17062 research outputs found
Sort by
GaN single crystal growth on ScAlMgO4 substrate by HVPE method and GaN substrate fabrication
Get PDF三重大学博士(学術)application/pdf内容の要旨・審査結果の要旨 / 地域イノベーション学専攻thesi
Russian maps and the northwestern border of the Qing Dynasty in the late 19th century
Get PDF清とロシアの間で清とロシアの間では、1880～90年代に中国西北の国境が画定されていく。当時の清朝は、交渉において十分な地理情報を持たず、ロシア製地図に頼らざるを得ない状況にあった。これを打開するべく、清の在外公館では西洋製地図が収集される。この頃、西洋諸国は中央アジアにて測量・調査を進め、さかんに地図を作製していた。しかし、それらと清の国境画定との関係については十分に明らかにされていない。そこで本稿では、中国西北国境が描かれた1880～90年代のロシア製地図にはどのようなものがあり、それは如何なる内容を持っていたのかを検討した。そして、描かれた国境と清朝による地理情報の収集について考察した。検討の結果、地図の各種データから、ロシアが断続的に現地の地理情報を集め、それに伴い国境線の位置が変化する様子が浮かび上がってきた。また、当該地域の国境画定において直接の当事者ではないアメリカが、駐露公使館を通じてロシア製地図を入手し、本国の軍事機関で利用していたことが分かった。このような動きは清の公使館にも見られ、当時の在外公館にとっての地図の重要性が窺われる。この時期、清の駐露公使館ではパミール国境の画定交渉を控え、収集した西洋製地図をもとに翻訳図が作製されていた。それは清と西洋諸国、とりわけロシアの持つ地理情報との差を縮める効果を期待してのものだったと考えられる。しかし清側は、最新の情報を入手しきれないまま、1890年代半ばのパミール国境画定交渉の最終段階を迎えていた。departmental bulletin pape
miR-200c-3p regulates a4 integrin-mediated T cell adhesion and migration
Get PDF三重大学博士(医学)application/pdf内容の要旨・審査結果の要旨 / 三重大学大学院医学系研究科 生命医科学専攻 基礎医学系講座 分子病態学分野thesi
Typing Skill Acquisition in Children With Developmental Disorders, With or Without Developmental Dyslexia
Get PDF三重大学博士(医学)application/pdf内容の要旨・審査結果の要旨 / 三重大学大学院医学系研究科 生命医科学専攻 臨床医学系講座 小児科学分野thesi
Outcomes of Endovascular Treatment for Infectious Thoracic Aortic Diseases
Get PDF三重大学博士(医学)application/pdf内容の要旨・審査結果の要旨 / 三重大学大学院医学系研究科 生命医科学専攻 臨床医学系講座 放射線医学分野thesi
Study on multiple utilization of agricultural and forestry waste biomass
Get PDF三重大学博士(学術)application/pdf内容の要旨・審査結果の要旨/共生環境学thesi
Studies on the Methane-Mitigating Potential of Rice Bran, Organic Acids and their Combination
Get PDF三重大学博士(学術)application/pdfMethane, produced as a byproduct of microbial fermentation in the digestive systems of ruminant animals, contributes notably to global greenhouse gas emissions and represents a loss of dietary energy. Thus, methane production in the rumen is problematic in terms of both production efficiency and environmental effects. This study aimed to evaluate the impact of rice bran and organic acids on fermentation characteristics and methane (CH4) production in a series of in vitro experiments.
The first study assessed lactic acid bacteria (LAB) isolated from horse feces as an inoculant for solid-state fermentation (SSF) of rice bran and its effect on nutrient composition and organic acid production. SSF improved the crude protein, ether extract, ash, crude fiber, neutral detergent fiber, and acid detergent fiber compared to unfermented rice bran (P< 0.05). The lactate and total organic acid produced were increased by the addition of LAB (P< 0.01), and the highest concentrations were recorded in fermented rice bran (FRB) containing Ligilactobacillus equi (T2 and T3). The study found that combining LAB from horse feces with SSF improves the quality of RB as an animal feed ingredient by increasing protein, carbohydrate, mineral, and organic acid levels.
The second study assessed the effect of FRB on rumen fermentation using an in vitro system. The results revealed that both RB and FRB (with or without L. equi) significantly reduced gas, methane (CH4), CH4 per dry matter digested (CH4/DDM), anaerobic fungi, and Fibrobacter succinogenes populations (P< 0.001). Total short-chained fatty acids (SCFA) were also reduced in RB and FRB without L. equi compared to control (P< 0.001). Propionate proportion was increased while butyrate proportion was reduced in response to treatment addition in cultures (P< 0.001). Overall, RB and FRB supplementation can be used to decrease CH4 production in vitro.
The third study was done to elucidate which component of rice bran is involved in the inhibition of CH4. The addition of ethanol-soluble fraction (ESF) significantly decreased CH4, CH4/DDM, and methanogen population (P< 0.05), although gas and dry matter digestibility (DMD) remained comparable to the control group. The addition of ethanol and ESF reduced total short-chain fatty acids (SCFA) and propionate while increasing butyrate (P< 0.05). Supplementing 10% ESF can significantly reduce CH4generation by directly inhibiting the methanogen population without affecting substrate digestibility.
The last study was focused on the combination of acrylate (AA) and pyruvate (PA) with rice bran and its effect on methane. The addition of acrylate reduced gas, CH4, and CH4/DDM (P<0.01). Conversely, acrylate and pyruvate addition increased the total organic acid and lactate production while decreasing acetate and propionate produced compared to the control (P<0.01). Populations of anaerobic fungi and M. elsdenii were reduced in AA and PA, while methanogen, Selenomonas ruminantium, and Prevotella ruminicola were only reduced in AA (P<0.01). These results showed that the addition of organic acids can be used to reduce CH4 by increasing lactate production.
Based on the results of these studies, rice bran could be used directly in the diet or its extract to reduce CH4 production in vitro. Moreover, supplementation of organic acid with rice bran can also yield a substantial reduction in CH4, however further study should be conducted to maximize their efficacy.本文/Graduate School of Bioresources Mie University120pdoctoral thesi