RUTLAND - As most of the world tuned into the opening ceremonies of the 1998 Winter Olympic Games in Nagano, Japan, one young Japanese woman said goodbye to the Olympic site and boarded a plane for a ...month's stay in America. Sachiko Miyasaka, a 20-year-old native of Ibaraki, a town just outside Nagano, arrived, at Logan International Airport in Boston last Friday. She was greeted by several students and Assistant Principal John N. Bebas from Naquag School in Rutland. Elizabeth was one of four students who won Naquag's Olympic trivia contest, with the prize being the opportunity to greet Miyasaka at the airport.
RUTLAND - The Quinsigamond District of the Boy Scouts held its annual Winter Challenge yesterday at Treasure Valley. Scouts from Worcester, Holden, Paxton, Rutland and other surrounding towns ...participated in the event. The Boy Scout Winter Challenge, formerly called the Klondike Derby, has been an annual event for over 35 years. "The idea of the Winter Challenge is based on the Klondike races in Alaska. Some of the stations are set up to represent the different challenges that the racers might have faced," said Philip F. Masterson, assistant Scout master and former Eagle Scout. "It's winter survival," he said.
Abiotic degradation of catechol, 1-naphtol, trichlorophenol and o-nitrophenol Borraccino, R; Pauss, A; Lebeault, J.M. (Technical Univ. of Compiegne (France). Biotechnological Processes Division. Chemical Engeneering Department)
Mededelingen - Faculteit Landbouwkundige en Toegepaste Biologische Wetenschappen. Universiteit Gent (Belgium),
(1993), Letnik:
58, Številka:
4a
Journal Article
Various phenolic compounds were proved to be photodegraded under conditions approximating those in the environment (i.e. pH, dissolved oxygen, temperature and U.V. iradiation). Non biological ...degradation was proved in laboratory by the disappearance of catechol and 1-naphtol in uninoculated buffered growth medium. To approach their biodegradation rates, it must be important to evaluate the abiotic part in the disappearance of those from bacterial culture medium. While 2,4,6-trichlorophenol and o-nitrophenol were quite stable in all conditions tested, neutral pH and dissolved oxygen were revealed to be critical factors of the stability of catechol and 1-naphtol. These oxidation reactions with molecular oxygen (also in form of phosphate, nitrate or nitrite) were catalyzed by metal oxides (proceeding of trace elements) as electron acceptors. So it's important to point to the fact that the removal of unstable toxic compounds was a combination of chemical oxidation and biodegradation by utilization as carbon source by micro-organisms.
Abiotic degradations of cathecol and 1-naphtol Borraccino, R; Kharoune, M; Wershun, A ...
Mededelingen - Faculteit Landbouwkundige en Toegepaste Biologische Wetenschappen. Universiteit Gent (Belgium),
(1994), Letnik:
59, Številka:
4b
Journal Article
Only a few studies have examined the question of the chemical fates of organic compounds before considering their biodegradation by microorganisms. The stability of catechol and 1-naphtol was tested ...in chemical (Tris-HCl) and physiological (phosphate/carbone) buffers in aerobic sterile conditions. The transformation rates of our compounds were tested with regard to the pH (between 7.0 and 9.0) and to the presence of dissolved oxygen at ambient temperature. The expected unstability of catechol was confirmed by a first-order rate constant of disappearance. The transformation of naphtol, quite stable alone, was initiated by the presence of catechol. The results suggested the importance of the evaluation of the abiotic part in the disappearance of catechol and 1-naphtol from bacterial culture medium without biomass conversion.
Biodegradability of abiotically transformed catechol and 1-naphtol Kharoune, M; Wersuhn, A; Borraccino, R ...
Mededelingen - Faculteit Landbouwkundige en Toegepaste Biologische Wetenschappen. Universiteit Gent (Belgium),
(1994), Letnik:
59, Številka:
4b
Journal Article
Phenolic toxic compounds, such as catechol and 1-naphtol, generate considerable damage in natural ecosystems. It has become an obvious problem over the past decades. Bioremediation studies have ...therefore been undertaken, with positive results. However catechol and 1-naphtol were recently shown to be chemically unsteady in mixture. These transformations are greatly affected by the pH conditions, quite slow in acidic conditions and very rapid at pH greater than 8.0. The abiotic transformation of these toxics interferes with the evaluation of the capacity or degradation rates of microorganisms. In the present study, the aerobic biodegradability of abiotically transformed catechol and 1-naphtol was investigated, in comparison with those of the untransformed compounds in order to choose the best treatment for the degradation of effluents which contain these compounds (with or without a chemical step before the biological treatment).
