Chapter 4 results discussions design and development of tissue engineering scafflods using rapid prototyping technology

... 64. 3 51500 1.6 55.3 39. 64 PCL-PEG Raw 63.5 33000 1.6 62 44 .44 PCL-PEG Scaffold 65.3 33600 1.7 61.8 44 .30 PCL-PEG-PCL Raw 64. 4 30000 1.8 48 34. 41 PCL-PEG-PCL Scaffold 65.6 31700 1.7 47 .2 33. 84 ... (bar) Figure 4. 11: Influence of extrusion pressure on RW and porosity of the scaffolds fabricated with lay-down pattern of 0/90 and nozzle size of 500 µm 113 Chapter Four: Results and Discussions ... increase of the fiber diameter from 268±32 µm to 43 2 40 µm, 1 14 Chapter Four: Results and Discussions which corresponded to a decrease of the scaffold’s porosity from 75%±6% to 29%±13% In case of selecting...

Chapter 2 literature review design and development of tissue engineering scafflods using rapid prototyping technology

... 173-178 6- 12 41.4-55 .2 3-10 1.4 -2. 8 55-60 12- 16 1 .27 1.34 1 .25 27 .6-41.4 3-10 1.4 -2. 8 60-65 >24 1 .24 55 .2- 82. 7 5-10 2. 8-4 .2 PGA 185 -22 5 25 -65 6- 12 1.53 >68.9 15 -20 >6.9 PCL 58-68 - 70 >24 1.11 20 .7-34.5 ... rates of all such polymers, the structural stability of PCL permits the study of fabrication and characterization as a tissue engineering scaffold 16 Chapter Two: Literature Review 2. 2 .2 Copolymers ... 20 03), swelling (Bezemer et al, 1999; van Dijkhuizen-Radersma et al, 20 02; Deschamps et al, 20 02) [26 ,28 ,29 ], biodegradation rate (Deschamps et al, 20 02) , protein adsorption (Mahmood et al, 20 04)...

Chapter 5 conclusions recommendations design and development of tissue engineering scafflods using rapid prototyping technology

... Chapter Five: Conclusions and Recommendations 5. 1 Conclusions A desktop robot based rapid prototyping (DRBRP) melt extrusion system was designed and developed in house ... filament diameter and consequently, the pore size and porosity A range of filament diameter (3 75 to 623 µm) and porosity ( 45 to 75% ) was obtained by varying the process parameters In spite of significant ... of the polymer components The scaffold processing demonstrated in one hand, the efficacy of the DRBRP technique to process a wide range of biopolymers and on the other hand, the feasibility of...

Design and development of tissue engineering scafflods using rapid prototyping technology chapter 3

... accuracy of up to 2°C and the feed rate had the deposition speed accuracy of up to 3mm/min Material Loading Port Teflon Insulator Figure 3. 2: Four-axes desktop robot-based rapid prototyping system 3. 4.2 ... (0/90°, 0/60/120° and 0 /30 /60/90/120/150°) as shown in Figure 3. 4 using appropriate positioning of the robotic control system The lay-down patterns of 0/90°, 0/60/120° and 0 /30 /60/90/120/150° ... (PCL and PCL-PEG) and a series of FDs (1.0, 1.25 & 1.5 mm) applying the liquefier temperature, extrusion pressure and 69 Chapter Three: Materials and Methods deposition speed of 90°C, 4.0 bars and...

Design and development of tissue engineering scafflods using rapid prototyping technology

... those of the tissues at the site of implantation e) Be easily fabricated to form a variety of shapes and sizes In the early days of tissue engineering, FDA approved devices and implants made of ... number of materials as well as scaffold design have been experimentally and/ or clinically studied For the treatment of tissues/organs in malfunction, one of the challenges in the field of tissue engineering ... between cells and their living environments, such as extracellular matrix, is critical for design and development of efficient tissue engineering devices In this regard, the biochemical and topographic...

Chapter 4: Getting Images into and out of Photoshop

... Dodge and Burn tools The digital fountain of youth At the end of Chapter 5, I show an example of using the Dodge tool to fade wrinkles without removing them completely Photoshop, being a complex and ... again, and repeat a number of times to create a series of paw prints marching into the distance Figure 8- 14: The many faces of transformations The mask-related selection commands At the bottom of ... can also eliminate jagged edges along the outside of your selection ߜ Expand: The Expand command moves the selection border outward a specified number of pixels Be careful, though, because if...

Design and development of major balance of plant components in solid oxide fuel cell system

... determining the SOFC system performance The detailed designs of each of these components in the INER SOFC system are described in the following subsections 3.1 Flow distributor In general, an SOFC ... 44%) Design of SOFC BOP components The BOP components of a SOFC system account for between 50% and 70% of the total system cost Due to the high operating temperature of SOFC, the material of all ... pressure and mass flow rate in the major BOP components so as to identify potential design improvements in the INER SOFC system in the future In practice, optimizing the SOFC system performance using...

Design and development of a medical parallel robotfor cardiopulmonary resuscitation

... from medical aspects, a 3-PUU translational parallel manipulator was chosen and designed to satisfy the speciﬁc requirement The kinematic analysis was performed and the manipulatorreachable workspace ... represents an ∂R equation in a single variable R and allows the calculation of the values of R and H in sequence B Design Variables and Objective Function The architectural parameters of a 3-PUU ... the LI AND XU: DESIGN AND DEVELOPMENT OF A MEDICAL PARALLEL ROBOT FOR CARDIOPULMONARY RESUSCITATION 269 actuators locked, the moving platform of the TPM can still undergo inﬁnitesimal translations...

Formulation design and development of transdermal delivery system nanoemulsion of schizandrol a

... for transdermal delivery of schizandrol A More specifically, the aims are: Establishing a detailed preformulation and solubility profile of schizandrol A Physicochemical properties of schizandrol ... shengmaisan in rat after oral administration and pharmacokinetic results demonstrated that schizandrol A was rapidly absorbed in blood, rapidly eliminated after h and near-clearance within 24 h and was ... represent a major class of cosmeceuticals They are generally regarded as a plentiful natural source of antioxidant and anti-inflammatory agents A diverse range of botanicals have been applied in...

Hyperscsi design and development of a new protocol for storage networking

... connection and data reliability mechanism A UDP datagram has a header and a payload The application data is carried as payload and the header carries the necessary information for protocol operation A ... volume of and the increasingly critical role played by data storage, there is a strong demand to put data storage on network Therefore, how to share data, improve data reliability, and back up and ... parameter to determine the total data transfer rate and packet loss ratio RBUDP separates the signaling control and data communication channel to achieve higher data transfer rate The analytical...

Design and development of a self balancing bicycle using control moment gyro

... moment gyro (CMG) as an actuator The control moment gyro (CMG) is typically used in a spacecraft to orient the vessel [5] Appling a CMG as an actuator to balance a bicycle is a creative and novel approach; ... provides a comparison of the various methods to balance a bicycle, evaluated their advantages and disadvantages The most significant contribution of this research is the use of a CMG as an actuator ... torque applied to the handlebar to balance the bicycle Advantages of such a system include low mass and low energy consumption Disadvantages of such as system is its lack of robustness against large...

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Design and development of a bench top electro adsorption chiller

... chiller and the combined thermoelectric adsorption chiller 14 Chapter Design, development and fabrication of an electro- adsorption chiller Chapter Design, development and fabrication of an electro- adsorption ... 2.4 Electro- adsorption chiller (EAC) 11 2.4.1 Adsrobent- adesorbate pair 13 2.4.2 Performance of an electro- adsorption chiller 13 Chapter Design, development and fabrication of an electro- adsorption ... the details of each of the major components are described (Qext ) Figure 3.1 A schematic layout of an electro- adsorption chiller 15 Chapter Design, development and fabrication of an electro- adsorption...

Design and development of a bioreactor for ligament tissue engineering

... (lateral collateral ligament and medial collateral ligament) , and two interior ligaments (anterior cruciate ligament (ACL) and posterior cruciate ligament) , which help control stabilisation and ... Rotating Wall Bioreactor 28 2.2.2.3 The Flow Perfusion Bioreactor 29 CHAPTER 3: DESIGN AND FABRICATION OF BIAXIAL MECHANICAL STIMULATION AND PERFUSION BIOREACTOR 32 3.1 DESIGN CRITERIA 32 3.2 MATERIAL ... field of tissue engineering has shown to be a promising alternative in using cell transplantation as a strategy to achieve tissue repair and regeneration for a variety of therapeutic needs One approach...

Design and development of a CMOS power amplifier for digital applications

... that make it acts as an open circuit and also the tank circuit appears to be a Design and Development of a CMOS Power Amplifier for Digital Applications 34 CHAPTER 3: Fundamentals of Power Amplifier ... Scattering Design and Development of a CMOS Power Amplifier for Digital Applications 40 CHAPTER 4: Power Amplifier: Design Implementation & Simulation parameters and also the admittance parameters of ... a CMOS Power Amplifier for Digital Applications 18 CHAPTER 3: Fundamentals of Power Amplifier bandwidth Hence, to measure the linearity of a power amplifier that is used to transmit a digital...

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