Morphological differences between two closely related East Asian flatfish species of the genus Pleuronichthys, with particular emphasis on growth-related changes

Because of the taxonomic confusion, including misapplication of their scientific names, resulting from the morphological similarity of two East Asian flatfish species, Pleuronichthys lighti Wu, 1929 and Pleuronichthys cornutus (Temminck & Schlegel, 1846), both species are redescribed, with particular emphasis on some new key characters. New common names are proposed for each species.

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Maxims of Foreign Policy

Itinerario ◽

10.1017/s0165115300044508 ◽

2000 ◽

Vol 24 (2) ◽

pp. 62-79

Author(s):

W.J. Boot

Keyword(s):

Foreign Policy ◽

Sixteenth Century ◽

Foreign Relations ◽

East Asian ◽

Modern Period ◽

Cultural Sphere ◽

Japanese Identity

In the pre-modern period, Japanese identity was articulated in contrast with China. It was, however, articulated in reference to criteria that were commonly accepted in the whole East-Asian cultural sphere; criteria, therefore, that were Chinese in origin.One of the fields in which Japan's conception of a Japanese identity was enacted was that of foreign relations, i.e. of Japan's relations with China, the various kingdoms in Korea, and from the second half of the sixteenth century onwards, with the Portuguese, Spaniards, Dutchmen, and the Kingdom of the Ryūkū.

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A scanning electron microscopic study of the eggs of Culicoides variipennis (Diptera: Ceratopogonidae)

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100128705 ◽

1987 ◽

Vol 45 ◽

pp. 884-885 ◽

Cited By ~ 1

Author(s):

R. A. Nunamaker ◽

C. E. Nunamaker ◽

B. C. Wick

Keyword(s):

Distinct Species ◽

Hemorrhagic Disease ◽

Insect Vector ◽

Electron Microscopic ◽

Important Species ◽

Scanning Electron Microscopic Study ◽

Laboratory Colony ◽

Culicoides Variipennis ◽

Morphological Differences ◽

Scanning Electron

Culicoides variipennis (Coquillett) is probably the most economically important species of biting midge in the U.S. due to its involvement in the transmission of bluetongue (BT) disease of sheep, cattle and ruminant wildlife, and epizootic hemorrhagic disease (EHD) of deer. Proposals have been made to recognize the eastern and western populations of this insect vector as distinct species. Others recommend use of the term “variipennis complex” until such time that the necessary biosystematic studies have been made to determine the genetic nature and/or minute morphological differences within the population structure over the entire geographic range of the species. Increasingly, students of ootaxonomy are relying on scanning electron microscopy (SEM) to assess chorionic features. This study was undertaken to provide comparative chorionic data for the C. variipennis complex.Culicoides variipennis eggs were collected from a laboratory colony maintained in Laramie, Wyoming.

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Morphologic differences between abdominal and inguinal testes in stallions

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100128389 ◽

1987 ◽

Vol 45 ◽

pp. 820-821

Author(s):

F. Al-Bagdadi ◽

D. Hoyt ◽

P. Karns ◽

G. Martin ◽

M. Memon ◽

...

Keyword(s):

Carcinoma Cells ◽

Genital System ◽

Diagnosis And Prognosis ◽

Male Genital System ◽

Morphological Differences ◽

Hormone Imbalance ◽

Made In ◽

Male Genital

The most frequently occuring abnormality of the male genital system in mammals is the failure of one or both testes to descend into the scrotum. The reasons for abdominal or inguinal retention of testes could be anatomic malformation, faulty development or hormone imbalance.Cryptorchidism has been associated with either greatly reduced or absent spermatogenesis (Kaueakami et al, 1984), and being a source of neoplasia. According to Stick (1980), germinal carcinoma cells have been believed to be the cause of teratomas in equine cryptorchid testicles. Neoplasia has been reported in descended testes of unilateral cryptorchid patients (Martin et al, 1981).No distinction has been made in relating the problem of cryptorchid testes to inguinal or abdominal retention. The purpose of this study is to record the morphological differences between inguinal and abdominal cryptorchid testes as an aid in diagnosis and prognosis.

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Observation of pseudo 10-fold symmetry in the ordered iron-zinc delta phase

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100120588 ◽

1992 ◽

Vol 50 (1) ◽

pp. 36-37

Author(s):

L. A. Giannuzzi ◽

A. S. Ramani ◽

P. R. Howell ◽

H. W. Pickering ◽

W. R. Bitler

Keyword(s):

Single Phase ◽

X Ray Diffraction ◽

Rich Region ◽

Average Cell ◽

X Ray ◽

Delta Phase ◽

Cell Dimensions ◽

Δ Phase ◽

Morphological Differences ◽

Concentration Discontinuity

The δ phase is a Zn-rich intermetallic, having a composition range of ∼ 86.5 - 92.0 atomic percent Zn, and is stable up to 665°C. The stoichiometry of the δ phase has been reported as FeZn7 and FeZn10 The deviation in stoichiometry can be attributed to variations in alloy composition used by each investigator. The structure of the δ phase, as determined by powder x-ray diffraction, is hexagonal (P63mc or P63/mmc) with cell dimensions a = 1.28 nm, c = 5.76 nm, and 555±8 atoms per unit cell. Later work suggested that the layer produced by hot-dip galvanizing should be considered as two distinct phases which are characterized by their morphological differences, namely: the iron-rich region with a compact appearance (δk) and the zinc-rich region with a columnar or palisade microstructure (δp). The sub-division of the δ phase was also based on differences in diffusion behavior, and a concentration discontinuity across the δp/δk boundary. However, work utilizing Weisenberg photographs on δ single crystals reported that the variation in lattice parameters with composition was small and hence, structurally, the δk phase and the δp phase were the same and should be thought of as a single phase, δ. Bastin et al. determined the average cell dimensions to be a = 1.28 nm and c = 5.71 nm, and suggested that perhaps some kind of ordering process, which would not be observed by x-ray diffraction, may be responsible for the morphological differences within the δ phase.

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Gender determination of caucasoid hair using image analysis

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100146928 ◽

1993 ◽

Vol 51 ◽

pp. 216-217

Author(s):

T.B. Ball ◽

W.M. Hess

Keyword(s):

Image Analysis ◽

Cross Sections ◽

Scalp Hair ◽

The Body ◽

Equivalent Diameter ◽

Cross Sectional ◽

Hair Samples ◽

Length Width ◽

Morphological Differences

It has been demonstrated that cross sections of bundles of hair can be effectively studied using image analysis. These studies can help to elucidate morphological differences of hair from one region of the body to another. The purpose of the present investigation was to use image analysis to determine whether morphological differences could be demonstrated between male and female human Caucasian terminal scalp hair.Hair samples were taken from the back of the head from 18 caucasoid males and 13 caucasoid females (Figs. 1-2). Bundles of 50 hairs were processed for cross-sectional examination and then analyzed using Prism Image Analysis software on a Macintosh llci computer. Twenty morphological parameters of size and shape were evaluated for each hair cross-section. The size parameters evaluated were area, convex area, perimeter, convex perimeter, length, breadth, fiber length, width, equivalent diameter, and inscribed radius. The shape parameters considered were formfactor, roundness, convexity, solidity, compactness, aspect ratio, elongation, curl, and fractal dimension.

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