ABSTRACT Silica gel is one of the silica-based materials that has quite extensive uses such as in the pharmaceutical industry, ceramics, paints and special applications in the chemical field. This study aims to synthesize silica gel from Bengkalis Beach sand by varying the concentration of HCl during gel formation. Silica gel is synthesized through several stages starting with the leaching pro…
Pekanbaru City Forest is a source of learning about types of tree vegetation that can be made available as a learning medium in the form of a pocket book. This research aims to identify the types of vegetation found in the Pekanbaru city forest, as a guidebook for the classification of living conditions in high school which was carried out in May-July 2024 using a survey method. Identify tree v…
ABSTRACT Unlawful acts are actions that violate the rights or interests of other people which are protected by law. in unlawful acts, the perpetrator is asked to e held responsible. This rasearch aims to analyze the responsibility of PT Surya Sawit Mandiri for unlawful acts that occured in Koto Tandun Village, Rokan Hulu Regency. The main focus is the impact of environmental pollution caused b…
Online learning that has not been implemented properly can affect learning outcomes and the absence of learning motivation from students during online learning can also affect learning outcomes. This study aims to determine the effect of online learning and learning motivation on student learning outcomes in chemistry class X SMA /MA equivalent. The type of research conducted in this study is e…
This paper aims to determine the correlation between self-efficacy and communication anxiety among students at SMAN 1 Mandah. Self-efficacy is an individual's belief regarding his or her ability to carry out tasks or actions required to achieve tidak terlepas juga dari dunia pendidikan, dimana disekolah banyak juga siswa yang mengalami kecemasan komunikasi didepan umum. Proses belajar mengajar…
Koto Mesjid Village which is one of the tourist villages in Riau Province has a positive impact on the economy of the local community which has one of the natural attractions of Gagak River. In addition to being used as a tourist attraction, Gagak River is also one of the rivers that is used as a water reserve and is one of the sources of water for the community. However, it is currently known …
This problem was found from the author's observation of grade IV students of SD Negeri 123 Pekanbaru that when learning mathematics shows that in most of its learning it applies a mathematics learning approach that is still teacher oriented, so that students are not free to develop their reasoning skills and are less interested in participating in mathematics learning so that the learning …
This study aims to produce interactive media development products based on web blogs in terms of types of businesses by processing natural resources for grade V Elementary School. The method used in this research is the method of developing R&D (Research and Development) with a 4D model. There are 5 stages carried out, namely definition, design, development and dissemination. The media develope…
This research is motivated by the ability of students' mathematical understanding is still low. The aim of the research was to produce math worksheets with a realistic mathematics education approach to facilitate the mathematical understanding abilities of class VII SMP/MTs students on valid and practical comparison material with the ADDIE development model. The stages of the ADDIE model us…
Sansevieria trifasciata is a decorative plant and has a great interest because it can absorb more than 107 elements of harmful pollutants. Sanseviera spp is one of the world’s export plants. This plant is often infected by anthracnose disease caused by Colletotrichum sanseviera. Disease control using intensive chemical fungicides will harm the environment and humans. Endophytic Trichoderm…
ABSTRACT Automation of Motor Sein lights Using a Limit Switch, this tool is made to make it easier for motorcyclists to automatically turn off the turn signal, which sometimes forgets to turn off after turning. More and more data on accidents due to human negligence in driving, due to drowsiness, neglect, melamine or even forgetting to turn off the motorbike turn signal when turning, as ma…
Hydrazone is a versatile of organic compounds with the structure R1C=N-NHR2. Hydrazones containing an azomethine -NHN=CH- group which is known to possess diverse biological activities such as anticancer, analgesic, antibacterial, anticonvulsant, anti-inflammatory, and antimalarial. The addition of fluoro substituents to the aromatic ring has been shown to improve the pharmacological proper…
This research is motivated by advances in the field of Information and Communication Technology that have a big impact in people's social lives, this progress can have a positive impact and also a negative impact. Therefore, in anticipation of this, the Government of Indonesia issued UU No. 11 of 2008 on Information and Electronic Transactions, which was later revised to UU No. 19 of 2016 on In…
ABSTRACT Spirulina platensis is a microalgae from Cyanobacteria that used as a natural food in fish hatcheries and also as a food supplement for humans. This is due to its high nutritional value, including 63-68% protein, 18-20% carbohydrates, and 2-3% fat. Increased production of palm oil has serious side effects on the aquatic environment due to the disposal of palm oil mill effluent (PO…
Mud crab (Scylla serrata) is commodity fisheries that have high economic value. Enlargement of mud crab requires a relatively long time and growth is not optimal. The acceleration of growth can be done by applying the Recombinant Growth Hormone to the grouper kertang (rElGH), so that the growth rate will take place more quickly. In the enlargement activity, the injection ofr is not yet know…
This research is a difference in the development of the creativity of children who follow the entrepreneurship program with those who do not participate in the entrepreneurship program in TK Makarti and in TK Pertiwi sub-district Kepenuhan of Rokan Hulu district. This research is quantitative research comparative research type. The sample of this study was 66 children and this study used a sat…
This research aimed to develop computer-based learning media on similarity and congruence topic for 9th students. This research and development use R&D model by Borg and Gall modified by Sugiyono. Development is done through the following steps: (1) potentials and problems; (2) data collection; (3) design media: (4) validation; (5) revision; (6) small group trying out; (7) revision; (8) field t…
Activated carbon from cassava peel has been produced using chemical activation with Zinc Cloride (ZnCl2) as activator assisted by microwave irradiation with the output power 630 watt for 20 minutes. Concentration of ZnCl2 was varied 1M, 2M and 3M. The aim of this study to is determine the morphological characteristics, microstructure, contents of elements and the adsorption of activated carbon …
ABSTRACT This research is to determine the effect of Leadership, Discipline and Organizational Culture on The Performance of the State Employees at Badan Pendapatan Daerah in Dumai. The performance of the state employees at Badan Pendapatan Daerah in Dumai amounting to 74 peoples, the number of samples in this study were 74 respondents. The Primary data were collected using a questionna…
This thesis discusses two three-step iterative methods which are derived by combining the iterative methods that contain the function and first derivative with Newton’s method. The process of the combination uses the principle of an undetermined coefficient method by allowing only one additional function evaluation that may occur in the process. By combining the methods proposed by Khattri an…