Crystal structure of 2-methylamino-3-nitro-4-p-tolylpyrano[3,2-c]chromen-5(4H)-one

The authors thank Dr Babu Varghese, SAIF, IIT, Chennai, India, for the data collection.Peer reviewedPublisher PD

Crystallization and preliminary X‐ray diffraction analysis of the Pax9 paired domain bound to a DC5 enhancer DNA element

Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/109357/1/S2053230X14017415.pd

Remediation of contaminated sites using hot gas injection

Remediation of contaminated subsurface sites at lower cost and time than currently used technologies are being demonstrated for a systems concept using new technology developed at the Hazardous Substance Management Research Center at New Jersey Institute of Technology. A technique for pneumatic fracture is employed to open subsurface passages to enhance vacuum extraction of contaminants. Economical and environmentally sound destruction of these contaminants is then accomplished using catalytic oxidation followed by scrubbing to remove air pollutants. The hot gas from this phase of the process is then injected into the subsurface formation after being used to preheat the fuel/air mixture to catalyst operating temperature, to increase contaminant temperature, hence vapor pressure leading to increased contaminant mass removal rates. A computer based model of the subsurface heating process has been developed to provide for engineering design. Using the heat injection well as the radial center for a cylindrical coordinate system, a non-steady state numerical heat transfer model is utilized to predict ground temperature in three dimensions assuming uniform gas flow along the fracture planes. Extension of the above model has been made to include contaminant mass removal. The change in rate of evaporation of chlorocarbon contaminants and low vapor pressure organic liquids in the vadose zone is related to the computed temperature increases. This connection allows assessment of the expected change in the measured mass removal rates of contaminants as a result of hot gas injection into the sub-surface. It was found that trichloroethylene (TCE) is removed from the surface of the formation cracks at gas temperatures of 635 °F and redeposits further downstream as the temperature drops to 60 °F. If the formation is heated for a sufficiently long time then the TCE would be transported to the extraction well. For accurate predictions of temperature distribution and mass removal rates, the model must be calibrated on the actual site of the clean-up

Amalgamation based optical and colorimetric sensing of mercury (II) ions with silver@graphene oxide nanocomposite materials

The article describes a facile method for the preparation of a conjugate composed of silver nanoparticles and graphene oxide (Ag@GO) via chemical reduction of silver precursors in the presence of graphene oxide (GO) while sonicating the solution. The Ag@GO was characterized by X-ray photoelectron spectroscopy, X-ray powder diffraction, and energy-dispersive X-ray spectroscopy. The nanocomposite undergoes a color change from yellow to colorless in presence of Hg(II), and this effect is based on the disappearance of the localized surface plasmon resonance absorption of the AgNPs due to the formation of silver-mercury amalgam. The presence of GO, on the other hand, prevents the agglomeration of the AgNPs and enhances the stability of the nanocomposite material in solution. Hence, the probe represents a viable optical probe for the determination of mercury(II) ions in that it can be used to visually detect Hg(II) concentrations as low as 100 μM. The instrumental LOD is 338 nM

IRRIGATION DEVELOPMENT AND IMPROVEMENT OF GRAND ANICUT UNDER THE SIR ARTHUR COTTON

Even before India went under the colonial rule of the British, while the East India Company continued to administer the territories in their command, they realised that the restoration and improvements to the existing irrigation works should get the first priority in the civilian rule to keep the farming community in good humor and assist in maintaining food production, incidentally improving their revenue. As early as 1809, engineers under designation of "Superintendents of Tank repairs" were appointed and asked to aid the Collectors. This shows that the minor irrigation tanks occupied prime place among the public works at the time. By 1825, the post of "The Inspector General of Chill Estimates" was created to function in the headquarters under the Board of Revenue and supervise the work of the 'Superintendents of tank Repairs' in the districts. The contribution made by the most illustrious irrigation engineer of the times, Sir Arthur Cotton, has been immense. Ever since he entered service in 1822 as an Assistant to the 'Superintendent of Tank Repairs' he plunged himself heart and soul for the continued development of irrigation benefits to this part of the country. The one ambition he had closest to his heart was to create large reservoirs, dig up a net-work of canals all over on the Indian continent and make them all irrigation cum navigation canals so that the farmers could be offered cheap mode of water transport for marketing their produce. Godavari river was to be the scene of his most toilsome labour and his grandest success was in the planning and construction of the Dowleshwaram ani cut across this majestic river in record time during 184 7 to 1852 and transform the delta into a prosperous tract with numerous canals and distributaries navigable as well. He drew great appreciation from the Governor in Council and the Court of Directors of the East India Company in England. More than that he has left behind a name and fame and is being remembered with great reverence and deified by the local populace to this day. His handling of the Cauvery irrigation was superb. The Celerons arm was scouring itself deeper and the Cauvery was getting silted up

3D Printing Support-less Engineered Lattice Structures via Jetting of Molten Aluminum Droplets

Magnetohydrodynamic (MHD) metal jetting is a novel additive manufacturing method where parts can be manufactured by precisely depositing molten metal droplets. This thesis work explores the possibility of using such a method to print engineered lattice structures without the aid of any support material. It was determined through experiments that by carefully controlling the droplet jetting frequency, the droplet step-over distance, and the stand-off distance between the print head and the substrate, pillars with varying angles to the substrate could be printed. Also presented is the parameter study which maps droplets jetting frequency, and droplet step-over distance with the angle of the printed strut. The experiments discussed here were conducted using 4043 Aluminum and the approach can be considered as a generalization that could be extended to any metal that can be jetted using the Magnetohydrodynamic jetting process

Optimization of impact behavior of bio particulated coir-vinyl ester composites using simulated annealing with post analysis

The present investigation is focused on evaluation and optimization of impact behavior of bio particulated coir-vinyl ester composites. The bio particles such as groundnut shell, alumina and termite mound soil have been selected and their influences on the impact behavior of coir -vinyl ester composites are evaluated. The bio particulated composite fabrications are planned as per full factorial design with the different levels of fibre length, fibre content and particulate content. The impact strength of fabricated composites is evaluated. The nonlinear regression models are developed for the prediction of impact behaviors over the specified range of conditions. The fabrication parameters for the maximum value of impact behaviors are also determined using simulated annealing algorithm and conformance checking is carried out using post analysis. The optimum values of impact behaviors of 39.5, 45.9 and 52.1 kJ/m2 are obtained in coir-vinyl ester composites reinforced with groundnut shell, alumina and termite mound soil respectively.

A SCIENTOMETRIC STUDY OF INDIAN JOURNAL OF CHEMICAL TECHNOLOGY

The present study examines the six hundred and forty six research paper published in the Indian Journal of Chemical Technology during the years from 2008 to 2017. The main objective of the paper is to examine the publication trends in the field of chemical engineering and technology. The result of study indicates that on an average of 64.6 papers published per year during the study periods. The majority of the contributions were made by multiple authors. More than seventy five percent of the contributors belong to India. An average number of references appended per research paper are 28.93

A SCIENTOMETRIC STUDY OF INDIAN JOURNAL OF CHEMICAL TECHNOLOGY

The present study examines the six hundred and forty six research paper published in the Indian Journal of Chemical Technology during the years from 2008 to 2017. The main objective of the paper is to examine the publication trends in the field of chemical engineering and technology. The result of study indicates that on an average of 64.6 papers published per year during the study periods. The majority of the contributions were made by multiple authors. More than seventy five percent of the contributors belong to India. An average number of references appended per research paper are 28.93

A Case of Isolated Axillary Tuberculous Lymphadenitis

Tuberculosis (TB) is one of the communicable diseases with high morbidity to the patient. TB is divided into pulmonary and  extrapulmonary TB. In extrapulmonary TB, isolated axillary TB is rare and sometimes creates diagnostic difficulty, particularly in female patients. The axillary lymph nodes are affected in around 3% of tuberculous lymphadenitis. Our case presented with isolated axillary tuberculous lymphadenitis which is rare without evidence of TB elsewhere in the body. It is more common in females compared to males, and it commonly involves the left side. Most of the cases do not show systemic manifestations. Chest X‑ray and ultrasound are useful primary investigations for the diagnosis. Histopathological examination of the lymph node is the confirmatory test for axillary tuberculous adenitis. Hence, tuberculous lymphadenopathy should be considered one of the differential diagnoses in a female patient with isolated axillary lymphadenopathy even without clinical manifestations of TB. Keywords: Axillary calcification, axillary tuberculous, lymphadenitis, macrocalcificatio