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All Journal Jurnal Riset Kimia Alotrop Jurnal Pendidikan dan Ilmu Kimia GERVASI: Jurnal Pengabdian kepada Masyarakat Human Care Journal Hydrogen: Jurnal Kependidikan Kimia TRIBUTE: JOURNAL OF COMMUNITY SERVICES Andromeda: Jurnal Pengabdian Masyarakat Rafflesia
Nurhamidah
Universitas Bengkulu
Humanities Chemistry Education Health Professions Immunology & microbiology Languange, Linguistic, Communication & Media Mathematics Medicine & Pharmacology Nursing Public Health Social Sciences Other

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UJI AKTIVITAS ASAP CAIR CANGKANG BUAH KARET (Hevea brassiliensis) DAN APLIKASINYA DALAM PENGHAMBATAN KETENGIKAN DAGING SAPI Haulia Dwi Putri; Sumpono Sumpono; Nurhamidah Nurhamidah
ALOTROP Vol 2, No 2 (2018)
Publisher : University of Bengkulu

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33369/atp.v2i2.7474

Abstract

This research was aimed to know the degree of Fenol compound, total acid and the activity of liquid smoke of Rubber (Hevea brassiliensis) Seed Shell also the application in obstructing the rancidity of beef. The Fenol compound was determined by using Reagen Follon-Ciocalteu. The total acid was determined by using the method of titrated acids.The ability as the antioxidant was tested by DPPH method and the ability of obstructing the rancidity of beef was done by measuring the alteration of TBA value in beef as long as saved. The result was shown the fenol compound in liquid smoke of Rubber Seed Shell as much as 0,84 % and the acetic acid content was 4.725%. The antioxidant test was produced IC50 value as much as 101.27 ppm. According to the IC50 value which got from the test that the liquid smoke of Rubber Seed Shell were included in moderate category. The increment of the liquid smoke of Rubber Seed Shell were able to suppress the rancidity of beef during the storage time. It was marked by the decreasing of TBA value in beef as given in treatment A1 (liquid smoke 4% ) and A2 liquid smoke 6%. The treatment without the liquid smoke (A0) increased the TBA value from 0.05 mgMDA/Kg on day (0) to 0.615 mgMDA/Kg on day 6. The treatment of concentration liquid smoke 4% (A1)  increased  from  0.039  mgMDA/Kg  on  day  (0) to  0.395  mgMDA/Kg  on  day  6.  The  treatment  of concentration liquid smoke 6% (A2) increased from 0.031 mgMDA/Kg on day 0 to 0.209 mgMDA/Kg on day 6.
PENGEMBANGAN METODE CITRA DIGITAL BERBASIS APLIKASI ANDROID UNTUK ANALISIS ION LOGAM Cr(VI) Marti Hitsmi; Mochamad Lutfi Firdaus; Nurhamidah Nurhamidah
ALOTROP Vol 4, No 2 (2020)
Publisher : University of Bengkulu

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33369/atp.v4i2.13835

Abstract

The presence of heavy metals in the environment can be a serious problem because it is harmful to human health. One of the heavy metal ions that pollute the environment is the Cr6+ metal ion. The usual tool used to analyze metal ions is Cr6+ is the Atomic Absorption Spectrometry (AAS) and Inductively Couple Plasma (ICP) which are very expensive and require trained personnel. The purpose of this study was to design a simple detector for Cr6+ metal ions as an alternative to conventional methods using AAS and ICP. The detection tool was developed using the android-based digital image method with SLR data analysis techniques obtained from the reaction of the metal ion complex Cr6 + with the compound dhypenilcarbazida (DPC). The parameters of the tool measured were accuracy, selectivity and sensitivity with the reaction of DPC compounds as complexes. The comparison level of this method is the complex method with DPC using a UV-Vis spectrophotometer. This research was carried out in the Chemistry Laboratory FKIP UNIB in November 2018 until March 2019. The implementation of tool parameters was tested to samples of aquatic environments in Bengkulu City, namely PDAM Kota Bengkulu water, tap water of FKIP UNIB Dean, Lake UNIB water, Sungai Hitam water and water Pantai Panjang. The results showed that the detection of Cr6+ metal ions made by the android-based digital image method had better accuracy, selectivity and sensitivity than conventional methods. The DPC is selective for Cr6 + metal ions with a change in color from clear to violet, at a wavelength of 540 nm. Accuracy was checked using a UV-Vis spectrophotometer with 99% accurate results. After that, test sensitivity to Cr6 + metal ions. using the android application method generates a Limit of Detection (LOD) of 6.7 ppb. The detector that was developed was applied to water samples in the city of Bengkulu, it turned out that all of the water samples showed that the levels of Cr6+ metal ions were still below the threshold determined by the Minister of Health Regulation, so it was still safe to use in everyday life.
POTENSI EKSTRAK METABOLIT SEKUNDER Eugenia uniflora L. SEBAGAI BAHAN PENGAWET TAHU Genesis Tria; Nurhamidah Nurhamidah; Hermansyah Amir
ALOTROP Vol 2, No 1 (2018)
Publisher : University of Bengkulu

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33369/atp.v2i1.4630

Abstract

[POTENTIAL OF Eugenia uniflora L SECONDARY METABOLITES EXTRACT AS A TOFU PRESERVATIVE]. The purpose of this research is to know the secondary metabolite compounds from the Eugenia uniflora L (Dewandaru) fruit extracts , as well as to measure the potential of water extract from the fruit of E. uniflora L for the use in the tofu preserve as well as measure the impact of the addition of water extract of the fruit of E. uniflora L against moisture, pH, protein on tofu. The process of preserving test against tofu on the research done by soaking time at 2, 3 and 4 hour with each variation of the concentration of extract at  10, 15 and 20% as well as the observation time at 24 and 48 hours for each treatment.The result of the test water extract of the fruit of the phytochemical profile E. uniflora L showed the content of alkaloids, flavonoids, phenolic , saponins and steroid compounds. Test results from the granting of water extract from the fruit of E.uniflora L in the preserve of tofu with the variation of concentration and soaking time is proven to affect the value of water content, pH, and protein on tofu that was tested.The results of the research done indicate that the granting of a water extract of the fruit of E.uniflora L proven useful to be used as a natural preservative for tofu at 24 hours with a 20% concentration and a soaking time at 2 and 3 hours. From the results, it can be concluded that water extracts from the fruit of E.uniflora L. potential to be used as a natural preservative for tofu.
IDENTIFIKASI PROFIL FITOKIMIA DAN UJI AKTIFITAS ANTIOKSIDAN EKSTRAK DIETIL ETER DAUN SURIAN (Toona sinensis (A.Juss) M.Roem) DENGAN METODE DPPH. Nurhamidah Nurhamidah; Hazli Nurdin; Yunazar Manjang; Abdi Dharma
ALOTROP Vol 3, No 1 (2019)
Publisher : University of Bengkulu

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33369/atp.v3i1.9040

Abstract

Surian Toona sinensis (A.Juss) M. Roem is a plant that is widely used by the community in the field of medicine such as fever, diarrhea, blood booster, tonic and others. This study aims to determine the secondary metabolite compounds found in leaf extracts of Toona sinensis and test the antioxidant activity using the 2,2-diphenyl-1- (2,4,6-trinitrophenyl) -hydrazinyl (DPPH) method. Identification of secondary metabolites by alkaloids, terpenoids, steroids, flavonoids, phenolics, saponins, coumarin and carotenoids. Toona sinensis leaf was extracted using methanol as a solvent. The resulting extract was saponified with a KOH solution in methanol. The saponification results were extracted again with diethyl ether solvent. The ether layer obtained was washed with distilled water, then dried with Na2SO4 and evaporated to dry, then tested its antioxidant activity. The identification results show Surian leaves contain all secondary metabolites except alkaloids. The antioxidant activity parameters of the Surian extract (Toona sinensis) are indicated by the% inhibitory and IC50 values. Test results showed diethyl ether extract had moderate category of antioxidant activity with IC50 122, 3752 ?g / mL
Aktivitas Antibakteri Kulit Buah Jeruk Kalamansi (Citrofortunella Microcarpa) Terhadap Bakteri Staphylococcus aureus dan Escherichia coli Amiliah Amiliah; Nurhamidah Nurhamidah; Dewi Handayani
ALOTROP Vol 5, No 1 (2021)
Publisher : University of Bengkulu

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33369/atp.v5i1.16493

Abstract

Model Pembelajaran Discovery Berbasis Blended Learning untuk Meningkatkan Aktivitas dan Hasil Belajar Kimia Mahasiswa Nurhamidah Nurhamidah; Nadia Amida; Rina Elvia
Hydrogen: Jurnal Kependidikan Kimia Vol 10, No 1 (2022): Hydrogen: Jurnal Kependidikan Kimia
Publisher : Universitas Pendidikan Mandalika Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (513.599 KB) | DOI: 10.33394/hjkk.v10i1.4884

Abstract

Indonesia is one of the countries affected by the Covid-19 outbreak, where this situation greatly affects all aspects of life, including the field of education. The learning process is carried out online or in a network to minimize the spread of this virus, which makes learning effectiveness less than optimal, especially for material in the field of science. Selection of the right strategy and match the material is very necessary. The purpose of this study was to see the activities and learning outcomes of students using a blended learning-based discovery model on the subject of the Basic Laws of Chemistry. This research is a classroom action research conducted in two cycles. The research subjects were 26 students of the Biology Education Study Program in the first semester of the 2021/2022 class. The research data were obtained through observation sheets and cognitive tests using a test instrument in the form of a posttest. Based on the data analysis, it shows that the activities and student learning outcomes have increased from 54.62% and 66.25 in the first cycle to 87.69% and 80.48 in the second cycle. The students' understanding of the learning materials has included very good criteria.
UPAYA PENCEGAHAN PEMUTUSAN MATA RANTAI PENULARAN VIRUS COVID 19 DI DESA SUKA MAKMUR BENGKULU UTARA Dewi Handayani; Nurhamidah Nurhamidah; Rina Elvia; Mantiko Parbo Maulana
TRIBUTE: JOURNAL OF COMMUNITY SERVICES Vol 1, No 1
Publisher : Universitas Bengkulu

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1797.632 KB)

Abstract

Tri Dharma perguruan tinggi mempunyai tiga poin yaitu: pendidikan dan pengajaran, penelitian dan pengembangan, pengabdian kepada masyarakat. Adapun kegiatan pengabdian kepada masyarakat ini merupakan suatu kegiatan yang dilakukan untuk memecahkan masalah yang ada dimasyarakat melalui Kuliah Kerja Nyata (KKN). Tujuan dari kegiatan ini adalah membantu warga desa Suka Makmur dalam pencegahan pemutusan mata rantai penularan virus Corona atau Covid-19. Metode yang dilakukan dalam pengabdian ini terdiri dari empat tahap. Tahap pertama, meminta izin KKN ke Desa Suka Makmur Kecamatan Giri Mulya Kabupaten Bengkulu Utara Provinsi Bengkulu. Tahap kedua, mempersiapkan seluruh hal-hal yang akan dibutuhkan dalam pelaksanaan kegiatan. Tahap ketiga, melaksanakan kegiatan sesuai dengan jadwal yang sudah dibuat dari minggu pertama sampai minggu kelima dalam proses KKN. Tahap keempat, evaluasi dengan melakukan diskusi dengan seluruh perangkat desa terkait kegiatan yang telah dilakukan sebagai upaya pencegahan covid-19 di Desa Suka Makmur. Dari hasil kegiatan pengabdian ini, ini memberikan dampak positif kepada masyarakat desa, hal ini dapat dilihat dari antusias masyarakat dan perangkat desa dalam penanaman dan pemanfaatan Tanaman Obat Keluarga (TOGA), pembuatan poster, pembuatan desinfektan dan penyemprotan desinfektan di tempat umum, pembuatan hand sanitizer dan pemberian hand sanitizer di tempat umum, serta pembagian kebutuhan pokok kepada masyarakat yang terkena dampak covid 19.EFFORTS TO PREVENT THE CHAIN BREAKING OF THE COVID 19 VIRUS IN SUKA MAKMUR VILLAGE, BENGKULU UTARA. Tri Dharma higher education has three points, namely: education and teaching, research and development, community service. This community service activity is an activity carried out to solve problems that exist in the community through student community service (KKN). The purpose of this activity is to help the villagers of Suka Makmur in preventing breaking the chain of transmission of the Corona or Covid-19 virus. The method used in this service consists of four stages. The first stage, asking for student community service (KKN) permission to the village, Giri Mulya Bengkulu Utara. The second stage, prepares all the things that will be needed in the implementation of activities. The third stage is implementation according to the schedule that has been made from the first week to the fifth week in the KKN process. The fourth stage is evaluation by conducting discussions with all village officials regarding activities that have been carried out as prevention of Covid-19 in villages. From the results of this programme, it has a positive impact on the village community, support from local society to medicinal plants (TOGA) planting and use, making posters, making disinfectants and spraying disinfectants in public places, making hand sanitizers and giving hand sanitizers in public places, and sharing basic needs to people affected by covid 19.
Aktivitas Anti Hiperurisemia Ekstrak Akar Kaik-kaik (Uncaria cordata. L. Merr) pada Mencit (Mus muscullus) yang Diinduksi Kalium Oksonat Nurhamidah Nurhamidah; Rima Fadillah; Elvinawati Elvinawati; Dewi Handayani
Jurnal Riset Kimia Vol. 13 No. 2 (2022): September
Publisher : Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/jrk.v13i2.517

Abstract

Consuming food containing high level of purin leads to increase uric acid in the blood which, in turn, cause hyperuricemia or high uric acid level. The use of improper allopurinol for hyperuricemia medication that doesn’t follow medical doctor’s prescription can give harmful side effect. It is therefore required to use an alternative safe medication. Uncaria cordata (Lour.) Merr.) is a plant often used for medication of high levels of blood uric acid by communities in Pasar Ngalam village, Bengkulu Province. This research aims to evaluate the potency of extracted compounds from Uncaria cordata (Lour.) Merr.) in reducing uric acid of Mus musculus suffering from hyperuricemia. This research is a laboratory experiment using completed random design. As many as 25 Mus musculus were divided into 5 groups of treatment: PN = normal treatment, PA = treated with allopurinol, P1 – P3 = treated with extracted compound of Uncaria cordata (Lour.) Merr.) with a dose of 5.3 mg/30gBW (P1); 10.6 mg/30gBW (P2); and 21.2 mg/30gBW (P3). In order for Mus musculus to suffer from high uric acid level, potassium oxonate-induced hyperuricemia was injected. The result showed that extracted compounds of Uncaria cordata (Lour.) Merr.) using ethanol exhibited antihyperuricemia proven by decline of uric acid level of Mus musculus from hyperuricemia on each given dose. Decreasing uric acid level for each given dose of ethanol extract (5.3 mg/30gBW, 10.6mg/30gBW and 21.2mg/30gBW) was not significant different (0.541; with a ³0.05).
UJI AKTIVITAS ANTIKOLESTEROL EKSTRAK BATANG Uncaria cordata (Lour.) Merr. TERHADAP KADAR KOLESTEROL TOTAL MENCIT JANTAN (Mus musculus) Rika Indriyani; Dewi Handayani; Nurhamidah Nurhamidah; Agus Sundaryono
ALOTROP Vol. 7 No. 1 (2023): Alotrop 2023
Publisher : University of Bengkulu

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33369/alo.v7i1.28163

Abstract

The aim of this study was to determine the anticholesterol activity of the stem extract of Uncaria cordata (Lour.) Merr. on total cholesterol levels in male mice (Mus musculus). Before carrying out the anticholesterol activity test, phytochemical tests were carried out to determine the content of secondary metabolites in Uncaria cordata stems. Furthermore, the anticholesterol activity test was carried out in vivo using male mice, male mice were induced by high-fat diet (PTL) in the form of beef brain, quail egg yolk and propylthiouracil to increase cholesterol levels in mice until they experienced hypercholesterolemia, then mice were induced by plant extracts to see anticholesterol activity. Cholesterol levels were measured using a glucometer (Autocheck). Phytochemical test results showed the content of secondary metabolites in the form of flavonoids, saponins, alkaloids, tannins and terpenoids. The results of the anti-cholesterol activity test showed that there was anti-cholesterol activity as indicated by a decrease in cholesterol levels in mice with hypercholesterolemia. A decrease of 11.45% at a dose of 5.3 mg/30grW; 12.89% at a dose of 10.2mg/30grW and 21.05% at a dose of 21.2mg/30grW. Key words : Anticholesterol, Uncaria cordata (Lour.) Merr., Hypercholesterolemia
Pengembangan e-LKPD Berbasis Problem Based Learning Pada Materi Hukum-hukum Dasar Kimia Indah Monica; Nurhamidah; elvinawati
ALOTROP Vol. 7 No. 1 (2023): Alotrop 2023
Publisher : University of Bengkulu

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33369/alo.v7i1.28231

Abstract

This study aims to determine the feasibility and response of students to the e-LKPD based on Problem Based Learning (PBL) on the materials on the basic chemical laws that were developed. The development model used is the 4-D model (Define, Design, Develop and Disseminate) which was limited to the develop-stage. The research subjects were 27 students from class XI MIPA 2 at SMA Negeri 03 Bengkulu Tengah for the 2022/2023 academic year. The research was from January to September 2022. The instruments in this study were interview sheets, observation sheet, student needs questionnaires, validation sheets and student response questionnaires. The data generated was in the form of qualitative data in the form of suggestions from the validator as well as quantitative data resulting from validation sheets and student response questionnaires. From the research results obtained (1) the Problem Based Learning-based e-LKPD developed was stated to be very feasible by material experts with a percentage of 88% where the lowest score was in the linguistic aspect, while media experts also stated it was very feasible with a percentage of 93.5% where the score the lowest is in the graphical aspect, (2) the results of student responses to the e-LKPD Problem Based Learning are in the very good category with a percentage of 84.76% where the lowest score is in the aspect of ease of understanding. The conclusion based on the results of the validation and student responses shows that the Problem Based Learning-based e-LKPD that has been developed is very feasible for use in the learning process on material basic chemical laws.
Co-Authors 1Nurul Zulhulaifah Abdi Dharma ACENG RUYANI Ade Pribadi Agus Sundaryono Amiliah Amiliah Apria Haja Krisma Budiyanto Budiyanto Chyntia Margareta Citra Utari Dewi Handayani Deza Oktasila Diah Sari Nastiti Diana Andari Ekwan Sukardi elvinawati Elvinawati Elvinawati Elvinawati Elvinawati Elvinawati Elvinawati Elvinawati Elvinawati Elvinawati Elvinawati Elvinawati Elvinawati Emilia Candrawati Febrian Solikhin Febrian Solikhin Febrian Solikhin Fikri Fadillah Azhar Genesis Tria Haulia Dwi Putri Hazli Nurdin Heriwati Heriwati Hermansyah Amir I Nyoman Candra I Nyoman Chandra Indah Monica Isna Mutaqwiyati Liis Panggabean M. Lutfi Firdaus Mantiko Parbo Maulana Marti Hitsmi Muzanip Alperi Nadia Amida Okti Mindi Safitri Oma Sepriani Raudha Isminiarti Izza Rendy Wirakrama Resmareta Rika Indriyani Rima Fadillah Rina Anjelina Rina Elvia Rina Elvia Rina Elvia Salastri Rohiat Salastri Rohiat Salastri Rohiat Salastri Rohiat Shinta Puspasari Sumpono Sumpono Tanti Anggraini Tiara Nitaria Sinaga Wiwit Wiwit Alwi Wulan Agustina Yunazar Manjang Zeta Kuntari