Chemistry Journal of Moldova
- SCOPUS Journal Metrics for year 2023:
- CiteScore 0.9;
- Source Normalized Impact per Paper (SNIP) 0.094;
- SCImago Journal Rank (SJR) 0.133.
TOP DOWNLOADED ARTICLES
1. SONOCHEMICAL SYNTHESIS OF HEMATITE
NANOPARTICLES
Mihail Iacob
(downloads: 1148)
2. SYNTHESIS OF DIFFERENT STRUCTURAL TYPES
OF ZEOLITES IN THE
HALLOYSITE-DOLOMITE-OBSIDIAN SYSTEM
Gunel Mamedova
(downloads: 782)
3. A NOVEL GREEN SYNTHESIS OF NICKEL OXIDE
NANOPARTICLES USING ARABIC GUM
Saeid Taghavi Fardood, Ali Ramazani, Sajjad Moradi
(downloads: 657)
4. SYNTHESIS, CHARACTERIZATION AND
MOLECULAR DOCKING OF CHLORO-SUBSTITUTED
HYDROXYXANTHONE DERIVATIVES
Emmy Yuanita, Harno Dwi Pranowo, Mustofa Mustofa, Respati Tri Swasono, Jufrizal Syahri, Jumina Jumina
(downloads: 513)
5. ROLE OF CYCLODEXTRINS IN NEW
ANTIMYCOBACTERIAL FORMULATIONS
Veaceslav Boldescu, Fliur Macaev, Gheorghe Duca
(downloads: 469)
6. SYNTHETIC TRANSFORMATIONS OF
ENT-KAURENOIC ACID
Olga Morarescu
(downloads: 426)
7. INVESTIGATION OF VARIOUS INFLUENCING
FACTORS OF HYDROTHERMAL SYNTHESIS OF
ANALCIME ZEOLITE
Gunel Mamedova, Gunel Nasirli
(downloads: 422)
8. STUDIES ON THE WATER SOLUBILIZATION
PROCESSES OF OENOTANNINS AND THEIR
PHYSICO-CHEMICAL PROPERTIES
Gh. Duca, T. Lupaşcu, P. Vlad, V. Kulciţki, R. Nastas
(downloads: 411)
9. ORGANOCHLORINE PESTICIDES RESIDUES IN
SOIL OF SOROCA DISTRICT, REPUBLIC OF
MOLDOVA
Elena Culighin
(downloads: 381)
10. DESIGN AND SYNTHESIS OF TWO
BICYCLO[3.3.1]NONANE-STEROID
DERIVATIVES
Lauro Figueroa, Alejandra Garcimarero, Rolando Garcia, Francisco Diaz, Marcela Rosas, Virginia Mateu, Maria Lopez, Lenin Hau, Tomas Lopez, Abelardo Camacho, Yaritza Borges
(downloads: 362)
NANOPARTICLES
Mihail Iacob
(downloads: 1148)
2. SYNTHESIS OF DIFFERENT STRUCTURAL TYPES
OF ZEOLITES IN THE
HALLOYSITE-DOLOMITE-OBSIDIAN SYSTEM
Gunel Mamedova
(downloads: 782)
3. A NOVEL GREEN SYNTHESIS OF NICKEL OXIDE
NANOPARTICLES USING ARABIC GUM
Saeid Taghavi Fardood, Ali Ramazani, Sajjad Moradi
(downloads: 657)
4. SYNTHESIS, CHARACTERIZATION AND
MOLECULAR DOCKING OF CHLORO-SUBSTITUTED
HYDROXYXANTHONE DERIVATIVES
Emmy Yuanita, Harno Dwi Pranowo, Mustofa Mustofa, Respati Tri Swasono, Jufrizal Syahri, Jumina Jumina
(downloads: 513)
5. ROLE OF CYCLODEXTRINS IN NEW
ANTIMYCOBACTERIAL FORMULATIONS
Veaceslav Boldescu, Fliur Macaev, Gheorghe Duca
(downloads: 469)
6. SYNTHETIC TRANSFORMATIONS OF
ENT-KAURENOIC ACID
Olga Morarescu
(downloads: 426)
7. INVESTIGATION OF VARIOUS INFLUENCING
FACTORS OF HYDROTHERMAL SYNTHESIS OF
ANALCIME ZEOLITE
Gunel Mamedova, Gunel Nasirli
(downloads: 422)
8. STUDIES ON THE WATER SOLUBILIZATION
PROCESSES OF OENOTANNINS AND THEIR
PHYSICO-CHEMICAL PROPERTIES
Gh. Duca, T. Lupaşcu, P. Vlad, V. Kulciţki, R. Nastas
(downloads: 411)
9. ORGANOCHLORINE PESTICIDES RESIDUES IN
SOIL OF SOROCA DISTRICT, REPUBLIC OF
MOLDOVA
Elena Culighin
(downloads: 381)
10. DESIGN AND SYNTHESIS OF TWO
BICYCLO[3.3.1]NONANE-STEROID
DERIVATIVES
Lauro Figueroa, Alejandra Garcimarero, Rolando Garcia, Francisco Diaz, Marcela Rosas, Virginia Mateu, Maria Lopez, Lenin Hau, Tomas Lopez, Abelardo Camacho, Yaritza Borges
(downloads: 362)
PHARMACEUTICAL AMORPHOUS ORGANIC MATERIALS CHARACTERIZATION BY USING THE DIFFERENTIAL SCANNING CALORIMETRY AND DYNAMIC MECHANICAL ANALYSIS
Author(s):
Field: Physical chemistry and chemical physics
Type: Research paper
Issue: 2011 Volume 6, no.2
Pages: 91-95
Ion Dranca, Igor Povar and Tudor Lupascu
Field: Physical chemistry and chemical physics
Type: Research paper
Issue: 2011 Volume 6, no.2
Pages: 91-95
DSC –differential scanning calorimetry; DMA –dynamic mechanical analysis; drugs; excipients; glass transition; α- and β –relaxations; crystallization; kinetics.
Full Text (PDF): Download
DOI: dx.doi.org/10.19261/cjm.2011.06(2).19
Graphical Abstract: This research has been carried out in order to demonstrate the use of differential scanning calorimetry (DSC) in detecting and measuring α- and β-relaxation processes in amorphous pharmaceutical systems. DSC has been employed to study amorphous samples of poly (vinylpyrrolidone) (PVP), indomethacin (InM), and ursodeoxycholic acid (UDA) that are annealed at temperature (Ta) around 0.8 of their glass transition temperature (Tg). Dynamic mechanical analysis (DMA) is used to measure β- relaxation in PVP. Yet, the DSC has been used to study the glassy indomethacin aged at 0 and -10 oC for periods of time up to 109 and 210 days respectively. The results demonstrate the emergence of a small melting peak of the α-polymorph after aging for 69 days at 0°C and for 147 days at -10°C (i.e., ~55°C below the glass transition temperature) that provides evidence of nucleation occurring in the temperature region of the β-relaxation.
Downloads: 24