المؤلفون: Li, Sichao, Hammond, Oliver S., Nelson, Andrew, de Campo, Liliana, Moir, Michael, Recsei, Carl, Shimpi, Manishkumar R., Glavatskih, Sergei, Pilkington, Georgia A., Mudring, Anja-Verena, Rutland, Mark W., Professor

المصدر: Journal of Physical Chemistry B. 128(17):4231-4242

مصطلحات موضوعية: Additives, Aspect ratio, Ion exchange, Negative ions, Neutron scattering, Positive ions, anion, boric acid, cation, ionic liquid, lauric acid, lubricating agent, nanomaterial, solvent, Bio-degradable oil, Control structure, High aspect ratio, Laurate, Nanoscale structure, Neutron reflectivity, Oxalato, Self-assembly structure, Small-angle neutron scattering, Tubulars, article, controlled study, geometry, ion exchange, liquid, neutron scattering, nonhuman, Ionic liquids

الوصف: Three nonhalogenated ionic liquids (ILs) dissolved in 2-ethylhexyl laurate (2-EHL), a biodegradable oil, are investigated in terms of their bulk and electro-interfacial nanoscale structures using small-angle neutron scattering (SANS) and neutron reflectivity (NR). The ILs share the same trihexyl(tetradecyl)phosphonium ([P6,6,6,14]+) cation paired with different anions, bis(mandelato)borate ([BMB]−), bis(oxalato)borate ([BOB]−), and bis(salicylato)borate ([BScB]−). SANS shows a high aspect ratio tubular self-assembly structure characterized by an IL core of alternating cations and anions with a 2-EHL-rich shell or corona in the bulk, the geometry of which depends upon the anion structure and concentration. NR also reveals a solvent-rich interfacial corona layer. Their electro-responsive behavior, pertaining to the structuring and composition of the interfacial layers, is also influenced by the anion identity. [P6,6,6,14][BOB] exhibits distinct electroresponsiveness to applied potentials, suggesting an ion exchange behavior from cation-dominated to anion-rich. Conversely, [P6,6,6,14][BMB] and [P6,6,6,14][BScB] demonstrate minimal electroresponses across all studied potentials, related to their different dissociative and diffusive behavior. A mixed system is dominated by the least soluble IL but exhibits an increase in disorder. This work reveals the subtlety of anion architecture in tuning bulk and electro-interfacial properties, offering valuable molecular insights for deploying nonhalogenated ILs as additives in biodegradable lubricants and supercapacitors.

وصف الملف: electronic

الوصول الحر: https://urn.kb.se/resolve?urn=urn:nbn:se:ri:diva-73270Test
https://doi.org/10.1021/acs.jpcb.3c08189Test
https://ri.diva-portal.org/smash/get/diva2:1864637/FULLTEXT01.pdfTest

المؤلفون: Xin Zhao, Jianhua Shi, Ligang Wu, Fukang Ma, Zhandong Zhang

المصدر: Energy Science & Engineering, Vol 11, Iss 12, Pp 4520-4541 (2023)

مصطلحات موضوعية: coordination evaluation, improved AHP, main bearing assembly structure, matching design, multiobjective optimization, Technology, Science

الوصف: Abstract The main bearing assembly structure is one of the most important main load‐bearing structures of a diesel engine. The working loads of this structure increases dramatically with the increase of the power density of diesel engines, resulting in the problem of unsatisfactory reliability coordination design in restricted design space, while the mechanisms for coordinated design are still at the blank stage. Aiming at the problem, a multilevel multiobjective coordination matching design technique is innovatively proposed in this paper. This technique is characterized by a multilevel multiobjective coordination evaluation system for the assembly structure and its components based on the improved analytic hierarchy process. The finite element model and mathematical model of the main bearing assembly structure are established to realize the joint of finite element technology and optimization technology for coordination matching design. By carrying out verification experiments, the strength coordination, deformation coordination and contact strength coordination of the assembly structure increase by 13.91%, 14.96%, and 2.63%, respectively, after matching design, while the mass coordination remains almost constant meeting the lightweight design requirements. The overall coordination of the main bearing assembly structure is improved by 11.10%, achieving the goal of matching design of the main bearing assembly structure. The results show that the coordination evaluation system can quantitatively characterize the coordination relationship of the assembly structure and the multi‐reliability of components, and it is a feasible coordination evaluation method. The demonstrated coordination evaluation system and coordination matching design modeling approach provide important theoretical guidance for the matching design of complex assembly structures.

وصف الملف: electronic resource

العلاقة: https://doaj.org/toc/2050-0505Test

الوصول الحر: https://doaj.org/article/a4da8df37ec94aca90b3699f47292006Test

المؤلفون: Hongliang Ye, Jiale Sui, Jinqiu Wang, Yi Wang, Di Wu, Beibei Wang, Fang Geng

المصدر: Poultry Science, Vol 102, Iss 7, Pp 102696- (2023)

مصطلحات موضوعية: egg yolk, yolk granule, assembly structure, pH, ultrasonic, Animal culture, SF1-1100

الوصف: ABSTRACT: Chicken egg yolk granule is a natural micro–nano aggregate in egg yolk, and its assembly structure varies under different processing conditions. In this study, the effects of NaCl concentration, pH, temperature, and ultrasonic treatment on the properties and microstructure of yolk granule were determined. The results showed that ionic strength (above 0.15 mol/L), alkaline environment (pH 9.5 and 12.0), and ultrasonic treatment induced the depolymerization of egg yolk granule; while freezing-thawing, heat treatment (65°C, 80°C, and 100°C), and mild acidic pH (pH 4.5) induced the aggregation of yolk granule. Scanning electron microscopy observation showed the assembly structure of yolk granule varied with different treatment conditions and confirmed the aggregation-depolymerization of yolk granule under different conditions. Correlation analysis showed that turbidity and average particle size are the 2 most critical indicators that can reflect the aggregation structure of yolk granule in solution. The results are important for understanding the changing mechanism of yolk granule during processing, and provide important information for the applications of yolk granule.

وصف الملف: electronic resource

العلاقة: http://www.sciencedirect.com/science/article/pii/S0032579123002183Test; https://doaj.org/toc/0032-5791Test

الوصول الحر: https://doaj.org/article/2503ab678cbb49918d8223de38ea6a3bTest

المؤلفون: Tomoshi MIYAMURA, Yu-ki YANO, 宮村 倫司, 矢野 友貴

المصدر: 日本計算工学会論文集 / Transactions of the Japan Society for Computational Engineering and Science. 2023, 2023:20230005

المؤلفون: Xin Zhao, Tiexiong Su, Xiaoyong Liu, Xueqing Zhang

المصدر: Energy Science & Engineering, Vol 10, Iss 1, Pp 43-63 (2022)

مصطلحات موضوعية: improved NSGA‐II, main bearing assembly structure, multi‐objective optimization, out‐of‐roundness, reliability analysis, Technology, Science

الوصف: Abstract Multi‐objective optimization of the main bearing assembly structure entails a high computational cost; moreover, the experimental measurement of the main‐bearing‐hole out‐of‐roundness has the problem of poor accuracy and inadequate repeatability. To address these issues, an improved NSGA‐II algorithm based on the fixed‐sized candidate set adaptive random testing (FSCS‐ART) algorithm and an adaptive strategy is proposed, and a more accurate method for measuring out‐of‐roundness based on the compensation method is developed. Accordingly, a mathematical model and a parametric model are established for optimization. Finally, the optimal design scheme is obtained by solving with the improved NSGA‐II algorithm. The results show that the proposed out‐of‐roundness measurement method has a high accuracy, with

وصف الملف: electronic resource

العلاقة: https://doaj.org/toc/2050-0505Test

الوصول الحر: https://doaj.org/article/d3882efff3a94d6d8e84ac118b5fd528Test

المؤلفون: Ta-Chou Huang, Wolfgang B. Fischer

المصدر: Biomolecules, Vol 12, Iss 12, p 1844 (2022)

مصطلحات موضوعية: assembly structure prediction, viral membrane proteins, transmembrane domain, docking, peptide screening, molecular dynamics simulations, Microbiology, QR1-502

الوصف: A de novo assembly algorithm is provided to propose the assembly of bitopic transmembrane domains (TMDs) of membrane proteins. The algorithm is probed using, in particular, viral channel forming proteins (VCPs) such as M2 of influenza A virus, E protein of severe acute respiratory syndrome corona virus (SARS-CoV), 6K of Chikungunya virus (CHIKV), SH of human respiratory syncytial virus (hRSV), and Vpu of human immunodeficiency virus type 2 (HIV-2). The generation of the structures is based on screening a 7-dimensional space. Assembly of the TMDs can be achieved either by simultaneously docking the individual TMDs or via a sequential docking. Scoring based on estimated binding energies (EBEs) of the oligomeric structures is obtained by the tilt to decipher the handedness of the bundles. The bundles match especially well for all-atom models of M2 referring to an experimentally reported tetrameric bundle. Docking of helical poly-peptides to experimental structures of M2 and E protein identifies improving EBEs for positively charged (K,R,H) and aromatic amino acids (F,Y,W). Data are improved when using polypeptides for which the coordinates of the amino acids are adapted to the Cα coordinates of the respective experimentally derived structures of the TMDs of the target proteins.

وصف الملف: electronic resource

العلاقة: https://www.mdpi.com/2218-273X/12/12/1844Test; https://doaj.org/toc/2218-273XTest

الوصول الحر: https://doaj.org/article/a1dc6ddb45c6421290c5330ac5c7c192Test

المؤلفون: Vijay B. Tatipamde, and Dr.Vilas M. Nandedkar

المصدر: International Journal of Computer-Aided technologies (IJCAx) 3(2/3) 29

مصطلحات موضوعية: Workflow, Change Management, Custom-handlers, Teamcenter Unified, Assembly Structure, EBOM

الوصف: A large no. of automobile companies finding a convinient way to manage design changes with the use of various PLM techniques. Change in any product is something that should occur on timely basis to match up with customer requirement and cost reduction. The change made in the vehicle designs directly affects various concerned agencies. Automobile Vehicle structures contains thousands of parts and if there is any change is occurring in child parts then it becomes important to track that impacted part, propose a solution on that part and release a new assembly structure with feasible changes such that all efforts need to be done for cost reduction.

العلاقة: https://zenodo.org/record/7254020Test; https://doi.org/10.5281/zenodo.7254020Test; oai:zenodo.org:7254020

الإتاحة: https://doi.org/10.5281/zenodo.7254020Test
https://doi.org/10.5281/zenodo.7254019Test
https://zenodo.org/record/7254020Test

المؤلفون: Thi-Thuy Duong Pham (14309166), Seung-Jin Jung (7047299), Chang-Mok Oh (3947024), Jin-Kyoung Yang (830363), Dabin Lee (4357828), Alemayehu Kidanemariam (11797563), Arbanah Muhammad (14309169), Sehoon Kim (830364), Tae Joo Shin (1439908), JaeHong Park (5614484), In-Wook Hwang (1586077), Juhyun Park (626961)

مصطلحات موضوعية: Biophysics, Biochemistry, Medicine, Pharmacology, Biotechnology, Cancer, Plant Biology, Computational Biology, Chemical Sciences not elsewhere classified, Physical Sciences not elsewhere classified, separated film assemblies, optical band gap, internal conversion mechanism, 13 ps ), photodynamic capabilities according, better photodynamic effect, disordered structure generated, stronger photothermal effect, gap law ’, assembly structure order, conjugated polymer nanoparticles, disordered structure, conjugated polymer, photodynamic properties, ordered assembly, assembly structures, conjugated peg, conjugated backbones, surface conjugation, singlet oxygen

الوصف: We report that conjugated polymer nanoparticles (CPNs) coated with polyethylene glycols (PEGs) exhibit photothermal and photodynamic capabilities according to molecular ordering in their assembly structures. CPN-PEGs were made using three different methods: a dispersion process of phase-separated film assemblies of a conjugated polymer and a phospholipid-conjugated PEG (CPN-I), a dispersion process of a conjugated polymer and a phospholipid followed by surface conjugation with PEGs (CPN-II), and a miniemulsification of the conjugated polymer and the phospholipid-conjugated PEG. Our findings revealed that the ordered molecular assembly structures in CPN-I and CPN-II increased intermolecular interactions and decreased the optical band gap, promoting nonradiative exciton relaxation via the energy-gap law’s internal conversion mechanism and rationalizing CPN-I’s shorter singlet exciton lifetime (13 ps). Meanwhile, CPN-III with a disordered structure generated more singlet oxygen than CPN-I and CPN-II, indicating increased triplet exciton generation upon the polaron recombination. Our findings present that the photothermal and photodynamic properties of CPNs are obviously dependent on the assembly structure order and that CPNs with an ordered assembly of conjugated backbones have a stronger photothermal effect, whereas those with a disordered structure have a better photodynamic effect.

العلاقة: https://figshare.com/articles/journal_contribution/Conjugated_Polymer_Nanoparticles_Photothermal_and_Photodynamic_Capabilities_According_to_Molecular_Ordering_in_Their_Assembly_Structures/21789894Test

الإتاحة: https://doi.org/10.1021/acs.macromol.2c01815.s001Test

المؤلفون: Nicolas-Boluda, A., Yang, Z., Dobryden, Illia, Carn, F., Winckelmans, N., Péchoux, C., Bonville, P., Bals, S., Claesson, Per M, Gazeau, F., Pileni, M. P.

المصدر: Advanced Functional Materials. 30(40)

مصطلحات موضوعية: artificial colloidal crystals, intracellular fate, magnetic manipulation, nano-biointeractions, nanocrystal self-assembly, Biological membranes, Biomechanics, Cells, Cytology, Hydrophilicity, Hydrophobicity, Nanocrystals, Self assembly, Topology, Tumors, Building blockes, Cellular uptake, Hydrophilic nanocrystals, Hydrophobic nanocrystals, Self-assembly structure, Structural organization, Topological properties, Water dispersible, Sols

الوصف: Control of interactions between nanomaterials and cells remains a biomedical challenge. A strategy is proposed to modulate the intralysosomal distribution of nanoparticles through the design of 3D suprastructures built by hydrophilic nanocrystals (NCs) coated with alkyl chains. The intracellular fate of two water-dispersible architectures of self-assembled hydrophobic magnetic NCs: hollow deformable shells (colloidosomes) or solid fcc particles (supraballs) is compared. These two self-assemblies display increased cellular uptake by tumor cells compared to dispersions of the water-soluble NC building blocks. Moreover, the self-assembly structures increase the NCs density in lysosomes and close to the lysosome membrane. Importantly, the structural organization of NCs in colloidosomes and supraballs are maintained in lysosomes up to 8 days after internalization, whereas initially dispersed hydrophilic NCs are randomly aggregated. Supraballs and colloidosomes are differently sensed by cells due to their different architectures and mechanical properties. Flexible and soft colloidosomes deform and spread along the biological membranes. In contrast, the more rigid supraballs remain spherical. By subjecting the internalized suprastructures to a magnetic field, they both align and form long chains. Overall, it is highlighted that the mechanical and topological properties of the self-assemblies direct their intracellular fate allowing the control intralysosomal density, ordering, and localization of NCs.

وصف الملف: print

الوصول الحر: https://urn.kb.se/resolve?urn=urn:nbn:se:ri:diva-46835Test
https://doi.org/10.1002/adfm.202004274Test

المؤلفون: Wei Zou

المصدر: Jixie chuandong, Vol 43, Pp 126-130 (2019)

مصطلحات موضوعية: Gearbox, Strength of assembly structure, Structure of planet carrier and pin, Mechanical engineering and machinery, TJ1-1570

الوصف: Taking the external load distribution on sprocket wheel and meshing forces of planetary gear trains into account， the strength of case and the three-stage planet carrier assembly under three working conditions is analyzed by using Abaqus， comparison and analysis of three solutions of planet carrier and pins structure is carried out， and the accuracy of the FEA result is confirmed， which provides the basis for subsequent design and manufacture.

وصف الملف: electronic resource

العلاقة: http://www.jxcd.net.cn/thesisDetails#10.16578/j.issn.1004.2539.2019.05.024Test; https://doaj.org/toc/1004-2539Test

الوصول الحر: https://doaj.org/article/63c8e911a55d4e3eb951ffb22187bdb0Test