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Naoyasu Sata

Bio: Naoyasu Sata is an academic researcher from Osaka University. The author has contributed to research in topics: Biology & Genus. The author has an hindex of 6, co-authored 29 publications receiving 140 citations.
Topics: Biology, Genus, Larva, Nematode, Anisakidae

Papers
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Journal ArticleDOI
TL;DR: In this paper, a new method for determining 1st CMC from viscosity is experimentally established, and a method of determining 2nd CMC was established by transforming and viscousity in the new variables.
Abstract: (1) Several methods of determining CMC are compared and criticised. (2) A new method of determining 1st CMC from viscosity is experimentally established. (3) A new method of determining 2nd CMC from viscosity is established by transforming and viscosity in the new variables. (4) Of each soap, characteristic constants [η1] and [η2] are discovered, and it is shown that a definite relation is concluded between these values and monomer molecular weight. (5) The theoretical explanation of these newly found phenomena has not yet been made.

37 citations

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TL;DR: In this paper, the Ultraschall-depolymerisation von polyvinylalkohol is described as einem hydrophilen Kettenpolymeren bekannter chemischer struktur in wasriger Losung untersucht.
Abstract: 1. Es wurde die Ultraschall-Depolymerisation von Polyvinylalkohol als einem hydrophilen Kettenpolymeren bekannter chemischer Struktur in wasriger Losung untersucht. 2. Neben der Untersuchung des Ultraschall-Effekts durch Viskositatsmessung wurde auch die Dispersitatsverteilung nach der Beschallung durch Diffusionsmessungen verfolgt, um uber den Wirkungsmechanismus Klarheit zu bekommen. 3. Die Viskositatserniedrigung erreicht nach einer Beschallung von 90–120 Minuten einen Grenzwert, woraus man schliesen kann, das die Ultraschall-Depolymerisation unterhalb einer bestimmten Molekulargrose nicht mehr weiter fortschreitet. 4. Durch Analyse der Diffusionskurven (Schlieren-Aufnahmen) wurde konstatiert, das das anfangs polydisperse System nach der Beschallung polymereinheitlicher wird. Danach wird vermutet, das die Ultraschall-Depolymerisation der Kettenmolekule von Polyvinylalkohol ungefahr in der Mitte der Ketten stattfindet.

15 citations

Journal ArticleDOI
01 Sep 1964
TL;DR: In this article, the results of ultrafiltration of nonionic surface active agents were obtained from the results obtained from a study conducted in aqueous solution and an ethanol solution, and they showed that the micelle volume becomes smaller with increasing amount of ethanol.
Abstract: From the results of ultrafiltration of nonionic surface active agents, we have obtained the conclusions as follows. 1: In aqueous solutions the micelle volume increases with increasing concentration of surface active agents, at least until a few percent. 2: In ethanol solutions, it seems that there are no micelles. 3: In aqueous ethanol solutions, the micelle volume becomes smaller with increasing amount of ethanol, but it is not yet clear the accurate concentration of ethanol, at which the micelle disappears.

12 citations

Journal ArticleDOI
TL;DR: The PVAz-Molekule in der Seifenlosung noch aufgelockerter gelost sind als in sogenannten guten Losungsmitteln wie Azeton as discussed by the authors.
Abstract: 1) Das an sich wasserunlosliche hochmolekulare Polyvinylazetat (PVAz) lost sich in Na-Dodecylsulfatlosung geeigneter Konzentration und ergibt vollkommen klare und bestandige Losung, namlich durch Solubilisation. 2) Je hoher der Polymerisationsgrad ist, desto groser wird die zur Solubilisation notwendige Seifenkonzentration. 3. [η] von PVAz ist in Seifenlosung groser als in Azetonlosung. Daraus kann man schliesen, das die PVAz-Molekule in der Seifenlosung noch aufgelockerter gelost sind als in sogenannten guten Losungsmitteln wie Azeton. 4. Die bisherigen Mizellen-Mechanismen fur die Solubilisation sind nicht zur Erklarung der Solubilisation hochmolekularer Substanz brauchbar, so das irgend ein neuer Mechanismus gefunden werden mus, um die Erscheinungen zu erklaren. Einige Moglichkeiten werden vorgeschlagen.

10 citations


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TL;DR: A unitary free energy of transfer from water to micelle of −15 kcal./mole has been calculated for this lipid, demonstrating the overwhelming preference of this typical biological lipid for being in a membrane environment, such as the interior of a biological membrane would provide.

220 citations

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TL;DR: The field of polymer/surfactant interaction is reviewed in this article, where results from two investigative methods, viz., dialysis and surface tension, are discussed, illustrating the main behavioral patterns and outlining the principles of the interactions.
Abstract: The field of polymer/surfactant interaction is reviewed in this work. Results from two investigative methods,viz., dialysis and surface tension, are discussed, illustrating the main behavioral patterns and outlining the principles of the interactions. Next, aspects of the interaction phenomena that appear to have relevance to detergent formulation are presented. These include solution rheology, solubility control and surface conditioning. Lastly, the importance of surface activity of the polymer itself is stressed, culminating in a discussion of the properties of hydrophobically modified water-soluble polymers (“polymeric surfactants”), both alone and in the presence of conventional surfactants.

139 citations

Journal ArticleDOI
TL;DR: In this article, a comprehensive survey of the coalescence process and numerous influencing factors is given, with particular focus on its technical relevance and application, and different coalescence modeling approaches are reviewed with ascending level of detail from empirical correlations to comprehensive film drainage models.
Abstract: Abstract The coalescence phenomenon of drops in liquid/liquid systems is reviewed with particular focus on its technical relevance and application. Due to the complexity of coalescence, a comprehensive survey of the coalescence process and the numerous influencing factors is given. Subsequently, available experimental techniques with different levels of detail are summarized and compared. These techniques can be divided in simple settling tests for qualitative coalescence behavior investigations and gravity settler design, single-drop coalescence studies at flat interfaces as well as between droplets, and detailed film drainage analysis. To model the coalescence rate in liquid/liquid systems on a technical scale, the generic population balance framework is introduced. Additionally, different coalescence modeling approaches are reviewed with ascending level of detail from empirical correlations to comprehensive film drainage models and detailed computational fluid and particle dynamics.

113 citations

Journal ArticleDOI
TL;DR: In this article, it was shown that a considerable share of the different micellar phases that potentially exist in surfactant solutions can be formed with a single perfluoro-surfactant by adding different additives to the same starting solution.

103 citations

Journal ArticleDOI
TL;DR: The observed cloud point effects are discussed according to the mechanisms involved and the only cations which do not form complexes with polyoxyethylated surfactants (and are, therefore, unable to salt them in) were the alkali metal ions sodium, potassium, and cesium and the ammonium ion.

97 citations