304 results on '"SCOP"'
Search Results
2. Using Auto-Encoders to Create Encodings for Three-Dimensional Protein Structure Information
- Author
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Kohut, Angela M., Kremer, Stefan C., and Graether, Steffen P.
- Published
- 2024
- Full Text
- View/download PDF
3. Theoretical investigation of electron interaction processes for furfural (C5H4O2) and p-benzoquinone (C6H4O2).
- Author
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Chauhan, Dhaval, Parikh, Smruti, Thakkar, Nirav, and Limbachiya, Chetan
- Subjects
- *
PERMITTIVITY , *MANUFACTURING processes , *MOLECULES , *ELECTRONS , *FURFURAL - Abstract
The present study aims to quantify the electron-induced inelastic and elastic processes for molecules of industrial relevance, furfural and p-benzoquinone. We have computed inelastic cross-sections (Qinel), elastic cross-sections (Qel) and total cross-sections (QT) through spherical complex optical potential (SCOP) formalism, from ionisation energy (IE) to 5000 eV. The continuum and discrete contributions of the Qinel have been calculated in terms of ionisation (Qion) and excitation (∑Qexc) cross-sections, respectively, by employing the complex scattering potential-ionisation contribution (CSP-iC) method. A novel 2-parameter semi-empirical method (2p-SEM), a useful approach applicable for the large molecules 55 < Z < 95 for calculating QT, has been proposed and validated. Computed results are compared with previous experimental and theoretical data. We have also estimated the dielectric constant (ε) using various methods and correlations with molecular ionisation for these applied molecules. [ABSTRACT FROM AUTHOR]
- Published
- 2024
- Full Text
- View/download PDF
4. Theoretical investigation of electron interaction processes for furfural (C5H4O2) and p-benzoquinone (C6H4O2).
- Author
-
Chauhan, Dhaval, Parikh, Smruti, Thakkar, Nirav, and Limbachiya, Chetan
- Subjects
PERMITTIVITY ,MANUFACTURING processes ,MOLECULES ,ELECTRONS ,FURFURAL - Abstract
The present study aims to quantify the electron-induced inelastic and elastic processes for molecules of industrial relevance, furfural and p-benzoquinone. We have computed inelastic cross-sections (Q
inel ), elastic cross-sections (Qel ) and total cross-sections (QT ) through spherical complex optical potential (SCOP) formalism, from ionisation energy (IE) to 5000 eV. The continuum and discrete contributions of the Qinel have been calculated in terms of ionisation (Qion ) and excitation (∑Qexc ) cross-sections, respectively, by employing the complex scattering potential-ionisation contribution (CSP-iC) method. A novel 2-parameter semi-empirical method (2p-SEM), a useful approach applicable for the large molecules 55 < Z < 95 for calculating QT, has been proposed and validated. Computed results are compared with previous experimental and theoretical data. We have also estimated the dielectric constant (ε) using various methods and correlations with molecular ionisation for these applied molecules. [ABSTRACT FROM AUTHOR]- Published
- 2024
- Full Text
- View/download PDF
5. Exercitarea profesiei de medic, recunoașterea titlurilor profesionale și salarizarea personalului medical.
- Author
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MUSCALU, Loredana Manuela and RĂDESCU, Gabriela
- Abstract
Copyright of Revista Româna de Dreptul Muncii is the property of Wolters Kluwer Romania and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
- Published
- 2024
6. Air-source heat pump (ASHP) under very climate change scenarios: a numerical analysis
- Author
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Cristina Baglivo, Domenico Mazzeo, Nicoletta Matera, and Paolo Maria Congedo
- Subjects
air-cooled heat pump ,climate change ,scop ,seer ,energy consumption ,cold climate ,hot climate ,Technology ,Economic growth, development, planning ,HD72-88 - Abstract
Air-source heat pumps are strongly influenced by outdoor conditions, it is expected that ongoing climate changes may impact their operation. This paper presents a predictive analysis of the behaviour of air-source heat pumps in two cities with extremely cold and warm climates in the short, medium, and long term. The seasonal coefficient of performance and heat pump seasonal energy efficiency index are evaluated over the years, considering climate change for both locations. Climate change will shorten the winter period and prolong the summer. In winter, this results in a slight softening of the seasonal coefficient of performance and a reduction in operating hours. In summer, there is a slight increase in seasonal energy efficiency ratio values and hours of operation. The work highlights how the performance of the air-source heat pump, on average, will improve in winter due to an average increase in temperature. Heat pumps are expected to be used in the future and in geographical areas where they are not currently used due to the extreme winter temperatures.
- Published
- 2023
- Full Text
- View/download PDF
7. Le succès des reprises d’entreprise en SCOP : l’influence des modes de constitution et des caractéristiques des équipes de reprise.
- Author
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Thévenard-Puthod, Catherine, Dubouloz, Sandra, and Favre, Cédric
- Abstract
Copyright of Revue Internationale PME is the property of Institue de Recherche sur les PME and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
- Published
- 2024
- Full Text
- View/download PDF
8. Air-source Heat Pump Under Very Climate Change Scenarios: A Numerical Analysis.
- Author
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Baglivo, Cristina, Mazzeo, Domenico, Matera, Nicoletta, and Congedo, Paolo Maria
- Subjects
AIR source heat pump systems ,NUMERICAL analysis ,HEAT pumps ,GLOBAL warming ,BEHAVIORAL assessment - Abstract
Air-source heat pumps are strongly influenced by outdoor conditions, it is expected that ongoing climate changes may impact their operation. This paper presents a predictive analysis of the behaviour of air-source heat pumps in two cities with extremely cold and warm climates in the short, medium, and long term. The seasonal coefficient of performance and heat pump seasonal energy efficiency index are evaluated over the years, considering climate change for both locations. Climate change will shorten the winter period and prolong the summer. In winter, this results in a slight softening of the seasonal coefficient of performance and a reduction in operating hours. In summer, there is a slight increase in seasonal energy efficiency ratio values and hours of operation. The work highlights how the performance of the air-source heat pump, on average, will improve in winter due to an average increase in temperature. Heat pumps are expected to be used in the future and in geographical areas where they are not currently used due to the extreme winter temperatures. [ABSTRACT FROM AUTHOR]
- Published
- 2023
- Full Text
- View/download PDF
9. Reshaping the Anglo-Saxon Scop: Truth Manipulation and Personal Gain in Modern Retellings of Beowulf.
- Author
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Marmora, Giuliano
- Subjects
INTERTEXTUALITY ,INTERTEXTUAL analysis ,FORGERS ,MEDIEVALISM ,EMPLOYMENT ,NARRATIVES - Abstract
This article identifies two frequently occurring motifs in novelistic adaptations of Beowulf that compellingly corroborate the fictional subversion of the narrative: the scop as the forger of the truth and personal profit as the catalyst for composition. Moreover, this article observes how these novels exist within a complex intertextual network, demonstrating how contemporary authors artfully recast Old English literary texts into their work and suggesting the influence of earlier retellings for the employment of either one or both motifs. [ABSTRACT FROM AUTHOR]
- Published
- 2023
- Full Text
- View/download PDF
10. Vinovăţia, motivul și scopul infracţiunilor de manipulare a unui eveniment sportiv și de pariuri aranjate
- Author
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Gheorghe RENIŢĂ
- Subjects
scop ,motiv ,vinovăţie ,manipulare ,eveniment ,pariuri aranjate ,interes material ,Law ,Law in general. Comparative and uniform law. Jurisprudence ,K1-7720 - Abstract
Acest articol analizează vinovăţia, motivul și scopul infracţiunilor de manipulare a unui eveniment și de pariuri aranjate. În acest sens, s-a apelat la prevederile normative, la practica judiciară, precum și la doctrina juridică relevantă. S-a constatat că fără vinovăţie nu există infracţiune, iar fără infracţiune nu poate fi aplicată răspunderea penală. De asemenea, s-a reţinut motivul răspunderii la întrebarea de ce persoana comite o infracţiune. În contrast, s-a stabilit că scopul răspunde la întrebarea ce urmărește persoana prin comiterea unei infracţiuni. În cele din urmă, s-au formulat o serie de recomandări, apte să îmbunătăţească cadrul normativ în materie.
- Published
- 2022
- Full Text
- View/download PDF
11. SIMBIOZA PROFESOR-ELEV PROMOTOR ÎN ATINGEREA PERFORMANȚEI.
- Author
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MIRCESCU, Georgiana Iudita
- Subjects
SOCIOCULTURAL factors ,STUDENT activities ,EXCHANGE of persons programs ,ACCESS to information ,ALCHEMY ,STUDENT engagement ,ACHIEVEMENT ,PETITIONS - Abstract
Copyright of REVART: Specialized Review of Theory & Critique of Arts is the property of EDITURA Eurostampa and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
- Published
- 2023
12. Seasonal Efficiency of a Brine-to-Water Heat Pump with Different Control Options according to Ecodesign Standards
- Author
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Jaime Sieres, Ignacio Ortega, Fernando Cerdeira, Estrella Álvarez, and José M. Santos
- Subjects
heat pump ,seasonal efficiency ,SCOP ,R410A ,experimental results ,ecodesign ,Environmental technology. Sanitary engineering ,TD1-1066 ,Environmental engineering ,TA170-171 - Abstract
The seasonal performance of a heat pump indicates its average performance during the heating and/or cooling season, taking into account the different energy demands and their variability over time. Several European and international regulations and policies related with energy efficiency and the reduction of the carbon footprint of energy related products are affecting the heat pump industry. Among them, the ecodesign regulations impose minimum energy efficiency values for heat pumps, efficiencies that are based on the seasonal coefficient of performance. This work is focused on a domestic brine-to-water heat pump for low-temperature applications. The methodology to determine its seasonal coefficient of performance (SCOP) according to the European standard EN 14825 is explained and evaluated based on experimental results. The impact on the SCOP of using some technology options such as fixed or variable speed compressors, and fixed or variable outlet temperature operation is evaluated. Results show that between the lowest and highest efficient option, the SCOP can be improved by 26%.
- Published
- 2022
- Full Text
- View/download PDF
13. ENERGY AND HOME COMFORT.
- Author
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CIOBAN, Costel-Ioan
- Subjects
- *
HEAT pumps , *ECONOMIC efficiency , *ENERGY consumption , *HEAT transfer , *HEATING - Abstract
In this paper we aim to make a comparison between three types of heat pumps: air-to-water, water-to-water, ground-to-water. We show that, from a construction point of view, the difference between the three types of heat pumps is the source from which the additional heat is extracted. We point out that the heat pump is the installation that transfers heat from a colder medium to a warmer medium. Most often, pumps extract heat from water, air or ground/geothermal sources and transfer it into the home via underfloor heating, radiators, etc. Any decision to install heat pump equipment must be carefully considered, taking into account all four elements (energy consumption, installation costs, existence of the chosen heat source and its accessibility) that influence the technical and economic efficiency and the proper functioning of the equipment. [ABSTRACT FROM AUTHOR]
- Published
- 2023
14. Databases of Protein Families and Superfamilies
- Author
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Birwal, Ravisha, Kajal, Kaur, Loveleen, Goyal, Rekha, Singh, Harpreet, and Kaur, Dilpreet
- Published
- 2017
- Full Text
- View/download PDF
15. Potential of CO 2 Emission Reduction via Application of Geothermal Heat Exchanger and Passive Cooling in Residential Sector under Polish Climatic Conditions.
- Author
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Fidorów-Kaprawy, Natalia and Stefaniak, Łukasz
- Subjects
- *
GROUND source heat pump systems , *CARBON emissions , *HEAT exchangers , *GREENHOUSE gas mitigation , *HEAT storage , *GLOBAL cooling - Abstract
The article summarizes the results of the 25-year time horizon performance analysis of the ground source heat pump that serves as a heat source in a detached house in the climatic conditions that prevail in Wrocław, Poland. The main aim is to assess the potential of ground regeneration and reduction of CO2 emission by passive cooling application. The study adds value to similar research conducted worldwide for various conditions. The behavior of the lower source of the heat pump was simulated using EED software. The ground and borehole properties, heat pump characteristics, heating and cooling load, as well as the energy demand for domestic hot water preparation have been used as input data. Based on the brine temperatures for all analyzed cases including the ground with lower and higher values of conductivity and heat capacity, the borehole filler of inferior and superior thermal properties, and the passive cooling option turned on and off, the seasonal efficiencies of the heat pump have been calculated. The energy and emission savings calculations are based on the values obtained. The application of passive cooling reduces the brine temperature drop by 0.5 K to over 1.0 K in consecutive years in the analyzed cases and the thermal imbalance by 65.0% to 65.9%. Electric energy savings for heating and domestic hot water preparation reach 4.5%, but the greatest advantage of the system is the possibility of almost emission-free colling the living spaces which allows reducing around 33.7 GWh of electric energy and 1186–1830 kg of CO2 emission for cooling. [ABSTRACT FROM AUTHOR]
- Published
- 2022
- Full Text
- View/download PDF
16. Effects of Scoparone on differentiation, adhesion, migration, autophagy and mineralization through the osteogenic signalling pathways.
- Author
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Park, Kyung‐Ran, Kim, Bomi, Lee, Joon Yeop, Moon, Ho‐Jin, Kwon, Il Keun, and Yun, Hyung‐Mun
- Subjects
RUNX proteins ,BONE morphogenetic proteins ,CELLULAR signal transduction ,AUTOPHAGY ,ALKALINE phosphatase ,ADHESION ,OSTEOINDUCTION ,PEPTIDASE - Abstract
Scoparone (SCOP), an active and efficient coumarin compound derived from Artemisia capillaris Thunb, has been used as a traditional Chinese herbal medicine. Herein, we investigated the effects of SCOP on the osteogenic processes using MC3T3‐E1 pre‐osteoblasts in in vitro cell systems. SCOP (C11H10O4, > 99.17%) was purified and identified from A. capillaries. SCOP (0.1 to 100 μM concentrations) did not have cytotoxic effects in pre‐osteoblasts; however, it promoted alkaline phosphatase (ALP) staining and activity, and mineralized nodule formation under early and late osteogenic induction. SCOP elevated osteogenic signals through the bone morphogenetic protein 2 (BMP2)‐Smad1/5/8 pathway, leading to the increased expression of runt‐related transcription factor 2 (RUNX2) with its target protein, matrix metallopeptidase 13 (MMP13). SCOP also induced the non‐canonical BMP2‐MAPKs pathway, but not the Wnt3a‐β‐catenin pathway. Moreover, SCOP promoted autophagy, migration and adhesion under the osteogenic induction. Overall, the findings of this study demonstrated that SCOP has osteogenic effects associated with cell differentiation, adhesion, migration, autophagy and mineralization. [ABSTRACT FROM AUTHOR]
- Published
- 2022
- Full Text
- View/download PDF
17. LOCUŢIUNEA PREPOZIŢIONALĂ ÎN SEMN DE ÎNTRE CALITATE, CAUZALITATE ŞI FINALITATE.
- Author
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CHIRCU, ADRIAN
- Subjects
STANDARD language ,ROMANIAN language ,TERMS & phrases ,ROMANIANS ,SYNCHRONIC order - Abstract
In hisstudy, the authoraims at a careful analysis of the syntactic implications of the phrase în semn de ‘as a sign of’ which has certainly been used in the past and which is also frequently used nowadays in the standard language. In Old Romanian, the phrase în semn de ‘as a sign of’ has not been used frequently, yet the several occurrences which were identified help us understand its meanings and functional roles at sentence level. From a semantic perspective, the phrase evinces multiple variations, which may express quality, cause and scope. The analysis performed by the authoris consequently aimed at comprehending complex syntactic structures which are built with the help of the prepositional phrase in question. [ABSTRACT FROM AUTHOR]
- Published
- 2022
18. Seasonal Efficiency of a Brine-to-Water Heat Pump with Different Control Options according to Ecodesign Standards.
- Author
-
Sieres, Jaime, Ortega, Ignacio, Cerdeira, Fernando, Álvarez, Estrella, and Santos, José M.
- Subjects
HEAT pump efficiency ,HEAT pumps ,SEASONS ,ENERGY consumption ,ECOLOGICAL impact - Abstract
The seasonal performance of a heat pump indicates its average performance during the heating and/or cooling season, taking into account the different energy demands and their variability over time. Several European and international regulations and policies related with energy efficiency and the reduction of the carbon footprint of energy related products are affecting the heat pump industry. Among them, the ecodesign regulations impose minimum energy efficiency values for heat pumps, efficiencies that are based on the seasonal coefficient of performance. This work is focused on a domestic brine-to-water heat pump for low-temperature applications. The methodology to determine its seasonal coefficient of performance (SCOP) according to the European standard EN 14825 is explained and evaluated based on experimental results. The impact on the SCOP of using some technology options such as fixed or variable speed compressors, and fixed or variable outlet temperature operation is evaluated. Results show that between the lowest and highest efficient option, the SCOP can be improved by 26%. [ABSTRACT FROM AUTHOR]
- Published
- 2022
- Full Text
- View/download PDF
19. Design of a circular supply chain for electricity grid components: A Stedin case study
- Author
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Martens, Yoeri (author) and Martens, Yoeri (author)
- Abstract
In light of the energy transition and resulting electrification of the energy systems in the Netherlands, Distribution System Operators (DSOs) need to rapidly expand their operations to facilitate consumers. At the same time, their own activities need to become more sustainable as well. One of the important methods for this is integrating the principles of the circular economy in their supply chains (SCs). This study focuses on designing a circular supply chain (CSC) for the redeployment and recycling of components from the electricity grid. It combines two CSC design methods, the SCOP method and the CSC guiding framework, with the Evolved Double Diamond to guide the design process. Throughout the entire design project other methods are used to generate input or boundaries for the design like qualitative workshops, data analysis, brainstorming and MCDA techniques for evaluation. As a case study a design project is done for the Dutch DSO Stedin which allows to develop a concrete design, identify key remaining design decisions and develop an elaboration and evaluation framework to guide Stedin in CSC design decision making. In this case study, the focus is on cables and transformers for all voltage levels as these assets are most important in reaching the sustainability targets of Stedin. The combination of the design methods was helpful in structuring and inspiring the CSC design process but lacks more detailed steps a designer should take. The use of the MCDA in design component decision making instead of alternative evaluation does seem a new and useful technique in CSC design but needs further development., Transport, Infrastructure and Logistics
- Published
- 2024
20. Latura subiectivă a infracţiunilor de neglijenţă în serviciu (ART. 329 CP RM)
- Author
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Adrian POPENCO
- Subjects
neglijenţă în serviciu ,imprudenţă ,latură subiectivă ,caz fortuit ,factor intelectiv ,factor volitiv ,motiv ,scop ,concurenţa normelor ,Law ,Law in general. Comparative and uniform law. Jurisprudence ,K1-7720 - Abstract
Studiul efectuat are drept scop stabilirea conţinutului laturii subiective a infracţiunilor de neglijenţă în serviciu (art.329 CP RM). Se încearcă efectuarea unei delimitări clare între neglijenţa în serviciu şi fapta săvârşită de persoana publică în procesul îndeplinirii atribuţiilor de serviciu, dar comisă fără vinovăţie. O parte din studiu este destinată relevării semnelor secundare ale laturii subiective ale infracţiunilor de neglijenţă în serviciu. Se arată că motivul infracţiunii nu constituie semn obligatoriu al faptelor penale consemnate de art.329 CP RM, fiind, însă, prezent în conţinutul respectivelor componenţe de infracţiune. În acelaşi timp, se punctează că scopul infracţiunii nu este prezent, în niciun mod, în structura laturii subiective a infracţiunilor prevăzute de art.329 CP RM, nici pe post de semn facultativ, întrucât este incompatibil cu infracţiunile săvârşite din imprudenţă.
- Published
- 2020
- Full Text
- View/download PDF
21. Decision Tree Classifier for Classification of Proteins Using the Protein Data Bank
- Author
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Satpute, Babasaheb S., Yadav, Raghav, Kacprzyk, Janusz, Series Editor, Krishna, A.N., editor, Srikantaiah, K.C., editor, and Naveena, C, editor
- Published
- 2019
- Full Text
- View/download PDF
22. Classification of Proteins Using Naïve Bayes Classifier and Surface-Invariant Coordinates
- Author
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Satpute, Babasaheb S., Yadav, Raghav, Kacprzyk, Janusz, Series Editor, Krishna, A.N., editor, Srikantaiah, K.C., editor, and Naveena, C, editor
- Published
- 2019
- Full Text
- View/download PDF
23. An Efficient Machine Learning Technique for Protein Classification Using Probabilistic Approach
- Author
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Satpute, Babasaheb S., Yadav, Raghav, Kacprzyk, Janusz, Series Editor, Pal, Nikhil R., Advisory Editor, Bello Perez, Rafael, Advisory Editor, Corchado, Emilio S., Advisory Editor, Hagras, Hani, Advisory Editor, Kóczy, László T., Advisory Editor, Kreinovich, Vladik, Advisory Editor, Lin, Chin-Teng, Advisory Editor, Lu, Jie, Advisory Editor, Melin, Patricia, Advisory Editor, Nedjah, Nadia, Advisory Editor, Nguyen, Ngoc Thanh, Advisory Editor, Wang, Jun, Advisory Editor, Kulkarni, Anand J., editor, Satapathy, Suresh Chandra, editor, Kang, Tai, editor, and Kashan, Ali Husseinzadeh, editor
- Published
- 2019
- Full Text
- View/download PDF
24. A Hierarchical and Scalable Strategy for Protein Structural Classification
- Author
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Mendes, Vinício F., Monteiro, Cleiton R., Comarela, Giovanni V., Silveira, Sabrina A., Hutchison, David, Editorial Board Member, Kanade, Takeo, Editorial Board Member, Kittler, Josef, Editorial Board Member, Kleinberg, Jon M., Editorial Board Member, Mattern, Friedemann, Editorial Board Member, Mitchell, John C., Editorial Board Member, Naor, Moni, Editorial Board Member, Pandu Rangan, C., Editorial Board Member, Steffen, Bernhard, Editorial Board Member, Terzopoulos, Demetri, Editorial Board Member, Tygar, Doug, Editorial Board Member, Goos, Gerhard, Founding Editor, Hartmanis, Juris, Founding Editor, Rojas, Ignacio, editor, Valenzuela, Olga, editor, Rojas, Fernando, editor, and Ortuño, Francisco, editor
- Published
- 2019
- Full Text
- View/download PDF
25. Electron Induced Chemistry of Chlorobenzene
- Author
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Prajapati, Dineshkumar, Yadav, Hitesh, Vinodkumar, Minaxi, Vinodkumar, P. C., Limbachiya, Chetan, Deshmukh, P. C., editor, Krishnakumar, E., editor, Fritzsche, Stephan, editor, Krishnamurthy, M., editor, and Majumder, Sonjoy, editor
- Published
- 2019
- Full Text
- View/download PDF
26. Biological 3D Structural Databases
- Author
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Gaber, Yasser, Rashad, Boshra, Fathy, Eman, Shaik, Noor Ahmad, editor, Hakeem, Khalid Rehman, editor, Banaganapalli, Babajan, editor, and Elango, Ramu, editor
- Published
- 2019
- Full Text
- View/download PDF
27. The value of protein structure classification information—Surveying the scientific literature
- Author
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Fox, Naomi K, Brenner, Steven E, and Chandonia, John‐Marc
- Subjects
Biological Sciences ,Bioinformatics and Computational Biology ,1.5 Resources and infrastructure (underpinning) ,Algorithms ,Computational Biology ,Databases ,Protein ,Protein Conformation ,Proteins ,SCOP ,CATH ,database ,curation ,resources ,Mathematical Sciences ,Information and Computing Sciences ,Bioinformatics ,Biological sciences ,Mathematical sciences - Abstract
The Structural Classification of Proteins (SCOP) and Class, Architecture, Topology, Homology (CATH) databases have been valuable resources for protein structure classification for over 20 years. Development of SCOP (version 1) concluded in June 2009 with SCOP 1.75. The SCOPe (SCOP-extended) database offers continued development of the classic SCOP hierarchy, adding over 33,000 structures. We have attempted to assess the impact of these two decade old resources and guide future development. To this end, we surveyed recent articles to learn how structure classification data are used. Of 571 articles published in 2012-2013 that cite SCOP, 439 actually use data from the resource. We found that the type of use was fairly evenly distributed among four top categories: A) study protein structure or evolution (27% of articles), B) train and/or benchmark algorithms (28% of articles), C) augment non-SCOP datasets with SCOP classification (21% of articles), and D) examine the classification of one protein/a small set of proteins (22% of articles). Most articles described computational research, although 11% described purely experimental research, and a further 9% included both. We examined how CATH and SCOP were used in 158 articles that cited both databases: while some studies used only one dataset, the majority used data from both resources. Protein structure classification remains highly relevant for a diverse range of problems and settings.
- Published
- 2015
28. Automatic Classification of Protein Structure Using the Maximum Contact Map Overlap Metric
- Author
-
Wohlers, Inken [Univ. of Duisburg-Essen, Essen (Germany). Genome Informatics; Univ. of Lubeck (Germany). Inst. of Neurogenetics and for Integrative and Experimental Genomics. Platform for Genome Analytics]
- Published
- 2015
- Full Text
- View/download PDF
29. The value of protein structure classification information-Surveying the scientific literature
- Author
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Chandonia, John [Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)]
- Published
- 2015
- Full Text
- View/download PDF
30. Electron impact scattering from pentane molecules and effect of isomerism on cross section
- Author
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Himani Tomer, Paresh Modak, Nidhi Sinha, and Bobby Antony
- Subjects
Electron scattering ,Elastic cross section ,Inelastic cross section ,Pentane ,Isomeric effect ,SCOP ,Physics ,QC1-999 ,Chemistry ,QD1-999 - Abstract
In the present article, electron scattering cross sections for n-pentane and its isomers, viz., isopentane (butane-2-methyl), and neopentane (propane-2-2-dimethyl) are reported. The presence of these molecules along with abundant energetic electrons in the atmosphere of Titan make it favorable for many scattering events. Hence, to study the physio-chemical processes taking place in this environment, the cross section data presented here are inevitable. In this work, the cross sections are calculated for a wide energy range. Elastic and momentum transfer cross sections are calculated using group additivity method implemented through spherical complex optical potential formalism, whereas the ionization cross sections are calculated employing the complex scattering potential ionization contribution method. Total cross section is the sum of elastic and ionization cross section. Present calculation includes geometric screening correction to alleviate the overestimation of cross section values arising due to the overlap of atomic electronic charge densities. A reasonable agreement was found between the present values and previous experimental and theoretical results, wherever available.
- Published
- 2021
- Full Text
- View/download PDF
31. Chondrocytic and pharmacokinetic properties of Phlpp inhibitors
- Author
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E.L. Taylor, S.R. Weaver, E.L. Zars, C.A. Turner, S.A. Buhrow, J.M. Reid, E.W. Bradley, and J.J. Westendorf
- Subjects
Osteoarthritis ,Pharmacokinetics ,Articular cartilage ,SCOP ,Diseases of the musculoskeletal system ,RC925-935 - Abstract
Objective: The pleckstrin homology domain leucine-rich repeat protein phosphatases (Phlpp1/2) were recently identified as potential therapeutic targets for cartilage regeneration in osteoarthritic joints. Phlpp inhibitors NSC 117079 and NSC 45586 increase chondrocyte proliferation and matrix production, but the pharmacodynamics and pharmacokinetics of these compounds are not known. Design: Chondrocytic effects of Phlpp inhibitors, NSC 117079 and NSC 45586, were measured by western blotting of Phlpp substrates, glycosaminoglycan (GAG) assays, and transcriptomic assays. Liquid chromatography/mass spectroscopy assays were established to measure NSC 117079 and NSC 45586 in vitro and in vivo. The effects of NSC 117079 and NSC 45586 on articular cartilage structure in vivo after intra-articular injection were determined by histology. Results: The Phlpp inhibitors NSC 117079 and NSC 45586 were highly stable in vitro and stimulated GAG, Sox9, proteoglycan 4 and collagen 2 production in maturing but not more differentiated chondrocytes in vitro. Both molecules reduced Phlpp1/2 levels and suppressed matrix degradation to functionally extend their inhibitory effect on these phosphatases. In vivo, NSC 117079 was eliminated from the bloodstream within 4 h after intravenous injection, while NSC 45586 was eliminated in 8 h and had a higher volume distribution. Both molecules increased articular cartilage area on lateral and medial tibial plateaus and femoral condyles by 15% in C57Bl/6 mice between four and five weeks of age. Conclusion: These data advance our understanding of how Phlpp inhibitors promote and preserve cartilage formation and provide a basis for understanding their safety and activity in vivo.
- Published
- 2021
- Full Text
- View/download PDF
32. Defrosting of Air-Source Heat Pumps: Effect of Real Temperature Data on Seasonal Energy Performance for Different Locations in Italy.
- Author
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Rossi di Schio, Eugenia, Ballerini, Vincenzo, Dongellini, Matteo, and Valdiserri, Paolo
- Subjects
AIR source heat pump systems ,SEASONS ,HEAT pumps ,METEOROLOGICAL stations ,ENERGY consumption - Abstract
Featured Application: The present analysis provides evidence on the importance of the correct evaluation of the defrosting cycles in the determination of the SCOP of ASHPs. In this paper, dynamic simulations of the seasonal coefficient of performance (SCOP) of Air-Source Heat Pumps will be presented by considering three different heat pump systems coupled with the same building located in three different Italian municipalities: S. Benedetto del Tronto (42°58′ North, 13°53′ East), Milan (45°28′ North, 9°10′ East), and Livigno (46°28′ North, 10°8′ East). Dynamic simulations were conducted by employing the software package TRNSYS and by considering real weather data (i.e., outdoor air temperature and humidity as well as solar radiation) referring to the three abovementioned cities for a period of 8 years (2013–2020) and collected from on-site weather stations. Attention has been paid to the modeling of the heat pump defrost cycles in order to evaluate their influence on the unit's seasonal performance. Results show that, when referring to different years, the thermal energy demand displays huge variations (in some cases it can even double its value), while the effective SCOP is characterized by scarce variability. Sensible variations in SCOP values are achieved for Livigno. [ABSTRACT FROM AUTHOR]
- Published
- 2021
- Full Text
- View/download PDF
33. Performance Analysis of Deep Learning Methods for Protein Contact Prediction in CASP13
- Author
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Romina Valdez, Khevin Roig, Diego P. Pinto-Roa, and Jose Colbes
- Subjects
protein contact prediction ,protein structure prediction ,deep learning ,CASP ,SCOP ,Electronic computers. Computer science ,QA75.5-76.95 - Abstract
Protein structure prediction is one of the most important problems in Computational Biology; and consists of determining the 3D structure of a protein given its amino acid sequence. A key component that has allowed considerable improvements in recent decades is the prediction of contacts in a protein, since it provides fundamental information about its three-dimensional structure. In the 13th edition of the CASP (Critical Assessment of protein Structure Prediction), a notable progress has been evidenced for both problems with the use of deep learning algorithms. For the contact prediction category, the best methods in CASP13 achieved an average precision of 70%. In the present work, the performance of these methods is analyzed using a larger data set, with 483 proteins from four families according to the structural classication of the SCOP database (Structural Classication of Proteins). The selected methods were evaluated using the CASP metrics, and their results indicate an average contact prediction precision greater than 90%. SPOT-Contact was the method with the best overall performance, and one of the methods with the best performance for each SCOP class. The set of proteins used for the experiments and the implementations made for the analysis are publicly available.
- Published
- 2021
- Full Text
- View/download PDF
34. A Novel Feature for Recognition of Protein Family Using ANN and Machine Learning
- Author
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Satpute, Babasaheb S., Yadav, Raghav, Singh, Satendra, Barbosa, Simone Diniz Junqueira, Series Editor, Filipe, Joaquim, Series Editor, Kotenko, Igor, Series Editor, Sivalingam, Krishna M., Series Editor, Washio, Takashi, Series Editor, Yuan, Junsong, Series Editor, Zhou, Lizhu, Series Editor, Deshpande, A.V., editor, Unal, Aynur, editor, Passi, Kalpdrum, editor, Singh, Dharm, editor, Nayak, Malaya, editor, Patel, Bharat, editor, and Pathan, Shafi, editor
- Published
- 2018
- Full Text
- View/download PDF
35. Recognition of Protein Family Using a Novel Classification System
- Author
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Satpute, Babasaheb S., Yadav, Raghav, Barbosa, Simone Diniz Junqueira, Series Editor, Filipe, Joaquim, Series Editor, Kotenko, Igor, Series Editor, Sivalingam, Krishna M., Series Editor, Washio, Takashi, Series Editor, Yuan, Junsong, Series Editor, Zhou, Lizhu, Series Editor, Deshpande, A.V., editor, Unal, Aynur, editor, Passi, Kalpdrum, editor, Singh, Dharm, editor, Nayak, Malaya, editor, Patel, Bharat, editor, and Pathan, Shafi, editor
- Published
- 2018
- Full Text
- View/download PDF
36. Postnatal calpeptin treatment causes hippocampal neurodevelopmental defects in neonatal rats
- Author
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Zhu-Jin Song, San-Juan Yang, Lan Han, Bin Wang, and Guoqi Zhu
- Subjects
nerve regeneration ,postnatal ,calpeptin ,learning and memory ,hippocampus ,spine development ,SCOP ,AKT ,mTOR ,neural regeneration ,Neurology. Diseases of the nervous system ,RC346-429 - Abstract
Our previous studies showed that the early use of calpain inhibitors reduces calpain activity in multiple brain regions, and that postnatal treatment with calpeptin may lead to cerebellar motor dysfunction. However, it remains unclear whether postnatal calpeptin application affects hippocampus-related behaviors. In this study, Sprague-Dawley rats were purchased from the Animal Center of Anhui Medical University of China. For the experiments in the adult stage, rats were intraperitoneally injected with calpeptin, 2 mg/kg, once a day, on postnatal days 7–14. Then on postnatal day 60, the Morris water maze test was used to evaluate spatial learning and memory abilities. The open field test was carried out to assess anxiety-like activities. Phalloidin staining was performed to observe synaptic morphology in the hippocampus. Immunohistochemistry was used to count the number of NeuN-positive cells in the hippocampal CA1 region. DiI was applied to label dendritic spines. Calpeptin administration impaired spatial memory, caused anxiety-like behavior in adulthood, reduced the number and area of apical dendritic spines, and decreased actin polymerization in the hippocampus, but did not affect the number of NeuN-positive cells in the hippocampal CA1 region. For the neonatal experiments, neonatal rats were intraperitoneally injected with calpeptin, 2 mg/kg, on postnatal days 7 and 8. Western blot assay was performed to analyze the protein levels of Akt, Erk, p-Akt, p-Erk1/2, Erk1/2, SCOP, PTEN, mTOR, p-mTOR, CREB and p-CREB in the hippocampus. SCOP expression was increased, and the phosphorylation levels of Akt, mTOR and CREB were reduced in the hippocampus. These findings show that calpeptin administration after birth affects synaptic development in neonatal rats by inhibiting the Akt/mTOR signaling pathway, thereby perturbing hippocampal function. Therefore, calpeptin administration after birth is a risk factor for neurodevelopmental defects.
- Published
- 2019
- Full Text
- View/download PDF
37. Machine learning-based prediction of proteins' architecture using sequences of amino acids and structural alphabets.
- Author
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Abbass J and Parisi C
- Abstract
In addition to the growth of protein structures generated through wet laboratory experiments and deposited in the PDB repository, AlphaFold predictions have significantly contributed to the creation of a much larger database of protein structures. Annotating such a vast number of structures has become an increasingly challenging task. CATH is widely recognized as one the most common platforms for addressing this challenge, as it classifies proteins based on their structural and evolutionary relationships, offering the scientific community an invaluable resource for uncovering various properties, including functional annotations. While CATH annotation involves - to some extent - human intervention, keeping up with the classification of the rapidly expanding repositories of protein structures has become exceedingly difficult. Therefore, there is a pressing need for a fully automated approach. On the other hand, the abundance of protein sequences stemming from next generation sequencing technologies, lacking structural annotations, presents an additional challenge to the scientific community. Consequently, 'pre-annotating' protein sequences with structural features, ensuring a high level of precision, could prove highly advantageous. In this paper, after a thorough investigation, we introduce a novel machine-learning model capable of classifying any protein domain, whether it has a known structure or not, into one of the 40 main CATH Architectures. We achieve an F1 Score of 0.92 using only the amino acid sequence and a score of 0.94 using both the sequence of amino acids and the sequence of structural alphabets.Communicated by Ramaswamy H. Sarma.
- Published
- 2024
- Full Text
- View/download PDF
38. Defrosting of Air-Source Heat Pumps: Effect of Real Temperature Data on Seasonal Energy Performance for Different Locations in Italy
- Author
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Eugenia Rossi di Schio, Vincenzo Ballerini, Matteo Dongellini, and Paolo Valdiserri
- Subjects
air-source heat pumps ,SCOP ,heat pump seasonal performance ,defrosting ,real weather data ,Technology ,Engineering (General). Civil engineering (General) ,TA1-2040 ,Biology (General) ,QH301-705.5 ,Physics ,QC1-999 ,Chemistry ,QD1-999 - Abstract
In this paper, dynamic simulations of the seasonal coefficient of performance (SCOP) of Air-Source Heat Pumps will be presented by considering three different heat pump systems coupled with the same building located in three different Italian municipalities: S. Benedetto del Tronto (42°58′ North, 13°53′ East), Milan (45°28′ North, 9°10′ East), and Livigno (46°28′ North, 10°8′ East). Dynamic simulations were conducted by employing the software package TRNSYS and by considering real weather data (i.e., outdoor air temperature and humidity as well as solar radiation) referring to the three abovementioned cities for a period of 8 years (2013–2020) and collected from on-site weather stations. Attention has been paid to the modeling of the heat pump defrost cycles in order to evaluate their influence on the unit’s seasonal performance. Results show that, when referring to different years, the thermal energy demand displays huge variations (in some cases it can even double its value), while the effective SCOP is characterized by scarce variability. Sensible variations in SCOP values are achieved for Livigno.
- Published
- 2021
- Full Text
- View/download PDF
39. Electron impact scattering study on chlorobenzene.
- Author
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Prajapati, Dineshkumar, Yadav, Hitesh, Vinodkumar, Minaxi, Limbachiya, Chetan, and Vinodkumar, P. C.
- Subjects
- *
ELECTRON scattering , *ELECTRONIC excitation , *THRESHOLD energy , *MOMENTUM transfer , *ELECTRON impact ionization - Abstract
In this article, we report a detailed theoretical study on electron interactions with chlorobenzene with incident energies ranging from 0.1 to 5000 eV. Due to this wide range of impact energy, we are able to investigate a variety of processes and report data on resonances, differential cross-sections (DCS), momentum transfer cross-sections (MTCS), rate coefficient, vertical electronic excitations, dissociative electron attachment (DEA), total ionisation cross-sections and total scattering cross-sections (TCS). In order to compute the total scattering cross-sections, we have employed the ab-initio R-matrix method via Quantemol-N for the lower energy range (0.1 eV to 20 eV) and Spherical Complex Optical Potential (SCOP) beyond threshold energy of the target to 5000 eV. The R-matrix calculations are performed using a close-coupling method with the aid of 34 target states, 1667 configuration state functions, and 233 channels employing Configuration Interaction (CI) model. The present study reports evidence for electron scattering resonances through analysis of eigenphase diagrams fitting them to Breit-Wigner profile at low energies below the ionisation threshold. [ABSTRACT FROM AUTHOR]
- Published
- 2019
- Full Text
- View/download PDF
40. «Vous allez trouver une façon d'être dirigeant.» Formation coopérative et résistances ouvrières dans une usine reprise par ses salariés.
- Author
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QUIJOUX, Maxime
- Abstract
Copyright of Politix is the property of De Boeck Universite and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
- Published
- 2019
- Full Text
- View/download PDF
41. Refrigerant charge prediction fluctuations in the scop campaign of a brine-water heat pump
- Author
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Sánchez Moreno Giner, Luis, Barceló Ruescas, Francisco, Gonzálvez- Maciá, José, and Universidad Politécnica de Cartagena
- Subjects
Máquinas y Motores Térmicos ,SCOP ,Natural refrigerants ,Optimisation ,Design conditions ,Refrigerant charge amount ,CYTEF - Abstract
The refrigerant amount reduction is a matter of increasing importance because of the rise in prices of current hydrofluorocarbons and the safety reasons of the leading natural alternatives. There is no space for the refrigerant deposit in vapour compression cycles with refrigerant charge optimised; consequently, it is essential to know which refrigerant charge will make the vapour compression cycle work with the best performance during a year. In this work, a simulation of the different tests of the seasonal COP campaign for a brine-water heat pump is performed using the software IMST-ART. With the results, it can be possible to understand the different behaviour of the heat pump during the year and guess the best criteria to establish the optimum refrigerant charge. The authors are grateful to the Programa de Ayudas de Investigacion y Desarrollo (PAID-01- 17) to partially finance this research. As well, this publication has been carried out in the framework of the project “DECARBONIZACIÓN DE EDIFICIOS E INDUSTRIAS CON SISTEMAS HÍBRIDOS DE BOMBA DE CALOR”, funded by the Spanish “Ministerio de Ciencia e Innovación (MCIN) with code number PID2020- 115665RB-I00.
- Published
- 2023
- Full Text
- View/download PDF
42. Select the Appropriate Map Depending on Context in a Hilbert Space Model (SCOP)
- Author
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Hahn, Juergen, Frank, Andrew U., Hutchison, David, Series editor, Kanade, Takeo, Series editor, Kittler, Josef, Series editor, Kleinberg, Jon M., Series editor, Kobsa, Alfred, Series editor, Mattern, Friedemann, Series editor, Mitchell, John C., Series editor, Naor, Moni, Series editor, Nierstrasz, Oscar, Series editor, Pandu Rangan, C., Series editor, Steffen, Bernhard, Series editor, Terzopoulos, Demetri, Series editor, Tygar, Doug, Series editor, Weikum, Gerhard, Series editor, Atmanspacher, Harald, editor, Haven, Emmanuel, editor, Kitto, Kirsty, editor, and Raine, Derek, editor
- Published
- 2014
- Full Text
- View/download PDF
43. Structural Bioinformatics: Computational Software and Databases for the Evaluation of Protein Structure
- Author
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Ayisha Amanullah and Suad Naheed
- Subjects
Database, PDB ,CATH, MMDB ,SCOP ,domain ,protein-protein complex systems ,Medicine ,Biology (General) ,QH301-705.5 - Abstract
Databases are the computerized platform where information is stored and can be retrieved easily by public users. Biological databases are the repositories of biological data. These biological data libraries contain facts and figures related to various disciplines of research including genomics, proteomics, microarray technology, metabolomics and phylogenetics. By using biological databases, a broad collection of essential biological information can be exploited ranging from function, structure and localization of gene, clinical consequences of mutation to similarity index among biological sequences and structures. Nowadays, different kinds of biological databases are available on the web. The present write up focuses on biological databases and bioinformatics tools for protein structure analysis. This review also aims to elaborate the searching schemes, available in different structural databases. The wide variety of different levels and types of information content related to 3D protein structures are available on web-based databases. Regarding the biological functions and 3D structures of various proteins, these databases provide a huge range of useful links, schematic diagrams as well as strategies for detailed analysis of proteins and other macromolecules structures. 3D structural illustration of proteins stored in structural databases is determined and visualized by X-ray crystallography, electron microscopy and NMR spectroscopy. On regular basis, a large number of protein structures are submitted by structural biologists, updated and curated by subject experts. Most familiar biological databases that store 3D protein and other macromolecules structures include, PDB, 3D Genomics, CATH, & SCOP. These databases contain valuable information of overall protein structures, domains and motif structures, protein-protein complex systems and complex of protein with other biomolecules.
- Published
- 2018
44. Predicción estructural de proteínas usando técnicas de clasificación
- Author
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Christian Charry-Ceballos and Oscar Fernando Bedoya Leiva
- Subjects
Bioinformática ,clasificadores ,predicción estructural ,proteínas ,SCOP ,Technology ,Engineering (General). Civil engineering (General) ,TA1-2040 - Abstract
En este artículo se presenta un nuevo enfoque para la predicción estructural de proteínas. A diferencia de los métodos que existen actualmente, en este trabajo se propone un enfoque en el que se utilizan algoritmos de clasificación basados en aprendizaje supervisado para efectuar la predicción estructural. El desempeño del método propuesto se compara con el de métodos tradicionales como local feature frequency (LFF) usando el conjunto de datos Scop 2,05. Los resultados obtenidos indican que hay una diferencia favorable para el método propuesto y alcanzan porcentajes de proteínas correctamente clasificadas de 92,13 %, en cuanto a clase; 96,32 %, pliegue; 93,05 %, en superfamilia, y 76,35 %, en familia. Así se superan métodos tradicionales como LFF, que obtiene porcentajes de 85,90 %, 90,54 %, 79,85 % y 67,38 % para los mismos niveles estructurales.
- Published
- 2018
- Full Text
- View/download PDF
45. The effect of Cotinus coggygria L. ethanol extract in the treatment of burn wounds
- Author
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Buşra ERTAŞ, Betül OKUYAN, Ali ŞEN, Feriha ERCAN, Hüseyin ÖNEL, Fatih GÖĞER, Göksel ŞENER, and Erta B., OKUYAN B., ŞEN A., ERCAN F., Onel H., GÖGER F., Sener G.
- Subjects
burn wound healing activity ,Farmakoloji ,Life Sciences (LIFE) ,Pharmacy ,phenolic compounds ,Sağlık Bilimleri ,Antioxidant activity ,Drug Guides ,Cotinus coggygria ,ANTIOXIDANT ,Yaşam Bilimleri ,Health Sciences ,FARMAKOLOJİ VE ECZACILIK ,IMPROVES ,LEAVES ,INJURY ,Farmakoloji, Toksikoloji ve Eczacılık (çeşitli) ,Pharmacology (medical) ,General Pharmacology, Toxicology and Pharmaceutics ,OXIDATIVE STRESS ,anti-inflammatory activity ,Eczacılık ,PHARMACOLOGY & PHARMACY ,Pharmacology, Toxicology and Pharmaceutics (miscellaneous) ,Pharmacology ,DAMAGE ,PHARMACOLOGY & TOXICOLOGY ,Temel Bilimler ,Basic Pharmaceutics Sciences ,Life Sciences ,SCOP ,PHENOLIC-COMPOUNDS ,Pharmacology and Therapeutics ,Genel Farmakoloji, Toksikoloji ve Eczacılık ,Farmakoloji (tıbbi) ,MEDICINAL-PLANTS ,Temel Eczacılık Bilimleri ,İlaç Rehberleri ,Yaşam Bilimleri (LIFE) ,Farmakoloji ve Toksikoloji ,HEALING PROPERTIES ,Natural Sciences - Abstract
The overall aim of the present research is to evaluate for the first time the curative effect of Cotinus coggygria leaves on burn injury in an experimental burn model along with its anti-inflammatory and antioxidant activity potential. Also, phenolic compounds of C. coggygria were characterised by LC-MS/MS. Wistar albino rats weighing 200-250 g were exposed to 90 degrees C bath for 10 s to induce burn injury, involving 30% of the total body surface area. In the treatment groups, 5% C. coggygria ethanol extract was applied topically as a cream immediately after the burn. Blood and skin tissue samples were taken after decapitation at the 4th and 48th hours following the burn procedure. Interleukin 1-beta (IL-1 beta) and tumour necrosis factor (TNF-alpha) were determined in serum samples, and hydroxyproline, prostoglandin E2 (PGE2), and myeloperoxidase (MPO) activity and 8-hydroxy-2\"-deoxy-guanosine (8-OHdG) levels were determined in skin tissue samples. Increased levels of serum cytokines were decreased with C. coggygria treatment in both periods. MPO activity, prostaglandine (PGE2), and 8-OhdG levels increased, while hydroxyproline levels decreased due to burn damage. On the other hand, these parameters were returned to its normal levels with C. coggygria treatment. In addition, the tissue histology of animals treated with C. coggygria showed a complete epithelialization with increased collagenation. As a result, C. coggygria may be an alternative treatment approach for burns-induced skin damage and wounds.
- Published
- 2022
- Full Text
- View/download PDF
46. Performance et rareté des coopératives de travailleurs : contributions empiriques à partir du cas français (Scop)
- Author
-
Mirabel, Thibault
- Subjects
participation salariale ,survie ,coût échoué ,labor-managed firm ,Scop ,sunk cost ,coopérative ,employee ownership ,barrière à l’entrée ,worker cooperative ,survival ,barrier to entry - Abstract
La thèse compare la performance des coopératives de travailleurs (Scop) et des entreprises conventionnelles. Ces deux types d’entreprise diffèrent par leur distribution des droits de propriété et leur mode de gouvernance. Au sein des Scop, les travailleurs ont le contrôle ultime de leur entreprise, tandis qu’au sein des entreprises conventionnelles, les investisseurs ont ce contrôle. Les Scop instituent la démocratie dans le monde économique. Malgré leur attractivité, elles représentent une fraction minuscule des entreprises dans le monde (2 400 en France). Cette thèse entend apporter des éléments nouveaux pour comprendre la rareté des Scop. Le chapitre 1 montre que la probabilité de créer une Scop est maximale lorsque le coût irrécupérable en travail est dominant et que le coût irrécupérable en capital est négligeable. Le chapitre 2 montre que les Scop survivent plus longtemps que les entreprises conventionnelles, indépendamment du fait que leurs ressources à l’entrée diffèrent ou non. Le chapitre 3 montre que les reprises en Scop, même d’entreprises en difficulté, survivent plus longtemps que les Scop nouvellement créées. Dans l’ensemble, cette thèse suggère que la rareté des Scop est due à des barrières à l’entrée spécifiques aux Scop, plutôt qu’à leur prétendue moindre performance vis-à-vis des entreprises conventionnelles. This thesis compares the performance of worker-owned firms (WOFs) and conventional firms. These types of firms differ by their distribution of ownership rights and their mode of governance. In WOFs, the ultimate control is held by the suppliers of labour, whereas in conventional firms the ultimate control is held by the suppliers of capital. WOFs represent an implementation of democracy in firms. Despite their attractiveness, WOFs represent a minute proportion of firms in our contemporary economies (2,400 in France). This thesis seeks to bring new insights and stylized facts to better understand the rarity of WOFs. Chapter 1 shows that the likelihood of WOF entry is the highest when the sunk cost of human capital is dominant while the sunk cost of physical capital is negligible. Chapter 2 shows that WOFs survive longer than conventional firms regardless of whether they have different or similar entry resources. Chapter 3 shows that any type of worker buyout, even from firms in difficulty, survives longer than newly created WOFs. Overall, this thesis suggests that the rarity of WOFs is more likely to result from entry barriers specific to WOFs rather than from poor performance compared to CFs.
- Published
- 2023
47. Toward a Formal Model of the Shifting Relationship between Concepts and Contexts during Associative Thought
- Author
-
Veloz, Tomas, Gabora, Liane, Eyjolfson, Mark, Aerts, Diederik, Hutchison, David, Series editor, Kanade, Takeo, Series editor, Kittler, Josef, Series editor, Kleinberg, Jon M., Series editor, Mattern, Friedemann, Series editor, Mitchell, John C., Series editor, Naor, Moni, Series editor, Nierstrasz, Oscar, Series editor, Pandu Rangan, C., Series editor, Steffen, Bernhard, Series editor, Sudan, Madhu, Series editor, Terzopoulos, Demetri, Series editor, Tygar, Doug, Series editor, Vardi, Moshe Y., Series editor, Weikum, Gerhard, Series editor, Song, Dawei, editor, Melucci, Massimo, editor, Frommholz, Ingo, editor, Zhang, Peng, editor, Wang, Lei, editor, and Arafat, Sachi, editor
- Published
- 2011
- Full Text
- View/download PDF
48. Automatic Classification of Protein Structure Using the Maximum Contact Map Overlap Metric
- Author
-
Rumen Andonov, Hristo Djidjev, Gunnar W. Klau, Mathilde Le Boudic-Jamin, and Inken Wohlers
- Subjects
maximum contact map overlap ,protein space metric ,k-nearest neighbor classification ,superfamily classification ,SCOP ,Industrial engineering. Management engineering ,T55.4-60.8 ,Electronic computers. Computer science ,QA75.5-76.95 - Abstract
In this work, we propose a new distance measure for comparing two protein structures based on their contact map representations. We show that our novel measure, which we refer to as the maximum contact map overlap (max-CMO) metric, satisfies all properties of a metric on the space of protein representations. Having a metric in that space allows one to avoid pairwise comparisons on the entire database and, thus, to significantly accelerate exploring the protein space compared to no-metric spaces. We show on a gold standard superfamily classification benchmark set of 6759 proteins that our exact k-nearest neighbor (k-NN) scheme classifies up to 224 out of 236 queries correctly and on a larger, extended version of the benchmark with 60; 850 additional structures, up to 1361 out of 1369 queries. Our k-NN classification thus provides a promising approach for the automatic classification of protein structures based on flexible contact map overlap alignments.
- Published
- 2015
- Full Text
- View/download PDF
49. A Protein Classifier Based on SVM by Using the Voxel Based Descriptor
- Author
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Mirceva, Georgina, Naumoski, Andreja, Davcev, Danco, Hutchison, David, editor, Kanade, Takeo, editor, Kittler, Josef, editor, Kleinberg, Jon M., editor, Mattern, Friedemann, editor, Mitchell, John C., editor, Naor, Moni, editor, Nierstrasz, Oscar, editor, Pandu Rangan, C., editor, Steffen, Bernhard, editor, Sudan, Madhu, editor, Terzopoulos, Demetri, editor, Tygar, Doug, editor, Vardi, Moshe Y., editor, Weikum, Gerhard, editor, Goebel, Randy, editor, Siekmann, Jörg, editor, Wahlster, Wolfgang, editor, Szczuka, Marcin, editor, Kryszkiewicz, Marzena, editor, Ramanna, Sheela, editor, Jensen, Richard, editor, and Hu, Qinghua, editor
- Published
- 2010
- Full Text
- View/download PDF
50. Electron-induced scattering dynamics of Boron, Aluminium and Gallium trihalides in the intermediate energy domain.
- Author
-
Verma, Pankaj, Alam, Mohammad Jane, Ahmad, Shabbir, and Antony, Bobby
- Subjects
- *
DENSITY functional theory , *BORON , *ALUMINUM , *HALIDES , *GALLIUM - Abstract
This article is focused on the calculation of electron-induced ionisation and total scattering cross sections by Boron, Aluminium and Gallium trihalide molecules in the intermediate energy domain. The computational formalism, spherical complex optical potential has been employed for the study of these two scattering cross sections. The ionisation cross section has been derived from the inelastic cross section using a semi-empirical method called complex scattering potential-ionisation contribution (CSP-ic) method. We have also calculated the ionisation cross section using the BEB theory with Hartree-Fock and density functional theory (DFT- ωB97XD) orbitals so that a comparison can be made with the cross sections predicted by CSP-ic method. For this theoretical study, we have also calculated polarisability and bond length of some targets which were not found in literature using DFT/B3LYP in Gaussian 09 software. [ABSTRACT FROM AUTHOR]
- Published
- 2018
- Full Text
- View/download PDF
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