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This information will be useful in the selection of materials and technology for the detection and removal of mercury ions at a low cost and with high sensitivity and selectivity. The purpose of this study is to provide the useful information for selection of materials and technology to detect and remove the mercury ions from water with high sensitivity and selectivity. The purpose of this study is to provide the useful information for selection of materials and technology to detect and remove the mercury ions from water with high sensitivity and selectivity.

Different nano- and bio-materials allowed for the development of a variety of biosensors – colorimetric, chemiluminescent, electrochemical, whole-cell and aptasensors – are described. The materials used for their development also make it possible to use them in removing heavy metals, which are toxic contaminants, from environmental water samples.

This review focuses on different technologies, tools and materials for mercury (heavy metals) detection and remediation to environmental samples.

This review gives up-to-date and systemic information on modern nanotechnology methods for heavy metal detection. Different recognition molecules and nanomaterials have been discussed for remediation to water samples. The present review may provide valuable information to researchers regarding novel mercury ions detection sensors and encourage them for further research/development.

The purpose of this study is determination of cadmium using silver-gold bimetallic nanoparticles (Ag-Au BMNPs) and an aptamer modified glassy carbon electrode.

The maximum response of modified electrode was obtained with, 50 mV pulse amplitude, 20 mV/s scan rate in phosphate buffer of pH 4.0. Ag-Au BMNPs, as the mediators improved electron transmit during the entire electron transfer process and the aptasensor response. Herein, the authors used aptamer as the capture probe to prepare an aptasensor with enhanced stability.

The proposed aptasensor exhibited a wide linearity to cadmium in the range of 0.001–0.100 µg/L with a low detection limit of 0.005×10⁻³ µg/L. The glassy carbon electrodes with Ag-Au BMNPs showed a lower detection limit.

This aptasensor has good reproducibility, stability and repeatability and is cost-effective to regenerate. The specificity and selectivity of the novel modified electrode is tested in the presence of other interfering metal ions such as Fe²⁺, Mn²⁺, Mg²⁺, Sb³⁺ and Bi³⁺. The aptasensor shows 10 times more sensitivity and selectivity for Cd²⁺ ions.

The purpose of this paper is to develop a sensitive and cost effective colorimetric sensor for detection of methyl parathion (MP) using simple circuitry. A simple and sensitive concept of colorimetric sensor instrument represents a rapidly expanding field of sensor techniques to monitor MP neurotoxins is described within certain conditions of producing color in samples. The variation of intensity of color with concentration provides discrimination between different concentrations of MP. The colorimetric instrument displays well‐defined signals towards hydrolyzed samples of MP.

The principle of light intensity measurement has been applied to measure various concentrations of MP based on Lambert‐Beer theory. This device and its processes are useful for quantitative analysis of MP. The detection limits were found within a range of 0.1‐1.5 ppm.

The experiments from sophisticated analytical techniques are costly and time‐consuming processes that validate the proposed system.

This paper's original proposition of using quantification of MP with colorimetric sensor instrument obtained promising results.

The colorimetric sensor instrument provides a new method for quantification of MP in unknown samples within detection limits.

This paper aims to investigate the causal inferences between mobile application adoption and changes in travelers’ purchasing behavior regarding services supported by the travel and tourism industry.

Using a quasi-experiment conducted by an airline, data sets from more than 10,000 travelers were collected, and hypotheses were tested using propensity score matching and difference-in-difference methods.

Mobile application adoption has a significant positive effect on the total purchasing frequency of services and a significant adverse effect on booking tickets in advance and purchasing frequency from self-owned websites. Besides, this finding also suggested that members or travelers who had high average purchases in the past tend to buy more air tickets on average after mobile application adoption, while the number of days to book tickets in advance and purchase auxiliary services declined after mobile application adoption. However, males purchased more auxiliary services via mobile applications.

The study is based on the causal effect of mobile application adoption on purchasing behavior. Nevertheless, the theoretical basis remains relatively weak. Furthermore, the underlying mechanisms that cause the changes in purchasing behavior via mobile applications need to be elucidated.

This study enriches the hospitality and tourism literature on mobile application adoptions, multichannel purchasing behavior and revenue management. First, a quasi-experimental design is used to verify a causal relationship between mobile applications’ adoption and travelers’ purchasing behavior in the travel and tourism industry. Second, this study adds to examining travelers’ multichannel purchasing behavior in the travel and tourism industry. Third, this work enriches the current literature that explores auxiliary services and revenue management in the travel industry.

Mobile application adoption significantly impacted the travel and tourism industry. Besides, To the best of the authors’ knowledge, this is one of the first empirical studies that examined changes in purchasing behavior due to mobile application adoption from the perspective of service type. The findings provide the first evidence of the impact of mobile application adoption on service purchasing in the travel industry.

The study aims to understand how corporate social responsibility (CSR) and happiness are used together in various research studies to serve the ultimate goal of corporate sustainability (CS), which in turn contributes to sustainable development.

A systematic literature review (SLR) was made using Preferred Reporting Items for Systematic Reviews and Meta-Analysis (PRISMA) method in the two most-reputable databases of Web of Science (WoS) and Scopus, revealing a final list of 54 studies to analyse.

The review concludes that the literature on CSR and happiness provides three main findings: first, concerning the pillars of sustainability, most of the studies concentrate on people, neglecting the planet and profit, second, employees are subject to the highest number of studies as the target of CSR initiative and third, almost all studies employed the hedonic aspect of happiness in CSR literature.

This particular research finding points to the need for developing a comprehensive framework to assess stakeholder happiness from both hedonic and eudaimonic aspects from a CSR perspective which is then represented under the three pillars of sustainability.

To contribute to the ultimate goal of CS, management would design CSR initiatives for all stakeholders to increase both hedonic and eudaimonic happiness of them.

The literature provides reviews of research in CSR and happiness separately; however, there is not any research revealing how these two concepts are used together in studies and how this association could be read to serve the goal of CS.

The purpose of this paper is to measure the influence of peers, and the Government and non-governmental organization (NGO) initiatives on an individual’s attitudinal drivers such as environmental knowledge and environmental concern, which are the reasons for their green purchasing intentions. This concept was applied among the Indian young consumers.

For the research, a structured online questionnaire was used to obtain responses from 342 Indians from various cities. The participants were 20-25 years of age. SPSS software package was used to refine the data while SmartPLS was used to test the validity of the hypotheses.

The findings revealed that the Government and NGO initiatives along with peer influence do have a significant effect on a consumer’s environmental knowledge and environmental concerns. Further, this study found a significant positive effect of environmental knowledge and environmental concern on perceived value. In turn, the perceived value had a direct positive impact on green attitude leading to green purchase intention.

This paper provides critical insights for marketers, as well as for governmental agencies and NGOs promoting the conservation of the environment through environmental-friendly practices. These parties aim to generate greater awareness among consumers and impart knowledge about the benefits of green practices.

The studies measuring the impact of external factors on green consumption are scarce. Even the few studies available have measured the direct impact of external factors on green purchase intention. Governmental and NGO initiatives along with peer influence are the stimuli impacting operational factors such as environmental knowledge, environmental concern, perceived value, and green attitude, which, in turn, lead to the response of green purchase intention. This study provides new insights to this relationship by using a stimulus – organism – response framework.

The aim of this paper is to examine the motives behind the separation of household waste (or the lack of such separation) on the basis of the theory of interpersonal behaviour. The aim of this paper is to broaden and deepen the understanding of key determinants of household waste separation (or the lack of such separation). This study proposes a conceptual model based on the theory of interpersonal behaviour in combination with the focus theory of normative conduct.

A quantitative method was applied to investigate the views of 350 heads of households in the Johannesburg metropolitan area through an administered questionnaire. Structural equation modelling was employed to test the hypothesised structural relationships in the proposed model.

The results indicate that household waste separation intention is influenced by cognition of the consequences and by injunctive and personal normative pressures. Separation intention and past habits were found to have a direct influence on actual separation behaviour.

While the theory of planned behaviour is ubiquitous in the recycling literature, this study presents a different, broader framework for a better understanding of the drivers of household waste separation. This is achieved by applying the theory of interpersonal behaviour in combination with the focus theory of normative conduct. The findings provide insights that could help municipalities in emerging markets to promote household waste separation for better management of the environment.

This paper aims to introduce the theme issue and the reasons for focusing on the strategic question: “What are the challenges faced by the hospitality industry in India?”

The paper provides an introduction to the scope of the global hospitality industry and the key issues and challenges, especially as they relate to the industry's development in India.

The paper profiles the approach adopted by theme issue contributors and their respective contributions to addressing the strategic question.

The theme issue draws extensively on roundtable discussions with senior level practitioners so as to balance the analysis drawn from published sources.

India's hospitality industry is developing rapidly and yet there is limited data relating to these developments. This theme issue draws extensively on practitioner inputs and published sources to provide an authoritative contribution that addresses the Indian context and additionally explores the implications for other developing economies.

The purpose of this study is to identify the emerging challenges that are faced by branded budget hotels in India. The paper aims to do this by exploring the expectations as well as challenges faced by the customers and hospitality managers of branded budgets hotels in India.

Utilizing a multi-method approach, data were collected through literature review, eight in-depth interviews and 422 customer reviews. Thematic analysis using the hybrid approach brings out the challenges faced by hospitality managers of branded budget hotels in India.

Hospitality managers face the following challenges – dipping gross operating profits, higher global distribution systems productivity for international hotel brands, location constraints, high royalty structures for management contracts, regulatory issues, business poaching and unorganized growth, bureaucracy among vendors and contactors and lack of trained manpower. Customer expectations include poor check-in/check-out services, inefficient service management, inconsiderate personnel, poor management of feedback and instances of theft.

This work adds to the body of knowledge using real customer data and thematic analysis. The authors have not come across any scholarly work, especially in the Indian context, which looks at two stakeholders of the branded budget hotel industry. Hence, recommendations from this work are valuable for hospitality managers as well as researchers.

This paper aims to identify emerging themes that can help in understanding the preferences of Indian consumers, in the transition generation (25-44 years) (Sinha, 2011), toward sustainability in the luxury lodging industry.

The paper uses a multi-method approach for data collection. Thorough literature review and personal interviews with marketers were conducted to explore the themes and construct tentative thematic webs. In total, 42 customer inputs were drawn through focus groups and personal interviews to validate the themes. Customer perspective, marketers’ perspective and findings from literature were juxtaposed to understand the themes.

“Influence of Parents, Children and Travel agents”, “Rewards for green behaviour” and “frequent communication around sustainability efforts” have been identified as some of the key motivations for consumers to choose sustainability. Some deterrents have been identified as “limited awareness about sustainability issues in Tier II cities”, “detachment with the hotel’s operations”, “higher prices” and “unchecked wasteful/acquisitive consumption”.

Findings from this research work have implications for the practitioners and policy-makers because establishing an understanding of the factors that deter and motivate consumers for engaging in green behavior is important for designing meaningful marketing strategies.

Findings are based on the analysis of data from customer inputs and industry inputs. Themes in this research work have been analytically identified, and this study has made significant academic contributions to the marketing literature. It also provides valuable insights for the practitioners.