Lalu Rudyat Telly Savalas

• Doctor of Philosophy
• Researcher at University of Mataram

Penelitian ini bertujuan untuk mengidentifikasi kesulitan belajar siswa pada pembelajaran kimia kelas XI MIPA di MAN 2 Mataram. Penelitian ini adalah penelitian deskriptif dengan pendekatan kualitatif. Populasi penelitian ini sebanyak 285 siswa yang terbagi menjadi 8 kelas. Sedangkan jumlah sampel sebanyak 74 siswa diambil secara Simple Random Samp...

Penelitian ini bertujuan untuk mengetahui bagaimana pengaruh lingkungan pondok pesantren terhadap hasil belajar kimia siswa di MA NW Narmada. Jenis penelitian ini yaitu kualitatif dengan analisis kuantitatif. Populasi dalam penelitian ini adalah siswa kelas XII MA NW Narmada yang terdiri dari 105 siswa. Pengambilan sampel dilakukan dengan teknik ra...

Lipases are in high demand in food processing for various purposes, such as modifying food texture, aromatic development, and enhancing emulsifier properties. Plant-based lipases present an alternative to microbial lipases, offering advantages such as ease of preparation and purification and consequently lower production costs. This article describ...

Penelitian ini merupakan penelitian pengembangan (Research and Development) dengan desain penelitian model 4D (define, design, develop, and disseminate). Penelitian ini bertujuan untuk mengetahui: (1) Proses pengembangan modul praktikum kimia bahan alam: prosedur pembuatan sabun trimiristin dari biji pala untuk mendukung pembelajaran bermakna. (2)...

Pembelajaran kimia saat ini mulai diarahkan pada penggunaan budaya sekitar dan dukungan terhadap konsep green chemistry dalam pelaksanaannya. Lombok Tengah sebagai salah satu daerah yang menjadi pusat budaya di NTB memiliki potensi untuk diintegrasikan budaya sekitar dalam proses pembelajaran kimia. Praktikum skala kecil dapat menjadi pilihan untuk...

This research was exploratory descriptive research that aimed to analyze the types of seaweed that contain flavonoid compounds and compile them into instructions for a chemical practicum of natural product in the form of booklets. The populations in this study were all seaweed species that live in Cemara Beach, Ekas Buana Beach, and Labuhan Haji Be...

The study aims to determine the effect of the flipped classroom learning model assisted by pre-class quizzes on student learning outcomes of the Faculty of Mathematics and Natural Sciences, University of Mataram, in the subject of biochemistry, on fatty acid metabolism. The type of experimental research used in this study was a Quasi-Experimental D...

This study aims to identify the chemical concepts contained in the process of making coconut oil, then the results of the identification and documentation are compiled into a chemistry magazine for senior high schools. The process of making coconut oil is done by two methods, namely heating/traditional and fermentation. The preparation of a chemica...

The purpose of this study was to investigate the factors that influence junior high school students in choosing a high school based on gender differences. The literature review was used to identify relevant factors to be incorporated into the survey instrument design. Questionnaires were administered via the Google form link, and information was co...

Lipases are versatile enzymes with high specificity toward lipid substrate. They have many industrial applications, such as in food, pharmacy, and green fuel. So far, most explored lipases are from microbial and animal sources, whereas those from plants are less studied. The present study aims to characterize ketapang (Terminalia catappa Linn) lipa...

Theoretical studies have been carried out using DFT, ab initio MP2 and Monte Carlo (MC) simulations of corrosion inhibitors from lawsone derivatives against carbon steel. The research focuses on studying the effect of substituent groups in the lawsone structure on the efficiency of corrosion inhibition in mild steel. Quantum chemical parameters of...

Penelitian ini bertujuan untuk mengetahui tingkat praktikalitas modul praktikum kimia kelas XI MIA SMAN 1 Lingsar yang dikembangkan. Jenis penelitian yang digunakan adalah penelitian dan pengembangan dengan menggunakan rancangan penelitian dari model pengembangan Thiagarajan yang terdiri dari 4 tahap pengembangan atau yang biasa disebut dengan mode...

Penelitian ini bertujuan untuk menganalisis aktivitas belajar daring mahasiswa pada mata kuliah kimia inti dan radiasi sebagai upaya belajar dari rumah di tengah pandemi Covid-19. Penelitian ini merupakan jenis penelitian deskriptif kualitatif. Responden penelitian merupakan mahasiswa semester VII Program Studi Pendidikan Kimia Universitas Mataram....

Penyelenggaraan seminar ilmiah internasional merupakan kegiatan yang kompleks dan membutuhkan persiapan dan pengetahuan yang matang. Tuntutan kinerja dosen dan peneliti baik dari universitas maupun lembaga penelitian merupakan sasaran potensial suatu seminar ilmiah, karena keikutsertaan dalam seminar merupakan salah satu bukti kinerja penelitian. T...

This study aims to analyze students’ critical thinking skills and examine the relationship with self-regulated learning (SRL) in online learning. The research sample was active chemistry students with a total of 85 people consisting of 3 age groups, namely freshmen (N = 30), sophomore (N = 33), and junior (N = 22). Critical thinking indicators anal...

This study aims to determine the validity, practicality, and effectiveness of the newly developed computational chemistry-based laboratory work module. The developed laboratory work module is applied to test lawsone’s efficacy and its derivatives as a sensitizer in dye-sensitized solar cells DSSC. The Design and Development D&D research model is us...

In general, lipase enzymes are used in the form of free lipase enzymes which can only be used once and are less effective, so that their use is costly. Therefore, to maximize the use of the lipase enzyme, immobilization of the enzyme that allows multiple use is a choice. The purpose of this study was to determine the activity of the candlenut (Aleu...

Tujuan dari studi ini adalah untuk mengidentifikasi kesulitan mahasiswa program studi Magister Pendidikan IPA Universitas Mataram dalam menyelesaikan tugas akhir (tesis). Pengambilan data penelitian survei ini menggunakan metode angket untuk para alumni program studi di samping kajian dokumen program studi dan pedoman wawancara untuk focused group...

Laboratory gives contribution for students as place to conduct experiment activity which is part of learning process. This study was aimed to analyze the components that supporting experiment activity in fundamental chemistry II experiment class. Four indicators which used in this research are language of the fundamental chemistry II experiment mod...

In this study, a structured-students-assignment has been employed to toincrease students learning experiences in food chemistry course. Population were 15students undertaking food chemistry course of which only one male student. In thefirst half semester, students experienced classical lectures of food chemistry, such aschemistry of lipids, antioxi...

Proyek pengabdian kepada masyarakat bertema chemistry slam telah dilakukan. Chemistry slam adalah versi kimia dari Science Slam yang populeritasnya semakin meningkat. Peserta kegiatan ini adalah mahasiswa tingkat sarjana dan tidak terbatas pada mahasiswa kimia atau pendidikan kimia. Dalam kegiatan chemistry slam, peserta diminta untuk menelusuri li...

Pembelajaran kimia yang lengkap adalah pembelajaran yang menghubungkan tiga level representasi kimia, yaitu level makroskopik, simbolik, dan submikroskopik. Dengan pembelajaran berbasis multi level representasi, mahasiswa dapat menjelaskan konsep kimia secara ilmiah tanpa ada miskonsepsi. Program ini bertujuan untuk mensosialisasikan dan mendamping...

Kemampuan dasar pemrograman dirasakan semakin penting dalam era yang berubah sangat cepat ini. Penguasaan bahasa pemrograman tidak hanya penting bagi pegiat ilmu informatika dan teknologi komputer, tetapi juga menjadi esensial bagi mahasiswa sains, pendidikan sains dan calon guru sains. Untuk itu, telah dilakukan kegiatan pengabdian kepada masyarak...

Ubiquitous in nature, lipases represent an example of enzymes with high versatility. Plant seeds are potential sources of lipase, and they are attracting more attention for specific purposes. In this study, coconut lipase was isolated from germinating coconut seed. Biochemical characterization of coconut lipase was undertaken to reveal its substrat...

The present study aims to investigate the potential inhibitory effect of eicosenoic fatty acids on protein tyrosine phosphatase B of Mycobacterium tuberculosis (PtpB). PtpB is recognized to play a vital role in Mycobacterium tuberculosis (Mtb) successful latent infection. It prevents the fusion even between phagocytosed mycobacteria with lysosomes...

Pembelajaran kimia yang lengkap menuntut mahasiswa untuk memahami materi kimia dengan menghubungkan tiga level representasi, yaitu representasi makroskopik, simbolik, dan submikroskopik. Kemampuan menghubungkan ketiga level representasi tersebut disebut dengan model mental. Model mental terdiri atas model mental saintifik, sintetik, dan inisial. Da...

Pembelajaran kimia yang lengkap menuntut mahasiswa untuk memahami materi kimia dengan menghubungkan tiga level representasi, yaitu representasi makroskopik, simbolik, dan submikroskopik. Kemampuan menghubungkan ketiga level representasi tersebut disebut dengan model mental. Model mental terdiri atas model mental saintifik, sintetik, dan inisial. Da...

Chemical analysis has been undertaken to investigate the nutrients compositions and the presence of residual pesticides from rice cultivated from converted-to-organic paddy fields in Lombok Island. The nutrients being investigated were macronutrients (carbohydrates, fat, and proteins), micronutrients (beta-carotene), metal ions, and minerals, where...

Artikel ini membahas tentang pemanfaatan hasil pengembangan modul kimia dengan pendekatan etnosains pada materi kimia SMA. Pemanfaatan hasil ini dilakukan di MAN 2 Lombok Tengah. Pemilihan sampel dilakukan dengan teknik purposive sampling. Pemanfaatan hasil pengembangan ini termasuk penelitian deskriptif dengan pendekatan kuantitatif, melibatkan pe...

This study aims to obtain a valid chemistry learning device based on ethnoscience emphasizing character values and conservation behaviors. This study refers to the 4D model from Tiahgrajan, S. Semmel & Semmel which was modified into three stages, namely define, design, and develop. The chemistry learning kit that has been validated by three experts...

This study aims to produce a valid and practical ethnoscience-based chemical module by raising salt farmers' habits. This study refers to the 4D model from Tiahgrajan, S. Semmel & Semmel, which was modified into three stages: defining, designing, and developing. Chemistry modules are tested for validity and practicality before it is used in chemist...

Performance tests on caffeine’s corrosion inhibition properties and their derivatives against copper corrosion have been previously reported experimentally using gravimetric and electrochemical analyses. The test was able to measure the efficiency of their corrosion inhibition accurately. However, the caffeine and its derivatives’ structure pattern...

Abstrak:Telah dilakukan kegiatan pendampingan bagi peserta didik kelas VI di SD Negeri 38 Ampenan pada pelajaran IPA, meliputi pemantapan konsep dengan mengulas kembali konsep dasar materi bunyi,cahaya, listrik dan magnet; latihan soal; percobaan mengenai sifat-sifat cahaya, rangkaian listrik dan demonstrasi cara membuat magnet. Tujuan dari kegiata...

Small protein tyrosine phosphatase (PtpA) of Mycobacterium tuberculosis is attributed to the development of latent tuberculosis infection, and hence bocomes an interesting target for drug development. In this communication, inhibition of PtpA by naturally occurring fatty acids cis-2 and trans-2-eicosenoic acid is investigated. Mtb PtpA was heterolo...

Penelitian ini merupakan penelitian Research and Development yang bertujuan untuk mengetahui: (1) Langkah-langkah proses pengembangan modul praktikum kimia bahan alam tentang isolasi senyawa dari minyak kayu manis. (2) Tingkat kelayakan serta kepraktisan modul praktikum kimia bahan alam tentang isolasi senyawa dari minyak kayu manis yang sudah dike...

Penelitian ini bertujuan untuk mengetahui: (1) ada atau tidaknya hubungan pemanfaatan fasilitas belajar dengan hasil belajar kimia siswa kelas XI IPA SMA Negeri 3 Mataram (2) ada atau tidaknya hubungan kemandirian belajar dengan hasil belajar kimia siswa kelas XI IPA SMA Negeri 3 Mataram; (3) ada atau tidaknya hubungan pemanfaatan fasilitas belajar...

Kegiatan pengabdian ini bertujuan untuk Meningkatkan Motivasi Siswa SMA Masuk Program Studi Pendidikan Kimia FKIP Unram melalui pendekatan pengenalan Praktikum Kimia Sederhana. Kegiatan ini dilaksanakan di SMAN 1 Pringgarata. Melalui kegiatan ini diharapkan anggapan siswa pada mata pelajaran kimia yang termasuk pelajaran yang sulit, membosankan, me...

The efficiency of ethyl-p-methoxycinnamate(EPE) and its derivatives as corrosion inhibitors of iron in acid environment has been studied to find the relationship between molecular structure and electronic parameters with their efficiency of corrosion inhibition. The ab initio MP2 perturbation theory and DFT method were applied to calculate molecula...

The objective of this community service activity was to increase the understanding and ability of the students of Master of Science Education University of Mataram to develop learning outcomes instruments based on higher-order thinking skills. This activity was carried out with several methods, namely lectures, questions and answers, brief exercise...

Penelitian ini bertujuan untuk menghasilkan perangkat pembelajaran kimia yang berorientasipenemuanuntuk meningkatkanliterasi sainspeserta didik yang layak, praktis dan efektif. Jenis penelitian ini adalah Research and development dengan mengadaptasi pengembangan perangkat modelempat-D dari Taigrajan, S. Semmel dan Semmel yang terdiri dari empat tah...

This research aims to know the effectiveness of lycopene antibacterial, through knowing bending zone lycopene towards salmonella thypi. This research has been success to isolate lycopene through extraction process used reflux method at 60oC temperature, using chloroform and methanol as antisolvent. Lycopene extract got 5,12 mg/100 g, analysis of fu...

This research was conducted to determine the quality of antidiabetic traditional medicines from beans and bitter melon after 6 months of storage. Beans and bitter melon contain bioactive compounds such as flavonoids, beta sitosterol, stigmasterol, alkaloids, saponins, and phenols which function as antidiabatic. However, environmental factors such a...

The corrosion inhibition efficiency of dibenzo-diaza-15-crown-5 (N) and its heterocyclic analogs containing O, S, and P atoms were investigated by ab initio MP2 calculations in aqueous phase. Heteroatoms have a significant role in the corrosion inhibition performance of the studied systems. The geometry parameter shows that the decrease of bond len...

Has successfully carried out the synthesis of M-hexferrites with doping metal Co. using coprecipitation method in which the basic material used in this study is BaCO3, FeCl3.6H2O, and CoCl2 (Pa) in the form of powder with a purity of 99.99% by mole fraction 0, 0 , 2, 0.5, 0.8 and 1. BaCO3 dissolved in HCl with 0.1 N. The process of dissolving BaCO3...

The binding selectivity of 18-membered azacrown ethers (monoaza- N1, diaza- N2, triaza- N3, tetraaza- N4, pentaaza- N5, and hexaaza-18-crown-6 N6) with Ca2+, Sr2+, Ba2+ have been studied by density functional theory (DFT) calculations. The complex binding selectivity was analyzed in term of interaction energies, thermodynamic properties, second ord...

p class="IsiAbstrakIndo"> The present study aims at expressing and partially purifying PtpB in active form. To achieve this, Mtb PtpB gene has been cloned into pET30a vector and overexpressed in Escherichia coli BL 21(DE3) under IPTG induction in the form of an inclusion body. Following resolubilization by urea and dialysis, the resulted PtpB has b...

Abstrak. Penelitian ini bertujuan untuk mengisolasi senyawa sinamaldehid dengan menggunakan kromatografi kolom. Penelitian dilakukan di kantor Senyawa Standar Indonesia. Batang kering tanaman kayu manis (Cinnamomum burmanii) telah diekstraksi dengan menggunakan pelarut dichlorometane. Fraksinasi ekstrak DCM menggunakan kromatografi kolom dengan per...

This research has made for identification derivate compound of fractionation derivate compound of fractionation root bark Artocarpus ododratissimus. Root bark A. dodoratissimus has macerated by methanol. Fractionation by using Vacuum Liquid Choromatography with eluen variation from nonpolar till polar (n-hexane 100%; n-hexane:ethyl acetate 9:1 till...

Program pengembangan praktikum kimia berbasis kimia komputasi untuk Sekolah Menengah Atas telah dilaksanakan pada kelompok kerja guru kimia mitra (SMAN 1 Narmada dan SMAN 2 Narmada) di Kabuaten Lombok Barat, Indonesia. Kegiatan dilaksanakan dengan dengan mengadopsi langkah-langkah penelitian tindakan yang terdiri dari empat tahapan, yaitu: perencan...

Laboratory course gives contribution to students as a place to conduct experiment activity which is part of learning process. This study was aimed to analyze the components that supporting experiment activity in fundamental chemistry II experiment class. Four indicators analyzed in this research were the language use in the fundamental chemistry II...

Abstrak: Penelitian ini bertujuan untuk: 1) menghasilkan multimedia interaktif sistem koloid yang layak diterapkan di sekolah, dan menguji keefektifan multimedia interaktif tersebut dengan: 2) mengetahui apakah penguasaan konsep siswa yang menggunakan multimedia interaktif berbasis kontekstual lebih baik daripada penguasaan konsep siswa yang tidak...

Abstrak: Penelitian ini bertujuan untuk mengetahui hubungan: (a) iklim kelas dengan prestasi belajar siswa; (b) sikap siswa terhadap pelajaran kimia dengan prestasi belajar siswa; (c)iklim kelas dan sikap siswa secara bersama dengan prestasi belajar siswa. Populasi dalam penelitian ini seluruh siswa kelas XI IPA SMA Negeri se-Kota Mataram yang berj...

Increased cholesterol levels in humans are one of the risk factors associated with coronary heart disease. Several studies in vitro and in vivo indicates that a particular strain of lactic acid bacteria have the ability to assimilate cholesterol. The aim of this study was to determine the ability of lactic acid bacteria from buffalo milk in assimil...

DIRC2 (Disrupted in renal carcinoma 2) has been initially identified as a breakpoint-spanning gene in a chromosomal translocation putatively associated with the development of renal cancer. The DIRC2 protein belongs to the MFS (major facilitator superfamily) and has been previously detected by organellar proteomics as a tentative constituent of lys...

Protein disulfide isomerase (PDI) catalyzes thiol oxidation, reduction and isomerization of disulphide bond of cell surface and secreted proteins. Yeast PDI1 consists of two catalytic domains (a and a') which are separated by two non-catalytic domains (b and b'), and a x region linked the b' and a domains. The b' domain is important for the non-cov...