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Basic Lithofacies-Succession Model for the Wumishan Cyclothems: Their Markov Chain Analysis and Regularly Vertical Stacking Patterns in the Third-Order Sequences 被引量:19
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作者 MEI Mingxiang, MA Yongsheng and GUO Qingyin Institute of Earth Sciences and Natural Resources, China University of Geosciences, Beijing 100083 China Petrochemical Corporation (SINOPEC), Beijing 100029 《Acta Geologica Sinica(English Edition)》 SCIE CAS CSCD 2001年第4期421-431,共11页
The Mesoproterozoic Wumishan Formation in the Jixian section of Tianjin is a succession of 3300-m-thick carbonate strata formed in a period of about 100 Ma (1310±20 Ma-1207±10 Ma). In this succession of stra... The Mesoproterozoic Wumishan Formation in the Jixian section of Tianjin is a succession of 3300-m-thick carbonate strata formed in a period of about 100 Ma (1310±20 Ma-1207±10 Ma). In this succession of strata, the carbonate metre-scale cyclic sequences belonging to peritidal type with an approximately symmetrical lithofacies-succession are best developed. The wide development of 1:4 stacking patterns shows that these metre-scale cyclic sequences are genetically related to the short-eccentricity cycles, which are called the Wumishan cyclothems that could truly represent sedimentary cycles. Generally, massive and thick-bedded calcareous dolomites and dolomitic limestones of stromatolite biostromes and thrombolite bioherms constitute the central part of the Wumishan cyclothems. The lower and upper parts consist of tidal flat dolostones, sandy-muddy dolostone and the top part is composed of lagoonal facies dolomitic shales with a paleosol cap. Therefore, an approximately symmetrical lithofacies-succession is formed. Many features such as the clear deepening and shoaling vectors of cyclothems, and all kinds of marks of fresh-water diagenesis indicate that the Wumishan cyclothems are the product of autocyclic sedimentation governed by allocyclic high-frequency sea-level changes. The results of a Markov chain analysis reaffirm the existence of the lithofacies-succession model of the Wumishan cyclothems. The boundaries of the Wumishan cyclothems are marked by the instantaneous exposed punctuated surface, which leads to the discrepancy between the cyclothems and the parasequences of the sequence stratigraphy terminology system. It is difficult to form a judgment that the time span of the Milankovitch cycles in the Precambrian is certainly equal to that of the Phanerozoic, but the regularly vertical stacking patterns of the seventh-order rhythms, sixth-order cyclothems and fifth-order parasequence sets still indicate their consistency with the duration of the Milankovitch cycles in the Phanerozoic. 展开更多
关键词 Wumishan cyclothems Markov chain analysis MESOPROTEROZOIC Jixian section TIANJIN
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Analysis and Investigation on the Core Competitiveness of Textile and Underwear Industry in the Mainland and Taiwan of China and Myanmar under the Global Value Chain
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作者 Haichao Wu Lan Luo +3 位作者 Yingshan Zeng Rudan Wang Yue Zhang Chien Chi Chu 《Journal of Sustainable Business and Economics》 2022年第2期22-34,共13页
All the way in the “area”, “comprehensive economic partnership agreement” (RCEP), Association of Southeast Asian Nations (ASEAN) free trade area, the main economic corridor construction under the background of suc... All the way in the “area”, “comprehensive economic partnership agreement” (RCEP), Association of Southeast Asian Nations (ASEAN) free trade area, the main economic corridor construction under the background of success, the mainland and Taiwan of China and southeast Asia has established the important relations of cooperation, industries are beginning to consider labor costs, raw materials, using the regional to invest policy and market comparative advantage. This paper starts from the investigation of Topline’s core competitiveness in China and Myanmar, and focuses on the analysis of lingerie industry in China and Myanmar, and the analysis of women’s underwear industry from the perspective of global value chain (GVC). Through the data analysis of the questionnaire survey, this paper summarizes the problems existing in the current situation of the industry, uses the intermediary analysis to analyze the correlation between the two variables, reveals the role of the core competitiveness of enterprises, and uses the GVC theory to analyze the problems existing in the industry of enterprises and their causes. According to relevant theories, the optimization path of enterprise value chain is put forward. 展开更多
关键词 Global value chain analysis The questionnaire survey Textile industry Southeast Asia Intermediary role
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Small ruminant value chain in Al-Ruwaished District,Jordan
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作者 Rula AWAD Hosam TITI +2 位作者 Aziza MOHAMED-BRAHMI Mohamed JAOUAD Aziza GASMI-BOUBAKER 《Regional Sustainability》 2023年第4期416-424,共9页
This study aims to assess the small ruminant value chain in Al-Ruwaished District,Jordan,to identify the potential intervention areas that could improve the production efficiency and guarantee the sustainability of th... This study aims to assess the small ruminant value chain in Al-Ruwaished District,Jordan,to identify the potential intervention areas that could improve the production efficiency and guarantee the sustainability of the small ruminant sector in this area.Sheep breeding is the source of livelihood for most of the people in Al-Ruwaished District,which is characterized by the large number of sheep and goats.We surveyed 5.0% of the small ruminant holders in the study area and conducted individual interviews and surveys with the potential actors in the value chain to undertake a small ruminant value chain analysis.From the survey,we found that the small ruminant value chain consists of five core functions,namely,input supply,production management,marketing,processing,and consumption.Despite the stable impression given by the large number of holdings in the small ruminant sector,the surveyed results show a clear fragility in the value chain of small ruminants in this area.The small ruminant production system is negatively impacted by climate change,especially continuous drought.In addition,the high prices of feed that the farmer cannot afford with clear and real absence of the governmental and non-governmental support activities also impact the development of the value chain.The results of strengths,weaknesses,opportunities,and threats(SWOT)analysis reveal that the major constraints faced by this value chain could be divided into external and internal threats.Specifically,the most prominent external threats are the nature of the desert land and continuous drought,while the major internal threats are the absence of appropriate infrastructure,shortage of inputs,and weakness in the production management and marketing.We proposed solutions to these challenges to ensure the sustainability and effectiveness of the sector,such as the formulation of emergency response plans to severe weather,qualifying farmers’skills,and establishment of agricultural cooperative societies. 展开更多
关键词 Value chain analysis Small ruminants Strengths weaknesses opportunities and threats(SWOT)analysis Climate change Livestock production management JORDAN
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Numerical analysis of ossicular chain lesion of human ear 被引量:12
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作者 Yingxi Liu Sheng Li Xiuzhen Sun 《Acta Mechanica Sinica》 SCIE EI CAS CSCD 2009年第2期241-247,共7页
Abstract Lesion of ossicular chain is a common ear disease impairing the sense of hearing. A comprehensive numerical model of human ear can provide better understanding of sound transmission. In this study, we propose... Abstract Lesion of ossicular chain is a common ear disease impairing the sense of hearing. A comprehensive numerical model of human ear can provide better understanding of sound transmission. In this study, we propose a three-dimensional finite element model of human ear that incorporates the canal, tympanic membrane, ossicular bones, middle ear suspensory ligaments/muscles, middle ear cavity and inner ear fluid. Numerical analysis is conducted and employed to predict the effects of middle ear cavity, malleus handle defect, hypoplasia of the long process of incus, and stapedial crus defect on sound transmission. The present finite element model is shown to be reasonable in predicting the ossicular mechanics of human ear. 展开更多
关键词 Finite element model Ossicular chain lesionAcoustic-structural coupled analysis Middle ear cavity Sound transmission
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Calibration chain design based on integrating sphere transfer radiometer for SI-traceable on-orbit spectral radiometric calibration and its uncertainty analysis 被引量:1
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作者 赵维宁 方伟 +2 位作者 孙立微 崔立红 王玉鹏 《Chinese Physics B》 SCIE EI CAS CSCD 2016年第9期276-283,共8页
In order to satisfy the requirement of SI-traceable on-orbit absolute radiation calibration transfer with high accuracy for satellite remote sensors,a transfer chain consisting of a fiber coupling monochromator(FBM)... In order to satisfy the requirement of SI-traceable on-orbit absolute radiation calibration transfer with high accuracy for satellite remote sensors,a transfer chain consisting of a fiber coupling monochromator(FBM) and an integrating sphere transfer radiometer(ISTR) was designed in this paper.Depending on the Sun,this chain based on detectors provides precise spectral radiometric calibration and measurement to spectrometers in the reflective solar band(RSB) covering 300–2500 nm with a spectral bandwidth of 0.5–6 nm.It shortens the traditional chain based on lamp source and reduces the calibration uncertainty from 5% to 0.5% by using the cryogenic radiometer in space as a radiometric benchmark and trap detectors as secondary standard.This paper also gives a detailed uncertainty budget with reasonable distribution of each impact factor,including the weak spectral signal measurement with uncertainty of 0.28%.According to the peculiar design and comprehensive uncertainty analysis,it illustrates that the spectral radiance measurement uncertainty of the ISTR system can reach to 0.48%.The result satisfies the requirements of SI-traceable on-orbit calibration and has wider significance for expanding the application of the remote sensing data with high-quality. 展开更多
关键词 SI-traceable calibration on-orbit high-accuracy transfer chain integrating sphere transfer radiometer uncertainty analysis
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Genotyping of RHD by multiplex polymerase chain reaction analysis of six RHD-specific exons in Chinese population
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《中国输血杂志》 CAS CSCD 2001年第S1期359-,共1页
关键词 RHD Genotyping of RHD by multiplex polymerase chain reaction analysis of six RHD-specific exons in Chinese population
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Financing Decisions Analysis of E-commerce Supply Chain Finance for Fresh Agricultural Products in China
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作者 Ning Xian 《Journal of Finance Research》 2021年第2期1-5,共5页
The supply chain finance(SCF)solutions are becoming increasingly diversified with the continuous perfection of the economic system.However,financing for small and medium sized enterprises(SMEs)is still a difficult iss... The supply chain finance(SCF)solutions are becoming increasingly diversified with the continuous perfection of the economic system.However,financing for small and medium sized enterprises(SMEs)is still a difficult issue waiting to be solved by enterprises and the government in China.SCF solutions based on e-commerce platforms have developed rapidly in China that provide an alternative for SMEs when few studies have been conducted on e-commerce SCF solutions which focus on fresh agricultural products.Therefore,this research focuses on the SCF solutions applicable to e-commerce enterprises of fresh agricultural products. 展开更多
关键词 E-commerce supply chain finance SCF solutions SMEs supply chain financing decision analysis Supply chain management Fresh agricultural products
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Sequencing of hepatitis C virus cDNA with polymerase chain reaction directed sequencing *
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作者 魏来 王宇 +1 位作者 陈红松 陶其敏 《World Journal of Gastroenterology》 SCIE CAS CSCD 1997年第1期18+15-17,15-17,共4页
AIM To explore a rapid and easy sequencing method for hepatitis C virus (HCV) genome, and establish a new sequencing method in China. METHODS Polymerase Chain Reaction (PCR) was combined with DNA sequencing techn... AIM To explore a rapid and easy sequencing method for hepatitis C virus (HCV) genome, and establish a new sequencing method in China. METHODS Polymerase Chain Reaction (PCR) was combined with DNA sequencing technique. PCR products were purified by agarose gel electrophoresis, polyacrylamide gel electrophoresis (PAGE), Polyethylene glycol (PEG) respectively. Then in the presence of a 5′ labeling PCR primer, purified PCR products were directly sequenced. By this method, HCV NS5b cDNA from two HCV infected individuals (HC 42 and HC 49) were sequenced. 展开更多
关键词 Hepatitis C virus DNA viral DNA complementary Polymerase chain reaction Sequence analysis DNA Mutation
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An Audit of Constraints and Opportunities in Kenya's Livestock Export Value Chain
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作者 Patrick Irungu Peter Ithondeka +3 位作者 Esther Wafula Sabenzia Wekesa Hezron Wesonga Thomas Manga 《Journal of Agricultural Science and Technology(B)》 2014年第2期102-120,共19页
For a long time Kenya has desired to access lucrative export markets for her livestock products. Although this desire matches the growing global demand for livestock products and increasing interest in livestock produ... For a long time Kenya has desired to access lucrative export markets for her livestock products. Although this desire matches the growing global demand for livestock products and increasing interest in livestock products from Kenya by livestock deficient countries, Kenya has not been able to meet the expressed demand. The reasons for this failure have not been sufficiently documented. This study used the value chain approach to assess and document the factors that limit Kenya's export trade in livestock. Questionnaire interviews were undertaken with livestock producers, traders, processors and importers. Producers cited livestock diseases, poor roads, drought, livestock theft and insecurity as the main constraints to livestock supply. Livestock traders mentioned high cost and delays in obtaining movement permits, rent-seeking and disturbance by government officials along the stock routes as some of the constraints. Processors on the other hand mentioned Kenya's failure to meet the international sanitary requirements. The only importer interviewed indicated that trade restrictions, Kenya's inability to control livestock diseases and distance were the main constraints to increased livestock trade with Kenya. Stakeholders in Kenya's livestock export value chain should address these and other constraints in order to revitalize this vital sector. 展开更多
关键词 Livestock export trade value chain analysis Kenya.
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Research on The Factors Affecting Profit Allocation Based on Virtual Supply Chain 被引量:5
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作者 Song Liu Jiasheng Song 《Chinese Business Review》 2004年第10期1-11,28,共12页
Traditional profit allocation solutions cannot be effectively applied to the practice for the limitations in their premises and principles. This paper based on the practical processes of virtual supply chain performs ... Traditional profit allocation solutions cannot be effectively applied to the practice for the limitations in their premises and principles. This paper based on the practical processes of virtual supply chain performs analysis on major factors relative to cost and risk which effect the profit allocation among the partners, and then proposes the quantitative relations between the factors and profit allocation. The relations can serve as a base for further research on extensive profit allocation model. 展开更多
关键词 virtual supply chain profit allocation risk analysis
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Correlation between mitochondrial TRAP-1 expression and lymph node metastasis in colorectal cancer 被引量:12
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作者 Jing-Yan Gao Bao-Rong Song +1 位作者 Jun-Jie Peng Yuan-Ming Lu 《World Journal of Gastroenterology》 SCIE CAS CSCD 2012年第41期5965-5971,共7页
AIM: To evaluate the effect of mitochondrial tumor ne- crosis factor receptor-associated protein-1 (TRAP-l) on the lymph node metastasis (LNM) in Chinese colorectal cancer (CRC) patients, and develop potential ... AIM: To evaluate the effect of mitochondrial tumor ne- crosis factor receptor-associated protein-1 (TRAP-l) on the lymph node metastasis (LNM) in Chinese colorectal cancer (CRC) patients, and develop potential LNM- associated biomarkers for CRC using quantitative real- time polymerase chain reaction (RT-PCR) analysis. METHODS: Differences in mitochondrial TRAP-1 gene expression between primary CRC with LNM (LNM CRC) and without LNM (non-LNM CRC) were assessed in 96 Chinese colorectal carcinoma samples using quantita- tive RT-PCR analysis, Western blotting, and confirmed with immunohistochemical assay. The relationship between clinicopathological parameters and potential diaclnostic biomarkers was also examined.RESULTS: TRAP-1 was significantly upregulated in LNM CRC compared with non-LNM CRC, which was confirmed by RT-PCR, Western blotting and immuno- histochemical assay. The expression of TRAP-1 in two different metastatic potential human colorectal cancer cell lines, LoVo and HT29, was analyzed with Western blotting. The expression level of TRAP-1 was dramati- cally higher in LoVo than in HT29. Overexpression of TRAP-1 was significantly associated with LNM (90.2% in LNM group vs 22% in non-LNM group, P 〈 0.001), the advanced tumor node metastasis stage (89.1% in LNM group vs 26.9% in non-LNM group, P 〈 0.001), the increased 5-year recurrence rate (82.7% in LNM group vs 22.6% in non-LNM group, P 〈 0.001) and the decreased 5-year overall survival rate (48.4% in LNM vs 83.2% in non-LNM group, P 〈 0.001). Univariate and multivariate analyses indicated that TRAP-1 expression was an independent prognostic factor for recurrence and survival of CRC patients (Hazard ratio of 2.445 in recurrence, P = 0.017; 2.867 in survival, P = 0.028). CONCLUSION: Mitochondria TRAP-1 affects the lymph node metastasis in CRC, and may be a potential bio- marker for LNM and a prognostic factor in CRC. Over- expression of TRAP-1 is a predictive factor for the poor outcome of colorectal cancer patients. 2012 Baishideng. All rights reserved 展开更多
关键词 Colorectal cancer Lymph node metastasis PROGNOSIS Quantitative real-time polymerase chain reaction analysis Hsp90 family Mitochondria tumor necrosis factor receptor-associated protein-1
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Are the Methods of the Net Present Value Rate and Net Annual Value Rate the Effective Scheme Comparison Methods
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作者 Guojie Zhao Gang Lu 《Chinese Business Review》 2005年第8期78-81,共4页
As for the dispute about the best-choosing method of mutually-exclusive scheme and index selection, this text proves that there is an error to make a point that using net present value rate or net annual value rate, t... As for the dispute about the best-choosing method of mutually-exclusive scheme and index selection, this text proves that there is an error to make a point that using net present value rate or net annual value rate, the most scientific and effective method is chain-system differential analysis and the most short-cutting method is the method of net annual value, to select the NA V maximum scheme. 展开更多
关键词 mutually exclusive scheme net present value net annual value chain system differential analysis
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Scalable near-repeat and event chain calculations over heterogeneous computer architecture and systems
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作者 Xinyue Ye Xuan Shi Zhong Chen 《Big Earth Data》 EI 2017年第1期191-203,共13页
As a case of space-time interaction,near-repeat calculation indicates that when an event takes place at a certain location,its immediate geographical surroundings would face an increased risk of experiencing subsequen... As a case of space-time interaction,near-repeat calculation indicates that when an event takes place at a certain location,its immediate geographical surroundings would face an increased risk of experiencing subsequent events within a fairly short period of time.This paper presents an exploratory study that extends the investigation of the near-repeat phenomena to a series of space-time interaction,namely event chain calculation.Existing near-repeat tools can only deal with a limited amount of data due to computation constraints,let alone the event chain analysis.By deploying the modern accelerator technology and hybrid computer systems,this study demonstrates that large-scale near-repeat calculation or event chain analysis can be partially resolved through high-performance computing solutions to advance such a challenging statistical problem in both spatial analysis and crime geography. 展开更多
关键词 Parallel and high-performance computing near-repeat event chain analysis crime analysis
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Nucleoprotein gene analysis of the wild-type measles viruses circulated in Beijing in 2001
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作者 谢正德 申昆玲 +2 位作者 许文波 照日格图 朱贞 《Chinese Medical Journal》 SCIE CAS CSCD 2004年第1期140-142,共3页
关键词 measles virus·polymerase chain reaction·sequence analysis·genotype
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SWMM-based methodology for block-scale LID-BMPs planning based on site-scale multi-objective optimization: a case study in Tianjin 被引量:13
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作者 Te Xu Haifeng Jia +2 位作者 Zheng Wang Xuhui Mao Changqing Xu 《Frontiers of Environmental Science & Engineering》 SCIE EI CAS CSCD 2017年第4期51-62,共12页
Low impact development type of best management practices (LID-BMPs) aims to mitigate urban stormwater runoffand lessen pollutant loads in an economical and eco-friendly way and has become a global concern in modem u... Low impact development type of best management practices (LID-BMPs) aims to mitigate urban stormwater runoffand lessen pollutant loads in an economical and eco-friendly way and has become a global concern in modem urban stormwater management. A new methodology based on stormwater management model (SWMM) for block-scale LID-BMPs planning was developed. This method integrated LID-BMP chain layout optimization in site-scale parcels with scenario analysis in the entire block-scale urban area. Non-dominated sorting genetic algorithm (NSGA-II) was successfully coupled to SWMM through Python to complete the site-scale optimization process. Different LID scenarios of the research area were designed on the basis of the optimized LID-BMP chain layout. A multi-index evaluation that considered runoff quantity indices, pollutant loads, and construction costs simultaneously helped select the cost-effective scenario as the final planning scheme. A case study in Tianjin, China, was conducted to demonstrate the proposed methodology. Results showed that more than 75% control rate of total runoff volume, 22%-46% peak flow reduction efficiency, and more than 32% pollutant removal rate were achieved. The robustness analysis indicated that the selected final planning scheme was considerably robust with varied weight values. 展开更多
关键词 Stormwater management LID-BMPs planning SWMM LID-BMP chain NSGA-II Scenario analysis
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Difference in DNA sequences in SSU rDNA variable regions among pathogens isolated from different epidemic foci of visceral leishmaniasis in China
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作者 胡孝素 卜玲毅 +3 位作者 马莹 王雅静 敬保迁 易桃林 《Chinese Medical Journal》 SCIE CAS CSCD 2002年第10期17-19,143,共4页
To confirm the existence of point mutations in the SSU rDNA variable regions of 5 Leishmania donovani (L d ) isolates from different epidemic foci in China Methods Specific SSU rDNA fragments from nuclear DNA of 7... To confirm the existence of point mutations in the SSU rDNA variable regions of 5 Leishmania donovani (L d ) isolates from different epidemic foci in China Methods Specific SSU rDNA fragments from nuclear DNA of 7 Leishmania species/isolates were amplified by PCR and then cloned into pGEM R T Easy Vectors After that, the specific fragments were sequenced by an automated DNA sequencer Results Sequence analysis showed that the amplified DNA fragments of 7 Leishmania species/isolates were all 392 bp in length All 5 point mutations were located in two unique sequence blocks (UQ Ⅰ and UQ Ⅱ), and no insertions or deletions were found The identities of comparison of Leishmania in GeneBank were more than 98% Conclusion Five point mutations exist in the SSU rDNA variable region of 5 L d isolates from different epidemic foci of visceral leishmaniasis (VL) in China Sequence differences of the SSU rDNA variable region exist among L d isolates from different foci 展开更多
关键词 visceral leishmaniasis · Leishmania · point mutation · small subunit ribosomal DNA · polymerase chain reaction · cloning · sequence analysis · epidemic foci
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