Efficient Reusable Gold-Mesoporous Silica Nanocatalysts for Aromatic Nitro Reduction: Role of Phenolic Chelating Ligands on Immobilizing Gold Nanoparticles and Catalytic Activity

Developing heterogeneous metal nanocatalysts is highly desirable since the catalyst can be easily separated and reused for several times. In this manuscript, we have immobilized gold nanoparticles (AuNPs) on the surface of mesoporous silica (SiO[Formula: see text] using simple amino acid-based phenolic chelating molecules and utilized as highly reusable catalyst for nitroarene reduction. The synthesized nanocomposites (Au@SiO2-1 and Au@SiO2-2) have been unambiguously confirmed using powder X-ray diffraction (PXRD), Fourier transform infrared (FT-IR), high resolution-transmission electron microscopy (HR-TEM) and X-ray photoelectron spectroscopy (XPS). Interestingly, Au@SiO2-1 exhibited highly enhanced 4-nitrophenol reduction that was studied using absorption spectroscopy. Further catalytic activity of Au@SiO2-1 was also explored for 2-nitroaninline and 4-nitroaniline. The reusable studies demonstrated that the catalyst did not show significant change in the activity up to ten cycles. After catalytic reactions studies confirmed the strong attachment of AuNPs on the SiO2 matrix.

Isolation of Shewanella putrefaciens GRD 03 from Fish and Explication of Biofilm Adherence Potency on Different Substrates

Foodborne pathogens are the main threat and cause of food poisoning. The majority of food infections have been related to the biofilm formation of foodborne pathogens in the food industry. Shewanella putrefaciens (KX355803, GRD 03), a Gram-negative pathogen isolated from mackerel fish, was identified and recognized as a food spoilage bacterium and a strong biofilm producer. The adhesion or attachment ability of Shewanella putrefaciens was determined on steel, plastic, glass, PVC and wood. NB (Nutrient broth), LB (Luria-Bertani broth), TSB (Tryptic soy broth) and BHI (Brain heart infusion broth) were enriched with glucose and shows optimum for bacterial adhesion. In the microtiter plate method (MTP), the strong attachment was observed at 48 and 72 hours of incubation and significant differences were obtained at p < 0.05. As the incubation period increases, the OD value (Optical density) of samples also increase. Biofilm formation is the major cause cross-contamination, and shows resistance to certain disinfectants, which leads to environmental stress tolerance. This study suggested with optimum biofilm production of isolate from fish by using glucose enriched media on different substrates, also comparing different growth media provide a detailed idea about biofilm-forming ability at different incubation time intervals.

A Typology of Attitudes towards the E-Bike against the Background of the Traditional Bicycle and the Car

Although it is generally accepted that innovators and early adopters have a particular influence on the uptake of electric bikes, other groups, whose reactions to innovation have not been studied, are perhaps wrongly marginalised. Such individuals, often relying on stereotypes, also need to be included in researchers’ scope of interest. Therefore, the aim of the CAWI survey was to determine the attitudes of respondents, both users and non-users of electric bikes, and on this basis to classify by k-means analysis the attitudes towards the e-bike compared to the traditional bicycle and the car. The results obtained show a large variation between the designated classes. What most of them have in common is a strong attachment to the private car, which is typical for the cycling culture of this part of Europe, but the psycho-physical characteristics of the surveyed remain the strongest differentiating factor. Therefore, in the light of the opinions collected, it seems that the group Gadget lovers 1 and 2, whose share was about one-quarter of the total number surveyed, may be the most inclined to change their transport behaviour. This means that the e-bike, as an innovation, can overcome a critical discontinuity stage on the innovation diffusion curve in the Innovation Adaptation Lifecycle (IAL).

The Preservation of Spousal and Partner Relationships Among Nursing Home Residents

The decision to seek placement in a nursing home may be especially difficult for spouses or partners of the potential nursing home residents. Disruption of the attachment relationship following placement may influence the psychosocial well-being of nursing home residents. Although the responsibility of nursing home staff is to ensure psychosocial well-being, including awareness of the influence that separation can have on a spousal or partner relationship, little is known about services offered for the maintenance of spousal and partner relationships. This study was conducted to identify nursing home practices that had preservation of spouse/partner relationships as the goal. A mixed methods approach utilized both an online survey (81 respondents) with nursing home social workers in four Southern states and ten telephone interviews (from among the respondents). Survey results revealed that 49% of respondents’ facilities had a written policy to preserve these relationships, however, only 22% reported having a specific formal program to carry this out. In the interviews, participants expanded on survey topics and shared that facilitating outings and encouraging participation in routine facility activities were commonly used to preserve relationships. Privacy was discussed as being important in maintaining relationships and also found to be a barrier to doing so. Nursing home social workers can utilize the results in the design and implementation of specific services to preserve relationships and maintain strong attachment between residents and their spouses/partners. These will be best carried out in a coordinated, collaborative manner among multiple disciplines within the nursing home setting.

Companion Animal Ownership and Mood States of University Students Majoring in Animal Sciences during the COVID-19 Pandemic in Japan

COVID-19 caused great difficulties in many people’s daily lives, including university students in Japan. This study examined whether living with companion animals and attachment to companion animals influence the moods of university students. Students answered a questionnaire, including demographic data, companion animal ownership, attachment to their companion animals, perceived difficulties from COVID-19, and Profile of Mood States 2 (POMS2) results. A total of 180 students answered the questionnaire. Stepwise multiple regression analyses were conducted to identify factors related to the total mood disturbance (TMD) score of the POMS2. In the regression model, perceived difficulties from COVID-19 and having a companion animal and a strong attachment to their companion animals were significantly correlated with TMD and served as the predictor variables. The first variable was positively related to TMD, whereas companion animal ownership with high attachment to their companion animals was negatively related to TMD. This finding indicated that companion animal ownership with high attachment to their companion animals would relate to a positive mood in university students majoring in animal sciences during the COVID-19 pandemic. However, because of the limited population in size and by the students’ major, the results need to be interpreted as a possible effect of companion animals, and not as conclusive evidence to support the effects of animals.

Leslie Marmon Silko’s “Lullaby”: A Pantheistic View

This study highlights the pantheistic perspectives of the Native American society depicted in Leslie Marmon Silko’s short story “Lullaby”. The protagonist’s divine and strong attachment to the objects of the natural world emboldens her to face several dangers in her life. The dominant ways of the Western world lead the central character Ayah into complete chaos. But the superior power of nature forces her to face internal and external struggles. She never curses her fate but tries to move with the ways of the world, tells readers about her willingness to be assimilated into an alien culture and retains her faith in nature and its objects. Nature acts as a guiding light in her life. She lives her life by singing traditional songs. The ideas discussed in the study are socially significant in the current century because we can see how man tries to ignore power of nature and how his unnatural ways disrupt the balance of our natural world.

With the Family, Good Not Only in the Picture? About the Polish Attitude Towards the Family in the Opinion of the Surveyed Poles and Slovenes

This article discusses attitudes towards the family – one of the distinct semantic categories forming the linguo-cultural stereotype of a Pole, which we have reconstructed on the basis of questionnaire data. The methodology used is that of the linguistic image of the world, which includes stereotypes. The linguistic data was divided into sections: 1) type of relationship; 2) starting a family; family size and members; 3) other. The reconstructed model confirms that Poles have a very positive attitude to the family – as seen from their own, as well as a foreign (Slovenian) perspective. Poles form close family bonds, which is demonstrated by their strong attachment to tradition and family.

Intentional Citizenship and Regime Types

This chapter applies the idea of “intentional citizenship” to real-world states and their citizens. It examines people’s attitudes to their state as reported in cross-national attitude surveys on national identity. This data demonstrates that in most democratic countries, large majorities of the population have a fairly strong attachment to their country or their state, and are its intentional participants. As such they are liable for a nonproportional distribution of their states’ remedial obligations. The chapter then turns to examine the scope of intentional citizenship in nondemocratic states. Using recent studies from comparative politics on the nature of nondemocratic states, it examines the ways in which patterns of civic participation, state oppression and state manipulation affect intentional citizenship.

Robust scalable reversible strong adhesion by gecko-inspired composite design

Bio-inspired reversible adhesion has significant potential in many fields requiring flexible grasping and manipulation, such as precision manufacturing, flexible electronics, and intelligent robotics. Despite extensive efforts for adhesive synthesis with a high adhesion strength at the interface, an effective strategy to actively tune the adhesion capacity between a strong attachment and an easy detachment spanning a wide range of scales has been lagged. Herein, we report a novel soft-hard-soft sandwiched composite design to achieve a stable, repeatable, and reversible strong adhesion with an easily scalable performance for a large area ranging from ∼1.5 to 150 cm2 and a high load ranging from ∼20 to 700 N. Theoretical studies indicate that this design can enhance the uniform loading for attachment by restraining the lateral shrinkage in the natural state, while facilitate a flexible peeling for detachment by causing stress concentration in the bending state, yielding an adhesion switching ratio of ∼54 and a switching time of less than ∼0.2 s. This design is further integrated into versatile grippers, climbing robots, and human climbing grippers, demonstrating its robust scalability for a reversible strong adhesion. This biomimetic design bridges microscopic interfacial interactions with macroscopic controllable applications, providing a universal and feasible paradigm for adhesion design and control.

I'm difficult, but not impossible: how millennials view international assignments and the implications for human resource management (HRM)

PurposeThe purpose of this study is to identify what (de)motivates millennial students from undertaking mobility upon graduation and whether this depends on gender, region of origin, prior work experience, level of studies, or international mindset and how. The paper provides insights on the preferred length of mobility and the most (un)attractive regions.Design/methodology/approachThe sample consists of 1,001 millennial students from 77 countries. Data from a quantitative self-reported survey were analysed employing exploratory factor analysis and confirmatory data analyses.FindingsFactors that motivate mobility are personal development, learning about foreign cultures and the opportunity to travel and those that demotivate are a preference for short-term assignments, unwillingness of family to move and disruption of home country life. Factors differ by region, gender, level of current studies and the student's international mindset.Research limitations/implicationsThe cohort included only students pursuing a business or technical education. A willingness to accept an international assignment may not necessarily translate into accepting an international assignment due to the effect of the attitude–behaviour gap. The authors do not aim to generalise on the basis of the results since the sample was fairly disproportionate in terms of world regions. We do, however, invite further studies to treat ours as potential input for new and emerging studies of either a quantitative or qualitative nature.Practical implicationsDue to a strong attachment to home, short-term assignments are preferred. Salary and financial benefits remain hygienic factors and motivating factors remain on the “soft” side. Motivating millennials to engage in mobility requires an individualised approach, dependent on region of origin, gender, the level of education, work experience and international mindset.Originality/valueThis study indicates that the factors that (de)motivate millennial students to engage in international assignments differ on the basis of various socio-demographic variables.