检索结果-内蒙古大学图书馆

The potential use of Indonesian glutinous rice flour as nanoparticles organic filler for dental impression materials

引用

IOP Conference Series: Materials Science and engineering 2020年第1期1007卷

作者： V Takarini L A T W Asri R Suratman B K Hadi Materials Engineering Study Program Faculty of Mechanical and Aerospace Engineering Institut Teknologi Bandung Ganesha 10 Bandung 40132 Indonesia Dental Materials and Technology Department Faculty of Dentistry Universitas Padjadjaran Sekeloa Selatan 1 Bandung 40132 Indonesia Aerospace Engineering Study Program Faculty of Mechanical and Aerospace Engineering Institut Teknologi Bandung Ganesha 10 Bandung 40132 Indonesia

Indonesia as a third largest rice producer has glutinous rice as one of its natural resources, which can be used as the advantage in organic fillers production. Organic and inorganic fillers are commonly added to reinforce the mechanical properties of the polymer in impression materials. Organic fillers made from glutinous rice flour can be produced due to its high amylopectin content and unique characteristics of morphological and structural of the source plant. Moreover, it is abundant in production, low cost, non-toxic and biodegradable. However, this type of filler is not common in dental area, especially in impression materials. This study aims to exercise the probability of the use of organic fillers made from Indonesian glutinous rice as filler component of the viscosity the dental impression materials. Nano-size, morphology, and amount of glutinous rice organic filler shall affect the consistency of viscosity, which will be provided as light, medium, heavy body and putty consistency. The study can be used as a reference in the future research of Indonesian glutinous rice development for organic nanofillers production that could be used for dental impression materials reinforcement towards better mechanical properties.

关键词：

来源：评论

学校读者我要写书评

暂无评论

The molecular characterization of complete mitochondrial genome of spotted snakehead fish,Channa punctata(Bloch 1793)

引用

Mitochondrial DNA Part B 2019年第1期4卷 547-548页

作者： Md. Jobaidul Alam Sapto Andriyono Sinar Pagi Sektiana Md. Mofizur Rahman Hyun-Woo Kim Interdisciplinary Program of Biomedical Mechanical and Electrical Engineering Pukyong National University Busan Republic of KoreaDepartment of Fisheries Ministry of Fisheries and Livestock Dhaka Bangladesh Interdisciplinary Program of Biomedical Mechanical and Electrical Engineering Pukyong National University Busan Republic of KoreaFisheries and Marine Faculty Universitas Airlangga Surabaya East Java Indonesia Interdisciplinary Program of Biomedical Mechanical and Electrical Engineering Pukyong National University Busan Republic of KoreaAquaculture Technology Study Program Sekolah Tinggi Perikanan Jakarta Indonesia Department of Marine Biology Pukyong National University Busan Republic of KoreaDepartment of Fisheries and Marine Science Noakhali Science and Technology University Sonapur Noakhali Bangladesh Interdisciplinary Program of Biomedical Mechanical and Electrical Engineering Pukyong National University Busan Republic of KoreaDepartment of Marine Biology Pukyong National University Busan Republic of Korea

The complete mitochondrial genome of spotted snakehead fish,Channa punctata(Bloch 1793) was determined by MiSeq platform. The genome was 16,409 bp in length, in which canonical 13 protein-coding genes, 22 tRNAs, 2 rRNAs, and a control region (D-Loop) were encoded. Relatively higher overall A + T contents (53.70%) was identified compared with G + C contents (46.30%). Among 13 protein-coding genes, only one unusual start condon (GTG) was identified in COX1, whereas six genes includingCOXII,COXIII,NAD2,NAD3,NAD4, andCytbwere ended with the incomplete stop codons (TA-/T–). Based on the currently identified mitogenomes of Channa fish species,C. punctatawas most closely related toChanna gachuawith 82% sequence identity.

关键词： Next generation sequencing Channa punctata mitochondrial genome phylogeny snakehead fish

来源：评论

学校读者我要写书评

暂无评论

The Effect of Curing and Leaves Cutting in Longterm Storage of Shallot

引用

IOP Conference Series: Earth and Environmental Science 2020年第1期542卷

作者： M Kusmali U Ahmad E Darmawati Postharvest Technology Study Program Graduate School IPB University Bogor Indonesia Mechanical and Biosystem Engineering Department IPB University Bogor Indonesia

Shallot is important as one of the spices for cooking various foods, as raw materials for the food industry, and as one of the ingredients for Indonesian traditional herbs. Postharvest handling is needed to extend its shelf life and to maintain its quality during storage. The aims of this research are: 1) to evaluate the effect of curing and leaves cutting on the quality changes of shallots during storage, and 2) to get the best pre-storage procedure in maintaining the quality of shallots during storage. Shallots leaves were cut before drying while the others are stored with leaves as control. Then, half of the samples were cured for three days, and sundried for four days, while other samples were sundried directly for seven days without curing them first. Then samples were stored for 16 weeks in two different conditions. The results showed that the treatment of curing without leaves cutting and stored at 5°C with 65-70% RH gave the best quality than other treatments. It could minimize damage and weight loss, maintaining hardness, color, and important ingredients until 12 weeks of storage. However, there were drastic decreases in some quality parameters, 32.0% damage and 38.7% weight loss after 16 weeks of storage.

关键词：

来源：评论

学校读者我要写书评

暂无评论

Analysis of Welding Strength S45C Material in Spot Welding Process with Variations in Welding Press Time and Electrode Diameter

引用

IOP Conference Series: Materials Science and engineering 2020年第1期1007卷

作者： Sobron M.Lubis Rosehan Styven Erlely Study Program Mechanical Engineering Engineering Faculty Universitas Tarumanagara Jl. Let.Jen S. Parman No.1 Jakarta 11440 Indonesia

Spot welding is one system of connecting to steel materials or other materials that make up sheets. The welding time and electrode diameter are the factors that determine the formation of welding nuggets. This study was conducted to analyze the effect of welding time and electrode diameter on the joint strength of the S45C steel plate with a thickness of 1 mm. The welding process takes place with variations in welding time lasting 1 second, 1.5 seconds, 2 seconds, 2.5 seconds, 3 seconds, and variations in the electrode diameter of 6 mm, 8 mm, 10 mm. The results of welding are then carried out a tensile test to determine the strength of the formed nugget. From the data obtained, an analysis is performed. The highest output voltage analysis result of a 6 mm electrode diameter is 0.92 V with a welding time of 1.5 seconds, 8 mm electrode diameter is 0.9 Volt with 2 seconds welding time and a 10 mm electrode diameter is 0.98 Volt with welding time 1 second. The results of the highest electric power analysis of the 6 mm electrode diameter were 9655.12 Watt with 3 seconds welding time, 8 mm electrode diameter was 9227.66 Watt with 3 seconds welding time, and 10 mm electrode diameter was 9260.64 Watt with 3 seconds welding time. The highest tensile stress analysis results were 20.97 N/mm2 at 6 mm electrode diameter, 21.7825 N/mm2 at 8 mm electrode diameter and 29.555 N mm2 at 10 mm electrode diameter

关键词：

来源：评论

学校读者我要写书评

暂无评论

Hot forgeability of SCr420 low-alloy steel for piston rod application

引用

Journal of Physics: Conference Series 2020年第1期1595卷

作者： L Anggraini H Kartomi Study Program of Mechanical Engineering President University Jl. Ki Hajar Dewantara Jababeka Education Park Cikarang Bekasi 17550 Indonesia

Microstructure development and mechanical property of SCr420 low-alloy steel (equivalent to AISI 5120) obtained by the forging process have been investigated. The relationship between the forgeability and mean grain sizes were examined. The type of forging was carried out by die-forging at a temperature of around 1150 - 1190°C using a machine tonnage of 1600 tons capacity with 2 times forging variation. The high aspect ratio can be maintained through the steel forming applied for piston rod by the hot forging process. Vicker's hardness mechanical tests in initial and forged conditions were carried out at room temperature. The results demonstrate that the Vickers hardness of initial condition of 254.5 HV is much higher in comparison with the hot-forged material of 152.6 HV. The forged low-alloy steel processes the desired ferrite-pro eutectoid and pearlite microstructures, when followed by normalizing process, and deformation are achieved.

关键词：

来源：评论

学校读者我要写书评

暂无评论

Multiple Linear Regression Analysis On Effect Of Time Variations And Voltage Variations On Spot Welding Against Shear Strength Of Aa5083 Material Using Ibm Spss Application

引用

IOP Conference Series: Materials Science and engineering 2020年第1期1007卷

作者： Gugun Wiranto Sobron Y Lubis Rosehan Study Program Mechanical Engineering Engineering Faculty Universitas Tarumanagara Jl. Let.Jen S. Parman No.1 Jakarta 11440 Indonesia

Spot welding is one type of welding that is quite widely used in the vehicle industry, as well as ship manufacturing. This study used AA5083 aluminum plate which has a thickness of 1 mm, and overlapping joint. This study examine the effect of voltage and time variations on the value of the shear strength of the welded joint. The material is cut with a size of 200mm x 40mm, welded with voltage variations of 1.75V, 2.2Vand 2.28V. And time variations between 1s, 1.5s and 2s, 300Nconstant pressure and uses copper electrodes with a diameter of 8mm. Multiple linear regression analysis is carried out and the effect of variabel X1 (stress) + X2 (time) on Y (shear strength) is 50.4%, where X1 is 22.7% and X2 is 27.8%. It states that there is no influence between X1 and X2 on Y, because the more dominant data is the data at 1.75V and 2.2Vvoltages which have no significant difference. At 2.28V the material will receive more heat so as to allow the material to melt and have a greater HAZ area as well as the material thickness decreases so that it will affect the shear strength very significantly.

关键词：

来源：评论

学校读者我要写书评

暂无评论

Aluminum Alloy Piston Fabrication Technology by Super Forging-KIRIU

引用

IOP Conference Series: Materials Science and engineering 2020年第1期924卷

作者： Lydia Anggraini Adelya Anjany Study Program of Mechanical Engineering President University Jl. Ki Hajar Dewantara Jababeka Education Park Cikarang Bekasi 17550 Indonesia

This research aims to produce pistons a lighter and stronger piston, even in high compression and high engine speed conditions. The piston fabrication process is carried out by super forging using Aluminum as a raw material with a compound choice by Silicon or Magnesium. In addition, the outer layer of the piston is covered by molybdenum with the coating process as nanotechnology to prevent corrosion. Furthermore, the finishing is controlled by the programming system machine named CNC (Computerized Numerical Control). In addition to CNC, the automation system is carried out by the KIRIU machine which is also used in this study. The results of this study show that the use of Al-Si alloy base material has better piston quality and able to withstand high compression or high engine speed. Then, the Al-Si superforging piston compared to the two final automation processes of CNC and KIRIU. The evaluation results have proved that the KIRIU machine provides high accuracy and the actual production increases by 20% compared to CNC.

关键词：

来源：评论

学校读者我要写书评

暂无评论

Effect of modification of spiral pipes on mini boiler to steam temperature and boiler efficiency

引用

IOP Conference Series: Materials Science and engineering 2019年第1期620卷

作者： Y Fusito Ismail Thamrin Program of Study Mechanical Engineering University of Sriwijaya

The purpose of this study is to modify the water pipe in the mini boiler into a spiral pipe, with a pipe length of 196.8 cm. With the aim of increasing the efficiency and temperature produced by mini boilers. In addition, it is also to determine the shape and length of the pipe that is better for use in mini boilers. The results of the test show the temperature rise that passes through the superheater pipe. In the spiral pipe model there is a temperature increase of 10.92 °C, with a steam inlet temperature of 277.62 °C. While the temperature of steam coming out of the superheater pipe is 288.54°C. This shows a temperature increase of 16.6°C, with a superheater pipe steam temperature of 267.4 °C and a steam temperature of 284 °C from the previous pipe model. Testing for heating water, until it becomes steam in the mini boiler is carried out for 90 *** temperature value of the spiral pipe model is better than the previous pipe model. And the efficiency value obtained in the mini boiler using the spiral pipe is 15.055%, while in the previous study only 5.73%.

关键词：

来源：评论

学校读者我要写书评

暂无评论

Analysis of the effect of the cutting speed on specific cutting energy in turning process

引用

IOP Conference Series: Materials Science and engineering 2019年第1期620卷

作者： Ismail Thamrin Program of Study Mechanical Engineering University of Sriwijaya

In machining process, the cutting temperature and cutting force produced is an important parameter need to be control or reduce. The cutting temperature and cutting force will effected the tool life thus effected the tool cost. Metalworking fluids are essential coolants and lubricants used in material removal and deformation processes to improve manufacturing *** Research will look the effect of cutting speed to specific cutting energy in workpiece on Turning Process using SCCO2 as the coolant. The results of the analysis on this study will compare the results from simulations using Autodesk Software Simulation of mechanical 2016 with the results of the journal as a reference. From theoretical calculations, the cutting forces decrease while the cutting speeds increase. Then the specific cutting energy will decrease with the increase of cutting speed. The specific cutting energy is. 1,805 J/mm3 to cutting speed 50 m/min, 1,765 J/mm3 to cutting speed 65 m/min and 1,733 J/mm3 to cutting speed 80 m/min [8].

关键词：

来源：评论

学校读者我要写书评

暂无评论

Utilization plastic waste using pyrolysis fixed bed

引用

IOP Conference Series: Materials Science and engineering 2019年第1期539卷

作者： I B A Swamardika I N S Winaya R S Hartati Study Program of Electrical Engineering Faculty of Engineering University of Udayana Study Program of Mechanical Engineering Faculty of Engineering University of Udayana

This investigative research aims to convert urban non-organic waste fuels such as plastic waste into energy using fixed bed pyrolysis technology. Pyrolysis fixed bed (PFB) is one of the most efficient technologies for converting various types of undegradable solid waste into thermal energy and liquid fuels with high efficiency. The study was conducted on a lab-scale PFB reactor with dimensions of 15 cm and 55 cm in diameter and bed height respectively. The reactor is equipped with a cooling and decomposition system to accommodate liquid and gas products. Reactor temperature variations using an external heater were tested and quartz sands were selected as a bed material to improve the temperature function of the PFB reactor so as the maximum quality and quantity of liquid product were obtained. The fuel properties of the derived oil were tested including their physical properties, calorific value, elemental measurement (CHNOS) analysis. The results of the study showed that the increase in temperature resulted in an increased pyrolysis performance which was indicated by the increased volume and liquid caloric value.

关键词：

来源：评论

学校读者我要写书评

暂无评论

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案：

请选择收藏分类：

通借通还

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：