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  Subjects -> BIOLOGY (Total: 3126 journals)
    - BIOCHEMISTRY (240 journals)
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    - BIOLOGY (1490 journals)
    - BIOPHYSICS (47 journals)
    - BIOTECHNOLOGY (236 journals)
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    - ORNITHOLOGY (26 journals)
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    - ZOOLOGY (137 journals)

BIOTECHNOLOGY (236 journals)                  1 2 | Last

Showing 1 - 200 of 239 Journals sorted alphabetically
3 Biotech     Open Access   (Followers: 8)
Advanced Biomedical Research     Open Access  
Advances in Bioscience and Biotechnology     Open Access   (Followers: 16)
Advances in Genetic Engineering & Biotechnology     Hybrid Journal   (Followers: 7)
Advances in Regenerative Medicine     Open Access   (Followers: 2)
African Journal of Biotechnology     Open Access   (Followers: 6)
Algal Research     Partially Free   (Followers: 11)
American Journal of Biochemistry and Biotechnology     Open Access   (Followers: 67)
American Journal of Bioinformatics Research     Open Access   (Followers: 7)
American Journal of Polymer Science     Open Access   (Followers: 32)
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 Biosafety     Hybrid Journal  
Applied Food Biotechnology     Open Access   (Followers: 3)
Applied Microbiology and Biotechnology     Hybrid Journal   (Followers: 64)
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: 3)
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)
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)
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: 28)
Biotechnologia Acta     Open Access   (Followers: 1)
Biotechnologie, Agronomie, Société et Environnement     Open Access   (Followers: 2)
Biotechnology     Open Access   (Followers: 6)
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: 2)
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: 40)
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  
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: 2)
Computer Methods and Programs in Biomedicine     Hybrid Journal   (Followers: 8)
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)
Indonesian Journal of Medicine     Open Access  
Industrial Biotechnology     Hybrid Journal   (Followers: 17)
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: 3)
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)
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 Biosecurity Biosafety and Biodefense Law     Hybrid Journal   (Followers: 3)
Journal of Biotechnology     Hybrid Journal   (Followers: 64)
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   (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 Essential Oil Research     Hybrid Journal   (Followers: 2)
Journal of Experimental Biology     Full-text available via subscription   (Followers: 25)
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: 17)
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: 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: 12)
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: 4)
Metalloproteinases In Medicine     Open Access  
Microbial Biotechnology     Open Access   (Followers: 9)
MicroMedicine     Open Access   (Followers: 3)
Molecular and Cellular Biomedical Sciences     Open Access   (Followers: 1)
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  
Nanomedicine and Nanobiology     Full-text available via subscription  
Nanomedicine Research Journal     Open Access  

        1 2 | Last

Journal Cover
Nanomedicine Research Journal
Number of Followers: 0  

  This is an Open Access Journal Open Access journal
ISSN (Print) 2476-3489 - ISSN (Online) 2476-7123
Published by Tehran University of Medical Sciences Homepage  [25 journals]
  • Implants modified with polymeric nanofibers coating containing the
           antibiotic vancomycin

    • Abstract: Objective(S): Implant-related infections are disastrous complications in the clinic. One recent strategy to reduce the rate of infection is using the bioactive coating with an antibiotic. The purpose of these bioactive surfaces is to prevent bacterial adhesion to the implant and, consequently, the development of biofilm. In this study, vancomycin-loaded polymeric coating on implants was prepared using the electrospinning technique.                        Methods: We selected polymers, chitosan (CS), and poly ethylene oxide (PEO) to prepare nanofibers. Then for the better attachment of nanofibers on the implant, the first coated the implant with thin film CS-gelatin. The prepared coatings were characterized using Scanning electron microscopy (SEM) and FT-IR spectroscopy. The antibacterial effectiveness of vancomycin-loaded polymeric coating and the bacterial adhesion of Staphylococcus aureus were evaluated in vitro. An elution study was performed with UV-Vis spectroscopy to determine the release behaviour of the vancomycin from the polymeric coating. Results: The morphology of the vancomycin-loaded polymeric coating implant exhibited nanofibers with diameters 70-130 nm. The vancomycin-loaded polymeric coating titanium significantly reduced the adhesion of the staphylococcus aureus compared with bare implants in vitro. The release of vancomycin showed an initial vancomycin burst effect followed by a slow release. 36%of the drug in first two hours, 70% in first 24 hours and 96% in the first week released. Conclusions: The vancomycin-loaded polymeric coating, present many advantages and may be considered to prevent and treat implant-associated infections by impeding bacterial adherence to the implant surface or reducing the concentration of bacteria near the implant.
      PubDate: Thu, 30 Nov 2017 20:30:00 +010
       
  • The Potentials and Applications of Cellulose Acetate in biosensor
           technology

    • Abstract: The interest in cellulose and its derivatives has been exponentially increasing due to its excellent thermal stability, biocompatibility, chemical persistence and biodegradability. Among various cellulose derivatives, cellulose acetate (CA) has been applied in many applications including sensor systems, drug delivery systems, separation membrane, and tissue engineering. Recently, the electrospun nanofibers have been employed and have gotten more attention in the biotechnology and the biomedical applications. In this case, Electrospinning methods widely used to fabricate and generate novel nanomaterials along with the well-aligned structure of electrospun nanofibers. Electrospinning has emerged as a powerful method to produce nanofibrous assemblies from a variety of polymers and composites including CA fibers. These fibers obtained from this method were applied in biomedical applications specially for sensing process in the medical diagnostic kit. In this review article, the recent progress and development of electrospun CA fibers and nanofibers and also their nanocomposites for advanced sensing systems are presented. Several sensors and biosensors including optical/colorimetric, and electrochemical-based on CA are discussed in this study. 
      PubDate: Thu, 30 Nov 2017 20:30:00 +010
       
  • Synthesis and cytotoxicity evaluation of electrospun PVA magnetic
           nanofibers containing ...

    • Abstract: Objective(s): The purpose of this study was preparation and evaluation of PVA-Fe3O4 nanofibers as nanocarrier of doxorubicin (DOX) by measuring their drug release together with their in vitro cytotoxicity toward cancer cells at different pH values. Methods: Fe3O4 nanoparticles were synthesized by coprecipitation method. The composite nanofibers of polyvinyl alcohol containing nanoparticles and anticancer drug DOX were fabricated by electrospinning method. The nanostructures were characterized by different techniques. The drug release was investigated by UV-Vis spectrophotometer at different pHs and 37.5 ̊C. Results: In vitro drug release experiments show that the doxorubicin release at pH= 6.0 is promisingly more and faster than drug release at pH= 7.4. The fitted equation of release curves corresponds to Peppas model. Also, MTT assays indicate that the MNPs-doxorubicin-loaded nanocarrier has cytotoxicity comparable with free drug. Conclusions: The synthesized nanocarrier was successfully used for the efficient delivery of an anti-cancer drug into the tumor region. The DOX-loaded nanocarrier showed a steady and sustained release profile in vitro up to 72 h. The drug release from nanocarrier was better described using Peppas model. 
      PubDate: Thu, 30 Nov 2017 20:30:00 +010
       
  • Novel Semisolid Design Based on Bismuth Oxide (Bi2O3) nanoparticles for
           radiation protection

    • Abstract: Objective(S): The dangerous effects of X-ray have been elucidated by scientific studies in occupational health hygiene.  X-ray protective like an apron, thyroid shield and gloves have been made of lead (Pb) to protect against X-ray. However, such equipment makes a lot of safety and health problems such as toxicity, weight, inflexibility and troubles usage in a physician. To overcome such problems, X-ray absorbance’s such as semi-solids have been developed. Here in, an investigation was carried out to see whether the mixture of semi-solid material containing bismuth oxide nanoparticles. Methods: The mixture of semi-solid containing bismuth oxide nanoparticles was prepared based on the synthesis of bismuth oxide nanoparticles and formulation of semisolid. The bismuth oxide nanoparticles were prepared via synthesis method intermediating sorbitol with optimized conditions. In X-ray dosimeter test, the protective effect of bismuth oxide nanoparticles in semisolid was evaluated in comparison to lead adsorbents when all conditions were similar (P<0.05). Results: X-ray absorbance efficiency of bismuth nanoparticles dispersed in semisolids was more efficient than conventional lead absorbance. The percentage of X-ray absorption in the ointment of bismuth oxide nanoparticles is 56.79 while the absorption value in the 0.5-millimeter lead is between 40% and 42%. Conclusions: The X-ray absorbent based on semi-solid containing bismuth oxide nanoparticles has many advantages in comparison to conventional lead absorbent such as; high surface area, low amount of sorbent, easy usage, high efficiency of X-ray absorbance, and lower toxic effect on the environment.
      PubDate: Thu, 30 Nov 2017 20:30:00 +010
       
  • Evaluation of the Effective Electrospinning Parameters Controlling Kefiran
           Nanofibers Diameter ...

    • Abstract: Objective(s): This paper investigates the validity of Artificial Neural Networks (ANN) model in the prediction of electrospun kefiran nanofibers diameter using 4 effective parameters involved in electrospinning process. Polymer concentration, applied voltage, flow rate and nozzle to collector distance were used as variable parameters to design various sets of electrospinning experiments for production of electrospun kefiran nanofibers. Methods: The Scanning Electron Microscopy (SEM) was used to investigate the morphology and evaluate the size of the nanofiber. Data set was drawn using k fold cross-validation method, which was the most suitable scheme for the volume of the data in this work. Data were partitioned into the five series and trained and tested via ANN method. Results: The Scanning Electron Microscopy (SEM) images of the generated nanofiber samples were confirmed that all of the samples were fine and defect-free. Our results indicated that the network including four input variables, three hidden layers with 10, 18 and 9 nodes in each layer, respectively, and one output layer obtained the highest efficiency in the testing set. The mean squared error (MSE) and linear regression (R) between observed and predicted nanofibers diameter were 0.0452 and 0.950, respectively. Conclusions: The results demonstrated that the proposed neural network was appropriately performed in assessing the input parameters and prediction of nanofibers diameter.
      PubDate: Thu, 30 Nov 2017 20:30:00 +010
       
  • In vitro biocompatibility of low and medium molecular weight
           chitosan–coated Fe3O4 nanoparticles

    • Abstract: Objective(S): The chitosan - Fe3O4 core - shell nanoparticles were synthesized. The nanoparticles should be coated properly in the shape of core-shell, so that they remain hidden from the body's immune system after coating. Effects of different molecular weight in coating were investigated. Methods: Nanoparticles coated with low and medium molecular weight chitosan were synthesized in one step. In this way, first, the nanoparticles were prepared by co-precipitation method. Then, the surface of the nanoparticles was modified using oleic acid. Finally, the nanoparticles were coated with low or medium molecular weight chitosan. The properties of particles were investigated by TEM, XRD, VSM and FT-IR devices as well as the Debye Scherrer method. In biocompatibility study, the nanoparticles were transferred to a medium containing fibroblast cells which were extracted from the mouse embryo and cultivated in an incubator. Then, dead and live fibroblast cells were counted. Results: The growth of fibroblast cells that were adjacent to the nanoparticles were different. The percentage of live cells in the container containing uncoated particles in the sixth day was 20%. Also, the percentage of live cells in a container containing particles covered with low and medium molecular weight chitosan were 90 and 98% in the sixth day respectively. Conclusions: The molecular weight of chitosan can have a significant effect on the toxicity of nanoparticles in biological environments throughout time, so it shows that the medium cells containing particles coated with medium molecular weight chitosan had better growth than low molecular weight chitosan coated particles.
      PubDate: Thu, 30 Nov 2017 20:30:00 +010
       
  • Simulation of tissue heating by magnetic fluid hyperthermia

    • Abstract: Objective: Magnetic fluid hyperthermia is a technique in which thermal energy is generated by magnetic nanoparticles (MNPs) that are excited by an alternating magnetic field (AC field). During hyperthermia, in-vivo monitoring of elevation of temperature relies on invasive insertion of conventional thermometers, or employment of thermo-sensitive cameras that lack high precision. The objective of this manuscript is to provide a mathematical approach to better estimate elevation of temperature and its profile after hyperthermia of MNPs inside an AC field. Methods: To this end, we first show that temperature profile due to hyperthermia of iron oxide MNPs at 10, 25, and 50 mg/ml are concentration dependent. Then by using best-fit polynomial equations, we show that the temperature profile for any given concentration of the same iron oxide MNPs can be traced to close approximation. Thermodynamic heat transfer equations were then used to graph the distribution of temperature in a tissue with a known heat capacity and conductivity parameters. Results: The resulting MatLab software simulation provides the thermal profile of a hypothetical tumor placed adjacent to a muscle tissue. Conclusions: In conclusion, the proposed mathematical approach can closely estimate the temperature profile of magnetic fluid hyperthermia.
      PubDate: Thu, 30 Nov 2017 20:30:00 +010
       
  • Synthesis of Porous Nanostructure NiTi Implant and Measurement of
           Thermomechanical Properties

    • Abstract: Objective(s): NiTi is known as the most important material for manufacturing implants and medical devises duo to its shape memory and superelasticity properties, high energy damping, and high corrosion resistance. Methods: In this project, the possibility of producing nanostructured NiTi implant with high porosity was investigated. For reaching to the nanoscale, the mechanical alloying process was done on Ti and Ni powder as raw materials. Mechanical alloying process and the possibility of reaching nanostructure or amorphous phase was investigated. Space holder technique was used for reaching a porous structure. Sintering process was planned in a way to inhibit grain growth as much as possible. The samples sintered at two different sintering times. The effect of grain size and secondary phases on mechanical properties and phase transformation temperatures was studied. Results: The results showed that milling for 50 h at 300 rpm has led to amorphous phase and nanocrystallite with 50 nm diameter. Using space holder technique with the appropriate amount of spacer and choosing proper sintering time and temperature, the specimens with 70% porosity were produced. Furthermore, nanoscale grain size can lead to R phase transition. In fact, one of the effects of reaching to nanostructure is occurring R transformation due to high dislocation density and high grain boundaries surface. Nanostructured sample with 70% porosity was shown 5% superelasticity in the cyclic pressure test. Conclusions: As the results showed, one of the advantages of porous samples is their elastic modulus which is more similar to the bone than other metallic implants.
      PubDate: Thu, 30 Nov 2017 20:30:00 +010
       
 
 
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