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Jurnal Penelitian Sains

jps
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Published by Universitas Sriwijaya

ISSN : 14107058 EISSN : 25977059 DOI : 10.26554

Core Subject : Science, Education,

Chemistry Mathematics Physics

Jurnal Penelitian Sains (JPS) MIPA UNSRI merupakan wahana komunikasi ilmiah di bidang sains serta lintas ilmu yang terkait; diterbitkan sejak 1 Oktober 1996 oleh UP2M FMIPA Universitas Sriwijaya. Jurnal ini berisikan tulisan atau karangan ilmiah dalam berbagai bidang tersebut yang diangkat dari hasil penelitian, survei, atau telaah pustaka, yang belum pernah dipublikasikan dalam terbitan lain.

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Articles 743 Documents

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Efek Teratogenik Ekstrak Etanol Daun Sirsak (Annona muricata L) Terhadap Fetus Tikus Putih Galur Wistar Erjon Erjon; Jouliyano Dwiputri; Sari Meisyayati
Jurnal Penelitian Sains Vol 21, No 2 (2019)
Publisher : Faculty of Mathtmatics and Natural Sciences

Ethanolic extract of leaves of “sirsak” (Annona muricata L) has been proven to be effective in convulsant, inflammatory, hiperuresemia, hyperglycemia and hypertension to patients. The aim of this study was to evaluated teratogenicity effect of ethanolic extract of leaves of sirsak (Annona muricata L) leaves in Wistar rats. Ethanolic extract of leaves of “sirsak” were administered orally at dose level of 98 mg/kgbw, 196 mg/kg bw , 392 mg/kgbw on day eighth to eighteenth of gestation. At day 20th of gestation, laparoctomy was performed to retrieve the fetuses. Evaluation was done towards the fetus skeletal, organ and fetal weight. The at all doses did not cause any fetus resorption, did not cause malformation in organ and skeleton but cause fetus growth failure. Ethanolic extract of leaves of sirsak at doses of 98, 196, and 392 mg/kgbw in rats did not have the teratogenic effect.

Uji Fisis dan Mekanik pada Desain Struktur Keramik Forsterite (Mg2SiO4) dengan Teknik Sintering (Solid State-Reaction) Jorena Jorena; Hadir Kaban; Ahmad Aminuddin Bama
Jurnal Penelitian Sains Vol 20, No 1 (2018)
Publisher : Faculty of Mathtmatics and Natural Sciences

Telah dilakukan penelitian tentang sintesis, uji fisis dan mekanik keramik forsterite dengan metode sol-id state reaction (sintering). Keramik forsterite disintesis dengan menggunakan powder silika dan magnesium oksida sintetik. Selanjutnya silika dan magnesium powder dicampur dan digerus hingga halus. Ke dalam cam-puran tersebut ditambah etanol dan ditirrer dengan magnetik stirrer agar menjadi homogen, dan dikalsinasi pada suhu 110oC hingga membentuk bubuk/serbuk. Selanjutnya serbuk digerus kembali dengan mortar dan pastel untuk menghasilkan serbuk forsterite. Serbuk dicetak menjadi pelet silinder dan kemudian disintering dengan suhu yang berbeda yaitu 850, 950 dan 1050oC. Selanjutnya dilakukan pengukuran/uji porositas, densi-tas dan konduktivitas, hardness/kekerasan dan fracture toughness/keretakan.Hasil pengukuran menunjukkan bahwa densitas meningkat dengan seiring dengan kenaikan suhu sintering, sebaliknya porositas dan fracture toughness menurun dengan meningkatnya suhu sintering. Hasil analisis frac-ture toughness dengan SEM menunjukkan bahwa keretakan pada suhu sintering 850oC lebih besar dibanding-kan dengan sampel yang disintering pada suhu 950 dan 1050oC. Dengan kata lain, tingkat keretakan pada sampel yang disintering pada 850oC lebih besar dibandingkan dengan sampel yang disintering pada suhu 950 dan 1050oC. Fenomena ini menunjukkan bahwa butiran-butiran semakin besar disertai jumlah pori yang se-makin sedikit. Kekerasan meningkat seiring dengan kenaikan suhu sintering. Semakin tinggi suhu sintering, semakin tinggi kekerasan yang sesuai dengan meningkatnya densitas, serta diikuti menurunnya porositas. Pen-gukuran konduktivitas menunjukkan bahwa semakin tinggi suhu sintering, konduktivitas semakin kecil yang se-suai dengan meningkatnya densitas dan menurunnya porositas. Berdasarkan karakteristik perubahan konduk-tivitas, keramik forsterite yang diperoleh dalam penelitian ini mendekati sifat isolator sehingga dapat diaplikasi-kan sebagai bahan isolator listrik.

Uji Stabilitas Sensor DT-Sense Color Untuk Mendeteksi Warna dan Sensor MQ137 Untuk Mendeteksi Gas Ammonia Berbasis Mikrokontroler Fereddy Yulianus Napitupulu; Fauziyah Fauziyah; Heron Surbakti
Jurnal Penelitian Sains Vol 21, No 1 (2019)
Publisher : Faculty of Mathtmatics and Natural Sciences

This study has conduct with origami color paper and ammonia gas to test the stability that serves to DT-Sense color sensors and MQ137 ammonia gas sensors. Method of this study is experimental laboratory scale. DT-Sense color sensor placed on material origami color paper test and measurement of three repetitions and then compared the results obtained against the database default provisions. The results of the RGB color by using origami color paper compared with the data base color like a hot pink, black, yellow, red, orange, green liner, royal blue, dark green and brown saddle with stability range digital tools 0-255 number. Measurement of liquid ammonia evaporation with a content of 25% with a different sample preparation. Measurements were performed for 250 seconds (s). Based on the observations of the ammonia concentration value detected by the sensor MQ137 related with the sensor voltage which is R = 0.9996 and stability of concentration of ammonia and ADC values have a related with R = 1. Based on observations sensr MQ137 which has been designed only able to detection of ammonia concentration of +/- 1300 ppm and MQ137 sensor voltage with +/- 5 volts.

Menentukan Hisab Awal Bulan Hijriyah 1436 H dengan Metode Ephemeris Septi Sari; Agus Purwanto; Akhmad Aminuddin Bama
Jurnal Penelitian Sains Vol 19, No 3 (2017)
Publisher : Faculty of Mathtmatics and Natural Sciences

Telah dilakukan penelitian/perhitungan yang terkait dengan penentuan hisab awal bulan Hijriyah dengan Me-tode Ephemeris. Dalam penelitian/perhitungan ini digunakan data peredaran matahari dan data peredaran bulan tahun 2015 untuk menentukan hisab awal bulan hijriyah selama satu tahun.Berdasarkan perhitungan yang dilakukan diperoleh bahwa awal bulan secara berurutan jatuh pada Muhar-ram: 25 Oktober 2014 (WH dan IR), Shafar: 24 November 2014 (WH dan IR), Rabiul Awal: 23 Desember 2014 (WH dan IR), Rabiul Akhir: 22 Januari 2015 (WH dan IR), Jumadil Ula: 21 Februari 2015(WH) dan 22 Februa-ri 2015 (IR), Jumadil Tsani: 22 Maret 2015 (WH dan IR), Rajab: 20 April 2015 (WH dan IR), Syaban: 19 Mei 2015 (WH dan IR), Ramadhan: 18 Juni 2015 (WH dan IR), Syawal: 17 Juli 2015 (WH dan IR), Dzulqaidah: 16 Agustus 2015 (WH dan IR), 14 September 2015 (WH) dan 15 September 2015 (IR).

Dinamika Komunitas Fitoplankton Pada Siang dan Malam Hari di Perairan Desa Sungsang Muara Sungai Musi, Sumatera Selatan Fery Pratama; Rozirwan Rozirwan; Riris Aryawati
Jurnal Penelitian Sains Vol 21, No 2 (2019)
Publisher : Faculty of Mathtmatics and Natural Sciences

The Sungsang waters are often used by the surrounding community for water transportation, fishing and wash. The correlation of phytoplankton community with the physical-chemical parameters that can be used to determine the condition of the waters. The purpose of this research was to discuss the types of phytoplankton, analyze the community index and correlation between physical - chemical parameters in Sungsang waters. The research was had been done on November 2018, taking of samples and measurements was performed at 3 station points by tides at the day and night in 3 days. Taking of sampels that is phytoplankton and nutrient water samples, measurements of physical - chemical parameters that is DO, temperature, salinity, pH and current velocity, the correlation of phytoplankton community's with physical-chemical parameters are carried out by principal component analysis (PCA). The phytoplankton composition at night was found 39 genera from 4 classes, while during the day there were 41 genera from 5 classes. Percentage of phytoplankton composition class that is Bacillariophyceae (98.77%), Cyanophyceae (0.87%), Dinophyceae (0.29%), Chlorophyceae (0.055%) and Dictyochophyceae (0.014%). The abundance of phytoplankton is range between 298 - 2,533 cells/l with the diversity index of the dominant is medium category, the uniformity index of the dominant is high category and the dominance index of the dominant is low category. Based on the results of PCA for the correlation between phytoplankton communities with physical-chemical parameters during at day with the identifiers is uniformity index, DO, dominance index, phosphate, salinity and current, the identifiers at night is current, pH, nitrate, temperature, phosphate, DO, diversity index and uniformity index, for combined data day and night the identifiers is diversity index, phosphate, uniformity index, abundance, temperature, pH, dominance index and salinity.

Isolasi Dan Identifikasi Jamur Simbion Pada Karang Lunak Sinularia polydactyla Di Perairan Pulau Tegal Dengan Menggunakan Media Yang Berbeda Reftika Ramona Putri; Rozirwan Rozirwan; Fitri Agustriani
Jurnal Penelitian Sains Vol 21, No 1 (2019)
Publisher : Faculty of Mathtmatics and Natural Sciences

Soft coral is a marine animal that does not have a spine that lives in shallow water. Soft corals are able to interact with microorganisms such as fungi. Symbiotic fungi from the sea are microbes that are rich in bioactive natural products and secondary metabolites. The purpose of this study was to isolate and identify symbiotic fungi with isolated soft corals from the Sinularia polydactyla type and determine the type of media that produced the most symbiotic fungi in the Sinularia polydactyla soft coral. The research method in isolating fungal symbionts was carried out using the Direct Planting method. This study uses 3 media including PDA (Potato Dexktrose Agart), HDA (Host Dekxtrose Agart), and MEA (Malt Extract Agart). The results of this study showed that symbiotic fungi with Sinularia polydactyla soft coral were isolated in 7 isolates, with 3 isolates identified as Aspergillus flavus, 2 isolates identified as Penicillium sp., and 2 isolates identified as Aspergillus niger. The media that produced the most symbiotic mushrooms were PDA media, where 7 isolates were found, there were 3 isolates that grew on PDA media, 2 isolates on MEA media, and 2 other isolates on HDA media.

Analisis Perubahan Luasan dan Kerapatan Mangrove Menggunakan Data Citra Satelit Spot di Pesisir Teluk Pandan Kabupaten Pesawaran Provinsi Lampung Andy Irawan; Isnaini Isnaini; Andi Agussalim
Jurnal Penelitian Sains Vol 21, No 1 (2019)
Publisher : Faculty of Mathtmatics and Natural Sciences

Monitoring of mangrove forests periodically is important to know the change of area coverage and the mangroves condition in the Teluk Pandan coastal of Pesawaran District of Lampung Province. This research aims to analyze changes of mangrove area and density in 2010 – 2015, to analyze the mangroves condition also the correlation between mangrove density from the satellite image with the mangroves density from the field and its accuration level in mangrove of Teluk Pandan coastal. This research was conducted in September 2015 – March 2016 using satellite image SPOT 4 in 2010 and SPOT 6 in 2015. This research used supervised method with a ground check that has high accuration. The results showed that there was an increasing of mangroves density and also mangrove area coverage around 9 ha. The condition of mangroves in the coastal of Teluk Pandan categorized as good condition and Rhizophora apiculata was the dominant species with the highest IVI (Important Value Index). The correlation between NDVI (Normalized Difference Vegetation Index) values with the density of mangroves in the field has a high relationship with a R2 value of 0.9177. The accuration level of the image classification was 88.88% indicated the good accuracion level of the spatial distribution of mangroves.

Identifikasi dan Evaluasi Kawasan Ruang Terbuka Hijau (RTH) Berdasarkan Kondisi Sifat Tanah di Wilayah Kota Palembang Provinsi Sumatera Selatan Linda Utami; Satria Jaya Priatna; Dadang Hikmah Purnama
Jurnal Penelitian Sains Vol 19, No 3 (2017)
Publisher : Faculty of Mathtmatics and Natural Sciences

Kota Palembang merupakan salah satu kota yang mengalami perkembangan pesat dalam pembangu-nan dan menjadi pusat aktivitas manusia sehingga menyebabkan adanya ketidakseimbangan antara demand dan supply lahan dan adanya perluasan kota ke daerah pinggirannya sehingga mengurangi ruang terbuka hi-jau (RTH). Berdasarkan Undang-Undang Nomor 26 Tahun 2007 tentang Tata Ruang, bahwa setiap Kota dan Kabupaten yang ada di Indonesia memiliki RTH minimal 30% dari luas kota. RTH memiliki banyak fungsi, salah satunya sebagai pengendali pencemaran dan kerusakan tanah. Pada penelitian ini akan dilakukan identifikasi dan evaluasi kondisi eksisting sifat tanah (fisik dan kimia) pada kawasan rencana pengembangan RTH yang akan difungsikan sebagai taman kota dan taman pemakaman umum (TPU) di Kota Palembang dan keterkai-tannya dengan tanaman (vegetasi) yang sesuai untuk lokasi tersebut. Penelitian ini dilakukan pada Bulan Mei sampai dengan Agustus 2017, dengan menggunakan metode survey deskriptif, dan metode pengambilan sampel dilakukan secara sample survey method detail. Kondisi sifat tanah kawasan rencana pengembangan RTH taman kota lapangan hatta secara fisika dan kimia yaitu nilai rata-rata kedalaman efektif ±100 cm terge-nang, tekstur tanah lempung berliat, permeabilitas tanah 2,09 cm/jam (sedang), pH tanah 6,17 (mendekati ne-tral), N-total 0,18% (rendah), C/N tanah 9,03 (rendah), P2O5 tanah 7,42 ppm (rendah), K2O 106,81 ppm (san-gat tinggi), dan c-organik 1,77% (rendah). Jenis vegetasi yang sesuai berupa rumput jepang (Zoysia japonica), rumput gajah mini (Pennisetum purpureum schamach), pohon palm raja (Roystonea regia), bunga sepatu (Hi-biscus rosa sinensi L.), pohon angsana (Pterocarpus indicus Wild.), dan pohon akasia (Acacia auriculiformis). Sedangkan untuk kondisi sifat tanah kawasan rencana pengembangan RTH taman pemakaman umum (TPU) Borang Sako secara fisika dan kimia yaitu nilai rata-rata kedalaman efektif ±50cm tergenang, tekstur tanah lempung, permeabilitas tanah 1,53 cm/jam (agak lambat), pH tanah 3,46 (sangat masam), N-total 0,19% (ren-dah), C/N tanah 16,66 (tinggi), P2O5 tanah 6,55 ppm (sangat rendah), K2O 60,80 ppm (sangat tinggi), dan c-organik 2,97% (sedang). Jenis vegetasi yang sesuai yaitu Bougenvil (Bougenvilia sp), kamboja putih (Plumeria alba), Tanjung (Mimosups elengi), Dadap (Erythrina varigata), Kembang Merak (Caesalpinia pulcherrima) dan sebagainya.

Pengendalian Persediaan Obat Di Pt. Pratapa Nirmala Palembang dengan Metode Heuristik Silver Meal (HSM) Yuni Kartika; Evi Yuliza Yuliza; Fitri Maya Puspita
Jurnal Penelitian Sains Vol 21, No 2 (2019)
Publisher : Faculty of Mathtmatics and Natural Sciences

Drug demand data is a top priority for a company in the process of ordering. In meeting consumer needs a plan is needed in the process of ordering drugs so that there is no vacancy and also the distribution process does not stop. This study determine the results of drug inventory control orders and find out the total cost of ordering optimal drugs by applying the Heuristic Silver Meal (HSM) method. The total cost of ordering a drug before applying the HSM method is Rp. 29,016,000, while after applying the HSM method it produces a total booking fee of Rp. 20,800,632. Thus the results of the calculation of the method HSM are known to produce optimal ordering costs. This means that the company saves on ordering costs of Rp. 8,215,368, so the HSM method can be used to calculate the cost of ordering drugs at PT. Pratapa Nirmala Palembang.

Struktur Komunitas dan Kelimpahan Fitoplankton serta Keterkaitannya dangan Paramater Fisik Kimia di Perairan Pesisir Banyuasin Kabupaten Banyuasin Ridwan Arazi; Isnaini Isnaini; Fauziyah Fauziyah
Jurnal Penelitian Sains Vol 21, No 1 (2019)
Publisher : Faculty of Mathtmatics and Natural Sciences

Changes in water quality is closely related to the abundance and phytoplankton community structure so that the presence of phytoplankton in the waters can provide information about the condition of a body of water. The purpose of this study was to evaluate the physical and chemical parameters of coastal Banyuasin, analyze the abundance and community stucture of phytoplankton abundance of phytoplankton and analyzing linkages with physico-chemical associations with chemical physics parameters in the coastal waters of South Sumatera Banyuasin was held on June 15, 2015. The determination of the research station using purposive sampling method. Phytoplankton samples taken using plankton nets (Plankton net) with a mesh size of 25 μm. Identification of phytoplankton are carried out in the laboratory by observing under a microscope and using phytoplankton identification book. The influence of enviromental parameters on the abundance of phytoplankton processed by PCA using STATISTICA software. The result showed that the phytoplankton were found composed of there classes which Bacillariophyceae, Dinophyceae and Cyanophyceae. The most common genus is Skeletonema. Value abundance of phytoplankton ranged from 78 cells/1-329 cells/1, Diversity Index (H’) ranged from 0,377 to 1,785, Index Uniformity (E) ranges from 0,234 to 0,772, and the index Dominance (C) ranges between 0214-0851. Principal Component Analysis of phytoplankton abundance correlated positively with nitrate (NO3+), salinity and pH, whreas phospate (PO4+), DO, temparature, brightness and speed of flow showed a negative correlation.

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Hadi

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Home Page

OAI Link

Editorial Team

Contact

Reviewer

Google Scholar

Contact Name Hadi

Contact Email jpsmipaunsri@mipa.unsri.ac.id

Phone +6282374210479

Journal Mail Official jpsmipaunsri@mipa.unsri.ac.id

Editorial Address Fakultas Matematika dan Ilmu Pengetahuan Alam Jl. Palembang-Prabumulih Km. 32 Inderalaya Ogan Ilir

Location Kab. ogan ilir, Sumatera selatan INDONESIA

Abstract

Abstract

Abstract

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Abstract

Contact Name
Hadi

Contact Email
jpsmipaunsri@mipa.unsri.ac.id

Phone
+6282374210479

Journal Mail Official
jpsmipaunsri@mipa.unsri.ac.id

Editorial Address
Fakultas Matematika dan Ilmu Pengetahuan Alam Jl. Palembang-Prabumulih Km. 32 Inderalaya Ogan Ilir

Location
Kab. ogan ilir,

Sumatera selatan

INDONESIA