Papers - OSHIMA Tatsuya
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Yamasaki Yumi, Kawano Ami, Matsumoto Tomoko, Oshima Tatsuya, Yamasaki Masao
Nippon Shokuhin Kagaku Kogaku Kaishi 71 ( 3 ) 83 - 91 2024.3
Language：Japanese Publishing type：Research paper (scientific journal) Publisher：Japanese Society for Food Science and Technology
β-Cryptoxanthin is a type of carotenoid that contributes to the maintenance and improvement of human health. However, it is sensitive to heat during cooking and food processing. Furthermore, like other carotenoids, β-cryptoxanthin is also highly hydrophobic and does not readily solubilize in the gastrointestinal tract. This property results in its low bioaccessibility, and considerable knowledge has been accumulated on improving the bioavailability of β-cryptoxanthin. In this study, we evaluated the effects of different processing methods on the residual amount of β-cryptoxanthin in kumquats. The results showed that preparation of kumquat paste contained more β-cryptoxanthin than its puree. Next, when the paste was mixed with fermented <i>Aspergillus oryzae</i> milk, the β-cryptoxanthin content did not change. A pasteurization study of the kumquat paste mixed with the fermented milk showed that β-cryptoxanthin was more stable at 65 °C than at 85 °C. In addition, to improve the bioaccessibility of β-cryptoxanthin, a mixture of the fermented milk and kumquat-derived β-cryptoxanthin was evaluated using a human intestinal epithelial Caco-2 cell model. The results showed that β-cryptoxanthin in the mixture permeated the membrane 14 times more than β-cryptoxanthin alone.
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Effect of Interlayer Anions with NiZn Hydroxy Double Salts on Adsorption of Selenite, Selenate and Arsenate Reviewed
K. Ohe, R. Tabuchi, T. Oshima
Journal of Robotics, Networking and Artificial Life 10 ( 4 ) 294 - 298 2024
Language：English Publishing type：Research paper (scientific journal)
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Water-Based Synthesis of β-Sheet-Like Supramolecular Metallohydrogel Organized by Using a Native Ultrashort Peptide Sequence Reviewed
A. Inada, A. Motomura, T. Oshima
Chemistry – A European Journal 30 ( 11 ) e202303160 - e202303160 2023.11
Language：English Publishing type：Research paper (scientific journal)
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Inada Asuka, Nozaki Yuina, Sawao Ayane, Oshima Tatsuya
KAGAKU KOGAKU RONBUNSHU 49 ( 6 ) 170 - 174 2023.11
Authorship：Corresponding author Language：Japanese Publishing type：Research paper (scientific journal) Publisher：The Society of Chemical Engineers, Japan
β-cryptoxanthin (BCX) is a type of carotenoid found in citrus fruits and has been reported to promote bone metabolism and stimulate immunity. In this study, a complex between BCX and digested peptides (Pep<sub>Cas</sub>) was prepared to improve the water dispersibility of BCX. Pep<sub>Cas</sub> was obtained by enzymatic degradation of casein. The complex (BCX@Pep<sub>Cas</sub>) was prepared by mixing an ethanol solution of BCX and an aqueous solution of Pep<sub>Cas</sub>, followed by lyophilization. The apparent solubility of BCX under neutral conditions increased with increasing Pep<sub>Cas</sub> concentration. To evaluate the enhancement of oral bioavailability of BCX by the complexation, a cell membrane permeation test was conducted using a monolayer of Caco-2 cells. After pseudo-digestion, BCX in a blank sample was not permeated at all. In contrast, the permeation of BCX in BCX@Pep<sub>Cas</sub> was observed after 24 h. These results suggest that the complexation with Pep<sub>Cas</sub> improves the water dispersibility of BCX, resulting in the enhanced oral bioavailability of BCX.
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Relationship between extraction of arsenic via ion solvation and Hansen solubility parameters of extractants Reviewed
N. Matsuo, K. Ohe, T. Oshima, K. Yoshizuka
Solvent Extraction and Ion Exchange 41 940 - 957 2023.9
Authorship：Corresponding author Language：English Publishing type：Research paper (scientific journal)
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Development of solvents for Au(III) extraction in hydrochloric acid media based on ion solvation with reference to the Hansen solubility parameters: Success of dicyclohexylketone Reviewed
T. Oshima, Y. Iwakiri, A. Inada
Hydrometallugy 220 106106 - 106106 2023.6
Authorship：Lead author, Corresponding author Language：English Publishing type：Research paper (scientific journal)
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Development of amphip hilic short peptides changing drug inclusivity by metal complexation reactions Reviewed
A. Inada, M. Hitotsumatsu, T. Oshima
Journal of Chemical Engineering of Japan 56 2219291 - 2219291 2023.6
Authorship：Corresponding author Language：English Publishing type：Research paper (scientific journal)
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Extraction of Metal Ions Using a Calix[4]arene Carboxylic Acid Derivative in Aromatic Ethers Reviewed International coauthorship
T. Oshima, T. Asano, T. Ishibashi, K. Ohe, K. Ohto, Jumina
Solvent Extraction Research and Development, Japan 30 ( 1 ) 59 - 69 2023.5
Authorship：Lead author, Corresponding author Language：English Publishing type：Research paper (scientific journal)
DOI： 10.15261/serdj.30.59
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Extraction of Au(III) using aromatic ketones in acidic chloride media Reviewed
T. Oshima, K. Miyake, M. Hashizume, A. Inada
Solvent Extraction Research and Development, Japan 30 ( 2 ) 129 - 136 2023.5
Authorship：Lead author, Corresponding author Language：English Publishing type：Research paper (scientific journal)
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T. Oshima, T. Ishibashi, K. Ohto
Journal of Inclusion Phenomena and Macrocyclic Chemistry 103 71 - 79 2023.1
Authorship：Lead author, Corresponding author Language：English Publishing type：Research paper (scientific journal) Publisher：Journal of Inclusion Phenomena and Macrocyclic Chemistry
Calixarene derivatives are excellent host compounds for ionic species in liquid–liquid extraction. However, many studies using calixarene derivatives have been conducted using highly toxic chloroform as a solvent because of their poor solubility in typical hydrocarbons. In the present study, aromatic ethers were developed as solvents for calixarene derivatives to enhance their industrial applicability. The solubility of the calix[6]arene carboxylic acid derivative tOct[6]CH2COOH in 1-octoxybenzene (OB) and 1-butoxybenzene (BB) was 11.3 mM and 24.9 mM, respectively. The cationic guest molecule tryptophan methyl ester was extracted using the tOct[6]CH2COOH host in OB and BB. The cationic lysine-rich protein cytochrome c was also extracted using tOct[6]CH2COOH in BB as shown for tOct[6]CH2COOH in chloroform in previous studies. However, cytochrome c was not extracted using tOct[6]CH2COOH in OB and instead, precipitated. As tOct[6]CH2COOH stabilizes the ammonium group of biomolecules because of its suitable cavity size, the extraction of the tryptophan ester and cytochrome c using tOct[6]CH2COOH was much higher than those using the corresponding calix[4]arene and calix[8]arene derivatives. These results confirm that aromatic ethers are potential solvents for calixarene derivatives for the extraction of biomolecules.
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Shimojo K., Fujiwara I., Oshima T., Yokoyama K., Yaita T.
Analytical Sciences 38 ( 7 ) 1003 - 1006 2022.7
Language：English Publishing type：Research paper (scientific journal) Publisher：Analytical Sciences
Liquid–liquid extraction of lanthanide (Ln) ions was investigated using N,N-dioctylthiodiglycolamic acid (DOTDGAA), which is a sulfur donor ligand with an amide group and a carboxyl group connected by a thioether chain. The extraction performance and selectivity of DOTDGAA for Ln ions were compared with those of N,N-dioctyldiglycolamic acid (DODGAA), which is also an oxygen donor ligand with a similar chemical structure, to assess the effect of the soft/hard donor atom on Ln separation. DOTDGAA quantitatively extracted all Ln ions while being selective toward the light and middle Ln ions, in contrast to the selectivity of DODGAA for heavier Ln ions. Slope analysis demonstrated that the Ln3+ transfer using DOTDGAA proceeded through a proton-exchange reaction, forming a 1:3 complex, Ln(DOTDGAA)3. The back-extraction of Ln ions from the extracting phase was successfully achieved under acidic conditions. Graphical abstract: [Figure not available: see fulltext.]
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Development of aromatic ethers as solvents for a calix[6]arene derivative and extraction of amino acids and proteins Reviewed International coauthorship
Oshima T., Asano T., Inada A., Ohto K., Jumina
Journal of Inclusion Phenomena and Macrocyclic Chemistry 102 ( 5-6 ) 507 - 514 2022.6
Authorship：Lead author, Corresponding author Language：English Publishing type：Research paper (scientific journal) Publisher：Journal of Inclusion Phenomena and Macrocyclic Chemistry
Calixarene derivatives are excellent host compounds for ionic species in liquid–liquid extraction. However, many studies using calixarene derivatives have been conducted using highly toxic chloroform as a solvent because of their poor solubility in typical hydrocarbons. In the present study, aromatic ethers were developed as solvents for calixarene derivatives to enhance their industrial applicability. The solubility of the calix[6]arene carboxylic acid derivative tOct[6]CH2COOH in 1-octoxybenzene (OB) and 1-butoxybenzene (BB) was 11.3 mM and 24.9 mM, respectively. The cationic guest molecule tryptophan methyl ester was extracted using the tOct[6]CH2COOH host in OB and BB. The cationic lysine-rich protein cytochrome c was also extracted using tOct[6]CH2COOH in BB as shown for tOct[6]CH2COOH in chloroform in previous studies. However, cytochrome c was not extracted using tOct[6]CH2COOH in OB and instead, precipitated. As tOct[6]CH2COOH stabilizes the ammonium group of biomolecules because of its suitable cavity size, the extraction of the tryptophan ester and cytochrome c using tOct[6]CH2COOH was much higher than those using the corresponding calix[4]arene and calix[8]arene derivatives. These results confirm that aromatic ethers are potential solvents for calixarene derivatives for the extraction of biomolecules.
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Enhanced water dispersibility and Caco-2 cell monolayer permeability of quercetin by complexation with casein hydrolysate Reviewed
A. Inada, A. Sawao, K. Takahashi, T. Oshima
J. Food Sci. 87 1174 - 1183 2022.2
Authorship：Last author, Corresponding author Language：English Publishing type：Research paper (scientific journal)
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Adsorption Behavior of Precious Metals and Hazardous Elements on a Crosslinked Polyvinylamine Resin Reviewed
47 111 - 117 2021.7
Authorship：Corresponding author Language：Japanese Publishing type：Research paper (scientific journal)
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Dominant factors that determine the dissolution state of complexes between poorly water-soluble ingredients and casein hydrolysate Reviewed
A. Inada, T. Iwase, T. Oshima
Colloids Surf. B 208 112062 2021.5
Authorship：Last author, Corresponding author Language：English Publishing type：Research paper (scientific journal)
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Onion (Allium cepa l.)-derived nanoparticles inhibited lps-induced nitrate production, however, their intracellular incorporation by endocytosis was not involved in this effect on raw264 cells Reviewed
M. Yamasaki, Y. Yamasaki, R. Furusho, H. Kimura, I. Kamei, H. Sonoda, M. Ikeda, T. Oshima, K. Ogawa, K. Nishiyama
Molecules 26 2763 2021.5
Language：English Publishing type：Research paper (scientific journal)
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Extraction behavior of trivalent rare earth metal ions with diphosphonic acid type extraction reagent Reviewed
K. Ohto, S. Nakashima, Y. Tanaka, S. Morisada, H. Kawakita, T. Oshima
Key Engineering Materials 884 133 - 139 2021.5
Language：English Publishing type：Research paper (scientific journal)
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A Comparative Study on the Extraction of Au(III) Using Cyclopentyl Methyl Ether, Dibutyl Carbitol, and Methyl Isobutyl Ketone in Acidic Chloride Media Reviewed
T. Oshima, T. Koyama, N. Otsuki
Solvent Extraction and Ion Exchange 39 477–49 2021
Authorship：Lead author, Corresponding author Language：English Publishing type：Research paper (scientific journal)
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Extraction of Au(III) using aromatic ethers via ion solvation from acidic chloride media: structural factors that influence extraction Reviewed
T. Oshima K. Matsuzaki A. Inada K. Ohe
Separation and Purification Technology 258 118008 2020.11
Language：English Publishing type：Research paper (scientific journal)
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Y. Sakurai A. Inada M. Hitotsumatsu T. Oshima
Journal of Drug Delivery Science and Technology 59 101882 2020.7
Language：English Publishing type：Research paper (scientific journal)