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Membranes ◽  
2022 ◽  
Vol 12 (1) ◽  
pp. 82
Author(s):  
Roy Nitzsche ◽  
Hendrik Etzold ◽  
Marlen Verges ◽  
Arne Gröngröft ◽  
Matthias Kraume

Hemicellulose and its derivatives have a high potential to replace fossil-based materials in various high-value-added products. Within this study, two purification cascades for the separation and valorization of hemicellulose and its derived monomeric sugars from organosolv beechwood hydrolyzates (BWHs) were experimentally demonstrated and assessed. Purification cascade 1 included hydrothermal treatment for converting remaining hemicellulose oligomers to xylose and the purification of the xylose by nanofiltration. Purification cascade 2 included the removal of lignin by adsorption, followed by ultrafiltration for the separation and concentration of hemicellulose. Based on the findings of the experimental work, both cascades were simulated on an industrial scale using Aspen Plus®. In purification cascade 1, 63% of the oligomeric hemicellulose was hydrothermally converted to xylose and purified by nanofiltration to 7.8 t/h of a xylose solution with a concentration of 200 g/L. In purification cascade 2, 80% of the lignin was removed by adsorption, and 7.6 t/h of a purified hemicellulose solution with a concentration of 200 g/L was obtained using ultrafiltration. The energy efficiency of the cascades was 59% and 26%, respectively. Furthermore, the estimation of specific production costs showed that xylose can be recovered from BWH at the cost of 73.7 EUR/t and hemicellulose at 135.1 EUR/t.


Author(s):  
Ivan Sevostianov ◽  
Yaroslav Ivanchuck ◽  
Maryna Pidlypna

The processes of processing of grain raw materials are quite common at food and processing enterprises in Ukraine. This is due to the significant volumes and wide variety of these raw materials, as well as a wide range of semi-finished products and finished products that are obtained from them. In particular, the country's enterprises process such types of grain crops as wheat, barley, rye, corn, oats, rice, sorghum, millet, chumiza, mogar, paiza, buckwheat (buckwheat family), mealy amaranth (amaranth family). Peas, beans, lentils, soybeans and other legumes are also grown in large volumes. All these raw materials come from different farms, in different conditions, in a wide range of varieties and quality, thus, even for the same type of grain raw materials such parameters as the shape and size of grains, their weight, moisture, glassiness, hardness, degree of damage and many others may differ significantly. Depending on the type of products obtained from grain raw materials (flour, cereals, malt, bran, starch, gluten, molasses, alcohol grains, vegetable oil, oilcakes, meal), the technologies for its preliminary processing may have significant differences. The purpose of this work is to develop a methodology for choosing a rational sequence for processing grain raw materials, taking into account the initial quality parameters, conditions of a specific production and criteria for the efficiency of working processes (productivity, energy intensity and quality of finished products). The article also provides options for technological schemes for the preliminary processing of the main types of dry grain raw materials. The proposed sequence for the development of these technological schemes can further serve as the basis for creating a computer program for automated synthesis and analysis of rational options for technological processes for processing dry grain raw materials.


Molecules ◽  
2021 ◽  
Vol 26 (23) ◽  
pp. 7316
Author(s):  
Victor F. Farinella ◽  
Eunizinis S. Kawafune ◽  
Marcelo M. P. Tangerina ◽  
Helori V. Domingos ◽  
Leticia V. Costa-Lotufo ◽  
...  

Three endophytic fungi isolated from Moquiniastrum polymorphum (Less.) G. Sancho (Asteraceae) were cultivated using the one strain many compounds (OSMAC) strategy to evaluate the production of griseofulvin derivatives. Extracts obtained were analyzed by HPLC–MS/MS and the chromatographic and spectrometric data used to elaborate a feature-based molecular network (FBMN) through the GNPS platform. This approach allowed the observation of differences such as medium-specific and strain-specific production of griseofulvin derivatives and variations of cytotoxic activity in most extracts. To evaluate the efficiency of the OSMAC approach allied with FBMN analysis in the prospection of compounds of biotechnological interest, griseofulvin and 7-dechlorogriseofulvin were isolated, and the relative concentrations were estimated in all culture media using HPLC–UV, allowing for the inference of the best strain–medium combinations to maximize its production. Malt extract-peptone broth and Wickerham broth media produced the highest concentrations of both secondary metabolites.


2021 ◽  
Vol 13 (21) ◽  
pp. 12310
Author(s):  
Yamna Erraach ◽  
Fatma Jaafer ◽  
Ivana Radić ◽  
Mechthild Donner

Product labeling is a way to inform consumers and increase their awareness about sustainability attributes of products. It guarantees the use of specific production conditions, promotes market incentives and highlights environmental, social and/or ethical product attributes. This study provides a literature review of sustainability labels on olive oil including consumer attitudes and behavior towards this product. Results show that consumers have positive attitudes towards olive oil carrying sustainability labels and are willing to pay more for olive oil carrying those labels. However, the major drivers of this behavior are far from being related to sustainability. This insight jeopardizes the main objective of those labels and suggests more clarifications about the information delivered by them. More in-depth investigations are needed about the drivers of consumer behavior towards olive oil carrying sustainability labels.


2021 ◽  
Vol 9 (1) ◽  
Author(s):  
Patrick Schmidt ◽  
Matthias A. Blessing ◽  
Tabea J. Koch ◽  
Klaus G. Nickel

AbstractBirch tar is one of the oldest adhesives known in human history. Its production has been discussed in the framework of early complex behaviours and sophisticated cognitive capacities. The precise production method used in the Palaeolithic remains unknown today. Arguments for or against specific production pathways have been based on efficiency or process complexity. No studies have addressed the question whether birch tar made with different techniques is more or less performant in terms of its properties. We therefore investigate the adhesive performance of birch tar made with three distinct methods: the open-air condensation method and two variations of underground structures that approximate the double-pot method in aceramic conditions. We use lap-shear testing, a standard mechanical test used for testing the strength of industrial adhesives. Tar made in 1 h with the condensation method has a shear strength similar to, although slightly higher than, tar made underground if the underground process lasts for 20 h. However, tars from shorter underground procedures (5 h) are significantly less strong (by a factor of about 3). These findings have important implications for our understanding of the relationship between the investment required for Palaeolithic birch tar production and the benefits that birch tar represented for early technology. In this regard, the simple and low-investment open-air condensation method provides the best ratio.


2021 ◽  
Vol 923 (1) ◽  
pp. 012067
Author(s):  
Assad A. Abdullah ◽  
Zuhal R. Kadhim

Abstract The research aims to study the optimal allocation of irrigation water that is used to irrigate various agricultural crops at the level of Iraq. In order to achieve the research aim, two economic models were formulated according to the Simplex Algorithm. The two models included forty agricultural crops, which were restricted by twenty specific production resources. The estimated results indicated that there is a surplus of the water resource for both the actual crop composition plan and the proposed basic plans for the two estimated models amounting to about 30.943, 35.357 and 31.097 billion cubic meters for each plan, respectively, compared to the quantities of water available for agricultural use. The results of the analysis of the two estimated models indicated to prefer the results of plans with legislative restrictions due to the expansion of the area of strategic and important crops for local consumption, with less needs of water.


2021 ◽  
Vol 12 (3-2021) ◽  
pp. 13-19
Author(s):  
O.V. Bondarev ◽  

In this article presented data on the growth of the atlantic cod Gadus morhua Linnaeus, 1758 and pollock Pollachius virens (Linnaeus, 1758) juveniles in Zelenetskaya Bay in 2018. The daily specific growth rate and production rate were calculated. The length of atlantic cod juveniles in July–September varied from 3.5 to 7.9 cm, and pollock – from 2.5 to 9.4 cm. The daily specific weight growth rate (qw) of atlantic cod juveniles in Zelenetskaya Bay from July to August was 0.41, and from August to September – 1.08; for pollock juveniles, these indicators are 1.32 and 0.94, respectively. The daily specific production (C) of atlantic cod juveniles in Zelenetskaya Bay over the summer period varied from 0.015 to 0.036, and of pollock juveniles – from 0.011 to 0.042.


2021 ◽  
Vol 7 (3) ◽  
pp. 445-467 ◽  
Author(s):  
Jan-Peter Herbst

Viking metal, Teutonic metal, Mesopotamian metal – labels of this kind are common in fan discourse, media and academia. Whereas some research has investigated such labels and related them to the artist’s stage presentation, music videos, artwork and lyrics, there is still a lack from the perspectives of music production and performance as to how such culturally and geographically associated labels differ musically. This article explores culture-specific production and performance characteristics of Teutonic metal, focusing on how metal from Germany differed from British and US-American productions in the 1980s and 1990s, during which time metal spread to Continental Europe and German speed metal achieved an international reputation for its original interpretation of metal. The study is based on a qualitative interview design with three record producers who were crucial for the rise of German metal labels and their bands: Harris Johns for Noise Records, Siggi Bemm for Century Media and Charlie Bauerfeind for Steamhammer. The findings suggest that performances differed between bands from Germany, America and Great Britain regarding timing, rhythmic precision, ensemble synchronization and expressiveness. Likewise, production approaches varied due to distinct preferences for certain guitar amplifiers, drum tunings, microphone techniques, mixing concepts and studio acoustics. Despite such culture-specific differences, it proved difficult for the interviewed producers to identify distinguishing features. Genre conventions seem to have a stronger impact than cultural origin overall.


Foods ◽  
2021 ◽  
Vol 10 (8) ◽  
pp. 1946
Author(s):  
Antonia Tamborrino ◽  
Filippo Catalano ◽  
Alessandro Leone ◽  
Biagio Bianchi

The anaerobic digestion plant studied in this paper is one of the first full-scale plants using olive oil by-products. This is a two-stage plant with a power of 100 kWe. Two tests were performed: the first on olive pulp and pitted pomace and the second on biomass consisting of 10% crushed cereal. In both cycles, the retention time was 40 days. The production of biogas was between 51 and 52 m3/h, with limited fluctuations. The specific production values of biogas indicate that a volume of biogas greater than 1 m3/kg was produced in both tests. The produced biogas had a methane percentage of about 60% and the specific production (over total volatile solids, TVS) of methane was of the order of 0.70 m3methane/kgTVS. FOS/Alk (ratio between volatile organic acids and alkalinity) was always lower than 1 and tended to decrease in the second digester, indicating a stable methanogenic phase and the proper working of the methanogenic bacteria in the second reactor. The concentration of incoming biomass TPC (total polyphenols content) can vary significantly, due to the seasonality of production or inadequate storage conditions, but all measured values of TPC, between 1840 and 3040 mg gallic acid kg−1, are considered toxic both for acidogenic and methanogenic bacteria. By contrast, during the process the polyphenols decreased to the minimum value at the end of the acidogenic phase, biogas production did not stop, and the methane percentage was high.


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