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Search Results: 1 - 10 of 806 matches for " Bansal AS "
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Insights on the structural characteristics of NDM-1: The journey so far  [PDF]
Avneet Saini, Rohit Bansal
Advances in Biological Chemistry (ABC) , 2012, DOI: 10.4236/abc.2012.24040
Abstract: New Delhi metallo-β-lactamase (NDM-1) has created a medical storm ever since it was first reported; as it is active on virtually all clinically used β-lactam antibiotics. NDM-1 rampancy worldwide is now considered a nightmare scenario, particularly due to its rapid dissemination. An underlying theme in the majority of recent studies is structural characterization as knowledge of the three-dimensional structure of NDM-1 shall help find connections between its structure and function. Moreover, structural details are even critical in order to reveal the resistance mecha- nism to β-lactam antibiotics. In this perspective, we review structural characteristics of NDM-1 that have been delineated since its first report. We anticipate that these structure-function connections made by its characterization shall further serve as future guidelines for elucidating pathways towards de novo design of functional inhibitors.
Determinants of IPOs Initial Return: Extreme Analysis of Indian Market  [PDF]
Rohit Bansal, Ashu Khanna
Journal of Financial Risk Management (JFRM) , 2012, DOI: 10.4236/jfrm.2012.14012
Abstract: This paper attempts to design and test empirical models, which integrate theoretical, institutional, and other factors, which interact to explain ownership structure. Ex-ante information at the level of under-pricing succeeds the Indian stock market crunch. The study is based on IPO that listed at Bombay stock exchange given that April 2000 to December 2011. Multiple linear regressions are used to distinguish the relationship between various independent variables with the dependent variable, i.e. level of underpricing. The outcomes of multiple regressions reveal that, firm’s age, IPO years, book building pricing mechanism, ownership structure, issue size, & market capitalization explained 44% of the variation in issuer under-pricing, Durbin Watson’s value subsisted 1.58, which indicates that, there is a positive sequential rela-tionship between variables. Number of share offered, issue size, market capitalization, subscription offer timing, book building mechanism and IPO years 2006, 2009 & 2011 are constructed to have important effect on the level of underpricing after the Indian market crisis. Nevertheless, firm’s age, IPOs year 2008, private issuing firms, non institutional promoters, Indian promoters and non institutional non promoters contain no significant difference in the level of underpricing after-market crisis.
Green remediation of tetracyclines in soil-water systems  [PDF]
Om Prakash Bansal
Health (Health) , 2013, DOI: 10.4236/health.2013.512276
Abstract:

The presence of tetracyclines in soil and surface water is an emerging concern. The present study was undertaken to investigate remediation of tetracylines (tetracycline (TC), oxytetracycline (OTC) and chlortetracycline (CTC)) from aqueous solution using vetiver grass, water lettuce, and sunflower and root exudates of water lettuce, sunflower and from soil by tomato, Indian mustard and carrot plant. The data of this study denote that vetiver grass, water lettuce, sunflower remedy tetracyclines from water. The remediation % after 63 days of treatment was 87-61 for TC; 88-68 for OTC and 87-68 for CTC. The remediation of tetracyclines at lower concentration of antibiotics in presence of root exudates of water lettuce and sunflower was more than 99% and remediation was faster than water lettuce or sunflower. The remediation of tetracyclines from aqueous solution may be due to oxidation of-OH group(s) of tetracycline through a process that is thought to involve reactive oxygen intermediates and/or role of peroxidase enzyme. The plant crops viz., tomato, Indian mustard and carrot can remedy 41%-72% of amended tetracyclines. The maximum bioaccumulation of TC and CTC was in Indian mustard and OTC was maximally bioaccumulated in tomato.

 

Weaver syndrome: A report of a rare genetic syndrome
Bansal Nitin,Bansal Amit
Indian Journal of Human Genetics , 2009,
Abstract:
Periodontal Emotional Stress Syndrome: Review of Basic Concepts, Mechanism and Management  [PDF]
Jyoti Bansal, Abhishek Bansal, Mohit Shahi, Suresh Kedige, Rachita Narula
Open Journal of Medical Psychology (OJMP) , 2014, DOI: 10.4236/ojmp.2014.33026
Abstract: Stress is an unavoidable consequence of life. It is described as adverse emotions or reactions to unpleasant experiences. Thus, stress can be viewed as a process with both psychological and physiological components. The possible mechanisms by which psychosocial factors act on periodontal tissues are oral hygiene negligence, changes in dietary intake, smoking, bruxism, gingival circulation, alteration in salivary component and flow, hormonal changes and lowered host resistance. During stress hypothalamic-pituitary-adrenal (HPA) axis and the sympathetic nervous system interact and release glucocorticoid which has myriad of effects that disrupt homeostasis and lead to increased susceptibility to periodontal diseases. The dental practioner, thus, may always decide to refer patients to appropriate professional for assistance and counselling. Therefore, reducing stress and improving coping strategies may improve the periodontal prognosis and treatment outcomes. The aim of this review is to provide an insight into the relationship between psychological stress and periodontal diseases.
Comparative Study of Different Space-Time Coding Schemes for MC-CDMA Systems  [PDF]
Lokesh Kumar Bansal, Aditya Trivedi
Int'l J. of Communications, Network and System Sciences (IJCNS) , 2010, DOI: 10.4236/ijcns.2010.34054
Abstract: In this paper, performance of space-time trellis-code (STTC), space-time block code (STBC), and space-time trellis-code concatenated with space-time block code (STTC-STBC) for multi-carrier code-division multiple-access (MC-CDMA) system are studied. These schemes are considered by employing different detection techniques with various multi input multi output (MIMO) antenna diversity for different number of states in multi-path fading channel. The corresponding bit error rate (BER) is obtained using simulation for minimum mean-square error (MMSE), maximum-ratio combining (MRC), and equal-gain combining (EGC) receivers employing Viterbi decoder. The simulation results show that the STTC-STBC MC-CDMA system perform better compared to other schemes considered in this paper using MMSE detection and it is also observed that the performance can also be enhanced by increasing diversity using more transmitter and receiver antennas. However, this improvement in performance comes at the cost of increased computational complexity, which is calculated for different transmitting and receiving antennas.
Recurrent Intestinal Obstruction Caused by Abdominal Cocoon  [PDF]
Rohit Bansal, D. P. Singh
Surgical Science (SS) , 2014, DOI: 10.4236/ss.2014.57051
Abstract:

Abdominal cocoon is a rare disease of the peritoneum and the rare cause of intestinal obstruction. The etiology of this disease is largely unknown. It primarily affects young adolescent females. We report a case of abdominal cocoon in a 16-year-old girl patient who presented with recurrent episodes of subacute intestinal obstruction.

Heterotopic Pancreas Presenting as Gastric Polyp  [PDF]
Devinder P. Singh, Rohit Bansal
Surgical Science (SS) , 2014, DOI: 10.4236/ss.2014.54024
Abstract:

Heterotopic pancreas is defined as pancreatic tissue found outside the usual anatomical location of the pancreas. It is often an incidental finding and can be found at different sites in the gastrointestinal tract. It may become clinically evident when complicated by pathological changes such as inflammation, bleeding, obstruction, and malignant transformation. We report an unusual case of a 25-year-old male patient with pain epigastrium caused by a polyp at the body of stomach along greater curvature revealed at endoscopy. Endoscopic biopsy was s/o inflammatory pathology. Wide excision of polyp was done and a histological diagnosis of heterotopic pancreas was established. The difficulty of making an accurate preoperative diagnosis is highlighted.

Fekete-Szeg? Problem for a New Class of Analytic Functions
Deepak Bansal
International Journal of Mathematics and Mathematical Sciences , 2011, DOI: 10.1155/2011/143096
Abstract: We consider the Fekete-Szeg? problem with complex parameter for the class ( ) of analytic functions. 1. Introduction and Preliminaries Let denote the class of functions of the form which are analytic in the open unit disk and denote the subclass of that are univalent in . A function in is said to be in class of starlike functions of order zero in , if for . Let denote the class of all functions that are convex. Further, is convex if and only if is star-like. A function is said to be close-to-convex with respect to a fixed star-like function if and only if for . Let denote of all such close-to-convex functions [1]. Fekete and Szeg? proved a noticeable result that the estimate holds for any normalized univalent function of the form (1.1) in the open unit disk and for . This inequality is sharp for each (see [2]). The coefficient functional on normalized analytic functions in the unit disk represents various geometric quantities, for example, when , , becomes , where denote the Schwarzian derivative of locally univalent functions in . In literature, there exists a large number of results about inequalities for corresponding to various subclasses of . The problem of maximising the absolute value of the functional is called the Fekete-Szeg? problem; see [2]. In [3], Koepf solved the Fekete-Szeg? problem for close-to-convex functions and the largest real number for which is maximised by the Koebe function is , and later in [4] (see also [5]), this result was generalized for functions that are close-to-convex of order . Let be an analytic function with positive real part on with , which maps the unit disk onto a star-like region with respect to 1 which is symmetric with respect to the real axis. Let be the class of functions in for which and be the class of functions in for which where denotes the subordination between analytic functions. These classes were introduced and studied by Ma and Minda [6]. They have obtained the Fekete-Szeg? inequality for the functions in the class . Motivated by the class in paper [7], we introduce the following class. Definition 1.1. Let , . A function is in th class , if where is defined the same as above. If we set in (1.6), we get which is again a new class. We list few particular cases of this class discussed in the literature for was discussed recently by Swaminathan [7]. The class for , where is considered in [8] (see also [9]). The class with was considered in [10] with reference to the univalencey of partial sums. whenever , the class considered in [11]. For geometric aspects of these classes, see the corresponding
The Effects of composts on adsorption-desorption of three carbamate pesticides in different soils of Aligarh district
OP Bansal
Journal of Applied Sciences and Environmental Management , 2010,
Abstract: The effects of various organic manure [farm yield manure (FYM), sewage sludge and poultry manure] application on adsorption-desorption of three carbamate pesticides [oxamyl(I);S-Ethyl-Nmethylcarbamoyl) oxy]thioacetimidate (II) and N-Phenyl (ethyl carbamoyl) propyl carbamate (III) on six soil samples of Aligarh district was studied. Addition of organic manure increased soil organic carbon content and electrical conductance while pH decreased. The results of the study denoted that adsorption isotherms were ‘L’ type and adsorption-desorption data conformed to Freundlich adsorption isotherm equation. The adsorption increased with the increase in organic manure and followed the order sewage sludge > FYM > poultry manure. The adsorptivity of soils was in order soil No. 1 > 2 > 3 > 4 > 5 > 6. The adsorption capacity was significantly positively correlated with soil organic carbon and CEC and negatively correlated with soil pH. Desorption was more in unamended soil than manure amended soil and decreased with the increase in amount of organic manure. Desorption showed hystersis, indicate by the higher adsorption slope (1/n ads) compared with desorption slope (1/n des). @JASEM J. Appl. Sci. Environ. Manage. December, 2010, Vol. 14 (4) 155 - 158
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