Solubilization and Microemulsification of Chlorinated Solvents Using Direct Food Additive (Edible) Surfactants

Ground Water ◽  
1994 ◽  
Vol 32 (4) ◽  
pp. 561-569 ◽  
Author(s):  
Bor-Jier Shiau ◽  
David A. Sabatini ◽  
Jeffrey H. Harwell
Somatechnics ◽  
2019 ◽  
Vol 9 (2-3) ◽  
pp. 188-205
Author(s):  
Sofia Varino

This article follows the trajectories of gluten in the context of Coeliac disease as a gastrointestinal condition managed by lifelong adherence to a gluten-free diet. Oriented by the concept of gluten as an actant (Latour), I engage in an analysis of gluten as a participant in volatile relations of consumption, contact, and contamination across coeliac eating. I ask questions about biomedical knowledge production in the context of everyday dietary practices alongside two current scientific research projects developing gluten-degrading enzymes and gluten-free wheat crops. Following the new materialisms of theorists like Elizabeth A. Wilson, Jane Bennett, Donna Haraway and Bruno Latour, I approach gluten as an alloy, an impure object, a hybrid assemblage with self-organizing and disorganizing capacity, not entirely peptide chain nor food additive, not only allergen but also the chewy, sticky substance that gives pizza dough its elastic, malleable consistency. Tracing the trajectories of gluten, this article is a case study of the tricky, slippery capacity of matter to participate in processes of scientific knowledge production.


2012 ◽  
Vol 25 (2) ◽  
pp. 72-83
Author(s):  
J. H. Al-Lami ◽  
and S. H. Saber ◽  
A. Y. Al-dubakel
Keyword(s):  

Author(s):  
I. Tsykhanovska ◽  
A. Alexandrov ◽  
N. Kaida ◽  
V. Evlash ◽  
Z. Kovalenko
Keyword(s):  

Author(s):  
Jacob Bamaiyi ◽  
Omajali ◽  
Sanni Momoh

This study investigates the effects of kanwa on rat gastrointestinal phosphatases. The rats were administered 7% w/v concentration of  trona (Kanwa) orally for a period of two weeks in order to investigate how this compound is being used as food additive in some homes in Nigeria. The Kanwa used in this study was the handpicked variety obtained from sellers from Anyigba market in eastern part of Kogi State, Nigeria. Kanwa, a hydrated sodium carbonate (Na2CO3NaHCO3.2H2O) was obtained as a dried lake salt. Acid phosphatase has the ability to dephosphorylate molecules containing phosphate group. The decreased and elevated level in serum or plasma acid and alkaline phosphatases serves as diagnostic indices for various diseases. Results showed that there was increase and decrease of acid phosphatase (ACP) activities in both the stomach and small intestine. The activities of alkaline phosphatase (ALP) fluctuated in the small intestine. However, in the stomach, an increase activity of ALP was noticed throughout the period of ‘Kanwa’ administration. We concluded that although the level of ‘Kanwa’ consumed in most homes may not be toxic if not taken continuously or repeatedly. Thus, continuous consumption should be discouraged as accumulation of high level of ‘Kanwa’ may cause damages or injuries to the various organs/tissues and may disrupt normal body function.


1995 ◽  
Vol 31 (1) ◽  
pp. 215-225 ◽  
Author(s):  
Gerald E. Speitel ◽  
Robert L. Segar

Aerobic cometabolism of chlorinated aliphatic solvents in biofilm reactors is a potential treatment technology for contaminated water and air streams. This research investigated cometabolism by pure and mixed cultures of methanotrophs and mixed cultures of phenol-degrading bacteria. Initial experiments with continuous-flow, packed-bed bioreactors proved unsuccessful; therefore, the major focus of the work was on sequencing biofilm reactors, which cycle between two modes of operation, degradation of chlorinated solvents and rejuvenation of the microbial population. Particular success was obtained with a mixed culture of phenol degraders in the treatment of chlorinated ethenes (e.g., trichloroethylene - TCE). Under the best operating conditions, 90% removal of TCE occurred at a 14-minute packed-bed hydraulic residence time. The bioreactors required only two, 1.5 h biomass rejuvenation periods per day to sustain this removal. Experiments with Methylosinus trichosporium OB3b were less successful because of the organism's slow growth rate, relatively poor ability to attach to surfaces, and its inability to successfully compete with other methanotrophs in the bioreactor environment. Overall, however, the research demonstrated the potential attractiveness of sequencing biofilm reactors in treating water contaminated with chlorinated solvents.


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