in 10 people do not have access to safe and easily accessible water sources. Water consumption by man continues to grow with an increasing population. The current supply of fresh water needs to be supplemented to meet future needs. Living nature provides many lessons for water harvesting. It has evolved species which can survive in the most arid regions of the world by passively collecting water from fog and condensation of water vapour in the night. Before the collected water evaporates, species have mechanisms to transport water for storage or consumption. These species possess unique chemistry and structures on or within the body for collection and transport of water. Among the high diversity of species surviving in deserts, only a handful of species have been studied. Based on lessons from nature, bioinspired water harvesters can be designed. In this paper, an overview of various desert plants and animals is given and known water harvesting mechanisms of some are presented. This article is part of the theme issue 'Bioinspired materials and surfaces for green science and technology (part 3)'.
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Affiliation(s)
- Dev Gurera
- Nanoprobe Laboratory for Bio- and Nanotechnology and Biomimetics (NLBB), The Ohio State University, 201 West 19th Avenue, Columbus, OH 43210-1142, USA
| | - Bharat Bhushan
- Nanoprobe Laboratory for Bio- and Nanotechnology and Biomimetics (NLBB), The Ohio State University, 201 West 19th Avenue, Columbus, OH 43210-1142, USA
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8
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Xu D, Ba Y, Sun J, Fu X. A Numerical Study of Micro-Droplet Spreading Behaviors on Wettability-Confined Tracks Using a Three-Dimensional Phase-Field Lattice Boltzmann Model. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2020; 36:340-353. [PMID: 31851519 DOI: 10.1021/acs.langmuir.9b02731] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Wettability-confined tracks have been extensively used in open-surface microfluidic devices for their high capacity of transporting droplet pumplessly. Inspired by the experimental work of Sen et al. [ Langmuir 2018 , 34 , 1899 - 1907 ], in the present study, a three-dimensional phase-field lattice Boltzmann model is developed and used to investigate the spreading behaviors of microdroplet on a series of wettability-confined tracks. The experimental findings are successfully reproduced through our simulation, where three distinct stages of droplet spreading on the horizontal wettability-confined diverging track are fairly exhibited, that is, the initial stage with droplet front spreading quickly, the intermediate stage with both droplet front and bulge moving forward at a constant speed, and the final stage with droplet front decelerating gradually. Moreover, a parametric study of track divergence angle is further performed, and the influential mechanism of track divergence angle on droplet spreading is further revealed. It is demonstrated that track divergence is responsible for the Laplace pressure gradient and capillary force inside the droplet, which drives the droplet bulge to move forward on the diverging track. With an increase in divergence angle, the capillary force increases linearly, which increases the droplet spreading speed at the initial and intermediate stages, while the peak capillary force comes earlier, and consequently the final decelerating stage comes earlier. On the basis of the parametric study and droplet volume conservation rule, a power law relation between track divergence angle and droplet spreading is proposed, which helps to identify the start of final decelerating stage. Finally, the droplet spreading over various inclined tracks is explored, which can be achieved only when the capillary force at the beginning is larger than the droplet gravity component along the inclined track surface.
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Affiliation(s)
- Da Xu
- School of Energy and Power Engineering , Xi'an Jiaotong University , 28 West Xianning Road , Xi'an 710049 , China
| | - Yan Ba
- School of Astronautics , Northwestern Polytechnical University , 127 West Youyi Road , Xi'an 710072 , China
| | - Jinju Sun
- School of Energy and Power Engineering , Xi'an Jiaotong University , 28 West Xianning Road , Xi'an 710049 , China
| | - Xiaojin Fu
- School of Energy and Power Engineering , Xi'an Jiaotong University , 28 West Xianning Road , Xi'an 710049 , China
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9
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Sonka D, Halasy K, Buczkó K, Hornung E. Morphological traits - desiccation resistance - habitat characteristics: a possible key for distribution in woodlice (Isopoda, Oniscidea). Zookeys 2018:481-499. [PMID: 30564050 PMCID: PMC6288246 DOI: 10.3897/zookeys.801.23088] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2017] [Accepted: 08/27/2018] [Indexed: 11/25/2022] Open
Abstract
Terrestrial isopods, as successful colonizers of land habitats, show a great variety in species distribution patterns on a global, continental, or regional scale. On a local, within-habitat level these patterns reflect the species’ tolerance limits and the presence of suitable hiding places (shelter sites, refugia). Humidity preference reflects a species’ capability for water retention which, in turn, depends on the integumental barrier. Desiccation resistance is a key feature in isopod survival under different environmental conditions. The present study shows a correlation between cuticle thickness and desiccation resistance under three relative humidity (RH) ranges (about 30, 75 and 100% RH) in nine species, relating these to the species’ differences in meso- and microhabitat choices. Habitat preferences are also associated with differences in cuticle surface morphology. The results support our hypothesis that species distribution and desiccation resistance are associated with particular cuticular morphological traits. Phylogenetic relations seem to be less important in desiccation resistance than cuticle thickness and external morphology.
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Affiliation(s)
- Diána Sonka
- Department of Ecology, University of Veterinary Medicine Budapest, H-1077 Budapest, Rottenbiller St. 50., Hungary
| | - Katalin Halasy
- Department of Anatomy and Histology, University of Veterinary Medicine Budapest, H-1078 Budapest, István St. 2., Hungary
| | - Krisztina Buczkó
- Department of Botany, Hungarian Natural History Museum, H-1087 Budapest, Könyves Kálmán Blvd. 40., Hungary.,HAS Centre for Ecological Research, Danube Research Institute, H-1113 Budapest, Karolina St. 29., Hungary
| | - Elisabeth Hornung
- Department of Ecology, University of Veterinary Medicine Budapest, H-1077 Budapest, Rottenbiller St. 50., Hungary
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10
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Kim T, Kim W. Viscous dewetting of metastable liquid films on substrates with microgrooves. J Colloid Interface Sci 2018. [DOI: 10.1016/j.jcis.2018.02.073] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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11
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Comanns P. Passive water collection with the integument: mechanisms and their biomimetic potential. ACTA ACUST UNITED AC 2018; 221:221/10/jeb153130. [PMID: 29789349 DOI: 10.1242/jeb.153130] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
Several mechanisms of water acquisition have evolved in animals living in arid habitats to cope with limited water supply. They enable access to water sources such as rain, dew, thermally facilitated condensation on the skin, fog, or moisture from a damp substrate. This Review describes how a significant number of animals - in excess of 39 species from 24 genera - have acquired the ability to passively collect water with their integument. This ability results from chemical and structural properties of the integument, which, in each species, facilitate one or more of six basic mechanisms: increased surface wettability, increased spreading area, transport of water over relatively large distances, accumulation and storage of collected water, condensation, and utilization of gravity. Details are described for each basic mechanism. The potential for bio-inspired improvement of technical applications has been demonstrated in many cases, in particular for several wetting phenomena, fog collection and passive, directional transport of liquids. Also considered here are potential applications in the fields of water supply, lubrication, heat exchangers, microfluidics and hygiene products. These present opportunities for innovations, not only in product functionality, but also for fabrication processes, where resources and environmental impact can be reduced.
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Affiliation(s)
- Philipp Comanns
- RWTH Aachen University, Institute of Biology II (Zoology), Worringerweg 3, 52074 Aachen, Germany
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12
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Muto K, Ishii D. Effects of anisotropic liquid spreading on liquid transport in arrow-like micropillar arrays. Colloids Surf A Physicochem Eng Asp 2018. [DOI: 10.1016/j.colsurfa.2018.02.023] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
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13
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Hirai Y, Mayama H, Matsuo Y, Shimomura M. Uphill Water Transport on a Wettability-Patterned Surface: Experimental and Theoretical Results. ACS APPLIED MATERIALS & INTERFACES 2017; 9:15814-15821. [PMID: 28421741 DOI: 10.1021/acsami.7b00806] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
In nature, there exist many functional water-controlling surfaces, such as the water-repellent surface of lotus leaves, the superhydrophobic water-adhesive surface of rose petals, the water-harvesting surface of a beetle's back, and the water-transporting surface of the legs of Ligia exotica. These natural surfaces suggest that surface chemistry and hierarchical structures are essential for controlling the water behavior. We have reported the preparation of superhydrophobic and antireflection silicon nanospike-array structures using self-organized honeycomb-patterned films as three-dimensional dry-etching masks. Moreover, the surface wettability of the silicon nanospike-array structures can be easily transformed from superhydrophobic to superhydrophilic by changes in the surface chemistry. In this report, we show the preparation of water-controlling surfaces, such as water-harvesting and water-transporting surfaces, by the wettability patterning of silicon nanostructured surfaces. We prepared honeycomb-patterned films for dry-etching masks made from polystyrene and an amphiphilic polymer by casting a chloroform solution. After the fixation of the top layer of the honeycomb-patterned films on a single-crystal silicon substrate, reactive ion etching was performed. The as-prepared silicon nanospike-array structure showed superhydrophobicity, and the water contact angles were over 170°. After UV-O3 treatment with photomasks, only the UV-irradiated surfaces showed superhydrophilicity, suggesting that we can obtain superhydrophobic- and superhydrophilic-patterned surfaces for which the patterns are the same as those of the photomasks. On the basis of these wettability-patterned surfaces, we demonstrated water harvesting by superhydrophilic dot-patterned surfaces and water transportation against gravity by superhydrophilic triangular-patterned surfaces. In particular, we investigated uphill water transport through the motion of droplets on tilting slopes based on the equation of motion. These results suggested that we can obtain superior microfluidic devices suitable for various applications through the use of optional wettability patterns.
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Affiliation(s)
- Yuji Hirai
- Department of Applied Chemistry and Bioscience, Chitose Institute of Science and Technology (CIST) , Bibi 758-65, Chitose 066-8655, Japan
| | - Hiroyuki Mayama
- Asahikawa Medical University , E2-1-1-1, Midorigaoka, Asahikawa 078-8510, Japan
| | - Yasutaka Matsuo
- Nanotechnology Research Center, Research Institute for Electronic Science (RIES), Hokkaido University , N21W10, Kita-ku, Sapporo 011-0021, Japan
| | - Masatsugu Shimomura
- Department of Applied Chemistry and Bioscience, Chitose Institute of Science and Technology (CIST) , Bibi 758-65, Chitose 066-8655, Japan
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14
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Affiliation(s)
- Shuto Ito
- Graduate school of Engineering; Nagoya Institute of Technology Gokiso-cho; Showa-ku Nagoya 466-8555 Japan
| | - Daisuke Ishii
- Graduate school of Engineering; Nagoya Institute of Technology Gokiso-cho; Showa-ku Nagoya 466-8555 Japan
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15
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Pollution of radiocesium and radiosilver in wharf roach (Ligia sp.) by the Fukushima Dai-ichi Nuclear Power Plant accident. J Radioanal Nucl Chem 2016. [DOI: 10.1007/s10967-016-4879-1] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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16
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Tani M, Ishii D, Ito S, Hariyama T, Shimomura M, Okumura K. Capillary rise on legs of a small animal and on artificially textured surfaces mimicking them. PLoS One 2014; 9:e96813. [PMID: 24849071 PMCID: PMC4029560 DOI: 10.1371/journal.pone.0096813] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2014] [Accepted: 04/11/2014] [Indexed: 11/19/2022] Open
Abstract
The wharf roach Ligia exotica is a small animal that lives by the sea and absorbs water from the sea through its legs by virtue of a remarkable array of small blades of micron scale. We find that the imbibition dynamics on the legs is rather complex on a microscopic scale, but on a macroscopic scale the imbibition length seems to simply scale linearly with elapsed time. This unusual dynamics of imbibition, which usually slows down with time, is advantageous for long-distance water transport and results from repetition of unit dynamics. Inspired by the remarkable features, we study artificially textured surfaces mimicking the structure on the legs of the animal. Unlike the case of the wharf roach, the linear dynamics were not reproduced on the artificial surfaces, which may result from more subtle features on the real legs that are not faithfully reflected on the artificial surfaces. Instead, the nonlinear dynamics revealed that hybrid structures on the artificial surfaces speed up the water transport compared with non-hybrid ones. In addition, the dynamics on the artificial surfaces turn out to be well described by a composite theory developed here, with the theory giving useful guiding principles for designing hybrid textured surfaces for rapid imbibition and elucidating physical advantages of the microscopic design on the legs.
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Affiliation(s)
- Marie Tani
- Department of Physics, Faculty of Science, Ochanomizu University, Otsuka, Bunkyo-ku, Tokyo, Japan
| | - Daisuke Ishii
- Center for Fostering Young and Innovative Researchers, Faculty of Engineering, Nagoya Institute of Technology, Gokiso-cho, Showa-ku, Nagoya, Japan
- CREST, Japan Science and Technology Agency, Hon-cho, Kawaguchi, Japan
| | - Shuto Ito
- Department of Life and Materials Engineering, Faculty of Engineering, Nagoya Institute of Technology, Gokiso-cho, Showa-ku, Nagoya, Japan
| | - Takahiko Hariyama
- Department of Biology, Hamamatsu University School of Medicine, Handayama, Higashi-ku, Hamamatsu, Japan
- CREST, Japan Science and Technology Agency, Hon-cho, Kawaguchi, Japan
| | - Masatsugu Shimomura
- WPI-Advanced Institute for Materials Research (WPI-AIMR), Tohoku University, Katahira, Aoba-ku, Sendai, Japan
- CREST, Japan Science and Technology Agency, Hon-cho, Kawaguchi, Japan
| | - Ko Okumura
- Department of Physics, Faculty of Science, Ochanomizu University, Otsuka, Bunkyo-ku, Tokyo, Japan
- CREST, Japan Science and Technology Agency, Hon-cho, Kawaguchi, Japan
- * E-mail:
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17
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Water transport mechanism through open capillaries analyzed by direct surface modifications on biological surfaces. Sci Rep 2013; 3:3024. [PMID: 24149467 PMCID: PMC3805968 DOI: 10.1038/srep03024] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2013] [Accepted: 10/04/2013] [Indexed: 11/19/2022] Open
Abstract
Some small animals only use water transport mechanisms passively driven by surface energies. However, little is known about passive water transport mechanisms because it is difficult to measure the wettability of microstructures in small areas and determine the chemistry of biological surfaces. Herein, we developed to directly analyse the structural effects of wettability of chemically modified biological surfaces by using a nanoliter volume water droplet and a hi-speed video system. The wharf roach Ligiaexotica transports water only by using open capillaries in its legs containing hair- and paddle-like microstructures. The structural effects of legs chemically modified with a self-assembled monolayer were analysed, so that the wharf roach has a smart water transport system passively driven by differences of wettability between the microstructures. We anticipate that this passive water transport mechanism may inspire novel biomimetic fluid manipulations with or without a gravitational field.
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Undap SL, Matsunaga S, Honda M, Sekiguchi T, Suzuki N, Khalil F, Qiu X, Shimasaki Y, Ando H, Sato-Okoshi W, Sunobe T, Takeda S, Munehara H, Oshima Y. Accumulation of organotins in wharf roach (Ligia exotica Roux) and its ability to serve as a biomonitoring species for coastal pollution. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2013; 96:75-79. [PMID: 23886801 DOI: 10.1016/j.ecoenv.2013.06.019] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/26/2013] [Revised: 06/18/2013] [Accepted: 06/21/2013] [Indexed: 06/02/2023]
Abstract
In this study, we measured the accumulation of tributyltin (TBT) in wharf roach (Ligia exotica Roux) and examined the species' ability to be used for TBT biomonitoring in coastal environments. In an exposure test, wharf roach were exposed to TBT via diet for 2d. TBT was accumulated in wharf roach, and its metabolite dibutyltin was detected. The concentrations of these compounds gradually decreased during the depuration period, but they were still detected 12d after exposure ceased (TBT 290±140ng/g; dibutyltin 1280±430ng/g). The biological half-life of TBT in wharf roach was estimated to be about 4d. In a field study conducted in 2011-2012, wharf roach were collected from 15 coastal sites in Japan and 3 sites in Manado, Indonesia. TBT was detected in both Japanese and Indonesian samples. The highest concentration of TBT was found in wharf roach collected at Bitung ferry port, Manado (57.9±16.5ng/g), which is close to a shipyard, and the highest concentration at a Japanese site was 12.3±6.2ng/g. Thus, we were able to detect organotins in the coastal environments by testing wharf roach, suggesting that L. exotica might serve as a good bioindicator for monitoring organotin pollution.
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Affiliation(s)
- Suzanne Lydia Undap
- Laboratory of Marine Environmental Science, Faculty of Agriculture, Kyushu University, Hakozaki 6-10-1, Higashi-ku, Fukuoka 812-8581, Japan
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Wright JC, O'Donnell MJ. In vivo ion fluxes across the eggs of Armadillidium vulgare (Oniscidea: Isopoda): the role of the dorsal organ. Physiol Biochem Zool 2010; 83:587-96. [PMID: 20465420 DOI: 10.1086/651583] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
The thin-walled, lecithotrophic eggs of land isopods (suborder Oniscidea) are brooded in a fluid-filled maternal marsupium until a few days following the second embryonic molt. Eggs of Armadillidium vulgare possess a well-developed dorsal organ underlying a broad silver-staining saddle on the vitelline membrane. Based on its chloride permeability and known transport functions in planktotrophic crustaceans, we hypothesized that the dorsal organ functions in passive or active ion movements. To study this, we employed the automated scanning electrode technique with self-referencing ion-selective microelectrodes to measure ion fluxes across the dorsal organ and adjacent egg poles. Stage 1 (chorionated) eggs revealed only small ion fluxes, indicating low permeability. Early stage 2 eggs--between the first embryonic molt and blastokinesis--showed evidence for active uptake of Ca(2+) and Cl(-) and possibly Na(+) against low bathing concentrations, and uptake fluxes were predominantly localized over the dorsal organ. Late stage 2 eggs revealed no capacity for ion uptake, consistent with the atrophy of the dorsal organ at blastokinesis, but high ion permeability. In all stages, the silver-staining saddle showed a sustained outward proton flux indicating that it is the primary site for metabolic acid/CO(2) excretion. The emerging picture is that the embryo dorsal organ in A. vulgare serves important functions in ion regulation, calcium provisioning, and acid excretion.
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