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Pharmaceutical Applications of Major Marine Nutraceuticals
Published in Se-Kwon Kim, Marine Biochemistry, 2023
P Madan Kumar, R Janani, S Priya, J Naveen, V Baskaran
Bromophenols can be isolated from many marine algae, including the red algae Rhodomela larix (Katsui et al., 1967). Bromophenols have been reported to possess a variety of biological activities, including antioxidant, antimicrobial, antidiabetic, anticancer and antithrombotic effects. Duan et al. (2007) showed the antioxidant effect of bromophenols isolated from Symphyocladia latiuscula by free radical scavenging assay. In a study conducted with eight strains of gram-positive and gram-negative bacteria, bromophenol derivatives from Rhodomela confervoides exhibited antibacterial activity (Xu et al., 2003). Bromophenols extracted from the Leathesia nana exhibited a cytotoxic effect against human cancer cell lines (Shi et al., 2009). A series of studies from Guo et al. demonstrated the anticancer effect of bromophenol derivatives (BOS-93 and BOS-102) in human lung cancer cells. In this study, applying a bromophenol- derivative treatment to A549 cells inhibited cell proliferation and induced G0/G1 phase arrest and apoptosis (Guo et al., 2018; Guo et al., 2019).
Determination of Metals in Soils
Published in T. R. Crompton, Determination of Metals and Anions in Soils, Sediments and Sludges, 2020
The pH range of bromophenol blue is 3.0–4.6 and its acidic and basic forms are yellow and blue, respectively. Fig. 2.14 shows the absorption spectra of the acidic and basic forms of bromophenol blue measured against water over the 420–660nm range. The absorption spectrum of the basic form has a maximum at 580nm, whereas the absorption of the acidic form is almost negligible at this wavelength.
Mononuclear oxidodiperoxido vanadium(V) complex: synthesis, structure, VHPO mimicking oxidative bromination, and potential detection of hydrogen peroxide
Published in Journal of Coordination Chemistry, 2018
Haimanti Adhikari, Kalyan K. Mukherjea
The mechanism of action matches the earlier proposition [20, 40, 42]. The bromide ion (Br−) is oxidized rapidly by the [VO(O2)2N2]- moiety and converted to the bromonium ion (Br+) which exists in reaction medium as Br3+, Br2, or HOBr [43]. Attack of a bromide ion at one of the protonated peroxido atoms and the uptake of a proton from the medium leads to the generation of hypobromous acid (HOBr) followed by restoration of the ion to its native state by the attack of H2O2 on the intermediate [40]. The in situ generated bromonium ion in the form of hypobromous acid attacks the organic substrate (phenol red) to form the corresponding brominated derivative (here bromophenol blue). We compared the catalytic activity and kinetic data of some complexes reported previously (Table 3). It is found that peroxidovanadium complexes show higher catalytic activity than those of oxidovanadium complexes such as 2 and 3 [24], probably because of its built-in peroxido moiety [44]. Therefore, it maybe considered that the catalytic activity of the complexes may have a connection with their structural motifs.