Galling wear between ASTM 6061 aluminum and grade D2 tool steel

2021 ◽  
pp. 135065012110597
Author(s):  
Erick Martínez-Méndez ◽  
Daniel Antonio-Aguirre ◽  
Manuel Vite-Torres ◽  
José F Márquez-Santiago ◽  
Walter R Tuckart ◽  
...  
Keyword(s):  
Automotive Industry ◽  
Severe Form ◽  
Test Surface ◽  
Automotive Components ◽  
Post Test ◽  
Series Of Experiments ◽  
Materials Used ◽  
D2 Steel ◽  
Wear Tests

In the automotive industry, galling is a huge problem either for the tool life or the quality of the stamping metal component. Galling is a severe form of scuffing associated with gross damage to the surface or failure. This work aims to carry out a series of experiments of galling tests at different loads and similar roughness with 6061 aluminum and D2 steel, common materials used in automotive components and tools respectively. A tribometer was employed to generate Galling wear, the button-on-button configuration, according to the ASTM G-196-08 standard. The results show the threshold of minimum load without galling wear. Post-test-surface analysis of the specimens was conducted by confocal microscopy to identify the damage generated during the wear tests. Additionally, a couple of friction tests were carried only to illustrate the friction coefficient behavior under galling conditions.

scholarly journals Uji Toksisitas Daun Kelor ( Moringa Oleifera) Terhadap Sel Fibroblas Gingiva Menggunakan Uji MTT Assay

2015 ◽  
Vol 17 (1) ◽  
pp. 52
Author(s):  
Sheila Ayu Nararya
Keyword(s):  
Cell Culture ◽  
Mtt Assay ◽  
Moringa Oleifera ◽  
Human Life ◽  
Fibroblast Cell ◽  
Primary Cell ◽  
Post Test ◽  
Human Care ◽  
Materials Used

ABSTRACT Background: The oral cavity’s health is one of the most important  factors in  determining the quality of human life. Oral cancer is a type of  disease that can fataly change the quality of human life if not properly handle. Among all the cancer treatment, chemotherapy is oftenly done. However, chemotherapy has some side effects that can exacerbate the patient’s state. Alternative care has become another promising option besides chemotherapy. One of them is Moringa oleifera or as known as kelor leaves. The active compound content of Moringa oleifera extract especially isothiocianate has good potential in cancer therapy. But, any materials used in human care must passed the toxicity test. Purpose: This research was conducted to find out the toxicity of Moringa oleifera extract with isothiocianate to primary cell gingival fibroblast.Method: Experimental laboratory study with the post test only group control design. There are 4 types of concentration group from kelor leaves extract which is 3,125%, 1,625%, 0,812%, and 0,406% and there are also the media control and cell control. Each sample were put in 96 well that already contain fibroblast cell culture with 6 times replication for each group. And then, it was tested with MTT assay. Results: The concentration group from 3,125% until 0,406% has the percentage of living cells above 100%. Conclusion: The results of this research is that the kelor leaves (Moringa oleifera) extract with isothiocyanate is not toxic against primary cell culture fibroblast. Keywords: Moringa oleifera extract, isothiocyanate , toxicity.  Latar Belakang: Kesehatan rongga mulut merupakan salah satu faktor penting yang berperan dalam menentukan kualitas hidup manusia. Kanker rongga mulut merupakan salah satu penyakit yang dapat mengubah kualitas hidup manusia dan berkaibat fatal apabila tidak ditangani dengan tepat. Salah satu pengobatan kanker yang sering dilakukan adalah kemoterapi. Meskipun demikian, kemoterapi memiliki beberapa efek samping yang dapat berakibat buruk kepada pasien kanker. Perawatan alternatif pun  menjadi pilihan lain selain kemoterapi. Salah satunya adalah dengan daun kelor (Moringa oleifera) . Kandungan aktif  dari daun kelor memiliki manfaat yang baik sebagai terapi kanker. Namun, semua bahan yang akan digunakan pada manusia harus melawati uji toksisitas. Tujuan: Tujuan dilakukan penelitian ini yaitu untuk mengetahui hasil toksisitas ekstrak daun kelor (Moringa oleifera) dengan kandungan isotiosianat terhadap cell line fibroblas. Metode:  Penelitian eksperimental  laboratoris dengan post test only group design. Terdapat 4 macam kelompok konsentrasi dari ekstrak daun kelor yaitu 3,125%, 1,625%, 0,812%, dan 0,406%  disertai dengan kontrol media dan kontrol sel. Setiap perlakuan diletakkan pada plate 96 well yang telah berisi kultur sel fibroblas dengan 6 kali replika untuk setiap kelompok. Kemudian dilakukan uji MTT assay. Hasil: Kelompok konsentrasi 3,125% hingga 0,812% memiliki jumlah persentase sel hidup diatas 100%. Kesimpulan: Hasil penelitian ini menunjukkan bahwa ekstrak daun kelor (Moringa oleifera) dengan kandungan isotiosianat tidak bersifat toksik terhadap kultur sel primer fibroblas. Kata Kunci : Ekstrak daun kelor (Moringa oleifera), isotiosianat, uji toksisitas.

Impact of European Norms Euro 6 on Usage of Polymeric and Composite Products in Automotive Industry with the Purpose of Reducing Pollution

2021 ◽  
Vol 42 ◽  
pp. 137-142
Author(s):  
Isabele Maria Coman
Keyword(s):  
European Union ◽  
Engineering Design ◽  
Automotive Industry ◽  
Polymeric Composites ◽  
The European Union ◽  
Environment Impact ◽  
Car Industry ◽  
Main Target ◽  
Materials Used

This study presents the evolution of the European Norms of depollution and their environment impact. Therefore, starting Euro 1 Norms (1992), the European Commission defines and regulates the exhaust emissions of the vehicles produced and sold in the European Union. From 2014 until the end of 2020, car producers are under the regulations of the Euro 6/VI Directives. These regulations had a great impact on the process of vehicles engineering design as they influence the materials used during the manufacturing process such as metals, additives or plastic and polymeric composites. One key role in the development of less polluting vehicles is the usage of polymeric composites. Thanks to these materials, cars are now lighter, therefore they consume less fuel and they produce less pollution, and also they present an increased level of comfort and safety. One main target of the Euro 6 regulation is to popularize electrical, hybrid or hydrogen cars. Plastic and polymeric composites such as polyacetal, polyphenylene ether or other engineering resins are a key part of the evolution of car industry. This article is intended to summarize how using polymers on different car components impacts the quality of air.

PENINGKATAN KUALITAS HIDUP MELALUI LOGOTERAPI PADA KLIEN YANG MENJALANI HEMODIALISIS

2019 ◽  
Vol 11 (1) ◽  
pp. 9-18
Author(s):  
Abdul Wakhid ◽  
Ana Puji Astuti ◽  
Maya Kurnia Dewi
Keyword(s):  
Quality Of Life ◽  
Renal Failure ◽  
Test Group ◽  
Sampling Technique ◽  
T Test ◽  
P Value ◽  
Number Of Patients ◽  
Post Test ◽  
The Mean

Logoterapi merupakan terapi untuk menemukan makna positif dibalik sebuah kejadian yang tidak diharapkan. Logoterapi dilaksanakan secara individu maupun berkelompok dalam bentuk konseling dan berorientasi pada pencarian makna hidup individu. Tujuan logoterapi meningkatkan makna pengalaman hidup individu yang diarahkan kepada pengambilan keputusan yang bertanggung jawab. Penelitian ini dilakukan dengan menggunakan rancangan pre-experiment dengan metode pre and post test group, artinya pengumpulan data dilakukan terhadap responden untuk membandingkan kualitas hidup sebelum dan sesudah dilakukan intervensi. Teknik pengambilan sampel dilakukan dengan metode total sampling yaitu pengambilan seluruh sampel dengan tetap memperhatikan kriteria yang telah ditetapkan. Jumlah pasien yang menjalani hemodialisis di RSUD Ungaran sebanyak 21 orang dan di RSUD Ambarawa sebanyak 25 pasien. Analisis data dilakukan dengan menggunakan uji t test dependent. Hasil penelitian didapatkan bahwa dari 46 responden didapatkan rata-rata skor kualitas hidup pasien yang mejalani hemodialisis sebesar 60.22 dengan skor terrendah 55 dan skor tertinggi 69. Bahwa dari 46 responden didapatkan rata-rata skor kualitas hidup pasien yang mejalani hemodialisis sebesar 88.72 dengan skor terrendah 79 dan skor tertinggi 103. Hasil uji statistik dengan uji t test dependent diketahui ada pengaruh logoterapi terhadap kemampuan memaknai hidup pada klien yang menjalani hemodialisis di RSUD Kabupaten Semarang (p value: 0,0001). Saran perlunya peningkatan kemampuan perawat dalam memberikan layanan kesehatan termasuk pemberian atau pemanduan penemuan makna hidup bagi pasien hemodialysis, agar selain dengan hemodialysis, ada faktor internal dari pasien yang dapat dijadikan sebagai motivasi untuk sembuh dari penyakit.   Kata Kunci: Logoterapi, kualitas hidup   IMPROVE THE QUALITY OF LIFE OF PATIENTS WITH RENAL FAILURE WHO UNDERWENT HEMODIALYSIS   ABSTRACT Logotherapy is a therapy to discover the positive meaning behind an unexpected event. Logotherapy is carried out individually or in groups in the form of counseling and oriented to the search for the meaning of individual life. This study aims to improve the quality of life of patients with renal failure who underwent hemodialysis. This research was conducted by using pre-experiment with pre-post test study. The sampling technique was done by the convenience sampling. The number of patients undergoing hemodialysis as many as 46 respondents. Data analysis was done by using test t test dependent. The result showed that from 46 respondents got the mean of quality of life of patients who had hemodialysis 60.22 with lowest score 55 and highest score 69. Whereas from 46 respondents got the mean score of life quality of patients who had hemodialysis 88.72 with score the lowest score 79 and the highest score 103. The result of statistical test with t test dependent is known there is influence of logoterapi to the ability of meaningful life on client who undergo hemodialysis at Semarang Regency hospitals (p value: 0.0001). Advice on the need to improve the nurse's ability to provide health services, including the provision or guidance of the discovery of the meaning of life for hemodialysis patients, in addition to hemodialysis, there are internal factors of the patient that can be used as a motivation to recover from illness.   Keywords: Logotherapy, quality of life, kidney failure.  

The Anxiety of Pregnant Women in Post Abortion by Reading Ayatus Syifa and Lavender Aromatherapy

2020 ◽  
Vol 7 (3) ◽  
pp. 404-409
Author(s):  
Inna Sholicha Fitriani ◽  
Nurhidayati Nurhidayati
Keyword(s):  
Data Analysis ◽  
Pregnant Woman ◽  
Pregnant Women ◽  
Test Group ◽  
Total Sample ◽  
Anxiety Level ◽  
Wilcoxon Test ◽  
Post Test ◽  
Post Abortion

Pregnancy and abortion can be a stressor that can increase anxiety. The Qur'an is just as a doubt antidote and diseases that are in the chest and it is commonly known as the heart. The Lavender one of essential oil which popular and it is widely used in the field of clinical health which especially addressing psychosomatic in gynecology. The purpose of this research was to determine the potential decrease of anxiety on pregnant women in post-abortion by reading verses syifa and lavender aromatherapy. The research used experimental design of Pre and Post Test-Group with a sample of all pregnant women who had abortion. The total sample was 24 people. The research was conducted in Aisyiyah Hospital and Muhammadiyah Hospital of Ponorogo in Juny - August 2018. The data analysis used T and Wilcoxon test. The result of data analysis were 0,003 <0,05 and there was comparison between potential decrease of anxiety in pregnant women post abortion by reading verses syifa and giving aromatherapy  of lavender.  The comparison showed that the potency of decreasing of anxiety in pregnant woman post abortion by reading ayatus syifa and giving aromatherapy of lavender, 38% decreased anxiety level in pregnant woman post abortion because of lavender therapy and 62% was due to other factor. Then 89%decreased in anxiety level in pregnant woman post abortion because of reading ayatus syifa and 11% due to other factor. Research products can be used as media in the treatment of non pharmacological psikomatic in order to support quality of public health.

EFFECTIVENESS OF USING MCH BOOKS AND MONSCA APPLICATIONS IN THE IMPLEMENTATION OF 14 T ANTENATAL SERVICE STANDARDS

2020 ◽  
Vol 12 (1) ◽  
pp. 68-73
Author(s):  
Rahmawati Rahmawati ◽  
Syarif Syafruddin ◽  
Nontji Wena
Keyword(s):  
Antenatal Care ◽  
Pregnant Women ◽  
Continuity Of Care ◽  
Control Design ◽  
Sampling Technique ◽  
Limited Time ◽  
Control Groups ◽  
Post Test ◽  
Service Standards

The component of antenatal care received by pregnant women is classified as incomplete because the implementation of standard pregnancy services is still using conventional methods. There are obstacles faced by midwives, such as the limited time in a recording, which has an impact on the declining quality of antenatal care standards. This research aims to compare the effectiveness of the use of KIA books and MONSCA applications in midwives in the application of the standard Antenatal service 14 T. This research was conducted in Puskesmas Tanete and Puskesmas Bontobangun Bulukumba District. The method used in the study is experimental quasi (pre-test post-test nonequivalent control design). Using a sample of midwives in this study, as many as 36 people were divided into two groups (18 intervention groups and 18 control groups). The sampling technique in this study used purposive sampling. Data were analyzed using the Mann-Whitney Test. The results showed that there was a difference in the effectiveness of using KIA books with MONSCA applications, MOSCA's applications were easier to use, faster, safer, and more accurate than KIA books. It can be concluded that the MONSCA application is more effective than KIA books. Key words: Effectiveness, Android-based Smart Continuity of Care application, KIA book, Antenatal service 14 T

The fate of formaldehyde in sugar manufacture and in products

2015 ◽  
pp. 692-696
Author(s):  
Remi Aubry ◽  
Laurence Gasnot
Keyword(s):  
Sugar Industry ◽  
Common Knowledge ◽  
Microbial Populations ◽  
Optimal Dosage ◽  
Consumer Health ◽  
Microbiological Activity ◽  
Specific Process ◽  
Beet Sugar ◽  
Series Of Experiments

A study was carried out in six beet sugar factories in France during the 2012/13 sugar campaign. The objective was to assess the optimal dosage of formaldehyde solutions at specific process stages and in different existing factory set-ups in order to obtain the desired effect on microbial populations, without interference with the quality of the products. In addition harmlessness regarding consumer health was to be demonstrated. A series of experiments was conducted resulting in new data allowing refreshment of common knowledge and references existing regarding the use of formaldehyde solutions in the sugar industry. The effectiveness and convenience for controlling microbiological activity in beet sugar manufacture was assessed. Formaldehyde reduces sugar losses and protects in-process products without harming their further use, such as for ethanol production.

CUIDADOS BUCAIS EM PACIENTES VENTILADOS MECANICAMENTE: CONHECIMENTO DE ENFERMEIROS DE UM HOSPITAL ESCOLA

2018 ◽  
Vol 8 (4) ◽  
Author(s):  
Gérsica Sampaio Silva ◽  
Fernanda Alves Ferreira Gonçalves ◽  
Bárbara Ribeiro Miquelin Bueno ◽  
Georlucya Kátia Da Silva Ferreira ◽  
Ludmila Pinheiro Da Silva ◽  
...  
Keyword(s):  
Oral Hygiene ◽  
Oral Care ◽  
Cross Sectional Study ◽  
Cross Sectional ◽  
Mechanically Ventilated ◽  
Mechanically Ventilated Patients ◽  
Complicating Factors ◽  
Materials Used ◽  
Ventilated Patients

Objetivo: Avaliar o conhecimento acerca dos cuidados bucais realizados por enfermeiros a pacientes ventilados mecanicamente. Método: Estudo transversal, realizado em um hospital escola de Goiânia/Goiás. A coleta de dados deu-se por meio de questionário estruturado. Resultados: Os enfermeiros conhecem as medidas recomendadas sobre higiene bucal. Os fatores dificultadores encontrados foram a falta de pessoal (21,7%), falta de tempo (16,7%) e trabalhos burocráticos (15%). Contudo ainda existem lacunas no que se refere a produtos e materiais utilizados na higiene bucal. Conclusão: As Lacunas e os fatores dificultadores sinalizados nesse estudo merecem reflexão, como forma de avaliar a qualidade do cuidado oferecido.Descritores: Biofilme; Higiene Bucal; Cuidados de enfermagem.ORAL CARE IN MECHANICALLY VENTILATED PATIENTS: KNOWLEDGE OF NURSES FROM A SCHOOL HOSPITALObjective: To evaluate the knowledge about oral care performed by nurses in mechanically ventilated patients. Methods: a cross-sectional study, conducted in a teaching hospital of Goiania/Goias. The data collection was performed by means of a structured questionnaire. Results: The nurses know the measures recommended on oral hygiene. The complicating factors found were the lack of personnel (21.7%), lack of time (16.7%) and work on tape (15%). However there are still gaps in relation to products and materials used in oral hygiene. Conclusion: The gaps and the factors complicating factors indicated in this study deserve consideration, as a means of evaluating the quality of care offered.Keywords: Biofilm; Oral hygiene; Nursing care.CUIDADO ORAL EN PACIENTES CON VENTILACIÓN MECÁNICA: EL CONOCIMIENTO DE LAS ENFERMERAS DEL HOSPITAL ESCUELAObjetivo: Evaluar el conocimiento sobre el cuidado bucal realizadas por enfermeras en pacientes ventilados mecánicamente. Métodos: Estudio transversal, realizado en un hospital de Goiania y Goias. La recolección de datos se realizó por medio de un cuestionario estructurado. Resultados: Las enfermeras saben las medidas recomendadas en la higiene bucal. Los factores encontrados fueron la falta de personal (21,7%), la falta de tiempo (16,7%) y trabajar en la cinta (15%). Sin embargo todavía hay lagunas en relación con los productos y los materiales utilizados en la higiene bucal. Conclusión: Las brechas y los factores factores indicados en este estudio merecen consideración, como medio de evaluar la calidad de la atención ofrecida.Palabras clave: Biofilme; Higiene Bucal; Atención de Enfermería.

EVALUATION OF TRIBOTECHNICAL PROPERTIES OF THE COATING OBTAINED BY ELECTRIC SPARK HARDENING

2020 ◽  
Vol 4 (141) ◽  
pp. 157-163
Author(s):  
IL’YA ROMANOV ◽  
◽  
ROMAN ZADOROZHNIY
Keyword(s):  
Wear Resistance ◽  
Reference Sample ◽  
Optical Microscope ◽  
Research Purpose ◽  
Tribotechnical Properties ◽  
Uncoated Surface ◽  
Before And After ◽  
Materials Used ◽  
Friction Track

When applying coatings using various methods on the surfaces of moving parts that work in joints, it is important to make sure that the coatings are strong and wear-resistant in order to return them to their original resource. All existing hardening technologies and materials used to perform coatings have their own characteristics, therefore, the quality of the resulting coatings can be judged only after specific tests. (Research purpose) The research purpose is in evaluating the properties of the coating obtained by the method of electric spark hardening, and its ability to resist friction and mechanical wear. (Materials and methods) Authors conducted tests on the basis of the "Nano-Center" center for collective use. A coating was applied on the BIG-4M unit with a VK-8 hard alloy electrode, tribological properties were evaluated on a CSM Instruments TRB-S-DE-0000 tribometer, the width of the friction track was measured after the test using an inverted OLYMPUS gx51 optical microscope, and samples were weighed before and after the test on a VLR-200 analytical balance. Conducted research in accordance with GOST 23.224-86 and RD 50-662-88 guidelines. (Results and discussion) The article presents performed tests on the run-in and wear resistance of the coating. The samples were worked on with a step-by-step increase in the load. During the tests, the friction force was drawed on the diagram. Authors compared the results with the reference sample, an uncoated surface. (Conclusions) The resulting coating has better run-in and wear resistance compared to the standard, and the increase in wear resistance in dry friction conditions is very significant.

scholarly journals Analysis of Quality of Backyard Compost and Its Potential Utilization as a Circular Bio-Waste Source

2021 ◽  
Vol 11 (10) ◽  
pp. 4392
Author(s):  
Apolka Ujj ◽  
Kinga Percsi ◽  
Andras Beres ◽  
Laszlo Aleksza ◽  
Fernanda Ramos Diaz ◽  
...  
Keyword(s):  
Crop Production ◽  
Basic Education ◽  
Raw Materials ◽  
Nutrient Content ◽  
Quality Analysis ◽  
Weed Seed ◽  
Quality Properties ◽  
Seed Dispersion ◽  
Materials Used

The use and quality analysis of household compost have become very important issues in recent years due to the increasing interest in local food production and safe, self-produced food. The phenomenon was further exacerbated by the COVID-19 pandemic quarantine period, which gave new impetus to the growth of small home gardens. However, the knowledge associated with making high-quality compost is often lacking in home gardeners. Therefore, the objective of this research was to find answers to the following questions: can the quality of backyard compost be considered safe in terms of toxicity and nutrient content? Can weed seed dispersion affect the usability of backyard compost? In general, can the circulation of organic matter be increased with the spread of home composting? In this study, 16 different house composts were analysed for stability, weed seed contamination, toxic elements, and nutrient content using analysis of variance. The results of the research showed that the quality properties of the composts (including their weed seed dispersion effect) were greatly influenced by the different techniques and raw materials used. The toxicity levels, as well as the content of macro and microelements, were within the parameters of safe-quality compost. The specific macronutrient (Ca, Mg) and micronutrient (Fe, Mn) contents of the tested composts have a similar and, in some cases, more favorable nutrient supply capacity in crop production than the frequently-used cow manure-based composts. With a plan of basic education on composting, there is potential to encourage farmyard composting.

scholarly journals The burden of periodontal disease

Dental Update ◽  
2019 ◽  
Vol 46 (10) ◽  
pp. 907-913
Author(s):  
Kasim Butt ◽  
Razia Butt ◽  
Praveen Sharma
Keyword(s):  
Quality Of Life ◽  
Periodontal Disease ◽  
Tooth Loss ◽  
Chronic Inflammatory Disease ◽  
Severe Form ◽  
Health Concern ◽  
Ageing Population ◽  
Obesity And Diabetes ◽  
The Uk

Periodontal disease is the most common chronic inflammatory disease seen in humans. It is a major public health concern, and in its severe form affects approximately 10.8% or 743 million people aged 15−99 worldwide. Trends such as the rise of smoking in developing countries, the obesity and diabetes epidemic, coupled with an ageing population with greater tooth retention, are all likely to increase the burden of periodontitis still further in the UK and worldwide. Consequences of periodontitis include hypermobility of teeth, tooth migration, drifting and eventual tooth loss. Tooth loss can directly affect the quality of life of a person in terms of reduced functional capacity, self-esteem and social relationships. CPD/Clinical Relevance: This article reports the prevalence of periodontal disease in the UK and worldwide, along with the consequences of periodontitis. The importance of timely diagnosis to avoid litigation is discussed, as is the importance of effective management of periodontitis in order to improve patients' oral health-related quality of life.

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