5 research outputs found
Effects of ethanolic leaf extract of Chrysophyllum albidum G. on biochemical and haematological parameters of albino Wistar rats
The effect of oral administration of the leaf extract of Chrysophyllum albidum G. on biochemical and
haematological parameters were investigated in albino rats for 16 days. The extract did not show any
significant effect (p > 0.05) on the plasma concentrations of total bilirubin, albumin and alkaline
phosphatase (ALP) as well as the packed cell volume (PCV), haemoglobin (Hb), red blood cell (RBC),
reticulocytes, neutrophils, lymphocytes, eosinophils, basophils, mean corpuscular haemoglobin
concentration (MCHC) and mean corpuscular haemoglobin (MCH). The concentration of the platelets
was significantly decreased (p < 0.05) at 1000 mg/kg body weight, while white blood cell (WBC) was
significantly increased at 500 mg/kg body weight. The doses significantly reduced (p < 0.05) plasma
levels of AST, ALT, total protein, glucose and creatinine while urea was significantly increased. While
the extract significantly increased the lung, brain and liver-body weights, the kidney, heart, testis,
spleen and epididymis-body weights were not significantly affected. The result suggests that the leaf
extract of C. albidum contains antiplatelet and hypoglycemic properties and exhibited selective organ
toxicity to the rats
Torque magnetometry studies of metamagnetic transitions in single-crystal HoNi_{2}B_{2}C and ErNi_{2}B_{2}C at T\approx 1.9 K
The metamagnetic transitions in single-crystal rare-earth nickel borocarbide
HoNi_{2}B_{2}C and ErNi_{2}B_{2}C have been studied at 1.9 K with a Quantum
Design torque magnetometer. The critical fields of the transitions depend
crucially on the angle between applied field and the easy axis [110] for
HoNi_2B_2C and [100] for ErNi_2B_2C. Torque measurements have been made while
changing angular direction of the magnetic field (parallel to basal tetragonal
ab-planes) in a wide angular range (more than two quadrants). The results are
used not only to check and refine the angular diagram for metamagnetic
transitions in these compounnds, but also to find new features of the
metamagnetic states. Among new results for the Ho borocarbide are the influence
of a multidomain antiferromagnetic state, and ``frustrated'' behavior of the
magnetic system for field directions close to the hard axis [100]. Torque
measurements of the Er borocarbide clearly show that the sequence of
metamagnetic transitions with increasing field (and the corresponding number of
metamagnetic states) depends on the angular direction of the magnetic field
relative to the easy axis.Comment: 3pages (4 figs. incl.) reported at 50th Magnetism and Magnetic
Materials Conference, San Jose, CA, USA, 200
Torque magnetometry studies of metamagnetic transitions in single-crystal HoNi2B2C and ErNi2B2C at T approximate to 1.9 K
The metamagnetic transitions in single-crystal rare-earth nickel borocarbide HoNi2B2C and ErNi2B2C have been studied at 1.9 K with a Quantum Design torque magnetometer. The critical fields of the transitions depend crucially on the angle between applied field and the easy axis [110] for HoNi2B2C and [100] for ErNi2B2C. Torque measurements have been made while changing angular direction of the magnetic field (parallel to basal tetragonal ab planes) in a wide angular range (more than two quadrants). The results are used not only to check and refine the angular diagram for metamagnetic transitions in these compounds, but also to find new features of the metamagnetic states. Among new results for the Ho borocarbide are the influence of a multidomain antiferromagnetic state, and "frustrated" behavior of the magnetic system for field directions close to the hard axis [100]. Torque measurements of the Er borocarbide clearly show that the sequence of metamagnetic transitions with increasing field (and the corresponding number of metamagnetic states) depends on the angular direction of the magnetic field relative to the easy axis. (C) 2006 American Institute of Physics.This article may be downloaded for personal use only. Any other use requires prior permission of the author and AIP Publishing. This article appeared in Naugle, D. G., K. D. D. Rathnayaka, S. A. Adegbenro, B. I. Belevtsev, P. C. Canfield, and S.-I. Lee. "Torque magnetometry studies of metamagnetic transitions in single-crystal Ho Ni 2 B 2 C and Er Ni 2 B 2 C at T≈ 1.9 K." Journal of applied physics 99, no. 8 (2006): 08F701, and may be found at DOI: 10.1063/1.2159413. Copyright 2006 American Institute of Physics. Posted with permission