A. Higazy, M.H. El‐Rafie, M.A. Ramadan and A. Hebeish
Poly (acrylic) starch composites were prepared by polymerizing acrylic acid, acrylamide alone or in admixtures with maize starch using KMnO4/citric acid as redox initiation. The…
Abstract
Poly (acrylic) starch composites were prepared by polymerizing acrylic acid, acrylamide alone or in admixtures with maize starch using KMnO4/citric acid as redox initiation. The cooked composite pastes were used as partial substituent of kerosene oil emulsion in the pigment printing pastes for cotton fabric. Printing was carried out under a variety of conditions including neutralization of the free carboxylic groups of the polyacrylic acid component in the composite or AA/Aam mixtures, composite concentration, and the type of pigment dyes. The effect of storage on the efficiency of the printing paste was also examined. The printed samples were assessed for colour strength (K/S) overall fastness properties. Results obtained indicate that:
F.A. Abdel‐Mohdy, A. Waly, A. Higazy and A. Hebeish
Perfluoroheptyl methacrylate was copolymerized with acrylamide using different ratios of these monomers. The copolymers so obtained were methylolated with formaldehyde. The…
Abstract
Perfluoroheptyl methacrylate was copolymerized with acrylamide using different ratios of these monomers. The copolymers so obtained were methylolated with formaldehyde. The methylolated copolymers were used as multi‐purpose finishing agents for cotton. They impart oil and water repellence. Attachment of the methylolated copolymer to cotton is presumed to involve chemical bonds via reaction of the methylol groups of the copolymer and the hydroxy groups of cotton cellulose. This was evidenced by the wash‐fastness properties; no significant differences were noted in the oil/water repellence of cotton fabric treated with the copolymers in question.
Denise Bedford and Thomas W. Sanchez
This chapter focuses on emergency and hastily formed knowledge networks. All six facets of knowledge networks are described. The importance of four of the six facets is called…
Abstract
Chapter Summary
This chapter focuses on emergency and hastily formed knowledge networks. All six facets of knowledge networks are described. The importance of four of the six facets is called out, including domain, topology, nodes, and relationships among the networks’ members. The authors provide four network profiles, including emergency and disaster response networks, law enforcement networks, military networks, and militia and vigilante networks.
The purpose of this paper is twofold: first, to explore social risk management strategies amongst Fulani in the subhumid zone of Nigeria; and second, to determine current status…
Abstract
Purpose
The purpose of this paper is twofold: first, to explore social risk management strategies amongst Fulani in the subhumid zone of Nigeria; and second, to determine current status and nature of reciprocal exchange networks, risk pooling and social support for pastoral livelihoods in North-Central Nigeria.
Design/methodology/approach
Surveys of cattle productivity and pastoral livelihoods were carried out amongst Fulani pastoralists on the Jos Plateau: between 2008 and 2013 using participatory epidemiology methods and the sustainable livelihoods framework. Qualitative and quantitative data on livelihood activities, knowledge, attitudes and practices of animal husbandry and disease control, wealth grouping, herd entries and exits was gathered to determine the current state of cattle productivity and pastoral livelihoods in the study area.
Findings
Results show that reciprocal exchange networks for risk management have mostly disintegrated and patron-client relationships have become an important social risk management strategy.
Practical implications
This research has significant implications for sustainability of Fulani livelihoods and communities: decreased social risk-management strategies and increased self-reliance means that the most vulnerable households will find it more difficult to withstand shocks and climb out of poverty. Wealthier households may cope better with high incidence/low severity shocks like but are more vulnerable to low incidence/high severity shocks. Likewise, decreased social cohesion reduces the ability of communities to mobilise and act collectively in the face of community-level shocks. This is very important for engagement with the state – a crucial process, given current levels of acrimony and conflict.
Originality/value
Given the high levels of farmer-herder conflict and civil unrest in this region over the past 15 years this research is valuable in providing insights into economic drivers of conflict, current dynamics of pastoral livelihoods and social cohesion within and between communities.
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Starch/carboxymethylstarch‐poly (acrylonitrile, acrylamide, vinyl acetate) composites have been successfully prepared through polymerization of acrylonitrile, acrylamide or vinyl…
Abstract
Starch/carboxymethylstarch‐poly (acrylonitrile, acrylamide, vinyl acetate) composites have been successfully prepared through polymerization of acrylonitrile, acrylamide or vinyl acetate with starch or carboxymethyl starch (CMS) using ceric‐ion type CeIV catalyst. The obtained composites were saponified using alcoholic KOH solution. Regardless of the composite used, results obtained led to the following: (a) enhancement of solubility percent as compared with starch and CMS; (b) the size removal reaches 100 percent for a given set of desizing condition used; (c) the tensile strength and elongation at break increase with sizing, while crease recovery decreases; (d) sizing treatment in the presence of the prepared composites gives positive influence on the abrasion resistance; and (e) incorporation of CMS in composite form in the sizing formulation exerts a considerable positive influence on the performance properties of the sized fabrics as compared with other sizing agents under investigation.
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The purpose of this paper is to investigate cutting-edge coagulant materials and procedures for the removal of harmful microplastics from the water.
Abstract
Purpose
The purpose of this paper is to investigate cutting-edge coagulant materials and procedures for the removal of harmful microplastics from the water.
Design/methodology/approach
Traditional methods of removing microplastics from water bodies, like filtration, face limitations due to the small sizes involved. Hence, coagulation and flocculation emerge as essential strategies to enhance filtration efficacy. This paper summarizes recent research on coagulant materials, including novel hybrids, for water purification. It also looks at the most recent improvements in coagulation and flocculation processes, as well as the factors that influence their efficiency.
Findings
This paper highlights recent research on coagulant materials, including novel hybrids, used in water purification. It also examines the most recent advancements in coagulation and flocculation procedures, as well as the elements influencing their effectiveness.
Originality/value
The environmental threat posed by plastics, especially in their non-naturally degradable forms, such as microplastics, has reached alarming proportions. These minute particles pervade our air, soil and water bodies, driven by various factors and sources. Their diminutive size, whether in micro or nano form, renders them ingestible by marine and freshwater organisms, as well as humans, posing significant health risks. Traditional methods of water cleaning are not effective in dealing with very small-sized plastics and hence this paper summarizes recent research on coagulant materials, including various novel hybrids, for water purification from tiny microplastics in detail.
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This paper argues that the nation's immigration laws are being misused to craft a system of preventive administrative detention of immigrant men, predominantly of Middle Eastern…
Abstract
This paper argues that the nation's immigration laws are being misused to craft a system of preventive administrative detention of immigrant men, predominantly of Middle Eastern background. These detentions give rise to imprisonment without charge for weeks and months, denial of access to lawyers, physical and psychological abuse and ultimately deportations without a fair initial hearing or the exhaustion of available appellate recourse. I argue that this expanded use of civil immigration detention is designed to weaken constitutional due process protections, bringing into the U.S. detention tactics adopted abroad under the rubric of the war on terror. This paper also highlights similarities between the evolving administrative detention system in the United States and longer-standing practices in Israel.
Adamu Gayus Kasa, Matthew E. Egharevba and Ajibade E. Jegede
This study aims to investigate the clamour by the people of Plateau State, Nigeria, for more licences to bear firearms for self-defence because of the continuous failure of the…
Abstract
Purpose
This study aims to investigate the clamour by the people of Plateau State, Nigeria, for more licences to bear firearms for self-defence because of the continuous failure of the Nigerian State to defend them against the Fulani herders’ aggression. More guns less crime deterrence theory served as the framework of analysis, which posits that because criminals are rational beings, they will choose not to attack when they know many people have legitimate firearms.
Design/methodology/approach
Data were collected from four purposefully selected local government areas of the state. This study’s sample size was 400. Therefore, 400 copies of the Google Forms questionnaire were administered. In addition, seven key informant interviews and nine focus group discussions were also conducted.
Findings
This research results showed the following: while self-defence and issuance of more licenses were supported by 84.8% and 85.0% of respondents, respectively, they also argued that the insurgency would likely end if more people carried legally acquired firearms. Again, the study showed a positive correlation between the government’s failure in security and the demand for self-defence exercises against the Fulani herdsmen’s insurgency, this study recommends more licensed firearms for the people of Plateau State.
Originality/value
This study recommends more licenced firearms for the people of Plateau State.
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Dennis Gabriel Pepple and Eleanor Davies
As public sector managers implement the policy of employing people that broadly reflects the social make up of a local society, there is a need to ensure that employees have a…
Abstract
Purpose
As public sector managers implement the policy of employing people that broadly reflects the social make up of a local society, there is a need to ensure that employees have a positive perception of ethnic diversity. Perceived environment of ethnic diversity (PEED) is conceptualised as employees’ view of how they are treated at work irrespective of where they come from. The purpose of this paper is to investigate the relationship between PEED and organisational identification (OID).
Design/methodology/approach
Data were collected by means of a survey of 908 employees from four public sector organisations in a state in Nigeria. Regression analysis was used to test the hypotheses.
Findings
Findings showed that OID may be fostered among multi-ethnic employees through the following framework: first, PEED had a direct relationship with OID and support was found, which was explained by the mediating role of co-worker social support (CWSS). Second, the effect of CWSS mediation was moderated by employees’ ethnic self-identification (ESI) such that those with strong ESI experienced lower OID.
Practical implications
As employee compositions in organisations increase in diversity, CWSS is presented in this study as a veritable measure for managers to foster OID.
Originality/value
This study is novel as it is one of the first to examine the mechanisms for linking PEED to OID through mediating effect of CWSS at different levels of ESI. Other contributions are discussed in detail in the study.
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Tony Fang, Morley Gunderson, Viet Ha and Hui Ming
This paper analyzes the differential experiences of women in the Canadian labour market who hold lower-skilled jobs and have school-age children during two waves of Covid compared…
Abstract
Purpose
This paper analyzes the differential experiences of women in the Canadian labour market who hold lower-skilled jobs and have school-age children during two waves of Covid compared with more typical conditions pre-pandemic. The article seeks to test the hypothesis that workers at the intersection of womanhood, motherhood and precarious employment would endure even more disadvantageous labour market outcomes during the Covid pandemic than they did prior to it.
Design/methodology/approach
We employ a Gender-Based Plus (GBA+) and intersectionality lens to examine the differential effect of Covid on the effect of the trifecta of being a woman in a lower-skilled job and facing a motherhood penalty from school-age children. We use a Difference-in-Difference framework with Canadian Labour Force Survey (LFS) data to examine the differential effect of two waves of Covid on three labour market outcomes: employment, hours worked and hourly wages.
Findings
We find that being a woman in a lower-skilled job with school-age children is associated with lower employment, hours worked and wages in normal times compared to males in those same situations. Such women also face the most severe adjustment consequence from the Covid shock, with that adjustment concentrated on the margin of employment and restricted to the First Wave and not the subsequent Omicron Wave.
Originality/value
The paper studies a specific intersectional group, assesses pre-pandemic, peak-pandemic and late-pandemic differences in labour market outcomes and runs separate estimations for different job skill levels. We also study a more comprehensive list of labour market outcomes than most studies of a similar nature.