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All Journal International Journal of Renewable Energy Development Jurnal Ilmiah Peuradeun BIOLINK (Jurnal Biologi Lingkungan, Industri, Kesehatan) Agrotekma: Jurnal Agroteknologi dan Ilmu Pertanian JURNAL SERAMBI ILMU Proceedings of International Conference on Multidiciplinary Research
Muhammad Usman, Muhammad
Universitas Medan Area
Religion Agriculture, Biological Sciences & Forestry Humanities Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Economics, Econometrics & Finance Education Energy Law, Crime, Criminology & Criminal Justice Social Sciences

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UJI ANTI MIKROBA EKSTRAK AKAR SOM JAWA (Tanilum paniculatum, Jacq. (Gaertn)) Sartini, Sartini; Usman, Muhammad
BIOLINK (Jurnal Biologi Lingkungan, Industri, Kesehatan) Vol 1, No 1 (2014): Agustus
Publisher : Program Studi Biologi, Fakultas Biologi Universitas Medan Area

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Abstract

Antimicrobial test was conducted on plant root extract som jawa (Talinum paniculatum, jacq. (Gaertn)). Five hundred gram simplicia of som jawa root was macerated using methanol and n-heksana, and coagulated. The screening of extract methanol and n-heksana was done to get metabolic secunder; flavonoid, alkaloid, terpenoid, and saponin. The result of phytochemistry secreening test to extract methanol to metabolic secunder was negative. Antimicrobial test result showed that the extract of som jawa root  is active againts microbes E.coli. Measurement is based on the test zone diameter of the clear zone generated, where . coli has the highest diameter of the clear zone compared with the others microbes such as Staphylococus aureus, Bacillus sp, Serratia sp, and Candida albicans. The values of the clear zone of each microbe  in order are 1,1 cm, 1 cm, 0,95cm, and 0,9 cm. These value were obtain at a concentration of 10%.
PEMANFAATAN KITOSAN DARI LIMBAH CANGKANG KERANG BULU(Anadara inflata) SEBAGAI BAHAN PENJERNIH AIR SUNGAING DARI LIMBAH KULIT DURIAN Lubis, Rosliana; Usman, Muhammad
BIOLINK (Jurnal Biologi Lingkungan, Industri, Kesehatan) Vol 1, No 1 (2014): Agustus
Publisher : Program Studi Biologi, Fakultas Biologi Universitas Medan Area

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Abstract

The title of  this study is the utilization of chitosan from shellfish waste as water purifier. The purpose of the study is to utilize coagulant of shellfish waste in water treatment proes into clear water. The research variabel are the concentration of chitosan 1,3,5,7, and 9 g/l. The particle size of chitosan used in this research is 150 mesh. The time consume  8 hours for purification process. The result showed that 9 g/l chitosan shell waste is effective to water purification process. At a concentration of 9 g/l. Chitosan shellfish waste can produce clean water in complianee with health minister No. 416/MENKES/PER/IX/1990 about  water quality treatment.
PENINGKATAN PERKEMBANGAN AUD Usman, Muhammad; Darmawati, Darmawati
JURNAL SERAMBI ILMU Vol 28, No 1 (2017)
Publisher : Fakultas Keguruan dan Ilmu Pendidikan Universitas Serambi Mekkah

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Abstract

Physical development in early childhood covers two main areas, namely gross motor and fine motor. Physical development of children goes according to developmental stages. However, as the developments of other dimensions, physical development of children is not running at the same time. Some children experience physical development faster than his friends, and the rest of them run slower. Growth and physical development has a very important role in a childs life. Growth and physical development is one of the tasks of the major developments in the life of a child. Growth and physical development will affect the development and growth of children in other developmental dimensions. Parents and teachers are very necessary to understand the growth and physical development of children, and instill healthy habits through physical activity of children from an early age. To help the physical development of children, the teachers and parents need to provide guidance to them in order to have an awareness of sensory abilities, and also has a positive attitude towards him. Parents and teachers also need to understand the signs of developmental delays in children, parents and teachers need to be cautious in view of delays in the development of children and must consult a doctor to ensure and provide the necessary help children, so that children can grow physically and develop optimally.
PENINGKATAN PERKEMBANGAN ANAK USIA DINI Usman, Muhammad
JURNAL SERAMBI ILMU Vol 18, No 1 (2017): Jurnal Serambi Ilmu
Publisher : UNIVERSITAS SERAMBI MEKKAH

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (954.992 KB) | DOI: 10.32672/si.v18i1.1027

Abstract

Physical development in early childhood covers two main areas, namely gross motor and fine motor. Physical development of children goes according to developmental stages. However, as the developments of other dimensions, physical development of children is not running at the same time. Some children experience physical development faster than his friends, and the rest of them run slower. Growth and physical development has a very important role in a child's life. Growth and physical development is one of the tasks of the major developments in the life of a child. Growth and physical development will affect the development and growth of children in other developmental dimensions. Parents and teachers are very necessary to understand the growth and physical development of children, and instill healthy habits through physical activity of children from an early age. To help the physical development of children, the teachers and parents need to provide guidance to them in order to have an awareness of sensory abilities, and also has a positive attitude towards him. Parents and teachers also need to understand the signs of developmental delays in children, parents and teachers need to be cautious in view of delays in the development of children and must consult a doctor to ensure and provide the necessary help children, so that children can grow physically and develop optimally.
TEACHING MODEL OF LEARNING ENGLISH WRITING AT UNIVERSITY Usman, Muhammad
Jurnal Ilmiah Peuradeun Vol 3 No 3 (2015): Jurnal Ilmiah Peuradeun
Publisher : SCAD Independent

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Abstract

The objective of this study is to produce a model of teaching English writing skill in an effective way for students of English Study Program in college. This research method is using the Research and Development. The teaching model arranged can be implemented conceptually and operationally. The model is developed based on the theories of learning writing. This research was conducted in Banda Aceh and the samples for determining the location specified in stratified sampling. This study was conducted at Serambi Mekkah University and Muhammadiyah University. Based on the research findings that the conditions of learning Model at Muhammadiyah University and Serambi Mekkah University were not in accordance with the theory and practice. They need both theory and practice to review paragraphs and the composition should be coherent. The design of learning model, Implementation, and Evaluation could be developed in teaching writing skill for both Universities students.
Pemanfaatan Beberapa Jenis Arang Aktif sebagai Bahan Absorben Logam Berat Cadmium (Cd) pada Tanah Sedimen Drainase Kota Medan sebagai Media Tanam Rahman, Abdul; Aziz, Rizal; Indrawati, Asmah; Usman, Muhammad
Agrotekma: Jurnal Agroteknologi dan Ilmu Pertanian Vol 5, No 1 (2020): Agrotekma: Jurnal Agroteknologi dan Ilmu Pertanian, Desember
Publisher : Universitas Medan Area

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31289/agr.v5i1.4240

Abstract

The purpose of this two-year research is to find methods and theories of soil cultivation for the Medan city drainage sediment which makes the city drainage shallow. Improving the environmental quality of Medan city by cultivating trench sediment soil into a horticultural planting medium. Obtaining a neat, comfortable and helpful city condition for the Government, especially the Public Works Office of Medam City. It will be avoided from flooding due to smooth city drainage and clean environment. The results of the study can be concluded that the activated charcoal treatment is used from a number of activated charcoal ingredients (Coconut Shell, Wood Sawdust Waste and Kendaga Karet) with measurement criteria namely char yield, water content, ash content, volatile content, carbon fish power, iodine absorption from as a whole it has a good value to be used as activated charcoal which has a value above the minimum limit, namely water content below the maximum value (<15%), ash content <10%, carbon binding capacity> 60%, evaporation power <25% and iodine absorption. > 750 mg. All of these parameters are in accordance with the national standard of SNI 06-3730-1995. The second conclusion is that the absorption of metals to heavy metalsPb, Cd and Cu, has a good ability even though it is small because the metal content from the start is below the quality standard, the concentrations tested are 0, 1, 3, 5, 7, and 9. While the best is obtained of the reduction rate in heavy metal Cd, and is 7 grams / kg of soil sample.Keywords: 
Biomass Feedstocks for Liquid Biofuels Production in Hawaii & Tropical Islands: A Review Usman, Muhammad; Cheng, Shuo; Cross, Jeffrey Scott
International Journal of Renewable Energy Development Vol 11, No 1 (2022): February 2022
Publisher : Center of Biomass & Renewable Energy, Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/ijred.2022.39285

Abstract

Many tropical islands, including Aruba, Seychelles, Mauritius, and Pacific Island countries, are entirely dependent on importing fossil fuels to meet their energy demands. Due to global warming, improving energy use efficiency and developing regionally available renewable energy resources are necessary to reduce carbon emissions. This review analyzed and identified biomass feedstocks to produce liquid biofuels targeting tropical islands, particularly focusing on Hawaii as a case study. Transportation and energy generation sectors consume 25.5% and 11.6%, respectively, of Hawaii's imported fossil fuels. Various nonedible feedstocks with information on their availability, production, and average yields of oils, fiber, sugars, and lipid content for liquid biofuels production are identified to add value to the total energy mix. The available biomass conversion technologies and production costs are summarized. In addition, a section on potentially using sewage sludge to produce biodiesel is also included. Based on a comparative analysis of kamani, croton, pongamia, jatropha, energycane, Leucaena hybrid, gliricidia, and eucalyptus feedstock resources, this study proposes that Hawaii and other similar tropical regions can potentially benefit from growing and producing economical liquid biofuels locally, especially for the transportation and electricity generation sectors
The Implementation of Audio Visual Aid Media During Covid 19 Pandemic in Elementary School Usman, Muhammad; Yusuf, Nidar
International Conference on Multidisciplinary Research Vol 3, No 2 (2020): ICMR
Publisher : Universitas Serambi Mekkah

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (140.459 KB) | DOI: 10.32672/pic-mr.v3i2.2699

Abstract

Media are considered very important to meet the objectives to be achieved during the teaching and learning process. Media are used so that the students can enthusiastically participate in the learning process. However, due to the situation during this pandemic, all teaching and learning activities were carried out online. This research aims to determine students' interest in participating in the online way when given learning videos. This study used a pre-experimental quantitative method with one group pre-test post-test design. The results of this study have shown that there was an increase in the learning process when using learning videos. After giving the treatment, students eagerly want to know and were highly motivated in taking part in the learning process. Besidesm they were not bored when doing assignments given by the teacher. The increase in student learning that occurs is included in the moderate category, namely 0.42 based on the results of the normalized gain test (N-Gain). Based on the data analysis using a Gain test, the result is 0.41. The second class experienced an increase in participating in learning activities when given a learning video in the medium category. It is also said to be in the medium category because 0.7 g ≥ 0.3.  the, from the result of the questionnaire regarding the use of interesting and educational learning videos, the parents and students agreed to use instructional videos. It is because by using learning videos of sufficient time, students easily understand the material taught by the teacher. The conclusion obtained is that the application of using interesting instructional videos can increase children's interest in taking lessons during online learning. Keywords: Learning Media, Audio Visual Aid, Online Classes 
The Utilization of Traditional Games for Early Childhood Development Usman, Muhammad; Yusuf, Nidar
International Conference on Multidisciplinary Research Vol 4, No 1 (2021): ICMR
Publisher : Universitas Serambi Mekkah

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (435.613 KB) | DOI: 10.32672/pic-mr.v4i1.3761

Abstract

The purpose of this research was to understand and describe the roles of traditional games in facilitating children’s development. In this modern era, many parents and teachers as early childhood educators are not aware of the importance of traditional gamesto optimize the growth and development of early childhood. In fact, traditional games are a good and affordable means for children to grow and develop. In this paper, theresearchersattempted to discuss the roles of traditional Bugis games as a medium for early childhood growth and development.This research was qualitative in nature because the researchers wanted to produce descriptive data (written or spoken) about people and observable behaviors during the play that can help the growth and development of children.To collect the data, the researchers used several instruments, namely observation, interviews, and documentation. Data multiplication was carried out based on the characteristics of the instrument. The results showed that traditional South Sulawesi Bugis games, with or without equipment, act asmedia for children's physical, social-emotional, language and cognitive development. The games becomean important means for children to socialize,learn to become a society member, andlearn to respectthe society’s rules. In the game-and-play situations, children can alsodevelopmathematical abilities and reasoning. Keywords: Traditional Bugis Games, Development, Early Childhood
Pemanfaatan Limbah Serbuk Teh sebagai Substitusi Serbuk Gergaji terhadap Pertumbuhan Miselium dan Produksi Jamur Tiram Putih (Pleurotus Ostreatus) Mardiana, Siti; Panggabean, Ellen L; Kuswardani, Retno A; Usman, Muhammad
Agrotekma: Jurnal Agroteknologi dan Ilmu Pertanian Vol 3, No 1 (2018): Jurnal Agrotekma Desember
Publisher : Universitas Medan Area

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31289/agr.v3i1.2065

Abstract

The waste of tea powder is abundant and has not been widely used optimally. The alternative use is to use the waste as an additional medium or substitution for the white oyster mushroom growing media. The purpose of the study was to determine the effect of mycelium growth and the production of the fruit of the white oyster mushroom on combination media / tea powder substitution with sawdust. The research design used was a completely randomized design (CRD) with 4 replications. Combined treatments were M0 = 100% sawdust; M1 = 100% Tea waste powder; M2 = 75% tea powder + 25% sawdust; M3 = 50% tea powder + 50% sawdust and M4 = 25% tea powder + 75% sawdust. All treatments used the composition of the manufacture of mushroom growing media consisting of each combination of treatments, bran 10% by weight of the material and lime 0.5% by weight of the material. The parameters observed were the growth of white oyster mushroom mycelium, the rate of mycelium growth, the time the mycelium closed the substrate, the time of appearance of the fruiting body, the weight of the fruit body and the diameter of the fruit hood. The results showed that all parameters differed significantly. The best treatment is in treatment M4, followed by treatment of M3, M0 and M2.
Co-Authors Abdul Rahman Ali, Majid Asif, Muhammad Asmah Indrawati, Asmah ’Begniga, Abdoulaye M Cross, Jeffrey Scott Kuswardani, Retno A Muhammad Rivai NIDAR YUSUF Panggabean, Ellen L Rizal Aziz, Rizal Rosliana Lubis, Rosliana Sartini Sartini Shuo Cheng Siti Mardiana