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Full-Text Articles in Social and Behavioral Sciences
Synthesis Of Mn3o4-Encapsulated Graphene Sheet Nanocomposites Via A Facile, Fast Microwave Hydrothermal Method And Their Supercapacitive Behaviour, Li Li, Kuok Hau Seng, Zhixin Chen, Hua-Kun Liu, Ivan P. Nevirkovets, Zaiping Guo
Synthesis Of Mn3o4-Encapsulated Graphene Sheet Nanocomposites Via A Facile, Fast Microwave Hydrothermal Method And Their Supercapacitive Behaviour, Li Li, Kuok Hau Seng, Zhixin Chen, Hua-Kun Liu, Ivan P. Nevirkovets, Zaiping Guo
Faculty of Engineering and Information Sciences - Papers: Part A
Well-crystallized Mn3O4-anchored reduced graphene oxide (rGO) nanocomposites have been successfully synthesized via a facile, effective, energy-saving, and scalable microwave hydrothermal technique for potential application as supercapacitor material. Integrating these nanostructures resulted in a strong synergistic effect between the two materials, consequently leading to a hybrid composite with higher specific capacitance compared to the bare Mn3O4 nanoparticles. The results from different sorts of characterization indicate that the Mn3O4 particles were deposited and anchored on graphene sheets. The capacitance value of the rGO(31.6%)–Mn3O4 nanocomposite reached 153 F/g, much higher than that of the bare Mn3O4 (87 F/g) at a scan rate of …
High-Yield Cell-Free Protein Synthesis For Site-Specific Incorporation Of Unnatural Amino Acids At Two Sites, Kiyoshi Ozawa, Karin V. Loscha, Kekini V. Kuppan, Choy Theng Loh, Nicholas E. Dixon, Gottfried Otting
High-Yield Cell-Free Protein Synthesis For Site-Specific Incorporation Of Unnatural Amino Acids At Two Sites, Kiyoshi Ozawa, Karin V. Loscha, Kekini V. Kuppan, Choy Theng Loh, Nicholas E. Dixon, Gottfried Otting
Faculty of Science - Papers (Archive)
Using aminoacyl-tRNA synthetase/suppressor tRNA pairs derived from Methanocaldococcus jannaschii, an Escherichia coli cell-free protein production system affords proteins with site-specifically incorporated unnatural amino acids (UAAs) in high yields through the use of optimized amber suppressor tRNACUA opt and optimization of reagent concentrations. The efficiency of the cell-free system allows the incorporation of trifluoromethyl-phenylalanine using a polyspecific synthetase evolved previously for p-cyanophenylalanine, and the incorporation of UAAs at two different sites of the same protein without any re-engineering of the E. coli cells used to make the cell-free extract.
A Synthesis Of A Knowledge Management Framework For Sports Event Management, Azizul Rahman Abdul Ghaffar, Ghassan Beydoun, Jun Shen, Will Tibben, Dongming Xu
A Synthesis Of A Knowledge Management Framework For Sports Event Management, Azizul Rahman Abdul Ghaffar, Ghassan Beydoun, Jun Shen, Will Tibben, Dongming Xu
Faculty of Engineering and Information Sciences - Papers: Part A
Due to rapid social development in Asia, sports events have grown larger and many new countries are also hosting them for their first time. In addition to required increase in expenditures and more efficient management, various instances of inadequate planning highlighted the needs for more effective and better sustainable structures to support knowledge transfer between organizers, from one event to the next. The research presented in this paper aims to facilitate the deployment of systematic knowledge management practices to sports event management, to enable sustainable planning. The research in this paper synthesizes is carried out on the Malaysian Games as …
Model Studies Towards The Total Synthesis Of The Stemona Alkaloid 1-Hydroxyprotostemonine: Synthesis Of Ent-1-Hydroxystemoamide, Nalivela Kumara Swamy, Stephen G. Pyne
Model Studies Towards The Total Synthesis Of The Stemona Alkaloid 1-Hydroxyprotostemonine: Synthesis Of Ent-1-Hydroxystemoamide, Nalivela Kumara Swamy, Stephen G. Pyne
Faculty of Science, Medicine and Health - Papers: part A
As part of a model study towards the total synthesis of Stemona alkaloid 1-hydroxyprotostemonine 1, we have achieved the synthesis an A-B-C ring precursor, ent-1-hydroxystemoamide. Key steps involve an ene-yne RCM reaction and a diastereoselective dihydroxylation-lactonization reaction.
Synthesis Of Spirocyclic Azacycles From The Cyclization Of Furan Tethered N-Acyliminium Ions, Sudhir R. Shengule, Anthony Willis, Stephen G. Pyne
Synthesis Of Spirocyclic Azacycles From The Cyclization Of Furan Tethered N-Acyliminium Ions, Sudhir R. Shengule, Anthony Willis, Stephen G. Pyne
Faculty of Science, Medicine and Health - Papers: part A
The protic and Lewis acid promoted cyclization reactions of tethered furan-4,5-dihydroxypiperid-2-ones, furan-4,5-diacetoxypiperid-2-ones and furan-3,4-diacetoxypyrrolid-2-ones, via their corresponding N-acyliminium ion intermediates, have been studied. In the case of the furan-4,5-dihydroxypiperid-2-one 2a and its diacetate derivative 2b, macrocyclic products were formed from an initial intermolecular reaction between 2a or 2b, via the nucleophilic C5 furan carbon, and their corresponding N-acyliminium ion intermediates. When the furan C5 position of 2b was blocked by substitution with bromine then TFA or Sc(OTf)3 catalysed cyclization reactions gave a spirotricyclic product (a 5-6-6-tricycle) in a highly diastereoselective manner. Cyclization of the analogous C5-Br-furan-pyrrolidone 29 with TFA resulted …
Isolation, Biological Activities, And Synthesis Of The Natural Casuarines, Thunwadee Ritthiwigrom, Stephen G. Pyne
Isolation, Biological Activities, And Synthesis Of The Natural Casuarines, Thunwadee Ritthiwigrom, Stephen G. Pyne
Faculty of Science, Medicine and Health - Papers: part A
This chapter describes the isolation, structure elucidation, glycosidase inhibitory activities, and the synthesis of the four naturally occurring casuarines. These are casuarine, casuarine-6-O-α-d-glucoside, 6-epi-casuarine (uniflorine A), and 3-epi-casuarine.
The Synthesis, Structures And Reactions Of Zinc And Cobalt Metal-Organic Frameworks Incorporating An Alkyne-Based Dicarboxylate Linker, Andrew D. Burrows, L C. Fisher, David M. Hodgson, Mary F. Mahon, Naomi Cessford, Tina Duren, Christopher Richardson, S P. Rigby
The Synthesis, Structures And Reactions Of Zinc And Cobalt Metal-Organic Frameworks Incorporating An Alkyne-Based Dicarboxylate Linker, Andrew D. Burrows, L C. Fisher, David M. Hodgson, Mary F. Mahon, Naomi Cessford, Tina Duren, Christopher Richardson, S P. Rigby
Faculty of Science - Papers (Archive)
The reaction of zinc(II) nitrate and 4,4′-ethynylenedibenzoic acid (H2edb) in DMF at 80 °C gave the metal–organic framework material [Zn4O(edb)3(H2O)2]·6DMF 1 in which edb ligands connect Zn4O centres into a doubly-interpenetrated cubic network with a similar topology to observed with other linear dicarboxylates in the IRMOF series. Analysis of the nitrogen isotherm revealed the material to have a BET surface area of 1088 m2 g−1, which is approximately one-third of the value calculated from GCMC simulations, suggesting incomplete activation or pore blocking in the activated …
Synthesis And Anti-Leukaemic Activity Of Pyrrolo[3,2,1-Hi]Indole-1,2- Diones, Pyrrolo[3,2,1-Ij]Quinoline-1,2-Diones And Other Polycyclic Isatin Derivatives, Lidia Matesic, Julie M. Locke, Kara Vine, Marie Ranson, John B. Bremner, Danielle Skropeta
Synthesis And Anti-Leukaemic Activity Of Pyrrolo[3,2,1-Hi]Indole-1,2- Diones, Pyrrolo[3,2,1-Ij]Quinoline-1,2-Diones And Other Polycyclic Isatin Derivatives, Lidia Matesic, Julie M. Locke, Kara Vine, Marie Ranson, John B. Bremner, Danielle Skropeta
Faculty of Science - Papers (Archive)
To further expand the structure–cytotoxic activity relationships of isatin derivatives and to reduce flexibility in substituent groups at nitrogen, 20 analogues incorporating a ring system between the N1 and C7 atoms of isatin were prepared using a variety of synthetic strategies. This yielded pyrroloindole-, pyrroloquinoline-, pyrroloacridine-, pyrrolophenanthridine- and benzopyrrolophenanthridine-based systems with embedded isatin moieties, the latter possessing a novel carbon skeleton. These compounds were subsequently assessed for their in vitro cytotoxicity against human U937 lymphoma cells, with the brominated pyrroloacridine dione 27 showing the most promising activity (IC50 3.01 μM) after 24 h.
Synthesis, Properties And Water Permeability Of Swnt Buckypapers, L J. Sweetman, L Nghiem, I Chironi, G Triani, Marc In Het Panhuis, St F. Ralph
Synthesis, Properties And Water Permeability Of Swnt Buckypapers, L J. Sweetman, L Nghiem, I Chironi, G Triani, Marc In Het Panhuis, St F. Ralph
Faculty of Science - Papers (Archive)
The ability of macrocyclic ligands to facilitate formation of dispersions of single-walled carbon nanotubes (SWNTs) was investigated using a combination of absorption spectrophotometry and optical microscopy. Vacuum filtration of aqueous dispersions containing SWNTs and various macrocyclic ligands (derivatised porphyrin, phthalocyanine, cyclodextrin and calixarene) afforded self-supporting membranes known as buckypapers. Microanalytical data and energy dispersive X-ray spectra were obtained for these buckypapers and provided evidence for retention of the macrocyclic ligands within the structure of the membranes. The electrical conductivities of the membranes varied between 30 ± 20 and 220 ± 60 S cm−1, while contact angle analysis revealed they all …
Synthesis And Electrochemical Properties Of Sn-Sno2/C Nanocomposite, Chuanqi Feng, Meiyu Dan, Chaofeng Zhang, Zaiping Guo, Shiquan Wang, R Zeng
Synthesis And Electrochemical Properties Of Sn-Sno2/C Nanocomposite, Chuanqi Feng, Meiyu Dan, Chaofeng Zhang, Zaiping Guo, Shiquan Wang, R Zeng
Faculty of Engineering and Information Sciences - Papers: Part A
A Sn-Sn02/C nanocomposite was synthesized using the electrospinning method. Thermal analysis was used to determine the content range of Sn and Sn02 in the composite. The composite was characterized by X-ray diffraction, and the particle size and shape in the Sn-SnOiC composite were determined by scanning and transmission electron microscopy. The results show that the Sn-Sn02/C composite takes on a nanofiber morphology, with the diameters of the nanofibers distributed from 50 to 200 nm. The electrOChemical properties of the Sn-SnOiC composite were also investigated. The Sn-SnOiC composite as an electrode material has both higher reversible capacity (887 mAh· g-I). and …
Preeclampsia Is Associated With Compromised Maternal Synthesis Of Long-Chain Polyunsaturated Fatty Acids, Leading To Offspring Deficiency, Vanessa A. Mackay, Shahzya S. Huda, Frances M. Stewart, Kahmeng Tham, Louise A. Mckenna, Iain Martin, Fiona Jordan, E Ann Brown, Leanne Hodson, Ian A. Greer, Barbara J. Meyer, Dilys J. Freeman
Preeclampsia Is Associated With Compromised Maternal Synthesis Of Long-Chain Polyunsaturated Fatty Acids, Leading To Offspring Deficiency, Vanessa A. Mackay, Shahzya S. Huda, Frances M. Stewart, Kahmeng Tham, Louise A. Mckenna, Iain Martin, Fiona Jordan, E Ann Brown, Leanne Hodson, Ian A. Greer, Barbara J. Meyer, Dilys J. Freeman
Faculty of Health and Behavioural Sciences - Papers (Archive)
Obesity and excessive lipolysis are implicated in preeclampsia (PE). Intrauterine growth restriction is associated with low maternal body mass index and decreased lipolysis. Our aim was to assess how maternal and offspring fatty acid metabolism is altered in mothers in the third trimester of pregnancy with PE (n=62) or intrauterine growth restriction (n=23) compared with healthy pregnancies (n=164). Markers of lipid metabolism and erythrocyte fatty acid concentrations were measured. Maternal adipose tissue fatty acid composition and mRNA expression of adipose tissue fatty acid–metabolizing enzymes and placental fatty acid transporters were compared. Mothers with PE had higher plasma triglyceride (21%, P<0.001) and nonesterified fatty acid (50%, P<0.001) concentrations than controls. Concentrations of major n−6 and n−3 long-chain polyunsaturated fatty acids in erythrocytes were 23% to 60% lower (all P<0.005) in PE and intrauterine growth restriction mothers and offspring compared with controls. Subcutaneous adipose tissue −5 and −6 desaturase and very long-chain fatty acid elongase mRNA expression was lower in PE than controls (respectively, mean [SD] control 3.38 [2.96] versus PE 1.83 [1.91], P=0.030; 3.33 [2.25] versus 1.03 [0.96], P<0.001; 0.40 [0.81] versus 0.00 [0.00], P=0.038 expression relative to control gene [square root]). Low maternal and fetal long-chain polyunsaturated fatty acid concentrations in PE may be the result of decreased maternal synthesis.