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Kinetic studies on the loss of water from α- d-glucose monohydrate
Although the dehydration of α- d-glucose monohydrate is an important aspect of several industrial processes, there is uncertainty with regard to the applicable rate law and other factors that affect dehydration. Therefore, the dehydration of three glucose monohydrate samples has been studied using i...
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| Published in: | Carbohydrate research 2011-10, Vol.346 (14), p.2285-2289 |
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| Main Authors: | , |
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| Language: | English |
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| cites | cdi_FETCH-LOGICAL-c334t-29db7002a27407131e3b1927173c757a71c525510c633989a38239c6bb0ea1413 |
| container_end_page | 2289 |
| container_issue | 14 |
| container_start_page | 2285 |
| container_title | Carbohydrate research |
| container_volume | 346 |
| creator | Ponschke, Michelle A. House, James E. |
| description | Although the dehydration of α-
d-glucose monohydrate is an important aspect of several industrial processes, there is uncertainty with regard to the applicable rate law and other factors that affect dehydration. Therefore, the dehydration of three glucose monohydrate samples has been studied using isothermal gravimetric analysis. Dehydration follows a one-dimensional contraction (R1) rate law for the majority of kinetic runs, and an activation energy of 65.0
±
3.9
kJ
mol
−1 results when the rate constants are fitted to the Arrhenius equation. Fitting the rate constants to the Eyring equation results in values of 62.1
±
3.7
kJ
mol
−1 and −77.8
±
4.7
J
mol
−1
K
−1 for Δ
H
‡ and Δ
S
‡, respectively. The impedance effect on the loss of water vapor has also been investigated to determine the values for activation energy, enthalpy, and entropy for diffusion of water. The results obtained for the activation parameters are interpreted in terms of the absolute entropies of anhydrous glucose and the monohydrate. |
| doi_str_mv | 10.1016/j.carres.2011.07.012 |
| format | article |
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d-glucose monohydrate is an important aspect of several industrial processes, there is uncertainty with regard to the applicable rate law and other factors that affect dehydration. Therefore, the dehydration of three glucose monohydrate samples has been studied using isothermal gravimetric analysis. Dehydration follows a one-dimensional contraction (R1) rate law for the majority of kinetic runs, and an activation energy of 65.0
±
3.9
kJ
mol
−1 results when the rate constants are fitted to the Arrhenius equation. Fitting the rate constants to the Eyring equation results in values of 62.1
±
3.7
kJ
mol
−1 and −77.8
±
4.7
J
mol
−1
K
−1 for Δ
H
‡ and Δ
S
‡, respectively. The impedance effect on the loss of water vapor has also been investigated to determine the values for activation energy, enthalpy, and entropy for diffusion of water. The results obtained for the activation parameters are interpreted in terms of the absolute entropies of anhydrous glucose and the monohydrate.</description><identifier>ISSN: 0008-6215</identifier><identifier>EISSN: 1873-426X</identifier><identifier>DOI: 10.1016/j.carres.2011.07.012</identifier><identifier>PMID: 21831365</identifier><language>eng</language><publisher>Netherlands: Elsevier Ltd</publisher><subject>activation energy ; Dehydration ; Dextrose ; Diffusion ; enthalpy ; entropy ; equations ; glucose ; Glucose - chemistry ; impedance ; Kinetics ; uncertainty ; Water - chemistry ; water vapor ; α- d-Glucose monohydrate</subject><ispartof>Carbohydrate research, 2011-10, Vol.346 (14), p.2285-2289</ispartof><rights>2011 Elsevier Ltd</rights><rights>Copyright © 2011 Elsevier Ltd. All rights reserved.</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><cites>FETCH-LOGICAL-c334t-29db7002a27407131e3b1927173c757a71c525510c633989a38239c6bb0ea1413</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><link.rule.ids>314,776,780,27903,27904</link.rule.ids><backlink>$$Uhttps://www.ncbi.nlm.nih.gov/pubmed/21831365$$D View this record in MEDLINE/PubMed$$Hfree_for_read</backlink></links><search><creatorcontrib>Ponschke, Michelle A.</creatorcontrib><creatorcontrib>House, James E.</creatorcontrib><title>Kinetic studies on the loss of water from α- d-glucose monohydrate</title><title>Carbohydrate research</title><addtitle>Carbohydr Res</addtitle><description>Although the dehydration of α-
d-glucose monohydrate is an important aspect of several industrial processes, there is uncertainty with regard to the applicable rate law and other factors that affect dehydration. Therefore, the dehydration of three glucose monohydrate samples has been studied using isothermal gravimetric analysis. Dehydration follows a one-dimensional contraction (R1) rate law for the majority of kinetic runs, and an activation energy of 65.0
±
3.9
kJ
mol
−1 results when the rate constants are fitted to the Arrhenius equation. Fitting the rate constants to the Eyring equation results in values of 62.1
±
3.7
kJ
mol
−1 and −77.8
±
4.7
J
mol
−1
K
−1 for Δ
H
‡ and Δ
S
‡, respectively. The impedance effect on the loss of water vapor has also been investigated to determine the values for activation energy, enthalpy, and entropy for diffusion of water. The results obtained for the activation parameters are interpreted in terms of the absolute entropies of anhydrous glucose and the monohydrate.</description><subject>activation energy</subject><subject>Dehydration</subject><subject>Dextrose</subject><subject>Diffusion</subject><subject>enthalpy</subject><subject>entropy</subject><subject>equations</subject><subject>glucose</subject><subject>Glucose - chemistry</subject><subject>impedance</subject><subject>Kinetics</subject><subject>uncertainty</subject><subject>Water - chemistry</subject><subject>water vapor</subject><subject>α- d-Glucose monohydrate</subject><issn>0008-6215</issn><issn>1873-426X</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2011</creationdate><recordtype>article</recordtype><recordid>eNp9kEFu1TAQhi1ERV8LN0CQHauEGTu2kw0SeiotohILqMTOcpxJ66ckLnYC6rF6Ec5UVyksWdnWfP_M-GPsNUKFgOr9oXI2RkoVB8QKdAXIn7EdNlqUNVc_nrMdADSl4iiP2UlKh_wEpdULdsyxESiU3LH9Fz_T4l2RlrX3lIowF8sNFWNI-T4Uv-1CsRhimIo_92XRl9fj6kKiYgpzuLnrY66_ZEeDHRO9ejpP2dWns-_7i_Ly6_nn_cfL0glRLyVv-04DcMt1DRoFkuiw5Rq1cFpqq9FJLiWCU0K0TWtFw0XrVNcBWaxRnLJ3W9_bGH6ulBYz-eRoHO1MYU2madq61rKVmaw30sX8j0iDuY1-svHOIJhHe-ZgNnvm0Z4BbbK9HHvzNGDtJur_hf7qysDbDRhsMPY6-mSuvuUOKptFCQiZ-LARlEX88hRNcp5mR72P5BbTB___HR4A4juJqQ</recordid><startdate>20111018</startdate><enddate>20111018</enddate><creator>Ponschke, Michelle A.</creator><creator>House, James E.</creator><general>Elsevier Ltd</general><scope>FBQ</scope><scope>CGR</scope><scope>CUY</scope><scope>CVF</scope><scope>ECM</scope><scope>EIF</scope><scope>NPM</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>7X8</scope></search><sort><creationdate>20111018</creationdate><title>Kinetic studies on the loss of water from α- d-glucose monohydrate</title><author>Ponschke, Michelle A. ; House, James E.</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c334t-29db7002a27407131e3b1927173c757a71c525510c633989a38239c6bb0ea1413</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2011</creationdate><topic>activation energy</topic><topic>Dehydration</topic><topic>Dextrose</topic><topic>Diffusion</topic><topic>enthalpy</topic><topic>entropy</topic><topic>equations</topic><topic>glucose</topic><topic>Glucose - chemistry</topic><topic>impedance</topic><topic>Kinetics</topic><topic>uncertainty</topic><topic>Water - chemistry</topic><topic>water vapor</topic><topic>α- d-Glucose monohydrate</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Ponschke, Michelle A.</creatorcontrib><creatorcontrib>House, James E.</creatorcontrib><collection>AGRIS</collection><collection>Medline</collection><collection>MEDLINE</collection><collection>MEDLINE (Ovid)</collection><collection>MEDLINE</collection><collection>MEDLINE</collection><collection>PubMed</collection><collection>CrossRef</collection><collection>MEDLINE - Academic</collection><jtitle>Carbohydrate research</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Ponschke, Michelle A.</au><au>House, James E.</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Kinetic studies on the loss of water from α- d-glucose monohydrate</atitle><jtitle>Carbohydrate research</jtitle><addtitle>Carbohydr Res</addtitle><date>2011-10-18</date><risdate>2011</risdate><volume>346</volume><issue>14</issue><spage>2285</spage><epage>2289</epage><pages>2285-2289</pages><issn>0008-6215</issn><eissn>1873-426X</eissn><abstract>Although the dehydration of α-
d-glucose monohydrate is an important aspect of several industrial processes, there is uncertainty with regard to the applicable rate law and other factors that affect dehydration. Therefore, the dehydration of three glucose monohydrate samples has been studied using isothermal gravimetric analysis. Dehydration follows a one-dimensional contraction (R1) rate law for the majority of kinetic runs, and an activation energy of 65.0
±
3.9
kJ
mol
−1 results when the rate constants are fitted to the Arrhenius equation. Fitting the rate constants to the Eyring equation results in values of 62.1
±
3.7
kJ
mol
−1 and −77.8
±
4.7
J
mol
−1
K
−1 for Δ
H
‡ and Δ
S
‡, respectively. The impedance effect on the loss of water vapor has also been investigated to determine the values for activation energy, enthalpy, and entropy for diffusion of water. The results obtained for the activation parameters are interpreted in terms of the absolute entropies of anhydrous glucose and the monohydrate.</abstract><cop>Netherlands</cop><pub>Elsevier Ltd</pub><pmid>21831365</pmid><doi>10.1016/j.carres.2011.07.012</doi><tpages>5</tpages></addata></record> |
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| ispartof | Carbohydrate research, 2011-10, Vol.346 (14), p.2285-2289 |
| issn | 0008-6215 1873-426X |
| language | eng |
| recordid | cdi_proquest_miscellaneous_889447595 |
| source | ScienceDirect Freedom Collection 2022-2024 |
| subjects | activation energy Dehydration Dextrose Diffusion enthalpy entropy equations glucose Glucose - chemistry impedance Kinetics uncertainty Water - chemistry water vapor α- d-Glucose monohydrate |
| title | Kinetic studies on the loss of water from α- d-glucose monohydrate |
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