Water Soluble Nanoparticles from PEG-Based Cationic Hyperbranched Polymer and RNA That Protect RNA from Enzymatic Degradation

2006 ◽  
Vol 7 (5) ◽  
pp. 1386-1388 ◽  
Author(s):  
Jameel Ahmad Khan ◽  
Rajesh Kumar Kainthan ◽  
Munia Ganguli ◽  
Jayachandran N. Kizhakkedathu ◽  
Yogendra Singh ◽  
...  
Keyword(s):  
Hyperbranched Polymer ◽  
Enzymatic Degradation ◽  
Water Soluble

Fluorescence turn-on detection of cyanide anion based on viologen-quenched water-soluble hyperbranched polymer

Polymer ◽  
2013 ◽  
Vol 54 (4) ◽  
pp. 1323-1328 ◽  
Author(s):  
Seongwon Seo ◽  
Daigeun Kim ◽  
Geunseok Jang ◽  
Jongho Kim ◽  
Taek Seung Lee
Keyword(s):  
Hyperbranched Polymer ◽  
Water Soluble ◽  
Cyanide Anion ◽  
Turn On ◽  
Fluorescence Turn On

Synthesis and electrochromic properties of a highly water-soluble hyperbranched polymer viologen

2010 ◽  
Vol 519 (4) ◽  
pp. 1458-1463 ◽  
Author(s):  
Takeshi Sakano ◽  
Fuyuki Ito ◽  
Tomonori Ono ◽  
Osamu Hirata ◽  
Masaaki Ozawa ◽  
...  
Keyword(s):  
Hyperbranched Polymer ◽  
Water Soluble ◽  
Electrochromic Properties

Synthesis and Property of Water-Soluble Hyperbranched Polyacrylate Emulsion

2012 ◽  
Vol 262 ◽  
pp. 460-463
Author(s):  
Yang Yu ◽  
Xiu Lan Xin ◽  
Ya Na Wei ◽  
Hong Qin Liu ◽  
Shao Xiang Yang
Keyword(s):  
Hyperbranched Polymer ◽  
Low Cost ◽  
High Reactivity ◽  
Solid Content ◽  
Water Soluble ◽  
Polymerization Reaction ◽  
Linear Polymers ◽  
Low Viscosity ◽  
Smooth Film ◽  
Type Water

Hyperbranched polymer is a kind of non-linear polymers with highly branched structure and a lot of terminal groups. It has many advantages, such as high reactivity, good solubility and low viscosity. Hyperbranched polymer has become a focus in modern scientific domain. In this paper, polyester-type water-soluble hyperbranched monomer is prepared by the ring-opening polymerization reaction of maleic anhydride with polyol. Hyperbranched polyacrylate emulsion with 70-110nm was synthesized by emulsion polymerization using methyl methacrylate (MMA), butyl acrylate (BA), acrylic acid (AA) and hyperbranched polymer as comonomer. The effects of dosages and adding order of monomers, concentration of initator, type and amount of chain transfer agent on the polymerization are discussed. The as-prepared emusions were analyzed by FTIR, DSC, SEM. The solid content, particle size, stability of emulsion and morphology and water absorption of film were measured. The results showed that hyperbranched polyacrylate emulsion had low viscosity, high stability and can form very flat and smooth film. Hyperbranched polyacrylate emulsion can be widely applied in modern ink industry for its low cost,simple process and stable quality.

scholarly journals Synthesis and Evaluation of a Water-Soluble Hyperbranched Polymer as Enhanced Oil Recovery Chemical

2013 ◽  
Vol 2013 ◽  
pp. 1-11 ◽  
Author(s):  
Nanjun Lai ◽  
Xiaoping Qin ◽  
Zhongbin Ye ◽  
Qin Peng ◽  
Yan Zhang ◽  
...  
Keyword(s):  
Nmr Spectroscopy ◽  
Enhanced Oil Recovery ◽  
Oil Recovery ◽  
Hyperbranched Polymer ◽  
Raw Materials ◽  
Retention Rate ◽  
Water Soluble ◽  
Core Flooding ◽  
H Nmr ◽  
Initiation System

A novel hyperbranched polymer was synthesized using acrylamide (AM), acrylic acid (AA),N-vinyl-2-pyrrolidone (NVP), and dendrite functional monomer as raw materials by redox initiation system in an aqueous medium. The hyperbranched polymer was characterized by infrared (IR) spectroscopy,1H NMR spectroscopy,13C NMR spectroscopy, elemental analysis, and scanning electron microscope (SEM). The viscosity retention rate of the hyperbranched polymer was 22.89% higher than that of the AM/AA copolymer (HPAM) at 95°C, and the viscosity retention rate was 8.17%, 12.49%, and 13.68% higher than that of HPAM in 18000 mg/L NaCl, 1800 mg/L CaCl2, and 1800 mg/L MgCl2·6H2O brine, respectively. The hyperbranched polymer exhibited higher apparent viscosity (25.2 mPa·s versus 8.1 mPa·s) under 500 s−1shear rate at 80°C. Furthermore, the enhanced oil recovery (EOR) of 1500 mg/L hyperbranched polymer solutions was up to 23.51% by the core flooding test at 80°C.

scholarly journals Surface Pitting on Nanofibrous Matrix as an Ultra- Sensitive Indicator for Enzymatic Hydrolysis of Crystalline Cellulose

2021 ◽  
Author(s):  
mikiko tsudome ◽  
Mikako Tachioka ◽  
Miwako Tsuda ◽  
Yoshihiro Takaki ◽  
Shigeru Deguchi
Keyword(s):  
Enzymatic Hydrolysis ◽  
Enzymatic Degradation ◽  
Synthetic Polymers ◽  
Water Soluble ◽  
Crystalline Cellulose ◽  
Optical Profilometry ◽  
Enzymatic Hydrolysis Of Cellulose ◽  
Reaction Proceeds ◽  
Hydrolysis Of Cellulose ◽  
Hydrolysis Of

<p>Assaying enzymatic degradation of the water-insoluble substrate such as cellulose and synthetic polymers has remained technically challenging, primarily because only the surface of the substrate is accessible to the enzymes and the reaction proceeds very slowly compared with those of water-soluble substrates. Here we show an ultra-sensitive and semi-quantitative assay for enzymatic hydrolysis of cellulose. By combining nanofibrous matrices with piezo-driven inkjet printing and optical profilometry, enzymatic hydrolysis of less than 1 nanogram of crystalline cellulose was successfully quantified. Unprecedented genetic diversity of cellulase was revealed when the same principle was applied for elucidating microbial degradation of cellulose in the deep sea. This work demonstrates that truly interdisciplinary efforts, encompassing diverse disciplines from nanotechnology to microbiology, are crucial to address scientific and technological problems towards sustainability.<br></p>

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