Differential scanning calorimetry

The influence of the black seed oil modified epoxy resin (EBSO)/monomer 3,4-epoxycyclohexylmethyl 3,4- epoxycyclohexane carboxylate (BCDE) weight ratio in the coatings based on the compounds and photoinitiator triarylsulfonium hexafluoroantimonate (TAS) on thermal properties of photocrosslinked coatings have been studied. The chemical structure of investigated UV-cured coatings was characterized by IR spectrometric analysis. Their thermogravimetric (TG) and differential scanning calorimetry (DSC) behavior were determined by TG and DSC analysis, respectively.

9p dianmotminh02 03-05-2024 4 1   Download

The 3D printing PMMA/ZrO2 filaments with a diameter of 1.75±0.05 mm were fabricated by using a single-screw extruder at temperatures of four heating zones of 190, 200, 210, and 210°C. Testing samples were prepared from the extruded filaments by using a fusion deposition modeling 3D printer and a Haake MiniJet piston injection molding machine. Fourier transform infrared spectroscopy, mechanical properties, field emission scanning electron microscopy (FESEM), differential scanning calorimetry, and thermogravimetric analysis of the filaments were investigated.

9p dianmotminh02 03-05-2024 2 1   Download

This project investigates the use of free radical initiators in the recycling of post consumer recycled high density polyethylene using reactive extrusion. Both molecular and rheological characterisation of recycled and reprocessed materials was carried out and this was followed by tensile testing of the modified materials to satisfy end use applications such as packaging and drainage piping.

154p runthenight07 01-03-2023 6 3   Download

The aim of this research project "Development of polylactic acid-polyhydroxybutyrate blends for packaging applications" is to examine the effect of temperature and concentration on the rheological and thermal properties of PLA/PHB blends as well as recommending the optimum composition of the PLA/PHB blends for use in packaging applications.

76p runthenight04 02-02-2023 7 2   Download

In this paper, the thermal properties of GFRP, CFRP, and Carbon and Glass fibers reinforced epoxy hybrid composite will be studied. The composites using are all unidirectional.

12p lucastanguyen 01-06-2020 16 4   Download

Trong nghiên cứu này, các hạt nano PLA / CS được tổng hợp bằng phương pháp nhũ tương. Những hạt nano này được đặc trưng bởi Fourier Transform Infrared (FTIR), Calorimetry Differential Scanning (DSC), Zetasizer và Kính hiển vi điện tử quét phát xạ trường (FESEM). Tính tương thích của PLA và CS đã được điều tra bởi FTIR và DSC.

5p giesumanh 04-11-2018 73 2   Download

The thermal stabilityofperoxidase fromleavesof theAfrican oil palm treeElaeis guineensis(AOPTP) at pH 3.0 was studied by differential scanning calorimetry (DSC), intrinsic fluorescence, CD and enzymatic assays.The spectral parameters asmonitoredby ellipticity changes in the far-UV CD spectrum of the enzyme as well as the increase in tryp-tophan intensity emission upon heating, together with changes in enzymatic activity with temperature were seen to be good complements to the highly sensitive but integral methodofDSC....

7p research12 29-04-2013 45 3   Download

The thermal denaturation of streptokinase fromStrepto-coccus equisimilis(SK) together with that of a set of frag-ments encompassing each of its three domains has been investigated using differential scanning calorimetry (DSC). Analysis of the effects of pH, sample concentration and heating rates on the DSC thermograms has allowed us to find conditions where thermal unfolding occurs unequivo-callyunder equilibrium.

13p research12 23-04-2013 35 3   Download

The thermal unfoldingofmyosinsubfragment 1 (S1) cleaved by trypsin was studied by differential scanning calorimetry. In the absence of nucleotides, trypsin splits the S1 heavy chain into three fragments (25, 50, and 20 kDa). This cleavage has no appreciable influence on the thermal unfolding of S1 examined in the presence of ADP, in the ternary complexes of S1 with ADP and phosphate analogs, such as orthovanadate (Vi) or berylliumfluoride (BeFx), and in the presence of F-actin.

11p tumor12 22-04-2013 34 3   Download

The structure–activity relations of a series of synthetic phenoxazone drugs with aminoalkyl side chains of variable length and different terminal groups were investigated by examining their biological activity and DNA complexation affinity. Biological activitywas determined fromtheir ability to induce apoptosis and cell cycle perturbations (activation of cell cycle checkpoints) using the human malignant MOLT-3 cell line. The thermodynamic parameters of drug– DNA complexation were determined by differential scan-ning calorimetry....

8p tumor12 20-04-2013 37 4   Download

Heteronuclear high-resolution NMR spectroscopy was employed to determine the solution structure of the excisi-onase protein (Xis)from thek-like bacteriophage HK022 and to study its sequence-specificDNA interaction. Aswild-typeXiswas previously characterizedas a generallyunstable protein, abiologicallyactiveHK022Xismutantwithasingle amino acid substitutionCys28fiSerwas used in this work.

13p fptmusic 12-04-2013 45 3   Download

The heat- and pressure-induced unfolding of the glycosyl-ated and unglycosylated forms of mature carboxypeptidase Y and the precursor procarboxypeptidase Y were analysed by differential scanning calorimetry and/or by their intrinsic fluorescence in the temperature range of 20–75
Corthe pressure range of 0.1–700 MPa. Under all conditions, the precursor form showed a clear two-state transition from a folded to an unfolded state, regardless of the presence of the carbohydrate moiety.

7p fptmusic 12-04-2013 52 2   Download

Tetracycline repressor (TetR), which constitutes the most commonmechanismof bacterial resistance to an antibiotic, is a homodimeric protein composed of two identical sub-units, each of which contains a domain possessing a helix– turn–helix motif and a domain responsible for binding tetra-cycline. Binding of tetracycline in the protein pocket is accompanied by conformational changes in TetR, which abolish the specific interaction between the protein and DNA.

10p fptmusic 12-04-2013 40 1   Download

The N-terminally myristoylated, 19-amino acid peptide, corresponding to the amino terminus of the neuronal protein NAP-22 (NAP-22 peptide) is a naturally occurring peptide that had been shown by fluorescence to cause the sequestering of a Bodipy-labeled PtdIns(4,5)P2 in a cholesterol-depend-ent manner. The present work, using differential scanning calorimetry (DSC), extends the observation that formation of a PtdIns(4,5)P2-rich domain is cholesterol dependent and shows that it also leads to the forma-tion of a cholesterol-depleted domain. ...

12p awards 06-04-2013 28 2   Download

Thermodynamic parameters describing the conformational stability of the histidine-containing phosphocarrier protein fromStreptomyces coelicolor, scHPr, have been determined by steady-state fluorescence measurements of isothermal urea-denaturations, differential scanning calorimetry at different guanidinium hydrochloride concentrations and, independently, by far-UV circular dichroism measurements of isothermal urea-denaturations, and thermal denatura-tions at fixed urea concentrations.

17p dell39 03-04-2013 38 5   Download

We used differential scanning calorimetry (DSC) and circular dichroism (CD) to investigate thermal unfolding of recombinant fibroblast isoforms ofa-tropomyosin (Tm) in comparison with that of smooth muscle Tm. These two nonmuscle Tm isoforms 5a and 5b differ internally only by exons 6b⁄6a, and they both differ from smooth muscle Tm by the N-terminal exon 1b which replaces the muscle-specific exons 1a and 2a.

13p dell39 27-03-2013 39 3   Download

Differential scanning calorimetry was used to investigate the thermal unfolding of actin specifically cleaved within the DNaseI-binding loop between residues Met47-Gly48 or Gly42-Val43 by two bacterial proteases, subtilisin or ECP32⁄grimelysin (ECP), respectively. The results obtained show that both cleavages strongly decreased the thermal stability of mono-meric actin with either ATP or ADP as a bound nucleotide.

11p viettel02 19-02-2013 51 2   Download

Phép đo sức bền cơ nhiệt TMCT (Thermal Mechanical Compression Test) được ứng dụng để đo nhiệt độ hóa mềm Tg-r (glass-rubber transition temperature) của bột gạo ở khoảng ẩm độ thấp từ 2.4-19.5 % cơ sở ướt. Kết quả cho thấy Tg-r tăng khi ẩm độ giảm. Nhiệt độ hóa mềm của gạo đo bằng phép đo sức bền cơ nhiệt tương tự với các kết quả được trình bày trong các nghiên cứu khác sử dụng các phương pháp nhiệt lượng kế quét vi sai DSC (Differential Scanning Calorimetry), phân tích cơ nhiệt (TMA-Thermo-mechanical Analysis) và phân tích cơ nhiệt động (DMTA-Dynamic Mechanical Thermal...

12p hoa_bachhop 07-03-2012 83 14   Download

Tuyển tập các báo cáo nghiên cứu khoa học trên tạp chí khoa học vật lý quốc tế đề tài: EXOTHERMIC TRANSITIONS ON COOLING OF GELATINIZED NATIVE RICE STARCH STUDIED BY DIFFERENTIAL SCANNING CALORIMETRY

11p hoami_266 15-09-2011 64 5   Download