Category: 101-84-8

I found the field of Science & Technology – Other Topics very interesting. Saw the article Co-exposure risks of pesticides residues and bacterial contamination in fresh fruits and vegetables under smallholder horticultural production systems in Tanzania published in 2020.0. Category: ethers-buliding-blocks, Reprint Addresses Kapeleka, JA (corresponding author), Nelson Mandela African Inst Sci & Technol NM AIST, Arusha, Tanzania.; Kapeleka, JA (corresponding author), Trop Pesticides Res Inst TPRI, Arusha, Tanzania.. The CAS is 101-84-8. Through research, I have a further understanding and discovery of Diphenyl oxide

This study was carried out to investigate the risks of simultaneous exposure to pesticide residues and bacteria contaminants in locally produced fresh vegetables and vegetables in Tanzania. A total of 613 samples were analyzed for pesticide residues, out of which 250 were also analyzed for bacterial contamination. Overall, 47.5% had pesticide residues, 74.2% exceeded Maximum Residue Levels (MRLs). Organophosphorus (95.2%), organochlorines (24.0%), pyrethroids (17.3%), and carbamates (9.2%) residues dominated. MRL values were mostly exceeded in tomatoes, onions, watermelons, cucumbers, Chinese cabbage, and sweet paper. Tetramethrin (0.0329-1.3733 mg/kg), pirimiphos-methyl (0.0003-1.4093 mg/kg), permethrin (0.0009-2.4537 mg/kg), endosulfan (beta) (0.0008-2.3416 mg/kg), carbaryl (0.0215-1.5068 mg/kg), profenofos (0.0176-2.1377 mg/kg), chlorpyrifos (0.0004-1.2549 mg/kg) and dieldrin (0.0011-0.5271 mg/kg) exceeded MRLs. The prevalence of bacteria contamination was high (63.2%). Enterobacter (55.6%) Pseudomonas aeruginosa (32.4%), E. coli (28.2%), Citrobacter (26.8%), Klebsiella oxytoca (14.8%), and Salmonella (7.7%) were isolated. Furthermore, 46.4% tested positive for both pesticide residues and bacterial contaminants. Vegetables from farms (60.7%) contained more dual contaminants than market-based vegetables (41.8%). This may have resulted from excessive pesticide use and unhygienic handling of fresh fruits and vegetables at production level. Binary logistic regression showed that fresh fruits and vegetables with pesticide residues were 2.231 times more likely to have bacteria contaminants (OR: 2.231; 95% CI: 0.501, 8.802). The contamination levels of pesticide residues and bacterial contaminants could be perceived as a serious problem as most fresh fruits and vegetables recorded values of pesticide residues far above the MRLs with pathogenic bacteria isolated in higher proportions. MRLs was higher in most vegetables consumed raw or semi-cooked such as watermelons, carrots, cucumber, tomatoes, onion and sweet paper. There is an urgent need to develop pesticide monitoring and surveillance systems at farmer level, educating farmers and promoting the use of greener pesticides to mitigate the health effects of pesticides and bacterial contaminants.

About Diphenyl oxide, If you have any questions, you can contact Kapeleka, JA; Sauli, E; Sadik, O; Ndakidemi, PA or concate me.. Category: ethers-buliding-blocks

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In 2019.0 ENVIRON INT published article about POLYBROMINATED DIPHENYL ETHERS; PERSISTENT ORGANIC POLLUTANTS; INDOOR DUST; ASSOCIATION; PROFILE; SAMPLES in [Ongono, Jeanne Sandrine; Dow, Courtney; Gambaretti, Juliette; Severi, Gianluca; Boutron-Ruault, Marie-Christine; Bonnet, Fabrice; Fagherazzi, Guy; Mancini, Francesca Romana] Univ Paris Saclay, CESP, Fac Med, Univ Paris Sud,UVSQ,INSERM, F-94805 Villejuif, France; [Ongono, Jeanne Sandrine; Dow, Courtney; Gambaretti, Juliette; Severi, Gianluca; Boutron-Ruault, Marie-Christine; Fagherazzi, Guy; Mancini, Francesca Romana] Gustave Roussy, F-94805 Villejuif, France; [Bonnet, Fabrice] Univ Rennes 1, CHU Rennes, Dept Endocrinol Diabetol & Nutr, Rennes, France in 2019.0, Cited 34.0. The Name is Diphenyl oxide. Through research, I have a further understanding and discovery of 101-84-8. HPLC of Formula: C12H10O

Introduction: The prevalence of type 2 diabetes (T2D) is increasing worldwide. Recent studies have suggested that environmental factors, such as exposure to brominated flame retardants (BFRs), could play a role in the epidemic of T2D. The aim of this study was to analyze the association between the dietary exposure to BFRs (Hexabromocyclododecane (HBCD) and Polybromodiphenylether (PBDE)) and T2D risk in the E3N prospective cohort of French women. Research design and methods: Overall, 71,415 women followed for 19 years were included in the study. We performed Cox regression models to analyze the association between dietary exposure to BFRs and T2D risk. Results: Overall 71,415 women were included and 3667 (5.13%) developed a T2D during follow-up. The mean dietary exposure to HBCD and to PBDE was 0.22 ng/kg body weight (BW)/day and 1.21 ng/kg bw/day, respectively. There was a positive linear association between dietary exposure to HBCD and T2D risk starting from the 2nd quintile group (HR: 1.18; 95% CI: 1.06-1.30) to the 5th quintile group (HR: 1.47; 95% CI: 1.29-1.67) when compared to the 1st quintile group. We also found positive although non-linear associations between dietary exposure to PBDE and T2D risk, with an increased HR only for the 2nd and 4th vs. 1st quintile groups (HR: 1.12; 95% CI: 1.02-1.24, and HR: 1.20; 95% CI: 1.08-1.34, respectively). Conclusion: The findings suggest an association between dietary exposure to BFRs and T2D risk, highlighting the importance of further investigating this association the long-term health effects of endocrine disruptors in the general population. Additional studies are needed to reproduce these findings in other populations and clarify the underlying biological mechanisms.

About Diphenyl oxide, If you have any questions, you can contact Ongono, JS; Dow, C; Gambaretti, J; Severi, G; Boutron-Ruault, MC; Bonnet, F; Fagherazzi, G; Mancini, FR or concate me.. HPLC of Formula: C12H10O

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An article Levels and sources of PBDEs and PCBs in human nails from e-waste, urban, and rural areas in South China WOS:000560533900008 published article about POLYBROMINATED DIPHENYL ETHERS; POLYCHLORINATED-BIPHENYLS PCBS; ORGANOPHOSPHATE FLAME RETARDANTS; HUMAN HAIR; CHIRAL SIGNATURES; HUMAN EXPOSURE; INDOOR DUST; SERUM; BIOTRANSFORMATION; CONTAMINANTS in [Meng, Hua-Jun; Tang, Bin; Zheng, Jing; Ma, She-Xia; Cai, Feng-Shan; Zhuang, Xi; Yu, Yun-Jiang] Minist Ecol & Environm, South China Inst Environm Sci, State Environm Protect Key Lab Environm Pollut Hl, Guangzhou 510655, Peoples R China; [Meng, Hua-Jun; Zheng, Jing; Wang, Jun-Li] Guizhou Med Univ, Sch Publ Hlth, Key Lab Environm Pollut & Dis Monitoring, Minist Educ, Guiyang 550000, Peoples R China in 2020.0, Cited 30.0. The Name is Diphenyl oxide. Through research, I have a further understanding and discovery of 101-84-8. Category: ethers-buliding-blocks

Human nails have been increasingly used as a biomarker for human exposure to persistent organic pollutants (POPs). In the present study, the fingernails of e-waste-dismantling workers from Longtang town, Qingyuan city, rural residents from Shijiao town, Qingyuan city, and urban residents from Guangzhou city, respectively, were collected from South China to monitor the human burdens of polybrominated diphenyl ether (PBDEs) and polychlorinated biphenyl (PCBs). The median concentrations of Sigma PBDEs in the nails of the e-waste-dismantling workers, and urban and rural residents were 412, 129, and 82.1 ng g(-1), respectively, and the median concentrations of Sigma(20)PCBs were 108, 8.4, and 22.1 ng g(-1), respectively. The levels of PCBs and PBDEs in the nails of e-waste-dismantling workers were significantly higher as compared to those for urban and rural residents (p< 0.05), implying the continuous and greater exposure to these chemicals in the e-waste recycling areas. BDE 209 (92-98%) was the major congener of PBDEs and CB 52 (26-51%) was the main congener of PCB in nail samples. However, no significant gender difference was observed for PBDE and PCB levels in nails from all three investigated areas, and no significant correlation was found between their levels and the age of the participants. The enantiomer fractions (EFs) of CBs 95 and 132 indicated that the external sources (e.g.dust and/or air) were the primary sources for CBs 95 and 132 in human nails from the e-waste area, while the contribution from the internal sources (e.g.serum) could be in a small percentage. The results of this study indicate that human nails can be used as a proper indicator of human exposure to PCBs and PBDEs, and further studies are needed by a comprehensive investigation of the relationships between the PCB and PBDE levels in the nails and serum and/or other internal tissues. Category: ethers-buliding-blocks. About Diphenyl oxide, If you have any questions, you can contact Meng, HJ; Tang, B; Zheng, J; Ma, SX; Cai, FS; Zhuang, X; Wang, JL; Yu, YJ or concate me.

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An article Comparative evaluation of river chemical status based on WFD methodology and CCME water quality index WOS:000579365600112 published article about POLYCYCLIC AROMATIC-HYDROCARBONS; MUNICIPAL WASTE-WATER; LOWER NESTOS RIVER; GROUNDWATER QUALITY; PESTICIDE-RESIDUES; ORGANIC POLLUTANTS; RISK-ASSESSMENT; SURFACE WATERS; HEAVY-METALS; FRAMEWORK in [Gikas, G. D.; Sylaios, G. K.; Boskidis, I] Democritus Univ Thrace, Sch Engn, Dept Environm Engn, Lab Ecol Engn & Technol, Xanthi 67100, Greece; [Tsihrintzis, V. A.] Natl Tech Univ Athens, Ctr Assessment Nat Hazards & Proact Planning, Sch Rural & Surveying Engn, Athens 15780, Greece; [Tsihrintzis, V. A.] Natl Tech Univ Athens, Dept Infrastruct & Rural Dev, Lab Reclamat Works & Water Resources Management, Sch Rural & Surveying Engn, Athens 15780, Greece; [Konstantinou, I. K.; Albanis, T.] Univ Ioannina, Dept Chem, Ioannina 45110, Greece in 2020.0, Cited 87.0. The Name is Diphenyl oxide. Through research, I have a further understanding and discovery of 101-84-8. Recommanded Product: 101-84-8

The Water Framework Directive (WFD) methodology, proposed by the Ministry of Environment and Energy of Greece (WFD-MEEG), and the Canadian Council of Ministers of Environment Water Quality Index (CCME-WQI) are comparatively applied to evaluate the chemical status of a major transboundary river. Water quality parameters were monitored at 11 sites along the main stream of the river and its main tributaries, and at five sites in the reservoirs, on a monthly frequency, in the period from May 2008 to May 2009. Water temperature (T), dissolved oxygen (DO), pH, and electrical conductivity (EC) were measured in-situ, while water samples were collected for the determination of total suspended solids (TSS), biochemical oxygen demand (BOD), chemical oxygen demand (COD), nitrite-, nitrate- and ammonium-nitrogen, total Kjeldahl nitrogen (TKN), ortho-phosphates (OP), total phosphorus (TP), and chlorophyll-a (Chl-a). The water samples were also analyzed for the determination of seven heavy metals (i.e., Cd, Pb, Hg, Ni, Cr, Cu, Zn) and 33 priority substances, as listed in Annex II of EU Directive 2008/105/EC. The results showed that the physicochemical parameters (i.e., T. DO, pH, EC, inorganic nitrogen, MN, OP, TP, TSS, and Chia) were within the natural range. The mean concentration of the measured heavy metals did not exceed the limits set by WHO (2003, 2017) for drinking water. Regarding the priority substances, some of them ( i.e., anthracene, fluoranthene, and polyaromatic hydrocarbons) were measured in various stations at higher concentrations than the Annual Average Environmental Quality Standards (AA-EQS). Based on the WFD-MEEG methodology, the river water was in the ‘good’ quality class, while according to CCME-WQI the river quality ranged from ‘marginal’ to ‘good’ category. It seems that CCME-WQI is stricter than WFD-MEEG but could be a WQI appropriate for use. (C) 2020 Elsevier B.V. All rights reserved.

Recommanded Product: 101-84-8. About Diphenyl oxide, If you have any questions, you can contact Gikas, GD; Sylaios, GK; Tsihrintzis, VA; Konstantinou, IK; Albanis, T; Boskidis, I or concate me.

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Niu, S; Chen, RW; Zou, Y; Dong, L; Hai, RT; Huang, YR in [Niu, Shan; Hai, Reti] Beijing Univ Chem Technol, Beijing Engn Res Ctr Environm Mat Water Purificat, Beijing 10029, Peoples R China; [Niu, Shan; Dong, Liang; Huang, Yeru] Natl Res Ctr Environm Anal & Measurement, Beijing 100029, Peoples R China; [Chen, Ruiwen] Agilent Technol China Co LTD, Beijing 100102, Peoples R China; [Zou, Yun] Shimadzu China Co LTD, China MS Ctr, Beijing 100020, Peoples R China published Spatial distribution and profile of atmospheric short-chain chlorinated paraffins in the Yangtze River Delta in 2020.0, Cited 55.0. HPLC of Formula: C12H10O. The Name is Diphenyl oxide. Through research, I have a further understanding and discovery of 101-84-8.

Research on the atmospheric occurrence of short chain chlorinated paraffins (SCCPs) in industrialized areas is scarce. In this study, we investigated the concentrations, profile, and spatial distribution of SCCPs in the highly industrialized and developed areas of the Yangtze River Delta (YRD) in China using polyurethane foam passive air samplers. Sampling was performed during two separate periods in 2011. The concentrations of atmospheric SCCPs ranged from 6.1 to 63 ng m(-3) in summer and 6.2-42 ng m(-3) in winter. The C-10 and C-11 groups were the predominant carbon groups in all the samples. Different congener patterns between summer and winter were found, indicating that congeners in the air in winter may be influenced by local and external sources. The highest level of SCCPs was found in Suzhou, which is a highly industrialized area with many manufactories including electronic industries and plastic factories. Higher levels of SCCPs were found in the air than polychlorinated biphenyls (PCBs), organochlorine pesticides (OCPs), and polybrominated diphenyl ether (PBDEs), suggesting that the production and use of SCCPs were much higher than prohibited or restricted persistent organic pollutants (e.g., PCBs, OCPs, and PBDEs). Future studies should investigate the different sources of atmospheric SCCPs by conducting a comprehensive assessment of SCCP exposure. (C) 2020 Elsevier Ltd. All rights reserved.

HPLC of Formula: C12H10O. About Diphenyl oxide, If you have any questions, you can contact Niu, S; Chen, RW; Zou, Y; Dong, L; Hai, RT; Huang, YR or concate me.

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Category: ethers-buliding-blocks. In 2019 J ORGANOMET CHEM published article about CROSS-COUPLING REACTION; HIGHLY-ACTIVE CATALYST; ONE-POT SYNTHESIS; MAGNETIC NANOPARTICLES; IONIC-LIQUID; C-N; BOND FORMATION; SUPERPARAMAGNETIC NANOPARTICLES; HETEROGENEOUS CATALYSIS; EFFICIENT CATALYST in [Hajipour, Abdol R.; Khorsandi, Zahra; Metkazini, S. Fatemeh Mohammadi] Isfahan Univ Technol, Dept Chem, Esfahan 84156, Iran; [Hajipour, Abdol R.; Khorsandi, Zahra] Univ Wisconsin, Med Sch, Dept Neurosci, 1300 UniversityAve, Madison, WI 53706 USA in 2019, Cited 70. The Name is Diphenyl oxide. Through research, I have a further understanding and discovery of 101-84-8.

A magnetically robust recyclable nanocatalyst was fabricated by immobilizing of Pd onto the surface of cysteine-functionalized magnetic nanoparticles (MNPs@Cys-Pd). This nanocatalyst was characterized using various techniques such as FT-IR, XRD, TEM, SEM, EDX, VSM, and ICP. The application of catalyst (MNPs@Cys-Pd) was investigated for O-arylation and N-arylation reactions. This phosphine-free complex was found as highly efficient heterogeneous catalyst in green media and mild reaction conditions. In addition, it gave excellent recyclability without significant deactivation after ten cycles. (C) 2019 Published by Elsevier B.V.

Category: ethers-buliding-blocks. About Diphenyl oxide, If you have any questions, you can contact Hajipour, AR; Khorsandi, Z; Metkazini, SFM or concate me.

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In 2019 RSC ADV published article about ONE-POT SYNTHESIS; ARYL HALIDES; ARYLBORONIC ACIDS; C-H; BENZOFURAN DERIVATIVES; OXIDATION; ARYLATION; SALTS; WATER; MILD in [Ye, Lianbao; Han, Chao; Shi, Peiqi; Gao, Wei] Guangdong Pharmaceut Univ, Sch Pharm, Guangzhou 510006, Guangdong, Peoples R China; [Mei, Wenjie] Guangdong Pharmaceut Univ, Guangdong Prov Engn Technol Ctr Mol Probes & Biom, Guangzhou 510006, Guangdong, Peoples R China in 2019, Cited 53. The Name is Diphenyl oxide. Through research, I have a further understanding and discovery of 101-84-8. Safety of Diphenyl oxide

A copper-catalysed hydroxylation of diaryliodoniums to generate phenols and diaryl ethers is reported. This method allows the synthesis of diversely functionalized phenols under mild reaction conditions without the need for a strong inorganic base or an expensive noble-metal catalyst. Significantly, convenient application of diaryliodoniums is demonstrated in the preparation of diaryl ethers in a one-pot operation.

About Diphenyl oxide, If you have any questions, you can contact Ye, LB; Han, C; Shi, PQ; Gao, W; Mei, WJ or concate me.. Safety of Diphenyl oxide

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Ling, JY; Sheng, F; Wang, Y; Peng, AP; Jin, X; Gu, C in [Ling, Jingyi; Sheng, Feng; Wang, Yi; Peng, Anping; Jin, Xin; Gu, Cheng] Nanjing Univ, Sch Environm, State Key Lab Pollut Control & Resource Reuse, Nanjing 210023, Peoples R China published Formation of brown carbon on Fe-bearing clay from volatile phenol under simulated atmospheric conditions in 2020.0, Cited 60.0. Application In Synthesis of Diphenyl oxide. The Name is Diphenyl oxide. Through research, I have a further understanding and discovery of 101-84-8.

Atmospheric brown carbon (BrC) has recently attracted great concerns due to its potential contribution to climate change. It was reported that dissolved Fe(III) species can act as an efficient oxidant to catalyze the polymerization of volatile phenol substances, subsequently forming atmospheric BrC in aerosols. Since Fe in the atmosphere is commonly associated with clay mineral dusts, the transformation of phenol substances on Fe-bearing clay mineral surface is potentially important for BrC formation. In this study, taking guaiacol as the model phenol substance, its brown carbon formation process was investigated on Fe(III) modified montmorillonite under different relative humidities (RHs). The spectroscopic features and compositions of the produced BrC were systematically characterized. The results demonstrated that the interface FeOH2+ is the key species to promote the polymerization of guaiacol, and RH plays a significant role to influence the surface acidity of clay and the gas-to-particle adsorption of guaiacol. The BrC was produced with the most abundance and variety under moderate RH (similar to 33%), while higher RH (similar to 100%) accelerated the polymerization rate. Since aerosol moisture content might not largely influence the hydroxylation states of the surface bearing Fe(III) species, it signifies the importance of clay associated Fe(III) to catalyze the BrC formation in varied conditions Our study highlights the importance of clay mineral dust on the formation of BrC, and reveals the brown carbon formation pathways under environmentally relevant conditions.

About Diphenyl oxide, If you have any questions, you can contact Ling, JY; Sheng, F; Wang, Y; Peng, AP; Jin, X; Gu, C or concate me.. Application In Synthesis of Diphenyl oxide

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Liu, SJ; Bai, LC; van Muyden, AP; Huang, ZJ; Cui, XJ; Fei, ZF; Li, XH; Hu, XL; Dyson, PJ in [Liu, Sijie; van Muyden, Antoine P.; Huang, Zhangjun; Cui, Xinjiang; Fei, Zhaofu; Dyson, Paul J.] Ecole Polytech Fed Lausanne, Inst Chem Sci & Engn ISIC, CH-1015 Lausanne, Switzerland; [Liu, Sijie; Li, Xuehui] South China Univ Technol, State Key Lab Pulp & Paper Engn, Sch Chem & Chem Engn, Guangzhou 510640, Guangdong, Peoples R China; [Bai, Lichen; Hu, Xile] Ecole Polytech Fed Lausanne, LSCI, ISIC, Inst Chem Sci & Engn, CH-1015 Lausanne, Switzerland published Oxidative cleavage of -O-4 bonds in lignin model compounds with a single-atom Co catalyst in 2019.0, Cited 48.0. HPLC of Formula: C12H10O. The Name is Diphenyl oxide. Through research, I have a further understanding and discovery of 101-84-8.

Single-atom catalysts are emerging as primary catalysts for many reactions due to their 100% utilization of active metal centers leading to high catalytic efficiencies. Herein, we report the use of a single-atom Co catalyst for the oxidative cleavage of the -O-4 bonds of lignin model compounds at a low oxygen pressure. Under the optimized reaction conditions, the conversion of 2-(2-methoxyphenoxy)-1-phenylethanol up to 95% with high selectivities was achieved with a variety of substrates investigated. The reusability of the Co catalyst with a high catalytic efficiency indicates its potential application in the oxidative cleavage of C-O bonds.

About Diphenyl oxide, If you have any questions, you can contact Liu, SJ; Bai, LC; van Muyden, AP; Huang, ZJ; Cui, XJ; Fei, ZF; Li, XH; Hu, XL; Dyson, PJ or concate me.. HPLC of Formula: C12H10O

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Ye, LB; Han, C; Shi, PQ; Gao, W; Mei, WJ in [Ye, Lianbao; Han, Chao; Shi, Peiqi; Gao, Wei] Guangdong Pharmaceut Univ, Sch Pharm, Guangzhou 510006, Guangdong, Peoples R China; [Mei, Wenjie] Guangdong Pharmaceut Univ, Guangdong Prov Engn Technol Ctr Mol Probes & Biom, Guangzhou 510006, Guangdong, Peoples R China published Copper-catalyzed synthesis of phenol and diaryl ether derivatives via hydroxylation of diaryliodoniums in 2019, Cited 53. COA of Formula: C12H10O. The Name is Diphenyl oxide. Through research, I have a further understanding and discovery of 101-84-8.

A copper-catalysed hydroxylation of diaryliodoniums to generate phenols and diaryl ethers is reported. This method allows the synthesis of diversely functionalized phenols under mild reaction conditions without the need for a strong inorganic base or an expensive noble-metal catalyst. Significantly, convenient application of diaryliodoniums is demonstrated in the preparation of diaryl ethers in a one-pot operation.

COA of Formula: C12H10O. About Diphenyl oxide, If you have any questions, you can contact Ye, LB; Han, C; Shi, PQ; Gao, W; Mei, WJ or concate me.

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