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  Subjects -> BIOLOGY (Total: 3134 journals)
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BIOTECHNOLOGY (236 journals)                  1 2 | Last

Showing 1 - 200 of 237 Journals sorted alphabetically
3 Biotech     Open Access   (Followers: 8)
Advanced Biomedical Research     Open Access  
Advances in Bioscience and Biotechnology     Open Access   (Followers: 14)
Advances in Genetic Engineering & Biotechnology     Hybrid Journal   (Followers: 8)
African Journal of Biotechnology     Open Access   (Followers: 6)
Algal Research     Partially Free   (Followers: 10)
American Journal of Biochemistry and Biotechnology     Open Access   (Followers: 64)
American Journal of Bioinformatics Research     Open Access   (Followers: 7)
American Journal of Polymer Science     Open Access   (Followers: 31)
Anadolu University Journal of Science and Technology : C Life Sciences and Biotechnology     Open Access  
Animal Biotechnology     Hybrid Journal   (Followers: 8)
Annales des Sciences Agronomiques     Full-text available via subscription  
Applied Biochemistry and Biotechnology     Hybrid Journal   (Followers: 43)
Applied Bioenergy     Open Access  
Applied Biosafety     Hybrid Journal  
Applied Food Biotechnology     Open Access   (Followers: 3)
Applied Microbiology and Biotechnology     Hybrid Journal   (Followers: 63)
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: 8)
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)
Bio-Algorithms and Med-Systems     Hybrid Journal   (Followers: 2)
Bio-Research     Full-text available via subscription   (Followers: 2)
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  
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)
Biomarkers in Drug Development     Partially Free   (Followers: 1)
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: 21)
Biosimilars     Open Access   (Followers: 1)
Biosurface and Biotribology     Open Access  
Biotechnic and Histochemistry     Hybrid Journal   (Followers: 2)
BioTechniques : The International Journal of Life Science Methods     Full-text available via subscription   (Followers: 28)
Biotechnologia Acta     Open Access   (Followers: 1)
Biotechnologie, Agronomie, Société et Environnement     Open Access   (Followers: 2)
Biotechnology     Open Access   (Followers: 5)
Biotechnology & Biotechnological Equipment     Open Access   (Followers: 4)
Biotechnology Advances     Hybrid Journal   (Followers: 33)
Biotechnology and Applied Biochemistry     Hybrid Journal   (Followers: 44)
Biotechnology and Bioengineering     Hybrid Journal   (Followers: 155)
Biotechnology and Bioprocess Engineering     Hybrid Journal   (Followers: 5)
Biotechnology and Genetic Engineering Reviews     Hybrid Journal   (Followers: 13)
Biotechnology and Health Sciences     Open Access   (Followers: 1)
Biotechnology and Molecular Biology Reviews     Open Access   (Followers: 1)
Biotechnology Annual Review     Full-text available via subscription   (Followers: 5)
Biotechnology for Biofuels     Open Access   (Followers: 10)
Biotechnology Frontier     Open Access   (Followers: 2)
Biotechnology Journal     Hybrid Journal   (Followers: 16)
Biotechnology Law Report     Hybrid Journal   (Followers: 4)
Biotechnology Letters     Hybrid Journal   (Followers: 34)
Biotechnology Progress     Hybrid Journal   (Followers: 39)
Biotechnology Reports     Open Access  
Biotechnology Research International     Open Access   (Followers: 1)
Biotechnology Techniques     Hybrid Journal   (Followers: 10)
Biotecnología Aplicada     Open Access  
Bioteknologi (Biotechnological Studies)     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: 2)
Computer Methods and Programs in Biomedicine     Hybrid Journal   (Followers: 8)
Contributions to Tobacco Research     Open Access   (Followers: 2)
Copernican Letters     Open Access   (Followers: 1)
Critical Reviews in Biotechnology     Hybrid Journal   (Followers: 20)
Crop Breeding and Applied Biotechnology     Open Access   (Followers: 3)
Current Bionanotechnology     Hybrid Journal  
Current Biotechnology     Hybrid Journal   (Followers: 4)
Current Opinion in Biomedical Engineering     Hybrid Journal   (Followers: 1)
Current Opinion in Biotechnology     Hybrid Journal   (Followers: 56)
Current Pharmaceutical Biotechnology     Hybrid Journal   (Followers: 9)
Current Research in Bioinformatics     Open Access   (Followers: 12)
Current Trends in Biotechnology and Chemical Research     Open Access   (Followers: 3)
Current trends in Biotechnology and Pharmacy     Open Access   (Followers: 8)
EBioMedicine     Open Access  
Electronic Journal of Biotechnology     Open Access  
Entomologia Generalis     Full-text available via subscription  
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: 6)
Frontiers in Systems Biology     Open Access   (Followers: 2)
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  
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)
IIOAB Letters     Open Access  
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)
Industrial Biotechnology     Hybrid Journal   (Followers: 18)
International Biomechanics     Open Access  
International Journal of Bioinformatics Research and Applications     Hybrid Journal   (Followers: 13)
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: 2)
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 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: 4)
Iranian Journal of Biotechnology     Open Access  
ISABB Journal of Biotechnology and Bioinformatics     Open Access  
Italian Journal of Food Science     Open Access   (Followers: 1)
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 Biosecurity, Biosafety and Biodefense Law     Hybrid Journal   (Followers: 3)
Journal of Biotechnology     Hybrid Journal   (Followers: 68)
Journal of Biotechnology and Strategic Health Research     Open Access  
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  
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 Essential Oil Research     Hybrid Journal   (Followers: 2)
Journal of Experimental Biology     Full-text available via subscription   (Followers: 24)
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: 16)
Journal of Integrative Bioinformatics     Open Access  
Journal of International Biotechnology Law     Hybrid Journal   (Followers: 3)
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: 11)
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: 11)
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)
Messenger     Full-text available via subscription  
Metabolic Engineering Communications     Open Access   (Followers: 4)
Metalloproteinases In Medicine     Open Access  
Microalgae Biotechnology     Open Access   (Followers: 2)
Microbial Biotechnology     Open Access   (Followers: 9)
MicroMedicine     Open Access   (Followers: 3)
Molecular and Cellular Biomedical Sciences     Open Access  
Molecular Biotechnology     Hybrid Journal   (Followers: 13)
Molecular Genetics and Metabolism Reports     Open Access   (Followers: 3)
Nanobiomedicine     Open Access  
Nanobiotechnology     Hybrid Journal   (Followers: 2)
Nanomaterials and Nanotechnology     Open Access  
Nanomaterials and Tissue Regeneration     Open Access  
Nanomedicine and Nanobiology     Full-text available via subscription  
Nanomedicine Research Journal     Open Access  
Nanotechnology Reviews     Hybrid Journal   (Followers: 5)
Nature Biotechnology     Full-text available via subscription   (Followers: 535)

        1 2 | Last

Journal Cover Applied Biochemistry and Biotechnology
  [SJR: 0.575]   [H-I: 80]   [43 followers]  Follow
    
   Hybrid Journal Hybrid journal (It can contain Open Access articles)
   ISSN (Print) 1599-0291 - ISSN (Online) 0273-2289
   Published by Springer-Verlag Homepage  [2350 journals]
  • RNA-Seq Analysis of Antibiotic-Producing Bacillus subtilis SC-8 Reveals a
           Role for Small Peptides in Controlling PapR Signaling
    • Authors: Byung Wook Yang; In-Cheol Yeo; Jae Hee Choi; Chandra Datta Sumi; Young Tae Hahm
      Pages: 359 - 369
      Abstract: Bacillus subtilis SC-8 (BSSC8) shows a narrow antimicrobial activity against the Bacillus cereus group. Previously, B. cereus-derived PapR as a signal peptide to stimulate PlcR, which plays a significant role in regulating the transcription of virulence factors, was assumed to stimulate antibiotic production in BSSC8. To better understand the functional role of PapR in the antibiotic production of BSSC8 and the interspecies interaction, the global transcriptomic profiling of BSSC8 was investigated using RNA-Seq in this study. Small peptides derived from B. cereus wild type (WTBC) and a papR-deleted mutant strain (MTBC) were individually supplied to BSSC8 cultures, and changes in global transcription levels were compared by RNA-Seq. In the presence of WTBC small peptides, more genes (80.9%) were significantly upregulated than in cells exposed to MTBC small peptides. Specifically, 48.8 and 83.4% of genes involved in glycolysis and the TCA cycle, respectively, showed changes in transcription levels in response to small peptides from both strains. Of the genes showing the alterations, 35.0% (glycolysis) and 60.0% (TCA cycle) of transcripts were significantly regulated only in response to WTBC-derived small peptides. Furthermore, the expression of biosynthetic genes encoding several known antibiotics in BSSC8 was further decreased in response to WTBC small peptides.
      PubDate: 2018-06-01
      DOI: 10.1007/s12010-017-2653-7
      Issue No: Vol. 185, No. 2 (2018)
       
  • Chitosan-Based Surface Molecularly Imprinted Polymer Microspheres for
           Sustained Release of Sinomenine Hydrochloride in Aqueous Media
    • Authors: Hanqiu Chen; Wen Zhang; Ning Yang; Chongmin Chen; Mingliang Zhang
      Pages: 370 - 384
      Abstract: The surface molecular imprinting technique has been proposed as a prospective strategy for template molecule recognition and separation by devising the recognition sites on the surface of imprinted materials. The purpose of this study was to establish a novel drug delivery system which was developed by surface molecular imprinting method using β-cyclodextrin (β-CD)-grafted chitosan (CS) (CS-g-β-CD) microspheres as matrix and sinomenine hydrochloride (SM) as the template molecule. By adjusting the amount of functional monomer and cross-linking agent, we got the more excellent adsorption of CS-g-β-CD molecularly imprinted polymers (MIPs-CS-g-β-CD). When the amount of functional monomer was 6 mmol and cross-linking agent was 20 mmol, the maximum binding capacity of MIPs and non-imprinted polymers (NIPs) was 55.9 mg/g and 37.2 mg/g, respectively. The results indicated that the recognition of SM with MIPs was superior to NIPs. The adsorption isotherms of MIPs-CS-g-β-CD indicated that the adsorption behavior fitted better to the Langmuir model, which showed that the adsorption process of polymer was monomolecular layer. In in vitro drug release studies, the accumulative release amount of MIPs-CS-g-β-CD was up to 78% within 24 h. MIPs exhibited an excellent controlled SM release profile without burst release and the mechanism of SM release was shown to conform to non-Fick diffusion. Therefore, MIPs-CS-g-β-CD were successfully applied to extraction of SM and used as the materials for drug delivery system.
      PubDate: 2018-06-01
      DOI: 10.1007/s12010-017-2658-2
      Issue No: Vol. 185, No. 2 (2018)
       
  • Enzymatic Production of Glutathione Coupling with an ATP Regeneration
           System Based on Polyphosphate Kinase
    • Authors: Hao Cao; Chengcheng Li; Jing Zhao; Fang Wang; Tianwei Tan; Luo Liu
      Pages: 385 - 395
      Abstract: Glutathione (GSH) is an important reducing agent in the living cells. It is synthesized by a two-step reaction and requires two molecules of adenosine triphosphate (ATP) for one molecule GSH. The enzymatic cascade reaction in vitro is a promising approach to achieve a high titer and limit side reactions; although, a cost-effective phosphate donor for ATP regeneration is required. Triphosphate (PolyP(3)), tetraphosphate (PolyP(4)), and hexametaphosphate (PolyP(6)) were investigated in this study. Triphosphate inhibited the bifunctional GSH synthetase (GshF) from Streptococcus agalactiae, while no significant inhibition was observed by adding hexametaphosphate. The polyphosphate kinase from Corynebacterium glutamicum was hence investigated to use hexametaphosphate for regeneration of ATP. Further, the orthogonal experiment, which includes seven factors (buffer concentration, pH value, ADP concentration, GshF dosage, polyphosphate kinase (PPK) dosage, reaction temperature, substrate ratio of amino acid, and reaction times), indicated that the capacity of buffer is the most significant factor of the reaction conditions for enzymatic production of glutathione coupling with a PPK-based ATP regeneration system. After optimizing the Mg2+ concentration, the reaction was scaled up to 250 mL in a stirred reactor with pH feedback control to stabilize the pH value of reaction system and nitrogen protection to avoid the oxidation of product. A yield of 12.32 g/L was achieved. This work provided a potential GshF-based enzymatic way coupling the PPK-based ATP regeneration to product GSH in the optimal conditions towards cost-effectiveness at the industrial scale.
      PubDate: 2018-06-01
      DOI: 10.1007/s12010-017-2664-4
      Issue No: Vol. 185, No. 2 (2018)
       
  • Redesigning of Microbial Cell Surface and Its Application to Whole-Cell
           Biocatalysis and Biosensors
    • Authors: Lei Han; Yukun Zhao; Shan Cui; Bo Liang
      Pages: 396 - 418
      Abstract: Microbial cell surface display technology can redesign cell surfaces with functional proteins and peptides to endow cells some unique features. Foreign peptides or proteins are transported out of cells and immobilized on cell surface by fusing with anchoring proteins, which is an effective solution to avoid substance transfer limitation, enzyme purification, and enzyme instability. As the most frequently used prokaryotic and eukaryotic protein surface display system, bacterial and yeast surface display systems have been widely applied in vaccine, biocatalysis, biosensor, bioadsorption, and polypeptide library screening. In this review of bacterial and yeast surface display systems, different cell surface display mechanisms and their applications in biocatalysis as well as biosensors are described with their strengths and shortcomings. In addition to single enzyme display systems, multi-enzyme co-display systems are presented here. Finally, future developments based on our and other previous reports are discussed.
      PubDate: 2018-06-01
      DOI: 10.1007/s12010-017-2662-6
      Issue No: Vol. 185, No. 2 (2018)
       
  • Evaluation of Octyl-β-D-Glucopyranoside (OGP) for Cytotoxic, Hemolytic ,
           Thrombolytic, and Antibacterial Activity
    • Authors: Murugesan Dinesh; Subramanyam Deepika; Rajendran HarishKumar; Chinnadurai Immanuel Selvaraj; Selvaraj Mohana Roopan
      Pages: 450 - 463
      Abstract: The current study indicates that octyl-β-D-glucopyranoside (OGP) as a detergent which has the ability to make the lipid layer stiff. OGP was subjected for toxicity studies and in vitro cytotoxicty assays on cancerous HeLa and non-cancerous myoblasts H9c2 cell lines. Test against aquatic organisms were carried out in Artemia salina and LC50 values were calculated. Hemolytic activity tested for blood bio-compalibity showed hemolysis rate of 10–16%, followed by thrombolytic activity to burst the clots in blood. Also, the samples showed good lysis when compared to the standard streptokinase. Furthermore, α-amylase activity has been carried out to check the inhibition of α-amylase by the OGP. Finally, antibacterial activity has been tested against four different pathogens and their MIC values have been calculated.
      PubDate: 2018-06-01
      DOI: 10.1007/s12010-017-2661-7
      Issue No: Vol. 185, No. 2 (2018)
       
  • Isolation and Purification of Condensed Tannin from the Leaves and
           Branches of Prunus cerasifera and Its Structure and Bioactivities
    • Authors: Wei Song; Shao-Tong Qin; Fei-Xiang Fang; Zhen-Jiang Gao; Dan-Dan Liang; Lu-Lu Liu; Hong-Tao Tian; Hai-Bo Yang
      Pages: 464 - 475
      Abstract: Prunus cerasifera has a rich resource and a weak utilization rate and its biological functions have been investigated. We found that the contents of total phenol (TP) in leaves and branches of Prunus cerasifera were 117.8 ± 8.8 and 100.04 ± 0.9 mg/g, respectively; the contents of soluble condensed tannin (SCT) were 73.95 ± 0.9 and 78.65 ± 4.1 mg/g, respectively; the structure of SCT containing afzelechin/epiafzelechin, catechin/epicatechin, and atechin/epicatechin as the main units and the SCT from leaves and branches exhibited better anti-tyrosinase and antioxidant activities. This study could clarify Prunus cerasifera condensed tannin resource availability and lay a theoretical foundation for its development as a natural antioxidant and tyrosinase inhibitor.
      PubDate: 2018-06-01
      DOI: 10.1007/s12010-017-2635-9
      Issue No: Vol. 185, No. 2 (2018)
       
  • Exploring the Degradation of Gallotannins Catalyzed by Tannase Produced by
           Aspergillus niger GH1 for Ellagic Acid Production in Submerged and
           Solid-State Fermentation
    • Authors: Mónica L. Chávez-González; Sylvain Guyot; Raul Rodríguez-Herrera; Arely Prado-Barragán; Cristóbal N. Aguilar
      Pages: 476 - 483
      Abstract: Due to great interest on producing bioactive compounds for functional foods and biopharmaceuticals, it is important to explore the microbial degradation of potential sources of target biomolecules. Gallotannins are polyphenols present in nature, an example of them is tannic acid which is susceptible to enzymatic hydrolysis. This hydrolysis is performed by tannase or tannin acyl hydrolase, releasing in this way, biomolecules with high-added value. In the present study, chemical profiles obtained after fungal degradation of tannic acid under two bioprocesses (submerged fermentation (SmF) and solid state fermentation (SSF)) were determined. In both fermentation systems (SmF and SSF), Aspergillus niger GH1 strain and tannic acid as a sole carbon source and inducer were used (the presence of tannic acid promotes production of enzyme tannase). In case of SSF, polyurethane foam (PUF) was used like as support of fermentation; culture medium only was used in case of submerged fermentation. Fermentation processes were monitored during 72 h; samples were taken kinetically every 8 h; and all extracts obtained were partially purified to obtain polyphenolic fraction and then were analyzed by liquid chromatography-mass spectrometry (LC-MS). Molecules like gallic acid and n-galloyl glucose were identified as intermediates in degradation of tannic acid; during SSF was identified ellagic acid production. The results obtained in this study will contribute to biotechnological production of ellagic acid.
      PubDate: 2018-06-01
      DOI: 10.1007/s12010-017-2663-5
      Issue No: Vol. 185, No. 2 (2018)
       
  • IL-21 as a Predictor of Sustained Virologic Response in Patients with
           Chronic Hepatitis C Virus Infection
    • Authors: Halla Mohamed Ragab; Nabila Abd El Maksoud; Mona A. Amin; Mohab H. Halim; Nour A. Abdulla; Abdelkarim Kamel; Shorouk M. Moussa
      Pages: 484 - 493
      Abstract: Hepatitis C virus (HCV) infection is a significant public health problem. The crucial role of interleukin (IL)-21 in HCV has been established. Thus, we aimed to investigate the association of serum IL-21 levels with the virological response to interferon (IFN)-based therapy in a group of Egyptian patients with chronic hepatitis C (CHC). Clinical data were collected from 58 HCV-positive Egyptian patients treated with IFN/ribavirin therapy and 10 non-HCV-infected healthy subjects. Liver and renal function tests, complete blood count, viral markers, and pretreatment IL-21 levels were determined in all patients and healthy controls. Patients who achieved sustained virologic response (SVR) had higher pretreatment median serum IL-21 levels than those who did not. Thus, this study concluded that higher pretreatment serum IL-21 may be useful in predicting SVR in CHC patients.
      PubDate: 2018-06-01
      DOI: 10.1007/s12010-017-2669-z
      Issue No: Vol. 185, No. 2 (2018)
       
  • Efficient Bioconversion of High Concentration Phytosterol Microdispersion
           to 4-Androstene-3,17-Dione (AD) by Mycobacterium sp. B3805
    • Authors: Rodrigo A. Mancilla; Cedric Little; Alejandro Amoroso
      Pages: 494 - 506
      Abstract: Low solubility of sterols in aqueous media limits efficient steroid production mediated by biocatalytic microorganisms such as Mycobacterium. Sterol emulsion technologies have been developed with low success rates, largely due to the complexity of generating stable and bioavailable particles. In this study, several aqueous dispersions of sterols in-water of different particle sizes were bioconverted to 4-androstene-3,17-dione (AD) in a solvent-free environment, using a classic microorganism Mycobacterium sp. B3805 as a model system. According to our results, the high concentration (20 g/L) phytosterol dispersions with the smallest particle size tested (370 nm) achieved up to 54% (7.4 g/L) AD production yield in 11 days. Moreover, the use of 0.1 biomass/sterols ratio in a complex bioconversion media containing yeast extract, and a 1:1 glucose/microdispersion ratio in the presence of the surfactant DK-Ester P-160 (HLB16), allowed homogenization and increased microdispersion stability, thus achieving the best results using emulsion technologies to date.
      PubDate: 2018-06-01
      DOI: 10.1007/s12010-017-2665-3
      Issue No: Vol. 185, No. 2 (2018)
       
  • Structural Characterization and In Vitro Antitumor Activity of a Novel
           Exopolysaccharide from Lachnum YM130
    • Authors: Ping Xu; Ruyue Yuan; Guohua Hou; Jinglei Li; Ming Ye
      Pages: 541 - 554
      Abstract: Exopolysaccharide of Lachnum YM130 (LEP) was purified by diethylaminoethyl cellulose 52 and Sepharose CL-6B column chromatography. LEP-2a was identified to be a homogeneous component with an average molecular weight of 1.31 × 106 Da, which was consisted of mannose and galactose in a molar ratio of 3.8:1.0. The structure of LEP-2a was characterized by methylation analysis, FT-IR analysis, and NMR analysis. Results indicated that LEP-2a was a galactomannan with a backbone, composed of 1,2-linked-α-D-Manp, 1,2,6-linked-α-D-Manp, 1,3,4-linked-α-D-Manp, and 1,3-linked-β-D-Galp, which was substituted at O-2, O-3, O-4, and O-6 by branches. In vitro antitumor activity assay proved that LEP-2a could significantly enhance the inhibitory effectiveness of 5-FU on Hela cells at the concentrations of 100, 200, 300, and 400 μg/mL. The above results suggested that LEP-2a could be seen as a potential source for developing novel antineoplastic agents.
      PubDate: 2018-06-01
      DOI: 10.1007/s12010-017-2668-0
      Issue No: Vol. 185, No. 2 (2018)
       
  • Design and Assessment of a Dynamic Perfusion Bioreactor for Large Bone
           Tissue Engineering Scaffolds
    • Authors: Birru Bhaskar; Robert Owen; Hossein Bahmaee; Parcha Sreenivasa Rao; Gwendolen C. Reilly
      Pages: 555 - 563
      Abstract: Bioreactors can be used to apply fluid flow in vitro to scaffolds to improve mass transport of media and apply mechanical forces to cells. In this study, we developed and tested an autoclavable, modular perfusion bioreactor suitable for large scaffolds. We investigated the effects of fluid flow induced shear stress (FFSS) on osteogenic differentiation of human embryonic stem cell-derived mesenchymal progenitors (hES-MP cells) cultured on large polyurethane (PU) scaffolds (30 mm diameter × 5 mm thickness) in osteogenesis induction media (OIM). After seeding, scaffolds were either maintained in static conditions or transferred to the bioreactor 3 days post-seeding and a continuous flow rate of 3.47 mL/min was applied. Alkaline phosphatase activity (ALP) was used to evaluate osteogenic differentiation and resazurin salt reduction (RR) to measure metabolic activity after 10 days. Cultures subjected to flow contained significantly more metabolically active cells and higher total DNA content, as well as significantly higher ALP activity compared to scaffolds grown in static culture. These results confirm the responsiveness of hES-MP cells to fluid flow stimuli, and present a cost-effective, user-friendly bioreactor capable of supporting the growth and differentiation of mesenchymal progenitor cells within scaffolds capable of filling large bone defects.
      PubDate: 2018-06-01
      DOI: 10.1007/s12010-017-2671-5
      Issue No: Vol. 185, No. 2 (2018)
       
  • Predicting Promiscuous T Cell Epitopes for Designing a Vaccine Against
           Streptococcus pyogenes
    • Authors: Samira Ebrahimi; Hassan Mohabatkar; Mandana Behbahani
      Abstract: One of the most dangerous human pathogens with high prevalence worldwide is Streptococcus pyogenes, which has major impacts on global morbidity and mortality. A major challenge for S. pyogenes vaccine development is the detection of epitopes that confer protection from infection by multiple S. pyogenes types. Our aim was to identify the most conserved and immunogenic antigens of S. pyogenes, which can be a potential candidate for vaccine design in the future. Eight important surface proteins were analyzed. Using different prediction servers, strongest epitopes were selected. They had the ability to stimulate the humoral and cell-mediated immune system. Molecular docking was performed for measuring free-binding energy of selected epitopes. Seven epitopes from three surface proteins were selected as potential candidates for vaccine development. Conservation of selected epitopes among different Streptococcus types was checked. Further in vitro and in vivo tests are required to validate the suitability of the epitopes for vaccine design.
      PubDate: 2018-06-11
      DOI: 10.1007/s12010-018-2804-5
       
  • One-Pot Enzymatic Synthesis of d -Arylalanines Using Phenylalanine Ammonia
           Lyase and l -Amino Acid Deaminase
    • Authors: Longbao Zhu; Guoqiang Feng; Fei Ge; Ping Song; Taotao Wang; Yi Liu; Yugui Tao; Zhemin Zhou
      Abstract: The phenylalanine ammonia-lyase (AvPAL) from Anabaena variabilis catalyzes the amination of substituent trans-cinnamic acid (t-CA) to produce racemic d,l-enantiomer arylalanine mixture owing to its low stereoselectivity. To produce high optically pure d-arylalanine, a modified AvPAL with high d-selectivity is expected. Based on the analyses of catalytic mechanism and structure, the Asn347 residue in the active site was proposed to control stereoselectivity. Therefore, Asn347 was mutated to construct mutant AvPAL-N347A, the stereoselectivity of AvPAL-N347A for d-enantiomer arylalanine was 2.3-fold higher than that of wild-type AvPAL (WtPAL). Furthermore, the residual l-enantiomer product in reaction solution could be converted into the d-enantiomer product through stereoselective oxidation by PmLAAD and nonselective reduction by reducing agent NH3BH3. At optimal conditions, the conversion rate of t-CA and optical purity (enantiomeric excess (eeD)) of d-phenylalanine reached 82% and exceeded 99%, respectively. The two enzymes displayed activity toward a broad range of substrate and could be used to efficiently synthesize d-arylalanine with different groups on the phenyl ring. Among these d-arylalanines, the yield of m-nitro-d-phenylalanine was highest and reached 96%, and the eeD exceeded 99%. This one-pot synthesis using AvPAL and PmLAAD has prospects for industrial application.
      PubDate: 2018-06-08
      DOI: 10.1007/s12010-018-2794-3
       
  • Recent Trends in the Fabrication of Starch Nanofibers: Electrospinning and
           Non-electrospinning Routes and Their Applications in Biotechnology
    • Authors: Roqia Ashraf; Hasham S. Sofi; Aijaz Malik; Mushtaq A. Beigh; Rabia Hamid; Faheem A. Sheikh
      Abstract: Electrospinning a versatile and the most preferred technique for the fabrication of nanofibers has revolutionized by opening unlimited avenues in biomedical fields. Presently, the simultaneous functionalization and/or post-modification of as-spun nanofibers with biomolecules has been explored, to serve the distinct goals in the aforementioned field. Starch is one of the most abundant biopolymers on the earth. Besides, being biocompatible and biodegradable in nature, it has unprecedented properties of gelatinization and retrogradation. Therefore, starch has been used in numerous ways for wide range of applications. Keeping these properties in consideration, the present article summarizes the recent expansion in the fabrication of the pristine/modified starch-based composite scaffolds by electrospinning along with their possible applications. Apart from electrospinning technique, this review will also provide the comprehensive information on various other techniques employed in the fabrication of the starch-based nanofibers. Furthermore, we conclude with the challenges to be overcome in the fabrication of nanofibers by the electrospinning technique and future prospects of starch-based fabricated scaffolds for exploration of its applications.
      PubDate: 2018-06-08
      DOI: 10.1007/s12010-018-2797-0
       
  • Methane Production by Co-Digesting Vinasse and Whey in an AnSBBR: Effect
           of Mixture Ratio and Feed Strategy
    • Authors: Giovanna Lovato; Roberta Albanez; Marianne Triveloni; Suzana M. Ratusznei; José A. D. Rodrigues
      Abstract: The most common approach to deal with vinasse (sugarcane stillage) is fertigation, but this technique compromises soil structure and surrounding water bodies. A possible solution is to transport vinasse to local cheese whey producers and perform the co-digestion of these wastewaters together, reducing their organic load and generating bioenergy. Therefore, this study investigated the application of an AnSBBR (anaerobic sequencing batch biofilm reactor) operated in batch and fed-batch mode, co-digesting vinasse and whey at 30 °C. The effect of influent composition and feeding strategy was assessed. In all conditions, the system achieved high organic matter removal (approximately 83%). Increasing the percentage of vinasse from 0 to 100% in the influent resulted in a decrease in methane productivity (76.3 to 51.1 molCH4 m−3 day−1) and yield (12.7 to 9.1 molCH4 kgCOD−1), but fed-batch mode operation improved reactor performance (73.0 molCH4 m−3 day−1 and 11.5 molCH4 kgCOD−1). From the kinetic metabolic model, it was possible to infer that, at the best condition, methane is produced in a similar way from the acetoclastic and hydrogenotrophic routes. A scheme of four parallel reactors with a volume of 16,950 m3 each was proposed in the scale-up estimation, with an energy recovery estimated in 28,745 MWh per month.
      PubDate: 2018-06-07
      DOI: 10.1007/s12010-018-2802-7
       
  • Evaluation of Antidiabetic Potential of S arcostemma brevistigma Wight
           & Arn. Using Alloxan-Induced Diabetic Murine Model
    • Authors: Krishnamoorthy Vijayalakshmi; Chinnadurai Immanuel Selvaraj
      Abstract: A multimillion-dollar boom is achieved every year by the ethnopharmaceutical companies, creating awareness around the globe to use herbal medicines to stay and live a healthy life. Nearly, two-thirds of the plants were discovered for herbal remedies, and some plants are even endangered to get extinct from the globe for their repeated utility. Sarcostemma brevistigma is one among the undiscovered medicinal plants which belongs to the family Asclepiadaceae found distributed in Indian states of Bihar, Bengal, Konkan, Tamil Nadu, and Kerala. This study was intended to determine the antidiabetic property of plant extract of Sarcostemma brevistigma evidenced by biochemical parameters, antioxidant activity, with the histopathological analysis in diabetic induced mice. Animals that were orally treated with the S. brevistigma extract showed blood glucose lowering effect when compared to the alloxan-induced mice, i.e., from 391.5 ± 6.3 to 193.6 ± 4.3 mg/dL. There is the significant increase in insulin level (P < 0.05) (27.97 ± 1.6 mIU/L) which is comparable to the metformin administered test group (30.35 ± 0.6 mIU/L). A significant difference (P < 0.05) of both ALT and AST levels were observed when compared to the other groups. A significant increase in antioxidant activity (reduced glutathione, malondialdehyde, superoxide dismutase) in plant extract administered group was observed when compared to the other treatment groups. Histopathological studies showed abnormalities in the liver, pancreas, kidney, lungs, heart, and spleen of alloxan-induced diabetic rats. The abnormalities were found to be normalized to a considerable extent after treatment with S. brevistigma extract. The results stood as evidence for S. brevistigma as an active antidiabetic herbal plant.
      PubDate: 2018-06-06
      DOI: 10.1007/s12010-018-2798-z
       
  • Biochemical and Molecular Study of Trichoderma harzianum Enriched
           Secretome Protein Profiles Using Lectin Affinity Chromatography
    • Authors: Stephanie Nauom; Benedito Rodrigues da Silva Neto; Marcela Suriani Ribeiro; Wellington Ramos Pedersoli; Cirano José Ulhoa; Roberto N. Silva; Valdirene Neves Monteiro
      Abstract: Protein glycosylation is one of the most studied post-translational modifications and has received considerable attention for its critical role in the cell biology of eukaryotic cells. The genus Trichoderma has been extensively studied in the biocontrol of soil-borne fungal phytopathogens. The aim of this study was to identify the proteins secreted from Trichoderma harzianum after interacting with the cell walls of two phytopathogens, Sclerotinia sclerotiorum and Fusarium oxysporum. This study used N-glycoprotein enrichment with a concanavalin A (Con A) affinity column, staining detection differential SDS-PAGE, sequencing by mass spectrometric, and protein identification by comparison with the NCBI database to detect the protein expression of the two resulting secretome samples. The majority of the proteins found in both enriched secretomes belonged to a specific class of carbohydrate-active enzymes (CAZymes), within which glycosyl hydrolases (GHs), glycosyltransferases (GTs), and auxiliary activities (AAs) were identified. In this study was described two proteins that have not been previously reported in the secretomes of Trichoderma, a glycosyltransferase (six-harpin) and a galactose oxidase, belonging to the class of auxiliary activities (AA), classified as an AA subfamily AA5-2.The expression pattern of gene encoding to 17 identified proteins, evaluated by real-time quantitative PCR (RT-qPCR), showed significant difference of expression of some GHs and proteases, suggesting a specific gene expression regulation by T. harzianum in presence of different cell walls of two phytopathogens.
      PubDate: 2018-06-05
      DOI: 10.1007/s12010-018-2795-2
       
  • Cantilever Functionalization Using Peroxidase Extract of Low Cost for
           Glyphosate Detection
    • Authors: Daniela Kunkel Muenchen; Janine Martinazzo; Alexandra Nava Brezolin; Alana Marie de Cezaro; Aline Andressa Rigo; Mateus Nava Mezarroba; Alexandra Manzoli; Fábio de Lima Leite; Juliana Steffens; Clarice Steffens
      Abstract: A cantilever nanobiosensor functionalized with vegetable source of peroxidase was developed as an innovative way for glyphosate herbicide detection over a wide concentration range (0.01 to 10 mg L−1) using atomic force microscopy (AFM) technique. The extract obtained from zucchini (Cucurbita pepo source of peroxidase), with high enzymatic activity and stability has been used as bio-recognition element to develop a nanobiosensor. The polarization-modulated reflection absorption infrared spectroscopy (PM-RAIRS) demonstrated the deposition of enzyme on cantilever surface using self-assembled monolayers (SAM) by the presence of the amide I and II bands. The detection mechanism of glyphosate was based on the changes in surface tension caused by the analyte adsorption, resulting in a conformational change in the enzyme structure. In this way, the results of nanobiosensor demonstrate the potential of the sensing device for detecting glyphosate with a detection limit of 0.028 mg L−1.
      PubDate: 2018-06-04
      DOI: 10.1007/s12010-018-2799-y
       
  • Expression of miRNAs Targeting mTOR and S6K1 Genes of mTOR Signaling
           Pathway Including miR-96, miR-557, and miR-3182 in Triple-Negative Breast
           Cancer
    • Authors: Javad Razaviyan; Razie Hadavi; Rezvan Tavakoli; Fereshteh Kamani; Maliheh Paknejad; Samira Mohammadi-Yeganeh
      Abstract: Triple-negative breast cancer (TNBC) is a highly aggressive form of breast cancer. Aberrant expression of genes in mTOR pathway and their targeting miRNAs plays an important role in TNBC. The aim of this study was to determine the expression of mTOR and S6K1 and their targeting miRNAs in breast cancer cell lines and clinical samples. miRNAs targeting 3′-UTR of mTOR and S6K1 mRNAs were predicted using bioinformatic algorithms. MDA-MB-231, MCF-7, and MCF-10A as well as 20 TNBC samples were analyzed for gene and miRNA expression using quantitative real-time PCR (RT-qPCR). A receiver operating characteristic (ROC) curve analysis was performed for evaluation of candidate miRNAs as diagnostic biomarkers. miR-96 and miR-557 targeting mTOR and S6K1 mRNAs, respectively, were selected, and miR-3182 was selected as the miRNA targeting both genes. The miRNAs were down-regulated in cell lines, while their target mRNAs were up-regulated. Similar findings were observed in clinical samples. The ROC curve analysis revealed decline in expression of these miRNAs. We suggest that miR-96, miR-557, and miR-3182 can be used as inhibitory agents for mTOR and S6K1 in TNBC-targeted therapy.
      PubDate: 2018-06-04
      DOI: 10.1007/s12010-018-2773-8
       
  • Evaluation and Optimization of Organic Acid Pretreatment of Cotton Gin
           Waste for Enzymatic Hydrolysis and Bioethanol Production
    • Authors: Shitarashmi Sahu; Krishna Pramanik
      Abstract: This paper investigates the efficiency of the organic acids on the pretreatment of an industrially generated cotton gin waste for the removal of lignin, thereby releasing cellulose and hemicellulose as fermentable sugar components. Cotton gin waste was pretreated with various organic acids namely lactic acid, oxalic acid, citric acid, and maleic acid. Among these, maleic acid was found to be the most efficient producing maximum xylose sugar (126.05 ± 0.74 g/g) at the optimum pretreatment condition of 150 °C, 500 mM, and 45 min. The pretreatment efficiency was comparable to the conventional dilute sulfuric acid pretreatment. A lignin removal of 88% was achieved by treating maleic acid pretreated biomass in a mixture of sodium sulfite and sodium chlorite. The pretreated biomass was further evaluated for the release of sugar by enzymatic hydrolysis and subsequently bioethanol production from hydrolysates. The maximum 686.13 g/g saccharification yield was achieved with maleic acid pretreated biomass which was slightly higher than the sulfuric acid (675.26 g/g) pretreated waste. The fermentation of mixed hydrolysates(41.75 g/l) produced 18.74 g/l bioethanol concentration with 2.25 g/l/h ethanol productivity and 0.48 g/g ethanol yield using sequential use of Saccharomyces cerevisiae and Pichia stipitis yeast strains. The production of bioethanol was higher than the ethanol produced using co-culture in comparison to sequential culture. Thus, it has been demonstrated that the maleic acid pretreatment and fermentation using sequential use of yeast strains are efficient for bioethanol production from cotton gin waste.
      PubDate: 2018-06-02
      DOI: 10.1007/s12010-018-2790-7
       
 
 
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