Dew condensation on desert beetle skin
Some tenebrionind beetles inhabiting the Namib desert are known for using their body to collect water droplets from wind-blown fogs. We aim to determine whether dew water collection is also possible for desert insects. For this purpose, we investigated the infra-red emissivity, and the wetting and s...
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| Veröffentlicht in: | The European physical journal. E, Soft matter and biological physics Soft matter and biological physics, 2014-11, Vol.37 (11), p.109-109, Article 109 |
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| creator | Guadarrama-Cetina, J. Mongruel, A. Medici, M. -G. Baquero, E. Parker, A. R. Milimouk-Melnytchuk, I. González-Viñas, W. Beysens, D. |
| description | Some tenebrionind beetles inhabiting the Namib desert are known for using their body to collect water droplets from wind-blown fogs. We aim to determine whether dew water collection is also possible for desert insects. For this purpose, we investigated the infra-red emissivity, and the wetting and structural properties, of the surface of the elytra of a preserved specimen of
Physasterna cribripes
(Tenebrionidæ) beetle, where the macro-structure appears as a series of “bumps”, with “valleys” between them. Dew formation experiments were carried out in a condensation chamber. The surface properties (infra-red emissivity, wetting properties) were dominated by the wax at the elytra surface and, to a lower extent, its micro-structure. We performed scanning electron microscope on histological sections and determined the infra-red emissivity using a scanning pyrometer. The emissivity measured (0.95±0.07 between 8–14μm) was close to the black body value. Dew formation occurred on the insect’s elytra, which can be explained by these surface properties. From the surface coverage of the condensed drops it was found that dew forms primarily in the valleys between the bumps. The difference in droplet nucleation rate between bumps and valleys can be attributed to the hexagonal microstructure on the surface of the valleys, whereas the surface of the bumps is smooth. The drops can slide when they reach a critical size, and be collected at the insect's mouth.
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| doi_str_mv | 10.1140/epje/i2014-14109-y |
| format | Article |
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Physasterna cribripes
(Tenebrionidæ) beetle, where the macro-structure appears as a series of “bumps”, with “valleys” between them. Dew formation experiments were carried out in a condensation chamber. The surface properties (infra-red emissivity, wetting properties) were dominated by the wax at the elytra surface and, to a lower extent, its micro-structure. We performed scanning electron microscope on histological sections and determined the infra-red emissivity using a scanning pyrometer. The emissivity measured (0.95±0.07 between 8–14μm) was close to the black body value. Dew formation occurred on the insect’s elytra, which can be explained by these surface properties. From the surface coverage of the condensed drops it was found that dew forms primarily in the valleys between the bumps. The difference in droplet nucleation rate between bumps and valleys can be attributed to the hexagonal microstructure on the surface of the valleys, whereas the surface of the bumps is smooth. The drops can slide when they reach a critical size, and be collected at the insect's mouth.
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Physasterna cribripes
(Tenebrionidæ) beetle, where the macro-structure appears as a series of “bumps”, with “valleys” between them. Dew formation experiments were carried out in a condensation chamber. The surface properties (infra-red emissivity, wetting properties) were dominated by the wax at the elytra surface and, to a lower extent, its micro-structure. We performed scanning electron microscope on histological sections and determined the infra-red emissivity using a scanning pyrometer. The emissivity measured (0.95±0.07 between 8–14μm) was close to the black body value. Dew formation occurred on the insect’s elytra, which can be explained by these surface properties. From the surface coverage of the condensed drops it was found that dew forms primarily in the valleys between the bumps. The difference in droplet nucleation rate between bumps and valleys can be attributed to the hexagonal microstructure on the surface of the valleys, whereas the surface of the bumps is smooth. The drops can slide when they reach a critical size, and be collected at the insect's mouth.
Graphical abstract</description><subject>Animal Shells - chemistry</subject><subject>Animal Shells - radiation effects</subject><subject>Animal Shells - ultrastructure</subject><subject>Animals</subject><subject>Biological and Medical Physics</subject><subject>Biological and medical sciences</subject><subject>Biophysics</subject><subject>Chemistry</subject><subject>Coleoptera - physiology</subject><subject>Coleoptera - ultrastructure</subject><subject>Complex Fluids and Microfluidics</subject><subject>Complex Systems</subject><subject>Desert Climate</subject><subject>Exact sciences and technology</subject><subject>Fundamental and applied biological sciences. Psychology</subject><subject>General and physical chemistry</subject><subject>Infrared Rays</subject><subject>Insecta</subject><subject>Invertebrates</subject><subject>Models, Theoretical</subject><subject>Nanotechnology</subject><subject>Phase Transition</subject><subject>Physics</subject><subject>Physics and Astronomy</subject><subject>Polymer Sciences</subject><subject>Regular Article</subject><subject>Skin - chemistry</subject><subject>Skin - radiation effects</subject><subject>Skin - ultrastructure</subject><subject>Soft and Granular Matter</subject><subject>Solid-liquid interface</subject><subject>Surface physical chemistry</subject><subject>Surfaces and Interfaces</subject><subject>Temperature</subject><subject>Thin Films</subject><subject>Water - chemistry</subject><subject>Waxes - analysis</subject><subject>Weather</subject><subject>Wettability</subject><issn>1292-8941</issn><issn>1292-895X</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2014</creationdate><recordtype>article</recordtype><sourceid>EIF</sourceid><recordid>eNp9kMtOwzAQRS0EoqXwAyxQNyBYhHrs2EmWVXlKldiAxM5y7AmkpEmxE1D_HvdB2SFZGstz5np0CDkFeg0Q0xEuZjgqGYU4ghhoFi33SB9YxqI0E6_7u3sMPXLk_YzSgFJ-SHpMhJpy2ScXN_g9NE1tsfa6LZt6GI5Fj64d5ohthUP_UdbH5KDQlceTbR2Ql7vb58lDNH26f5yMp5ERTLSR1UIXTDCTCQBrE5FIbVlhDE9i5MiK1PJMxGBznqdhA5lkTFNRYJJLEeeSD8jVJvddV2rhyrl2S9XoUj2Mp2r1RgG4DOwXBPZywy5c89mhb9W89AarStfYdF6BZBKkZIwGlG1Q4xrvHRa7bKBq5VKtXKq1S7V2qZZh6Gyb3-VztLuRX3kBON8C2htdFU7XpvR_XEZTDiIOHN9wPrTqN3Rq1nSuDh7_-_4HSZGMLQ</recordid><startdate>20141101</startdate><enddate>20141101</enddate><creator>Guadarrama-Cetina, J.</creator><creator>Mongruel, A.</creator><creator>Medici, M. -G.</creator><creator>Baquero, E.</creator><creator>Parker, A. 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Psychology</topic><topic>General and physical chemistry</topic><topic>Infrared Rays</topic><topic>Insecta</topic><topic>Invertebrates</topic><topic>Models, Theoretical</topic><topic>Nanotechnology</topic><topic>Phase Transition</topic><topic>Physics</topic><topic>Physics and Astronomy</topic><topic>Polymer Sciences</topic><topic>Regular Article</topic><topic>Skin - chemistry</topic><topic>Skin - radiation effects</topic><topic>Skin - ultrastructure</topic><topic>Soft and Granular Matter</topic><topic>Solid-liquid interface</topic><topic>Surface physical chemistry</topic><topic>Surfaces and Interfaces</topic><topic>Temperature</topic><topic>Thin Films</topic><topic>Water - chemistry</topic><topic>Waxes - analysis</topic><topic>Weather</topic><topic>Wettability</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Guadarrama-Cetina, J.</creatorcontrib><creatorcontrib>Mongruel, A.</creatorcontrib><creatorcontrib>Medici, M. -G.</creatorcontrib><creatorcontrib>Baquero, E.</creatorcontrib><creatorcontrib>Parker, A. 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R.</au><au>Milimouk-Melnytchuk, I.</au><au>González-Viñas, W.</au><au>Beysens, D.</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Dew condensation on desert beetle skin</atitle><jtitle>The European physical journal. E, Soft matter and biological physics</jtitle><stitle>Eur. Phys. J. E</stitle><addtitle>Eur Phys J E Soft Matter</addtitle><date>2014-11-01</date><risdate>2014</risdate><volume>37</volume><issue>11</issue><spage>109</spage><epage>109</epage><pages>109-109</pages><artnum>109</artnum><issn>1292-8941</issn><eissn>1292-895X</eissn><abstract>Some tenebrionind beetles inhabiting the Namib desert are known for using their body to collect water droplets from wind-blown fogs. We aim to determine whether dew water collection is also possible for desert insects. For this purpose, we investigated the infra-red emissivity, and the wetting and structural properties, of the surface of the elytra of a preserved specimen of
Physasterna cribripes
(Tenebrionidæ) beetle, where the macro-structure appears as a series of “bumps”, with “valleys” between them. Dew formation experiments were carried out in a condensation chamber. The surface properties (infra-red emissivity, wetting properties) were dominated by the wax at the elytra surface and, to a lower extent, its micro-structure. We performed scanning electron microscope on histological sections and determined the infra-red emissivity using a scanning pyrometer. The emissivity measured (0.95±0.07 between 8–14μm) was close to the black body value. Dew formation occurred on the insect’s elytra, which can be explained by these surface properties. From the surface coverage of the condensed drops it was found that dew forms primarily in the valleys between the bumps. The difference in droplet nucleation rate between bumps and valleys can be attributed to the hexagonal microstructure on the surface of the valleys, whereas the surface of the bumps is smooth. The drops can slide when they reach a critical size, and be collected at the insect's mouth.
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| subjects | Animal Shells - chemistry Animal Shells - radiation effects Animal Shells - ultrastructure Animals Biological and Medical Physics Biological and medical sciences Biophysics Chemistry Coleoptera - physiology Coleoptera - ultrastructure Complex Fluids and Microfluidics Complex Systems Desert Climate Exact sciences and technology Fundamental and applied biological sciences. Psychology General and physical chemistry Infrared Rays Insecta Invertebrates Models, Theoretical Nanotechnology Phase Transition Physics Physics and Astronomy Polymer Sciences Regular Article Skin - chemistry Skin - radiation effects Skin - ultrastructure Soft and Granular Matter Solid-liquid interface Surface physical chemistry Surfaces and Interfaces Temperature Thin Films Water - chemistry Waxes - analysis Weather Wettability |
| title | Dew condensation on desert beetle skin |
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