Results 21 to 30 of about 332,123 (280)

PETROGRAPHY AND MINERAL CHEMISTRY AT WADI BALLI AREA, CENTRAL EASTERN DESERT, EGYPT [PDF]

open access: yesDelta Journal of Science, 2008
The Gattar granites are composed mainly of quartz and feldspars as essential minerals and biotite hornblende, zircon, apatite and sphene as accessory minerals, some secondary minerals as epidote, chlorite and sericite are found.
Joseph M. Samaan   +3 more
doaj   +1 more source

HF Doppler radar observations of sporadic E at an Indian low latitude station, Visakhapatnam [PDF]

open access: yesAnnales Geophysicae, 2009
5.5 MHz HF Doppler radar observations of Sporadic E over an Indian low latitude station, Visakhapatnam (17.7° N, 83.3° E and Dip 20°) with 10 s resolution showed quasi-periodic variations of the echo strength and Doppler velocity ...
M. S. S. R. K. N. Sarma   +2 more
doaj   +1 more source

Protonation Equilibria of L-Aspartic, Citric and Succinic Acids in Anionic Micellar Media

open access: yesE-Journal of Chemistry, 2009
The impact of sodium lauryl sulphate (SLS) on the protonation equilibria of L-aspartic acid, citric acid and succinic acid has been studied in various concentrations (0.5-2.5% w/v) of SLS solution maintaining an ionic strength of 0.16 mol dm-3 at 303 K ...
P. Srinivasa Rao   +4 more
doaj   +1 more source

Kinetics and Thermodynamics of Uranium Adsorption Using Impregnated Magnetic Graphene Oxide [PDF]

open access: yesIranian Journal of Chemistry & Chemical Engineering, 2020
Magnetic Graphene Oxide(MGO) impregnated Di(2-Ethyl Hexyl)Phosphoric Acid (D2EHPA) (DMGO) was prepared by multi-impregnation. The structures of GO and DMGO were characterized by FT-IR, TGA, EDX, SEM, and XRD.
Mohamed A. Gado   +2 more
doaj   +1 more source

CONVERGENCE OF INTERNATIONAL AUDIT STANDARDS AND AMERICAN AUDIT STANDARDS REGARDING SAMPLING [PDF]

open access: yesAnnals of the University of Oradea: Economic Science, 2013
: Sampling is widely used in market research, scientific analysis, market analysis, opinion polls and not least in the financial statement audit. We wonder what is actually sampling and how did it appear?
Chis Anca Oana, Danescu Tatiana, ,
doaj  

Longitudinal effects of race, ethnicity, and psychosocial disadvantage on systemic inflammation

open access: yesSSM: Population Health, 2019
Objective: Psychosocial factors likely contribute to racial and ethnic inequalities in cardiovascular diseases (CVDs). However, precise social, psychological, and physiological pathways linking race and ethnicity to the development of CVDs are not well ...
Laura B. Zahodne   +4 more
doaj   +1 more source

Simultaneous Estimation of Domperidone and Pantoprazole in Solid Dosage Form by UV Spectrophotometry

open access: yesE-Journal of Chemistry, 2006
Domperidone is an antiemetic and pantoprazole is an antiulcer drug. Simple, precise, rapid and selective simultaneous equation and Q- analysis UV spectrophotometric methods have been developed for the simultaneous determination of domperidone and ...
P. Ravi Kumar   +4 more
doaj   +1 more source

Spatial characteristics of aerosol physical properties over the northeastern parts of peninsular India [PDF]

open access: yesAnnales Geophysicae, 2005
Measurements on aerosol spectral optical depths and near surface mass-size distributions made at several locations in the states of Andhra Pradesh, Orissa and Chattisgarh, constituting the northeastern part of the peninsular India during the ISRO-GBP ...
K. Niranjan   +5 more
doaj   +1 more source

Structural and dielectric studies of Zr and Co co-substituted Ni0.5Zn0.5Fe2O4 using sol-gel auto combustion method

open access: yesResults in Physics, 2018
Zr and Co substituted Ni0.5Zn0.5 ZrxCuxFe2−2xO4 with x values varies from the 0.0 to 0.4 in steps of 0.08 wt% ferrites synthesized by using sol-gel auto combustion method. The XRD patterns give evidence for formation of the single phase cubic spinel. The
K. Jalaiah   +3 more
doaj   +1 more source

Characteristics of VHF radiowave scintillations over a solar cycle (1983−1993) at a low-latitude station: Waltair (17.7°N, 83.3°E) [PDF]

open access: yesAnnales Geophysicae, 1997
The characteristics of VHF radiowave scintillations at 244 MHz (FLEETSAT) during a complete solar cycle (1983–93) at a low-latitude station, Waltair (17.7°N, 83.3°E), are presented.
P. V. S. Rama Rao   +5 more
doaj   +1 more source

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