Xem 1-11 trên 11 kết quả Polyelectrolyte
  • It is shown that the condensation of the polyelectrolyte around the macroion shows a first order phase transition from a dense to a dilute concentration of monomers. The width of the condensed region increases with stronger screening or with smaller macro-ion charges. For small macro-ion charge, or when the Coulomb interactions are strongly screened, no complexation between the polyelectrolyte and the macro-ion happens. Additionally, long polyelectrolyte protrudes both tails and loops from the macroion. This is quite different from the case of large macroions where only tails appear.

    pdf9p thuyliebe 08-10-2018 11 0   Download

  • Trong bài này đề cập đến vấn đề sử dụng polyelectrolyte kết hợp với chất ức chế ăn mòn, có vai trò như là lớp phủ, để tạo thành hệ chống ăn mòn và có khả năng tự phục hồi khi có những tác động bên ngoài làm trầy bề mặt lớp phủ. Chế tạo lớp phủ Daria và các cộng sự đã thực hiện 3 phương pháp phủ đó là: phun khô (spray-drying), phủ quay (spin-coating) và phủ nhún (dip-coating), PEIPSS dùng để phủ, và so sánh 3 phương pháp bằng phổ Ir. Phổ Ir của màng phun khô...

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  • This study has investigated in a comparative fashion the effect of cation, polysaccharide, and Polyelectrolyte on the flocculation dynamics and final properties of both synthetic and activated sludge. The results from experiments indicate that cation, polysaccharide, and Polyelectrolyte could influence sludge floc characteristics as they relate to sludge conditioning. The relationship between polysaccharide and cation concentration was examined at laboratory scale during flocculation with both synthetic and activated...

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  • The present work deals with the leachate treatment using the following processes: coagulation-flocculation by alumina sulfate followed by anionic polyelectrolyte, on one hand. This treatment is preceded by a pretreatment using NaOH and KOH. On the other hand, adsorption by bark Alep pine powder and fibers of date palm leaves is used.

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  • CÁC HÓA CHẤT SỬ DỤNG Clo Chất tạo keo tụ (ferric sulphate) Chất tạo mạng hấp dẫn điện (polyelectrolyte) Chất chống tạo bọt (antifoam) Chất khử oxy (oxygen scavenger) Chất chống ăn mòn (corrosion inhibitor) Chất chống tạo muối (scale inhibitor) Chất diệt khuẩn (biocide)

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  • In the present study intestinal delivery systems resistant to gastric juice, loaded with the probiotic bacteria Lactobacillus acidophilus LA14 and Bifidobacterium lactis BI07, were produced by the polyelectrolyte complexation. First, beads were prepared by the traditional extrusion method and nine formulations were developed using alginate as main carrier and the biopolymer, xanthan gum, as hydrophilic retardant polymer or the cellulose derivative, cellulose acetate phthalateDevelopment of microparticulate systems for intestinal delivery of Lactobacillus acidophilus and Bifidobacterium lactis.

    pdf8p nhoxtom 29-09-2015 57 7   Download

  • The removal of suspended matter from water is one of the major goals of water treatment. Only disinfection is used more often or considered more important. In fact, effective clarification is really necessary for completely reliable disinfection because microorganisms are shielded by particles in the water. Clarification usually involves: • coagulation • flocculation • settling • filtration This guide focuses on coagulation and flocculation: the two key steps which often determine finished water quality....

    pdf41p emyeumoitruong 23-09-2012 70 6   Download

  • Nghiên cứu này đã điều tra trong một thời trang so sánh hiệu quả của các cation, polysaccharide, và Polyelectrolyte vào các động lực kết bông và các tính chất cuối cùng của bùn tổng hợp và kích hoạt cả hai.

    pdf11p phalinh20 22-08-2011 53 4   Download

  • Soft matter (or soft condensed matter) refers to a group of systems that includes polymers, colloids, amphiphiles, membranes, micelles, emulsions, dendrimers, liquid crystals, polyelectrolytes, and their mixtures. Soft matter systems usually have structural length scales in the region from a nanometer to several hundred nanometers and thus fall within the domain of “nanotechnology.” The soft matter length scales are often characterized by interactions that are of the order of thermal energies so that relatively small perturbations can cause dramatic structural changes in them.

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  • The phenomena of charge inversion and effective attraction between the like - charged spherical macromolecules in electrolyte solvent has been studied by using Poisson - Boltzmann mean-field theory, alongside the assumption that counterions condense on the surface of macromolecules to form a strongly correlation liquid.

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  • Poly(3-thiophene acetic acid) (P3TAA) was synthesized using chemical procedures. The structure, surface and morphology of these water-soluble polythiophenes were determined by introducing pH-responsive carboxylic acid groups at the 3-position of thiophene ring and doing FT-IR spectra, SEM and TGA analyses.

    pdf8p tamynhan5 10-12-2020 3 0   Download


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