|别名||乙偶姻 ;甲基乙酰甲醇, 3-羟基-2-丁酮，乙酰基甲基原醇 ;3-Hydroxy-2-butanone Acetylmethylcarbinol|
|个人防护设备||dust mask type N95 (US),Eyeshields,Gloves|
Many parasitic nematodes actively seek out hosts in which to complete their lifecycles. Olfaction is thought to play an important role in the host-seeking process, with parasites following a chemical ...Read More
Environmental and seasonal influences on red raspberry flavour volatiles and identification of quantitative trait loci (QTL) and candidate genes.
Raspberry volatiles are important for perceptions of sensory quality, mould resistance and some have nutraceutical activities. Twelve raspberry character volatiles were quantified, 11 of them in fruit...Read More
Discrimination of Chinese vinegars based on headspace solid-phase microextraction-gas chromatography mass spectrometry of volatile compounds and multivariate analysis.
Headspace solid-phase microextraction (HS-SPME) coupled with gas chromatography mass spectrometry (GC-MS) was applied for the determination of the characteristic volatile profiles of Chinese vinegars....Read More
Removal of pathogenic factors from 2,3-butanediol-producing Klebsiella species by inactivating virulence-related wabG gene.
Klebsiella species are the most extensively studied among a number of 2,3-butanediol (2,3-BDO)-producing microorganisms. The ability to metabolize a wide variety of substrates together with the ease o...Read More
Acetoin is widely used in food and other industries. A bdhA and acoA double-knockout strain of Bacillus subtilis produced acetoin at 0.72 mol/mol, a 16.4 % increased compared to the wild type. Subsequ...Read More
Acetoin production enhanced by manipulating carbon flux in a newly isolated Bacillus amyloliquefaciens.
A new strain, FMME044, exhibited a remarkable ability to synthesize acetoin and was identified as Bacillus amyloliquefaciens. The following characteristics of enzyme activity were found: 2,3-butanedio...Read More
Using analytical procedures that are widely used by laboratories investigating metabolic disorders, we investigated urinary organic acid excretion by premature neonates who were receiving the usual cl...Read More
Listeria monocytogenes, a major foodborne pathogen, possesses a number of mechanisms that enable it to combat the challenges posed by acidic environments, such as that of acidic foods and the gastroin...Read More
Enhanced acetoin production by Serratia marcescens H32 with expression of a water-forming NADH oxidase
Cofactor engineering was employed to enhance production of acetoin by Serratia marcescens H32. 2,3-Butanediol was a major byproduct of acetoin fermentation by S. marcescens H32. In order to decrease 2...Read More
Production of 2,3-butanediol by Bacillus subtilis takes place in late-log or stationary phase, depending on the expression of bdhA gene encoding acetoin reductase, which converts acetoin to 2,3-butane...Read More
Production of (2S,3S)-2,3-butanediol and (3S)-acetoin from glucose using resting cells of Klebsiella pneumonia and Bacillus subtilis.
Production of highly pure (2S,3S)-2,3-butanediol ((2S,3S)-2,3-BD) and (3S)-acetoin ((3S)-AC) in high concentrations is desirable but difficult to achieve. In the present study, glucose was first trans...Read More
Pectobacterium species are necrotrophic bacterial pathogens that cause soft rot diseases in potatoes and several other crops worldwide. Gene expression data identified Pectobacterium carotovorum subsp...Read More
The aroma composition, the microbial composition and the sensory profile were measured in sliced saveloy samples packed in modified atmosphere (MA). The main objective was to identify aroma compounds ...Read More
Conservation and diversity of seed associated endophytes in Zea across boundaries of evolution, ethnography and ecology.
Endophytes are non-pathogenic microbes living inside plants. We asked whether endophytic species were conserved in the agriculturally important plant genus Zea as it became domesticated from its wild ...Read More
The transcriptional response of Listeria monocytogenes during adaptation to growth on lactate and diacetate includes synergistic changes that increase fermentative acetoin production.
The organic acids lactate and diacetate are commonly used in combination in ready-to-eat foods because they show synergistic ability to inhibit the growth of Listeria monocytogenes. Full-genome microa...Read More
Ligustrazine formation in Zhenjiang aromatic vinegar: changes during fermentation and storing process.
Zhenjiang aromatic vinegar is one of the most well-known traditional fermented vinegars in China. Previously, a alkylpyrazine named ligustrazine was found as a bioactive compound in Zhenjiang aromatic...Read More
During fermentation of sugars, a number of bacterial species are able to switch from mixed acid production to acetoin and 2,3-butanediol production in order to avoid lethal acidification of their envi...Read More
The evolution of breath composition during oral glucose tolerance tests (OGTTs) was analysed by thermal desorption/gas chromatography/mass spectrometry in 16 subjects and correlated to blood glucose l...Read More
New insights into Lactococcus lactis diacetyl- and acetoin-producing strains isolated from diverse origins.
Lactococcus lactis subsp. lactis biovar diacetylactis strains are used in the dairy industry for generating acetoin and notably diacetyl which imparts a high level of buttery flavor notes. A collectio...Read More
Synthesis of pure meso-2,3-butanediol from crude glycerol using an engineered metabolic pathway in Escherichia coli.
meso-2,3-Butanediol (meso-2,3-BDO) is essential for the synthesis of various economically valuable biosynthetic products; however, the production of meso-2,3-BDO from expensive carbon sources is an ob...Read More
Disruption of the acetate kinase (ack) gene of Clostridium acetobutylicum results in delayed acetate production.
In microorganisms, the enzyme acetate kinase (AK) catalyses the formation of ATP from ADP by de-phosphorylation of acetyl phosphate into acetic acid. A mutant strain of Clostridium acetobutylicum lack...Read More
Whole-genome sequencing and phenotypic analysis of Bacillus subtilis mutants following evolution under conditions of relaxed selection for sporulation.
Little is known about how genetic variation at the nucleotide level contributes to competitive fitness within species. During a 6,000-generation study of Bacillus subtilis evolved under relaxed select...Read More
To study organic acid excretion, urine was collected from 52 preterm infants at weekly intervals and analysed by capillary gas chromatography-mass spectrometry. Twelve of 22 babies born before 33 week...Read More
Seventy-three staphylococcal strains isolated from pyrodermatitis in dogs were classified as Staphylococcus intermedius (52 strains) or Staphylococcus aureus (21 strains) on the basis of acetoin forma...Read More
Simple and sensitive determination of diacetyl and acetoin in biological samples and alcoholic drinks by gas chromatography with electron-capture detection.
Acetoin was quantitatively oxidized into diacetyl by Fe3+ in 1 M perchloric acid. The reaction of diacetyl with 4,5-dichloro-1,2-diaminobenzene afforded 6,7-dichloro-2,3-dimethylquinoxaline (DCDMQ), w...Read More