scholarly journals A Kinetic study on nitrogen absorption by Sm2Fe17. Aiming at efficient production process of Sm2Fe17N3 nitride magnet.

2001 ◽  
Vol 13 (3) ◽  
pp. 448-450 ◽  
Author(s):  
Hirohisa UCHIDA ◽  
Takashi MIYATA ◽  
Yasushi DAIKUHARA
Keyword(s):  
Kinetic Study ◽  
Production Process ◽  
Efficient Production ◽  
Nitrogen Absorption

scholarly journals Development of a bioprocess technology for the production of Vibrio midae, a probiotic for use in abalone aquaculture

2019 ◽  
Author(s):  
◽  
Ghaneshree Moonsamy
Keyword(s):  
Growth Rate ◽  
Production Process ◽  
Growth Parameters ◽  
Corn Steep Liquor ◽  
Debaryomyces Hansenii ◽  
Downstream Processing ◽  
Base Case ◽  
Efficient Production ◽  
Cell Bank ◽  
Slow Growth Rate

The abalone industry of South Africa is under severe pressure due to illegal harvesting and poaching of this seafood delicacy. These abalones are harvested excessively; as a result, these animals do not have a chance to replace themselves in their habitats, ensuing in a drastic decrease in natural stocks of abalone. Abalone, has an extremely slow growth rate, and takes approximately four years to reach a size that is market acceptable, therefore, it was imperative to investigate methods to boost the overall growth rate and immunity of the animal. The University of Cape Town (UCT) began research, which resulted in the isolation of two microorganisms, a yeast isolate Debaryomyces hansenii and a bacterial isolate Vibrio midae, from the gut of the abalone and characterised them for their probiotic abilities. This work resulted in an internationally competitive concept technology that was patented. The next stage of research was to develop a suitable bioprocess to enable commercial production. Numerous steps were taken to develop an efficient production process for V. midae, one of the isolates found by UCT. The initial stages of research resulted in the development of a stable and validated cell bank which allowed the development of a robust inoculum stage. This was followed by optimization of temperature and pH which resulted in improved probiotic production at a temperature of 30oC and a pH of 6.5. Once these critical growth parameters were established further media optimization studies were performed. The two key nutrient supplements investigated were corn steep liquor (CSL) and High Test Molasses (HTM) due to their suitability, availability and affordability. The optimization of CSL (6.4 g.l-1) and HTM (24 g.l-1) concentrations in the growth medium resulted in a 180% increase in cell concentration, a 5716-fold increase in cell productivity and a 97.2% decrease in the material cost of production when compared to the base case technology. Furthermore, a stable market ready liquid probiotic product, containing viable but not culturable (VBNC) state of Vibrio midae cells, was developed during the downstream processing aspect of the study. Finally, the validation of this production technology at full manufacturing scale was demonstrated which further enhances the attractiveness and commercial feasibility of this probiotic production process.

scholarly journals Von der Wurzel ins Labor: Meerrettichperoxidase produziert in E. coli

BIOspektrum ◽  
2021 ◽  
Vol 27 (7) ◽  
pp. 773-775
Author(s):  
Julian Ebner ◽  
Diana Humer ◽  
Oliver Spadiut
Keyword(s):  
Escherichia Coli ◽  
Horseradish Peroxidase ◽  
Production Process ◽  
Inclusion Bodies ◽  
Medical Applications ◽  
Efficient Production ◽  
E Coli ◽  
Modern Biotechnology

AbstractThe enzyme Horseradish Peroxidase (HRP) is omnipresent in modern biotechnology. Although promising for therapeutic purposes, no suitable production process for this enzyme has been available until now. Medical applications require the enzyme to be highly pure, homogenous and well-defined. We have developed an efficient production process for recombinant HRP from Escherichia coli inclusion bodies. With this strategy we are able to provide active, highly pure and non-glycosylated enzyme at competitive yields.

scholarly journals Productivity, Product Differentiation And Profitability In The Greek Chemical Industry: An Empirical Analysis, 1991 And 2001

2011 ◽  
Vol 4 (10) ◽  
Author(s):  
Eriotis Nikolaos ◽  
Poutos I. Evangelos ◽  
Vasiliou Dimitris ◽  
Ventura Neokismidi Zoe
Keyword(s):  
Production Process ◽  
Cross Section ◽  
Product Differentiation ◽  
Chemical Industry ◽  
Labour Productivity ◽  
Efficient Production ◽  
Data Set ◽  
The Relationship ◽  
Section Analysis

The purpose of this study is to investigate the relationship between the profitability of the firm and its R&D expenditures. We separate R&D expenditures in two main categories, R&D that focuses on the product differentiation and R&D that concerns improvements in production process. The latter leads to more efficient production, which can be measured by labour productivity. We estimate our model using cross section analysis and test the significance of each one of rhe R&D expenditures in firms profitability. Our model was applied to the Greek chemical industry, for a data set of 124 enterprises, in two distinct years, 1991 and 2001. Our findings support that the role of productivity is growing within time.

Manufacturing Processes for Combined Forming of Multi-Material Structures Consisting of Sheet Metal and Local CFRP Reinforcements

2012 ◽  
Vol 504-506 ◽  
pp. 295-300 ◽  
Author(s):  
Hans Christian Schmidt ◽  
Ulf Damerow ◽  
Christian Lauter ◽  
Bernhard Gorny ◽  
Frederik Hankeln ◽  
...  
Keyword(s):  
Carbon Fibre ◽  
Production Process ◽  
Sheet Metal ◽  
Process Design ◽  
Research Work ◽  
Steel Structures ◽  
Experimental Investigations ◽  
Manufacturing Processes ◽  
Efficient Production ◽  
Material Behaviour

A new and promising approach to the reduction of greenhouse gas emissions is the use of improved lightweight constructions based on multi-material systems comprising sheet metal with local carbon fibre reinforced plastic (CFRP) reinforcements. The CFRP is used to reinforce highly stressed areas and can be aligned to specific load cases. The locally restricted application of CFRP means that the material costs can be effectively reduced by comparison to parts made entirely of CFRP on account of the expensive production process requiring the use of an autoclave. These parts are thus only used in high-priced products. The production of hybrid CFRP steel structures in a mass production process calls for an efficient production technology. Current research work within the scope of a collaborative research project running at the University of Paderborn is concentrating on the development of manufacturing processes for the efficient production of automotive structural components made up of sheet metal blanks with local CFRP patches. The project is focusing especially on basic research into the production of industrial components. The aim of the investigation is to create an efficient and controlled process for producing CFRP reinforced steel structures from semi-finished hybrid steel-CFRP material. This includes tool concepts and an appropriate process design to permit short process times. The basis of an efficient process design is an in-depth knowledge of the material behaviour, and hence a thorough characterisation was performed. Material parameters were determined for both simulation and forming. For this, monotonic tensile, shear and bending tests were conducted using both uncured prepregs and cured CFRP specimens. To achieve an accurate simulation of the forming process, a special material model for carbon fibre prepregs has been developed which also includes the anisotropic material behaviour resulting from fibre orientation, the viscoelastic behaviour caused by the matrix and the hardening effects that prevail during curing. Recent results show good qualitative agreement and will be presented in this paper. In order to control the properties of the hybrid components, four different tool concepts for the prepreg press technology have been developed and tested. The concepts are presented and the results of experimental investigations are discussed in this paper.

Kinetic study and simulation of the precopolytransesterification step in the copoly(ethylene-polyoxyethylene terephthalate) production process

1999 ◽  
Vol 39 (10) ◽  
pp. 1913-1920 ◽  
Author(s):  
Cornelio De La Cruz-Guerra ◽  
Gustavo A. García-De La Mora ◽  
M. Javier Cruz-Gómez
Keyword(s):  
Kinetic Study ◽  
Production Process

Material Demand Reduction and Closed-Loop Recycling Automotive Aluminium

MRS Advances ◽  
2018 ◽  
Vol 3 (25) ◽  
pp. 1393-1398 ◽  
Author(s):  
Philippa Horton ◽  
Julian Allwood ◽  
Paul Cassell ◽  
Christopher Edwards ◽  
Adrian Tautscher
Keyword(s):  
Production Process ◽  
Closed Loop ◽  
Aluminum Production ◽  
Efficient Production ◽  
Closed Loop Systems ◽  
Demand Reduction ◽  
Recycled Content ◽  
Recycle Aluminum ◽  
Material Utilization

ABSTRACTEnvironmentally aware automotive manufacturers recycle aluminum production scrap in closed-loop systems to generate environmental and financial savings. Further savings could be gained if material demand is reduced, through improving the material utilization of the production process. Since a more efficient production process generates less scrap, the opportunity for closed loop recycling reduces when material demand reduces. This paper investigates the interaction between material demand reduction and closed loop recycling for an aluminum intensive case-study vehicle. It identifies the greatest environmental and financial savings when both strategies are implemented together. It is shown that a ‘recycled content’ target does not capture these saving opportunities. It is recommended that automotive manufacturers set targets for both material utilization and scrap recovery, to simultaneously promote closed-loop recycling and material demand reduction.

scholarly journals The Efficiency of Nitrogen and Flue Gas as Operating Gases in Explosive Decompression Pretreatment

Energies ◽  
2018 ◽  
Vol 11 (8) ◽  
pp. 2074 ◽  
Author(s):  
Merlin Raud ◽  
Vahur Rooni ◽  
Timo Kikas
Keyword(s):  
Production Process ◽  
Flue Gas ◽  
Efficient Production ◽  
Cellulose Content ◽  
Bioethanol Production ◽  
Treatment Methods ◽  
Second Generation Bioethanol ◽  
Ethanol Yields ◽  
Pre Treatment ◽  
Physical Changes

As the pretreatment process is the most expensive and energy-consuming step in the overall second generation bioethanol production process, it is vital that it is studied and optimized in order to be able to develop the most efficient production process. The aim of this paper was to investigate chemical and physical changes in biomass during the process of applying the explosive decompression pretreatment method using two different gases—N2 and synthetic flue gas. The explosive decompression method is economically and environmentally attractive since no chemicals are used—rather it is pressure that is applied—and water is used to break down the biomass structure. Both pre-treatment methods were used at different temperatures. To be able to compare the effects of the pretreatment, samples from different process steps were gathered together and analysed. The results were used to assess the efficiency of the pretreatment, the chemical and physical changes in the biomass and, finally, the mass balances were compiled for the process during the different process steps of bioethanol production. The results showed that both pre-treatment methods are effective in hemicellulose dissolution, while the cellulose content decreases to a smaller degree. The high glucose and ethanol yields were gained with both explosive pretreatment methods at 175 °C (15.2–16.0 g glucose and 5.6–9.0 g ethanol per 100 g of dry biomass, respectively).

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