scholarly journals Porous alkali activated materials with slow alkali release dynamic. Role of composition

2018 ◽  
Vol 68 (329) ◽  
pp. 145 ◽  
Author(s):  
G. Bumanis ◽  
D. Bajare
Keyword(s):  
Buffer Capacity ◽  
Value Added ◽  
Continuous Control ◽  
Molar Ratios ◽  
Water Media ◽  
Scrap Recycling ◽  
Ph Level ◽  
By Products ◽  
Alkali Activated

Alkali activated materials (AAM) based on calcined metakaolin or illite clay together with waste by-products, such as waste glass or aluminium scrap recycling waste, were tested as value-added materials for pH stabilization in biogas technology where decrease of pH should be avoided. Porous materials with ability to slowly leach alkalis in the water media thus providing continuous control of the pH level were obtained. XRD, FTIR, SEM and titration methods were used to characterize AAM and their leaching properties. It is clear that composition of the material has an important effect on the diffusion of alkali from structure. Namely, higher Si/Al and Na/Al molar ratios may increase pore solution transfer to the leachate. The leaching rate of alkalis from the structure of AAM is high for the first few days, decreasing over time. It was possible to calculate the buffer capacity from the mixture design of AAM.

scholarly journals Optimization of the Enzymatic Synthesis of Pentyl Oleate with Lipase Immobilized onto Novel Structured Support

Fermentation ◽  
2019 ◽  
Vol 5 (2) ◽  
pp. 48 ◽  
Author(s):  
Valeria Cavallaro ◽  
Gabriela Tonetto ◽  
María Luján Ferreira
Keyword(s):  
Enzymatic Synthesis ◽  
Reaction Times ◽  
Value Added ◽  
Inhibitory Effects ◽  
Molar Ratios ◽  
Operation Conditions ◽  
Ping Pong ◽  
Experimental Findings ◽  
Increasing Temperature ◽  
By Products

The term biorefinery is related to the sustainable production of value-added bioproducts and bioenergy from biomass. Esters from fatty acids are important compounds synthesized from by-products of the oleochemical industry. In agreement with the biorefinery concept, it is important to search for catalysts that reduce the consumption of energy and water, using moderate operation conditions and low reaction times. In this work, response surface methodology (RSM) was used to optimize the enzymatic synthesis of pentyl oleate using Candida antarctica lipase B (CALB) immobilized on a polyethylene-aluminum structured support. A factorial design was employed to evaluate the effects of several parameters on the ester yield. To obtain a model with a good fit, an approach to reaction mechanism and enzyme kinetics was taken into consideration. Experimental findings were correlated and explained using equations of a ping-pong bi-bi kinetic model and considering the inhibitory effects of both substrates. The developed model was consistent with the experimental data predicting an increase in pentyl oleate production with increasing temperature and a decrease with higher oleic acid amounts and alcohol to acid molar ratios. This model could be useful in a future industrial application of CALB/LLDPE/Al to minimize the costs in oleochemical biorefineries.

The Service Sector in the Economy in Poland and European Union Countries

2015 ◽  
Vol 10 (3) ◽  
pp. 191-207
Author(s):  
Walentyna Kwiatkowska
Keyword(s):  
Service Sector ◽  
Value Added ◽  
Total Employment ◽  
Eu Countries ◽  
Gross Value Added ◽  
European Union Countries ◽  
Service Sectors ◽  
Sector Theory ◽  
The Eu

The role of the service sector in the economy is increasing in the process of socio-economic development. This tendency has been confirmed and explained by the three-sector theory formulated by A.G.B. Fisher, C. Clark, and J. Fourastie. The main goal of the paper is to show development tendencies in service sectors in Poland and the EU countries and assess them in view of the three-sector theory. The share of the service sector in the total employment and in the total gross value added in the years 2005-2013/2014 will be analysed together with two sub-sectors including market and non-market services. The research shows that the share of the service sector in total employment and total gross value added has been recently increasing in Poland as well as in other EU countries, but there is a gap in this process between Poland and the most developed EU countries. Moreover, in Poland, the role of market services has been recently increasing much faster than the role of non-market services. 

Role of Value Added Services in Shaping Indian Telecom Industry

2011 ◽  
Author(s):  
Sanjeet Singh ◽  
Gagan Deep Sharma ◽  
Mandeep Mahendru
Keyword(s):  
Value Added ◽  
Telecom Industry

Understanding the Role of Chlorine and Ozone to Control Postharvest Diseases in Fruit and Vegetables: A Review

2020 ◽  
Vol 16 (4) ◽  
pp. 455-461
Author(s):  
Gabriela M. Baia ◽  
Otniel Freitas-Silva ◽  
Murillo F. Junior
Keyword(s):  
Chlorine Dioxide ◽  
Broad Spectrum ◽  
Fruits And Vegetables ◽  
Low Cost ◽  
Residual Effects ◽  
Pathogenic Microorganisms ◽  
Postharvest Diseases ◽  
Post Harvest ◽  
By Products

Fruits and vegetables are foods that come into contact with various types of microorganisms from planting to their consumption. A lack or poor sanitation of these products after harvest can cause high losses due to deterioration and/ or pathogenic microorganisms. There are practically no post-harvest fungicides or bactericides with a broad spectrum of action that have no toxic residual effects and are safe. However, to minimize such problems, the use of sanitizers is an efficient device against these microorganisms. Chlorine is the most prevalent sanitizing agent because of its broad spectrum, low cost and well-established practices. However, the inevitable formation of disinfection by-products, such as trihalomethanes (THMs) and haloacetic acids (HAAs), is considered one of the main threats to food safety. Alternative sanitizers, such as chlorine dioxide (ClO2) and ozone, are becoming popular as a substitute for traditional post-harvest treatments. Thus, this review addresses the use of chlorine, chlorine dioxide and ozone emphasizing aspects, such as usage, safe application, spectrum of action and legislation. In order to ensure the quality and safety of final products, the adoption of well-prepared sanitation and sanitation programs for post-harvest fruits and vegetables is essential.

scholarly journals The value-added role of sector-specific REITs in Australia

2019 ◽  
Vol 25 (1) ◽  
pp. 49-72
Author(s):  
Yu Cheng Lin ◽  
Hyunbum Cho ◽  
Chyi Lin Lee
Keyword(s):  
Value Added

scholarly journals Valorization of food industry waste and by-products using 3D printing: A study on the development of value-added functional cookies

Future Foods ◽  
2021 ◽  
pp. 100036
Author(s):  
Bhagya Jagadiswaran ◽  
Vishvaa Alagarasan ◽  
Priyadharshini Palanivelu ◽  
Radhika Theagarajan ◽  
J.A. Moses ◽  
...  
Keyword(s):  
3D Printing ◽  
Food Industry ◽  
Value Added ◽  
Industry Waste ◽  
Food Industry Waste ◽  
By Products

112 How Will the Purebred Association Adapt to a Changing Beef Industry?

2021 ◽  
Vol 99 (Supplement_1) ◽  
pp. 39-39
Author(s):  
Mark McCully
Keyword(s):  
Supply Chains ◽  
Genetic Information ◽  
Gene Editing ◽  
Value Added ◽  
Beef Industry ◽  
Breed Improvement ◽  
Pull Through ◽  
Optimum Production ◽  
Selection Tools

Abstract The role of the breed association has historically been to keep a registry of a pure breed, aggregate the performance data surrounding that one breed, develop breeding and selection tools, and conduct breed promotion. Larger associations have been able to augment that with operating magazines and other media, running branded beef programs, feeder calf marketing programs, and genetic evaluation for other breeds. The relevance of breed associations is being and will continue to be challenged as genomics and large commercial databases develop and allow for breeding and selection tools to be developed independently by large breeders or private entities. Gene editing and other such technology will also challenge the traditional seedstock models and opens the door for proprietary genetic lines. Breed associations may need to modify their traditional policies to incorporate these innovations. Supply chains will continue to become far more sophisticated and will incorporate more genetic information to guide management decisions and potentially validate brand promises around sustainability. To stay relevant, breed associations of the future will need to do the following: Balance the needs of diverse membership (show, hobby, lifestyle, etc.) with commercial industry value and significance. Have access to large amounts of data and be leaders in adopting the most current technologies. Deliver tools for breeders that enhance the profitability of commercial producers – identify optimum production levels vs maximum outputs. Work collaboratively with multiple supply chains providing the needed genetic information. Be a significant educational resource to breeders and commercial producers. Be a leader in research on breed improvement and genetic advancement. Have value-added programs that create real and sustained pull-through demand for the end product.

Recent advances to recover value-added compounds from avocado by-products following a biorefinery approach

2021 ◽  
Vol 28 ◽  
pp. 100433
Author(s):  
Alexandra Del Castillo-Llamosas ◽  
Pablo G. del Río ◽  
Alba Pérez-Pérez ◽  
Remedios Yáñez ◽  
Gil Garrote ◽  
...  
Keyword(s):  
Value Added ◽  
Recent Advances ◽  
By Products
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