Articles

GC-MS, FTIR, and HPLC analysis of Trichoderma sps, Rhizopus sps, and Aspergillus sps of Saraca asoca for anticancer molecules

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Endophytic fungi combined with medicinal plants are reservoirs of therapeutic compounds. These endophytes are considered one of the major sources of bioactive molecules used in different aspects of health care. The present study attempted to assess the possibility of using the endophytic extract. The study showed a complete endophytic extract by using the GC–MS profile, indicating the presence of different volatile molecules in the endophytic extract. The HPLC fingerprint of S. asoca endophytic extract represents the characteristic markers of this herb. The endophytic extract’s HPLC showed caffeine, a Ret Time [min]- 3.052, and a Width [min]- 0.1322. The FTIR analysis of the functional groups present in the Trichoderma sps are =C-H (Alkynes, Amides), O-H (Carboxylic acids), C=C(Alkynes), C=C (Aromatic compounds), C-F (Alkyl and Aryl Halides). These functional groups are used in the production of antibiotics and antifungal drugs. The GC-MS study of the endophytic extract showed the presence of 59 compounds, which possessed anticancer properties. The anticancer activity was studied further.

Synthesis of PVA/TiO2 Composite Layer over Conductive Textile Sheet Using Electrospinning Method for Enhancing Self-Cleaning Properties

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The present research used the electrospinning method to apply a polyvinyl alcohol/titanium dioxide (PVA/TiO2) layer over a conductive textile (70 % polyester and 30 % cotton) sheet. PVA with 10, 12.5, and 15 g concentrations was mixed into 100 ml distilled water. Then, each PVA solution was mixed with 1.5 wt.% of TiO2. Afterward, the electrospinning method applied a PVA/TiO2 composite onto a conductive textile sheet. Various characterizations were conducted, such as resistivity, scanning electron microscopy (SEM), Fourier transforming infrared (FTIR), and photocatalytic activity. The resistivity result is 9.5, 10, and 10  for A, B, and C samples. According to SEM investigation, higher PVA concentration leads to higher fiber sizes around 0.65 µm. An increase in PVA content does not affect the bands that were formed. The size of the fiber diameter contributed to the photocatalytic activity of MB. A smaller fiber diameter could enhance photocatalytic activity.

Effect of Molar Ratio on Structure of PPy-PVA Composite Film

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A chemical oxidation method is used to synthesize pyrrole with ferric chloride as oxidant to prepare polypyrrole. Multiple chemical oxidations were carried out using various molar ratios. A stock solution of PolyVinyl Alcohol was produced to form composites of polymers. The PPy-PVA composites were achieved with the help of solution casting method to obtained free standing films. These composites films were characterized using SEM, FTIR and XRD techniques. The result of SEM, FTIR, and XRD reveals that the surface morphology varies as per the molar ratio. Along with the surface morphology molar ratio the conductivity of composite films was studied in the temperature range 303 K-343 K using two probe conductivity method. It has been observed that molar ratio also plays an important role in the conductivity of composite films.

Study on Comparative Analysis of Polymerization of Pyrrole Using Electrochemical Method and UV Photo Irradiation

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Polymerization of pyrrole using various methods like pyrrole using electrochemical method and UV Photo irradiation has been investigated. Fourier transform infrared spectroscopy (FTIR), Scanning electron microscopy (SEM), X-ray diffraction (XRD) techniques were used to study the internal structure, material morphology, chemical nature of conducting polymers. The temperature dependence of the electrical conductivity of the Polypyrrole, Their behavior resemble the metallic conductors.