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14 rezultatima
Peracute vanadium toxicity in cattle grazing near a vanadium mine.
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Prijava Registriraj se
Animals may act as bioindicators for potential human health problems associated with mining and refining. Eight cattle died after a vanadium mine dam collapsed close to the area in which they were grazing. Necropsies were conducted on five cattle. Affected animals had shown a watery bloody diarrhea,
Cerebrospinal fluid nitrite/nitrate correlated with oxyhemoglobin and outcome in patients with subarachnoid hemorrhage.
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The findings of various studies reporting temporal changes in CSF total nitrite/nitrate (NOx) levels after subarachnoid hemorrhage (SAH) vary considerably. The study group comprised 10 patients with SAH and 10 control subjects. Total nitrite/nitrate concentration was measured by a vanadium-based
[Study of teratogenicity and sensitive period of vanadium pentoxide in Wistar rats].
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Pregnant Wistar rats were administered with vanadium pentoxide (V2O5) in three different ways single intraperitoneal injection (ip) of V2O5 5mg/kg on days 9, 10, and 11 of gestation; ip 5mg/kg/day on days 9-12 of gestation; and ip 3mg/kg/day on days 6-15 of gestation. The results showed that the
Toxicity and hazard of vanadium to mallard ducks (Anas platyrhynchos) and Canada geese (Branta canadensis).
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A recent Canada goose (Branta canadensis) die-off at a petroleum refinery fly ash pond in Delaware was attributed to vanadium (V) toxicity. Because of the paucity of V toxicity data for wild birds, a series of studies was undertaken using the forms of V believed to have resulted in this incident. In
Vanadium.
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Vanadium is a steel-grey, corrosion-resistant metal, which exists in oxidation states ranging from -1 to +5. Metallic vanadium does not occur in nature, and the most common valence states are +3, +4, and +5. The pentavalent form (VO3-) predominates in extracellular body fluids whereas the
Vanadium metabolism in sheep. I. Comparative and acute toxicity of vanadium compounds in sheep.
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Twelve Florida native wethers were given ammonium metavandate, calcium orthovanadate and calcium pyrovanadate by capsule in a study to examine the toxicity of the compounds. The initial daily dosage of 100 mg elemental vanadium was increased by 50 mg at 2-d intervals for an assessment not only of
Comparative pulmonary toxicological assessment of oil combustion particles following inhalation or instillation exposure.
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Controversy persists regarding the validity of intratracheal instillation (IT) of particulate matter (PM) as a surrogate for inhalation exposure (IH) in rodents. Concerns center on dose, dose-rate, and distribution of material within the lung. Acute toxicity of a residual oil fly ash (ROFA)
Acute lung injury from intratracheal exposure to fugitive residual oil fly ash and its constituent metals in normo- and spontaneously hypertensive rats.
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We have recently shown that the spontaneously hypertensive (SH) rats with underlying cardiovascular disease exhibited greater pulmonary vascular leakage and oxidative stress than healthy normotensive (Wistar Kyoto, WKY) rats after a 3-day inhalation exposure to residual oil fly ash (ROFA) particles
Osseointegration of rough acid-etched titanium implants: 5-year follow-up of 100 minimatic implants.
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During 1992, 100 Minimatic screw implants made of titanium alloy (titanium-aluminum-vanadium) with a machined rough acid-etched surface were placed in 63 consecutive partially edentulous patients. At second-stage surgery, which was performed after a 4- to 6-month healing period, none of the implants
Acute toxicity of ammonium metavanadate in mice.
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Acute toxicity of ammonium metavanadate solutions in normal saline (pH 6.7) or 0.1 M Tris-HCl-NaCl buffers (pH 7.2 or pH 7.8) was studied in BALB/c mice at 20 mg V/kg. Animals receiving these solutions subcutaneously started to show severe clinical signs 10-15 min postinjection and high mortality
Time and dose-response study of the effects of vanadate on rats: morphological and biochemical changes in organs.
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Vanadate at a dosage level of 0.9 mg V/kg per day produced acute toxic signs in rats when injected subcutaneously for 16 days. These signs were weakness, loss of appetite, dehydration, significant reduction in body weight, nose bleeding, and death. The pathological and biochemical changes were most
The threshold for brain damage in rabbits induced by bursts of ultrasound in the presence of an ultrasound contrast agent (Optison).
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The purpose of this study was to test the hypothesis that burst ultrasound (US) in the presence of a US contrast agent using parameters similar to those used in brain blood flow measurements causes tissue damage. The brains of 10 rabbits were sonicated in 3-8 locations with 1.5-MHz, 10- micro s
The metal and metalloprotein profile of human plasma as biomarkers for stroke diagnosis.
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Stroke, a major cause of disability and mortality, affects someone in the United States every 40s. Stroke biomarkers, including those that could be used as a blood test for diagnosis of stroke, have been particularly elusive. We performed a double blind study to identify human plasma biomarkers for
Serum trace elements are associated with hemostasis, lipid spectrum and inflammatory markers in men suffering from acute ischemic stroke.
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The primary objective of the study is investigation of the association between trace elements status and hemostasis, lipid spectrum and inflammatory markers in acute ischemic stroke (AIS). A total of 30 men suffering from AIS and 30 healthy controls were involved in the current survey. Blood count,
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