A study of angular momentum loss in binaries using the free Lagrange method

The evolution of a binary star system depends greatly on the angular momentum losses in the system brought about by gravitational radiation and mass outflow (e.g., evaporating winds and magnetic braking) from the secondary component of the binary. Using a three-dimensional hydrodynamic fluid code based on the free Lagrange method, we study the loss of specific angular momentum from a binary system due to an evaporative wind from the companion of a millisecond pulsar. We consider binaries of different mass ratios and winds of different initial velocities and in particular attempt to model the system PSR 1957+20. We are in the process of incorporating the effect of the radiation force from the pulsar and the magnetic field of the companion on the mass outflow. The latter effect would also enable us to study magnetic braking in cataclysmic variables and low-mass X-ray binaries

Range safety signal propagation through the SRM exhaust plume of the space shuttle

Theoretical predictions of plume interference for the space shuttle range safety system by solid rocket booster exhaust plumes are reported. The signal propagation was calculated using a split operator technique based upon the Fresnel-Kirchoff integral, using fast Fourier transforms to evaluate the convolution and treating the plume as a series of absorbing and phase-changing screens. Talanov's lens transformation was applied to reduce aliasing problems caused by ray divergence

Some hematological and biochemical parameters in smokeless tobacco (Jharda) chewers

The effect of Jharda powder (smokeless tobacco) on some hematological and biochemical parameters in consumers was investigated. Hematological parameters including hemoglobin content and white blood cell and leukocyte counts were higher in jharda powder consumers, while monocytes and basophiles counts were lower. Higher biochemical parameters like serum cholesterol, glucose and protein were observed in blood samples of Jharda consumers

Molecular characterization of traditional mango germplasm of coastal Andhra Pradesh using RAPD markers

A study was conducted at Horticultural research station, Venkataramannagudem for evaluating the variability of mango germplasm to conserve the elite ones and to identify the superior genotypes using molecular markers for future crop improvement. Genetic variation and relationship among 34 traditional mango germplasm were analyzed using Random Amplified Polymorphic DNA (RAPD) markers. Fifteen out of the twenty primers screened were informative and 177 amplified DNA bands with sizes ranging from 100 - 5000 bp were selected as RAPD markers. The number of amplified fragments varied from 3 (OPG 13) to 20 (OPX 04) with an average of 11.8 polymorphic fragments per marker. Specific RAPD markers for some mango germplasm were identified. Unweighted Pair Group Method using Arithmetic means (UPGMA) cluster analysis grouped all the germplasm into two clusters with a genetic similarity coefficient range of 0.67 to 0.88. The accessions within the germplasm i.e., Banganapalli -1, Banganapalli -2 and Banginapalli-3 showed genetic similarity which is in good agreement from a single ancestor with their putative pedigrees. The genotypes Panukula Mamidi and Rajamamidi were closely clustered since these two genotypes are native to the Vizianagaram district. Similarly, the genotypes Nuzividu Tiyya Mamidi and Nuzividu Rasalu occurred in the same cluster indicated that these genotypes also originated from the same geographical area, it can be concluded that they were separated into the cluster based on geographic origin. This study showed clearly that germplasm from coastal Andhra Pradesh unveiled maximum diversity and indicated the potential of RAPD markers for the identification of mango germplasm for breeding purposes

Nutrient effects on production of cellulolytic enzymes by Aspergillus niger

The production of cellulase (filter paper activity, endoglucanase and )-glucosidase) by Aspergillus niger on three media in liquid shake culture was compared. The culture filtrate of this organism exhibited relatively highest activity of all three enzymes and extracellular protein content at 7-day interval during the course of its growth on Czapek-Dox medium supplemented with 1.0% (w/v) cellulose. Urea as a nitrogen source and pH 5.0 were found to be optimal for growth and cellulase production by A.niger. Among various soluble organic carbon sources and lignocelluloses tested in this study, carboxymethylcellulose and sawdust at 1% supported maximum production of all three enzymes by A.niger.Keywords: Aspergillus niger, cellulase activity, nutrients, 6-glucosidas

Identification of lunar volcanic tubes, a potential site for human settlement using 3D Chandrayaan-1 TMC data

This article does not have an abstract

Protective effect of Acampe praemorsa (Roxb.) Blatt. & McCann against oxidative stress

The current study was carried to make available phytochemical information and evaluation of antioxidant activity of Acampe praemorsa (Roxb.) Blatt. & McCann. The phytochemical analysis was carried out using procedures and quantified phenolic and alkaloid contents. The antioxidant activity was evaluated by in-vitro and in-vivo studies. The In-vitro antioxidant activity was carried on free radicals such as superoxide, hydroxyl DPPH, hydrogen peroxide, evaluation of reducing power. In-vivo study was carried on albino Wistar rats with different doses of extracts. The results provide that, A. praemorsa extracts have diversified phytochemicals in extracts like steroids, alkaloids, phenolics, glycosides, oils, quinones, tannins etc. The hydroalcoholic extract has more phenolic (26.80±0.51) and alkaloid (20.59±0.22) contents. The antioxidant activity results provide information that the extracts possess concentration dependent activity on tested free radicals. The hydroalcoholic extract has more protective nature against superoxide, DPPH, H2O2 free radicals and reducing power but ethyl acetate extract has more potential against hydroxyl free radical than hydroalcoholic extract. The extracts were found to be safe on toxic studies and In-vivo study results and they play significant role in controlling the oxidative enzymes such as catalase, superoxide dismutase, lipid peroxidation (malonaldehyde) in the body. Thus, it was determined that A. praemorsa have potential bioactive compounds and antioxidant activity

Carcinoma or Sarcoma of the Breast

Carcinosarcomas comprise less than 1% of invasive carcinomas of the breast. They are a heterogeneous group of malignant tumors in which part or all of the carcinomatous epithelium is transformed into a nonglandular component by metaplastic growth process. We report a case of carcinosarcoma of breast. She was a 62-year-old female who presented with complaint of pain and lump in left breast of 6 months duration. There was a discharging ulcer measuring 4 ×6 cm over the nipple of 1-month duration. Computed tomography of chest and positron emission tomography report was suggestive of carcinoma of left breast with left axillary lymphadenopathy and lung metastasis. Histopathology of the tumor was reported as infiltrating duct cell carcinoma (IDC) with angiosarcoma. The IDC was estrogen and progesterone receptor negative and Human Epidermal Growth Factor -2 receptor positive. The angiosarcoma was positive for vimentin, vascular endothelial growth factor, CD34, and CD31. The Ki-67 labeling index was 60% and the epidermal growth factor receptor was positive. This is a case of carcinosarcoma of breast adding to the existing literature.Keywords: Breast, carcinosarcoma, metaplastic carcinom