lanthanum/atrofiere

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Muscle cell membranes from early degeneration muscle cell fibers in Solenopsis are leaky to lanthanum: electron microscopy and X-ray analysis.

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Lanthanum infusion techniques, transmission electron microscopy, and X-ray microanalysis were utilized to compare the permeability of muscle cell membranes from normal and degenerating muscle fibers of Solenopsis spp. In normal fibers, the electron-dense tracer was limited to components of the

Intracellular and intramitochondrial binding of lanthanum in dark degenerating midgut cells of a collembolan (insect).

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Lanthanum is known to be a marker of extracellular spaces. Intracellular organelles are always devoid of stain. But dark and damaged cells may be entered by the marker, as studied at the cellular level, using the electron probe X-ray microanalyser. The technique may be used to detect increased

Review of the diagnosis of gastrointestinal lanthanum deposition.

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Lanthanum carbonate is used for treatment of hyperphosphatemia mostly in patients with chronic renal failure. Although lanthanum carbonate is safe, recently, lanthanum deposition in the gastrointestinal mucosa of patients has been reported in the literature. This review provides an overview of

The effect of physiologic aqueous solutions on the perovskite material lead-lanthanum-zirconium titanate (PLZT): potential retinotoxicity.

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BACKGROUND Perovskite compounds, including lead-lanthanum-zirconium titanate (PLZT), have wide technological application because of their unique physical properties. The use of PLZT in neuro-prosthetic systems, such as retinal implants, has been discussed in a number of publications. Since inorganic

Permeability of the pineal gland of the rat to lanthanum: significance of dark pinealocytes.

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The permeability of the pineal gland to lanthanum was investigated by means of transmission electron microscopy and X-ray microanalysis. Different pineal cell populations were studied. Light pinealocytes as well as glial cells were not permeated by the tracer lanthanum, which normally stays

Colloidal lanthanum as a marker for impaired plasma membrane permeability in ischemic dog myocardium.

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Colloidal lanthanum salts have an average particle size of 40 degrees A; consequently, this electron-opaque marker remains extracellular and does not cross the intact plasma membrane. The affinity of lanthanum for calcium-binding sites on mitochondrial membranes makes it possible to demonstrate loss

Permeability of Sertoli cell tight junctions to lanthanum after ligation of ductus deferens and ductuli efferentes.

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The permeability of Sertoli cell tight junctions to lanthanum administered during fixation has been compared in rats after ligation of the ductus deferens and after ligation of the ductuli efferentes. In both control and vasoligated testes, lanthanum penetrated only short distances into the Sertoli

[Application of BrdU-immunohistochemistry and lanthanum-tracer methods to the pathological evaluation of 1,3-dinitrobenzene testicular toxicity].

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The pathogenesis of 1,3-dinitrobenzene (1,3-DNB)-associated testicular toxicity was investigated in Sprague-Dawley rats with 5-bromo-2'-deoxyuridine (BrdU) immunohistochemistry and lanthanum-tracer methods as well as routine histopathological examination. Animals were killed at 8, 12, 24, 48 and 96

Lanthanum hexaboride hollow cathode for dense plasma production.

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A hollow tube cathode using lanthanum hexaboride as the electron emitter has been designed and constructed. Tests in both argon and hydrogen indicate that this cathode is capable of producing over 800 A of electron current continuously, corresponding to over 25 A/cm(2) from the LaB(6). The cathode

Novel in situ method based on diffusive gradients in thin-films with lanthanum oxide nanoparticles for measuring As, Sb, and V and in waters.

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Lanthanum oxide nanoparticles (nano-La₂O₃) was used to develop a novel binding gel within an in situ passive sampler based on diffusive gradients in thin-films technique (NL-DGT) for measuring As(V), Sb(V), and V(V). Performance characteristics of NL-DGT were independent of pH

Ultrastructural abnormalities and perifascicular atrophy in childhood dermatomyositis with special reference to transverse tubular system-sarcoplasmic reticulum junctions.

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Comparison of ultrastructural abnormalities between perifascicular and centrofascicular myofibers was made in the same muscle fascicles from six patients with childhood dermatomyositis. Consistent abnormalities are seen at the junctional sites between the transverse tubular system (TS) and

The blood-testis barrier in men with varicocele: a lanthanum tracer study.

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Testicular biopsy specimens were obtained from 28 otherwise healthy males (22 to 37 years old) with diagnosed varicocele. Tissue was processed for ultrastructural and intercellular tracer studies using lanthanum nitrate. In all cases Sertoli-Sertoli junctional complexes appeared structurally intact

Stability of the intra-epithelial component of the blood-testis barrier in epinephrine-induced testicular degeneration in Syrian hamsters.

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Adult male Syrian hamsters were given daily intraperitoneal injections of epinephrine (1.0 mg/kg) and papaverine, a vasodilator, (60 mg/kg) for a period of ten days. After the treatment period, lanthanum and horseradish peroxidase tracer studies were used to examine the intra-epithelial component of

A comparison of the long-term effects of lanthanum carbonate and calcium carbonate on the course of chronic renal failure in rats with adriamycin-induced nephropathy.

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Lanthanum carbonate (LA) is an effective phosphate binder. Previous study showed the phosphate-binding potency of LA was twice that of calcium carbonate (CA). No study in which LA and CA were given at an equivalent phosphate-binding potency to rats or humans with chronic renal failure for a long

[Ultrastructural study of the blood-testis barrier in rat by the lanthanum method].

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Ultrastructural changes of the testes in 35-week-old WBN/Kob rats were investigated using the lanthanum-tracer method. Tissues were cut and fixed with a solution containing 1% lanthanum and 2% glutaraldehyde in a 0.1 M sodium cacodylate buffer at pH 7.8 and with a solution of 2% osmium and 1%

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