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Synthesis and anti-fungal effect of silver nanoparticles–chitosan composite particles

Synthesis and anti-fungal effect of silver nanoparticles–chitosan composite particles

formation of silver nanoparticles was evaluated using FTIR, XRD, and EDS mapping. The TEM image shows that the diameter of the fabricated silver nanoparticles was 15 ± 3.3 nm. The UV-Vis spectroscopy shows a characteristic peak at approximately 410 nm, confirming the size of silver particle is within the nanoscale range. The peak wavelength does not substantially change even when various concentra- tions of NaOH are used. Compared with other approaches, the main advantages of this approach were: i) uniform-sized spheres could be continuously fabricated in a one step pro- cess, ii) silver nanoparticles could be obtained and stabilized simultaneously in a chitosan matrix, and iii) spherical shapes could have a wider range of applications compared with film structures. Because of the properties of silver nanoparticles, the synthesized spheres could become potential bactericidal agents for water disinfection, anti-pathogens, or surface plasma resonance enhancers. In addition, in this study we also found that chitosan and Ag@chitosan can inhibit the growth of Cm but not Ac, suggesting that chitosan and Ag@ chitosan may be a potential reagent to enhance Ac production by preventing other microorganism growth.

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Sulfate Exchange of the Nitrate Type Layered Hydroxide Nanosheets of Ln2(OH)5NO3·nH2O for Better Dispersed and Multi color Luminescent Ln2O3 Nanophosphors (Ln = Y0 98RE0 02, RE = Pr, Sm, Eu, Tb, Dy, Ho, Er, and Tm)

Sulfate Exchange of the Nitrate Type Layered Hydroxide Nanosheets of Ln2(OH)5NO3·nH2O for Better Dispersed and Multi color Luminescent Ln2O3 Nanophosphors (Ln = Y0 98RE0 02, RE = Pr, Sm, Eu, Tb, Dy, Ho, Er, and Tm)

tions of both the types of layered materials and their calcination products via the combined techniques of XRD, FTIR, DTA/TG, FE-SEM/TEM, BET, particle siz- ing, and photoluminescence spectroscopy have led to the following main conclusions: (1) anion exchange did not bring about any appreciable change to the layered structure and the two-dimensional crystallite morph- ology, but induces a basal-spacing contraction from ~0.886 to 0.841 nm, (2) the interlayer SO 4 2− significantly raises the

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The Magnetic Properties of Alpha Phase for Iron Oxide NPs that Prepared from its Salt by Novel Photolysis Method

The Magnetic Properties of Alpha Phase for Iron Oxide NPs that Prepared from its Salt by Novel Photolysis Method

FTIR (65-FT-IR, Perkin Elmer, USA) and UV-Vis spectrophotometer (JASCO Asia Portal UV-visible model V-650) were used to determine the functional group and energy gap of powder respectively while the size of particles and the identity of it was showed using TEM (JEOL JEM -2100) and XRD spectrum (Shimadzu-XRD-6000) with Cu Kα radiation respectively and the magnetic properties of it was determined using Commercial Quantum Design MPMS-XL-5.

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finally passing ethanol vapour through the activated carbon obtained. The carbonized coconut fibre and carbon nanospheres formation was investigated through XRD, SEM, TEM, EDX, FTIR and TGA analysis. SEM investigations confirms the production of carbon nanospheres with diameters between 30-150nm. The observations also show that the CNS are perfect spheres with smooth surfaces. Multiple conglomerates of the spheres are observed and also bead-like lumps are observed in both SEM and TEM. The nanosphere obtained can be used in Lithium-ion batteries, heat transfer fluids and medical field for drug delivery.

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Loading of Anti Cancer Drug on Carbon Nanotubes Seema Manchanda*, Madhuri Sharon, Maheshwar Sharon

Loading of Anti Cancer Drug on Carbon Nanotubes Seema Manchanda*, Madhuri Sharon, Maheshwar Sharon

Carbon Nanotubes exhibit many unique intrinsic physical and chemical properties and have been intensively explored for biological and biomedical applications in the past few years. The presented work is a prelude in the direction of using Carbon Nano tubes as a vehicle for drug delivery to the desired sites. Anti cancer drug, Doxorubicin is loaded on functionalized Multiwalled Carbon Nano tubes at different pH conditions. Analysis done was FTIR, ATR, TEM, and UV Visible spectroscopy.

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Materials and Methods: Cut leaf segments of Withania Somnifera (Ashwagandha) were used to isolate the fungi. Fresh cultures of fungi were inoculated in Erlenmeyer flask of 100 ml Malt Glucose Yeast Peptone (MGYP) broth and incubated at 29ºC for 72 hours for the biomass to grow. Biomass was filtered and cell free fungal filtrate was used further. Biosynthesized AgNPs were characterized by visual observation, Ultraviolet- Visible (UV-Vis) spectrophotometer, Transmission Electron Microscopy (TEM), Selected Area Electron Diffraction Analysis (SAED) and Fourier Transform Infrared Spectroscopy (FTIR). Antibacterial efficacy was evaluated by agar diffusion method

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Molecular identification of fungi microfossils in a Neoproterozoic shale rock

Molecular identification of fungi microfossils in a Neoproterozoic shale rock

Acknowledgments: The Africa Museum (Tervuren, Belgium) is thanked for granting access to the Kanski drillcore. We thank Diamond Light Source and their beamline scientists for access to beamline B22 (SM15050) and I08 (SP14953) that contributed to the results presented here. K. Baert (Vrije Universiteit Brussel) and P. Madau (4MAT Department, Université Libre de Bruxelles) are acknowledged for help in the early stage of the study. C. Strullu-Derrien, N. McLoughlin, and three other anonymous referees are thanked for constructive reviews and S. Elrick (ISGS) for comments on the manuscript. Funding: This research was supported by the “Van Buren” funds from ULB and the Fonds National de la Recherche Scientifique (FRS-FNRS PDR T.1012.14). We also acknowledge the financial support of the Helmholtz Recruiting Initiative grant no. I-044-16-01 to L.G.B. Author contributions: S.B. directed the research and wrote the manuscript. R.W. did all TEM-related analysis, imaging, and interpretation. A.Sc. did the ion milling. S.B. and L.G.B. acquired and interpreted the FTIR dataset. C.C. performed the WGA staining. T.A., M.K., S.B., L.G.B., and A.St. acquired, data processed, and interpreted the XANES data. A.St. did the Raman analysis. F.D. and A.P. did the stratigraphy and

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Promoting Functionalized Multi Walled Carbon Nano Tubes Using neem and flax oil for Resentence Pathogenic Bacteria

Promoting Functionalized Multi Walled Carbon Nano Tubes Using neem and flax oil for Resentence Pathogenic Bacteria

of MWCNTs containing functional groups treated with both oil separately. The results were examined by using Scanning Electron Microscopy (SEM) and Transmission Electron Microscopy (TEM) to study the morphology of the surface treated with neem and flax oil. Fourier transformed infrared spectroscopy (FTIR) shows the formation of functional group on to MWCNTs surface such as C=O and COOH. Furthermore, improving the antimicrobial activity of functionalized MWCNTs treated with oils and reducing colonies at high consecrations of samples against E. coli, P. aeruginosa and S. aureus after incubated for 24h which reveals the ability of functionalized MWNTs in removal pathogens and enhanced the adsorption of bacteria on the surface of (MWCNTs), which are used in environmental applications and contaminated water such as filters.

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Synthesis of Nitrogen and Sulfur Co doped Carbon Dots from Garlic for Selective Detection of Fe3+

Synthesis of Nitrogen and Sulfur Co doped Carbon Dots from Garlic for Selective Detection of Fe3+

Fluorescence emission spectral measurements were car- ried out using a Shimadzu RF-5301 fluorescence spec- trophotometer. Absorbance spectra were acquired by using a Shimadzu UV-3600 spectrophotometer. The sur- face morphology of the as-prepared CDs was investi- gated using a transmission electron microscope (TEM) (JEOL). X-ray diffraction (XRD) patterns of CDs were obtained using a Bruker D8 Advance X, Pert diffractometer (Cu Kα: λ = 1.5406 Å), in the range of 10°–70° at a scan rate of 4°min − 1 . Atomic force microscopy (AFM) images were recorded with a Veeco DI-3100 instrument. Fourier trans- form infrared spectroscopy (FTIR) was performed on an FTIR spectrophotometer (IFS-66 V/S). X-ray photoelectron spectroscopy (XPS) was conducted on an ESCALAB250 spectrometer. Binding energy of C 1 s at 284.7 eV was set as the calibration. The absolute PL QYs of the solution sample were measured by a fluorescence spectrometer (FLS920P, Edinburgh Instruments) equipped with an inte- grating sphere with its inner face coated with BENFLEC.

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TEM Studies of Modulated Mixed A-site Perovskites

TEM Studies of Modulated Mixed A-site Perovskites

With most of my time split between the office and the lab, I’m gracious to also say that the other members of our group truly deserve my thanks as well. I want to therefore thank Beth Guiton, Yuqi Li, Vincent West, David Stein, and Joe Bennett. Although not a member of our group, I’ve spent almost as much time with Douglas M. Yates, who as the technical director of the Penn Regional Nanotechnology Facility has had to deal with my many ambushes filled with questions and deserves a great deal of credit for any success I’ve had on the TEM.

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Transanal Endoscopic Microsurgery (TEM) for Rectal Neoplasms

Transanal Endoscopic Microsurgery (TEM) for Rectal Neoplasms

Mean operating time in our series was 118 ± 46 (60 - 220) minutes. Given that the first cases were part of the learning curve, we can observe that operating time de- creased although not significantly, due to the sample size after patient number 5 (132 vs. 110 minutes) (Figure 3). In our series, we encountered intraoperative difficult- ties in three patients, two of whom required laparotomy because they presented a peritoneal opening that was not susceptible to repair by TEM. Bretagnol et al. [21] report a 12% rate of technical difficulties, including intraperi- toneal perforation, pneumorectum leakage and bleeding. Gavagn [22] and Ramwell et al. [23] conclude that entry into the peritoneum does not necessarily increase the risk of morbidity.

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Design of tem cell to test the electromagnetic sensor

Design of tem cell to test the electromagnetic sensor

Partial discharge in transformer insulation can be detected by the product produced during the PD event. Electromagnetic signal is one kind of the product that produces by the PD event. By using appropriate sensor, the electromagnetic signal can be captured thus detect the PD event in the transformer insulation. The method capturing the electromagnetic signals to detect PD event in transformer has advantage compare to other PD detection methods. The advantage mainly due the electromagnetic signal prone to the disturbance noise around the transformer. To be able to capture the electromagnetic signals, a sensor with capability to detect the electromagnetic signals is needed. The capability of a sensor can be tested using a TEM cell. In this paper discussed the design of TEM cell (Transverse Electromagnetic cell) which able to test a sensor such the sensor which use to detect the PD event in transformer. The TEM cell is an open cell type and construct using alumina as the material. The TEM cell has length of 1200 mm and height 105 mm. The TEM cell shown has a good capability to test the sensor which designed to detect the PD in transformer.

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Phenotypic and molecular characterization of SHV, tem, OXA and Extended Spectrum β lactamase produced by Klebsiella pneumonia isolates in a Adjara Hospital

Phenotypic and molecular characterization of SHV, tem, OXA and Extended Spectrum β lactamase produced by Klebsiella pneumonia isolates in a Adjara Hospital

OXA β-lactumaseswere long recognized as a less common but also plasmid-mediated β-lactumase variety that could hydrolyze oxacillin and related anti-staphylococcal Penicillins. These β-lactumases differ from the TEM and SHV enzymes in that they belong to molecular class D and functional group 2d. The OXA-type β-lactumases confer resistance to Ampicillin and Cephalothin and are characterized by their high hydrolytic activity against Oxacillin and Cloxacillin and the fact that they are poorly inhibited by clavulanic acid. Aminoacid substitutions in OXA enzymes can also give the ESBL phenotype.

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Analysis, Characterization, and Optimization of Polyvinylacrylamide Conversion into Polyvinylamine via the Hofmann Rearrangement.

Analysis, Characterization, and Optimization of Polyvinylacrylamide Conversion into Polyvinylamine via the Hofmann Rearrangement.

This work is dedicated to all the important people in my life who have helped me on the long road to higher education. My sincerest thanks go to Dr. Samuel Hudson, who always listened to my ideas, helped sculpt them into a focused and insightful thesis, and always tried to be available whenever I had concerns and questions. I also want to thank Ms. Birget Andersen and the people of the College of Textiles Analytical Instrumentation and Services Lab, who trained me on the FTIR instrumentation that allowed me to collect my most important data, and whose data recovery efforts on my behalf were greatly appreciated. I am also deeply thankful to Mr. Charles Domingo, whose advice helped guide me through some of the ups and downs of preparing this thesis. Finally, I am eternally grateful for the

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Abstract: The Quantitation of Billirubin has been achieved using FTIR spectroscopy. The FTIR spectra of

Abstract: The Quantitation of Billirubin has been achieved using FTIR spectroscopy. The FTIR spectra of

Table-1. gives FTIR data obtained from Fig.1(a),(b),(c),(d),(e). around 1400 cm -1 . The table reveals IR absorbance, calculated from transmittance (%), in blood serum treated with Bilirubin of concentration ranging from 100 to 500 mg/dl with an interval of 100 mg/dl. A plot is drawn between Absorbance on Y – axis and Bilirubin concentration (gm/dl) on X – axis . It is a straight line with +ve slope and also +ve Y – intercept, the linear regression equation of which is

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Impact & Analysis of DVROFT Filter on TEM          Image

Impact & Analysis of DVROFT Filter on TEM Image

It is clearly visible that DVROFT filter is quite effective for denoising the images both in case of greyscale TEM and colored TEM image with the exception of gaussian noise It is observed that the SNR and PSNR ratios obtained for TEM image is much higher than those obtained for normal image. Also, though DVROFT retains the structure in the image but do not capture very fine details due to smoothing.

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TEM Sample Preparation for Microcompressed Nanocrystalline Ni

TEM Sample Preparation for Microcompressed Nanocrystalline Ni

A focused ion beam (FIB) apparatus (Hitachi High- Technologies Corporation FB-2100) was used to fabricate the Ni plate for obtaining a microsized cylinder and a TEM sample from the deformed microcylinder. An FIB column in the instrument supplies Ga ions accelerated at 40 kV and beam currents in the range 0.01 nA to 35 nA. Cylindrical micropillars for microcompression tests were fabricated by a Hitachi FB-2100 focused ion beam system. Subsequent fine- milling processes were applied with lower milling currents (e.g. 0.02 nA) and acceleration voltage (e.g. 40 kV) thereafter to carefully eliminate the visible tapering of sidewalls of the sample. A schematic of the fabrication procedure of micropillars are shown in Figure 1. The FIB column has

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Effect of Aloe vera on synthesis of nano Tin (iv) oxide

Effect of Aloe vera on synthesis of nano Tin (iv) oxide

The prepared micro and nano SnO were characterized by X-ray diffraction (XRD), Fourier-transform infrared spectroscopy (FTIR), and scanning electron microscope (SEM) to identify the structural features, functional groups, and the morphology. The summary of the preparation process is presented in Figure 1.

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Photons Are EM Energy Superpositioned on TEM Waves

Photons Are EM Energy Superpositioned on TEM Waves

The study displays that TEM waves (e.g. radio waves, light) consist of low frequency plane TEM waves where the ra- dio frequency energy or light energy is superpositioned on these low frequency TEM waves. The superpositioned en- ergy can be discrete and where its frequency ν determines its energy hv and where this superpositioned energy hv is the photon. The study shows that photons and TEM waves are described by the laws of electromagnetism. Hence, there is a duality between the photon and the TEM wave and also a duality between electromagnetism and quantum theory in this case. The low frequency plane TEM waves originate from a singularity in universe and have been described earlier. The study describes how energy from a generator, from light bulbs and radio antennas is superpositioned on low frequency TEM waves, resulting in medium frequency TEM waves, radio waves and light. The study displays that light from the sun consists of light energy superpositioned on low frequency TEM waves. The study describes methods enabling measurement of the low frequency plane TEM waves and the superpositioned energy.

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Formulation and Characterization of Ibuprofen Sustained Release Tablets by Solid Dispersion Technique

Formulation and Characterization of Ibuprofen Sustained Release Tablets by Solid Dispersion Technique

Syed Shariff Miyan et al., designed and development of fast dissolving tablets of Gliclazide by solid dispersions technique. The solubility of poorly soluble drug was enhanced by preparing solid dispersions of the drug with PEG 6000 in various concentrations. The optimized solid dispersions (Drug: PEG 6000 1:2 ratio) were further kneaded with suitable proportions of superdisintegrants such as; Crosscarmellose, Sodium starch glycolate and Crosspovidone. Fast dissolving tablets of Gliclazide was prepared by direct compression method. The pre-compressive parameters for the blends and post –compressive parameters for the prepared tablets were evaluated. Short term accelerated stability study was performed for optimized formulation and found no evidence of physical and chemical changes. FTIR study showed no evidence of drug-excipient interaction. The optimized formulation was found to be FDTG. It was concluded that fast dissolving tablets of Gliclazide can be prepared by solid dispersions of drug with PEG-6000 and combination of two superdisintegrants provide complete and better dissolution within in shorter period of time. 68

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