Papers by Keyword: Biomedicine

Abstract: This paper will present the advantages of developing the 3D printing process of nanomaterials in different fields such as electronics, biomedical and bioelectronics. As it is already known, nanomaterials are starting to become more and more useful, and more emphasis is being put on the development of new technologies to enable the use of these materials. Nanomaterials consist mainly of chemical substances made up from very small particles that are no larger than a hundred nanometers. These materials occur in nature, they can be an accidental product of human activity, or they can be consciously made to develop new characteristics such as strength, chemical reactivity or increased conductivity compared to the same material that does not display nanometric characteristics. By integrating nanomaterials to 3D printing technology, it is possible to create unique structures, which are difficult to achieve. Nanomaterials can possibly work on personal satisfaction and add to the advancement of European industry. However, new materials can also pose health and environmental risks. Scientific research has turned its attention to the potential outcomes of the production and application of nanomaterials. Meanwhile, the newest method for 3D printing of nanomaterials is Multiphase Direct Ink Writing (MDIW), a method developed from Direct Ink Writing (DIW), a revolutionary additive manufacturing mechanism with wide applications in structural engineering systems, thermal isolation, electrical conductivity, optical reflectivity, and biomedical scaffolds.

Abstract: Virtual reality (VR) and augmented reality (AR) have experienced a significant boom in recent years regarding their features and utility. They have become reliable tools that are applied in different fields and disciplines (medicine, industry, science, teaching, training, and robotics, among others). In the present research work, these technologies are used as tools for the training and maintenance of medical equipment. An application was developed using flexible programming and design software, such as Vuforia, Unity, SolidWorks, Visual Studio, and hardware such as smartphones and the HTC VIVE glasses. Considering the existing need and based on surveys carried out to medical and hospital technical staff, significant results were obtained about the use of AR and VR in the area of medicine. The use of interactive applications enables autonomous training, which may be executed at any time and it is also user-friendly; in addition, it enables achieving reduced maintenance time and improves the process of acquiring abilities, thus releasing resources for other purposes.

Abstract: Biomedical technologies (BMT) is a complex process aimed at developing new biological objects and products from them that can have a preventive, diagnostic, or therapeutic effect when used in medical practice. The article describes the development of biomedical technologies, the problems of the development of biomedical technologies, and also describes possible ways to solve them.

Abstract: One of the largest fields of application of electrospun materials is the biomedical field, including development of scaffolds for tissue engineering, drug delivery and wound healing. Electrospinning appears as a promising technique in terms of scaffolds composition and architecture, which is the main aspect of this review paper, with a special attention to natural polymers including collagen, fibrinogen, silk fibroin, chitosan, chitin etc. Thanks to the adaptability of the electrospinning process, versatile hybrid, custom tailored structure scaffolds have been reported. The same is achieved due to the vast biomaterials’ processability as well as modifications of the basic electrospinning set-up and its combination with other techniques, simultaneously or by post-processing.

Abstract: Beta titanium alloys are promising biomedical material for their excellent biocompatibility and low elastic modulus. Moderate strength of those materials in beta-annealed condition can be increased by precipitation hardening of alpha phase, but this causes significant increase in elastic modulus. In this study, small additions of Fe and Si are used to increase strength of commercial Ti - 35Nb - 7Zr - 5Ta (TNZT) alloy. Alloys with iron content up to 2% and silicon content up to 1% were manufactured. Elastic properties were investigated by pulse-echo method and flow curves were determined from tensile tests. Modulus of elasticity is increases from initial 60 GPa to 80 GPa due to Fe and Si content. Strength and modulus of elasticity were then related to chemical composition. Yield stress is increased from 450 MPa to 700 MPa thanks to small Fe and Si additions. Fe causes solid solution strengthening exhibited by sharp yield point. (Ti,Zr)₅Si₃ intermetallic particles further increase strength via precipitation hardening. An alloy containing 0.5% Si and 2% Fe showed improved properties for biomedical use.

Abstract: In the process of Biomedicine PV Grid, in order not to affect the quality of the grid, must ensure that the output current of photovoltaic power generation system and grid voltage maintain a high degree of consistency in the frequency, phase and amplitude. In order to make the output current of PV Grid inverter to meet the relevant standard of the grid, the appropriate grid filter and control strategy is the key. In order to improve the quality of the grid current and reduce the pollution of the grid harmonic current on the grid, select the three-phase full-bridge inverter circuit with LCL filters. In the grid control strategy, select the double loop current control based on grid current and capacitance current, and introduce the PR control into the double loop control system, analyze that PR control can achieve zero steady state error tracking of grid sinusoidal reference current and anti-grid voltage disturbances. Make double loop current control and SVPWM control combined, and prove the stability of this method through the simulation experiment.

Abstract: For meeting the requirements of formulating a reasonable surgical planning by using PC before the orthopedic surgery, and for solving the problem that MIMICS cannot solve and post process biological tissue models, we present a new virtual orthopedic surgery system which can accurately predict the healing effects after analyzing the mechanical characteristics of biological tissue by combining finite element method with FEA software. According to the different operation plans formulate by orthopedic doctors, the different surgical results will be revealed from the virtual orthopedic surgery system by which the problem of choosing the best surgical procedure is solved and the functions of MIMICS is optimized. This paper introduces the overall structure, application platform, operating principle and major function modules of the virtual orthopedic surgery system, and then proves the practical applicability and reliability by an experiment.

Abstract: Manglietia glauca leavies has a strong bactericidal Manglietia health capacity. However Manglietia glauca leavies are still underutilized and hence wasted. In order to better utilize Manglietia glauca leavies resources, the biomedicine resource of benzene/alcohol extractives from Manglietia glauca leavies were analyzed by GC/MS. Relative content of each component was determined by area normalization. The main ingredients of benzene/alcohol extractives of Manglietia glauca leavies were tritriacontane(4.84%), 9-octadecyne(4.19%), ethyl alcohol(3.23%), 2-furanmethanamine, tetrahydro-(3.1%), .beta.-sitosterol acetate(2.84%), vitamin e (2.77%), triacontanoic acid, methyl ester(2.67%), .gamma.-sitosterol(2.33%), nonacosane(2.15%), 5-acetoxy-6-methyl-12,13-dioxa-tricyclo[7.3.1.0(1,6)]tridecane-10-carboxylic acid(2.14%), d:b-friedo-b':a'-neogammacer-5-en-3-ol, (3.beta.)- (1.88%), pyridine-3-carboxamide, oxime, n-(2-trifluoromethylphenyl)- (1.84%), 1-heptadecyne(1.84%), friedelan-3-one(1.75%), 5-eicosene(1.72%), dibutyl phthalate(1.7%), 2,3,5,6-tetrafluoroanisole(1.6%), phenol, 4,4'-thiobis-(1.5%), etc. The results obtained fully indicated that the benzene/alcohol extractives of Manglietia glauca leavies had the great potential of noble natural biomedicines.

Abstract: The benzene/ethanol extractives of Eucalyptus camaldulensis biomass were identified by Py-GC/MS to find out biomedical application. The main 350°С pyrolysis components were 1-phenanthrenecarboxylic acid, 1,2,3,4,4a,9,10,10a-octahydro-1,4a-dimethyl-7-(1-methylethyl)- (21.22%), .beta.-sitosterol acetate (6.4%), stigmasterol, 22,23-dihydro-(5.87%), ergosta-4,6,22-trien-3.beta.-ol(3.6%), etc. The main 350°С pyrolysis components were 1-phenanthrenecarboxylic acid, 1,2,3,4,4a,9,10,10a-octahydro-1,4a-dimethyl-7-(1-methylethyl)- ( 23.58%), ergosta-4,6,22-trien- 3.alpha.-ol(6.27%), decanoic acid, 1,2,3-propanetriyl ester(6.1%), 4.alpha.-methylcholest-7-en- 3-one(3.92%), stigmasterol, 22,23-dihydro-(3.57%), stigmastan-3,5- diene(2.61%), etc. And the main 750°С pyrolysis components were 1-phenanthrenecarboxylic acid, 1,2,3,4,4a,9,10,10a-octahydro-1,4a-dimethyl-7-(1-methylethyl)- (28.83%), .beta.-sitosterol acetate (5.58%), cholest-8(14)-ene-3,15-dione(4.33%), 1,3-butadiene,2-methyl-(3.42%), etc. So the benzene/ethanol extractives of Eucalyptus camaldulensis could be used as biomedicine.

Abstract: Eucalyptus camaldulensis biomass has been widely used in fiber and pulp. However, this would result in serious water pollution and meanwhile bring a great waste of biological resources. Therefore, the ether/acetone extractives of Eucalyptus camaldulensis biomass were identified by Py-GC/MS. The main 350°С pyrolysis components were 7-Oxabicyclo[3.3.1]non- 2-ene,8-(4-methoxyphenyl)- 2,4,9-trimethyl- (7.1%), Indolo[2,3-b]quinoxaline, 1-fluoro(4.23%), etc. The main 550°С pyrolysis components were 7-Oxabicyclo[3.3.1]non-2-ene,8-(4-methoxyphenyl)- 2,4,9-trimethyl-(7.1%), Indolo[2,3-b]quinoxaline, 1-fluoro(4.23%), etc. And the main 750°С pyrolysis components were oleic acid(6.77%), 10,18-bisnorabieta-5,7,9(10),11,13 -pentaene(2.33%), 9,12-hexadecadienoic acid, methyl ester(2.12%), etc. So the ether/acetone extractives of Eucalyptus camaldulensis could be used as biomedicine.