Month: November 2021

Safety of Diphenyl oxide. I found the field of Biochemistry & Molecular Biology; Chemistry very interesting. Saw the article Fuzzy characterization and classification of solvents according to their polarity and selectivity. A comparison with the Snyder approach published in 2020, Reprint Addresses Sarbu, C (corresponding author), Babes Bolyai Univ, Fac Chem & Chem Engn, Dept Chem, Arany Janos Str 11, RO-400028 Cluj Napoca, Romania.. The CAS is 101-84-8. Through research, I have a further understanding and discovery of Diphenyl oxide.

Advanced chemometric methods, such as fuzzy c-means, a semi-supervised clustering method, and fuzzy discriminant analysis, a robust supervised method, have been successfully applied for characterization and classification of 72 solvents according to the chemical parameters (P’ and x(i)) developed by Snyder. The obtained results (fuzzy partitions) and parameters of the prototypes (robust fuzzy means) clearly demonstrated the efficiency and information power of the advanced fuzzy methods in solvent characterization and classification, and allow a rationale choice of a good solvent or an efficient mixture of solvents in chromatography and other fields. Also, this methodology generates the premises for future investigations using other different properties of solvents.

Safety of Diphenyl oxide. About Diphenyl oxide, If you have any questions, you can contact Guidea, A; Sarbu, C or concate me.

Reference:
Ether – Wikipedia,
,Ether | (C2H5)2O – PubChem

An article Occurrence of PCDD/PCDFs, dioxin-like PCBs, and PBDEs in surface sediments from the Neva River and the Eastern Gulf of Finland (Russia) WOS:000463824600009 published article about POLYBROMINATED DIPHENYL ETHERS; DIBENZO-P-DIOXINS; BROMINATED FLAME RETARDANTS; POLYCHLORINATED-BIPHENYLS; SPATIAL-DISTRIBUTION; BALTIC SEA; PCDD/FS; BIVALVES; BIOACCUMULATION; CONTAMINATION in [Metelkova, Larisa; Zhakovskaya, Zoya; Kukhareva, Galina; Nikiforov, Vladimir] Inst Russian Acad Sci, St Petersburg Sci Res Ctr Ecol Safety, 18 Korpusnaya Str, St Petersburg 197110, Russia; [Rybalko, Alexander] St Petersburg Univ, Univ Embankment 7-9, St Petersburg 199034, Russia; [Nikiforov, Vladimir] Norwegian Inst Air Res NILU, Hjalmar Johansens Gate 14, Tromso, Norway in 2019, Cited 65. The Name is Diphenyl oxide. Through research, I have a further understanding and discovery of 101-84-8. Formula: C12H10O

A total of 26 samples of surface sediments collected in the Neva River (including the St. Petersburg city area) and in the Russian part of the Gulf of Finland were analyzed for 17 polychlorinated dibenzo-p-dioxins, polychlorinated dibenzofurans (PCDD/Fs), 12 dioxin-like polychlorinated biphenyls (dl-PCBs), and 10 polybrominated diphenyl ethers (PBDEs). The concentrations of total PCDD/Fs and dl-PCBs in sediments ranged from <0.05 to 219pgg(-1)d.w. and from 44 to 246,600pgg(-1)d.w. respectively. The total World Health Organization toxic equivalent (WHO-TEQ(PCDD/F + PCB)) values varied between 0.01 and 59.0pgg(-1). In the majority of cases, the PCDD/F and dl-PCB concentrations do not exceed the threshold effect level (TEL) recommended by Helsinki Commission (HELCOM) as quantitative target for the sum of PCDD/Fs and dl-PCBs. The congener profile indicates that combustion is the primary source of PCDD/Fs in most of the studied samples. For the PCBs, the historical use of technical PCB products was identified as the major source. sigma PBDE10 concentrations ranged from 0.004 to 1.8ngg(-1)d.w. The congener profile results show that BDE-47 (tetra-BDE) is the dominant congener in sediment samples. According to the sediment and water quality guidelines established in the EU (PNEC) and in Canada (FEQG), all the samples studied can be classified as lowly contaminated by PBDEs. The sediment concentrations of PCDD/Fs, dl-PCBs, and PBDEs measured in this study were comparable to or lower than those reported for other areas of the Baltic Sea. Formula: C12H10O. About Diphenyl oxide, If you have any questions, you can contact Metelkova, L; Zhakovskaya, Z; Kukhareva, G; Rybalko, A; Nikiforov, V or concate me.

Reference:
Ether – Wikipedia,
,Ether | (C2H5)2O – PubChem

I found the field of Chemistry; Science & Technology – Other Topics; Materials Science very interesting. Saw the article Zeolite hydrothermal conversion in the presence of various cyclic alkylammonium cations and synthesis of nanosized BEA and MFI zeolites published in 2019. HPLC of Formula: C14H14O, Reprint Addresses Tsunoji, N; Sano, T (corresponding author), Hiroshima Univ, Grad Sch Engn, Dept Appl Chem, Higashihiroshima 7398527, Japan.. The CAS is 103-50-4. Through research, I have a further understanding and discovery of Benzyl ether

Zeolite synthesis using faujasite-type (FAU) zeolites as the starting silica/alumina source in the presence of various organic structure-directing agents (OSDAs) with cyclic alkylammonium structures was investigated. The obtained zeolite phases strongly depended on the structure of the OSDA and the Si/Al ratio of the starting FAU. Zeolites with different framework structures, such as BEA, MFI, CHA, and LEV, were obtained. Among the used OSDAs, methylpropylpyrrolidinium, butylmethylpyrrolidinium, and methylpropylpiperidinium effectively produced nanosized BEA and MFI zeolites, whereas dimethylpiperidinium and cyclohexyltrimethylammonium produced CHA and LEV zeolites, respectively. The nanosized MFI and BEA zeolites obtained through zeolite hydrothermal conversion exhibited remarkably smaller particle sizes and higher external surface area as compared to those of the conventional MFI and BEA zeolite samples synthesized using tetrapropylammonium and tetraethylammonium, respectively. We also found that the highly crystalline nanosized BEA and MFI zeolites exhibited better catalytic performance in the dehydration of benzyl alcohol to benzyl ether as compared to the conventional zeolites with large particle sizes. In addition, nanosized MFI zeolites, synthesized using FAU as a starting material and cyclic ammonium compounds, showed catalytic activities superior to those of the nano sized MFI zeolites synthesized from amorphous starting materials and cyclic ammonium compounds.

HPLC of Formula: C14H14O. About Benzyl ether, If you have any questions, you can contact Tanigawa, T; Tsunoji, N; Sadakane, M; Sano, T or concate me.

Reference:
Ether – Wikipedia,
,Ether | (C2H5)2O – PubChem

SDS of cas: 101-84-8. I found the field of Chemistry; Science & Technology – Other Topics very interesting. Saw the article Ni-Catalyzed reductive amination of phenols with ammonia or amines into cyclohexylamines published in 2020.0, Reprint Addresses De Vos, DE (corresponding author), Univ Leuven, KU Leuven, Ctr Membrane Separat Adsorpt Catalysis & Spect cM, Celestijnenlaan 200F,Post Box 2461, B-3001 Heverlee, Belgium.. The CAS is 101-84-8. Through research, I have a further understanding and discovery of Diphenyl oxide.

Phenol and its derivatives, which naturally occur in lignocellulose, can be considered as a renewable feedstock not only for aromatic, but also for alicyclic compounds, such as primary and N-substituted cyclohexylamines. So far, the latter are mostly produced from non-renewable starting materials like benzene via problematic nitration/reduction or cross-coupling routes. Herein, an efficient reductive amination of phenol with ammonia or amines is demonstrated, for the first time without the need for rare and expensive noble metals and without using any additives. Various supported Ni catalysts were screened and we elucidated the influence of the key parameters, including the acid-base properties of the supporting material. Acquired knowledge was then applied to different phenol-ammonia/amine combinations, resulting in the synthesis of various primary, secondary and tertiary cyclohexylamines in fair to very high yields.

SDS of cas: 101-84-8. About Diphenyl oxide, If you have any questions, you can contact Cuypers, T; Morias, T; Windels, S; Marquez, C; Van Goethem, C; Vankelecom, I; De Vos, DE or concate me.

Reference:
Ether – Wikipedia,
,Ether | (C2H5)2O – PubChem

An article Exposure pathways, levels and toxicity of polybrominated diphenyl ethers in humans: A review WOS:000541251900007 published article about BROMINATED FLAME RETARDANTS; POLYCHLORINATED-BIPHENYLS PCBS; THYROID-HORMONE LEVELS; POTENTIAL HEALTH-RISK; WASTE RECYCLING AREA; METABOLITES OH-PBDES; IN-HOUSE DUST; UK HUMAN-MILK; BREAST-MILK; CORD-BLOOD in [Wu, Zhineng; Song, Jie; Li, Huijun; Wu, Weidong] Xinxiang Med Univ, Sch Publ Hlth, Xinxiang 453003, Henan, Peoples R China; [He, Chang] Univ Queensland, QAEHS, Brisbane, Qld 4102, Australia; [Han, Wei] Northeast Agr Univ, Coll Resources & Environm, Harbin 150030, Peoples R China; [Zhang, Yadi] Nankai Univ, Tianjin Key Lab Environm Remediat & Pollut Contro, Key Lab Pollut Proc & Environm Criteria, Coll Environm Sci & Engn,Minist Educ, Tianjin 300350, Peoples R China; [Jing, Xiaohua] Anyang Normal Univ, Sch Chem & Chem Engn, Anyang 455002, Peoples R China in 2020.0, Cited 241.0. The Name is Diphenyl oxide. Through research, I have a further understanding and discovery of 101-84-8. Quality Control of Diphenyl oxide

Polybrominated diphenyl ethers (PBDEs) are extensively used as brominated flame retardants (BFRs) in different types of materials, which have been listed as Persistent Organic Pollutants (POPs) by the Stockholm Convention in 2009 and 2017. Due to their ubiquities in the environment and toxicities, PBDEs have posed great threat to both human health and ecosystems. The aim of this review is to offer a comprehensive understanding of the exposure pathways, levels and trends and associated health risks of PBDEs in human body in a global scale. We systematically reviewed and described the scientific data of PBDE researches worldwide from 2010 to March 2020, focusing on the following three areas: (1) sources and human external exposure pathways of PBDEs; (2) PBDE levels and trends in humans; (3) human data of PBDEs toxicity. Dietary intake and dust ingestion are dominant human exposure pathways. PBDEs were widely detected in human samples, especially in human serum and human milk. Data showed that PBDEs are generally declining in human samples worldwide as a result of their phasing out. Due to the common use of PBDEs, their levels in humans from the USA were generally higher than that in other countries. High concentrations of PBDEs have been detected in humans from PBDE production regions and e-waste recycling sites. BDE-47, -153 and -99 were proved to be the primary congeners in humans. Human toxicity data demonstrated that PBDEs have extensively endocrine disruption effects, developmental effects, and carcinogenic effects among different populations.

About Diphenyl oxide, If you have any questions, you can contact Wu, ZN; He, C; Han, W; Song, J; Li, HJ; Zhang, YD; Jing, XH; Wu, WD or concate me.. Quality Control of Diphenyl oxide

Reference:
Ether – Wikipedia,
,Ether | (C2H5)2O – PubChem

An article Synthesis, Structure, and Reactivity of 5-(Aryl)dibenzothiophenium Triflates WOS:000509077100023 published article about SULFONIUM SALTS; ARYLSULFONIUM SALTS; REDUCTION; ARYLATION; RADICALS; REAGENTS in [Kafuta, Kevin; Korzun, Andre; Boehm, Marvin; Golz, Christopher; Alcarazo, Manuel] Georg August Univ Gottingen, Inst Organ & Biomol Chem, Tammannstr 2, Gottingen, Germany in 2020, Cited 45. The Name is Diphenyl oxide. Through research, I have a further understanding and discovery of 101-84-8. COA of Formula: C12H10O

A synthetic protocol for the preparation of 5-(aryl)dibenzothiophenium salts starting from inexpensive dibenzothiophene S-oxide and simple arenes is reported. The scope of the method regarding the nature of the arene is evaluated, intermediates along the reaction sequence have been trapped, and side-reactions identified. In addition, the X-ray structures of a complete set of these salts are reported and their reactivities studied. Specifically, chemoselective Suzuki coupling is observed at the dibenzothiophenium in the presence of iodides.

About Diphenyl oxide, If you have any questions, you can contact Kafuta, K; Korzun, A; Boehm, M; Golz, C; Alcarazo, M or concate me.. COA of Formula: C12H10O

Reference:
Ether – Wikipedia,
,Ether | (C2H5)2O – PubChem

An article Oxidative cracking of three to five-member ring polycyclic aromatic hydrocarbons in subcritical and supercritical water WOS:000582123000012 published article about UV-FLUORESCENCE SPECTROSCOPY; EXCLUSION CHROMATOGRAPHY COLUMNS; HIGH-TEMPERATURE CHEMISTRY; REACTION-MECHANISMS; CATALYTIC CRACKING; CHEMICAL-REACTIONS; HYDROUS PYROLYSIS; VACUUM RESIDUE; WASTE-WATER; HEAVY OIL in [Daud, Ahmad Rafizan Mohamad; Berrueco, Cesar; Hellgardt, Klaus; Millan, Marcos; Kandiyoti, Rafael] Imperial Coll London, Dept Chem Engn, London SW7 2AZ, England; [Daud, Ahmad Rafizan Mohamad] Univ Teknol MARA Johor, Fac Chem Engn, Pasir Gudang Campus, Masai 81750, Johor, Malaysia in 2021.0, Cited 59.0. Recommanded Product: 101-84-8. The Name is Diphenyl oxide. Through research, I have a further understanding and discovery of 101-84-8

Polycyclic aromatic hydrocarbons (PAH) are refractory structures common in heavy hydrocarbons. Thermal cracking in supercritical water (SCW) is limited but PAH can be completely oxidised if an oxidant is added. By restricting oxidant supply to substoichiometric amounts, this study aims to achieve partial oxidation as a route to useful chemicals, such as mono- and bi-aromatics. Oxidative cracking reactions of anthracene, pyrene and benzo[a]pyrene in subcritical and SCW were studied. PAH conversions well above 90 % were achieved along a fast heating ramp in a batch reactor. This quick initial oxidation took place predominantly in inner rings, weakening the aromatic structure and increasing cracking reactivity. This oxidation-cracking pathway became dominant in the SCW region, producing mostly oxygenated compounds with fewer aromatic rings. On the other hand, competing reactions leading to polymerization were favoured in the subcritical water region. PAH reactivity was found to follow the order anthracene > benzo[a]pyrene > pyrene. (C) 2020 Elsevier B.V. All rights reserved.

About Diphenyl oxide, If you have any questions, you can contact Daud, ARM; Berrueco, C; Hellgardt, K; Millan, M; Kandiyoti, R or concate me.. Recommanded Product: 101-84-8

Reference:
Ether – Wikipedia,
,Ether | (C2H5)2O – PubChem

Recently I am researching about POLYCHLORINATED-BIPHENYLS; ORGANOCHLORINE PESTICIDES; SERUM CONCENTRATIONS; ENVIRONMENTAL CHEMICALS; DISRUPTING CHEMICALS; METABOLIC SYNDROME; GLUCOSE-TOLERANCE; EARLY-PREGNANCY; ADIPOSE-TISSUE; EXPOSURE, Saw an article supported by the National Institutes of Health’s Intramural Research Program at the Eunice Kennedy Shriver National Institute of Child Health and Human Development [HHSN275200800013C, HHSN275200800002I, HHSN27500006, HHSN275200800003IC, HHSN275200800014C, HHSN275200800012C, HHSN275200800028C, HHSN275201000009C, HHSN27500008]; EUNICE KENNEDY SHRIVER NATIONAL INSTITUTE OF CHILD HEALTH & HUMAN DEVELOPMENTUnited States Department of Health & Human ServicesNational Institutes of Health (NIH) – USANIH Eunice Kennedy Shriver National Institute of Child Health & Human Development (NICHD) [ZIAHD008967] Funding Source: NIH RePORTER. Published in PERGAMON-ELSEVIER SCIENCE LTD in OXFORD ,Authors: Rahman, ML; Zhang, CL; Smarr, MM; Lee, S; Honda, M; Kannan, K; Tekola-Ayele, F; Louis, GMB. The CAS is 101-84-8. Through research, I have a further understanding and discovery of Diphenyl oxide. COA of Formula: C12H10O

Background: Persistent organic pollutants (POPs) are linked with insulin resistance and type-2 diabetes (T2D) in the general population. However, their associations with gestational diabetes (GDM) are inconsistent. Objective: We prospectively evaluated the associations of POPs measured in early pregnancy with GDM risk. We also assessed whether pre-pregnancy BMI (ppBMI) and family history of T2D modify this risk. Methods: In NICHD Fetal Growth Study, Singletons, we measured plasma concentration of 76 POPs, including 11 organochlorine pesticides (OCPs), 9 polybrominated diphenylethers (PBDEs), 44 polychlorinated biphenyls (PCBs), and 11 per-and polyfluoroalkyl substances (PFAS) among 2334 healthy non-obese women at 8-13 weeks of gestation. GDM was diagnosed by Carpenter and Coustan criteria. We constructed chemical networks using a weighted-correlation algorithm and examined the associations of individual chemical and chemical networks with GDM using multivariate Poisson regression with robust variance. Results: Higher concentrations of PCBs with six or more chlorine atoms were associated with increased risk of GDM in the overall cohort (risk ratios [RRs] range: 1.08-1.13 per 1-standard deviation [SD] increment) and among women with a family history of T2D (RRs range: 1.08-1.48 per 1-SD increment) or normal ppBMI (RRs range: 1.08-1.22 per 1-SD increment). Similar associations were observed for the chemical network comprised of PCBs with >= 6 chlorine atoms and the summary measure of total PCBs and non-dioxin like PCBs (138, 153, 170, 180). Furthermore, four PFAS congeners-perfluorononanoic acid (PFNA), perfluorooctanoic acid (PFOA), perfluoroheptanoic acid (PFHpA), and perfluorododecanoic acid (PFDoDA)-showed significant positive associations with GDM among women with a family history of T2D (RRs range: 1.22-3.18 per 1-SD increment), whereas BDE47 and BDE153 showed significant positive associations among women without a family history of T2D. Conclusions: Environmentally relevant levels of heavily chlorinated PCBs and some PFAS and PBDEs were positively associated with GDM with suggestive effect modifications by family history of T2D and body adiposity status.

About Diphenyl oxide, If you have any questions, you can contact Rahman, ML; Zhang, CL; Smarr, MM; Lee, S; Honda, M; Kannan, K; Tekola-Ayele, F; Louis, GMB or concate me.. COA of Formula: C12H10O

Reference:
Ether – Wikipedia,
,Ether | (C2H5)2O – PubChem

I found the field of Chemistry very interesting. Saw the article Copper-NHC Based Ullmann Catalysis in Water for Selective N-Arylation of 3-Aminophenols published in 2020.0. Quality Control of Diphenyl oxide, Reprint Addresses Gudimetla, VB (corresponding author), Cent Univ Tamil Nadu, Sch Basic & Appl Sci, Dept Chem, Thiruvarur 610005, Tamil Nadu, India.. The CAS is 101-84-8. Through research, I have a further understanding and discovery of Diphenyl oxide

Studies of environmentally benign catalytic methods are of great value in modern chemical synthesis, especially the chemo-selective construction of chemical bonds under green conditions. This work elucidates such preferential synthesis of C-N bond over C-O bond via selective N-arylation of 3-aminophenols using 1,3-bis-[2-hydroxyphenyl] imidazolium chloride (IHPHCl) and copper iodide as catalyst (1 mol %) in aqueous medium. Presence of chelating group (-OH) on IHPHCl enhances N-selectivity. Overall this is a simple and green method for selective N-arylation of 3-aminophenols with good substrate scope and yields (60-88 %). GC-MS, HRMS and other spectroscopic techniques were utilised in detailing the kinetics and mechanistic aspects.

Quality Control of Diphenyl oxide. About Diphenyl oxide, If you have any questions, you can contact Paul, S; Joy, BP; Sasikala, G; Raghuthaman, AG; Gudimetla, VB or concate me.

Reference:
Ether – Wikipedia,
,Ether | (C2H5)2O – PubChem

An article Ru/hydroxyapatite as a dual-functional catalyst for efficient transfer hydrogenolytic cleavage of aromatic ether bonds without additional bases WOS:000486309300022 published article about C-O BONDS; LIGNIN MODEL COMPOUNDS; TRANSFER HYDROGENATION; GAMMA-VALEROLACTONE; LEVULINIC ACID; ARYL ETHERS; BIOMASS; CONVERSION; HYDRODEOXYGENATION; DEPOLYMERIZATION in [Hua, Manti; Song, Jinliang; Xie, Chao; Wu, Haoran; Hu, Yue; Huang, Xin; Han, Buxing] Chinese Acad Sci, Inst Chem, CAS Res Educ Ctr Excellence Mol Sci, CAS Key Lab Colloid & Interface & Thermodynam,Bei, Beijing 100190, Peoples R China; [Hua, Manti; Xie, Chao; Wu, Haoran; Hu, Yue; Huang, Xin; Han, Buxing] Univ Chinese Acad Sci, Sch Chem & Chem Engn, Beijing 100049, Peoples R China; [Song, Jinliang; Han, Buxing] Huairou Natl Comprehens Sci Ctr, Phys Sci Lab, 5 Yanqi East Second St, Beijing 101400, Peoples R China in 2019.0, Cited 51.0. Category: ethers-buliding-blocks. The Name is Diphenyl oxide. Through research, I have a further understanding and discovery of 101-84-8

Cleavage of aromatic ether bonds is a key step for lignin valorization, and the development of novel heterogeneous catalysts with high activity is crucial. Herein, bifunctional Ru/hydroxyapatite has been prepared via ion exchange and subsequent reduction. The obtained Ru/hydroxyapatite could efficiently catalyze the cleavage of various compounds containing aromatic ether bonds via transfer hydrogenolysis without additional bases. Systematic studies indicated that the basic nature of hydroxyapatite and electron-enriched Ru sites resulted in the high activity of the catalyst. A mechanism study revealed that the direct cleavage of aromatic ether bonds was the main reaction pathway.

Category: ethers-buliding-blocks. About Diphenyl oxide, If you have any questions, you can contact Hua, MT; Song, JL; Xie, C; Wu, HR; Hu, Y; Huang, X; Han, BX or concate me.

Reference:
Ether – Wikipedia,
,Ether | (C2H5)2O – PubChem