نتایج جستجو برای: cs g plla

تعداد نتایج: 471288  

2017
Ping Liu Xiao-Tong Chen Hai-Mu Ye

In this study, polylactide/urea complexes were successfully prepared by the electrospinning method, then the host urea component was removed to obtain a coalesced poly(L-lactide) (PLLA)/poly(D-lactide) (PDLA) blend. The crystallization behavior of the coalesced PLLA/PDLA blend (c-PLLA/PDLA) was studied by a differential scanning calorimeter (DSC) and Fourier transform infrared (FTIR) spectrosco...

Journal: :The Journal of chemical physics 2013
Ainhoa Lejardi Aitziber Eleta López José R Sarasua U B Sleytr José L Toca-Herrera

Fabrication of novel bio-supramolecular structures was achieved by recrystallizing the bacterial surface protein SbpA on amorphous and semicrystalline polylactide derivatives. Differential scanning calorimetry showed that the glass transition temperature (T(g)) for (poly-L-lactide)-PLLA, poly(L,D-lactide)-PDLLA, poly(lactide-co-glycolide)-PLGA and poly(lactide-co-caprolactone)-PLCL was 63 °C, 5...

2014
Berna Kankilic Elif Bilgic Petek Korkusuz Feza Korkusuz

BACKGROUND Implant-related osteomyelitis (IRO) is recently controlled with local antibiotic delivery systems to overcome conventional therapy disadvantages. In vivo evaluation of such systems is however too little. QUESTIONS/PURPOSES We asked whether vancomycin (V)-containing poly-l-lactic acid/β-tricalcium phosphate (PLLA/β-TCP) composites control experimental IRO and promote bone healing in...

Journal: :جنگل و فرآورده های چوب 0
حمیدرضا رودی تهران- دانشگاه شهید بهشتی- دانشکده مهندسی انرژی و فناوری های نوین- گروه مهندسی فناوری سلولز و کاغذ یحیی همزه دانشگاه تهران- دانشکده منابع طبیعی- گروه علوم و صنایع چوب و کاغذ اعظم برهانی دانشگاه تهران- دانشکده منابع طبیعی-گروه علوم و صنایع چوب و کاغذ

in this study, in order to constitute polyelectrolyte multilayers (pem) using layer-by-layer nanotechnology, recycled fibers were subsequently treated with cationic starch (cs) and anionic starch (as) multi-layers each layer conducted at neutral ph for 10 minutes. also, to compare with mechanical of refining, the pulp was refined for 25 minutes to the freeness of about 291 ml.csf using valley b...

2017
Sang-Don Yoon Young-Sam Kwon Kyu-Sung Lee

PURPOSE The purpose of this study was to evaluate the biodegradation and biocompatibility of poly L-lactic acid (PLLA) implantable mesh under in vitro and in vivo conditions. METHODS PLLA mesh was examined for changes in weight and tensile strength. The histology of the tissue around the PLLA implant was also evaluated. RESULTS The weight and tensile strength of the PLLA prosthesis was stab...

2016
Yan-Hua Cai Li-Sha Zhao

The goal of this work was to study the non isothermal and isothermal crystallization behavior of Poly(L-lactic acid) (PLLA) with melamine (TP) through differential scanning calorimeter and optical depolarizer. The study of the crystallization behavior of PLLA/TP composites indicated that TP could promote the crystallization of PLLA. The half time of overall crystallization of PLLA with 1.5 wt% ...

2014
Veluska Arias Anders Höglund Karin Odelius Ann-Christine Albertsson

The effective use of biodegradable polymers relies on the ability to control the onset of and time needed for degradation. Preferably, the material properties should be retained throughout the intended time frame, and the material should degrade in a rapid and controlled manner afterward. The degradation profiles of polyester materials were controlled through their miscibility. Systems composed...

Journal: :Colloids and surfaces. B, Biointerfaces 2013
Hiroyuki Shinto Takuya Hirata Tomonori Fukasawa Syuji Fujii Hayata Maeda Masahiro Okada Yoshinobu Nakamura Tsutomu Furuzono

We have measured the interaction forces between a murine melanoma cell and a poly(l-lactic acid) (PLLA) microsphere coated with/without hydroxyapatite (HAp) nanoparticles (i.e., an HAp/PLLA or a bare PLLA microsphere) in a serum-free culture medium, using atomic force microscopy (AFM) with colloid probe technique, in order to investigate how the HAp-nanoparticle coating as well as interfacial s...

2017
Hsin-Ta Wang Pao-Chang Chiang Ting-Lin Wu Yu-Hwa Pan Wei-Jen Chang João F. Mano

The aim of this study was to fabricate biodegradable poly-L-lactic acid (PLLA) bone screws containing iron oxide (Fe3O4) nanoparticles, which are radiopaque and 3D-printable. The PLLA composites were fabricated by loading 20%, 30%, and 40% Fe3O4 nanoparticles into the PLLA. The physical properties, including elastic modulus, thermal properties, and biocompatibility of the composites were tested...

2018
Mingwei Yuan Chengdong Xiong Lin Jiang Hongli Li Minglong Yuan

Graphene oxide (GO) was employed for the preparation of GO-zinc oxide (ZnO). The hydroxyl group on the surface was exploited to trigger the l-lactide ring-opening polymerization. A composite material with poly(l-lactide) (PLLA) chains grafted to the GO-ZnO surface, GO-ZnO-PLLA, was prepared. The results demonstrated that the employed method allowed one-step, rapid grafting of PLLA to the GO-ZnO...

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