1. The hypoglycaemic compound diphenyleneiodonium causes rapid and extensive swelling of rat liver mitochondria suspended in 150mm-NH(4)Cl, and in 150mm-KCl in the presence of 2,4-dinitrophenol and valinomycin. This indicates that diphenyleneiodonium catalyses a compulsory exchange of OH(-) for Cl(-) across the mitochondrial inner membrane. Br(-) and SCN(-) were the only other anions found whos...

Respiration-linked contraction of corn mitochondria is not noticeably reduced by low, uncoupling concentrations of dinitrophenol. However, if a contraction/respiration ratio is calculated, the contraction proves to be uncoupled. Previous statements that contraction cannot be uncoupled from respiration are in error.The uncoupling of contraction is consistent with the concept that dinitrophenol a...

Abstract In this study, the removal of bisphenol A (BPA), 2,4-dinitrophenol (2,4-DNP), and 2,4-dichlorophenol (2,4-DCP) using a new magnetic adsorbent methacrylic acid-functionalized β-cyclodextrin (Fe 3 O 4 @MAA-βCD) was evaluated. The materials were characterized by Fourier transform infrared spectroscopy, scanning electron microscope, transmission microscopy, X-ray diffraction. batch adsorpt...

It has been known for years that the phenolic compounds are able to exert harmful effects toward living organisms including humans due their high toxicity. Living were exposed these as they released into environment waste products from several fast-growing industries. In this regard, tremendous efforts have made by researchers develop sensing methods detection of compounds. Graphene and conduct...

The uncoupler 2,4-dinitrophenol blocks the final step of lipopolysaccharide assembly--transfer of O antigen from undecaprenyl pyrophosphate to core lipopolysaccharide--in intact Salmonella typhimurium but not in isolated membrane fractions. The O-antigen ligase enzyme is not inhibited by dinitrophenol in vitro, and core lipopolysaccharide synthesized in the presence of uncoupler in vivo is func...

WSA2 from mycobacteria have recently been shown to have potent biological activity ( I , 2, 5). These adjuvants are nontoxic in vitro and may prove useful in amplification of the immune response. Adam et a!. ( 1) reported that water-soluble fractions that were extracted from the myco bacterial cell walls were nontoxic and were capable of increasing circulating antibodies and of inducing delayed...

The ion permeability of the membrane junctions between Chironomus salivary gland cells is strongly depressed by treatments that are generally known to inhibit energy metabolism. These treatments include prolonged cooling at 6 degrees -8 degrees C, and exposure to dinitrophenol, cyanide, oligomycin, and N-ethylmaleimide. Intracellular injection of ATP appears to prevent depression of junctional ...

The reaction of nitrophenols (picric acid, 2,6-dinitrophenol, and 2,4-dinitrophenol) with divalent metal oxinate (metal = Cu, Co, Ni, Mn, and Zn) produced a type of molecular complex, which comprises two molecules of the metal oxinate and one molecule of the nitrophenol. In the case of the Mg complex the ratio is 1:1. A definite charge-transfer band is detected for the Co(II) complex. A hydroge...