Dwell time characterization of DNA translocation through ITO-SiNx nanopores

A corundum-type structure of cobalt niobate (Co4Nb2O9) has been synthesized by a solid-state reaction. The formation of the Co4Nb2O9 phase in the calcined powders was investigated as a function of calcination conditions by differential thermal analysis (DTA) and X-ray diffraction (XRD) techniques. Morphology and particle size have been determined by scanning electron microscopy (SEM). It was found that the minor phases of unreacted Co3O4 tend to form together with the columbite CoNb2O6 phase at a low calcination temperature and short dwell time. It seems that the single-phase of Co4Nb2O9 in a corundum phase can be obtained successfully at the calcination conditions of 900°C for 60 min, with heating/cooling rates of 20°C /min.

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Characterization of the Silver Species Released From Clothing by Single Particle–Inductively Coupled Plasma–Mass Spectrometry Using a Microsecond Dwell Time

Analytical Letters ◽

10.1080/00032719.2021.1950166 ◽

2021 ◽

pp. 1-16

Author(s):

Tugba Nur Akbaba ◽

Nusret Ertas ◽

Orkun Alp

Keyword(s):

Mass Spectrometry ◽

Single Particle ◽

Inductively Coupled Plasma ◽

Dwell Time ◽

Inductively Coupled ◽

Plasma Mass Spectrometry

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Characterization of Impurities in Acarbose Hydrate by using LCMS/MS and NMR

International Journal of Research in Pharmaceutical Sciences ◽

10.26452/ijrps.v11i4.4885 ◽

2020 ◽

Vol 11 (4) ◽

pp. 8124-8129

Author(s):

Maruthi R ◽

Chandan R S ◽

Anand Kumar Tengli

Keyword(s):

Dwell Time ◽

Hplc Method ◽

Type Ii ◽

Reverse Phase ◽

Type Analysis ◽

Diabetes Mellitus Type Ii ◽

Injection Volume ◽

Rp Hplc ◽

Bulk Drug

An accurate and lively LC-MS/MS and NMR analytical methods have been developed for the recognition and characterization of key impurities in Acarbose. Acarbose is a diabetic medication used to treat Diabetes mellitus Type II and prediabetes in certain countries. Three unknown impurities were detected in Acarbose hydrate bulk drug substance using RP-HPLC method at RT 17.65 min, 18.4 min and 25.85 min. Such impurities have been separated by HPLC and are further characterized by the use of techniques LC-MS / MS and NMR. The C18 reverse phase column and Methanol and Ammonium Type analysis (80:20) have been conducted for the purpose of analysis. With an injection volume of 10 μL, the flow rate was maintained at 0,5mL / min. With binary gradient program, the separations were achieved and the column was kept at ambient temperature. The MS conditions adopted for this analysis with a scan range of m/z = 50 to 500 with a dwell time of 3 seconds. NMR was carried out using DMSO as solvent. Based on spectral data, the impurities have been characterized as IMP B, IMP D and IMP E.

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Preparation and Characterization of Amorphous Al-Based Metal Foams

Materials Science Forum ◽

10.4028/www.scientific.net/msf.816.682 ◽

2015 ◽

Vol 816 ◽

pp. 682-687

Author(s):

Cong Bo Li ◽

Wei Wei Chen ◽

Lu Wang

Keyword(s):

Mechanical Properties ◽

Mechanical Behavior ◽

Intermetallic Compounds ◽

Dwell Time ◽

Metal Foam ◽

Metal Foams ◽

Plasma Sintering ◽

Spark Plasma ◽

Xrd Patterns

Amorphous Al-Cu-Ti metal foams with the porosity of 65% were prepared by spark plasma sintering with both the diameter and height of 10 mm. The SPS process was carried out under the pressure, the dwell time and the temperatures of 300 MPa, 5min and 623-673K, respectively. The microstructure and mechanical behavior of the amorphous Al-Cu-Ti metal foams were investigated. The results showed that sintering at high temperatures improved the crystallinity and adhesion between particles. The intermetallic compounds, i.e. Al-Ti, Al-Cu and Al-Cu-Ti were identified from the XRD patterns. It was found that weak adhesion and irregular shape of NaCl might reduce the mechanical properties. The highest strength of amorphous Al-based metal foam sintered at 653K, 300MPa was 7.97MPa.

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