Competing quantum phases of hard-core bosons with tilted dipole-dipole interaction

Abstract This study examined the effect of polyphosphate on removal of endocrine-disrupting chemicals (EDCs) such as nonylphenol and bisphenol-A by activated carbons. It was found that polyphosphate aided in the removal of nonylphenol and bisphenol- A. Polyphosphate reacted with nonylphenol, likely through dipole-dipole interaction, which then improved the nonylphenol removal. Calcium interfered with this reaction by causing competition. It was found that polyphosphate could accumulate on carbon while treating a river. The accumulated polyphosphate then aided nonylphenol removal. The extent of accumulation was dependent on the type of carbon. The accumulation occurred more extensively with the wood-based used carbon than with the coal-based used carbon due to the surface charge of the carbon. The negatively charged wood-based carbon attracted the positively charged calcium-polyphosphate complex more strongly than the uncharged coal-based carbon. The polyphosphate-coated activated carbon was also effective in nonylphenol removal. The effect was different depending on the type of carbon. Polyphosphate readily attached onto the wood-based carbon due to its high affinity for polyphosphate. The attached polyphosphate then improved the nonylphenol removal. However, the coating failed to attach polyphosphate onto the coal-based carbon. The nonylphenol removal performance of the coal-based carbon remained unchanged after the polyphosphate coating.

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Nuclear Magnetic Resonance Spectroscopic Behaviour of Some Selective Natural Flavonoids: A Look Through

Mini-Reviews in Organic Chemistry ◽

10.2174/1570193x16666181224110603 ◽

2020 ◽

Vol 17 (2) ◽

pp. 185-196

Author(s):

Shyamal K. Jash ◽

Dilip Gorai ◽

Lalan C. Mandal ◽

Rajiv Roy

Keyword(s):

Nuclear Magnetic Resonance ◽

Natural Products ◽

Magnetic Resonance ◽

Hard Core ◽

2D Nmr ◽

Vital Role ◽

Spectral Technique ◽

Nmr Techniques ◽

Significant Class ◽

Nuclear Magnetic

Flavonoids are considered as a significant class of compounds among the natural products, exhibiting a variety of structural skeletons as well as multidirectional biological potentials. In structural elucidations of natural products, Nuclear Magnetic Resonance (NMR) spectroscopy has been playing a vital role; the technique is one of the sharpest tools in the hands of natural products chemists. The present resume deals with hard-core applications of such spectral technique, particularly in structural elucidation of flavonoids; different NMR techniques including 1H-NMR, 13C-NMR, and 2D-NMR [viz. 1H-1H COSY, COLOC, HMBC, HMQC] are described in detail.

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An American Dream

Public Voices ◽

10.22140/pv.269 ◽

2017 ◽

Vol 6 (2-3) ◽

pp. 123

Author(s):

R. J. Hansen

Keyword(s):

American Dream ◽

New Technology ◽

Hard Core ◽

Fictional Characters

Malfunctioning of new technology causes mass confusion at the ballot box on the Election Day: people vote for fictional characters, actors who play them, and dead presidents; hard-core Republicans find themselves voting for Democratic candidates and proud liberals give their votes to representatives of the GOP.

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