229,974 research outputs found
Asulconotus chinghaiensis Ying 1974
No full textAsulconotus chinghaiensis Ying, 1974 (Figs 38–39) http://orthoptera.speciesfile.org/Common/basic/Taxa.aspx?TaxonNameID=1105268 Asulconotus chinghaiensis Ying, 1974: 181–183, 186–187, figs 1–5, pl. I: 1 (holotype – male, China: Qinghai, Qumalai, 4400 m; in NPIB); Mistshenko, 1981: 118; Yin, 1984: 194–195, figs 411–412, pl. XXVII: 210–211; Zheng & Xia, 1998: 295– 296, fig. 158; Yin, Zheng & Yin, 2012: 753. Paranothrotes chinghaiensis Demirsoy; Otte, 1994: 185 (misplaced and erroneously Demirsoy as author, no year). Material examined. 1♁, 4♀, China: Sichuan, Ganzi (Lendagou), 31.72° N, 99.60° E, alt. 3810 m, 27 Aug. 2020, collected by Zhi-Pan Huang, deposited in BMDU. Distribution. China: Qinghai, Sichuan.Published as part of Mao, Ben-Yong & Huang, Zhi-Pang, 2023, Taxonomy on three allied genera within Arcypterini (Orthoptera: Acrididae) from Qinghai-Xizang Plateau, China, pp. 265-279 in Zootaxa 5239 (2) on page 277, DOI: 10.11646/zootaxa.5239.2.5, http://zenodo.org/record/762431
Hamicossus laevis Ying & Dong, 2007, sp. nov.
No full textHamicossus laevis sp. nov. (Fig. 3 A–B) Diagnosis: As for genus. Description: Head oval with a rostrum. Abdomen with at least 8 visible segments. Forewing triangular with distinct CP and nodal line. Sc with several oblique veinlets, fused with stem of R+M at basal, and arising from R+M before R+M separating into R and M, and fusing with R again little after R 1 arising from R. Rs simple. M fourbranched and bifurcating into M 1 + 2 and M 3 + 4 little after point of R 1 arising from R. M 4 sharply flexed after arising from M 3 + 4. Short crossvein rm present between Rs and M 1. Cu divided into CuA and CuP at base. CuA curved, joined with M by crossvein mcua and also connected with M 4 by long horizontal crossvein. CuA branched into CuA 1 and CuA 2. CuP single. Anal area with 1 visible vein. Nodal line traceable as indentation cross Sc+R and Rs to M 1 + 2, along with latter to branching point of M, dividing discal cells into two parts, following stem CuA and CuA 2, terminating at distal end of clavus. 2 nd discal cell nearly rectangle. Hind wing smaller than forewing, costal margin curved posteriorly, forming prominent indentation. Body 21 mm long, 13 mm wide; forewing 36 mm long, 16 mm wide; hind wing 20 mm long, 14 mm wide. Etymology: From the Latin ‘laevis’ = vein smooth, indicating the shape of crossvein m 4 cua. Material: The new species is established based on body with a pair of forewings and a pair of hind wings. Holotype: Body with wings compression, No.: CNUHNN 2006095. Horizon and locality: Jiulongshan Formation, Middle Jurassic, Daohugou Village, Shantou Township, Ningcheng County, Inner Mongolia, China.Published as part of Ying, Wang & Dong, Ren, 2007, Two new genera of fossil palaeontinids from the Middle Jurassic in Daohugou, Inner Mongolia, China (Hemiptera, Palaeontinidae), pp. 41-49 in Zootaxa 1390 on pages 47-48, DOI: 10.5281/zenodo.17523
Quadraticossus longicaulis Ying & Dong, 2007, sp. nov.
No full textQuadraticossus longicaulis sp. nov. (Fig. 2 A–B) Diagnosis: Sc with weak branches, terminating on R 1 near the middle of forewing. The stem of M is long and M bifurcated into M 1 + 2 and M 3 + 4 at the same level of Sc fusing with R 1.Crossvein mcua near point of Sc arising from Sc+R 1. Description: Forewing triangular with distinct CP and nodal line. Sc with weak branches, separated from R at base, fused with R at the level of M bifurcation into M 1 + 2 and M 3 + 4, extending at indentation and terminating on R 1. M branched into M 1 + 2 and M 3 + 4 little after point of R bifurcation into R 1 and Rs. M 1 + 2 and M 3 + 4 separated at same level. Crossvein rm near point of M 1 + 2 branching into M 1 and M 2. CuA curved joined with M by a crossvein mcua and also connected with M 4 by long horizontal crossvein. Nodal line traceable as indentation across point of Sc arising from Sc+R 1, along with R 1 for a short distance, then across Rs to M 1 + 2, along with latter to separating point of M, separating discal cells. Forewing with prominent color pattern consisting of hyaline patches on a dark ground. (Fig. 2. A, B). Forewing (preserved part) 40 mm long, 19 mm wide. Etymology: Specific epithet is a combination of Latin prefix longi (long) and caulis (stem), referring to the long stem of forewing vein M. Material: The new species is known from a single forewing. Holotype: A single forewing, with anal area missing, No.: CNUHNN 2006094. Horizon and locality: Jiulongshan Formation, Middle Jurassic, Daohugou Village, Shantou Township, Ningcheng County, Inner Mongolia, China. Remarks: This species is similar to Q. fangi sp. nov, but can be differentiated from the latter in the following features on the forewing: Sc with weak branches, terminating on R 1 near the middle of wing; M bifurcated into M 1 + 2 and M 3 + 4 at the same level of Sc fusing with R 1; crossvein rm near the point of M 1 + 2 branching into M 1 and M 2; m 4 cua is shorter than the latter. This new species is erected based on a single incomplete forewing, but we anticipate discovery of more wellpreserved specimens that will allow us to restudy this species in detail.Published as part of Ying, Wang & Dong, Ren, 2007, Two new genera of fossil palaeontinids from the Middle Jurassic in Daohugou, Inner Mongolia, China (Hemiptera, Palaeontinidae), pp. 41-49 in Zootaxa 1390 on pages 43-46, DOI: 10.5281/zenodo.17523
Th e new giant pterosaurs: novel anatomies and habits in the largest fl ying animals
No full textAbstract Azhdarchid pterosaurs, a derived group of Cretaceous pterodactyloids, are among the most famous of all fl ying reptiles. Instrumental to this fame is the attainment of giant proportions by several azhdarchid species, such as Quetzalcoatlus northropi and Hatzegopteryx thambema, which are the largest fl ying animals known with estimated wingspans of 10 m
Quadraticossus fangi Ying & Dong, 2007, sp. nov.
No full textQuadraticossus fangi sp. nov. (Fig. 1 A–F) Diagnosis: Sc without branches and terminating on R 1 near the distal part. M bifurcated into M 1 + 2 and M 3 + 4 at level of Rs arising from R. Horizontal crossvein m 4 cua long. Description: Head with pair of large eyes. Rostrum long but not reaching posterior margin of mesoscutum. In ventral view, legs partly preserved, femora stout, tibiae somewhat slender. Abdomen with at least 6 visible segments. Forewing triangular with distinct CP and nodal line. Sc without branches, separated from R at base, then fused with R after point of R separating into R 1 and Rs, extending beyond nodal line and terminating on R 1. M bifurcated into M 1 + 2 and M 3 + 4 at same level of Rs arising from R. M 1 + 2 and M 3 + 4 separated at same level. Crossvein rm present between Rs and M 1. Cu divided into CuA and CuP at base. CuA curved, irregular, joined with M by crossvein mcua and also connected with M 4 by long horizontal crossvein. CuA branched into CuA 1 and CuA 2 after point of M bifurcating into M 1 + 2 and M 3 + 4. CuP single. Vein A two branched, A 2 with branches. Nodal line traceable as indentation across Sc, and along with Sc for a short distance, then across Rs to M 1 + 2, along with the latter to branching point of M, separating discal cells into two unequal parts, following stem CuA and CuA 2, terminating at distal end of clavus. Hind wing smaller than forewing, costal margin curved posteriorly, forming prominent indentation. Rs coalesced with M 1 for long interval before separating. Stem of M 1 + 2 long, M 2 arising from M 1 at same level of Rs separating from R. M 4 not divided from M 3 + 4. Short crossvein m 3 + 4 cua present. CuA 1 fused with CuA 2 for long interval. Anal vein single. Both forewings and hind wings with prominent color pattern consisting of hyaline patches on a dark ground. (Fig. 1. A, B, C, D, F). Body 25 mm long, 15 mm wide; forewing 41mm long, 18 mm wide; hind wing 24 mm long, 16 mm wide. Etymology: This species is named after Mr. Fang Liang for his contribution in collecting Daohugou fossils, including this specimen. Material: The new species is established based on body with a pair of forewings and a pair of hind wings. Holotype: Body with wings compression, part and counterpart, No.: CNUHNN 2006093 1, CNUH NN 2006093 2. Horizon and locality: Jiulongshan Formation, Middle Jurassic, Daohugou Village, Shantou Township, Ningcheng County, Inner Mongolia, China.Published as part of Ying, Wang & Dong, Ren, 2007, Two new genera of fossil palaeontinids from the Middle Jurassic in Daohugou, Inner Mongolia, China (Hemiptera, Palaeontinidae), pp. 41-49 in Zootaxa 1390 on page 43, DOI: 10.5281/zenodo.17523
Enantioselective capillary electrophoresis : fundamental aspects and application to the "in vitro" assessment of CYP3A4 mediated ketamine N-demethylation
No full textA large number of pharmaceutical substances are administered as racemates, consisting of two enantiomers with typically different pharmacodynamic and pharmacokinetic profiles. Thus, stereoselective analysis is important in drug development, therapeutic drug monitoring and research. Chiral separation by chromatographic methods such as HPLC and GC require expensive stationary phases. In contrast, in capillary electrophoresis (CE), enantioselective separation can be obtained using one or several chiral selectors which are added to the background electrolyte. Separation of enantiomers is based on different binding affinities with the enantiomers and/or different migration velocities of the formed analyte-selector complexes. High resolution can be achieved by varying type and concentration of chiral selector as well as buffer properties (pH, ionic strength, other additives etc.). Typical chiral selectors are neutral or charged cyclodextrins, proteins and bile acids. The simplicity of the technique makes enantioselective CE an attractive, promising and economic methodology for drug and metabolite analysis in pharmaceutical preparations, body fluids, tissues and microsomal preparations.
In the first part of this thesis, fundamental aspects of enantioselective CE were investigated using computer simulation. Dynamic computer simulators provide insight into the buffer system and improve understanding of the electrophoretic separation process. Simulation allows to predict proper separation and detection conditions for analytes prior to experiments. Using an extended version of the dynamic computer simulator GENTRANS, the interaction of methadone and its main metabolite EDDP with neutral chiral selectors were simulated. Experimentally determined complexation constants and mobilites of the formed complexes were employed as additional input parameters. Simulated electropherograms were qualitatively in good agreement with the experimental results.
In the second and third parts of the thesis, enantioselective CE was applied to study ketamine metabolism in an off-line study. Ketamine is a chiral phencyclidine derivative used in anesthesia. In vitro and also in vivo studies showed a higher affinity for the NMDA-receptors, higher anesthetic potency and shorter recovery time for S-ketamine compared to R-ketamine. The aims in this project were to characterize the kinetics of CYP 3A4 mediated ketamine N-demethylation in vitro including KM, Vmax and to investigate the stereoselective metabolism of this pathway. Furthermore, the inhibition kinetics of this pathway by ketoconazole, a potent CYP3A4 inhibitor, was investigated. Results showed a higher formation rate for S-norketamine after incubation of racemic ketamine as well as incubation of the single enantiomers. Data obtained in the absence of ketoconazole revealed that the N-demethylation occurred stereoselectively. Inhibition kinetics by ketoconazole fitted best to a one-site competitive model and no stereoselectivity could be demonstrated.
In the forth and final part of this thesis, an on-line method was developed to investigate the in vitro N-demethylation of ketamine via CYP3A4, with the incubation performed in-capillary with subsequent electrophoretic separation and detection of the ketamine enantiomers. Kinetic parameters obtained compared well with those of the off-line study mentioned above and the metabolic step was stereoselective, confirming the results of the off-line assay. After additional improvements, the in-capillary method should be widely applicable to assess enzymatic activity in a fast, low-cost and automated way
Religious pathways to coping with personal death anxiety among older adult British Christians and Chinese Buddhists: afterlife beliefs, psychosocial maturity and regret management
No full textReligion was proposed to account for the relatively low personal death anxiety found among older adults. This dissertation sought to examine the influence of religious afterlife beliefs, religiously enhanced psychosocial maturity and religious management of a past major regret on personal death anxiety in later life. Terror Management Theory and Erikson’s Psychosocial Theory were used to describe these three religious pathways to coping with personal death anxiety in later life. The cross-sectional postal survey samples consisted of 143 older adult British Christians and 141 older adult Chinese Buddhists. Structural Equation Modelling results from the British Christian survey study showed that intrinsic religiosity predicted lower personal death anxiety through: (a) fostering more benign afterlife beliefs; (b) enhancing psychosocial maturity; and (c) promoting emotional stability. No significant relationship between belief in reincarnation and personal death anxiety was found in the Chinese Buddhist survey study. Both survey studies failed to support the personal death anxiety buffering power of religious management of a past major life regret, although some religious coping strategies were associated with lower negative emotional appraisal towards the major life regret among older adults. The British survey study has been the first to demonstrate both the personal death anxiety buffering and psychosocial maturity enhancing power of religion in an increasingly secular society. The lack of relationship between Buddhist reincarnation beliefs and personal death anxiety suggests that not all religious afterlife beliefs have death anxiety buffering power as proposed by Terror Management Theory. The development of Buddhist reincarnation belief and Buddhist coping scales is a pioneering step towards developing research on under-explored Eastern non-theistic afterlife beliefs and coping measures. Implications for ways that help religious older adults cope with their personal death anxiety were discussed. Prospective cross cultural and cross-religion studies were recommended to replicate the present survey findings. Finally, self detachment (self negation) was proposed as the basis of an alternative death transcendence theory to be researched in future studies on personal death anxiety
Dr. Duane M. Jackson, Morehouse College, July 2011
No full textThis video is a conversation with Dr. Duane M. Jackson. Dr. Jackson talks about his paper, "Recall and the Serial Position Effect: The Role of Primacy and Recency on Accounting Students' Performance." Jackie Daniel, AUC Woodruff Library, is the interviewer
"Reflections on the subject of Emigration from Europe with a view to Settlement in the United States" By M. Carey.
No full text"Reflections on the subject of Emigration from Europe with a view to Settlement in the United States: containing bried sketches of the moral and political character of those states.
By M. Carey, member of the American philosophical, and of the American Antiquarian Society, and author of The Olive Branch, Cindiciae Hibernicae, essays on banking, on political economy, and on internal improvement.
To which are now added the English editor's comments on the subject; together with Important Advice to Emigrants, and Cautions Against Impositions Practiced in the Outports
Dispelling the Myths Behind First-author Citation Counts
No full textWe conducted a full-scale evaluative citation analysis study of scholars in the XML research field to explore just how different from each other author rankings resulting from different citation counting methods actually are, and to demonstrate the capability of emerging data and tools on the Web in supporting more realistic citation counting methods. Our results contest some common arguments for the continued
use of first-author citation counts in the evaluation of scholars, such as high correlations between author rankings by first-author citation counts and other citation
counting methods, and high costs of using more realistic citation counting methods that are not well-supported by the ISI databases. It is argued that increasingly available digital full text research papers make it possible for citation analysis studies to go beyond what the ISI databases have directly supported and to employ more
sophisticated methods
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