Influence of Nano Nutrients on Heterocyst-Forming Cyanobacterium Anabaena ambigua Rao

New insights into the effect of nitrogen incorporation in Mo: catalytic hydrogenation vs. hydrogenolysis

The incorporation of nitrogen into bulk Mo has a contrasting effect on hydrogenation (nitrobenzene) and hydrogenolysis (benzaldehyde) processes.

Facile and novel synthetic method to prepare nano molybdenum and its catalytic activity

This study reports on a facile and economical synthetic method to prepare nano molybdenum by solid-state reaction technique. Metallic nano molybdenum was synthesised from molybdenum trioxide, molybdenum IV oxide and molybdenum VI oxide through thermal decomposition technique. Metallic nano molybdenum prepared from molybdenum IV oxide was used to study the catalytic effect of molybdenum nanoparticles on the growth of Anabaena sp. The increase in concentration of nano molybdenum from 0.1 to 100% in BG11 (N⁻ Mo⁻ + nano Mo) medium increases heterocyst frequency. The chlorophyll and protein content in Anabaena sp. was found to improve when compared with bulk molybdenum particles and showed a positive influence to be used as a nano nutrient for Anabaena sp.

Structural, compositional and textural properties of monoclinic α-Bi₂O₃ nanocrystals

Perfect α-Bi2O3 nanocrystals were successfully synthesized via green synthesis method. X-ray diffraction studies clearly revealed a single phase α-Bi2O3 nanocrystal without any secondary phase. The strong XPS peaks observed at 160 and 165 eV were assigned to Bi4f5/2 and Bi4f7/2 and clearly revealed Bi(3+) valence states of bismuth ions. Photoluminescence spectra revealed the perfect α-Bi2O3 crystal nature without having inter band transitions between defects, impurity and different valence states of bismuth ions. Out of thirty expected modes, the symmetry assignments of Raman bands correlated to Bg(4), Ag(5), Bg(5), Bg(6), Ag(7), Ag(8), Ag(9), Ag(10), Ag(12) and Ag(14) modes revealed perfect α-Bi2O3 nanocrystals. Transmission electron microscopy studies combined with a selected area electron diffraction pattern recorded on α-Bi2O3 nanocrystals show monoclinic structure preferential orientation with sizes approximately 200 nm in diameters and 500 nm in length.

Rambutan peels promoted biomimetic synthesis of bioinspired zinc oxide nanochains for biomedical applications

A naturally occurring rambutan peel waste was employed to synthesis bioinspired zinc oxide nanochains. Rambutan peels has the ability of ligating zinc ions as a natural ligation agent resulting in zinc oxide nanochains formation due to its extended polyphenolic system over incubation period. Successful formation of zinc oxide nanochains was confirmed employing transmission electron microscopy studies. About 60% and ∼40% cell viability was lost and 50% and 10% morphological change was observed in 7 and 4 days incubated ZnO treated cells compared with control. Moreover, 50% and 55% of cell death was observed at 24 and 48 h incubation with 7 days treated ZnO cells and hence alters and disturbs the growth of cancer cells and could be used for liver cancer cell treatment.

Green Synthesis of Spinel Magnetite Iron Oxide Nanoparticles

Spinel magnetite Fe3O4nanoparticles were synthesized using rambutan peel waste extract as a green ligation and chelating agent. The green synthesized nanoparticles were characterized employing X-ray diffraction (XRD), Raman spectroscopy, FTIR spectroscopy and transmission electron microscopy (TEM) studies. The XRD study revealed spinel phase hda a magnetite structure. The formation of iron oxide nanoparticles using rambutan extract was confirmed employing IR studies. XRD, FTIR and Raman spectrum analyses all supports the synthesis of Fe3O4nanoparticles. The TEM revealed the spinel morphology of the biosynthesized nanoparticles with 200 nm.

Green Synthesis of Zinc Oxide Nanoparticles

Nephelium lappaceum L. peels was effectively used for the synthesis of zinc oxide nanoparticles as a natural ligation agent. The role of rambutan extrac on the formation of zinc oxide nanoparticles was confirmed employing HPLC and GC-MS studies. The XRD and TEM revealed the crystallinity and spherical morphology of the biosynthesized nanoparticles. The size of the particles was found to be 20 nm as deduced from XRD and TEM analysis.

Green Synthesis of Magnesium Oxide Nanoparticles

Nephelium lappaceum L. peels was effectively used for the synthesis of magnesium oxide nanoparticles as a natural ligation agent. The XRD and SEM revealed the crystallinity and spherical morphology of the biosynthesized nanoparticles. The size of the particles was found to be 60-70 nm as deduced from XRD and SEM analysis. The particle size of as-synthesized magnesium oxide powders measured by PSA was approximately 100 nm. The successful formation of magnesium oxide nanoparticles was confirmed employing XRD, SEM-EDX and PSA analysis.