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1.

論文(リポジトリ)

論文(リポジトリ)
Sakamoto, Nobuo ; Kano, Naoki ; Imaizumi, Hiroshi
出版情報: Applied Geochemistry.  23  pp.2955-2960,  2006-10.  Elsevier
本文リンク: http://hdl.handle.net/10191/21925
概要: The determination of rare earth elements (REEs), thorium (Th), and uranium (U) in seaweeds of various species and in amb ient surface seawater were performed by inductively coupled plasma mass spectrometry (ICP-MS). The seaweeds and the seawater samples were collected at 10 different coastal areas of Niigata Prefecture in Japan twice a year (spring and autumn) in 2004 and 2005.\nResults showed that, concentration of REEs in seaweed species from Niigata Prefecture were about 102-103 times higher than those in seawater;and the enrichment factors of REEs was larger in heavy REE than light REE. A significant concentrations difference of REEs, Th, U was found among species even in the same phylum. The concentration of U in Undaria pinnatifida was the highest. Considering the experimental result that Undaria pinnatifida has low concentration of REEs among typical brown algae, different REEs and U uptake mechanisms were suggested. The concentration of REEs, Th and U did not vary remarkably among sampling points and/or seasons. 続きを見る
2.

論文(リポジトリ)

論文(リポジトリ)
加藤, 健二 ; 岡崎, 篤行
出版情報: 日本建築学会北陸支部研究報告集 — 日本建築学会北陸支部研究報告集.  49  pp.449-452,  2006-07.  日本建築学会
本文リンク: http://hdl.handle.net/10191/17925
概要: The survey and the research of Town house have lagged behind compared with th e Farmer s house. Therefore, this paper aims principally at Town house. The purpose of this paper is to prove remaining situation and architectural characteristic of historic buildings in Nakakanbara and Higashikanbara District. As a result, the percentage of historic building is 20% in this area. The form of Town house and Farmers house are classified into ten forms. The road becomes an axis and The direction of Town house is Tateya against the road. There is no Mizukiriita.Eburiita and Segaidukuri are wide ly distributed. 続きを見る
3.

論文(リポジトリ)

論文(リポジトリ)
加々島, 慎一 ; 志村, 俊昭
出版情報: 地質学雑誌 — 地質学雑誌.  107  pp.515-530,  2001-08.  日本地質学会
本文リンク: http://hdl.handle.net/10191/17810
概要: The Late Cretaceous to Paleogene Iwafune granitoids of are distributed around the border between Niigata and Yamagata Pr efectures, Japan. The Budo Mountains is located in northern part of Niigata Prefecture and is exposed in an area covering more than 250 square kilometers. It consists of Iwafune granitoids, which are divided into six lithological types ; porphyritic biotite granite (PBG), biotite granite (BG), garnet two-mica granite (GTMG), two-mica granite (TMG), quartz diorite (QD) and granodiorite (GD). The six rock types can be assigned to three rock groups on the basis of petrological observations as follows : biotite granite group(BG-group ; PBG and BG), and tow-mica granite group (TMG-group;GTMG and TMG) and diorite group (D-group;QD and GD). Most of the granitoids in this area are attributed to BG-group. This group is composed of quartz, plagioclase, potassium feldspar, biotite and minor amounts of accessory minerals. Especially, the PBG contains potassium feldspar megacrysts and sometimes shows schlieren layering owing to the concentration of biotite and plagioclase. BG-group has medium SiO_2 content ranging from 69 to 77 weight percent and is peraluminous. Modal and bulk chemical compositions show that BG-group has curved trend. Mass balance calculation indicates that the BG-series magma can be derived from common parental magma through two-stage fractional crystallization of potassium feldspar, biotite and plagioclase. The first stage is characterized by plagioclase- and biotite-rich fractionation, and the second stage is characterized by fractionation of biotite and potassium feldspar more than plagioclase.<br />新潟県北部の蒲萄山塊には,後期白亜紀から古第三紀の岩船花崗岩類が分布する.蒲萄山塊南部の岩船花崗岩類は,斑状黒雲母花崗岩,黒雲母花崗岩,ざくろ石両雲母花崗岩,両雲母花崗岩,石英閃緑岩,花崗閃緑岩に区分された.これらは産状,構成鉱物,全岩-鉱物組成から3つの岩類に分けられる.主要岩相である斑状黒雲母花崗岩の結晶作用を検討した.モード組成および全岩化学組成から屈曲したトレンドが得られ,2段階の分別結晶作用が考えられる.マスバランス計算により,第1段階では斜長石と黒雲母が主な分別鉱物であり,第2段階では斜長石よりもカリ長石+黒雲母の分別が多かったことが導き出された. 続きを見る
4.

論文(リポジトリ)

論文(リポジトリ)
栗村, 美帆 ; 吉田, 智佳子
出版情報: 新潟大学農学部研究報告 — 新潟大学農学部研究報告.  70  pp.29-40,  2018-02.  新潟大学農学部
本文リンク: http://hdl.handle.net/10191/49933
概要: 効率的な生乳生産のため、乳牛は遺伝的改良とともに、高栄養な飼料が多給されている。日本では、飼料の輸入依存度が高くなって久しい。一方、農業生産者の減少や耕作放棄地の拡大は歯止めがかからず、地域では鳥獣害や土砂災害などが増加している。食料生産基 盤の安定化のために、耕畜連携の農業生産体系の再構築が望まれる。新潟県は日本最大の稲作地帯であり、稲作と並行して酪農を営む独特の体系が発達してきたが、稲作と酪農の相互の活用は薄く、粗飼料自給率は全国的に見ても低い。本研究では、平成21年(2009年)に新潟県魚沼地域で発足した、酪農家による粗飼料生産組合を事例として、地域の飼料自給率向上の可能性について、組織の概要、自給飼料の品質および自給飼料利用による乳牛の生産性および繁殖成績への影響を評価した。自給飼料利用前(2009年)と利用後(2011年)の状況を調査し、平成24年(2012年)に組合員を対象に、乳牛の繁殖成績のモニタリングを行った。自給飼料生産組合は個々の酪農経営とは独立して運営され、地元JA や関連機関と連携し、地元稲作農家と飼料利用目的の水稲栽培を契約し、飼料生産を行っていた。稲WCS およびコーンサイレージとも品質は良好で一般的な輸入飼料より安価で販売され、飼料コストが軽減していた。自給飼料利用による乳牛の生産性および繁殖成績への負の影響は見られなかった。組合組織による自給飼料生産は、酪農の収益性が高まるとともに、地域内の耕畜連携が推進され、地域の持続的な農業生産基盤の盤石化につながると考えられた。<br />Animal husbandry in Japan utilizes several techniques to efficiently produce dairy milk, including genetic modification of cows and the use of highly nutritious concentrate and forage. However, commercial feed is commonly used and there is a heavy dependence on imports. Niigata Prefecture, which has the country’s highest rice production, has a distinctive, improved agricultural practice where farmers pair rice production in paddy fields with milk production in barns. However, the field space for producing forage is relatively limited. To improve sustainability, it is necessary to design an organic and functional agricultural system for this rural area. Against this background, this study evaluated the economic impacts of selfproduction of forage by dairy farmers and the effects of self-forage on the productivity of dairy cows. The Forage Producer’s Association in Uonuma, Niigata Prefecture, was also examined. The aims of self-forage, a general overview of management practices, the quality of forage, and its cost performance were examined by a questionnaire distributed among members of the association and other involved persons in 2012. The effects of self-produced forage on the productivity and reproductive performance of dairy herds were evaluated by comparison with records for 2009. Five dairy farmers from the association participated, and administration of the association was independent of each farm. The association enters into contracts with local rice farms to produce paddy whole-crop silage, as well as corn silage in re-cultivated fields. The self-produced forage was of good quality and was provided to members at relatively low cost, resulting in lower feed costs. The cows maintained milk productivity when fed self-produced forage, and had good reproductive performance. Thus, we conclude that establishment of a local Forage Producer’s Association resulted in production of forage of sufficiently high quality and positively affected the feed costs, milk productivity, and reproductive performance of the dairy farms. 続きを見る
5.

論文(リポジトリ)

論文(リポジトリ)
古澤, 慎一 ; 木南, 莉莉
出版情報: 新潟大学農学部研究報告 — 新潟大学農学部研究報告.  63  pp.41-53,  2011-03.  新潟大学農学部
本文リンク: http://hdl.handle.net/10191/18607
概要: 本研究の目的は、新潟県における環境保全型農法の導入による経済的な収益性と環境保全の効果、および農法普及の空間的な波及効果を明らかにすることである。分析の結果として、環境保全型農法による経営改善の効果がマーケティング努力や学習経験によるだけで なく、取組みの主体性(取組みの動機)や経営組織の形態にも影響されることが明らかになった。また、農法普及の空間的な波及効果が集落営農組織などの地域一体型の農業経営組織において大きくなる傾向が確認された。<br />The purpose of the present study is to clarify an economical profitability and an environmental preservation effect andthe spatial effect of technology diffusion by the introduction of the environment-friendly farming in Niigata Prefecture.As a result of the analysis, it is clarified that the effect of the improved management of the environment-friendly farmingdepends not only on the marketing effort and the learning experience but also on the subjectivity of the approach (motives ofpractices) and the forms of the management organization. Moreover, the tendency that a spatial effect of technology diffusionexpands in a regional farming system such as the community farming organizations was confirmed. 続きを見る
6.

論文(リポジトリ)

論文(リポジトリ)
Kano, Naoki ; Kikuchi, Takehiro ; Sakamoto, Nobuo ; Imaizumi, Hiroshi ; Murayama, Hitoshi ; Yagoh, Hiroaki ; Ohizumi, Tsuyoshi
出版情報: Radioisotopes.  55  pp.307-317,  2006-06.  日本アイソトープ協会
本文リンク: http://hdl.handle.net/10191/6819
概要: In order to investigate the characteristics (or the sources) of precipitations in Niigata Prefecture, oxygen stable isot opic ratios (i.e., δ^<18>O) and the concentrations of rare earth elements (REEs), thorium (Th), and uranium(U) in the precipitation samples were measured. The precipitation samples were collected using a filtrating bulk sampler every two weeks at 3 points in Niigata Prefecture during the period from December 2003 to December 2004. Consequently, the following matters have been mainly clarified. (1) In rainy season, δ^<18>O value of precipitations was the smallest. (2) In regard to δ^<18>O value, "Continental effect" and "Amount effect" was generally observed in this work. On the other hand, "Temperature effect" was remarkably found only in winter. (3) The concentrations of trace metallic elements (REEs, Th, U) increased in spring. (4) REEs in precipitations might have been derived from a crustal source as well as oceanic source, while anthropogenic source was not negligible.<br />新潟県における降水の特徴(あるいは起源)を探求するため,降水試料中の酸素安定同位体比及び微量金属元素(希土類元素,Th,U)濃度を測定した。降水試料は県内3地点において,ろ過式バルクサンプラを用いて,2003年12月から2004年12月の1年間,2週間ごとに採取した。その結果,主として以下のことが明らかになった。(1)梅雨期において,降水中のδ^<18>O値は最も低くなった。(2)δ^<18>O値に関して,本研究において"内陸効果"と"雨量効果"が概して見られた。他方,"温度効果"は冬季においてのみ顕著に見られた。(3)降水中の微量金属元素の濃度は春季に増加した。(4)降水中の希土類元素には,人為起源も無視できないものの,海洋起源の他,地殻起源によるところが大きいと考えられる。 続きを見る
7.

論文(リポジトリ)

論文(リポジトリ)
狩野, 直樹 ; 佐藤, 明史 ; 今泉, 洋
出版情報: Radioisotopes — Radioisotopes.  53  pp.415-425,  2004-07.  日本アイソトープ協会
本文リンク: http://hdl.handle.net/10191/6818
概要: 新潟県における近年の環境水の同位体的・化学的特徴についての知見を得ること,更には環境水動態の新たな評価方法を確立するため,新潟県のいくつかの河川水や地下水について,酸素安定同位体比(δ^<18>O)及び主要イオン濃度,pH,電気伝導度の測定 を行った。その結果,以下のことが明らかになった。(1)河川水中のδ^<18>O値は,概ね-11‰~-10‰の値を示す,(2)地下水のδ^<18>O値は,河川水より平均1.5‰程度高く,また年間の変動幅も±1.0‰程度と小さい,(3)河川水上流部近傍の地下水よりも河川水下流部近傍の地下水の方が,年間を通して高いδ^<18>O値及び電気伝導度を示す,(4)大部分の主要イオンにおいて,夏期と冬期に,その濃度が高くなり,春期に濃度が低くなる傾向を示す,(5)周辺地下水の主要イオン濃度の方が河川水の主要イオン濃度より全体的に高い値を示す,(6)河川水において,上流から下流に向かうにつれ,主要イオン濃度は高くなる傾向を示す,(7)河川水におけるδ^<18>Oと電気伝導度との相関関係は,上流部ほど(下流部に比べて)良い(上流部ほど両者の相関係数が高い)。<br />To reveal the characteristics of environmental water in Niigata Prefecture in recent years, and to establish a new evaluation method for the behavior of the environmental water, oxygen stable isotopic ratios (i.e., δ^<18>O), concentrations of major ions, pH and EC (electric conductivity) in water samples from several rivers and those from groundwater in Niigata Prefecture were measured. Isotopic measurements were performed with a stable isotope ratio mass spectrometer (Mieromass PRISM). Consequently, the following matters have been found. (1) The δ^<18>O values of river waters in Niigata Prefecture are generally -11‰ to -10‰. (2) The δ^<18>O values of groundwater in Niigata Prefecture are generally 1.5‰ higher than that of river waters and the variation is about ±1‰ throughout the year. (3) The δ^<18>O values and the conductivity of groundwater located in the downstream area are higher than those in the upstream throughout the year. (4) The concentrations of major ions of river waters were almost higher in summer and winter than those in spring. (5) The concentrations of major ions in groundwater were higher than those in river water. (6) The concentrations of major ions in river water tend to increase with the downstream from the upstream. (7) The relationship between the conductivity and δ^<18>O values in river water was relatively close (i.e. The correlation coefficient between them is large) in the upstream area (by comparing with that in the downstream). (Received February 16, 2004) 続きを見る
8.

論文(リポジトリ)

論文(リポジトリ)
狩野, 直樹 ; 青柳, 良隆 ; 松井, 健太郎 ; 今泉, 洋
出版情報: 環境化学 — 環境化学.  13  pp.789-798,  2003-09.  日本環境化学会
本文リンク: http://hdl.handle.net/10191/21906
概要: In order to investigate the recent state of marine environment in Niigata Prefecture, to investigate the biological concentration in the ocean, and to investigate the behavior of rare earth elements (REEs) in the ocean, REEs in many kinds of seaweed samples as well as seawater samples in Niigata Prefecture were determined by inductively coupled plasma mass spectrometry (ICP-Ms). Seaweed and seawater samples were collected at 10 points on the coast in Niigata Prefecture (i. e. , Sanpoku Town, Niigata City Iwamuro Village, Izumozaki Town, Kashiwazaki City Nou Town, Ryotu City Aikawa Town, Sawata Town and Akadomari Village) from 2000 to 2002. The following points have been clarified by the present study. (1) .The concentrations of REEs in the seaweed gathered on the coast in Niigata Prefecture were about 10^3 to 10^5 times higher than those in the seawater; and the enrichment factors of REEs is generally larger in HERB than LREE. (2) A large difference was found between REE pattern of the seaweed samples taken on the coast in Niigata Mainland and that on the coast in Sado Island. (3) The degrees of "positive Ce-anomaly in seaweed samples" and "negative Ce-anomaly in seawater samples" in Niigata Mainland were also larger than those in Sado Island. (4) Positive Gd-anomaly (which seems to be an artificial origin) was found in REE patterns of some seawater samples, (5) REE pattern of seaweed and seawater samples may be an useful tracer of investigating the surrounding marine environment. 続きを見る
9.

論文(リポジトリ)

論文(リポジトリ)
狩野, 直樹 ; 青柳, 良隆 ; 今泉, 洋
出版情報: 環境化学 — 環境化学.  11  pp.221-231,  2001-06.  日本環境化学会
本文リンク: http://hdl.handle.net/10191/21907
概要: In order to investigate the present state of marine environment in Niigata Prefecture, and to investigate the behavior of rare earth elements (REEs) in the ocean, REEs in many kinds of seaweed samples taken on the coast in Niigata Prefecture were determined by inductively coupled plasma mass spectrometry (ICP-Ms). Seaweed samples were taken at 10 spots on the coast in Niigata Prefecture including Sado\nIsland on August, 2000. After decomposing the samples, REEs were separated by solvent extraction method. The following results are obtained. (1) Even in the same phylum (e.g., green algae, brown algae, or red algae), concentrations of REEs vary widely depending on the species of seaweed. (2) A large difference was found between REE patterns of the seaweed samples taken on the coast in Niigata Mainland and those on the coast in Sado Island. It shows that the surrounding marine environment seems to be an important factor for determining REE pattern as well as the species of seaweed. (3) As to REE pattern of some seaweed samples taken on the coast in Niigata Prefecture, Yb-anomaly was found as well as Ce-, and EU-anomaly. (4) REE pattern of seaweed samples may be an useful tracer of investigating the surrounding marine environments. 続きを見る
10.

論文(リポジトリ)

論文(リポジトリ)
木南, 莉莉 ; 古澤, 慎一 ; 木南, 章
出版情報: 地域学研究 — 地域学研究.  41  pp.1055-1074,  2012-03.  日本地域学会
本文リンク: http://hdl.handle.net/10191/25228
概要: The present paper aims to analyze the network structure of food sub-cluster through a case study of health-related indus try clustering in Niigata prefecture, Japan. First, an outline of the policy and market trends of health-related industries in Japan is summarized, and a survey of existing research on business alliance and network formation is presented. Next, the transaction network among member enterprises of the cluster conference initiated by private companies aiming to develop health-related industries is analyzed. The following analytical results were obtained. First, we clarified that this cluster still existed at the early stages of the cluster formation through analysis of the transactional relationship among the conference member enterprises. Therefore, the effect of knowledge creation and spillover closely related to the generation of innovations after a certain period must be verified in the future Moreover, as a result of the analysis on the structure of the transaction network among the food manufacturing companies, the main industry of the cluster, the existence of the network of a small-world type is considered to induce efficient distribution of knowledge and information, and productive activities are unable to be confirmed. However, we clarified that the core enterprises that were considered to form a food sub-cluster within the health-related industrial cluster take the strategy of global-local activity, i.e. selling their products to the domestic markets in metropolitan areas while remaining located in their local place in Niigata Prefecture, and developing an overseas market as a result of the classification of the network community. In other words, a new health-related industry is being created by catching the public needs for health, and attractiveness of the food industry is being simultaneously increased through competition and cooperation among the core enterprises. Finally, in the future, it is necessary to verify the most effective ways for business alliance and structure for networks that correspond to the developmental of the industrial cluster through interview surveys and quantitative analyses based on the original surveys to determine the ideal way for regional development under globalization. 続きを見る