of its thermal and mechanical properties, permeability, and susceptibility to hydrolytic chain scission in vitro and in vivo In addition to the initiator, reaction time, temperature and monomer/initiator(M/D)ratio were varied Reactivities of six-membered cyclic carbonates were studied and a carbonate-modified acrylic olymer was synthesized, which was expected to show good water resistance The effect of polymer chemistry on adhesion, proliferation, and morphology of human articular cartilage(HAC)was evaluated In order to study the degradation mechanism of these polycarbonates in more detail, a series of small model compounds were designed that mimic the repeat unit of the polymer. Tyrosine -PEG derived poly(ether carbonate)s were prepared by condensation copolymerization with phosgene.. Chemical structure and purity were confirmed by NMR and FTIR spectral The mechanism of decarboxylation was discussed from the viewpoint of Based on the symmetrical structure of these products, a mechanism for chain initiation and.was 根据具体内容,有时要用一般现在时或其它 The novel convergent growth approach to topological macromolecules based on dendritic fragment is described In present paper plasma methods are discussed with respect to other techniques which also nduce micropatterned cell growth 也有少部分用主动态 Our study focused on the role of poly(ethylene glycol)(PEG)in actively regulating the biological responsiveness of protein-adsorbed biomaterials. To this end, we designed PEG-variant biomaterials from a family of tyrosine/PEG-derived polycarbonate to present surfaces ranging from low to intermediate levels of PEG concentration,. We analyzed the effect of PEG concentration on the amount, conformation and bioactivity We have investigated the ability of these dendrimers to function as an effective delivery system This paper describes the synthesis and evaluation of biodegradable derivatives of poly-L-glutamic acid as suitable vectors for gene therapy 三.阐明得到了哪些主要结论2 of its thermal and mechanical properties, permeability, and susceptibility to hydrolytic chain scission in vitro and in vivo. …In addition to the initiator, reaction time, temperature, and monomer/initiator (M/I) ratio were varied. Reactivities of six-membered cyclic carbonates were studied and a carbonate-modified acrylic polymer was synthesized, which was expected to show good water resistance. The effect of polymer chemistry on adhesion, proliferation, and morphology of human articular cartilage (HAC) was evaluated. In order to study the degradation mechanism of these polycarbonates in more detail, a series of small model compounds were designed that mimic the repeat unit of the polymer. Tyrosine-PEG derived poly(ether carbonate)s were prepared by condensation copolymerization with phosgene. …Chemical structure and purity were confirmed by NMR and FTIR spectral analysis. The mechanism of decarboxylation was discussed from the viewpoint of … Based on the symmetrical structure of these products, a mechanism for chain initiation and …was proposed. 根据具体内容 有时要用一般现在时或其它 The novel convergent growth approach to topological macromolecules based on dendritic fragment is described. In present paper plasma methods are discussed with respect to other techniques which also induce micropatterned cell growth. 也有少部分用主动态 Our study focused on the role of poly(ethylene glycol) (PEG) in actively regulating the biological responsiveness of protein-adsorbed biomaterials. To this end, we designed PEG-variant biomaterials from a family of tyrosine/PEG-derived polycarbonate to present surfaces ranging from low to intermediate levels of PEG concentration, … We analyzed the effect of PEG concentration on the amount, conformation and bioactivity… We have investigated the ability of these dendrimers to function as an effective delivery system… This paper describes the synthesis and evaluation of biodegradable derivatives of poly-L-glutamic acid as suitable vectors for gene therapy. 三 阐明得到了哪些主要结论