Low Gel Temperature Agarose (LGTA) Media v2

protocols.io ◽  
2016 ◽  
Author(s):  
G Jason ◽  
April Woods
Keyword(s):  
Gel Temperature

Development and Characterization of Bismaleimides Containing Aliphatic Chain for Microelectronics Application

e-Polymers ◽  
2006 ◽  
Vol 6 (1) ◽  
Author(s):  
J. L. Feng ◽  
C. Y. Yue ◽  
K. S. Chian
Keyword(s):  
Chain Length ◽  
Moisture Absorption ◽  
Thermomechanical Analysis ◽  
Stress And Strain ◽  
Aliphatic Chain ◽  
Melting Points ◽  
Scanning Calorimetry ◽  
Backbone Chain ◽  
Gel Temperature

AbstractA series of bismaleimide systems containing aliphatic backbone chain have been synthesized and investigated. Differential Scanning Calorimetry (DSC), Thermogravimetric Analysis (TGA), Thermomechanical analysis (TMA), rheometry and tensile test were used to characterize the thermal and mechanical properties. It was noted that backbone chain length and odd-even effect affected properties. As the chain length increases, the curing peak temperature, gel temperature of BMI all increase, but the melting point, glass transition and moisture absorption decrease. The melting points of BMI-3,5,7 reduced most significantly. The tensile properties were affected by odd even effect significantly. BMI-3,5,7 with odd number of carbons have less stress and strain than those of even ones.

Curing Reaction and Kinetic Parameters of Diallyl Orthophthalate Resin with Initiator Dicumyl Peroxide

2010 ◽  
Vol 160-162 ◽  
pp. 1366-1371
Author(s):  
Xiao Qin Yue ◽  
Qi Lin Mei ◽  
Zhi Xiong Huang ◽  
Peng Wen ◽  
Ling Huang
Keyword(s):  
Kinetic Parameters ◽  
Frequency Factor ◽  
Treatment Temperature ◽  
Curing Temperature ◽  
Dicumyl Peroxide ◽  
Scanning Calorimetry ◽  
Thermal Treatment Temperature ◽  
Reaction Heat ◽  
Curing Reaction ◽  
Gel Temperature

The curing reaction of diallyl orthophthalate(DAOP) resin, which was initiated by dicumyl peroxide(DCP), was studied by Fourier transform infrared spectroscopy(FTIR). Differential scanning calorimetry(DSC) was used to determine the curing behavior and kinetic parameters of dicumyl peroxide (DCP) / diallyl orthophthalate (DAOP) system. The results clarified that the curing reaction of DAOP resin could be initiated by DCP at 150-180°C and the reaction heat diffused slowly in curing process. The gel-temperature, curing temperature and thermal treatment temperature of the DCP(3%)/DAOP system were 145.46°C, 166.03°C and 173.83°C. The apparent activation energy, frequency factor and reaction order were 130.200kJ/mol, 5.231×1010 and 0.9455, respectively.

Fabrication of NF-PLLA Scaffolds by Gel Extraction Phase Separation

2014 ◽  
Vol 1033-1034 ◽  
pp. 1090-1093
Author(s):  
Zhi Hang He ◽  
Jia Liu ◽  
Guo Jie Xu ◽  
Jian Jin Jiao ◽  
Xiu Feng Xiao
Keyword(s):  
Phase Separation ◽  
Bone Tissue ◽  
Mixed Solvent ◽  
Solvent System ◽  
Separation Method ◽  
Interconnected Network ◽  
Nanofibrous Scaffolds ◽  
And Performance ◽  
Gel Temperature ◽  
Extraction Phase

The 1, 4-dioxane/ethanol mixed solvent was used as solvent system, and the gel extraction phase separation method was adopted to prepare porous PLLA nanofibrous scaffolds. At that, we studied the effect of using different gel temperature to influence nanofibrous PLLA scaffolds’ structure and performance. The results showed that the morphology of nanofibers and the diameter of fibers could be regulated by gel temperature; a lower gel temperature resulted in higher crystallinity of PLLA scaffold. In addition, the PLLA scaffolds have excellent interconnected network when the gel temperature was in the range of-20 to-10°C. The PLLA scaffolds will become a material to repair the bone tissue, hopefully.

Effect of PVA on the gel temperature of MC and release kinetics of KT from MC based ophthalmic formulations

2012 ◽  
Vol 50 (3) ◽  
pp. 565-572 ◽  
Author(s):  
Mrinal Kanti Bain ◽  
Biplab Bhowmick ◽  
Dipanwita Maity ◽  
Dibyendu Mondal ◽  
Md. Masud Rahaman Mollick ◽  
...  
Keyword(s):  
Release Kinetics ◽  
Kinetics Of ◽  
Gel Temperature

Aroma Chip Using a Functional Polymer Gel

2012 ◽  
pp. 384-400
Author(s):  
Dong Wook Kim
Keyword(s):  
Controlled Release ◽  
Polymer Gel ◽  
Device Structure ◽  
Functional Polymer ◽  
Reversible Phase Transition ◽  
Peltier Module ◽  
Mechanical Devices ◽  
Reversible Phase ◽  
Gel Temperature ◽  
Olfactory Display

Conventionally, the controlled release of aroma molecules has been achieved by employing mechanical devices; however, it has not been possible to avoid the noise and gusts of air that devices emit prior to transmitting aroma information. Another problem is the adherence of odor components to the device structure, because the aroma source is located inside or at the bottom of the device. In this chapter, the authors focus on a chemical container of a functional polymer gel (temperature-responsive hydrogel) that features a reversible phase transition between sol and gel and the controlled release of aroma molecules using a Peltier module to control temperature. By this approach, they developed a soundless olfactory display based on an aroma chip and solved the problem of the adhesion of odor components by placing a card-based aroma source (aroma-chip array) on the top of the olfactory display.

High-Performance Silica/Epoxy Resin Hybrid Materials Prepared by In Situ Sol-Gel Process

2011 ◽  
Vol 308-310 ◽  
pp. 804-807
Author(s):  
Jian Jiao ◽  
Liang Zou ◽  
Pan Bo Liu ◽  
Guang Li Wu
Keyword(s):  
Electron Microscopy ◽  
Heat Resistance ◽  
Epoxy Resin ◽  
Hybrid Materials ◽  
High Performance ◽  
Mechanical Performance ◽  
Sol Gel ◽  
Mechanical And Thermal Properties ◽  
In Suit ◽  
Gel Temperature

Silica/epoxy resin hybrid materials are prepared with tetraethylorthosilicate (Si(OC2H5)4, TEOS) and γ-aminoproplytriethyoxysiliane (H2N(CH2)3Si(OC2H5)3, APTES) as the silica sources, epoxy resin as the polymer matrix, by the means of in-suit sol-gel method. The dosages of TEOS and APTES in preparation of hybrid materials, and the sol-gel temperature for silica resources are discussed to make sure of the influence of the structure and properties on hybrid materials. The dispersion of Silica in the epoxy resin are examined by transmission electron microscopy (TEM).The image of fracture surfaces of hybrid materials are examined by scanning electron microscopy (SEM). The glass transmission temperatures (Tg) are tested by differential scanning calorimeter (DSC) to characterize the heat resistance of hybrid materials. The optimum mechanical performance and heat resistance for silica/epoxy resin hybrid materials are achieved with 3wt% TEOS and APTES 2wt% employed in this materials when sol-gel temperature is 60°C. In general, the mechanical and thermal properties of the hybrid materials were improved greatly as compared with the pure epoxy resin.

scholarly journals THE EFFECT OF SOL-GEL TEMPERATURE AND SOLVENT POLYETHYLENE GLYCOL (PEG) IN ZnO- TiO2 PHOTOCATALYST ACT AS DEGRADER OF TEXTILE DYEING LIQUID WASTE

2016 ◽  
Vol 10 (2) ◽  
pp. 149
Author(s):  
Tanti Haryati ◽  
Novita Andarini ◽  
Siti Mardhiyah
Keyword(s):  
Crystal Structure ◽  
Photocatalytic Activity ◽  
Polyethylene Glycol ◽  
Uv Light ◽  
Sol Gel ◽  
Liquid Waste ◽  
Synthesis Temperature ◽  
Tio2 Photocatalyst ◽  
Textile Dyeing ◽  
Gel Temperature

<p>The use of TiO<sub>2</sub>  powder  as photocatalyst still provides some disadvantages such as the difficulties in regenerate ion, the low adsorption and turbulence . These problems can be overcomed by providing the photocatalyst as a composite of ZnO-TiO2. This research aims to  investigate  the  effect  of  composition  of  solvent  and  temperatureof  synthesis  on  the quality  and  photocatalytic  activity  of  ZnO-TiO2  which  was  prepared  by  sol-gel  method. The  photocatalytic  activity  was  determined  by  applying  the  composite  in  degradation  of Procion  Red  MX-8B  under  irradition  of  UV  light  for  24  hours.  The  procion  red concentration after degradation was determined by UV-Vis spectrophotometer. Meanwhile the effect of synt hesis temperature on crystal structure  of composite  was studied by XRD. The results show that the composite which was prepared by PEG 1500 at 1:4 of moles ratio and at 70  °C of  synthesis temperature has  highest degradation  percentage,  i.e. 55.375 % and photocataltic activity of 3.561 x 10<sup>-7</sup>mg/cm<sup>2</sup>s.</p>

scholarly journals Synthesis of Fibrous Hydroxyapatite through Sol-Gel Route

2009 ◽  
Vol 6 (2) ◽  
pp. 379-385
Author(s):  
Baghdad Science Journal
Keyword(s):  
Growth Rate ◽  
Sintering Temperature ◽  
Sol Gel ◽  
Calcium Nitrate ◽  
Morphological Characteristics ◽  
Phosphate Solution ◽  
Agar Gel ◽  
Gel Temperature

The sol-gel route using an agar gel with calcium nitrate and phosphate solution as starting materials for producing hydroxyapatite (HAP). The product formed were needle like, zigzag and straight fibres. The fibrous products on sintering transformed into stoichiometric HAP with a biological Ca/P ratio of 1.67. The influences of pH, temperature, nature of base and phosphate solution on the growth of fibrous HAP were studied. The pH of the solution was found to greatly influence the growth rate and morphology of the resultant product. The optimum gel temperature was found to be 60oC and sintering temperature of 900oC for 1 hour. The crystalline, thermal, functional and morphological characteristics of the fibrous HAP were investigated.

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