scholarly journals Biotechnology for the Treatment of Pesticide Waste

HortScience ◽  
1996 ◽  
Vol 31 (4) ◽  
pp. 699c-699
Author(s):  
Jeffrey S. Karns
Keyword(s):  
Complex Mixture ◽  
Cost Effective ◽  
High Volume ◽  
Organophosphate Insecticide ◽  
The Past ◽  
Different Types ◽  
Number Of Microorganisms ◽  
Parathion Hydrolase ◽  
Multiple Treatments ◽  
The Many

The use of microbes and/or microbial processes for the bioremediation of soils contaminated with pesticides is an idea that has enjoyed considerable interest over the past several years. Many microbes with specific pathways for the degradation of particular pesticides, or classes of pesticide, have been isolated and characterized. Unfortunately, most sites that are heavily contaminated with pesticides contain a mixture of the many different types of pesticides that have been used over the last 5 decades. This complex mixture of compounds may inhibit microbial degradation or may require multiple treatments to assure that all the chemicals are degraded. Treatment of wastes before they contaminate the environment is one way to avoid the problems associated with mixed wastes. We have isolated a number of microorganisms that detoxify insecticides, such as carbaryl of parathion via the action of hydrolase enzymes. These enzymes can be used to treat waste pesticide solutions before disposal. A system was developed for the disposal of one high-volume organophosphate insecticide waste by treatment with parathion hydrolase, followed by ozonation to yield harmless products that were readily degraded by other soil microorganisms. A second method for disposal of this waste involves altering the environmental conditions in the waste to stimulate the growth of microorganisms naturally present in the material utilizing the pesticide as a carbon source. This accomplishes degradation of the material over a 2-week period. Many, if not all, pesticides are degradable to some degree by microorganisms, and this fact can be exploited to provide cost-effective methods for the safe disposal of pesticide wastes.

2 The Types of Evidence for Prehistoric Southwestern Agriculture

1961 ◽  
Vol 17 ◽  
pp. 8-10
Author(s):  
Richard B. Woodbury
Keyword(s):  
Critical Reading ◽  
Pueblo Indians ◽  
Prehistoric Agriculture ◽  
The Past ◽  
Careful Scrutiny ◽  
Different Types ◽  
The Many ◽  
Major Emphasis

Over the past decade many authors have briefly cited or discussed several kinds of evidence for the prehistoric agriculture of the Southwest. Most of this evidence, however, has not received careful scrutiny, nor has it been given major emphasis in any but a few archaeological studies. The importance of agriculture has been more often assumed than demonstrated, and a critical reading of Southwestern archaeological literature reveals that all too often reference to “agriculture” (or “horticulture“) is unaccompanied by any consideration of the many different types of activity that are subsumed by such a term.From the earliest days of exploration among the “cliff-dwellings” and other ruins the presence of stored corn made it clear that the occupants had been farmers. Other evidence seemed superfluous, since the surviving Pueblo Indians were also farmers, and it could be assumed that farming methods had changed but little over the centuries. Therefore, none of the earlier archaeologists in the Southwest gave serious attention to the agricultural evidence.

scholarly journals The Present State of the Study of Politics

2021 ◽  
Vol 100 (1) ◽  
pp. 183-192
Author(s):  
Ch. E. Merriam
Keyword(s):  
Industrial Development ◽  
Political Process ◽  
Law School ◽  
The Political ◽  
Common Goal ◽  
The Past ◽  
Different Types ◽  
The Subject ◽  
The Many ◽  
The Impact

The original outline of this article included a general overview and critique of the leading trends in the study of politics over the past 30 to 40 years. It was intended to compare the methods and results of different types of political thought-to consider in turn the historical school, the law school, researchers in the field of comparative analysis of forms of government, philosophers themselves, the approach of economists, the contribution of geographers and ethnologists, the work of statisticians, and finally to turn to psychological, sociological and biological interpretations of the political process. It would be an interesting and perhaps useful task to compare the subject and method of such thinkers as Jellinek, Gierke, Dugi, Dicey and Pound, the philosophies of Sorel and Dewey, Ritchie and Russell, Nietzsche and Tolstoy, to look at the methods of Durkheim and Simmel, Ward, Giddings and Small, Cooley and Ross, and to discuss the innovations found in the works of Wallace and Cole. It might be useful to expand the analysis to include important features of the environment in which these ideas flourished, and the many close connections between them. One could also discuss the impact of social and industrial development, class movements and class struggle or group conflicts in a broader sense, consider the impact of urbanism and industrialism, capitalism, socialism and syndicalism, militarism, pacifism, feminism, nationalism. It would be useful, perhaps, to present a critique of the methods and results described and to specifically assess the significance of logical, psychological, sociological, legal, philosophical and historical methodologies and the contribution of each of them to the study of the political. This task, however, was dropped and postponed for the next time, as it became apparent that no such review could be compressed to reasonable volumes. In order to achieve our common goal, it would seem that a different type of analysis would be more productive, aimed at reconstructing the methods of political research and obtaining more extensive results in both the theoretical and practical fields.

scholarly journals Non-Precious Metal Graphene-Based Catalysts for Hydrogen Evolution Reaction

Electrochem ◽  
2020 ◽  
Vol 1 (2) ◽  
pp. 75-86 ◽  
Author(s):  
Maximina Luis-Sunga ◽  
Lana Regent ◽  
Elena Pastor ◽  
Gonzalo García
Keyword(s):  
Hydrogen Evolution ◽  
Hydrogen Evolution Reaction ◽  
Precious Metal ◽  
Large Scale ◽  
Renewable Energy Sources ◽  
Cost Effective ◽  
Clean Energy ◽  
Mass Energy ◽  
The Past ◽  
The Many

Developing sustainable and renewable energy sources is critical as higher and higher global energy and environmental challenges arise. Hydrogen has the highest mass/energy density of any fuel and is considered one of the best sources of clean energy. Water splitting is regarded as one of the most promising solutions for hydrogen production on a large scale. Highly efficient, durable, and cost-effective catalysts for hydrogen evolution reaction (HER) are critical in the realization of this goal. Among the many materials proposed, graphene-based materials offer some unique properties for HER catalysis. In this review, we present recent progress on development of graphene-based electrocatalysts toward HER throughout the past few years.

Theories of Choice and the Law—An Introduction

2021 ◽  
pp. 1-16
Author(s):  
Stefan Grundmann ◽  
Philipp Hacker
Keyword(s):  
The Past ◽  
Legal Problems ◽  
Different Types ◽  
The Law ◽  
The Many

This introduction highlights the importance of theories of choice for the law, but it also stresses the need to distinguish and decide between different types of choice theories for concrete legal applications. It first discusses the problem of selecting an appropriate theory of choice, from the many varieties that have developed in the past decades, for a specific regulatory problem. Second, it advocates making explicit the sometimes hidden epistemic and normative assumptions behind choice-theoretic models. Third, it argues for a genuinely normative assessment, and a conceptual reconstruction, of theories of choice before their application to specific legal problems. The chapter concludes with an overview of the four Parts of this volume.

Study of the Molecular Architecture of Keratin Filaments by Electron Microscopy

1982 ◽  
Vol 40 ◽  
pp. 118-119
Author(s):  
U. Aebi ◽  
P. Rew ◽  
T.-T. Sun
Keyword(s):  
Electron Microscopy ◽  
Structural Organization ◽  
Cell Types ◽  
Structural Features ◽  
Molecular Architecture ◽  
The Past ◽  
Keratin Filaments ◽  
Different Types ◽  
10 Nm Filaments ◽  
Different Cell Types

Various types of intermediate-sized (10-nm) filaments have been found and described in many different cell types during the past few years. Despite the differences in the chemical composition among the different types of filaments, they all yield common structural features: they are usually up to several microns long and have a diameter of 7 to 10 nm; there is evidence that they are made of several 2 to 3.5 nm wide protofilaments which are helically wound around each other; the secondary structure of the polypeptides constituting the filaments is rich in ∞-helix. However a detailed description of their structural organization is lacking to date.

On Future Directions in Pathology

1982 ◽  
Vol 40 ◽  
pp. 274-277
Author(s):  
Benjamin F. Trump ◽  
Irene K. Berezesky ◽  
Raymond T. Jones
Keyword(s):  
Electron Microscopy ◽  
Transmission Electron Microscopy ◽  
Clinical Pathology ◽  
Future Directions ◽  
Diagnostic Pathology ◽  
The Past ◽  
Transmission Electron ◽  
Organ Systems ◽  
The Many

The role of electron microscopy and associated techniques is assured in diagnostic pathology. At the present time, most of the progress has been made on tissues examined by transmission electron microscopy (TEM) and correlated with light microscopy (LM) and by cytochemistry using both plastic and paraffin-embedded materials. As mentioned elsewhere in this symposium, this has revolutionized many fields of pathology including diagnostic, anatomic and clinical pathology. It began with the kidney; however, it has now been extended to most other organ systems and to tumor diagnosis in general. The results of the past few years tend to indicate the future directions and needs of this expanding field. Now, in addition to routine EM, pathologists have access to the many newly developed methods and instruments mentioned below which should aid considerably not only in diagnostic pathology but in investigative pathology as well.

A 200-Year History of the Study of Childhood Language Disorders of Unknown Origin: Changes in Terminology

2020 ◽  
Vol 5 (1) ◽  
pp. 6-11 ◽  
Author(s):  
Laurence B. Leonard
Keyword(s):  
Language Impairment ◽  
Specific Language Impairment ◽  
Scientific Literature ◽  
Language Disorder ◽  
Language Disorders ◽  
Unknown Origin ◽  
Developmental Language Disorder ◽  
The Past ◽  
History Of ◽  
The Many

Purpose The current “specific language impairment” and “developmental language disorder” discussion might lead to important changes in how we refer to children with language disorders of unknown origin. The field has seen other changes in terminology. This article reviews many of these changes. Method A literature review of previous clinical labels was conducted, and possible reasons for the changes in labels were identified. Results References to children with significant yet unexplained deficits in language ability have been part of the scientific literature since, at least, the early 1800s. Terms have changed from those with a neurological emphasis to those that do not imply a cause for the language disorder. Diagnostic criteria have become more explicit but have become, at certain points, too narrow to represent the wider range of children with language disorders of unknown origin. Conclusions The field was not well served by the many changes in terminology that have transpired in the past. A new label at this point must be accompanied by strong efforts to recruit its adoption by clinical speech-language pathologists and the general public.

Regulatory and sustainability initiatives lead to improved polyaminopolyamide epichlorohydrin (PAE) wet-strength resins and paper products

TAPPI Journal ◽  
2018 ◽  
Vol 17 (09) ◽  
pp. 519-532 ◽  
Author(s):  
Mark Crisp ◽  
Richard Riehle
Keyword(s):  
Health And Safety ◽  
Cost Effective ◽  
Worker Safety ◽  
Regulatory Requirements ◽  
Wet Strength ◽  
The Past ◽  
Consumer Safety ◽  
Federal Institute ◽  
Sustainability Initiatives ◽  
The Impact

Polyaminopolyamide-epichlorohydrin (PAE) resins are the predominant commercial products used to manufacture wet-strengthened paper products for grades requiring wet-strength permanence. Since their development in the late 1950s, the first generation (G1) resins have proven to be one of the most cost-effective technologies available to provide wet strength to paper. Throughout the past three decades, regulatory directives and sustainability initiatives from various organizations have driven the development of cleaner and safer PAE resins and paper products. Early efforts in this area focused on improving worker safety and reducing the impact of PAE resins on the environment. These efforts led to the development of resins containing significantly reduced levels of 1,3-dichloro-2-propanol (1,3-DCP) and 3-monochloropropane-1,2-diol (3-MCPD), potentially carcinogenic byproducts formed during the manufacturing process of PAE resins. As the levels of these byproducts decreased, the environmental, health, and safety (EH&S) profile of PAE resins and paper products improved. Recent initiatives from major retailers are focusing on product ingredient transparency and quality, thus encouraging the development of safer product formulations while maintaining performance. PAE resin research over the past 20 years has been directed toward regulatory requirements to improve consumer safety and minimize exposure to potentially carcinogenic materials found in various paper products. One of the best known regulatory requirements is the recommendations of the German Federal Institute for Risk Assessment (BfR), which defines the levels of 1,3-DCP and 3-MCPD that can be extracted by water from various food contact grades of paper. These criteria led to the development of third generation (G3) products that contain very low levels of 1,3-DCP (typically <10 parts per million in the as-received/delivered resin). This paper outlines the PAE resin chemical contributors to adsorbable organic halogens and 3-MCPD in paper and provides recommendations for the use of each PAE resin product generation (G1, G1.5, G2, G2.5, and G3).

The Many Pasts of Detective Fiction

2020 ◽  
Vol 1 (2) ◽  
pp. 157-172
Author(s):  
Thomas Leitch
Keyword(s):  
Detective Fiction ◽  
Golden Age ◽  
Public History ◽  
Detective Novel ◽  
Sherlock Holmes ◽  
Detective Story ◽  
The Past ◽  
Wide Range ◽  
Detective Novels ◽  
The Many

Building on Tzvetan Todorov's observation that the detective novel ‘contains not one but two stories: the story of the crime and the story of the investigation’, this essay argues that detective novels display a remarkably wide range of attitudes toward the several pasts they represent: the pasts of the crime, the community, the criminal, the detective, and public history. It traces a series of defining shifts in these attitudes through the evolution of five distinct subgenres of detective fiction: exploits of a Great Detective like Sherlock Holmes, Golden Age whodunits that pose as intellectual puzzles to be solved, hardboiled stories that invoke a distant past that the present both breaks with and echoes, police procedurals that unfold in an indefinitely extended present, and historical mysteries that nostalgically fetishize the past. It concludes with a brief consideration of genre readers’ own ambivalent phenomenological investment in the past, present, and future each detective story projects.

Sam Domains in Multiple Diseases

2020 ◽  
Vol 27 (3) ◽  
pp. 450-476 ◽  
Author(s):  
Marian Vincenzi ◽  
Flavia Anna Mercurio ◽  
Marilisa Leone
Keyword(s):  
Disease Onset ◽  
Protein Domain ◽  
Sam Domain ◽  
Different Types ◽  
Protein Functions ◽  
Helical Protein ◽  
The Many ◽  
Novel Therapeutic Strategies ◽  
Novel Drug ◽  
Pathological Event

Background: The sterile alpha motif (Sam) domain is a small helical protein module, able to undergo homo- and hetero-oligomerization, as well as polymerization, thus forming different types of protein architectures. A few Sam domains are involved in pathological processes and consequently, they represent valuable targets for the development of new potential therapeutic routes. This study intends to collect state-of-the-art knowledge on the different modes by which Sam domains can favor disease onset and progression. Methods: This review was build up by searching throughout the literature, for: a) the structural properties of Sam domains, b) interactions mediated by a Sam module, c) presence of a Sam domain in proteins relevant for a specific disease. Results: Sam domains appear crucial in many diseases including cancer, renal disorders, cataracts. Often pathologies are linked to mutations directly positioned in the Sam domains that alter their stability and/or affect interactions that are crucial for proper protein functions. In only a few diseases, the Sam motif plays a kind of "side role" and cooperates to the pathological event by enhancing the action of a different protein domain. Conclusion: Considering the many roles of the Sam domain into a significant variety of diseases, more efforts and novel drug discovery campaigns need to be engaged to find out small molecules and/or peptides targeting Sam domains. Such compounds may represent the pillars on which to build novel therapeutic strategies to cure different pathologies.

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