نتایج جستجو برای: pdl

تعداد نتایج: 1573  

Journal: :Infection and immunity 1991
Y B Wang G R Germaine

Several previous findings have suggested that the cationic nature of lysozyme is a major factor in its bactericidal activity. Since a number of cationic proteins or peptides have been reported to cause membrane damage in bacteria, we investigated the effect of lysozyme on glucose fermentation and intracellular pH and K+ in Streptococcus mutans under conditions in which lysis does not occur. Res...

Journal: :The Journal of biological chemistry 2010
Chiharu Fujihara Satoru Yamada Nobuhiro Ozaki Nobuo Takeshita Harumi Kawaki Teruko Takano-Yamamoto Shinya Murakami

In this study, we analyzed the effects of tensile mechanical stress on the gene expression profile of in vitro-maintained human periodontal ligament (PDL) cells. A DNA chip analysis identified 17 up-regulated genes in human PDL cells under the mechanical stress, including HOMER1 (homer homolog 1) and GRIN3A (glutamate receptor ionotropic N-methyl-d-aspartate 3A), which are related to glutamate ...

2012
Minjung Song Hana Kim Yoonjeong Choi Kyungho Kim Chooryung Chung

OBJECTIVE To investigate the stem cell-like characteristics of human periodontal ligament (PDL) stromal cells outgrown from orthodontically extracted premolars and to evaluate the potential for myogenic differentiation. METHODS PDL stromal cells were obtained from extracted premolars by using the outgrowth method. Cell morphological features, self-replication capability, and the presence of c...

Journal: :European journal of orthodontics 2012
S H Jónsdóttir E B W Giesen J C Maltha

During orthodontic tooth movement, the mechanical behaviour of the extracellular matrix of the periodontal ligament (PDL) determines the cellular processes involved in turnover of the PDL and alveolar bone. This mechanical behaviour is the basis for finite element (FE) models and FE analyses. Five young adult male beagle dogs were used to test the null hypothesis that the mechanical behaviour o...

Journal: :Oral surgery, oral medicine, oral pathology, oral radiology, and endodontics 2001
Y C Chang F M Huang K W Tai M Y Chou

OBJECTIVE The objective of this study was to examine the effects of sodium hypochlorite (NaOCl) and chlorhexidine (CHx) on cultured human periodontal ligament (PDL) cells in vitro. STUDY DESIGN The effects of irrigation solutions on human PDL cells were evaluated by propidium iodide fluorescence cytotoxicity assay, protein synthesis assay, and mitochondrial activity. RESULTS Both NaOCl and ...

Journal: :Fundam. Inform. 2010
Linh Anh Nguyen Andrzej Szalas

We reformulate Pratt’s tableau decision procedure of checking satisfiability of a set of formulas in PDL. Our formulation is simpler and more direct for implementation. Extending the method we give the first ExpTime (optimal) tableau decision procedure not based on transformation for checking consistency of an ABox w.r.t. a TBox in PDL (here, PDL is treated as a description logic). We also prov...

Abtahi, S.Mostafa, Heravi, Farsin,

‌An investigation on stress distribution of the anterior maxillary‌ ‌teeth PDL during the application of intrusive forces in midline Dr. S.M. Abtahi * - Dr. F. Heravi** * - Assistant professor of Orthodontics Dept. Faculty of Dentistry Hamedan University of Medical Sciences. ** - Assistant professor of Orthodontics Dept. Faculty of Dentistry Mashhad University of Medical Sciences. Background an...

Journal: :American journal of physiology. Gastrointestinal and liver physiology 2006
Taiichi Otani Akira Matsukura Takeshi Takamoto Yasuji Seyama Yasuhito Shimizu Michiyo Shinomiya Hiroshi Usui Fred S Gorelick Masatoshi Makuuchi

To examine mechanisms that might be related to biliary pancreatitis, we examined the effects of pancreatic duct ligation (PDL) with pancreatic stimulation in vivo. PDL alone caused no increase in pancreatic levels of trypsinogen activation peptide (TAP), trypsin, or chymotrypsin and did not initiate pancreatitis. Although bombesin caused zymogen activation within the pancreas, the increases wer...

2015
Aki Takimoto Masayoshi Kawatsu Yuki Yoshimoto Tadafumi Kawamoto Masahiro Seiryu Teruko Takano-Yamamoto Yuji Hiraki Chisa Shukunami

The periodontal ligament (PDL) is a mechanosensitive noncalcified fibrous tissue connecting the cementum of the tooth and the alveolar bone. Here, we report that scleraxis (Scx) and osterix (Osx) antagonistically regulate tensile force-responsive PDL fibrogenesis and osteogenesis. In the developing PDL, Scx was induced during tooth eruption and co-expressed with Osx. Scx was highly expressed in...

Journal: :Electr. Notes Theor. Comput. Sci. 2011
Mark Kaminski Gert Smolka

PDL (propositional dynamic logic) [6, 11, 8] is an expressive modal logic invented for reasoning about programs. It extends basic modal logic with expressions called programs. Programs describe relations from states to states and are used to express modalities. Programs are composed with the operators familiar from regular expressions. In addition, they may employ formulas so that conditionals ...

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