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赤子心性的诗意见证——读马成富先生《雪域魂》有感
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作者 二根米 《草地》 2007年第3期78-79,共2页
  "30年来,笔者足迹踏遍了雪山草地……遗憾的是,那些宝贵的民族文化遗产中,已有三分之一消失了.残酷的现实令笔者有一种负罪感."……
关键词 马成 诗意 羌笛
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地下储气库调峰产量与采气井数设计技术 被引量:6
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作者 马小明 张秀丽 +3 位作者 张雪芳 石恩荣 成亚斌 马东博 《天然气工业》 CSCD 北大核心 2013年第10期89-94,共6页
地下储气库的调峰产量和采气井数是其设计的关键指标,目前国内主要以估算的方式来确定这两个参数,未见理论与实际成熟配套的技术方法,由此带来了地下储气库实际运行工作气量无法达标、采气调峰能力不足等后果,直接影响到了地下储气库的... 地下储气库的调峰产量和采气井数是其设计的关键指标,目前国内主要以估算的方式来确定这两个参数,未见理论与实际成熟配套的技术方法,由此带来了地下储气库实际运行工作气量无法达标、采气调峰能力不足等后果,直接影响到了地下储气库的运行效果。为此,根据已建成的中国石油大港油田地下储气库群多年实际运行效果,在研究地下储气库实际调峰运行规律的基础上,以地下储气库不同调峰强度为模式,应用微积分数学描述方法,创建了以计算地下储气库日调峰气量、高峰期和低谷期采气井数为核心的马成MC公式,描述了地下储气库工作气量、调峰气量、单井产量、采气井数之间的数学关系,解决了在工作气量控制下调峰日产气量与采气井数的设计技术问题,对地下储气库的调峰产量预测和生产井数设计具有指导意义。 展开更多
关键词 地下储气库 工作气量 调峰产量 调峰曲线 采气井数 马成公式 生产井数
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Design and Fabrication of Thermo-Optic 4×4 Switching Matrix in Silicon-on-Insulator 被引量:5
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作者 王章涛 樊中朝 +2 位作者 夏金松 陈少武 余金中 《Journal of Semiconductors》 EI CAS CSCD 北大核心 2004年第12期1573-1575,共3页
A rearrangeable nonblocking thermo-optic 4×4 switching matrix,which consists of five 2×2 multimode interference-based Mach-Zehnder interferometer(MMI-MZI) switch elements,is designed and fabricated.The minim... A rearrangeable nonblocking thermo-optic 4×4 switching matrix,which consists of five 2×2 multimode interference-based Mach-Zehnder interferometer(MMI-MZI) switch elements,is designed and fabricated.The minimum and maximum excess loss for the matrix are 6.6 and 10.4dB,respectively.The crosstalk in the matrix is measured to be between -12 and -19.8dB.The switching speed of the matrix is less than 30μs.The power consumption for the single switch element is about 330mW. 展开更多
关键词 integrated optics SILICON-ON-INSULATOR matrix switches PLC technology
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试探《穆天子传》传入日本的时间及途径 被引量:1
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作者 刘伏玲 王齐洲 《华中师范大学学报(人文社会科学版)》 CSSCI 北大核心 2015年第4期98-104,共7页
伊与部马养在《从驾应诏》诗中提到"瑶池"和"白云篇",而"瑶池"与"白云谣"典故出自《穆天子传》,明示他受到《穆天子传》影响。伊与部马养是有文献可证的《穆天子传》在日本的早期接受者,其接... 伊与部马养在《从驾应诏》诗中提到"瑶池"和"白云篇",而"瑶池"与"白云谣"典故出自《穆天子传》,明示他受到《穆天子传》影响。伊与部马养是有文献可证的《穆天子传》在日本的早期接受者,其接受时间在持统天皇702年逝世之前。731年葛井连广成奉试对策提到了"黄竹"和"白云","黄竹"典故也出自《穆天子传》,说明日本上层对《穆天子传》已很熟悉。日本学者在诗文中引用《穆天子传》,既与他们注意学习《昭明文选》和李善注有关,也与他们直接阅读《穆天子传》有关。《文选》李善注本可能不是直接从唐朝传入日本,而是通过新罗间接传入。《穆天子传》则更有可能是由日本遣隋使团、遣唐使团中的学问僧与留学生带回日本。基于此,笔者将《穆天子传》传至日本的时间上限定为隋文帝开皇二十年(600年),日本圣德太子初次派遣留学生到中国留学;下限则为日本持统天皇逝世之年,即武则天长安二年(702年)。具体时间难以确考。 展开更多
关键词 《穆天子传》 伊与部马养 《从驾应诏》 葛井连广成 白云谣 黄竹诗
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Potato Y Potyvirus Helper Component Proteinase Enhances Long-distance Movement of Potato X Potexvirus 被引量:1
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作者 李为民 鲁瑞芳 +2 位作者 郭明 陈毓荃 彭学贤 《Acta Botanica Sinica》 CSCD 2001年第9期935-940,共6页
To mutagenize two conserved CCCT and PTK motifs in the central domain of Chinese strain of potato Y potyvirus (PVY-C) helper component proteinase (HC-Pro), four mutants of HC-Pro gene were obtained by PCR and site-dir... To mutagenize two conserved CCCT and PTK motifs in the central domain of Chinese strain of potato Y potyvirus (PVY-C) helper component proteinase (HC-Pro), four mutants of HC-Pro gene were obtained by PCR and site-directed mutagenesis, and then were inserted into the constitutive expression vector pBin438. Leaves from tobacco (Nicotiana tabacum L. cv. K326) were transformed with these four plant expression plasmids by Agrobacterium-mediated transformation, respectively. Southern and Western blotting analyses showed that these four mutants were integrated into tobacco genomic DNA and could express the corresponding proteins in most of die transgenic plants. The challenge of transgenic plants with potato X potexvirus (PVX) revealed that the expression products of PVY-C HC-Pro mutants in transgenic plants greatly abolished functions of HC-Pro in enhancing the accumulation and pathogenicity of PVX, indicating that CCCT and PTK motifs of HC-Pro were required for PVX/PVY synergism. Meanwhile, the results demonstrated that PVY-C HC-Pro had a function in accelerating the long-distance movement of PVX in these transgenic plants for the first time. 展开更多
关键词 potato Y potyvirus potato X potexvirus helper component proteinase gene mutation synergism
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Sonochemical Synthesis of Maleated Rosin 被引量:3
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作者 聂园梅 姚兴东 雷福厚 《Chinese Journal of Chemical Engineering》 SCIE EI CAS CSCD 2008年第3期365-368,共4页
The cycloaddition reaction of rosin and maleic anhydride under ultrasonic irradiation has been investigated. The results show that both isomerization and Diels-Alder cycloaddition reactions were accelerated remarkably... The cycloaddition reaction of rosin and maleic anhydride under ultrasonic irradiation has been investigated. The results show that both isomerization and Diels-Alder cycloaddition reactions were accelerated remarkably. The sonochemical reaction reached equilibrium in 5-10 min at 110℃, comparing with regular synthesis of 4-5 h over 180℃. 展开更多
关键词 SONOCHEMISTRY Diels-Alder reaction maleated rosin
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Suppression of Speckle in SAR Images Using Wavelet-Based HMM
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作者 张志明 王越 +1 位作者 陶然 周思永 《Journal of Beijing Institute of Technology》 EI CAS 2001年第1期86-92,共7页
In order to suppress the speckle appearing in synthesis aperture radar (SAR) images, a novel speckle reduction method based on wavelet domain hidden Markov tree (HMT) was proposed. First, the image was logarithmic tra... In order to suppress the speckle appearing in synthesis aperture radar (SAR) images, a novel speckle reduction method based on wavelet domain hidden Markov tree (HMT) was proposed. First, the image was logarithmic transformed to change the statistical property of the speckles. Then an HMT was constructed in the correspondent wavelet domain. Based on this model, the image signal was restored by maximum likelihood estimation and speckle noise was suppressed. Simulating SAR images had shown that the performance of the filter is satisfactory for both speckle smoothing and edges presentation, and for generating visually natural images as well. 展开更多
关键词 synthetic aperture radar (SAR) WAVELET hidden Markov model(HMM) noise suppression image processing
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Community structure changes of macrobenthos in the South Yellow Sea 被引量:3
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作者 张均龙 徐凤山 刘瑞玉 《Chinese Journal of Oceanology and Limnology》 SCIE CAS CSCD 2012年第2期248-255,共8页
The ecological environment in the Yellow Sea has changed greatly from the 1950s to 1990s and this has had significant impact on marine organisms. In this study, data on soft-sediment macrobenthos occurring in depths f... The ecological environment in the Yellow Sea has changed greatly from the 1950s to 1990s and this has had significant impact on marine organisms. In this study, data on soft-sediment macrobenthos occurring in depths from 25 m to 81 m in the South Yellow Sea were used to compare changes in community structure. The agglomerative classification (CLUSTER) and multidimensional scaling (MDS) methods were applied. Five communities were recognized by cluster analysis: 1. The Yellow Sea Cold Water Mass community dominated by cold water species, which changed slightly in species composition since the 1950s; 2. The mixed community with the coexistence of cold water species and warm water species, as had been reported previously; 3. The polychaete-dominated eurythermal community in which the composition changed considerably as some dominant species disappeared or decreased; 4. The Changjiang (Yangtze) River Estuarine community, with some typical estuarine species; 5. The community affected by the Yellow Sea Warm Current. The greatest change occurred in the coastal area, which indicated that the change may be caused by human activities. Macrobenthos in the central region remained almost unchanged, particularly the cold water species shielded by the Yellow Sea Cold Water Mass. The depth, temperature and median grain size of sediments were important factors affecting the distributions of macrobenthos in the South Yellow Sea. 展开更多
关键词 benthic macrofauna community structure South Yellow Sea Yellow Sea Cold Water Mass
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Epiphytic orchids and their ecological niche under anthropogenic influence in central Himalayas,Nepal 被引量:4
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作者 ADHIKARI Yagya Prasad FISCHER Anton FISCHER Hagen Siegfried 《Journal of Mountain Science》 SCIE CSCD 2016年第5期774-784,共11页
The survival chance of epiphytie orchids today not only depends on the natural site conditions required by the orchids but also on anthropogenic changes in site conditions. This study answers two questions: (1) Wha... The survival chance of epiphytie orchids today not only depends on the natural site conditions required by the orchids but also on anthropogenic changes in site conditions. This study answers two questions: (1) What is the ecological niche of the different epiphytic orchid species? (2) What are the ecological factors that threaten epiphytic orchid's population under anthropogenic disturbances? Our study area was the Kathmandu valley, Nepal, with its subtropical forest. We established 156 systematically selected sampling points in the Kathmandu area covering different types of ecosystems under human impacts such as densely populated area, agricultural land, mixed agricultural and settled area, old tree patches, and a natural forest in a national park. The ecological niche of the orchid species was analyzed with a principal component analysis (PCA). The correlations between the different site factors were statistically significant. Spearman's rank correlation matrices showed that the variables land-use intensities with altitude, and height with diameter in breast height (dbh) of host had the highest significant positive correlation coefficient (0.67 and 0.64 respectively). On the other hand, host bark pH and altitude as well as land use had a significantly strong negative correlation coefficient (-0.80 and -0.61, respectively). Different epiphytic orchid species interact differently with the given set of environmental factors: for occurrence of Vanda cristata there is no single environmental factor of special influence, while for Rhynehostylis retusa high bark pH and high light availability are important. First two axis of the PCA explained more than 50% of the total variance. Most orchid species occupy a specific, narrow niche in this ecological space. The main causes of anthropogenie influence of orchid population in the Kathmandu Valley are loss of adequate host trees (species and size) and increasing air pollution, resulting in increasing host bark pH. 展开更多
关键词 Host characteristics Epiphytic orchids Anthropogenic disturbances Canopy ecosystem Ecological niche HIMALAYAS
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Feasibility Comparison of Reanalysis Data from NCEP-I and NCEP-II in the Himalayas 被引量:3
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作者 XIE Aihong REN Jiawen +1 位作者 QIN Xiang KANG Shichang 《Journal of Mountain Science》 SCIE CSCD 2009年第1期56-65,共10页
Mt. Everest is often referred to as the earth's 'third' pole. As such it is relatively inaccessible and little is known about its meteorology. In 2005, an automatic weather station was operated at North Col (28... Mt. Everest is often referred to as the earth's 'third' pole. As such it is relatively inaccessible and little is known about its meteorology. In 2005, an automatic weather station was operated at North Col (28°1′ 0.95" N, 86°57′ 48.4" E, 6523 m a.s.l.) of Mt. Everest. Based on the observational data, this paper compares the reanalysis data from NCEP/NCAR (hereafter NCEP-Ⅰ) and NCEP-DOE AMIP-Ⅱ (NCEP- Ⅱ), in order to understand which reanalysis data are more suitable for the high Himalayas with Mr. Everest region. When comparing with those from the other levels, pressure interpolated from 500 hPa level is closer to the observation and can capture more synoptic-scale variability, which may be due to the very complex topography around Mt. Everest and the intricately complicated orographic land-atmosphereocean interactions. The interpolation from both NCEP-Ⅰ and NCEP-Ⅱ daily minimum temperature and daily mean pressure can capture most synopticscale variability (r〉0.82, n=83, p〈0.001). However, there is difference between NCEP-Ⅰ and NCEP-Ⅱ reanalysis data because of different model parameterization. Comparing with the observation, the magnitude of variability was underestimated by 34.1%, 28.5 % and 27.1% for NCEP-Ⅰ temperature and pressure, and NCEP-Ⅱ pressure, respectively, while overestimated by 44.5 % for NCEP-Ⅱ temperature. For weather events interpolated from the reanalyzed data, NCEP-Ⅰ and NCEP-Ⅱ show the same features that weather events interpolated from pressure appear at the same day as those from the observation, and some events occur one day ahead, while most weather events and NCEP-Ⅱ temperature interpolated from NCEP-Ⅰ happen one day ahead of those from the observation, which is much important for the study on meteorology and climate changes in the region, and is very valuable from the view of improving the safety of climbers who attempt to climb Mt. Everest. 展开更多
关键词 Mt. Everest NCEP/NCAR (NCEP-Ⅰ) NCEP-DOE AMIP-Ⅱ (NCEP-Ⅱ) daily minimumtemperature (DMinT) daily mean pressure(DMeanP) High Himalayas
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METABOLIC ABNORMALITIES IN MESIAL TEMPORAL LOBE EPILEPSY PATIENTS DEPICTED BY PROTON MR SPECTROSCOPY USING A 3.0T MR SCANNER 被引量:4
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作者 Jing-jing Lu Lian-kun Ren +6 位作者 Feng Feng Hui You Li-hua Zhang Ming-li Li Fei Sun Hai-hong Fu Zheng-yu Jin 《Chinese Medical Sciences Journal》 CAS CSCD 2006年第4期209-213,共5页
Objective To evaluate metabolic abnormalities in patients with mesial temporal lobe epilepsy (MTLE) with proton magnetic resonance spectroscopy (MRS) using a 3.0T MR scanner. Methods Sixty-three patients (32 wom... Objective To evaluate metabolic abnormalities in patients with mesial temporal lobe epilepsy (MTLE) with proton magnetic resonance spectroscopy (MRS) using a 3.0T MR scanner. Methods Sixty-three patients (32 women and 31 men) with diagnosed MTLE underwent diagnostic MR imaging (MRI) and proton MRS using a 3.0T MR scanner. The clinical history and interictal epileptiform discharges (IEDs) were recorded. Sixteen healthy volunteers served as control. The results of proton MRS were compared with the findings of electroencephalogram and structural MRI findings. Results Twenty-seven of the 63 patients with MTLE showed unilateral hippocampal sclerosis, and 9 showed bilateral hippocampal sclerosis. The concentration ratio of N-acytelaspartate (NAA) / [ creatine ( Cr ) + choline (Cho) ] in the hippocampal region of MTLE patients (0. 64±0. 07) was significantly lower than control (0. 80±0. 05, P = 0.023). In the patients with unilateral hippocampal sclerosis, NAA/(Cr + Cho) in the hippocampal region ipsilateral to the sclerotic hippocampus (0.56±0.06) was significantly lower than the ratio in the contralateral hippocampal region (0.69±0.07, P 〈 0. 001 ). There was significant difference in hippocampal NAA/( Cr + Cho) between the refractory patients and the non-refractory patients (0. 64±0. 05 vs.0.71±0. 07, P =0. 04). Forty-five patients were lateralized by IEDs, while 49 patients were lateralized by metabolite ratio. And lateralization determined by proton MRS and IEDs was concordant in 33 patients. Conclusions MRS as a noninvasive tool adds helpful metabolite information to routine MRI in evaluation of MTLE. The method is well established and should be a routine clinical application in the investigation of epilepsy. 展开更多
关键词 magnetic resonance spectroscopy temporal lobe epilepsy ELECTROENCEPHALOGRAM
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Plantlet regeneration from mature zygotic embryos andembryonic explants of masson pine (Pinus massoniana Lamb.)
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作者 HUANG JIANQIU ZHIMING WEI +1 位作者 WEI ZHOU ZHIHONG XU.(National laboratory of Plant Molecular Genetics, Shanghai Institute of Plant Physiology, Academia Sinica, Shanghai 200032,China) 《Cell Research》 SCIE CAS CSCD 1994年第2期155-162,共8页
Excised zygotic embryos, cotyledons and hypocotyls of juvenile seedlings of masson pine were grown on DCR medium supplemented with several concentrations of various plant phytohormones. BA (1.0 mg/ L) in combination w... Excised zygotic embryos, cotyledons and hypocotyls of juvenile seedlings of masson pine were grown on DCR medium supplemented with several concentrations of various plant phytohormones. BA (1.0 mg/ L) in combination with NAA (0.05 mg/L)in DCR medium was found to increase the formation of adventitious buds from mature zygotic embryos, but most of them were formed at the tips of embryonic cotyledons. Adventitious buds were obtained from cotyledons and hypocotyls from juvenile seedlings when they were cultured on DCR medium containing BA 3-5 mg/L and NAA 0.1-0.2 mg/L. Elongation of buds were observed on hormone-free DCR medium with or without activated charcoal (0.5%). Root initiation was achieved with full or half strength DCR inedium supplemented with IBA 1.0 mg/L and NAA 0.25-0.5 mg/L. Approximately 11-20 axillary buds formed on each explant when juvenile seedling explants were treated (3-20h) with BA 50-100 mg/L, followed by transfer to hormone-free DCR medium. The maximum number of shoots obtained per explant within six months was 33. 展开更多
关键词 Pinus massoniana Lamb. DCR medium mature zygotic embryos embryonic explants plantlet regeneration
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Effects of Boscalid on the Antioxidant Enzyme System of Adult Zebrafish (Danio rerio)
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作者 Xiaoxia ZANG Mingshan JI +6 位作者 Kai WANG Xiuwei LI Yang ZHANG Xinghai LI Hongzhe TIAN He ZHU Fang DU 《Agricultural Science & Technology》 CAS 2017年第2期287-293,共7页
Abstract [Objective] This study was conducted to evaluate the ecotoxicity of boscalid to adult zebrafish (Danio rerio). [Method] The activities of antioxidant enzymes superoxide dismutase (SOD), catalase (CAT), ... Abstract [Objective] This study was conducted to evaluate the ecotoxicity of boscalid to adult zebrafish (Danio rerio). [Method] The activities of antioxidant enzymes superoxide dismutase (SOD), catalase (CAT), peroxidase (POD), glutathione peroxidase (GPx), as well as a non-enzymatic antioxidant malondialdehyde (MDA), in the liver were measured 3, 7, 14 and 21 d post exposure (dpe) to 0.02 (1/100 of acute toxicity), 0.036 (monitored concentration), 0.08 (1/20 of acute toxicity), 0.16 (1/10 of acute toxicity) and 0.32 mg/L (1/5 of acute toxicity) boscalid using a semi-static method. [Result] SOD, CAT, POD, GPx and MDA activity in the liver of zebrafish varied with boscalid concentration and exposure time. Boscalid significantly enhanced MDA content at 21 dpe. A significant upregulation of the activity of SOD, CAT, POD and GPx at 7 dpe was observed, suggesting that boscalid resulted in oxidative stress and lipid peroxidation. [Conclusion] These results show that these biomarkers are all appropriate for monitoring oxidative stress and the lipid peroxidation status of fish after exposure to boscalid. Key words Boscalid; Zebrafish; Antioxidant enzyme 展开更多
关键词 BOSCALID ZEBRAFISH Antioxidant enzyme
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The Enlarged Moral Self
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作者 Melis Menent 《Cultural and Religious Studies》 2016年第9期531-552,共22页
Constitutional Patriotism is a new form of identity. It addresses the national component of identity formations in order to transform them in light of universal human rights principles. In this article, I seek to stre... Constitutional Patriotism is a new form of identity. It addresses the national component of identity formations in order to transform them in light of universal human rights principles. In this article, I seek to strengthen this theory left underdeveloped by Habermas. To do so, I use the idea of moral development which Habermas borrowed from Kohlberg. I argue that Constitutional Patriotism is the missing link in Habermas's reading of Kohlberg. I complement Kohlberg's reading of moral consciousness with the psychoanalytic idea of individuation. Communication, language, and autonomy all fall into their places in this interdisciplinary puzzle of Constitutional Patriotism spanning over the cultural terrain. This article takes part of the broader project of Constitutional Patriotism here only focusing on the notion of the selfhood. 展开更多
关键词 identity HABERMAS constitutional patriotism communication human rights KOHLBERG COSMOPOLITANISM autonomy PIAGET
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Volatile Constituents of Juniperus communis L., Taxus canadensis Marshall. and Tsuga canadensis (L.) Carr. from Canada
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作者 OEmer Kilic Alpaslan Kocak 《Journal of Agricultural Science and Technology(B)》 2014年第2期135-140,共6页
The essential oil composition leaves of Juniperus communis L., Taxus canadensis Marshall. and Tsuga canadensis (L.) Carr. from Canada were investigated by head space solid phase microextraction (HS-SPME) and gas c... The essential oil composition leaves of Juniperus communis L., Taxus canadensis Marshall. and Tsuga canadensis (L.) Carr. from Canada were investigated by head space solid phase microextraction (HS-SPME) and gas chromatography/mass spectrometry (GC-MS). Thirty-three, thirty and thirty-one components were identified representing 95.78%, 93.89%, 96.14% of the oil, respectively. Limonene (26.12%), benzene (15.62%), 13-mrycene (9.08%) and β-pinene (7.30%) were found to be the main constituents of J. communis; 1-propanone (36.38%), morpholine (10.95%), methylamine (9.10%) and methanone (8.14%) were detected main components of Taxus canadensis; bornylacetate (26.84%), α-pinene (23.74%), camphene (11.93%) and limonene (6.02%) were determined as major constituents of Tsuga canadensis. The chemical distributions of the essential oil compounds in the genus pattern were discussed in means of chemotaxonomy and natural products. 展开更多
关键词 JUNIPERUS TAXUS TSUGA essential oil CANADA HS-SPME GC-MS.
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Effect of contrasting climates on antioxidant and bioactive constituents in five medicinal herbs in Western Himalayas 被引量:1
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作者 Tarandeep KAUR Rohini BHAT Dhiraj VYAS 《Journal of Mountain Science》 SCIE CSCD 2016年第3期484-492,共9页
To understand the effect of climate change on constitutive antioxidant and biochemical metabolites in Western Himalayas, five medicinal herbs were selected and grown at two altitudes in Jammu(305 m) and Srinagar(1730 ... To understand the effect of climate change on constitutive antioxidant and biochemical metabolites in Western Himalayas, five medicinal herbs were selected and grown at two altitudes in Jammu(305 m) and Srinagar(1730 m) with subtropical and temperate climates, respectively.Significant variations were observed in phenols and flavonoids in Hypericum perforatum L., Matricaria chamomilla L., Thymus vulgaris L., Cynara cardunculus L. and Echinacea purpurea L. growing at two locations. High altitude temperate site show variable(up to 13 fold) increase in their content.Proteins(1.3- 1.8 times), sugars(2.8- 4.1 times) and free amino acid(1.04- 1.22 times) were also higher at Srinagar(1730 m). Within these plants, H.perforatum and M. chamomilla have shown higher accumulation of phenols, xanthophylls and proline even at subtropical environment in Jammu(305 m)suggesting potential for increasing their geographical area. The results demonstrate that changing environmental conditions significantly affect the bioactive constituents, which accumulate as a defence strategy by these temperate plants. Their medicinal significance during climate change scenario has also been discussed. 展开更多
关键词 Medicinal herbs Flavonoids Phenols Glutathione Western Himalayas Climate change
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The Importance of Marmaris Tourism Industry on Development and the Causes That Influence the Russian Tourists Coming to Marmaris
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作者 Aziz Bostan Zehra Turk Hande Akyurt Kurnaz 《Chinese Business Review》 2015年第1期28-40,共13页
Turkey, thanks to its natural and cultural tourism resources, is an international tourism destination characterized by intense mobility. The purpose of this study, to determine the contribution of the tourism sector i... Turkey, thanks to its natural and cultural tourism resources, is an international tourism destination characterized by intense mobility. The purpose of this study, to determine the contribution of the tourism sector in the country's economy and Russian tourist profile, was examined and investigated. Survey data collection techniques were used in the study. National and international researches were supported by literature. In this study, it was aimed to determine the role and the importance of Marmaris in the development of tourism in economy. It was also aimed to determine the cause of Russian tourists preferring Marmaris. The 12 questions in the questionnaire are to determine the demographic and travel characteristics, four questions are to determine the resources of accommodation and information of Russian tourists, and the questionnaire was completed with a question which was asked to determine the reason of preferring Marmaris, It was graded with the five-point Likert scale. The results of the study show the profile of Russian tourists who prefer Marmaris. It was examined that they have come up with all-inclusive system, they have two-week holiday term, they gather information through travel agencies, and Marmaris has an intensive revisit frequency. Marmaris is expressed as a great holiday destination by Russian tourists. Accordingly, Marmaris is popular among Russian tourists as a tourist destination and is considered to be quite suitable for the holidays. 展开更多
关键词 Russian tourist tourism Marmaris choice economic development tourism economy
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Synthesis, characterization and application of a dispersant based on rosin for coal-water slurry 被引量:11
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作者 Li Junguo Zhang Guanghua +1 位作者 Shang Ting Zhu Junfeng 《International Journal of Mining Science and Technology》 SCIE EI 2014年第5期695-699,共5页
A rosin derivative and maleopimaric acid diethanolamide(MAD), was synthesized, characterized by FTIR and1 H NMR, and applied as dispersant for the coal-water slurry(CWS) prepared from Chinese Shenfu coal. The CWS appl... A rosin derivative and maleopimaric acid diethanolamide(MAD), was synthesized, characterized by FTIR and1 H NMR, and applied as dispersant for the coal-water slurry(CWS) prepared from Chinese Shenfu coal. The CWS application performance investigation shows that the MAD dispersant has better abilities in reducing CWS viscosity and stabilizing the slurry than a commercial dispersant—sulfonated naphthalene-formaldehyde condensate(SNF). The physicochemical property investigation of the two tested dispersants shows that the adsorption amount of the MAD at coal-water interface is much larger than that of SNF, and the MAD has better wetting property than the SNF on the coal surface. It indicated that the excellent capabilities of MAD are related to the adsorption mode of standing upright on the coal surface. Based on the above, the mechanism of dispersion and stabilization of the CWS prepared from MAD dispersant is presented. 展开更多
关键词 Rosin derivative Coal-water slurry Dispersant Adsorption
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A novel synthesis of fluvoxamine maleate
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作者 WANG Jian-lin HU Yu-lai 《Journal of Chemistry and Chemical Engineering》 2009年第8期32-37,43,共7页
Fluvoxamine maleate is an excellent antidepressive drug. In the literatures, it was synthesized by the use of 4-(trifluoromethyl) aniline or 4-(trifluoromethyl) benzonitrile as starting materials and 5-methoxy-4'... Fluvoxamine maleate is an excellent antidepressive drug. In the literatures, it was synthesized by the use of 4-(trifluoromethyl) aniline or 4-(trifluoromethyl) benzonitrile as starting materials and 5-methoxy-4'-(trifluoromethyl-phenyl) valerophenone as a key intermediate. However, the methods in literatures have some disadvantages, such as the use of expensive materials, heavy pollution of environment, long reaction time and low yield of the product (only 30-40% overall yield). We herein report an environmentally friendly synthetic method of fluvoxamine maleate, which used 4-(trifluoromethyl) benzoic acid and tetrahydrofuran as starting materials and FeCI3 as catalyst for the coupling of acid chloride with Grignard reagent. The fluvoxamine maleate was synthesized in 46% overall yield, through the oximation, etheration and salification of the intermediate successively.This method has some advantages, such as the use of commercially available materials, low cost, short production period (12-14 h), high yield and light pollution. 展开更多
关键词 4-(trifluoromethyl) benzoic acid TETRAHYDROFURAN SYNTHESIS fluvoxamine maleate
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Somalis Diasporic Transnational Life--From Placelessness to Placeness in Finnish Urban Environment
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作者 Johanna Malmi 《Sociology Study》 2012年第4期301-314,共14页
About 1.S million Somalis live in the diaspora and first Somali asylum seekers came to Finland in 1990. Then they were the first large refugee group in Finland. They have got integration problems with Finnish society ... About 1.S million Somalis live in the diaspora and first Somali asylum seekers came to Finland in 1990. Then they were the first large refugee group in Finland. They have got integration problems with Finnish society and from that perspective the author started to doubt that whether migrants adopted the same kinds of relationship with the local places and which kind of influence it would have on their integration. The author's aim for this study has been to explore their sense of belonging from transnational family and geographical perspectives. Relph argued that placelessness could be created either by individual itself or urban planning. With the content analyses the author analyzed 50 questions from seven respondents. The questionnaire includes the part of transnational contact keeping among kin members of transnational family, migration and respondents' sense toward urban surrounding where they lives. Emotional ties play a maior role in Finnish Somalis' diasporic life. Emotions intertwine around their life as members of transnational family and toward sense of place. Transnational family affects their perspectives toward western society and urban places. Placelessness is the first step toward integration and positive sense of place. With the integration placelessness turns to placeness. 展开更多
关键词 Somalis transnational family placelessness INTEGRATION
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