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81.
82.
气动技术的发展及在新领域中的应用 总被引:8,自引:5,他引:8
从SMC研发的新产品,可以了解到气动技术正朝着节能、环保、机电一体化等方向发展。半导体/微电子制造业、生物工程、医药等已成为气动技术全新的应用领域。 相似文献
83.
A highly crosslinked composite dextran-based scaffold (named DexFoam) was tailored to overcome specific deficiencies of polymeric and ceramic bone scaffolds and to guarantee a bone-mimicking microenvironment for the proliferation of human mesenchymal stem cells in vitro. The creep resistance for up to 90% compressive stain, the capability to regain the original shape after deformation, and the good thermal stability in both physiological and “body limit” conditions make DexFoam a valid alternative to the currently available bone scaffolds. Histopathological evaluation for host reaction and tissue colonization of DexFoam scaffold, implanted subcutaneously in mice, demonstrated its in vivo biocompatibility and biodegradability. 相似文献
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85.
《Planning》2019,(4)
临床流行病学是在临床医学领域内引入现代流行病学和统计学方法,从患病个体诊治扩大到患病群体研究,以探讨疾病病因、预防、诊断、治疗、预后等规律的临床基础学科。循证医学的核心思想是通过检索、评价和应用证据,结合医生技术经验和患者的具体情况,经医患共同决策作出符合患者需求的利大于弊的诊疗决定。加拿大McMaster大学的David Sackett及其学生Gorden Guyatt先后对临床流行病学这门学科的建立、完善和传播,对循证医学概念的提出、发展和推动,起到了里程碑式的作用。20世纪80年代初,我国第一批追随David Sackett的医生方法学家引入了临床流行病学的核心思想,即临床研究的设计、测量和评价,90年代又引入了循证医学的理念。30年来,临床流行病学和循证医学在我国生根、发芽、开花、结果,对我国现代医学的发展起到了巨大推动作用。在全面建设"健康中国"的新时代,加强临床流行病学和循证医学的学科建设刻不容缓。 相似文献
86.
S. I. Correia H. Pereira J. Silva-Correia C. N. Van Dijk J. Espregueira-Mendes J. M. Oliveira R. L. Reis 《Journal of the Royal Society Interface》2014,11(92)
Tissue engineering and regenerative medicine (TERM) has caused a revolution in present and future trends of medicine and surgery. In different tissues, advanced TERM approaches bring new therapeutic possibilities in general population as well as in young patients and high-level athletes, improving restoration of biological functions and rehabilitation. The mainstream components required to obtain a functional regeneration of tissues may include biodegradable scaffolds, drugs or growth factors and different cell types (either autologous or heterologous) that can be cultured in bioreactor systems (in vitro) prior to implantation into the patient. Particularly in the ankle, which is subject to many different injuries (e.g. acute, chronic, traumatic and degenerative), there is still no definitive and feasible answer to ‘conventional’ methods. This review aims to provide current concepts of TERM applications to ankle injuries under preclinical and/or clinical research applied to skin, tendon, bone and cartilage problems. A particular attention has been given to biomaterial design and scaffold processing with potential use in osteochondral ankle lesions. 相似文献
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88.
Herbal medicines are now commonly used all over the world and this has increased global demand. Quality, safety, and efficacy of these drugs have become a serious concern. This review presents the medicinal plants cited in folklore that are used to treat gastrointestinal ulcers. Electronic databases, that is, Web of Science, PubMed, Scopus, and Google Scholar were searched to identify the gastroprotective effects of each plant. Ethnopharmacological studies have reported various botanical products with antiulcer activities, but there has been limited scientific research, presenting clinical data to validate the efficacy and safety of medicinal herbs as gastroprotective agents. Most studies centered on pharmacological properties of medicinal herbs as used animals models. This information has prompted us to compile a list of the medicinal herbs cited in folklore with gastroprotective activity. 相似文献
89.
《Progress in Polymer Science》2014,39(12):1973-1986
Regenerative medicine involves interdisciplinary biomimetic approaches for cell therapy and tissue regeneration, employing the triad of cells, signals, and/or scaffolds. Remarkably, the field of therapeutic cells has evolved from the use of embryonic and adult stem cells to the use of induced pluripotent stem cells. For application of these cells in regenerative medicine, cell fate needs to be carefully controlled via external signals, such as the physical properties of an artificial extracellular matrix (ECM) and biologically active molecules in the form of small molecules, peptides, and proteins. It is therefore crucial to develop biomimetic scaffolds, reflecting the nanoenvironment of three-dimensional (3D) ECM in the body. Here, we describe in situ-forming injectable hydrogel systems, prepared using a variety of chemical crosslinkers and/or physical interactions, for application in regenerative medicine. Selective and fast chemical reactions under physiological conditions are prerequisites for in situ formation of injectable hydrogels. These hydrogels are attractive for regenerative medicine because of their ease of administration, facile encapsulation of cells and biomolecules without severe toxic effects, minimally invasive treatment, and possibly enhanced patient compliance. Recently, the Michael addition reaction between thiol and vinyl groups, the click reaction between bis(yne) molecules and multiarm azides, and the Schiff base reaction have been investigated for generation of injectable hydrogels, due to the high selectivity and biocompatibility of these reactions. Noncovalent physical interactions have also been proposed as crosslinking mechanisms for in situ forming injectable hydrogels. Hydrophobic interactions, ionic interactions, stereocomplex formation, complementary pair formation, and host–guest interactions drive the formation of 3D polymeric networks. In particular, supramolecular hydrogels have been developed using the host–guest chemistry of cyclodextrin (CD) and cucurbituril (CB), which allows highly selective, simple, and biocompatible crosslinking. Molecular recognition and complex formation of supramolecules, without the need for additional additives, have been successfully applied to the 3D network formation of polymer chains. Finally, we review the current state of the art of injectable hydrogel systems for application in regenerative medicine, including cell therapy and tissue regeneration. 相似文献
90.
《Current Opinion in Solid State & Materials Science》2017,21(2):92-112
Gold nanoparticles (AuNPs) have arisen a lot of interest in the clinical realms of nanomedicine. Despite the large advances made in cancer research using AuNPs, their use in tissue engineering and regenerative medicine (TERM) is still in its infancy. Herein, it is discussed the properties, functionalization, and emerging use of AuNPs as a multifunctional and multimodal platform for drug delivery, phototherapy, diagnostic and cell imaging purposes. Moreover, the recent reports related to the ability of AuNPs to enhance stem cell differentiation for bone tissue engineering, to enhance the mechanical and adhesive properties of scaffolds and surface topography to guide cell behaviors are addressed. 相似文献