20246-35-9Relevant articles and documents
Kinetic behaviour and relative reactivities of some aldoses, amino sugars, and methylated sugars towards platinum(IV) in alkaline medium
Gupta, Kalyan Kali Sen,Begum, Bilkis Ara,Pal, Biswajit
, p. 303 - 310 (1998)
The kinetic behaviour and relative reactivities of some carbohydrates (aldoses, amino sugars and methylated sugars) towards platinum(IV) in alkaline medium have been investigated. The reactions are first order with respect to [substrate] and PtIV. The rates increase with the increase in OH-. The reactions show pseudo-first-order dependence on OH-. The oxidation rates in alkaline medium follow the order triose>tetrose>pentose>hexose. Activation parameters of the reactions have been calculated. Mechanisms have been proposed for the reactions. Copyright (C) 1998 Elsevier Science Ltd.
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Cretcher,Renfrew
, p. 1590,1593 (1932)
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Efficient production of sugar-derived aldonic acids by Pseudomonas fragi TCCC11892
Mao, Shuhong,Liu, Yanna,Hou, Yali,Ma, Xiaoyu,Yang, Juanjuan,Han, Haichao,Wu, Jianlin,Jia, Longgang,Qin, Huimin,Lu, Fuping
, p. 39897 - 39901 (2019/01/03)
Aldonic acids are receiving increased interest due to their applications in nanotechnology, food, pharmaceutical and chemical industries. Microbes with aldose-oxidizing activity, rather than purified enzymes, are used for commercial production with limited success. Thus it is still very important to develop new processes using strains with more efficient and novel biocatalytic activities for the production of adonic acids. In the present study, Pseudomonas fragi TCCC11892 was found to be an efficient producer of aldonic acids, with the production of galactonic and l-rhamnonic acid by P. fragi reported for the first time. The semi-continuous production of maltobionic acid and lactobionic acid was developed for P. fragi TCCC11892, achieving a yield of over 90 g L?1 for the first 7 cycles. The excellent performance of P. fragi in the production of lactobionic acid (119 g L?1) was also observed when using waste cheese whey as an inexpensive fermentation medium. Scaling up of the above process for production of aldonic acids with P. fragi TCCC11892 cells should facilitate their commercial applications.
Selective oxidation of uronic acids into aldaric acids over gold catalyst
Rautiainen, Sari,Lehtinen, Petra,Chen, Jingjing,Vehkam?ki, Marko,Niemel?, Klaus,Leskel?, Markku,Repo, Timo
, p. 19502 - 19507 (2015/04/28)
Herein, uronic acids available from hemicelluloses and pectin were used as raw material for the synthesis of aldaric acids. Au/Al2O3 catalyst oxidized glucuronic and galacturonic acids quantitatively to the corresponding glucaric and galactaric acids at pH 8-10 and 40-60 °C with oxygen as oxidant. The pH has a significant effect on the initial reaction rate as well as desorption of acid from the catalyst surface. At pH 10, a TOF value close to 8000 h-1 was measured for glucuronic acid oxidation. The apparent activation energy Ea for glucuronic acid oxidation is dependent on the pH which can be attributed to the higher energy barrier for desorption of acids at lower pH. This journal is
