WorldCat Identities

Cheng, Jianjun

Overview
Works: 67 works in 72 publications in 2 languages and 121 library holdings
Genres: Dictionaries  Conference papers and proceedings  History 
Roles: Author, Editor
Classifications: RS180.C5, 495.131
Publication Timeline
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Most widely held works by Jianjun Cheng
Responsive biomaterials for biomedical applications : March 24-28, 2008, San Francisco, California, USA( )

1 edition published in 2008 in English and held by 11 WorldCat member libraries worldwide

Zhong yuan wen hua da dian( Book )

2 editions published in 2008 in Chinese and held by 7 WorldCat member libraries worldwide

Ben shu nei rong bao kuo:min jian kou tou wen xue,Min jian yu le you yi,Min jian gong yi mei shu
Zhongguo min jian ni cai su ji cheng by Jianjun Cheng( Book )

2 editions published in 2013 in Chinese and held by 6 WorldCat member libraries worldwide

Ben shu jie shao le jun xian ni su de yuan yuan,Fen lei,Zhi zuo gong yi,Dai biao zuo pin deng xin xi,Yi tu wen bing mao de xing shi,Qian xian yi dong de yu yan,Rong zi liao xing,Yan jiu xing,Jian shang xing wei yi ti.Zhi zai tong guo quan mian xiang jin de jie shao tui dong zhong guo min jian ni cai yi shu wen hua qiang jiu,Bao hu gong cheng
Shennong ben cao jing shu by Xiyong Miao( Book )

1 edition published in 2011 in Chinese and held by 5 WorldCat member libraries worldwide

Ben shu gong san shi juan, Juan yi, Juan er you<xu xu li> shang, Xia, <xu xu li> shang you lun wen san shi yu pian ji zhu bing ying ji yao zong li, <xu xu li> xia wei yin yang biao li xu shi men, Wu zang liu fu men, Liu yin men, Fu ren men, Xiao er men, Wai ke deng ge ke zhu zheng yong yao, Juan san zhi juan wu wei yu shi bu, Juan liu zhi juan shi yi wei cao bu, Juan shi er zhi juan shi si wei mu bu, Juan shi wu wei ren bu, Juan shi liu zhi juan shi ba wei shou bu, Juan shi jiu wei qin bu, Juan er shi zhi juan er shi er wei chong yu bu, Juan er shi san wei guo bu, Juan er shi si zhi juan er shi liu wei mi gu bu, Juan er shi qi zhi juan er shi jiu wei cai bu, Juan san shi wei bu yi. Mei wei yao lie you"shu", "zhu zhi can hu", "jian wu"deng xiang
Ying zao yi jiang by Jianjun Cheng( Book )

2 editions published in 2014 in Chinese and held by 5 WorldCat member libraries worldwide

Ben shu yi zhong guo wen hua ji da cheng zhe<zhou yi> zhe xue si xiang wei ji ben xian suo, Tan tao zhong guo gu dai jian zhu de wen hua te zheng ji qi nei han. Zhu yao chan shu le zhong guo gu dai jian zhu de she ji si xiang, Li lun yu fang fa, Zhi zai tan tao zhong guo gu dai jian zhu de gui hua she ji ying hao yi jiang
Guang zhou nan hai shen miao by Jianjun Cheng( Book )

2 editions published in 2015 in Chinese and held by 4 WorldCat member libraries worldwide

Ben shu yi jian yao wen zi he da liang jing mei tu pian, Xiang xi xuan chuan, Jie shao le guang zhou yi dong yue 25 gong li de guang zhou nan hai shen miao de yuan qi, Jian zao, Fa zhan, Yan bian;Jie shao le zuo wei hai shang si chou zhi lu jian zheng de guang zhou nan hai shen miao jian zhu de feng ge, Dang di de feng tu ren qing, Wen ren mo ke liu xia de gu ji ji nan hai shen miao zhong de bei lin deng
Dian fen gong yi xue( Book )

1 edition published in 2011 in Chinese and held by 3 WorldCat member libraries worldwide

Ben shu gong qi zhang, Jie shao le dian fen ji chu zhi shi, Dian fen ji dian fen chan pin de sheng chan he jian ce ji shu, Bao kuo dian fen jie gou, Dian fen li hua xing zhi, Dian fen de zhi qu, Dian fen tang sheng chan, Bian xing dian fen zhi bei, Dian fen fa jiao chan pin yi ji dian fen de jian ce ji shu
Gu jian yi yun : Ling nan gu jian zhu lao zhao pian xuan ji( Book )

1 edition published in 2013 in Chinese and held by 3 WorldCat member libraries worldwide

Ben shu shou lu xuan bian le ling nan di qu de li shi jian zhu lao zhao pian san bai yu fu, An nei rong zhu ti hui bian wei wu ge bu fen:jian zhu, Liang jia dou gong, Jian zhu zhuang xiu, Jian zhu zhuang shi, Jian zhu yi shu
Zi ren sheng mo : Ling nan li shi jian zhu ce hui tu xuan ji( Book )

1 edition published in 2013 in Chinese and held by 3 WorldCat member libraries worldwide

Ben shu shou lu xuan bian le ling nan di qu zhu yao shi guang dong, Gang ao di qu de li shi jian zhu zhong de 13 ge jian zhu lei xing de ce hui zi liao, He bian wei 9 ge bu fen
Amino acid N-carboxyanhydrides and polypeptides: Controlled polymerization, properties and applications by Hua Lu( )

1 edition published in 2011 in English and held by 2 WorldCat member libraries worldwide

Li gong ke da xue sheng ren wen she hui ke xue zhi shi 2000 ti( Book )

1 edition published in 2006 in Chinese and held by 2 WorldCat member libraries worldwide

Ben shu shou lu le shi tao li gong ke da xue sheng ren wen she hui ke xue zhi shi, Bing fu you can kao da an, Yi bian da xue sheng xue xi wen xue, Li shi, Zhe xue, Yin le deng fang mian zhi shi
Polymers as directing agents for motions of chemical and biological species by Nihan Yonet Tanyeri( )

1 edition published in 2011 in English and held by 2 WorldCat member libraries worldwide

This thesis involves descriptions of solid surface modifications with various polymeric materials which were used as a guiding agent for motion of chemical and biological species. Quasi-two dimensional poly(oligoethylene glycol) acrylate polymer brush based molecular conduits have been designed with the goal of regulating and controlling the diffusive transport of molecular, e.g. organic dyes, and ionic species, e.g. AuCl4-, and Cu2+ ions, along predefined 2-D pathways. The transport of these chemical species has been examined by both fluorescence and dark field microscopy. The polymer brushes were formed through microcontact printing of an initiator, followed by surface-initiated Atom Transfer Radical Polymerization (SI-ATRP). SI-ATRP enables both 2-D patterning with a resolution of about 1 micrometer, and control over the resultant polymer brush thickness (which was varied from 10-100 nm). A hydrophilic poly(oligoethylene glycol) acrylate brushe was selected because of its potential to dissolve a wide range of hydrophilic species. The transport of fluorescent species can be directly followed. A non-lithographic fabrication method was developed for microfluidic devices used in the diffusion studies. Singular channel microfluidic device was utilized to study the directed organic dye diffusion. The AuCl4-, and Cu2+ ion transport was studied by designing molecular devices with two microfluidic channels. We have demonstrated that the various species of interest diffuse much more rapidly along the predefined pathway than along the bare (polymer brush free) regions of the substrate, demonstrating that diffusive conduits for molecular transport can indeed be formed. The protein resistance of poly(N-isopropylacrylamide) (PNIPAM) brushes grafted from silicon wafers was investigated as a function of the chain molecular weight, grafting density, and temperature. Above the lower critical solution temperature (LCST) of 32°C, the collapse of the water swollen chains, determined by ellipsometry, depends on the grafting density and molecular weight. Ellipsometry, radio assay, and fluorescence imaging demonstrated that, below the LCST, the brushes repel protein as effectively as oligoethylene oxide terminated monolayers. Above 32°C, very low levels of protein adsorb on densely grafted brushes, and the amounts of adsorbed protein increase with decreasing brush grafting densities. Brushes that do not exhibit a collapse transition also bind protein, even though the chains remain extended above the LCST. These findings suggest possible mechanisms underlying protein interactions with end-grafted PNIPAM brushes. 3D porous materials on solid surfaces were built to mimic the corneal basement membrane so that we can monitor direction of the corneal epithelia cells behaviors as the surface topography changes. We have used colloidal crystal templating approach to build the 3D porous structures. Polystyrene (PS) colloids were crystallized in a flow cell. The crystals were filled with acrylamide precursor (including photoinitiator, crosslinker) in the oxygen free aqueous solution. After polymerization of acrylamide under UV exposure, PS colloids were dissolved in chloroform. Thus, 3D porous polyacrylamide hydrogels have been fabricated. The various pore sizes at the 3D porous surface have been obtained by using PS colloids with the colloid diameters ranging from 450 nm to 4000 nm. Human corneal epithelial cell growth, morphology change and adhesion studies have been conducted on the porous polyacrylamide scaffolds. The effect of pore size on human corneal epithelial cell function has been investigated
Guangzhou Nanhai shen miao by Jianjun Cheng( Book )

1 edition published in 2018 in Chinese and held by 2 WorldCat member libraries worldwide

Design of advanced reverse osmosis and nanofiltration membranes for water purification by Chaoyi Ba( )

1 edition published in 2010 in English and held by 2 WorldCat member libraries worldwide

Most commercially available reverse osmosis (RO) and nanofiltration (NF) membranes are based on the thin film composite (TFC) aromatic polyamide membranes. However, they have several disadvantages including low resistance to fouling, low chemical and thermal stabilities and limited chlorine tolerance. To address these problems, advanced RO/NF membranes are being developed from polyimides for water and wastewater treatments. The following three projects have resulted from my research. (1) Positively charged and solvent resistant NF membranes. The use of solvent resistant membranes to facilitate small molecule separations has been a long standing industry goal of the chemical and pharmaceutical industries. We developed a solvent resistant membrane by chemically cross-linking of polyimide membrane using polyethylenimine. This membrane showed excellent stability in almost all organic solvents. In addition, this membrane was positively charged due to the amine groups remaining on the surface. As a result, high efficiency (> 95%) and selectivity for multivalent heavy metal removal was achieved. (2) Fouling resistant NF membranes. Antifouling membranes are highly desired for ⁰́all⁰́₊ applications because fouling will lead to higher energy demand, increase of cleaning and corresponding down time and reduced life-time of the membrane elements. For fouling prevention, we designed a new membrane system using a coating technique to modify membrane surface properties to avoid adsorption of foulants like humic acid. A layer of water-soluble polymer such as polyvinyl alcohol (PVA), polyacrylic acid (PAA), polyvinyl sulfate (PVS) or sulfonated poly(ether ether ketone) (SPEEK), was adsorbed onto the surface of a positively charged membrane. The resultant membranes have a smooth and almost neutrally charged surface which showed better fouling resistance than both the positively charged NF membranes and commercially available negatively charged NTR-7450 membrane. In addition, these membranes showed high efficiency for removal of multivalent ions (> 95% for both cations and anions). Therefore, these antifouling surfaces can be potentially used for water softening, water desalination and wastewater treatment in a membrane bioreactor (MBR) process. (3) Thermally stable RO membranes. Commercial RO membranes cannot be used at temperature higher than 45°C due to the use of polysulfone substrate, which often limits their applications in industries. We successfully developed polyimides as the membrane substrate for thermally stable RO membranes due to their high thermal resistance. The polyimide-based composite polyamide membranes showed desalination performance comparable to the commercial TFC membrane. However, the key advantage of the polyimide-based membrane is its high thermal stability. As the feed temperature increased from 25oC to 95oC, the water flux increased 5 - 6 times while the salt rejection almost kept constant. This membrane appears to provide a unique solution for hot water desalination and also a feasible way to improve the water productivity by increasing the operating temperature without any drop in salt rejection
Su wen zhi jie by Shizong Gao( Book )

1 edition published in 2014 in Chinese and held by 2 WorldCat member libraries worldwide

Ben shu shi " su wen " de zhu shi ben, nei rong fen wei 9 juan." su wen " 81 pian, yuan yi que " ci fa " " ben bing " 2 pian, hou gao shi yue ma shi " ling shu " zhu 9 juan, zhi di shi juan, bu " ci fa " " ben bing " liang lun, gao shi sui jiang 2 pian bu yi yu shu zhong, bing jia yi zhu shi
Zhong wai dian gu da ci dian( Book )

1 edition published in 1989 in Chinese and held by 2 WorldCat member libraries worldwide

Shou ci 6,500 yu tiao. fu: zi shun ci mu suo yin, fen lei ci mu suo yin
Synthesis and application of biomaterials containing the 1,3,5-triazaadamantane moiety or functionalized alginate by Richard Kohman( )

1 edition published in 2010 in English and held by 2 WorldCat member libraries worldwide

This thesis describes the synthesis and study of novel biomaterials. This work can be broadly divided into two groups of projects based on the compounds and materials that were used. The first group involves a class of compounds called substituted 1,3,5-triazaadamantanes (TAAs). Formed from the condensation between tris(aminomethyl)methane and substituted benzaldehydes, these compounds possess tunable degradation rates that depend on the substituents on the aromatic aldehydes. TAAs possess a branched architecture that was utilized in a variety of projects. TAA monomers were synthesized that were used for the preparation of degradable dendrimers. Using an iterative, divergent strategy, dendrimers up to three generations were synthesized that contained 39 TAA monomer units, displayed 81 functional groups on its periphery, and had a molecular weight above 35 kDa. End group modification with propargyl alcohol initiated hyperbranched polyglycerol rendered the compounds water soluble creating nanomaterials capable of encapsulating and releasing small molecule guests. Water soluble TAA cross-linkers were used to make degradable hydrogels by performing photo initiated polymerization and in situ cross-linking with hydrophilic monomers. Hydrogel degradation rates depended on the cross-linker used with degradation times varying from less than one day to as long as several months. Gels discs were implanted in chicken embryos and shown to be nontoxic and were shown to release protein in a controlled fashion. Finally, TAA cross-linkers were also reacted with low molecular weight polyethyleneimine (PEI) to synthesize degradable gene delivery vehicles. Degradable PEIs had varying gene delivery efficiencies and cell toxicities based on the cross-linker used. A polymer was made that produced comparable gene delivery efficiency to high molecular weight PEI, a standard in polymeric gene delivery, but with significantly lower toxicity. The second group of projects involves the synthesis of hydrogels from polyethylene glycol and alginate. Both polymers can be synthetically functionalized to allow gel formation under physiological conditions, without the addition of reagents, and without the production of by-products. Photoresponsive gels have also been made that degrade upon exposure to light. This material can be patterned and post functionalized to display desired chemical cues
Autonomic healing of low-velocity impact damage in woven fiber-reinforced composites by Amit J Patel( )

1 edition published in 2011 in English and held by 2 WorldCat member libraries worldwide

Polymer-matrix fiber-reinforced composites have seen increasing use in applications requiring high specific strength and stiffness. These materials typically show excellent in-plane properties but are particularly susceptible to transverse impacts. Impact can significantly reduce strength and the extent of damage can grow under cyclic loading conditions. Because this type of damage often occurs below the surface, hidden from inspection, it is especially critical in structural applications. Traditionally, impact damage repair techniques have focused on increased factors of safety or use of toughened polymer matrices. In this work, a microcapsule-based self-healing epoxy is used in woven fiber-reinforced composite panels for the repair of matrix damage imparted by low-velocity impact. The initial work focused on self-healing in plain 2D woven S2 glass laminates with an epoxy matrix. The self-healing components, dicyclopentadiene (DCPD) microcapsules and wax-encapsulated first generation Grubbs' catalyst microspheres, were premixed into the liquid epoxy, and panels are fabricated using a hand layup technique and compression molding. Low-velocity impact damage was introduced to these panels by drop-weight impact testing. To visually assess the damage state, cracks on sections through the impact damage were marked with fluorescent dye penetrant. A 51% reduction in total crack length per imaged edge was observed for self-healing panels when compared to non-healing controls, indicating filling of damage with healed material. A reduction in damage resistance was also observed upon inclusion of both self-healing components. Recovery of mechanical properties after healing was investigated by conducting compression-after-impact tests. Self-healing panels showed full recovery of residual compressive strength up to a threshold impact energy nearly double that of non-healing controls. Above this threshold impact energy, residual compressive strength was partially recovered to a degree that diminished with increasing impact energy. The work on self-healing 2D woven composites indicated that catalyst microspheres significantly reduced damage resistance, while microcapsules did not have the same detrimental effect on damage resistance. Thus, potential improvements by the use of catalyst microspheres encapsulated by poly(urea-formaldehyde) (UF) were explored. To investigate the effect of encapsulating catalyst microspheres with UF on the mechanical properties, UF encapsulated wax microspheres were fabricated and investigated. Tapered double cantilever beam samples containing these UF encapsulated wax microspheres showed better mode I fracture toughness than samples containing wax microspheres. In addition, composite panels containing DCPD microcapsules and UF encapsulated microspheres exhibited higher impact damage resistance. The recovery of impact damage in 3D orthogonal woven composites was also explored. Low-velocity impact damage in 2D plain woven and 3D orthogonal woven glass/epoxy composites was compared by developing and implementing a semi-automated crack measurement program to obtain a statistical measure of damage state for both types of panels. The results indicate a modest reduction in total delamination length, total delamination cross-sectional area, and delamination separation in 3D composite panels compared to 2D woven composite panels. These findings are attributed to toughening mechanisms associated with through-thickness z-tow reinforcement. Self-healing functionality is incorporated into 3D orthogonal woven glass/epoxy composites via an aqueous impregnation suspension containing DCPD microcapsules and urea-formaldehyde encapsulated Grubbs' catalyst microspheres. The pre-impregnated fabric is infused with an epoxy matrix using vacuum bag resin infusion. A protocol based on double cantilever impact of beam samples and flexure after impact is used to characterize mechanical recovery. The lack of recovery of self-healing beam samples in four-point flexure after impact tests highlights the current challenges of incorporating a microcapsule-based DCPD-Grubbs' catalyst self-healing system into a 3D woven composite. An estimate of healing agent delivered to the crack plane indicated inadequate healing agent delivery to significantly fill the damage separations that were measured. In addition, it was demonstrated that the polymerization propagation distance of DCPD from the ruptured catalyst microspheres was insufficient to heal damage in regions where fiber tows overlapped. Finally, lap shear tests demonstrated that the adhesion of poly-DCPD to the epoxy matrix was significantly lower than the adhesion of the epoxy matrix to itself. This relatively poor adhesion limited the achievable recovery
Statistical imaging of transport in complex fluids: a journey from entangled polymers to living cells by Bo Wang( )

1 edition published in 2011 in English and held by 2 WorldCat member libraries worldwide

Combining advanced fluorescence imaging, single particle tracking, and quantitative analysis in the framework of statistical mechanics, we studied several transport phenomena in complex fluids with nanometer and millisecond resolution. On the list are diffusion of nanoparticles and vesicles in crowded environments, reptational motion of polymers in entangled semidilute solutions, and active endosome transport along microtubules in living cells. We started from individual trajectories, and then converged statistically to aggregate properties of interests, with special emphasis on the fluctuations buried under the classic mean-field descriptions. The unified scientific theme behind these diversified subjects is to examine, with experiments designed as direct as possible, the commonly believed fundamental assumptions in those fields, such as Gaussian displacements in Fickian diffusion, harmonic confining potential of virtual tubes in polymer entanglements, and bidirectional motion of active intra-cellular transport. This series of efforts led us to discoveries of new phenomena, mechanisms, and concepts. This route, we termed as ⁰́statistical imaging⁰́₊, is expected to be widely useful at studying dynamic processes, especially in those emerging fields at the overlap of physics and biology
Direct-write assembly of 3D microperiodic scaffolds for tissue engineering applications by Sara T Parker( )

1 edition published in 2010 in English and held by 2 WorldCat member libraries worldwide

 
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