natural fibre bio composites incorporating poly lactic acid

... (2007) Polylactic acid fiber: An overview, Progress in Polymer Science, vol 32, pp.445-482, ISSN 1004-9541 [7] Mochizuki, M (2006) Properties and applications of aliphatic Polyester Products: Biopolymers ... direction of knitted Ingeo™ Poly (lactic acid) fabric Figure Effect of time of heatsetting on the linearity of load extension in weft direction of knitted Ingeo™ Poly (lactic acid) Figure Mean effect ... resilience RT % on knitted Ingeo Poly (lactic acid) (PLA) fabric Conclusion The effect of time of heatsetting on tensile properties of knitted Ingeo™ Poly (lactic acid) (PLA) was determined using...

Ngày tải lên: 05/09/2013, 16:10

... Abbreviations List of Abbreviations PLA polylactic acid or polylactide sc stereocomplex PLLA poly( L -lactic acid) or poly( L-lactide) PDLA poly( D -lactic acid) or poly( D-lactide) DFT density functional ... finally the scope and organization 1.1 Overview of Poly( lactic acid) Poly( lactic acid) or Poly( lactide) (PLA) is a synthetic biopolymer of lactic acid, which can be derived by bacterial fermentation ... amorphous or crystalline, in general semicrystalline Both homopolymers poly( Llactic acid) or poly( L-lactide) (PLLA) and poly( D -lactic acid) or poly( D-lactide) (PDLA) are isotactic and meet the basic...

Ngày tải lên: 09/09/2015, 18:56

... addition to proteins, biodegradable polymers such as poly (lactic acid) (PLA) and poly( lactic- co-glycolic acid) (PLGA) and various biodegradable copolymers such as poly( lactic acid) -poly (ethylene glycol) ... saline Poly Dispersity Index Polyethylene glycol Positron emission tomography Poly (lactic acid) Poly (lactic acid) -D-alpha-tocopheryl polyethylene glycol 1000 succinate Poly (lactic acid) -poly ... and most commonly used polymers as shielding groups are the PEG-containing copolymers One important example of such a copolymer is poly (lactic acid) -D-alpha-tocopheryl polyethylene glycol 1000...

Ngày tải lên: 13/10/2015, 15:54

... Whilst naturally-derived biodegradable polymers are usually mimicked the key elements of normal tissue [22] Poly( lactic- co-glycolic acid) (PLGA) are bioresorbable and biocompatible synthetic polymer, ... disc Adv Exp Med Biol 2006, 585:169-181 Lee SJ, Lee I, Lee YM, Lee HB, Khang G: Macroporous biodegradable natural/ synthetic hybrid scaffolds as small intestine mucosa impregnated poly( lactide0 co- ... Lindenhayn K, Perka C: In vitro-cultivation of human periosteum derived cells in bioresorbable polymer-TCPcomposites Biomaterials 2002, 23(11):2303-2310 Perka C, Schultz O, Spitzer RS, Lindenhayn...

Ngày tải lên: 20/06/2014, 01:20

... for Biotechnology and Bioengineering, Centre of Biological Engineering, University of Minho, Campus de Gualtar, 4710-057 Braga, Portugal 23Bs Research Group - Biomaterials, Biodegradables and Biomimetrics, ... Process Biochem 38:909–914 doi:10.1016/S0032-9592(02)00173-5 Shi J, Alves NM, Mano JF (2008) Towards bioinspired superhydrophobic poly( Llactic acid) surfaces using phase inversion-based methods Bioinspir ... Santos JL, Tomás H, Mano JF (2009) Bioinspired superhydrophobic poly( L -lactic acid) surfaces control bone marrow derived cells adhesion and proliferation J Biomed Mater Res A 91A:480–488 doi:10.1002/jbm.a.32210...

Ngày tải lên: 20/06/2014, 23:20

... System) NC Nghiên cứu PACA poly( alkylcyanoacrylat) PDI Chỉ ố đa phân tán PEG Polyethylenglycol PEO Polyethylen oxyd PLA Polylactic acid PLGA Poly( lactic- co-glycolic) acid TEM Kính hiển vi điện ... chủ yếu polyme có sẵn Eudragit đặc biệt polyme phân hu sinh học PLGA, polylactic acid (PLA), polycaprolacton (PCL),…[3], [38] Bên cạnh đó, nhiều nghiên cứu sử dụng kết hợp polyme tổng hợp polyme ... đảm bảo nhóm NH2 C C H P G điện ly thành ion Giá trị pKa acid lactic oligom poly- lactic acid 3,1, acid glycolic oligom poly- glycolic acid 3,83 [48] Giá trị p a nhóm 29 amin bậc CS khoảng 6,3...

Ngày tải lên: 25/07/2015, 00:46

... phần polyme cấu thành: Các polyme acid polylactic tồn dạng hoạt quang (acid L-polylactic) dạng racemic không hoạt quang (D, L -acid polylactic) PLGA copolyme điều chế từ acid L-polylactic polyglycolide ... dụng poly (lactic- co-glycolic) acid hyaluronic acid tiến hành với mục tiêu sau: Xây dựng công thức bào chế tiểu phân nano artesunat - poly( lactic – co-glycolic) acid (PLGA), bao với hyaluronic acid ... kết tinh polyme PLGA, hay nói cách khác, phụ thuộc vào loại tỷ lệ mol thành phần polyme (lactic glycolide) chuỗi copolyme Acid lactic kỵ nước so với acid glycolic và, đó, PLGA có tỉ lệ lactic cao...

Ngày tải lên: 25/07/2015, 00:46

... urethane)urea PGA : Poly( glycolic acid) PLGA : Poly( lactic- co-glycolic acid) PLLA : Poly( L -lactic acid) PMMA : Poly( methylmethacrylate) pNIPAM : Poly( N-isopropylacrylamide) PVA : Poly( vinyl alcohol) ... growth factors Poly( L -lactic acid) (PLLA), type I collagen (Col) and hydroxyapatite (HA) biocompatible and biodegradable materials were employed These materials were fabricated into nanocomposites ... Ramakrishna Electrospun Poly( L -lactic acid) Nanofibres Loaded with Dexamethasone to Induce Osteogenic Differentiation of Human Mesenchymal Stem Cells Journal of Biomaterials Science, Polymer Edition...

Ngày tải lên: 09/09/2015, 10:07

... Tóm tắt Cấu trúc tính chất nghiên cứu để kết hợp nhị phân gồm poly lactic axit ( PLA ) poly butylen succinic ( PBS) Các phép đo lưu biến trạng thái nóng chảy phát khối lượng ... mô hình nhũ tương modun dao động cắt trạng thái nóng chảy Polyme blend không trộn lẫn mô tả phần tinh khiết riêng, sức căng bề mặt gữa polyme không trộn lẫn tan chẩy ước lượng tính chất độ nhớt ... trình ví dụ như: thời gian chu kỳ ép phun tốc độ sản xuất Việc mở rộng nghiên cứu công nghệ kết hợp polymer quan tâm Yamane sakai tìm từ phép đo lưu biến xác thêm vào phần nhỏ đồng phân quang học,...

Ngày tải lên: 23/04/2013, 21:05

... correct severe acidosis This is controversial Other agents have been used as an alternative to bicarbonate to correct the acidosis, but they have an unproven benefit ᭿ LACTIC ACIDOSIS What are ... SURGICAL CRITICAL CARE VIVAS M METABOLIC ACIDOSIS What is metabolic acidosis? This is an acid- base disturbance characterised by an increase in the total body acid such that the pH falls below 7.35 ... VIVAS M This increased acid load is buffered by circulating bicarbonate, which is then blown off by the lungs as carbon dioxide Causes include ᭿ Lactic acidosis ᭿ Diabetic ketoacidosis (DKA) ᭿ Some...

Ngày tải lên: 01/11/2013, 09:20

... polymer b -poly (L-malate) in plasmodia of Physarum polycephalum Eur J Cell Bio 70, 373–380 Lee B-S, Vert M & Holler E (2002) Water-soluble aliphatic polyesters: Poly( malic acid) s In Biopolymers ... conditions on beta -poly( L-malate) production by Physarum polycephalum Appl Microbiol Biotechnol 51, 647–652 Karl M & Holler E (1998) Multiple polypeptides immunologically related to b -poly( L-malate) ... direction of depolymerization of b -poly( L-malate) catalysed by polymalatase from Physarum polycephalum Fluorescence labeling at the carboxy-terminus of b -poly (L-malate) Eur J Biochem 250, 308–314...

Ngày tải lên: 07/03/2014, 12:20

... (1960) Nucleic acid metabolism in a slime mold with synchronous mitosis Biochim Biophys Acta 38, 298–306 18 Holler, E (1997) Poly( malic acid) from natural sources Handbook of Engineering Polymeric ... b-L-malylAMP-ligase and b -poly( L-malate) polymerase? Eur J Biochem 265, 1085–1090 12 Korherr, C., Roth, M & Holler, E (1965) Poly( b-L-malate) hydrolase from plasmodia of Physarum polycephalum Can J Microbiol 41 ... inhibitors of b -poly( L-malate)-hydrolase (polymalatase) Eur J Biochem 267, 5101–5105 15 Karl, M & Holler, E (1998) Multiple polypeptides immunologically related to b -poly( L-malate) hydrolase (polymalatase)...

Ngày tải lên: 17/03/2014, 10:20

... & Roberfroid, 1994) Prebiotic thường sử dụng kết hợp với probiotic (gọi synbiotic) Các hợp chất đường mạch ngắn sử dụng phổ biến prebiotic bổ sung vào thức ăn thủy sản, số bao gồm: Inulin, ... dịch, peptide kháng khuẩn, prebiotic (hợp chất tiền sinh học), probiotic (chế phẩm vi sinh) Trong đó, việc sử dụng chế phẩm vi sinh ngày quan tâm ứng dụng rộng rãi Probiotic ban đầu định nghĩa “chế ... probiotic giảm xuống nhiều giúp cho vật nuôi tiêu hóa tốt hơn, giảm tỉ lệ bệnh góp phần cải thiện môi trường Viện Sinh học Nhiệt đới thành công việc nghiên cứu sản xuất chế phẩm probiotic BioII...

Ngày tải lên: 27/04/2014, 17:03

... CSL, 98 g of lactic acid were produced per euro of nutrients while only 50 g lactic acid were obtained per euro when the Mercier medium was employed where t is time, P is lactic acid concentration, ... Technol Biotechnol, 60: 241–246 Burgos-Rubio, C.N., Okos, M.R and Wankat, P.C., 2000, Kinetic studies of the conversion of different substrates to lactic acid using lactobacillus bulgaricus, Biotechnol ... steep liquor by Anaerobiospirillum succiniciproducens, Biotechnol Bioprocess Eng, 5: 379–381 Mercier, P., Yerushalmi, L., Rouleau, D and Dochain, D., 1992, Kinetics of lactic acid fermentation on...

Ngày tải lên: 05/05/2014, 08:44

... of poly( L -lactic acid) and poly( D -lactic acid) by solid-state coextrusion Polym J 39, 953–960 Tanaka, T., Hoshina, M., Tanabe, S., Sakai, K., Ohtsubo, S., Taniguchi, M., 2006 Production of D -lactic ... concentration for Dlactic acid and reducing sugar analysis The D -lactic acid concentration (g/l) was estimated by colorimetric assay method (Taylor, 1996) For the calculation of D -lactic acid yield, ... utilized by lactic acid bacteria Although the highest production rate was obtained, the D -lactic acid concentration was low and the unit price Table Content of some essential amino acids (g/100...

Ngày tải lên: 05/05/2014, 08:44

... amount of lactic acid in the medium and the buffering capacity of the medium are known The amount of undissociated lactic acid is then further related to the total amount of lactic acid LaHtot ... Microbiology 73 (2002) 239–250 amount of cells and lactic acid present in a surface liquid layer with known dimensions, the adapted model describes the concentrations of cells and lactic acid ... and lactic acid production are described by the following set of differential equations dN ¼ lN dt ð1Þ ð2Þ with N the cell concentration [cfu/ml] and LaHtot the total concentration of lactic acid...

Ngày tải lên: 05/05/2014, 08:44

... for the Functionalization of Pyrene with 4-(2,4,6-Trimethylphenyloxy)Benzamide (TMPBA) in Polyphosphoric Acid (PPA)/Phosphorous Pentoxide (P2O5) Into a 250-mL resin flask equipped with a high-torque ... CH3 10 sp2C-H OH O P O n NH3 O P O n Scheme a The reaction between pyrene and TMPBA in poly( phosphoric acid) /phosphorous pentoxide at 130 °C; b proposed mechanism of a ‘‘direct’’ Friedel–Crafts ... between pyrene as a miniature graphene and 4-(2,4,6-trimethylphenyloxy)benzamide (TMPBA) in polyphosphoric acid (PPA)/phosphorous pentoxide (P2O5) medium was successful for anticipating the edgechemistry...

Ngày tải lên: 21/06/2014, 17:20

... Tan, J.-B Baek, Polymer (Guildf) 47, 1132 (2006) doi:10.1016/j.polymer.2005.12.064 16 K Saeed, S.Y Park, H.-J Lee, J.-B Baek, W Huh, Polymer (Guildf) 23, 8019 (2006) doi:10.1016/j.polymer.2006.09.012 ... selectively destroy the amorphous carbons Unlike SWCNTs treated in hydrochloric acid and nitric acid/ sulfuric acid treatments [20–22], there were no broken SWCNTs in bundles observed in this ... The reaction condition in PPA/P2O5 medium at 130 °C has been utilized in both the polymerization of phenoxybenzoic acids [11] and functionalization of closely related carbon materials such as vapor-grown...

Ngày tải lên: 22/06/2014, 00:20

... Effect of bile acid on the cell membrane functionality of lactic acid bacteria for oral administration Res Microbiol 157:720–725 doi: 10.1016/j.resmic.2006.04.002 Thongsom M (2004) Lactic acid bacteria ... between O2, H2, OH, e- and O2- in free radical damage to biological systems 123 World J Microbiol Biotechnol (2009) 25:1337–1345 Arch Biochem Biophys 204:18–29 doi:10.1016/00039861(80)90003-X Krasaekoopt ... A (2000) Acid and bile tolerance of spore-forming lactic acid bacteria Int J Food Microbiol 61:193–197 doi:10.1016/S0168-1605(00)00366-4 Kailasapathy K (2002) Microencapsulation of probiotic bacteria:...

Ngày tải lên: 07/07/2014, 19:20

... of poly (L -lactic acid) ” , Europeal polymer Journal, Vol 41, pp 569-575 13.G H Yew, A M Mohd yusof, et al (2006), “ Natural weathering effects on the mechanical properties of Poly lactic Acid ... cho PLA • Polyme bend PLA với polyme không phân hủy sinh học Các polyme không phân hủy sinh học thường polyme không phân cực (các polyolefin, cao su tự nhiên tổng hợp, polystiren…) hay polyme có ... với poly( p-vinyl phenol) polyme có khả tan dung dịch NaOH nên polyme bị phân hủy với tốc độ lớn so với PLA nguyên chất [41] Trộn hợp PLA với polyme không ưa nước poly( etylen), poly( propylen), poly( styren)…...

Ngày tải lên: 31/07/2014, 17:49