scholarly journals THE WAY OF DEVELOPMENT OF NATURAL LINTISITE FROM A MINERAL TO ITS SYNTHETIC ANALOGUE: USEFUL PROPERTIES, POTENTIAL AREAS OF PRACTICAL APPLICATION

2021 ◽  
Vol 13 (2-2021) ◽  
pp. 7-16
Author(s):  
G.O. Kalashnikova ◽  
◽  
V.N. Yakovenchuk ◽  
E.A. Selivanova ◽  
Ya.A. Pakhomovsky ◽  
...  

The article presents a general description of lintisite – a rare mineral of the Khibiny and Lovozersky alkaline massifs. The mineral is considered as a base for the creation of a number of new interesting and useful substances for the modern science of materials. The characteristics of a natural sample are compared with its synthetic analogue AM-4. Examples of potential applications of AM-4 and its new form as the "nano-scale puzzle" for the field of organic synthesis are given. Different methods of AM-4 granulation are shown. The text is presented as a science fiction in order to attract the interest of people to the publication.

2016 ◽  
Vol 17 (3) ◽  
pp. 251-267 ◽  
Author(s):  
Ingvil Hellstrand

This article explores how issues of ‘not quite human-ness’ expose the conditions of possibility of being considered human; of human ontology. I refer to these dynamics for identifying sameness and difference as ontological politics of recognition. Tracing the genealogies of passing, I situate passing and Othering socio-political regulation and ideological frameworks for conceptualising ontology. I am particularly concerned with how the notion of ontology is bound up in questions of race and gender, and with the entanglements of technology and biology that can destabilise apparently fixed boundaries between the (natural/normative) human and its (constructed/abnormal) Others. I identify three trajectories of passing as human in the histories of science fiction. The first trajectory discusses ontological mimicry: the ways in which the non-human attempts to be like the human. The second trajectory addresses how passing as human relies on a Butlerian performativity: doing human-ness by complying with the regulatory frames for appearances and practices. The final trajectory discusses what is at stake in contemporary ontological politics of recognition: a renegotiation of human supremacy through an emphasis on collectivity and collaboration rather that singularity and boundedness.


2021 ◽  

Mary Wollstonecraft Shelley conceived of the central idea for Frankenstein; or, the Modern Prometheus—most often referred to simply as Frankenstein—during the summer of 1816 while vacationing on Lake Geneva in Switzerland. It is her first and most famous novel. Although the assertion is debatable, some scholars have argued that Frankenstein is the first work of modern science fiction. Shelley was inspired to write Frankenstein in response to a “ghost story” writing contest between herself, Percy Shelley, Percy Shelley’s physician and friend John Polidori, and Lord Byron, who were trapped indoors reading German ghost stories as the result of inclement weather. Polidori’s contribution to this contest, “The Vampyre: A Tale” (1819), influenced the development of Gothic literature. According to Shelley, she drew inspiration from a nightmare she had, which she attributed to discussions she overheard between Percy and Byron regarding experiments with electricity and animation. Shelley began working on the novel when she returned home to England in September, and the book’s first edition was published anonymously in 1818. Shelley’s father William Godwin made minor revisions for a second edition in 1821; and Shelley herself made more substantial changes for the third edition in 1831. The story is told through an epistolary frame, and follows Victor Frankenstein, a university student of the “unhallowed arts” who assembles, animates, and abandons an unnamed human-like creature. The creature goes on to haunt his creator both literally and metaphorically. Over the past two hundred years, the story has been widely influential, and re-interpreted in various forms of culture and media. In literary studies, scholars have discussed which edition of the text is the “truest” to Mary Shelley’s intended vision. The novel has been analyzed for its messages about human pride and hubris, the pursuit of knowledge, the nature/nurture question, as put forth by Rousseau, ethical questions in medicine and science, and family, gender, and reproduction, among other topics.


Author(s):  
Vincenzo Ferrone

This chapter examines the change in science's image and the revelation of the philosophers of science's so-called epistemologia imaginabilis in the context of eighteenth-century science and philosophy. Many eminent scholars, from Thomas Hobbes to Denis Diderot, have engaged in the epistemological debate over extending the methods of the natural sciences to the study of human experience. The idea of the unity of knowledge across all disciplines on the basis of scientific methodology reached its peak with Immanuel Kant. Among the great historians, Marc Bloch was the one who best understood the role that a radically new conception of science could play in redefining and reviving the legitimacy of historical knowledge. The chapter considers the intense intellectual debate between historians of science and philosophers of science on the foundations of knowledge and how modern science acquired definitive legitimacy as a new form of knowledge over the course of the eighteenth century.


Author(s):  
Yong-Yi Wang ◽  
Ming Liu ◽  
David Horsley

It has been known since the 1960’s that the crack-tip fields of specimens containing sharp cracks depend on the mode of loading. Experimental evidence has shown that cracked specimens loaded in bending have lower toughness than the same material loaded in tension. This phenomenon has been attributed to the “constraint effect” on fracture. Modern constraint-sensitive fracture mechanics has brought about fundamental theoretical understandings on the constraint effects. The constraint-sensitive fracture mechanics has moved from academic circles to practical application, as evident by a number of recently published fitness-for-service (FFS) assessment procedures that incorporates the constraint effects. This paper reviews the developments in constraint-sensitive fracture mechanics with the focus on its potential applications to the assessment of pipeline girth weld integrity. The review covers (1) constraint theories and experimental evidences, (2) constraint models for brittle and ductile fracture, and (3) limitations of current constraint models. The paper closes with thoughts on the applications of the constraint models and theories to ductile fracture processes, which are the most relevant to modern linepipes and their welds.


Synlett ◽  
2019 ◽  
Vol 30 (17) ◽  
pp. 1954-1965 ◽  
Author(s):  
Tristan H. Lambert

Carbonyl-olefin metathesis is a potentially powerful yet underexplored reaction in organic synthesis. In recent years, however, this situation has begun to change, most notably with the introduction of several different catalytic technologies. The development of one of those new strategies, based on hydrazine catalysts and a novel [3+2] paradigm for double bond metathesis, is discussed herein. First, the stage is set with a description of some potential applications of carbonyl-olefin metathesis and a discussion of alternative strategies for this intriguing reaction.1 Introduction2 Potential Applications of Carbonyl-Olefin Metathesis3 Carbonyl-Olefin Metathesis Strategies4 Direct (Type I): Non-Catalytic5 Direct (Type I): Acid-Catalyzed6 Indirect (Type II): Metal Alkylidenes7 Indirect (Type III): Hydrazine-Catalyzed8 Conclusion


Chemosensors ◽  
2018 ◽  
Vol 6 (4) ◽  
pp. 46 ◽  
Author(s):  
Ishtiaq Ahmed ◽  
Zain Akram ◽  
Mohammed Bule ◽  
Hafiz Iqbal

A micro-level technique so-called “microfluidic technology or simply microfluidic” has gained a special place as a powerful tool in bioengineering and biomedical engineering research due to its core advantages in modern science and engineering. Microfluidic technology has played a substantial role in numerous applications with special reference to bioscience, biomedical and biotechnological research. It has facilitated noteworthy development in various sectors of bio-research and upsurges the efficacy of research at the molecular level, in recent years. Microfluidic technology can manipulate sample volumes with precise control outside cellular microenvironment, at micro-level. Thus, enable the reduction of discrepancies between in vivo and in vitro environments and reduce the overall reaction time and cost. In this review, we discuss various integrations of microfluidic technologies into biotechnology and its paradigmatic significance in bio-research, supporting mechanical and chemical in vitro cellular microenvironment. Furthermore, specific innovations related to the application of microfluidics to advance microbial life, solitary and co-cultures along with a multiple-type cell culturing, cellular communications, cellular interactions, and population dynamics are also discussed.


2019 ◽  
Vol 9 (5) ◽  
pp. 437-443 ◽  
Author(s):  
Jiaxin Li ◽  
Zhi Chen ◽  
Jianfei Fang ◽  
Qian Yang ◽  
Xiuru Yang ◽  
...  

Photocatalysis is one of the efficient approaches for pollution control in water. However, the traditional photocatalysts used for the removal of organic pollutants are in powder form, which makes it difficult to recover them from the suspended reaction system. On the contrary, thin film photocatalyst is easy to be retrieved and possesses unique feature for practical application. In present work, stable TiO2 sol suspension was prepared and amorphous TiO2 thin film was then immobilized upon glass substrate through facile spin coating method. The thickness of film could be simply controlled by changing the number of coatings, and anatase TiO2 film could be formed after calcination. The prepared thin films were characterized with X-ray diffraction (XRD), ultravioletvisible spectrophotometry (UV-vis), scanning electron microscopy (SEM) and atomic force microscopy (AFM). The photodegradations of organic pollutants including colored dye and colorless antibiotic were tested and found to be thickness-dependent. Additionally, the prepared film photocatalst has good stability and may have potential applications in wastewater treatment.


1991 ◽  
Vol 249 ◽  
Author(s):  
A. Kilian ◽  
L. Reinhart ◽  
A. Davis ◽  
T.F. Morse ◽  
D.C. Paine

ABSTRACTIn this paper we report a new approach to the problem of high rate formation of nanophase powders. In our experiments we were able to make aluminum oxide particles in the size range from 5 to 140 nm (peaking sharply at 35 nm) at a rate of 3 g/min. The starting material was a mixture of aluminum-tri-sec-butoxide and sec-butanol. An aerosol was made from this solution and subsequently burned in a special torch, described below. The resulting particles were spherical and no necked regions were observable between them. In a practical application, our technique allows a large production rate while still approaching the ideal of nano-scale monodispersed particles. The work was extended to the formation of zirconium oxide particles with quite similar results in the size distribution.


Sign in / Sign up

Export Citation Format

Share Document