Structure and thermodynamic melting parameters of wheat starches with different amylose content

Bocharnikova, I.; Wasserman, L. A.; Кривандин, А. В.; Fornal, J.; Baszczak, W.; Chernykh, V. Ya.; Schiraldi, Alberto; Yuryev, Vladimir P.

doi:10.1023/b:jtan.0000011001.02981.88

Cited by 54 publications

(45 citation statements)

References 24 publications

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“…[21][22][23] The DSC, SAXS, and SEM investigations of wheat starches with different amylose content have shown that the increase of amylose content in granules leads to the structural changes on the different levels of starch macromolecular organization, particularly due to the accumulation of defects that are likely to locate both in crystalline and amorphous lamellae. 23,24 On the other hand, annealing of mutant wheat starches has not been adequately explored. While DSC and SAXS provide the valuable data on reorganization in crystalline and amorphous lamellae, 23,24 SEM allows one to detect the morphological changes of starch granules during annealing.…”

Section: Introductionmentioning

confidence: 99%

“…23,24 On the other hand, annealing of mutant wheat starches has not been adequately explored. While DSC and SAXS provide the valuable data on reorganization in crystalline and amorphous lamellae, 23,24 SEM allows one to detect the morphological changes of starch granules during annealing. In this paper, the annealing effects on the structure of granules of wheat starches with different amylose content are investigated by means of DSC, SAXS, and SEM methods.…”

Section: Introductionmentioning

confidence: 99%

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Annealing of normal and mutant wheat starches. LM, SEM, DSC, and SAXS studies

Kiseleva

Кривандин

Fornal

et al. 2005

Carbohydrate Research

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Annealing of normal and mutant wheat starches. LM, SEM, DSC, and SAXS studies

Kiseleva

Кривандин

Fornal

et al. 2005

Carbohydrate Research

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“…While membrane M4 show higher water uptake at long operation (in this data during 30 minutes water uptake experiment). The latter could be associate with structural change in crystalline and amorphous region [40][41][42][43]. Figure 9 is Ny-quist plot of membranes prepared in this works.…”

Section: Membrane Characteristicsmentioning

confidence: 84%

Roles of Preparation Method on Characteristics of Supramolecular-Structured Polymer Electrolyte Membrane Fuel Cell Based on Sulfonated Polystyrene

Hendrana¹,

Semboor

Natanael

et al. 2018

jsmi

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Polystyrene (S-PS) have been developed in Research Centre for Physics LIPI. In forming the supramolecular structure sulfonate groups in S-PS are aligned with polyethylene-graft-maleic anhydride (PE-g-MA) which carried out by dissolution of the constituent and mixing of both. The alignment of sulfonate groups in s-PS is carried out in a liquid form. Therefore, in this study, the effect of concentration of the solution of both polymers constituent to the alignment of the sulfonate groups and the characteristics of the membrane produced is studied. Scanning Electron Microscope (SEM) images show that all membranes prepared are rigid. Differential Scanning Calorimetry (DSC) studied show very significance differences in its crystal sizes. XRD diffraction data also support the previous results. Membrane prepared from very dilute solution having better ion exchange capacity (IEC), water uptake and ionic conductivity. Therefore, the experiments results showing that very low concentration of polymer constituent, clearly, produced better interaction of both, which agree with hyphotesis in this work where supramolecular structure can be formed by mixing two very dilute polymer solutions.Keywords: PEMFC, Sulfonated polystyrene, PE-g-MA, Supramolecular structure ABSTRAK PERAN METODE PREPARASI PADA KARAKTETISTIK DARI POLIMER ELEKTROLIT MEMBRAN FUEL CELL DENGAN STRUKTUR SUPRAMOLEKULAR BERBASIS POLISTIREN TERSULFONASI.Polimer Elektrolit Membran Fuel Cell dengan struktur supramolekular berbasis polistirena tersulfonasi (S-PS) telah dikembangkan di Pusat Penelitian Fisika LIPI. Pada pembentukan struktur supramolekular gugus sulfonat pada polistirena tersulfonasi diarahkan dengan polietilen-graft-anhidrida maleat (PE-g-MA) yang dilakukan dengan melarutkan kedua bahan penyusun tersebut. Pengarahan gugus sulfonat dari S-PS dilakukan dalam kondisi cair. Karenanya, dalam studi ini, efek dari konsentrasi dari kedua larutan polimer penyusun pada pengarahan gugus karbonat dimaksud dan karakteristik-karakteristik dari membran yang dihasilkan akan dipelajari. Image SEM menunjukkan bahwa semua membran yang dibuat adalah rigid. Studi DSC menunjukkan terdapat perbedaan yang sangat berarti pada ukuran kristal. Data XRD juga mendukung hasil-hasil yang diperoleh. Membran yang dibuat dengan larutan yang sangat encer memiliki kapasitas petukaran ion (EIC), tangkapan-air dan konduktifitas ionik yang lebih baik. Oleh karenanya, data eksperimen menunjukkan

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“…For starches with a symmetric DSC signal, a previously reported method (Bocharnikova et al, 2003;Protserov, Karpov, Kozhevnikov, Wasserman & Yuryev, 2000;Wasserman et al, 2001) was used to evaluate the melting cooperative unit, ,…”

Section: High-sensitivity Differential Scanning Microcalorimetrymentioning

confidence: 99%