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Polyhydroxyurethanes from Biobased Monomers and CO_(2):A Bridge between Sustainable Chemistry and CO_(2) Utilization

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Chinese Journal of Chemistry 2024年第6期42卷 652-685页

作者： Tharinee Theerathanagorn tanika Kessaratikoon Hafeez Ur Rehman Valerio D'Elia Daniel Crespy VISTEC Advanced Laboratory for Environment-Related Inorganic and Organic Syntheses Department of Materials Science and EngineeringVidyasirimedhi Institute of Science and Technology21210Wang ChanRayongThailand Department of Materials Science and Engineering Vidyasirimedhi Institute of Science and Technology21210Wang ChanRayongThailand

Polyhydroxyurethanes(PHUs)have received considerable attention in the last decade as potential alternatives to traditional phosgene-based polyurethanes(PUs).The development of suitable 5CC(five membered-ring cyclic carbonate)precursors bearing multiple carbonate moieties(multi-5CCs)is a key requisite for preparing PHUs by polyaddition reaction with bis-or *** sustainable PHUs from CO_(2)-based five-membered cyclic carbonates(5CCs)obtained from biobased epoxides is a valuable strategy to bridge CO_(2) utilization and the upcycling of renewable *** this context,while many multi-5CC monomers reported in the literature are oil-based,recent efforts have led to the development of a large variety of multifunctional 5CCs that are produced by the combination of CO_(2) and renewable resources such as fatty acids and vegetable oils,lignin,terpenes,and *** this work,recent crucial advances(2019—2023)on PHUs prepared from bis-and multi-5CCs produced from CO_(2) and(partially/potentially)biobased substrates are reviewed with respect to their synthesis,thermal and mechanical properties,and their recent,emerging applications.

关键词： CO_(2) conversion Polyhydroxyurethanes Cyclic carbonates Biobased compounds Fatty acids Functional polymers Monomers Renewable resources

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Bio-friction

Friction 2013年第2期1卷 100-113页

作者： Zhongmin JIN duncan DOWSON School of Mechanical Engineering Xi’an Jiaotong UniversityChina School of Mechanical Engineering University of LeedsUK

Friction studies in biological systems are reviewed,including synovial joints(cartilage,meniscus),eye,pleurae,fat pad,skin,and oral cavity as well as daily activities associated with shaving,brushing,slip,*** natural systems and medical interventions in terms of diagnoses and artificial replacements are *** relevant biomechanical,physiological,and anatomical factors are reviewed in conjunction with friction studies in terms of both methodologies and friction *** underlying tribological mechanisms related to friction are briefly discussed.A unified view on the lubrication mechanism responsible for the low friction in most soft biological tissues is presented.

关键词： biofriction soft tissues friction

Characterizing prediction errors of a new tree height model for cut-to-length Pinus radiata stems through the Burr TypeⅫdistribution

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Journal of Forestry Research 2023年第6期34卷 1899-1914页

作者： Xinyu Cao Huiquan Bi duncan Watt Yun Li School of Information Science and Technology Beijing Forestry UniversityBeijing 100083People’s Republic of China Forest Science NSW Department of Primary IndustriesLevel 304PSQParramattaNSW 2150Australia School of Ecosystem and Forest Sciences Faculty of ScienceThe University of MelbourneWater StreetCreswickVIC 3363Australia Snowy Region Forestry Corporation of NSW76 Capper StreetTumutNSW 2720Australia

Unlike height-diameter equations for standing trees commonly used in forest resources modelling,tree height models for cut-to-length(CTL)stems tend to produce prediction errors whose distributions are not conditionally normal but are rather leptokurtic and *** feature was merely noticed in previous studies but never thoroughly *** study characterized the prediction error distribution of a newly developed such tree height model for Pin us radiata(***)through the three-parameter Burr TypeⅫ(BⅫ)*** model’s prediction errors(ε)exhibited heteroskedasticity conditional mainly on the small end relative diameter of the top log and also on DBH to a minor *** serial correlations were also present in the data.A total of 14 candidate weighting functions were compared to select the best two for weightingεin order to reduce its conditional *** weighted prediction errors(εw)were shifted by a constant to the positive range supported by the BXII *** the distribution of weighted and shifted prediction errors(εw+)was characterized by the BⅫdistribution using maximum likelihood estimation through 1000 times of repeated random sampling,fitting and goodness-of-fit testing,each time by randomly taking only one observation from each tree to circumvent the potential adverse impact of serial correlation in the data on parameter estimation and *** nonparametric two sample Kolmogorov-Smirnov(KS)goodness-of-fit test and its closely related Kuiper’s(KU)test showed the fitted BⅫdistributions provided a good fit to the highly leptokurtic and heavy-tailed distribution ofε.Random samples generated from the fitted BⅫdistributions ofεw+derived from using the best two weighting functions,when back-shifted and unweighted,exhibited distributions that were,in about97 and 95%of the 1000 cases respectively,not statistically different from the distribution ofε.Our results for cut-tolength *** stems repre

关键词： Conditional heteroskedasticity Leptokurtic error distribution Skedactic function Nonlinear quantile regression Weighted prediction errors Serial correlation Random sampling and fitting Nonparametric goodnessof-fit tests

COVID-19 in 2021:A Call for Collaboration

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China CDC weekly 2021年第7期3卷 130-131页

作者： duncan Selbie National Public Health Institutes

For many years now the world has anticipated a global *** of the devastating impact of pandemic influenza after the first World War,we have been awaiting a similar threat and the changes it would bring to our way of l... 详细信息

关键词： threat has devastating

Monitoring film coalescence from aqueous polymeric dispersions using atomic force microscopy: Surface topographic and nano-adhesion studies

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Asian Journal of Pharmaceutical Sciences 2020年第1期15卷 104-111页

作者： Ziyi Yang duncan QMCraig School of Pharmaceutical Science Jiangnan University1800 Lihu RoadWuxi 214122China UCL School of Pharmacy 29-39 Brunswick SquareLondon WC1N1AXUK

The aim of the investigation was to develop the use of topographic and nano-adhesion atomic force microscopy(AFM) studies as a means of monitoring the coalescence of latex particles within films produced from a pharmaceutically relevant aqueous dispersion(Eudragit~?NE30 D). Films were prepared via spin coating and analysed using AFM, initially via tapping mode for topographic assessment followed by force-distance measurements which allowed assessment of site-specific adhesion. The results showed that colloidal particles were clearly observed topographically in freshly prepared samples, with coalescence detected on curing via the disappearance of discernible surface features and a decrease in roughness indices. The effects of temperature and humidity on film curing were also studied, with the former having the most pronounced effect. AFM force measurements showed that the variation in adhesive force reduced with increasing curing time, suggesting a novel method of quantifying the rate of film formation upon curing. It was concluded that the AFM methods outlined in this study may be used as a means of qualitatively and quantitatively monitoring the curing of pharmaceutical films as a function of time and other variables, thereby facilitating rational design of curing protocols.

关键词： Film curing Atomic force microscopy Spin coating Aqueous dispersion AFM pull-off force measurement

Astaxanthin Accumulation in the Green Alga Haematococcus pluvialis： Effects of Cultivation Parameters

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Journal of Integrative Plant Biology 2007年第4期49卷 447-451页

作者： Ping He James duncan James Barber Institute of Botany the Chinese Academy of Sciences Beijing 100093 China Division of Molecular Biosciences Imperial College London London SW7 2AY UK Graduate School of Beijing Forestry University Beijing 100083 China

The green alga, Haematococcus pluvlalis Flotow is used as a source of the ketocarotenoid astaxanthin for application in fish aquaculture, pharmaceutical and cosmetic industries. Ceils of the green alga were induced by the application of different light and starvation conditions to evaluate the effect in astaxanthin accumulate. The conditions used for the Induction were high light intensity （170 μmol·m^-2·s^-1）, iron starvation, sulfur starvation and phosphate starvation. The results show that stresses applied in culture, which interfere with cell division, trigger the accumulation of astaxanthin. Notably, sulfur starvation results in a massive accumulation of this commercially important carotenoid.

关键词： astaxanthin Haematococcus pluvialis iron light phosphate stress sulfur.

Translation Studies versus Comparative Literature？

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Fudan Journal of the Humanities and Social Sciences 2015年第3期8卷 347-354页

作者： duncan Large British Centre for Literary Translation University of East Anglia Norwich NR4 7TJ UK

Comparative literature is one of the main disciplines out of which translation studies emerged, so it is hardly surprising if at times the relationship between the two subjects has been marked by antagonism. Comparative literary scholars, in particular--perennially anxious about the status of comparative lit- erature itself have argued that their discipline has been subsumed and superseded by translation studies. Yet in recent decades, the two subject areas have also been growing further apart, to the extent that Susan Bassnett, one of the key proponents of the antagonistic view, has modified her stance and argued instead for a rap- prochement between the two under the heading of intercultural studies.

关键词： Translation Comparative literature Susan Bassnett Intercultural studies

SYNGR4 and PLEKHB1 deregulation in motor neurons of amyotrophic lateral sclerosis models: potential contributions to pathobiology

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Neural Regeneration Research 2022年第2期17卷 266-270页

作者： Rita F.Marques Kent E.duncan Institute for Biochemistry and Molecular Biology Department of ChemistryUniversity of HamburgHamburgGermany Neuronal Translational Control Research Group Center for Molecular Neurobiology Hamburg(ZMNH)University Medical Center Hamburg-EppendorfHamburgGermany

Amyotrophic lateral sclerosis is the most common adult-onset neurodegenerative disease affecting motor neurons. Its defining feature is progressive loss of motor neuron function in the cortex, brainstem, and spinal cord, leading to paralysis and death. Despite major advances in identifying genes that can cause disease when mutated and model the disease in animals and cellular models, it still remains unclear why motor symptoms suddenly appear after a long pre-symptomatic phase of apparently normal function. One hypothesis is that age-related deregulation of specific proteins within key cell types, especially motor neurons themselves, initiates disease symptom appearance and may also drive progressive degeneration. Genome-wide in vivo cell-type-specific screening tools are enabling identification of candidates for such proteins. In this minireview, we first briefly discuss the methodology used in a recent study that applied a motor neuron-specific RNASeq screening approach to a standard model of TAR DNA-binding protein-43(TDP-43)-driven amyotrophic lateral sclerosis. A key finding of this study is that synaptogyrin-4 and pleckstrin homology domain-containing family B member 1 are also deregulated at the protein level within motor neurons of two unrelated mouse models of mutant TDP-43 driven amyotrophic lateral sclerosis. Guided by what is known about molecular and cellular functions of these proteins and their orthologs, we outline here specific hypotheses for how changes in their levels might potentially alter cellular physiology of motor neurons and detrimentally affect motor neuron function. Where possible, we also discuss how this information could potentially be used in a translational context to develop new therapeutic strategies for this currently incurable, devastating disease.

关键词： amyotrophic lateral sclerosis glucagon-like peptide-1 receptor motor neuron disease mouse model neurodegeneration phosphatidylserine pleckstrin homology domain synaptogyrin TAR DNA-binding protein-43 vesicle transport

Identity-based aggregate signcryption in the standard model from multilinear maps

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Frontiers of Computer Science 2016年第4期10卷 741-754页

作者： Hao WANG Zhen LIU Zhe LIU duncan S. WONG School of Information Science and Engineering Shandong Normal University Jinan 250014 China Shandong Provincial Key Labe ratory for Novel Distributed Computer Software Technology Jinan 250014 China Security and Data Sciences Hong Kong Applied Science and Technology Research Institute (ASTRI) Hong Kong China Laboratory of Algorithmics Cryptology and Security (LACS) University of Luxembourg Luxembourg L-1359 Luxembourg

Signcryption is a public key cryptographic method that achieves unforgeability and confidentiality simultaneously with significantly smaller overhead than that required by ＂digital signature followed by public key encryption＂. It does this by signing and *** a message in a single step. An aggregate signcryption scheme allows individual signcryption ciphertexts intended for the same recipi- ent to be aggregated into a single （shorter） combined ciphertext without losing any of the security guarantees. We present an aggregate signcryption scheme in the identity-based setting using multilinear maps, and provide a proof of security in the standard model. To the best of our knowledge, our new scheme is the first aggregate signcryption scheme that is secure in the standard model.

关键词： identity-based aggregate signcryption multilinear maps standard model GGH framework