Influence of Collagen Status on Microstructures of Porous Collagen/TCP Composites

2007 ◽  
Vol 330-332 ◽  
pp. 495-498
Author(s):  
Chao Zou ◽  
Wen Jian Weng ◽  
Xu Liang Deng ◽  
Kui Cheng ◽  
Pi Yi Du ◽  
...  
Keyword(s):  
Tissue Engineering ◽  
Cell Growth ◽  
Tricalcium Phosphate ◽  
Freeze Drying ◽  
Alkali Treatment ◽  
Test Results ◽  
Collagen Matrices ◽  
The Difference ◽  
Porous Composites ◽  
Better Than

Two starting collagens, sponge and floc collagen, were used to prepare collagen/tricalcium phosphate (TCP) composites. The resulting composites were porous and had 200μm pore size. However, there was a difference in the microstructure of the pore walls for the composites derived from the two collagens, the pore walls in sponge collagen/TCP composite were still porous and had 200 nm micropores size, TCP particles were trapped in collagen matrices. While floc collagen/TCP composite had smooth and dense walls in which TCP particles were embedded. The difference could be attributed to the starting collagen with different status. Sponge collagen has a soft structure, which easily becomes disassembled fibrils during alkali treatment, the disassembled fibrils are integrated again to form a dense morphology for pore walls after freeze-drying. While floc collagen has already a low disassembly degree, the alkali treatment could not be able to separate the fibrils, this remains as micropores in pore walls after freeze-drying. Both porous composites are significant in bone tissue engineering or regeneration. MTT test results showed the two composites had good cytocompatibility, and sponge collagen/TCP composite was somewhat better than floc collagen/TCP composite, which could result from that micropores derived roughness in pore walls of sponge collagen/TCP composite is suitable for cell growth.

scholarly journals Thermal Comfort Evaluation of Rooms Installed with STPV Windows

Energies ◽  
2019 ◽  
Vol 12 (5) ◽  
pp. 808 ◽  
Author(s):  
Hao Tian ◽  
Wei Zhang ◽  
Lingzhi Xie ◽  
Zhichun Ni ◽  
Qingzhu Wei ◽  
...  
Keyword(s):  
Thermal Comfort ◽  
Indoor Environment ◽  
Thermal Sensation ◽  
Test Results ◽  
Test Unit ◽  
Maximum Difference ◽  
Test Rig ◽  
Comfort Evaluation ◽  
The Difference ◽  
Better Than

Thermal comfort is an important aspect to take into consideration for the indoor environment of a building integrated with a semi-transparent Photovoltaics (STPV) system. The thermal comfort of units with photovoltaic windows and that of conventional windows, which is an ordinary without PV, were evaluated via on-site tests and questionnaires. Using the thermal comfort investigation of the test rig, the maximum difference in air temperature was found to be around 5 °C between test unit and comparison unit. The predicted mean vote (PMV)–predicted percentage dissatisfied (PPD) value of the test unit was better than that of the comparison unit. It was observed that on sunny days, the PMV value ranged from 0.2 (nature) to 1.3 (slightly warm) in the test unit, and that of the comparison unit was 0.7 (slightly warm) to 2.0 (warm), thereby providing better thermal comfort, especially during mornings. The maximum difference in PPD values was found to reach 27% between the two units at noon. On cloudy days, the difference was negligible, and the thermal sensation between the foot and the head were almost the same. Fifty respondents were asked to complete a carefully designed questionnaire. The thermal sensation of the test unit was better than that of comparison unit, which corresponded with the test results. Thermal, lighting, acoustic, and other environment comfort scores were combined, and the acceptance of the test unit with the STPV windows was found to be 73.8%. The thermal sensation difference between men and women was around 5%. Thus, during summer, STPV windows can improve the thermal comfort and potentially reduce the air-conditioning load.

Preparation and Characterization of a Novel γ-PGA/β-Tricalcium Phosphate Composite for Tissue Engineering

2014 ◽  
Vol 900 ◽  
pp. 306-311 ◽  
Author(s):  
Xiu Lin Shu ◽  
Qing Shan Shi ◽  
Xiao Bao Xie ◽  
Xiao Mo Huang ◽  
Yi Ben Chen
Keyword(s):  
Tissue Engineering ◽  
Cell Growth ◽  
Porous Structure ◽  
Water Absorption ◽  
Tricalcium Phosphate ◽  
Absorption Rate ◽  
Swelling Ratio ◽  
Composite Scaffolds

In order to improvedβ-TCP biocompatibility and cell growth, was chosen to modify β-TCP matrices to produce a γ-PGA/β-TCP composite biomaterial. Then, the morphology, water uptake and retention abilities,in vitrodegradation property in the simulated medium, cytotoxicity of this novel γ-PGA/β-TCP composite is investigated. SEM shows that the γ-PGA/β-TCP composite has a porous structure. By increasing the percentage ofγ-PGA from 0% to 50%, the swelling ratio of the composite s was enhanced from 9.0%to 297%. These data suggested that the surface hydrophilicity, water absorption rate, and swelling ratio were improved by adding γ-PGA to the composite. In the cytocompatibility test, the density of MC3T3-E1 preosteoblasts cells on the PTCP1:1 leachates was almost 110% higher than that on the controls on day 3. Therefore, the γ-PGA/β-TCP composite scaffolds, due to their better hydrophilicity, cytocompatibility, and porous structure, are very promising biomaterials for tissure engineering applications.

The Study of Anti-UV and Anti-Solarization of Strength Synthetic Fiber

2012 ◽  
Vol 573-574 ◽  
pp. 1224-1229
Author(s):  
Hai Yan Ni ◽  
Ying Jin Gan ◽  
Jin Ti You
Keyword(s):  
Fiber Bundle ◽  
Performance Test ◽  
High Strength ◽  
Uv Protection ◽  
National Standards ◽  
Synthetic Fiber ◽  
Test Results ◽  
Before And After ◽  
The Difference ◽  
Better Than

In view of anti-UV of the high strength synthetic fiber hoisting belt, the researcher compared the effects on anti-ultraviolet of SCJ-966 and HTUV100,through before and after intensity test and the test of Anti-solarization performance,then comparing with tests of fiber bundle strength,the reacher analyzed the effect of anti-UV and the difference on intensity.The result shows that:two UV performance are very good, far more than the European and national standards,and the webbing performance test results show that the UV protection of SCJ-966 UV protection is better than HTUV100, but the intensity rate is the former smaller than the latter, the extent damage of hoisting belt is the latter worse than the former.

scholarly journals Experiment of Pullout Expansion Anchor in Installation Cast in Place and Post Installed with Concrete Breakout Failure

2021 ◽  
Vol 23 (1) ◽  
pp. 37-45
Author(s):  
Amirul Huda ◽  
Henry Apriyatno
Keyword(s):  
Pullout Test ◽  
Test Results ◽  
Pullout Capacity ◽  
Concrete Compressive Strength ◽  
Strength Tests ◽  
Effective Depth ◽  
The Difference ◽  
Better Than ◽  
Ready Mix Concrete

Abstract: The use of anchors in construction is gaining popularity to connect steel and concrete constructions, and to transmit tensile loads acting onto the concrete. This research aims to find out the difference in the strength of anchor based on two methods of installations that are cast in place compared to post installed with the influence of effective depth, diameter of anchor and quality of concrete, and failure of concrete breakout. Expansion anchor used in this study is "Sanko" M12x100 and ready-mix concrete PT Bonindo Ungaran, fc 25 MPa with 6 pieces of test specimens of 300x300x150 mm. Each specimen has 4 anchors with a distance between the anchors of 100 cm, the distance between the anchors to the edge of the concrete 100 mm, and the depth of installation (hef) of 60 mm. The result of the study is the predicted value of the anchor pullout capacity with the failure of concrete breakout due to the theoretical pullout, namely 42,223 N, anchor pullout test results with cast in place method of 40,574 N and post installed method by 37,494 N. Tensile strength tests (material) of anchor (fy) 338 MPa, for flat concrete compressive strength strength of (f’c) 25,698 MPa. The results of the cast in place pullout test are larger and better than post installed (40574 N>37494 N). Failure that occurred in cast in place method is a failure of concrete breakout and post installed method has occurred slip. Failures that occur are relevant to the theory.

scholarly journals ANALISA PERBANDINGAN PENGGUNAAN PEMINDAH TENAGA BERJENIS TIMING BELT DAN RANTAI DENGAN VARIASI PUTARAN MESIN TERHADAP TORSI DAN DAYA KENDARAAN PADA MOTOR VIXION TAHUN 2009

2017 ◽  
Vol 5 (2) ◽  
Author(s):  
I Wayan Dalem Mahayana ◽  
Nyoman Arya Wigraha ◽  
Gede Widayana
Keyword(s):  
T Test ◽  
Test Results ◽  
Power Transfer ◽  
Test Analysis ◽  
Test Parameters ◽  
Timing Belt ◽  
The Difference ◽  
Graph Form ◽  
Better Than ◽  
Engine Power

Sistem pemindah tenaga merupakan suatu system yang berfungsi untuk meneruskan tenaga mesin sampai ke roda. Tujuan dari penelitian ini adalah untuk mengetahui perbandingan torsi pada motor vixion tahun 2009 150cc dengan penggunaan pemindah tenaga berjenis timing belt dengan rantai dan untuk mengetahui perbandingan daya pada motor vixion tahun 2009 150cc dengan penggunaan pemindah tenaga berjenis timing belt dengan rantai. Metode yang digunakan dalam penelitian ini adalah eksperimen dengan menggunakan parameter uji Dynotest Sport Device 3.8. Dari hasil pengujian dari rpm 4500 sampai rpm 9500 dengan kelipatan 500 rpm torsi yang dihasilkan dapat dirata – ratakan menjadi 8.685455 N.m pada penggunaan rantai dan 9.09 N.m pada penggunaan timing belt. Dan dari hasil pengujian dari rpm 4500 sampai rpm 9500 dengan kelipatan 500 rpm daya yang dihasilkan dapat dirata – ratakan menjadi 8.586364 HP pada penggunaan rantai dan 8.973636 HP pada penggunaan timing belt. Data yang didapat diolah menggunakan SPSS 17.0 dengan analisa paired sampel t-test dengan membandingkan data daya yang disalurkan rantai dengan daya yang disalurkan timing belt dan membandingkan torsi yang disalurkan rantai dengan torsi yang disalurkan timing belt dimana hasil penelitian ini disajikan dalam bentuk tabel dan grafik. Dan dapat disimpulkan bahwa penggunaan timing belt dapat meneruskan daya dan torsi lebih baik dari rantai dan perbedaannya dinyatakan signifikanKata Kunci : pemindah tenaga, daya, torsi, rantai, timing belt Power transfer system is a system that serves to continue the engine power to the wheels. The purpose of this research is to know the ratio of torsi to motorcycle vixion in 2009 150cc with the use of power transfer manifold timing belt with chain and to know the power ratio in motorcycle vixion year 2009 150cc with the use of power transfer manifold timing belt with chain. The method used in this research is an experiment using Dynotest Sport Device 3.8 test parameters. From the test results from 4500 rpm to 9500 rpm with a multiple of 500 rpm torsi can be averaged to 8.685455 N.m on the use of chains and 9.09 N.m on the use of timing belt. And from the test results from 4500 rpm to 9500 rpm with a multiple of 500 rpm the power generated can be averaged to 8.586364 HP on the use of chains and 8.973636 HP on the use of timing belt. The data obtained was processed using SPSS 17.0 with paired sample t-test analysis by comparing power data channeled by power channeled timing belt and compare torsi channeled by torsi which channeled timing belt where the result of this research is presented in table and graph form. And it can be concluded that the use of timing belt can continue power and torsi better than chain and the difference is significantkeyword : Transfer of power, power, torque, chain, timing belt

PENGARUH PENDEKATAN PEMBELAJARAN DAN KEMAMPUAN AWAL TERHADAP HASIL BELAJAR PADA MATA PELAJARAN SAINS DI SEKOLAH DASAR NEGERI 1 PAGUYAMAN KECAMATAN PAGUYAMAN PANTAI KABUPATEN BOALEMO

Akademika ◽  
2018 ◽  
Vol 7 (02) ◽  
pp. 1-24
Author(s):  
Hamzah B Uno ◽  
Nina Lamatenggo
Keyword(s):  
Learning Outcomes ◽  
Group Learning ◽  
Individual Learning ◽  
Learning Approach ◽  
Test Results ◽  
Approach To Learning ◽  
Individual Approach ◽  
The Difference ◽  
Initial Capacity ◽  
Better Than

The purpose of this study was to (1) knowing the difference of students studying inscience subjects are studied by using individual learning approach that uses the grouplearning approach. (2) know the interactions between learning approach and the initialcapacity of students learning outcomes in subjects science. (3) know the difference results oflearners studying in science subjects that have high initial capacity and learning throughindividual learning approach and the group learning approach (4) know the difference resultsof learners studying in science subjects with low initial ability and learning through individuallearning approach and the group learning approach. This study uses the method on twoclasses eksprimen who had treated the class got a treat with eksprimen materials scienceteach individual approach and the control class received treatment through group learningapproach. The data in this study using the test results of 28 studies on learners. The dataanalyzed in this study is descriptive and inferential. The research concluded that (1) On thewhole the results of studying science subjects that students learn with individual learningapproach does not provide significant differences in learning results in science subjectsstudents are studying with a group learning approach. This means that the overall approachto learning kemangkusan individual is better than the group learning approach. (2) There isinteraction between learning and the ability modeol beginning to learn to appreciate thescience lesson. This means that individual learning approach is superior to the group learningapproach for students who have a high initial capacity, while for students who have low initialability is more suited to group learning approach. (3) Learners who have a high initialcapacity, individual learning approach to learning results in science subjects better whencompared with the results of studying science subjects in the group learning approach. (4)For pupils who have a high initial capacity, individual learning approach to learning results inscience subjects better when compared with the results of studying science subjects in thegroup learning approach.

scholarly journals International normalized ratio (INR) testing in Europe: between-laboratory comparability of test results obtained by Quick and Owren reagents

2018 ◽  
Vol 56 (10) ◽  
pp. 1698-1703 ◽  
Author(s):  
Piet Meijer ◽  
Karin Kynde ◽  
Antonius M.H.P. van den Besselaar ◽  
Marjan Van Blerk ◽  
Timothy A.L. Woods
Keyword(s):  
Plasma Sample ◽  
International Normalized Ratio ◽  
Test Results ◽  
Local Calibration ◽  
The Mean ◽  
The Difference ◽  
Clinically Significant ◽  
Single Plasma ◽  
Better Than

Abstract Background: This study was designed to obtain an overview of the analytical quality of the prothrombin time, reported as international normalized ratio (INR) and to assess the variation of INR results between European laboratories, the difference between Quick-type and Owren-type methods and the effect of using local INR calibration or not. In addition, we assessed the variation in INR results obtained for a single donation in comparison with a pool of several plasmas. Methods: A set of four different lyophilized plasma samples were distributed via national EQA organizations to participating laboratories for INR measurement. Results: Between-laboratory variation was lower in the Owren group than in the Quick group (on average: 6.7% vs. 8.1%, respectively). Differences in the mean INR value between the Owren and Quick group were relatively small (<0.20 INR). Between-laboratory variation was lower after local INR calibration (CV: 6.7% vs. 8.6%). For laboratories performing local calibration, the between-laboratory variation was quite similar for the Owren and Quick group (on average: 6.5% and 6.7%, respectively). Clinically significant differences in INR results (difference in INR>0.5) were observed between different reagents. No systematic significant differences in the between-laboratory variation for a single-plasma sample and a pooled plasma sample were observed. Conclusions: The comparability for laboratories using local calibration of their thromboplastin reagent is better than for laboratories not performing local calibration. Implementing local calibration is strongly recommended for the measurement of INR.

scholarly journals Informative performance motor and functional training 6-7 grade girls

2013 ◽  
pp. 32-39 ◽  
Author(s):  
В. Ю. Веремеєнко
Keyword(s):  
Physical Education ◽  
Test Results ◽  
Significant Deterioration ◽  
Functional Training ◽  
Training Class ◽  
Analysis And Synthesis ◽  
Long Jump ◽  
The Difference ◽  
Improved Performance ◽  
Better Than

Due to the significant deterioration of motor readiness piddlitkiv children and one of the main issues is the optimization of physical education physical education that requires informative indicators of control.The aim - to identify informative performance motor and functional training girls 6-7 grades.To solve the tasks we used the following methods: theoretical analysis and synthesis of scientific and methodological literature; teacher testing; methods of mathematical statistics.Results. Analysis of test results showed that the tests «to evaluate the perception of power parameters movements hands» (Test 6) and «long jump from place» (test 11) 7th grade girls show statistically significantly better than girls 6th class (p <0,05 ). And for the other results trend towards improved performance, but the difference in test results are not statistically significant.Conclusions. Informative indicator of motor readiness girls grades 6-7 are «Assessing the perception of power parameters movements hands» and «Jump into dovzhynu the place.»Ghencea test is the most informative and can be recommended to assess functional training class 6 girls. Serkina test may be recommended to evaluate the functional status of girls 7th grade. 

Decision Support Systems Using Ensemble Genetic Programming

2006 ◽  
Vol 05 (04) ◽  
pp. 303-313 ◽  
Author(s):  
Ajith Abraham ◽  
Crina Grosan
Keyword(s):  
Decision Support ◽  
Genetic Programming ◽  
Gene Expression Programming ◽  
Test Results ◽  
Programming Techniques ◽  
The Difference ◽  
The Individual ◽  
Programming Algorithms ◽  
Combat Environment ◽  
Better Than

This paper proposes a decision support system for tactical air combat environment using a combination of unsupervised learning for clustering the data and an ensemble of three well-known genetic programming techniques to classify the different decision regions accurately. The genetic programming techniques used are: Linear Genetic programming (LGP), Multi-Expression Programming (MEP) and Gene Expression Programming (GEP). The clustered data are used as the inputs to the genetic programming algorithms. Some simulation results demonstrating the difference of these techniques are also performed. Test results reveal that the proposed ensemble method performed better than the individual GP approaches and that the method is efficient.

scholarly journals THE INTERVENTION CONTRACT RELAX HAMSTRING AND HOLD RELAX QUADRICEPS BETTER THAN CONTRACT RELAX HAMSTRING AND ISOTONIC EXERCISE QUADRICEPS IN IMPROVING FLEXIBILITY OF HAMSTRING ON WOMEN OF PKK AT BANJAR JAMBE BELODAN, DESA DAUH PEKEN, TABANAN

2018 ◽  
Vol 6 (1) ◽  
pp. 47
Author(s):  
Putu Santi Krishna Megasari ◽  
Ni Luh Nopi Andayani ◽  
Susy Purnawati ◽  
Ida Ayu Dewi Wiryanthini
Keyword(s):  
Physical Activity ◽  
Test Results ◽  
Paired Samples ◽  
Isotonic Exercise ◽  
Hamstring Muscles ◽  
Muscle Shortening ◽  
Post Test ◽  
The Difference ◽  
Group 2 ◽  
Better Than

ABSTRACT Lack of physical activity to excessive physical activity, pregnancy and lack of exercise in women affects the hamstring muscle shortening if left unchecked will cause a loss of flexibility in the muscles. This study is an experimentalresearch design with Two Group Pre and Post Test Design involving 22 samples were divided into 2 groups: treatmentgroup 1 with intervention Contract relax hamstring and hold relax quadriceps and treatment group 2 with interventionContract relax hamstring and Isotonic exercise quadriceps , Paired samples t-test showed the value of p = 0.000 in bothgroups. 22.82 (SB 7.85) cm in group 1 and 16.54 (SB 6.43) cm in group 2. The test results independent sample t-testshowed the value of p = 0.000 on the difference increased flexibility of the hamstring muscles. The conclusion of thisstudy is the contract hold-relax relax the hamstring and quadriceps better than contract relax the hamstring andquadriceps Isotonic exercise in improving the flexibility of the hamstring on Women of PKK in Banjar Jambe Belodan,Desa Dauh Peken, Tabanan. Keywords: hamstring tightness, flexibility of hamstring muscles, stretching, contract relax, hold relax, Isotonicexercise

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