Cyhoeddiadau

Hidlyddion uwch

Pob awdur

i
  1. 2021
  2. Cyhoeddwyd

    Faunal mediated carbon export from mangroves in an arid area

    Walton, M., Al Maslamani, I., Chatting, M., Smyth, D., Castillo, A., Skov, M. & Le Vay, L., 10 Chwef 2021, Yn: Science of the Total Environment. 755, 1, 13 t., 142677.

    Allbwn ymchwil: Cyfraniad at gyfnodolynErthygladolygiad gan gymheiriaid

  3. Metabolomic Biomarkers for the Detection of Obesity-Driven Endometrial Cancer

    Njoku, K., Campbell, A. E., Geary, B., MacKintosh, M. L., Derbyshire, A. E., Kitson, S. J., Sivalingam, V. N., Pierce, A., Whetton, A. D. & Crosbie, E. J., 10 Chwef 2021, Yn: Cancers. 13, 4, t. 718 1 t.

    Allbwn ymchwil: Cyfraniad at gyfnodolynErthygladolygiad gan gymheiriaid

  4. Cyhoeddwyd

    Metal pollution as a potential threat to shell strength and survival in marine bivalves.

    Stewart, B. D., Jenkins, S., Boig, C., Sinfield, C., Kennington, K., Brand, A., Lart, W. & Kroger, R., 10 Chwef 2021, Yn: Science of the Total Environment. 755, 143019.

    Allbwn ymchwil: Cyfraniad at gyfnodolynErthygladolygiad gan gymheiriaid

  5. Cyhoeddwyd

    Can you see me? Participant experience of accessing a weight management programme via group videoconference to overcome barriers to engagement

    Cliffe, M., Di Battista, E. & Bishop, S., 12 Chwef 2021, Yn: Health Expectations. 24, 1, t. 66-76 10 t.

    Allbwn ymchwil: Cyfraniad at gyfnodolynErthygladolygiad gan gymheiriaid

  6. Cyhoeddwyd

    Circular Business Models

    Kaleem Ullah, ., 12 Chwef 2021, 2 t. Bangor University.

    Allbwn ymchwil: Cyfraniad arallCyfraniad Arall

  7. Cyhoeddwyd

    Plasma Interleukin-10 and Cholesterol Levels May Inform about Interdependences between Fitness and Fatness in Healthy Individuals

    Sartor, F., Moore, J. & Kubis, H-P., 12 Chwef 2021, Yn: International Journal of Environmental Research and Public Health. 18, 4, 1800.

    Allbwn ymchwil: Cyfraniad at gyfnodolynErthygladolygiad gan gymheiriaid

  8. A multi-objective optimization model for strategic waste management master plans

    Abdallah, M., Hamdan, S. & Shabib, A., 15 Chwef 2021, Yn: Journal of Cleaner Production. 284, 124714.

    Allbwn ymchwil: Cyfraniad at gyfnodolynErthygladolygiad gan gymheiriaid

  9. Cyhoeddwyd

    Improving quantification of bivalve larvae in mixed plankton samples using qPCR: A case study on Mytilus edulis

    Alexander, J., Malham, S., Smyth, D., Webb, J., Fidler, D., Bayford, P., McDonald, J. & Le Vay, L., 15 Chwef 2021, Yn: Aquaculture. 532, 736003.

    Allbwn ymchwil: Cyfraniad at gyfnodolynErthygladolygiad gan gymheiriaid

  10. On preventive maintenance policies: a selection framework

    Alsyouf, I., Hamdan, S., Shamsuzzaman, M., Haridy, S. & Alawaysheh, I., 16 Chwef 2021, Yn: Journal of Quality in Maintenance Engineering. 27, 1, t. 225-252

    Allbwn ymchwil: Cyfraniad at gyfnodolynErthygladolygiad gan gymheiriaid

  11. Cyhoeddwyd

    Early impact of COVID-19 social distancing measures on reported sexual behaviour of HIV pre-exposure prophylaxis users in Wales

    Gillespie, D., Knapper, C., Hughes, D., Couzen, Z., Wood, F., de Bruin, M., Ma, R., Jones, A. T., Williams, A. & Hood, K., 17 Chwef 2021, Yn: Sexually transmitted infections. 97, 2, t. 85-87 3 t., 054598.

    Allbwn ymchwil: Cyfraniad at gyfnodolynErthygladolygiad gan gymheiriaid

  12. Cyhoeddwyd

    This time it’s personal: reappraisal after acquired brain injury

    Rowlands, L., Coetzer, R. & Turnbull, O., 17 Chwef 2021, Yn: Cognition and Emotion. 35, 2, t. 305-323

    Allbwn ymchwil: Cyfraniad at gyfnodolynErthygladolygiad gan gymheiriaid

  13. Cyhoeddwyd

    E. coli Is a Poor End-Product Criterion for Assessing the General Microbial Risk Posed From Consuming Norovirus Contaminated Shellfish

    Sharp, J. H., Clements, K., Diggens, M., McDonald, J. E., Malham, S. K. & Jones, D. L., 19 Chwef 2021, Yn: Frontiers in Microbiology. 12, t. 608888

    Allbwn ymchwil: Cyfraniad at gyfnodolynErthygladolygiad gan gymheiriaid

  14. Cyhoeddwyd

    Nature provides valuable sanitation services

    Willcock, S., Parker, A., Wilson, C., Brewer, T., Bundhoo, D., Cooper, S., Lynch, K., Mishra, P. P., Mekala, S., Rey, D., Welivita, I., Venkatesh, K. & Hutchings, P., 19 Chwef 2021, Yn: One Earth. 4, 2, t. 192-201 18 t.

    Allbwn ymchwil: Cyfraniad at gyfnodolynErthygladolygiad gan gymheiriaid

  15. Precipitation-optimised targeting of nitrogen fertilisers in a model maize cropping system

    McKay Fletcher, D. M., Ruiz, S. A., Dias, T., Chadwick, D. R., Jones, D. L. & Roose, T., 20 Chwef 2021, Yn: Science of the Total Environment. 756, 144051.

    Allbwn ymchwil: Cyfraniad at gyfnodolynErthygladolygiad gan gymheiriaid

  16. Cyhoeddwyd

    Concentration and quantification of SARS-CoV-2 RNA in wastewater using polyethylene glycol-based concentration and qRT-PCR

    Farkas, K., Hillary, L., Thorpe, J., Walker, D., Lowther, J. A., McDonald, J., Malham, S. & Jones, D. L., 23 Chwef 2021, Yn: Methods and Protocols. 4, 1, 10 t., 17.

    Allbwn ymchwil: Cyfraniad at gyfnodolynErthygladolygiad gan gymheiriaid

  17. Cyhoeddwyd

    Implementing the Mindfulness-Based Interventions; Teaching Assessment Criteria (MBI:TAC) in Mindfulness-Based Teacher Training

    Griffith, G., Crane, R., Baer, R., Fernandez, E., Giommi, F., Herbette, G. & Koerbel, L., 24 Chwef 2021, Yn: Global Advances in Health and Medicine.

    Allbwn ymchwil: Cyfraniad at gyfnodolynErthygladolygiad gan gymheiriaid

  18. Cyhoeddwyd

    Invariant Gametogenic Response of Dominant Infaunal Bivalves From the Arctic Under Ambient and Near-Future Climate Change Conditions

    Reed, A. J., Godbold, J., Solan, M. & Grange, L., 25 Chwef 2021, Yn: Frontiers in Marine Science. 8, 576746.

    Allbwn ymchwil: Cyfraniad at gyfnodolynErthygladolygiad gan gymheiriaid

  19. Cyhoeddwyd

    Plus ça Change? An Empirical Analysis of Judicial Review in Modern Administrative Law

    Nason, S., 25 Chwef 2021, Executive Decision-Making and the Courts : Revisiting the Origins of Modern Judicial Review. Arvind, TT., Stirton, L., Kirkham, R. & Mac Síthigh, D. (gol.). Bloomsbury, 22 t.

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

  20. Cyhoeddwyd

    Perceptions of European ME/CFS experts concerning knowledge and understanding of ME/CFS among primary care physicians in Europe: A report from the European ME/CFS Research Network (EUROMENE)

    Cullinan, J., Pheby, D. F. H., Araja, D., Berkis, U., Brenna, E., de Korwin, J-D., Gitto, L., Hughes, D., Hunter, R. M., Trépel, D. & Wang-Steverding, X., 26 Chwef 2021, Yn: Medicina. 57, 3, 208.

    Allbwn ymchwil: Cyfraniad at gyfnodolynErthygladolygiad gan gymheiriaid

  21. The taxonomic identity and distribution of the eel cod Muraenolepis (Gadiformes: Muraenolepididae) around South Georgia and the South Sandwich Islands

    Fitzcharles, E., Hollyman, P. R., Goodall-Copestake, W. P., Maclaine, J. S. & Collins, M. A., 26 Chwef 2021, Yn: Polar Biology. 44, 4, t. 637-651 15 t.

    Allbwn ymchwil: Cyfraniad at gyfnodolynErthygladolygiad gan gymheiriaid

  22. Cyhoeddwyd

    Atomistic modeling approach to the thermodynamics of sodium silicate glasses

    Fossati, P. C. M., Mellan, T. A., Kuganathan, N. & Lee, W. E., Maw 2021, Yn: Journal of American Ceramic Society. 104, 3, t. 1331-1344 14 t.

    Allbwn ymchwil: Cyfraniad at gyfnodolynErthygladolygiad gan gymheiriaid

  23. Cyhoeddwyd

    Cognitive impairment negatively impacts allied health service uptake: Investigating the association between health and service use.

    MacLeod, C., Bu, F., Rutherford, A., Phillips, J., Woods, R. & CFAS-Wales research team, Maw 2021, Yn: SSM - Population Health . 13, 100720.

    Allbwn ymchwil: Cyfraniad at gyfnodolynErthygladolygiad gan gymheiriaid

  24. Cyhoeddwyd

    Electrochemical quantification of D-glucose during the production of bioethanol from thermo-mechanically pre-treated wheat straw

    Ward, R. A., Charlton, A., Welham, K. J., Baker, P., Zein, S. H., Tomkinson, J., Richards, D. I., Kelly, S. M., Lawrence, N. S. & Wadhawan, J. D., Maw 2021, Yn: Electrochemistry Communications. 124, 106942.

    Allbwn ymchwil: Cyfraniad at gyfnodolynErthygladolygiad gan gymheiriaid

  25. Cyhoeddwyd

    Electronic clinical decision support tool for assessing stomach symptoms in primary care (ECASS): a feasibility study

    Rubin, G., Walter, F. M., Emery, J., Hamilton, W., Hoare, Z., Howse, J., Nixon, C., Srivastava, T., Thomas, C., Ukoumunne, O. C., Usher-Smith, J. A., Whyte, S. & Neal, R. D., Maw 2021, Yn: BMJ Open. 11, 3, e041795.

    Allbwn ymchwil: Cyfraniad at gyfnodolynErthygladolygiad gan gymheiriaid

  26. Cyhoeddwyd

    Embracing Change: Learnings From Implementing Multidimensional Digital Remote Monitoring in Oncology Patients at a District General Hospital During the COVID-19 Pandemic

    Komarzynski, S., Wreglesworth, N. I., Griffiths, D., Pecchia, L., Subbe, C. P., Hughes, S. F., Davies, E. H. & Innominato, P. F., Maw 2021, Yn: JCO Clinical Cancer Informatics. 5, t. 216-220 5 t.

    Allbwn ymchwil: Cyfraniad at gyfnodolynSylw/Dadladolygiad gan gymheiriaid

  27. Cyhoeddwyd

    Emotions and War in Chaucer's 'Knight's Tale'

    Radulescu, R., Maw 2021, Literature, Emotions, and Pre-Modern War: Conflict in Medieval and Early Modern Culture. Lynch, C. & Scott, A. (gol.). ARC Humanities Press, t. 45-63 18 t.

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

  28. Cyhoeddwyd

    Growth of marine ectotherms is regionally constrained and asymmetric with latitude

    Reed, A. J., Godbold, J., Grange, L. & Solan, M., Maw 2021, Yn: Global Ecology and Biogeography. 30, 3, t. 578-589

    Allbwn ymchwil: Cyfraniad at gyfnodolynErthygladolygiad gan gymheiriaid

  29. Cyhoeddwyd

    Justice in Wales

    Nason, S., Maw 2021, Senedd Cymru. 40 t.

    Allbwn ymchwil: Llyfr/AdroddiadAdroddiad Comisiwn

  30. Cyhoeddwyd

    KASP™ based markers reveal a population sub-structure in temperate rice (Oryza sativa L.) germplasm and local landraces grown in the Kashmir valley, north-western Himalayas

    Shikari, A. B., Najeeb, S., Khan, G., Mohidin, F. A., Shah, A. H., Nehvi, F. A., Wani, S. A., Bhat, N. A., Waza, S. A., Subba Roa, L. V., Steele, K. & Witcombe, J., Maw 2021, Yn: Genetic Resources and Crop Evolution. 68, 3, t. 821–834

    Allbwn ymchwil: Cyfraniad at gyfnodolynErthygladolygiad gan gymheiriaid

  31. Lifestyle of health & sustainability: The hospitality sector's response to a new market segment

    Osti, L. & Goffi, G., Maw 2021, Yn: Journal of Hospitality and Tourism Management. 46, t. 360-363 4 t.

    Allbwn ymchwil: Cyfraniad at gyfnodolynErthygladolygiad gan gymheiriaid

  32. Cyhoeddwyd

    Reintegration Of Crop-Livestock Systems In Europe : An Overview

    Schut, A. G. T., Cooledge, E., Moraine, M., van de Ven, G. W. J., Jones, D. L. & Chadwick, D., Maw 2021, Yn: Frontiers of Agricultural Science and Engineering. 8, 1, t. 111-129 18 t.

    Allbwn ymchwil: Cyfraniad at gyfnodolynErthygladolygiad gan gymheiriaid

  33. Cyhoeddwyd

    Status of primary and secondary mental healthcare of people with severe mental illness: an epidemiological study from the UK PARTNERS2 programme

    Reilly, S., Marchevsky, N., Green, M., Davies, L., Plappert, H., Allard, J., Rawcliffe, T., Gibson, J., Clark, M., Pinfold, V., Gask, L., Huxley, P., Byng, R. & Birchwood, M., Maw 2021, Yn: British Journal of Psychiatry. 7, 2, e53.

    Allbwn ymchwil: Cyfraniad at gyfnodolynErthygladolygiad gan gymheiriaid

  34. Cyhoeddwyd

    Teaching early numeracy to students with autism using a school staff delivery model

    Apanasionok, M. M., Alallawi, B., Grindle, C. F., Hastings, R. P., Watkins, R. C., Nicholls, G., Maguire, L. & Staunton, D., Maw 2021, Yn: British Journal of Special Education. 48, 1, t. 90-111 22 t.

    Allbwn ymchwil: Cyfraniad at gyfnodolynErthygladolygiad gan gymheiriaid

  35. Cyhoeddwyd

    Temperature-dependent competitive outcomes between the fruit flies Drosophila santomea and Drosophila yakuba

    Comeault, A. & Matute, D. R., Maw 2021, Yn: American Naturalist. 197, 3, t. 312-323 12 t.

    Allbwn ymchwil: Cyfraniad at gyfnodolynErthygladolygiad gan gymheiriaid

  36. The impact of hyperbole on perception of victim testimony

    Desai, S., Mclean, J., Lawrence, C. & Filik, R., Maw 2021, Yn: Journal of Pragmatics. 174, t. 143-156

    Allbwn ymchwil: Cyfraniad at gyfnodolynErthygladolygiad gan gymheiriaid

  37. Cyhoeddwyd

    The impact of menstrual-cycle phase on basal and exercise-induced hormones, mood, anxiety and exercise performance in physically-active women

    Paludo, A-C., Cook, C., Owen, J., Woodman, T., Irwin, J. & Crewther, B., Maw 2021, Yn: Journal of Sports Medicine and Physical Fitness. 61, 3, t. 461-467

    Allbwn ymchwil: Cyfraniad at gyfnodolynErthygladolygiad gan gymheiriaid

  38. Cyhoeddwyd

    The utility of Amies charcoal bacteriology swabs for storage of canine urine prior to culture

    Olivares, G., Hermes, D., Manzanilla, E., Hughes, K., Clarke, L. & Warland, J., Maw 2021, Yn: JOURNAL OF SMALL ANIMAL PRACTICE. 62, 3, t. 216-222

    Allbwn ymchwil: Cyfraniad at gyfnodolynErthygladolygiad gan gymheiriaid

  39. Cyhoeddwyd

    Training future generations to deliver evidence-based conservation and ecosystem management

    Downey, H., Amano, T., Cadotte, M., Cook, C. N., Cooke, S. J., Haddaway, N. R., Jones, J. P. G., Littlewood, N., Walsh, J. C., Abrahams, M. I., Adum, G., Akasaka, M., Alves, J. A., Antwis, R. E., Arellano, E. C., Axmacher, J., Barclay, H., Batty, L., Benítez-López, A., Bennett, J. R., Berg, M. J., Bertolino, S., Biggs, D., Bolam, F. C., Bray, T., Brook, B. W., Bull, J. W., Burivalova, Z., Cabeza, M., Chauvenet, A. L. M., Christie, A. P., Cole, L., Cotton, A. J., Cotton, S., Cousins, S. A. O., Craven, D., Cresswell, W., Cusack, J. J., Dalrymple, S. E., Davies, Z. G., Diaz, A., Dodd, J. A., Felton, A., Fleishman, E., Gardner, C. J., Garside, R., Ghoddousi, A., Gilroy, J. J., Gill, D. A., Gill, J. A., Glew, L., Grainger, M. J., Grass, A. A., Greshon, S., Gundry, J., Hart, T., Hopkins, C. R., Howe, C., Johnson, A., Jones, K. W., Jordan, N. R., Kadoya, T., Kerhoas, D., Koricheva, J., Lee, T. M., Lengyel, S., Livingstone, S. W., Lyons, A., McCabe, G., Millett, J., Strevens, C. M., Moolna, A., Mossman, H. L., Mukherjee, N., Muñoz-Sáez, A., Negrões, N., Norfolk, O., Osawa, T., Papworth, S., Park, K. J., Pellet, J., Phillott, A. D., Plotnik, J. M., Priatna, D., Ramos, A. G., Randall, N., Richards, R. M., Ritchie, E. G., Roberts, D. L., Rocha, R., Rodríguez, J. P., Sanderson, R., Sasaki, T., Savilaakso, S., Sayer, C., Sekercioglu, C., Senzaki, M., Smith, G., Smith, R. J., Soga, M., Soulsbury, C. D., Steer, M. D., Stewart, G., Strange, E. F., Suggitt, A. J., Thompson, R. R. J., Thompson, S., Thornhill, I., Trevelyan, R. J., Usieta, H. O., Venter, O., Webber, A. D., White, R. L., Whittingham, M. J., Wilby, A., Yarnell, R. W., Zamora, V. & Sutherland, W. J., Maw 2021, Yn: Ecological Solutions and Evidence. 2, 1, t. e12032

    Allbwn ymchwil: Cyfraniad at gyfnodolynErthygladolygiad gan gymheiriaid

  40. Cyhoeddwyd

    Ultrafast femtosecond laser micro-marking of single-crystal natural diamond by two-lens focusing system

    Joya, Y., Yan, B., James, K., Yue, L., Middleburgh, S. & Wang, J., Maw 2021, Yn: Materials Today Communications. 26, 7 t., 101800.

    Allbwn ymchwil: Cyfraniad at gyfnodolynErthygladolygiad gan gymheiriaid

  41. Cyhoeddwyd

    Using Architecture to Think Ourselves into Being: Buildings as Storehouses of Unconscious Thought

    Huskinson, L., Maw 2021, Analytical Psychology and the Human Sciences. Routledge Taylor & Francis, t. 102-140 38 t.

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

  42. Cyhoeddwyd

    What role should randomized control trials play in providing the evidence base for conservation?

    Pynegar, E. L., Gibbons, J. M., Asquith, N. M. & Jones, J. P. G., Maw 2021, Yn: Oryx. 55, 2, t. 235-244

    Allbwn ymchwil: Cyfraniad at gyfnodolynErthygladolygiad gan gymheiriaid

  43. Cyhoeddwyd

    An Empirical Study of the Frequency and Distribution of Judicial Review in Resolving Public Procurement Disputes: Proposals for Legal and Policy Reform

    Clear, S. & Cahill, D., 1 Maw 2021, Yn: European Public Law . 27, 1, t. 131-166 43 t.

    Allbwn ymchwil: Cyfraniad at gyfnodolynErthygladolygiad gan gymheiriaid

  44. Assessing Social Equity in Farmer-Managed Natural Regeneration (FMNR) Interventions: Findings from Ghana

    Kandel, M., Agaba, G., Alare, R. S., Addoah, T. & Schreckenberg, K., 1 Maw 2021, Yn: ECOLOGICAL RESTORATION. 39, 1-2, t. 64-76

    Allbwn ymchwil: Cyfraniad at gyfnodolynErthygladolygiad gan gymheiriaid

  45. Climate-driven carry-over effects negatively influence population growth rate in a food-caching boreal passerine

    Sutton, A. O., Strickland, D., Freeman, N. E. & Norris, D. R., 1 Maw 2021, Yn: Global Change Biology. 27, 5

    Allbwn ymchwil: Cyfraniad at gyfnodolynErthygladolygiad gan gymheiriaid

  46. Cyhoeddwyd

    Collaboration for innovative routes to market: COVID-19 and the food system

    Prosser, L., Lane, E. & Jones, R., 1 Maw 2021, Yn: Agricultural Systems. 188

    Allbwn ymchwil: Cyfraniad at gyfnodolynErthygladolygiad gan gymheiriaid

  47. Cyhoeddwyd

    Connecting high‐throughput biodiversity inventories: Opportunities for a site‐based genomic framework for global integration and synthesis

    Arribas, P., Andujar, C., Bidartondo, M. I., Bohmann, K., Coissac, E., Creer, S., deWaard, J. R., Elbrecht, V., Ficetola, G. F., Goberna, M., Kennedy, S., Krehenwinkel, H., Leese, F., Novotny, V., Ronquist, F., Yu, D. W., Zinger, L., Creedy, T. J., Meramveliotakis, E., Noguerales, V., Overcast, I., Morlon, H., Vogler, A. P., Papadopoulou, A. & Emerson, B. C., 1 Maw 2021, Yn: Molecular Ecology. 30, 5, t. 1120-1135 16 t.

    Allbwn ymchwil: Cyfraniad at gyfnodolynErthygladolygiad gan gymheiriaid

  48. Cyhoeddwyd

    Evaluating impact using time-series data

    Wauchope, H. S., Amano, T., Geldmann, J., Johnston, A., Simmons, B. I., Sutherland, W. J. & Jones, J. P. G., 1 Maw 2021, Yn: Trends in Ecology and Evolution. 36, 3, t. 196-205

    Allbwn ymchwil: Cyfraniad at gyfnodolynErthygladolygiad gan gymheiriaid

  49. Cyhoeddwyd

    Interface properties of Ti3SiC2/Al2O3 ceramics: Combined experiments and first-principles calculations

    Ji, J., Yu, J., Lee, B., Middleburgh, S., Li, D., Wang, X., Li, Q., Wang, Z., Shi, G., Chen, F. & Zhang, L., 1 Maw 2021, Yn: Ceramics International. 47, 5, t. 6409-6417

    Allbwn ymchwil: Cyfraniad at gyfnodolynErthygladolygiad gan gymheiriaid

  50. Long-term Observations Reveal Environmental Conditions and Food Supply Mechanisms at an Arctic Deep-Sea Sponge Ground

    Hanz, U., Roberts, E. M., Duineveld, G., Davies, A., van Haren, H., Rapp, H. T., Reichart, G-J. & Mienis, F., 1 Maw 2021, Yn: Journal of Geophysical Research-Oceans. 126, 3, e2020JC016776.

    Allbwn ymchwil: Cyfraniad at gyfnodolynErthygladolygiad gan gymheiriaid

  51. Cyhoeddwyd

    Microbial enzyme activity and stoichiometry signal the effects of agricultural intervention on nutrient cycling in peatlands

    Qin, L., Freeman, C., Jia, X., Zhang, Z., Liu, B., Zhang, S. & Jiang, M., 1 Maw 2021, Yn: Ecological Indicators. 122, 107242.

    Allbwn ymchwil: Cyfraniad at gyfnodolynErthygladolygiad gan gymheiriaid