The titration of methanobactin with Cu(II) was monitored by both UV/Vis and NMR spectroscopy and indicates that the major transitions occurring when Cu(II) interacts with methanobactin involve a two-step process that is complete by about 0.6 Cu:mb. This suggests that a 2:1 complex is formed between methanobactin and copper at low copper levels. If this complex exists, it would be different than...

The detection and assay of vitamin B-2 (riboflavin) was accomplished under aqueous conditions using sodium borate buffering at pH 7.52 conditions. The absorbance spectrum of riboflavin was determined at different pH values utilizing several buffers. The buffer at pH at 7.52 is followed by accurate and sensitive assay of riboflavin by spectrophotometer at 440 nm wavelength. Where indicated an or...

This study was performed to determine whether extracellular silver nanoparticles (AgNPs) production is a genus-wide phenotype associated with all the members of genus Morganella, or only Morganella morganii RP-42 isolate is able to synthesize extracellular Ag nanoparticles. To undertake this study, all the available Morganella isolates were exposed to Ag+ ions, and the obtained nanoproducts wer...

The focus of the study is to compare the antibacterial efficacy of silver nanoparticles (AgNPs) fabricated by exploiting biological (a mangrove plant, Rhizophora apiculata) and chemical means (Glucose). The synthesized nanoparticles were characterised using UV-visible absorption spectrophotometry (UV-vis), Fourier transform Infra-red Spectroscopy (FTIR) and Transmission electron microscopy (TEM...

In this study, Au:TiO2 nanoparticles (NPs) are prepared by using the laser ablation method in liquid at different energies (600, 800, and1000 mJ). After that, Au: TiO2 NPs were deposited on porous-Si(PS). Porous silicon (PS) is synthesized photo-electrochemical etching (PECE) of n-type crystalline Si (c-Si) wafers (100) orientation. The intensity current density was (4, 12, and 20 mA/cm2), with...

Silver nanoparticle (AgNP) has been synthesized using adrenaline. Adrenaline readily undergoes an autoxidation reaction in an alkaline medium with the dissolved oxygen to form adrenochrome, thus behaving as a mild reducing agent for the dissolved oxygen. This reducing behavior of adrenaline when employed to reduce Ag(+) ions yielded a large enhancement in the intensity of absorbance in the visi...

Abstract Since the 2017 REACH restrictions on hexavalent chromium, aeronautics industries have been seeking substitute processes for chromium plating. So far, use of trivalent chromium-based precursors seems to be best solution in terms process adaptation. The development such requires a better understanding plating bath chemistry. More specifically, there is need characterize complexation mech...

Borax is a chemical compound that contains the element Boron (B). The purpose of this study to determine whether meatballs circulating in various markets Indonesia contain borax, what levels, and how compare results analysis with methods based on literature study. design research use method which done by studying journals about tracing borax using methods. quantitative test used alkalimetric ti...