The Ullmann reaction of β-tetrahydrodesoxycodeine and the successive sodium—liquid ammonia reduction gave (−)-3-methoxy-N-methylisomorphinan in excellent yield. Similar reduction of the ketal of β-dihydrothebainone phenyl ether followed by the hydrolysis gave the desired (−)-3-methoxy-6-oxo-N...

Ketalization of 7-oxo-dihydrothebainone (the antipode of sinomeninone) gave 6,6; 7,7-diethylenedioxy and 6,7; 6,7-diethylenedioxy derivatives depending on the amount of toluene-p-sulphonic acid. Ullmann reaction of these ketal derivatives and sodium-liquid ammonia reduction followed by hydrolysi...

When N-phenylmethacrylamide (NPMAm) was photopolymerized at room temperature in benzene by using di-tert-butyl peroxide as sensitizer, the resulting heterogeneous polymerization mixture was found to contain very stable propagating poly (NPMAm) radical. An e.s.r. study revealed that the living po...

Polymers bearing N-arylamide units in the side-chains were synthesized by the radical polymerization of N-phenylmethacrylamide (PhMA) and its homologues; the photocrosslinking behaviour of the polymers was studied. When the polymers were irradiated with u.v. light, they became insoluble. The sub...

The isocyanate RfCH2NCO (Rf=CF3(C2F5)2C)reacts under strongly acidic conditions to form the salt RfCH2NH3(+)HSO4(−)(1) which yields, on treatment with sodium nitrite the diazaoalkane RfCHN2 (3). Dissolution of (1) in D.M.S.O. gives, by a remarkable decomposition reaction, the alkane RfH (2). Rea...

Isocyanates and di-isocyanates are used in the production of various chemicals and materials, such as pesticides and polyurethane. However, since the disastrous accidental release of isocyanate in Bhopal in 1984 this class of toxic compounds has been under scrutiny, with growing interest in mean...

Water pollution caused by heavy metals and organic compounds is an environmental problem with negative impact, making the restoration of water quality a priority. In this paper, the adsorption of xylenol orange dye (XO) on vitreous tuff mineral (VT) was studied. It was established that the adsor...

Ordered bi-porous bioinspired chitosan foams were prepared by a unidirectional freeze-drying method, their structures and properties such as porosity were characterized. The adsorption performance of bioinspired chitosan foams for xylenol orange (XO) was studied. The bi-porous material has good ...

The interaction of the triphenylmethane dye xylenol orange with cationic surfactants cetyltrimethylammonium bromide and cetylpyridinium chloride was studied by absorption spectrophotometry and principal component analysis of infrared spectra. Upon the addition of surfactants the yellow color of ...

Studies on the optical absorbance spectra of Fricke xylenol orange gel dosimeters were performed, in the wavelength range from 300 nm to 800 nm, in order to highlight some particular characteristics that can affect the achievable precision. The spectra are different mainly due to the different t...

The complexation between Xylenol Orange (XO) and Fe3+ ions plays a key role in Fricke-gel dosimeters for the determination of the absorbed dose via UV–vis analysis. In this study, the effect of XO and the acidity of the solution on the complexation mechanism was investigated. Moreover, starting...

Gel dosimeters have the potential to measure radiation dose in 3D, allowing for improved treatment planning in radiotherapy. Despite extensive research over the last three decades, gel dosimeters have yet to achieve widespread clinical acceptance. The major limitation is the spatial instability ...

Scale drop disease virus (SDDV) is an emerging pathogen that causes multiple outbreaks in farmed Asian sea bass across many regions in Southeast Asia and results in severe economic losses to the exports of fish. With no current standard vaccination protocol against this virus, routine testing th...

Optical absorbance and dynamic light scattering studies of Fricke xylenol orange gel dosimeters loaded with laponite were carried out with the aim to investigate possible effects of nanoparticles on the dosimetric properties and diffusion phenomena of ferric ions. A procedure for incorporating l...

Loop-mediated isothermal amplification (LAMP) can amplify DNA specifically and sensitively. Under minimal buffering conditions, it produces hydrogen ions that lower the pH of the solution upon DNA amplification. This characteristic was applied to visually detect amplified DNA of Escherichia coli...

Purpose of this study is to test if possible effects of gelation temperature and pH on the cross-linking process between poly(vinyl alcohol) (PVA) and glutaraldehyde (GTA), have consequences on the dosimetric properties of PVA-GTA Xylenol Orange Fricke gel dosimeters. Therefore, dose-response cu...

Diisopropyl phosphorofluoridate (commonly known as diisopropyl fluorophosphate and commonly abbreviated DFP) was adsorbed in dry NaX zeolite with and without adsorption of a stoichiometric amount of water. The chemical products from the reaction of zeolite and water with DFP, in relation to resi...

We monitor the T-jump pyrolysis and combustion reactions of diisopropyl methylphosphonate (DIMP) via FTIR and kinetic FTIR. DIMP is heated at 10 °C/s, ∼1800 °C/s, and ∼18,000 °C/s to temperatures between 500 °C and 1200 °C in nitrogen, air, and an oxygen-rich environment. We observe prope...

The structures of (η6-C18H24)Cr(CO)3 (1) and of a trigonal form of [(η6-C18H24)Mn(CO)3]BF4 (2) are reported. For 1 the CO ligands project on to the unbridged CC bonds of the substituted benzene ring with CrC(aryl) 2.230(5) Å (average). Crystals of 2 are intimately twinned, but this was suc...

The synthesis, spectroscopic properties, and X-ray structure of dodecahydrotriphenylene(tricarbonyl)manganese(I) tetrafluoroborate, [(η6-C18H24)Mn(CO)3][BF4] are reported. The cation has approximate C3 symmetry with the MnCO vectors projected across the unbridged CC bonds of the arene ligand.