Relevant bibliographies by topics / DPP based molecules

Academic literature on the topic 'DPP based molecules'

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Published: 6 September 2023

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Journal articles on the topic "DPP based molecules"

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Li, Dizao, Qiang Wang, Liping Wang, Weifeng Zhang, and Gui Yu. "Synthesis and Performance of (E)-3-Phenyl-2-(thiophen-2-yl)acrylonitrile-Based Small-Molecule Semiconductors." Organic Materials 01, no. 01 (November 2019): 078–87. http://dx.doi.org/10.1055/s-0039-3402057.

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Based on diketopyrrolopyrrole (DPP) and (E)-3-phenyl-2-(thiophen-2-yl)acrylonitrile (BVCNT)-linked conjugated backbones, three donor–acceptor type conjugated organic small-molecule compounds DPP-BVCNT, DPP-2FBVCNT, and DPP-3FBVCNT were designed and synthesized. Among them, the 2-decyltetradecyl side chain on the DPP acceptor unit was used to ensure the solubility of the material. The fluorine (F) atoms combined with the nitrile on the BVCNT donor unit were used to adjust electronic structures and charge carrier transport properties of the conjugated system. All the three small molecules exhibited good solution dispersibility and thermal stability, providing an important guarantee for the solution processing and annealing optimization of organic field-effect transistors (OFETs). The top-gate-bottom-contact OFET devices based on these compounds showed good ambipolar or p-type performances. The relationship between molecular structures and OFET performances indicated that the F-substitution and its position significantly affected their charge carrier transport properties. The F-substitution could remarkably change the performance from p-type to ambipolar especially for the outer-side-F-substituted compound DPP-2FBVCNT, which showed the best OFET performances with the maximum hole/electron mobilities of 0.023/0.220 cm2 V−1 s−1. These results provided a promising idea for developing small-molecule OFET materials with good solution processability, good thermal stability, and high ambipolar performances.
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Patil, Yuvraj, Rajneesh Misra, Abhishek Sharma, and Ganesh D. Sharma. "D–A–D–π–D–A–D type diketopyrrolopyrrole based small molecule electron donors for bulk heterojunction organic solar cells." Physical Chemistry Chemical Physics 18, no. 25 (2016): 16950–57. http://dx.doi.org/10.1039/c6cp02700h.

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Peng, Zhe, Shuangxiong Dai, Yingchun Ji, Bin Tong, Jianbing Shi, Zhengxu Cai, Junge Zhi, and Yuping Dong. "Ionic liquid crystals with aggregation-induced emission properties based on pyrrolo[3,2-b]pyrrole salt compounds." Materials Chemistry Frontiers 3, no. 7 (2019): 1385–90. http://dx.doi.org/10.1039/c9qm00208a.

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Liu, Hui, Xiao-Feng Zhang, Jing-Zhao Cheng, Ai-Guo Zhong, He-Rui Wen, and Shi-Yong Liu. "Novel Diketopyrrolopyrrole-Based π-Conjugated Molecules Synthesized Via One-Pot Direct Arylation Reaction." Molecules 24, no. 9 (May 7, 2019): 1760. http://dx.doi.org/10.3390/molecules24091760.

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Diketopyrrolopyrrole (DPP) is an important type of π-conjugated building block for high-performance organic electronic materials. DPP-based conjugated materials are usually synthesized via Suzuki, Stille, or Negishi cross-coupling reactions, which require organometallic precursors. In this paper, a series of novel phenyl-cored DPP molecules, including five meta-phenyl-cored molecules and four para-phenyl-cored molecules, have been synthesized in moderate to good yields, in a facile manner, through the Pd-catalyzed direct arylation of C–H bonds, and their optoelectrical properties have been investigated in detail. All new molecules have been fully characterized by NMR, MALDI-TOF MS, elemental analysis, UV–visible spectroscopy, and cyclic voltammetry. This synthetic strategy has evident advantages of atom- and step-economy and low cost, compared with traditional cross-coupling reactions.
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Kim, Yu Jin, Chang Eun Song, Sanjaykumar R. Suranagi, Jong-Cheol Lee, and Chan Eon Park. "Markedly different molecular formation in DPP-based small-molecule solar cells probed by grazing-incidence wide-angle X-ray scattering." Acta Crystallographica Section B Structural Science, Crystal Engineering and Materials 73, no. 5 (September 19, 2017): 916–22. http://dx.doi.org/10.1107/s2052520617009933.

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This study comprehensively explores the nanostructural properties of two diketopyrrolo[3,4-c]pyrrole-1,4-dione (DPP)-based small molecules with different alkyl side groups and their blends with the fullerene derivative PC71BM, using grazing-incidence wide-angle X-ray scattering synchrotron techniques. Preferentially relative face-on orientation within the larger and more ordered stacking phase of SM1 with its shorter side group (ethylhexyl) was observed in the majority of both pristine and blend thin films, whereas SM2 crystals showed strictly perpendicular orientation. These contrasting crystalline characteristics led to significant differences in the results, from which crystalline structure–performance property correlations are proposed. Thus, the results not only demonstrate important scientific insights into the relationship between molecular structure and crystalline formation but also provide molecular design directions that will facilitate further improvement to the morphology and performance of DPP-based small-molecule solar cells.
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Kojima, Takahiko, Tatsuaki Nakanishi, Tatsuhiko Honda, and Shunichi Fukuzumi. "Photoinduced electron transfer in supramolecular assemblies involving saddle-distorted porphyrins and phthalocyanines." Journal of Porphyrins and Phthalocyanines 13, no. 01 (January 2009): 14–21. http://dx.doi.org/10.1142/s1088424609000164.

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Unique supramolecular assemblies are constructed based on a saddle-distorted non-planar porphyrin, dodecaphenylporphyrin ( H 2 DPP ), and its metal complexes. The saddle distortion facilitates protonation of pyrrole nitrogens to afford a stable diprotonated porphyrin, which can act as an electron acceptor. A diprotonated hydrochloride salt of a saddle-distorted dodecaphenylporphyrin ([ H 4 DPP ] Cl 2) forms a nano-sized channel structure called a "porphyrin nanochannel". Electron-donating molecules such as hydroquinones are included as guest molecules in the porphyrin nanochannel. Photoinduced electron transfer from the guest molecules to the singlet state of H 4 DPP 2+ occurs, producing H 4 DPP +• and cation radicals of the guest molecules. The saddle distortion also results in higher Lewis acidity at a metal center to maintain axial coordination of ligands, due to poor overlap of the lone-pair orbitals with the d orbitals of the metal center. By taking advantage of saddle distortion of both H 4 DPP 2+ and zinc phthalocyanine, 1,4,8,11,15,18,22,25-octaphenylphthalocyanine ( ZnOPPc ), a discrete supramolecular assembly composed of H 4 DPP 2+ and ZnOPPc , is obtained using 4-pyridinecarboxylate (4-PyCOO-) that connects the two components by hydrogen bonding and coordination bonding, respectively. Photoexcitation of the assembly results in efficient electron transfer from ZnOPPc to H 4 DPP 2+ in the supramolecular complex.
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Namepetra, Andrew, Elizabeth Kitching, Ala'a F. Eftaiha, Ian G. Hill, and Gregory C. Welch. "Understanding the morphology of solution processed fullerene-free small molecule bulk heterojunction blends." Physical Chemistry Chemical Physics 18, no. 18 (2016): 12476–85. http://dx.doi.org/10.1039/c6cp01269h.

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The impact of processing conditions on the morphological characteristics of bulk-heterojunction molecular blends prepared from small molecules based on diketopyrrolopyrrole (DPP) and perylene-diimide (PDI) chromophores have been investigated.
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Liu, Qian, Abhijith Surendran, Krishna Feron, Sergei Manzhos, Xuechen Jiao, Christopher R. McNeill, Steven E. Bottle, John Bell, Wei Lin Leong, and Prashant Sonar. "Diketopyrrolopyrrole based organic semiconductors with different numbers of thiophene units: symmetry tuning effect on electronic devices." New Journal of Chemistry 42, no. 6 (2018): 4017–28. http://dx.doi.org/10.1039/c7nj03505e.

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Zhao, Chaowei, Yiting Guo, Yuefeng Zhang, Nanfu Yan, Shengyong You, and Weiwei Li. "Diketopyrrolopyrrole-based conjugated materials for non-fullerene organic solar cells." Journal of Materials Chemistry A 7, no. 17 (2019): 10174–99. http://dx.doi.org/10.1039/c9ta01976f.

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Park, Keon Joo, Chae Won Kim, Min Jae Sung, Jiyoul Lee, and Young Tea Chun. "Semiconducting Polymer Nanowires with Highly Aligned Molecules for Polymer Field Effect Transistors." Electronics 11, no. 4 (February 18, 2022): 648. http://dx.doi.org/10.3390/electronics11040648.

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Conjugated polymers have emerged as promising materials for next-generation electronics. However, in spite of having several advantages, such as a low cost, large area processability and flexibility, polymer-based electronics have their own limitations concerning low electrical performance. To achieve high-performance polymer electronic devices, various strategies have been suggested, including aligning polymer backbones in the desired orientation. In the present paper, we report a simple patterning technique using a polydimethylsiloxane (PDMS) mold that can fabricate highly aligned nanowires of a diketopyrrolopyrrole (DPP)-based donor–acceptor-type copolymer (poly (diketopyrrolopyrrole-alt-thieno [3,2-b] thiophene), DPP-DTT) for high-performance field effect transistors. The morphology of the patterns was controlled by changing the concentration of the DPP-based copolymer solution (1, 3, 5 mg mL−1). The molecular alignment properties of three different patterns were observed with a polarized optical microscope, polarized UV-vis spectroscopy and an X-ray diffractometer. DPP-DTT nanowires made with 1 mg mL−1 solution are highly aligned and the polymer field-effect transistors based on nanowires exhibit more than a five times higher charge carrier mobility as compared to spin-coated film-based devices.
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Dissertations / Theses on the topic "DPP based molecules"

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Li, Yan. "Cyclodipeptide synthases : towards understanding their catalytic mechanism and the molecular bases of their specificity." Phd thesis, Université Paris Sud - Paris XI, 2012. http://tel.archives-ouvertes.fr/tel-00868787.

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Cyclodipeptides and their derivatives, the diketopiperazines (DKPs), constitute a large class of secondary metabolites with noteworthy biological activities that are mainly synthesized by microorganisms. The biosynthetic pathways of some DKPs contain cyclodipeptide synthases (CDPSs), a newly defined family of enzymes. CDPSs hijack aminoacyl-tRNAs from their essential role in ribosomal protein synthesis to catalyze the formation of the two peptide bonds of various cyclodipeptides. The aim of the work presented in this thesis manuscript is to characterize the CDPS family. At first, the structural and mechanistic characterization of the first identified CDPS, AlbC of Streptomyces noursei, is presented. Then, the results obtained with three other CDPSs, each of which having suitable properties to increase our understanding of the CDPS family, are described. The CDPS Ndas_1148 of Nocardiopsis dassonvillei extends our knowledge of the molecular bases of the CDPS specificity. The CDPS AlbC-IMI of S. sp. IMI 351155 is a good model to analyze the interaction of each of the two substrates required for the formation of a cyclodipeptide. Finally, the characterization of the CDPS Nvec-CDPS2 from Nematostella vectensis provides the first example of enzymes of animal origin involved in nonribosomal peptide synthesis.
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Sarkalya, Ashish Kr. "Studies on switching of J and H aggregates in Donor-Acceptor molecular materials." Thesis, 2019. https://etd.iisc.ac.in/handle/2005/5125.

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The aggregation of molecular materials plays a central role in determining their functional properties. In the aggregated state, conjugated chromophores may exhibit enhanced emission, in comparison to their dilute solution. The studies described in this thesis is aimed towards understanding the dynamic behaviour of aggregates (H and J type) in donor-acceptor based -conjugated chromophores. We discuss the synthesis and characterization of three diketopyrrolopyrrole (DPP) based chromophores and their optical properties in solution and thin fi lm. The H and J type aggregates were identi fied by temperature dependence photoluminescence studies. The observation of both H and J aggregates in thin fi lms (pure and with host) of one of the DPP derivatives are corroborated by computational investigations of coulombic coupling between the monomers. By varying the shearing angle between the monomers in the crystal geometry, we nd that both the type of aggregates can exist, in line with the different temperature-dependent intensity ratio plots.
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Books on the topic "DPP based molecules"

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Hong, S., Y. K. Kwon, J. S. Ha, N. K. Lee, B. Kim, and M. Sung. Self-assembly strategy of nanomanufacturing of hybrid devices. Edited by A. V. Narlikar and Y. Y. Fu. Oxford University Press, 2017. http://dx.doi.org/10.1093/oxfordhb/9780199533060.013.10.

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This article considers the nanomanufacturing of hybrid devices using the self-assembly strategy. Hybrid devices utilize nanomaterials such as nanoparticles, organic molecules, carbon nanotubes (CNTs), and nanowires. Examples include CNT-based circuits and molecular electronics. However, a major stumbling block holding back the practical applications of hybrid systems can be a lack of a mass-production method for such devices. This article first describes the direct patterning of nanostructures by means of dip-pen nanolithography and microcontact printing before discussing the fabrication of nanostructures using directed assembly. It also examines the mechanism of various assembly processes ofnanostructures and concludes with an overview of the characteristics of self-assembled hybrid nanodevices.
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Book chapters on the topic "DPP based molecules"

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von Morze, Cornelius, Galen D. Reed, Zhen J. Wang, Michael A. Ohliger, and Christoffer Laustsen. "Hyperpolarized Carbon (13C) MRI of the Kidneys: Basic Concept." In Methods in Molecular Biology, 267–78. New York, NY: Springer US, 2021. http://dx.doi.org/10.1007/978-1-0716-0978-1_16.

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AbstractExisting clinical markers for renal disease are limited. Hyperpolarized (HP) 13C MRI is based on the technology of dissolution dynamic nuclear polarization (DNP) and provides new avenues for imaging kidney structure, function, and most notably, renal metabolism, addressing some of these prior limitations. Changes in kidney structure and function associated with kidney disease can be evaluated using [13C]urea, a metabolically inert tracer. Metabolic changes can be assessed using [1-13C]pyruvate and a range of other rapidly metabolized small molecules, which mainly probe central carbon metabolism. Results from numerous preclinical studies using a variety of these probes demonstrated that this approach holds great potential for monitoring renal disease, although more work is needed to bridge intelligently into clinical studies. Here we introduce the general concept of HP 13C MRI and review the most relevant probes and applications to renal disease, including kidney cancer, diabetic nephropathy and ischemic kidney injury.This chapter is based upon work from the PARENCHIMA COST Action, a community-driven network funded by the European Cooperation in Science and Technology (COST) program of the European Union, which aims to improve the reproducibility and standardization of renal MRI biomarkers. This introduction chapter is complemented by two separate chapters describing the experimental procedure and data analysis.
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Zaier, Rania, and Sahbi Ayachi. "Computational Study on Optoelectronic Properties of Donor-Acceptor Type Small π-Conjugated Molecules for Organic Light-Emitting Diodes (OLEDs) and Nonlinear Optical (NLO) Applications." In Density Functional Theory - Recent Advances, New Perspectives and Applications. IntechOpen, 2022. http://dx.doi.org/10.5772/intechopen.98590.

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Recently, donor-acceptor type molecule that contains electron-rich (D) and electron-deficient (A) moiety has emerged as an interesting approach of molecular design strategy to develop organic light-emitting diodes (OLEDs) and non-linear optical (NLO) devices. In this work, we report a theoretical investigation based on two donor-acceptor (D-A) type small π-conjugated molecules based on dithieno [3,2-b: 2′,3′-d] pyrrole (DTP) and anthracene derivatives. All of the theoretical calculations were performed by Density Functional Theory (DFT) approach at B3LYP/6-31 g(d) level of theory. The structural, electronic, optical and charge transfer properties were investigated. The effect of acceptor blocks (DPA and DTA) on the molecular characteristics was elucidated. The obtained results clearly show that the studied compounds exhibit non-coplanar structures with low electronic band gap values. These relevant structures exhibited important optical absorption and intense emission in the green-yellow region. NLO investigation based on static polarizability (α0), first-order hyperpolarizability (β0) and second-order hyperpolazabilty (ɣ0) demonstrated that the studied materials exhibit excellent NLO properties. Thus, the designed materials showed promising capabilities to be utilized in OLED and NLO applications.
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Zong, Liang, Jingning Zhang, Dan Li, Shaohui Sui, Yanhua Xiao, Jian Li, Meng Liu, Bo Zhuang, Daxue Li, and Weihui Wu. "A Rhodamine-Based Probe for Detection of Nerve Agents Simulants." In Advances in Transdisciplinary Engineering. IOS Press, 2021. http://dx.doi.org/10.3233/atde210333.

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In this paper, a rhodamine-based fluorescent and chromogenic probe, N-(Rhodamine B)-lactam-2-aminobenzyl alcohol (RB-AB), was designed to detect nerve agent simulants. We firstly synthesized RB-AB probe by using rhodamine B and 2-aminobenzyl alcohol as main materials. Secondly, the RB-AB probe was applied to evaluate its ability to detect two nerve agent simulants, diethyl chloride phosphate (DCP) and methyl ethyl chloride phosphate (MECP). It was assumed that RB-AB could react with the nerve agent simulants through the benzyl alcohol group and then undergoes structural changes. As a result, the RB-AB detection solution shows fluorescent and color changes during detecting process. The maximum intensity of fluorescence emission increases with the addition of DCP or MECP in a dose-dependent manner. The LOD (limit of detection) of the probe is about 20 ppm for DCP. Moreover, a significant pink color change can be observed in the RB-AB system within a few seconds when detecting DCP or MECP. In conclusion, a rhodamine-based molecule as a fluorescent and chromogenic probe was developed for detecting nerve agent simulants. The RB-AB probe solutions can give rapid and off-on type optical changes including color and fluorescence when reacting with DCP or MECP. We anticipate that RB-AB probe can be used as a helpful tool for visual and fluorescent detection of nerve agents when meeting with terrorist attacks involving with these agents so that effective measures could be promptly taken to cope with the crises.
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Misra, Kamakhya Prakash. "Al Doped ZnO Thin Films: Beginning to Developments Afoot." In Materials Science: A Field of Diverse Industrial Applications, 46–62. BENTHAM SCIENCE PUBLISHERS, 2023. http://dx.doi.org/10.2174/9789815051247123010005.

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In the last three decades, Zinc oxide (ZnO) has been found to be one of the most resourceful materials having tremendous potential applications in manifolds covering a wide variety of areas. It is continuously explored in different forms and structures. ZnO-based layers have an established place in the industry that ranges from protecting degradable items to detecting toxic gases. A wide variety of ZnO-based advanced coatings and their surface treatments along with innovative functionalization technologies offer a multitude of options for making them useful in diverse industries. Multiple techniques ranging from exceedingly sophisticated ones like molecular beam epitaxy and atomic layer deposition to highly-cost effective ones like sol-gel spin coating and dip coating, etc. have been used for developing the ZnO based thin films. Doping suitable elements into ZnO matrix is the most promising strategy to alter its properties drastically. Out of numerous dopants, Aluminum (Al) offers some of the excellent and reproducible features in ZnO films which make Al doped ZnO (AZO) a reputable system in industries like thin film transistor manufacturing and solar cells. Specifically, its established and repeatable behavior in terms of transparency and conductivity becauseis finding huge applications as a transparent conducting oxide (TCO). Extensive research on AZO coatings derived from different methods day-b-day opens up a new gateway for interesting perspectives by optimizing surface nanostructures. Here a brief account of historical developments of ZnO to AZO films along with their applications in certain key areas like TCOs, solar cells, thin film transistors, flexible electronics and plasmonics, etc. is presented.
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Conference papers on the topic "DPP based molecules"

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Kumar, Anurag, Yutaka Asako, and Mohammad Faghri. "Mesoscopic Simulations of Flow in Microchannel and Comparison With Continuum Model." In ASME 2008 6th International Conference on Nanochannels, Microchannels, and Minichannels. ASMEDC, 2008. http://dx.doi.org/10.1115/icnmm2008-62280.

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Dissipative particle dynamics (DPD) is a mesoscopic particle-based simulation method, where each particle represents a group or packet of actual molecules of the flow field. Despite its usefulness, a fundamental problem of the DPD is that there is no straightforward procedure to relate the soft-particle model to a realistic continuum or molecular model. In the present work, we studied the dynamics of a simple fluid flow in a microchannel based on the coarse-graining of the molecules and expressed DPD units in terms of real units. To compare DPD methodology with continuum theory, a relation between the viscosity of the fluid and dissipative coefficient of DPD was established. DPD equations and parameters were expressed in non-dimensional forms and related to the known hydrodynamic parameters such as Reynolds number and Peclet number. Poiseuille flow of water in microchannel of height 35 μm was modeled for different parameters. Coarse-graining for water was ranged from 5×109 to 5×1010 for each DPD particle. Re and Pe of the flow were varied from 0.7 to 60 and 5 to 140, respectively. Simulated results were compared to the continuum results with a good agreement.
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Lertliangchai, Thitaree, Birol Dindoruk, Ligang Lu, and Xi Yang. "A Comparative Analysis of the Prediction of Gas Condensate Dew Point Pressure Using Advanced Machine Learning Algorithms." In SPE Annual Technical Conference and Exhibition. SPE, 2021. http://dx.doi.org/10.2118/205997-ms.

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Abstract Dew point pressure (DPP) is a key variable that may be needed to predict the condensate to gas ratio behavior of a reservoir along with some production/completion related issues and calibrate/constrain the EOS models for integrated modeling. However, DPP is a challenging property in terms of its predictability. Recognizing the complexities, we present a state-of-the-art method for DPP prediction using advanced machine learning (ML) techniques. We compare the outcomes of our methodology with that of published empirical correlation-based approaches on two datasets with small sizes and different inputs. Our ML method noticeably outperforms the correlation-based predictors while also showing its flexibility and robustness even with small training datasets provided various classes of fluids are represented within the datasets. We have collected the condensate PVT data from public domain resources and GeoMark RFDBASE containing dew point pressure (the target variable), and the compositional data (mole percentage of each component), temperature, molecular weight (MW), MW and specific gravity (SG) of heptane plus as input variables. Using domain knowledge, before embarking the study, we have extensively checked the measurement quality and the outcomes using statistical techniques. We then apply advanced ML techniques to train predictive models with cross-validation to avoid overfitting the models to the small datasets. We compare our models against the best published DDP predictors with empirical correlation-based techniques. For fair comparisons, the correlation-based predictors are also trained using the underlying datasets. In order to improve the outcomes and using the generalized input data, pseudo-critical properties and artificial proxy features are also employed.
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Czerwinska, Justyna, and Nikolaus A. Adams. "Numerical Modeling of Micro-Channel Flows by a DPD Method." In ASME/JSME 2003 4th Joint Fluids Summer Engineering Conference. ASMEDC, 2003. http://dx.doi.org/10.1115/fedsm2003-45127.

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This paper proposes new computational technique to model micro-flows. The presented below method is based on the meso-scale description of fluid. Dissipative Particle Dynamics (DPD) method is derived from Molecular Dynamics by means of coarse graining procedure. The dissipative particle is defined as a Voronoi cell with variable mass and size; evolves similarly to the Molecular Dynamics particles, except that inter-particle forces have additionally fluctuating, dissipative and stochastic component. This representation leads to the set of equations describing DPD approach. In this paper the outline of the DPD method for application to micro-fluidics flow is presented. DPD method in the form of Soft Fluid Particle model, was mainly applied in material science simulation. This paper presents new approach to model micro-flow by Voronoi Particle DPD method. As a particular example the gas flow in micro-channel flow is computed.
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Naga Siva Kumar, G., and Sushanta K. Mitra. "Modeling of Dielectrophoresis for Myoglobin Molecules in a Microchannel With Parallel Electrodes." In ASME 2009 International Mechanical Engineering Congress and Exposition. ASMEDC, 2009. http://dx.doi.org/10.1115/imece2009-10765.

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Myoglobin is one of the important cardiac markers, whose concentration increases from 90 pg/ml to over 5000 pg/ml in the blood serum of heart attack patients. Separation and detection of myoglobin play a vital role in deciding the cardiac arrest in advance, which is the challenging part of ongoing research. In the present study, one of the electrokinetic approach i.e., dielectrophoresis (DEP) is chosen to manipulate the myoglobin molecule in aqueous solution. A generalized theoretical expression is developed for the dielectrophoretic force acting on an arbitrary shape of the particle. Dielectric myoglobin model is developed by approximating the shape of the molecule as sphere, oblate and prolate spheroids. Mathematical model for simulating dielectrophoretic behavior of a myoglobin molecule in a microchannel is developed. The microchannel consists of parallel array of electrodes at the bottom wall. Finite element based approach is considered to solve the problem. The variation in the Clausius-Mossotti factor with respect to the applied electric field frequency is observed for aqueous solution of myoglobin. The crossover frequency is obtained as 30 MHz for given properties, for all the shapes of molecule. Shifting of crossover frequency with conductivity of medium is observed. The simulation results indicate that, the electric field and DEP forces are maximum at the edges of the electrodes and minimum elsewhere. The results also indicate that, DEP force exponentially decayed along the height of the channel.
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Kim, Jinsik, Hye Jin Kim, Kyo Seon Hwang, Eunji Lee, Dong-Hoon Kang, and Hyun-Joon Shin. "Micro-hole array fluorescent sensor based on AC-Dielectrophoresis (DEP) for simultaneous analysis of nano-molecules." In Advanced Biomedical and Clinical Diagnostic and Surgical Guidance Systems XVI, edited by Tuan Vo-Dinh, Anita Mahadevan-Jansen, and Warren S. Grundfest. SPIE, 2018. http://dx.doi.org/10.1117/12.2291359.

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Leung, Gong Wai, Fong Ting Lau, Siu Ling Leung, and Wen J. Li. "Formation of Au Colloidal Crystals for Optical Sensing by DEP-Based Nano-Assembly." In 2007 2nd IEEE International Conference on Nano/Micro Engineered and Molecular Systems. IEEE, 2007. http://dx.doi.org/10.1109/nems.2007.352169.

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Chuang, Cheng-Hsin, Yung-Chung Lee, Huei-Sheng Huang, Fei-Bin Hsiao, You-Ming Hsu, Kai-Hsuan Wang, Ling Ding, and Hui-Ju Hsu. "3D Microstructures Array Single-cell-based DEP Chip for Studying Apoptosis of U937 & A431 Cells." In 2006 1st IEEE International Conference on Nano/Micro Engineered and Molecular Systems. IEEE, 2006. http://dx.doi.org/10.1109/nems.2006.334681.

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Erickson, L. A., P. W. Bergum, E. V. Hubert, N. Y. Theriault, E. F. Rehberg, D. P. Palermo, G. A. W. deMunk, J. H. Verheijen, and K. R. Marotti. "ENHANCEMENT AND INHIBITION OF THE ACTIVITY OF RECOMBINANT ANALOGS OF TISSUE PLASMINOGEN ACTIVATOR." In XIth International Congress on Thrombosis and Haemostasis. Schattauer GmbH, 1987. http://dx.doi.org/10.1055/s-0038-1643844.

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Both the affinity of tissue plasminogen activator (tPA) for fibrin, which is associated with enhancement of its activity, and its susceptibility to inhibition contribute to the ability of this molecule to initiate vascular fibrinolysis. Full-length tPA is thought to consist of five structural regions designated the finger (F), growth factor-like (G), kringle 1 (K1), kringle 2 (K2), and protease (P) domains. Previous studies have suggested that the interaction of tPA with fibrin is primarily dependent upon the presence of the F and K2 domains, with its inhibition minimally requiring an intact active site. We have generated analogs of tPA with which to study further the relationship between the structure and the function of these domains. Synthetic DNA molecules, encoding specific tPA analogs and containing unique restriction sites in the interdomain regions, were expressed in Chinese hamster ovary cells. Serum-free media conditioned by transfected cells were then analyzed for both tPA antigen and activity. Analogs studied thus far include the full-length molecule FGK1K2P, GK1K2P, FK1K2P, FGK2P, FGK1P, FGK2K1P, and FK2P. In each case, samples of conditioned medium contained from 100 to 200 ng of tPA-like material per ml. Based on active-site titration of immunopurified analogs with 3H-DFP and assessment of tPA activity in the presence of CNBr-digested fibrinogen, the specific activities of analogs containing the K2 domain adjacent to the P domain were similar to that of native full-length tPA. In contrast, the specific activities of analogs with the K2 domain deleted (FGK1P) or transposed (FGK2K1P) were significantly reduced, indicative of the decreased ability of the fibrinogen fragments to enhance their respective activities. The extent of neutralization of the activity of each analog by platelet-derived PA inhibitor appeared to be similar to that of full-length tPA, confirming that the P domain contains the primary site of interaction between tPA and inhibitor. These data suggest that not only the presence of but also the position of the K2 domain are important for proper expression of tPA's activity.
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9

Yamada, Toru, Anurag Kumar, Yutaka Asako, and Mohammad Faghri. "Forced Convection Heat Transfer Simulation Using Dissipative Particle Dynamics With Energy Conservation." In ASME 2011 International Mechanical Engineering Congress and Exposition. ASMEDC, 2011. http://dx.doi.org/10.1115/imece2011-63773.

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Dissipative particle dynamics (DPD) with energy conservation was applied to simulate forced convection in parallel-plate channels with boundary conditions of constant wall temperature (CWT) and constant wall heat flux (CHF). DPD is a coarse-grained version of molecular dynamics. An additional governing equation for energy conservation was solved along with conventional DPD equations where inter-particle heat flux accounts for changes in mechanical and internal energies when particles interact with surrounding particles. The solution domain was considered to be two-dimensional with periodic boundary condition in the flow direction. Additional layers of particles on top and bottom of the channel were utilized to apply no-slip velocity and temperature boundary conditions. The governing equations for energy conservation were modified based on periodic fully developed velocity and temperature conditions. The results were shown via velocity and temperature profiles across the channel cross section. The Nusselt numbers were calculated from the temperature gradient at the wall using a second order accurate forward difference approximation. The results agreed well with the exact solutions to within 2.3%.
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Han, Chungmin, and Jaesung Park. "Size Based Particle Separation Method by Zero Diffusivity." In ASME 2011 Summer Bioengineering Conference. American Society of Mechanical Engineers, 2011. http://dx.doi.org/10.1115/sbc2011-53393.

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Separation is one of the most basic and frequently using techniques for biological research. Researchers have been using gel-electrophoresis for DNA separation and also using various chromatography techniques for protein and bio-molecule separations. Recently, as micro and nano fabrication techniques have developed, interest in miniaturized micro scale biology research tools has also increased. According to this trend, micro scale devices for separating various sized of particles such as cells, organelles, proteins, lipids and vesicles play an important role in a total system. Therefore, separation devices based on various methods are suggested. Widely used separation methods for micro devices are electro-kinetics with special channel geometries and laminar flow control. In electro-kinetic methods, micro channel electrophoresis and DEP (dielectrophoresis) are commonly used.[1] These separation methods, however, can only be used in very narrow range because their working conditions, high voltage and charge dependence, are not compatible with many biomaterials.
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Reports on the topic "DPP based molecules"

1

Jelinek, Raz, Paul Dawson, Timothy Hanks, William Pennington, and Julie Northcutt. Bacterial sensors for food processing environments. United States Department of Agriculture, January 2013. http://dx.doi.org/10.32747/2013.7598157.bard.

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The overall objective of this project was to develop a new bacterial contaminant sensor based upon polydiacetylene(PDA) which is a unique polymer that changes color and configuration in response to external molecular stimuli. While this polymer has been well studied and has been shown to respond to bacterial stimuli in the laboratory, application to food processing environments has not been demonstrated. One hurdle in the application of biosensors in a food processing environment is interference of food sanitizers with the detection of bacteria. Common food sanitizers were evaluated for their response to PDA and different concentrations paving the way for use of modified PDAs developed by the research team to be used in food plants. Further development of PDA bacterial sensors focused on simplifying its application by immobilizing PDA on cotton and paper for use on swabs, wipes and dip papers. Increasing the sensitivity of PDAs was investigated by attaching fluorophores. Future and continued work will include the decoration of PDAs with apatmers to improve the specificity of the biosensor to food pathogens.
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