Background: Malaria is a worldwide threat, which affects millions of people. Although several antimalarial has been reported, they are either not effective or toxic. This study evaluated the antimalarial efficacy and safety of stem bark aqueous extracts of Khaya grandifoliola (KG) and Enantia chlorantha (EC) in Plasmodium berghie (NK65S) infected Swiss mice. Methods: Forty-two animals were gro...

BACKGROUND: The purpose of this study was to evaluate the sensitometric characteristics of Ultraspeed, Ektaspeed Plus and Insight dental radiographic films using manual and automatic processing systems. METHODS: In this experimental invitro study, an aluminum step-wedge was used to construct characteristic curves for D-, E- and F-speed radiographic films (Kodak Eastman, Rochester, USA). All fil...

We report precision measurements of the nuclear magnetic moment \textsuperscript{43}Ca\textsuperscript{+}, made by microwave spectroscopy 4s $^2$S$_{1/2}$ $\left|F=4, M=0\right\rangle \rightarrow \left|F=3, M=1\right\rangle$ ground level hyperfine clock transition at a field $\approx$ 146 G, using single laser-cooled ion in Paul trap. measure frequency $f = 3199941076.920 \pm 0.046$ Hz, from wh...

A NiO-MgO layered, binary thin oxide film has been prepared on a Mo(100) surface and characterized byAuger electron spectroscopy (AES), low energy electron diffraction (LEED) and high-resolution electron energy loss spectroscopy (HREELS or EELS). NiO grows epitaxially on a 20-monolayer (ML) MgO(100) film supported on the Mo(100) surface. At a NiO coverage of <1.8 monolayer, a new surface or int...

Cilleruelo a conjecturé que si f??[x] de degré d?2 est irréductible sur les rationnels, alors loglcm(f(1),...,f(N))?(d-1)NlogN quand N??. Il l’a prouvé dans le cas d=2. Très récemment, Maynard et Rudnick ont qu’il existe c d >0 tel loglcm(f(1),...,f(N))?c NlogN, montré qu’on peut prendre =d-1 2 . Nous donnons une preuve alternative ce résultat avec la constante améliorée =1. De plus, nous prouv...

Abstract Calcium Oxide (CaO) nanoparticles have been synthesized from waste eggshells (ES) as a source of calcium by solution combustion technique using muffle furnace and microwave oven. CaO obtained (CaO-F) via oven (CaO-M) were characterized X-ray diffraction, scanning electron microscopy, energy dispersive spectroscopy, AC conductivity dielectric studies to correlate the physico-chemical be...

Some novel Schiff bases have been prepared by reacting 6-azido-5-formyl-2-pyridone 1 with a series of aromatic amines 2a-f. 5-Arylaminomethylene-6-(E)-aryl-iminopyridones 3a-e were obtained by reaction of 1 with 2a-e at room temperature, whereas with 2f, the 6-azido-5-naphthalen-2-yl-iminomethylpyridone derivative 4 was formed. On the other hand, heating 1 with 2a-d at 140-150 degrees C yielded...

Six new complexes [Cd(tpy)(pfb)2] (1, tpy = 2,2?:6?,2?-terpyridine), [Ln2Cd2(tpy)2(pfb)10] (Ln Eu (2Eu), Tb (2Tb)), [Ln2Cd2(tbtpy)2(pfb)10]·2MeCN (3Eu), (3Tb), tbtpy 4,4?,4?-tri-tert-butyl-2,2?:6?,2?-terpyridine), [Eu2Cd2(tppz)(pfb)10]n (4, tppz 2,3,5,6-tetra-(pyridin-2-yl)pyrazine) based on pentafluorobenzoic acid (Hpfb) have been prepared and investigated. The effect of tridentate ligands geo...

Diamond-like carbon (DLC) films with different structure were deposited on highly electrically conductive silicon substrates (SiO ySi), using d.c. magnetron sputtering deposition process. Their structure and electrochemical behavior in a 0.5 M H SO 2 2 4 solution were studied with micro-Raman spectroscopy, electrochemical impedance spectroscopic analysis and film impedance spectroscopy. The com...