Nanoscale zero-valent iron NZVI particles were synthesized by the aqueous phase borohydride reduction method, and the synthesized NZVI particles were used for the degradation of Basic Yellow 28 BY28 dye in aqueous solution. The influence of experimental variables such as reaction time, NZVI particle dosage and pH were studied on the decolorization of BY28. Mixing an aqueous solution of 100 mg L...

A nano-hybrid based on polystyrene derivatives and magnetite was introduced as a new sorbent for pretreatment and determine the trace amount of malachite green from aqueous solution by spectrophotometry after preconcentration by solid phase extraction (SPE). UV–Vis spectrophotometer was used for determination of MG concentration after desorption of the dye by hydrochloric acid solution in the s...

The optical energy gap of anthocyanin compounds from sea lettuce extract (Ulva lactuca L.) has been calculated using the Tauc plot method. Sea plants taken at Sanur Beach Bali. was dried then mashed and extracted for 24 hours, last being macerated through three cycles. extraction results are evaporated to obtain a thick solution. Extracted evaporated-extraction samples were characterized by UV-...

Treatment of cell smears, paraffin, and Epon tissue sections with aqueous solutions of curcumin results in a green fluorescence reaction in chromatin under violet-blue excitation which is abolished after extraction procedures with DNase and TCA. The selective fluorescence characteristics of curcumin support the possibility of employing this dye as a new fluorochrome.

A simple, accurate and fast vortex-assisted dispersive liquid-liquid microextraction procedure has been developed for the extractive spectrophotometric determination of niflumic acid in biological samples. The method is based on the formation of an ion association complex between niflumic acid and methylene blue. The resulting ion-pair was extracted into dichloromethane and its absorbance was m...

A new rapid (less than 6h from insect-to-results) high-throughput assay that is sensitive and specific for detecting BTV RNA in Culicoides biting midges is reported. Homogenization and extraction of nucleic acids from individual Culicoides specimens were performed in a 96-well plate format using specialized beads in a homogenization buffer compatible with cell culture and RNA extraction. A port...

Hydroxylamine (HA)1 and nitrite recycle through the hydrosphere as a result of microbial processes [1–3]. These compounds are important intermediates in the biological nitrogen cycle and are present in soils and surface waters [4,5]. The important role of nitrite in producing N-nitrosamines, some of which have been shown to be carcinogens in the human body, is well established. Nitrite is also ...