Category: Pyrazines

Chemistry is the experimental and theoretical study of materials on their properties at both the macroscopic and microscopic levels. 20737-42-2, Name is 3-Oxo-3,4-dihydropyrazine-2-carboxylic acid, molecular formula is C5H4N2O3. In an article, author is Burgut, Aykut,once mentioned of 20737-42-2, Product Details of 20737-42-2.

Growth inhibition of foodborne pathogens by co-microencapsulation of lactobacilli cell free and propolis extracts

Cell free extracts (CFE) obtained fromLactobacillus plantarumFI 8595 andLactobacillus reuteriATCC 55730 alone or in combination with propolis ethanolic or water extracts (1%) were microencapsulated with maltodextrin (25%) before the subsequent spray drying process. They were morphologically characterized by scanning electron microscope. Chemical compositions of pure extracts were identified by gas chromatography-mass spectrometry. Antimicrobial activities of pure and microencapsulated extracts against four foodborne pathogens (Staphylococcus aureusATCC29213,Listeria monocytogenesATCC19112,Klebsiella pneumoniaeATCC700603 andSalmonellaParatyphi A NCTC13) were determined using agar well diffusion, broth microdilution and time kill assays. CFE fromL. reuteriandL. plantarumconsisted of acetic acid, pyrrolo[1,2-a]pyrazine-1,4-dione, hexahydro-3-(phenylmethyl)-, 2,3,4-trihydroxybenzaldehyde and 9-octadecenoic acid. The results also indicated the presence of two respective major compounds, namely, 2-methoxy-4-vinylphenol (19.03%) and trans-cinnamic acid (27.67%) in water and ethanolic propolis extracts. Presence of propolis extracts mainly ethanolic extract in microencapsulation led to higher inhibition zones against all foodborne pathogens (p < .05). The co-microencapsulation of CFE fromL. reuteriin combination with ethanolic or water extract of propolis resulted in 2.34- and 2.2-fold higher inhibition zone towardsL. monocytogenes.Pure and microencapsulated CFE fromL. reuteriresulted in 2.89 and 2.14 log cfu/ml reduction in growth ofS.Paratyphi A at 3 hr, respectively. The co-microencapsulation of CFE from lactobacilli and propolis extracts mainly ethanolic extract could be suggested as a novel antimicrobial on inhibition of food pathogens, as they contain abundant bioactive substances. If you¡¯re interested in learning more about 20737-42-2. The above is the message from the blog manager. Product Details of 20737-42-2.

Chemo-enzymatic cascade processes are invaluable due to their ability to rapidly construct high-value products from available feedstock chemicals in a one-pot relay manner. In an article, author is Verbitskiy, Egor V., once mentioned the application of 123-32-0, Name is 2,5-Dimethylpyrazine, molecular formula is C6H8N2, molecular weight is 108.14, MDL number is MFCD00006147, category is Pyrazines. Now introduce a scientific discovery about this category, COA of Formula: C6H8N2.

The effect of molecular structure on the efficiency of 1,4-diazine-based D-(pi)-A push-pull systems for non-doped OLED applications

A series of novel D-A and D-pi-A push-pull systems based on a pyrazine and quinoxaline acceptor, bearing various electron-donating triphenylamine and carbazole moieties, are compared. A significant difference in electrochemical and photophysical properties was found depending on molecular structure. The compounds have strong solvatochmmic properties. Quinoxaline-containing systems exhibit delayed fluorescence (DF) in thermal vacuum deposition films. Despite the low quantum yield of fluorescence in the solid state (less than 10%), organic light-emitting diodes with sufficiently high efficiency (4.2 cd/A) have been fabricated on the basis of this push-pull systems. The best results were obtained for compounds exhibiting DF. The possible channel for increasing the efficiency of OLED can be associated with the hot excitons mechanism.

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In an article, author is Rohnacher, Valentina, once mentioned the application of 2847-30-5, HPLC of Formula: C6H8N2O, Name is 2-Methoxy-3-methylpyrazine, molecular formula is C6H8N2O, molecular weight is 124.1405, MDL number is MFCD00006127, category is Pyrazines. Now introduce a scientific discovery about this category.

Functionalized Tetrapodal Diazatriptycenes for Electrostatic Dipole Engineering in n-Type Organic Thin Film Transistors

A diazatriptycene-based tetrapodal scaffold with thiol anchors enforces a nearly upright orientation of functional groups, introduced to its quinoxaline subunit, with respect to the substrate upon formation of self-assembled monolayers (SAMs). Substitution with electron-withdrawing fluorine and cyano as well as electron-rich dimethylamino substituents allows tuning of the molecular dipole and, consequently, of the work function of gold over a range of 1.0 eV (from 3.9 to 4.9 eV). The properties of the SAMs are comprehensively investigated by infrared reflection absorption spectroscopy, near edge X-ray absorption fine structure spectroscopy, and X-ray photoelectron spectroscopy. As prototypical examples for the high potential of the presented SAMs in devices, organic thin-film transistors are fabricated.

If you are interested in 2847-30-5, you can contact me at any time and look forward to more communication. HPLC of Formula: C6H8N2O.

In an article, author is Hisaki, Ichiro, once mentioned the application of 20737-42-2, Quality Control of 3-Oxo-3,4-dihydropyrazine-2-carboxylic acid, Name is 3-Oxo-3,4-dihydropyrazine-2-carboxylic acid, molecular formula is C5H4N2O3, molecular weight is 140.0969, MDL number is MFCD00235136, category is Pyrazines. Now introduce a scientific discovery about this category.

Positional Effects of Annelated Pyrazine Rings on Structure and Stability of Hydrogen-Bonded Frameworks of Hexaazatrinaphthylene Derivatives

A porous hydrogen-bonded organic framework (HOF) composed of N-hetero pi-conjugated molecules (N pi-HOF) is a promising candidate for multifunctional porous materials. However, such HOFs are still limited and only a handful of examples have been reported. In this study, we investigated the positional effects of annelated pyrazine rings on the structure and stability of N pi-HOFs to establish a design principle for N pi-HOFs. A new isomer of hexaazatrinaphthylene (CPBTQ) was synthesized and subjected to N pi-HOF construction, activation, and an evaluation of stability and permanent porosity. A comparison between two kinds of N pi-HOFs composed of isomers (CPBTQ and CPHATN) possessing three pyrazine rings annelated at different positions indicates that the positional difference of the pyrazine rings strongly affects the conformation of the peripheral phenylene groups, which then leads to different structures and stabilities of the N pi-HOFs. The activated N pi-HOF composed of CPBTQ (CPBTQ-1a) is revealed to exhibit a Brunauer-Emmett-Teller surface area of 471 m(2) g(-1) and shows HCl responsiveness thanks to the basic pyrazine rings annelated to the triphenylene core. We believe that the present results can contribute not only to the construction of multifunctional porous materials but also to the chemistry of heteroaromatic compounds.

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Application of 22047-25-2, Enzymes are biological catalysts that produce large increases in reaction rates and tend to be specific for certain reactants and products. 22047-25-2, Name is Acetylpyrazine, SMILES is C1=C(N=CC=N1)C(=O)C, belongs to Pyrazines compound. In a article, author is Yan, Jin-Long, introduce new discover of the category.

Crystal structure of diethanol-kappa O-1-bis(mu(2)-N-((2-oxidonaphthalen-1-yl)methylene)pyrazine-2-carbohydrazonato-kappa N-5,O,O ‘:O ‘:N ‘)-bis(nitrato-kappa O-2,O ‘)dieuropium(III), C36H32N10O12Eu2

C36H32N10O12Eu2, monoclinic, C2/c (no. 15), a = 16.445(2) angstrom, b = 10.0920(14) angstrom, c = 23.865(3) angstrom, beta = 100.115(8)degrees, V = 3899.3(9) angstrom(3), Z = 4, Rgt(F) = 0.0687, wR(ref)(F-2) = 0.2065, T = 150(2) K.

Application of 22047-25-2, Consequently, the presence of a catalyst will permit a system to reach equilibrium more quickly, but it has no effect on the position of the equilibrium as reflected in the value of its equilibrium constant.I hope my blog about 22047-25-2 is helpful to your research.

A catalyst don’t appear in the overall stoichiometry of the reaction it catalyzes, but it must appear in at least one of the elementary reactions in the mechanism for the catalyzed reaction. 123-32-0, Name is 2,5-Dimethylpyrazine, molecular formula is C6H8N2. In an article, author is Martin, Cibely S.,once mentioned of 123-32-0, SDS of cas: 123-32-0.

A new polymeric thin film by using electropolymerization: thin film of poly (phenazine-salen) obtained from 2,2 ‘-[1,2-ethanediylbis (nitrilomethylidyne)] -bis[4-amino-phenol]

In the last years, the study of the formation of a polymer containing multidentate Schiff-base ligand as subunits has been performed. In general, the electropolymerization occurs through the interaction between the phenyl rings and metallic centers. However, in this paper, we proposed a new polymeric thin film formation from 2,2’-[1,2-ethanediylbis(nitrilomethylidyne)]bis[4-amino-phenol] obtained by electropolymerization. The electropolymerization mechanism for poly(phenazine-salen) formation was based on the carbon-nitrogen coupling. The effect of experimental parameters such as scan rate, applied potential range, supporting electrolyte, and solvent type on the electropolymerization process was also evaluated. The poly(phenazine-salen) film was characterized by cyclic voltammetry and electrochemical impedance spectroscopy in an inert supporting electrolyte showing a redox couple ascribed to pyrazine moieties. The Mott-Schottky plot of the electropolymerized material indicated that the polymer is an n-type semiconductor. The results indicate a polymeric formation controlled by the electropolymerization parameters and the electrochemical behavior tuned by the ions insertion/extraction from supporting electrolyte.

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One of the major reasons for studying chemical kinetics is to use measurements of the macroscopic properties of a system, such as the rate of change in the concentration of reactants or products with time. 290-37-9, Name is Pyrazine, formurla is C4H4N2. In a document, author is Zhou, Xiaomin, introducing its new discovery. Category: Pyrazines.

Urine Metabolome Profiling Reveals Imprints of Food Heating Processes after Dietary Intervention with Differently Cooked Potatoes

Heat treatment is a widely used method for food processing, and the compounds formed by heat processes may serve as biomarkers of heated food intake in nutrition studies. Therefore, we aimed to characterize the differential metabolic signatures resulting from intake of different potato products and identify potential intake biomarkers. In a randomized, controlled, crossover meal study, healthy volunteers consumed boiled rice, boiled potatoes, and two deep-fried potato products, potato chips and French fries. The urine metabolome was acquired by LC-MS-based untargeted metabolomics. Twenty-two selected metabolites were found for deep-fried potatoes, two for potato intake in general, and one for boiled rice. Fourteen of the 22 selected metabolites were tentatively identified as furan-, pyrrole- and pyrazine-derived compounds indicative of Maillard reactions. With further validation, these candidate biomarkers will be important tools to investigate the influence of heated foods on human health.

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Catalysts are substances that increase the reaction rate of a chemical reaction without being consumed in the process. 2847-30-5, Name is 2-Methoxy-3-methylpyrazine, SMILES is COC1=C(C)N=CC=N1, belongs to Pyrazines compound. In a document, author is Ashokkumar, Shanthinie, introduce the new discover, Application In Synthesis of 2-Methoxy-3-methylpyrazine.

Creation of novel alleles of fragrance gene OsBADH2 in rice through CRISPR/Cas9 mediated gene editing

Fragrance in rice grains is a key quality trait determining its acceptability and marketability. Intensive research on rice aroma identified mutations inbetaine aldehyde dehydrogenase(OsBADH2) leading to production of aroma in rice. Gene editing technologies like CRISPR/Cas9 system has opened new avenues for accelerated improvement of rice grain quality through targeted mutagenesis. In this study, we have employed CRISPR/Cas9 tool to create novel alleles ofOsBADH2leading to introduction of aroma into an elite non-aromatic rice variety ASD16. PCR analysis of putative transformants using primers targeting the flanking regions of sgRNA in the 7(th)exon ofOsBADH2identified 37.5% potential multi-allelic mutations in T(0)generation. Sensory evaluation test in the leaves of T(0)lines identified thirteen lines belonging to five independent events producing aroma. Sequence analysis of these aromatic T(0)lines identified 22 different types of mutations located within -17 bp to +15bp of sgRNA region. The -1/-2 bp deletion in the line # 8-19 and -8/-5 bp deletion in the line # 2-16 produced strong aroma and the phenotype was stably inherited in the T(1)generation. Comparative volatile profiling detected novel aromatic compounds viz., pyrrolidine, pyridine, pyrazine, pyradazine and pyrozole in the grains of T(1)progenies of line # 8-19. This study has demonstrated the use of CRISPR/Cas9 in creating novel alleles ofOsBADH2to introduce aroma into any non-aromatic rice varieties.

The proportionality constant is the rate constant for the particular unimolecular reaction. the reaction rate is directly proportional to the concentration of the reactant. I hope my blog about 2847-30-5 is helpful to your research. Application In Synthesis of 2-Methoxy-3-methylpyrazine.

Catalysts are substances that increase the reaction rate of a chemical reaction without being consumed in the process. 19847-12-2, Name is Pyrazinecarbonitrile, SMILES is N#CC1=NC=CN=C1, belongs to Pyrazines compound. In a document, author is Wang, Yun-Juan, introduce the new discover, HPLC of Formula: C5H3N3.

Modulation of the properties of dinuclear lanthanide complexes through utilizing different beta-diketonate co-ligands: near-infrared luminescence and magnetization dynamics

A family of new dinuclear lanthanide complexes as the simplest entities showing intramolecular magnetic interactions, [Ln(2)(dbm)(2)(L)(2)(CH3OH)(2)] (Ln = Tb (1), Dy (2), Ho (3), Er (4), Yb (5), Lu (6)), [Ln(2)(acac)(2)(L)(2)(EtOH)(2)] (Ln = Dy (7), Er (8)), [Dy-2(TTA)(2)(L)(2)(CH3OH)(2)]center dot 2CH(2)Cl(2) (9) and [Dy-2(tfa)(2)(L)(2)(CH3OH)(2)] (10) (H2L = N ‘-(2-hydroxy-5-methylphenyl)-pyrazine-2-carbohydrazide, Hdbm = 1,3-diphenyl-1,3-propanedione, Hacac = acetylacetone, HTTA = 2-thenoyltrifluoroacetone, Htfa = trifluoroacetylacetone), were constructed successfully by the reaction of a Schiff base ligand H2L and four different beta-diketonate salts. As for complexes 4, 5 and 8, all exhibit the characteristic emission peaks of the corresponding Er3+, Yb3+ and Er3+ ions, respectively. Meanwhile, the excitation wavelength (510 nm) of 5 is located in the visible region, confirming its significant potential application value. Magnetic studies indicate that complexes 9 and 10 exhibit characteristic slow relaxation of magnetization with the energy barriers (U-eff) of 102 K for 9 and 140 K for 10 under a zero dc field. Under the optimized dc fields, slow magnetic relaxations are present in 2 and 7, and the U-eff values of 9 and 10 have been improved. This proves that the beta-diketonate co-ligands deserve an important role in regulating Dy-SMMs influenced by the diverse perturbations of the axial crystal field originating from minor changes in the coordination environment.

The proportionality constant is the rate constant for the particular unimolecular reaction. the reaction rate is directly proportional to the concentration of the reactant. I hope my blog about 19847-12-2 is helpful to your research. HPLC of Formula: C5H3N3.

Chemistry is the science of change. But why do chemical reactions take place? Why do chemicals react with each other? The answer is in thermodynamics and kinetics, Name: 2,5-Dimethylpyrazine, 123-32-0, Name is 2,5-Dimethylpyrazine, SMILES is C1=NC(=CN=C1C)C, belongs to Pyrazines compound. In a document, author is Bugbee, Gregory J., introduce the new discover.

Efficacy of diquat treatments on Brazilian waterweed, effects on native macrophytes and water quality: A case study

Brazilian waterweed (Egeria densa Planch) is an invasive aquatic plant that has spread to 27 countries and 39 states in the United States. Movement has been facilitated by its popularity as an aquarium plant. Once established, the plant can adversely alter ecosystems. Brazilian waterweed spreads solely by fragmentation, which suggests that it may be easier to control than plants with propagules such as seeds, tubers, and turions. Herbicides have the potential to offer targeted control; however, their use on Brazilian waterweed has yielded mixed results, and collateral damage to desirable native species is a concern. Fence Rock Lake is a 7-ha manmade impoundment in Guilford, CT, USA. Brazilian waterweed was first documented in small patches in 2009. By 2014, the plant covered most of the littoral zone, and diquat (6,7-dihydrodipyrido[1,2-a:2′,1′-c]pyrazine-5,8-diium dibromide) was applied by bottom injection at a rate of 1.8 kg active ingredient ha(-1). Control of Brazilian waterweed and effects on native species were assessed by the point intercept method. One year after treatment, in 2015, Brazilian waterweed was absent from all points except one. Another diquat treatment was performed in an effort to eradicate the plant from the lake. In 2016 and 2017, no Brazilian waterweed was found. The native plant community was resilient with an increase in species richness from 11 pretreatment to 18 two years posttreatment. Combined native species showed little change in frequency of occurrence. Frequency of occurrence of individual native species exhibited losses, gains, or little change depending on species. Bottom injected diquat concentrations remained low near the bottom and highest near the surface. No diquat was detected 10 days after treatment. Littoral zone dissolved oxygen fell to near, but not below, levels considered harmful to warm water fish. Transparency and total phosphorus were not substantially affected by the diquat treatment. This study confirms that Brazilian waterweed is highly controllable in a Connecticut lake with two successive yearly diquat treatments.

A reaction mechanism is the microscopic path by which reactants are transformed into products. Each step is an elementary reaction. In my other articles, you can also check out more blogs about 123-32-0. Name: 2,5-Dimethylpyrazine.