scholarly journals Potential of Chlorella Species as Feedstock for Bioenergy Production: A Review

2020 ◽  
Vol 24 (2) ◽  
pp. 203-220
Author(s):  
Baiba Ievina ◽  
Francesco Romagnoli
Keyword(s):  
Growth Rate ◽  
Wastewater Treatment ◽  
Bioactive Compounds ◽  
Large Scale ◽  
Economic Feasibility ◽  
Fast Growth ◽  
Added Value ◽  
Climate Conditions ◽  
Bioenergy Production ◽  
Fast Growth Rate

AbstractSelection of appropriate microalgae strain for cultivation is essential for overall success of large-scale biomass production under particular environmental and climate conditions. In addition to fast growth rate and biomass productivity, the species ability to grow in wastewater must also be considered to increase the economic feasibility of microalgae for bioenergy purposes. Furthermore, the content of bioactive compounds in a strain must be taken into account to further increase the viability by integration of biorefinery concept. Chlorella spp. are among the most studied microalgal species. The present review attempts to unfold the potential of species of the genus Chlorella for bioenergy production integrating applicability for wastewater treatment and production of high added-value compounds. Several key features potentially make Chlorella spp. highly beneficial for bioenergy production. Fast growth rate, low nutritional requirements, low sensitivity to contamination, adaptation to fluctuating environments, ability to grow in photoautotrophic, heterotrophic and mixotrophic conditions make Chlorella spp. highly useful for outdoor cultivation coupled with wastewater treatment. Chlorella is a source of multiple bioactive compounds. Most promising high-value products are chlorophylls, lutein, β-carotene and lipids. Here we demonstrate that although many Chlorella spp. show similar characteristics, some substantial differences in growth and response to environmental factors exist.

scholarly journals Fishery Wastes as a Yet Undiscovered Treasure from the Sea: Biomolecules Sources, Extraction Methods and Valorization

Marine Drugs ◽  
2020 ◽  
Vol 18 (12) ◽  
pp. 622
Author(s):  
Gabriella Caruso ◽  
Rosanna Floris ◽  
Claudio Serangeli ◽  
Luisa Di Paola
Keyword(s):  
Fatty Acids ◽  
Bioactive Compounds ◽  
Large Scale ◽  
Current Knowledge ◽  
Chemical Characterization ◽  
Short Chain Fatty Acids ◽  
Economic Feasibility ◽  
Added Value ◽  
By Catch ◽  
By Products

The search for new biological sources of commercial value is a major goal for the sustainable management of natural resources. The huge amount of fishery by-catch or processing by-products continuously produced needs to be managed to avoid environmental problems and keep resource sustainability. Fishery by-products can represent an interesting source of high added value bioactive compounds, such as proteins, carbohydrates, collagen, polyunsaturated fatty acids, chitin, polyphenolic constituents, carotenoids, vitamins, alkaloids, tocopherols, tocotrienols, toxins; nevertheless, their biotechnological potential is still largely underutilized. Depending on their structural and functional characteristics, marine-derived biomolecules can find several applications in food industry, agriculture, biotechnological (chemical, industrial or environmental) fields. Fish internal organs are a rich and underexplored source of bioactive compounds; the fish gut microbiota biosynthesizes essential or short-chain fatty acids, vitamins, minerals or enzymes and is also a source of probiotic candidates, in turn producing bioactive compounds with antibiotic and biosurfactant/bioemulsifier activities. Chemical, enzymatic and/or microbial processing of fishery by-catch or processing by-products allows the production of different valuable bioactive compounds; to date, however, the lack of cost-effective extraction strategies so far has prevented their exploitation on a large scale. Standardization and optimization of extraction procedures are urgently required, as processing conditions can affect the qualitative and quantitative properties of these biomolecules. Valorization routes for such raw materials can provide a great additional value for companies involved in the field of bioprospecting. The present review aims at collecting current knowledge on fishery by-catch or by-products, exploring the valorization of their active biomolecules, in application of the circular economy paradigm applied to the fishery field. It will address specific issues from a biorefinery perspective: (i) fish tissues and organs as potential sources of metabolites, antibiotics and probiotics; (ii) screening for bioactive compounds; (iii) extraction processes and innovative technologies for purification and chemical characterization; (iv) energy production technologies for the exhausted biomass. We provide a general perspective on the techno-economic feasibility and the environmental footprint of the production process, as well as on the definition of legal constraints for the new products production and commercial use.

scholarly journals Effects of feed restriction on metabolic disorders in broiler chickens: A review

2014 ◽  
Vol 30 (1) ◽  
pp. 1-13 ◽  
Author(s):  
M. Sahraei
Keyword(s):  
Growth Rate ◽  
Broiler Chickens ◽  
Broiler Chicken ◽  
Metabolic Disorders ◽  
Production Efficiency ◽  
Early Growth ◽  
Fast Growth ◽  
Feed Consumption ◽  
Feed Restriction ◽  
Fast Growth Rate

Continuous genetic selection and improvement in nutrition have led to a very fast growth rate in modern strains of broiler chickens. Metabolic disorders such as ascits, sudden death syndrome and leg problems are related to a rapid early growth rate in poultry, especially in broilers, and their incidence can be decreased by slowing early growth. The use of management tools to reduce metabolic disorders that rely primarily on decreasing feed consumption, The feed restriction programs is on of the main techniques in growth curve manipulation for increasing production efficiency in broiler chicken in alleviate the incidence of some metabolic disorders and can be used to reduction the unfavorable effects of fast growth rate in broiler chicken production industry, and could be profitable in broiler chickens production efficiency. This article implicated on new findings in about different feed restriction programs effects on these problems in broiler chickens.

scholarly journals Genome-Wide Detection of Selection Signatures in Duroc Revealed Candidate Genes Relating to Growth and Meat Quality

2020 ◽  
Vol 10 (10) ◽  
pp. 3765-3773
Author(s):  
Jian Yu ◽  
Pengju Zhao ◽  
Xianrui Zheng ◽  
Lei Zhou ◽  
Chuduan Wang ◽  
...  
Keyword(s):  
Growth Rate ◽  
Artificial Selection ◽  
Fast Growth ◽  
Phenotypic Traits ◽  
Sequencing Data ◽  
Selection Signatures ◽  
Protein Coding ◽  
Pig Genome ◽  
The Difference ◽  
Fast Growth Rate

With the development of high-throughput genotyping techniques, selection signatures in the genome of domestic pigs have been extensively interrogated in the last decade. The Duroc, a major commercial pig breed famous for its fast growth rate and high lean ratio, has not been extensively studied focusing on footprints of intensively artificial selection in their genomes by a lot of re-sequencing data. The goal of this study was to investigate genomic regions under artificial selection and their contribution to the unique phenotypic traits of the Duroc using whole-genome resequencing data from 97 pigs. Three complementary methods (di, CLR, and iHH12) were implemented for selection signature detection. In Total, 464 significant candidate regions were identified, which covered 46.4 Mb of the pig genome. Within the identified regions, 709 genes were annotated, including 600 candidate protein-coding genes (486 functionally annotated genes) and 109 lncRNA genes. Genes undergoing selective pressure were significantly enriched in the insulin resistance signaling pathway, which may partly explain the difference between the Duroc and other breeds in terms of growth rate. The selection signatures identified in the Duroc population demonstrated positive pressures on a set of important genes with potential functions that are involved in many biological processes. The results provide new insights into the genetic mechanisms of fast growth rate and high lean mass, and further facilitate follow-up studies on functional genes that contribute to the Duroc’s excellent phenotypic traits.

scholarly journals Different Transcriptional Responses from Slow and Fast Growth Rate Strains of Listeria monocytogenes Adapted to Low Temperature

2016 ◽  
Vol 7 ◽  
Author(s):  
Ninoska Cordero ◽  
Felipe Maza ◽  
Helen Navea-Perez ◽  
Andrés Aravena ◽  
Bárbara Marquez-Fontt ◽  
...  
Keyword(s):  
Growth Rate ◽  
Listeria Monocytogenes ◽  
Low Temperature ◽  
Fast Growth ◽  
Transcriptional Responses ◽  
Fast Growth Rate

Growth Kinetics and Formation of Uniform Self-Assembled InAs/GaAs Quantum Dots at

2007 ◽  
Vol 124-126 ◽  
pp. 539-542
Author(s):  
Eui Tae Kim ◽  
Anupam Madhukar
Keyword(s):  
Growth Rate ◽  
Quantum Dots ◽  
Growth Kinetics ◽  
Slow Growth ◽  
Fast Growth ◽  
Slow Growth Rate ◽  
Self Assembled ◽  
Kinetics Of ◽  
Fast Growth Rate ◽  
2D To 3D

We discuss the growth kinetics of InAs/GaAs self-assembled quantum dots (QDs) using two different InAs deposition rates, relatively fast growth rate of 0.22 ML/sec and slow growth rate of 0.054 ML/sec. With increasing InAs deposition amount to 3.0 ML, the QD density was almost constant after 2D to 3D island transition at the slow deposition rate while the QD density kept increasing and the QD size distribution was relatively broad at the fast growth rate. After the 2D to 3D transition, at the slow growth rate, further deposited In adatoms seemed to incorporate primarily into already formed islands, and thus contribute to equalize island size. The photoluminescence (PL) full-width at half maximum (FWHM) of 2.5 ML InAs QDs at 0.054 ML/sec was 23 meV at 78K. The PL characteristics of InAs/GaAs QDs were degraded significantly after thermal annealing at 550 oC for 3 hours.

scholarly journals The genome of the largest bony fish, ocean sunfish (Mola mola), provides insights into its fast growth rate

GigaScience ◽  
2016 ◽  
Vol 5 (1) ◽  
Author(s):  
Hailin Pan ◽  
Hao Yu ◽  
Vydianathan Ravi ◽  
Cai Li ◽  
Alison P. Lee ◽  
...  
Keyword(s):  
Growth Rate ◽  
Bony Fish ◽  
Fast Growth ◽  
Ocean Sunfish ◽  
Mola Mola ◽  
Fast Growth Rate

Fast growth rate of epitaxial β–Ga2O3 by close coupled showerhead MOCVD

2017 ◽  
Vol 475 ◽  
pp. 77-82 ◽  
Author(s):  
Fikadu Alema ◽  
Brian Hertog ◽  
Andrei Osinsky ◽  
Partha Mukhopadhyay ◽  
Mykyta Toporkov ◽  
...  
Keyword(s):  
Growth Rate ◽  
Fast Growth ◽  
Fast Growth Rate

Gold-vapor-assisted chemical vapor deposition of aligned monolayer WSe2 with large domain size and fast growth rate

Nano Research ◽  
2020 ◽  
Vol 13 (10) ◽  
pp. 2625-2631 ◽  
Author(s):  
Mingrui Chen ◽  
Anyi Zhang ◽  
Yihang Liu ◽  
Dingzhou Cui ◽  
Zhen Li ◽  
...  
Keyword(s):  
Growth Rate ◽  
Chemical Vapor Deposition ◽  
Vapor Deposition ◽  
Chemical Vapor ◽  
Domain Size ◽  
Fast Growth ◽  
Large Domain ◽  
Fast Growth Rate
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