检索结果-南通市图书馆

Open Journal of Geology 2012年第1期2卷 1-13页

作者： Rabindra Nath Hota Pallavi Chatterjee Adhikari Anketika Mohanty wataru maejima 不详

The succession of lithofacies of a part of the Barakar Formation of the Singrauli coalfield has been studied by statistical techniques. The lithologies have been grouped under five facies states viz. coarse-, medium-, and fine-grained sandstones, shale and coal for statistical analyses. Markov chain analysis indicates the arrangement of Barakar lithofacies in the form of fining-upward cycles. A complete cycle consists of conglomerate or coarse-grained sandstone at the base sequentially succeeded by medium- and fine-grained sandstones, shales and coal seam at the top. The entropy analysis puts the Barakar cycles in A-4 type of cyclicity, which consists of different proportions of lower-, side- and upper-truncated cycles of lithologic states. Regression analysis indicates a sympathetic relationship between total thickness of strata (net subsidence) and number of coal cycles and an antipathic relationship between average thickness and number of coal cycles. The cyclic sedimentation of the Barakar Formation was controlled by autocyclic process, which occurred due to the lateral migration of streams triggered by intrabasinal differential subsidence. In many instances, the clastic sediments issued from the laterally migrating rivers interrupted the sedimentation resulting in thinner cycles in areas where the numbers of cycles are more. Principal component and multivariate regression analyses suggest that the net subsidence of the basin is mostly controlled by number and thickness of sandstone beds and coal seams.

关键词： Cyclic Sedimentation Markov Chain Analysis Entropy Analysis Regression Analysis Principal Component Analysis Barakar Formation Singrauli Coalfield

Provenance Variability during Damuda Sedimentation in the Talchir Gondwana Basin, India – A Statistical Assessment

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

International Journal of Geosciences 2011年第2期2卷 120-137页

作者： Rabindra Nath Hota Bijay Kumar Das Madhusmita Sahoo wataru maejima 不详

The Talchir Gondwana basin houses the Talchir Formation at the base, succeeded by the Damuda Group and the Kamthi Formation in upward progression. The present study is an attempt to determine the provenance of the Damuda Group and its variability in terms of location, climate and tectonism through time from the composition of sandstone grains and detritus of the constituent Karharbari, Barakar and Barren Measures formations. The Damuda sandstones are composed of variable amounts of monocrystalline undulatory, nonundulatory and polycrystalline quartz grains, potash and plagioclase feldspars as well as metamorphic and sedimentary rock fragments in addition to heavy accessories. Palaeocurrent studies suggest that the Eastern Ghats Supergroup lying to the south of the basin served as the source area of the Damuda sediments. Plots of sandstone composition in tectonic setting discrimination diagrams suggest derivation of the detritus from craton interior, continental block and recycled orogen provinces. Statistical analyses indicate significant differences in the detrital modes of the sandstones of the Karharbari, Barakar and Barren Measures formations, which may be attributed to temporal and spatial variation of the provenance coupled with climate change in commensurate with Damuda sedimentation.

关键词： Provenance Damuda Group Talchir Gondwana Basin Statistics

New aspects of a small GTPase RAB35 in brain development and function

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Neural Regeneration Research 2025年第7期20卷 1971-1980页

作者： Ikuko maejima Ken Sato Laboratory of Molecular Traffic Institute for Molecular and Cellular RegulationGunma UniversityMaebashiJapan

In eukaryotic cells,organelles in the secretory,lysosomal,and endocytic pathways actively exchange biological materials with each other through intracellular membrane trafficking,which is the process of transporting the cargo of proteins,lipids,and other molecules to appropriate compartments via transport vesicles or *** processes are strictly regulated by various small GTPases such as the RAS-like in rat brain(RAB)protein family,which is the largest subfamily of the RAS *** of membrane trafficking affects tissue homeostasis and leads to a wide range of diseases,including neurological disorders and neurodegenerative ***,it is important to understand the physiological and pathological roles of RAB proteins in brain ***35,a member of the RAB family,is an evolutionarily conserved protein in metazoans.A wide range of studies using cultured mammalian cells and model organisms have revealed that RAB35 mediates various processes such as cytokinesis,endocytic recycling,actin bundling,and cell ***35 is also involved in neurite outgrowth and turnover of synaptic *** generated brain-specific Rab35 knockout mice to study the physiological roles of RAB35 in brain development and *** mice exhibited defects in anxiety-related behaviors and spatial ***,RAB35 is required for the precise positioning of pyramidal neurons during hippocampal development,and thereby for normal hippocampal *** contrast,layer formation in the cerebral cortex occurred superficially,even in the absence of RAB35,suggesting a predominant role for RAB35 in hippocampal development rather than in cerebral cortex *** studies have suggested an association between RAB35 and neurodegenerative diseases,including Parkinson's disease and Alzheimer's *** this review,we provide an overview of the current understanding of subcellular functions of *** also provide insights into the phys

关键词： endocytosis endosomes hippocampal development neurodegenerative diseases RAB35

Phase transition in Pd_(40)Ni_(10)Cu_(30)P_(20) bulk metallic glass under HP & HT

在线全文

学校读者我要写书评

暂无评论

Science China(Physics,Mechanics & Astronomy) 2005年第6期48卷 716-722页

作者： Utsumi wataru Okada Taku Synchrotron Radiation Research Center Japan Atomic Energy Research Institute 1-1-1 Kout Mikasuki Sayo Hyogo 679-5148 Japan

The phase transitions in Pd40Ni10Cu30P20 bulk metallic glass (BMG) have been studied under high pressure and high temperature (HP & HT) by X-ray diffraction measurements with synchrotron radiation source. We found that the BMG underwent a phase transitions of amorphous-crystalline-amorphous at 10 GPa upon heating. The parallel experiments were carried out at 7 GPa, while we did not observe the amorphous-crystalline-amorphous transitions by increasing temperature. Quenching the melted BMG at 7 GPa, it was found that the phase crystallized from the melt differed from the primary phase crystallized from the starting amorphous solid upon heating, suggesting there existed a distinct mechanism in two cases.

关键词： phase transition, Pd40Ni10Cu30P20, high pressure and high temperature.

Landscape gradient of autumn photosynthetic decline in Abies sachalinensis seedlings

在线全文

学校读者我要写书评

暂无评论

Journal of Forestry Research 2023年第1期34卷 187-195页

作者： Tetsuto Sugai wataru Ishizuka Toshihiro Watanabe Hokkaido Research Center Forestry and Forest Products Research InstituteHitsujigaoka 7Sapporo 062-8516Japan Plant Nutrition Laboratory Research Faculty of AgricultureHokkaido UniversitySapporo 060-8689Japan Forest Research Institute Hokkaido Research OrganizationBibaiHokkaido 079-0198Japan

Understanding what environmental factors are genetically linked to a phenologic al event is critical for predicting responses to climate *** synthetic phenology often varies among a species of evergreen conifers due to local ***,few empirical studies have revealed relevant relationships between climatic factors in provenance environments and photosynthetic *** study evaluated the effects of environmental conditions of the growing site and seed source provenance on the seasonal changes in maximal photochemical quantum yield of photo systemⅡ(Fv/Fm)in a common garden experiment with 2-year-old seedlings of Sakhalin fir(Abies sachalinensis),a representative species with local adaptation,from four seed source provenances.A logistic model was constructed to explain the seasonal variation of Fv/Fmfrom July to October and the relationships between the estimated model parameters and representative factors featuring provenance environments were *** landscape gradient of the detected model parameters responsible for the provenance environments was visualized in a map of the distribution *** lowest temperature was the most plausible factor in the growing environment to explain the seasonal changes of Fv/*** the representative meteorological factors of provenance environments,the lowest temperatures in July showed significant relationships with two model parameters,explaining the lower limit of Fv/Fmand the higher sensitivity of autumn Fv/*** estimated spatial maps of model parameters consistently showed that the higher the lowest temperature in July in the provenance environment,the lower the Fv/Fmin October and the greater the decrease in the autumn Fv/***,the lowest summer temperature could be associated with the local adaptation of autumn photosynthetic phenology in ***.

关键词： Phenology Local adaptation Genetic cline Lowest temperature

Continual few-shot patch-based learning for anime-style colorization

在线全文

学校读者我要写书评

暂无评论

Computational Visual Media 2024年第4期10卷 705-723页

作者： Akinobu maejima Seitaro Shinagawa Hiroyuki Kubo Takuya Funatomi Tatsuo Yotsukura Satoshi Nakamura Yasuhiro Mukaigawa The Research and Development Division OLM DigitalInc.Advanced Research GroupIMAGICA GROUPTokyo 1540023Japan Division of Information Science Graduate School of Science and TechnologyNara Institute of Science and TechnologyNara 6300192Japan Graduate School of Informatics Chiba UniversityChiba 2638522Japan

The automatic colorization of anime line drawings is a challenging problem in production *** advances in deep neural networks have addressed this problem;however,collectingmany images of colorization targets in novel anime work before the colorization process starts leads to chicken-and-egg problems and has become an obstacle to using them in production *** overcome this obstacle,we propose a new patch-based learning method for few-shot anime-style *** learning method adopts an efficient patch sampling technique with position embedding according to the characteristics of anime line *** also present a continuous learning strategy that continuously updates our colorization model using new samples colorized by human *** advantage of our method is that it can learn our colorization model from scratch or pre-trained weights using only a few pre-and post-colorized line drawings that are created by artists in their usual colorization ***,our method can be easily incorporated within existing production *** quantitatively demonstrate that our colorizationmethod outperforms state-of-the-art methods.

关键词： anime colorization few-shot learning continuous learning strategy

Full polarimetric PALSAR-based land cover monitoring in Cambodia for implementation of REDD policies

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

International Journal of Digital Earth 2013年第3期6卷 255-275页

作者： Ram Avtar wataru Takeuchi Haruo Sawada Institute of Industrial Science The University of TokyoTokyoJapan

Forest cover monitoring plays an important role in the implementation of climate change mitigation policies such as Kyoto protocol and Reducing Emissions from Deforestation and Forest Degradation(REDD).In this study,we have monitored land cover using the PALSAR(Phased Array type L-band Synthetic Aperture Radar)full polarimetric data based on incoherent target *** classification technique has been applied on CloudePottier decomposition,FreemanDurden three component,and Yamaguchi four component decomposition for accurate mapping of different types of land cover *** on confusion matrix derived from the predicted and defined pixels,the evergreen and sparsely deciduous forests have shown high producer’s accuracy by FreemanDurden three component and Yamaguchi four component classifica*** overall accuracy of Maximum Likelihood Classification by Yamaguchi four component is 94.1%with 0.93 kappa coefficient as compared to the 90.3%with 0.88 kappa coefficient by FreemanDurden three component and 89.7%with 0.88 kappa coefficient by CloudePottier *** accuracy of classification in a forested area using full polarimetric PALSAR data may have been because of high penetration of L-band *** content of this study could be useful for the forest cover mapping during cloudy days needed for proper implementation of REDD policies in Cambodia.

关键词： global climate change REDD PALSAR forest cover mapping

Essentials of Proteolytic Machineries in Chloroplasts

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Molecular Plant 2017年第1期10卷 4-19页

作者： Kenji Nishimura Yusuke Kato wataru Sakamoto Institute of Plant Science and Resources Okayama University 2-20-1 Chuo Kurashiki Okayama 710-0046 Japan

Plastids are unique organelles that can alter their structure and function in response to environmental and developmental stimuli. Chloroplasts are one type of plastid and are the sites for various metabolic pro- cesses, including photosynthesis. For optimal photosynthetic activity, the chloroplast proteome must be properly shaped and maintained through regulated proteolysis and protein quality control mechanisms. Enzymatic functions and activities are conferred by protein maturation processes involving consecutive proteolytic reactions. Protein abundances are optimized by the balanced protein synthesis and degrada- tion, which is depending on the metabolic status. Malfunctioning proteins are promptly degraded. Twenty chloroplast proteolytic machineries have been characterized to date. Specifically, processing peptidases and energy-driven processive proteases are the major players in chloroplast proteome biogenesis, remod- eling, and maintenance. Recently identified putative proteases are potential regulators of photosynthetic functions. Here we provide an updated, comprehensive overview of chloroplast protein degradation ma- chineries and discuss their importance for photosynthesis. Wherever possible, we also provide structural insights into chloroplast proteases that implement regulated proteolysis of substrate proteins/peptides.

关键词： chloroplast biogenesis protease protein homeostasis

Porphyromonas gingivalis,a periodontal pathogen,impairs post-infarcted myocardium by inhibiting autophagosome–lysosome fusion

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

International Journal of Oral Science 2023年第4期15卷 626-639页

作者： Yuka Shiheido-Watanabe Yasuhiro maejima Shun Nakagama Qintao Fan Natsuko Tamura Tetsuo Sasano Department of Cardiovascular Medicine Graduate School of Medical and Dental SciencesTokyo Medical and Dental UniversityTokyoJapan

While several previous studies have indicated the link between periodontal disease (PD) and myocardial infarction (MI), theunderlying mechanisms remain unclear. Autophagy, a cellular quality control process that is activated in several diseases, includingheart failure, can be suppressed by Porphyromonas gingivalis (P.g.). However, it is uncertain whether autophagy impairment byperiodontal pathogens stimulates the development of cardiac dysfunction after MI. Thus, this study aimed to investigate therelationship between PD and the development of MI while focusing on the role of autophagy. Neonatal rat cardiomyocytes(NRCMs) and MI model mice were inoculated with wild-type P.g. or gingipain-deficient P.g. to assess the effect of autophagyinhibition by P.g. Wild-type P.g.-inoculated NRCMs had lower cell viability than those inoculated with gingipain-deficient P.g. Thisstudy also revealed that gingipains can cleave vesicle-associated membrane protein 8 (VAMP8), a protein involved in lysosomalsensitive factor attachment protein receptors (SNAREs), at the 47th lysine residue, thereby inhibiting autophagy. Wild-type P.g.-inoculated MI model mice were more susceptible to cardiac rupture, with lower survival rates and autophagy activity thangingipain-deficient P.g.-inoculated MI model mice. After inoculating genetically modified MI model mice (VAMP8-K47A) with wildtype P.g., they exhibited significantly increased autophagy activation compared with the MI model mice inoculated with wild-typeP.g., which suppressed cardiac rupture and enhanced overall survival rates. These findings suggest that gingipains, which arevirulence factors of P.g., impair the infarcted myocardium by cleaving VAMP8 and disrupting autophagy. This study confirms thestrong association between PD and MI and provides new insights into the potential role of autophagy in this relationship.

关键词： inhibiting myocardium periodontal

Simultaneous Oxidization of NO_x and SO_2 by a New Non-thermal Plasma Reactor Enhanced by Catalyst and Additive

在线全文

学校读者我要写书评

暂无评论

Plasma Science and Technology 2008年第1期10卷 53-56页

作者： Heejoon KIM 韩军 Yuhei SAKAGUCHI wataru MINAMI Department of Ecological Engineering Toyohashi University of Technology Hnbei Province Key Laboratory of Coal Conversion and New Carbon Materials Wuhan University of Science and Technology

The non-thermal plasma as one of the most promising technologies for removing NOx and SO2 has attrm^ted much attention. In this study, a new plasma reactor combined with catalyst and additive was developed to effectively oxidize and remove NOx and SO2 in the flue gas. The experimental results showed that TiO2 could improve the oxidation efficiency of SO2 in the case of applying plasma while having a negative effect on the oxidation process of NO and NOx. With the addition of NH3, the oxidation rates of NOx, NO and SO2 were slightly increased. However, the effect of adding NH3 on NOx oxidation was negative when the temperature was above 200℃.

关键词： additive catalyst NOx SO2 oxidation rate plasma