Results 151 to 160 of about 2,790 (180)

Comparative study of PHBV/TBP and PHBV/BPA blends

Polymer International, 2004
AbstractIn order to clarify the effects of phenols on properties of polyesters, the blends of poly[(3‐hydroxybutyrate)‐co‐(3‐hydroxyvalerate)] (PHBV) with 4,4′‐dihydroxydiphenylpropane (BPA) and p‐tert‐butylphenol (TBP) were studied. The FTIR spectra revealed that there was strong hydrogen‐bond (H‐bond) interaction between PHBV and both phenols.
Bin Fei, Cheng Chen, Hang Wu, Shuwen Peng, Xiuyan Wang, Lisong Dong   +5 more
openaire   +1 more source

Extrusion foaming of PHBV

Journal of Cellular Plastics, 2014
This paper reports work on extrusion foaming of poly(3-hydroxybutyrate- co-3-hydroxyvalerate) with a chemical blowing agent based on sodium bicarbonate and citric acid and calcium carbonate nucleation agent. It includes investigations in the effects of rheological behaviour of the polymer, blowing agent, nucleation agent and processing conditions on ...
Szegda, D, Duangphet, S, Song, J, Tarverdi, K   +3 more
openaire   +3 more sources

Bone generation on PHBV matrices: an in vitro study

Biomaterials, 2003
Bone formation was investigated in vitro by culturing rat marrow stromal osteoblasts in biodegradable, macroporous poly(3-hydroxybutyric acid-co-3-hydroxyvaleric acid) (PHBV) matrices over a period of 60 days. Foams were prepared after solvent evaporation and solute leaching.
Feza Korkusuz, Petek Korkusuz, Aykut Ozkul   +2 more
exaly   +4 more sources

Co-precipitation of anthocyanin in PHBV by the SEDS technique

Journal of Food Science and Technology, 2020
Anthocyanins are pigments of plant origin responsible for most blue, purple and all shades of red found in flowers, fruits and some stems and roots of plants, besides comprising a class of potent antioxidant phenolic compounds. Due to the relevance of anthocyanins this work aims to encapsulate anthocyanin extracted from the wine lees through the ...
Gean P S, Aguiar, Camila Dal, Magro, Gabriel O, Carvalho, Aline E, Santos, Marcelo, Lanza, J Vladimir, Oliveira   +5 more
openaire   +2 more sources

Antibiotic Release from Biodegradable PHBV Microparticles

Journal of Controlled Release, 1998
For the treatment of periodontal diseases, design of a controlled release system seemed very appropriate for an effective, long term result. In this study a novel, biodegradable microbial polyester, poly(3-hydroxybutyrate-co-3-hydroxyvalerate), PHBV of various valerate contents containing a well established antibiotic, tetracycline, known to be ...
D, Sendil, I, Gürsel, D L, Wise, V, Hasirci   +3 more
openaire   +2 more sources

Improvement in hydrophilicity of PHBV films by plasma treatment

Journal of Biomedical Materials Research Part A, 2005
AbstractPoly(3‐hydroxybutyrate‐co‐hydroxyvalerate) (PHBV) films were prepared by the solvent cast method. Oxygen and nitrogen plasma treatment were used to improve the hydrophilicity of the surface of PHBV films. The surface properties were characterized by contact angle measurement and X‐ray photoelectron spectroscopy (XPS). The water contact angle of
Yingjun, Wang, Ling, Lu, Yudong, Zheng, Xiaofeng, Chen   +3 more
openaire   +2 more sources

Tissue engineered cartilage on collagen and PHBV matrices

Biomaterials, 2005
Cartilage engineering is a very novel approach to tissue repair through use of implants. Matrices of collagen containing calcium phosphate (CaP-Gelfix), and matrices of poly(3-hydroxybutyric acid-co-3-hydroxyvaleric acid) (PHBV) were produced to create a cartilage via tissue engineering.
Özkul, Aykut, Yildiz, C, Soysal, Yasemin, Ozdemir, T, Kose, Gt, Korkusuz, F, Hasirci, V   +6 more
openaire   +3 more sources

Interaction of human smooth muscle cells on random and aligned nanofibrous scaffolds of PHBV and PHBV-gelatin

International Journal of Polymeric Materials and Polymeric Biomaterials, 2016
ABSTRACTTissue-engineered scaffolds with nanofibrous morphology have been shown to be effective in regeneration of tissues because nanofibers mimic the native architecture of the extracellular matrix. The unique alignment in the native tissue motivated the authors to fabricate aligned nanofibers of poly(3-hydroxybutyrate-co-3-hydroxyvalerate) (PHBV ...
Purushothaman Kuppan, Swaminathan Sethuraman, Uma Maheswari Krishnan   +2 more
openaire   +1 more source

Fabrication and characterization of bioactive wollastonite/PHBV composite scaffolds

Biomaterials, 2004
Composite scaffolds of polyhydroxybutyrate-polyhydroxyvalerate (PHBV) with bioactive wollastonite were fabricated by a compression moulding, thermal processing, and salt particulate leaching method. Structure and mechanical properties of the scaffolds were determined. The bioactivity of the composites was evaluated by soaking in a simulated body fluid (
Jiang Chang
exaly   +3 more sources

The manufacture of PHBV and PHBV/Akermanite composite scaffolds using selective laser sintering

2019
Autogenous (host), allogeneic (donor), or xenogeneic (animal donor) bone is conventionally used as a bone substitution material for the repair of fractured and defected bone. However, in autogenous bone grafting, it is necessary to undertake an additional harvesting surgery on the patient, and the supply of tissue is limited.
openaire   +3 more sources