197,985 research outputs found
Multitestis elongatus Machida 1982
No full textMultitestis elongatus Machida, 1982 (Figs 5–6) New material. Host: Platax pinnatus (Linnaeus), Ephippidae, dusky batfish (Ephippidae). Site: Intestine. Locality: Lizard Island (14°40’S, 145°28’E, April, 2008). Prevalence: 1 of 5. Voucher specimen: QM G 231061. Discussion. Measurements of the single specimen have been included in Table 1. According to Bray et al. (1994), Machida in a personal communication said he considered this species a synonym of Multitestis pyriformis. Having found one specimen that appears to us to be very distinct from M. pyriformis and which generally agrees with Machida’s (1982) description, we believe that Machida was correct originally to describe this form as a new species from Platax orbicularis off Palau. It differs from M. pyriformis in bodyshape (elongate oval vs pyriform; width 29% of body length (new specimen) to 39% (Machida’s data) vs 37– 73% - Machida (1982) fixed his worms under cover glass pressure which may (?) have exaggerated the width somewhat, so the higher figures relating to both species may be result of this fixation technique), sucker width ratio (1:0.97 (new), 0.97–1.00 (original) vs 1:1.01–1.40) and pre-testicular distance (49% (new), 52% (Machida’s data) of body-length vs 30–42%). In addition, the bulk of the cirrus-sac in M. elongatus is oriented antero-posteriorly versus mostly transverse in M. pyriformis.Published as part of Bray, Rodney A., Cribb, Thomas H. & Justine, Jean-Lou, 2010, Multitestis Manter 1931 (Digenea: Lepocreadiidae) in ephippid and chaetodontid fishes (Perciformes) in the south-western Pacific Ocean and the Indian Ocean off Western Australia, pp. 36-46 in Zootaxa 2427 on pages 40-42, DOI: 10.5281/zenodo.29425
Determination Of Local Temporal Electron Density And Temperature Using Visible Spectroscopy Of Carbon Emissions
No full text[No abstract available]212981301Nascimento, F., Machida, M., (2012) Journal of Physics: Conference Series, 370, p. 012053. , OnlineDaltrini, A.M., Machida, M., (2002) Brazilian J. of Physics, 32, p. 26Atomic Data and Analysis Structure, , http://www.adas.ac.uk/Behringer, K., (1989) Plasma Physics and Controled Fusion, 31, p. 2059Menmuir, S., (2006) Physica Scripta, 74, p. 439NIST Atomic Spectra Database, , http://physics.nist.gov/asd/Monteiro, M.J.R., Machida, M., (2005) Japanese Journal of Applied Physics, 44, p. 38
Bassozetus levistomatus Machida 1989
No full textBassozetus levistomatus Machida, 1989. 80.5 cm (31.7 in) SL. Circumglobal; western Pacific Ocean north to Izu-Ogasawara Trench (Nakabo in Nakabo 2002); central California (34°40’N, 125°05’W). Depth: 3,965 –5,200 m (13,005 –17,056 ft). All in Nielsen and Merrett (2000).Published as part of Love, Milton S., Bizzarro, Joseph J., Cornthwaite, Maria, Frable, Benjamin W. & Maslenikov, Katherine P., 2021, Checklist of marine and estuarine fishes from the Alaska-Yukon Border, Beaufort Sea, to Cabo San Lucas, Mexico, pp. 1-285 in Zootaxa 5053 (1) on page 81, DOI: 10.11646/zootaxa.5053.1.1, http://zenodo.org/record/557800
Measurements Of Plasma Edge Electron Temperature And Density Using Visible Spectroscopy In Nova-unicamp Tokamak
No full textThe electron temperature (Te) and density (ne) at the edge of NOVA-UNICAMP tokamak plasma were determined along the discharge using the concept of particle confinement time (τP) uniqueness and spectroscopic measurements of hydrogen Balmer series emissions. We have used three absolutely intensity calibrated spectrometers with photomultipliers for simultaneous measurements of hydrogen alpha, beta and gamma emissions throughout the discharges. With the use of data from Johnson and Hinnov's table, we have performed an interactive method to find electron temperatures and densities that satisfy the τP uniqueness to obtain the temporal evolution of Te and ne parameters. The results achieved are in agreement with the expected values for these parameters at the edge of the NOVA-UNICAMP tokamak plasma.3701 Instituto de Fisica del Plasma (INFIP),Cons. Nac. Invest. Cient. Tec. (CONICET),Comision Nacional de Energia Atomica (CNEA),Agencia Nacional de Promocion Cientifica y Tecnologica (ANPCyT),Centro Latino-Americano de Fisica (CLAF)Daltrini, A.M., Machida, M., (2002) Brazilian J. of Physics, 32, pp. 26-29Johnson, L.C., Hinnov, E., (1973) J. Quant. Spectrosc. Radiat. Transfer, 13, pp. 333-358Daltrini, A.M., Machida, M., (2005) Review of Scientific Instruments, 76, p. 053508Machida, M., (1995) Brazilian Journal of Physics, 25, pp. 7-13Griem, H.R., (1964) Plasma Spectroscopy, , USA: McGraw-Hill Book CompanyMonteiro, M.J.R., Machida, M., Daltrini, A.M., (2002) Brazilian J. of Physics, 32, pp. 54-56Wiese, W.L., Smith, M.W., Glennon, B.M., Hydrogen Through Neon - NSRDS-NBS 4 (1966) Atomic Transition Probabilities,
S. Kaizuka, Y. Ota, T. Koaze, K. Koike, M. Nogami, H. Machida et N. Yonekura, Géomorphologie illustrée (en japonais)
No full textPaskoff Roland. S. Kaizuka, Y. Ota, T. Koaze, K. Koike, M. Nogami, H. Machida et N. Yonekura, Géomorphologie illustrée (en japonais). In: Annales de Géographie, t. 96, n°536, 1987. p. 490
Low-angle Thomson Scattering Experiment For Determination Of Plasma Electron Density And Temperature
No full textIn this work we show results of measurements of the electron density ne and temperature Te by using small-angle Thomson scattering in a theta-pinch plasma. The method of measurement and analysis developed here is based on integration of only two ranges of the scattering profile. This method simplifies the experimental set up, because it needs only two detectors for simultaneous determination of ne and Te, instead of the commonly 5-7 detectors used in 90° experiments. The results obtained for low-angle scattering are compared with the measurements at 90° using single pass and multipass under the same plasma conditions.25601/02/15437441Berni, L.A., Campos, D.O., Machida, M., Moshkalyov, S.A., Lebedev, S.V., Molecular Rayleigh scattering as calibration method for Thomson scattering experiments (1996) Brazilian Journal of Physics, 26 (4), p. 755Campos, D.O., Machida, M., Berni, L.A., Moshkalyov, S.A., Lebedev, S.V., The feasibility study of a low-angle Thomson scattering for determination of plasma electron density and temperature (1995) 3o, Encontro Brasileiro de Física dos Plasmas - Fifth Brazilian Plasma Astrophysics Workshop, , Águas de Lindóida, SP, 4-6 December 1995Campos, D.O., Machida, M., Berni, L.A., Kantor, M., Moshkalyov, S.A., Lebedev, S.V., Experimental study of conventional and multipass Thomson scattering diagnostics (1996) Japanese Journal of Applied Physics, 35 (12 A), p. 6273Campos, D.O., Machida, M., Berni, L.A., Kantor, M., Moshkalyov, S.A., Lebedev, S.V., The application of a multipass system for Thomson scattering diagnostics in magnetically confined plasmas (1996) Brazilian Journal of Physics, 26 (4), p. 742Sheffield, J., (1975) Plasma Scattering of Electromagnetic Radiation, , Academic Press, New Yor
Optical Diagnostics For The Study Of Plasma Evolution In Linear Theta-pinch Tc-1
No full textThe plasma generated in the field reversed theta-pinch TC-1 discharge was investigated by means of a number of optical diagnostics: CO2 laser-based interferometry, visible-VUV spectroscopy and ruby laser Thomson scattering. The evolution of the local electron density was studied by CO2 laser intereferometry. Thomson scattering was employed for measurements of the electron density and temperature with high spatial resolution. The temporal behavior of line emission of oxygen and carbon in various ionization stages was studied by VUV spectroscopy. The time dependence of the electron temperature was evaluated from the analysis of the time history of line emission of impurity ions. The ion temperature was measured from the Doppler-broadened oxygen line emission profiles.264747754Aramaki, E.A., Porto, P., Berni, L., Honda, R.Y., Ueda, M., Doi, I., Machida, M., (1989) Nucl. Instr. Meth. Phys. Res., A, 280, p. 597Tuszewski, M., (1988) Nuclear Fusion, 28, p. 2033Campos, D.O., Machida, M., Berni, L.A., Kantor, M.Yu., Moshkalyov, S.A., Lebedev, S.V., (1995) Proc. de 30 Encontro Bras. de Física dos Plasmas, p. 90. , Águas de Lindóia, SP, BrasilBerni, L.A., Campos, D.O., Machida, M., Moshkalyov, S.A., Lebedev, S.V., Monteiro, M.J.R., Zibordi, R., (1995) Proc. de 30 Encontro Bras. de Física dos Plasmas, p. 79. , Águas de Lindóia, SP, BrasilMoshkalyov, S.A., Machida, M., Lebedev, S.V., Campos, D.O., (1995) Revista Bras. de Física Appl. Instr., 10, p. 107Greve, P., Kato, M., Kunze, H.-J., Hornady, R.S., (1981) Phys.Rev., A, 24, p. 429Kunze, H.-J., (1971) Phys.Rev., A, 3, p. 93
Apterichtus orientalis Machida and Ohta 1994
No full textApterichtus orientalis Machida and Ohta 1994 Table 1 Apterichtus orientalis Machida and Ohta 1994: 1, Figs. 2–4 (type locality Southeast of Kii Peninsula, Wakayama Prefecture, Japan, holotype BSKU 81631). Diagnosis. An elongate species with: tail 1.8, head 12–14, and body depth 53–55 in total length; 3 preopercular pores and 7 pores in supratemporal canal; teeth conical, uniserial, 9 in ethmoidal region, 1 tooth on vomer; body coloration uniform pale yellow with small brownish dots, lighter ventrally; and MVF 54–132, total vertebrae 131–133 (n= 2). Size. The largest specimen examined is 443 mm, sex unknown. The holotype (318 mm TL) is a female with ripened eggs. Distribution. Known from the holotype, which was collected from Kii Peninsula, central Honshu Island, Japan by dredge over sand and mud at 79–81 m depth, and a specimen from Kochi Prefecture, Shikoku Island, Japan. Remarks. This species has more cephalic pores than any Apterichtus other than A. monodi, A. hatookai and A. jeffwilliamsi. It differs from A. monodi by having fewer vertebrae (131–133 vs. 142–151) and from A. hatookai and A. jeffwilliamsi by having 3 rather than 4 preopercular pores. The holotype of A. orientalis has 4 right and 3 left preopercular pores. Its other cephalic pores are symmetrical in location and number. An additional pore exists on both sides before the middle of the eye about midway to the base of the anterior nostril. Machida and Ohta (1994) infer that the posterior right mandibular pore is located in the preopercular canal rather than the mandibular canal, explaining the 5 + 4 (left) and 6 + 3 (right) condition. The second known specimen has 6 + 3 pores on both sides, which appears to be the normal condition for this species. Machida and Ohta (1994) also reported that the holotype of A. orientalis has no teeth on its vomer. We examined the holotype and found it to have a prominent hole in the prevomerine region (the tooth was probably lost). The second specimen has a relatively large vomerine tooth. Material examined. BSKU 81631, holotype, 318 mm, Southwest of Kii Peninsula, Wakayama Prefecture, Japan (33 ° 26.4 'N, 135 ° 43.8 'E to 33 ° 26.2 'N, 135 ° 44.3 'E), 79– 81 m. NSMT-P 115430, 443 mm, Kashiwajima, Kochi Prefecture, Japan, depth unknown.Published as part of Hibino, Yusuke, 2015, A review of the finless snake eels of the genus Apterichtus (Anguilliformes: Ophichthidae), with the description of five new species, pp. 49-78 in Zootaxa 3941 (1) on page 75, DOI: 10.11646/zootaxa.3941.1.2, http://zenodo.org/record/28821
Hastatobythites Machida 1997
No full textHastatobythites Machida, 1997 Hastatobythites Machida 1997: 385, type species by original designation Hastatobythites arafurensis Machida, 1997. Hastatobythites: Nielsen et al. 1999: 105. Diagnosis. A monotypic genus of the subfamily Bythitinae (Cohen & Nielsen 1978: 42) with the following characters: two spines placed in midline of head, one anteriorly directed on frontal above eye and another upward directed, weak and thin on ethmoid, three bony ridges on dorsum behind frontal spine; maximum width of head 5.6 –6.0% SL and of body 3.5–3.9 % SL. Also the following combination of characters is diagnostic: Elongate body with joined vertical fins; head naked and anterior part of body with scattered scales in midline and posterior half of body almost fully scaled; skin thin, translucent; eye diameter less than snout-length; opercular spine covered by skin; posterior part of maxilla greatly expanded vertically; dentigerous bones with granular teeth; palatines with 2–3 tooth rows; pectoral peduncle slightly longer than broad, not adnate; gill opening extending well above opercular spine; anterior gill arch with three long rakers; precaudal vertebrae 15 and total vertebrae 57–58; fin rays in dorsal 99–100, caudal 12, anal 64–65 and pectoral 16–17; otolith length to height = 2.5, sulcus undivided, placed in central part of inner face, otolith length to sulcus length = 2.7. Similarity. Hastatobythites is most similar to Saccogaster in having more or less prolonged pectoral radials, naked head, teeth on palatines and thin skin. Hastatobythites differs from Saccogaster by having one median spine on frontal plate (vs. a pair or none), very narrow head (5.6 –6.0 % SL vs. 10.5 –15.0 % SL) and body (3.5–3.9 % SL vs. 4.2–9.5 % SL) and three median bony ridges behind frontal spine (absent or one in Saccogaster). Hastatobythites differs from Parasaccogaster n. gen. in the very narrow head, three median bony ridges behind frontal spine, prolonged free pectoral radials (vs. adnate) and the thin, tight head skin (vs. thick and loose). Pectoral Dorsal Anal Species 75 77 79 81 83 85 87 89 91 93 95 97 99 37 39 41 43 45 47 49 51 53 55 57 59 61 63 65 12 13 14 15 16 17 18 19 20 21 22 23 – 74 – 76 78 – 80 – 82 – 84 – – 86 – 88 – 90 92 – – 94 96 – 98 – 100 – 36 – 38 – 40 42 – – 44 46– 48 – 50 – – 52 54– 56 – 58 – 60 – 62 – 64 – H. arafurensis + + + + + P. melanomycter + + + P. normae + + + + + + + + P. rhamphidognatha + + + S. brayi + + + S. hawaii + + + S. horrida + + + S. maculata + + + + + + + S. nikoliviae + + + + + + + + S. parva + + + S. staigeri + + + + + + + S. tuberculata + + + + + + + + + + + + + +Published as part of Nielsen, Jørgen G., Schwarzhans, Werner & Cohen, Daniel M., 2012, Revision of Hastatobythites and Saccogaster (Teleostei, Bythitidae) with three new species and a new genus, pp. 1-36 in Zootaxa 3579 on pages 3-4, DOI: 10.5281/zenodo.20867
An anomalous phylogenetic position for Deraiotrema platacis Machida, 1982 (Lepocreadiidae) from Platax pinnatus on the Great Barrier Reef
No full textThe monotypic genus Deraiotrema Machida, 1982 has only been reported once, from the orbicular batfish Platax orbicularis (Forsskål) in the waters around Palau in Micronesia (Machida, 1982). It has a body-shape similar to other lepocreadiids from batfishes, such as species of Bianium Stunkard, 1930 and Diploproctodaeum La Rue, 1926, but differs in having multiple testes in ventral and dorsal layers. Here we report Deraiotrema platacis Machida, 1982 for just the second time, infecting the dusky batfish Platax pinnatus (Linnaeus) from the waters off Lizard Island on the northern Great Barrier Reef. We present a molecular phylogenetic analysis of the position of this genus inferred from 28S rDNA sequences. Surprisingly, we find the species most closely related to Echeneidocoelium indicum despite the infection of completely unrelated hosts and the presence of two characters (lateral fold in the forebody and multiple testes) that are found elsewhere in the Lepocreadiidae. We conclude that homoplasy within the Lepocreadiidae is extensive and that morphology-based prediction of relationships has little prospect of success
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