The Place of Neem among Modern Natural Pesticides

Author(s):  
E. David Morgan
Author(s):  
O. M. Korchazhkina

The article presents a methodological approach to studying iterative processes in the school course of geometry, by the example of constructing a Koch snowflake fractal curve and calculating a few characteristics of it. The interactive creative environment 1C:MathKit is chosen to visualize the method discussed. By performing repetitive constructions and algebraic calculations using ICT tools, students acquire a steady skill of work with geometric objects of various levels of complexity, comprehend the possibilities of mathematical interpretation of iterative processes in practice, and learn how to understand the dialectical unity between finite and infinite parameters of flat geometric figures. When students are getting familiar with such contradictory concepts and categories, that replenishes their experience of worldview comprehension of the subject areas they study through the concept of “big ideas”. The latter allows them to take a fresh look at the processes in the world around. The article is a matter of interest to schoolteachers of computer science and mathematics, as well as university scholars who teach the course “Concepts of modern natural sciences”.


2020 ◽  
Author(s):  
Vadim V. Korolev ◽  
Artem Mitrofanov ◽  
Kirill Karpov ◽  
Valery Tkachenko

The main advantage of modern natural language processing methods is a possibility to turn an amorphous human-readable task into a strict mathematic form. That allows to extract chemical data and insights from articles and to find new semantic relations. We propose a universal engine for processing chemical and biological texts. We successfully tested it on various use-cases and applied to a case of searching a therapeutic agent for a COVID-19 disease by analyzing PubMed archive.


2019 ◽  
Vol 20 (12) ◽  
pp. 1151-1157 ◽  
Author(s):  
Alla P. Toropova ◽  
Andrey A. Toropov

Prediction of physicochemical and biochemical behavior of peptides is an important and attractive task of the modern natural sciences, since these substances have a key role in life processes. The Monte Carlo technique is a possible way to solve the above task. The Monte Carlo method is a tool with different applications relative to the study of peptides: (i) analysis of the 3D configurations (conformers); (ii) establishment of quantitative structure – property / activity relationships (QSPRs/QSARs); and (iii) development of databases on the biopolymers. Current ideas related to application of the Monte Carlo technique for studying peptides and biopolymers have been discussed in this review.


Synthesis ◽  
2021 ◽  
Author(s):  
Dávid Roman ◽  
Maria Sauer ◽  
Christine Beemelmanns

Here, we have summarized more than 30 representative natural product syntheses published in 2015 to 2020 that employ one or more Horner-Wadsworth-Emmons (HWE) reactions. We comprehensively describe the applied phosphonate reagents, HWE reaction conditions and key steps of the total synthetic approaches. Our comprehensive review will support future synthetic approaches and serve as guideline to find the best HWE conditions for the most complicated natural products known


2014 ◽  
Vol 67 (4) ◽  
pp. 414-435 ◽  
Author(s):  
Jennifer A. Herdt

AbstractRecent scholarship has done much to uncover a continuous tradition of distinctively Reformed natural law reflection, according to which knowledge of the natural moral law, though not saving knowledge, is universally available to humanity in its fallen state and makes a stable secular order possible. A close look at Calvin's understanding of natural law, and in particular of conscience and natural human instincts, shows that Calvin himself did not expect the natural law to serve as a source of substantive action-guiding moral norms. First, Calvin held that conscience delivers information concerning the moral quality even of individual actions. But he also thought that we often blind ourselves to the deliverances of conscience. Second, he argued that our natural instincts predispose us to civic order and fair dealing insofar as these are necessary for the natural well-being or advantage of creatures such as ourselves. But he also carefully distinguished the good of advantage from the good of justice or virtue. The modern natural lawyers eroded Calvin's careful distinction between conscience as revealing our duty as duty, and instinct as guiding us towards natural advantage. They also turned away from Calvin's insistence on the moral incapacity of unredeemed humanity. The modern natural lawyers saw their task as one of developing an empirical science of human nature to guide legislation and shape international law, bracketing questions of whether this nature was fallen and in need of redemption. When Scottish Presbyterian Reformed thinkers, such as Gershom Carmichael and John Witherspoon, tried in diverse ways to restore eroded Reformed commitments to the science of human nature, about which they were otherwise so enthusiastic, they were not particularly successful. A science which could derive moral norms from an examination of human instincts, and a conscience which could deliver universal moral knowledge, proved too attractive to decline simply because of the transcendence of God or the fallenness of humankind. Those who wished to preserve an account of natural law which remained faithful to a fully robust set of Reformed theological commitments could do so only by refusing to regard the natural law as a positive source of moral knowledge.


1967 ◽  
Vol 3 (1) ◽  
pp. 67-68
Author(s):  
J. F. Besseling

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