Hydrophobins, beer foaming and gushing

Cerevisia

Volumn 35, Issue 4, 2011, Pages 85-101

  Shokribousjein, Zahra ^a   Deckers, Sylvie M ^a   Gebruers, Kurt ^a   Lorgouilloux, Yannick ^b   Baggerman, Geert ^b   Verachtert, Hubert ^a   Delcour, Jan A ^a   Etienne, Pierre ^d   Rock, Jean Marie ^c   Michiels, Christiaan ^a   Derdelinckx, Guy ^a  

^a LEUVEN FOOD SCIENCE AND NUTRITION RESEARCH CENTRE LFORCE   (Belgium)

^b UNIVERSITY OF LEUVEN   (Belgium)

^c Orval Brewery   (Belgium)

^d Orval Brewery ^*  (Belgium)

Author keywords

Foaming; Gushing; Hop extract; Hydrophobins; Microbubbles

Indexed keywords

FOAMING; GUSHING; HOP EXTRACT; HYDROPHOBINS; MICROBUBBLES;

AMINO ACIDS; HYDROPHOBICITY; NANOSTRUCTURES;

CARBON DIOXIDE;

EID: 79951492227     PISSN: 13737163     EISSN: None     Source Type: Journal    
DOI: 10.1016/j.cervis.2010.12.001     Document Type: Review

References (121)

1. B. Allen, J. Wu, and H. Doan Inactivation of fungi associated with barl (Pubitemid 36959413)
2. B.J. Anness, and R.J.R. Reed Lipids in wort J. Inst. Brew. 91 1985 313 317
3. H.W. Archibald, J.P. Weiner, and L. Taylor Observations on factors affecting beer foam characteristics Brewer 74 1988 349 362
4. K. Asano, and N. Hashimoto Contribution of hop bitter substances to head formation of beer. 1976 Report of the Research Laboratories of Kirin Brewery Co., Ltd., 19 pp. 9-16
5. C.W. Bamforth The foaming properties of beer J. Inst. Brew. 91 1985 370 383
6. C.W. Bamforth The relative significance of physics and chemistry for beer foam excellence: theory and practice J. Inst. Brew. 110 2004 259 266 (Pubitemid 40359578)
7. G.S. Barker, B. Jefferson, and S.J. Judd The control of bubble size in carbonated beverages Chem. Eng. Sci. 57 2002 565 573 (Pubitemid 34195937)
8. L.M. Bech, P. Vaag, B. Heinemann, and K. Breddam Throughout the brewing process barley lipid transfer protein 1 LTP1 is transformed into a more foam promoting form Proceedings of the European Brewing Convention Congress, Brussels, 25 1995 561 568
9. P.H. Blum Lipids in malting and brewing Brew. Dig. 44 1969 58 63
10. P. Boivin, and M. Malanda Improvement of malt quality and safety by adding starter culture during the malting process MBAA Tech. Quart. 34 2 1997 96 101
11. M.W. Brenner Gushing Beer II. Causes and some means of prevention Proceedings of the European Brewery Convention Congress, 6 1957 349 362
12. E.R. Brierley, P.J. Wilde, A. Oniski, P.S. Hughes, W.J. Simpson, and D.C. Clarke The influence of ethanol on the foaming properties of beer protein fractions: a composition of rudin and microconductivity methods of foam assessment J. Sci. Food Agric. 70 1996 531 537 (Pubitemid 126677437)
13. M. Burger, and K. Becker Oxalate studies on beer Proceedings of the American Society of Brewing Chemists 1949 102 115
14. R. Carrington, C.R. Collett, I.R. Dunkin, and G. Halek Gushing promoters and suppressants in beer and hops J. Inst. Brew. 78 1972 243 254
15. T.C.N. Carroll The effect of dissolved nitrogen gas on beer foam and palate Master Brewers Association of the Americas Technical Quarterly 16 1979 116 119
16. M. Christian, V. Ilberg, A.A. Aydin, J. Titze, A. Friess, F. Jacob, and H. Parlar New gushing mechanism proposed by applying particle size analysis and several surfactants Brew. Sci. 62 2009 100 107
17. M. Christian, J. Titze, V. Ilberg, and F. Jacob Combined particle analysis as a new tool to predict gushing shown with alcohol-free beverage products Brew. Sci. 63 2010 72 79
18. A.R. Cox, D.L. Aldred, and A.B. Russell Exceptional stability of food foams using class II hydrophobin HFBII Food Hydrocolloids 23 2009 366 376
19. A. Curioni, G. Pressi, L. Furegon, and A.D.B. Peruffo Major proteins of beer and their precursors in barley: electrophoretic and immunological studies J. Agric. Food Chem. 43 1995 2620 2626
20. J. De Clerck Dernier cours magistral du Professeur Jean De Clerck Bull. ARAEBULouvain/KVOSBULeuven alumni 69 2 1973 25 47
21. 2-hydrophobin structures acting as nanobombs in beer Brew. Sci. 63 2010 54 61
22. 2-hydrophobin structures and study the primary gushing potential of beer. J. Am. Soc. Brew. Chem., in press.
23. A.E. Desjardins Selected mycotoxigenic Fusarium species. Fusarium mycotoxins: chemistry Genetics and Biology 2006 American Phytopathological Society Press St Paul, MN pp. 145-194
24. J.P. Douliez, T. Michon, K. Elmorjani, and D. Marion Structure, biological and technological functions of lipid transfer proteins and indolines, the major lipid transfer proteins from cereal kernels J. Cereal Sci. 32 1999 1 20 (Pubitemid 30613389)
25. A.C. Douma, H.C.M. Mocking-Bode, M. Kooijman, E. Stolzenbach, R. Orsel, A.C.A.P.A. Bekkers, and S.A.G.F. Angelino Identification of foam stabilizing proteins under conditions of normal beer dispense and their biochemical and physiochemical properties Proceedings of the European Brewing Convention Congress, Maastrict, 26 1997 671 679
26. M. Draeger Physikalische Uberlegungen zum thema gushing Brauwelt 136 1996 259 264
27. A. Dutta, A. Chengara, A.D. Nikolov, D.T. Wasan, K. Chen, and B. Campbell Destabilization of aerated food products: effects of Ostwald ripening and gas diffusion J. Food Eng. 62 2004 177 184
28. D.E. Evans, and C.W. Bamforth Beer foam: achieving a suitable head Bamforth W. Charles, I. Russell, G. Stewart, Handbook of Alcoholic Beverages Series, Beer A Quality perspective 2009 Elsevier Ltd. 1 60 Chapter 1
29. D.E. Evans, and J. Hejgaard The impact of malt derived proteins on beer foam quality. Part I. The effect of germination and kilning on the level of protein Z4, protein Z7 and LTP1 J. Inst. Brew. 105 1999 159 169 (Pubitemid 129338189)
30. D.E. Evans, and M.C. Sheehan Do not be fobbed off, the substance of beer foam, a review J. Am. Soc. Brew. Chem. 60 2002 47 57 (Pubitemid 34536376)
31. D.E. Evans, H.M. Collins, J.K. Eglinton, and A. Wilhelmson Assessing the impact of the level of diastatic power enzymes and their thermostability on the hydrolysis of starch during wort production to predict malt fermentability J. Am. Soc. Brew. Chem. 63 2005 185 198 (Pubitemid 41698194)
32. Fischer, S., 2001. Blasenbildung von in flüssigkeiten gelösten gasen. Dissertation. TU München.
33. S. Fisher, G. Hauser, and K. Sommer Influence of dissolved gases on foam European Brewing Convention Monograph, XXVII Amsterdam 1999 37 46
34. H. Fruhner, K.D. Wantke, and K. Lunkenheimer Relationship between surface dilational properties and foam stability Colloids Surf. A Physicochem. Eng. Asp. 162 1999 193 202
35. S. Furukubo, M. Shoboyaski, N. Fukui, A. Isoe, and K. Nakatami A new factor which effects the foam adhesion of beer MBAA Tech. Quart. 30 1993 155 158
36. L.A. Garbe, P. Schwarz, and A. Ehmer Beer Gushing Bamforth W. Charles, I. Russell, G. Stewart, Handbook of Alcoholic Beverages Series, Beer A Quality perspective 2009 Elsevier Ltd. 185 212 Chapter 6
37. P. Gjersten Gushing in beer: it's nature, cause and prevention Brew. Dig. 42 5 1967 80 84
38. A. Haikara Gushing induced by fungi European Brewery Convention Monograph VI, Relationship Between Malt and Beer. European Brewery Convention Monograph IV 1980 251 258
39. A. Haikara, T. Sarlin, and S. Home Determination of gushing tendency of malt EBC Press Rep. 111 2 2005 247 (Pubitemid 41530300)
40. Haikara, A., Kleemola, T., Nakari-Setälä, T., Pentillä, M., 2006. Method for determining a gushing factor for a beverage. United States Patent, US 7,041,464 B2.
41. S. Hanke, M. Kern, M. Herrmann, W. Back, Th. Becker, and M. Krottenthaler Suppression of gushing by Hop constituents Brew. Sci. 62 2009 181 186
42. A.D. Haukeli, T.O. Wulff, and S. Lie Practical experiments to improve foam stability Proceedings of the European Brewing Convention Congress, Oslo, 24 1993 365 372
43. H.J. Hektor, and K. Scholtmeijer Hydrophobins: proteins with potential Curr. Opin. Biotechnol. 16 2005 434 439 (Pubitemid 41111530)
44. S. Hippeli, and E.F. Elstner Are hydrophobins and/or non-specific lipid transfer proteins responsible for gushing in beer?. New hypotheses on the chemical nature of gushing inducing factors Z. Naturforsch. 57c 2002 1 8 (Pubitemid 34234324)
45. E. Honno, S. Furukubo, H. Kondo, Y. Ishibaski, N. Fukui, and K. Nakatani Improvement of foam lacing of beer MBAA Tech. Quart. 34 1997 299 301
46. P.S. Hughes, and P.J. Wilde New techniques for the evaluation of interactions in beer foams Proceedings of the European Brewing Convention Congress, Maastricht, 26 1997 525 534
47. Y. Ishibashi, Y. Terano, N. Fukui, N. Honbou, T. Kakui, S. Kawasaki, and K. Nakatami Development of a novel method for determining beer foam and haze proteins by using immunochemical method-ELISA J. Am. Soc. Brew. Chem. 54 1996 177 182 (Pubitemid 126548490)
48. Y. Ishibashi, T. Kakni, Y. Terano, E. Hon-no, A. Kogin, and K. Nakatani Application of ELISA to quantitative evaluation of foam-active protein in the malting and brewing process J. Am. Soc. Brew. Chem. 55 1997 20 23 (Pubitemid 127681936)
49. G. Jackson, and T. Wainright Melanoidins and beer foam J. Am. Soc. Brew. Chem. 36 1978 192 195
50. G. Jackson, R.T. Roberts, and T. Wainright Mechanism of beer foam stabilization by propylene glycol alginate J. Inst. Brew. 86 1980 34 37
51. F. Jacob Calcium oxalsäure: Technologische relevanz Brauwelt 138 28/29 1998 1286 1287
52. S.F. Jones, G.M. Evans, and K.P. Galvin Bubble nucleation from gas cavities - a review Adv. Colloid Interface Sci. 80 1999 27 50
53. J.M. Kallio, M.B. Linder, and J. Rouvinen Crystal structures of hydrophobin hfbii in the presence of detergent implicate the formation of fibrils and monolayer films J. Biol. Chem. 282 39 2007 28733 28739 (Pubitemid 47606017)
54. Kisko, K., 2008. Characterization of hydrophobin proteins at interfaces and in solutions using X-rays. Academic Dissertation. University of Helsinki, Faculty of Science, Department of Physics.
55. N. Kobayashi, S. Segawa, S. Umemoto, H. Kuroda, Y. Mitani, J. Watari, and M. Takashio A new method for evaluating foam-damaging effect by free fatty acids J. Am. Soc. Brew. Chem. 60 2002 37 41 (Pubitemid 34147397)
56. H. Kondo, H. Yomo, S. Fukukubo, Y. Kawasaki, and K. Nakatani Advanced method for measuring proteinase A in beer Proceedings of the 25th Convention, The Institute of Brewing, Asia Pacific Section, Perth 25 1998 119 124
57. B. Kottapalli, C.E. Wolf-Hall, P. Schwarz, J. Schwarz, and J. Gillespie Evaluation of hot water and electron beam irradiation for reducing Fusarium infection in malting barley J. Food Prot. 66 7 2003 1241 1246 (Pubitemid 36844713)
58. B. Kottapalli, C.E. Wolf-Hall, and P. Schwarz Evaluation of gaseous ozone and hydrogen peroxide treatments for reducing Fusarium survival in malting barley J. Food Prot. 68 6 2005 1236 1240 (Pubitemid 40764627)
59. D.R.J. Laws, and J.D. McGuinness Origin and estimation of the gushing potential of isomerized hop extracts J. Inst. Brew. 78 1972 302 308
60. R. Letters Lipids in brewing, friend or foe? Ferment 5 1992 268 274
61. M.J. Lewis, and C.W. Bamforth Essays in Brewing Science 2007 Springer US pp. 28-42, Chapter 4 Foam
62. M.J. Lewis, and A.S. Lewis Correlation of beer foam with other beer properties MBAA Tech. Quart. 40 2003 114 124
63. G. Liger-Belair, G. Polidori, and P. Jeandet Recent advances in the science of champagne bubbles Chem. Soc. Rev. 37 11 2008 2361 2580
64. M.B. Linder Hydrophobins: proteins that self assemble at interfaces Curr. Opin. Colloid Interf. Sci. 14 2009 356 363
65. M.B. Linder, G.R. Szilvay, T. Nakari-Setälä, and M.E. Penttila Hydrophobins: the protein-amphiphiles of filamentous fungi FEMS Microbiol. Rev. 29 2005 877 896 (Pubitemid 41416842)
66. S.O. Lumsdon, J. Green, and B. Stieglitz Adsorption of hydrophobin proteins at hydrophobic and hydrophilic interfaces Colloids Surf. B Biointerf. 44 2005 172 178 (Pubitemid 44302091)
67. L.T. Lusk, H. Goldstein, and D. Ryder Independent role of beer proteins, melanoidins and polysaccarides in foam formation J. Am. Soc. Brew. Chem. 53 1995 93 103
68. L.T. Lusk, C.L. Cronan, P.L. Ting, J. Seabrooks, and D. Ryder An evolving understanding of foam bubbles based upon beer style development Proceedings of the European Brewery Convention Congress, Dublin 29 2003 paper #79
69. D.M. Madigan, I. McMurrough, and M.R. Smyth Determination of oxalate in beer and beer sediments using ion chromatography J. Am. Soc. Brew. Chem. 52 1994 134 137
70. Y. Mitani, M. Joh, S. Segawa, K. Shinotsuka, and K. Ohgaki Dynamic behavior of carbon dioxide gas related to formation and diminution of beer foam J. Am. Soc. Brew. Chem. 60 2002 1 9 (Pubitemid 34147391)
71. B.S. Murray Stabilization of bubbles and foams Curr. Opin. Colloid Interf. Sci. 12 2007 232 241 (Pubitemid 47444546)
72. L. Narziss, E. Reichender, and D. Barth Investigations on the effect of glycoproteidases on foam properties of beer Monatsschrift Brauwiss. 35 1982 275 283
73. L. Narziss, E. Reichender, and D. Barth Concerning the influence of high molecular protein fractions and glycoproteins on beer foam with particular emphasis on technological procedures Monatsschrift Brauwiss. 35 1982 213 223
74. L. Narziss, H. Miedaner, H. Graft, P. Eichhorn, and S. Lusting Technological approach to improve flavour stability MBAA Tech. Quart. 30 1993 48 53
75. T. Neuhof, R. Dieckmann, I.S. Druzhinina, C.P. Kubicek, T. Nakari-Setälä, M. Penttilä, and H. von Döhren Direct identification of hydrophobins and their processing in Trichoderma using intact-cell MALDI-TOF MS FEBS 274 2007 841 852 (Pubitemid 46144043)
76. Y. Nishida, N. Tada, T. Inui, N. Kageyama, S. Furukubo, S. Takaoka, and Y. Kawasaki Innovative control technology of malt components by use of a malt fractionation technique Proceedings of the European Brewery Convention Congress, Prague, 30 2005 93 100
77. J. O'Reilly, and R. Taylor Solubility PGA in beer head retention Brew. Guardian 125 1996 22 24
78. I.H. Ormrod, E.F. Lalor, and F.R. Sharpe The release of yeast proteolytic enzymes into beer J. Inst. Brew. 97 1991 441 443
79. H. Outtrup The relation between the molecular structure and gushing potential of dehydrated humulunic acid Carlsberg Res. Commun. 45 1980 381 388
80. A. Paananen, E. Vuorimaa, M. Torkkeli, M. Penttila, M. Kauranen, O. Ikkala, H. Lemmetyinen, R. Serimaa, and M.B. Linder Structural hierarchy in molecular films of two class II hydrophobins Biochemistry 42 2003 5253 5258 (Pubitemid 36560421)
81. J.J. Palmer How the mash works How to Brew: Everything you Need to Know to Brew Beer Right the First Time 2006 Brewers Association Boulder, CO pp. 141-152
82. M. Parish New research proves effectivness of "Head Keeper" nucleated glassware Brew. Dig. 71 1997 26 27
83. G. Polidori, P. Jeandet, and G. Liger-Belair Bubbles and flow patterns in champagne Am. Sci. 97 July-August 2009 294 301
84. A. Prins, and J.T. van Marle Foam formation in beer: some physics behind it Beer Foam Quality, 26-36, vol. Monograph 27. Amsterdam, The Netherlands, Fachverlag Hans Carl, Nurnberg 1999
85. Rath, F., 2008. Investigations to improve the reproducibility of the "Modified Carlsberg test". Gushing Day, EBC Brewing Science Group-Euromalt-Brussels, Belgium.
86. R.T. Roberts Glycoproteins and beer foam European Brewery Convention Congress, 15 1975 453 464
87. R.T. Roberts, P.J. Keeney, and T. Wainwright The effects of lipids and related materials on beer foam J. Inst. Brew. 84 1978 9 12
88. A.D. Ronteltap, M. Hollemans, C.G.J. Bisperink, and A. Prins Beer foam physics MBAA Tech. Quart. 28 1991 25 32
89. A.D. Rudin Measurement of the foam stability of beers J. Inst. Brew. 63 1957 506 509
90. A.D. Rudin Effect of nickel on the foam stability of beers in relation to their isohumulone contents J. Inst. Brew. 64 1958 238 239
91. A.D. Rudin, and J.R. Hudson Significance of isohumulone and certain metals in gushing beers J. Inst. Brew. 64 1958 317 318
92. K.K. Sahu, Y. Hazama, and K.N. Ishihara Gushing in canned beer: the effect of ultrasonic vibration J. Colloid Interf. Sci. 302 2006 356 362
93. B. Salas, B.J. Steffenson, H.H. Casper, B. Tacke, L.K. Prom, T.G. Fetch Jr., and P.B. Schwarz Fusarium species pathogenic to barley and their associated mycotoxins Plant Dis. 83 1999 667 674
94. T. Sarlin, T. Nakari-Setälä, M. Linder, M. Penttilä, and A. Haikara Fungal hydrophobins as predictors of the gushing activity of malt J. Inst. Brew. 111 2 2005 105 111 (Pubitemid 41530283)
95. T. Sarlin, A. Vilpola, E. Kotaviita, J. Olkku, and A. Haikara Fungal hydrophobins in the barley-to-beer chain J. Inst. Brew. 113 2 2007 147 153
96. R. Schildbach, and J. Müller Einfl üsse der Technologie auf den Oxalatgehalt des Bieres und seiner Rohstoffe Brauwelt 120 1980 1648
97. K. Scholtmeijer, J.G.H. Wessels, and H.A.B. Wösten Fungal hydrophobins in medical and technical applications Appl. Microbiol. Biotechnol. 56 2001 1 8 (Pubitemid 32661535)
98. F. Schur, P. Anderegg, H. Senften, and H. Pfenniger Brautechnologische Bedeutung von Oxalat Brauerei Rundschau 91 1980 201 207
99. P.B. Schwarz Impact of head blight on the malting and brewing quality of barley K.J. Leonard, W.R. Bushnell, Fusarium Head Blight of Wheat and Barley 2003 American Phytopathological Society Press St Paul, MN 395 419
100. P.B. Schwarz, H.H. Casper, and S. Beattie Fate and development of naturally occurring Fusarium mycotoxins during malting and brewing J. Am. Soc. Brew. Chem. 53 3 1995 121 127
101. M.C. Sheehan, and J.H. Skerritt Identification and characterisation of beer polypeptides derived from barley hordeins J. Inst. Brew. 103 1997 297 306
102. C. Shimizu, S. Yokoi, T. Shigyo, and S. Koshimo The mechanism controlling the decrease in beer foam stability using proteinase A Proceedings of the European Brewing Convention Congress, Brussels, 25 1995 569 576
103. W.J. Simpson, and P.S. Hughes Stabilization of foams by hop derived bitter acids. Chemical interactions in beer foam Cerevisiae Biotechnol. 19 1994 39 44
104. K.C. Stowell The effect of various cereal adjustments on the head retention properties of beer Proceedings of the European Brewing Convention Congress, Helsinke, 20 1985 507 513
105. M. Stübner, G. Lutterschmid, R.F. Vogel, and L. Niessen Heterologous expression of the hydrophobin FcHyd5p from Fusarium culmorum in Pichia pastoris and evaluation of its surface activity and contribution to gushing of carbonated beverages Int. J. Food Microbiol. 141 2010 110 115
106. G.R. Szilvay, A. Paananen, K. Laurikainen, E. Vuorimaa, H. Lemmetyinen, J. Peltonen, and M.B. Linder Self-assembled hydrophobin protein films at the air-water interface: structural analysis and molecular engineering Biochemistry 46 2007 2345 2354 (Pubitemid 46370554)
107. G.R. Szilvay, K. Kisko, R. Serimaa, and M.B. Linder The relation between solution association and surface activity of the hydrophobin HFBI from Trichoderma reesei FEBS Lett. 581 2007 2721 2726 (Pubitemid 46829118)
108. N. Tada, T. Inui, N. Kageyama, S. Takaoka, and Y. Kawasaki The influence of malt acrospires on beer taste and foam quality MBAA Tech. Quart. 41 2004 305 309
109. J. Titze, M. Christian, V. Ilberg, and F. Jacob Particle analysis-A combined method to analyze the colloidal characteristics of particles Brew. Sci. 63 2010 62 71
110. P. Vaag, and S. Pederson Practical experiences with immunological techniques for the detection of Fusarium in barley and malt European Brewery Convention Biochemistry and Microbiology Groups Bulletin EBC, Zoeterwoude, Netherlands 1992
111. P. Vaag, R. Preben, A.-D. Knudson, S. Pederson, and E.A. Meiling A simple and rapid test for gushing tendency in brewing materials Proceedings of the European Brewery Convention Congress 24 1993 155 162
112. S.N.E. van Nierop, D.E. Evans, B.C. Axcell, I.C. Cantrell, and M. Rautenbach The impact of different wort boiling temperatures on the beer foam stabilizing properties of lipid transfer protein 1 J. Agric. Food Chem. 52 2004 3120 3129
113. Z.-Y. Wang, G.-Q. He, Z.-S. Liu, H. Ruan, Q.-H. Chen, and H.-P. Xiong Purification of yeast proteinase A from fresh beer and its specificity for foam proteins Int. J. Food Sci. Technol. 40 2005 1 6
114. Weideneder, A., 1992. Untersuchungen zum malzverursachten Wildwerden Gushing des Bieres. Doctoral thesis. Technical University Munich.
115. P.J. Wilde, F.A. Husband, D. Cooper, M.J. Ridout, R.E. Muller, and E.N.C. Mills Destabilisation of beer foam by lipids: structural and interfacial effects J. Am. Soc. Brew. Chem. 61 2003 196 202 (Pubitemid 38062329)
116. H.A.B. Wösten Hydrophobins: multipurpose proteins Annu. Rev. Microbiol. 55 2001 625 646 www.e-malt.com/EMaltSite.asp?Command= PageShow&PageID=56 (Pubitemid 32978118)
117. H.A.B. Wösten, and M.L. de Vocht Hydrophobinns, the fungal coat unravelled Biochim. Biophys. Acta 1469 2000 79 86
118. M.W. Zapf, S. Theisen, R.F. Vogel, and L. Niessen Cloning of wheat LTP1500 and two Fusarium culmorum hydrophobins in Saccharomyces cerevisiae and assessment of their gushing inducing potential in experimental wort fermentation J. Inst. Brew. 112 3 2006 237 245 (Pubitemid 44864082)
119. Zepf, M., 1998. Gushing. Ursachenfi ndung anhand von Modellversuchen. Doctoral thesis. Technical University Munich.
120. M. Zepf, and E. Geiger Gushing problems with calcium oxalate I Brauwelt 139 48 1999 2302 2304
121. M. Zepf, and E. Geiger Gushing problems with calcium oxalate II Brauwelt 140 6/7 2000 222 223