• Title/Summary/Keyword: biomaterials

검색결과 1,966건 처리시간 0.043초

수용액중 납이온 제거를 위한 활성슬러지의 이용가능성에 관한 연구 (A Study on the Availability of Activated Sludge for the $Pb^{2+}$ Removal in Aqueous Solution)

  • 김동석;서정호
    • 한국환경과학회지
    • /
    • 제7권5호
    • /
    • pp.697-705
    • /
    • 1998
  • $Pb^{2+}$ removal capacity and initial $Pb^{2+}$ removal rate were compared between non-biomaterials (granular activated carbon, powdered activated carbon, ion exchange resin, zeolite) and biomaterials (activated sludge, Aureobasidium pullulans, Saccharomyces cerevisiae). The $Pb^{2+}$ removal capacity of biomaterials were greater than that of non-biomaterials, generally. The $Pb^{2+}$ removal capacities of non-biomaterials and biomaterials were shown on the order of ion exchange resin > zeolite > granular activated carbon > powdered activated carbon and A. pullulans > S. cerevisiae > activated sludge, respectively. In the initial $Pb^{2+}$ removal rate, the non-biomaterials showed powdered activated carbon > granular activated carbon > zeolite > ion exchange resin and the biomaterials showed A. pullulans > activated sludge > S. cerevisiae. Comparing the $Pb^{2+}$ removal capacity and initial $Pb^{2+}$ removal rate of activated sludge with those of other non-biomaterials and biomaterials, activated sludge may have an availability on the removal of heavy metal ions by the economical and pratical aspects.

  • PDF

구강조직유래 유도만능줄기세포-생체재료 복합체의 재생의료 동향 (Regenerative medicine using dental tissue derived induced pluripotent stem cell-biomaterials complex)

  • 전수경;이해형;김해원;이정환
    • 대한치과의사협회지
    • /
    • 제55권12호
    • /
    • pp.828-840
    • /
    • 2017
  • In recent years, many researchers and clinicians found interest in regenerative medicine using induced pluripotent stem cells (iPSCs) with biomaterials due to their pluripotency, which is able to differentiate into any type of cells without human embryo, which of use is ethically controversial. However, there are limitations to make iPSCs from adult somatic cells due to their low stemness and donor site morbidity. Recently, to overcome above drawbacks, dental tissue-derived iPSCs have been highlighted as a type of alternative sources for their high stemness, easy gathering, and their complex (ectomesenchymal) origin, which easily differentiate them to various cell types for nerve, vessel, and other dental tissue regeneration. In other part, utilizing biomaterials for regenerative medicine using cell is recently highlighted because they can modulate cell adhesion, proliferation and (de)differentiation. Therefore, this paper will convey the overview of advantages and drawbacks of dental tissue-derived iPSCs and their future application with biomaterials.

  • PDF