Search Results - (Author, Cooperation:W. A. Reid)

2014-08-16

American Association for the Advancement of Science (AAAS)

0036-8075

1095-9203

Biology

Chemistry and Pharmacology

Computer Science

Medicine

Natural Sciences in General

Physics

1365-2230

Blackwell Publishing Journal Backfiles 1879-2005

Medicine

Papuloerythroderma has been described as a distinct clinical entity. It is characterized by pruritus, red flat-topped papules with skin crease sparing, blood eosinophilia and lymphopenia. It has been described almost exclusively in elderly men. We report a case of cutaneous T-cell lymphoma which, at presentation, was indistinguishable from papuloerythroderma, in a 79-year-old male. An excellent clinical response to low dose oral corticosteroids and photochemotherapy was observed. There have only been two previous reports linking papuloerythroderma with T-cell lymphoma. This patient is in keeping with the two previously reported cases and would support the view that papuloerythroderma may predispose to, or in fact represent, an early form of cutaneous T-cell lymphoma.

Electronic Resource

1365-2559

Blackwell Publishing Journal Backfiles 1879-2005

Medicine

Angioleiomyoma is frequently painful and the cause of the pain is unknown. The purpose of this study was to compare the mast cell population and innervation of painful and painless angioleiomyomas. Twenty-four cases of angioleiomyoma were examined; 16 painful and 8 painless cases. Pinacyanol erythrosinate and antibodies to protein gene product (PGP) 9.5 were used to demonstrate mast cells and nerves respectively. PGP 9.5-immunoreactive nerve fibres were found in most of the painful (13/16 cases) and painless lesions (5/8). Mast cells were not seen in half of the painful lesions but were seen in most of the painless lesions (7/8). The median mast cell density was 1.1 cells/mm2 for the painful lesions and 21.9 cells/mm2 for the painless lesions (P= 0.048, Mann-Whitney test). The lower mast cell density in the painful lesions may reflect increased mast cell degranulation. It is proposed that neural and vascular events, similar to those occurring in the triple response to mild cutaneous injury, may produce pain in angioleiomyoma and other painful skin tumours.

Electronic Resource

1573-4803

Springer Online Journal Archives 1860-2000

Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics

Abstract This paper summarizes the development of engineering ceramics made from bauxite waste (“red mud”) produced in the alumina industry in Jamaica. Test specimens are fabricated from powders by sintering. For a particle size distribution of less than 75μm in the starting powders and firing temperatures in the range of 1000 to 1100° C various mechanical properties are measured. These include fracture toughness (K Ic), modulus of rupture (MOR), compression strength (σ c) and Brinell hardness. While apparent porosity varies between 40 and 48%, K Ic is found to vary between 0.39 and 0.68 MN m−3/2. The values are compared with those measured for commercial ceramic tiles and also with ceramics of magnesia and calcium zirconate. Within the fabrication temperature range studied the MOR ranges between 17.23 and 27.09 MN m−2, compressive strength between 42.0 and 83.9 MN m−2 and Brinell hardness between 26.2 and 59.9 kg mm−2. With the aid of scanning electron microscopy and a basic knowledge of the physicochemical properties of the mud an attempt is made to explain the high strength and toughness achieved. The ready availability of raw material and the relatively low firing temperatures required for suitable engineering products should keep the production costs low for “red mud ceramics”.

Electronic Resource

1432-0878

Seminal fluid ; Acid proteinase ; Prostate gland ; Gastricsin

Springer Online Journal Archives 1860-2000

Biology

Medicine

Summary On the basis of a) kinetic data obtained with a synthetic substrate and two peptide inhibitors and b) immunological cross-reactivity, it is shown that the aspartic proteinase of human seminal fluid is a gastricsin. The source of the precursor (progastricsin) in the male genital tract is identified to be the prostate.

Electronic Resource

1573-174X

Springer Online Journal Archives 1860-2000

Nature of Science, Research, Systems of Higher Education, Museum Science

Electronic Resource

1432-136X

Key words Compound eye ; Growth ; Development ; Age ; Crustacean ; Petrolisthes

Springer Online Journal Archives 1860-2000

Biology

Medicine

Abstract  Fifty randomly selected publications dealing with aspects of crustacean vision had their Materials and methods sections examined. In half of the articles gleaned, only the name of the animal under study was given; the other half mentioned “adult” or “mature” animals; twelve papers provided information on size or age of the experimental animal and six gave the sex. In Petrolisthes elongatus, rhabdom microvilli not only become more regular in outline as the animal grows, but also decrease in diameter from 90.4±21.2 nm in crabs of 5.0–8.9 mm carapace length via 86.6±13 nm in crabs of 9.0–12.9 mm carapace length to 79.7±7 nm in crabs of 13.0–16.9 mm carapace length. Approximately 400 cross sectional diameters of microvilli from identical regions in four eyes of each size class were measured and provided the basis for Anova-, Levene-, and t-tests. The three size classes possess microvilli of significantly different diameters and standard deviations. Our observations show that investigators of the crustacean photoreceptor have frequently neglected to consider the size of their experimental animals, but that this practice should not be continued as the now documented changes in microvillus diameters may influence the amount of visual pigment present and, thus, the photoreceptor’s sensitivity to light.

Electronic Resource

1432-136X

Compound eye ; Growth ; Development ; Age ; Crustacean ; Petrolisthes

Springer Online Journal Archives 1860-2000

Biology

Medicine

Abstract Fifty randomly selected publications dealing with aspects of crustacean vision had theirMaterials and methods sections examined. In half of the articles gleaned, only the name of the animal under study was given; the other half mentioned “adult” or “mature” animals; twelve papers provided information on size or age of the experimental animal and six gave the sex. InPetrolisthes elongatus, rhabdom microvilli not only become more regular in outline as the animal grows, but also decrease in diameter from 90.4±21.2 nm in crabs of 5.0–8.9 mm carapace length via 86.6±13 nm in crabs of 9.0–12.9 mm carapace length to 79.7±7 nm in crabs of 13.0–16.9 mm carapace length. Approximately 400 cross sectional diameters of microvilli from identical regions in four eyes of each size class were measured and provided the basis for Anova-, Levene-, andt-tests. The three size classes possess microvilli of significantly different diameters and standard deviations. Our observations show that investigators of the crustacean photoreceptor have frequently neglected to consider the size of their experimental animals, but that this practice should not be continued as the now documented changes in microvillus diameters may influence the amount of visual pigment present and, thus, the photoreceptor's sensitivity to light.

Electronic Resource