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Liana Liana
JURUSAN TEKNIK KIMIA FAKULTAS TEKNOLOGI INDUSTRI UNIVERSITAS KATOLIK PARAHYANGAN
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Pengaruh Suku Bunga Sbi Dan Kurs Dollar Terhadap Harga Saham Di BEI Achmad, Noor; Liana, Liana
Jurnal Ilmiah Ranggagading (JIR) Vol 12, No 2 (2012): Jurnal Ilmiah Ranggagading
Publisher : Sekolah Tinggi Ilmu Ekonomi Kesatuan

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Abstract

SBI interest rate is yield of investment in the form of Sertifikat Bank Indonesia (SBI) which is determined by Bank Indonesia. Dollar exchange rate is relative price of Dollar against Rupiah. Certificates of Bank Indonesia as free risk investment instrument and Dollar exchange rate are consideration factors before investing in stock market in the form of shares so that stock prices will be influenced by those two variables. This study used the monthly data of SBI Interest Rates and semimonthly Dollar Exchange Rates and they are officially recorded in Bank Indonesia. The monthly closing price of IHSG was used as stock price data. This study used data of 2006 – 2010 and was processed by utilizing SPSS 17.0. From this study it can be concluded that SBI interest rate has strong correlation, has negative and significant influence, on stock prices. SBI interest rate has weak correlation, has negatif but not significant influence, on Dollar exchange rate. From the study of other factors that affect Dollar exchange rate, it can be found out that Dollar exchange rate is significantly affected by the balance of payments. Dollar exchange rate has moderate correlation, has negativeand significant influence, towards stock prices. SBI interest rate and Dollar exchange rate simultaneously have strong correlation, have negative and significant influence, towards stock prices.
IDENTIFIKASI MORFOLOGI FUNGI MIKORIZA ARBUSKULA (FMA) PADA BERBAGAI JENIS TANAMAN HORTIKULTURA DI LAHAN PERTANIAN DESA NUPABOMBA Liana, Liana; Patadungan, Yosep Soge; Widjajanto, Danang
AGROTEKBIS Vol 6, No 5 (2018)
Publisher : AGROTEKBIS

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Abstract

The research aimed at identifying the morphology of mycorrhizal arbuscular fungi (MAF) on the root zones of different horticultural crops (peppers, potato, leek, cabbage, tomato and chicory) in Nupabomba village Tanatovea sub district of Donggala.  It was descriptive exploratory study and conducted from October to December 2015. Samples of soil were purposively taken around the root zone and analyzed for its chemical and physical characteristics as well as for mycorrhizae  spore isolation and its identification.  The research results showed that the highest spore number of 303 spores per 10 g was found in the leek plantation whereas the lowest number of 43 spores per 10 g in the potatoes plantation.  There are four types of spore genus i.e. Acaulaspora, Entrophospora, Glomus and Paraglomu.  The Glomus genus was the dominant spores found in all types of the horticultural plantations.
Antioxidant and Anti-Hyaluronidase Activities of Dragon Fruit Peel Extract and Kaempferol-3-O-Rutinoside Liana, Liana; Rizal, Rizal; Widowati, Wahyu; Fioni, Fioni; Akbar, Khainir; Fachrial, Edy; Lister, I Nyoman Ehrich
Jurnal Kedokteran Brawijaya Vol 30, No 4 (2019)
Publisher : Fakultas Kedokteran Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (172.286 KB) | DOI: 10.21776/ub.jkb.2019.030.04.3

Abstract

Aging is a natural process in human life and is triggered by the presence of free radicals (ROS). The use of antioxidants from natural ingredients is one of the breakthroughs to overcome aging and counteract the harmful effects caused by the free radicals. This study aimed to determine and compare the antioxidant activity of H2O2 scavenging and hyaluronidase inhibition of red dragon fruit peel extract (DFPE) and kaempferol-3-o-rutinoside (KOR) compounds. Dragon fruit peel extract (DFPE) is obtained through extraction by maceration method using 70% ethanol solvent. The design of this study included antioxidant and anti-aging activity assay of EKBN and KOR at the series concentration of 15.63; 31.25; 62.50; 125; 250; 500 µg/mL through H2O2 scavenging, as well as the DFPE and KOR hyaluronidase inhibition assay at the series concentration of 5.21; 10.42; 20.83; 41.7; 83.33; 166.67 µg/mL. EKBN shows that the average activity of H2O2 scavenging is lower than KOR. In addition, the IC50 values of KOR for H2O2 scavenging is lower (351.46±2.30ug/mL) than DFPE (409.64±23.17ug/mL). While, KOR also has higher values of inhibitory activity than of the DFPE. However, the IC50 value of KOR for hyaluronidase inhibition activity was 84.07±10.46µg/mL, equivalent to the IC50 value of DFPE (85.32±10.24µg/mL). The presence of antioxidant and anti-aging activity in the EKBN is probably caused by betalain and the KOR compound itself contained in red dragon fruit. The results of the paired-samples T-test on antioxidant activity and anti-aging of DFPE and KOR showed non-significant difference. Thus, DFPE has an equivalent antioxidant and anti-aging through H2O2 scavenging and hyaluronidase activity as possessed by the KOR compound.
Kebiasaan Makanan Ikan Gabus (Channa Striata) di Perairan Rawa Aopa Watumohai, Desa Pewutaa Kecamatan Angata Kabupaten Konawe Selatan Liana, Liana
Jurnal Manajemen Sumber Daya Perairan Vol 5, No 3 (2020): Agustus 2020
Publisher : Jurnal Manajemen Sumber Daya Perairan

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Abstract

Ikan gabus (channa striata) merupakan jenis fauna yang hidup pada perairan tawar. Ikan ini  mampu bertahan hidup selama musim kemarau dengan menggali lumpur pada danau, kanal dan rawa. Penelitian ini bertujuan untuk menganalisis kebiasaan makanan ikan gabus (C. striata) pada bulan januari-maret 2018 bertempat di perairan Rawa Aopa Aopa Watumohai Desa Pewutaa Kecamatan Angata Kabupaten Konawe Selatan. Pengamatan sampel ikan dilaksanakan di Laboratorium Pengujian, Fakultas Perikanan dan Ilmu Kelautan, Universitas Halu Oleo Kendari, Provinsi Sulawesi Tenggara. Berdasarkan hasil penelitian terhadap indeks bagian terbesar pada lambung ikan gabus yang di tangkap menunjukkan bahwa indeks bagian terbesar yang ditemukan dalam  isi lambung ikan gabus adalah jenis makanan  ikan (62,39%) hal ini berarti ikan merupakan makanan utama pada ikan gabus. Selanjutnya didapatkan cacing (6,53%), Keong (2,27%) dan  serasah (5,50%) merupakan makanan pelengkap pada ikan gabus. Sedangkan MTT (23,31%). Tinggi mtt dan serasah yang diperoleh dalam lambung ikan gabus memungkinkan dalam keadaan memakan  mangsanya ikan gabus sempat memakan dedaunan.Kata kunci : Kebiasaan Makan, Ikan Gabus, Rawa Aopa
Antioxidant Face Cream Formulation of Ethanol Extract from Soursop leaves (Annona muricata L) Putriana Rahman, Alief; Liana, Liana; H, Syaifiyatul
Berkala Ilmiah Kimia Farmasi Vol. 9 No. 1 (2022): June
Publisher : Universitas Airlangga

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20473/bikfar.v9i1.40889

Abstract

Face cream was a treatment cream used to treat facial skin. One of the natural plant ingredients that could be used as an active substance in cream preparations was soursop leaves (Annona muricata L.), which had antioxidant activity. The purpose of this study was to formulate cream preparations from soursop leaf ethanol extract and test the antioxidant activity on face cream preparations. Soursop leaves were extracted by maceration using a 96% ethanol solvent. Cream preparations in physical quality evaluation included organoleptic test, pH test, homogeneity test, viscosity test, spread power test, sticking power test, centrifugation test, and determination of emulsion type and antioxidant activity test with DPPH method, measured at a wavelength of 511,5 nm using UV-Vis spectrophotometry. The results of this study produced a face cream preparation of soursop leaf ethanol extract with differences in color in organoleptic cream preparations. pH tests of FI, FII, and FIII creams had an average yield of 6,0-6,6. The homogeneity tests of FI, FII, and FIII showed homogeneous results. The viscosity test had a value of 49950 cPs. The FI, FII, and FIII spread power tests had good results with an average of 5,2-5,7 cm. FI, FII, and FIII sticking power tests had an average value of 26,5-46,5 seconds. FI, FII, and FIII centrifugation tests were physically stable, and the determination of the type of cream emulsion was type M/A. Testing the antioxidant activity of facial cream with ethanol extract of soursop leaves in FI with a concentration of 3% showed an IC50 value of 80,64 ppm, FII with a concentration of 5% showed an IC50 value of 46,06 ppm, and FIII with a concentration of 7% showed an IC50 value of 10,91 ppm. Based on the results of the study, it could be concluded that the preparation of facial cream with ethanol extract of soursop leaves in FI, FII, and FIII met the physical stability requirements based on organoleptic test parameters, pH test, homogeneity test, viscosity test, spread power test, sticking power test, centrifugation test, and determination of emulsion type. FI cream preparations had an IC50 value of 80,64 ppm, indicating strong antioxidant activity, FII had an IC50 value of 46.06 ppm, indicating very strong antioxidant activity, and FIII had an IC50 value of 10,91 ppm, indicating very strong antioxidant activity.Keywords: Cream, Formulation, Antioxidant, Ekstrak, Soursop Leaves
Desain Pengembangan Model Bela Banathy terhadap Pembelajaran Terpadu Pelajaran Bahasa Indonesia Liana, Liana; Silitonga, Immanuel
Jurnal Basicedu Vol. 5 No. 5 (2021)
Publisher : Universitas Pahlawan Tuanku Tambusai

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31004/basicedu.v5i6.1523

Abstract

Penelitian ini bertujuan untuk melihat desain  pengembangan model bela banathy terhadap pembelajaran terpadu pelajaran bahasa Indonesia berbasis  literasi digital di SD kecamatan Medan Kota. Jenis penelitian in adalah penelitian pengembangan (Research and Development) dengan metode deskriptif kuantitatif dan kualitatif. dapun tujuan dari pelaksanaan penelitian ini adalah untuk mengembangkan desain model Bela banathy terhadap pembelajaran terpadu pada pelajaran Bahasa Indonesia berbasis literasi digital di SD Kecamatan Medan Kota. Pada penelitian ini menggunakan analisis data dengan menggunakan validitas terhadap model Bela Banathy dengan melihat beberapa aspek yaitu validitas analisa deskriptif kualitatif dan kuantitaif yang diperoelh validasi sebesar 90, 60% pada aspek tampilan, sedangkan pada aspek validitas pada operasional sebesar 96, 53dan validitas pada aspek 95,37. Data yang diperoleh tersebut dapat dikembangkan pada model Bela Banathy diaktegorikan sangat baik dan layak dalam pendukung desain analisis
Pengembangan E-Book Berbasis Problem Based Learning Pada Pelajaran Bahasa Jawa Kelas IV Sekolah Dasar Liana, Liana; Wiryokusumo, Iskandar; Leksono, Ibut Priono
Jurnal Inovasi dan Teknologi Pembelajaran Vol 8, No 3 (2021)
Publisher : Universitas Negeri Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.17977/um031v8i32021p289

Abstract

Abstrak: Penelitian ini bertujuan untuk menghasilkan e-book Bahasa Jawa berbasis Problem Based Learning yang sesuai dengan karakteristik siswa kelas IV yang termasuk generasi Z. Generasi berjuluk generasi intenet ini mustahil menjalani kehidupan tanpa teknologi. Kemajuan teknologi akibat revolusi industri yang terus berkembang menghasilkan tantangan masa depan bagi siswa. Berpikir kritis untuk memecahkan masalah adalah salah satu jalan keluar yang perlu dibiasakan. Oleh karena itu dibutuhkan bahan ajar yang sesuai, yaitu e-book berbasis Problem Based Learning. Penelitian ini adalah penelitian Research and Development (R&D) dengan model pengembangan Dick & Carey. Hasil validasi dari ahli materi terhadap e-book mencapai 92,36% (sangat layak). Hasil ahli desain mencapai 91,67% (sangat layak). Hasil ahli media mencapai 96% (sangat layak). Hasil review guru mencapai 94,22% (sangat layak). Hasil uji coba kelompok kecil mencapai 85,21% (sangat layak) dan hasil uji coba lapangan mencapai 90,51% (sangat layak). Dari hasil data dan analisis penelitian, disimpulkan bahwa pengembangan e-book Bahasa Jawa berbasis Problem Based Learning bagi generasi Z yang membiasakan siswa berpikir kritis berkategori sangat layak dan dapat diterapkan guru dalam pembelajaran.Abstract: This research aims to produce a Javanese e-book based on Problem Based Learning that is suitable for the characteristics of fourth grade students, including Z generation. This generation nicknamed the internet generation is impossible to live without technology. Technological advances due to the industrial revolution that continues to develop produce future challenges for students. Critical thinking to solve problems is one way out that needs to be accustomed. Therefore, appropriate teaching materials are needed, namely e-book based on Problem Based Learning. This research is a Research and Development (R&D) with Dick & Carey development model. The validation results from material experts on e-books reached 91.67% (very feasible). Media expert results reached 96% (very feasible). The result of the teacher’s review reached 94.22% (very feasible). The results of the small group evaluation reached 85.21% (very feasible). From the results of data and research analysis, it was concluded that the development of a Javanese e-book based on Problem Based Learning for Z generation which familiarizes students to think critically is catagorized as very feasible and can be applied by teachers in learning.
Suplementasi Tepung Ubi Jalar Kuning (Ipomoea batatas L) Sebagai Prebiotik Dalam Pakan Terhadap Kesehatan Ikan Lele Sangkuriang (Clarias gariepinus) Liana, Liana; Agustina, Agustina; Kusdianto, Heru
Jurnal Akuakultur Sungai dan Danau Vol 9, No 1 (2024): April
Publisher : Universitas Batangahari Jambi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33087/akuakultur.v9i1.204

Abstract

Feeding management is a very important factor in fish farming activities. Adding prebiotics to feed is an effort to increase the availability of nutrients in feed and fish health. This study aimed to determine the effect of sweet potato flour in feed on hematological parameters and nutritional coefficient values of sangkuriang catfish. This study used a completely randomized design (CRD) with 4 treatments 3 repetitions with the dose of each treatment, namely treatment 1 (0% sweet potato flour in feed), treatment 2 (1% sweet potato flour in feed), treatment 3 (2% sweet potato flour in feed), and treatment 4 (3% sweet potato flour in feed). Maintenance is carried out in a plastic container with a volume of 25 liters of water for 30 days. Feeding according to treatment was carried out three times a day in the morning, afternoon and evening using the at satiation method. The results showed that the provision of sweet potato flour in feed could increase the hematological parameters and nutritional coefficient values and gave the best value at P3 for the hemoglobin level parameter, namely 8.40; hematocrit level with a value of 79.01%; total leukocytes with a value of 75.23 × 103 cells/mm3 and total erythrocytes with a value of 2.89 × 106 cells/mm3 . In the nutritional coefficient value parameter, the best results are found in P3 with a total of 0.82. 
Hybrid Cryptosystem Analysis RSA Algorithm And Triple DES Algorithm Liana, Liana; Zarlis, Muhammad; Tulus, Tulus
Sinkron : jurnal dan penelitian teknik informatika Vol. 7 No. 3 (2023): Article Research Volume 7 Issue 3, July 2023
Publisher : Politeknik Ganesha Medan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33395/sinkron.v8i3.12467

Abstract

Data security is needed in terms of communication. To guarantee data security, a technique is needed to make data and information called Critography. This study aims to analyze the process of Super Encryption in symmetric and asymmetric criterias using the Triple DES Algorithm and the RSA Algorithm. This can improve data security so that data is more confidential. The method used in Triple DES which is also called the symmetric algorithm is the OFB (Output feeback) method, and the RSA Algorithm (Riverst - Shamir-Adleman) which is an asymmetric algorithm using a random number system so that when these two algorithms are combined in the Super Encryption process the more accurate the data security. Super DES Triple Encryption and RSA algorithm analysis shows that the data created by text will be encrypted into ciphertext using both methods and re-described, so that the security of the data is relatively safe. Super Encryption on the two methods Algorithm is done because the level of complexity is difficult to make Cryptanalysts to steal data and the Encryption process becomes slow but data security becomes safer and not easy to attack Cryptanalysts. The problem in this research is how to increase encryption security and speed up the encryption process by combining the RSA and Triple DES methods.
Kemampuan Pemahaman Konsep Siswa dengan Pembelajaran Guided Discovery Learning Ramananda, Putri Cantika; Arifin, Sujinal; Liana, Liana
SJME (Supremum Journal of Mathematics Education) Vol 8 No 1 (2024): Supremum Journal of Mahematics Education
Publisher : Fakultas Keguruan dan Ilmu Pendidikan Universitas Singaperbangsa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35706/sjme.v8i1.10081

Abstract

The aim of this research is to describe students' ability to understand concepts using the guided discovery learning model in learning statistics material. The method used in this research is quasi-experimental with a one-shot case study design. The data collection technique used consisted of a test of the ability to understand mathematical concepts in the form of a description of 7 test questions and interviews. The ability to understand concepts can be seen from the analysis of students' answers to test questions given to 28 students whose research subjects were class VIII students at SMP Negeri 46 Palembang. From the results of this test, interviews were then conducted with 4 students who received ability scores in three categories of low, medium and high. The results of this research show that more than 20 students have met the indicators of ability to understand concepts with an average answer of 80% -93% with an average score of "83.88", a very good assessment criterion.
Co-Authors Abu Umayah Agustina Alief Putriana Rahman Ana Ngainurohmah Anis Windofiroh Aritonang, Riwando Arsi, Arsi Aunurrahman Aunurrahman Baiq Ahda Razula Apriyeni Bambang Gunawan Barus , Dwita Dasya Br Berman Hutahaean Danang Widjajanto Edy Fachrial Effendy, Suapri Fatmawati, Risdiana Andika Febriani, Bella Fioni, Fioni fitri pratiwi, fitri Gita Rahmawati, Gita Rahmawati Gultom, Candra Ronitua H, Syaifiyatul Hadi, Hasrul Haratua Tiur Maria Silitonga Hasibuan, Asnita Herman Supriadi Hidayat, M. Adnan Hidayat, Muh Adrian Juniarta Iskandar Wiryokusumo Karisma Erikson Tarigan Karolina, Venny Khainir Akbar, Khainir Kusdianto, Heru Kusumawati, Mira wahyu Leksono, Ibut Priono Lister, I Nyoman Ehrich Maibang, Elisabet Manik , Wira Maria Maria Muhammad Zarlis, Muhammad Nababan, Evi lasrohana Najib, Nardy Noerman Nikita Amelia Noor Achmad Novhela, Shelly Nuraini, Debora Olivia, Maria Anggie Pangaribuan, Jontra Jusat Patadungan, Yosep Soge Pinem, Irmina Pitra, Pitra Putri, Onis Sumaryani Ramananda, Putri Cantika Rizal Rizal Rizki Achmad Darajatun Sada, Novi Herman Sagala , Sinta Afryanti Sari , Sopiah Maya Selwen, Selwen Sidabutar, Yuni Rosmasari Silitonga, Immanuel SIMANJUNTAK, DAIRI SAPTA RINDU Simbolon, Sanjelita Fransiska Sinulingga, Rosiana Pepayosa Br Siti Nur Asmah Srida Mitra Ayu Sujinal Arifin Syamsiah, Resti Ikhda Tamba, Losten Tarigan , Alexsa Febiola Br Tarigan, Dhini Filisia Br Teguh Firmansyah Tulus Tulus urai salam WAHYU WIDOWATI Warneri . Winarno Winarno Witno Witno Wongso, Wongso Yahman, Dr. Yahman Yumna Yumna, Yumna Zahir, M Ibrahim Zaki Mubarok, Zaki