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BIOTECHNOLOGY (247 journals)                  1 2 | Last

Showing 1 - 200 of 247 Journals sorted alphabetically
3 Biotech     Open Access   (Followers: 8)
Advanced Biomedical Research     Open Access  
Advances in Bioscience and Biotechnology     Open Access   (Followers: 18)
Advances in Genetic Engineering & Biotechnology     Hybrid Journal   (Followers: 10)
Advances in Regenerative Medicine     Open Access   (Followers: 3)
African Journal of Biotechnology     Open Access   (Followers: 6)
Algal Research     Partially Free   (Followers: 10)
American Journal of Biochemistry and Biotechnology     Open Access   (Followers: 68)
American Journal of Bioinformatics Research     Open Access   (Followers: 7)
American Journal of Polymer Science     Open Access   (Followers: 33)
Amylase     Open Access  
Anadolu University Journal of Science and Technology : C Life Sciences and Biotechnology     Open Access  
Animal Biotechnology     Hybrid Journal   (Followers: 9)
Annales des Sciences Agronomiques     Full-text available via subscription  
Applied Biochemistry and Biotechnology     Hybrid Journal   (Followers: 44)
Applied Biosafety     Hybrid Journal  
Applied Food Biotechnology     Open Access   (Followers: 3)
Applied Microbiology and Biotechnology     Hybrid Journal   (Followers: 66)
Applied Mycology and Biotechnology     Full-text available via subscription   (Followers: 4)
Arthroplasty Today     Open Access   (Followers: 1)
Artificial Cells, Nanomedicine and Biotechnology     Hybrid Journal   (Followers: 1)
Asia Pacific Biotech News     Hybrid Journal   (Followers: 2)
Asian Journal of Biotechnology     Open Access   (Followers: 9)
Asian Pacific Journal of Tropical Biomedicine     Open Access   (Followers: 2)
Australasian Biotechnology     Full-text available via subscription   (Followers: 1)
Banat's Journal of Biotechnology     Open Access  
BBR : Biochemistry and Biotechnology Reports     Open Access   (Followers: 5)
Beitr?ge zur Tabakforschung International/Contributions to Tobacco Research     Open Access   (Followers: 3)
Bio-Algorithms and Med-Systems     Hybrid Journal   (Followers: 2)
Bio-Research     Full-text available via subscription   (Followers: 4)
Bioactive Materials     Open Access   (Followers: 1)
Biocatalysis and Agricultural Biotechnology     Hybrid Journal   (Followers: 4)
Biocybernetics and Biological Engineering     Full-text available via subscription   (Followers: 5)
Bioethics UPdate     Hybrid Journal   (Followers: 1)
Biofuels     Hybrid Journal   (Followers: 11)
Biofuels Engineering     Open Access   (Followers: 1)
Biological & Pharmaceutical Bulletin     Full-text available via subscription   (Followers: 4)
Biological Cybernetics     Hybrid Journal   (Followers: 10)
Biomarkers and Genomic Medicine     Open Access   (Followers: 3)
Biomaterials Research     Open Access   (Followers: 4)
BioMed Research International     Open Access   (Followers: 4)
Biomédica     Open Access  
Biomedical and Biotechnology Research Journal     Open Access  
Biomedical Engineering Research     Open Access   (Followers: 6)
Biomedical Glasses     Open Access  
Biomedical Reports     Full-text available via subscription  
BioMedicine     Open Access  
Biomedika     Open Access  
Bioprinting     Hybrid Journal   (Followers: 1)
Bioresource Technology Reports     Hybrid Journal   (Followers: 1)
Bioscience, Biotechnology, and Biochemistry     Hybrid Journal   (Followers: 20)
Biosensors Journal     Open Access  
Biosimilars     Open Access   (Followers: 1)
Biosurface and Biotribology     Open Access  
Biotechnic and Histochemistry     Hybrid Journal   (Followers: 1)
BioTechniques : The International Journal of Life Science Methods     Full-text available via subscription   (Followers: 27)
Biotechnologia Acta     Open Access   (Followers: 1)
Biotechnologie, Agronomie, Société et Environnement     Open Access   (Followers: 2)
Biotechnology     Open Access   (Followers: 8)
Biotechnology & Biotechnological Equipment     Open Access   (Followers: 4)
Biotechnology Advances     Hybrid Journal   (Followers: 32)
Biotechnology and Applied Biochemistry     Hybrid Journal   (Followers: 44)
Biotechnology and Bioengineering     Hybrid Journal   (Followers: 158)
Biotechnology and Bioprocess Engineering     Hybrid Journal   (Followers: 6)
Biotechnology and Genetic Engineering Reviews     Hybrid Journal   (Followers: 12)
Biotechnology and Health Sciences     Open Access   (Followers: 1)
Biotechnology and Molecular Biology Reviews     Open Access   (Followers: 2)
Biotechnology Annual Review     Full-text available via subscription   (Followers: 5)
Biotechnology for Biofuels     Open Access   (Followers: 9)
Biotechnology Frontier     Open Access   (Followers: 1)
Biotechnology Journal     Hybrid Journal   (Followers: 17)
Biotechnology Law Report     Hybrid Journal   (Followers: 3)
Biotechnology Letters     Hybrid Journal   (Followers: 33)
Biotechnology Progress     Hybrid Journal   (Followers: 40)
Biotechnology Reports     Open Access  
Biotechnology Research & Innovation     Open Access  
Biotechnology Research International     Open Access   (Followers: 1)
Biotechnology Techniques     Hybrid Journal   (Followers: 9)
Biotecnología Aplicada     Open Access  
Bioteknologi (Biotechnological Studies)     Open Access  
BIOTIK : Jurnal Ilmiah Biologi Teknologi dan Kependidikan     Open Access  
Biotribology     Hybrid Journal   (Followers: 1)
BMC Biotechnology     Open Access   (Followers: 16)
Cell Biology and Development     Open Access  
Chinese Journal of Agricultural Biotechnology     Full-text available via subscription   (Followers: 4)
Communications in Mathematical Biology and Neuroscience     Open Access  
Computational and Structural Biotechnology Journal     Open Access   (Followers: 1)
Computer Methods and Programs in Biomedicine     Hybrid Journal   (Followers: 8)
Copernican Letters     Open Access   (Followers: 1)
Critical Reviews in Biotechnology     Hybrid Journal   (Followers: 18)
Crop Breeding and Applied Biotechnology     Open Access   (Followers: 3)
Current Bionanotechnology     Hybrid Journal  
Current Biotechnology     Hybrid Journal   (Followers: 3)
Current Opinion in Biomedical Engineering     Hybrid Journal   (Followers: 1)
Current Opinion in Biotechnology     Hybrid Journal   (Followers: 53)
Current Pharmaceutical Biotechnology     Hybrid Journal   (Followers: 9)
Current Research in Bioinformatics     Open Access   (Followers: 13)
Current Trends in Biotechnology and Chemical Research     Open Access   (Followers: 2)
Current trends in Biotechnology and Pharmacy     Open Access   (Followers: 7)
DNA and RNA Nanotechnology     Open Access  
EBioMedicine     Open Access  
Electronic Journal of Biotechnology     Open Access  
Entomologia Generalis     Full-text available via subscription   (Followers: 1)
Environmental Science : Processes & Impacts     Full-text available via subscription   (Followers: 4)
Experimental Biology and Medicine     Hybrid Journal   (Followers: 3)
Folia Medica Indonesiana     Open Access  
Food Bioscience     Hybrid Journal  
Food Biotechnology     Hybrid Journal   (Followers: 9)
Food Science and Biotechnology     Hybrid Journal   (Followers: 8)
Frontiers in Bioengineering and Biotechnology     Open Access   (Followers: 5)
Frontiers in Systems Biology     Open Access   (Followers: 1)
Fungal Biology and Biotechnology     Open Access   (Followers: 2)
GM Crops and Food: Biotechnology in Agriculture and the Food Chain     Full-text available via subscription   (Followers: 1)
GSTF Journal of BioSciences     Open Access  
HAYATI Journal of Biosciences     Open Access  
Horticultural Biotechnology Research     Open Access  
Horticulture, Environment, and Biotechnology     Hybrid Journal   (Followers: 11)
IEEE Transactions on Molecular, Biological and Multi-Scale Communications     Hybrid Journal   (Followers: 1)
IET Nanobiotechnology     Hybrid Journal   (Followers: 2)
IN VIVO     Full-text available via subscription   (Followers: 4)
Indian Journal of Biotechnology (IJBT)     Open Access   (Followers: 2)
Indonesia Journal of Biomedical Science     Open Access   (Followers: 2)
Indonesian Journal of Biotechnology     Open Access   (Followers: 1)
Indonesian Journal of Medicine     Open Access  
Industrial Biotechnology     Hybrid Journal   (Followers: 18)
International Biomechanics     Open Access  
International Journal of Bioinformatics Research and Applications     Hybrid Journal   (Followers: 15)
International Journal of Biomechatronics and Biomedical Robotics     Hybrid Journal   (Followers: 4)
International Journal of Biomedical Research     Open Access   (Followers: 2)
International Journal of Biotechnology     Hybrid Journal   (Followers: 5)
International Journal of Biotechnology and Molecular Biology Research     Open Access   (Followers: 4)
International Journal of Biotechnology for Wellness Industries     Partially Free   (Followers: 1)
International Journal of Environment, Agriculture and Biotechnology     Open Access   (Followers: 5)
International Journal of Functional Informatics and Personalised Medicine     Hybrid Journal   (Followers: 4)
International Journal of Life Sciences and Biotechnology     Open Access  
International Journal of Medicine and Biomedical Research     Open Access   (Followers: 1)
International Journal of Nanotechnology and Molecular Computation     Full-text available via subscription   (Followers: 3)
International Journal of Radiation Biology     Hybrid Journal   (Followers: 5)
Iranian Journal of Biotechnology     Open Access  
ISABB Journal of Biotechnology and Bioinformatics     Open Access  
Italian Journal of Food Science     Open Access   (Followers: 1)
JDREAM : Journal of interDisciplinary REsearch Applied to Medicine     Open Access  
JMIR Biomedical Engineering     Open Access  
Journal of Biometrics & Biostatistics     Open Access   (Followers: 3)
Journal of Bioterrorism & Biodefense     Open Access   (Followers: 6)
Journal of Petroleum & Environmental Biotechnology     Open Access   (Followers: 1)
Journal of Advanced Therapies and Medical Innovation Sciences     Open Access  
Journal of Advances in Biotechnology     Open Access   (Followers: 5)
Journal Of Agrobiotechnology     Open Access  
Journal of Analytical & Bioanalytical Techniques     Open Access   (Followers: 7)
Journal of Animal Science and Biotechnology     Open Access   (Followers: 4)
Journal of Applied Biomedicine     Open Access   (Followers: 2)
Journal of Applied Biotechnology     Open Access   (Followers: 2)
Journal of Applied Biotechnology Reports     Open Access   (Followers: 2)
Journal of Applied Mathematics & Bioinformatics     Open Access   (Followers: 5)
Journal of Biologically Active Products from Nature     Hybrid Journal   (Followers: 1)
Journal of Biomaterials and Nanobiotechnology     Open Access   (Followers: 6)
Journal of Biomedical Photonics & Engineering     Open Access  
Journal of Biomedical Practitioners     Open Access  
Journal of Bioprocess Engineering and Biorefinery     Full-text available via subscription  
Journal of Bioprocessing & Biotechniques     Open Access  
Journal of BioScience and Biotechnology     Open Access  
Journal of Biosecurity Biosafety and Biodefense Law     Hybrid Journal   (Followers: 3)
Journal of Biotechnology     Hybrid Journal   (Followers: 62)
Journal of Biotechnology and Strategic Health Research     Open Access   (Followers: 2)
Journal of Chemical and Biological Interfaces     Full-text available via subscription   (Followers: 1)
Journal of Chemical Technology & Biotechnology     Hybrid Journal   (Followers: 9)
Journal of Chitin and Chitosan Science     Full-text available via subscription   (Followers: 1)
Journal of Colloid Science and Biotechnology     Full-text available via subscription  
Journal of Commercial Biotechnology     Full-text available via subscription   (Followers: 6)
Journal of Crop Science and Biotechnology     Hybrid Journal   (Followers: 3)
Journal of Ecobiotechnology     Open Access  
Journal of Essential Oil Research     Hybrid Journal   (Followers: 2)
Journal of Experimental Biology     Full-text available via subscription   (Followers: 26)
Journal of Genetic Engineering and Biotechnology     Open Access   (Followers: 5)
Journal of Ginseng Research     Open Access  
Journal of Industrial Microbiology and Biotechnology     Hybrid Journal   (Followers: 18)
Journal of Integrative Bioinformatics     Open Access  
Journal of Medical Imaging and Health Informatics     Full-text available via subscription  
Journal of Molecular Biology and Biotechnology     Open Access  
Journal of Molecular Microbiology and Biotechnology     Full-text available via subscription   (Followers: 13)
Journal of Nano Education     Full-text available via subscription  
Journal of Nanobiotechnology     Open Access   (Followers: 4)
Journal of Nanofluids     Full-text available via subscription   (Followers: 1)
Journal of Organic and Biomolecular Simulations     Open Access  
Journal of Plant Biochemistry and Biotechnology     Hybrid Journal   (Followers: 4)
Journal of Science and Applications : Biomedicine     Open Access  
Journal of the Mechanical Behavior of Biomedical Materials     Hybrid Journal   (Followers: 13)
Journal of Trace Elements in Medicine and Biology     Hybrid Journal   (Followers: 1)
Journal of Tropical Microbiology and Biotechnology     Full-text available via subscription  
Journal of Yeast and Fungal Research     Open Access   (Followers: 1)
Marine Biotechnology     Hybrid Journal   (Followers: 4)
Meat Technology     Open Access  
Messenger     Full-text available via subscription  
Metabolic Engineering Communications     Open Access   (Followers: 3)
Metalloproteinases In Medicine     Open Access  
Microbial Biotechnology     Open Access   (Followers: 10)
MicroMedicine     Open Access   (Followers: 3)
Molecular and Cellular Biomedical Sciences     Open Access   (Followers: 1)
Molecular Biotechnology     Hybrid Journal   (Followers: 13)

        1 2 | Last

Journal Cover
Applied Food Biotechnology
Journal Prestige (SJR): 0.268
Citation Impact (citeScore): 1
Number of Followers: 3  

  This is an Open Access Journal Open Access journal
ISSN (Print) 2345-5357 - ISSN (Online) 2423-4214
Published by Shahid Beheshti University of Medical Sciences Homepage  [21 journals]
  • Linking Food Industry to “Green Plastics” – Polyhydroxyalkanoate
           (PHA) Biopolyesters from Agro-industrial By-Products for Securing Food
           Safety

    • Authors: Martin Koller
      Pages: 1 - 6
      Abstract: Aims and Scope(i) Why do we feel that the issue is important and timely? Research in renewable biopolymers as substitutes for full-carbon-backbone plastics from fossil resources presents a topical R&D field worldwide. This is due to the ongoing depletion of fossil resources, the growing piles of plastic waste and plastic pollution of marine environments, and the need to convert waste streams of different industrial origin in a value-added way. PHA have the potential to replace established petro-plastics both in bulk applications as packaging material and in niche applications, such as the medical, electronical, etc. field. Moreover, the close relation of PHA production and application to the food sector becomes more and more evident. Not only does food production provide numerous (ago) industrial by-products which can, on the one hand, be applied to boost growth kinetics of PHA-accumulation strains, as evidenced in the case of nitrogenaceous whey retentate, silage residues, or shrimps waste, and, on the other hand, act as feedstocks for PHA-biosynthesis under nutritionally unbalanced growth conditions, as demonstrated for carbonaceous surplus materials like whey permeate, lignocellulosics, glycerol, waste lipids, etc. Moreover, PHA are currently investigated as future materials contributing to safe and smart food storage and packaging, as shown by PHA´s beneficial gas barrier properties. Grace to the high compatibility of PHA with numerous organic and inorganic additives, a range of promising PHA-based blend of composite materials are accessible to design novel food packaging materials. This encompasses the application of lignocellulosic filler materials from rice, sugar, or wood production, and even the development of more sophisticated formulations resorting to the incorporation of functional nanoparticles into PHA matrixes. (ii) What communities are expected to participate in the Special Issue? Scientific community; Scholars of higher level; Industrialists (iii) How are the background and expertise of the authors relevant to the proposed Special Issue? List of topics for the Special Issue. 
      PubDate: 2019-01-02
      DOI: 10.22037/afb.v6i1.17979
      Issue No: Vol. 6, No. 1 (2019)
       
  • The Potential of Polyhydroxyalkanoate Production from Food Wastes

    • Authors: Christopher J. Brigham, Sebastian L. Riedel
      Pages: 7 - 18
      Abstract: Background and objective: Over 1 billion tons of foods are wasted every year (not consumed by humans or animals). Most of this waste ends up in landfills. As the global population increases, mankind must look for more sustainable means of living. A recently popular idea is the use of organic wastes as carbon feedstocks for fermentation that produces value added products. Polyhydroxyalkanoates are a family of bio-based, biodegradable polymers that can be produced in large quantities using food and food processing wastes as the main feedstocks. In many cases, biocatalysts have been engineered to efficiently use these waste compounds to produce large quantities of useful intracellular polyhydroxyalkanoates.Results and conclusion: In the current study, various polyhydroxyalkanoates were produced; each with different thermal and mechanical characteristics useful for different applications. If polyhydroxyalkanoate production facilities are established next to food waste accumulation sites (e.g., large landfills), potentials for the economical and sustainable polyhydroxyalkanoate production sound promising.Conflict of interest: The authors declare no conflict of interest.
      PubDate: 2019-01-02
      DOI: 10.22037/afb.v6i1.22542
      Issue No: Vol. 6, No. 1 (2019)
       
  • The potential application of Cupriavidus necator as polyhydroxyalkanoates
           producer and animal feed

    • Authors: Jiun Yee Chee, Manoj Lakshmanan, Iffa Farahin Jeepery, Nabila Husna Mohamad Hairudin, Kumar Sudesh
      First page: 19
      Abstract: Polyhydroxyalkanoates (PHAs) are environmentally friendly bioplastic compounds produced via the microbial route that offer an alternative to synthetic plastics due to their comparable durability and thermal stability. However, the high production cost as a result of carbon feedstock for microorganisms and the downstream recovery process narrow the usage of PHAs in various fields. Conversion of by-products from the food and agricultural industries such as waste cooking oil, glycerol, palm sludge oil, oil palm trunk sap and soya waste into PHAs is an attractive approach that can minimize and/or add value to waste. Recently, there has been a lot of interest in exploring not just PHAs as valued-added products, but also PHA-producing bacteria as a nutritional food or feed source. It has been previously reported that the PHA-producing bacterium, Cupriavidus necator, can be utilized as a single cell protein (SCP) in animal feed owing to its high protein content. The mealworm beetle (Tenebrio molitor) has also been used as the model insect to evaluate the efficacy of C. necator cells as a source of protein and to recover PHA granules at the same time. The European Union has imposed strict regulations on the type of feedstock that can be used to ensure that the food chain is safe. In addition, there are religious and cultural concerns. This review will focus on the nutritional value of C. necator as SCP and its safety as animal feed. The impact of using by-products from the agriculture and food industries as carbon feedstocks to produce SCP will be discussed, alongside societal acceptance of this practice.
      PubDate: 2019-01-02
      DOI: 10.22037/afb.v6i1.22234
      Issue No: Vol. 6, No. 1 (2019)
       
  • Biocomposites Based on Polyhydroxyalkanoates and Natural Fibres from
           Renewable Byproducts

    • Authors: Patrizia Cinelli, Norma Mallegni, Vito Gigante, Angela Montanari, Maurizia Seggiani, Maria Beatrice Coltelli, Simona Bronco, Andrea Lazzeri
      Pages: 35 - 43
      Abstract: Background and Objective: The use of biopolyesters and natural fibres or fillers for production of biobased composites has attracted interest of various application sectors ranging from packaging to automotive components and other high value applications in agreement with a bioeconomy approach. In the present paper biobased composites were produced by using compostable polymers degradable even in soil and marine water such as polyhydroxyalkanoates with natural fibres or fillers derived by food wastes (legumes by-products) and by wood industry.Material and Methods: Polyhydroxyalkanoates were processed with a biobased, biodegradable plasticizer such as acetyltributylcitrate and calcium carbonate as inorganic filler. The selected polymeric matrix was used for the production of composites with variable amounts of natural fibres. Green composites were manufactured by extrusion and injection moulding. Thermal, rheological, mechanical and morphological characterizations of the developed composites were performed.Results and Conclusion: The bio composites properties match the requirements for production of rigid food packaging or other single use items where the market is looking for more sustainable solutions versus the products actually used and hardly recyclable, opening a route for valorization of food residue. Pukanzsky’s model predicts with good accuracy the tensile behavior of the composites showing a medium intensity adhesion between fibres and polymer matrix in both cases analyzed.Conflict of interest: The authors declare no conflict of interest. 
      PubDate: 2019-01-02
      DOI: 10.22037/afb.v6i1.22039
      Issue No: Vol. 6, No. 1 (2019)
       
  • Bacterial Production of PHAs from Lipid-Rich by-Products

    • Authors: Lorenzo Favaro, Marina Basaglia, Jesus Enrique Gamero Rodriguez, Andrea Morelli, Omodele Ibraheem, Valentino Pizzocchero, Sergio Casella
      Pages: 45 - 52
      Abstract: Background and Objective: Due to oil shortage and environmental problems, synthetic plastics will surely be replaced by alternative, biodegradable materials. A possible good example could be polyhydroxyalkanoates, and the inexpensive agricultural fatty byproducts could be usefully converted to polyhydroxyalkanoates by properly selected and/or developed microbes.Material and Methods: Among the more common by-products available, a variety of lipid-rich residues have been explored as substrate, such as crude glycerol from biodiesel, biodiesel obtained from fatty residues, and, from slaughterhouse, bacon rind, udder and tallow. In this paper, several new isolates and collection PHA-producing microbes have been screened for both lipolytic activities and polyhydroxyalkanoates production. The soil proved to be the most promising mining place to find new interesting microbial species, even better than more specific and selective environments such as slaughterhouses.Results and Conclusion: Remarkably, two of the collection strains used here, known to be polyhydroxyalkanoates producers, resulted as really promising, being able to grow directly on all the substrates tested and to produce variable amounts of the polymer, including the co-polymers P (3HB-co-3HV).Conflict of interest: The authors declare no conflict of interest.
      PubDate: 2019-01-02
      DOI: 10.22037/afb.v6i1.22246
      Issue No: Vol. 6, No. 1 (2019)
       
  • Paracoccus sp. Strain LL1 as a Single Cell Factory for the Conversion of
           Waste Cooking Oil to Polyhydroxyalkanoates and Carotenoids

    • Authors: Prasun Kumar, Beom Soo Kim
      Pages: 53 - 60
      Abstract: Background and objective: Polyhydroxyalkanoates have drawn significant attention as alternative to petroleum-based plastics; however, their industrial production is still hindered by the costly feed materials. Co-generation of other high-value products in addition to polyhydroxyalkanoate by the same microbial strains can be helpful in alleviating overall production cost up to 50%. This study for the first time demonstrates that polyhydroxyalkanoate and astaxanthin-rich carotenoids can be co-produced by Paracoccus sp. LL1 using waste cooking oil as substrate.Material and methods: The halophilic strain of Paracoccus sp. LL1 was grown under batch fermentation using mineral media supplemented with 1% (v v-1) waste cooking oil. Different surfactants were used to improve substrate utilization. Polyhydroxyalkanoate obtained after the fermentation was characterized by fluorescent microscopy, gas chromatography, and Fourier Transform Infra-Red spectroscopy.Results and conclusion: Oil as a substrate, led to 1.0 g l-1 poly (3-hydroxybutyrate-co-3-hydroxyvalerate) with concomitant production of 0.89 mg l-1 of carotenoids after 96 h. An enhancement of 2.7-folds in total cell dry mass was achieved when 0.1% (v v-1) Tween-80 was used as surfactant for ease in oil metabolism. Paracoccus sp. LL1 has the potential to serve as a single cell factory for bioconversion of cheap substrates into high value products.Conflict of interest: The authors declare no conflict of interest.
      PubDate: 2019-01-02
      DOI: 10.22037/afb.v6i1.21628
      Issue No: Vol. 6, No. 1 (2019)
       
  • Camelina Oil as a Promising Substrate for mcl-PHA Production in
           Pseudomonas sp. Cultures

    • Authors: Daniel Bustamante, Marta Tortajada, Daniel Ramon, Antonia Rojas
      Pages: 61 - 70
      Abstract: Background and objective: Polyhydroxyalkanoates are biodegradable polyesters synthesized by some prokaryotic organisms from renewable sources. Medium-chain-length Polyhydroxyalkanoates show interesting properties as elastic and adhesive specialty polymers. Medium-chain-length Polyhydroxyalkanoates producers such as Pseudomonas sp. have demonstrated high yields on fats and oils. Camelina sativa is non-food chain competing crop, whose seed contain about 43% (w w-1) oil in dry matter with about 90% (w w-1) of unsaturated fatty acids. Camelina oil was for the first time tested for the production of medium-chainlength Polyhydroxyalkanoates by different Pseudomonas strains.Material and methods: The production of Polyhydroxyalkanoate was evaluated in a nitrogen-limited minimal medium supplemented with crude Camelina oil or saponified oil to compare the production capability of Pseudomonas sp. strains. A phosphates-limited medium was used to optimize polyhydroxyalkanoate production in fed-batch assays. Experiments were carried out by duplicates.Results and conclusion: Pseudomonas resinovorans was used for direct fermentation of Camelina oil without prior hydrolysis. A first approach to process development in bioreactor has provided up to 40% (w w-1) polymer content, matching highest medium-chain-length polyhydroxyalkanoates titer reported from plant oils (13.2 g l-1). Camelina oil was shown to be a suitable substrate for production of medium-chain-length polyhydroxyalkanoates. This non-food vegetable oil gave good results for Pseudomonas resinovorans DSM 21078 without any pre-treatment.Conflict of interest: The authors declare no conflict of interest.
      PubDate: 2019-01-02
      DOI: 10.22037/afb.v6i1.21635
      Issue No: Vol. 6, No. 1 (2019)
       
  • Production of medium-chain length polyhydroxyalkanoates by Pseudomonas
           citronellolis grown in apple pulp waste

    • Authors: Ana Teresa Rebocho, Filomena Freitas, Joao Ricardo Pereira, Luisa Alexandra Neves, Vitor Delgado Alves, Chantal Sevrin, Christian Grandfils, Maria A Reis
      First page: 71
      Abstract: Background and Objective: Apple pulp waste generated by the fruit processing industry is a sugar-rich material with great potential to be used as a feedstock for production of value-added microbial products. The aim of this work was to use this feedstock for the cultivation of Pseudomonas citronellolis and production of medium-chain-length polyhydroxyalkanoates, a natural elastomer.Material and Methods: The solid fraction of the apple pulp waste was discarded and the soluble fraction, rich in fructose (17.7 g/L) and glucose (7.5 g/L), was used for the batch bioreactor cultivation of P. citronellolis NNRL B-2504.Results and Conclusion: P. citronellolis reached a polymer content in the biomass of 30wt.% with a volumetric productivity of 0.61 g/L.day. The polymer was mainly composed of 3-hydroxydecanoate (68%) and 3-hydroxyoctanoate (22%), and had a molecular weight of 3.7×105 Da. It presented glass and melting temperatures of -12 and 53 °C, respectively, and a thermal degradation temperature of 296 °C. The polymer’s films were dense, ductile and permeable to oxygen and carbon dioxide. These results demonstrated apple pulp waste is a suitable feedtsock for the production of a biopolymer with properties that render it a promising alternative to some synthetic petrochemical-derived polyesters.
      PubDate: 2019-01-02
      DOI: 10.22037/afb.v6i1.21793
      Issue No: Vol. 6, No. 1 (2019)
       
  • Interconnection of waste chicken feather biodegradation and keratinase and
           mcl-PHA production employing Pseudomonas putida KT2440

    • Authors: Iva Pernicova, Vojtech Enev, Ivana Marova, Stanislav Obruca
      First page: 83
      Abstract: Waste chicken feather is an important waste product of poultry processing industry which is annually produced in substantial amounts. Hence, wise management of this waste is desirable. In this work we aimed at feather biodegradation by selected bacterial strain capable of utilization of chicken feather as sole carbon source – Pseudomonas putida KT2440. To utilize feather, bacterial culture excreted keratinase which can be easily isolated after biodegradation process and which, therefore, represent interesting side product of intended technology. Furthermore, since the bacterial culture employed for feather degradation is capable of mcl-PHA accumulation, we have investigated potential interconnection of feather degradation and mcl-PHA production. During cultivation on waste feather, bacteria did not accumulate detectable amount of mcl-PHA, nevertheless, when metabolically active bacterial cells after feather biodegradation were transferred into nitrogen limited mineral media high mcl-PHA content  61 % of cell dry weight in microbial cells was reached, the polymer consisted of 3-hydroxyhaxanoate (27.2 mol. %) and 3-hydoxyoctanoate (72.8 mol. %) monomer units. Therefore, this works demonstrates possible interconnection of feather biodegradation with keratinase and mcl-PHA production.
      PubDate: 2019-01-02
      DOI: 10.22037/afb.v6i1.21429
      Issue No: Vol. 6, No. 1 (2019)
       
 
 
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