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Experimental investigation of fluidized-bed reactor performance for oxidative coupling of methane

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Journal of natural Gas chemistry 2012年第5期21卷 534-543页

作者： S.jašo S.sadjadi H.r.Godini U.Simon S.Arndt O.Görke A.Berthold H.Arellano-Garcia H.Schubert r.Schomäcker G.Wozny chair of Process dynamics and Operation Berlin Institute of TechnologyStraβe des 17 Juni 135Sekr.KWT910623 BerlinGermany Institute for Material Science and Technologies Berlin Institute of TechnologyHardenbergstr.4010623 BerlinGermany Institute for Technical chemistry Berlin Institute of TechnologyStraβe des 17 Juni 12410623 BerlinGermany

Performance of the oxidative coupling of methane in fluidized-bed reactor was experimentally investigated using Mn-na2WO4/SiO2,La2O3/caO and La2O3-SrO/caO *** catalysts were found to be stable,especially Mn-na2WO4/SiO2 *** effect of sodium content of this catalyst was analyzed and the challenge of catalyst agglomeration was addressed using proper catalyst composition of 2%Mn2.2%na2WO4/*** other two catalysts,the effect of Lanthanum-Strontium content was analyzed and 10%La2O 3-20%SrO/caO catalyst was found to provide higher ethylene yield than La2O3/caO ***,the effect of operating parameters such as temperature and methane to oxygen ratio were also *** highest ethylene and ethane （c2） yield was achieved with the lowest methane to oxygen ratio around 2.40.5% selectivity to ethylene and ethane and 41% methane conversion were achieved over La2O3-SrO/caO catalyst while over Mn-na2WO4 /SiO2 catalyst,40% and 48% were recorded,***,the consecutive effects of nitrogen dilution,ethylene to ethane production ratio and other performance indicators on the down-stream process units were qualitatively discussed and Mn-na2WO4/SiO2 catalyst showed a better performance in the reactor and process scale analysis.

关键词： oxidative coupling of methane (OcM) fluidized-bed reactor catalyst stability

Materials and devices for flexible and stretchable photodetectors and light-emitting diodes

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nano research 2021年第9期14卷 2919-2937页

作者： Jun-Kyul Song Min Sung Kim Seungwon Yoo ja Hoon Koo dae-Hyeong Kim center for nanoparticle research Institute for Basic Science(IBS)Seoul 08826Republic of Korea School of chemical and Biological Engineering and Institute of chemical Processes Seoul National UniversitySeoul 08826Republic of Korea Interdisciplinary Program for Bioengineering Seoul National UniversitySeoul 08826Republic of Korea department of Materials Science and Engineering Seoul National UniversitySeoul 08826Republic of Korea

recently,significant efforts have been directed at overcoming the limitations of conventional rigid optoelectronic devices,particularly their poor mechanical stability under bending,folding,and stretching *** of major approaches for rendering optoelectronic devices mechanically deformable is to replace the conventional electronic/optoelectronic materials with functional nanomaterials or organic materials that are intrinsically flexible/***,advanced device designs and unconventional fabrication methods have also contributed to the development of soft optoelectronic ***,new devices such as bio-inspired curved image sensors,wearable light emitting devices,and deformable bio-integrated optoelectronic devices have been *** this review,recent progress in the development of soft optoelectronic materials and devices is ***,various materials such as nanomaterials,organic materials,and their hybrids that are suitable for developing deformable photodetectors,are ***,the nanomaterials and organic/polymeric materials that are applicable in deformable light-emitting diodes are ***,representative system-level applications of flexible and stretchable photodetectors and light-emitting diodes are reviewed,and future prospects are discussed.

关键词： nanomaterial organic material photodetector light-emitting diode flexible optoelectronics stretchable optoelectronics

computational Prediction of Micro rnAs from Toxoplasma gondii Potentially regulating the Hosts' Gene Expression

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Genomics, Proteomics & Bioinformatics 2014年第5期12卷 228-238页

作者： Müs?erref duygu saar caner Bagc? Jens Allmer Molecular Biology and Genetics Izmir Institute of Technology Urla Izmir 35430 Turkey Biotechnology Izmir Institute of Technology Urla Izmir 35430 Turkey Bionia Incorporated IZTEKGEB A8 Urla Izmir 35430 Turkey

MicrornAs （mirnAs） were discovered two decades ago, yet there is still a great need for further studies elucidating their genesis and targeting in different phyla. Since experimental discovery and validation of mirnAs is difficult, computational predictions are indispensable and today most computational approaches employ machine learning. Toxoplasma gondii, a parasite residing within the cells of its hosts like human, uses mirnAs for its post-transcriptional gene reg- ulation. It may also regulate its hosts＇ gene expression, which has been shown in brain cancer. Since previous studies have shown that overexpressed mirnAs within the host are causal for disease onset, we hypothesized that T. gondii could export mirnAs into its host cell. We computationally predicted all hairpins from the genome of T. gondii and used mouse and human models to filter possible candidates. These were then further compared to known mirnAs in human and rodents and their expression was examined for T. gondii grown in mouse and human hosts, respectively. We found that among the millions of potential hairpins in T. gondii, only a few thousand pass filtering using a human or mouse model and that even fewer of those are expressed. Since they are expressed and differentially expressed in rodents and human, we suggest that there is a chance that T. gondii may export mirnAs into its hosts for direct regulation.

关键词： Toxoplasma gondii MicrornA regulation Host interaction Parasite

Effect of aging on behaviour of mesenchymal stem cells

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World Journal of Stem cells 2019年第6期11卷 337-346页

作者： Juan Antonio fafián-Labora Miriam Morente-López María c Arufe Grupo de Terapia celular y Medicina regenerativa Departamento de Fisioterapia Ciencias Biomédicas y MedicinaUniversidade da Coru?a

Organs whose source is the mesoderm lineage contain a subpopulation of stem cells that are able to differentiate among mesodermal derivatives (chondrocytes, osteocytes, adipocytes). This subpopulation of adult stem cells, called “mesenchymal stem cells” or “mesenchymal stromal cells (MScs)”, contributes directly to the homeostatic maintenance of their organs;hence, their senescence could be very deleterious for human bodily functions. MScs are easily isolated and amenable their expansion in vitro because of the research demanding to test them in many diverse clinical indications. All of these works are shown by the rapidly expanding literature that includes many in vivo animal models. We do not have an in-depth understanding of mechanisms that induce cellular senescence, and to further clarify the consequences of the senescence process in MScs, some hints may be derived from the study of cellular behaviour in vivo and in vitro, autophagy, mitochondrial stress and exosomal activity. In this particular work, we decided to review these biological features in the literature on MSc senescence over the last three years.

关键词： Mesenchymal stem cells Aging Autophagy Mitochondrial stress Extracellular vesicles

《米拉日巴传》的文学特征研究——以瑞白敬坚所著版本为例

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《米拉日巴传》的文学特征研究——以瑞白敬坚所著版本为例

作者：扎西拉杰（ta shi lha ja）西北民族大学

学位级别：硕士

藏族文学史上传记和证道记虽词汇上大不相同,二者在体裁上混淆不清,学界对此置之不理,迄今为止未划分其界限。不仅如此,藏学界未出现较为全面的传记文学理论或者传记文学史,进而藏族传记文学处于滞后状态。为此,本论文认为产生此现象的... 详细信息

藏族文学史上传记和证道记虽词汇上大不相同,二者在体裁上混淆不清,学界对此置之不理,迄今为止未划分其界限。不仅如此,藏学界未出现较为全面的传记文学理论或者传记文学史,进而藏族传记文学处于滞后状态。为此,本论文认为产生此现象的直接原因不出二。一是没有理论的指导;二是没有明了文学概念。因而,本论文借用久负盛名的《米拉日巴传》为中心,通过解析其文学特征对这一问题做出思考。本文包括五章的内容,第一章对传记的概念、本质、结构等进行了分析;第二章详细介绍了《米拉日巴传》及作者、国内外各种不同版本等。第三、四章分别为米拉日巴传记的思想色彩与故事性、趣味性、形象性等文学特征作了阐述;附加一节考证了印度本生记在思想和结构两个方面对藏族传记文学的深渊影响。第五章研究了此传记在藏族文学领域的影响、历史地位、区别文学传记与历史传记的意义,尾段总结了此传记的弊端。

关键词：米拉日巴传记文学特征

Operational Implementation of the ATOvS Processing Procedure in KMA and Its validation

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Advances in Atmospheric Sciences 2003年第3期20卷 398-414页

作者： Myoung-Hwan AHn Mee-ja KIM chu-Yong cHUnG Ae-Sook SUH remoteSensing research Laboratory/Meteorological research Institute RemoteSensing Research Laboratory/Meteorological Research InstituteRemoteSensing Research Laboratory/Meteorological Research InstituteRemoteSensing Research Laboratory/Meteorological Research Institute Seoul 156-720KoreaSeoul 156-720KoreaSeoul 156-720KoreaSeoul 156-720Korea

The Korea Meteorological Administration (KMA) has processed the data from the advanced TOvS (ATOvS) onboard nOAA-16 satellite since May 2001. The operational production utilizes the AAPP (ATOvS and AvHrr Processing Package) of EUMETsaT and IAPP (International ATOvS Processing Package) of the University of Wisconsin. For the initial guess profiles, the predicted fields (usually 6 to 12 hour forecasted fields) from the global aviation model of nOAA/ncEP are used. The average number of profiles retrieved from the ATOvS data is about 1,300 for each morning and afternoon orbit at about 18 and 06 UTc, respectively. The retrieved temperature and dew point temperatures are provided to forecasters in real time and used for initialization of prediction models. With the advanced microwave sensor (AMSU; Advanced Microwave Sounding Unit), accuracy of the ATOvS products is expected to be better than that of the TOvS products, especially in cloudy conditions. Indeed, the preliminary results from a validation study with the collocated radiosonde data during a 8-month period, from May to december 2001, for the East Asia region show an improved accuracy of the ATOvS products for cloudy skies versus the TOvS, especially for higher altitudes. The rMS (root Mean Square) difference between the ATOvS products and radiosonde data is about 1.3°c for both clear and cloudy conditions, except for near the ground and at higher altitudes, at around 200 hPa. There is no significant temporal variation of the error statistics at all pressure levels. In case of the water vapor mixing ratio, the largest difference is shown at lower altitudes, while the accuracy is much better for the clear sky cases than the cloudy sky cases. The bias and rMSE at lower altitudes is about 0.557 g kg−1 and 2.5 g kg−1 and decrease significantly with increasing altitude.

关键词： ATOvS Processing and validation temperature and humidity profiles

Lactic Acid Fermentation from coffee Ground Waste Hydrolysate by Lactobacillus rhamnosus

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Journal of renewable Materials 2019年第4期7卷 365-372页

作者： ja-ryong Koo Hye Min Park Se Kyung Kim Hyun Shik Yun department of Biological Engineering Inha UniversityIncheon 22212Korea Institute of Industrial Biotechnology Inha University Research and Business FoundationIncheon 22212Korea

Lactic acid is an important organic acid that is widely used in the food,pharmaceutical,and cosmetic *** acid was produced from coffee ground waste which contains fermentable sugars and is increasingly generated from our daily dietary *** 114 strains of Lactobacillus species,Lactobacillus rhamnosus ATcc 10863 was selected for the production of lactic acid from coffee ground *** alkali pretreatment and saccharification,cellulose and hemicellulose in coffee ground waste were converted into fermentable *** experiments were conducted at various alkali solution,concentrations,and *** pretreatment with 35 g/L of KOH at 121oc for 60 min,the highest concentration of fermentable sugars was *** optimum concentration of viscozyme L was 2%when saccharification was proceeded at 55oc for 7 *** productivity of lactic acid fermentation was the highest(0.59 g/L/h)at 100 g of coffee ground waste(1x concentration),whereas the lactic acid concentration was the highest at 600 g of coffee ground waste(6x concentration).As the concentration of coffee ground increased,the lactic acid concentration was also increased,however,the amount was not proportional to the coffee ground waste *** this study,it was found that coffee ground waste could be used as a culture medium for Lactobacillus rhamnosus ATcc 10863 through pretreatment and saccharification for the production of lactic acid.

关键词： coffee ground waste Lactobacillus rhamnosus lactic acid fermentable sugars saccharification alkali pretreatment

Successful outcome following resection of a pancreatic liposarcoma with solitary metastasis

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World Journal of Gastroenterology 2005年第48期11卷 7684-7685页

作者： IM dodo ja Adamthwaite P jain A roy PJ Guillou Kv Menon department of Academic Surgery

Liposarcomas are rare soft tissue tumors, commonly affecting the lower limbs and less commonly the retroperitoneum. Although other organs can be affected,the pancreas is one of the rarest, and metastasis at presentation has never been reported. We describe the case of a 76-year-old gentleman presenting with abdominal pain and an abdominal mass. Imaging confirmed a primary tumor in the body and tail of the pancreas, with a metastatic deposit in the mesentery adjacent to the second part of the duodenum. Biopsy confirmed a liposarcoma, and subsequently a complete surgical excision was achieved. He then received adjuvant radiotherapy and has remained disease free for the next 26 mo.

关键词： Pancreas Liposarcoma Metastasis

电力工业互联网下的新能源场站面临的威胁和解决方案探析

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水电站机电技术 2024年第6期47卷 121-125页

作者：牛国智曾佳佳谭振国五凌电力有限公司新能源分公司湖南长沙410029

近年来,随着我国新能源产业的快速发展,许多电力企业已经开始转向风电、光伏发电等新能源方向,并正在改变其能源结构,同时也给监控和数据采集(ScadA)系统带来了巨大的网络安全风险。基于物联网的新能源场站是关键的基础设施,具有复杂的... 详细信息

近年来,随着我国新能源产业的快速发展,许多电力企业已经开始转向风电、光伏发电等新能源方向,并正在改变其能源结构,同时也给监控和数据采集(ScadA)系统带来了巨大的网络安全风险。基于物联网的新能源场站是关键的基础设施,具有复杂的架构并包含关键设备。其通信系统通信的机密性、完整性或可用性被破坏时,可能导致国家安全受损、公共秩序混乱、生命财产遭受重大损失。本文基于物联网的新能源场站面临的威胁和潜在解决方案,分析了电力工业互联网下的新能源场站的现状及漏洞,提出了新能源场站抵御攻击策略,并深入了解新能源场站的网络安全态势,旨在解决潜在组件的漏洞,检测恶意活动,增强网络安全性,保护客户隐私。

关键词：电力新能源场站网络安全物联网