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DIFFERENTIAL POLYNOMIAL RINGS WHICH ARE GENERALIZED ASANO PRIME RINGS
No full textLet R[x; 6] be a differential polynomialring over a prime Goldie ring R in an
indeterminate x, where 6 is a derivation of R. In this paper, we describe ex�plicitly the group of 6-stable v-R-ideals and using this results, we show that
R[x; 6] is a generalized Asano primering if and only if R is a 6-generalized
Asanoprimering.
Key words : Differential polynomial ring; generalized Asano primering;
prime Goldie ring; 5-stable v-ideal
Ophichthus megalops Asano 1987
No full textOphichthus megalops Asano, 1987 (English name: Large Eye Snake Eel) (Taiwanese common name: ƛēķḋ) Ophichthus megalops Asano, 1987:135 (type locality: Kumano-nada, off Owase, Mie Prefecture, Japan); Hatooka 2000:223 (off Owase, Mie); Hatooka 2013:223 (off Owase, Mie); McCosker 2010:28 (off Owase, Mie, Japan); McCosker et al. 2012:7 (Japan, key only); McCosker & Ho 2015:72 (Taiwan, key only); Ho et al. 2015:173 (in part; Nan-fang-ao, Taiwan). Specimens examined. FAK 19057, holotype, 325 mm TL, sexuality unknown, Kumano-nada coast, off Owase, Mie Prefecture, Japan, 360 m depth, bottom trawl, collected by H. Asano; KAUM–I. 125145, 330 mm TL, sexuality unknown, Dong-gang, Taiwan, depth unknown, bottom trawl, 26 Dec. 2018, collected by K. Koeda; NMMB-P12006, 7 specimens, 288–500 mm TL, sexuality unknown, Nan-fang-ao, Taiwan, depth unknown, bottom trawl, 11 Mar. 2011, collected by H.-C. Ho; NMMB-P 12193, 408 mm TL, sexuality unknown, Nan-fang-ao, Taiwan, 300–400 m depth, bottom trawl, 12 Jan. 2011, collected by H.-C. Ho; TOU-AE 6871–6878, 8 specimens, 299–442 mm TL, 7 mature females and 1 immature male, Nan-fang-ao, Taiwan, 300–400 m depth, bottom trawl, 15 Apr. 2013, collected by Y.-C. Chiu; TOU-AE 7153, 375 mm TL, sexuality unknown, Nan-fang-ao, Taiwan, 300–400 m depth, bottom trawl, 24 Jun. 2013, collected by Y.-C. Chiu. Diagnosis. A species of Ophichthus with a dark-tipped anal fin, and the following combination of characters: head 10.1–11.5% TL; tail 54.5–57.4% TL; snout blunt, 19.6–22.9% HL; eye large, 92.4–110.6% of snout length and 14.0–22.8% HL; dorsal-fin origin well behind pectoral-fin tip by about three times pectoral-fin length; pectoral fin short, pedal-shaped, tip not filamentous; anterior-nostril tube whitish; posterior nostril a hole above upper lip with a tiny flap anteriorly; teeth on maxilla biserial; SO 1+4; POM 6+3; total vertebrae 162–168 and MVF 31-61-164. Description. Counts and measurements are shown in Table 1. Body long, subcylindrical, its depth at gill openings 22.2–30.3 in TL; tail slightly compressed posteriorly, its depth reduced gradually, tip elongate (Fig. 1A). Head relatively large, branchial basket moderately expanded; head 8.7– 9.9 in TL; head and trunk 2.2–2.3 in TL; snout short, weakly acute, its length generally slightly longer than eye diameter; no ventral groove on snout; lower jaw included in upper jaw, its tip slightly beyond anterior base of anterior-nostril tube; mouth large, rictus well behind a vertical from posterior margin of eye, with a short, additional fold below rictus; eye large, 2.1–2.2 in upper jaw and 4.4–7.1 in head; anterior nostril a simple tube with a shallow notch on rim anteriorly; posterior nostril a hole opening outside mouth, above upper lip, slit-like with a short slim flap anteriorly; upper lip smooth, without protrusions, numerous small papillae on inner upper and lower lips; interorbital region smooth and mostly flat; gill opening constricted, located ventrolaterally (Fig. 2A). Dorsal and anal fins relatively low, ending with a ridge almost equal to half of snout length; dorsal-fin origin behind pectoral-fin tip, 2.5–4.3 times pectoral-fin length (2.5 in holotype), behind level of gill opening and 1.2–1.5 times in HL (1.2 in holotype); caudal fin absent; pectoral fin short, pedal-shaped, its tip pointed but not filamentous. Head pores small but obvious; arrangement of sensory pores on head as follows (Fig. 2A): one + four on supraorbital, one pore above the posterior rim of posterior nostril; three + three on infraorbital, one between anterior and posterior nostrils; six on mandible and three on preopercle; midtemporal and interorbital pores present. Lateral-line pores almost complete, 8–10 (10 in holotype) in branchial basket, 28–35 (32) anterior to dorsal-fin origin, 59–64 (61) anterior to anus, and 137–146 (141) in total, canal and pores absent in 0.6–0.9 times (0.7) of HL. Teeth relatively small, conical, pointed, weakly recurved posteriorly; teeth on maxilla biserial, those on outer row smaller and arranged close-set; mandibular teeth arrangement X-shaped: biserial on site near snout (less, 2–3) and rictus site (more, ca. 20), others uniserial (Fig. 2B, C); vomerine teeth biserial anteriorly and uniserial posteriorly; intermaxillary teeth arranged in a broken circular pattern, fused with row on vomer. Coloration when fresh (Fig. 1): head and body bluish to deep brownish dorsally and whitish on belly; peritoneum silver gray, with numerous minute, black dots along myomeres (Fig. 1B); anus generally without surrounding, darker marking or rarely less faded melanophores (only KAUM–I. 125145); tube of anterior nostril whitish; sensory pores not marginated. Dorsal fin white without darker margin; anal fin pale except distinct black end about 1/2 HL from tail tip (Fig. 1C); pectoral fin white. After preservation in 10% formalin and transferring in 75% ethanol, body coloration becomes monotonous. Etymology. The scientific name megalops refers to the remarkably large eye (Asano 1987). Distribution. Known from off Owase, Mie Prefecture, Japan (type locality); Nan-fang-ao, and Dong-gang, Taiwan, 300–400 m depth (Asano 1987; this study).Published as part of Hibino, Yusuke, Chiu, Yung-Chieh, Chen, Hong-Ming & Shao, Kwang-Tsao, 2019, Two new species of the genus Ophichthus from the western central Pacific Ocean with a redescription of Ophichthus megalops Asano, 1987 (Anguilliformes Ophichthidae), pp. 140-154 in Zootaxa 4702 (1) on pages 141-143, DOI: 10.11646/zootaxa.4702.1.17, http://zenodo.org/record/356275
On the conformation of the inversion transition states in the thermal E,Z isomerization of aromatic azomethines
No full textSTO-3G calculations with full geometry optimization on substituted formaldehyde- pyrazolone- and hexafluoroacetone-anils indicate different conformations of the linear inversion state in the thermal isomerization of aromatic azomethines dependent on the extent of push-pull conjugation in the molecular systems; based on this fact an explanation of Hammett plot deviations from linearity found for special azomethines becomes possible without the assumption of a competition between the inversion and rotation mechanism in the isomerization
Mechanism of thermal Z/E isomerization of aromatic azo compounds. Relation between rotation and inversion states
No full textAb initio calculations in a variation-perturbation scheme have been carried out on azobenzene and several substituted derivatives to clarify some mechanistic aspects of thermal Z/E isomerisation
Improved ID-based Authenticated Group Key Agreement Secure Against Impersonation Attack by Insider
No full textIntroduction - Principles and Historical Landmark of Enzyme Catalysis in Organic Synthesis
No full textGröger H, Asano Y. Introduction - Principles and Historical Landmark of Enzyme Catalysis in Organic Synthesis . In: Drauz K, Gröger H, May O, eds. Enzyme Catalysis in Organic Synthesis. Vol 1. 3rd ed. Weinheim: Wiley-VCH; 2012: 3-42
Going Beyond Counting First Authors in Author Co-citation Analysis
No full textThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
Cyanide-Free and Broadly Applicable Enantioselective Synthetic Platform for Chiral Nitriles through a Biocatalytic Approach
No full textBetke T, Rommelmann P, Oike K, Asano Y, Gröger H. Cyanide-Free and Broadly Applicable Enantioselective Synthetic Platform for Chiral Nitriles through a Biocatalytic Approach. Angewandte Chemie (International ed. in English). 2017;46(40):12361-12366
Development of Biocatalytic Processes in Japan and Germany: From Research Synergies to Industrial Applications
No full textGröger H, Asano Y, Bornscheuer UT, Ogawa J. Development of Biocatalytic Processes in Japan and Germany: From Research Synergies to Industrial Applications. Chemistry - An Asian Journal. 2012;7(6):1138-1153
Appropriate Similarity Measures for Author Cocitation Analysis
No full textWe provide a number of new insights into the methodological discussion about author cocitation analysis. We first argue that the use of the Pearson correlation for measuring the similarity between authors’ cocitation profiles is not very satisfactory. We then discuss what kind of similarity measures may be used as an alternative to the Pearson correlation. We consider three similarity measures in particular. One is the well-known cosine. The other two similarity measures have not been used before in the bibliometric literature. Finally, we show by means of an example that our findings have a high practical relevance.information science;Pearson correlation;cosine;similarity measure;author cocitation analysis
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