Time filter

Source Type

Kalyān, India

Gupta A.D.,Birla College | Karthikeyan S.,Dr Ambedkar Government Arts College
Ecotoxicology and Environmental Safety | Year: 2016

Ni and Cr are ubiquitous pollutants in the aquatic environments. These heavy metals elicit toxicities to aquatic organisms including microbes. In this study, interaction of the two heavy metals on the toxicity in Escherichia coli (E. coli) was studied using FTIR spectroscopy. The binding of Ni(II) to E. coli was stronger than that for Cr(VI). Cr exhibited antagonistic effects in the presence of Ni in E. coli. FTIR analysis showed a decrease in lipid content in the presence of Ni and not for Cr. Further, a decrease in band area was observed in the region of 3000–2800 cm−1 and at ~1455 cm−1 due to a decrease in fatty acids and lipid molecules. The band area ratio of lipid was used to monitor the changes in fatty acids due to metal toxicity. Principle component method helps to discriminates the results between control and metal toxicities in E. coli from the FTIR data. The study shows the importance of metal interaction and its toxicity on E. coli. © 2016 Elsevier Inc.

Shrivastava A.,Naval Materials Research Laboratory | Khandpekar M.,Birla College | Gowtam D.S.,Naval Materials Research Laboratory | Deshmukh V.P.,Naval Materials Research Laboratory
Advanced Science Letters | Year: 2015

Radial distribution functions are useful because they have a simple intuitive understanding and can be obtained both experimentally as well as from computer generated structure models. In present work we have carried out molecular dynamics (MD) simulations on Fe100-X ZrX (X = 5, 10), to understand the inherent structure of the system by means of radial distribution function (RDF). RDFs were calculated for all temperature range and their variation with respect to temperature reveals the structural features the alloy system. © 2015 American Scientific Publishers. All rights reserved.

Khandpekar M.M.,University of Mumbai | Dongare S.S.,University of Mumbai | Satpute P.P.,Birla College | Pati S.P.,Sambalpur University
Optics Communications | Year: 2011

Transparent crystals of α-glycine with barium nitrate and calcium nitrate (GBC) have been grown from aqueous solution by slow evaporation technique at room temperature. Crystals of size 22 × 25 × 4 mm 3 have been obtained in 3-4 weeks time. The solubility of GBC has been determined in water. The grown crystal belongs to orthorhombic system with cell parameters a = 12.7321 A.U, b = 13.7752 A.U and c = 8.6002 A.U with unit cell volume of 1508.36 (A.U)3. Comparative IR and Raman studies indicate a molecule with a lack of center of symmetry. A wide transparency window useful for optoelectronic applications is indicated by the UV Studies. Using Nd:YAG laser (1064 nm), the optical second harmonic generation (SHG) conversion efficiency of GBC is found to be 0.702 times than that of standard KDP. On exposure to light the GBC crystals exhibit positive photoconductivity. I-V characteristics, dielectrics studies, electrical and Vickers micro hardness measurement have been carried out. The GBC crystal exhibits more mechanical strength compared to the reported GSN crystals. © 2011 Elsevier B.V.

Patil A.,Birla College | Patil D.,Smt Chm College | Ansari A.,Birla College | Koli S.,Birla College
Indian Journal of Traditional Knowledge | Year: 2013

To obtain effective drug with proven efficacy, it is necessary to establish standards through modern scientific and technical procedures which would certainly enhance the reputation and acceptance of traditional medicines. Sufoof-e-mohazzil, a unani polyherbal formulation is used by Unani physicians for treatment of obesity. The present work involves standardization of Sufoof-e-mohazzil in order to assess the quality of In-house and marketed formulations. In-house and marketed formulations were subjected to pharmacognostic studies, physico-chemical properties, phytochemical analysis and HPTLC fingerprint profile to set the standards, which can be used as reference standard to evaluate the quality control in herbal industries and to overcome batch to batch variations in traditional preparation. In the present study, the anatomical markers fibro vascular tissue, endospermic cells, vittae, pitted vessels and group of sclereids from the mesocarp were observed. The extractive values were found to be more for alcohol than water. The preliminary phytochemical analysis indicated presence of alkaloids, fats and fixed oils, essential oils, glycosides, resins and saponins. HPTLC fingerprint profile of formulations showed a characteristic pinkish red band of Thymol at Rf of 0.43.

Shah W.,Vartak College | Patil U.,Birla College | Sharma A.,Birla College
Der Pharma Chemica | Year: 2014

In the present work silver nanoparticles was synthesized from stem bark extract of Terminalia tomentosa Roxb. (Wight & Arn.), a plant widely found in a large region in India, as reducing agent. Terminalia tomentosa Roxb. (Wight & Arn.) is known to be rich in antioxidant molecules which was used as reducing agents. Silver nanoparticles grow in a single-step method, at room temperature, and with no addition of external energy. The nanoparticles have been characterized by ultraviolet-visible spectroscopy and transmission electron microscopy, as a function of the ratio of silver ions to reducing agent molecules. The nanoparticles diameters were found to be in the range of 5 to 50 nm. The synthesized silver nanoparticles from the Terminalia tomentosa Roxb. (Wight & Arn.) stem bark extract, which do not involve any harmful chemicals were well-dispersed.

Discover hidden collaborations