New Development in Rubber Reclaiming

1941 ◽  
Vol 14 (3) ◽  
pp. 717-723
Author(s):  
W. G. Essex
Keyword(s):  
Carbon Black ◽  
Milling Time ◽  
Steam Pressure ◽  
Raw Material ◽  
Manufacturing Cost ◽  
Pneumatic Motor ◽  
Vulcanized Rubber ◽  
New Development ◽  
History Of ◽  
Free Sulfur

Abstract The history of rubber reclaiming has been given by Alexander, and it is therefore intended only to make a brief reference to the well-known acid and alkali processes, the latter having proved to be by far the most successful method of reclaiming vulcanized rubber. The alkali process, introduced by Marks in 1899 had the outstanding advantage of simultaneously removing, from the waste, free sulfur, of which from 3 to 5 per cent was present, of destroying the fabric and of plasticizing the waste, this being accomplished by heating in a closed vessel under steam pressure with caustic soda. The acid process destroyed only the fabric, and plasticization by heat was performed in another operation in a separate vessel: by this method little or no free sulfur was removed from the waste. This latter disadvantage has since disappeared, for, with modern rubber compounding, there is little free sulfur left in vulcanized rubber. In recent years there have been widespread changes in the manufacture of rubber goods, particularly in the case of pneumatic motor tires, which are now the main source of raw material for reclaimed rubber. Organic accelerators, anti-oxidants and carbon black have made vulcanized rubber a very tough, resilient article, extremely resistant to aging and to heat, one of the chief agents used in rubber reclaiming. For example, modern motor tire treads, which are heavily reinforced with carbon black, are not so amenable to alkali and heat treatment, and tire treads reclaimed by this process have finally to be plasticized and made homogeneous by a much longer mechanical milling and refining treatment than was formerly necessary; in spite of this the treads still produce a proportion of rough, unrefinable material which has to be separated and rejected from the final reclaim. This increase in milling time, combined with lower finished production due to rejected unrefinable material, has had the effect of greatly increasing the manufacturing cost of the reclaim. Research was therefore started with the object of evolving a process which would successfully offset these difficulties caused by the changes in the properties and characteristics of the initial waste. The result of this work has been the creation of reclaimed rubber from which the disadvantages mentioned have been largely eliminated.

scholarly journals Indian Active Pharmaceutical Ingredient (API) Industry- An overview on Challenges, Opportunities & Regulatory prerequisites

2021 ◽  
Vol 9 (2) ◽  
pp. 66-76
Author(s):  
Shefali Singh ◽  
Harvinder Popli
Keyword(s):  
Raw Materials ◽  
Pharmaceutical Medicine ◽  
Active Pharmaceutical Ingredient ◽  
Point Of View ◽  
Raw Material ◽  
Manufacturing Cost ◽  
Active Pharmaceutical Ingredients ◽  
Pharmaceutical Ingredients ◽  
Self Sufficiency ◽  
History Of

Active pharmaceutical ingredient is a chemical compound which is most important raw material to formulate a finished pharmaceutical medicine and has a pharmacological effect.  India has a long history of being heavily dependent for these raw materials on China due to one major reason i.e. Low manufacturing cost. But overdependence of APIs imports from China brought various liabilities to India including supply chain disruption and price hikes during pandemic, leading to shortage of various important APIs/KSMs. This COVID 19 widespread has solidly put the center of our country on being “Atma Nirbhar”. And this activity had brought out the strengths, market patterns and opportunities in five divisions counting Healthcare, which are basic from country’s point of view. In view of changing geo-political situation and recalibrated trade arrangement, it is crucial that India become self-reliant within the generation of APIs and KSMs, which is why decreasing the Import reliance for Active pharmaceutical ingredients (APIs) & Key starting materials (KSMs) particularly from china has been focused upon with the assistance of productive linked incentive scheme (PLIS) passed by Department of pharmaceuticals, Government of India to thrive Indian API industry. Hence, this review highlights the current state of Indian API industry, evaluates challenges, opportunities give suggestions for moving forward for self-sufficiency of APIs as well as centers on current regulatory prerequisites for Active pharmaceutical Ingredients.

Life as a Raw Material: Illusions of Control

Somatechnics ◽  
2012 ◽  
Vol 2 (2) ◽  
pp. 250-262 ◽  
Author(s):  
Oron Catts ◽  
Ionat Zurr
Keyword(s):  
Synthetic Biology ◽  
Cognitive Engineering ◽  
Raw Material ◽  
Future Scenarios ◽  
Short History ◽  
Know How ◽  
Political Forces ◽  
History Of ◽  
The Way

The paper discusses and critiques the concept of the single engineering paradigm. This concepts allude to a future in which the control of matter and life, and life as matter, will be achieved by applying engineering principles; through nanotechnology, synthetic biology and, as some suggest, geo-engineering, cognitive engineering and neuro-engineering. We outline some issues in the short history of the field labelled as Synthetic Biology. Furthermore; we examine the way engineers, scientists, designers and artists are positioned and articulating the use of the tools of Synthetic Biology to expose some of the philosophical, ethical and political forces and considerations of today as well as some future scenarios. We suggest that one way to enable the possibilities of alternative frames of thought is to open up the know-how and the access to these technologies to other disciplines, including artistic.

scholarly journals “Let’s Go, Baby Forklift!”: Fandom Governance and the Political Power of Cuteness in China

2021 ◽  
Vol 7 (2) ◽  
pp. 205630512110249
Author(s):  
Jamie Wong ◽  
Crystal Lee ◽  
Vesper Keyi Long ◽  
Di Wu ◽  
Graham M. Jones
Keyword(s):  
Social Media ◽  
Linguistic Anthropology ◽  
The State ◽  
Internet Users ◽  
Voluntary Response ◽  
New Development ◽  
The Status ◽  
History Of ◽  
Hospital Construction ◽  
Novel Strategy

This article describes how the Chinese state borrows from the culture of celebrity fandom to implement a novel strategy of governing that we term “fandom governance.” We illustrate how state-run social media employed fandom governance early in the COVID-19 pandemic when the country was convulsed with anxiety. As the state faced a crisis of confidence, state social media responded with a propagandistic display of state efficacy, broadcasting a round-the-clock livestream of a massive emergency hospital construction project. Chinese internet users playfully embellished imagery from the livestream. They unexpectedly transformed the construction vehicles into cute personified memes, with Baby Forklift and Baby Mud Barfer (a cement mixer) among the most popular. In turn, state social media strategically channeled this playful engagement in politically productive directions by resignifying the personified vehicles as celebrity idols. Combining social media studies with cultural and linguistic anthropology, we offer a processual account of the semiotic mediations involved in turning vehicles into memes, memes into idols, and citizens into fans. We show how, by embedding cute memes within modules of fandom management such as celebrity ranking lists, state social media rendered them artificially vulnerable to a fall in status. Fans, in turn, rallied around to “protect” these cute idols with small but significant acts of digital devotion and care, organizing themselves into fan circles and exhorting each other to vote. In elevating the memes to the status of celebrity idols, state social media thereby created a disposable pantheon of virtual avatars for the state, and consolidated state power by exploiting citizens’ voluntary response to vulnerability. We analyze fandom governance as a new development in the Chinese state’s long history of governing citizens through the management of emotion.

Dependency in Africa: Stages of African Political Economy

1983 ◽  
Vol 9 (2) ◽  
pp. 229-247 ◽  
Author(s):  
Amechi Okolo
Keyword(s):  
Political Economy ◽  
International System ◽  
Raw Material ◽  
The West ◽  
Cheap Labour ◽  
History Of ◽  
The Common ◽  
First Contact ◽  
The Impact ◽  
The Relationship

This paper traces the history of the relationship between Africa and the West since their first contact brought about by the outward thrust of the West, under the impetus of rising capitalism, in search of cheap labour and cheap raw material for its industries and expanding markets for its industrial products, both of which could be better ensured through domination and exploitation. The paper identifies five successive stages that African political economy has passed through under the impact of this relationship, each phase qualitatively different from the other but all having the common characteristic of domination-dependence syndrome, and each phase having been dictated by the dynamics of capitalism in different eras and by the dominant forces in the changing international system. Its finding is that the way to the latest stage, the dependency phase, was paved by the progressive proletarianization of the African peoples and the maintenance of an international peonage system. It ends by indicating the direction in which Africa can make a beginning to break out of dependency and achieve liberation.

Carbon Black. I—A Study of Its Volatile Constituents

1928 ◽  
Vol 1 (3) ◽  
pp. 485-497 ◽  
Author(s):  
C. R. Johnson
Keyword(s):  
Carbon Black ◽  
Volatile Matter ◽  
Original Sample ◽  
Missing Information ◽  
Volatile Constituents ◽  
Vulcanized Rubber ◽  
Rates Of Evolution ◽  
Temperature And Pressure ◽  
The Relationship

Abstract The rates of evolution of gas from carbon black with variation of time, temperature, and pressure have been determined. Complete analyses have been made of five types of carbon black, which involve an organic combustion of the original sample, an organic combustion of the sample after the gases have been removed, a determination of the loss in weight represented by the gases removed, analyses of the gases removed, and finally a complete accounting, or balance, of the carbon in the steps considered. In an attempt to supply some missing information not revealed by the foregoing, some special gas analyses under varying conditions were made. The relationship between the amount and composition of volatile matter evolved from carbon blacks and the properties imparted to vulcanized rubber when compounded with these blacks has been studied.

MODERN PERFORMANCE ON THE KAZAKH KOBYZ

2020 ◽  
Vol 1 (2) ◽  
pp. 176-180
Author(s):  
T. Zh. Yeginbayeva ◽  
Keyword(s):  
Cultural Development ◽  
Ancient History ◽  
Musical Culture ◽  
The Past ◽  
Ensemble Performance ◽  
Natural Tendency ◽  
New Development ◽  
Key Factor ◽  
History Of ◽  
Ancient Times

Global processes in the musical culture of Kazakhstan are the result of the numerous events that have taken place in the country over the past 20 years. The independence of the state has become a key factor that has had a decisive impact on the economic, socio-political and cultural development of the country. We have entered a new life, which has a rich cultural heritage and was carefully preserved by our ancestors. One of the proofs is the history of Kazakh kobyz art from ancient times to the present day. Modern kobyz art is closely connected with ancient history and has a rich natural tendency for new development, based on centuries of experience. Therefore, kobyz music of the XXth–XXIst centuries absorbed the traditions of European genres and styles, and is widely used in mass music, in various directions of ethnorock, art-rock, folk and others. Two lines of development of music for kobyz and music on kobyz existed in ancient times and nowadays. From here comes the divergence of creative direction among modern composers and in ensemble performance.

Early History of Aluminum Metallurgy

2019 ◽  
Author(s):  
Norman C. Craig
Keyword(s):  
United States ◽  
Everyday Life ◽  
The United States ◽  
Direct Application ◽  
Early History ◽  
Aluminum Metal ◽  
New Development ◽  
Metal Aluminum ◽  
History Of ◽  
The Aluminum Industry

Prior to the mid-1880s aluminum was known as a metallic substance but was too costly to be used for other than jewelry-type applications. In 1886, Charles Hall in the United States and Paul Héroult in France discovered an economical electrolysis process for reducing aluminum from its abundant ore, alumina (Al2O3). This method, known today as the Hall–Héroult process, was a direct application of the then-new development of dynamos and principally of waterpower to generate huge amounts of electricity. Within a few years, aluminum was being produced at a low enough price that this metal played a growing role in everyday life. As a lustrous and lightweight metal, aluminum transformed human expectations for the appearance and uses of metals. This paper traces the stories of Hall and Héroult in their historic paths from concept to industrialization for refining aluminum metal. The essentials of the Hall–Héroult process remain fundamental in the aluminum industry today.

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