tungsten/sarcoma

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In vivo corrosion, tumor outcome, and microarray gene expression for two types of muscle-implanted tungsten alloys.

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Tungsten alloys are composed of tungsten microparticles embedded in a solid matrix of transition metals such as nickel, cobalt, or iron. To understand the toxicology of these alloys, male F344 rats were intramuscularly implanted with pellets of tungsten/nickel/cobalt, tungsten/nickel/iron, or pure

The Role of the Component Metals in the Toxicity of Military-Grade Tungsten Alloy.

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Tungsten-based composites have been recommended as a suitable replacement for depleted uranium. Unfortunately, one of these mixtures composed of tungsten (W), nickel (Ni) and cobalt (Co) induced rhabdomyosarcomas when implanted into the leg muscle of laboratory rats and mice to simulate a shrapnel

Surface applicators for high dose rate brachytherapy in AIDS-related Kaposi's sarcoma.

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OBJECTIVE The development of commercially available surface applicators using high dose rate remote afterloading devices has enabled radiotherapy centers to treat selected superficial lesions using a remote afterloading brachytherapy unit. The dosimetric parameters of these applicators, the clinical

Anti-tumor and immunomodulatory activity of iron hepta-tungsten phosphate oxygen clusters complex.

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Polyoxometalates (POMs) have attracted a considerable attention due to their unique structural characteristics, physicochemical properties and biological activities. In this study, iron hepta-tungsten phosphate oxygen clusters complex Na12H[Fe(HPW7O28)2]·44H2O (IHTPO) was synthesized and evaluated

Digital image processing of crystalline specimens examined by electron microscopy.

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Crystalline specimens imaged in the electron microscope are analysed using digital processing. Some principles of structural analysis using the method of Fourier decomposition are discussed. Complementary techniques, such as enhancement by gradient and Laplacian operators, have been found useful in

Photocarcinogenesis by methoxypsoralen, neutral red, proflavine, and long UV radiation.

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A study of the photosensitizing effects of 8-methoxypsoralen (MOP), neutral red (NR), and proflavine (PF) on the skin of female Swiss albino mice, strain 955, was carried out using fractionated exposure to long ultraviolet light (300-400 nm) and visible light (tungsten emission). The results (1)

Mutagenicity, carcinogenicity and teratogenicity of cobalt metal and cobalt compounds.

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Cobalt metal and cobalt compounds are extensively used for the production of high-temperature alloys, diamond tools, cemented carbides and hard metals, for the production of various salts used in electroplating and as catalysts, drying agents in paints, additives in animal feeds and pigments. Cobalt

[Affinity of the elements in group VI of the periodic table to tumors and organs].

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In order to investigate the tumor affinity radioisotopes, chromium (51Cr), molybdenum (99Mo), tungsten (181W), selenium (75Se) and tellurium (127mTe)--the elements of group VI in the periodic table--were examined, using the rats which were subcutaneously transplanted with Yoshida sarcoma. Seven

Reactive oxygen species mediated membrane damage induced by fullerene derivatives and its possible biological implications.

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Fullerenes have attracted considerable attention in recent years due to their unique chemical structure and potential applications. Hence it is of interest to study their biological effects. Using rat liver microsomes as model systems we have examined the ability of the most commonly used fullerene,

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