Sampling and analysis provide the data for all geochemical interpretation and thus it is imperative that these tasks be performed by trained personnel with insight into possible errors. Different types of containers (glass, or plastic, amber or transparent) and different pre-treatment (filtering, freezing, addition of chemicals) is needed for the various constituents determined. Some constituen...

A general theoretical description of dual-beam photothermallensing spectroscopy is given. The results are valid for most general conditions, that is, for flowing as well as stationary media, for optically thick as well as optically thin media, and also for any transverse modes of incident pump beams

In the present study, gold/surfactant core/shell colloidal nanoparticles with a controlled morphology and chemical composition have been obtained via the so-called sacrificial anode technique, carried out in galvanostatic mode. As synthesized Au-NPs had an average core diameter comprised between 4 and 8 nm, as a function of the electrochemical process experimental conditions. The UVVis characte...

Camphorquinone (CQ) derivatives having acylphosphine oxide (APO) group are unknown. This study synthesized such a novel 7,7dimethyl-2,3-dioxobicyclo[2.2.1]heptane-1-carbonyldiphenyl phosphine oxide (DOHC-DPPO = CQ-APO). Ultraviolet and visible (UVVIS) spectra of CQ-APO, CQ, and APO were measured. Photopolymerization performances of experimental light-cured resins comprising these photoinitiator...

Nuclei of hemlock (Tsuga canadensis and Tsuga canadensis var. nana) were investigated for the presence of flavanols. Histochemical staining with pdimethylaminocinnamaldehyde proved to be a highly valuable method yielding a bright blue flavanol coloration for nuclei. There was a significant variation in flavanol deposition (1) among nuclei, (2) at the subnuclear level and also (3) along the chro...

sepiolite deposits have been recently discovered in northeastern iran. however, there is still little information about its physicochemical and mineralogical characteristics. therefore, the collapse of the sepiolite (with sizes of < 63 μm) structure induced by temperature elevation in an electric furnace at 350, 550, and 850 °c for 4 hours was studied using x-ray diffraction (xrd) in combinatio...

several novel mononuclear zn(ii) complexes, [zn(bpy)l2], where bpy=2,2’-bipyridine and l=monoanions of phenylcyanamide (pcyd), 4-methylphenylcyanamide (4-mepcyd), 3,5-dimethylphenylcyanamide(3,5-me2pcyd),4-methoxyphenylcyanamide(4-meopcyd), 3,5-dimeth-oxyphenylcyanamide (3,5-meo2pcyd), 3-chlorophenylcyanamide (3-clpcyd), 2,3-dichlorophenyl-cyanamide (2,3-cl2pcyd), 4-bromophenylcyanamide (4-brpc...

conclusions the expression of recombinant calprotectin, as an effective protein, can help in diagnosis or treatment of inflammatory and cancer processes in the future. furthermore, ca2+ induced a partial change in secondary and tertiary structure of calprotectin subunits and this change is probably necessary for protein dimerization. results interaction of s100a8 and s100a9 in the presence of c...

conclusion distinct neurochemical and histological structure changes (cortico-striatal-thalamic-cortical cycle) exist in patients with first-episode ocd. 1h-mrs is capable of identifying these changes by assessing metabolic abnormalities. objectives this study aims to use magnetic resonance spectroscopy (mrs) to discover substance-metabolism abnormalities of brain circuits in patients with firs...

background epilepsy, a well-known mostly idiopathic neurologic disorder, has to be correctly diagnosed and properly treated. up to now, several diagnostic approaches have been processed to determine the epileptic focus. objectives the aim of this study was to discover whether proton-mr-spectroscopic imaging (mrsi) aids in the diagnosis of temporal lobe epilepsy in conjunction with classical ele...