cover
Article Per Year (5 Year)
All
Home Page
OAI Link
Editorial Team
Contact
Reviewer
Google Scholar
Contact Name
widhadi awp
Contact Email
widhadi.awp@unipasby.ac.id
Phone
+6285736033463
Journal Mail Official
stigma@unipasby.ac.id
Editorial Address
Jl. Dukuh Menanggal XII, Surabaya 60234 Jawa Timur, Indonesia
Location
Kota surabaya,
Jawa timur
INDONESIA
Stigma : Jurnal Matematika dan Ilmu Pengetahuan Alam Unipa
Published by Universitas PGRI Adi Buana Surabaya
ISSN : 14121840     EISSN : 26219093     DOI : https://doi.org/10.36456/stigma.15.01
Core Subject : Education,
Mathematics
Jurnal STIGMA adalah jurnal ilmiah Biologi dan Biologi Terapan yang memuat artikel-artikel ilmiah. Jurnal STIGMA diterbitkan oleh Program Studi Biologi-Fakultas Matematika dan Ilmu Pengetahuan Alam - Universitas PGRI Adi Buana Surabaya. Terbit dua kali dalam satu tahun (April-Juli dan September-Desember), Jurnal ini memfasilitasi penelitian dengan tema Biologi Umum, Biologi Terapan, Bioteknologi, Aplikasi Ilmu Biologi.
Arjuna Subject : Umum - Umum
Articles 170 Documents
 12   13   14   15   16 
Peran Kulit Nanas Sebagai Bioaktivator Dan Penambahan Biochar Tempurung Kelapa Dalam Meningkatkan Hasil Produksi Tanaman Kedelai (Glycine max (L) Merrill) Andini Lutfiah; Purity Sabila Ajiningrum
STIGMA: Jurnal Matematika dan Ilmu Pengetahuan Alam Unipa Vol 13 No 02 (2020)
Publisher : Universitas PGRI Adi Buana Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

The low soybean production is caused by many limiting factors, including low soil fertility. This is influenced by the use of chemical fertilizers which is a trend among farmers. Therefore, to overcome the above problems is to utilize pineapple peel waste as a bio-activator and the addition of coconut shell biochar as a medium. This study aims to determine the effect of various concentrations of bioactivator waste from pineapple peels on growth, total chlorophyll content and soybean production. The method used is an experimental method carried out at the Green House of the Faculty of Science and Technology, Universitas PGRI Adi Buana Surabaya. The design used was a factorial design (6x5) arranged in a completely randomized design (CRD) consisting of 6 treatments. Treatment 1 was negative control (0%), treatment 2 positive control (EM4), treatment 3 bioactivators 10%, treatment 4 bioactivators 20%, treatment 5 bioactivators 30%, treatment 6 bioactivators 40%. Each treatment was repeated 5 times so that 30 experimental pots were needed. The results showed a significant effect on production at a concentration of 30%. Keywords : Soybean (Gycine max (L.) Merrill), Pineapple Skin Bioactivator, Coconut Shell Biochar
PENGARUH 2,4-DICHLOROPHENOXYACETIC ACID (2,4-D) DAN BENZYL AMINO PURINE (BAP) TERHADAP INDUKSI TUNAS DARI EKSPLAN Folium DAN Petiolus communis TANAMAN DUKU (Lansium domesticum Corr.) Siti Zulaikha; Jumiani Sarianti; Miftah Amaria Wulandari; Sherina Silva; Zaky Nuron Rizky; Amin Nurokhman; Arif Yachya
STIGMA: Jurnal Matematika dan Ilmu Pengetahuan Alam Unipa Vol 15 No 02 (2022)
Publisher : Universitas PGRI Adi Buana Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36456/stigma.15.02.6270.52-59

Abstract

Duku (Lansium domesticum Corr.) is an endemic plant of Indonesia that has a distinctive taste and is beneficial in the health sector. Besides that, the demand for duku seeds is increasing, so it is proven by the rapid propagation technique on a large scale. This can be achieved through tissue culture techniques. This study aimed to determine the effect of the growth regulators 2,4-D and BAP on Folium explants and Petiolus communis explants in inducing shoots. Leaf explants and leaf stalks were initiated using WPM (Woody Plant Medium) media with 4 different combinations of concentrations of growth regulators 2,4-D and BAP consisting of 0.0 ppm (2.4-D) + 0.0 ppm (BAP); 0.2 ppm (2.4-D) + 2.0 ppm (BAP); 0.2 ppm (2.4-D) + 2.5 ppm (BAP); 0.2 ppm (2.4-D) + 3.0 ppm (BAP) -D) + 2.0 ppm (BAP) on Petiolus communis explants is the most optimal combination of growth regulators, this is indicated by the growth response of the explants, namely the formation of brownish yellow callus on the explants.
IDENTIFIKASI JENIS TUMBUHAN FAMILY ZINGIBERACEAE DI KEBUN RAYA SRIWIJAYA KABUPATEN OGAN ILIR PROVINSI SUMATERA SELATAN Hamidi Hamidi; Amin Nurokhman; Jhon Riswanda; Ummi Hiras Habisukan; Khalida Ulfa; Arif Yachya; Sri Maryani
STIGMA: Jurnal Matematika dan Ilmu Pengetahuan Alam Unipa Vol 15 No 02 (2022)
Publisher : Universitas PGRI Adi Buana Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36456/stigma.15.02.6273.60-66

Abstract

Zingiberaceae is a family of spice plants that are commonly found in the Sriwijaya Botanical Gardens, this type of plant is often used as medicine, cooking spices, ornamental plants and hair medicine. Families of Zingiberaceae are still not well identified. This study aims to determine the species of the Zingiberaceae families in the Sriwijaya Botanical Gardens. This research uses descriptive qualitative research and uses the method of exploring the location in the Kebun Raya Sriwijaya. The identification results obtained six species of plant species from the Zingiberaceae family, namely galangal: Alpinia galanga (L.) Wild., yellow turmeric: Curcuma longa L., kencur: Kaempferia galanga L., white turmeric: Curcuma zeodaria (Christem.) Roscoe., ginger white : Zingiber officinale var. amrum., and forest galangal : Alpinia malaccensis.
Uji Kandungan Antioksidan dan Flavonoid Pada Ekstrak Daun Tanaman Mahoni (Swietenia mahagoni) Mita Julia; Dyah Ayu Sri Hartanti; Siti Aminatuz Zuhria
STIGMA: Jurnal Matematika dan Ilmu Pengetahuan Alam Unipa Vol 15 No 02 (2022)
Publisher : Universitas PGRI Adi Buana Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36456/stigma.15.02.6378.73-76

Abstract

Mahagony plants are found in Indonesia. The leaves of this plant contain high levels of antioxidants and flavonoids, so they can be useful as antioxidant. In the study, mahogany leaves were extracted using the maceration extraction method, after obtaining the mahogany leaf extract, further tests were carried out to determine the antioxidant and flavonoid content in it. Antioxidant testing was carried out using the DPPH method (1.1 Dhipenyl 2 Pycnihydrazy). namely 2500 ppm, 1250 ppm, 625 ppm, 3125 ppm and also 156.25 ppm. The ability of antioxidant compounds contained in each concentration was 2500 ppm at 76 09%, 1250 ppm at 70.57%, 625 ppm at 67 96% 3125 ppm absatat 61 77% and 1565 at 13.95% The lowest inhibitory power was found at the highest concentration. ie 2500 ppm Mahogany leaves are strong antioxidants, as evidenced by a high value of 1650 (IC50 100) in the results of the mahogany plant leaf extract test. While the content of flavonoids shows that in the leaves of the mahogany plant there is a flavonoid actxawa. Total levels of flavonoids dissolved in a concentration of 100 ppm achesar 44.4 QEg This study is able to provide information about the potential of mahagony plant leaves as antioxidants.
Sintesis nanopartikel nikel hidroksida dengan menggunakan tween 20 dan PEG 400 Yanatra Budi Pramana; M. Sochibul A’lal Ma’arif; Sabdari Bella Chrisdia; Aprilia Isti Triantini; Akhmad Solikin; Krisyanti Budipramana
STIGMA: Jurnal Matematika dan Ilmu Pengetahuan Alam Unipa Vol 15 No 02 (2022)
Publisher : Universitas PGRI Adi Buana Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36456/stigma.15.02.6450.77-80

Abstract

In this study we compared the synthesis of nickel hydroxide nanoparticles using two different solutions, namely tween 20 and PEG (Polyethylene Glycol) 400, the electrolysis method used 0.3 M sodium citrate with the addition of tween 20 and PEG 400, using a potential of 25 Volts for 30 minutes. Obtained nickel hydroxide nanoparticles. Scanning electron microscopy (SEM) is used for morphological characterization of the product. Nickel hydroxide nanoparticles added with tween 20 were in the form of nanoflowers, while nickel hydroxide nanoparticles added with PEG 400 were in a spherical shape. Keywords: High Voltage,Electrolysis, Ni(OH)2 nanoparticles
Keanekaragaman Tumbuhan Berpotensi Obat Di RPH Sekar Kabupaten Malang Purity Sabila Ajiningrum; Aisah Erviana
STIGMA: Jurnal Matematika dan Ilmu Pengetahuan Alam Unipa Vol 15 No 02 (2022)
Publisher : Universitas PGRI Adi Buana Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36456/stigma.15.02.6452.81-87

Abstract

The purpose of this study was to determine the value of the index of biodiversity and the value of the important index of medicinal plants that exist in the protected forest of RPH Sekar Malang. This study used the plot line method and was carried out in stages, namely sampling, determining the location path that had been surveyed and making measuring plots consisting of 8 plots with a distance of 100 m between plots with a plot size of 20m x 20m. The research data were analyzed using the diversity value index, vegetation analysis and descriptive utilization. Based on the results of the identification and determination of potential medicinal plants, 8 species of medicinal plants were found. The total number for the diversity value index is 1. This indicates that the medicinal plant diversity index in the RPH Sekar protected forest area is in the moderate category. The importance value index for the seedling category showed the highest yield in Piper aduncum of 20.167, the stake category was Centella asiatica with the highest score of 2.899 and for the pole and tree category the largest was shown in the same species, Dendrocnide stimulant with a pole value of 6.771 and a tree value of 13.15. Keywords; Diversity, Protected Forest, Medicinal Plants
Aktivitas Antioksidan Umbi Bawang Dayak (Eleutherine bulbosa) Yang Diberi Pupuk Kompos Cair Daun Paitan (Thitonia diversifolia) Hasil Fermentasi Ragi Tape Fita Afifaturrosydah; Tatang Sopandi; Vivin Andriani
STIGMA: Jurnal Matematika dan Ilmu Pengetahuan Alam Unipa Vol 15 No 02 (2022)
Publisher : Universitas PGRI Adi Buana Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36456/stigma.15.02.7001.82-91

Abstract

Dayak onion (Elrutherine bulbosa) is a plant that is efficacious for treating various health problems because it is known to contain secondary metabolites flavonoids that function as antioxidants. However, synthesis and antioxidant activity of secondary metabolites flavonoids and non-flavonoids are influenced by fertilization. This study aims to test the antioxidant activity of Dayak onion tubers which are given the liquid compost of the fermented tape. The study was conducted experimental using a complete random experimental design 4 Treatment for the concentration of Paitu Yaotu leaf fertilizer 10%, 20%, 30%, and 40%. Giving water distilata and NPK fertilizer (16:16:16) is used as a negative and positive control. The results showed that the fertilization of the liquid compost of the fermented leaf fermented tape had a significant effect (p <0.05) on the antioxidant activity of Dayak onion tubers. Giving with a concentration of 20% is the optimal concentration of compost liquid fertilizer with ferrmed tape yeast with IC50 value 86.01 μg/ml. Keywords: fertilizer, paitan plant leaves, tape yeast, dayak onion plant
PENGARUH BENZYL AMINO PURIN (BAP) TERHADAP INDUKSI TUNASEKSPLAN TANGKAI DAUN (Petiolus) DAN TULANG DAUN (Penninervis) DUKU (Lansium domesticum Corr) PADA MEDIA MURASHIGE AND SKOOG ARIF YACHYA; Amin Nurokhman; Linda Novitasari; Ummi Hiras Habisukan
STIGMA: Jurnal Matematika dan Ilmu Pengetahuan Alam Unipa Vol 16 No 1 (2023)
Publisher : Universitas PGRI Adi Buana Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36456/stigma.16.1.7248.1-9

Abstract

Duku (Lansium domesticum. Corr) is one of the fruit plants that grows a lot in Indonesia, especially in South Sumatra. Duku fruit has a fairly high level of consumption but takes a long time to reproduce. Modern duku propagation is an effort that can be used to overcome problems that occur in conventional duku cultivation. One of the efforts to propagate duku in a modern way can be done through tissue culture techniques. Tissue culture techniques can produce plants in large quantities and have the same characteristics and characteristics as the parent. This research was conducted from September 2022 – November 2022, taking place in the tissue culture room, the Integrated Laboratory of Raden Fatah State Islamic University Palembang. This type of research is descriptive quantitative with experimental method using Completely Randomized Design (CRD) with 5 treatments (0.0 ppm, 1.0 ppm, 1.5 ppm, 2.0 ppm and 2.5 ppm) and 5 repetitions. This study was to determine the response of petiole and leaf bone explants to tuna induction by BAP hormone administration. The best research results were given a concentration of 1.0 ppm BAP with growth time at 7 HST with the formation of bulges (nodules) on the upper surface of the explants.
PEMANFAATAN EKSTRAK TANAMAN SIRIH WATI (Piper methysticum G. Forst.) SEBAGAI INSEKTISIDA NABATI DALAM MENGENDALIKAN HAMA ULAT GRAYAK (Spodoptera litura F.): PEMANFAATAN EKSTRAK TANAMAN SIRIH WATI (Piper methysticum G. Forst.) SEBAGAI INSEKTISIDA NABATI DALAM MENGENDALIKAN HAMA ULAT GRAYAK (Spodoptera litura F.) Inrianti; Sepling Paling; Tebina Wenda
STIGMA: Jurnal Matematika dan Ilmu Pengetahuan Alam Unipa Vol 16 No 1 (2023)
Publisher : Universitas PGRI Adi Buana Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36456/stigma.16.1.7272.10-16

Abstract

The aim of the study was to determine the effect of various concentrations of betel leaf extract Wati (Piper methysticum G. Forst.) on the mortality rate of armyworm (Spodoptera litura F.) and to see which extract concentration is more effective in controlling armyworm pest (Spodoptera litura F.) in sweet potato (Hypere). This research was conducted from June to August 2019 at the Petra Baliem Wamena College of Agricultural Sciences Laboratory using a non-factorial Completely Randomized Design (CRD) with 6 treatments and 4 replications. Tests using betel leaf extract (Yulliaoken) with a concentration of 40%, 50%, 60%, 70%, 80%, 90%. Measurements were made on the mortality rate of armyworms in the form of a percentage (%). This research was carried out through 2 stages, namely: the preliminary test stage and the follow-up test stage. The results showed that Wati betel leaf extract (Piper methysticum G. Forst.) can increase the mortality of armyworm pests (Spodoptera litura F.) by administering the extract through immersion so that through feed, Wati betel leaf extract has the potential to be a stomach poison. The most effective concentration of betel leaf extract in increasing the mortality of second instar armyworm caterpillars was at concentrations of 80% and 90% within 5 hours. Thus, Wati betel leaf extract can be used as an effective vegetable insecticide in increasing the mortality of armyworm pests.
Pengaruh Pemberian Pupuk Organik Cair Terhadap Pertumbuhan Dan Hasil Tanaman Cabe Keriting (Capsicum annum L.) Rini Rahayu Sihmawati; Tiurma Wiliana Susanti P; Wardah
STIGMA: Jurnal Matematika dan Ilmu Pengetahuan Alam Unipa Vol 16 No 1 (2023)
Publisher : Universitas PGRI Adi Buana Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36456/stigma.16.1.7292.17-22

Abstract

This study aims to determine the effect of the effectiveness of applying liquid organic fertilizer on the growth and yield of curly chili plants. This study used 3 kinds of liquid organic fertilizer compositions, namely SA (70% vegetable liquid organic fertilizer and 30% animal liquid organic fertilizer) which is not pasteurized and SB (70% vegetable liquid organic fertilizer and 30% animal liquid organic fertilizer) pasteurized. The doses given to plants by spray are SA (2 ml/liter of water), SB1 (2 ml/liter of water) and SB2 (4 ml/liter of water). This study was repeated four times, then the data were analyzed using Anava. If there is a difference, the effect is then tested with a 5% LSD test. Research shows that the use of liquid organic fertilizer that is pasteurized with a concentration of 4 ml/l water (SB2) showed the best results for the height of plant, number of leaves, and number of chilies, while for the number of branches that used the pasteurized liquid fertilizer (SB1 and SB2) showed better results than the liquid fertilizer that is unpasteurized (SA). Keywords : Liquid Organic Fertilizer, Curly Chili

Page 14 of 17 | Total Record : 170

 12   13   14   15   16 

Filter by Year

2010 2025


Reset
Filter By Issues
All Issue Vol 18 No 02 (2025) Vol 18 No 01 (2025) Vol 17 No 01 (2024) Vol 16 No 2 (2023) Vol 16 No 1 (2023) Vol 15 No 02 (2022) Vol 15 No 01 (2022) Vol 14 No 02 (2021) Vol 14 No 01 (2021) Vol 13 No 02 (2020) Vol 13 No 01 (2020) Vol 12 No 02 (2019) Vol 12 No 01 (2019) Vol 11 No 02 (2018) Vol 11 No 01 (2018) Vol 10 No 02 (2017) Vol 10 No 01 (2017) Vol 9 No 02 (2016) Vol 9 No 01 (2016) Vol 8 No 02 (2015) Vol 8 No 01 (2015) Vol 7 No 02 (2014) Vol 7 No 01 (2014) Vol 6 No 02 (2013) Vol 4 No 01 (2010) More Issue