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    2021-7-8 · ATC is a polyelectrolyte with a high cationic charge density and low molecular weight. The main purpose of using ATC is to eliminate the interference of anionic trash present in the wet-end of papermaking systems. The anionic trash, after being fixed onto fibers and finally “dispersed” in the paper webs, will inevitably affect paper strength.

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    The conventional retention system, using a high charge density cationic polymer along with a high molecular weight anionic polymer only offers a one sided-solution to the expected outcome. The papermaker can achieve a good retention level of fibers, fines, and filler in the suspension, without suffering from the poor dewatering, but may lose ...

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    2016-1-1 · 1.1. Introduction. Lignocellulosic materials are the most promising feedstock as they are natural and renewable resources essential to the function of modern industrial societies (Pérez, Muñoz-Dorado, de la Rubia, & Martínez, 2002).Lignocellulose is the term used to describe the three-dimensional polymeric composites formed by plants as …

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    With the addition of any particle: anionic, cationic, or nonionic, the diameter size and distribution of the electrospun fibers can be significantly reduced, enabling a modification of the fiber diameter for specific applications. Composite nanofibers containing hydroxyapatite and growth factors have also been investigated (Li et al 2006). That ...

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    1. Introduction. For a very long time, the Archaea superkingdom in the tree of life remained a mystery, with a focus on isolates from extreme environments (e.g., extreme heat, salt or acidity), like Pyrolobus fumarii holding the upper temperature limit for life (113 °C; []), Haloquadratum walsbyi, an extreme salt loving photosynthetic organism [] and …

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    2020-2-28 · Non-ionic and cationic hydrophilic grafts have rates of flux decline by NOM fouling ≤50% lower than ungrafted polypropylene. Anionic hydrophilic grafts have initial flux increases up to 140% at high graft yields due to multi-valent ions in the natural water, although the pure-water flux is substantially lower than for the ungrafted membrane.

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  • Total Synthesis of Alkaloid 205B | The Journal of

    2019-5-25 · Concise and highly stereocontrolled total syntheses of racemic and enantiopure frog alkaloid 205B (1) were accomplished in 11 steps from 4-methoxypyridines 6 and 7 in overall yields of 8 and 8%, respectively. The assembly of the core of the natural product relies on a stereoselective Tsuji–Trost allylic amination reaction and a ring-closing metathesis. The synthesis features …

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    2009-11-19 · Chitosan is prepared from chitin, the second most abundant natural polymer in the world. It is primarily composed of glucosamine and N-acetyl glucosamine residues with a 1,4-β-linkage. It can be obtained by deacetylation of chitin, which is produced from shells of crustaceans, insects, and other sources. Chitosan is a nontoxic, …

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    2018-12-4 · Article Anionic Redox Reaction-Induced High-Capacity and Low-Strain Cathode with Suppressed Phase Transition Na 0.72[L i0.24Mn 0.76]O 2, with reversible anionic redox reaction (ARR) and Mn 3+ Mn4+ redox, delivers the highest energy density ( 700 Wh/kg, 270 mAh/g, 1.5– 4.5 V) among all Na cathode materials reported to date, …

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  • Functional and Molecular Characterization of the ...

    1. Introduction. For a very long time, the Archaea superkingdom in the tree of life remained a mystery, with a focus on isolates from extreme environments (e.g., extreme heat, salt or acidity), like Pyrolobus fumarii holding the upper temperature limit for life (113 °C; []), Haloquadratum walsbyi, an extreme salt loving photosynthetic organism [] and …

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  • Synthesis and Characterization of Hollow

    Poly(N-methylaniline) (PNMA) is a polyaniline derivative with a methyl substituent on the nitrogen atom. PNMA is of interest owing to its higher solubility in organic solvents when compared to the unsubstituted polyaniline. However, the electrical conductivity of polyaniline derivatives suffers from chemical substitution. PNMA was synthesized via …

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  • Total Synthesis of Alkaloid 205B | The Journal of

    2019-5-25 · Concise and highly stereocontrolled total syntheses of racemic and enantiopure frog alkaloid 205B (1) were accomplished in 11 steps from 4-methoxypyridines 6 and 7 in overall yields of 8 and 8%, respectively. The assembly of the core of the natural product relies on a stereoselective Tsuji–Trost allylic amination reaction and a ring-closing metathesis. The synthesis features …

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    Sodium n-dodecyl benzene sulfonate (LAS) and sodium dodecyl sulfate (SDS) are popular anionic detergents (surfactants) that are used worldwide and the toxicities of these chemicals have been characterized. We applied these chemicals in a DNA microarray bioassay and determined that the microarray dat …

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    Y 5 Si 3 crystals were prepared by arc-melting high-purity Y and Si sources, following Lu et al. ().A powder x-ray diffraction pattern (fig. S1) revealed the synthesized Y 5 Si 3 as being a single-phase system in the as-cast ingot, with refined lattice parameters [a = 8.4087(1) Å and c = 6.3422(1) Å] that are consistent with those in a previous report (). ...

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    2018-1-5 · An efficient anionic polymerization grafting‐to strategy of poly(2‐vinylpyridine) (P2VP) macro anions for hydrosilylated polystyrene‐block‐polyisoprene is described, leading to highly P2VP‐grafted functional block copolymers.The influence of P2VP grafting is shown to strongly influence the original bulk morphology, leading to easily …

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    2021-3-6 · Anionic phospholipids, which include phosphatidic acid, phosphatidylserine, and phosphoinositides, represent a small percentage of membrane lipids. They are able to modulate the physical properties of membranes, such as their surface charges, curvature, or clustering of proteins. Moreover, by mediating interactions with numerous …

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    2019-8-2 · The paper, “ Inherently self-sterilizing charged multiblock polymers that kill drug-resistant microbes in minutes ,” appears in the journal Materials Horizons. First author of the paper is Bharadwaja S. T. Peddinti, a Ph.D. student at NC State. The paper was co-authored by Mariana Vargas, an undergraduate at NC State; and Steven Smith …

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    2019-11-13 · The polymers were prepared via anionic polymerization technique under high vacuum conditions similar to the one previously reported . About 100 ml of the solvent was collected into the reactor by vacuum distillation, and the monomer was added with the help of an attachable flask.

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  • Meetings - WCDG

    WCDG hosts monthly public meetings from September to May on the 3rd Wednesday of the month, unless otherwise noted. Future Meetings September 2021 - Tongtong Xu, USP (Joint meeting with CSW)October 20, 2021 - Annual Poster Session and Vendor ExhibitionNovember 17, 2021 - TBDDecember 15, 2021 - TBD September , 2021Webinar, …

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    Compositions and methods for production of fatty alcohols using recombinant microorganisms are provided as well as fatty alcohol …

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  • Biochemistry Technology Division Abstracts -

    2013-11-16 · Growth of these bacteria presents many features that represent a real challenge for both monitoring and control. High EPS concentrations in the culture broth cannot be filtered and thus, classical on-line monitoring tools, such as “Flow Injection Analysis” or chromatographic methods, are no longer suitable to follow the fermentation.

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  • Pollution Science 101 - Solutions: August 2016

    2019-2-23 · Water pollution due to effluents from textile dyeing industry is a cause of serious concern. The techniques for detection of dyes are cost intensive and futile because the dyes undergo chemical changes under environmental conditions and the transformation products may be more toxic and carcinogenic than the parent molecule.

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