Jadavpur University

About: Jadavpur University is a education organization based out in Kolkata, India. It is known for research contribution in the topics: Population & Fuzzy logic. The organization has 10856 authors who have published 27678 publications receiving 422069 citations. The organization is also known as: JU & Jadabpur University.

Nonionic surfactant vesicles (niosomes) of cytarabine hydrochloride for effective treatment of leukemias: encapsulation, storage, and in vitro release.

Abstract: Niosome vesicles of cytarabine hydrochloride were prepared by a lipid hydration method that excluded dicetylphosphate. The sizes of the vesicles obtained ranged from 600 to 1000 nm, with the objective of producing more blood levels in vivo. The study of the release of drug from niosomes exhibited a prolonged release profile as studied over a period of 16 hr. The drug entrapment efficiency was about 80% with Tween 80, Span 60 and Tween 20; for Span 80, it was 67.5%. The physical stability profile of vesicular suspension was good as studied over a period of 4 weeks.

Effect of Mn doping on the optical and structural properties of ZnO nano/micro-fibrous thin film synthesized by sol-gel technique

Abstract: Zn1−xMnxO sub-micron fibrous thin films were synthesized by a simple sol–gel dip-coating technique. XRD pattern confirmed the hexagonal wurtzite structure of the synthesized material. Expansion of the c-axis lattice parameter has been observed with the increase of manganese content in the films. Manganese content (x) in the films varied from 0.0098–0.0568 and was determined by energy-dispersive X-ray analysis. The average diameter of the ZnO fibers were ∼700 nm whereas the length was several hundred micro-meters and hence the aspect ratio was quite large (>150). Branching and uneven growth occurred with the increase of manganese content as is evident from SEM analysis. Optical transmittance spectra showed absorption band due to characteristic d–d transition of Mn2+ ions nearly at 3 eV. The band gap, as determined from the transmittance spectra, decreased to 3.28 eV for x = 0.0287 and then increased upto 3.38 eV for x = 0.0568 as compared with the undoped film for which the band gap is 3.31 eV. Photoluminescence spectra of Zn1−xMnxO fibrous thin films on glass substrate for different doping levels were also studied which showed a broad UV band at ∼397 nm, a narrow blue–green band at ∼466 nm and another broad peak at ∼526 nm. Mn doping causes a large reduction in the intensity of the UV emission and small reduction in green emission intensity of the PL spectra.

A Compact UWB Bandpass Filter With Embedded SIR as Band Notch Structure

Abstract: In this letter, an ultrawideband (UWB) bandpass filter with a band notch is proposed. The UWB BPF (3.1-10.6 GHz) is realized by cascading a distributed high-pass filter and an elliptic low-pass filter with an embedded stepped impedance resonator (SIR) to achieve a band notch characteristic. The notch band is obtained at 5.22 GHz. It is shown that the notch frequency can be tuned by changing the impedance ratio of the embedded SIR. A fabricated prototype of the proposed UWB bandpass filter is developed. The inband and out-of-band performance obtained by measurement, EM simulation, and that with an equivalent circuit model are in good agreement.