Adequate biogeochemical characterization and monitoring of aquatic ecosystems, both for scientific purposes and for water management, pose high demands on spatial and temporal replication of chemical analyses. Near-infrared reflectance spectroscopy (NIRS) may offer a rapid, low-cost and reproducible alternative to standard analytical sample processing (digestion or extraction) and measuring tec...

This study investigates the formation of a chromate conversion coating at Al-Cu-Fe-Mn intermetallic sites of an Al2219 alloy and the corrosion initiation at these sites in a 3.5 % NaCl solution, using SEM, AES and EDX. Changes in the surface chemistry were monitored after progressive exposures to the solution up to 42 hours. The coating was found to be thinner and more defective on the intermet...

Previous papers by Gram and Norgaard (1) and Gram (2) and also by Atchley, Loeb, Benedict and Palmer (3) have shown in both normal and most pathological human sera a marked constancy in the ratio of NaCl concentration to the NaCl equivalent of conductivity. This [NaI is expressed as the ratio aCi] A recent study by Pepper (4) NaCi eq. has shown that in nephritis the relative proportion of non-c...

PURPOSE MicroRNAs are small noncoding RNAs and microRNA-214 (miR-214) has been associated with the inhibition of cancer cell growth, migration, and invasion. The aim of this study was to investigate whether cell-free miR-214 isolated from urine could be used as a biomarker for non-muscle-invasive bladder cancer (NMIBC). MATERIALS AND METHODS A total of 138 patients with primary NMIBC and 144 ...

It has beed showed that perivascular adipose tissue (PVAT) of human internal thoracic artery (ITA) releases adventitia/adipocyte-derived relaxing factor (ADRF). The precise mechanism of vasodilatatory effect of ADRF is still unknown. It was suggested that various potassium channels may be involved in the action of ADRF. The aim of this study was to assess the involvment of potassium channels in...

The cathodic delamination and wear resistance of epoxy powder coatings were evaluated after adding 3 % (by wt.) calcium ion exchanged micropigments from amorphous synthetic silica. materials manufactured through the innovative economical hot mixing method, three different considered: commercial epoxy, without submitted to treatment, with micropigments. curing kinetics was studied in order evalu...

We present a theory of the anomalous Hall effect in ferromagnetic (III, Mn)V semiconductors. Our theory relates the anomalous Hall conductance of a homogeneous ferromagnet to the Berry phase acquired by a quasiparticle wave function upon traversing closed paths on the spin-split Fermi surface. The quantitative agreement between our theory and experimental data in both (In, Mn)As and (Ga, Mn)As ...

Microbial flooding is a new enhanced-oil-recovery technology for the petroleum industry. In this study, strain of Bacillus subtilis named SL-2 was isolated from oil-well-produced fluid. B. produces lipopeptide surfactin. The fermentation broth contains biosurfactants (1.2 g/L) with good surface and interfacial activities. Adding 7% to water reduces its tension 72 33.9 mN/m between hexadecane 40...