LIVIVO - The Search Portal for Life Sciences

zur deutschen Oberfläche wechseln
Advanced search

Search results

Result 1 - 10 of total 4110

Search options

  1. Article ; Online: The Direct Partial Oxidation of Methane to Dimethyl Ether over Pt/Y

    Vargheese, Vibin / Kobayashi, Yasukazu / Oyama, S Ted

    Angewandte Chemie (International ed. in English)

    2020  Volume 59, Issue 38, Page(s) 16644–16650

    Abstract: Using a mixture of NO + ... ...

    Abstract Using a mixture of NO + O
    Language English
    Publishing date 2020-07-21
    Publishing country Germany
    Document type Journal Article
    ZDB-ID 2011836-3
    ISSN 1521-3773 ; 1433-7851
    ISSN (online) 1521-3773
    ISSN 1433-7851
    DOI 10.1002/anie.202006020
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

  2. Article: Hydrodeoxygenation of benzofuran on novel CoPdP catalysts supported on potassium ion exchanged ultra-stable Y-zeolites

    Movick, William J. / Yun, Gwang-Nam / Vargheese, Vibin / Bando, Kyoko K. / Kikuchi, Ryuji / Oyama, S. Ted

    Journal of catalysis. 2021 Nov., v. 403

    2021  

    Abstract: The synthesis of bimetallic CoPdP phosphides supported on potassium ion exchanged ultra-stable Y ...

    Abstract The synthesis of bimetallic CoPdP phosphides supported on potassium ion exchanged ultra-stable Y (KUSY) zeolites was studied and catalytic activity tests on the hydrodeoxygenation of a model pyrolysis oil compound, benzofuran, were conducted. Temperature programmed reduction (TPR) profiles revealed that Pd aided the reduction of the Co, lowering both the onset and peak temperatures for reduction. The catalyst structure was probed by X-ray diffraction (XRD) and extended X-ray adsorption fine structure (EXAFS), which showed the formation of CoPdP alloys. Fourier-transform infrared spectroscopy was used to probe the Co and Pd sites on the surface. Several Co:Pd ratios were tested in the range of 225–350 °C at a medium pressure of 0.5 MPa. Synergistic effects were observed between Co and Pd, with the alloys showing higher activity than the single metal Pd or Co phosphide catalysts. High selectivity to unsaturated high carbon number products were obtained for the bimetallic phosphide catalysts.
    Keywords Fourier transform infrared spectroscopy ; X-radiation ; X-ray diffraction ; adsorption ; carbon ; catalysts ; catalytic activity ; models ; phosphides ; potassium ; pyrolysis oils ; temperature ; zeolites
    Language English
    Dates of publication 2021-11
    Size p. 160-172.
    Publishing place Elsevier Inc.
    Document type Article
    ZDB-ID 1468993-5
    ISSN 1090-2694 ; 0021-9517
    ISSN (online) 1090-2694
    ISSN 0021-9517
    DOI 10.1016/j.jcat.2021.01.023
    Database NAL-Catalogue (AGRICOLA)

    More links

    Kategorien

  3. Article ; Online: A case of obstructive jaundice with severe hypercholesterolemia probably due to lipoprotein-Y.

    Murano, Takeyoshi / Oyama, Tomokazu / Miyashita, Yoh / Shirai, Kohji

    Journal of atherosclerosis and thrombosis

    2008  Volume 15, Issue 5, Page(s) 276–280

    Abstract: ... to lipoprotein-Y that was increased in obstructive jaundice. ...

    Abstract Aim: We analyzed the lipoproteins of a patient with pancreatic cancer causing obstructive jaundice, with marked hypercholesterolemia.
    Methods: The patient was a 49-year-old female. Serum total cholesterol, triglyceride, LDL-cholesterol and HDL-cholesterol levels were 1,170 mg/dL, 282 mg/dL, 1,070 mg/dL and 53 mg/dL, respectively. Cholesterol ester and lecithin:cholesterol acyltransferase decreased, and so-called remnant like particle-cholesterol increased remarkably.
    Results: Fractionation of the patient's serum by polyacrylamide gel disc electrophoresis showed an abundant VLDL fraction, whereas agarose gel electrophoresis demonstrated a high level of beta-lipoprotein. Sepharose 6B gel filtration of the serum revealed that the levels of free cholesterol and apolipoprotein B were high in the VLDL- corresponding fraction.
    Conclusion: The results suggested that the high cholesterol level was due to the presence of abnormally large particles rich in free cholesterol and apoB, and this abnormal fraction may correspond to lipoprotein-Y that was increased in obstructive jaundice.
    MeSH term(s) Apolipoproteins B/blood ; Cholesterol/blood ; Electrophoresis ; Female ; Humans ; Hypercholesterolemia/diagnosis ; Hypercholesterolemia/etiology ; Jaundice, Obstructive/diagnosis ; Jaundice, Obstructive/etiology ; Lipids/blood ; Lipoproteins, LDL/blood ; Middle Aged ; Pancreatic Neoplasms/complications
    Chemical Substances Apolipoproteins B ; Lipids ; Lipoproteins, LDL ; Cholesterol (97C5T2UQ7J)
    Language English
    Publishing date 2008-10-31
    Publishing country Japan
    Document type Case Reports ; Journal Article
    ZDB-ID 2011474-6
    ISSN 1880-3873 ; 1340-3478
    ISSN (online) 1880-3873
    ISSN 1340-3478
    DOI 10.5551/jat.e559
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

  4. Article ; Online: Perceptual-Speech, Nasometric, and Cephalometric Results After Modified V-Y Palatoplasties With or Without Mucosal Graft.

    Oyama, Kentaro / Nishihara, Kazuhide / Matsunaga, Kazuhide / Miura, Naoko / Kibe, Toshiro / Nakamura, Norifumi

    The Cleft palate-craniofacial journal : official publication of the American Cleft Palate-Craniofacial Association

    2016  Volume 53, Issue 4, Page(s) 469–480

    Abstract: ... patients who underwent modified V-Y palatoplasty with a mucosal graft on the nasal side for symmetrical ... muscular reconstruction during 2006-2012 (MG group) and 109 patients who previously underwent modified V-Y ... Conclusions: Modified V-Y palatoplasty combined with a mucosal graft on the nasal side of the velum ...

    Abstract Objective: Although the goal of cleft palate (CP) repair is to achieve normal speech, no standard procedure ensures that patients' speech will be at the same level as speech in children without CP. In this study, postoperative speech outcomes following primary CP repair combined with or without a mucosal graft was analyzed in comparison with that of control subjects without CP.
    Participants: Eighty-two patients who underwent modified V-Y palatoplasty with a mucosal graft on the nasal side for symmetrical muscular reconstruction during 2006-2012 (MG group) and 109 patients who previously underwent modified V-Y palatoplasty without a mucosal graft (non-MG group) were enrolled in this study. Speech data on 37 Japanese subjects without CP were used as a control.
    Main outcome measures: Perceptual rating of resonance and nasal emission and nasometry were carried out for all participants. Furthermore, cephalometric analyses were performed to assess postoperative velopharyngeal morphology and velar movement.
    Results: Normal resonance was achieved at a significantly higher rate (90.3% of patients) in the MG group than in the non-MG group (68.8%) (P < .01). The mean nasalance scores in the MG group were significantly lower (P < .01) and were almost at the same level as in controls. Cephalometric analyses revealed a greater velar length and velar elevation angle during phonation in the MG group (P < .01 and P < .05, respectively).
    Conclusions: Modified V-Y palatoplasty combined with a mucosal graft on the nasal side of the velum for symmetrical muscular reconstruction facilitates speech outcomes for children with cleft palate that are comparable with those for peers without CP.
    Language English
    Publishing date 2016-07
    Publishing country United States
    Document type Journal Article
    ZDB-ID 1069409-2
    ISSN 1545-1569 ; 0009-8701 ; 1055-6656
    ISSN (online) 1545-1569
    ISSN 0009-8701 ; 1055-6656
    DOI 10.1597/14-141
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

  5. Article ; Online: A specific insertion of a solo-LTR characterizes the Y-chromosome of Bryonia dioica (Cucurbitaceae).

    Oyama, Ryan K / Silber, Martina V / Renner, Susanne S

    BMC research notes

    2010  Volume 3, Page(s) 166

    Abstract: ... has been observed on the Y-chromosomes of some species with heteromorphic sex chromosomes ... Recombination, by which transposable elements are removed, is suppressed on at least part of the emerging Y ... transposable element enrichment.: Findings: We sequenced 2321 bp of the Y-chromosome in Bryonia dioica that flank ...

    Abstract Background: Relatively few species of flowering plants are dioecious and even fewer are known to have sex chromosomes. Current theory posits that homomorphic sex chromosomes, such as found in Bryonia dioica (Cucurbitaceae), offer insight into the early stages in the evolution of sex chromosomes from autosomes. Little is known about these early steps, but an accumulation of transposable element sequences has been observed on the Y-chromosomes of some species with heteromorphic sex chromosomes. Recombination, by which transposable elements are removed, is suppressed on at least part of the emerging Y-chromosome, and this may explain the correlation between the emergence of sex chromosomes and transposable element enrichment.
    Findings: We sequenced 2321 bp of the Y-chromosome in Bryonia dioica that flank a male-linked marker, BdY1, reported previously. Within this region, which should be suppressed for recombination, we observed a solo-LTR nested in a Copia-like transposable element. We also found other, presumably paralogous, solo-LTRs in a consensus sequence of the underlying Copia-like transposable element.
    Conclusions: Given that solo-LTRs arise via recombination events, it is noteworthy that we find one in a genomic region where recombination should be suppressed. Although the solo-LTR could have arisen before recombination was suppressed, creating the male-linked marker BdY1, our previous study on B. dioica suggested that BdY1 may not lie in the recombination-suppressed region of the Y-chromosome in all populations. Presence of a solo-LTR near BdY1 therefore fits with the observed correlation between retrotransposon accumulation and the suppression of recombination early in the evolution of sex chromosomes. These findings further suggest that the homomorphic sex chromosomes of B. dioica, the first organism for which genetic XY sex-determination was inferred, are evolutionarily young and offer reference information for comparative studies of other plant sex chromosomes.
    Language English
    Publishing date 2010-06-14
    Publishing country England
    Document type Journal Article
    ZDB-ID 2413336-X
    ISSN 1756-0500 ; 1756-0500
    ISSN (online) 1756-0500
    ISSN 1756-0500
    DOI 10.1186/1756-0500-3-166
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

  6. Article ; Online: Simultaneous correction of deviated columella and wide nostril floor using the Y-V advancement in unilateral cleft lip nasal deformities.

    Kiya, Koichiro / Oyama, Tomoki / Taniguchi, Maki / Hosokawa, Ko

    Journal of plastic, reconstructive & aesthetic surgery : JPRAS

    2014  Volume 67, Issue 5, Page(s) 721–724

    Abstract: ... floor was inserted into the side wall of the columella using the Y-V advancement. By suturing ...

    Abstract Here, we describe an operative method for the simultaneous correction of deviated columella and wide nostril floor in unilateral cleft lip nasal deformities. The V-shaped flap of the affected nostril floor was inserted into the side wall of the columella using the Y-V advancement. By suturing the anterocaudal septum, which is often deviated to the unaffected side, with the subcutaneous tissue of the affected alar base, it was possible to simultaneously reposition the columellar base in the midline as well as narrow the wide nostril floor. This method was technically simple, with low invasiveness for the septal cartilage. Furthermore, as noted in one of the two cases described, it would enable the reconstruction of the natural shape of the nostril sill.
    MeSH term(s) Adolescent ; Child, Preschool ; Cleft Lip/surgery ; Female ; Humans ; Nasal Septum/abnormalities ; Nasal Septum/surgery ; Reconstructive Surgical Procedures/methods ; Surgical Flaps
    Language English
    Publishing date 2014-05
    Publishing country Netherlands
    Document type Case Reports ; Journal Article
    ZDB-ID 2217750-4
    ISSN 1878-0539 ; 1748-6815 ; 0007-1226
    ISSN (online) 1878-0539
    ISSN 1748-6815 ; 0007-1226
    DOI 10.1016/j.bjps.2013.12.006
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

  7. Book ; Online: Global path preference and local response

    Oyama, Yuki

    A reward decomposition approach for network path choice analysis in the presence of locally perceived attributes

    2023  

    Abstract: This study performs an attribute-level analysis of the global and local path preferences of network travelers. To this end, a reward decomposition approach is proposed and integrated into a link-based recursive (Markovian) path choice model. The approach ...

    Abstract This study performs an attribute-level analysis of the global and local path preferences of network travelers. To this end, a reward decomposition approach is proposed and integrated into a link-based recursive (Markovian) path choice model. The approach decomposes the instantaneous reward function associated with each state-action pair into the global utility, a function of attributes globally perceived from anywhere in the network, and the local utility, a function of attributes that are only locally perceived from the current state. Only the global utility then enters the value function of each state, representing the future expected utility toward the destination. This global-local path choice model with decomposed reward functions allows us to analyze to what extent and which attributes affect the global and local path choices of agents. Moreover, unlike most adaptive path choice models, the proposed model can be estimated based on revealed path observations (without the information of plans) and as efficiently as deterministic recursive path choice models. The model was applied to the real pedestrian path choice observations in an urban street network where the green view index was extracted as a visual street quality from Google Street View images. The result revealed that pedestrians locally perceive and react to the visual street quality, rather than they have the pre-trip global perception on it. Furthermore, the simulation results using the estimated models suggested the importance of location selection of interventions when policy-related attributes are only locally perceived by travelers.
    Keywords Physics - Physics and Society ; Computer Science - Machine Learning ; Economics - Econometrics
    Subject code 006
    Publishing date 2023-07-14
    Publishing country us
    Document type Book ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

    More links

    Kategorien

  8. Article ; Online: Diversidad genética y estructura de poblaciones de pavos domésticos mexicanos

    Rigoberto López-Zavala / Horacio Cano-Camacho / Omar Chassin-Noria / Ken Oyama / Gerardo Vázquez-Marrufo / María Guadalupe Zavala-Páramo

    Revista Mexicana de Ciencias Pecuarias, Vol 4, Iss 4, Pp 417-

    2013  Volume 434

    Abstract: En este estudio se analizaron niveles de diversidad y estructura genética de 144 guajolotes ... domesticados de poblaciones de traspatio de las cinco regiones fisiográficas de Michoacán y 16 guajolotes ... por Análisis de Varianza Molecular fueron bajos entre poblaciones (14 % domesticados y 6 % silvestres) y altos ...

    Abstract En este estudio se analizaron niveles de diversidad y estructura genética de 144 guajolotes domesticados de poblaciones de traspatio de las cinco regiones fisiográficas de Michoacán y 16 guajolotes de dos poblaciones silvestres del centro de México utilizados como grupo externo de referencia, mediante siete loci de microsatélites. En guajolotes domesticados el promedio de heterocigosidad fue moderado (0.535 ± 0.285) comparado con silvestres (0.701 ± 0.068). Los guajolotes domesticados mostraron diferenciación entre poblaciones (FST= 0.122) a través de los loci. Los porcentajes de diferenciación estimados por Análisis de Varianza Molecular fueron bajos entre poblaciones (14 % domesticados y 6 % silvestres) y altos dentro de las poblaciones (86 % domesticados y 94 % silvestres). Los análisis de similitud mostraron la formación de un grupo con guajolotes silvestres y dos grupos basales con domesticados; un grupo basal incluyó tres subgrupos con poblaciones de las regiones Bajío, Faja Volcánica Transversal y Balsas, y un segundo grupo basal incluyó dos subgrupos con poblaciones de las regiones Sierra y Costa. El análisis de estructura genética mostró tres grupos para guajolotes domesticados y uno para silvestres. Una prueba de Mantel mostró aislamiento por patrón de distancia (r=0.84, P<0.05) entre poblaciones domesticadas. Los grupos genéticos de guajolotes domesticados fueron congruentes con los datos morfométricos previamente obtenidos de la misma población; un grupo correspondió a poblaciones de Bajío y Balsas (morfometría intermedia), el segundo grupo incluyó a la población de Faja Volcánica Transmexicana (grandes y pesados), y el tercer grupo correspondió a poblaciones de Sierra y Costa (ligeros y pequeños).
    Keywords Animal culture ; SF1-1100 ; Veterinary medicine ; SF600-1100
    Language English
    Publishing date 2013-01-01T00:00:00Z
    Publisher Instituto Nacional del Investigaciones Forestales, Agrícolas y Pecuarias
    Document type Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

    More links

    Kategorien

  9. Article ; Online: Mutant Huntingtin reduces HSP70 expression through the sequestration of NF-Y transcription factor.

    Yamanaka, Tomoyuki / Miyazaki, Haruko / Oyama, Fumitaka / Kurosawa, Masaru / Washizu, Chika / Doi, Hiroshi / Nukina, Nobuyuki

    The EMBO journal

    2008  Volume 27, Issue 6, Page(s) 827–839

    Abstract: ... we show that mutant Huntingtin aggregates interact with the components of the NF-Y transcriptional factor ... lysates showed reduction in NF-Y binding to the promoter region of HSP70, one of the NF-Y targets. RT-PCR ... analysis revealed reduced HSP70 expression in these brains. We further clarified the importance of NF-Y ...

    Abstract In Huntington's disease (HD), mutant Huntingtin, which contains expanded polyglutamine stretches, forms nuclear aggregates in neurons. The interactions of several transcriptional factors with mutant Huntingtin, as well as altered expression of many genes in HD models, imply the involvement of transcriptional dysregulation in the HD pathological process. The precise mechanism remains obscure, however. Here, we show that mutant Huntingtin aggregates interact with the components of the NF-Y transcriptional factor in vitro and in HD model mouse brain. An electrophoretic mobility shift assay using HD model mouse brain lysates showed reduction in NF-Y binding to the promoter region of HSP70, one of the NF-Y targets. RT-PCR analysis revealed reduced HSP70 expression in these brains. We further clarified the importance of NF-Y for HSP70 transcription in cultured neurons. These data indicate that mutant Huntingtin sequesters NF-Y, leading to the reduction of HSP70 gene expression in HD model mice brain. Because suppressive roles of HSP70 on the HD pathological process have been shown in several HD models, NF-Y could be an important target of mutant Huntingtin.
    MeSH term(s) Animals ; CCAAT-Binding Factor/antagonists & inhibitors ; CCAAT-Binding Factor/metabolism ; Cell Line, Tumor ; Disease Models, Animal ; HSP70 Heat-Shock Proteins/antagonists & inhibitors ; HSP70 Heat-Shock Proteins/biosynthesis ; HSP70 Heat-Shock Proteins/genetics ; Huntingtin Protein ; Huntington Disease/genetics ; Huntington Disease/metabolism ; Male ; Mice ; Mice, Transgenic ; Mutation ; Nerve Tissue Proteins/genetics ; Nerve Tissue Proteins/physiology ; Nuclear Proteins/genetics ; Nuclear Proteins/physiology ; Protein Binding/genetics
    Chemical Substances CCAAT-Binding Factor ; HSP70 Heat-Shock Proteins ; Htt protein, mouse ; Huntingtin Protein ; Nerve Tissue Proteins ; Nuclear Proteins
    Language English
    Publishing date 2008-02-21
    Publishing country England
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 586044-1
    ISSN 1460-2075 ; 0261-4189
    ISSN (online) 1460-2075
    ISSN 0261-4189
    DOI 10.1038/emboj.2008.23
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

  10. Article ; Online: Estructura y diferenciación genética de poblaciones silvestres y domesticadas de chile del noroeste de México analizada con isoenzimas y rapds

    Sergio Hernández Verdugo / Antonio González Rodríguez / Pedro Sánchez Peña / Alejandro Casas / Ken Oyama

    Revista Fitotecnia Mexicana, Vol 29, Iss Es2, Pp 25-

    2006  Volume 29

    Abstract: The structure and genetic variation of 18 wild and three domesticated populations of pepper (Capsicum annuum L.) from northwestern México were determined by isozymes and RAPDs. The isozyme analysis was based on 12 polymorphic loci from nine isozymes. All ...

    Abstract The structure and genetic variation of 18 wild and three domesticated populations of pepper (Capsicum annuum L.) from northwestern México were determined by isozymes and RAPDs. The isozyme analysis was based on 12 polymorphic loci from nine isozymes. All populations showed high genetic variation (A = 2.72, P = 90.8 %, He = 0.445 for wild populations; and A = 2.60, P = 84.6 %, He = 0.404, for domesticated populations). Most genetic variation occurred within rather than among populations. However, genetic differentiation was greater among domesticated (GST = 0.167) than among wild (GST = 0.056) populations. The RAPDs analysis performed with ten primers produced a total of 166 bands, all polymorphic in wild populations. Out of 126 bands, 125 were polymorphic in domesticated populations. Mean percentage of polymorphism was 34.2 and 34.7 % in wild and domesticated populations, respectively. Mean and total genetic diversity were 0.069 and 0.165 for wild populations, and 0.081 and 0.131 for domesticated populations. AMOVA showed that total genetic diversity was equally distributed among (50.0 and 48.9 %) and within (50.0 and 51.1 %) of both, wild and domesticated populations. Wild and domesticated populations were clearly differentiated in the UPGMA dendrogram built from isozymes data (average GD = 0.182), as well as by AMOVA (17.2 % of variance was among populations types, P ≤ 0.001). The considerable genetic distances found among varieties (average GD = 0.212 with isozimes) suggest that genetic changes associated with domestication have occurred in different directions.
    Keywords Botany ; QK1-989 ; Science ; Q ; Agriculture (General) ; S1-972 ; Agriculture ; S
    Subject code 580
    Language Spanish
    Publishing date 2006-01-01T00:00:00Z
    Publisher Sociedad Mexicana de Fitogenética
    Document type Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

    More links

    Kategorien

To top