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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
1

Funkcionalne karakteristike smeša maltodekstrina i namenske masti kao komponenti niskoenergetskih masnih punjenja za konditorske proizvode / Functional characteristics of vegetablefat/maltodextrin gel blends as a component for low calorie confectionery fat fillings

Hadnađev Miroslav 19 April 2012 (has links)
<p>Masna punjenja predstavljaju grupu proizvoda koje se<br />koriste u konditorskoj i pekarskoj industriji. Kako ona<br />najče&scaron;će sadrže između 30-40% masti, teži se dobijanju<br />formulacija sa redukovanim sadržajem masti. To se<br />može postići zamenom dela masne faze uz upotrebu<br />zamenjivača masti, najče&scaron;će hidrokoloida koji imaju<br />osobine slične osobinama zamenjene masti.<br />Maltodekstrini i njihovi geli mogu se koristiti kao<br />zamenjivači masti. Oni predstavljaju produkte hidrolize<br />skroba koji su rastvorljivi u vodi, mogu da poseduju<br />osobine formiranja gela, imaju slične mazive osobine<br />kao i masti i blagi i neutralni ukus.<br />U ovom radu ispitivane su reolo&scaron;ke osobine različitih<br />maltodekstrina kao i sme&scaron;a namenske biljne masti i<br />rastovora/gela maltodekstrina u odnosu 9:1. Na<br />osnovu dobijenih rezultata utvrđeno je da su od svih<br />ispitivanih komercijalnih maltodekstrina,<br />maltodekstrini <em>01970 </em>i <em>N-Lite D</em> sa namenskom biljnom<br />masti davali stabilne sisteme. Stoga su maltodekstrini<br /><em>01970</em> i <em>N-Lite D</em> kori&scaron;ćeni za dalja istraživanja.<br />Namenska biljna mast zamenjivana je sa 15 i 20%<br />gelima maltodekstrina <em>01970</em> i <em>N-lite D</em> u tri različita<br />odnosa: 16,7% gela maltodekstrina i 83,3% namenske<br />biljne masti; 33,3% gela maltodekstrina i 66,7%<br />namenske biljne masti i 50% gela maltodekstrina i<br />50% namenske biljne masti. Određivane su reolo&scaron;ke<br />osobine metodom histerezisnog postupka,<br />viskoelastične osobine, kao i teksturne osobine<br />pripremanih sme&scaron;a. Dobijeni rezultati su ukazivali da<br />prisustvo maltodekstrinskih gela u sme&scaron;i sa<br />namenskom biljnom masti utiče na pad tiksotropnosti i<br />čvrstoće i povećanje prividnog viskoziteta i<br />viskoelastičnosti ispitivanih sistema. Sve sme&scaron;e<br />namenske biljne masti i gela maltodekstrina služile su<br />kao komponenta masne faze za pripremu masnih<br />punjenja sa smanjenim sadržajem masti. Povećanjem</p><p>zamene dela masne faze maltodekstrinskim gelima u<br />masnim punjenjima uzrokovalo je povećanje<br />tiksotropnosti i čvrstoće kao i promenu boje krajnjeg<br />proizvoda. Na osnovu senzorske ocene sprovedene od<br />strane iskusnog senzorskog panela i na osnovu testa<br />prihvatljivosti od strane netreniranih potro&scaron;ača,<br />najbolje ocenjena masna punjenja bila su ona kod kojih<br />je 5% masti zamenjeno maltodekstrinskim gelima.<br />Međutim, na osnovu rezultata testa prihvatljivosti<br />uočeno je da su i sistemi sa 15% zamene masti bili<br />senzorski prihvatljivi. Takođe je i na osnovu rezultata<br />sprovedenog upitnika na uzorku od 250 ispitanika<br />utvrđeno da su potro&scaron;ači (64,4%) zainteresovani za<br />konzumiranje konditorskih proizvoda sa smanjenim<br />sadržajem masti.</p> / <p>Confectionery fat fillings are products used in<br />confectionery and baking industry. They contain<br />approximately 30-40% of fat. Due to the high fat<br />content, fat fillings have considerable high caloric<br />value. Therefore, there is a trend to decrease fat<br />content in fat filling formulation. That can be achieved<br />by replacing the portion of the fat phase with fat<br />replacers, most often with hydrocolloids having<br />characteristics which tend to mimic properties of<br />replaced fat. Maltodextrins and their gels can be used<br />as potential fat replacers. Maltodextrins represent<br />starch hydrolysis products soluble in water. Also they<br />posses gel forming ability, spreading ability similar to<br />fats, and bland and non sweet taste.<br />Rheological properties of different types of<br />maltodextrins were examined. Also, blends prepared<br />with 90 % of vegetable fat and 10% of maltodextrin<br />solution/gels were rheologically characterised.<br />According to obtained results, it was found that among<br />all tested commercial maltodextrins,<em> 01970</em> and <em>N-Lite<br />D</em> built stable systems. Therefore, they were used in<br />further measurements.<br />Vegetable fat was partially replaced by 15 and 20% of<br /><em>01970</em> and <em>N-Lite D</em> maltodextrin gels in three different<br />ratios (16.66%, 33.33% and 50% respectively). Steady<br />shear, dynamic oscillatory measurements as well as<br />textural measurements were performed. The obtained<br />results indicated that the presence of maltodextrin gels<br />in blends with vegetable fat influenced the decrease of<br />thixotropy and hardness and increase of viscosity and<br />viscoelasticity of the tested systems. All maltodextrin<br />gel/vegetable fat blends were further used for</p><p>preparation of confectionery fat fillings. The increase in<br />the amount of fat reduction resulted in the increase of<br />thixotropy and hardness and change in colour of the<br />final product. According to sensory analysis performed<br />by trained sensory panel as well as by measurement of<br />product acceptance&ndash;preference performed by<br />untrained panellists (consumers), fat filling with 5% fat<br />reduction had the highest scores. However, according<br />to product acceptance&ndash;preference measurements it<br />was estimated that the final product with 15% fat<br />reduction was also sensory acceptable. The results of<br />survey performed on 250 participants showed that<br />consumers (64.4%) were interested in consuming low<br />fat confectionery product</p>

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