bluuebunny/crossref_metadata_2025 huggingface dataset:
EFEKTIFITAS TEPUNG IKAN LOKAL DALAM PENYUSUNAN RANSUM PAKAN IKAN NILA Oreochromis niloticus
Authors: Setyono Bagus Dwi Hari , Scabra Andre Rachmat , Marzuki Muhammad , Sudirman Sudirman
Published: February 2022

Dalam industri perikanan budidaya, pakan memegang peranan yang cukup vital karena lebih dari 50% biaya produksi adalah untuk biaya pengadaan pakan. Pakan yang digunakan tidak hanya harus mengandung kadar nutrisi yang baik, tetapi juga terjangkau secara ekonomis. Semakin baik kualitas pakan, diiringi dengan semakin murah pakan tersebut, maka keberhasilan kegiatan produksi ikan dapat terjamin. Tujuan penelitian ini adalah untuk meningkatkan penggunaan tepung ikan lokal sebagai pengganti tepung ikan komersil dalam formulasi pakan ikan nila. Penelitian ini menggunakan model Rancangan Acak Lengkap (RAL) yang terdiri dari empat perlakuan dan tiga ulangan. Perlakuan yang diterapkan adalah pemberian ikan dengan pakan buatan yang terbuat dari kombinasi tepung ikan lokal dengan tepung ikan komersial dengan dosis yang berbeda. Perlakuan dalam penelitian adalah A (tepung ikan komersil 30% + tepung ikan lokal 0%), B (tepung ikan komersil 20% + tepung ikan lokal 10%), C (tepung ikan komersil 10% + tepung ikan lokal 20%), dan D (tepung ikan komersil 0% + tepung ikan local 30%). Hasil uji analisis ragam (ANOVA) menunjukkan bahwa perlakuan tidak memberikan pengaruh nyata terhadap nilai Survival Rate (SR), namun memberikan pengaruh nyata terhadap nilai Spesifik Growth Rate (SGR), Feed Convertion Ration (FCR) dan kadar Glukosa Darah (GD). Nilai SR berturut-turut dari perlakuan A, B, C, dan D adalah 96.7 %, 96.7 %, 96.7 %, dan 100 %. Nilai SGR berturut-turut dari perlakuan A, B, C, dan D adalah 0.15 %/hari, 0.24 %/hari, 0.29 %/hari, 0,35 %/hari. Nilai FCR berturut-turut dari perlakuan A, B, C, dan D adalah 10.25, 7.47, 5.00, dan 4.16. Nilai GD berturut-turut dari perlakuan A, B, C, dan D adalah 217.67 mg/dL,  160.33 mg/dL, 155.00 mg/dL, dan 132.67 mg/dL. Kualitas air selama penelitian masih tergolong dalam kisaran optimum kualitas air pemeliharan ikan nila, yaitu suhu 29.0?31.9 oC, pH 7.0?8.2, DO 4,3?5,9 mg/L, dan amonia 0,0011–0,0293 mg/L. Kesimpulan dari kegiatan penelitian ini adalah, penggunaan pakan ikan dengan menggunakan formulasi bahan baku tepung ikan lokal dapat digunakan sebagai pengganti tepung ikan komersil.
POTENSI PEMANFAATAN DAUN SINGKONG (Manihot utilissima) TERFERMENTASI SEBAGAI BAHAN PAKAN UNTUK MENINGKATKAN PERTUMBUHAN IKAN MAS (Cyprinus carpio)
Authors: Nurul Aisyah Alfirah , Setyowati Dewi Nur’aeni , Astriana Baiq Hilda
Published: February 2022

Penelitian ini bertujuan untuk meganalisis pengaruh penambahan tepung daun singkong terfermentasi dalam pakan buatan terhadap pertumbuhan ikan mas serta konsentrasi optimum untuk menghasilkan pertumbuhan dan tingkat kelangsungan hidup yang tinggi bagi ikan mas. Metode yang digunakan pada penelitian ini adalah metode eksperimental dengan Rancangan Acak Lengkap (RAL) dengan menggunakan 5 perlakuan dan 3 kali ulangan. Perlakuan yang dicobakan adalah penambahan tepung daun singkong terfermentasi sebanyak 10%, 15%, 20%, 25% dan 0% tanpa fermentasi daun singkong. Parameter yang diamati pada penelitian ini yaitu laju pertumbuhan mutlak, laju pertumbuhan spesifik, kelangsungan hidup (SR), rasio konversi pakan dan efisiensi pakan. Hasil analisis sidik ragam (ANOVA) pada pertumbuhan mutlak dan laju pertumbuhan spesifik berbeda nyata/signifikan (P<0,05), dan memberikan pengaruh yang tidak berbeda nyata/ tidak signifikan (P>0,05) pada Survival rate, Rasio Konversi Pakan dan Efisiensi Pakan.
IDENTIFIKASI JENIS DAN KELIMPAHAN GASTROPODA DI PANTAI TELUK SEPANG KOTA BENGKULU
Authors: Slamet Rizki , Purnama Dewi , Negara Bertoka Fajar SP
Published: February 2022

Gastropoda merupakan keong yang bernilai ekonomis tinggi karena cangkangnya diambil sebagai bahan untuk perhiasan dan cinderamata, sedangkan dagingnya merupakan makanan yang lezat. Beberapa jenis keong yang bernilai ekonomis diantaranya dari famili Strombidae, Cypraeidae, Olividae, Conidae, dan Tonnidae. Mempelajari pentingnya manfaat Gastropoda, maka diperlukan adanya kajian tentang hewan tersebut. Oleh karena itu peneliti tertarik untuk melakukan penelitian mengenai hewan Gastropoda yang meliputi jenis dan  kelimpahan gastropoda di perairan Kota Bengkulu khususnya di Pantai Teluk Sepang Kota Bengkulu. Penelitian ini menggunakan metode survei dengan menggunakan transek 1x1 meter. Data yang diukur berupa data identifikasi dan data kelimpahan Gastropoda. Berdasarkan hasil penelitian, terdapat sembilan jenis Gastropoda dengan kelimpahan yaitu 216 ind/m2 Cerithidea cingulata, 7 ind/m² Natica gualteriana, 3 ind/m² Trochusconus, 8 ind/m² Turbo chrysostomus, 7 ind/m2 Telescopium telescopium, 9 ind/m2 Strombus labiatus, 162 ind/m2  Cerithidea obtuse, 3 ind/m2  Vexillum rugosum, dan 164 ind/m2  Cerithide aquadrata.

 

Kata kunci: Gastropoda, Pantai Teluk Sepang, identifikasi, Moluska
MORFOMETRIC AND MERISTIC CHARACTERISTICS OF FIVE TYPES OF clownfish (Amphiprion sp.) FROM AMBON ISLAND
Authors: Sahusilawane Helena Afia , Soelistyowati Dinar Tri
Published: February 2022

Amphiprion is one of the genera in the Pomacentridae family which is dominant on coral reefs in the waters of Ambon Island. This fish has interesting morphological characteristics, unique reproductive behavior, and has a symbiosis with sea anemones as a host and has high adaptability in captivity. The diversity of species in the genus Amphiprion is high based on varying morphological characters. The purpose of this study was to characterize the morphometric and meristic characters of five types of clown fish (Amphiprion sp.) from the island of Ambon. The morphometric characteristics were measured by measuring 24 characters, while the meristic characteristics were calculated using 5 characters in parent fish Amphiprion clarkii, A. frenatus, A. ocellaris, A. percula, and A. sandaracinos which had been kept for 1 year at the Ambon Marine Aquaculture Center. The data of morphometric and meristic characteristics were evaluated using principal component analysis (PCA). The relationship between individuals was analyzed using genetic distance based on the UPGMA program from PAST software. The results of PCA analysis showed differences in morphometric characters and the five types of clownfish formed two main clusters, the first cluster consisted of A. ocellaris and A. percula and A. sandaracinos, and the second cluster consisted of A. clarkii and A. frenatus. This clustering can provide information for breeders and cultivators in the development of clown fish cultivation in breeding programs.
PEGARUH SUBSTRAT BERBEDA TERHADAP PENEMPELAN TELUR PADA PEMIJAHAN IKAN BADUT (Amphiprion Ocellaris)
Authors: Oktavianti Velita , Cokrowati Nunik , Setyono Bagus Dwi Hari
Published: February 2022

Pada pemijahan ikan badut dibutuhkan sebuah perlakuan pada manipulasi tempat asal ikan badut untuk melakukan pemijahan pada wadah budidaya. Substrat genteng dan keramik cocok untuk penempelan larva ikan badut karena tekstur dari ke dua substrat tersebut keras, hal ini menunjukkan bahwa jenis substrat keras akan dapat di jadikan tempat hidup ikan badut, karena sifat ikan badut harus tumbuh dan berkembang dalam substrat keras. Penelitian ini dilakukan dengan tujuan untuk mempelajari perbedaan kelangsungan hidup larva ikan badut pada substart berbeda. Penelitian ini dilakukan selama 45 hari, terhitung mulai tanggal 1 september sampai tanggal 15 oktober 2021 di Balai Perikanan Budidaya Laut Lombok (BPBLL). Metode yang di lakukan dalam penelitian adalah dengan menggunakan metode eksperimen dengan pola Rancangan Acak Lengkap (RAL) dengan empat perlakuan 3 kali ulangan, yaitu P1 (substrat keramik), P2 (substrat genteng), P3 (substrat paralon), P4 (substrat gerabah). Hewan uji yang di gunakan pada penelitian ini adalah indukan ikan badut (Amphiprion ocellaris) jantan dan betina yang berumur berkisar antara 4-5 tahun. Berdasarkan penelitian yang sudah di lakukan terdapat hasil fertilisasi P1= 88.67%, P2= 94.17%, P3= 83.83%, P4= 78.67%. Sedangkan hasil daya tetas P1= 88.67%, P2= 94.17%, P3= 83.83%, P4= 78.67%. Dan hasil dari kelangsungan hidup P1= 82.15%, P2= 82.84%, P3= 80.94%, P4= 80.11%. Kesimpulan dari penelitian ini adalah bahwa penggunaan substrat keramik, genteng, paralon, dan gerabah memberikan pengaruh terhadap fertilisasi dan daya tetas telur ikan badut. Kelangsungan hidup tidak berpengaruh nyata terhadap penggunaan substrat pada pemijahan ikan badut.
Analisis Kualitas Sensori Ikan Asap Berbahan Bakar Briket Campuran (Arang Bonggol Jagung dan Daun Jati) dan Bahan Bakar Kayu
Authors: Sukowati Dwi , Prasetyo Dwi Yanuar Budi , Yuwono Triat Adi
Published: February 2022

This study aims to analyze the sensory quality of smoked fish using mixed briquette fuel (teak leaves and corncob charcoal) with 5% and 10% adhesives with smoked fish using wood fuel. The wood used for comparison is ruby (soft texture) and mahogany (hard texture). Sensory analysis in this study emphasizes the appearances, colors, smells, tastes and textures of smoked fish. To determine whether there is a significant difference or not of the four treatments on the results of smoking fish,this study use Analysis of Varians (Anova). The results showed that there were significant differences between the four methods of feeding fish using briquette and wood fuel on appearances, colors, smells and textures. The appearance, color and aroma that dominate the specifications of other smoked fish are smoked fish with 10% adhesive briquette fuel treatment. The texture of smoked fish with mahogany wood fuel shows better specifications than asp fish with other treatments. Because there is a significant difference, a further test is carried out using BNJ Test. BNJ Test must be done to find out the distinguishing relationship between samples.ÃÂ  Whereas in the taste test, there was no significant difference from the treatments
Profile of students ocean literacy at senior high school in Mataram
Authors: Zohri Lalu Hasan Nasiruddin , Irmayani Irmayani , Muksin Yufika Dewi , Syukur Abdul , Jamaluddin Jamaluddin
Published: February 2022

Ocean literacy is knowledge about the biophysical and ecological aspects of the ocean that have relevance to the topic of biology learning. This study aims to classify the profiles on ecosystem topics of t he ocean literacy of the high school students of SMA 1 Mataram. This study uses an observational approach with a purposive sampling technique, while the data analysis used is descriptive statistical analysis. Furthermore, the samples of this study are 186 of 848 students. The classification of studentsÃ¢â¬â¢ literacy on ocean ecological aspects in SMA 1 Mataram are: the percentage of correct answers on indicator 1 is 41.55%, indicator 2 is 68.55%, and indicator 3 is 41.40%. This study concludes that high school students at the study site have not had sufficient knowledge about ocean ecology. However, some materials, such as ocean ecosystems, can be a source of learning to improve students' literacy about ocean ecologies, such as tropical structures in a coral reef, seagrass, and mangrove ecosystems. Therefore, it is necessary to innovate learning resources from ocean environments, especially schools close to the sea, such as a high school in the study site and other high schools in other places
Chemical content in the sembeq traditional rituals of the Lombok Community
Authors: Andayani Yayuk , Burhanuddin Burhanuddin , Hakim Aliefman , Loka I Nyoman , MutiÃ¢â¬â¢ah MutiÃ¢â¬â¢ah
Published: February 2022

This study aims to identify and describe the chemical content in the sembeq traditional rituals, especially in the medicinal purpose of the Lombok community. Qualitative approach research with a phenomenological approach is used in focusing on data collecting of the Sembeq tradition. Data on indigenous knowledge of the community was obtained through interviews with Belians, who were the key informants. Data in the form of narration were analyzed descriptively. The results showed that in the Sembeq tradition, which is used for medicinal purposes, the main ingredients are betel leaf, areca nut, and fine lime. Chemical content relevant to the sembeq tradition includes secondary metabolites, mixtures, chemical reactions, bases, solution pH, and surface area.
Potential analysis of Asian toad (Duttaphrynus melanostictus) as a controller of harmful insects and their substitutions in elementary school science lessons
Authors: Syazali Muhammad , Artayasa I Putu , Ilhamdi Mohammad Liwa
Published: February 2022

The house toad (Duttaphrynus melanostictus) is a highly adaptable amphibian species, and is commonly found in urban areas. On Lombok Island, this species has the highest abundance in non-forest habitat types. In their habit, amphibians function as predators of various types of insects and various types of invertebrates. There are several research reports on prey items from Duttaphrynus melanostictus, but information regarding its role as control of harmful insects is still limited, especially on the island of Lombok. On the other hand, science learning aims to introduce the surrounding environment to students. Therefore, integrating the roles of species commonly found in these settlements is a necessity. The purpose of this study was to analyze the potential of Duttaphrynus melanostictus as a pest control insect, and its urgency in science learning, especially in elementary schools. The study was conducted using gastric surgery analysis method. The frog's stomach was taken continuously until the data was saturated, i.e. the data obtained were the same as the previous surgeries. The results showed that Duttaphrynus melanostictus preyed on 14 types of insects. There are 12 species (85.71%) of which are harmful insects. If classified, 9 species (75%) are insect pests, and 3 species (25%) are disease vectors. Information on the role of this species can be substituted for science lessons in elementary school. The appropriate topics are (1) the importance of balancing and preserving natural resources in the environment, and (2) the relationship between ecosystem components and food webs in the surrounding environment.
The development of sisperman games on science teaching for primary school student
Authors: Juliana Juliana , Dewi Nurul Kemala , Khair Baiq Niswatul
Published: February 2022

This study aims to determine the development steps and the feasibility of the Sisperman snake and ladder game media in science learning for the fifth-grade students of Elementary School Students, SDN 1 Labuan Lombok, in the 2020/2021 school year. The ADDIE model (analysis. design, development, implementation, evaluation) developed by Robert Maribe Brach was applied for producing the learning media. The study subjects were 24 students of fifth-grade students. The data collection was done by interviewing, observing, documenting, and filling out questionnaires. Qualitative and quantitative data analysis techniques were implemented for analysis techniques. This study indicates that the developed Sisperman snake and ladder game media is very suitable for being used as a learning medium. The final assessment obtained from the media expert test getting a percentage value of 96.42%. It means the media is categorized as highly valid criteria. From material content, the experts give the score a percentage value of 91.66%, which shows highly good criteria. The practicality from the student responses offers a percentage value of 92.01% with highly practice criteria.
Development of learning devices based on discovery learning model on global warming topic to improve student learning motivation and outcome
Authors: Safana Mega , Zuhdi Muhammad , Ã¢â¬ËArdhuha Jannatin
Published: February 2022

This study aims to develop learning devices based on a discovery learning model on global warming topics that are feasible to improve student physics learning motivation and outcome. The research is a research and development study with the ADDIE model standing for Analyze, Design, Development, Implement, and Evaluate. The developed research instruments are syllabus, Lesson Plan (LP), Student Worksheet (SW), learning video, and test instrument. Meanwhile, data collection instruments include a validation sheet, motivation questionnaire, along pre-test and post-test sheets. Paired sample T-test was used to assess the comparative hypothesis of the two samples' average. The research instruments were developed at the Department of Physics Education Laboratory, Faculty of Teacher Training and Education, University of Mataram and applied in XI MIA 1 class of State Madrasah Aliyah 1 Mataram. Those instruments were syllabus, LP, SW, and test instruments. The developed learning devices based on the discovery learning model were assessed by three expert validators, physics lecturers, resulting in learning devices with "very good" criteria. Hence, the learning devices based on the discovery learning model were feasible to be applied to improve student physics learning motivation and outcome. Based on the implementation of learning devices at State Madrasah Aliyah 1 Mataram, student physics learning motivation was increased by 0.53. In contrast, student physics learning outcome on global warming was improved by 0.47; therefore, both were categorized as "medium". According to paired sample t-test using SPSS 22, the physics learning outcome was 0.000 < 0.005 indicating a significant difference between before and after the learning treatment on students.
The development of learning media and critical thinking skill instrument based on 5E learning cycle model on harmonic vibration material
Authors: Sulastri Malahayati Rahayu , Ã¢â¬ËArdhuha Jannatin , Zuhdi Muhammad
Published: February 2022

This study aims to produce products in the form of learning media and instruments based on the 5E learning cycle model on harmonic vibrationÃÂ material. It isÃÂ development research usingÃÂ the ADDIE model consisted of 5 stages:ÃÂ analysis, design, development, implementation, and evaluationÃÂ stagesÃÂ (this study wasÃÂ limited to the development stage). The products developed were Syllabus, Lesson Plan, Student Worksheets, and Critical Thinking Skill Instruments in Physics. The feasibilityÃÂ of the learning mediaÃÂ and instrument developed was measuredÃÂ by three expertsÃ¢â¬â¢ validation by calculating the validity and reliability values of the media and instrument. The validity results basedÃÂ on the expertsÃ¢â¬â¢ assessment showed that the score of the syllabus wasÃÂ 3.70 with very valid criteria. The Lesson PlanÃÂ was 3.66 withÃÂ very valid criteria; the LKPD wasÃÂ 3.66 withÃÂ very valid criteria, and the Critical Thinking Skill Instrument in Physics wasÃÂ 3.63 included in the very valid criteria. The reliability results of the syllabusÃÂ were 94.52%, the Lesson PlanÃÂ was 90.36%, the LKPDÃÂ was 91.78%, and the Critical Thinking Skill Instrument in Physics wasÃÂ 93.62%, indicating that all aspects assessed hadÃÂ a reliable category. BasedÃÂ on these results, it can be concludedÃÂ that the learning media and instrument developed are feasibleÃÂ to use in learning to improve students' critical thinking skills in Physics on harmonic vibrationsÃÂ material.
Analysis of student scientific literacy: study on learning using ethnoscience integrated science teaching materials based on guided inquiry
Authors: Wati Sakila , Idrus Agil Al , Syukur Abdul
Published: February 2022

There are still few teachers who develop their teaching materials independently. There is also no continuity in science learning between scientific knowledge with real-life problems and local wisdom. As a result, learning is less meaningful, and students' scientific literacy skills remain low. This study aims to develop ethnoscience integrated science teaching materials based on guided inquiry that are appropriate and effective in improving students' scientific literacy. This study is development research that refers to the 4D development model. In addition to developing ethnoscience integrated science teaching materials based on guided inquiry, the researchers also developed syllabus, lesson plan, and students' scientific literacy instrument. The data collection technique used a validation sheet by three expert lecturers who are competent in their fields to measure the feasibility of the teaching materials. The scientific literacy instrument used multiple-choice questions. The data analysis technique used the validation percent index and the N-gain test to determine the increase in scientific literacy. Thi study obtained: 1) ethnoscience integrated science teaching materials (90); 2) syllabus (93); 3) lesson plan (90); and 4) scientific literacy instrument (90) with very valid and valid criteria; and revealed that 5) ethnoscience integrated science teaching materials can improve students' scientific literacy, as evidenced by the average score obtained by three schools with high improvement criteria. To summarize, this ethnoscience integrated science teaching materials based on guided inquiry are feasible and effective to be applied and implemented in learning to improve students' scientific literacy.
In vitro concentration optimization of ethanol extract from Makasar fruit seeds (Brucea javanica L. Merr) as an anti-inflammatory agent
Authors: Almira Diva , Subaidah Windah Anugrah , Ananto Agus Dwi , Deccati Rizqa Fersiyana , Muliasari Handa
Published: February 2022

Anti-inflammatory medications are necessary to treat excessive inflammation reactions due to injury, infection, or irritation. The emergence of several adverse effects associated with synthetic anti-inflammatory drugs has prompted the continued use of anti-inflammatory agents derived from natural products with low side effects and a high therapeutic effect. While it is well established that the seeds of the Makassar fruit (Brucea javanica (L.) Merr.) ÃÂ have anti-inflammatory activity, the optimal concentration of Makasar fruit seed extract for anti-inflammatory activity is unknown. This study aims to determine the optimal Makassar fruit seed extract concentration as an in vitro anti-inflammatory. The seeds of the Makasar fruit were extracted using the sonication method (3 x 35 minutes) in 96% ethanol and then concentrated using a rotary evaporator. The secondary metabolites of Makasar fruit seed extract were then identified in the test tubes, and the anti-inflammatory activity was determined using the protein denaturation inhibition method. The results indicated that the extract produced had a yield of 10.03%. The Makassar fruit seed extract contains secondary metabolites of phenolics, flavonoids, and terpenoids. Makasar fruit seed extract exhibited the optimum anti-inflammatory activity at a concentration of 1%, with a 55.47%ÃÂ inhibition of protein denaturation.
The effect of cooperative learning model of team game tournament (TGT) type on students mathematical learning achievement of junior high school
Authors: Arifuddin Muhammad , Hayati Laila , Amrullah Amrullah , Baidowi Baidowi
Published: February 2022

This research aims to find out the effect of cooperative learning models of the Teams Games Tournament (TGT) type on the studentsÃ¢â¬â¢ mathematics learning achievement of the 8th-grade students of SMPN 13 Mataram Academic Year 2019/2020. This study is a quasi-experimental with the post-test only non-equivalent control group design type. The population of the research was the whole 8th-grade students of SMPN 13 Mataram Academic Year 2019/2020. In determining the sample, probability sampling was being used in the of form cluster random sampling, the sample of the research was the VIII-A class as the experimental class and VIII-B class as the controlling class. The instrumen which was used in this research was the test of the students learning achievement (post-test). Quantitave analysis obtained by using t-test. The results of this research showed that there were differences in students learning outcomes with the TGT type cooperative model and direct learning model students. By the effect size method, we obtain that the effect of TGT type on the student's achievement was high category. Furthermore, thatÃ¢â¬â¢s mean that TGT type can be given a high effect on students' achievement in the concept of linear equation system for two variables. For teachers, especially in SMPN 13 Mataram should be an alternative learning model of the TGT cooperative model as an one of the next mathematics learning.
The Effect of vermicompost and NPK fertilizer on tomato (Solanum lycopersicum) growth
Authors: Raksun Ahmad , Ilhamdi Mohammad Liwa , Merta I wayan , Mertha I Gde
Published: February 2022

Tomato is a plant of solanaceae family, has short stems, and grows well in tropical climates. Tomatoes have vegetative and generative growth phases. The availability of nutrients largely determines the vegetative growth phase. The purpose of the study is to determine: (1) the effect of vermicompost on tomato growth, (2) the effect of NPK fertilizer treatment on tomato growth, (3) the interaction effect of vermicompost and NPK fertilizer on tomato growth. The research was conducted using experimental methods. The research was carried out from April to July 2021. The research design was a 4 x 5 complete random factorial design with three repetitions. NPK fertilizer consisted of 4 levels of treatment doses, while vermicompost consisted of 5 levels of treatment doses. The research finding shows that the application of NPK fertilizer of 0.8 grams per plant significantly affected stem diameter, the number of compound leaves, leaf length, and stem height of tomatoes. Treatment of vermicompost of 1.8 kg of vermicompost resulted in the best stem diameter, number of compound leaves, leaf length, and stem height. The combination of vermicompost and NPK fertilizer had no significant effect on stem diameter, the number of compound leaves, leaf length, and stem height of tomatoes.
The landslides mechanism on the slopes of mount rinjani due to the july 2018 Lombok earthquake
Authors: Zuhdi Muhammad , Syamsuddin Syamsuddin , Sukrisna Bakti
Published: February 2022

The Lombok earthquake that occurred in succession, which began at the end of July 2018, triggered landslides on several slopes on Mount Rinjani. The vibrations caused by the earthquake make the slopes unstable due to a decrease in the normal force as a component of the frictional force that binds the deposited material on the mountain slopes. The standard power is one factor that influences the friction force as a material binding to resist landslides. Under ordinary conditions, the average pressure depends on mass, gravity, and the slope's slope. During an earthquake, the normal force can be significantly reduced, causing landslides to occur. The slope stability angle shows the maximum slope angle susceptible to landslides due to an earthquake shock. The greater the peak ground acceleration (PGA) due to an earthquake, will have a landslide effect at a smaller tilt angle. The means that a significant shock due to an earthquake on a slope will be able to launch a landslide on a gentle slope, whereas a small shock can only slide a steep slope with a large angle. From the calculation of slope stability, which depends on the static friction coefficient, and PGA, which depends on the earthquake magnitude and the distance of the earthquake source from the slopes of Mount Rinjani, it gives a maximum value of 61.9o and a minimum value of 45.76o.
Development of student worksheet based on MEA model of ionic equilibrium and pH of buffer solution for Senior High School
Authors: Nelda Nelda , Holiwarni Betty , Anwar Lenny
Published: February 2022

This research aims to develop a Student Activities Worksheet Based on the MEA Model on the ionic equilibrium and pH of buffer solution material for grade XI SMA/MA. Student Worksheet Based are designed according to the stage of the MEA learning model. The type of this research is research and development (R and D) about the development process of 4-D. The object of this research is student activities worksheets based on MEA. The data collection is the validation user response questionnaire. The validity of the content aspect obtained the result of data analysis, characteristics of MEA, language aspect, serve aspect, and visual aspect are 96.43%, 93.33%, 85.41%, 97.22%, 97.91% with valid category. Student activities worksheets validated by the validators tested to 25 students and three teachers. The test responses by 25 students and three chemistry teachers included very good criteria, with each score of 95% and 80.33%. Based on the result of data analysis, student activities worksheets based on MEA of ionic equilibrium and pH of a buffer solution produced are valid.
Analysis of heavy metal content of cadmium (Cd) in milkfish (Chanos chanos Forsk) from milkfish farms in Bima Bay
Authors: Muslim Bukhari , Khairuddin Khairuddin , Yamin M. , Kusmiyati Kusmiyati
Published: February 2022

The research aims to analysis of the content of heavy metals cadmium (Cd) in milkfish (Chanos chanos Forsk) from the encroachment of Bima bay at year 2020. The benefit of this study is to provide information related to the content of heavy metals cadmium (Cd) in milkfish (Chanos chanos Forsk) and protect the community or consumers from heavy metal contaminants. The research was conducted in Bima Bay, namely in 2 research locations, namely Malay village, Bima City, and Palibelo, Bima Regency. This type of research is descriptive explorative researchÃ¢â¬âsampling techniques using purposive sampling. Samples of milkfish were taken directly on the pond area of 3 heads in each location. Then the sample is put in the sample box that has previously been washed clean. The research samples were then analyzed of the content of heavy metal cadmium (Cd) using Atomic Absorption Spectrophotometer tool. The results showed that at the palibelo research site, Bima Regency in PB 1 samples contains cadmium (Cd) of 30 ppm, PB 2 samples of 40 ppm, and PB 3 samples of 10 ppm. Furthermore, at the location of Malay village, Bima City on KM 1 sample of 30 ppm, on KM 2 sample of 40 ppm, and KM 3 sample of 20 ppm. The content of heavy metal cadmium (Cd) in milkfish (Chanos chanos forsk) from Bima Bay exceeds the threshold by BPOM Regulation No. 5 of 2018 is 0.1 ppm. The presence of heavy metal content cadmium (Cd) that exceeds this threshold indicates that the waters of Bima Bay have been contaminated by heavy metals Cadmium (Cd).
The effect of air quality due to household waste sewers on the growth of cayenne pepper (Capsicum frustescens L.)
Authors: Iskandar Suhendra
Published: February 2022

Research has been carried out on the effect of air pollution due to household sewage on the growth of cayenne pepper (Capsicum frustescens L.). A total of 12 samples were divided into 4 groups: 3 samples in the group placing planting locations near the sewers, 3 samples in the group placing planting locations near the sewers and giving liquid NPK fertilizer once a day, 3 samples in the group placing planting locations in places with high-quality clean air, and 3 samples in the planting location group in places with clean air quality and application of liquid NPK fertilizer once a day. The sample growth was observed for 90 days to see the difference in growth in each sample group. It was found that the samples in the group placing the planting location near the sewer, both those who were given and those who were not given liquid NPK fertilizer once a day, showed severe shrinkage symptoms in 13-14 days after planting. The samples placed in a place with clean air quality without liquid NPK fertilizer showed growth disorders in the 60 days after planting. Meanwhile, samples placed in a place with clean air quality and given liquid NPK fertilizer once a day showed fertile growth.
Guided inquiry learning model application to train the students analysis skills on factors that affect reaction rate materials
Authors: Firmanda Dhevira Aptia , Novita Dian
Published: February 2022

The study aims to describe the applicability of learning model implementation, student activities, learning outcomes, students' analytical skills, and student responses with guided inquiry learning models application. The method used is one group pretest-posttest design with 24 students of XI IPA class. Research shows that (1) quality guided inquiry learning percentage during two meetings is 94.44% and 95.75%, respectively. (2) relevant student activity has an average percentage of 94.64%. (3) student learning outcomes in the factor that affects reaction rate material increases with n-gain scores obtained 83.68% in the high category. (4) the results of student analytical skills on each component with a high category n-gain score are element analysis was 95.83%, relationship analysis was 58.33%, and analysis of organizational principles was 79.17%. (5) the student response had very good category results with a percentage of 98.61%.ÃÂ
Development of student worksheets based on guided inquiries to train students science process skills on reaction rate materials
Authors: Nurfidayanti Haridha Nurfidayanti , Yonata Bertha
Published: February 2022

This study aims to determine the validity, practicality, and effectiveness of the worksheets developed for the chemical learning of students' reaction rates. This research is focused on the guided inquiry learning model to improve students' science process skills. The research sample was 36 students of class 11 MIPA 4 SMAN 1 Puri, Mojokerto Regency. The research model used the One Group Pretest and Posttest Design. The data analysis technique used normality test, paired sample t-test, and n-gain test. The validation results show that 93.3% is valid. An average of 98% of students showed a positive response to the developed Student Worksheets. In addition, students carry out relevant activities with 90.2% when learning takes place. The pretest-posttest of cognitive domains and science process skills showed what usually distributed the data. The paired sample t-test test showed a difference in the pretest-posttest results, and the n-gain test showed an increase in the pretest-posttest. The Student Worksheets Developed are valid, practical, and effective for use in learning chemistry for the Reaction Rate material and can train students' science process skills.
Implementation of guided inquiry learning model to exercise students critical thinking skills on reaction rate material
Authors: Wilatika R. Ayu Sofiah , Yonata Bertha
Published: February 2022

The goal of this study is to explain how the inquiry-based learning model is put into practice, student activities during learning, critical thinking skills learning results, and learning outcomes in knowledge. Students in class XIÃÂ­-IPA 5 SMA Negeri 1 Menganti Gresik Jawa Timur were the study's subjects. This type of study uses a pre-experimental design with a One-Group Pretest-Posttest Design. Data analysis using percentage techniques, normality tests, N-Gain, and paired sample t-test showed a sig value ofÃÂ  0.000. (1) The quality of the guided inquiry learning model implementation was 93% in Phase 1.94% in Phase 2.93% in Phase 3.91% in Phase 4.88% in Phase 5, and 90% in Phase 6, according to the findings of this study; (2) Relevant student activities dominate irrelevant student activities; (3) The average value of N-gain on the interpretation indicator of 0.80 (high), inference of 0.84 (high), analysis of 0.74 (high), and explanation of 0.76 (high) indicates that students' critical thinking skills have improved; (4) In the area of knowledge, learning outcomes of students achieved classical completeness of 91.43%, which exceeded the Minimum Completeness Criteria.
Pemanfaatan Teknologi Budikdamber (Budidaya Ikan di dalam Ember) Sebagai Model Urban Farming Berkelanjutan
Authors: Scabra Andre Rachmat , Muhammad Marzuki  , Bagus Dwi Hari Setyono  , Laily Fitriani Mulyani
Published: February 2022

Ikan merupakan bahan pangan yang berkualitas tinggi dan sangat bermanfaat bagi kesehatan tubuh. Berbagai manfaat dari daging ikan hanya akan diperoleh apabila ikan yang dikonsumsi berada dalam keadaan segar. Dalam kondisi yang tidak segar (busuk), kandungan gizi yang ada pada daging ikan menjadi rusak. Salah satu upaya yang dapat dilakukan agar konsumsi ikan segar dapat dilakukan secara kontinyue adalah dengan melakukan kegiatan urban farming, yaitu budidaya ikan dalam ember (budikdamber). Kegiatan pengabdian kepada masyarakat ini bertujuan untuk meningkatkan pengetahuan dan memberikan bimbingan tekhnis kepada mitra yang terlibat dalam hal aplikasi tekhnologi budidaya ikan dalam ember. Kegiatan pengabdian  kepada masyarakat ini dilakukan melalui berbagai metode kegiatan yang tersusun secara terstruktur yaitu survei lokasi, penyusunan materi sosialisasi dan bimbingan tekhnis kegiatan, pembentukan model teknologi, pendampingan pelaksanaan tekhnis, dan evaluasi.  Kegiatan dilaksanakan pada kelompok pemuda Jangkar Ampenan yang berlokasi di Lingkungan Tangsi, Kecamatan Ampenan Selatan, Kota Mataram. Materi yang disampaikan saat kegiatan berlangsung meliputi persiapan (alat, bahan, metode kerja), tekhnis perakitan perangkat budidaya ikan, manajemen pemberian pakan, manajemen kualitas air, dan manajemen panen. Alat dan bahan yang diperlukan dalam kegiatan ini meliputi ember berkapasitas 150 liter, ikan lele berukuran 5-7 g/ekor, pakan ikan lele komersil, bibit kangkung, pipa, kawat, gelas plastik berukuran 200 ml, bor dan grinda, seser, dan aerator. Berdasarakan kegiatan yang telah dilakukan, kesimpulan dari kegiatan pengabdian kepada masyarakat ini adalah telah disampaikannya informasi, pengetahuan, dan bimbingan tekhnis kepada mitra tentang tekhnologi budidaya ikan dalam ember (budikdamber).
“MENUJU TARAKAN ZERO WASTE “ PENGELOLAAN SAMPAH PLASTIK DENGAN METODE ECOBRICK di KELURAHAN SELUMIT PANTAI TARAKAN TENGAH
Authors: Alawiyah Tuti , Haryono Gandri , Putra Boy
Published: February 2022

Pengelolaan sampah perkotaan masih menjadi permasalahan yang sulit dipecahkan oleh pemerintah. Penanganan sampah yang sudah dilakukan oleh pemerintah saat ini  adalah dengan melakukan pengumpulan sampah disetiap rumah kemudian dilanjutkan dengan proses pengangkutan ke landfill atau disebut Tempat Pembuangan Akhir (TPA). Pengangkutan sampah hanya berkisar dari 60-70% yang dapat diangkut ke TPA sisanya tercecer begitu saja di lingkungan sekitar perumahan penduduk. Selumit Pantai adalah salah satu Kelurahan tepatnya di Tarakan Tengah, Kota Tarakan Provinsi Kalimantan Utara yang termasuk kawasan padat penduduk mencapai 16.347 jiwa dengan luas wilayah hanya 0,48 km2 hal ini berdampak pada volume sampah yang dihasilkan dari aktivitas penduduk. Pada pengabdian ini akan dilakukan pengelolaan sampah plastik dengan pendekatan metode Ecobrick yang tidak memerlukan teknologi tinggi dan biaya. Prinsip dari metode Ecobrick adalah botol plastik diisi dengan bahan padatan berupa sampah plastik atau sampah anorganik hingga benar-benar keras dan padat yang dapat dimanfaatkan untuk pembuatan meja, kursi, tembok atau barang kesenian lainnya. Tujuan dari ecobrick adalah untuk mengurangi sampah plastik yang dapat dijadikan sebagai bahan yang berguna. Sasaran kegiatan ini adalah ibu-ibu rumah tangga di Kelurahan Selumit Pantai. Tahapan kegiatan meliputi sosialisasi sampah plastik, Pelatihan Pengelolaan Sampah Metode Ecobrick, Pendampingan pembuaatan Ecobrik, Evaluasi. Hasil pengabdian masyarakat menunjukkan ketercapaian kegiatan dalam pengelolaan sampah dengan metode Ecobrick mencapai 90%. Hal ini digambarkan dari antusiasme ibu-ibu rumah tangga yang ingin memanfaatkan sampah yang ada dilingkungan sehingga memiliki nilai guna. Ketercapaian ini juga dilihat dari pemahaman narasumber dalam memberikan materi dan pendampingan pada peserta mencapai 85%.
New Approach and Alternate Criterion for Heat-transfer Analysis of Building Walls and Its Applications
Authors: Zhang Yu , Zhang Xu
Published: February 2022

Energy consumed by buildings accounts for approximately one-third of the total energy consumption of the society. Moreover, energy systems employed in buildings emit hazardous pollutants, such as, NOx, PM2.5 and CO2, into the environment. Consequently, increasing the energy efficiency of buildings constitutes an important problem concerning the field of building-energy and environment conservation. Thermal resistance and capacitance are two important thermophysical properties of building walls significantly impacting their heat-transfer performance. Traditional theories concerning these properties, however, face certain limitations: (1) the concept of thermal resistance is only valid for one-dimensional, steady heat conduction without existence of an internal heat source; (2) thermal resistance and capacitance are relevant, and can, therefore, not be used to analyze heat-transfer and storage performance, respectively, of building walls. Based on the entransy-dissipation-based impedance theory, a new approach towards realization of heat-transfer analysis and optimization has been proposed in this study. The weightiness of thermal resistance and capacitance with regard to heat-transfer performance has been described along with deduction of the corresponding substitutional relation via illustrative examples. The proposed approach has been demonstrated to effectively overcome aforementioned limitations of building energy conservation problems.
Photon and Fast Neutron Transmission Parameters of Metakaolin Doped Concrete
Authors: Olarinoye O. I. , Idris M. M. , Kure M.
Published: February 2022

Radiation-shielding properties of metakaolin doped concrete samples wereinvestigated in this report. The gamma photon mass attenuation coefficientsand exposure buildup factor of the samples were determined theoreticallyusing WinXcom and EXABCal software respectively for the energyrange of 15 keV - 15 MeV and fast neutron removal cross section for theconcrete sample was evaluated. Results indicated that, oxides of silicon,aluminum, calcium and iron determined through the energy dispersiveX-ray fluorescence spectrometric analysis constitute more than 85% ofthe chemical composition of the concrete samples. The oxides contribute85.46, 86.47, 87.55, 88.75, and 86.15 % of the total chemical oxides inMK00, MK05, MK10, MK15, and MK20 respectively. Densities of theprepared MK doped concrete were in the range of 2.575-2.667 g/cm3 .Compressive stress of prepared MK doped concretes increased consistentlywith the curing period for each concrete sample. CS grew from 8.71 -10.63, 8.84 - 10.83, 9.44 - 11.22, 10.89 - 11.53, and 10.76 - 11.43 MPafor MK00, MK05, MK10, MK15, and MK20 respectively as the periodextends from 7 to 28 days. Mass attenuation coefficient decrease steadilywith an increase in energy up to about 0.1 MeV and the decrease becomesmaller beyond this energy with increasing energy for all the mixtures. Fastneutron removal cross section results indicate that MK10 (0.07693 cm-1)has the highest value of ΣR followed by MK15 (0.07628 cm-1) and MK20(0.07537 cm-1) while MK00 (0.07380 cm-1) and MK05 (0.07404 cm-1)have approximately the same value. It was found that MK10 concrete hasthe best gamma radiation and fast neutron shielding ability among the MKdoped concrete under study.
Analysis on Factors Causing Project Delays in Road and Highways Sector in India Using Relative Ranking Index Technique
Authors: Pai Siddesh K. , Anand Neeraj , Mittal Ankut
Published: February 2022

On-time completion of road infrastructure projects is a critical goal. Whenprojects were not completed on schedule and real construction progress isslower than expected, the inconvenience and disruption to business accessincreases. On time completion is linked to economic and social welfare,as well as safety. Construction delays continue to be a typical occurrence,despite the need of prompt completion.A literature study is conducted in this context in order to learn more aboutthe causes and factors that contribute to delays. Following a thoroughreview of the literature, it was determined that a questionnaire survey isthe most effective and trustworthy way for gathering information about thecauses and quantifying delays caused by emergent factors. The RelativeImportance Index (RII) method was used to analyze the data, and thereasons for the delay were prioritized according to their importance. Thisstudy focuses on the emergent concerns/causes and reasons of concernin road infrastructure projects, as well as how to priorities these issuessequentially during the planning stage. This study survey can assistconstruction companies doing business in India in understanding theessential or sensitive issues that require special attention in order to conducttheir businesses smoothly in this country while employing appropriateproject management practices.
Consequences of Direct Transfer to Fresh Water on the Blood Variables of Sarotherodon melanotheron (Rüppell, 1852)
Authors: O.A Akinrotimi , U Okenwa , N.A Ani , C. A Onwujiariri
Published: February 2022

Alterations in blood variables of Sarotherodon melanotheron transmitted immediately from brackish water (salinity 13.71‰) to fresh water (salinity 0.12‰) were examined to evaluate the consequence of abrupt alterations in the environment on fish blood parameters. The results acquired revealed that significant reduction (p < 0.05) in mean values of Haemoglobin (Hb) from 7.37±1.22 to 4.30±0.82dl-1; Packed Cell Volume (PCV) 23.48±3.22 to 15.08±2.97%; Red Blood Cell (RBC) 5.99±0.72 to 3.31±0.77 Cells x106 ; Mean Corpuscular Haemoglobin Concentration (MCHC) 31.68±3.66 to 28.48±2.03 pg; and Platelets (PLT) 195.44±16.77 to 138.99±9.05 103 uL-1. However, notable elevation was recorded in the values of Erythrocyte Sedimentation Rate (ESR) from 4.89±0.16 to 10.58±1.48 mm/ hr; White Blood Cell (WBC) 27.03±2.96 to 33.09±3.72 x 109 L-1; Mean Corpuscular Volume (MCV) 39.33±3.07 to 45.88±7.03 fL Neutrophils (NEUT) 41.71±3.08 to 48.30±7.99%; Lymphocytes (LYMP) 54.60±3.99 to 46.36±9.87% and Monocytes (MON) 3.80±1.04 to 5.97±1.99%. These variations in the blood parameters were more perceptible in adult than juvenile fish. Results from this study consequently imply that direct transfer of fish to a region of lower salinity may have damaging effect on the physiology of S. melanotheron as observed in this study.
Microbiological and Proximate Evaluation of Knife Clam (Tagelus Adansonii, Bosc, 1801) from Okoro River, Eastern Obolo, Nigeria.
Authors: Udo Imefon , Udoh Dora , Isang Otobong
Published: February 2022

Tagelus adansonii has served as man’s food around the world from time immemorial. However, the aquatic ecosystem in which they live is constantly polluted. Microbial and proximate compositions and energy value of T. adansonii were evaluated as indices for food safety and biomarker of pollution. Standard microbiological techniques and standard methods of AOAC were employed. Results showed that Bacillus substilis, Micrococcus sp, Proteus sp, Klebsiella sp, Staphylococcus aureus, Vibrio cholerea, Vibrio parahaemolyticus, Enterobacter sp, Escherichia coli, Bacillus cereus, and Chromatium sp were the probable bacteria while Rhizopus stolonifer, Aspergillus niger, Penicillium sp. Candida tropicalis, Fusarium sp. and Aspergillus flavus were the probable fungi isolated from the sample. Total Heterotrophic Bacterial Count (THBC), TVC, TCC, TSC and TFC in fresh sample were 2.01±0.14 x 105, 2.77±0.27x10, 2.79±0.81x10, 6.08±0.21x102, and 2.08±0.21x104 cfu g-1 respectively and concentrated mostly in the gut. The mean crude protein, moisture, carbohydrate, ash, lipid and crude fibre contents of the soft tissues were 60.92±2.38, 40.75±1.85, 26.58±2.91, 5.99±0.43, 5.56±0.51 and 4.13±0.10% respectively while the energy or caloric value was 397.65±11.97. Proper monitoring and surveillance should be adopted by Government to check pollution of the aquatic environments and proper processing should be adopted before consumption for good public health.