scholarly journals Modeling current and future role of agricultural waste in the production of bioethanol for gasoline vehicles

BioResources ◽  
2021 ◽  
Vol 16 (3) ◽  
pp. 4798-4813
Author(s):  
Shahram Badamchi­­zadeh ◽  
Ahmad Jahan Latibari ◽  
Ajang Tajdini ◽  
Shademan Pourmousa ◽  
Amir Lashgari
Keyword(s):  
Fossil Fuel ◽  
Agricultural Waste ◽  
Global Perspective ◽  
Gasoline Demand ◽  
Second Generation Bioethanol ◽  
Transportation Sector ◽  
Gasoline Vehicles ◽  
Accurate Forecast ◽  
Auto Regressive

This study addressed the urgent need for biofuels even in countries such as Iran, which has fairly good fossil fuel resources. The problems, necessities of the present, and future demand for biofuels are discussed. As the transportation sector is one of the largest sources of air pollution, this study has focused on this sector. This issue was examined from a global perspective, and then within the context of domestic bioethanol production using agricultural residues and proposing different scenarios. The first step in implementing this policy is the accurate forecast of the demand for second-generation bioethanol in the coming years. A nonlinear auto regressive neural network was applied to predict gasoline demand based on Mackey-Glass chaotic time series. Gasoline demand is forecasted by 2030, based on projected volumes of gasoline in different bioethanol mixture scenarios. Results revealed that using scenarios E10, E15, E25, the volume of bioethanol needed by 2030 will amount to 10.12, 15.16 and 25.31 million L per day which can be produced using agricultural products wastes.

scholarly journals Changing Technology or Behavior? The Impacts of a Behavioral Disruption

2021 ◽  
Vol 13 (11) ◽  
pp. 5861
Author(s):  
Marianne Pedinotti-Castelle ◽  
Pierre-Olivier Pineau ◽  
Kathleen Vaillancourt ◽  
Ben Amor
Keyword(s):  
Energy Transition ◽  
Energy System ◽  
Behavior Changes ◽  
Ghg Emission ◽  
The North ◽  
Behavioral Disruption ◽  
Transportation Sector ◽  
Key Factor ◽  
Additional Costs

Transportation is a key factor in the fight against climate change. Consumer behavior changes in transportation are underrepresented in energy policies, even if they could be essential to achieve the fixed GHG emission reduction targets. To help quantify the role of behaviors in energy transition and their implications on the dynamics of an energy system, this study is conducted using the North American TIMES Energy Model, adapted to Quebec (Canada). A behavioral disruption scenario (an increase in carpooling) is introduced in the model’s transportation sector and is compared to a massive electrification scenario. Our results highlight the fact that a behavioral disruption can lead to the same GHG emission reductions (65%) by 2050 as an electrification policy, while alleviating different efforts (such as additional electrical capacity and additional costs) associated with massive electrification. Moreover, the results are sensitive to behavior-related parameters, such as social discount rates and car lifetimes.

scholarly journals A short history of ocean acidification science in the 20th century: a chemist's view

2013 ◽  
Vol 10 (11) ◽  
pp. 7411-7422 ◽  
Author(s):  
P. G. Brewer
Keyword(s):  
Ocean Acidification ◽  
20Th Century ◽  
Fossil Fuel ◽  
Trade Offs ◽  
History Of ◽  
Chemical Knowledge ◽  
The Creation ◽  
Ph Scale ◽  
The Impact

Abstract. This review covers the development of ocean acidification science, with an emphasis on the creation of ocean chemical knowledge, through the course of the 20th century. This begins with the creation of the pH scale by Sørensen in 1909 and ends with the widespread knowledge of the impact of the "High CO2 Ocean" by then well underway as the trajectory along the IPCC scenario pathways continues. By mid-century the massive role of the ocean in absorbing fossil fuel CO2 was known to specialists, but not appreciated by the greater scientific community. By the end of the century the trade-offs between the beneficial role of the ocean in absorbing some 90% of all heat created, and the accumulation of some 50% of all fossil fuel CO2 emitted, and the impacts on marine life were becoming more clear. This paper documents the evolution of knowledge throughout this period.

scholarly journals Role of sustainomics and external climate forcing mechanism in biodiversity extinction : An overview

2019 ◽  
Vol 11 (1) ◽  
pp. 223-226
Author(s):  
Neerja Upadhyaya ◽  
Ruchi Jain ◽  
R. Upadhyaya
Keyword(s):  
Climate Change ◽  
Fossil Fuel ◽  
Wide Distribution ◽  
Complex Problem ◽  
Climate Forcing ◽  
Sensitive Issue ◽  
The Government ◽  
Social Scientific ◽  
Living Organisms

Over millions of years, physiology and anatomy of the living organisms has been changed due to internal climate forcing mechanism. This has influenced the world wide distribution of species. External climate forcing mechanism has caused rapid rise in earth’s temperature and it is expected to rise by 2-4 °C by the end of the century. It has now been recognised as the most complex problem of present scenario and being concerned in almost every field of science. Climate change is the most sensitive issue which is a challenge not only for the government and society but also for each individual. In the present communication impact of external climate forcing mechanism on biodiversity and its extinction is being analysed and role of sustainomics for the same is overviewed. Studies reveal that the rate of speciation of flora and fauna is not in the accordance with the rate of externally enforced climate change. Thus, the increased rate of climate change has caused catastrophic mass extinction threat for plants, animals and insects in the anthrapocene era. The pattern of extinction and threatened species are not yet known. Various solutions for the problem have been suggested by the multidisciplinary researches, rooted by the sustainomics. These suggestions include to diverge from fossil fuel, to use renewables, to make and apply rules for 3Rs etc. Only cooperative involvement of social, scientific and industrial bodies may resolve the problem.

scholarly journals Combination of Autohydrolysis and Catalytic Hydrolysis of Biomass for the Production of Hemicellulose Oligosaccharides and Sugars

Reactions ◽  
2021 ◽  
Vol 3 (1) ◽  
pp. 30-46
Author(s):  
Léa Vilcocq ◽  
Agnès Crepet ◽  
Patrick Jame ◽  
Florbela Carvalheiro ◽  
Luis C. Duarte
Keyword(s):  
Agricultural Waste ◽  
Solid Acid Catalyst ◽  
Acid Catalyst ◽  
Energy Crop ◽  
Catalytic Hydrolysis ◽  
Experimental Conditions ◽  
Different Types ◽  
Hemicellulosic Sugars ◽  
Hydrolysis Of

Three different types of biomass sourced from forestry waste (eucalyptus residues), agricultural waste (wheat straw), and energy crop (miscanthus) were used as starting materials to produce hemicellulosic sugars, furans (furfural and hydroxymethylfurfural), and oligosaccharides. A two-step hybrid process was implemented; biomass was first autohydrolysed without any additive to extract hemicelluloses and dissolve it in water. Then, the hydrolysate was treated with a solid acid catalyst, TiO2-WOx, in order to achieve hydrolysis and produce monomeric sugars and furans. This article investigates the role of the biomass type, autohydrolysis experimental conditions, polymerisation degree and composition of hemicelluloses on the performance of the process coupling autohydrolysis and catalytic hydrolysis. The highest global yields of both oligosaccharides and monomeric sugars were obtained from Eucalyptus (37% and 18%, respectively).

scholarly journals The Role of Investment in Road Development in Egypt: دور الاستثمار في تنمية الطرق البرية في مصر

2019 ◽  
Vol 3 (11) ◽  
Author(s):  
Yasmine Mahmoud Elgazzar
Keyword(s):  
Economic Development ◽  
Private Sector ◽  
Urban Communities ◽  
Economic Activity ◽  
Private Investment ◽  
External Funding ◽  
Transportation Sector ◽  
Road Development ◽  
Analytical Approaches

    The paper illustrates the role of investment in the roads transportation sector development in Egypt. As the investments is considered an important source of external funding especially for countries that are characterized by low level of savings and investments like Egypt. As the country is seeking to attract many investments in order to work on the expansion and the construction of new urban communities and industrial centers. Egypt also is trying work on extending the roads networks between the different regions. The thing that made it a necessity for Egypt to attract the private investment sector as source to finance these investments in the transportation sector. To achieve the objective of the paper, both inductive and descriptive analytical approaches will be combined. The study concluded that there should be integration between economic activity plans and expansion plans in transport activities depending on the size of investment and also encourage the private sector to provide many investments to help the growth of industries, intensify investment and participate in the wheel of economic development.   ، ، ، ، ، ،

scholarly journals Geographical Variation in the profile of RET Variants in Patients with Medullary Thyroid Cancer: A Comprehensive Review

2021 ◽  
Author(s):  
Rui M. B. Maciel ◽  
Ana Luiza Maia
Keyword(s):  
Haplotype Analysis ◽  
Medullary Thyroid Cancer ◽  
Genetic Diagnosis ◽  
Epidemiological Data ◽  
Global Perspective ◽  
Causative Role ◽  
Medullary Thyroid ◽  
Pathogenic Variants

Genetic variability in humans is influenced by many factors, such as natural selection, mutations, genetic drift, and migrations. Molecular epidemiology evaluates the contribution of genetic risk factors in the etiology, diagnosis, and prevention of a particular disease. Few areas of medicine have been so clearly affected by genetic diagnosis and management as multiple neoplasia type 2 (MEN2), in which activating pathogenic variants in the RET gene results in the development of medullary thyroid carcinoma (MTC), pheochromocytoma, and hyperparathyroidism in nearly 98%, 50% and 25% of gene carriers, respectively. Here, we aimed to collect RET genotyping data worldwide to analyze the distribution and frequency of RET variants from a global perspective. We show that the mutational spectrum of RET is observed worldwide. The codon 634 variants seem to be the most prevalent, but there are differences in the type of amino acid exchanges among countries and in the frequencies of the other RET codon variants. Most interestingly, studies using haplotype analysis or pedigree linkage have demonstrated that some pathogenic RET variants have been transmitted to offspring for centuries, explaining some local prevalence due to a founder effect. Unfortunately, after almost three decades after the causative role of the germline RET variants have been reported in hereditary MTC, comprehensive genotyping data remain limited to a few countries. The heterogeneity of RET variants justifies the need for a global effort to describe epidemiological data of families with MEN2 to further understand the genetic background and environmental circumstances that affect disease presentation.

scholarly journals The role of maize hybrids in current trends of bioethanol production

2020 ◽  
Vol 26 (2) ◽  
pp. 21-29
Author(s):  
Valentina Nikolić ◽  
Slađana Žilić ◽  
Milica Radosavljević ◽  
Marijana Simić
Keyword(s):  
Fossil Fuels ◽  
Raw Materials ◽  
Alternative Fuel ◽  
Bioethanol Production ◽  
Economic Activities ◽  
Fuel Production ◽  
Gasoline Demand ◽  
Current Trends ◽  
Production And Consumption

Bioethanol is a biofuel that is mostly used as a replacement for fossil fuels worldwide with yearly production reaching nearly 110 billion liters in 2019. Trends of producing this alternative fuel are rising and maize is considered as one of the best renewable raw materials for the production of fuel ethanol due to the high content of starch in the grain. Taking into account that Serbia is one of the most prominent maize producers in Europe, the surpluses of this crop could be directed towards bioethanol production. Even though there is no organized production and consumption of bioethanol as an automotive fuel in Serbia, the Serbian Government has recently introduced some new regulations regarding biofuels. However, due to the reduction of economic activities since the onset of COVID-19 pandemic in 2020, the global demand for crude oil has fallen sharply, negatively affecting the gasoline demand, and thus for bioethanol, which makes the future of this alternative fuel production notably uncertain.

scholarly journals Impact of the Covid-19 Pandemic on Indonesia Halal Tourism Transportation

2021 ◽  
Vol 3 (1) ◽  
pp. 19-36
Author(s):  
Hadi Peristiwo
Keyword(s):  
Physical Distance ◽  
Review Literature ◽  
Tourism Industry ◽  
Transport Sector ◽  
Main Requirement ◽  
Indonesian Population ◽  
Transportation Sector ◽  
Tourism Sector ◽  
The Impact

The covid 19 pandemics have slowed down the world economy, especially Indonesia, especially in the halal tourism sector. As known halal tourism sector is hard hit by the pandemic covid 19, especially in the transport sector which is much in the set on the restriction of physical distance. This journal's literature review will explore the impact of covid-19 on the role of the transportation sector in the halal tourism industry in Indonesia, as well as identify opportunities and challenges in the transportation sector for halal tourism during the Covid-19 pandemic. This journal review literature research method is carried out by searching for published articles on Sage, Elsevier Science, and Taylor Francis with the selected keywords namely Covid-19, Transportation, and Halal Tourism. The search was carried out by limiting publications from 2010–2020. From the results of the literature search, it can be seen that there was a change or shift in behavior from pre-covid-19 activities to the covid-19 era which had a direct impact on decreasing the movement or mobility of the Indonesian population in the halal tourism transportation sector. Transportation with a health element as the main requirement that needs to be implemented in halal tourism is an important aspect for sustainable halal tourism during the covid-19 pandemic.

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