Correspondence of butterfly and host plant diversity: Foundation for habitat restoration and conservation

At a spatial scale, the diversity of butterflies varies with numerous factors including the availability of the host plant species. In parity with this proposition, the correspondence of diversity of butterfly and plant in the background of the urban–rural gradient was evaluated using Kolkata, India, as a model study area. The results reveal significant positive correlation between the diversity of butterflies and the plants, with the different values for the suburban, rural, and urban areas. Identification of the butterfly loads for the plants in the respective areas can be useful in enhancing the conservation of the butterflies through enhanced plantation of the concerned plant species. Alternatively, the disclosure of the generalist and specialist pattern of the plant species preference by the butterflies may be useful in enhancing the population of the respective species in the concerned areas. The conservation strategy for butterfly species may be refined through the use of both or any one of the quantitative assessment of the butterfly–plant links in the urban–rural gradient in Kolkata, India, and similar places in the world

An Efficient Edge Servers Selection in Content Delivery Network Using Voronoi Diagram

Handle on demand network popularity of the Content Delivery Network and solve the flash crowd problem, caching web content at the internet’s edge server has been emerged. To provide faster service of the web users, content come from nearby edge servers. Therefore nearest edge server finding of a particular web user is an open research problem and it ensures a faster response time and download time of the requested content due to reduced latency. Our simulation study and application to a real set of geographical coordinates of the edge servers which are geographically dispersed and a well-known geometric device, Voronoi diagram is used for decomposing the earth surface around each location of a particular edge server and closest edge servers of the requested web user is searched by the nearest neighbor queries using Delaunay triangulation property over the aforesaid decomposed earth surface

Planning from the Bottom up:

Planning from the Bottom up highlights the gap between the official rhetoric and the political reality of democratic decentralisation and bottom-up planning using an in-depth study of the metropolitan planning process in Kolkata, India. The key issue addressed here is how elected officials at different governmental levels, professional planners, and ordinary citizens interact in the process of metropolitan planning, and which players dominate the process. The focus is on the dynamic interactions between planners and the operation of the political process that shapes this reality. This book illustrates that there are differences in the real motives for the state to pursue decentralisation and what it claims to be behind its decentralisation policy and that the planning process is unlikely to be truly bottom-up if power is concentrated within any one political party. It also depicts how external funding, either from international agencies or higher levels of government, has the potential to force change in the local and regional structures of decision-making so that the voices of ordinary people can be included in public decision-making; for the effective implementation of bottom-up approaches to metropolitan planning the planning bureaucracy needs to be independent of the political class and bottom-up planning requires that planning capacity be built from a grassroots level. This requires devolution of both responsibilities and means/resources to carry out those responsibilities to the lowest level of planning

Newspapers Having ‘National’ Character Likely to Bring Out the Environmental News in Enhanced Numbers: A Serious Study

Media has a massive role in communicating information in various kinds. Particularly, the print media is serving society powerfully with their development in various fields including technological aspects. Within the sharp competition, each media wants to hold their audience with continuous innovative items. The environment is such a contemporary subject which has a fair demand. The space is so valuable. In this study, the status of the English and the Bengali dailies in connection with environmental journalism, especially the most available ‘categories' in local newspapers have been scrutinised. All the local newspapers played an influential role to publish environmental news regular basis. But the local newspapers do not have the adequate infrastructure to carry ‘National News' and ‘International News' even ‘Local News' on the environment. Newspapers having the national character encourages carrying more and more numbers of ‘National News' and ‘International News' as well as ‘Local News' on environmental. Keywords: Newspaper, Environment, infrastructure, national character

Global Asthma Network Phase I Surveillance: Geographical Coverage and Response Rates.

Background-The Global Asthma Network (GAN) Phase I is surveying school pupils in high-income and low- or middle-income countries using the International Study of Asthma and Allergies in Childhood (ISAAC) methodology. Methods-Cross-sectional surveys of participants in two age groups in randomly selected schools within each centre (2015-2020). The compulsory age group is 13-14 years (adolescents), optionally including parents or guardians. Six to seven years (children) and their parents are also optional. Adolescents completed questionnaires at school, and took home adult questionnaires for parent/guardian completion. Children took home questionnaires for parent/guardian completion about the child and also adult questionnaires. Questions related to symptoms and risk factors for asthma and allergy, asthma management, school/work absence and hospitalisation. Results-53 centres in 20 countries completed quality checks by 31 May 2020. These included 21 centres that previously participated in ISAAC. There were 132,748 adolescents (average response rate 88.8%), 91,802 children (average response rate 79.1%), and 177,622 adults, with >97% answering risk factor questions and >98% answering questions on asthma management, school/work absence and hospitalisation. Conclusion-The high response rates achieved in ISAAC have generally been maintained in GAN. GAN Phase I surveys, partially overlapping with ISAAC centres, will allow within-centre analyses of time-trends in prevalence

Leishmaniasis: Plants as a source of antileishmanial agents

Leishmania infection causes a group of tropical diseases and has remained neglected for decades. It spreads by sandfly vector and is one of the most fatal protozoan diseases after malaria. Leishmaniases are a group of diseases caused by the infection of different Leishmania species and display clinically different forms like “Visceral leishmaniasis” (VL), “mucocutaneous leishmaniasis” and “cutaneous leishmaniasis” (CL). Approximately one billion people living in an endemic area are at high risk. Three hundred thousand cases of VL are reported annually and around twenty thousand people die every year, proving it as one of the most lethal forms of leishmaniasis. Until now, no effective vaccine could be made. There is an increase in drug resistance in the case of conventional drugs. New synthetic drugs are either too costly or have side effects. Requirements of new drugs are of utmost importance to control this situation. Plants provide a source of unlimited chemical diversity, which can be screened for antileishmanial activities. Moreover, their low cost and less or no side effects make them idle candidates in the search of new antileishmanial drugs

Prevalence study of common environmental allergens in children with asthma and allergic rhinitis in Kolkata: A hospital-based study

Background: Studies evaluating the role of skin prick testing (SPT) as the sole testing technique in children below 12 years of age involving a broader and more relevant group of aero- and food-allergens in this part of India are still lacking. Objectives: To identify the commonly prevalent environmental allergens by SPT in children with asthma as per British Thoracic Society and Scottish Intercollegiate Guidelines Network Criteria and allergic rhinitis (AR) as per British Society for Allergy and Clinical Immunology Criteria attending the OPD of a tertiary care pediatric unit in the eastern part of India. Methods: Testing of inhalant and food allergens by SPT in children from 4 to 12 years age group with asthma and AR satisfying the inclusion criteria. Results: Total 106 children (70 males and 36 females) were included in the study. Study of inhalant allergens in asthmatic patients revealed the highest positivity for house dust mite followed by male cockroach and among food allergens, highest positivity for egg/egg products, followed by milk/milk products. Study of inhalant allergens in asthmatic patients with coexistent AR revealed the highest positivity for house dust mite, cockroach male and female and among food allergens, highest for milk/milk products, egg/egg products, banana, and mustard. Conclusions: In Kolkata, in the eastern part of the country, among the asthmatic children of 4-12 years age group, the most common inhalant allergens were house dust mite and cockroach, whereas the common food allergens identified were milk and milk products, egg and egg products, and mustard

Ripping yarns: Science in Asia

The article explores the life and works of botanist Joseph Rock, historian Joseph Needham, and physicist J. C. Bose. Rock's expeditions and personality have become an enduring part of China's history which shows the notion that scientists participate in public affairs. Needham has embraced the documentation of the country's history of science and technology. Bose's infusion of three careers shows the notion that science is a blend of logic and imagination

A molecular and epidemiological study of Vibrio cholerae isolates from cholera outbreaks in southern Ghana

Cholera remains a major global public health threat and continuous emergence of new Vibrio cholerae strains is of major concern. We conducted a molecular epidemiological study to detect virulence markers and antimicrobial resistance patterns of V. cholerae isolates obtained from the 2012-2015 cholera outbreaks in Ghana. Archived clinical isolates obtained from the 2012, 2014 and 2015 cholera outbreaks in Ghana were revived by culture and subjected to microscopy, biochemical identification, serotyping, antibiotic susceptibility testing, molecular detection of distinct virulence factors and Multi-Locus Variable-Number of Tandem-Repeat Analysis (MLVA). Of 277 isolates analysed, 168 (60.6%) were confirmed to be V. cholerae and 109 (39.4%) isolates constituted other bacteria (Escherichia coli, Aeromonas sobria, Pseudomonas aeruginosa, Enterobacter cloacae and Enterococci faecalis). Serotyping the V. cholerae isolates identified 151 (89.9%) as Ogawa, 3 (1.8%) as Inaba and 14 (8.3%) as non-O1/O139 serogroup. The O1 serogroup isolates (154/168, 91.7%) carried the cholera toxin ctxB gene as detected by PCR. Additional virulence genes detected include zot, tcpA, ace, rtxC, toxR, rtxA, tcpP, hlyA and tagA. The most common and rare virulence factors detected among the isolates were rtxC (165 isolates) and tcpP (50 isolates) respectively. All isolates from 2014 and 2015 were multidrug resistant against the selected antibiotics. MLVA differentiated the isolates into 2 large unique clones A and B, with each predominating in a particular year. Spatial analysis showed clustering of most isolates at Ablekuma sub-district. Identification of several virulence genes among the two different genotypes of V. cholerae isolates and resistance to first- and second-line antibiotics, calls for scaleup of preventive strategies to reduce transmission, and strengthening of public health laboratories for rapid antimicrobial susceptibility testing to guide accurate treatment. Our findings support the current WHO licensed cholera vaccines which include both O1 Inaba and Ogawa serotypes

Influence of single and binary doping of strontium and lithium on in vivo biological properties of bioactive glass scaffolds

Effects of strontium and lithium ion doping on the biological properties of bioactive glass (BAG) porous scaffolds have been checked in vitro and in vivo. BAG scaffolds were prepared by conventional glass melting route and subsequently, scaffolds were produced by evaporation of fugitive pore formers. After thorough physico-chemical and in vitro cell characterization, scaffolds were used for pre-clinical study. Soft and hard tissue formation in a rabbit femoral defect model after 2 and 4 months, were assessed using different tools. Histological observations showed excellent osseous tissue formation in Sr and Li + Sr scaffolds and moderate bone regeneration in Li scaffolds. Fluorochrome labeling studies showed wide regions of new bone formation in Sr and Li + Sr doped samples as compared to Li doped samples. SEM revealed abundant collagenous network and minimal or no interfacial gap between bone and implant in Sr and Li + Sr doped samples compared to Li doped samples. Micro CT of Li + Sr samples showed highest degree of peripheral cancellous tissue formation on periphery and cortical tissues inside implanted samples and vascularity among four compositions. Our findings suggest that addition of Sr and/or Li alters physico-chemical properties of BAG and promotes early stage in vivo osseointegration and bone remodeling that may offer new insight in bone tissue engineering