Coleg Gwyddoniaeth a Pheirianneg

  1. Cyhoeddwyd

    The search for novelty continues for rewilding

    Hayward, M., Jachowski, J. D., Bugir, C. J., Clulow, J., Krishnamurthy, R., Griffin, A. S., Chalmers, A. C., Linnell, J. D. C., Montgomery, R. A., Somers, M. J., Kowalczyk, R., Heurich, M., Caravaggi, A., Marnewick, K. A., Di Blanco, Y., Shuttleworth, C., Callen, C., Weise, F., Scanlon, R., Moehrenschlager, A., Howell, L. & Upton, R. M. O., 1 Awst 2019, Yn: Biological Conservation. 236, t. 584-585

    Allbwn ymchwil: Cyfraniad at gyfnodolynErthygladolygiad gan gymheiriaid

  2. Cyhoeddwyd

    The seasonal cycle of nitrate in the Clyde Sea

    Rippeth, T. & Jones, K., 1 Awst 1997, Yn: Journal of Marine Systems. t. 299-310

    Allbwn ymchwil: Cyfraniad at gyfnodolynErthygladolygiad gan gymheiriaid

  3. Cyhoeddwyd

    The seasonal cycle of stratification in a Scottish fjord

    Rippeth, T., Midgley, R. & Simpson, J., 1995, Mare Nor Symposium on the Ecology of Fjords and Coastal Waters. t. 85-92

    Allbwn ymchwil: Pennod mewn Llyfr/Adroddiad/Trafodion CynhadleddPennodadolygiad gan gymheiriaid

  4. Cyhoeddwyd

    The seasonal cycles of stratification and circulation in the Thermaikos Gulf Region Of Freshwater Influence (ROFI), north-west Aegean.

    Hyder, P., Simpson, J. H., Christopoulos, S. & Krestenitis, Y., 1 Tach 2002, Yn: Continental Shelf Research. 22, 17, t. 2573-2597

    Allbwn ymchwil: Cyfraniad at gyfnodolynErthygladolygiad gan gymheiriaid

  5. Cyhoeddwyd

    The seasonal movement and abundance of the starfish, Asterias rubens in relation to mussel farming practice: A case study from the Menai Strait, UK.

    Gallagher, T., Richardson, C. A., Seed, R. & Jones, T., 1 Rhag 2008, Yn: Journal of Shellfish Research. 27, 5, t. 1209-1215

    Allbwn ymchwil: Cyfraniad at gyfnodolynErthygladolygiad gan gymheiriaid

  6. Cyhoeddwyd

    The sediment carbon stocks of intertidal seagrass meadows in Scotland

    Potouroglou, M., Whitlock, D., Milatovic, L., MacKinnon, G., Kennedy, H., Diele, K. & Huxham, M., 5 Medi 2021, Yn: Estuarine, Coastal and Shelf Science. 258

    Allbwn ymchwil: Cyfraniad at gyfnodolynErthygladolygiad gan gymheiriaid

  7. Cyhoeddwyd

    The self-indicating preparation of bromoferrocenes from stannylferrocenes and an improved synthesis of di-iodoferrocene

    Butler, I. R., Mehdar, Y. T. H. & Al-Taie, Z. S., Medi 2020, Yn: Heliyon. 6, 9, t. e04824

    Allbwn ymchwil: Cyfraniad at gyfnodolynErthygladolygiad gan gymheiriaid

  8. Cyhoeddwyd

    The semi-diurnal cycle of dissipation in a ROFI: model-measurement comparisons.

    Simpson, J., Burchard, H., Fisher, N. R. & Rippeth, T., 1 Gorff 2002, Yn: Continental Shelf Research. 22, 11-13, t. 1615-1628

    Allbwn ymchwil: Cyfraniad at gyfnodolynErthygladolygiad gan gymheiriaid

  9. Cyhoeddwyd

    The sex ratio distortion in the human head louse is conserved over time

    Perotti, M. A., Catala, S. S., Ormeno, A. D., Zelazowska, M., Bilinski, S. M. & Braig, H. R., 12 Mai 2004, Yn: BMC Genetics. 5, t. Article 10

    Allbwn ymchwil: Cyfraniad at gyfnodolynErthygladolygiad gan gymheiriaid

  10. Cyhoeddwyd

    The short-lived inhibitory effect of Brachiaria humidicola on nitrous oxide emissions following sheep urine application in a highly nitrifying soil

    Ma, Y., Charteris, A. F., Loick, N., Cardenas, L. M., Sha, Z., Lopez-Aizpun, M., Chen, Q., Jones, D. L. & Chadwick, D. R., Rhag 2021, Yn: Journal of Plant Nutrition and Soil Science. 184, 6, t. 723-732 10 t.

    Allbwn ymchwil: Cyfraniad at gyfnodolynErthygladolygiad gan gymheiriaid

  11. Cyhoeddwyd

    The significance of European precursor events in understanding the origin of Heinrich layers.

    Scourse, J. D., Hall, I. R., McCave, I. N., Young, J. R. & Sugdon, C., 1 Ion 2001.

    Allbwn ymchwil: Cyfraniad at gynhadleddPapur

  12. Cyhoeddwyd

    The significance of pH in dictating the relative toxicities of chloride and copper to acidophilic bacteria

    Falagan, C. & Johnson, D. B., Rhag 2018, Yn: Research in Microbiology. 169, 10, t. 552-557

    Allbwn ymchwil: Cyfraniad at gyfnodolynErthygladolygiad gan gymheiriaid

  13. Cyhoeddwyd

    The significance of variations in the angular correction factor in in-situ gamma spectrometry

    MacDonald, J., Gibson, CJ., Fish, P. & Assinder, D., 1998, Yn: Journal of Radiological Protection. 18, 1, t. 37-42 6 t.

    Allbwn ymchwil: Cyfraniad at gyfnodolynErthygladolygiad gan gymheiriaid

  14. Cyhoeddwyd

    The significant role of sediment bio-retexturing within a contemporary carbonate platform system: Implications for carbonate microfacies development

    O'Leary, M. J., Perry, C. T., Beavington-Penney, S. J. & Turner, J. R., 15 Gorff 2009, Yn: Sedimentary Geology. 219, 1-4, t. 169-179

    Allbwn ymchwil: Cyfraniad at gyfnodolynErthygladolygiad gan gymheiriaid

  15. Cyhoeddwyd

    The simulation of oscillating wave surge converters using a Boussinesq model; Wave disturbances around an array

    Christie, D. & Greenwood, C., 2015.

    Allbwn ymchwil: Cyfraniad at gynhadleddPapuradolygiad gan gymheiriaid

  16. Cyhoeddwyd

    The sleeping policeman: understanding issues of enforcement and compliance in conservation.

    Keane, A., Jones, J. P. G., Edwards-Jones, G. & Milner-Gulland, E. J., 1 Ebr 2008, Yn: Animal Conservation. 11, 2, t. 75-82

    Allbwn ymchwil: Cyfraniad at gyfnodolynErthygladolygiad gan gymheiriaid

  17. Cyhoeddwyd

    The smalleye stingray Dasyatis microps (Myliobatiformes: Dasyatidae) in the Gulf

    Moore, A., 2010, Yn: Zoology in the Middle East. 49, t. 101-103

    Allbwn ymchwil: Cyfraniad at gyfnodolynErthygladolygiad gan gymheiriaid

  18. Cyhoeddwyd

    The soil microbial community and plant biomass differentially contribute to the retention and recycling of urinary-N in grasslands

    Reay, M. K., Marsden, K., Powell, S., Rivera, L. M., Chadwick, D., Jones, D. L. & Evershed, R. P., 1 Mai 2023, Yn: Soil Biology and Biochemistry. 180, 109011.

    Allbwn ymchwil: Cyfraniad at gyfnodolynErthygladolygiad gan gymheiriaid

  19. Cyhoeddwyd

    The solid-state partitioning of contaminant metals and As in river channel sediments of the mining affected Tisa drainage basin, northwestern Romania and eastern Hungary

    Bird, G., Brewer, P., Macklin, M., Balteanu, D., Driga, B., Serban, M. & Zaharia, S., 1 Ion 2003, Yn: Applied Geochemistry. 18, 10, t. 1583-1595

    Allbwn ymchwil: Cyfraniad at gyfnodolynErthygladolygiad gan gymheiriaid

  20. Cyhoeddwyd

    The sorption of Volatile Organic Compounds (VOCS) by modified MDF panels and effects on mould colonisation and growth

    Stefanowski, B. K., Stefanowski, B., Curling, S. F. & Ormondroyd, G. A., 7 Hyd 2015, t. 175-184.

    Allbwn ymchwil: Cyfraniad at gynhadleddPapur

  21. Cyhoeddwyd

    The sorption of water vapour by anhydride modified softwood

    Hill, C., Papadopoulos, A. N. & Hill, C. A., 1 Rhag 2003, Yn: Wood Science and Technology. 37, 3-4, t. 221-231

    Allbwn ymchwil: Cyfraniad at gyfnodolynErthygladolygiad gan gymheiriaid

  22. Cyhoeddwyd

    The spatial ecology of Rajidae from mark-recapture tagging and its implications for assessing fishery interactions and efficacy of Marine Protected Areas

    Simpson, S., Humphries, N. E. & Sims, D. W., 1 Awst 2020, Yn: Fisheries Research. 228, 105569.

    Allbwn ymchwil: Cyfraniad at gyfnodolynErthygladolygiad gan gymheiriaid

  23. Cyhoeddwyd

    The spotted gar genome illuminates vertebrate evolution and facilitates human-teleost comparisons

    Braasch, I., Gehrke, A. R., Smith, J. J., Kawasaki, K., Manousaki, T., Pasquier, J., Amores, A., Desvignes, T., Batzel, P., Catchen, J., Berlin, A. M., Campbell, M. S., Barrell, D., Martin, K. J., Mulley, J. F., Ravi, V., Lee, A. P., Nakamura, T., Chalopin, D., Fan, S., Wcisel, D., Cañestro, C., Sydes, J., Beaudry, F. E., Sun, Y., Hertel, J., Beam, M. J., Fasold, M., Ishiyama, M., Johnson, J., Kehr, S., Lara, M., Letaw, J. H., Litman, G. W., Litman, R. T., Mikami, M., Ota, T., Saha, N. R., Williams, L., Stadler, P. F., Wang, H., Taylor, J. S., Fontenot, Q., Ferrara, A., Searle, S. M., Aken, B., Yandell, M., Schneider, I., Yoder, J. A., Volff, J., Meyer, A., Amemiya, C. T., Venkatesh, B., Holland, P. W., Guiguen, Y., Bobe, J., Shubin, N. H., Di Palma, F., Alföldi, J., Lindblad-Toh, K. & Postlethwait, J. H., 7 Maw 2016, Yn: Nature Genetics.

    Allbwn ymchwil: Cyfraniad at gyfnodolynErthygladolygiad gan gymheiriaid

  24. Cyhoeddwyd

    The spread of genetic constructs in natural insect populations.

    Braig, H. R., Yan, G., Letourneau, D. K. (gol.) & Burrows, B. E. (gol.), 1 Ion 2002, Genetically Engineered Organisms: Assessing Environmental and Human Health Effects. 2002 gol. CRC Press, t. 251-314

    Allbwn ymchwil: Pennod mewn Llyfr/Adroddiad/Trafodion CynhadleddPennod

  25. Cyhoeddwyd

    The statistical design of feeding experiments

    Ruohonen, K., Kettunen, J., King, J. W., Houlihan, D. (gol.), Boujard, T. (gol.) & Jobling, M. (gol.), 1 Ion 2001, Feed Intake in Fish. 2001 gol. Blackwell Scientific, t. 88-107

    Allbwn ymchwil: Pennod mewn Llyfr/Adroddiad/Trafodion CynhadleddPennod

  26. Cyhoeddwyd

    The status of Arctic charr Salvelinus alpinus in Britain and Ireland.

    Maitland, P. S., Winfield, I. J., McCarthy, I. D. & Igoe, F., 1 Maw 2007, Yn: Ecology of Freshwater Fish. 16, 1, t. 6-19

    Allbwn ymchwil: Cyfraniad at gyfnodolynErthygladolygiad gan gymheiriaid

  27. Cyhoeddwyd

    The status of the world's land and marine mammals: diversity, threat, and knowledge.

    Jenkins, R., Schipper, J., Chanson, J. S., Chiozza, F., Cox, N. A., Hoffman, M., Katariya, V., Lamoreux, J., Rodrigues, A. S., Stuart, S. N., Temple, H. J., Baille, J., Boitani, L., Lacher, T. E., Mittermeier, R. A., Smith, A. T., Absolon, D., Aguiar, J. M., Amori, G., Bakkour, N., Baldi, R., Berridge, R. J., Bielby, J., Black, P. A., Blanc, J. J., Brooks, T. M., Burton, J. A., Butynski, T. M., Catullo, G., Chapman, R., Cokeliss, Z., Collen, B., Conroy, J., Cooke, J. G., Da Fonseca, G. A., Derocher, A. E., Dublin, H. T., Duckworth, J. W., Emmons, L., Emslie, R. H., Festa-Biancet, M., Foster, M., Foster, S., Garshelis, D. L., Gates, C., Gimenez-Dixon, M., Gonzalez, S., Gonzalez-Maya, J., Good, T. C., Hammerson, G., Hammond, P. S., Happold, D., Happold, M., Hare, J., Harris, R. B., Hawkins, C. E., Haywood, M., Heaney, L. R., Hedges, S., Helgen, K. M., Hilton-Taylor, C., Hussain, S. A., Ishii, N., Jefferson, T. A., Jenkins, R. K., Johnston, C. H., Keith, M., Kingdon, J., Knox, D. H., Kovacs, K. M., Langhammer, P., Leus, K., Lewison, R., Lichtenstein, G., Lowry, L. F., Macavoy, Z., Mace, G. M., Mallon, D. P., Masi, M., McKnight, M. W., Medellin, R. A., Medici, P., Mills, G., Moehlman, P. D., Molur, S., Mora, A., Nowell, K., Oates, J. F., Olech, W., Oliver, W. R., Opera, M., Patterson, B. D., Perrin, W. F., Polidoro, B. A., Pollock, C., Powel, A., Protas, Y., Racey, P., Ragle, J., Ramani, P., Rathbun, G., Reeves, R. R., Reilly, S. B., Reynolds, J. E., Rondinini, C., Rosell-Ambal, R. G., Rulli, M., Rylands, A. B., Savini, S., Schank, C. J., Sechrest, W., Self-Sullivan, C., Shoemaker, A., Sillero-Zubiri, C., De Silva, N., Smith, D. E., Srinivasulu, C., Stephenson, P. J., Van Strien, N., Talukdar, B. K., Taylor, B. L., Timmins, R., Tirira, D. G., Tognelli, M. F., Tsytsulina, K., Veiga, L. M., Vie, J. C., Williamson, E. A., Wyatt, S. A., Xie, Y. & Young, B. E., 10 Hyd 2008, Yn: Science. 322, 5899, t. 225-230

    Allbwn ymchwil: Cyfraniad at gyfnodolynErthygladolygiad gan gymheiriaid

  28. Cyhoeddwyd

    The stoichiometric dissociation constants of carbonic acid in seawater brines from 298 to 267 K

    Papadimitriou, E., Loucaides, S., Rerolle, V., Kennedy, D., Achtberberg, E. P., Dickson, A. G., Mowlem, M. & Kennedy, H., 1 Ion 2018, Yn: Geochimica et Cosmochimica Acta. 220, t. 55-70

    Allbwn ymchwil: Cyfraniad at gyfnodolynErthygladolygiad gan gymheiriaid

  29. Cyhoeddwyd

    The strategic significance of wastewater sources to pollutant phosphorus levels in English rivers and to environmental management for rural, agricultural and urban catchments

    Neal, C., Jarvie, H. P., Withers, P., Whitton, B. A. & Neal, M., 1 Maw 2010, Yn: Science of the Total Environment. 408, 7, t. 1485-1500

    Allbwn ymchwil: Cyfraniad at gyfnodolynErthygladolygiad gan gymheiriaid

  30. Cyhoeddwyd

    The structural and functional diversification of the Toxicofera reptile venom system

    Wuster, W., Fry, B. G., Casewell, N. R., Wüster, W., Vidal, N., Young, B. & Jackson, T. N., 15 Medi 2012, Yn: Toxicon. 60, 4, t. 434-448

    Allbwn ymchwil: Cyfraniad at gyfnodolynErthygladolygiad gan gymheiriaid

  31. Cyhoeddwyd

    The structure and functioning of the northern Baltic Sea ice assemblages along a salinity gradient from freshwater source to the open sea.

    Kaartokallio, H., Granskog, M. A., Thomas, D. N., Ehn, J. & Kuosa, H., 1 Ion 2003.

    Allbwn ymchwil: Cyfraniad at gynhadleddPapur

  32. Cyhoeddwyd

    The structure of dissipation in the western Irish Sea front.

    Simpson, J. H., Green, M., Rippeth, T. P., Osborn, T. R. & Nimmo-Smith, W. A., 1 Meh 2009, Yn: Journal of Marine Systems. 77, 4, t. 428-440

    Allbwn ymchwil: Cyfraniad at gyfnodolynErthygladolygiad gan gymheiriaid

  33. Cyhoeddwyd

    The summer distribution of coastal minke whales (Balaenoptera acutorostrata) in the southern outer Moray Firth, NE Scotland, in relation to co-occurring mesoscale oceanographic features.

    Tetley, M. J., Mitchelson-Jacob, E. G. & Robinson, K. P., 15 Awst 2008, Yn: Remote Sensing of the Environment. 112, 8, t. 3449-3454

    Allbwn ymchwil: Cyfraniad at gyfnodolynErthygladolygiad gan gymheiriaid

  34. Cyhoeddwyd

    The supplementation of a prebiotic improves the microbial community in the gut and the skin of Atlantic salmon (Salmo salar)

    Baumgärtner, S., James, J. & Ellison, A., 1 Awst 2022, Yn: Aquaculture Reports. 25, 101204.

    Allbwn ymchwil: Cyfraniad at gyfnodolynErthygladolygiad gan gymheiriaid

  35. Cyhoeddwyd

    The sustainability of rice‐crayfish coculture systems: a mini review of evidence from Jianghan plain in China

    Hou, J., Styles, D., Cao, Y. & Ye, X., 1 Gorff 2021, Yn: Journal of the Science of Food and Agriculture. 101, 9, t. 3843-3853 11 t.

    Allbwn ymchwil: Cyfraniad at gyfnodolynErthygladolygiad gan gymheiriaid

  36. Cyhoeddwyd

    The sweet and the bitter: Intertwined positive and negative social impacts of a biodiversity offset

    Bidaud, C., Schreckenberg, K., Rabeharison, M., Ranjatson, P., Gibbons, J. & Jones, J. P. G., 2017, Yn: Conservation & Society. 15, 1, t. 1-13

    Allbwn ymchwil: Cyfraniad at gyfnodolynErthygladolygiad gan gymheiriaid

  37. Cyhoeddwyd

    The synthesis and biological activity of the marine metabolite cylindrospermopsin

    Murphy, P. J. & Thomas, C. W., 1 Medi 2001, Yn: Chemical Society Reviews. 30, 5, t. 303-312

    Allbwn ymchwil: Cyfraniad at gyfnodolynErthygladolygiad gan gymheiriaid

  38. Cyhoeddwyd

    The synthesis and characterisation of a poly (maleimide ether) containing pendent thiophene rings

    Edge, S., Charlton, A., Varma, K. S., Underhill, A., Hansen, T. K., Becher, J. & Kathirgamanathan, P., 1992, Yn: Journal of Polymer Science Part A: Polymer Chemistry. 30, 13, t. 2773-2780

    Allbwn ymchwil: Cyfraniad at gyfnodolynErthygladolygiad gan gymheiriaid

  39. Cyhoeddwyd

    The synthesis of (11R,12S)-lactobacillic acid and its enantionmer.

    Coxon, G. D., Al-Dulayymi, J., Baird, M. S., Knobl, S., Roberts, E. & Minnikin, D. E., 2 Mai 2003, Yn: Tetrahedron Asymmetry. 14, 9, t. 1211-1222

    Allbwn ymchwil: Cyfraniad at gyfnodolynErthygladolygiad gan gymheiriaid

  40. Cyhoeddwyd

    The synthesis of a major α′-mycolic acid of Mycobacterium smegmatis.

    Muzael, M., Koza, G., Al-Dulayymi, J. & Baird, M. S., 1 Medi 2010, Yn: Chemistry and Physics of Lipids. 163, 7, t. 678-684

    Allbwn ymchwil: Cyfraniad at gyfnodolynErthygladolygiad gan gymheiriaid

  41. Cyhoeddwyd

    The synthesis of a single enantiomer of a major a-mycolic acid of Mycobacterium tuberculosis

    Al-Dulayymi, J., Baird, M. S. & Roberts, E., 1 Ion 2003, Yn: Chemical Communications. 2, t. 228-229

    Allbwn ymchwil: Cyfraniad at gyfnodolynErthygladolygiad gan gymheiriaid

  42. Cyhoeddwyd

    The synthesis of a single enantiomer of a major α-mycolic acid of M. tuberculosis

    Al-Dulayymi, J., Baird, M. S. & Roberts, E., 12 Rhag 2005, Yn: Tetrahedron. 61, 50, t. 11939-11951

    Allbwn ymchwil: Cyfraniad at gyfnodolynErthygladolygiad gan gymheiriaid

  43. Cyhoeddwyd

    The synthesis of an analogue of the locust CRF-like diuretic peptide, and the biological activities of this and some C-terminal fragments.

    Goldsworthy, G. J., Chung, J. S., Simmonds, S. J., Tatari, M., Varouni, S. & Poulos, C. P., 1 Hyd 2003, Yn: Peptides. 24, 10, t. 1607-1613

    Allbwn ymchwil: Cyfraniad at gyfnodolynErthygladolygiad gan gymheiriaid

  44. Cyhoeddwyd

    The synthesis of both enantiomers of lactobacillic acid and mycolic acid analogues.

    Coxon, GD., Knobl, S., Roberts, E., Baird, MS., Al Dulayymi, JR., Besra, GS., Brennan, PJ. & Minnikin, DE., 3 Medi 1999, Yn: Tetrahedron Letters. 40, 36, t. 6689-6692 4 t.

    Allbwn ymchwil: Cyfraniad at gyfnodolynErthygladolygiad gan gymheiriaid

  45. Cyhoeddwyd

    The synthesis of methoxy and keto mycolic acids containing methyl-trans-cyclopropanes

    Koza, G., Muzael, M., Schubert-Rowles, R. R., Theunissen, C., Al-Dulayymi, J. & Baird, M. S., 29 Gorff 2013, Yn: Tetrahedron. 69, 30, t. 6285-6296

    Allbwn ymchwil: Cyfraniad at gyfnodolynErthygladolygiad gan gymheiriaid

  46. Cyhoeddwyd

    The synthesis of one enantiomer of the α-methyl-trans-cyclopropane unit of mycolic acids

    Al-Dulayymi, J., Baird, M., Mohammed, H., Roberts, E. & Clegg, W., 15 Mai 2006, Yn: Tetrahedron. 62, 20, t. 4851-4862

    Allbwn ymchwil: Cyfraniad at gyfnodolynErthygladolygiad gan gymheiriaid

  47. Cyhoeddwyd

    The synthesis of single enantiomers of a meromycolic acid

    Al Dulayymi, JR., Baird, MS. & Roberts, E., 2 Medi 2000, Yn: Tetrahedron Letters. 41, 36, t. 7107-7110 4 t.

    Allbwn ymchwil: Cyfraniad at gyfnodolynErthygladolygiad gan gymheiriaid

  48. Cyhoeddwyd

    The synthesis of single enantiomers of meromycolic acids from mycobacterial wax esters

    Al-Dulayymi, J., Baird, M. S., Roberts, E. & Minnikin, D. E., 18 Rhag 2006, Yn: Tetrahedron. 62, 51, t. 11867-11880

    Allbwn ymchwil: Cyfraniad at gyfnodolynErthygladolygiad gan gymheiriaid

  49. Cyhoeddwyd

    The synthesis of single enantiomers of mycobacterial ketomycolic acids containing cis-cyclopropanes.

    Koza, G., Theunissen, C., Al-Dulayymi, J. & Baird, M. S., 5 Rhag 2009, Yn: Tetrahedron. 65, 49, t. 10214-10229

    Allbwn ymchwil: Cyfraniad at gyfnodolynErthygladolygiad gan gymheiriaid

  50. Cyhoeddwyd

    The synthesis of single enantiomers of trans-alkene containing mycolic acids and related sugar esters

    Ali, H., Koza, G., Hameed, R., Rowles, R., Davies, C., Al-Dulayymi, J. R., Gwenin, C. & Baird, M., 10 Tach 2016, Yn: Tetrahedron. 72, 45, t. 7143-7158 15 t.

    Allbwn ymchwil: Cyfraniad at gyfnodolynErthygladolygiad gan gymheiriaid