Aomori Prefectural Industrial Technology Research Center

Aomori Shi, Japan

Aomori Prefectural Industrial Technology Research Center

Aomori Shi, Japan
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Hirose T.,Aomori Prefectural Industrial Technology Research Center | Kushibiki M.,Aomori Prefectural Industrial Technology Research Center
Mokuzai Gakkaishi/Journal of the Japan Wood Research Society | Year: 2011

Effects of activation temperature on yield, ash content, specific surface area and moisture absorption of activated carbon made from pruned apple branches with an air-based activation method were investigated, and these characteristics were compared with activated carbon from Cryptomeria japonica. The results are as follows: The yield at activation temperature of 900° from pruned apple branches was lowest, and was lower than that of Cryptomeria japonica, while the ash yield was higher than that of Cryptomeria japonica. The specific surface area at activation temperature of 900° from pruned apple branches was highest, and based on converted ash yield was higher than that of Cryptomeria japonica. Moisture adsorption of activated carbon from pruned apple branches increased with rising relative humidity and activation temperature, and based on converted ash yield was higher than that of Cryptomeria japonica. © 2011, The Japan Wood Research Society. All rights reserved.


PubMed | Nagasaki Prefectural Beef Cattle Improvement Center, Gifu Prefectural Livestock Research Institute, Tottori Animal Husbandry Experiment Station, National Livestock Breeding Center and 10 more.
Type: Journal Article | Journal: PLoS genetics | Year: 2015

Recessive skeletal dysplasia, characterized by joint- and/or hip bone-enlargement, was mapped within the critical region for a major quantitative trait locus (QTL) influencing carcass weight; previously named CW-3 in Japanese Black cattle. The risk allele was on the same chromosome as the Q allele that increases carcass weight. Phenotypic characterization revealed that the risk allele causes disproportional tall stature and bone size that increases carcass weight in heterozygous individuals but causes disproportionately narrow chest width in homozygotes. A non-synonymous variant of FGD3 was identified as a positional candidate quantitative trait nucleotide (QTN) and the corresponding mutant protein showed reduced activity as a guanine nucleotide exchange factor for Cdc42. FGD3 is expressed in the growth plate cartilage of femurs from bovine and mouse. Thus, loss of FDG3 activity may lead to subsequent loss of Cdc42 function. This would be consistent with the columnar disorganization of proliferating chondrocytes in chondrocyte-specific inactivated Cdc42 mutant mice. This is the first report showing association of FGD3 with skeletal dysplasia.


Morinaga Y.,Aomori University of Health and Welfare | Iwai K.,Aomori University of Health and Welfare | Tomita H.,Shimokita Food Research Institute | Takaya Y.,Meijo University | And 2 more authors.
Food Science and Technology Research | Year: 2010

A high-concentration (20%) antihypertensive peptide solution with angiotensin I-converting enzyme (ACE) inhibitory activity was prepared from the powder of the jellyfish Stomolophus nomurai, a plague of which had recently hit Japan's fishing industry, using the drum dryer method. Three active fractions, Fr. 3-1, Fr. 3-3, and Fr. 3-6, were isolated from the peptide mixture by step-wise elution by Sep-Pak Vac C 18 and further fractionated by high-performance liquid chromatography twice. The sequences of Fr. 3-1, Fr. 3-3, and Fr. 3-6 were determined as IGDEPLANYL, FGGIDDINQIGQSD, and YYAPFE, respectively. The most active peptide was identified with the synthetic peptide YYAPFE by sequence analysis, MALDITOF MS, and NMR spectra. Further, YYAPFQ, designed and synthesized on the basis of YYAPFE, showed the highest ACE inhibitory activity in vitro among YYAPFE, YYAPF, YYAP, YYA, and YY; however, its effect on systolic blood pressure showed a similar tendency to that of YYAPFE in spontaneously hypertensive rats.


Abe T.,Hirosaki University | Ichikawa M.,Hirosaki University | Hikage T.,Hirosaki University | Kakuta S.,Aomori Prefectural Industrial Technology Research Center | Nagai K.,Tokyo Institute of Technology
Chemical Physics Letters | Year: 2012

A composite of p-type poly(3-hexylthiophene-2,5-diyl) (P3HT) and n-type phenyl-C 61-butyric-acid-methyl ester (PCBM) was prepared and first applied to a photoelectrode in the water phase. The composite formed on a base electrode exhibited only photoanodic characteristics in the presence of an electron donor. Based on a microscopic image, the p/n composite formed at the substrate side and most of the P3HT maldistributed near the surface were responsible for the specified charge transfer. Supporting this morphology, the photoanodic characteristics were further enhanced by the combination of p-type zinc phthalocyanine (oxidation catalyst working in the dark) with the composite surface. © 2012 Elsevier B.V. All rights reserved.


Alabia I.D.,Hokkaido University | Saitoh S.-I.,Hokkaido University | Igarashi H.,Japan Agency for Marine - Earth Science and Technology | Ishikawa Y.,Japan Agency for Marine - Earth Science and Technology | And 4 more authors.
ICES Journal of Marine Science | Year: 2016

Neon flying squid (Ommastrephes bartramii) is a large pelagic squid internationally harvested in the North Pacific. Here, we examined its potential habitat in the central North Pacific using an ensemble modelling approach. Initially, ten statistical models were constructed by combining the squid fishing points, selected vertical layers of the sea temperature and salinity, sea surface height (SSH), and SSH gradient from the multi-variate ocean variational estimation system for the western North Pacific from June to July 1999-2011. The variable selection analyses have captured the importance of vertical temperature and salinity layers at the upper 300 and 440 m, respectively, coinciding with the reported vertical ranges of diel migration for the squid's primary prey species in the North Pacific. The evaluation of the habitat predictions using the independent sets of the presence data from 2012 to 2014 showed significant variability in the predictive accuracy, which is likely reflective of the interannual differences in environmental conditions across the validation periods. Our findings from ensemble habitat model approach using three-dimensional oceanographic data were able to characterize the near- and subsurface habitats of the neon flying squid. Moreover, our results underpinned the possible link between interannual environmental variability and spatio-temporal patterns of potential squid habitats. As such, these further suggest that an ensemble model approach could present a promising tool for operational fishery application and squid resource management. © 2016 International Council for the Exploration of the Sea 2016. All rights reserved.


Alabia I.D.,Hokkaido University | Saitoh S.-I.,Hokkaido University | Igarashi H.,Japan Agency for Marine - Earth Science and Technology | Ishikawa Y.,Japan Agency for Marine - Earth Science and Technology | And 4 more authors.
ICES Journal of Marine Science | Year: 2016

Climate-driven changes in the marine ecosystem largely influence the distribution, abundance, and the consequent availability of marine resources to the fishery. In this study, we examined the potential habitat distributions of the neon flying squid (Ommastrephes bartramii) under the projected impacts of ocean warming. We used the sea surface temperature (SST) from the three CMIP5 climate scenarios (RCP4.5, RCP6.0, and RCP8.5) with the low to high future emissions. Based on the squid habitat models, SST showed the highest effect on the present potential squid habitat distribution that accounted for at least 60% of the predicted spatial patterns from May to July 2000-2010. This result underpinned the species' high sensitivity to the temperature changes in its feeding environments. Moreover, the projected future potential squid habitats revealed pronounced differences in the spatial and temporal patterns relative to the present habitat distributions across the different regions of the western and central North Pacific. The future squid habitat predictions revealed a net reduction in the suitable squid habitat coupled with the corresponding northward habitat retreat. Moreover, the magnitude of the predicted habitat changes was proportional to the levels of warming for the representative periods from May to July 2025, 2050, and 2100. The highest decrease in the spatial extent and poleward retreat of the potential squid habitat were observed from May to July 2100 under the RCP 8.5 scenario. These trends could translate to shorter squid fishing periods and offshore shifts of the squid fishing grounds. Thus, insights into the future spatio-temporal patterns and trajectories of the potential squid habitats could lend important implications on the availability of squid resources to the fishery and subsequent evaluation of squid fishery management options under climate change. © International Council for the Exploration of the Sea 2015. All rights reserved.


Alabia I.D.,Hokkaido University | Saitoh S.-I.,Hokkaido University | Mugo R.,Regional Development Centre | Igarashi H.,Japan Agency for Marine - Earth Science and Technology | And 5 more authors.
Fisheries Oceanography | Year: 2015

We explored the seasonal potential fishing grounds of neon flying squid (Ommastrephes bartramii) in the western and central North Pacific using maximum entropy (MaxEnt) models fitted with squid fishery data as response and environmental factors from remotely sensed [sea surface temperature (SST), sea surface height (SSH), eddy kinetic energy (EKE), wind stress curl (WSC) and numerical model-derived sea surface salinity (SSS)] covariates. The potential squid fishing grounds from January-February (winter) and June-July (summer) 2001-2004 were simulated separately and covered the near-coast (winter) and offshore (summer) forage areas off the Kuroshio-Oyashio transition and subarctic frontal zones. The oceanographic conditions differed between regions and were regulated by the inherent seasonal variability and prevailing basin dynamics. The seasonal and spatial extents of potential squid fishing grounds were largely explained by SST (7-17°C in the winter and 11-18°C in the summer) and SSS (33.8-34.8 in the winter and 33.7-34.3 in the summer). These ocean properties are water mass tracers and define the boundaries of the North Pacific hydrographic provinces. Mesoscale variability in the upper ocean inferred from SSH and EKE were also influential to squid potential fishing grounds and are presumably linked to the augmented primary productivity from nutrient enhancement and entrainment of passive plankton. WSC, however, has the least model contribution to squid potential fishing habitat relative to the other environmental factors examined. Findings of this work underpin the importance of SST and SSS as robust predictors of the seasonal squid potential fishing grounds in the western and central North Pacific and highlight MaxEnt's potential for operational fishery application. © 2015 John Wiley & Sons Ltd.


PubMed | Meteorological Research Institute, Hokkaido University, Regional Development Centre, Kyoto University and 2 more.
Type: Journal Article | Journal: PloS one | Year: 2015

We identified the pelagic habitat hotspots of the neon flying squid (Ommastrephes bartramii) in the central North Pacific from May to July and characterized the spatial patterns of squid aggregations in relation to oceanographic features such as mesoscale oceanic eddies and the Transition Zone Chlorophyll-a Front (TZCF). The data used for the habitat model construction and analyses were squid fishery information, remotely-sensed and numerical model-derived environmental data from May to July 1999-2010. Squid habitat hotspots were deduced from the monthly Maximum Entropy (MaxEnt) models and were identified as regions of persistent high suitable habitat across the 12-year period. The distribution of predicted squid habitat hotspots in central North Pacific revealed interesting spatial and temporal patterns likely linked with the presence and dynamics of oceanographic features in squids putative foraging grounds from late spring to summer. From May to June, the inferred patches of squid habitat hotspots developed within the Kuroshio-Oyashio transition zone (KOTZ; 37-40N) and further expanded north towards the subarctic frontal zone (SAFZ; 40-44N) in July. The squid habitat hotspots within the KOTZ and areas west of the dateline (160W-180) were likely influenced and associated with the highly dynamic and transient oceanic eddies and could possibly account for lower squid suitable habitat persistence obtained from these regions. However, predicted squid habitat hotspots located in regions east of the dateline (180-160W) from June to July, showed predominantly higher squid habitat persistence presumably due to their proximity to the mean position of the seasonally-shifting TZCF and consequent utilization of the highly productive waters of the SAFZ.


Kakuta S.,Aomori Prefectural Industrial Technology Research Center | Numata T.,Aomori Prefectural Industrial Technology Research Center | Okayama T.,Aomori Prefectural Industrial Technology Research Center
Catalysis Science and Technology | Year: 2014

The relationship between the photocatalytic activity of goethite (α-FeOOH) and the shape of its particles was investigated. Goethite particles with various morphologies (rod-like, array-like, and pancake-like) were synthesized through the hydrolysis of a ferric nitrate solution or the oxidation of Fe(OH)2. All the particles synthesized consisted of {110} and {021} facets. The photocatalytic activities of the different samples were examined for the decomposition of acetaldehyde under irradiation. It was found that the photocatalytic activity of goethite is affected by both the shape and the specific surface area of its particles. Further investigation of the effects of the particle shape indicated that the photocatalytic activity of the {021} facets is higher than that of the {110} facets of goethite. The goethite particles (short rod-like and pancake-like particles), therefore, exhibited higher photocatalytic activities than other particle types (long rod-like and array-like particles) owing to the greater {021} facets. © 2014 The Royal Society of Chemistry.


Akahira A.,Aomori Prefectural Industrial Technology Research Center
Nihon Kikai Gakkai Ronbunshu, B Hen/Transactions of the Japan Society of Mechanical Engineers, Part B | Year: 2010

A study has been made to clarify the performance of road heating system using waste heat of fuel cell. It is important for fuel cell system to improve the general efficiency, therefore, the study suggests that the exhaust heat from polymer electrolyte fuel cell (PEFC) in utilized by a road heating system and develops the novel heat utilization system. In a road heating system, required temperature of hot water is between 10°C and 30°C ; exhaust heat of PEFC can be used as heat source because the exhaust heat temperature is more than 60°C. Experiments on a prototype system were conducted to investigate the system performance. The results show that the total efficiency of proposed road heating system is higher than that of conventional system by 7% ; the proposed system is effective in snowy cold region.

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