scholarly journals Localised sequence regions possessing high melting temperatures prevent the amplification of a DNA mimic in competitive PCR

1998 ◽  
Vol 26 (14) ◽  
pp. 3340-3347 ◽  
Author(s):  
D. G. McDowell ◽  
N. A. Burns ◽  
H. C. Parkes
2002 ◽  
Vol 124 (27) ◽  
pp. 7888-7889 ◽  
Author(s):  
Makoto Mitani ◽  
Rieko Furuyama ◽  
Jun-ichi Mohri ◽  
Junji Saito ◽  
Seiichi Ishii ◽  
...  

2016 ◽  
Vol 54 (24) ◽  
pp. 3795-3799 ◽  
Author(s):  
Donglin Tang ◽  
Zijian Chen ◽  
Felipe Correa-Netto ◽  
Christopher W. Macosko ◽  
Marc A. Hillmyer ◽  
...  

2019 ◽  
Vol 21 (24) ◽  
pp. 12787-12797 ◽  
Author(s):  
A. Abdelaziz ◽  
D. H. Zaitsau ◽  
N. V. Kuratieva ◽  
S. P. Verevkin ◽  
C. Schick

Surprisingly high melting temperatures of the five nucleobases have been measured using a specially developed fast scanning calorimetry method that prevents decomposition. Results are rationalized in terms of an “ideal associated solution”.


1956 ◽  
Vol 29 (4) ◽  
pp. 1181-1194 ◽  
Author(s):  
L. Mandelkern ◽  
F. A. Quinn ◽  
D. E. Roberts

Abstract The melting temperatures of two of the crystalline modifications of gutta-percha and their mixtures with either methyl oleate or tetradecane as diluent were determined by x-ray diffraction and dilatometric methods. It was found that the melting temperatures of the two forms in the pure polymer were 64 and 74°, respectively. From these studies the heat of fusion per repeating unit of the high melting form was deduced to be 3070 ± 250 cal./mole, while the heat of fusion for the low melting modification was found to be about one-half to three-fourths this value. An analysis indicates the low melting form is a metastable one. The heats and entropies of fusion of each of the forms of gutta-percha are appreciably greater than those of the monomorphic as-hydro-carbon, natural rubber. The difference in the entropies of fusion of the two polymers persists even when allowance is made for the significant contribution of the volume change accompanying fusion.


2007 ◽  
Vol 1000 ◽  
Author(s):  
J.S. Wright ◽  
R. Khanna ◽  
L. Stafford ◽  
B.P. Gila ◽  
D.P. Norton ◽  
...  

Purpose: Need for reliable, thermally stable Ohmic metallizations for ZnO. Because of difficulties with current common contact metals, there exists a heavy desire for metals with high melting temperatures and low reactivities.


Impact ◽  
2020 ◽  
Vol 2020 (1) ◽  
pp. 18-20
Author(s):  
Satofumi Maruyama

Sintering is an extremely flexible process where micro-scale particles are bonded together through heat and pressure, and is often used to work elements that are compounds with unworkably high melting temperatures. The technology has been used in basic form for thousands of years through its fundamental role in the production of ceramics and the strengthening of bricks. It is the process that allows ceramics to harden into a range of different useful structures in the kiln oven. During the 19th century, our understanding of the mechanics of sintering vastly expanded through visionaries such as William D. Coolidge. He used the principles of sintering to create flexible tungsten elements for incandescent light bulb. From there, methods for sintering all sorts of materials were honed. Maruyama's work is now focused on improving the sinterability of boron carbide. To do this, he is testing a range of different sintering techniques aiming to produce high-quality boron carbide at a lower cost than is currently available.


2000 ◽  
Vol 104 (31) ◽  
pp. 7522-7527 ◽  
Author(s):  
Sarah L. Keller ◽  
Arun Radhakrishnan ◽  
Harden M. McConnell

2020 ◽  
Vol 21 (10) ◽  
pp. 3674 ◽  
Author(s):  
Yuushou Nakayama ◽  
Kazumasa Watanabe ◽  
Ryo Tanaka ◽  
Takeshi Shiono ◽  
Norioki Kawasaki ◽  
...  

Poly(ester amide)s are attracting attention because they potentially have excellent thermal and mechanical properties as well as biodegradability. In this study, we synthesized a series of novel poly(ester amide)s by introducing γ-aminobutyric acid (GABA) regularly into polyesters, and investigated their properties and biodegradabilities. GABA is the monomer unit of biodegradable polyamide 4 (PA4). The new poly(ester amide)s were synthesized from the reaction of ammonium tosylate derivatives of alkylene bis(γ-aminobutylate) and p-nitrophenyl esters of dicarboxylic acids. All the obtained polymers showed relatively high melting temperatures (Tm). Their thermal decomposition temperatures were improved in comparison with that of PA4 and higher enough than their Tm. The poly(ester amide)s exhibited higher biodegradability in seawater than the corresponding homopolyesters. Their biodegradabilities in activated sludge were also studied.


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