Fermentation patterns of some lactose-negative enteric bacteria

1974 ◽  
Vol 20 (4) ◽  
pp. 617-621
Author(s):  
Robert A. Altenbern
Keyword(s):  
Succinic Acid ◽  
Fumaric Acid ◽  
Pyruvic Acid ◽  
Enteric Bacteria ◽  
Edwardsiella Tarda ◽  
Single Strain ◽  
Providencia Alcalifaciens ◽  
Shigella Species ◽  
Acid Ratio ◽  
Fermentative Growth

Organic acids produced during fermentative growth of many lactose-negative members of Enterobacteriaceae have been determined quantitatively by thin-layer chromatography. Nearly all organisms examined elaborated succinic acid and many also produced fumaric and (or) pyruvic acid in varying ratios. Some differentiation of the genera could be achieved by calculation of the ratio of succinic/fumaric acid or succinic/pyruvic acid. Anaerogenic Salmonella strains and all Shigella species exhibited a succinic to fumaric acid ratio of less than 1.0. Aerogenic Salmonella strains yielded a succinic to fumaric acid ratio of 2.3 to 4.3. Proteus vulgaris and Proteus mirabilis were the only species examined that produced pyruvic acid in addition to succinic acid and fumaric acid. Strains of Edwardsiella tarda showed a broad range of succinic to fumaric acid ratios from 2.4 to 8.5. The single strain of Providencia alcalifaciens that was examined yielded only succinic acid and could be readily differentiated from other organisms examined.

Metabolites of Aspergillus indicus: The structure and some aspects of the biosynthesis of dihydrocanadensolide

1968 ◽  
Vol 21 (11) ◽  
pp. 2775 ◽  
Author(s):  
AJ Birch ◽  
AA Qureshi ◽  
RW Rickards
Keyword(s):  
Succinic Acid ◽  
Fumaric Acid ◽  
Pyruvic Acid ◽  
Kojic Acid ◽  
Synthetic Medium ◽  
Nitropropionic Acid

Aspergillus indicus grown on a semi-synthetic medium produces a number of metabolites including kojic acid, succinic acid, fumaric acid, β-nitropropionic acid, indazonic acids, fumaryl-~danine, and dihydrocanadensolide. The last compound is shown to have the formula (I) and is biosynthesized in part from "acetate" units; the rest of the molecule may come from pyruvic acid.

Simultaneous Gas Chromatographic Determination of Carboxylic Acids in Soft Drinks and Jams

1985 ◽  
Vol 68 (5) ◽  
pp. 902-905
Author(s):  
Taizo Tsuda ◽  
Hiroshi Nakanishi ◽  
Takashi Morita ◽  
Junko Takebayashi
Keyword(s):  
Benzoic Acid ◽  
Succinic Acid ◽  
Tartaric Acid ◽  
Carboxylic Acids ◽  
Fumaric Acid ◽  
Malic Acid ◽  
Sorbic Acid ◽  
Chromatographic Determination ◽  
Dehydroacetic Acid

Abstract A method was developed for simultaneous gas chromatographic determination of sorbic acid, dehydroacetic acid, and benzoic acid used as preservatives, and succinic acid, fumaric acid, malic acid, and tartaric acid used as acidulants in soft drinks and jams. A sample was dissolved in NH4OH-NH4CI pH 9 buffer solution, and an aliquot of the solution was passed through a QAE-Sephadex A 25 column. The column was washed with water, and the carboxylic acids were eluted with 0.1N HC1. Sorbic acid, dehydroacetic acid, and benzoic acid were extracted with ethyl ether-petroleum ether (1 + 1), and determined on a 5% DEGS + 1% H3PO4 column. Succinic acid, fumaric acid, malic acid, and tartaric acid in the lower layer were derivatized with N,0- bis(trimethylsilyl)acetamide and trimethylchlorosilane, and determined on a 3% SE-30 column. Recoveries from soft drink and jam samples fortified with 0.1% each of 7 carboxylic acids ranged from 92.4 to 102.6% for preservatives, and from 88.1 to 103.2% for acidulants.

scholarly journals Carbamazepine-Fumaric Acid and Carbamazepine-Succinic Acid Co-crystal Screening Using Solution Based Method

2017 ◽  
Vol 8 (2) ◽  
pp. 136-140 ◽  
Author(s):  
Fatinah Ab Rahman ◽  
◽  
Syarifah Abd Rahim ◽  
C. Tan Chou ◽  
Souk H. Low ◽  
...  
Keyword(s):  
Succinic Acid ◽  
Fumaric Acid

scholarly journals Aetiology and factors associated with bacterial diarrhoeal diseases amongst urban refugee children in Eastleigh, Kenya: A case control study

2013 ◽  
Vol 2 (1) ◽  
Author(s):  
Waqo G. Boru ◽  
Gideon Kikuvi ◽  
Jared Omollo ◽  
Ahmed Abade ◽  
Samuel Amwayi ◽  
...  
Keyword(s):  
Shigella Flexneri ◽  
Health Centre ◽  
Enteric Bacteria ◽  
County Council ◽  
Shigella Dysenteriae ◽  
Refugee Children ◽  
E Coli ◽  
Factors Associated ◽  
Shigella Species ◽  
Scanty Information

Introduction: Kenya is home to over 400 000 refugees from neighbouring countries. There is scanty information about diarrhoea amongst urban refugees in Kenya.Objectives: We investigated the enteric bacteria causing diarrhoea amongst urban refugee children and described the associated factors.Method: During the period of August–December 2010, urban refugee children between the ages of two and five who attended Eastleigh County Council Health Centre were enrolled into the study. Diarrhoeal cases were compared with age-matched children with no diarrhoea (controls). Stool specimens were collected and enteric bacteria isolated. A questionnaire was administered to identify risk factors.Results: A total of 41 cases and 41 controls were enrolled in the study. The age and country of origin were similar for cases and controls. The bacterial isolation rates amongst the cases were: non-pathogenic Escherichia coli 71%, Shigella dysenteriae 2.4%, Shigella flexneri 2.4%, Salmonella paratyphi 5%. For the controls, non-pathogenic E. coli 90% and enterotoxigenic E. coli (ETEC)2.4% were amongst the organisms isolated. All isolates were resistant to amoxicillin; resistance to other antibiotics varied by isolate type. Factors associated independently with diarrhoea included children not washing their hands with soap (aOR 5.9, p < 0.05), neighbour(s) having diarrhoea (aOR 39.8, p < 0.05), children not exclusively breastfed for their first 6 months (aOR 7.6, p < 0.05) and children eating food cooked the previous day (aOR 23.8, p = 0.002).Conclusions: Shigella species, Salmonella species and ETEC were found to be responsible for diarrhoea amongst the urban refugee children. Measures to control and guide the use of antibiotics are critical for the prevention of antibiotic resistance. Efforts to improve personal and domestic hygiene, including educational campaigns to promote appropriate handwashing, should be encouraged.

scholarly journals Preparation of polyaniline nanostructures doped with different dicarboxylic acids through template-free method

2014 ◽  
Vol 32 (3) ◽  
pp. 419-422
Author(s):  
Chuanyu Sun ◽  
Yu Wang
Keyword(s):  
Dicarboxylic Acid ◽  
Succinic Acid ◽  
Tartaric Acid ◽  
Fumaric Acid ◽  
Maleic Acid ◽  
Dicarboxylic Acids ◽  
Template Free ◽  
Acid Dopants

AbstractIn this article nanoscaled polyanilines (PANI) were prepared based on template-free method in the presence of dicarboxylic acid dopants (e.g. D-tartaric acid, succinic acid, maleic acid and fumaric acid). The trans-cis isomerization of butenedioic acid played an important role in the formation of nanostructures from the plane-like to nanofibers, and the PANI doped with maleic acid (MA) had larger diameter, higher crystallinity and conductivity than PANI doped with fumaric acid (FA).

Organoselenium chemistry. Synthesis of selenetan-3-ol, 1-bromo-3-selenocyanatopropan-2-ol and 2-benzylseleno-substituted fumaricand succinic acids

1983 ◽  
Vol 36 (4) ◽  
pp. 815 ◽  
Author(s):  
AP Arnold ◽  
AJ Canty
Keyword(s):  
Succinic Acid ◽  
Fumaric Acid ◽  
Maleic Acid ◽  
Organoselenium Compounds ◽  
Catalysed Reaction ◽  
Acetylenedicarboxylic Acid

Approaches to the synthesis of diselenols have led to isolation of several new organoselenium compounds. Removal of mercury, as HgS, from [1,3-diselenylpropan-2-olato(2–)-Se,Sel]-mercury(II) results in decomposition of the organoselenium fragment to selenetan-3-ol, 1,3-Dibromopropan-2-ol reacts with KSeCN to form 1-bromo-3-selenocyanatopropan-2-ol; the selenoethers 2-(benzyl- se1eno)fumaric acid [(Z)-PhCH2SeC(CO2H)=CHCO2H] and 2-(benzylseleno)succinic acid [PhCH2SeCH(CO2H)CH2CO2H] are formed by base-catalysed reaction of phenylmethaneselenol with acetylenedicarboxylic acid and maleic acid, respectively. The conformations adopted by PhCH2XCH(CO2H)CH2CO2H (X = S, Se) in acetone have been determined by 1H n.m.r. spectroscopy.

Bioconversion of fumaric acid to succinic acid by recombinantE. coli

1998 ◽  
Vol 70-72 (1) ◽  
pp. 919-928 ◽  
Author(s):  
Xiaohai Wang ◽  
C. S. Gong ◽  
George T. Tsao
Keyword(s):  
Succinic Acid ◽  
Fumaric Acid

Production of Fumaric Acid Using Rice Bran and Subsequent Conversion to Succinic Acid Through a Two-Step Process

2004 ◽  
Vol 115 (1-3) ◽  
pp. 0843-0856 ◽  
Author(s):  
Se-Kwon Moon ◽  
Young-Jung Wee ◽  
Jong-Sun Yun ◽  
Hwa-Won Ryu
Keyword(s):  
Succinic Acid ◽  
Rice Bran ◽  
Fumaric Acid ◽  
Step Process ◽  
Subsequent Conversion
Sign in / Sign up

Export Citation Format

Share Document