The effects of gamma rays upon monohydrated and anhydrous asparagine: a DSC study in sealed pans
Non-irradiated and gamma irradiated monohydrated ( l Asn·H 2 O) and anhydrous ( l Asn) asparagines, in solid state, were studied by means of DSC. The samples were irradiated at room temperature with gamma radiations using a 137 Cs source. The exposure doses ranged between 1 and 10 kGy. All samples w...
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| Veröffentlicht in: | Journal of radioanalytical and nuclear chemistry 2013, Vol.295 (1), p.379-384 |
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| container_title | Journal of radioanalytical and nuclear chemistry |
| container_volume | 295 |
| creator | Contineanu, M. Neacsu, Ana Contineanu, Iulia Perisanu, Stefan |
| description | Non-irradiated and gamma irradiated monohydrated (
l
Asn·H
2
O) and anhydrous (
l
Asn) asparagines, in solid state, were studied by means of DSC. The samples were irradiated at room temperature with gamma radiations using a
137
Cs source. The exposure doses ranged between 1 and 10 kGy. All samples were scanned in sealed pans, from room temperature to a temperature beyond the melting point. The DSC scans of
l
Asn·H
2
O samples in sealed crucibles revealed the presence of two dehydration processes and one of decomposition and only decomposition in the case of
l
Asn. The influence of gamma irradiation consisted in decreasing the enthalpy of dehydration and of decomposition. A decomposition mechanism is proposed. |
| doi_str_mv | 10.1007/s10967-012-2157-4 |
| format | Article |
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l
Asn·H
2
O) and anhydrous (
l
Asn) asparagines, in solid state, were studied by means of DSC. The samples were irradiated at room temperature with gamma radiations using a
137
Cs source. The exposure doses ranged between 1 and 10 kGy. All samples were scanned in sealed pans, from room temperature to a temperature beyond the melting point. The DSC scans of
l
Asn·H
2
O samples in sealed crucibles revealed the presence of two dehydration processes and one of decomposition and only decomposition in the case of
l
Asn. The influence of gamma irradiation consisted in decreasing the enthalpy of dehydration and of decomposition. A decomposition mechanism is proposed.</description><identifier>ISSN: 0236-5731</identifier><identifier>EISSN: 1588-2780</identifier><identifier>DOI: 10.1007/s10967-012-2157-4</identifier><language>eng</language><publisher>Dordrecht: Springer Netherlands</publisher><subject>Analysis ; Asparagine ; Chemistry ; Chemistry and Materials Science ; Diagnostic Radiology ; Gamma rays ; Hadrons ; Heavy Ions ; Inorganic Chemistry ; Nuclear Chemistry ; Nuclear Physics ; Physical Chemistry</subject><ispartof>Journal of radioanalytical and nuclear chemistry, 2013, Vol.295 (1), p.379-384</ispartof><rights>Akadémiai Kiadó, Budapest, Hungary 2012</rights><rights>COPYRIGHT 2013 Springer</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c327t-67d227a485b1ef8208f1d00adc84b0a0662f9041726d406f8871f064dc8b17c13</citedby><cites>FETCH-LOGICAL-c327t-67d227a485b1ef8208f1d00adc84b0a0662f9041726d406f8871f064dc8b17c13</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktopdf>$$Uhttps://link.springer.com/content/pdf/10.1007/s10967-012-2157-4$$EPDF$$P50$$Gspringer$$H</linktopdf><linktohtml>$$Uhttps://link.springer.com/10.1007/s10967-012-2157-4$$EHTML$$P50$$Gspringer$$H</linktohtml><link.rule.ids>314,780,784,27922,27923,41486,42555,51317</link.rule.ids></links><search><creatorcontrib>Contineanu, M.</creatorcontrib><creatorcontrib>Neacsu, Ana</creatorcontrib><creatorcontrib>Contineanu, Iulia</creatorcontrib><creatorcontrib>Perisanu, Stefan</creatorcontrib><title>The effects of gamma rays upon monohydrated and anhydrous asparagine: a DSC study in sealed pans</title><title>Journal of radioanalytical and nuclear chemistry</title><addtitle>J Radioanal Nucl Chem</addtitle><description>Non-irradiated and gamma irradiated monohydrated (
l
Asn·H
2
O) and anhydrous (
l
Asn) asparagines, in solid state, were studied by means of DSC. The samples were irradiated at room temperature with gamma radiations using a
137
Cs source. The exposure doses ranged between 1 and 10 kGy. All samples were scanned in sealed pans, from room temperature to a temperature beyond the melting point. The DSC scans of
l
Asn·H
2
O samples in sealed crucibles revealed the presence of two dehydration processes and one of decomposition and only decomposition in the case of
l
Asn. The influence of gamma irradiation consisted in decreasing the enthalpy of dehydration and of decomposition. A decomposition mechanism is proposed.</description><subject>Analysis</subject><subject>Asparagine</subject><subject>Chemistry</subject><subject>Chemistry and Materials Science</subject><subject>Diagnostic Radiology</subject><subject>Gamma rays</subject><subject>Hadrons</subject><subject>Heavy Ions</subject><subject>Inorganic Chemistry</subject><subject>Nuclear Chemistry</subject><subject>Nuclear Physics</subject><subject>Physical Chemistry</subject><issn>0236-5731</issn><issn>1588-2780</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2013</creationdate><recordtype>article</recordtype><recordid>eNp9kM1OwzAMxyMEEmPwANzyAgUnbZOU2zQ-pUkcGOfgNcnWaU2mpD3s7Uk1zsiyLH_8bPlPyD2DBwYgHxODRsgCGC84q2VRXZAZq5UquFRwSWbAS1HUsmTX5CalPQA0SpUz8rPeWWqds-2QaHB0i32PNOIp0fEYPO2DD7uTiThYQ9FPPqVhTBTTESNuO2-fKNLnryVNw2hOtPM0WTzk-SP6dEuuHB6SvfuLc_L9-rJevherz7eP5WJVtCWXQyGk4VxipeoNs05xUI4ZADStqjaAIAR3DVRMcmEqEE4pyRyIKvc3TLasnJOH895tPq0778IQsc1mbN-1wVvX5fqiLAXP2-smA-wMtDGkFK3Tx9j1GE-agZ401WdNddZUT5rqKjP8zKQ867c26n0Yo89__QP9Aq0BeOM</recordid><startdate>2013</startdate><enddate>2013</enddate><creator>Contineanu, M.</creator><creator>Neacsu, Ana</creator><creator>Contineanu, Iulia</creator><creator>Perisanu, Stefan</creator><general>Springer Netherlands</general><general>Springer</general><scope>AAYXX</scope><scope>CITATION</scope></search><sort><creationdate>2013</creationdate><title>The effects of gamma rays upon monohydrated and anhydrous asparagine: a DSC study in sealed pans</title><author>Contineanu, M. ; Neacsu, Ana ; Contineanu, Iulia ; Perisanu, Stefan</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c327t-67d227a485b1ef8208f1d00adc84b0a0662f9041726d406f8871f064dc8b17c13</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2013</creationdate><topic>Analysis</topic><topic>Asparagine</topic><topic>Chemistry</topic><topic>Chemistry and Materials Science</topic><topic>Diagnostic Radiology</topic><topic>Gamma rays</topic><topic>Hadrons</topic><topic>Heavy Ions</topic><topic>Inorganic Chemistry</topic><topic>Nuclear Chemistry</topic><topic>Nuclear Physics</topic><topic>Physical Chemistry</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Contineanu, M.</creatorcontrib><creatorcontrib>Neacsu, Ana</creatorcontrib><creatorcontrib>Contineanu, Iulia</creatorcontrib><creatorcontrib>Perisanu, Stefan</creatorcontrib><collection>CrossRef</collection><jtitle>Journal of radioanalytical and nuclear chemistry</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Contineanu, M.</au><au>Neacsu, Ana</au><au>Contineanu, Iulia</au><au>Perisanu, Stefan</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>The effects of gamma rays upon monohydrated and anhydrous asparagine: a DSC study in sealed pans</atitle><jtitle>Journal of radioanalytical and nuclear chemistry</jtitle><stitle>J Radioanal Nucl Chem</stitle><date>2013</date><risdate>2013</risdate><volume>295</volume><issue>1</issue><spage>379</spage><epage>384</epage><pages>379-384</pages><issn>0236-5731</issn><eissn>1588-2780</eissn><abstract>Non-irradiated and gamma irradiated monohydrated (
l
Asn·H
2
O) and anhydrous (
l
Asn) asparagines, in solid state, were studied by means of DSC. The samples were irradiated at room temperature with gamma radiations using a
137
Cs source. The exposure doses ranged between 1 and 10 kGy. All samples were scanned in sealed pans, from room temperature to a temperature beyond the melting point. The DSC scans of
l
Asn·H
2
O samples in sealed crucibles revealed the presence of two dehydration processes and one of decomposition and only decomposition in the case of
l
Asn. The influence of gamma irradiation consisted in decreasing the enthalpy of dehydration and of decomposition. A decomposition mechanism is proposed.</abstract><cop>Dordrecht</cop><pub>Springer Netherlands</pub><doi>10.1007/s10967-012-2157-4</doi><tpages>6</tpages></addata></record> |
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| language | eng |
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| source | SpringerLink Journals - AutoHoldings |
| subjects | Analysis Asparagine Chemistry Chemistry and Materials Science Diagnostic Radiology Gamma rays Hadrons Heavy Ions Inorganic Chemistry Nuclear Chemistry Nuclear Physics Physical Chemistry |
| title | The effects of gamma rays upon monohydrated and anhydrous asparagine: a DSC study in sealed pans |
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