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N Satou

Publications and source records attributed to N Satou.

At least 37 records · Page 2Linked to original sources
PubMed1989

In vitro color change of composite-based resins.

The adsorption of staining materials to resin restoratives was considered to be influenced by the physico-chemical properties of the resin-based monomers. To study the effects of the surface characteristics of resins on staining, we prepared five visible-light-cured experimental resins without fillers. Staining of these resins was colorimetrically measured. The staining solutions used were the Oil Orange and the Food Red 3 solutions. With the Oil Orange solution, the materials with higher hydrophobicity showed higher staining. With the Food Red 3 solution, the materials with higher water sorption showed higher staining.

Color↗
PubMed1989

[Enhanced effect of hepatic arterial infused anticancer drugs on rabbit VX-2 carcinoma by means of combination with Lipiodol. Adriamycin versus Lipiodol adriamycin sandwich method and adriamycin suspended in a Lipiodol].

To increase drug delivery to a hepatic malignant tumor, various tissue contents and serum levels of adriamycin (ADR) were evaluated in comparison with different intraarterial injection methods of oily or aqueous solution. VX-2 tumor was implanted in the rabbit liver. ADR was infused through the hepatic artery by the following three methods: Group 1: ADR with physiological saline; Group 2: ADR administered between lipiodol injection; and Group 3: urographin-dissolved ADR suspended in lipiodol. ADR concentrations of the tumor, liver, heart, kidney or bone marrow were compared between these three groups one hour after ADR administration. Tumor uptake and ADR concentration ratio of tumor to liver were higher in Group 3 than in the other two groups. ADR concentration ratio of tumor to liver was higher in group 2 than in group 1. Cardiac and renal uptake in group 3 was less than in group 1 and 2, and so infusion of ADR suspended in a lipiodol may serve to reduce side effects of ADR, especially cardiotoxicity.

Animals↗
PubMed1989

Non-specific adherence of Candida species to surface-modified glass.

The nature of the physicochemical forces involved in the adherence of Candida species to a solid surface was investigated using modified glass slides. It was found that hydrophobic yeasts adhered to hydrophobic surfaces mainly by hydrophobic interactions, whereas in less hydrophobic yeasts electrostatic interactions seemed to play a more important role in adherence to the solid phase.

Candida↗
PubMed1988

Adherence of streptococci to surface-modified glass.

Four types of surface-modified glass were prepared. Aminopropyl glass was prepared by alkylsilylation of glass slides with gamma-aminopropyltriethoxysilane. This glass carries primary amino groups which may be protonated at pH 7.2. Owing to the presence of both positively charged ions and hydrophobic ethoxyl groups, the glass is considered to be amphipathic. Three other types of surface-modified glass slides were prepared from aminopropyl glass by forming Schiff's bases with three aldehydes: glucose, glyoxylic acid and hexanal. The aldehyde-treated slides were subsequently reduced using sodium borohydride. Thus, the surface of the glass was rendered hydrophilic, ampholytic or hydrophobic, respectively. The adherence of two Streptococcus sanguis strains and two Streptococcus mutans strains to the surface-modified glass slides was studied. Different strains showed differences in adherence to these slides depending on their physico-chemical surface properties. For S. sanguis ATCC 10556, hydrophobic bonds seemed to be most important, while in S. mutans OMZ 176, ionic interactions made the highest contribution to adhesion. Hydrogen bonds seemed to contribute least to adherence.

Bacterial Adhesion↗
PubMed1988

Streptococcal adherence on various restorative materials.

The adherence of Streptococcus sanguis ATCC 10556, S. sanguis ATCC 10557, S. mutans Ingbritt, and S. mutans OMZ 176 to the surfaces of composite resins, amalgam alloys, and a Au-Ag-Pd alloy was measured. Adhesion was correlated with values for hydrophobicity and zeta-potential of the bacteria and the restorative materials. The hydrophobicity of the restoratives showed a positive correlation between the numbers of adherent S. sanguis cells, suggesting that hydrophobic interactions are important for the adherence of this bacterial species. In contrast, the numbers of adherent S. mutans cells showed a positive correlation with the zeta-potential of the restoratives, suggesting that electrostatic interactions are important in adherence of this bacterium.

Bacterial Adhesion↗