Combining the information of the IR spectrum and GC/MS results, we conclude that butanal, 2-butenal, acetic acid, butanoic acid, 1-butanol, water, and C[O.sub.2] are the major degradation products.
C[O.sub.2], butanal, butenal, acetic acid, butanoic acid, and butanol are the major products of thermal oxidative degradation of PVB.
Nitrogen Atmosphere Air Atmosphere E (kJ/mole) A (l/min) E (kJ/mole) A (l/min) Acetic acid 231 2.46 E17 300 5.93 E24 Butanoic acid 407 8.26 E30 199 6.53 E15 Butanal 349 3.37 E26 208 5.70 E16 Butenal 334 1.91 E25 226 1.22 E18 Butanol 475 5.97 E35 203 1.57 E16 Furan 616 6.81 E38 - - Carbon dioxide - - 202 2.33 E16
As the polymer was thermally activated in air, oxygen attacks the hydrogen on the [Mathematical Expression Omitted] and [Mathematical Expression Omitted] carbons initially, and B-I as well as B-II bonds are broken to form butanoic acid. It is based on [Mathematical Expression Omitted] and/or [Mathematical Expression Omitted], which represent ether groups undergoing a cleavage reaction in an oxygen atmosphere at high temperatures.
Evidence for 2-hydroxy-4 (methylthio) butanoic acid and DL-methionine having different dose responses in growing broilers.
Effects of liquid DL-2-hydroxy-4-methylthio butanoic acid on growth performance and immune responses in broiler chickens.
Conversion of the methionine hydroxy analogue DL-2-hydroxy-(4-methylthio) butanoic acid to sulfur-containing amino acids in the chicken small intestine.
Comparative in vitro and in vivo absorption of 2-hydroxy-4 (methylthio) butanoic acid and methionine in the broiler chicken.
989: Biodegradation of Poly(Hydroxy Butanoic Acid
) Copolymer Mulch Films in Soil
(2) Chelate of one Cu atom coordinated with 2 molecules of 2-hydroxy-4-methylthio butanoic acid
(1) Antibiotic treatment was fed 200 ppm chloretetracycline (Jinghe Group, Inner Mongolia, China) and 60 ppm lincospectin (Pfizer Animal Health, NJ, USA); Potassium diformate was supplied by Tiaozhan group, Beijing, China; ASD: ACTIVATE Starter DA was a dry organic acid blend composed of calcium salt of 2-hydroxy-4-(methylthio) butanoic acid
, fumaric acid, benzoic acid, and carrier with 31% L-met activity (supplied by Novus International, Inc., St.
Acidogenesis, when the obtained in the first stage components are decomposed by the acidogenic bacteria into other organic (acetic, propionic, butanoic acids
, alcohols and aldehydes) and inorganic materials ([H.sub.2], C[O.sub.2], [N.sub.2], [H.sub.2]S).