George W. Weaver

ORCID: 0000-0002-1316-1941
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Research Areas
  • Crystallization and Solubility Studies
  • X-ray Diffraction in Crystallography
  • Synthesis and Characterization of Heterocyclic Compounds
  • Synthesis and biological activity
  • Synthesis and Biological Evaluation
  • Synthesis and Reactions of Organic Compounds
  • Chemical Synthesis and Reactions
  • Chemical Synthesis and Analysis
  • Synthesis and Reactivity of Heterocycles
  • Organometallic Complex Synthesis and Catalysis
  • Phenothiazines and Benzothiazines Synthesis and Activities
  • Chemical Reaction Mechanisms
  • Quinazolinone synthesis and applications
  • Structural and Chemical Analysis of Organic and Inorganic Compounds
  • Synthesis of heterocyclic compounds
  • Inorganic and Organometallic Chemistry
  • Fluorine in Organic Chemistry
  • Organic Chemistry Cycloaddition Reactions
  • Crystallography and molecular interactions
  • Trypanosoma species research and implications
  • Origins and Evolution of Life
  • Sulfur-Based Synthesis Techniques
  • Synthesis and pharmacology of benzodiazepine derivatives
  • Synthesis and Reactivity of Sulfur-Containing Compounds
  • Conducting polymers and applications

Loughborough University
2014-2024

De Montfort University
2016

Oregon State University
2012-2013

US Forest Service
2013

University of Edinburgh
1999

Institute of Cancer Research
1999

University of Oxford
1996-1999

University of London
1999

London School of Hygiene & Tropical Medicine
1999

Dyson (United Kingdom)
1994-1995

The rapid worldwide emergence of the amphibian pathogen Batrachochytrium dendrobatidis (Bd) is having a profound negative impact on biodiversity. However, global research efforts are fragmented and an overarching synthesis infection data lacking. Here, we provide results from community tool for compilation Bd presence report analyses collated over four-year period. Using this online database, analysed: 1) spatial taxonomic patterns infection, including families that appear over-...

10.1371/journal.pone.0056802 article EN cc-by PLoS ONE 2013-02-27

Small tension and compression specimens were made from beef femurs alternate embalmed. The stress-strain diagrams then obtained using automatic recording equipment. From this diagram the modulus of elasticity, ultimate strength, maximum strain to failure determined. hardness all was measured. A statistical evaluation data indicated that embalming causes a significant reduction (12%) in compressive strength bone, but only very slight reductions tensile strain, elasticity. change found be...

10.1152/jappl.1964.19.6.1234 article EN Journal of Applied Physiology 1964-11-01

Abstract A genecological approach was used to explore genetic variation in adaptive traits P seudoroegneria spicata , a key restoration grass, the intermountain western United States. Common garden experiments were established at three contrasting sites with seedlings from two maternal parents each of 114 populations along five commercial releases commonly restoration. Traits associated size, flowering phenology, and leaf width varied considerably among moderately correlated climates seed...

10.1111/eva.12077 article EN cc-by Evolutionary Applications 2013-06-06

Alkyl, aryl, heteroaryl and acyl radicals have been cyclised onto the 2-position of 3H-quinazolin-4-one. The side chains containing radical precursors were attached to nitrogen atom in 3-position. cyclisations take place by aromatic homolytic substitution hence retain aromaticity 3H-quinazolin-4-one ring. highest yields obtained using hexamethylditin facilitate cyclisation rather than reduction without cyclisation. alkaloids deoxyvasicinone 2, mackinazolinone 3, tryptanthrin 4, luotonin A 5...

10.1039/b614075k article EN Organic & Biomolecular Chemistry 2006-11-03

2,2':6',2' '-Terpyridineplatinum(II) complexes are shown to possess cytotoxicity against a number of human ovarian tumor cell lines. Many the show similar activity cisplatin- and doxorubicin-resistant lines as parental cells suggesting that there is little or no cross-resistance with cisplatin doxorubicin. The bis[2,2':6',2' '-terpyridineplatinum(II)] strongly dependent on nature linker. Bis[2,2':6',2' flexible linker at 4'-position poor cytotoxicity; by contrast rigid short linkers...

10.1021/jm991053y article EN Journal of Medicinal Chemistry 1999-07-24

A range of (2,2':6',2' '-terpyridine)platinum(II) complexes are shown to possess antiprotozoal activity in vitro against Leishmania donovani, Trypanosoma cruzi, and brucei, the causative organisms tropical diseases leishmaniasis trypanosomiasis. The best compounds caused 100% 78% inhibition growth intracellular amastigote forms L. donovani T. respectively, at a concentration 1 μM bloodstream trypomastigote brucei 0.03 μM. results obtained with which fourth ligand platinum(II) is capable...

10.1021/jm981074c article EN Journal of Medicinal Chemistry 1999-03-01

Additive manufacturing or '3D printing' is being developed as a novel process for the production of bespoke micro- and milliscale fluidic devices. When coupled with online monitoring optimisation software, this offers an advanced, customised method performing automated chemical synthesis. This paper reports use two additive processes, stereolithography selective laser melting, to create multifunctional devices embedded reaction capability. The selectively melted parts are first published...

10.3762/bjoc.13.14 article EN cc-by Beilstein Journal of Organic Chemistry 2017-01-18

Different dimeric disulfides, having the basic skeleton of bis[2-amino-4-phenyl-5-thiazolyl] disulfides were synthesized in a straightforward manner from acetophenones. 2-Amino-4-phenyl-1,3-thiazoles prepared by reaction thiourea with substituted acetophenones presence iodine which then converted to title compounds. All compounds subjected preliminary evaluation for their biological activity against Gram positive and negative bacteria. Some assayed showed marked Bacillus cereus Pseudomonas...

10.1248/cpb.55.1014 article EN Chemical and Pharmaceutical Bulletin 2007-01-01

Lithium–bromine exchange in 2-bromophenyl perfluoroaryl ethers or sulfides affords fused fluorinated benzofurans benzothiophenes respectively by SNAr substitution of the adjacent fluorine substituent. The structures new compounds were confirmed NMR spectroscopy and single crystal X-ray diffraction analysis. In case tetrafluoropyrid-4-yl ether, lithiation promoted a Smiles-type rearrangement which led to formation 4-(2-hydroxyphenyl)tetrafluoropyridine, for structure was crystallography.

10.1039/c0ob00790k article EN Organic & Biomolecular Chemistry 2010-11-23

Abstract BACKGROUND: The objective of this study was to assess whether canned peaches could deliver nutrient levels comparable fresh peaches. Fresh freestone peaches, cling and were analyzed for vitamins A, C E, folate, antioxidants, total phenolics carotenoids how these nutrients affected by the canning process storage further changed components. RESULTS: phytochemicals measured in found be present versus at statistically significantly higher (vitamin C, antioxidants folate); but not...

10.1002/jsfa.5849 article EN Journal of the Science of Food and Agriculture 2012-09-11

A series of eight new azomethine derivatives were synthesized by reacting 2-formylphenoxyacetic acid with aromatic amines. The chemical structures these compounds confirmed means 1H-NMR, 13C-NMR, MS and elemental analysis. assayed the disc diffusion method for antibacterial against Staphylococcus aureus Escherichia coli. Among tested, 2a, 2b, 2e, 2g 2h exhibited good activity, almost equal to that Ciprofloxacin used as standard.

10.3390/12020245 article EN cc-by Molecules 2007-02-22

Abstract We report a convenient synthesis of 4‐hydroxy‐2‐methyl‐(2H)‐1,2‐benzothiazine‐3‐sulfonic acid‐1,1‐dioxide (6a) prepared in novel one‐pot reaction. The involves two transformations starting from 2‐methyl‐2H‐1,2‐benzothiazin‐4‐(3H)‐one 1,1‐dioxide (7) with an overall yield better than that the stepwise process, as well alternate procedure saccharin (1). One‐pot important intermediate, saccharin‐N‐methane sulfonic acid (4), is also described.

10.1080/00397910601131437 article EN Synthetic Communications 2007-03-01

ABSTRACTABSTRACTSurface polyester fibers modified by laser beam energy have been found to display improved dye uptake (Lau et al. 1997; Kamel 2012; Shahidi 2013). This research considers "laser-dye" patterning as an alternative coloration method within a textile design context. In this study, standardized (PET) knitted jersey and plain, woven fabrics were with CO2 technology engineer onto the fabric high-resolution graphics. The work considered aesthetic possibilities, production...

10.2752/205117814x14228978833457 article EN Journal of Textile Design Research and Practice 2014-11-01

The effects of geographic information system (GIS) data conversion on several polygon-and landscape-level indices were evaluated by using a GIS vegetation coverage from eastern Oregon, U.S.A. A vector–raster–vector process was used to examine changes in data. This is widely for input (digital scanning vector maps) and somewhat less (output specific formats). Most measures sensitive the grid cell size process. At polygon level, with sizes 3.05, 6.10, 10 m produced relatively small original...

10.1139/x26-158 article EN Canadian Journal of Forest Research 1996-08-01

Abstract Metal-based materials, such as silver or copper, are highly desired current collector materials for flexible energy storage due to their excellent electrical properties but lack the long-term operational electrochemical stability. Herein we report a method prevent corrosion of while fully exploiting properties. This was achieved by covering with an electrochemically stable conductive carbon-based layer. The barrier layer allows flow charge between electrically elements textile...

10.1088/2058-8585/accf26 article EN cc-by Flexible and Printed Electronics 2023-04-21

Human African trypanosomiasis, or sleeping sickness, is a neglected tropical disease caused by Trypanosoma brucei rhodesiense and gambiense invariably fatal unless treated. Current therapies present limitations in their application, parasite resistance, require further clinical investigation for wider use. Our work, informed previous findings, presents novel 4-[4-(4-methylpiperazin-1-yl)phenyl]-6-arylpyrimidine derivatives with promising antitrypanosomal activity. In particular, 32 exhibits...

10.1016/j.bmcl.2024.129825 article EN cc-by-nc Bioorganic & Medicinal Chemistry Letters 2024-05-31

We report an unexpected ring expansion reaction of enantiopure fenchone-derived imidazolinium salt during attempts to form copper complexes the corresponding imidazoline carbene ligand. A N,N‘-difenchyl piperazinone was formed in low yield together with difenchyl-substituted five-membered urea.

10.1021/ol0609917 article EN Organic Letters 2006-06-14

Two step synthesis of Schiff base ligand and its transition metal complexes was done by condensation reaction. In first step, the drug aldehyde in equimolar ratio were refluxed for one hour at pH 8-9 order to get ligand. second salts 2 hour. The Cu(II), Ni(II), Co(II), Fe(II), Mn(II), Zn(II) characterized using different instruments like FT-IR, 1H-NMR, 13C-NMR, Mass, Atomic absorption spectrometer, Elemental analyzer, UV-visible spectrophotometer, Evans balance, Conductivitymeter...

10.37358/rc.20.1.7833 article EN cc-by Revista de Chimie 2020-02-07

It is proved by deuterium labelling and NMR spectroscopy that a hydride equivalent from NADPH transferred to C-19 of precorrin-6x as this intermediate converted enzymically into hydrogenobyrinic acid.

10.1039/c39910000976 article EN Journal of the Chemical Society Chemical Communications 1991-01-01
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