(1) Background: Infections of pathogenic microorganisms can be life-threatening due to delayed healing or even worsening conditions in tissue engineering and regenerative medicine. The excessive presence of reactive oxygen species in damaged and infected tissues causes a negative inflammatory response, resulting in failed healing. Thus, the development of hydrogels with antibacterial and antioxidant abilities for the treatment of infectious tissues is in high demand. (2) Methods: We herein describe the development of green-synthesized silver-composited polydopamine nanoparticles (AgNPs), which are fabricated by the self-assembly of dopamine as a reducing and antioxidant agent in the presence of silver ions. (3) Results: The facile and green-synthesized AgNPs have a nanoscale diameter with mostly spherical shapes, with various shapes coexisting. The particles are stable in an aqueous solution for up to 4 weeks. In addition, remarkable antibacterial activity against Gram-positive and -negative bacterial strains and antioxidant capabilities were evaluated by in vitro assays. When incorporated into biomaterial hydrogels at concentrations above 2 mg L−1, the hydrogels produced powerful antibacterial effects. (4) Conclusions: This study describes a biocompatible hydrogel with antibacterial and antioxidant activities from the introduction of facile and green-synthesized AgNPs as a safer tool for the treatment of damaged tissues.
The purpose of this study is to investigate moderating effect of psychological flexibility on impact which students feel ambivalence over emotional expressiveness in interpersonal relationships. In summary, the results are as follows. Self-defence ambivalence is strong negative influence on subject well-being but concerned-relation ambivalence is not affect at subject well-being. Also, moderating effect of psychological flexibility in concerned-relation ambivalence is not appear on subjective well-bing while self-defence ambivalence is shown moderating effect of psychological at subjective well-being. These results are mean that concerned-relation itself contains psychological flexibility role and psychological flexibility is negative influence on self-defence ambivalence and positive influence at subjective well-being. Moderating effect of psychological flexibility is shown that as important role subjective well-being. So students will need to help accommodate an active experience in the field allow s college students to raise their own psychological flexibility.■ keyword :|Emotional Ambivalence|Psychological Flexibility|Subjective Well-being|Human Relationship|
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