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: '91357fcf9d2c406d',cH: 'pL4F8aJIhebZco9HEBdk.ZP0fEBMzAVgXHhdOKvd0Ac-1739792391-1.2.1.1-dX.u1BNZF63niNukvw.hH4dAOOIba_9sdNzy02d5vXDbN6FmD591DPaAWlTjS4hK',cUPMDTk: "\/abstracts\/search?q=natural%20preservative&__cf_chl_tk=AY.zNvW.VOhMotJwzY3xpiLnbfutfdfBe6ZE4AwHXKI-1739792391-1.0.1.1-BrtzVY9TN8_Veqo8soEP8AcitrAZiKsHMI3fetG98fA",cFPWv: 'b',cITimeS: '1739792391',cTTimeMs: '1000',cMTimeMs: '120000',cTplC: 0,cTplV: 5,cTplB: 'cf',cK: "",fa: "\/abstracts\/search?q=natural%20preservative&__cf_chl_f_tk=AY.zNvW.VOhMotJwzY3xpiLnbfutfdfBe6ZE4AwHXKI-1739792391-1.0.1.1-BrtzVY9TN8_Veqo8soEP8AcitrAZiKsHMI3fetG98fA",md: "ZQ6nMPM79xME.QYJUMA.uQL_pFNUrdqWVpErujMZDO4-1739792391-1.2.1.1-Nbq9_1aIS13RaroVJRgKZa3GVSD5Duhv_tYH5_M4m7eLMWndPrndgj8vqYqXDw54I.Mo4sOSwIEmLcUbYaUhPQq82fXZvgwpNyjJG7HSBpUtZBwwQGb_gdxW1SIaIZO2c4aBlfNrs.AjrCvqb3PYWBzUMz2Ht5tY_KbkOCj22hgY37gxfVRXj0ZQ6zxnzEIA8fTlJ9hZ5sD2N.rc9wJ1JhNxuDMouSXRuSxjckkSZNn8VPOJWoNUPmqKJjwJF1bDL0lHArb0qm6RXe_vQotgzkAVKHvbunxr6g5obdDGcfQx6kA24eK2NmeJU.6GhS_wumYP88_nTK90t74qXoP_7y0x23Midk7BHb.9J_aiwV8l8UdpJciNoN5w_7mZLpWYMnyyemLofCEWqhsXgvPlFoc48pryyWvZoC_eEo6qTnV9aj3aMA2O6dE0asuXnL_PBlyi9gsPCy.pqoLMn0fCbNyDP7X0INwA_gddtcIh4Gi0M3T9tQV3dmFozk5aMRSu4NsvMERViYx7FPoZn5RBc8dZAtneI5G60g1QMpf6KSR4N_nYicYFD8oCcMmkwGCh8GwXKjKUM1aIjALLV_FhwC_JmLBNZ3zSEPrHLv8X4MhmeA5WEPgRrIqJmTJlFcgzTOyk0ZljMDczzhBZAogN.fYVzk5Zuw3dj79rS3vrf41UQ06.qz8jnnoSmOQ_wM0WQNumGDLQRsNxJwoRni5iGyjQ_JD4HxwedGjZ2I6H2CDHm5X_Sf5kUetVKeYWpqI2er97V67_JEdzcSCZMvfhickG1GHCQjhPyO_2zSC5NIA0bkVPZqhYbyRwM.KMFjsEiiBFtF1MMfbXoDJ6a8lwAkHNThEFFN.OEnA5ztbXtaVN0cvGwIhwwwb2sNfDjJ9wTUD1cq0K4Eir_Khk.2XLkdxRAjO1voINIJVNf18UTzHXr1SYUdCKt_pIQiPC0PWoJ5y1KRg0Oq4BqaWGrATWpUpwQOWq6WFdOTxijQzrPTnqTLCuj1emK2mFRwHn5lSVG.iwAyhAerx66xPIFUSCwcMUVWbPNVvJD83x6dwxIiBEJPX0RyUdrd4CfT6LgCbYyQM3pm9SxBmEZnS9wKN9sjW6yEqYmlAf1F77A3OYwoVU06RvtJcQfQB67hRhVtPho2JNuYs.GrlF.P1bRG2W41_B_46i.iy.HFKHlLDEiQ.NSuUgiRdzDOtw5S49N6rS0CHByEAEzM60RWR.8IbgPpC_MTZK4UcDMCEaYLCMzgBimPPi3hN3hk2MLsAn91z3zhfZQvSVSJV2P0qG2OjGHU_U6Hg4EFb559NaUDm4gu.EUwzDgqDRiQA0mrueyrCoMz40x9siEwe_zkxq5Bo8P8hFk5LNv9.xyw_Q29kf7Ayz5m48tKvGfajvP1M3WPUWbDpJBOywTFHMYAWoKiLpuuW7_pVVni.wWt86Mo2r1hqCQ3.TTxPY6EoPCcJZzrsHbLggMq4Y765msZubbYQtyqOtCuJD4N1_oRyRAp1PU8b1_lsoePOnPx4g8PCOS1islidl0TF7kfzXJlp0MDDw8AC1cB2NBGPHtCIqpMCx3AeKMIb8Ko4A99QuiooiobaUCTj_smT1WaQ...t188BJf7rmezSMdIyLxOzUyS.uHAj18tvB2VSAmFNZGte1jrERaR.ZG30q1XPqZ5D6AgOv4udtZo75TMKluDFEbzl4O9M7lvetq8LHfHwc1jJRbWIBPi3nEO73pnbryYKcGMKs1q20S5ybFeiAzNhzqFQxyfvpQK4TzOCvwsMmORGe_ZyaeU0Wgq5m22FgT3WNT8lDcXDsrMOj0KPJb1NdNIgv_b9mQSjR3F82SOVRIhR6O_dGRBtkg_tWuOFegS_qBBAynTBSZTz7vgvYhOnUV08CrLUA8WTCcvoDd_Tw_GygsMp.XfGME5R_ccx22DEvHjN2lF4nBcRfJ.k07hVoPZC81ZdMvOIPD7w13ThqPb_piUqp",mdrd: "mIFyGy52mNhFD5txQzAxiL2HyDdLI_gXC1YcK5fyoHA-1739792391-1.2.1.1-EfKoj7XSXMMj5OkO3WSU5g.Syfunjl6gUjZISx5Odp53w8jrcdYiCGMhHxlwPSiEi1J_xq.leEgRUyyLW3awnL_x4WAiS45AtwktPMy.hLycibnZ1VF8Mcvszostp8zx63tAzMyVInQrSzDovdhfccXekZVXqcoeQknd80lHvTl6xyP6.z6JvWusPivplZZupf_vTfD_9SN5NPPkObCth8R6iwoGJ__94YuNDCByWetdjRnNSumwHo9b4vXR6bWSXOUeQhnRStwcn3sn_oGnE9E1INnjejziFA8QZ8tdXKjaTwKYYVRKc4GBmQXortHlJKRHjKBQAjdgplcdOMkY_tvsIAPVKbc8Up6MHyMJkYO_64CYkkewHlxUR4cfhoGNpbqbdGF2AvPtOpoPBimipS_7u6GkAGfixiwKPmSr4qoseFVZ7U5y94nnWi7uvAqirxfyf1JxBckfGrDPVHolf8JSYsonEqe.yZERfBMzI3M2s50biHs4o5UofjPAlb9JzR4XsXr7EdXuG77XG45WO5nPQm05ADCZSdqHL02eeqOS4S3QvPskZdJF0e1919i39TnCy75c1rYVGVU5xYxN0DXAXccnJ1foGUUg86RWyjgI8TzBmwX89VnFQDDSwft9IOxIzEjHqltBnQ6z1mVEK9hdR_ONS9bWr7bjt7ooTx.A2bNGrw3U_Pwu84NNHy06QfuEMAHNI7vDJHmuHaXlHidYPNDpabldUSK6Y2qBhrWOczg10MV2oJ9x18FEfpWDWTofbuPdPe3YbJheGEjOw62yiZNeHIAzg0PimNLsJ.pEij2Low0tfBtZ9jWE4_O7VGsMcGw9trnD_WrIoQLnFipBr6sR4fVf2vL0bhcW7UBpJrI5Y1.IcDtUvJbg58AUOlQJJnUiK7vwOmzaWnEZ74BntwVH6z_v_iKxYRgZvuW089nDbpWNP6ENz4k1nFHZX007di1O5BPxBBmlGsXXta1Zw.QIktZygCxP3fqdALK0mN7RtPknCmvnMXx0tDNl3WWT8CPbQCDFzAreQ.YCklS7Y6JFq6QvXAu_6skZbYp0hnbQog_XJPpbuRYmPx5wtCF0BVvftCdxdbcw4hXLyicdzhoucMeWyOG9CoTFs_BOAnOBpP4HUxjmKzn64G7ecZN9LGhV8OEs2.J6PbiFRown4JyGBuTptyMARBotGEjNLBX7Wzr42nYpBWQvtR9Ob08mFGAbE2yw3BIVK4BDz9DrnEU0rthXKsxnvNgd67lwapI02va7KnbBeLf5Bk7YTUaK6lJ32ytTLyfHMRZGQwDbBPbD5HkjUAlx8mv_8phx7cLf61DcRGDeIylRWyjRViI7LzEPnNBrUua2rBTTGfFOFVZ9_545pKUOxU6NAmon.zzaLDAvdEZb9wq7HIuUaQldwRoK3jdZnQTJq3ISVhx0B_4b5KzreRRab9sGxAG9ylMaBPk1UdC50PnM0RZ1bCas0yoxSWTn5TujEqxL5_jFafSOwOwrKAsoNiJ4M6RZDLb3ZMqpmi24OP8PxFAtAGo5aSG93uH6_DsotOAR0XiRF6dWaHJF7wT49hJDbsKFOm6RnQxaHsrI4Ux6aH4Km_3cNj.ZyfW3GGqXZ_1CbrUVQprxXGNMnivZFBJTbRKbMjOUhU7tu9bp9sOohGX32jNjdRKVFohMbZomAggZar3Q6qVMUxthc5U.FJdiBr9v60lLab2dntiN0P01EPrq797RmjbaoXT5qRIJqTID288.sk.VE9Ae7JbQdduGyP1DnrhHi4j3GznSTJUkm.dccKcBLsKaA_UlyYfikyWEDpZL.pRlQIr9t5kwfc55sirNDh9ORHij7t4UiiWBWlJ2Lh1xmzOtA75ptN9n2h8rij8ZMJ3rQLgHHKnFGm7s9fGfgcM0Q1kzd74Nj_dYOWsnvqcU49jFEPOr1TEqaqcrf9DGVygSk32DhayQuIcAvQlYWKSn7e6E_DsPrX6ER5V7sUo0uBeVmbzrw99pRpVZsA"};var cpo = document.createElement('script');cpo.src = '/cdn-cgi/challenge-platform/h/b/orchestrate/chl_page/v1?ray=91357fcf9d2c406d';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=natural%20preservative&__cf_chl_rt_tk=AY.zNvW.VOhMotJwzY3xpiLnbfutfdfBe6ZE4AwHXKI-1739792391-1.0.1.1-BrtzVY9TN8_Veqo8soEP8AcitrAZiKsHMI3fetG98fA" + window._cf_chl_opt.cOgUHash);cpo.onload = function() {history.replaceState(null, null, ogU);}}document.getElementsByTagName('head')[0].appendChild(cpo);}());</script></body></html>