A previously published hydrothermal brine-river water mixing model driven by ocean crust production suggests that the molar Mg/Ca ratio of seawater (mMg/Ca(sw)) has varied significantly (approximately 1.0-5.2) over Precambrian time, resulting in six intervals of aragonite-favouring seas (mMg/Ca(sw) > 2) and five intervals of calcite-favouring seas (mMg/Ca(sw) < 2) since the Late Archaean. To ev...

Licorice (Glycyrrhiza glabra L.) is a medicinal plant species valued in many countries Asia and Europe for its phytochemical characteristics. biodiversity becoming threatened nowadays Iran due to increasing demand drastic decline of natural habitats. Therefore, licorice domestication would be necessary the near future, molecular breeding help introduce genotypes suitable cultivation. The presen...

We report the first laboratory and interstellar detection of alpha-cyano vinyl radical (H2CCCN). This species was produced in by an electric discharge a gas mixture cyanide, CH2CHCN, Ne, its rotational spectrum characterized using Balle-Flygare narrowband-type Fourier-transform microwave spectrometer operating frequency region 8-40 GHz. The observed shows complex structure due to tunneling spli...

The different algorithms appropriate for point source photometry on data from the SPIRE instrument on-board the Herschel Space Observatory, within the Herschel Interactive Processing Environment (HIPE) are compared. Point source photometry of a large ensemble of standard calibration stars and dark sky observations is carried out using the 4 major methods within HIPE: SUSSEXtractor, DAOphot, the...

Calcium carbonate aragonite polymorph nanoparticles derived from cockle shells were prepared using surface functionalization method followed by purification steps. Size, morphology, and surface properties of the nanoparticles were characterized using transmission electron microscopy, field emission scanning electron microscopy, dynamic light scattering, zetasizer, X-ray powder diffraction, and ...

Using the observed submillimetre source counts, from 250 to 1200μm [including the most recent 250, 350 and 500μm counts from Balloon-borne Large-Aperture Submillimetre Telescope (BLAST)], we present a model capable of reproducing these results, which is used as a basis to make predictions for upcoming surveys with the Spectral and Photometric Imaging Receive (SPIRE) instrument aboard the Hersch...

The polymorphic forms and amorphous form of TA-270 (4-hydroxy-1-methyl-3-octyloxy-7-sinapinoylamino-2(1H)-quinolinone), a newly developed antiallergenic compound, were characterized by powder X-ray diffractometry, thermal analysis, infrared spectroscopy and solid state 13C-NMR. The intrinsic dissolution rates of polymorphic forms were measured using the rotating disk method at 37 degrees C. The...

We report herein a theoretical study of the high-pressure compressibility Cd3V2O8, Zn3V2O8, Mg3V2O8, and Ni3V2O8. For we also present its structural stability. Computer simulations were performed by means first-principles methods using CRYSTAL program. In found previously unreported polymorph which is thermodynamically more stable than already known polymorph. determined all compounds evaluated...

The title compound, C(15)H(14)O(3), has been found to crystallize as a new triclinic polymorph. The asymmetric unit of the present structure, as in the previously reported monoclinic structure [Norment & Karle (1962 ▶). Acta Cryst. 15, 873-878], contains two independent mol-ecules, which differ slightly in the orientations of the two benzene rings. The crystal packing of the triclinic polymorph...

The structural, elastic, and electronic properties of the high-pressure FeTiO3 polymorphs and their relative phase stability under pressure are investigated using hybrid exchange density functional theory. For the currently known phases the computed structural and elastic parameters are in good agreement with those observed, as is the predicted stability of the phases. The transformation of the...