Thermal properties and enzymatic degradation of PBS copolyesters containing dl-malic acid units

Chemosphere ◽  
2021 ◽  
Vol 272 ◽  
pp. 129543
Author(s):  
Huashan Wang ◽  
Kaiyue Liu ◽  
Xing Chen ◽  
Meiyi Wang
Keyword(s):  
Thermal Properties ◽  
Malic Acid ◽  
Enzymatic Degradation

Effect of nanofiller's type on the thermal properties and enzymatic degradation of poly(ε-caprolactone)

2014 ◽  
Vol 108 ◽  
pp. 257-268 ◽  
Author(s):  
Maria Nerantzaki ◽  
George Z. Papageorgiou ◽  
Dimitrios N. Bikiaris
Keyword(s):  
Thermal Properties ◽  
Enzymatic Degradation

OH-functional polyesters based on malic acid: Influence of the OH-groups onto the thermal properties

2013 ◽  
Vol 49 (1) ◽  
pp. 217-227 ◽  
Author(s):  
Christian Hahn ◽  
Sebastian Wesselbaum ◽  
Helmut Keul ◽  
Martin Möller
Keyword(s):  
Thermal Properties ◽  
Malic Acid ◽  
Oh Groups

Novel Poly (butylenes succinate-block-1,3-propylene sebacate): Synthesis and Enzymatic Degradation

2013 ◽  
Vol 774-776 ◽  
pp. 569-572
Author(s):  
Zong Hua Kang ◽  
Chang Lu Wang
Keyword(s):  
Thermal Properties ◽  
Enzymatic Hydrolysis ◽  
Enzymatic Degradation ◽  
Biodegradable Materials ◽  
Pseudomonas Cepacia ◽  
Butylene Succinate ◽  
Molar Ratios ◽  
H Nmr ◽  
Biodegradable Poly

This study synthesizes a series of aliphatic biodegradable poly (butylene succinate-block-1,3-propylene sebacate) (PBS-b-PPS) copolyesters by incorporation of PPS into the PBS molecular chains at various molar ratios. The effects of these compositions on the thermal properties, crystallinity and biodegradability were investigated.The PBS-b-PPS were characterized using 1H NMR, DSC and POM.Biodegradability was evaluated by enzymatic hydrolysis with a lipase from Pseudomonas cepacia. The copolyesters might be potentially useful as the biodegradable materials.

scholarly journals Blended Natural Support Materials—Collagen Based Hydrogels Used in Biomedicine

Materials ◽  
2020 ◽  
Vol 13 (24) ◽  
pp. 5641
Author(s):  
Ruxandra-Elena Geanaliu-Nicolae ◽  
Ecaterina Andronescu
Keyword(s):  
Thermal Properties ◽  
Biomedical Research ◽  
Potential Application ◽  
Enzymatic Degradation ◽  
Review Article ◽  
Mechanical And Thermal Properties ◽  
Abundant Protein ◽  
Support Materials ◽  
Natural Support ◽  
Triple Helices

Due to their unique properties—the are biocompatible, easily accessible, and inexpensive with programmable properties—biopolymers are used in pharmaceutical and biomedical research, as well as in cosmetics and food. Collagen is one of the most-used biomaterials in biomedicine, being the most abundant protein in animals with a triple helices structure, biocompatible, biomimetic, biodegradable, and hemostatic. Its disadvantages are its poor mechanical and thermal properties and enzymatic degradation. In order to solve this problem and to use its benefits, collagen can be used blended with other biomaterials such as alginate, chitosan, and cellulose. The purpose of this review article is to offer a brief paper with updated information on blended collagen-based formulations and their potential application in biomedicine.

Role of the exosporial membrane in attachment and germination of C. sporogenes

1993 ◽  
Vol 51 ◽  
pp. 38-39
Author(s):  
B.J. Panessa-Warren ◽  
G.T. Tortora ◽  
J.B. Warren
Keyword(s):  
Enzymatic Degradation ◽  
Light Transmission ◽  
Extended Period ◽  
Growth Conditions ◽  
Clostridium Sporogenes ◽  
Radiation Chemical ◽  
Physical Trauma ◽  
Extended Contact ◽  
Cold Pressure

Some bacteria are capable of forming highly resistant spores when environmental conditions are not adequate for growth. Depending on the genus and species of the bacterium, these endospores are resistant in varying degrees to heat, cold, pressure, enzymatic degradation, ionizing radiation, chemical sterilants,physical trauma and organic solvents. The genus Clostridium, responsible for botulism poisoning, tetanus, gas gangrene and diarrhea in man, produces endospores which are highly resistant. Although some sporocides can kill Clostridial spores, the spores require extended contact with a sporocidal agent to achieve spore death. In most clinical situations, this extended period of treatment is not possible nor practical. This investigation examines Clostridium sporogenes endospores by light, transmission and scanning electron microscopy under various dormant and growth conditions, cataloging each stage in the germination and outgrowth process, and analyzing the role played by the exosporial membrane in the attachment and germination of the spore.

The thermal properties of some amine tetraphenylboron salts8-Quinolinol and its derivatives

1960 ◽  
Vol 23 ◽  
pp. 332-336 ◽  
Author(s):  
W WENDLANDT ◽  
J VANTASSEL ◽  
G ROBERTHORTON
Keyword(s):  
Thermal Properties
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