BACKGROUND We report a case of a spray painter who developed malignant fibrous histiocytoma (MFH) of the maxillary sinus following long-term exposure to chromium, nickel, and formaldehyde, implying that these agents are probable causal agents of MFH. CASE REPORT The patient developed right-sided prosopalgia that began twenty months ago. The symptom persisted despite medical treatment. After t...

Chromium (Cr) has been studied since the end of the 19th century, when carcinogenic effects of hexavalent Cr were discovered. Essentiality of trivalent Cr was demonstrated in 1959; Cr3+ has been studied in humans and laboratory animals since the 1970s and it is only since the 1990s that Cr has been studied as an essential element in livestock animals with the same intensity. Trivalent chromium ...

Hexavalent chromium (Cr(VI)), a commonly used industrial metal, is a well known human lung carcinogen. Epidemiology and animal studies suggest that the particulate Cr(VI) compounds, specifically the water insoluble compounds, are the more potent carcinogens; however, the carcinogenic mechanism remains unknown. Here we summarize recent Cr(VI)-induced human tumour, in vivo, cell culture and in vi...

Benzylidene aniline is one of the important aromatic compounds for an additional stain which used in various immuno assays. Benzimidazolium fluorochromate (BIFC) chromium (VI) compounds, as a mild oxidising agent. This study aims to describe synthesis and determination antimicrobial activity bezylidene BIFC. IR UV spectral data were confirm structure activities characterised by nature biologica...

Although phase-transfer-catalyzed asymmetric S(N)Ar reactions provide unique contribution to the catalytic asymmetric α-arylations of carbonyl compounds to produce biologically active α-aryl carbonyl compounds, the electrophiles were limited to arenes bearing strong electron-withdrawing groups, such as a nitro group. To overcome this limitation, we examined the asymmetric S(N)Ar reactions of α-...

Lawrence Berkeley Lab scientists have discovered a bacteria that thrives on toxic waste. A Fourier-transform infrared (FTIR) spectromicroscopy beamline (Beamline 1.4.3) was implemented to identify the toxin-devouring microbes. The bacteria detected converts hexavalent chromium (Cr 6+) a widespread industrial contaminant, into a safer, stable compound (Cr 3+). " Basically, the bugs eat the waste...

Sorption data were obtained with a Matawan soil and the following chromium (III) organic complexes: chromium (III) ascorbate, chromium (III) glutamate, chromium (III) histidine, chromium (III) mandelate, chromium (III) citrate, chromium (III) cysteine, chromium (III) serine, chromium (III) pyruvate and chromium (III) oxalate. The influence of pH (2-12), ionic strength (0.005-1 M) and concentrat...