279412

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Acid-catalyzed hydrothermal severity on the fractionation of agricultural residues for xylose-rich hydrolyzates.

Ji Ye Lee et al.

Bioresource technology, 132, 84-90 (2013-02-12)

The objective of this work was to investigate the feasibility of acid-catalyzed hydrothermal fractionation for maximum solubilization of the hemicellulosic portion of three agricultural residues. The fractionation conditions converted into combined severity factor (CS) in the range of 1.2-2.9. The

Acidification due to microbial dechlorination near a trichloroethene DNAPL is overcome with pH buffer or formate as electron donor: experimental demonstration in diffusion-cells.

Jo Philips et al.

Journal of contaminant hydrology, 147, 25-33 (2013-03-19)

Acidification due to microbial dechlorination of trichloroethene (TCE) can limit the bio-enhanced dissolution of TCE dense non-aqueous phase liquid (DNAPL). This study related the dissolution enhancement of a TCE DNAPL to the pH buffer capacity of the medium and the

Chemical shift powder spectra enhanced by multiple-contact cross-polarization under slow magic-angle spinning.

Jésus Raya et al.

Journal of magnetic resonance (San Diego, Calif. : 1997), 227, 93-102 (2013-01-15)

A simple multiple-contact cross-polarization (CP) scheme is applied to a powder sample of ferrocene and β-calcium formate under static and magic-angle spinning (MAS) conditions. The method is described analytically through the density matrix formalism. We show that multiple equilibrations-re-equilibrations with

Determination of phenylephrine in human plasma using ultra-performance liquid chromatography-tandem mass spectrometry.

Sheng Feng et al.

Journal of chromatography. B, Analytical technologies in the biomedical and life sciences, 915-916, 28-32 (2013-01-15)

This paper described a sensitive and rapid method based on ultra-performance liquid chromatography coupled to tandem mass spectrometry (UPLC-MS/MS) for the determination of phenylephrine in human plasma. Plasma samples were pre-purified by solid-phase extraction (SPE). The chromatographic separation was achieved

Random mutagenesis identifies factors involved in formate-dependent growth of the methanogenic archaeon Methanococcus maripaludis.

Christian Sattler et al.

Molecular genetics and genomics : MGG, 288(9), 413-424 (2013-06-27)

Methane is a key intermediate in the carbon cycle and biologically produced by methanogenic archaea. Most methanogens are able to conserve energy by reducing CO2 to methane using molecular hydrogen as electron donor (hydrogenotrophic methanogenesis), but several hydrogenotrophic methanogens can

Deletion of Mthfd1l causes embryonic lethality and neural tube and craniofacial defects in mice.

Jessica Momb et al.

Proceedings of the National Academy of Sciences of the United States of America, 110(2), 549-554 (2012-12-26)

Maternal supplementation with folic acid is known to reduce the incidence of neural tube defects (NTDs) by as much as 70%. Despite the strong clinical link between folate and NTDs, the biochemical mechanisms through which folic acid acts during neural

Determination of organochlorines, polychlorinated biphenyls and polybrominated diphenyl ethers in human hair: estimation of external and internal exposure.

Dasheng Lu et al.

Chemosphere, 114, 327-336 (2014-08-13)

A novel method was developed for the analysis of organochlorine pesticides (OCPs), polychlorinated biphenyls (PCBs) and polybrominated diphenyl ethers (PBDEs) in human hair samples. External contaminants of hair were extracted with acetone under sonication, while washed hair was further hydrolyzed

Trichloroethylene and trichloroethanol-induced formic aciduria and renal injury in male F-344 rats following 12 weeks exposure.

Noreen Yaqoob et al.

Toxicology, 323, 70-77 (2014-06-14)

Trichloroethylene (TCE) is widely used as a cleaning and decreasing agent and has been shown to cause liver tumours in rodents and a small incidence of renal tubule tumours in male rats. The basis for the renal tubule injury is

Mechanistic insights into iron catalyzed dehydrogenation of formic acid: β-hydride elimination vs. direct hydride transfer.

Xinzheng Yang

Dalton transactions (Cambridge, England : 2003), 42(33), 11987-11991 (2013-07-13)

Density functional theory calculations reveal a complete reaction mechanism with detailed energy profiles and transition state structures for the dehydrogenation of formic acid catalyzed by an iron complex, [P(CH2CH2PPh2)3FeH](+). In the cationic reaction pathway, a β-hydride elimination process is confirmed

The Fantastic Four: A plug 'n' play set of optimal control pulses for enhancing NMR spectroscopy.

Manoj Nimbalkar et al.

Journal of magnetic resonance (San Diego, Calif. : 1997), 228, 16-31 (2013-01-22)

We present highly robust, optimal control-based shaped pulses designed to replace all 90° and 180° hard pulses in a given pulse sequence for improved performance. Special attention was devoted to ensuring that the pulses can be simply substituted in a

Improvement of ethanol productivity and energy efficiency by degradation of inhibitors using recombinant Zymomonas mobilis (pHW20a-fdh).

Hong-Wei Dong et al.

Biotechnology and bioengineering, 110(9), 2395-2404 (2013-03-12)

Toxic compounds, such as formic acid, furfural, and hydroxymethylfurfural (HMF) generated during pretreatment of corn stover (CS) at high temperature and low pH, inhibit growth of Zymomonas mobilis and lower the conversion efficiency of CS to biofuel and other products.

New sulfate-reducing bacteria isolated from Buryatian alkaline brackish lakes: description of Desulfonatronum buryatense sp. nov.

Yana Ryzhmanova et al.

Extremophiles : life under extreme conditions, 17(5), 851-859 (2013-07-25)

New strains of sulfate-reducing bacteria were isolated from two alkaline brackish lakes located in the Siberian region of Russia, namely in the Southern Transbaikalia, Buriatia. The article presents data describing morphology, physiology, and biochemical characteristics of the isolated strains. These

Poly-3,4-ethylenedioxythiophene nanoclusters for high effective solid phase extraction.

Tian Tian et al.

Journal of chromatography. A, 1275, 17-24 (2013-01-12)

Solid phase extraction (SPE) has emerged as the widely used technique for sample preparation in the analytical process. Recent research trends of SPE are toward developing novel adsorbents to enrich the analytes simply and effectively. In this study, we proposed

High-level secretory expression of metchnikowin in Escherichia coli.

Di Wu et al.

Protein expression and purification, 91(1), 49-53 (2013-07-23)

Metchnikowin is a proline-rich peptide from Drosophila with antibacterial and antifungal activities. Its commercial application is limited due to the low immune-inducible expression in vivo. Here we present a method to produce high-yield metchnikowin in recombinant Escherichia coli. The genes

Impact of thermal and organic acid treatment of feed on apparent ileal mineral absorption, tibial and liver mineral concentration, and tibia quality in broilers.

A Hafeez et al.

Poultry science, 93(7), 1754-1763 (2014-05-28)

Minerals play an important role for growth and bone stability in broilers. Thermal treatment and inclusion of organic acids in feed may affect the mineral absorption and tibial quality in broilers. The study was conducted to investigate the effect of

Clostridium acidurici electron-bifurcating formate dehydrogenase.

Shuning Wang et al.

Applied and environmental microbiology, 79(19), 6176-6179 (2013-07-23)

Cell extracts of uric acid-grown Clostridium acidurici catalyzed the coupled reduction of NAD(+) and ferredoxin with formate at a specific activity of 1.3 U/mg. The enzyme complex catalyzing the electron-bifurcating reaction was purified 130-fold and found to be composed of

Effects of H2 and formate on growth yield and regulation of methanogenesis in Methanococcus maripaludis.

Kyle C Costa et al.

Journal of bacteriology, 195(7), 1456-1462 (2013-01-22)

Hydrogenotrophic methanogenic Archaea are defined by an H2 requirement for growth. Despite this requirement, many hydrogenotrophs are also capable of growth with formate as an electron donor for methanogenesis. While certain responses of these organisms to hydrogen availability have been

Use of multi-parameter flow cytometry as tool to monitor the impact of formic acid on Saccharomyces carlsbergensis batch ethanol fermentations.

Cláudia Freitas et al.

Applied biochemistry and biotechnology, 169(7), 2038-2048 (2013-01-30)

The use of lignocellulosic materials as substrate for bioethanol production is considered a cost-effective approach to make the biofuel production process economically sustainable. However, lignocellulosic hydrolysis releases toxic compounds such as weak acids which inhibit microorganism growth and ethanol production.

Effects of formic acid and phytase supplementation on digestibility and use of phosphorus and zinc in growing pigs.

R Blank et al.

Journal of animal science, 90 Suppl 4, 212-214 (2013-02-13)

Two studies, arranged according to a 4 × 4 Latin square design, were conducted to assess effects of dietary acidification on fungal 3-phytase (PHY) efficacy in growing pigs. In Exp. 1, effects of supplementing 500 units/kg feed of PHY and

Thermodesulfobacterium geofontis sp. nov., a hyperthermophilic, sulfate-reducing bacterium isolated from Obsidian Pool, Yellowstone National Park.

Scott D Hamilton-Brehm et al.

Extremophiles : life under extreme conditions, 17(2), 251-263 (2013-01-25)

A novel sulfate-reducing bacterium designated OPF15(T) was isolated from Obsidian Pool, Yellowstone National Park, Wyoming. The phylogeny of 16S rRNA and functional genes (dsrAB) placed the organism within the family Thermodesulfobacteriaceae. The organism displayed hyperthermophilic temperature requirements for growth with

VhuD facilitates electron flow from H2 or formate to heterodisulfide reductase in Methanococcus maripaludis.

Kyle C Costa et al.

Journal of bacteriology, 195(22), 5160-5165 (2013-09-17)

Flavin-based electron bifurcation has recently been characterized as an essential energy conservation mechanism that is utilized by hydrogenotrophic methanogenic Archaea to generate low-potential electrons in an ATP-independent manner. Electron bifurcation likely takes place at the flavin associated with the α

H2-independent growth of the hydrogenotrophic methanogen Methanococcus maripaludis.

Kyle C Costa et al.

mBio, 4(2), doi:10-doi:10 (2013-02-28)

Hydrogenotrophic methanogenic Archaea require reduced ferredoxin as an anaplerotic source of electrons for methanogenesis. H(2) oxidation by the hydrogenase Eha provides these electrons, consistent with an H(2) requirement for growth. Here we report the identification of alternative pathways of ferredoxin

Production of hybrid diesel fuel precursors from carbohydrates and petrochemicals using formic acid as a reactive solvent.

Xiaoyuan Zhou et al.

ChemSusChem, 6(2), 383-388 (2013-01-03)

We report the one-pot alkylation of mesitylene with carbohydrate-derived 5-(hydroxymethyl)furfural (HMF) as a step toward diesel-range liquids. Using FeCl(3) as a catalyst, HMF is shown to alkylate toluene, xylene, and mesitylene in high yields in CH(2)Cl(2) and MeNO(2) solvents. Efforts

Direct and reversible hydrogenation of CO2 to formate by a bacterial carbon dioxide reductase.

K Schuchmann et al.

Science (New York, N.Y.), 342(6164), 1382-1385 (2013-12-18)

Storage and transportation of hydrogen is a major obstacle for its use as a fuel. An increasingly considered alternative for the direct handling of hydrogen is to use carbon dioxide (CO2) as an intermediate storage material. However, CO2 is thermodynamically

Sodium phenylbutyrate enhances astrocytic neurotrophin synthesis via protein kinase C (PKC)-mediated activation of cAMP-response element-binding protein (CREB): implications for Alzheimer disease therapy.

Grant T Corbett et al.

The Journal of biological chemistry, 288(12), 8299-8312 (2013-02-14)

Neurotrophins, such as brain-derived neurotrophic factor (BDNF) and neurotrophin-3 (NT-3), are believed to be genuine molecular mediators of neuronal growth and homeostatic synapse activity. However, levels of these neurotrophic factors decrease in different brain regions of patients with Alzheimer disease

Bionanowhiskers from jute: preparation and characterization.

Nibedita Kasyapi et al.

Carbohydrate polymers, 92(2), 1116-1123 (2013-02-13)

Bionanowhiskers were extracted from jute by acid hydrolysis. At first cellulose microfibrils were formed by alkali treatment. Addition of an acid to the microfibrils triggered the formation of cellulose nanowhiskers. These were characterized by using different techniques viz. Fourier transform

Density functional theory study on the adsorption and decomposition of the formic acid catalyzed by highly active mushroom-like Au@Pd@Pt tri-metallic nanoparticles.

Sai Duan et al.

Physical chemistry chemical physics : PCCP, 15(13), 4625-4633 (2013-02-21)

Local structures and adsorption energies of a formic acid molecule and its decomposed intermediates (H, O, OH, CO, HCOO, and COOH) on highly electrocatalytically active mushroom-like Au-core@Pd-shell@Pt-cluster nanoparticles with two atomic layers of the Pd shell and stoichiometric Pt coverage

Immunohistochemical characterization of novel monoclonal antibodies against the N-terminus of amyloid β-peptide.

Nicolaas A Verwey et al.

Amyloid : the international journal of experimental and clinical investigation : the official journal of the International Society of Amyloidosis, 20(3), 179-187 (2013-07-09)

Abstract Amyloid β-peptide (Aβ) is a key molecule in Alzheimer's disease (AD). Reliable immunohistochemical (IHC) methods to detect Aβ and Aβ-associated factors (AAF) in brain specimens are needed to determine their role in AD pathophysiology. Formic acid (FA) pre-treatment, which

Direct analysis of formate in human plasma, serum and whole blood by in-line coupling of microdialysis to capillary electrophoresis for rapid diagnosis of methanol poisoning.

Pavel Kubáň et al.

Analytica chimica acta, 768, 82-89 (2013-03-12)

A simple method using direct injection of human blood samples and quantitative analysis of formate was developed for rapid diagnosis of methanol poisoning. A sample pretreatment device including a 500Da molecular weight cut-off dialysis membrane was in-line coupled to capillary

MTHFD1 interaction with BRD4 links folate metabolism to transcriptional regulation.

Sara Sdelci et al.

Nature genetics, 51(6), 990-998 (2019-05-28)

The histone acetyl reader bromodomain-containing protein 4 (BRD4) is an important regulator of chromatin structure and transcription, yet factors modulating its activity have remained elusive. Here we describe two complementary screens for genetic and physical interactors of BRD4, which converge

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