Tag: 100-200

On May 31, 2017, Sheng, Xiao-Qi; Wang, Yi-Chao published an article.Quality Control of 5-(Hydroxymethyl)pyrimidine-2,4(1H,3H)-dione The title of the article was Novel two-step derivation method for the synchronous analysis of inherited metabolic disorders using urine. And the article contained the following:

The aim of the present study was to conduct preliminary clin. screening and monitoring using a novel two-step derivatization process of urine in five categories of inherited metabolic disease (IMD). Urine samples (100 μl, containing 2.5 mmol/l creatinine) were taken from patients with IMDs. The collected urine was then treated using a two-step derivatization method (with oximation and silylation at room temperature), where urea and protein were removed. In the first step of the derivatization, α-ketoacids and α-aldehyde acids were prepared by oximation using novel oximation reagents. The second-step of the derivatization was that residues were silylated for anal. Urine samples were examined using gas chromatog./mass spectrometry (GC/MS) and a retention time-locking technique. The simultaneous anal. and identification of >400 metabolites in >130 types of IMD was possible from the GC/MS results, where the IMDs included phenylketonuria, ornithine trans-carbamylase deficiency, neonatal intrahepatic cholestasis caused by citrin deficiency, β-ureidopropionase deficiency and mitochondrial metabolic disorders. This method was demonstrated to have good repeatability. Considering a-ketoglutarate (α-KG) as an example, the relative standard deviations (RSDs) of the α-KG retention time and peak area were 0.8 and 3.9%, resp., the blank spiked recovery rate was between 89.6 and 99.8%, and the RSD was ≤7.5% (n=5). The method facilitates the anal. of thermally non-stable and semi-volatile metabolites in urine, and greatly expands the range of materials that can be synchronously screened by GC/MS. Furthermore, it provides a comprehensive, effective and reliable biochem. anal. platform for the pathol. research of IMDs. The experimental process involved the reaction of 5-(Hydroxymethyl)pyrimidine-2,4(1H,3H)-dione(cas: 4433-40-3).Quality Control of 5-(Hydroxymethyl)pyrimidine-2,4(1H,3H)-dione

The Article related to inherited metabolic disease urine biomarker diagnosis gc ms, biomarker, inherited metabolic disorders, simultaneous, two-step derivatization, urine, Biochemical Methods: Other (Not Covered At Other Subsections) and other aspects.Quality Control of 5-(Hydroxymethyl)pyrimidine-2,4(1H,3H)-dione

Referemce:
Pyrimidine | C4H4N2 – PubChem,
Pyrimidine – Wikipedia

Rozalski, Rafal; Gackowski, Daniel; Siomek-Gorecka, Agnieszka; Banaszkiewicz, Zbigniew; Olinski, Ryszard published an article in 2016, the title of the article was Urinary Measurement of Epigenetic DNA Modifications: A Non-Invasive Assessment of the Whole-Body Epigenetic Status in Healthy Subjects and Colorectal Cancer Patients.Reference of 5-(Hydroxymethyl)pyrimidine-2,4(1H,3H)-dione And the article contains the following content:

Active mechanism of DNA demethylation can be responsible for the activation of previously silenced genes. Products of 5-methylcytosine oxidation are released into the bloodstream and eventually excreted with urine. Therefore, whole-body epigenetic status can be assessed non-invasively on the basis of the urinary excretion of a broad spectrum of epigenetic modifications: 5-hydroxymethylcytosine (5-hmCyt), 5-formylcytosine (5-fCyt), 5-carboxycytosine (5-caCyt), and 5-hydroxymethyluracil (5-hmUra). We have developed a specific and sensitive, isotope-dilution, automated, online, two-dimensional ultra-performance liquid chromatog. system with tandem mass spectrometry (2D UPLC-MS/MS) to measure 5-hmCyt, 5-fCyt, 5-caCyt, and their deoxynucleosides in the same urine sample. Human urine contains all of the modifications except from 5-formyl-2′-deoxycytidine (5-fdC) and 5-carboxy-2′-deoxycytidine (5-cadC). A highly significant difference in the urinary excretion of 5-(hydroxymethyl)-2′-deoxycytidine (5-hmdC) was found between healthy subjects and colorectal cancer patients (3.5 vs. 7.8 nmol mmol-1 creatinine, resp.), as well as strong correlations between the majority of analyzed compounds The experimental process involved the reaction of 5-(Hydroxymethyl)pyrimidine-2,4(1H,3H)-dione(cas: 4433-40-3).Reference of 5-(Hydroxymethyl)pyrimidine-2,4(1H,3H)-dione

The Article related to liquid chromatog mass spectrometry epigenetic dna colorectal cancer urine, 2d uplc–ms/ms, dna damage, dna methylation, epigenetics, urine, Biochemical Methods: Other (Not Covered At Other Subsections) and other aspects.Reference of 5-(Hydroxymethyl)pyrimidine-2,4(1H,3H)-dione

Referemce:
Pyrimidine | C4H4N2 – PubChem,
Pyrimidine – Wikipedia

On January 31, 2022, Khattab, Reham Abdel-Halim; Barghash, Safaa Mohamed; Mostafa, Osama Mohammad Sayed; Allam, Sahar Ali; Taha, Hoda Abdel-Halim; Ashour, Ameen Abd El-Baqi published an article.HPLC of Formula: 65-71-4 The title of the article was Seroprevalence and molecular characterization of Toxoplasma gondii infecting ruminants in the North-West of Egypt. And the article contained the following:

Toxoplasma gondii is a coccidian parasite known for its heavy toll on people and livestock. It can cause abortion and a variety of congenital diseases. The current study aimed to examine some seroprevalence and mol. attributes of T. gondii obtained from ruminants in the North-West of Egypt. Specimens were random selected from five different locations in Alexandria and Matrouh governorates. A total of 483 blood samples, collected from 96 mixed flocks, were screened for anti-T. gondii IgG antibodies using ELISA (ELISA). The seropos. results were then confirmed using polymerase chain reaction (PCR) primers for the B1 and P30 genes. Specific PCR products were selected for sequencing and alignment against the GenBank, where phylogeny has been examined using the maximum likelihood, neighbor-joining, and maximum parsimony in MEGA6. ELISA confirmed the presence of T. gondii in 188 of the investigated samples (38.92%), indicating a higher prevalence in camels (64.51%) and sheep (43.75%) as compared to goats (27.93%) and cattle (13.46%). PCR confirmed the presence of T. gondii-specific sequences in 159 seropos. specimens, with homol. between 98.3 and 100%. The genetic distances between the investigated variants ranged from 0.1 to 0.9, and 7 single nucleotide polymorphisms (SNPs), were identified in the examined T. gondii specimens. The camel T. gondii parasite, isolated from Matrouh, showed a 100% homol. with the most dangerous reference strains of T. gondii-RH in the GenBank. Our results showed that B1 and P30-specific PCR could detect T. gondii in blood samples more accurately than ELISA. In addition, the statistical anal. of our data indicated that species, age, sex, and animal location were all risk factors for toxoplasmosis. These findings are likely to boost disease control and help contain the spread of T. gondii infections. The experimental process involved the reaction of 5-Methylpyrimidine-2,4(1H,3H)-dione(cas: 65-71-4).HPLC of Formula: 65-71-4

The Article related to igg b1 p30 guanine thymine toxoplasma infection, b1gene, elisa, egypt, p30 gene, ruminants, toxoplasma gondii, Microbial, Algal, and Fungal Biochemistry: Classical Genetics and other aspects.HPLC of Formula: 65-71-4

Referemce:
Pyrimidine | C4H4N2 – PubChem,
Pyrimidine – Wikipedia

Mattelaer, H.-P.; Mattelaer, C.-A.; Papastavrou, N.; Dehaen, W.; Herdewijn, P. published an article in 2017, the title of the article was Oligonucleotide promoted peptide bond formation using a tRNA mimicking approach.Computed Properties of 4433-40-3 And the article contains the following content:

TransferRNA’s role in protein translation is the prime example of an Informational Leaving Group (ILG). A simplified model produced oligophenylalanine with a modified uracil as an ILG in the presence of specific oligonucleotides. Our preliminary studies contribute to the importance of hybrid species in bridging the gap between peptides and nucleic acids. The experimental process involved the reaction of 5-(Hydroxymethyl)pyrimidine-2,4(1H,3H)-dione(cas: 4433-40-3).Computed Properties of 4433-40-3

The Article related to peptide bond formation informational leaving group oligonucleotide photolysis, oligophenylalanine uracil synthesis hybrid species aminolysis kinetics ph peptidomimetic, Amino Acids, Peptides, and Proteins: Poly(Amino Acids) and Peptides and other aspects.Computed Properties of 4433-40-3

Referemce:
Pyrimidine | C4H4N2 – PubChem,
Pyrimidine – Wikipedia

On October 15, 2016, Hu, Yanjing; Hu, Hanbin; Li, Yingying; Chen, Ruixin; Yang, Yu; Wang, Lei published an article.HPLC of Formula: 626-48-2 The title of the article was Supramolecular assemblies of tetrafluoroterephthalic acid and N-heterocycles via various strong hydrogen bonds and weak C-H···F interactions: Synthons cooperation, robust motifs and structural diversity. And the article contained the following:

A series of organic solid states including three salts, two co-crystals, and three hydrates based on tetrafluoroterephthalic acid (H2tfBDC) and N-bearing ligands (2,4-(1H,3H)-pyrimidine dione (PID), 2,4-dihydroxy-6-Me pyrimidine (DHMPI), 2-amino-4,6-dimethyl pyrimidine (ADMPI), 2-amino-4,6-dimenthoxy pyrimidine (ADMOPI), 5,6-dimenthyl benzimidazole (DMBI), 2-aminobenzimidazole (ABI), 3,5-di-Me pyrazole (DMP), and 3-cyanopyridine (3-CNpy)), namely, [(PID)2·(H2tfBDC)] (1), [(DHMPI)2·(H2tfBDC)] (2), [(H-ADMPI+)2·(tfBDC2-)·2(H2O)] (3), [(H-ADMOPI+)2·(tfBDC2-)·(H2O)] (4), [(H-DMBI+)2·(tfBDC2-)·2(H2O)] (5), [(H-ABI+)2·(tfBDC2-)] (6), [(H-DMP+)·(HtfBDC-)] (7), and [(H-3-CNpy+)·(HtfBDC-)] (8), were synthesized by solvent evaporation method. Crystal structures analyses show that the F atom of the H2tfBDC participates in multiple C-H···F hydrogen bond formations, producing different supramol. synthons. The weak hydrogen bonding C-H···F and N-H···F play an important part in constructing the diversity structures 2-8, except in crystal 1. In complexes 1-3, they present the same synthon R22(8) with different N-heterocyclic compounds, which may show the strategy in constructing the supramol. Meanwhile, the complex 3 exhibits a 2D layer, and the independent mols. of water exist in the adjacent layers. In complexes 4 and 5, the water mols. connect the neighboring layers to form 3D network by strong O-H···O hydrogen bonding. These crystals 1-8 were fully characterized by single-crystal X-ray crystallog., elemental anal., IR spectroscopy (IR), and thermogravimetric anal. (TGA). The experimental process involved the reaction of 6-Methylpyrimidine-2,4(1H,3H)-dione(cas: 626-48-2).HPLC of Formula: 626-48-2

The Article related to supramol assemble tetrafluoroterephthalic acid nitrogen heterocycle hydrogen bond tga, Physical Organic Chemistry: Other Reactions, Processes, and Spectra and other aspects.HPLC of Formula: 626-48-2

Referemce:
Pyrimidine | C4H4N2 – PubChem,
Pyrimidine – Wikipedia

Fedotov, Daniil A.; Paul, Alexander C.; Koch, Henrik; Santoro, Fabrizio; Coriani, Sonia; Improta, Roberto published an article in 2022, the title of the article was Excited state absorption of DNA bases in the gas phase and in chloroform solution: a comparative quantum mechanical study.Product Details of 65-71-4 And the article contains the following content:

We study the excited state absorption (ESA) properties of the four DNA bases (thymine, cytosine, adenine, and guanine) by different single reference quantum mech. methods, namely, equation of motion coupled cluster singles and doubles (EOM-CCSD), singles, doubles and perturbative triples (EOM-CC3), and time-dependent d. functional theory (TD-DFT), with the long-range corrected CAM-B3LYP functional. Preliminary results at the Tamm-Dancoff (TDA) CAM-B3LYP level using the maximum overlap method (MOM) are reported for thymine. In the gas phase, the three methods predict similar One Photon Absorption (OPA) spectra, which are consistent with the exptl. results and with the most accurate computational studies available in the literature. The ESA spectra are then computed for the ππ* states (one for pyrimidine, two for purines) associated with the lowest-energy absorption band, and for the close-lying nπ* state. The EOM-CC3, EOM-CCSD and CAM-B3LYP methods provide similar ESA spectral patterns, which are also in qual. agreement with literature RASPT2 results. Once validated in the gas phase, TD-CAM-B3LYP has been used to compute the ESA in chloroform, including solvent effects by the polarizable continuum model (PCM). The predicted OPA and ESA spectra in chloroform are very similar to those in the gas phase, most of the bands shifting by less than 0.1 eV, with a small increase of the intensities and a moderate destabilization of the nπ* state. Finally, ESA spectra have been computed from the min. of the lowest energy ππ* state, and found in line with the available exptl. transient absorption spectra of the nucleosides in solution, providing further validation of our computational approach. The experimental process involved the reaction of 5-Methylpyrimidine-2,4(1H,3H)-dione(cas: 65-71-4).Product Details of 65-71-4

The Article related to thymine cytosine nucleobase excited state absorption transient spectra, Physical Organic Chemistry: Other Reactions, Processes, and Spectra and other aspects.Product Details of 65-71-4

Referemce:
Pyrimidine | C4H4N2 – PubChem,
Pyrimidine – Wikipedia

Abdelaziz, A.; Zaitsau, D. H.; Buzyurov, A. V.; Verevkin, S. P.; Schick, C. published an article in 2020, the title of the article was Sublimation thermodynamics of nucleobases derived from fast scanning calorimetry.Name: 5-Methylpyrimidine-2,4(1H,3H)-dione And the article contains the following content:

The five fundamental units of the genetic code: uracil (U), thymine (T), cytosine (C), adenine (A) and guanine (G) are known for extremely low vapor pressure and low thermal stability at elevated temperatures Therefore, application of conventional techniques for the determination of sublimation enthalpies and vapor pressures fails to provide accurate results. Recently, a Fast Scanning Calorimetry method (FSC) for vapor pressure determination was developed for investigation of extremely low volatile, as well as for thermally unstable mol. and ionic mols. This success has encouraged application of the FSC method for determination of vapor pressures and sublimation enthalpies of the five nucleobases, where available literature data are in disarray. The thermodn. data of the nucleobases available in the literature were collected, evaluated, and combined with our exptl. results to reconcile available exptl. data. The set of evaluated thermochem. data on the five nucleobases was recommended as the benchmark properties for these thermally labile compounds The experimental process involved the reaction of 5-Methylpyrimidine-2,4(1H,3H)-dione(cas: 65-71-4).Name: 5-Methylpyrimidine-2,4(1H,3H)-dione

The Article related to nucleic acid base sublimation enthalpy vapor pressure heat capacity, Physical Organic Chemistry: Other Reactions, Processes, and Spectra and other aspects.Name: 5-Methylpyrimidine-2,4(1H,3H)-dione

Referemce:
Pyrimidine | C4H4N2 – PubChem,
Pyrimidine – Wikipedia

On December 26, 2014, Teimoory, Faranak; Loppnow, Glen R. published an article.Category: pyrimidines The title of the article was Initial Excited-State Structural Dynamics of 6-Substituted Uracil Derivatives: Femtosecond Angle and Bond Lengthening Dynamics in Pyrimidine Nucleobase Photochemistry. And the article contained the following:

Substituents on the pyrimidine ring of nucleobases appear to play a major role in determining their initial excited-state structural dynamics and resulting photochem. To better understand the determinants of nucleobase initial excited-state structural dynamics, we have measured the absorption and resonance Raman excitation profiles of 6-deuterouracil (6-d-U) and 6-methyluracil (6-MeU). Simulation of the resonance Raman excitation profiles and absorption spectrum with a self-consistent, time-dependent formalism shows the effect of the deuterium and Me group on the photochem. active internal coordinates, i.e. C5C6 stretch and C5X and C6X bends. The Me group on either the C5 or C6 position of uracil equally increases the excited-state reorganization energies along the C5C6 stretch. However, a lower reorganization energy of the C5X + C6X bends in 6-MeU than uracil and 5-MeU shows that C6 Me substituents reduce the bending reorganization energy. In addition, deuterium substitution at either C5 or C6 has a much smaller effect on the initial excited-state structural dynamics than Me substitution, consistent with a mass effect. These results will be discussed in light of the resulting photochem. of pyrimidine nucleobases. The experimental process involved the reaction of 6-Methylpyrimidine-2,4(1H,3H)-dione(cas: 626-48-2).Category: pyrimidines

The Article related to excited state structure dynamic uracil angle bond dft b3lyp, Physical Organic Chemistry: Other Reactions, Processes, and Spectra and other aspects.Category: pyrimidines

Referemce:
Pyrimidine | C4H4N2 – PubChem,
Pyrimidine – Wikipedia

On November 21, 2019, Andreeva, Olga V.; Belenok, Maya G.; Saifina, Liliya F.; Shulaeva, Marina M.; Dobrynin, Alexey B.; Sharipova, Radmila R.; Voloshina, Alexandra D.; Saifina, Alina F.; Gubaidullin, Aidar T.; Khairutdinov, Bulat I.; Zuev, Yuriy F.; Semenov, Vyacheslav E.; Kataev, Vladimir E. published an article.HPLC of Formula: 626-48-2 The title of the article was Synthesis of novel 1,2,3-triazolyl nucleoside analogs bearing uracil, 6-methyluracil, 3,6-dimethyluracil, thymine, and quinazoline-2,4-dione moieties. And the article contained the following:

A series of novel 1,2,3-triazolyl nucleoside analogs was synthesized via the CuAAC reaction of N1-alkynyl uracil, 6-methyluracil, 3,6-di-Me uracil, thymine and quinazolin-2,4-dione with protected azido β-D-ribofuranose. The obtained compounds differ in both the nature of the pyrimidine-2,4-dione fragment and the length of the polymethylene linker connecting it with the β-D-ribofuranosyl-1,2,3-triazol-4-yl moiety. The 1,2,3-triazolyl nucleoside analogs were evaluated for their cytotoxicity in vitro. The experimental process involved the reaction of 6-Methylpyrimidine-2,4(1H,3H)-dione(cas: 626-48-2).HPLC of Formula: 626-48-2

The Article related to quinazolinedione nucleoside analog preparation human angiogenic crystal structure, click alkyne azide triazole cycloaddition catalyst preparation nucleoside analog, Carbohydrates: Nucleosides and Nucleotides, Cobalamins, Riboflavin and other aspects.HPLC of Formula: 626-48-2

Referemce:
Pyrimidine | C4H4N2 – PubChem,
Pyrimidine – Wikipedia

On January 31, 2020, Sharipova, R. R.; Saifina, L. F.; Belenok, M. G.; Semenov, V. E.; Kataev, V. E. published an article.HPLC of Formula: 626-48-2 The title of the article was First Analog of Pyrimidine Nucleosides with Two D-Ribofuranose Residues. And the article contained the following:

The reaction of 1,3-bis(pent-4-yn-1-yl)-6-methyluracil with 2,3,5-tri-O-acetyl-β-D-ribofuranosyl azide gave 1,3-bis{3-[1-(2,3,5-tri-O-acetyl-β-D-ribofuranosyl)-1H-1,2,3-triazol-4-yl]propyl}-6-methyluracil which was deprotected by treatment with a solution of sodium methoxide in methanol to obtain 1,3-bis{3-[1-(β-D-ribofuranosyl)-1H-1,2,3-triazol-4-yl]propyl}-6-methyluracil as a first analog of pyrimidine nucleosides containing two D-ribofuranose fragments. The experimental process involved the reaction of 6-Methylpyrimidine-2,4(1H,3H)-dione(cas: 626-48-2).HPLC of Formula: 626-48-2

The Article related to click alkyne azide triazole cycloaddition catalyst preparation, pyrimidine nucleoside preparation ribofuranose pentynylmethyluracil ribofuranosyl azide, Carbohydrates: Nucleosides and Nucleotides, Cobalamins, Riboflavin and other aspects.HPLC of Formula: 626-48-2

Referemce:
Pyrimidine | C4H4N2 – PubChem,
Pyrimidine – Wikipedia