Alkaloids and Nitrosamines in Betel Quid: A Biochemical Exploration of Carcinogenicity.

Betel quid contains two major ingredients; Areca catechu and Piper betel, often consumed with slaked lime, tobacco, certain flavouring agents, colouring agents, herbs, and spices according to personal preferences. The areca nut alkaloids (arecoline, arecaidine, guvacine, and guvacoline), and tobacco alkaloids (nicotine, nor-nicotine) undergo nitrosation during chewing in the oral cavity with the presence of nitrite and thiocyanate and endogenously. Among the nitrosation products generated areca nut-derived nitrosamine (ADNA): 3-(methylnitrosamino) Propionitrile (MNPN) and the two tobacco-specific nitrosamines (TSNAs); N'-nitrosonornicotine (NNN) and 4-(methylnitrosamino)-1-(3-pyridyl)-1-butanone) (NNK) are considered Group 1 human carcinogens.

Adaptations of K 12 to Synchrotron Sourced THz Radiation.

The biological effects of electromagnetic field (EMF) irradiation in the terahertz (THz) range remain ambiguous, despite numerous studies that have been conducted. In this paper, the metabolic response of K 12 to EMF irradiation was examined using a 1.0 W m incident synchrotron source (SS) in the range of 0.

Shedding light on biochemical changes in single neuron-like pheochromocytoma cells following exposure to synchrotron sourced terahertz radiation using synchrotron source Fourier transform infrared microspectroscopy.

Synchrotron sourced Fourier transform infrared (SS FTIR) microspectroscopy was employed to investigate the biological effects on the neuron-like pheochromocytoma (PC 12) cells after exposure to synchrotron sourced terahertz (SS THz) radiation. Over 10 min of exposure, the PC 12 cells received a total energy of 600 J m, with a total incident power density of ∼1.0 W m (0.

Preservation of strawberries using jellyfish gelatin-based biodegradable films and coatings under refrigerated storage.

This study investigated the applicability of the biodegradable films and coatings prepared from gelatin extracted from jellyfish using two extraction methods; conventional hot water extraction and microwave-assisted extraction, for the preservation of strawberries under refrigerated storage (4 °C), compared to biodegradable films and coatings prepared from analytical grade cold water fish skin gelatin and porcine skin gelatin. After 21 days of storage, uncoated strawberries (control group) exhibited visual decay and fungal attacks while coated or film-wrapped strawberries exhibited a better appearance. Coating or wrapping with gelatin films significantly reduced the weight loss of strawberries and the changes in color, hardness, moisture content, pH, titratable acidity, and total soluble solids of coated/film-wrapped fruits during storage were minimal compared to the uncoated fruits.