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Search Results: 1 - 10 of 377 matches for " Niharika Chawla "
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De novo sequencing and characterization of Picrorhiza kurrooa transcriptome at two temperatures showed major transcriptome adjustments
Parul Gahlan, Heikham Singh, Ravi Shankar, Niharika Sharma, Anita Kumari, Vandna Chawla, Paramvir Ahuja, Sanjay Kumar
BMC Genomics , 2012, DOI: 10.1186/1471-2164-13-126
Abstract: Using paired-end (PE) Illumina sequencing technology, a total of 20,593,412 and 44,229,272 PE reads were obtained after quality filtering for 15°C and 25°C, respectively. Available (e.g., De-Bruijn/Eulerian graph) and in-house developed bioinformatics tools were used for assembly and annotation of transcriptome. A total of 74,336 assembled transcript sequences were obtained, with an average coverage of 76.6 and average length of 439.5. Guanine-cytosine (GC) content was observed to be 44.6%, while the transcriptome exhibited abundance of trinucleotide simple sequence repeat (SSR; 45.63%) markers.Large scale expression profiling through "read per exon kilobase per million (RPKM)", showed changes in several biological processes and metabolic pathways including cytochrome P450s (CYPs), UDP-glycosyltransferases (UGTs) and those associated with picrosides biosynthesis. RPKM data were validated by reverse transcriptase-polymerase chain reaction using a set of 19 genes, wherein 11 genes behaved in accordance with the two expression methods.Study generated transcriptome of P. kurrooa at two different temperatures. Large scale expression profiling through RPKM showed major transcriptome changes in response to temperature reflecting alterations in major biological processes and metabolic pathways, and provided insight of GC content and SSR markers. Analysis also identified putative CYPs and UGTs that could help in discovering the hitherto unknown genes associated with picrosides biosynthesis.Picrorhiza kurrooa Royle ex Benth. is a medicinally important endangered plant species of family Scrophulariaceae. The species is distributed between 3,000-5,000 m above mean sea level in the Himalayan region [1]. P. kurrooa is widely used in traditional as well as modern system of medicine for the treatment of liver disorders, fever, asthma and jaundice [2,3]. Indiscriminate and extensive harvesting and lack of organized cultivation has threatened the status of this plant in nature and is
Characterization of two antimicrobial peptides produced by a halotolerant Bacillus subtilis strain SK.DU.4 isolated from a rhizosphere soil sample
Piyush Baindara, Santi M Mandal, Niharika Chawla, Pradip Kumar Singh, Anil Kumar Pinnaka and Suresh Korpole
AMB Express , 2013, DOI: 10.1186/2191-0855-3-2
Abstract: A bacterial strain producing two antimicrobial peptides was isolated from a rhizosphere soil sample and identified as Bacillus subtilis based on both phenotypic and 16S rRNA gene sequence phylogenetic analysis. It grew optimally up to 14% NaCl and produced antimicrobial peptide within 24 h of growth. The peptides were purified using a combination of chemical extraction and chromatographic techniques. The MALDI-TOF analysis of HPLC purified fractions revealed that the strain SK.DU.4 secreted a bacteriocin-like peptide with molecular mass of 5323.9 Da and a surface-active lipopeptide (m/z 1056 Da). The peptide mass fingerprinting of low-molecular-weight bacteriocin exhibited significant similarity with stretches of secreted lipoprotein of Methylomicrobium album BG8 and displayed 70% sequence coverage. MALDI MS/MS analysis elucidated the lipopeptide as a cyclic lipopeptide with a β-hydroxy fatty acid linked to Ser of a peptide with seven α-amino acids (Asp-Tyr-Asn-Gln-Pro-Asn-Ser) and assigned it to iturin-like group of antimicrobial biosurfactants. However, it differed in amino acid composition with other members of the iturin family. Both peptides were active against Gram-positive bacteria, suggesting that they had an additive effect.
Status of the Upsilon Polarization Measurement at CDF
Niharika Ranjan
Physics , 2011,
Abstract: The angular distributions of Upsilon(1S) to mu+ mu- decays are analyzed using a sample of Upsilon(1S) mesons in 2.9 fb^{-1} of data collected at sqrt{s} = 1.96TeV. The results of the one-dimensional angular analysis suggest that Upsilon(1S) may be longitudinal polarized at high transverse momentum. This observation is largely inconsistent with NRQCD prediction that predicts transverse polarization at high p_T.
Change in Internal Energy and Enthalpy of Spinning Black Hole with Half Spin Parameter in XRBs  [PDF]
Dipo Mahto, Amresh Kumar Singh, Niharika Kumari
International Journal of Astronomy and Astrophysics (IJAA) , 2016, DOI: 10.4236/ijaa.2016.63027
Abstract: Mahto et al. gave an expression for the change in enthalpy and internal energy with corresponding change in the radius of the event horizon of black holes of spin parameter a* = 1 (2013). On the basis of this research work, we have proposed an expression for the change in the internal energy and enthalpy of the spinning black holes to assume spin parameter a* = 1/2 and calculated their values for different test spinning black holes existing in XRBs.
Mechanical Properties of Epoxy Resin – Fly Ash Composite  [PDF]
Manoj Singla, Vikas Chawla
Journal of Minerals and Materials Characterization and Engineering (JMMCE) , 2010, DOI: 10.4236/jmmce.2010.93017
Abstract: There has been significant increase in use of glass fibre reinforced composites as structural materials in naval mine countermeasure surface ships. Sea mines when detonated emit underwater shock waves, which could impart severe loading to naval ship structure; there are attempts to model the response of a ship structure to this loading. For the model to be accurate & useful material property data determined experimentally by taking different weight percentage of glass fibers (E-300, mat form) with epoxy resin & comparison with fly ash reinforced composite. Specimens in the form of cube of size 10X10X10 (mm’s) are used & results are presented. Fracture behaviour of composite can also be studied using SEM. SEM analysis is done to observe distribution of fly ash particles in matrix, resin fly ash interface, glass fibre matrix interface, glass fibre distribution etc,.
Impact of Nutritional Counselling on Nutritional Status of Postmenopausal Women  [PDF]
Gurpreet Kaur, Paramjit Chawla
Food and Nutrition Sciences (FNS) , 2015, DOI: 10.4236/fns.2015.64044
Abstract: The aim of the study was to assess the impact of nutrition counselling on food intake and anthropometric measurements in postmenopausal women. Sixty postmenopausal women were selected from two villages of Sangrur district and were divided into two groups—Group I (Control) and Group II (Experimental) containing 30 subjects each. Subjects of Group II were imparted nutrition counselling (NC) regarding benefits of Aloe vera and its use in diet in individual and group contacts once in a week, for a period of three months. Aloe vera plants were also distributed to be used in their diets. Dietary intake of subjects for 3 consecutive days by 24 hr recall method was recorded before and after nutrition counselling. The average daily nutrient intake of diets was calculated by using Diet Cal. Anthropometric parameters were calculated before and after counselling. Dietary survey revealed that intake of cereals, fats/oil and sugar/jaggery decreased significantly (p ≤ 0.05) whereas intake of green leafy vegetable, other vegetables and fruits increase significantly (p ≤ 0.01) after counselling. A significant decrease in energy, carbohydrate, fat and significant increase intake in iron, calcium, potassium, Vitamin C and β-carotene content was observed. A significant reduction was observed for weight, body mass index (BMI), mid upper arm circumference (MUAC), triceps skinfold thickness (TSFT) and waist hip ratio (WHR) by 4.9%, 3.98%, 2.9% and 2.17% respectively, while random blood sugar (RBS), systolic blood pressure (SBP) and diastolic blood pressure (DBP) decreased by 25.21%, 13.74% and 8.03% after counselling. After nutrition counselling subjects adopted good nutritional practices and use of Aloe vera leaves in diets which improved their health status of postmenopausal women.
Advanced Speech Compression VIA Voice Excited Linear Predictive Coding Using Discrete Cosine Transform (DCT)
Nikhil Sharma,,Niharika Mehta
International Journal of Innovative Technology and Exploring Engineering , 2013,
Abstract: One of the most powerful speech analysis techniques is the method of linear predictive analysis. This method has become the predominant technique for representing speech for low bit rate transmission or storage. The importance of this method lies both in its ability to provide extremely accurate estimates of the speech parameters and in its relative speed of computation. The basic idea behind linear predictive analysis is that the speech sample can be approximated as a linear combination of past samples. The linear predictor model provides a robust, reliable and accurate method for estimating parameters that characterize the linear, time varying system. In this project, we implement a voice excited LPC vocoder for low bit rate speech compression.
Indigenous Nutritious Medicine For Andropause
M. Niharika And A. Jyothi
Golden Research Thoughts , 2013, DOI: 10.9780/22315063
Abstract: The andropause is the time in a man's life when the hormones naturally start decline usually during theirlate forties or early fifties. Andropause is a medical condition caused by low testosterone levels in men. Andropausein men is similar to menopause in women. Andropause symptoms such as depression, night sweats, hot flashes,fatigue, osteoporosis, low libido, poor concentration and loss of memory.Foods that boost testosterone provide a natural way to recharge libido function, muscle mass and increaseenergy levels. Natural testosterone foods act natural libido enhancers.Zinc is the most important mineral for menzinc is extremely effective at raising testosterone levels.A diet rich in vitamin and E ability to increase testosteroneproduction.Vegetables that include spinach, carrot, tomato, sweat potato, and Herbs that include Garlic, pepper,mustard seeds and peanuts. Hence these are all vegetables and herbs include in a diet to prepare a spicy mix toprevent andropausal symptoms. Significantly high level of testosterone was observed in prepared product
A survey on the approaches in honeypot for implementing network security
Niharika Srivastava,Ved Prakash
International Journal on Computer Science and Engineering , 2012,
Abstract: Honeypot is a supplemented active defence system for network security. It traps attacks, records intrusion information about tools and activities of the hacking process, and prevents attacks outbound the compromised system. Integrated with other security solutions, honeypot can solve many traditional dilemmas. It has emerged as a prominent technology that helps learn new hacking techniques fromattackers and intruders. Honeypots can initiatively lure hackers to attack the internet, take the record of the ways and means of their invasion, and then analyze and study them. This paper discusses the client and server honeypot approaches for the implementation of network security.
Online Social Media and Police in India: Behavior, Perceptions, Challenges
Niharika Sachdeva,Ponnurangam Kumaraguru
Computer Science , 2014,
Abstract: Police agencies across the globe are increasingly using Online Social Media (OSM) to acquire intelligence and connect with citizens. Developed nations have well thought of strategies to use OSM for policing. However, developing nations like India are exploring and evolving OSM as a policing solution. India, in recent years, experienced many events where rumors and fake content on OSM instigated communal violence. In contrast to traditional media (e.g. television and print media) used by Indian police departments, OSM offers velocity, variety, veracity and large volume of information. These introduce new challenges for police like platforms selection, secure usage strategy, developing trust, handling offensive comments, and security / privacy implication of information shared through OSM. Success of police initiatives on OSM to maintain law and order depends both on their understanding of OSM and citizen's acceptance / participation on these platforms. This study provides multidimensional understanding of behavior, perceptions, interactions, and expectation regarding policing through OSM. First, we examined recent updates from four different police pages- Delhi, Bangalore, Uttar Pradesh and Chennai to comprehend various dimensions of police interaction with citizens on OSM. Second, we conducted 20 interviews with IPS officers (Indian Police Service) and 17 interviews with citizens to understand decision rationales and expectation gaps between two stakeholders (police and citizens); this was followed up with 445 policemen surveys and 204 citizen surveys. We also present differences between police expectations of Indian and police departments in developed countries.
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