Moisture content was measured by Q50 Thermo-Gravimetric Analysis (TGA) (TA Instruments, USA). Approximately 1 mg of spray-dried powder was placed into an aluminium standard pan (TA Instruments, USA), followed by heating from 0–150ºC at a rate of 10ºC/min. Universal analysis software (TA Instruments, USA) was used for thermal data analysis.
Q50 thermo gravimetric analysis
Manufactured by TA Instruments
Sourced in United States
The Q50 Thermo-Gravimetric Analysis (TGA) is a laboratory instrument designed to measure the change in the mass of a sample as a function of temperature or time. It provides precise and accurate measurements of a material's thermal stability and composition, allowing researchers to analyze the thermal properties of a wide range of materials.
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Lab products found in correlation
4 protocols using q50 thermo gravimetric analysis
1
Quantifying Moisture Content via TGA
2
Thermal and Structural Analysis of TLP
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The 1H-NMR spectrum of TLP was obtained by using a Bruker 400 MHz spectrometer (Bruker Corp., Karlsruhe, Germany) with D2O as a solvent. The phase transition temperature of TLP was measured by using a Q20 differential scanning calorimeter (DSC, TA Instrument, Inc., New Castle, PA, USA) with a ramping rate of 10 °C/min from −80 to 50 °C in nitrogen atmosphere. TLP was first heated to 50 °C and then quickly cooled down to −80 °C. The second heating process was performed from −80 to 50 °C to determine the transition temperature of TLP. The inflection point (the maximum slope point) was determined as the transition temperature of TLP from its DSC curve. The thermal stability of TLP was investigated by using a Q50 thermogravimetric analysis (TGA, TA Instrument, Inc., New Castle, PA, USA) instrument with a heating rate of 10 °C/min in N2 atmosphere. The temperature (T5%) with the sample mass loss of 5% was determined to be the decomposition temperature of TLP. Three to five milligrams of TLP were used for DSC and TGA measurements, respectively. TLP was measured after heating at 70 °C under vacuum over 24 h to remove the water. Scanning electron microscopy (SEM) was used to observe the surface morphology of lithium metal by using a Hitachi S-4800 SEM, (Hitachi, Ltd., Tokyo, Japan).
3
Thermal Characterization of 3D-Printed Vascular Grafts
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Thermogravimetric (TGA) and differential scanning calorimetry (DSC) studies were used to assess the thermal properties of the pure CLOP and the 3D-printed vascular grafts. Degradation temperatures of 3D-printed products and pure CLOP were determined using TGA. A small portion of the pure drug and the grafts (between 3 and 10 mg) were utilised for this analysis. TGA was conducted by employing a Q50 Thermogravimetric analysis (TA instruments, Bellingham, WA, USA). Under a nitrogen flow rate of 50 mL/min, samples were heated from 20 to 500 °C at a rate of 10 °C/min. In addition, the drug’s potential for becoming an amorphous dispersion after combining with the polymer matrix was assessed using a Q20 differential scanning calorimeter (TA instruments, Bellingham, WA, USA). Similarly, a small portion of the pure drug and the grafts (between 3 and 10 mg) were utilised for this analysis. Under a nitrogen flow rate of 50 mL/min, scans were taken from 30 to 300 °C at a rate of 10 °C/min.
4
Characterizing 3D-Printed Ocular Implants
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Chemical interactions between the components of TA-loaded PCL implants were evaluated using Spectrum Two FTIR (Perkin Elmer, Waltham, MA) at room temperature. The IR spectra were recorded in the range of 4000–600 cm−1 and analysed using Spectrum 10 software. The resolution and the number of scans to record IR spectra were 4 cm−1 and 32, respectively.
The surface morphology of TA-loaded PCL implants was evaluated using scanning electron microscopy (SEM) (Hitachi TM3030; Tokyo, Japan). The observation condition was set to EDX mode. Implants were sectioned accordingly and mounted on HITACHI SEM Cylinder Specimen Mounts.
The thermal properties of the 3D-printed implants with and without TA were evaluated. For this purpose, thermogravimetric analysis (TGA) was performed to measure the weight loss of the 3D-printed ocular implants. TGA was performed using a Q50 Thermogravimetric analysis (TA instruments, Bellingham, WA, USA). Scans were run from 25 to 500 °C, at the heating rate of 20 °C/min under a nitrogen flow rate of 40 mL/min. Moreover, a Q20 differential scanning calorimeter (DSC) (TA instruments, Bellingham, USA) was used to establish if the TA was crystalline or amorphous within the performed 3D-printed ocular implants. Scans were run from 20 °C to 300 °C at 20 °C/min under a nitrogen flow rate of 50 mL/min.
The surface morphology of TA-loaded PCL implants was evaluated using scanning electron microscopy (SEM) (Hitachi TM3030; Tokyo, Japan). The observation condition was set to EDX mode. Implants were sectioned accordingly and mounted on HITACHI SEM Cylinder Specimen Mounts.
The thermal properties of the 3D-printed implants with and without TA were evaluated. For this purpose, thermogravimetric analysis (TGA) was performed to measure the weight loss of the 3D-printed ocular implants. TGA was performed using a Q50 Thermogravimetric analysis (TA instruments, Bellingham, WA, USA). Scans were run from 25 to 500 °C, at the heating rate of 20 °C/min under a nitrogen flow rate of 40 mL/min. Moreover, a Q20 differential scanning calorimeter (DSC) (TA instruments, Bellingham, USA) was used to establish if the TA was crystalline or amorphous within the performed 3D-printed ocular implants. Scans were run from 20 °C to 300 °C at 20 °C/min under a nitrogen flow rate of 50 mL/min.
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