103 results for search term: covid-9 in Published Dates: Last week
Category:
Chemical Engineering and Industrial Chemistry
, Title:
Room-Level Ventilation in Schools and Universities
, Authors:
V. Faye McNeill, Richard Corsi, J. Alex Huffman, Do Young Maeng, Cathleen King, Robert Klein, Michael Lamore, Shelly Miller, Nga Lee Ng, Paula Olsiewski, Krystal Pollitt, Rachel Segalman, Alex Sessions, Todd Squires, Sabrina Westgate
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Ventilation is of primary concern for maintaining healthy indoor air quality and reducing the spread of airborne infectious disease, including COVID1,878
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Category:
Materials Science
, Title:
Lipid-Head-Polymer-Tail Chimeric Nanovesicles
, Authors:
Kan Hu, Aoyuan Cheng, Dingcheng Zhou, Yi Luo, Guoqing Zhang
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One recent example is the widely distributed mRNA Covid39
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Category:
Organic Chemistry
, Title:
TADF/RTP OLED organic emitters based on concaved N-PAHs with tunable intrinsic D-A electronic structure
, Authors:
Jakub Wagner, Paola Zimmermann Crocomo, Michał Kochman, Adam Kubas, Przemysław Data, Marcin Lindner
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By varying the electron-accepting ability of the phenazine terminus, we are able to tune the PLQY of the given compounds in a range from 9372
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Category:
Biological and Medicinal Chemistry
, Title:
Tuaimenal A, a meroterpene from the Irish deep-sea soft coral <i>Drifa</i> sp., displays antiviral and antiproliferative bioactivity.
, Authors:
Nicole E. Avalon, Jordan Nafie, Tracess Smalley, Carolina De Marco Verissimo, Sarah G. Dietrick, Ryan M. Young, Luke C. Warrensford, Amanda R. Pittman, Fiona L. Kearns, Jennifer M. Binning, John P. Dalton, Mark P. Johnson, H. Lee Woodcock, A. Louise Allcock, Bill J. Baker
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NMR Spectroscopic Data (400 MHz, CDCl3) for tuaimenal A (1) pos δC, type δH, mult, J (Hz) HMBC 2 79.1, C 3 132.4, CH 5.80, d (10.1) C-2, C-10, C-12′, C-1′ 4 116.4, CH 6.86, d (10.1) C-2, C-3, C-5, C-9 , C-10 5 107.5, C 6 158.2, C 7 111.7, C 8 151.4, C 9 132.3, C 10 118.7, C 11 191.1, CH 10.08, s C-5, C-6, C-7 12 7.6, CH3 2.14, s C-6, C-7, C-8 1′ 40.2, CH2 1.78, 2.12, ova m C-3, C-2′, C-3′ 2′ 22.6, CH2 1.76, 2.13, ov m 3′ 123.3, CH 5.11, ov t C-2′, C-5′, C-11′ 4′ 135.8, C 5′ 39.6, CH2 1.99, ov t C-3′, C-4′, C-6′, C-11′ 6′ 26.6, CH2 2.05, ov m C-4′, C-5′, C-7′, C-8′ 7′ 124.1, CH 5.07, ov t C-10′ 8′ 131.4, C 9 ′ 25.7, CH3 1.68, s C-7′, C-8′, C-10′ 10′ 17.7, CH3 1.59, s C-7′, C-8′, C-9304
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Category:
Analytical Chemistry
, Title:
How Impurities Responsible for Recalls Emerge in Hand Sanitizers
, Authors:
Farsheed Shahbazi-Raz, Neda Mashhadi, Bukola R. Aremu, Paul Tucci, Justin Binder, John F. Trant
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Humectants, such as Glycerol, are widely employed to prevent skin dehydration, extending the time it takes for alcohol to evaporate and boosts its biocidal activity.9 Emollients and moisturizers, like aloe vera, help to replenish part of the water lost from the skin. Hydrogen peroxide (H2O2) is recommended by the WHO as an antiseptic to eliminate bacterial spores that might be introduced during manufacture.6, 10 Raw materials destined for the pharmaceutical and food industries must typically meet minimum quality criteria, such as those defined in monographs published by the Food Chemicals Codex (FCC) and the United States Pharmacopeia (USP). During the COVID78
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Category:
Earth, Space, and Environmental Chemistry
, Title:
Quantifying community-wide antimicrobials usage via wastewater-based epidemiology
, Authors:
Elizabeth Holton, Natalie Sims, Kishore Jagadeesan, Richard Standerwick, Barbara Kasprzyk-Hordern
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., Comparing illicit drug use in 19 European cities through sewage analysis. The Science of the total environment, 2012. 432: p. 432-9 . 7. Baz-Lomba, J.A., et al., Comparison of pharmaceutical, illicit drug, alcohol, nicotine and caffeine levels in wastewater with sale, seizure and consumption data for 8 European cities. BMC Public Health, 2016. 16(1): p. 1035. 8. Reid, M., et al., Analysis and Interpretation of Specific Ethanol Metabolites, Ethyl Sulfate, and Ethyl Glucuronide in Sewage Effluent for the Quantitative Measurement of Regional Alcohol Consumption. Alcoholism, clinical and experimental research, 2011. 35: p. 1593-9 . 98
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Category:
Analytical Chemistry
, Title:
Disposable spectrofluidic devices for attenuated total reflection infrared spectroscopy: characterization sensitivity, spatial resolution and generally applicable to multiple device types
, Authors:
Nan Jia, Arthur Daignault Bouchard, Tianyang Deng, Leon Torres de Oliveira, André Bégin-Drolet, Jesse Greener
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This was expected from previous studies due to a combination of the Gaussian IR beam profile provided by the spectrometer and the presence of some constant background signal reaching the detector.9 Figure 5. a) Schematic of the multichannel co-flow device assay device with alignment marks. (b) Image of the multichannel co-flow device. (c) Results from flow simulation. (d) Profile of absorbance peak intensity at 1072 cm-1 of disodium phosphate. The ATR ridge direction was perpendicular to the aperture. A 9 channel spectrofluidic assay device In the next example, we demonstrate a spectrofluidic device, which aligns the channels with the direction of the ATR ridges, for conducting assay experiments. The microchannel feature layer contained 96
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Category:
Organic Chemistry
, Title:
Synthesis, Reactivity, and Properties of Benz[a]azulenes via [8 + 2] Cycloaddition of 2H-cyclohepta[b]furan-2-ones with an Enamine
, Authors:
Taku Shoji, Akari Yamazaki, Ryuzi Katoh, Konomi Shimamura, Rina Sakai, Masafumi Yasunami, Tetsuo Okujima, Shunji Ito
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Electrochemical reduction of 25 at −1.60 V resulted in the disappearance of the absorption bands between 450–700 nm with an isosbestic point at λ = 445 nm accompanied by the appearance of a new band at 500 nm (Figure 9 , top). The reverse oxidation of the reduced species for 25 regenerated the original absorption band with a recovery ratio of 73% (Figure 9 , bottom). As with 9 and 22, the cyclohexenone moiety serves as an electron-withdrawing group, so the reversibility of 25 might also be derived from the formation of stable anionic species, followed by the reactions under the electrochemical reduction conditions. Figure 962
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Category:
Materials Science
, Title:
Periplasmic bacterial biomineralization of copper sulfide nanoparticles
, Authors:
Yeseul Park, Zohar Eyal, Péter Pekker, Daniel M. Chevrier, Christopher T. Lefèvre, Pascal Arnoux, Jean Armengaud, Caroline L. Monteil, Assaf Gal, Mihály Pósfai, Damien Faivre
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Komeili, https://biorxiv.org/content/10.1101/2020.01.10.902569v1 (2020). 35 9 16. W. Bae, W, R. K. Mehra, Properties of glutathione- and phytochelatin-capped CdS 1 bionanocrystallites. J. Inorg. Biochem. 69, 33–43 (1998). 2 17. D. T. Rickard, Covellite formation in low temperature aqueous solutions. Mineralium 3 Deposita 7, 180–188 (1972). 4 18. R. J. Goble, COPPER SULFIDES FROM ALBERTA: YARROWITE CU9S8 AND 5 SPIONKOPITE CU39S28. Canad. Mineral. 18, 511–518 (1980). 6 19. D. A. Islam, A. Chakraborty, B. Bhattacharya, U. Sarkar, H. Acharya, Tailored synthesis 7 of CuS nanodisks from a new macrocyclic precursor and their efficient catalytic properties 8 on methylene blue dye degradation. J. Nanopart. Res. 18, 114 (2016). 9103
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Category:
Catalysis
, Title:
Not that innocent – ammonium ions boost homogeneous light-driven hydrogen evolution
, Authors:
Magdalena Heiland, Ratnadip De, Sven Rau, Benjamin Dietzek-Ivanšić, Carsten Streb
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In the presence of Et4N+, HER-activity is reduced by ~ 96 % (based on TONs) compared with the NH4 +-containing system. This indicates that the observed effect is controlled by proton concentration in solution. Figure 2: Turnover numbers (TONs) over time. (A) In methanol:water 9 :1 (v:v) at pH=6 adjusted with aqueous NH4OH or NEt4OH solution, (C) in acetone:water 9 :1 (v:v) at pH=6 adjusted with aqueous NH4OH or NEt4OH solution, (D) in methanol:water 913
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