Pyrimidines

Ravera, Francesca; Efeoglu, Esen; Byrne, Hugh J. published an article in 2021, the title of the article was Monitoring stem cell differentiation using Raman microspectroscopy: chondrogenic differentiation, towards cartilage formation.Electric Literature of 65-71-4 And the article contains the following content:

Mesenchymal Stem Cells (MSCs) have the ability to differentiate into chondrocytes, the only cellular components of cartilage and are therefore ideal candidates for cartilage and tissue repair technologies. Chondrocytes are surrounded by cartilage-like extracellular matrix (ECM), a complex network rich in glycosaminoglycans, proteoglycans, and collagen, which, together with a multitude of intracellular signalling mols., trigger the chondrogenesis and allow the chondroprogenitor to acquire the spherical morphol. of the chondrocytes. However, although the mechanisms of the differentiation of MSCs have been extensively explored, it has been difficult to provide a holistic picture of the process, in situ. Raman Micro Spectroscopy (RMS) has been demonstrated to be a powerful anal. tool, which provides detailed label free biochem. fingerprint information in a non-invasive way, for anal. of cells, tissues and body fluids. In this work, RMS is explored to monitor the process of Mesenchymal Stem Cell (MSC) differentiation into chondrocytes in vitro, providing a holistic mol. picture of cellular events governing the differentiation. Spectral signatures of the subcellular compartments, nucleolus, nucleus and cytoplasm were initially probed and characteristic mol. changes between differentiated and undifferentiated were identified. Moreover, high d. cell micromasses were cultured over a period of three weeks, and a systematic monitoring of cellular mol. components and the progress of the ECM formation, associated with the chondrogenic differentiation, was performed. This study shows the potential applicability of RMS as a powerful tool to monitor and better understand the differentiation pathways and process. The experimental process involved the reaction of 5-Methylpyrimidine-2,4(1H,3H)-dione(cas: 65-71-4).Electric Literature of 65-71-4

The Article related to chondrogenic stem cell differentiation raman microspectroscopy, Biochemical Methods: Spectral and Related Methods and other aspects.Electric Literature of 65-71-4

Referemce:
Pyrimidine | C4H4N2 – PubChem,
Pyrimidine – Wikipedia

On December 31, 2020, Dementjev, Andrej; Rutkauskas, Danielis; Polovy, Ivan; Macernis, Mindaugas; Abramavicius, Darius; Valkunas, Leonas; Dovbeshko, Galina published an article.Application of 65-71-4 The title of the article was Characterization of thymine microcrystals by CARS and SHG microscopy. And the article contained the following:

Identification of chem. homologous microcrystals in a polycrystal sample is a big challenge and requires developing specific highly sensitive tools. Second harmonic (SHG) and coherent anti-Stokes Raman scattering (CARS) spectroscopy can be used to reveal arrangement of thymine mols., one of the DNA bases, in microcrystalline sample. Strong dependence of CARS and SHG intensity on the orientation of the linear polarization of the excitation light allows to obtain high resolution images of thymine microcrystals by addnl. utilizing the scanning microscopy technique. Exptl. findings and theor. interpretation of the results are compared. Presented exptl. data together with quantum chem.-based theor. interpretation allowed us to determine the most probable organization of the thymine mols. The experimental process involved the reaction of 5-Methylpyrimidine-2,4(1H,3H)-dione(cas: 65-71-4).Application of 65-71-4

The Article related to thymine microcrystal structure cars second harmonic generation microscopy, Biochemical Methods: Spectral and Related Methods and other aspects.Application of 65-71-4

Referemce:
Pyrimidine | C4H4N2 – PubChem,
Pyrimidine – Wikipedia

On March 3, 2020, Zhang, Yi; Xiao, Jing-Yu; Zhu, Yuan; Tian, Li-Jiao; Wang, Wei-Kang; Zhu, Ting-Ting; Li, Wen-Wei; Yu, Han-Qing published an article.Application of 65-71-4 The title of the article was Fluorescence Sensor Based on Biosynthetic CdSe/CdS Quantum Dots and Liposome Carrier Signal Amplification for Mercury Detection. And the article contained the following:

Mercury (Hg), as a highly harmful environmental pollutant, poses severe ecol. and health risks even at low concentrations Accurate and sensitive methods for detecting Hg2+ ions in aquatic environments are highly needed. In this work, the authors developed a highly sensitive fluorescence sensor for Hg2+ detection with an integrated use of biosynthetic CdSe/CdS quantum dots (QDs) and liposome carrier signal amplification. To construct such a sensor, three single-stranded DNA probes were rationally designed based on the thymine-Hg2+-thymine (T-Hg2+-T) coordination chem. principles and by taking advantage of the biocompatibility and facile-modification properties of the biosynthetic QDs. Hg2+ could be determined in a range from 0.25 to 100 nM with a detection limit of 0.01 nM, which met the requirements of environmental sample detection. The sensor also exhibited a high selectivity for Hg2+ detection in the presence of other high-level metal ions. A satisfactory capacity of the sensor for detecting environmental samples including tap water, river water, and landfill leachate was also demonstrated. This work opens up a new application scenario for biosynthetic QDs and holds a great potential for environmental monitoring applications. The experimental process involved the reaction of 5-Methylpyrimidine-2,4(1H,3H)-dione(cas: 65-71-4).Application of 65-71-4

The Article related to fluorescence sensor cadmium selenide sulfide quantum dot liposome mercury, Biochemical Methods: Spectral and Related Methods and other aspects.Application of 65-71-4

Referemce:
Pyrimidine | C4H4N2 – PubChem,
Pyrimidine – Wikipedia

On December 31, 2022, Zhang, Hua; Zhao, Lin; Jiang, Jingjing; Zheng, Jie; Yang, Li; Li, Yanyan; Zhou, Jian; Liu, Tianshu; Xu, Jianmin; Lou, Wenhui; Yang, Weige; Tan, Lijie; Liu, Weiren; Yu, Yiyi; Ji, Meiling; Xu, Yaolin; Lu, Yan; Li, Xiaomu; Liu, Zhen; Tian, Rong; Hu, Cheng; Zhang, Shumang; Hu, Qinsheng; Deng, Yangdong; Ying, Hao; Zhong, Sheng; Zhang, Xingdong; Wang, Yunbing; Wang, Hua; Bai, Jingwei; Li, Xiaoying; Duan, Xiangfeng published an article.Category: pyrimidines The title of the article was Multiplexed nanomaterial-assisted laser desorption/ionization for pan-cancer diagnosis and classification. And the article contained the following:

As cancer is increasingly considered a metabolic disorder, it is postulated that serum metabolite profiling can be a viable approach for detecting the presence of cancer. By multiplexing mass spectrometry fingerprints from two independent nanostructured matrixes through machine learning for highly sensitive detection and high throughput anal., we report a laser desorption/ionization (LDI) mass spectrometry-based liquid biopsy for pan-cancer screening and classification. The Multiplexed Nanomaterial-Assisted LDI for Cancer Identification (MNALCI) is applied in 1,183 individuals that include 233 healthy controls and 950 patients with liver, lung, pancreatic, colorectal, gastric, thyroid cancers from two independent cohorts. MNALCI demonstrates 93% sensitivity at 91% specificity for distinguishing cancers from healthy controls in the internal validation cohort, and 84% sensitivity at 84% specificity in the external validation cohort, with up to eight metabolite biomarkers identified. In addition, across those six different cancers, the overall accuracy for identifying the tumor tissue of origin is 92% in the internal validation cohort and 85% in the external validation cohort. The excellent accuracy and min. sample consumption make the high throughput assay a promising solution for non-invasive cancer diagnosis. The experimental process involved the reaction of 5-(Hydroxymethyl)pyrimidine-2,4(1H,3H)-dione(cas: 4433-40-3).Category: pyrimidines

The Article related to liver lung pancreatic colorectal gastric thyroid cancer diagnosis biomarker, Biochemical Methods: Spectral and Related Methods and other aspects.Category: pyrimidines

Referemce:
Pyrimidine | C4H4N2 – PubChem,
Pyrimidine – Wikipedia

Qin, Zhen; Liu, Jia; Qiu, Bo; Luo, Hai published an article in 2012, the title of the article was Reactive desorption electrospray ionization mass spectrometry of self-assembled quintets of uracil and its homologues.Safety of 6-Methylpyrimidine-2,4(1H,3H)-dione And the article contains the following content:

The authors use reactive desorption electrospray ionization (DESI) to investigate the formation of quintets of uracil and homologs (thymine, 6-methyluracil, 5-ethyluracil, 5,6-dimethyluracil) sep. in the spray solvent and on the surface. Exchange reactions for the subunit(s) of the quintet are observed Furthermore, the different signal distributions of the homo-subunit and hetero-subunit quintets formed from any two of the uracil homologs can be compared by using the values of a specially defined molar ration Rm. The results provide a relative stability order for the quintets formed by each of the homologs, which is in agreement with that obtained by DFT calculations The experimental process involved the reaction of 6-Methylpyrimidine-2,4(1H,3H)-dione(cas: 626-48-2).Safety of 6-Methylpyrimidine-2,4(1H,3H)-dione

The Article related to reactive desorption electrospray ionization mass spectrometry uracil homolog quintet, Biochemical Methods: Spectral and Related Methods and other aspects.Safety of 6-Methylpyrimidine-2,4(1H,3H)-dione

Referemce:
Pyrimidine | C4H4N2 – PubChem,
Pyrimidine – Wikipedia

On July 10, 2020, Qin, Chao; Hu, Xiaojie; Waigi, Michael Gatheru; Yang, Bing; Gao, Yanzheng published an article.HPLC of Formula: 65-71-4 The title of the article was Amino and hydroxy substitution influences pyrene-DNA binding. And the article contained the following:

Polycyclic aromatic hydrocarbon (PAH)-DNA binding is an essential step in PAH-induced carcinogenesis. A large number of PAHs contain substituents, it is unclear whether functional groups will influence the PAH-DNA binding. Here, we investigated amino (-NH2) and hydroxy (-OH) substitution on pyrene-DNA binding. Because of the considerable effects of electrostatic surface potential (ESP), -NH2 substitution significantly facilitated binding by increasing the binding constant (log KA) from 4.14 L mol-1 to 12.31 L mol-1, while -OH substitution inhibited binding by reducing log KA to 3.68 L mol-1. Spectroscopy results revealed that pyrene and its derivatives were able to bind with thymine to induce DNA damage or double helix distortion. Quantum chem. calculations showed that -NH2 substitution induces hydrogen bond formation, thereby enhancing the binding of pyrene with DNA; moreover, binding force changes due to -OH substitution may not be an essential factor. All structural descriptors were not correlated with the quenching constant (KSV) or binding constant, indicating that changes in physicochem. properties shows no influence on pyrene-DNA binding. The results of this study will improve our understanding of the contribution of functional groups to PAH-DNA binding. 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 pyrene dna damage amino hydroxy group substitution, carcinogenesis, dna, functional groups, pahs, Toxicology: Carcinogens, Mutagens, and Teratogens and other aspects.HPLC of Formula: 65-71-4

Referemce:
Pyrimidine | C4H4N2 – PubChem,
Pyrimidine – Wikipedia

Green, James A.; Jouybari, Martha Yaghoubi; Aranda, Daniel; Improta, Roberto; Santoro, Fabrizio published an article in 2021, the title of the article was Nonadiabatic absorption spectra and ultrafast dynamics of DNA and RNA photoexcited nucleobases.Electric Literature of 65-71-4 And the article contains the following content:

We have recently proposed a protocol for Quantum Dynamics (QD) calculations, which is based on a parameterisation of Linear Vibronic Coupling (LVC) Hamiltonians with Time Dependent (TD) D. Functional Theory (TD-DFT), and exploits the latest developments in multiconfigurational TD-Hartree methods for an effective wave packet propagation. In this contribution we explore the potentialities of this approach to compute nonadiabatic vibronic spectra and ultrafast dynamics, by applying it to the five nucleobases present in DNA and RNA. For all of them we computed the absorption spectra and the dynamics of ultrafast internal conversion (100 fs timescale), fully coupling the first 2-3 bright states and all the close by dark states, for a total of 6-9 states, and including all the normal coordinates. We adopted two different functionals, CAM-B3LYP and PBE0, and tested the effect of the basis set. Computed spectra are in good agreement with the available exptl. data, remarkably improving over pure electronic computations, but also with respect to vibronic spectra obtained neglecting inter-state couplings. Our QD simulations indicate an effective population transfer from the lowest energy bright excited states to the close-lying dark excited states for uracil, thymine and adenine. Dynamics from higher-energy states show an ultrafast depopulation toward the more stable ones. The proposed protocol is sufficiently general and automatic to promise to become useful for widespread applications. The experimental process involved the reaction of 5-Methylpyrimidine-2,4(1H,3H)-dione(cas: 65-71-4).Electric Literature of 65-71-4

The Article related to dna rna photoexcitation nucleobase absorption spectra, nonadiabatic interactions, nucleobases, photoinduced processes, quantum dynamics, vibronic spectra, Biochemical Methods: Spectral and Related Methods and other aspects.Electric Literature of 65-71-4

Referemce:
Pyrimidine | C4H4N2 – PubChem,
Pyrimidine – Wikipedia

On November 30, 2009, Kim, S. A.; Lee, Y. M.; Hwang, I. G.; Kang, D. H.; Woo, G. J.; Rhee, M. S. published an article.Recommanded Product: 5-(3,4,5-Trimethoxybenzyl)pyrimidine-2,4-diamine 2-hydroxypropanoate The title of the article was Eight enrichment broths for the isolation of Campylobacter jejuni from inoculated suspensions and ground pork. And the article contained the following:

Aims: The efficiency of eight enrichment broths for the selective isolation of Campylobacter jejuni was compared to identify an optimal enrichment broth. Methods and Results: Brucella-FBP, Preston, Doyle and Roman, modified CCD (mCCD), Park and Sanders, Bolton, Hunt and Radle and Hunt broths were compared for their recovery of (i) Camp. jejuni in suspension, (ii) Camp. jejuni from inoculated ground pork, (iii) heat-injured Camp. jejuni (55°C for 20 min) in suspension and (iv) heat-injured Camp. jejuni from inoculated ground pork. Hunt broth and Bolton broth showed the highest and most rapid enrichment efficacy for the cell suspensions and ground pork, resp. Preston, Park and Sanders and mCCD broths had relatively high enrichment efficiencies, while Brucella-FBP broth was significantly inferior to the other broths (P < 0.05). Conclusions: Cell recovery from the eight enrichment broths was dependent on the sample type and the state of the cells. The use of the appropriate broth is important for the rapid and efficacious enrichment of Camp. jejuni. In particular, heat-injured Camp. jejuni require a longer cultivation time and a suitable enrichment broth. Significance and Impact of the Study: The results from the present study provide information for selecting the most appropriate enrichment broth for Camp. jejuni and may contribute to improved detection methods for the organism. The experimental process involved the reaction of 5-(3,4,5-Trimethoxybenzyl)pyrimidine-2,4-diamine 2-hydroxypropanoate(cas: 23256-42-0).Recommanded Product: 5-(3,4,5-Trimethoxybenzyl)pyrimidine-2,4-diamine 2-hydroxypropanoate

The Article related to meat pork campylobacter broth food contamination, Food and Feed Chemistry: Contaminants and Toxicants and other aspects.Recommanded Product: 5-(3,4,5-Trimethoxybenzyl)pyrimidine-2,4-diamine 2-hydroxypropanoate

Referemce:
Pyrimidine | C4H4N2 – PubChem,
Pyrimidine – Wikipedia

On May 8, 2020, Yan, Tzu-Hsien; Lin, Yi-Hsin; Huang, Chao-Wei published a patent.Related Products of 160377-42-4 The title of the patent was Compound with pyridine ring, synthetic method and application as light-emitting element. And the patent contained the following:

The invention disclosed a kind of pyridine containing compound, its preparation method and application as light-emitting element in OLED. The claimed compound is shown in structure I (ring A and the ring B = (un)substituted pyridine ring; A1,A2 = same or different organic groups; R1,R2 = same or different substituent groups; m,n = 0, 1, 2 or 3). The claimed compound is prepared via coupling etc. multiple steps (procedure given). The prepared compound can be applied as electron transport layer material with good electron mobility. The experimental process involved the reaction of 5-(4-Bromophenyl)pyrimidine(cas: 160377-42-4).Related Products of 160377-42-4

The Article related to pyridine derivative preparation coupling electron transport oled, Heterocyclic Compounds (One Hetero Atom): Pyridines and other aspects.Related Products of 160377-42-4

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Pyrimidine | C4H4N2 – PubChem,
Pyrimidine – Wikipedia

On January 14, 2010, Bertram, Lisa Sarah; Fyfe, Matthew Colin Thor; Jeevaratnam, Revathy Perpetua; Keily, John; Krulle, Thomas Martin; Rasamison, Chrystelle Marie; Sambrook-Smith, Colin Peter; Swain, Simon Andrew published a patent.Related Products of 596114-50-0 The title of the patent was Piperidinyl compounds as GPCR agonists and their preparation, and use in the treatment of diabetes and obesity. And the patent contained the following:

The invention relates to compounds of formula I or pharmaceutically acceptable salts thereof, are GPCR agonists and are useful as for the treatment of diabetes and obesity. Compounds of formula I wherein Q is CH and N; one of W, Y and Z is N and CH and the others are CR5; R1 is SO2Me and CONH2 and derivatives; R2, R3 and R4 are independently H and Me; n is 0, 1, and 2; R5 is C1-4 alkyl, C1-4 alkoxy, F, Cl, C1-3 fluoroalkyl and Bn; and pharmaceutically acceptable salts thereof, are claimed. Example compound II was prepared by a general procedure (procedure given). All the invention compounds were evaluated for their GPCR agonistic activity (some data given). The experimental process involved the reaction of 2-Chloro-5-isopropylpyrimidine(cas: 596114-50-0).Related Products of 596114-50-0

The Article related to piperidinyl compound preparation gpcr agonist treatment diabetes obesity, Heterocyclic Compounds (One Hetero Atom): Pyridines and other aspects.Related Products of 596114-50-0

Referemce:
Pyrimidine | C4H4N2 – PubChem,
Pyrimidine – Wikipedia