Fabrication of polyaniline/TiO2 nanocomposite ammonia vapor sensor

Polyaniline/Titanium dioxide (PANi/TiO2) nanocomposite was fabricated from PANi, prepared by oxidative chemical polymerization and TiO2, synthesized by sol gel method. The PANi/TiO2 thin film sensors were prepared by spin coating technique. PANi/TiO2 nanocomposites were characterized by XRD and SEM. The cross sensitivity of thin film sensor indicate that the sensor exhibit selectivity to ammonia (NH3). The gas sensing measurements were carried out for different concentrations of NH3. The gas sensing study revealed that the response value increases with increasing concentration of NH3. Moreover, as concentration of NH3 increases, the response time decreases while recovery time increases, which can be attributed to the varying adsorption and desorption rates of an ambient gas with increasing concentration. When you are citing the document, use the following link http://essuir.sumdu.edu.ua/handle/123456789/2791

Effect Of Annealing On Structure, Morphology, Electrical And Optical Properties Of Nanocrystalline TiO2 Thin Films

Semi-transparent and highly conducting nanostructured titanium oxide thin films have been prepared by sol-gel method. Thin films of TiO2 deposited on glass substrates using spin coating technique and the effect of annealing temperature (400 - 700 °C) on structural, microstructural, electrical and optical properties were studied. The X-ray diffraction and Atomic force microscopy measurements confirmed that the films grown by this technique have good crystalline tetragonal mixed anatase and rutile phase structure and homogeneous surface. The study also reveals that the rms value of thin film roughness increases from 7 to 19 nm. HRTEM image of TiO2 thin film (annealed at 700 °C) shows that a grain of about 50 - 60 nm in size is really aggregate of many small crystallites of around 10 - 15 nm. Electron diffraction pattern shows that the TiO2 films exhibited tetragonal structure. The surface morphology (SEM) of the TiO2 film showed that the nanoparticles are fine with an average grain size of about 50 - 60 nm. The optical band gap slightly decreases from 3.26 - 3.24 eV and the dc electrical conductivity was found in the range of 10-6 to 10-5(Ω·cm)-1 when the annealing temperature is changed from 400 to 700 °C. It is observed that TiO2 thin film annealed at 700 °C after deposition provide a smooth and flat texture suited for optoelectronic applications. When you are citing the document, use the following link http://essuir.sumdu.edu.ua/handle/123456789/967

Fabrication of polyaniline/TiO2 nanocomposite ammonia vapor sensor

Polyaniline/Titanium dioxide (PANi/TiO2) nanocomposite was fabricated from PANi, prepared by oxidative chemical polymerization and TiO2, synthesized by sol gel method. The PANi/TiO2 thin film sensors were prepared by spin coating technique. PANi/TiO2 nanocomposites were characterized by XRD and SEM. The cross sensitivity of thin film sensor indicate that the sensor exhibit selectivity to ammonia (NH3). The gas sensing measurements were carried out for different concentrations of NH3. The gas sensing study revealed that the response value increases with increasing concentration of NH3. Moreover, as concentration of NH3 increases, the response time decreases while recovery time increases, which can be attributed to the varying adsorption and desorption rates of an ambient gas with increasing concentration. When you are citing the document, use the following link http://essuir.sumdu.edu.ua/handle/123456789/2791

Recognition of Handwriting Characters Using an Artificial Neural Network

Research in the area of handwriting recognition has several applications, including the digitization of handwritten documents and the ability to use handwriting as an input method for gadgets. In this project, an Artificial Neural Network (ANN) was used to produce a handwriting recognition system, and the Streamlit library was used to develop a graphical user interface (GUI). We preprocessed the photos by scaling, turning to grayscale, and normalising pixel values using a dataset of handwritten numbers from Kaggle. Two hidden layers with ReLU activation and Softmax activation for the output layer made up the ANN model's design. After adding the pytesseract library, the model had a 90% accuracy rate on the test dataset. Users could draw a digit and get results for digit recognition using the GUI interface. Future studies could concentrate on increasing precision and broadening the system's ability to recognise handwritten text. The overall potential of ANN and GUI technologies for handwriting recognition applications is demonstrated by this project. &nbsp

Growth of CaF2 buffer on Si using low energy cluster beam deposition technique and study of its properties

International audienc

Acute fulminant myocarditis at autopsy: A clinical masquerade?

Background: Myocarditis is a diagnostic challenge in cardiology. The diagnosis is frequently made post-mortem, with no clinical evidence of myocardial failure. Autopsy studies report a frequency of myocarditis ranging from 0.11-0.55% in the general population. Myocarditis is presents with varied clinical manifestations, ranging from asymptomatic to sudden cardiac death, sometimes mimicking the Myocardial Infarction (MI). Case Summary: A 55 years old male presented with sudden onset of chest pain, breathlessness at rest and flu like symptoms 5-6 days prior to admission. There was tachycardia with low Systolic blood pressure and muffled heart sounds. ECG showed ST segment & T wave changes. CK-MB was moderately raised. Though clinically diagnosed as MI and treated, patient expired the next day. On autopsy, gross examination of heart revealed no significant findings. Histological examination revealed fulminant myocarditis involving right ventricle, interventricular septum, left ventricular wall and A-V Node. Conclusion: It is not uncommon to find Myocarditis patients presenting with manifestations of MI and these cases often misdiagnosed as MI. In such cases, myocarditis should be considered as a differential diagnosis. Endomyocardial biopsies and histological examination of the myocardium is absolutely necessary for reliable diagnosis of the disease

Implementation of a pharmacogenomics consult service to support the INGENIOUS trial

Hospital systems increasingly utilize pharmacogenomic testing to inform clinical prescribing. Successful implementation efforts have been modeled at many academic centers. In contrast, this report provides insights into the formation of a pharmacogenomics consultation service at a safety-net hospital, which predominantly serves low-income, uninsured, and vulnerable populations. The report describes the INdiana GENomics Implementation: an Opportunity for the UnderServed (INGENIOUS) trial and addresses concerns of adjudication, credentialing, and funding

Bacterial strains from floodplain soils perform different plant-growth promoting processes and enhance cowpea growth

ABSTRACT Certain nodulating nitrogen-fixing bacteria in legumes and other nodule endophytes perform different plant-growth promoting processes. The objective of this study was to evaluate 26 bacterial strains isolated from cowpea nodules grown in floodplain soils in the Brazilian savannas, regarding performance of plant-growth promoting processes and ability to enhance cowpea growth. We also identified these strains by 16S rRNA sequencing. The following processes were evaluated: free-living biological nitrogen fixation (BNF), solubilization of calcium, aluminum and iron phosphates and production of indole-3-acetic acid (IAA). The abilities to nodulate and promote cowpea growth were evaluated in Leonard jars. Partial sequencing of the 16S rRNA gene identified 60 % of the strains as belonging to genus Paenibacillus. The following four genera were also identified: Bacillus, Bradyrhizobium, Enterobacter and Pseudomonas. None of the strains fixed N2 free-living. Among the strains, 80 % solubilized Ca phosphate and one solubilized Al phosphate and none solubilized Fe phosphate. The highest IAA concentrations (52.37, 51.52 and 51.00 μg mL−1) were obtained in the 79 medium with tryptophan by Enterobacter strains UFPI B5-7A, UFPI B5-4 and UFPI B5-6, respectively. Only eight strains nodulated cowpea, however, all increased production of total dry matter. The fact that the strains evaluated perform different biological processes to promote plant growth indicates that these strains have potential use in agricultural crops to increase production and environmental sustainability