1. Cyhoeddwyd

   Impaired maturation of dendritic spines without disorganisation of cortical cell layers in mice lacking NRG1/ErbB signaling in the central nervous system.

   Barros, C. S., Calabrese, B., Chamero, P., Roberts, A. J., Korzus, E., Lloyd, K., Stowers, L., Mayford, M., Halpain, S. & Muller, U., 17 Maw 2009, Yn: Proceedings of the National Academy of Sciences of the USA. 106, 11, t. 4507-4512

   Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid

2. Cyhoeddwyd

   β1 integrins are required for normal CNS myelination and promote AKT-dependent myelin outgrowth.

   Barros, C. S., Nguyen, T., Spencer, K. S., Nishiyama, A., Colognato, H. & Muller, U., 15 Awst 2009, Yn: Development. 136, 16, t. 2717-2724

   Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid

3. Cyhoeddwyd

   The genetic architecture of male colour differences between a sympatric Lake Malawi cichlid species pair.

   Barson, N. J., Knight, M. E. & Turner, G. F., 1 Ion 2007, Yn: Journal of Evolutionary Biology. 20, 1, t. 45-53

   Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid

4. Cyhoeddwyd

   The effects of population management on wild ungulates: A systematic map of evidence for UK species

   Barton, O., Gresham, A., Healey, J., Cordes, L. & Shannon, G., 10 Meh 2022, Yn: PLoS ONE. 17, 6, 26 t., e0267385.

   Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid

5. Cyhoeddwyd

   Predicting the spatial expansion of an animal population with presence-only data

   Barton, O., Healey, J., Cordes, L., Davies, A. & Shannon, G., Tach 2023, Yn: Ecology and Evolution. 13, 11, t. e10778 e10778.

   Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid

6. Cyhoeddwyd

   Global Linkage Map Connects Meiotic Centromere Function to Chromosome Size in Budding Yeast

   Baryshnikova, A., VanderSluis, B., Costanzo, M., Myers, C. L., Cha, R. S., Andrews, B. & Boone, C., 1 Hyd 2013, Yn: G3: Genes, Genomes, Genetics. 3, 10, t. 1741-1751

   Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid

7. Cyhoeddwyd

   Impact of Sediment Concentration on the Survival of Wastewater-Derived blaCTX-M-15-Producing E. coli, and the Implications for Dispersal into Estuarine Waters

   Bashawri, Y. M. A., Robins, P., Jones, D. L., McDonald, J., Cooper, D. & Williams, P., 19 Hyd 2020, Yn: International Journal of Environmental Research and Public Health. 17, 20, 15 t., 7608.

   Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid

8. Cyhoeddwyd

   Evaluation of a novel ELISA test using synthetic mycolic acid antigens for serodiagnosis of non-tuberculous mycobacterial (NTM) infections

   Bashford, J., Flowers, W., Haworth, C., Ryan, J., Cervi, A., Dulayymi, J. R. A., Mason, P. S., Plank, A., Baird, M. & Floto, A., Maw 2023, Yn: Thorax. 78, 3, t. 309-312 4 t.

   Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid

9. Cyhoeddwyd

   Microbial diversity dynamics during the self-acidification of dairy slurry

   Bastami, M. S., Jones, D. L. & Chadwick, D. R., 16 Gorff 2021, Yn: Environmental Technology. 42, 16, t. 2562-2572 11 t.

   Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid

10. Cyhoeddwyd

    Do Effective Micro-Organisms Affect Greenhouse Gas Emissions from Slurry Crusts?

    Bastami, M. S. B., Chadwick, D. & Jones, D., 1 Maw 2016, Yn: Journal of Advanced Agricultural Technologies. 3, 1

    Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid

11. Cyhoeddwyd

    Reduction of Methane Emission during Slurry Storage by the Addition of Effective Microorganisms and Excessive Carbon Source from Brewing Sugar

    Bastami, M. S. B., Jones, D. L. & Chadwick, D. R., 1 Tach 2016, Yn: Journal of Environmental Quality. 45, 6, t. 2016-2022

    Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid

12. Cyhoeddwyd

    Proposal that the arsenite-oxidizing organisms, Thiomonas cuprina and 'Thiomonas arsenivorans' be reclassified as strains of Thiomonas delicata.

    Battaglia-Brunet, F., El Achbouni, H., Quemeneur, M., Hallberg, K. B., Kelly, D. P. & Joulian, C., 7 Ion 2011, Yn: International Journal of Systematic and Evolutionary Microbiology.

    Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid

13. Cyhoeddwyd

    Oxidation of arsenite by Thiomonas strains and characterization of Thiomonas arsenivorans sp nov.

    Battaglia-Brunet, F., Joulian, C., Garrido, F., Dictor, M. C., Morin, D., Coupland, K., Johnson, D. B., Hallberg, K. B. & Baranger, P., 1 Ion 2006, Yn: Antonie Van Leeuwenhoek International Journal of General and Molecular Microbiology. 89, 1, t. 99-108

    Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid

14. Cyhoeddwyd

    Agro-Biodiversity Management: Using Indigenous Knowledge to Cope with Climate Change in the Middle-Hills of Nepal

    Baul, T. K. & McDonald, M. A., 21 Chwef 2014, Yn: Agricultural Research. 3, 1, t. 41-52

    Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid

15. Cyhoeddwyd

    Bacillus indicus and Bacillus subtilis as alternative health and colouration promoters to synthetic astaxanthin in cyprinid aquaculture species.

    Baumgärtner, S., Creer, S., Jones, C., James, J. & Ellison, A., 15 Ion 2024, Yn: Aquaculture. 578, 740016.

    Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid

16. 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 gyfnodolyn › Erthygl › adolygiad gan gymheiriaid

17. Cyhoeddwyd

    Characteristics of nanocrystalline thin films of cadmium sulphide deposited at the water-oil interface

    Baxter, S., Albrasi, E., Kelly, A. J., Johal, S. & Prabhakar, J. T., 15 Meh 2017, Yn: Journal of Colloid and Interface Science. 496, t. 474-478

    Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid

18. Cyhoeddwyd

    The role of ligands in mediating charge transport in nanocrystalline medium

    Baxter, S. & Thomas, P. J., 8 Awst 2017, Nanoscience. Thomas, P. J. & Revaprasadu, N. (gol.). Royal Society of Chemistry, Cyfrol 4. t. 169-184 15 t. (Specialist Periodical Report).

    Allbwn ymchwil: Pennod mewn Llyfr/Adroddiad/Trafodion Cynhadledd › Pennod

19. Cyhoeddwyd

    Regenerated trees in farmers’ fields increase soil carbon across the Sahel

    Bayala, J., Sanou, J., Bazié, HR., Coe, R., Kalinganire, A. & Sinclair, FL., 25 Mai 2019, Yn: Agroforestry Systems. 94, t. 401-415

    Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid

20. Cyhoeddwyd

    Advances in knowledge of processes in soil–tree–crop interactions in parkland systems in the West African Sahel: A review

    Bayala, J., Sanou, J., Teklehaimanot, Z., Quedraogo, S. J., Kalinganire, A., Coe, R. & van Noordwijk, M., 11 Maw 2015, Yn: Agriculture, Ecosystems and Environment. 205, t. 25-35

    Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid

21. Cyhoeddwyd

    Managing Parkia biglobosa and Vitellaria paradoxa prunings for crop production and improved soil properties in the sub-sudanian zone of Burkina Faso.

    Bayala, J., Mando, A., Ouedraogo, S. J. & Teklehaimanot, Z., 1 Gorff 2003, Yn: Arid Land Research and Management. 17, 3, t. 283-296

    Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid

22. Cyhoeddwyd

    Relative contribution of trees and crops to soil carbon content in a parkland system in Burkina Faso using variations in natural 13C abundance.

    Bayala, J., Balesdent, J., Marol, C., Zapata, F., Teklehaimanot, Z. & Ouedraogo, S. J., 1 Tach 2006, Yn: Nutrient Cycling in Agroecosystems. 76, 2-3, t. 193-201

    Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid

23. Cyhoeddwyd

    Nutrient release from decomposing leaf mulches of karité (Vitellaria paradoxa) and néré (Parkia biglobosa) under semi-arid conditions in Burkina Faso, West Africa.

    Bayala, J., Mando, A., Teklehaimanot, Z. & Ouedraogo, S. J., 1 Maw 2005, Yn: Soil Biology and Biochemistry. 37, 3, t. 533-539

    Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid

24. Cyhoeddwyd

    Rejuvenating indigenous trees in agroforestry parkland systems for better fruit production using crown pruning.

    Bayala, J., Ouedraogo, S. J. & Teklehaimanot, Z., 1 Maw 2008, Yn: Agroforestry Systems. 72, 3, t. 187-194

    Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid

25. Cyhoeddwyd

    Separating the tree-soil-crop interactions in agroforestry parkland systems in sapone (Burkina faso) using WaNuLCAS.

    Bayala, J., Van Noordwijk, M., Lusiana, B., Ni'matul, K., Teklehaimanot, Z., Ouedraogo, S. J., Jose, S. (gol.) & Gordon, A. M. (gol.), 1 Ion 2008, Toward Agroforestry Design: An Ecological Approach. 2008 gol. Springer, t. 285-300

    Allbwn ymchwil: Pennod mewn Llyfr/Adroddiad/Trafodion Cynhadledd › Pennod

26. Cyhoeddwyd

    Fine root distribution of pruned trees and associated crops in a parkland system in Burkina Faso.

    Bayala, J., Teklehaimanot, Z. & Ouedraogo, S. J., 1 Ion 2004, Yn: Agroforestry Systems. 60, 1, t. 13-26

    Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid

27. Cyhoeddwyd

    Millet production under pruned tree crowns in a parkland system in Burkina Faso.

    Bayala, J., Teklehaimanot, Z. & Ouedraogo, S. J., 1 Gorff 2002, Yn: Agroforestry Systems. 54, 3, t. 203-214

    Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid

28. Cyhoeddwyd

    How "good" is half a fish? Communicating outcomes of quantitative syntheses to decision makers

    Bayliss, H. R., Lortie, C. J. & Stewart, G. B., 1 Rhag 2015, Yn: Frontiers in Ecology and the Environment. 13, 10, t. 533-534

    Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid

29. Cyhoeddwyd

    Environment and Rural Affairs Monitoring & Modelling Programme (ERAMMP). ERAMMP Report-37: National Forest in Wales - Evidence Review Annex-5: Ecosystem Services. Report to Welsh Government (Contract C210/2016/2017)

    Beauchamp, K., O'Brien, L., Hall, C., Swetnam, R. D., Jenkins, T., Doick, K. J., Nisbet, T., Old, G. H., Evans, C. D., Nicoll, B., Jones, L., Braban, C. F., Robinson, D. A., Burton, V., Dickie, I. A., Tye, A., Smith, A., Pagella, T. & Perks, M. P., 28 Awst 2020, 90 t. Centre for Ecology & Hydrology .

    Allbwn ymchwil: Cyfraniad arall › Cyfraniad Arall

30. Cyhoeddwyd

    Environment and Rural Affairs Monitoring & Modelling Programme (ERAMMP): ERAMMP Report-32: National Forest in Wales - Evidence Review. Report to Welsh Government (Contract C210/2016/2017)

    Beauchamp, K., Jenkins, T., Alison, J., Bathgate, S., Bell, C., Braban, C. F., Broome, A., Bursnell, M., Burton, V., Dickie, I. A., Doick, K. J., Evans, C. D., Fitch, A., Griffiths, R., Hall, C., Healey, J., Jones, L., Keith, A. M., Kerr, G., Kuyer, J., Maskell, L. C., Matthews, R. W., Morison, J., Nicoll, B., Nisbet, T., O'Brien, L., Old, G. H., Pagella, T., Perks, M. P., Robinson, D. A., Saraev, V., Smart, S. M., Smith, A., Siriwardena, G. M., Swetnam, R. D., Thomas, A. R. C., Tye, A., Valatin, G., Warren-Thomas, E., Wong, J. & Emmett, B. A., 28 Awst 2020, 46 t. Centre for Ecology & Hydrology .

    Allbwn ymchwil: Cyfraniad arall › Cyfraniad Arall

31. Cyhoeddwyd

    Mapping the growth of the Welsh Food Bank Landscape 1998-2015

    Beck, D., Lane, E. E., Gwilym, H. M., Harris, I. & Gwilym, H., 23 Chwef 2016, Bangor University.

    Allbwn ymchwil: Cyfraniad arall › Cyfraniad Arall

32. Cyhoeddwyd

    Plio-Pleistocene phylogeography of the Southeast Asian blue panchax killifish, Aplocheilus panchax.

    Beck, S., Carvalho, G., Barlow, A., Ruber, L., Tan, H. H., Nugroho, E., Wowor, D., Nor, S. A. M., Herder, F., Muchlisin, Z. A. & De Bruyn, M., 25 Gorff 2017, Yn: PLoS ONE.

    Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid

33. Cyhoeddwyd

    Synthesis of B-Aryl Boron-Sulphur Heterocycles from Arylborondibromides

    Beckett, M. A. & Minton, P. R., 1994, Yn: Phosphorus Sulfur and Silicon and the Related Elements. 93, 1-4, t. 461-462 2 t.

    Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid

34. Cyhoeddwyd

    Synthesis and characterization of triarylborthiins, Ar3B3S3 (Ar = 4-MeC6H4, 3-MeC6H4, 2-MeC6H4, 4-EtC6H4 and 3,5-Me2C6H3)

    Beckett, M. A., Minton, P. R. & Werschkun, B., 1994, Yn: Journal of Organometallic Chemistry. 468, 1-2, t. 37-41 5 t.

    Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid

35. Cyhoeddwyd

    Synthesis and spectroscopic characterization of 3,5-diaryl-cyclo-1,2,4-trithia-3,5-diborolanes, Ar2B2S3 (Ar  Ph, 2-MeC6H4, 3-MeC6H4, 4-MeC6H4, 4-EtC6H4, 3,5-Me2C6H3), and some related chemistry of boron-sulphur heterocyclic species

    Beckett, M. A. & Minton, P. R., Chwef 1995, Yn: Journal of Organometallic Chemistry. 487, 1-2, t. 209-214 6 t.

    Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid

36. Cyhoeddwyd

    The kinetics of the oxidation of 1-phenylethanol catalysed by Co(II)(salen) with triphenylphosphine

    Beckett, M. A. & Homer, R. B., 1986, Yn: Inorganica Chimica Acta. 115, 1, t. L25-L27

    Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid

37. Cyhoeddwyd

    Preparation, crystal and molecular structure of, and NMR parameters for, the exopolyhedral heterocyclic platinaundecaborane [μ-2,7-(SCSNEt2)-7-(PMe2Ph)-NIDO-7-PtB10H11]

    Beckett, M. A., Greenwood, N., Kennedy, J. D. & Thorntonpett, M., 1985, Yn: Polyhedron. 4, 3, t. 505-511 7 t.

    Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid

38. Cyhoeddwyd

    Correlation of thallium–boron nuclear spin states by two-dimensional n.m.r. spectroscopy: magnitudes and relative signs of couplings nJ(205Tl–11B) in the nido-thallaundecaborane anion [Me2TlB10H12]–.

    Beckett, M. A., Kennedy, J. D. & Howarth, O. W., 1985, Yn: Journal of the Chemical Society, Chemical Communications. 13, t. 855-856 2 t.

    Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid

39. Cyhoeddwyd

    Protodeboronation of arylboronic acids and triarylboroxines in Bu20/THF

    Beckett, M. A., Gilmore, R. J. & Idrees, K., 1993, Yn: Journal of Organometallic Chemistry. 455, 1-2, t. 47-49 3 t.

    Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid

40. Cyhoeddwyd

    The interaction of benzyl alcohol with trimethoxyboroxine: Amine adducts of triarylboroxines as model compounds

    Beckett, M. A., Owen, P., Strickland, G. C. & Sukumar Varma, K., 1997, Yn: Phosphorus, Sulfur and Silicon and the Related Elements. 124, t. 509-512 4 t.

    Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid

41. Cyhoeddwyd

    Synthesis, molecular structures, and nuclear magnetic resonance properties of the macropolyhedral metallaboranes [(PMe2Ph)4Pt3B14H16] and [(PMe2Ph)PtB16H18(PMe2Ph)], and a discussion of the bonding at platinum in these and some related platinaborane clusters

    Beckett, M. A., Crook, J. E., Greenwood, N. N. & Kennedy, J. D., 1986, Yn: Journal of the Chemical Society Dalton Transactions. 9, t. 1879-1893 15 t.

    Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid

42. Cyhoeddwyd

    Amine adducts of triarylboroxines: Synthesis and characterization of adducts of tri(2-tolyl)boroxine and crystal structures of (4-MeC6H4)(3)B3O3 and (4-MeC6H4)(3)B3O3.4-picoline

    Beckett, M. A., Strickland, G. C., Sukumar Varma, K., Hibbs, D. E., Hursthouse, M. B. & Abdul Malik, K. M., Mai 1997, Yn: Journal of Organometallic Chemistry. 535, 1-2, t. 33-41 9 t.

    Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid

43. Cyhoeddwyd

    Boron

    Beckett, M. A., 1999, Yn: Annual Reports on the Progress of Chemistry, Vol 95, Section a: Inorganic Chemistry. 95, t. 23-43 21 t.

    Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid

44. Cyhoeddwyd

    Computational studies on gas phase polyborate anions

    Beckett, M. A., Davies, R. A. & Thomas, C. D., 22 Meh 2014, Yn: Computational and Theoretical Chemistry. 1044, t. 74-79

    Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid

45. Cyhoeddwyd

    Synthesis and characterization of a series of Group 7 metal 2,2,2,2-dicarbonylbis (triorganophosphine)-arachno-2-metallatetraboranes, [M(CO)2L2(B3H8)] (M=Re, Mn); crystal and molecular structures of [Re(CO)2(dppf)(B3H8)] (M=Re, Mn); crystal and molecular structures of [Re(CO)2(dppf)(B3H8)] and [Mn(CO)2(dppe)(B3H8)]

    Beckett, M. A., Brassington, D. S., Coles, S. J., Gelbrich, T. & Hursthouse, M. B., 15 Meh 2003, Yn: Polyhedron. 22, 12, t. 1627-1632

    Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid

46. Cyhoeddwyd

    Boron chemistry

    Beckett, M. A., 2 Chwef 2015, Yn: Chemistry International. 37, 1, t. 28

    Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid

47. Cyhoeddwyd

    Boron Hydrides and related compounds

    Beckett, M. A. & Leigh, J. (gol.), 25 Tach 2011, Principles of Chemical Nomenclature: A Guide to IUPAC Recommendations 2011 Edition. 2011 gol. Royal Society of Chemistry

    Allbwn ymchwil: Pennod mewn Llyfr/Adroddiad/Trafodion Cynhadledd › Pennod

48. Cyhoeddwyd

    New developments in boroxine chemistry: metal alkoxide condensation reactions, and diisocyanate polymerization reactions

    Beckett, M. A. (gol.), Rugen-Hankey, M. P. (gol.), Varma, K. S. (gol.) & Bubnov, Y. N. (gol.), 1 Ion 2003, 2003 gol. URSS Scientific Publishers.

    Allbwn ymchwil: Llyfr/Adroddiad › Llyfr

49. Cyhoeddwyd

    Trimethoxyboroxine as an 'oxygen-transfer' reagent: a non-aqueous 'sol-gel' route to alkali-free borosilicate glass

    Beckett, M. A., Rugen-Hankey, M. P. & Varma, K. S., 1 Ion 2000, Yn: Chemical Communications. 16, t. 1499-1500

    Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid

50. Cyhoeddwyd

    Tetraphenylboroxinate(1-) salts of monoborate cations: Synthesis and single-crystal X-ray structures of [Ph2B{OCH2CH2N(Me)(CH2)n}2][Ph4B3O3] (n = 4, 5)

    Beckett, M. A., Bennett, E. L., Horton, P. N. & Hursthouse, M. B., 1 Ebr 2010, Yn: Journal of Organometallic Chemistry. 695, 7, t. 1080-1083

    Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid