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Synthesis Chitosan from Squid Pens Waste Sanuddin, Mukhlis; Yulianis, Yulianis; Annisaq, Nur
ALKIMIA Vol 4 No 1 (2020): ALKIMIA
Publisher : SCIENCE AND TECHNOLOGY FACULTY OF UNIVERSITAS ISLAM NEGERI RADEN FATAH PALEMBANG

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (213.906 KB) | DOI: 10.19109/alkimia.v4i1.4627

Abstract

Squid is one of the fisheries commodities that is quite important and ranks in the third position after fish and shrimp. Still, many people don't know that these animals have bones that usually discarded when processing squid meat. Squid pens used as a source of medicinal ingredients, one of which is chitosan. Chitin was obtained by deproteination process with 3.5% (w/v) NaOH, and demineralization with 1 M HCl. Chitosan was obtained from the chitin deacetylation process using a variation of 50% (w/v) NaOH and 60% (w/v) NaOH. In this research, chitosan only produced use method 60% acetylation degree. Chitosan compounds obtained from the deacetylation process, with 60% NaOH were analyzed using FTIR spectrophotometers, received functional groups: C-H, O-H, N-H, and NH2.
Utilization of Coal-Mining Mud as a Safe and Environmentally Friendly Building Material Alam, Pocut Nurul; Yulianis, Yulianis; Hadif, Fauzil; Kurniawan, Reinaldy; Aslam, Izzan Nur
Aceh International Journal of Science and Technology Vol 13, No 1 (2024): April 2024
Publisher : Graduate School of Universitas Syiah Kuala

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.13170/aijst.13.1.37303

Abstract

Coal-mining mud is one of the wastes that must be treated before being discharged into the environment. The mud contains a lot of heavy metals which have the potential to pollute the environment and endanger human health. On the other hand, the metal contents in the mud can be used as components to strengthen building materials such as brick. In this study, an investigation was carried out to check whether the risk of heavy metal contamination in the coal-mining mud can be minimized when the brick is produced. In addition, this study also tested whether the bricks produced from the utilization of the mud were strong enough to be used as construction materials. The results obtained indicate that metal contamination can be significantly minimized through the solidification process of brick products and is following the Indonesian national quality standards. This study also shows that even though the bricks meet the strength standard for the certain purpose applied in Indonesia, the utilization of coal-mining mud mixed with cement and sand was not sufficient to produce strong bricks even though the weight obtained was quite light.
Pengaruh Kompensasi dan Beban Kerja Terhadap Kinerja Pegawai Honorer dengan Motivasi Sebagai Variabel Intervening pada Sekretariat Daerah Kota Solok Yulianis, Yulianis; Yulasmi, Yulasmi; Zefriyenni, Zefriyenni
Indo-Fintech Intellectuals: Journal of Economics and Business Vol. 4 No. 5 (2024): Indo-Fintech Intellectuals: Journal of Economics and Business (in-Press)
Publisher : Lembaga Intelektual Muda (LIM) Maluku

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.54373/ifijeb.v4i5.1856

Abstract

The background of this study is based on the phenomenon of low performance of honorary employees which is allegedly influenced by lack of compensation and unbalanced workload. This study aims to analyze the effect of compensation and workload on the performance of honorary employees with work motivation as an intervening variable in the Solok City Regional Secretariat. This study uses a quantitative method with a survey approach, where data is collected through the distribution of questionnaires to 103 honorary employees who are the research samples. The data analysis technique used is Structural Equation Modeling (SEM) to test the relationship between the research variables. The results of the study indicate that compensation has a positive and significant effect on work motivation and employee performance. In contrast, workload shows a negative influence on work motivation but is not significant on employee performance. Additionally, work motivation is proven to be a significant intervening variable in mediating the effect of compensation on the performance of honorary employees. This study implies that increasing compensation can enhance employee motivation and performance, while excessive workload may decrease work motivation
Quercetin Bioavailability Evaluation on Standardized Herbal Medicine Containing Guava Leaf Extract with HPLC Yulion, Rizky; Yulianis, Yulianis; Suntri, Suntri
Biology, Medicine, & Natural Product Chemistry Vol 12, No 2 (2023)
Publisher : Sunan Kalijaga State Islamic University & Society for Indonesian Biodiversity

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14421/biomedich.2023.122.593-599

Abstract

Standardized herbal medicines are classified as one of Indonesia's natural medicine ingredients in addition to herbal medicine and phytopharmaceuticals. The safety and efficacy of standardized herbal medicines are scientifically proven through preclinical trials, and raw materials and products have been standardized. One includes standardized herbal medicines is diapet, psidii, lelap, fitolac, and glucogarp. To determine the bioavailability of standardized herbal products containing guava leaf extract (Psidium guajava L.). which uses single and combined natural materials. The method used is experimental with a crossover design. Blood samples are taken from the marginalis vein of the rabbit ear at 0.5 hours; 1; 2; 4; and 6. The level of quercetin in the blood is determined by the reverse-phase HPLC method. The mobile phase used is methanol:aquabidest (59:41,v/v), stationary phase octadecyl silica (C18), flow rate 1 mL/min, UV-Vis detector 370 nm, and injection volume 20 ?L. The value of bioavailability parameters obtained in the parameters Cpmax, Tmax, and AUC of product A is 1.486454 ?g / ml; 1.4 hours and 10.2615291 ?g/ml/h, product B is 1.29224019 ?g/ml; 1.5 hours and 11.30810501 ?g/ml/hour. Based on the results of this study, it can be concluded that the bioavailability profile of the two products is not much different, so it is expected that the effects caused are the same.
Utilizing Anadara granosa Shells and PVA for Porous Hydroxyapatite Synthesis Anggresani, Lia; Nurmelinda, Nurmelinda; Yulianis, Yulianis; Lee Wah Lim
Indonesian Journal of Chemical Engineering Vol. 1 No. 2 (2023)
Publisher : Universitas Ahmad Dahlan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26555/ijce.v1i2.663

Abstract

The majority of the inorganic material that makes up teeth and bones is called hydroxyapatite (Ca10(PO4)6(OH)2), and it is produced by isolating calcium oxide (CaO) from the high calcium carbonate content of anadara granosa shells, which is over 98%. The porous HAp is the type of hydroxyapatite that can be used for bone repair. The aim of this work is to use the polymer polyvinyl alcohol to synthesis porous hydroxyapatite from anadara granosa shell. The anadara granosa powder (AGP) was furnaced for 3 hour at 800oC. CaO powder was produced. Then, the CaO powder was treated with (NH4)2HPO4 at a mol Ca/P 1.67 to obtained the HAp. Then, HAp is combined with a PVA polymer at a 10:1 ratio. Compressive strength tests, FTIR, SEM, and XRD are carried out. The compressive strength resulted for HAp and porous HAp were14.58 and 50.43 Mpa., respectively. The results indicated that PVA achieved a good compressive strength with Hydroxyapatite – Anadara granosa shell.
Literature Review of COVID-19 Antivirus Activities Bioactive Compounds and Herbal Plant Extracts Yulianis, Yulianis; Yulion Putra, Rizky; Putri Agustina, Nadiva
Jurnal KESANS : Kesehatan dan Sains Vol 2 No 12 (2023): KESANS: International Journal of Health and Science
Publisher : Rifa'Institute

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.54543/kesans.v2i12.227

Abstract

Introduction: Currently the world is being hit by a virus outbreak that causes symptoms of pneumonia, on December 31, 2019 China reported a mysterious case of pneumonia with no known cause. Objective: The purpose of this study was to look at bioactive compounds and extracts that have the potential as COVID-19 antivirals. Method: This research is a literature study derived from the PubMed and Science Direct databases using the Preparred Reporting Items for Systematic Reviews and Meta-analysis (PRISMA) method. Result and Discussion: In the results of the literature review, 22 articles were found that entered the inclusion criteria. The average extracts and compounds in pre-clinical data showed a very strong IC50 value with a value of <50 ug/ml, while in clinical trials, herbal plant products showed that they were anti-inflammatory and immunomodulatory. Conclusion: So, it can be concluded that natural product products from herbal plants have the potential as an antiviral for COVID-19
Peningkatan Hasil Belajar Matematika Materi Kesebangunan dan Kekongruenan melalui Model Pembelajaran Kooperatif Tipe Think Talk Write (TTW) dengan Pendekatan Scientific pada Peserta Didik Yulianis, Yulianis
Jurnal Pendidikan, Sains, Geologi, dan Geofisika (GeoScienceEd Journal) Vol. 2 No. 2 (2021): December
Publisher : Mataram University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/goescienceedu.v2i2.138

Abstract

This research aims to find out the improvement of learning outcomes through the application of the Think Talk Write (TTW) Type Cooperative Learning Model with the Scientific Approach of class IX.3 State Junior High School 9 Dumai. This type of research is a classroom action research or classroom action research (CAR) that has 4 stages (planning stage, implementation stage, observation stage and reflection stage). The research conducted with the Observer was a fellow researcher. Observations are made on teacher activities, student activities and learning outcomes carried out in two implementation cycles consisting of cycle I and Cycle II. The results of research in cycle I obtained the activities of Teachers and learners during the learning process 74% and 75% which are in the category is quite good, with the learning outcomes of learners classically for cycle I has not reached the desired success indicator which is 75%. Furthermore, in cycle II, teacher and student activities during the learning process of 90% which are in the category are very good, with the learning results of learners classically get the completion of learning 96% so that the completion of learning learners classically for cycle II has been achieved, namely ≥75%. So it can be concluded that the application of TTW cooperative learning model with a scientific approach to mathematics lessons with revival and support materials can improve student learning outcomes in class IX.3 State Junior High School 9 Dumai
Peningkatan Hasil Belajar Matematika Melalui Model Problem Based Learning (PBL) Pada Peserta Didik Kelas VIII SMP Negeri 9 Dumai Tahun Pelajaran 2021/2022 Yulianis, Yulianis
Jurnal Pendidikan, Sains, Geologi, dan Geofisika (GeoScienceEd Journal) Vol. 4 No. 1 (2023): June
Publisher : Mataram University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/goescienceed.v4i1.220

Abstract

This study aims to improve the mathematics learning outcomes of class VIII students of SMP Negeri 9 Dumai for the 2021/2022 academic year, especially circle material through the PBL model. This research uses the research method used in this research is the Classroom Action Research method. with the Kemmis and Mc. spiral model design. Data analysis in this study was carried out in a simple quantitative (statistical) manner. Quantitative analysis emphasizes the implementation of actions. The implementation of data analysis took place during the action process. The results of the research based on the cycle that had been carried out showed an increase in students' understanding of the learning material after using the PBL model as well as student learning outcomes before the PBL model was applied, which was classified as low, marked by a classical completeness percentage of 34.48%, then increased after the PBL model was applied in cycle I of 72.41% and cycle II of 89.66%. So it can be concluded that there is an increase in students' understanding of learning material after using the PBL model
Identification of Volatile Compounds in Lemon, Local Lemon and Lime Peel Extract Using Gas Chromatography – Mass Spectrometer Ihsan Pratama, Muhammad; Yulianis, Yulianis; Sanuddin, Mukhlis
Media Farmasi: Jurnal Ilmu Farmasi Vol. 22 No. 2 (2025): September 2025
Publisher : Universitas Ahmad Dahlan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12928/mf.v22i2.19749

Abstract

Orange peel is one of the main sources of essential oil. Lemon orange can also be found in an area of Jambi City, commonly referred to as local lemon, but the shape and characteristics differ slightly from common lemons. The identification results of local lemon peels indicate that these oranges are a cross between lemons and limes (Citrus medica × Citrus aurantifolia). This study aims to analyze and determine the differences in the components of the peels of lemon, local lemon, and lime using gas chromatography–mass spectrometer (GC-MS). The contribution of this research lies in providing scientific data on the chemical composition of local lemon peels, which have not been widely studied, thereby offering potential applications for the development of natural products, essential oil industries, and local biodiversity utilization. This research was conducted by extracting the peels from lemons, local lemons, and limes using acetone as a solvent. The extracts were then analyzed for their components using GC-MS. The GC-MS analysis of acetone extracts from lemon, local lemon, and lime peels revealed 19 compounds in each sample. Four compounds were found to be common across all three samples, namely 2-pentanone, 4-hydroxy-4-methyl; β-bisabolene; bis (2-ethylhexyl) phthalate; and 2H-1-Benzopyran-2-one, 5,7-dimethoxy. Meanwhile, 15 other compounds showed different contents, indicating that the hybrid nature of local lemons influenced their chemical composition. These findings highlight the unique characteristics of local lemon peels and their potential as a valuable source of bioactive compounds.
Analisis Kepatuhan Pengambilan Ulang Obat Antihipertensi pada Pasien Program Rujuk Balik di Puskesmas X Kota Jambi Dewi, Rasmala; Yulianis, Yulianis; Isman, Sindi Nurisa
Jurnal Akademika Baiturrahim Jambi Vol. 13 No. 2 (2024): September
Publisher : Universitas Baiturrahim

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36565/jab.v13i2.897

Abstract

Hypertension is also called the silent killer characterized by continuously high blood pressure in the ratio of systolic blood pressure (TDS) ≥ 140 mmHg and diastolic blood pressure (TDD) ≥ 90 mmHg. This hypertension requires long-term treatment, therefore patient non-compliance in therapy can cause failure of hypertension treatment. To determine the level of patient compliance in hypertension treatment, it can be seen from the compliance of drug retrieval by analyzing the relationship to gender, age, and comorbidities. This research method is carried out non-experimentally and uses analytical descriptive methods. Data collection from the poly registration book for patients with the July 2023 reverse referral program which will be measured 6 times from July - December 2023 obtaining patients with a population of 411 patients and a sample of 218 patients. The results showed that women suffered more from hypertension (62.8%), the most age of hypertension ≥60 years (78.4%), and patients suffered from hypertension without comorbidities (60.6%). The most commonly used hypertension treatment was monotherapy (56.9%). The level of compliance of hypertensive patients in the referral program was high in the category of re-taking antihypertensive drugs (67.4%). The results of the analysis stated that there was a relationship between gender and age on compliance with taking antihypertensive medication. The conclusion of this study is that the level of compliance is included in the high category, and there is a relationship between gender and age on compliance with re-taking antihypertensive drugs.