scholarly journals Spherical Cellulose Micro and Nanoparticles: A Review ofRecent Developments and Applications

Nanomaterials ◽  
2021 ◽  
Vol 11 (10) ◽  
pp. 2744
Author(s):  
João P. F. Carvalho ◽  
Ana C. Q. Silva ◽  
Armando J. D. Silvestre ◽  
Carmen S. R. Freire ◽  
Carla Vilela

Cellulose, the most abundant natural polymer, is a versatile polysaccharide that is being exploited to manufacture innovative blends, composites, and hybrid materials in the form of membranes, films, coatings, hydrogels, and foams, as well as particles at the micro and nano scales. The application fields of cellulose micro and nanoparticles run the gamut from medicine, biology, and environment to electronics and energy. In fact, the number of studies dealing with sphere-shaped micro and nanoparticles based exclusively on cellulose (or its derivatives) or cellulose in combination with other molecules and macromolecules has been steadily increasing in the last five years. Hence, there is a clear need for an up-to-date narrative that gathers the latest advances on this research topic. So, the aim of this review is to portray some of the most recent and relevant developments on the use of cellulose to produce spherical micro- and nano-sized particles. An attempt was made to illustrate the present state of affairs in terms of the go-to strategies (e.g., emulsification processes, nanoprecipitation, microfluidics, and other assembly approaches) for the generation of sphere-shaped particles of cellulose and derivatives thereof. A concise description of the application fields of these cellulose-based spherical micro and nanoparticles is also presented.

2020 ◽  
Vol 28 (4) ◽  
pp. 657-676
Author(s):  
Constance Gikonyo

Criminal forfeiture is an asset confiscation mechanism used to seize benefits gained from an offence that one is convicted of. In Kenya, the Proceeds of Crime and Anti-Money Laundering Act provides the facilitating legislation. The present state of the regime's underutilisation prompts an examination of the substantive law and procedure provided in this statute. The analysis indicates that the provisions are technical in nature and the process is systematic. This ensures that a procedurally and substantively fair process is undertaken, in keeping with constitutional provisions. Nonetheless, identified challenges, including the complex nature of the provisions, translate to unclear interpretation and consequently ineffective implementation. This state of affairs is reversible through increased understanding of the criminal forfeiture provisions and their operation. This can potentially lead to an upsurge in its use and facilitate depriving offenders of criminal gains, removing the incentive for crime and reducing proceeds available to fund criminal activities.


Molecules ◽  
2021 ◽  
Vol 26 (20) ◽  
pp. 6315
Author(s):  
Shunli Chu ◽  
Jue Wang ◽  
Fengxiang Gao

Chitosan (CS) is a natural polymer with a positive charge, a deacetylated derivative of chitin. Chitosan nanostructures (nano-CS) have received increasing interest due to their potential applications and remarkable properties. They offer advantages in stomatology due to their excellent biocompatibility, their antibacterial properties, and their biodegradability. Nano-CSs can be applied as drug carriers for soft tissue diseases, bone tissue engineering and dental hard tissue remineralization; furthermore, they have been used in endodontics due to their antibacterial properties; and, finally, nano-CS can improve the adhesion and mechanical properties of dental-restorative materials due to their physical blend and chemical combinations. In this review, recent developments in the application of nano-CS for stomatology are summarized, with an emphasis on nano-CS’s performance characteristics in different application fields. Moreover, the challenges posed by and the future trends in its application are assessed.


Res Publica ◽  
1970 ◽  
Vol 19 (2) ◽  
pp. 247-268
Author(s):  
Léon-Eli Troclet

I . Confronted with the acuteness of the socio-economic problems the two major labour organizations (i.e. : the socialist and the christiandemocratic trade union confederation) have in 1976 strengthened their «Common Trade Unions' Front» (with about two million members on a total of 2,300,000 wage- and salary earners in Belgium) in view of their negotiations with employers and with the government, to which the trade unions have submitted a common platform.The common front, that has its antecedents on the local, regional and professional level has never been and never will be of a permanent nature, some sort of organic unit. Each confederation maintains its own identity and the front is meant to be re-animated according to the circumstances.II. From the employers' side (and to some extent completely independent from the trade unions' common front) representatives of employers' organizations have «as a personal point of view» and, no doubt, as a preliminary approach, launched the idea that a new and very comprehensive «social pact» should be negotiated.  The socialist trade unions clearly tend to reject this idea, since it maywell lead to a further integration in the capitalist system, whereas the christiandemocratic union seems to be rather in favour of such a pact.In the present state of affairs (end of June, 1977) the probability that it be realized is rather low indeed.


This volume asks a question that is deceptive in its simplicity: Could international law have been otherwise? In other words, what were the past possibilities, if any, for a different law? The search for contingency in international law is often motivated, including in the present volume, by the refusal to accept the present state of affairs and by the hope that recovering possibilities of the past will facilitate a different future. The volume situates the search for contingency theoretically and within many fields of international law, such as human rights and armed conflict, migrants and refugees, the sea and natural resources, and foreign investment and trade. Today there is hardly a serious account that would consider the path of international law to be necessary and that would deny the possibility of a different law altogether. At the same time, however, behind every possibility of the past stands a reason – or reasons – why the law developed as it did. Those who embark in search of contingency soon encounter tensions when they want to recover past possibilities without downplaying patterns of determination and domination. Nevertheless, while warring critical sensibilities may point in different directions, only a keen sense of why things turned out the way they did makes it possible to argue about how they could plausibly have turned out differently.


2021 ◽  
pp. 55-71
Author(s):  
Ingo Venzke

One of the main aims of critique is to work towards progressive change. What are critical scholarship’s assumptions about how that change should happen? And do they hold? In the present chapter, I focus on three characteristic traits of critique: seeing law as part of the problem; emphasizing law’s relative indeterminacy; and carving out contingencies in the law’s past. Critique has exposed and countered several dynamics that render the present state of affairs more natural, necessary, and just. Social psychological research has notably drawn attention to people’s longing to live in a world that they consider just—which is a world in which things appear to happen for a reason. Research has further drawn attention to the bias of hindsight and dynamics of ex post rationalization. In short, there are many concerns, tropes, and even vocabularies that are shared between critical legal scholarship and social psychological research. Yet, divides between the two still remain deep.


Author(s):  
Amir Raz ◽  
Sheida Rabipour

“Conclusion: The Case for Brain Training” explores the relative merits and shortcomings of behavioral exercises to preserve, enhance, and restore mental function. It provides the available data and allows the reader to form an educated opinion regarding the present state of affairs and how available interventions may help different crowds.


2017 ◽  
Vol 114 (3) ◽  
pp. 462-465
Author(s):  
Tim Phillips

The church has inherited a conflicted understanding of “city” both from its biblical roots and from its experience in modern America. John’s vision in Revelation could be a window for both resisting a retreat from the city and imagining “city” in new spiritual terms. Much depends on what we think we are looking for. Using reports about the present state of affairs in Detroit as a living commentary on John’s vision of a New Jerusalem, what are the “former things” that have “passed away?” What needs to pass away for imagining a new city—a New Jerusalem? What glimpses are there of that new reality? Adapted from a sermon in 2010, this article attempts to name the questions and to kindle some imagination about a new spirituality for the city.


1873 ◽  
Vol 18 (84) ◽  
pp. 498-521
Author(s):  
W. Lauder Lindsay

Some months ago, in an article on “Colonial Lunacy Boards,” [in the number of the “Edinburgh Medical Journal” for March, 1872,] I had occasion to announce that the New Zealand Government had put upon paper certain “Resolutions”1 regarding Lunacy-Reform in the Colony, including a proposal forthwith to appoint at least one Commissioner in Lunacy, who should act as adviser to Government in all Lunacy matters, as well as supervise all the Lunatic Asylums of the Colony. I expressed a fear that the intentions apparently embodied in the said resolutions were “too good news to be true,” and that they would prove but formal suggestions—to be laid upon the table of the House of Assembly, there to remain [shelved] for an indefinite period, just as similar proposals for Lunacy Reform have been treated in the sister colony of New South Wales. Unfortunately for the insane, and for the Lunatic Hospitals, of New Zealand, my surmises have proved to be only too correct —my fears only too well founded. By the August mail (1872) I received two letters from tne Honourable Dr. Buchanan, of Dunedin, Member of the Legislative Council, and mover of the Parliamentary Resolutions above referred to.2 That the proposals which these resolutions contained, have not yet been adopted, is certainly no fault of his; for of his hearty interest and honest intention in the matter there can be no question. In his letters he gives the following most unsatisfactory account of the present state of affairs in New Zealand in regard to Lunacy Progress or Reform—a state of affairs which I quite agree with him in considering discreditable and disgraceful to its reputation as a British Colony!


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