Covalent Organic Frameworks in Separation

2020 ◽  
Vol 11 (1) ◽  
pp. 131-153
Author(s):  
Saikat Das ◽  
Jie Feng ◽  
Wei Wang
Keyword(s):  
Green Revolution ◽  
Clean Energy ◽  
Chiral Separations ◽  
Porous Polymers ◽  
Future Research ◽  
Covalent Organic Frameworks ◽  
Separation Processes ◽  
Materials Research ◽  
Organic Solvent Nanofiltration ◽  
New Generation

In the wake of sustainable development, materials research is going through a green revolution that is putting energy-efficient and environmentally friendly materials and methods in the limelight. In this quest for greener alternatives, covalent organic frameworks (COFs) have emerged as a new generation of designable crystalline porous polymers for a wide array of clean-energy and environmental applications. In this contribution, we categorically review the merits and shortcomings of COF bulk powders, nanosheets, freestanding thin films/membranes, and membranes on porous supports in various separation processes, including separation of gases, pervaporation, organic solvent nanofiltration, water purification, radionuclide sequestration, and chiral separations, with particular reference to COF material pore size, host–guest interactions, stability, selectivity, and permeability. This review covers the fabrication strategies of nanosheets, films, and membranes, as well as performance parameters, and provides an overview of the separation landscape with COFs in relation to other porous polymers, while seeking to interpret the future research opportunities in this field.

SUMMARY: PAPERS PRESENTED AT INTERNATIONAL WORKSHOP ON INCREASING WHEAT YIELD POTENTIAL, CIMMYT, OBREGON, MEXICO, 20–24 MARCH 2006 Challenges to international wheat improvement

2007 ◽  
Vol 145 (3) ◽  
pp. 223-227 ◽  
Author(s):  
M. P. REYNOLDS ◽  
P. R. HOBBS ◽  
H. J. BRAUN
Keyword(s):  
Management Practices ◽  
International Workshop ◽  
Green Revolution ◽  
Wheat Yield ◽  
Developed Countries ◽  
Yield Potential ◽  
Agronomic Practices ◽  
Agronomic Management ◽  
Genetically Improved ◽  
New Generation

Wheat is grown on 210 million ha throughout the world producing approximately 600 million tonnes of grain (10 year average; FAO 2005) and providing on average one fifth of the total calorific input of the world's population (FAO 2003). For some regions such as North Africa, Turkey and Central Asia, wheat provides half of total dietary energy intake. Of the cultivated wheat area, half is located in less developed countries where there have been steady increases in productivity since the green revolution, associated with genetic improvements in yield potential, resistance to diseases and adaptation to abiotic stresses (Reynolds & Borlaug 2006a, b) as well as better agronomic practices (Derpsch 2005). Nonetheless, challenges to wheat production are still considerable, especially in the developing world, not only because of increased demand but also because of the increased scarcity of water resources (Rosegrant 1997; WMO 1997), ever more unpredictable climates (Fischer et al. 2002), increased urbanization and loss of good quality land away from agriculture (Hobbs 2007), and decreased public sector investment in agriculture and rural affairs (Falcon & Naylor 2005). To meet demand in a sustainable way, more resources are required to breed a new generation of genetically improved cultivars as well as implement resource-conserving agronomic management practices.

Emerging new-generation hybrids based on covalent organic frameworks for industrial applications

2021 ◽  
Vol 45 (16) ◽  
pp. 7014-7046
Author(s):  
Shadpour Mallakpour ◽  
Elham Azadi ◽  
Chaudhery Mustansar Hussain
Keyword(s):  
Industrial Applications ◽  
Covalent Organic Frameworks ◽  
New Generation

This review highlights the advancement of COF hybrid-based materials for diverse industrial applications.

scholarly journals The Issues and Challenges Faced by Malay Cuisine in the Foreign Market

2021 ◽  
Vol 16 (2) ◽  
pp. 20-28
Author(s):  
Rahman Abdullah ◽  
Aniza Arifin ◽  
Azlina Samsudin ◽  
Sabaianah Bachok ◽  
Harnizam Zahari
Keyword(s):  
Cultural Heritage ◽  
Success Factors ◽  
Raw Materials ◽  
Country Of Origin ◽  
Foreign Market ◽  
Future Research ◽  
Traditional Food ◽  
Meal Preparation ◽  
New Generation

The traditional food of a culture in a society is continuously inherited from the old generation to the new generation. The traditional element is an in-depth understanding of the function of each material, techniques of preparation, and the practice in our daily cooking. This understanding in the form of preparation, meal preparation, tips, use of certain equipment, and raw materials are mysteries difficult to be unravelled. The Malay cultural heritage food is an integral asset among Malaysians in general and the Malay race in particular. Malay cuisine is one of the special and unique blended of many traditions from around the region. However, when Malay culture and cuisine are introduced to other countries, they faced certain hurdles and challenges. This study investigates the issues and challenges faced by Malay cuisine in the foreign market. The points in question are, 1) Why are Malay cuisine difficult to be exported to other countries 2) Why Malay cuisine is less popular than cuisines from other countries? 3) What are the factors that make foods from a country of origin can be successfully exported? These issues and challenges will be parsed and discussed based on the existing written collection. Recommendations will be made on the mechanisms that enable the success of Malay cuisine food to be commercialized abroad, as well as future research examining the success factors of traditional food exported abroad.  

Giving negative feedback to Millennials

2016 ◽  
Vol 39 (6) ◽  
pp. 692-705 ◽  
Author(s):  
Emylee Anderson ◽  
Aaron A. Buchko ◽  
Kathleen J. Buchko
Keyword(s):  
Negative Feedback ◽  
Millennial Generation ◽  
Management Practice ◽  
Baby Boom ◽  
Demographic Data ◽  
Specific Area ◽  
Future Research ◽  
Content Type ◽  
Managerial Practices ◽  
New Generation

Purpose Demographic data indicate that the Millennial generation (those born between 1982 and the early 2000s) are entering the workforce and will become an increasingly significant component of the workforce in the near future. The Millennial generation appears to have significant differences in values, attitudes and expectations regarding work than prior generations. Design/methodology/approach The authors reviewed the literature on the “Millennial” generation (those born between 1982 and the early 2000s) and the research on giving negative feedback to identify issues that are significant with respect to the manner in which managers give negative information to this new generation of workers. Findings To be effective, negative feedback to Millennials needs to be consistent and ongoing. The feedback must be perceived by Millennials as benefitting them now or in the future. Managers must be assertive enough to make sure the employee understands the concerns, but sensitive to the fact that many Millennials have difficulty accepting such feedback. Research limitations/implications These findings offer suggestions for future research that needs to explicitly examine the differences in the new generation of workers and how these persons respond to current managerial practices. Practical implications Millennials are now entering the workforce in significant numbers. Managers will find increasing opportunities to address the organizational and individual needs of these workers. Managers must learn how to effectively direct and motivate this generation of workers, including how to provide constructive negative feedback. Social implications Demographic data indicate that the so-called “Baby Boom” generation will be leaving the workforce in large numbers over the next few years, and will be replaced by the Millennial generation. Originality/value To date, there has been little attempt by management researchers to address the organizational implications of the generational shift that is occurring. We seek to draw attention to one specific area of management practice – delivering negative feedback – and explore how the knowledge may be changing as a new generation of workers enter the workplace.

Emerging new-generation covalent organic frameworks composites as green catalysts: design, synthesis and solar to fuel production

2022 ◽  
pp. 134594
Author(s):  
Shilpa Patial ◽  
Pankaj Raizada ◽  
Aftab Aslam Parwaz Khan ◽  
Arachana Singh ◽  
Quyet Van Le ◽  
...  
Keyword(s):  
Covalent Organic Frameworks ◽  
Fuel Production ◽  
Design Synthesis ◽  
New Generation

Robotics and Multimodal Biometrics

2013 ◽  
pp. 113-129
Keyword(s):  
Virtual Reality ◽  
Virtual Worlds ◽  
Identity Management ◽  
Future Research ◽  
Multimodal System ◽  
Security Research ◽  
University Of Louisville ◽  
Behavioral Profiling ◽  
Biological Entities ◽  
New Generation

This chapter presents a review on a new subfield of security research which transforms and expands the domain of biometrics beyond biological entities to include virtual reality entities, such as avatars, which are rapidly becoming a part of society. Artimetrics research at Cybersecurity Lab, University of Louisville, USA, and Biometric Technologies Lab, University of Calgary, Canada, builds on and expands such diverse fields of science as forensics, robotics, virtual worlds, computer graphics, biometrics, and security. Analyzing the visual properties and behavioral profiling can ensure verification and recognition of avatars. This chapter introduces a multimodal system for artificial entities recognition, simultaneously profiling multiple independent physical and behavioral characteristic of an entity, and creating a new generation multimodal system capable of authenticating both biological (human being) and non-biological (avatars) entities. At the end, this chapter focuses on some future research directions by discussing robotic biometrics beyond images and text-based communication to intelligent software agents that can emulate human intelligence. As artificial intelligence and virtual reality domains evolve, they will in turn give rise to new generation security solutions to identity management spanning both human and artificial entity worlds.

scholarly journals What Happens after the Rare Earth Crisis: A Systematic Literature Review

2019 ◽  
Vol 11 (5) ◽  
pp. 1288 ◽  
Author(s):  
Yufeng Chen ◽  
Biao Zheng
Keyword(s):  
Rare Earth ◽  
Literature Review ◽  
Relevant Literature ◽  
Clean Energy ◽  
Economic Research ◽  
Research Trend ◽  
Future Research ◽  
China National Knowledge Infrastructure ◽  
Scientific Publications ◽  
The Rare Earth

Rare earths (REs) play an important role in modern life, and have been the focus of global attention in recent years. As a result, the number of scientific publications has grown enormously, increasing the need for understanding the knowledge base of various research streams and their emerging branches. The economic analysis of REs has also augmented steadily. Nevertheless, the relevant literature is rather fragmented concerning the thematic topics. To respond to this, a systematic review in accordance with the Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) and a bibliometric analysis were developed to offer a systematic and holistic literature review of the economic research on REs. This review incorporates studies of REs regarding aspects of supply, price, export policy, international trade, relationship with clean energy, and sustainability. The database of this review includes a set of 85 systemically selected state-of-the-art articles from five databases, including Web of Science, Science Direct, Springer, Proquest, and China National Knowledge Infrastructure (CNKI) that were published after the rare earth crisis, covering empirical and theory research conducted in different countries with different resource endowments. The results show that the majority of the economic research studies have been conducted in the past six years. Furthermore, among the six categories, the most popular research trend is sustainability. Some possible opportunities for future research are also illustrated in this paper.

Mechanical Analysis of Functionally Graded Porous Structures: A Review

2020 ◽  
Vol 20 (13) ◽  
pp. 2041015
Author(s):  
Helong Wu ◽  
Jie Yang ◽  
Sritawat Kitipornchai
Keyword(s):  
Porous Materials ◽  
Material Properties ◽  
Mechanical Analysis ◽  
Functionally Graded ◽  
Future Research ◽  
Spatial Gradient ◽  
Porous Structures ◽  
Research Activities ◽  
Key Factor ◽  
New Generation

Functionally graded porous structures (FGPSs), characterized by a continuous spatial gradient in both porosity and material properties, have been considered as the new generation lightweight structures. Research activities on FGPSs have grown rapidly in recent years. This paper is devoted to review the existing research works on FGPSs and to highlight the important advances in this emerging area. It consists of: (i) a brief introduction of porous materials and Functionally graded porous materials (FGPMs); (ii) an elaboration of the key factor and micromechanical models related to material properties of FGPMs; (iii) a comprehensive review of mechanical analysis of FGPSs; (iv) a detailed discussion of the main challenges and future research directions; (v) a conclusion.

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