Lead-free piezoelectric (Na 0.5 K 0.5 )NbO 3 (NKN) thin films were fabricated on SiO 2 /Si
substrates by sol–gel process. The NKN precursor solution was prepared from Na-ethoxide, K-…

The skin photoaging is characterized by keratinocyte hyperproliferation and degradation of
collagen fibers, causing skin wrinkling and laxity and melanocyte proliferation that leads to …

Lead-free (Na 0.5 K 0.5) NbO 3 (NKN) powders and thin films were fabricated from stoichiometric
(Na/K= 50/50), 4 mol% excess (52/52, 53/51, and 55/49), and 10 mol% excess (55/55, …

Lead-free KNbO 3 (KN) powder was fabricated by sol–gel process from metal alkoxides. KN
precursor solutions were prepared by different preparation conditions such as the order of …

The skin photoaging is an inevitable process that occurs in daily life. It is characterized by
acceralated keratinocyte proliferation and degradation of collagen fibers, causing skin …

Mast cells are widely distributed in the connective tissue of the body, but are particularly
prominent in tissues such as skin. An increased number of mast cells can be found in the dermis …

Aging of skin is characterized by skin wrinkling, laxity, and pigmentation induced by several
environmental stress factors. Histological changes during the photoaging of skin include …

Glutamate decarboxylase (GAD) catalyzes the synthesis of γ-aminobutyric acid (GABA), an
inhibitory neurotransmitter, from glutamate. An expression of GAD protein has been reported …

Transcriptional activity of nuclear factor κB (NF-κB) is induced by environmental signals
including inflammation, UV irradiation and oxidative stress. It was shown that the NF-κB activity …

Periodontal diseases are a major public health problem affecting over half of the adult
population worldwide. Lipopolysaccharide (LPS) produced by the periodontopathic bacterium …