Hydrogen is becoming important clean energy while zerovalent iron (ZVI) and ferroferric oxide are of great interest to many applications including environmental remediation chemical catalysis. Here, we report production hydrogen, octahedron by etching Al–Fe alloys using NaOH solutions. The rate hydrogen generation increased with increasing concentration the alloy's particle size decreasing Fe c...

the silver spr chip was modified by alkaline-silane condensation with aminopropyltriethoxysilane (aptes) in naoh aqueous solution at different times. silver sputtered slides coated with aptes were immersed in naoh solution, enabling us to produce silver surfaces homogeneously covered with aptes. the surface properties of grafted aptes on sputtered silver surface as a occasion of time were studi...

We here show that the electronic properties and the chemical reactivities of the internucleotidic phosphates in the heptameric ssRNAs are dissimilar in a sequence-specific manner because of their non-identical microenvironments, in contrast with the corresponding isosequential ssDNAs. This has been evidenced by monitoring the delta H8(G) shifts upon pH-dependent ionization (pK(a1)) of the centr...

The demand for ethanol in Brazil is growing. However, although the country one of largest producers this fuel, it still necessary to diversify production matrix. In that regard, studies with different raw materials are needed, mainly use low cost and high available wastes such as lignocellulosic residues from agriculture. Therefore, study aimed analyze bioethanol corn stover. An alkaline pretre...

Cellulose nanofibrils were efficiently produced from eucalyptus fibers using a combined NaOH and enzymatic treatment followed by pilot scale grinding process. The structural changes of assessed after treatments at 5, 10 15 wt% concentrations. A progressive shift cellulose I to II crystalline structure was observed with X-ray diffraction (XRD) nuclear magnetic resonance (NMR). further hydrolysis...

alkaline hydrolysis of ethyl acetate is essentially an irreversible and second order reaction. industrial importance of the reaction product, sodium acetate, necessitate for process improvement in terms of maximum conversion and economical usage of raw materials. statistical design of experiments was utilized to enhance conversion in both batch and plug flow reactors.a full two level factorial ...

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