CINXE.COM

<!DOCTYPE html><html lang="en-US"><head><title>Just a moment...</title><meta http-equiv="Content-Type" content="text/html; charset=UTF-8"><meta http-equiv="X-UA-Compatible" content="IE=Edge"><meta name="robots" content="noindex,nofollow"><meta name="viewport" content="width=device-width,initial-scale=1"><style>*{box-sizing:border-box;margin:0;padding:0}html{line-height:1.15;-webkit-text-size-adjust:100%;color:#313131;font-family:system-ui,-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica Neue,Arial,Noto Sans,sans-serif,Apple Color Emoji,Segoe UI Emoji,Segoe UI Symbol,Noto Color Emoji}body{display:flex;flex-direction:column;height:100vh;min-height:100vh}.main-content{margin:8rem auto;max-width:60rem;padding-left:1.5rem}@media (width <= 720px){.main-content{margin-top:4rem}}.h2{font-size:1.5rem;font-weight:500;line-height:2.25rem}@media (width <= 720px){.h2{font-size:1.25rem;line-height:1.5rem}}#challenge-error-text{background-image:url(data:image/svg+xml;base64,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);background-repeat:no-repeat;background-size:contain;padding-left:34px}@media (prefers-color-scheme:dark){body{background-color:#222;color:#d9d9d9}}</style><meta http-equiv="refresh" content="120"></head><body class="no-js"><div class="main-wrapper" role="main"><div class="main-content"><noscript><div class="h2"><span id="challenge-error-text">Enable JavaScript and cookies to continue</span></div></noscript></div></div><script>(function(){window._cf_chl_opt={cvId: '3',cZone: "publications.waset.org",cType: 'non-interactive',cRay: '9136db332da43e14',cH: 'BWrmHX8COBr4OLFi7Fb_PnNAF5JtHrzKVxWHEIvKzDc-1739806620-1.2.1.1-wz8.TFa1X0ZHD_Ry2fRzfKCbvjZN.yzbpjspY9y2MeJuMH18iJcdNiTXCn573FXQ',cUPMDTk: "\/abstracts\/search?q=odour%20delivery&__cf_chl_tk=vb7jFDbP5MNxVRgtd4C1YxI685zV.MiTu5sF1f2W04U-1739806620-1.0.1.1-Ye0xadqGZdeXUY2tK4KGjHn7TkWiuOTCQDV0zUzi3yo",cFPWv: 'b',cITimeS: '1739806620',cTTimeMs: '1000',cMTimeMs: '120000',cTplC: 0,cTplV: 5,cTplB: 'cf',cK: "",fa: "\/abstracts\/search?q=odour%20delivery&__cf_chl_f_tk=vb7jFDbP5MNxVRgtd4C1YxI685zV.MiTu5sF1f2W04U-1739806620-1.0.1.1-Ye0xadqGZdeXUY2tK4KGjHn7TkWiuOTCQDV0zUzi3yo",md: "i9H5EKCS8tOZjYkscytlD7fmac_ZthdiPKtR8gM1OkA-1739806620-1.2.1.1-0YYd6aBfwKlseDXe6oSxX8LgWYSkFufn0HOYqb56JoMG1gdtY8NQRFFT9MuYHZqTr9JIFLoGAJhCtP5UVFfHFscSlPYKjMuWkPt0j7vE84TCVx1l7LH0rsLfNWC4s4QZ5Vq1ddljBrdH4qcK_3l2InuqWl7BlwFM7uk8laVIlSV6U65IrLGjUdPjL_VSDwPuzBjTzF5M3VCxSIwmoIq.4rJ4QOldGQmxe7Hr6lNq6nNVvH5vXEkwR_ac6X8nbwyuMvipyBjHRWgAr_Rj9qY1KagGTEUKYqPL1hB3K9GMRI.6slbIDQ8EyW7mjv6l0kwNVp6nqcGfz6RySkUoYQcJwDMVzV9yIvzJRFWBh8S1ojz.hj4whVlsTYEf93PuWHQy.mHGTuiBUytRMvka7aECDChXrQ6xdC5qYAqmnDmvPVhmvZzxBp6l0SFbUB88f_BHYWIf5WA8F7ccqYg1EIndQHDeOB3Pn.T_NRtZbmKxLaLuAYyUcvt2DML57pOGSP_Nrcf6j5e0cQ7VA7_CVxCyuMPxuFJZZMjS7n9eWnEeqYe_yN5bPviyY4alk72XwNhxIJqloOvuStRenn4hCcXvKXErn52c4ap2dFJ3I79Fplfl5lyzadH2dVuT.6_ZeRy4zm3l4ie7n1m3aipudfCOijfyqVpXbJIwhf1zAulbiCSWH7XtA9dYdGfyzYMb3ghLUMwNk7UA6gYmtA3THBoxWk_hegvDD79sAryDfnneOjDUUtHlGaJFLsM.gRz613LCiMIjkHS3mGZwmSofljKOZcs8J8colyXXKLr0CO0_oeCTAUyZV9AVcST2VjA3uBkPYSeosM9B0BOBK.Y931.pax.Z6MONyjp8h24cf2O4F843l2e.9Kqb.4vB85HzGtxpllrZY2_RTFutfRgVqU6Pg_0u7mQbSB8dgVT4HhkieMsdaUr6FZePoDARaTtQXy_.rIOJ1MHXCyzwZYS4.J.ix8NR_SXWoI1m_V1syo5.xS.jTU8WWj3yOqXjtdpWl.ItyDqRjn11xwVJFGZz_YQmYkDXegf0blfNjQwayRZMjgfvKoDDJ12T9ITkDkm6TfIvG5lBcCePCkrmD9qxKOi.6QwKs5SFj6ljrc5PY1Xc28WGKYdlNeOCD3Swv_zzK5COlQ32iSLhILFpiqtkbGpWErRuaOVxF2TxrejaEME_c3Afd5Vm9_n3SAGL4lFeuAoWOvp7PXcGxIczxeJ9DGuO10gEQnj_v8F1N5DVvQjn01u1kqJOrsoMXhY3C.jqDZ35YqK0WuKHwPgaQlr7ItyMOss5uI2bPuhwwp_4st0AwPehLjLPEyZDHbwLvqkp8xzwxrXBhiZoSiFVqDr3gKqISCKd5c.YNfe0_rOU8Y_EcB6PVDpGQDPdD0mBZ0tEtmPuN7hikVzrwUoKivI2VAkgu3.ZGOii8oJiDskymyz_x2Lq4sx.WdtvjY2wVJC4CaSbnqvuLwNYP2cgO6o5MjPOjSqA_kZNo41gAqtovC_xOtWSiaqWPzZrCCgTPZD41roOnlbNoqiBgdjBFkyOxhpYTSfv2251ExKpY8bT0R0d1B.Eo1imMAYOPyTmGKtHApQBOCFuVGQajsW307C4xlXAf4S87d2bguACs7rVX8xLfx05dA3pAGBYlqLnMXtCirYH8x1VhWJJQe9SZbRpr5c4gJQIpckmJkyZFKN55174wRWXhBsK9OLc8VSAPA7TP4inR.EgbdEcHhk0lqftSmuypfCmc3IUQzw6OJDO13EWgpuToXOWPAjsZlZSmja5RXoafwQJVacthp6Y38s581RSfMBR7pWZqltF6CjE6wm1GJMRedIngEsgjnJSGs5ExIAnVVAZBMTPRX3drJMpxNZ_1ezRnhgi1KsK1eeMgCPKv8zqrAXeDeX_ZmIWqIP6hdRP.NMeeeM0kmEodkpUWC3AmZb6GE0JqJxVrHAsvSb02X4",mdrd: ".kFe7qmjZw7HRAFYnfK0PEqRV4dUwA39T48c78i0f2U-1739806620-1.2.1.1-ohar25xl1GQo1yWm3ND36e7dBeQRm2.Vg6NppvJeQUuO5ftNyBuFzN.vcCvvcUj7p08qc9wfbw4GZn6oGHF9sP.bkZagyKhSCVGmKCkYNzAzIMkeoI1YkHMOkN_nAsDJv58gWMaBBh6QOFc3WzXEXaDadMeisC2pWfb1PvgH6LCPu28wbm2Klj6eVFycPhgY6s.zMyFpuYyNwu0mCzX1Er7r_A1IdMEo4TwEEC5R3noJHHiU1NhloYncRLgFC2MUz8WcDWBWJpJHiswhLQFmWRkZCImETCLhDP1lT0s5w7eGbUxfSyU4fg6QYcp5eJTm2cnjYjptTl_4Co.LFpb2u3N.1ndauDJ_9N3WJT5jIDpXNNW_3EAT5NLuDc6LGLL887_SlwEL.LQA7UP_VCNKPT7qjXOMEe89yRfaMMlj3rzhJo.vYte1QPq9c8wisG_sLyNwRGA51vqIctPAbk86AmkhKlhtt7j7IJhSELpRPmZzmt7UEinIbJUmOZ64ivRjpkmtKIfpwHODjS6Z_BMTspRcxAyFEtxPYrAu9rfMba5tH_m7pcsA60KbfeohpSAK8Div3f0s1jNTSYris.5TneTtZ87Tx5Sdf4XD08wANQq0NJU3cYo3AVrOilOA49MFx.8KJ3HepTaIKzIlKZ2nUR0J88_3Rg1ax9UYMDWcIS7X5eY1W9yFZupVzMYx99u3exXoVMklJrZaXCUExPPVpU6zw.HEqXI9hOdRFxwYMieHs8jz8hFwzVmvA9MrxmhX8UZpa7gRI_grCzlhukv9BZ_Jjl5t34vGPAh4OrOxgBDQAZxvPOfl6SuHFQUhJFhX1b_C3YydAzeYqqDNm4IxeQ1y3EMkk2b5RFpj40oxDDB17aXICbF3Q.WpviwbwPtk5ucc_LeqH032HBLYwhF94owf4agB.8aSdqWONGUZAE07K2jMm1HA4bhA4Yhj.JnlhGyWTFMigVGm3ZG3MraVUT.B.oYwZLjOX1IfBUciPuxKSNOOcv.I4nSDHNuGfwj8TqNLx6m_q1d2wQVthPyAFHhMXEK43gPUjOVUUOVGWJmvC4pMkc_29WJLplBonjTTK0Bl4Einp4TwQPGV8wPJn7HQZTJmOmsKCJAvwjYanB2yZVNhor2N52ycU3qJxkK4eXBrwaZyN.hXBLqDrqIDWWeBQ0vhQ_FXuAsWO8HqztYZ5cgfzbmdlYEMsxxQ2u7QHEnr6caREpSxQblSgpTp8BjTgZoOpyGBmRIOJ0lFKZIGNttZV.MO2TG7xWIu.5LIw4oVqoaDnR1_8CJ9_BPL9clwvBbTab9VbDnhgINbMyL.6DLs1jsN86LjcR9uhlo2OY1YVE68gkf16BMqIK0.0wpHonlfzMnrz.MldLO6LMLkslrVtoepHGmBevpYDAR8pAOSW9xBexh18cSf3s6K8aN.xqZHtpZxtZfUYPJ2.kpzwwfI4MJ2cTjMGSq299Gn4MFlDRcBE4jK2sjJkgpGZogas4jU1IzGY6nlzMWcba1qDBX5MzWItBcXFOKA053N2MiWU4nGi_XufD7uZxVcqfhBv5VrsIP8d5yHVOANzSq0jFsFa0UU4fDrbQ38KQs9cstv0yDLDkcMuzfTd4hHbVN4.zoSvg9MbPAqQtugbj90JhhRXTMsVGEbRbjMIs1giSEVoVsko2Kwj9FOWf3g0s5hDIagwGMs1ZYNkpsyyLxKxtoKFskP6nYBi9kXDBGlAl3qEIvZ8u_nS_eqMJvEtLKC1ixrm_B.RwiudkWd9m_aPxT9uTsa2sID3Js1BQA7EofjygZx2kfMboXsTVyjWestJGaOXRmbNAiOf1yBJlqNoycpoiwzEbLY35KCkRWVM1qPY4xdG_UhpKVaSRb2vTbO2kzic5P_AfZ5DDzhBmrqFd7529TXPMCDqaUyTLCJ9wCXnsXfgwVFoj_aAYVAFswDWMXM1BvvlwFLISNmFIha5aicGasOdBDTLEn2MWoe"};var cpo = document.createElement('script');cpo.src = '/cdn-cgi/challenge-platform/h/b/orchestrate/chl_page/v1?ray=9136db332da43e14';window._cf_chl_opt.cOgUHash = location.hash === '' && location.href.indexOf('#') !== -1 ? '#' : location.hash;window._cf_chl_opt.cOgUQuery = location.search === '' && location.href.slice(0, location.href.length - window._cf_chl_opt.cOgUHash.length).indexOf('?') !== -1 ? '?' : location.search;if (window.history && window.history.replaceState) {var ogU = location.pathname + window._cf_chl_opt.cOgUQuery + window._cf_chl_opt.cOgUHash;history.replaceState(null, null, "\/abstracts\/search?q=odour%20delivery&__cf_chl_rt_tk=vb7jFDbP5MNxVRgtd4C1YxI685zV.MiTu5sF1f2W04U-1739806620-1.0.1.1-Ye0xadqGZdeXUY2tK4KGjHn7TkWiuOTCQDV0zUzi3yo" + window._cf_chl_opt.cOgUHash);cpo.onload = function() {history.replaceState(null, null, ogU);}}document.getElementsByTagName('head')[0].appendChild(cpo);}());</script></body></html>