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Teeraphatpornchai, Teerawat; Nakajima-Kambe, Toshiaki; Shigeno-Akutsu, Yukie; Nakayama, M; Nomura, Nobuhiko; Nakahara, Tadaatsu; Uchiyama, Hiroo

doi:10.1023/a:1021713711160

Cited by 113 publications

(47 citation statements)

References 20 publications

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“…Aliphatic polyesters are considered the most promising biodegradable synthetic polymers that have been developed as the alternative of conventional thermoplastics. 1 They have received much attention because they can be degraded completely in the environment without forming any toxic products. 2 Otherwise, wound sutures, staples, and medical devices for internal drug deposition made of biodegradable polymers are able to dissolve and adsorbed in to the human body.…”

Section: Introductionmentioning

confidence: 99%

“…Several studies have described the isolation and characterization of microorganisms that can degrade polyester-based biodegradable plastics. 1,[16][17][18][19][20] Known to be responsible for the decomposition of a wide array of substrates in soil, Actinomycetes also play an important role in the biodeterioration of synthetic rubber or plastics. 21,22 Other species in soil, including Acidovorax facilis, Variovorax paradoxus, Bacillus, Streptomyces, and several mold strains were also found degrading polyesters.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

TH‐11, a Streptomyces sp. Strain that Degrades Poly(3‐Hydroxybutyrate) and Poly(Ethylene Succinate)

Hoang

Lee

Lai

et al. 2008

J Chinese Chemical Soc

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TH-11, a bacterial strain with strong depolymerase activity that breaks down aliphatic esters such as poly(3-hydroxybutyrate) (PHB) and poly(ethylene succinate) (PES) was isolated from a soil sample collected from the sediment of Tou-Chain River, Taiwan, R.O.C.. It was phenotypically and genetically characterized to be a Streptomyces strain. The degradation of PHB and PES were tested both using emulsified polymers in solid agar and thin polymer films in liquid culture media. The degradations were measured by clear-zone formation on solid agar plates, or direct weight measurements and electromicroscope inspection of the incubated polymer films in the liquid culture. The depolymerase activities can be detected in the cell-free preparation of the culture medium, and can be enhanced by gelatin.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

TH‐11, a Streptomyces sp. Strain that Degrades Poly(3‐Hydroxybutyrate) and Poly(Ethylene Succinate)

Hoang

Lee

Lai

et al. 2008

J Chinese Chemical Soc

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“…Unlike other petrochemical-based resins that take centuries to degrade after disposal, these polymers break down rapidly into carbon dioxide, water, and humus under appropriate conditions when they are exposed to the combined attack of water and micro-organisms. [2,3] These products also meet advanced composting standards and typically break down in twelve weeks under aerobic conditions. [4] In this direction, poly[(butylene succinate)-co-adipate] (PBSA) is among the most promising polymer.…”

Section: Introductionmentioning

confidence: 99%

Crystallization Behavior of Poly[(butylene succinate)‐co‐adipate] Nanocomposite

Ray

Bousmina

2006

Macro Chemistry & Physics

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Summary: The unique crystallization behavior of a poly[(butylene succinate)‐co‐adipate] (PBSA) nanocomposite is addressed. Nanocomposites have been prepared by melt blending PBSA and organically modified synthetic fluorine mica (OSFM) in a batch mixer. The structure of the nanocomposite is studied by using X‐ray diffraction and transmission electron microscopy, which reveal a coexistence of exfoliated and intercalated silicate layers homogeneously dispersed in the PBSA matrix. The non‐isothermal crystallization behavior of PBSA and the nanocomposite samples is studied by differential scanning calorimetry (DSC). Various models, namely the Avrami method, the Ozawa method, and the combined Avrami‐Ozawa method, are applied to describe the kinetics of the non‐isothermal crystallization. All analyses reveal that the incorporation of the OSFM alters the crystallization properties of PBSA but in ways unexpected from other polymer nanocomposite systems. Polarized optical microscopy is used to support this conclusion. The activation energy for the non‐isothermal crystallization of both samples is evaluated by using three different methods. The results show that the absolute value of the activation energy for the nanocomposite is higher than that of the neat polymer. This indicates the slower crystallization kinetics of the nanocomposite. The effect of incorporation of OSFM on the cold crystallization behavior of neat PBSA is also studied by both conventional and temperature‐modulated DSC.Polarized optical microscopy image of the PBSA/OSFM nanocomposite at 70 °C during non‐isothermal crystallization from the melt.magnified imagePolarized optical microscopy image of the PBSA/OSFM nanocomposite at 70 °C during non‐isothermal crystallization from the melt.

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“…However, one bioplastic-degrading bacterium was isolated and was preliminarily classified as Paenibacillus sp. Previously, Teeraphatpornchai et al (2003) reported that Paenibacillus amyloticus strain TB13 could degrade PLA, PBS, PCL and PES but not PHB-covalerate. This study was the first report that Cladosporium and Purpureocillium fungi could form clear zones on PLA, PBS and PCL agar plates.…”

Section: Discussionmentioning

confidence: 99%

Isolation and screening of biopolymer-degrading microorganisms from northern Thailand

Penkhrue

Khanongnuch

Masaki

et al. 2015

World J Microbiol Biotechnol

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Forty agricultural soils were collected from Chiang Mai and Lampang provinces in northern Thailand. Bacteria, actinomycetes and fungi were isolated and screened for their ability to degrade polylactic acid (PLA), polycaprolactone (PCL) and poly(butylene succinate) (PBS) by the agar diffusion method. Sixty-seven actinomycetes, seven bacteria and five fungal isolates were obtained. The majority of actinomycetes were Streptomyces based on morphological characteristic, chemotaxonomy and 16S rRNA gene data. Seventy-nine microorganisms were isolated from 40 soil samples. Twenty-six isolates showed PLA-degradation (32.9 %), 44 isolates showed PBS-degradation (55.7 %) and 58 isolates showed PCL-degradation (73.4 %). Interestingly, 16 isolates (20.2 %) could degrade all three types of bioplastics used in this study. The Amycolatopsis sp. strain SCM_MK2-4 showed the highest enzyme activity for both PLA and PCL, 0.046 and 0.023 U/mL, respectively. Moreover, this strain produced protease, esterase and lipase on agar plates. Approximately, 36.7 % of the PLA film was degraded by Amycolatopsis sp. SCM_MK2-4 after 7 days of cultivation at 30 °C in culture broth.

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Cited by 113 publications

References 20 publications

TH‐11, a Streptomyces sp. Strain that Degrades Poly(3‐Hydroxybutyrate) and Poly(Ethylene Succinate)

TH‐11, a Streptomyces sp. Strain that Degrades Poly(3‐Hydroxybutyrate) and Poly(Ethylene Succinate)

Crystallization Behavior of Poly[(butylene succinate)‐co‐adipate] Nanocomposite

Isolation and screening of biopolymer-degrading microorganisms from northern Thailand

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