Histopathological study of non-neoplastic lesions of nose, paransal sinuses and nasopharynx

Background: The various lesions of the nose, paranasal sinuses and nasopharynx were subjected to histopathological evaluation over a period of 5 years (2010 to 2015) at the Department of Pathology, in a rural based hospital. Total 84 specimens were studied over the time of 5 years. Methodology: The formalin fixed specimens were received with complete clinical and radiological features. Routine gross examination and required number of sections were taken and stained with hematoxylin and eosin. Result: In the study, 84 cases were of Inflammatory and Non neoplastic lesions. Nasal polyps were the most common lesions with 77 (91.67%) cases. Among the all Nasal polyps, 77 cases, 20 (25.97%) cases were of Allergic polyp, 50 (64.93%) cases were of inflammatory polyp, while 7 (9.09%) cases were of Antrochoanal polyp. 2 cases (2.38%) each of Sinusitis and Intradermal naevus. Rhinosporidiosis, Mucocele and Nasolabial cyst comprised of 1 (0.77%) case each respectively. Conclusion: In our study, most common lesions were Nasal Polyps. Most of the cases were presented in 2nd and 3rd decade of life with Male preponderance. Nasal obstruction was the most common clinical presentation in the present study

Low Power Explicit Pulse Triggered Flip-Flop Design Based On A Pass Transistor

In VLSI system design, power consumption is the ambitious issue for the past respective years. Advanced IC fabrication technology grants the use of nano scaled devices, so the power dissipation becomes major problem in the designing of VLSI chips. In this paper we present, a low-power flip-flop (FF) design featuring an explicit type pulse-triggered structure and a modified true single phase clock latch based on a signal feed-through scheme using pass transistor. The offered design successfully figure out the long discharging path problem in conventional explicit type pulse-triggered FF (P-FF) designs and achieves better power performance by consuming low power. The proposed design also significantly reduces delay time, set-up time and hold time. Simulation results based on TMC 180nm CMOS technology reveal that the proposed design features the best power and delay performance in several FF designs under comparison

Histopathological study of non-neoplastic lesions of nose, paransal sinuses and nasopharynx

Background: The various lesions of the nose, paranasal sinuses and nasopharynx were subjected to histopathological evaluation over a period of 5 years (2010 to 2015) at the Department of Pathology, in a rural based hospital. Total 84 specimens were studied over the time of 5 years. Methodology: The formalin fixed specimens were received with complete clinical and radiological features. Routine gross examination and required number of sections were taken and stained with hematoxylin and eosin. Result: In the study, 84 cases were of Inflammatory and Non neoplastic lesions. Nasal polyps were the most common lesions with 77 (91.67%) cases. Among the all Nasal polyps, 77 cases, 20 (25.97%) cases were of Allergic polyp, 50 (64.93%) cases were of inflammatory polyp, while 7 (9.09%) cases were of Antrochoanal polyp. 2 cases (2.38%) each of Sinusitis and Intradermal naevus. Rhinosporidiosis, Mucocele and Nasolabial cyst comprised of 1 (0.77%) case each respectively. Conclusion: In our study, most common lesions were Nasal Polyps. Most of the cases were presented in 2nd and 3rd decade of life with Male preponderance. Nasal obstruction was the most common clinical presentation in the present study

Cultures of caste and rural development in the social network of a south Indian village

Cultures of caste in much of rural India have become entangled with institutions of rural development. In community-driven development, emphasis on “local resource persons” and “community spokespersons” has created new opportunities for brokerage and patronage within some villages, which interact with existing forms of authority and community afforded by caste identity and intra-caste headmanship. In this article, we study how these entangled cultures of caste and development translate into social network structures using data on friendship ties from a south Indian village. We find that although caste continues to be important in shaping community structures and leadership in the village’s network, its influence varies across different communities. This fluidity of caste’s influence on community network structures is argued to be the result of multiple distinct yet partially overlapping cultural-political forces, which include sharedness afforded by caste identity and new forms of difference and inequality effected through rural development

The unstable coastline: navigating dispossession and belonging in Colombo

This article explores how residents of a small coastal fishing enclave in Colombo live with cumulative waves of dispossession brought on by exclusionary projects of urban development. Drawing on ethnographic fieldwork, I introduce the analytic of navigation to describe how people move, plan and live with both present and future threats of dispossession. Navigation offers a unique perspective on questions of agency and resistance in oppressive conditions. Rather than framing subjects as “resisting” projects of world-class city-making, this analysis shows that urban residents instead engage in complex and occasionally contradictory modes of living with uncertainty. I complicate existing understandings of the term “navigation” by describing how questions of nation and belonging are crucial to comprehending how people navigate. Ultimately, I suggest that expressions of belonging and obligation to an imagined community might not only be strategic, but instead reflect some of the broader social forces which structure possibilities for action

ZnO/CuSCN nano-heterostructure as a highly efficient field emitter: a combined experimental and theoretical investigation

We report the synthesis of two-dimensional porous ZnO nanosheets, CuSCN nanocoins, and ZnO/CuSCN nano-heterostructure thin films grown on fluorine-doped tin oxide substrates via two simple and low-cost solution chemical routes, i.e., chemical bath deposition and successive ionic layer adsorption and reaction methods. Detail characterizations regarding the structural, optoelectronic, and morphological properties have been carried out, which reveal high-quality and crystalline synthesized materials. Field emission (FE) investigations performed at room temperature with a base pressure of 1 × 10–8 mbar demonstrate superior FE performance of the ZnO/CuSCN nano-heterostructure compared to the isolated porous ZnO nanosheets and CuSCN nanocoins. For instance, the turn-on field required to draw a current density of 10 μA/cm2 is found to be 2.2, 1.1, and 0.7 V/μm for the ZnO, CuSCN, and ZnO/CuSCN nano-heterostructure, respectively. The observed significant improvement in the FE characteristics (ultralow turn-on field of 0.7 V/μm for an emission current density of 10 μA/cm2 and the achieved high current density of 2.2 mA/cm2 at a relatively low applied electric field of 1.8 V/μm) for the ZnO/CuSCN nano-heterostructure is superior to the isolated porous ZnO nanosheets, CuSCN nanocoins, and other reported semiconducting nano-heterostructures. Complementary first-principles density functional theory calculations predict a lower work function for the ZnO/CuSCN nano-heterostructure (4.58 eV), compared to the isolated ZnO (5.24 eV) and CuSCN (4.91 eV), validating the superior FE characteristics of the ZnO/CuSCN nano-heterostructure. The ZnO/CuSCN nanocomposite could provide a promising class of FE cathodes, flat panel displays, microwave tubes, and electron sources

Synthesis and biological activity of 7-(2-(1H-1,2,4-triazol-1-yl)ethoxy)-4-(styryl/4-substituted styryl)-2H-chromen-2-one

1197-1102Incorporation of other hetero-compounds to parent coumarin increases its effectiveness towards its bioactivity. In view of this finding we have synthesized coumarin triazole derivatives. The key synthon used for this reaction pathway are 7-hydroxy-4-methyl-2H-chromen-2-one. This substituted coumarin has been refluxed with 1-bromo-2-chloroethane in presence ofanhydrous K2CO3 to afford 7-(2-chloroethoxy)-4-methyl-2H-chromen-2-one, which has been condensed with triazole to yield4-methyl coumarin triazole derivative by optimising solvent/base pair. 4-Methyl group of coumarin triazole derivative has beencondensed with aromatic aldehydes to afford 7-(2-(1H-1,2,4-triazol-1-yl) ethoxy)-4-(styryl/4-substituted styryl)-2H-chromen-2-one 7a-e. All the synthesized products are characterized using IR and, 1H, 13C NMR, mass spectroscopy and elemental analysis.Final synthesized compounds 7a-e have been evaluated for their anti-bacterial and anti-fungal activity

Synthesis and biological activity of 7-(2-(1H-1,2,4-triazol-1-yl)ethoxy)-4-(styryl/4-substituted styryl)-2H-chromen-2-one

Incorporation of other hetero-compounds to parent coumarin increases its effectiveness towards its bioactivity. In view of this finding we have synthesized coumarin triazole derivatives. The key synthon used for this reaction pathway are 7-hydroxy-4-methyl-2H-chromen-2-one. This substituted coumarin has been refluxed with 1-bromo-2-chloroethane in presence of anhydrous K2CO3 to afford 7-(2-chloroethoxy)-4-methyl-2H-chromen-2-one, which has been condensed with triazole to yield 4-methyl coumarin triazole derivative by optimising solvent/base pair. 4-Methyl group of coumarin triazole derivative has been condensed with aromatic aldehydes to afford 7-(2-(1H-1,2,4-triazol-1-yl) ethoxy)-4-(styryl/4-substituted styryl)-2H-chromen-2-one 7a-e. All the synthesized products are characterized using IR and, 1H, 13C NMR, mass spectroscopy and elemental analysis. Final synthesized compounds 7a-e have been evaluated for their anti-bacterial and anti-fungal activity.