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Dissertations / Theses on the topic 'Residue conservation'

Author: Grafiati

Published: 4 June 2021

Last updated: 1 February 2022

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1

Valdar, William Seth Jermy. "Residue conservation in the prediction of protein-protein interfaces." Thesis, University College London (University of London), 2001. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.246927.

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2

Livingstone, Craig David. "Pattern recognition and protein structure prediction from aligned amino acid sequences." Thesis, University of Oxford, 1995. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.297307.

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3

Kelton, Jessica Ann Price Andrew J. "Herbicide performance and weed seedbank dynamics as affected by high residue conservation agriculture systems." Auburn, Ala., 2009. http://hdl.handle.net/10415/1929.

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4

Jerrell, Scottie Lee. "Strip-Tillage Production Systems for Tobacco." Thesis, Virginia Tech, 2001. http://hdl.handle.net/10919/33132.

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Conservation tillage production systems for flue-cured tobacco (Nicotiana tabacum L.) have been studied for many years. Inadequate chemical weed control and lack of acceptable pesticide and fertilizer application resulted in consistently lower yields and inferior cured leaf quality. The development of new conservation tillage equipment, improved methods of fertilizer application, and new herbicides, have resulted in a renewed interest in conservation tillage labeled for tobacco. This research investigated management practices to address slow early season growth characteristic of strip-tilla

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5

Le, Roux Andries Abraham. "The effect of soil residue cover on medicago pasture establishment and production under conservation agricultural practices." Thesis, Stellenbosch : Stellenbosch University, 2015. http://hdl.handle.net/10019.1/97055.

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Thesis (MSc)--Stellenbosch University, 2015.<br>ENGLISH ABSTRACT: Annual medic pastures play an important role in conservation agriculture (CA) practices in the Western Cape, because of the beneficial role it plays in rotation systems and the fact that it can re-establish on its own. In the Overberg medic pastures are the main pasture short rotation crop, but farmers in recent years shifted away from including medics. This was due to unsuccessful re-establishment and a visible decrease in dry matter production. This trend started after CA practices were implemented for a few years. A field st

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6

Zheng, Baojuan. "Broad-scale Assessment of Crop Residue Management Using Multi-temporal Remote Sensing Imagery." Diss., Virginia Tech, 2012. http://hdl.handle.net/10919/19201.

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Tillage practices have changed dramatically during the past several decades as agricultural specialists have recognized the unfavorable environmental effects of mechanized tillage. Alternatively, conservation tillage management can mitigate adverse environmental impacts of tillage, such as soil and water degradation. Adoption of conservation tillage has continued to increase since its first introduction, which raises questions of when and where it is practiced. Spatial and temporal specifics of tillage practices form important dimensions for development of effective crop management practices a

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7

Dam, Rikke Friis. "Impacts of long term tillage and residue practices on selected soil properties." Thesis, McGill University, 2003. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=78344.

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A two year study was initiated in 2001 on a 2.4 ha site of mostly St. Amable loamy sand and shallow loamy sand at the Macdonald Campus Research Farm. This study sought to assess the effects of long term tillage and residue practices on soil physical properties and to relate these properties to their influence on total carbon, total nitrogen and soil microbial biomass-carbon. The site was set up as a factorial experiment with three tillage practices (no till---NT; reduced till---RT; and conventional till---CT) and two residue practices (with residue (grain corn), +R; without residue (sil

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8

Burgess, Magdalena S. E. "Crop residue decomposition and nitrogen dynamics in corn under three tillage systems." Thesis, McGill University, 2000. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=36879.

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Decomposition and N dynamics of grain-corn residues were investigated in a field study in southwestern Quebec, with particular reference to the roles of different plant parts (stems, leaves etc.) in determining overall residue mass loss and N content. A litterbag study was conducted, with surface and buried placements in plots under three tillage systems (no-till, reduced tillage, and conventional tillage, established five years before litterbag placement). Residue mass loss and N content were monitored over a two-year period. Separate data were obtained for leaves, stems, husks, and cobs. Net

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9

Lynch, Madalyn Josephine. "A Measurement of Conservation Agriculture’s Effect on Nitrogen and Carbon Mineralization Rates for Agricultural Recommendations in Haiti’s Central Plateau." Thesis, Virginia Tech, 2015. http://hdl.handle.net/10919/51620.

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Much of Haitian agriculture is characterized by subsistence farming systems on eroded and nutrient-poor soils. Implementation of Conservation Agriculture systems has proven effective at improving soil quality and crop yield in many areas of the world, including areas similar to those in Haiti. While most Haitian smallholder farmers are highly resource-limited and adoption of new technologies is limited, these farmers are known to adopt new crops and practices if benefits that outweigh risks are demonstrated. Cover crops that help provide soil cover and increase nutrient mineralization are o

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10

Benson, Gordon Brinkley. "Integration of High Residue/No-till and Farmscaping Systems in Organic Production of Broccoli." Thesis, Virginia Tech, 2006. http://hdl.handle.net/10919/32805.

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High-biomass cover cropping enhances marketable yields in organic production of vegetables, linked to the improvement of soil quality and weed control. Although, during transition from chemical to organic cover-cropping production, especially with no-till systems, reduction of nitrogen availability to the main crop and increase in weed and pest pressure may occur. In 2004-2005, summer and fall broccoli (Brassica oleraceae L. Botrytis Group) crops were grown in twin rows on permanent (controlled traffic) raised beds (185-cm wide). Before broccoli transplanting, high-biomass cover crops were g

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11

Spedding, Timothy Andrew. "Soil microbial dynamics in response to tillage and residue management in a maize cropping system." Thesis, McGill University, 2002. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=79133.

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The impact of tillage and residue management on soil microorganisms was studied over the maize (Zea mays L.) growing season in southwestern Quebec. Tillage and residue treatments were imposed on a sandy loam to loamy sand soil in fall 1991. Treatments consisted of no till, reduced tillage, and conventional tillage with crop residues either removed from (-R) or retained on (+R) experimental plots, laid out in a randomized complete block design. Soil microbial biomass carbon (SMB-C), soil microbial nitrogen (SMB-N) and phospholipid fatty acid (PLFA) concentrations were measured four times

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12

Mashingaidze, Nester. "Weed dynamics in low-input dryland smallholder conservation agriculture systems in semi-arid Zimbabwe." Thesis, University of Pretoria, 2013. http://hdl.handle.net/2263/24412.

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The reported requirement for a higher weeding effort due to increased weed infestations under conservation agriculture (CA) relative to conventional mouldboard plough tillage is perceived by both smallholder farmers and extension workers as the main limiting factor to the widespread adoption of CA by smallholder farmers in southern Africa. However, proponents of CA argue that weeds are only a problem under CA in the initial two years and decline afterwards resulting in reduced labour requirements for weeding under CA. They further posit that weeds are only major problem where minimum tillage (

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13

Chan, Pedro. "A computational investigation of solubility, functionality and the adaptation in subcellular compartments of proteins." Thesis, University of Manchester, 2011. https://www.research.manchester.ac.uk/portal/en/theses/a-computational-investigation-of-solubility-functionality-and-the-adaptation-in-subcellular-compartments-of-proteins(29ba40c2-0e8b-459a-803b-529da885289a).html.

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A cell is considered to be the smallest unit of life. It carries out a variety of biochemical reactions through the activities of proteins and protein enzymes. In order to perform functions, proteins must be in their native folded state together with the correct environmental conditions. A slight change in pH or temperature could cause disruption to the electrostatic interactions within the protein, thus leading to conformational change and the loss of activity. Studies have shown that solubility could be enhanced by increasing the number of charges on the protein surface. And from the studies

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14

Alskaf, Kamal. "Conservation agriculture for sustainable land use : the agronomic and environmental impacts of different tillage practices and plant residue retention : farmer uptake of reduced tillage in England." Thesis, University of Nottingham, 2018. http://eprints.nottingham.ac.uk/51902/.

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Conservation Agriculture (CA) has potential benefits to the soil, crop yield, and the environment including reducing runoff, enhancing water retention and preventing soil erosion, in addition to increasing soil carbon sequestration and reducing greenhouse gas (GHG) emissions. Although CA is widely adopted in some areas of the world, it is still not widely adopted by UK farmers. The first overall aim of this project was to investigate the effects of tillage practice and residue retention, on soil physical properties, crop yield and GHG emissions. For this purpose, a split-plot field experiment

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15

Graham, Michael William. "Evaluating the interactions of crop management, carbon cycling, and climate using Earth system modeling and remote sensing." Diss., Virginia Tech, 2019. http://hdl.handle.net/10919/102386.

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Crop management practices, such as soil tillage and crop residue management, are land management activities with potentially large impacts on carbon (C) cycling and climate at the global scale. Improvements in crop management practices, such as conservation tillage or 'no-till' (NT), have been proposed as climate change mitigation measures because such practices may alter C cycles through increased sequestration of soil C in agricultural soils. Despite their potential importance, regional to global scale data are lacking for many crop management practices, and few studies have evaluated the po

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16

Callum, Ian R. "Long-term effects of tillage and residues on selected soil quality parameters." Thesis, McGill University, 2001. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=31202.

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A two year study was initiated in 1999 at the Macdonald Campus Farm, on a 2.4 ha site consisting mainly of St-Amable sand to shallow loamy sand (Typic Endoaquent; Humic Gleysol). The site was planted to alfalfa ( Medicago sativa) prior to the establishment of the experimental design and has been planted to corn (Zea mays L.) since 1991. The experiment was set up as a randomized complete block design and consisted of three tillage levels (NT, no-till; RT, reduced tillage; and CT, conventional tillage) and two residue levels (-R, no residues; +R, with residues). This study was performed in order

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17

Penick, William Frazier. "Influence of Transplanter Modification and Previous Crop on the Production of No-Till Dark Tobacco." TopSCHOLAR®, 2013. http://digitalcommons.wku.edu/theses/1257.

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Dark tobacco (Nicotiana tabacum L.) has historically been produced usingconventional tillage practices. Soil is cultivated multiple times throughout a growing season leading to an increased incidence of soil erosion. No-till systems have been growing in popularity with the advent of new technology that has enabled the practice to be performed effectively and efficiently. With the recent expansion of no-till practices throughout the agricultural community, many crops have had success in producing comparable yields while reducing input costs and saving soil resources. For this experiment, a trad

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18

Illergård, Kristoffer, Anni Kauko, and Arne Elofsson. "Why are polar residues within the membrane core evolutionary conserved?" Stockholms universitet, Institutionen för biokemi och biofysik, 2011. http://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-68378.

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Here, we present a study of polar residues within the membrane core of alpha-helical membrane proteins. As expected, polar residues are less frequent in the membrane than expected. Further, most of these residues are buried within the interior of the protein and are only rarely exposed to lipids. However, the polar groups often border internal water filled cavities, even if the rest of the sidechain is buried. A survey of their functional roles in known structures showed that the polar residues are often directly involved in binding of small compounds, especially in channels and transporters,

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19

Purewal, Victoria Jane. "Novel detection and removal of hazardous biocide residues historically applied to herbaria." Thesis, University of Lincoln, 2012. http://eprints.lincoln.ac.uk/13573/.

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This research is concerned with the detection and removal of hazardous biocide residues from historic applications to herbarium collections. There are two main aims: • To develop a rapid, cost-effective and non-destructive screening method for identifying toxic residues on herbarium sheets; and • To establish the most suitable decontamination method for the removal of naphthalene from herbarium collections, maintaining the integrity of the specimen. The research outlines how the presence of fluorescent marks on specimen sheets throughout the herbarium, at Amgueddfa Cymru- National Museum Wales

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20

Ricchiuto, Mario. "Construction and analysis of compact residual discretizations for conservation laws on unstructured meshes." Doctoral thesis, Universite Libre de Bruxelles, 2005. http://hdl.handle.net/2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/211035.

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This thesis presents the construction, the analysis and the verication of compact residual discretizations for the solution of conservation laws on unstructured meshes. <p>The schemes considered belong to the class of residual distribution (RD) or fluctuation splitting (FS) schemes. <p>The methodology presented relies on three main elements: design of compact linear first-order stable schemes for linear hyperbolic PDEs, a positivity preserving procedure mapping stable first-order linear schemes onto nonlinear second-order schemes with non-oscillatory shock capturing capabilities, and a conserv

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21

Saini, Monika Van Santen Edzard. "Integration of cover crop residues, conservation tillage and herbicides for weed management in corn, cotton, peanut and tomato." Auburn, Ala, 2009. http://hdl.handle.net/10415/1882.

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22

Ricchiuto, Mario. "Contributions to the development of residual discretizations for hyperbolic conservation laws with application to shallow water flows." Habilitation à diriger des recherches, Université Sciences et Technologies - Bordeaux I, 2011. http://tel.archives-ouvertes.fr/tel-00651688.

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In this work we review 12 years of developments in the field of residual based discretizations for hyperbolic problems and their application to the solution of the shallow water equations. Fundamental concepts related to the topic are recalled and he construction of second and higher order schemes for steady problems is presented. The generalization to time dependent problems by means of multi-step implicit time integration, space-time, and genuinely explicit techniques is thoroughly discussed. Finally, the issues of C-property, super consistency, and wetting/drying are analyzed in this framew

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23

Zimmerman, Kathryn. "Sustaining biological diversity in managed sub-boreal spruce landscapes residual habitat strategies for cavity nesting species /." Connect to this title online, 1998. http://www.nlc-bnc.ca/obj/s4/f2/dsk2/ftp03/MQ62505.pdf.

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24

Haboub, Ahmad. "Essays on equity valuation and accounting conservatism for insurance companies." Thesis, Brunel University, 2017. http://bura.brunel.ac.uk/handle/2438/15823.

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This thesis contributes to the literature in the finance and accounting field throughout its three empirical chapters. The first empirical chapter contributes to the literature on accounting conservatism in several ways; first, it investigates the accounting conservatism of US insurance companies using four measures, namely, non-operating accruals, skewness of earnings and cash flows, book to market ratio and asymmetric timeliness measures. Second, this paper compares these four measures in order to determine the association and differences between them. Finally, the level of accounting conser

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25

Ibrahim, Houssam. "Implantation cochléaire sur audition résiduelle : conservation des structures anatomiques neurosensorielles." Thesis, Lyon 1, 2011. http://www.theses.fr/2011LYO10244.

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La surdité de perception est généralement la conséquence de la mort des cellules ciliées et de la dégénérescence supplémentaire des innervations afférentes induite par une absence de stimulation. Les indications de l’implant cochléaire se sont élargies en direction des patients sourds qui présentent un reliquat d’audition exploitable dans les fréquences graves. La persistance d’un reliquat auditif suffisant après l’intervention permet parfois une stimulation électrique acoustique, amplifiée acoustique sur les fréquences graves préservées, et électrique sur les fréquences aiguës. Actuellement,

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Ranaivoson, Lalaina. "Etude des fonctions agro-écologiques des principes de l'agriculture de conservation dans l'amélioration de la production du riz pluviale dans la région du lac Alaotra (Madagascar)." Thesis, Montpellier, SupAgro, 2017. http://www.theses.fr/2017NSAM0043/document.

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L’Agriculture de conservation (AC) repose sur trois principes: le minimum de travail du sol, la couverture permanente du sol et la diversification des espèces cultivées. Elle a été introduite vers la fin des années 90 dans la région du lac Alaotra, Madagascar, dans l’objectif d’augmenter la productivisté de l’agriculture pluviale qui, généralement, pâtit des problèmes liés à la faible fertilité des sols, aux contraintes hydriques et à l’enherbement. L’objectif principal de la thèse consiste à quantifier et caractériser les impacts des fonctions agro-écologiques de l’AC dans l’amélioration du r

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27

PINCHE, CATHERINE. "Mise au point d'une methode de dosage differentiel par chimiluminescence des derives oxygenes de l'azote dans les produits de charcuterie et salaisons. Etude de l'incidence des modalites de fabrication et de conservation sur les taux residuels de nitrite et des derives nitroses." Clermont-Ferrand 2, 1990. http://www.theses.fr/1990CLF21149.

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Utilise a faible dose en raison de sa toxicite propre, l'ion nitrite (no#2#) est, avec son precurseur l'ion nitrate (no#3#), l'un des additifs les plus courants des produits de charcuterie et salaisons. Il le doit, tout d'abord, a ses proprietes inhibitrices sur la croissance du bacille botulique, mais aussi a son action sur la couleur. (nitrosomyoglobine) et sur la flaveur des produits carnes, par l'intermediaire de nombreux derives s, n ou c-nitroses qu'il engendre. Outre les interferences d'ordre chimique auxquelles peut etre confrontee la reaction de diazotation (griess), qui est a la base

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28

Ramsamy, Priscilla. "Modélisation de la morphodynamique sédimentaire par une méthode distribuant le résidu." Thesis, Antilles, 2017. http://www.theses.fr/2017ANTI0206/document.

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Ce travail de thèse, propose un schéma numérique d'ordre élevé, distribuantle résidu (RD) pour l'approximation d'un problème hydro-sédimentairehyperbolique non conservatif, couplant les modèles de Grass et de Saint-Venant. Il fait appel à des méthodes de Runge-Kutta à variation totale diminuanteet de stabilisation (méthode de décentrement amont, dit Upwind),avec ou sans adjonction de limiteurs et présente de bonnes propriétés.L'une des facettes importantes de ce qui a été réalisée, repose sur la conceptionet le développement d'un programme Python 2D-espace, sous la formed'un logiciel faisant a

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Larat, Adam. "Conception et Analyse de Schémas Distribuant le Résidu d'Ordre Très Élevé. Application à la Mécanique des Fluides." Phd thesis, Université Sciences et Technologies - Bordeaux I, 2009. http://tel.archives-ouvertes.fr/tel-00502429.

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La simulation numérique est aujourd'hui un outils majeur dans la conception des objets aérodynamiques, que ce soit dans l'aéronautique, l'automobile, l'industrie navale, etc... Un des défis majeurs pour repousser les limites des codes de simulation est d'améliorer leur précision, tout en utilisant une quantité fixe de ressources (puissance et/ou temps de calcul). Cet objectif peut être atteint par deux approches différentes, soit en construisant une discrétisation fournissant sur un maillage donné une solution d'ordre très élevé, soit en construisant un schéma compact et massivement parallélis

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30

Wilson, Andrew S., N. Tuross, and M. J. Wachowiak. "Blood Residues on Archaeological Objects - A Conservation Perspective." 1996. http://hdl.handle.net/10454/10973.

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31

Chen, Ya-Ping, and 陳雅萍. "Analyzing the Impacts of Sequence Conservation on Protein RNA-binding Residue Prediction." Thesis, 2011. http://ndltd.ncl.edu.tw/handle/21582511879129142405.

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碩士<br>國立臺灣大學<br>工程科學及海洋工程學研究所<br>99<br>Protein-RNA interactions play a vital role in many stages of gene expression such as pre-mRNA synthesis, mRNA splicing and translation. It is generally believed that binding domains or binding motifs enable RNA-binding proteins to recognize their target RNA. Since the corresponding nucleic acid type and the structure level recognized can be quite diverse, predicting RNA-binding residues from primary structure of proteins is indeed a challenging task. In this thesis, we continue the work of ProteRNA and develop two classifiers, namely support vector ma

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Liu, Jen-Wei, and 劉人維. "Comprehensive Analysis of Residue Structural Environments, Conservation and Their Applications in Proteins." Thesis, 2017. http://ndltd.ncl.edu.tw/handle/x69dq9.

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博士<br>國立交通大學<br>生物資訊及系統生物研究所<br>105<br>Functionally or structurally important residues such as catalytic sites in a protein are usually evolutionary conserved. To identify these conserved residues, a set of homolog sequences are generally used to calculate sequence conservation scores. Interestingly, the sequence conservation scores were found to be highly correlated with residue structural environments in a protein structure. Therefore, we could estimate evolutionary information from a single protein structure even without information from homolog proteins. In 2008, our lab proposed a residue

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Huang, Yu-Wen, and 黃郁文. "On the relationship between structural packing and residue conservation in protein-protein interfaces." Thesis, 2017. http://ndltd.ncl.edu.tw/handle/h5q83x.

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博士<br>國立交通大學<br>生物資訊及系統生物研究所<br>105<br>Proteins interact with other proteins to perform their biological functions. Thus, the knowledge of protein-protein interfaces is valuable in understanding molecular mechanisms. Recently, we have observed that structural packing profiles of proteins have moderate correlations with their corresponding conservation profiles. However, some proteins were found to have low correlations between these two profiles, where structural packing profiles of the proteins were computed using a weighted contact number (WCN) model with the structures of single proteins. T

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Lin, Yu-Feng, and 林玉鳳. "On the relationship between protein structures, packing density, and residue conservation of protein domains." Thesis, 2017. http://ndltd.ncl.edu.tw/handle/3f7uch.

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博士<br>國立交通大學<br>生物資訊及系統生物研究所<br>105<br>During evolution, substitutions at individual residues within amino acid sequences arise under the constraints of structure folding, protein function, and the protein–protein interactions. Amino acid sequences generally fold into unique, stable, and well-ordered conformations so that the resulting proteins can carry out their specific functions. As such, residues that are important for function and structural stabilization are generally highly conserved in terms of both sequence and structure. Recent studies have discussed the structural constraints impar

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Cheng, Chih-Wen, and 鄭智文. "The relationship between the free space and the conservation of residues in a protein." Thesis, 2015. http://ndltd.ncl.edu.tw/handle/83823746721434549107.

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碩士<br>國立交通大學<br>生物資訊及系統生物研究所<br>103<br>蛋白質序列中序列保留性高的氨基酸常常在功能上或結構上是重要的. 每個氨基酸在序列保留的程度上通常會受到它們的本身的物理性質所影響. 其中一個性質是緊湊的蛋白質結構中的自由空間. 在這次的研究中, 我們提出一個基於Voronoi體積的方法來量化氨基酸周圍的自由空間, 名叫Relative Space of Voronoi (RSV). 根據計算序列保留度和結構特性的相關係數, 結果顯示沿著序列上的氨基酸其序列保留度上的變化和RSV有很好的相關性. 我們的結果提出另一種方式來研究序列保留度和結構特性之間的關係.

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Chwialkowski, Natalia Ewa. "Novel approaches in determining baseline information on annual disposal rates and trace element content of U.S. coal combustion residues : a response to EPA’s June 2010 proposed disposal rule." Thesis, 2010. http://hdl.handle.net/2152/ETD-UT-2010-12-2386.

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Although products of coal combustion (PCCs) such as coal ash are currently exempted from classification as a hazardous waste in the United States under the 1976 Resource Conservation and Recovery Act (RCRA), the U.S. Environmental Protection Agency (EPA) is now revising a proposed rule to modify disposal practices for these materials in order to prevent contamination of ground- and surface water sources by leached trace elements. This paper analyzes several aspects of EPA’s scientific reasoning for instating the rule, with the intent of answering the following questions: 1) Are EPA’s cited va

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