Thixotropic Behavior of Honey from Eucalyptus SPP

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F62156489%3A43210%2F17%3A43909795" target="_blank" >RIV/62156489:43210/17:43909795 - isvavai.cz</a>

Výsledek na webu

<a href="http://dx.doi.org/10.1111/jfpp.13094" target="_blank" >http://dx.doi.org/10.1111/jfpp.13094</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1111/jfpp.13094" target="_blank" >10.1111/jfpp.13094</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Thixotropic Behavior of Honey from Eucalyptus SPP

Popis výsledku v původním jazyce

Honey is a solution with high viscosity and most types of honey exhibit Newtonian behavior. However, some types show non-Newtonian features (thixotropy or dilatancy), which exerts influence on processing of the honey. The aim of this study was to evaluate the rheological properties of honey from Eucalyptus spp. The investigated samples of eucalypt honey originating from Italy or Australia were analyzed by the following methods: melissopalynological analysis, color on the Pfund scale, optical activity, water content and electrolytic conductivity. Rheological tests were carried out on a highly accurate device. The dependence of apparent viscosity on temperature and time was measured, and hysteresis loop tests were run. The dependence of shear rate on shear stress was described in accordance with the Herschel-Bulkley mathematical model. The rheological tests revealed the following: all samples exhibited non-Newtonian behavior and all were determined as thixotropic fluids. These results are discussed in relation to previous findings on the dilatant behavior of eucalypt honey. Practical Applications: Knowledge of rheological properties of foodstuff is important for handling, processing and storing. The description of flow properties can indirectly offer information about the structure of the tested liquid. Most honeys behave as Newtonian fluids. However, there are exceptions such as heather or manuka honey. Eucalypt honey is also among these exceptions. Studies dealing with rheological properties of eucalypt honey are more than 60-years old. This study focused on rheological behavior of this type of honey and revised current knowledge.

Název v anglickém jazyce

Thixotropic Behavior of Honey from Eucalyptus SPP

Popis výsledku anglicky

Honey is a solution with high viscosity and most types of honey exhibit Newtonian behavior. However, some types show non-Newtonian features (thixotropy or dilatancy), which exerts influence on processing of the honey. The aim of this study was to evaluate the rheological properties of honey from Eucalyptus spp. The investigated samples of eucalypt honey originating from Italy or Australia were analyzed by the following methods: melissopalynological analysis, color on the Pfund scale, optical activity, water content and electrolytic conductivity. Rheological tests were carried out on a highly accurate device. The dependence of apparent viscosity on temperature and time was measured, and hysteresis loop tests were run. The dependence of shear rate on shear stress was described in accordance with the Herschel-Bulkley mathematical model. The rheological tests revealed the following: all samples exhibited non-Newtonian behavior and all were determined as thixotropic fluids. These results are discussed in relation to previous findings on the dilatant behavior of eucalypt honey. Practical Applications: Knowledge of rheological properties of foodstuff is important for handling, processing and storing. The description of flow properties can indirectly offer information about the structure of the tested liquid. Most honeys behave as Newtonian fluids. However, there are exceptions such as heather or manuka honey. Eucalypt honey is also among these exceptions. Studies dealing with rheological properties of eucalypt honey are more than 60-years old. This study focused on rheological behavior of this type of honey and revised current knowledge.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

21101 - Food and beverages

Projekt

—

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2017

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Journal of Food Processing and Preservation

ISSN

0145-8892

e-ISSN

—

Svazek periodika

41

Číslo periodika v rámci svazku

4

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

11

Strana od-do

—

Kód UT WoS článku

000407319100093

EID výsledku v databázi Scopus

2-s2.0-84987740625