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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 6 Documents
 1 
Search results for , issue "Vol 7 No 01 (2014)" : 6 Documents clear
KUALITAS AIR SUNGAI YANG DIOLAH MENJADI AIR BERSIH DENGAN MENGGUNAKAN SERBUK KAKTUS CENTONG (Opuntia cochenillifera) Nurullah nurullah; Pungky Slamet Wisnu Kusuma
STIGMA: Jurnal Matematika dan Ilmu Pengetahuan Alam Unipa Vol 7 No 01 (2014)
Publisher : FMIPA : Universitas PGRI Adi Buana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36456/stigma.vol7.no1.a505

Abstract

Bakteri Escheria coli merupakan indikator utama sanitasi lingkungan termasuk air konsumsi. Telah dilakukan penelitian yang bertujuan untuk mengetahui pengaruh penggunaan serbuk kaktus centong (Opuntia cochenillifera) terhadap kejernihan, jumlah bakteri total dan E.coli air sungai. Sebanyak 5 perlakuan konsentrasi serbuk kaktus (0, 0,5,1,0, 1,5 dan 2,0 g/l) masing-masing ditambahkan ke dalam 1 l air sungai Jagir. Setelah diaduk merata, campuran dibiarkan selama 3 hari pada suhu ruang, dan disaring menggunakan kertas saring. Pengukuran kerjernihan filtrat dilakukan menggunakan TDS meter, jumlah bakteri total dan E. coli diukur menggunakan metode plate count agar. Semua perlakuan konsentrasi serbuk kaktus diulang 4 kali. Hasil penelitian menunjukkan bahwa penggunaan serbuk kaktus berpengaruh signifikan (P<0,05) terhadap kejernihan, jumlah bakteri total, dan E.coli. Penggunaan serbuk kaktus 2,0 g/l signifikan (P<0,05) dapat meningkatkan kejernihan air sampai 21,5 pt-co, serta menurunkan jumlahbakteri total sampai 1,2 x 102 dan E. coli sampai 0,1 x 101. Hasil penelitian dapat simpulkan bahwa serbuk kaktus centong dapat digunakan sebagai bahan dasar pengolahan air bersih untuk meningkatkan kejernihan dan menurunkan jumlah bakteri total dan E. coli.
TOKSISITAS EKSTRAK DAUN JERUK NIPIS (Citrus aurantifolia L) DAN EKSTRAK SERAI (Cymbopogon nardus L) PADA LARVA NYAMUK Aedes aegypti S.Z Nisak; Susie Amilah
STIGMA: Jurnal Matematika dan Ilmu Pengetahuan Alam Unipa Vol 7 No 01 (2014)
Publisher : FMIPA : Universitas PGRI Adi Buana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36456/stigma.vol7.no1.a506

Abstract

ABSTRACT This study aims to menegetahui effect of leaf extracts of lime (Citrus aurantifolia) and extract lemongr ass (Cymbopogon nardus) on mortality of larvae of Aedes aegypti and A. aegypti. The design of this study used a sample of 500 larvae of A. aegypti who has reached the third instar, the test was divided into 2 groups, each group has the same concentration of test ie 0, 0,5, 1,0, 1.5, and 2,0 g / l. Each test group contained 25 larvae in the leaf extract solution of lime and lemongrass with replication performed 4 times. Based on the analysis of the effect of the leaf extract of citrus and lemon grass extracts and concentrations that meet the criteria in the ability to kill larvae were started at a concentration of 0, 0,5, 1,0, 1,5, and 2,0 g/l. Concentration of extract lime leaves and lemongrass extracts can kill mosquito larvae A. aegypti is the lime leaf extract concentration of 2,0 g / l with an average mortality of larvae as larvae 18,75. While the lemongrass extract concentrations that kill larvae more effectively is 2,0 g / l with an average mortality of larvae as larvae 16,25. T-test results showed that there was no significant difference (P> 0,05) between the leaf extract lemon with lemon grass extract against mosquito larvae mortality rate A. aegypti. Can be concluded that the leaf extract of lemon and lemongrass naymuk effect on mortality of larvae of A. aegypti. Lethal concentration 50 to extract lime leaves and lemongrass extracts respectively 1,57 and 1,59 g / l in water. Keywords: lime, lemon grass, A. aegypti, and mortality
PENGARUH BERBAGAI KONSENTRASI SARI DAGING BUAH APEL (Molus domestica) TERHADAP KARAKTERISTIK DAN HASIL UJI ORGANOLEPTIK NATA DE APPLE C. Sudarwati; Susie Amilah
STIGMA: Jurnal Matematika dan Ilmu Pengetahuan Alam Unipa Vol 7 No 01 (2014)
Publisher : FMIPA : Universitas PGRI Adi Buana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36456/stigma.vol7.no1.a507

Abstract

This study aims to prove the effect of the concentration of fruit juice puch as nata de apple production materials to the production of nata,suppleness and organoleptic characters.The design used in this study was a completely randomized design (CDR) consisting of 3 perlakuan namely 500 gr,750 gr, 1000 gr.1 liter each were taken and repeated 6kali and added sugar 10%, urea 0,5% and 10% starter.The results showed the concentr ation of water and fruit juice apple significantly (p>0,05) on the influence the textur of nata with the highest combination of treatment 750 gram,and the lowest yield on treatment 500 gram.Concentrasi of water and fruit apple was also significanty (p>0,05) on the production of nata with combination treatment 750 gram,for odor and flavor character,but for the color of the panelists preferred the combination treatment nata 500 gram. Keywords: Molus domestica, Nata, Production, Texture organoleptik
EFEK PERLAKUAN KULIT BIJI BUNGA MATAHARI (Heliantthus annuus L) TERHADAP PRODUKSI BIOETANOL OLEH Saccharomyces cerevisiae F.R. Wirandasari; Tatang Sopandi
STIGMA: Jurnal Matematika dan Ilmu Pengetahuan Alam Unipa Vol 7 No 01 (2014)
Publisher : FMIPA : Universitas PGRI Adi Buana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36456/stigma.vol7.no1.a508

Abstract

The research aimed of this study to sought determine effect pre-treatment of peel seeds, sunflower on bioethanol and fermentation efficiency in hydrolysis medium of peel sunflower seeds. The study was carried out experimentally using a completely randomized design. Skin pretreatment sunflower seeds on the production of bioethanol by Saccharomyces cerevisiae consists of pre-treatment controls, in stream for 3 hours at 1210C, hydrolysis H2SO4 and NaOH hydrolysis. The result of this study should pre-treatment have (P<0,05) effect of bioethanol production. Key words: Saccharomyces cerevisiae, Bioethanol, Nitrogen, Carbon, Leather Sunflower Seed (Helianthus annuus L), fermentation efficiency
PEMANFAATAN JERAMI NANGKA (Artocarpus heterophyllus) SEBAGAI BAHAN BAKU YOGHURT NANGKA N. Winarsih; Tatang Sopandi
STIGMA: Jurnal Matematika dan Ilmu Pengetahuan Alam Unipa Vol 7 No 01 (2014)
Publisher : FMIPA : Universitas PGRI Adi Buana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36456/stigma.vol7.no1.a509

Abstract

Has done research on the utilization of straw jackfruit (Artocarpus heterophyllus) as a raw material jackfruit yogurt. The study was conducted using 400 g straw jackfruit divided into 4 treatment groups of each 100 g. Each treatment group was added water with straw comparison with water 1:3, 1:4, 1:5, and 1:6 in order to obtain the concentration in the medium straw jackfruit 333, 250, 200, and 170 g / l. Furthermore, from each treatment group divided by 5 as replication. After fermentation for 72 hours with a temperature of 28-30 &ordm; C, analyzed the number of bacteria, nitrogen, carbon, glucose, viscosity and assessment of sensory characteristics (odor, taste and color) jackfruit yogurt straw. The results showed that the use of straw as a raw material jackfruit yogurt affect the amount of bacteria, nitrogen, carbon, glucose and viscosity but had no significant effect (P < 0.05) on sensory characteristics (odor, taste and color) yogurt. Keywords: straw jack fruit, yoghurt
PENGGUNNAN EKSTRAK BIJI PEPAYA (Carica Papaya L) SEBAGAI LARVASIDA NABATI TERHADAP KEMATIAN LARVA NYAMUK ANOPHELES DAN AEDES AEGYPTI INSTAR III I. Nafi’ah; Sulistyowati Sulistyowati
STIGMA: Jurnal Matematika dan Ilmu Pengetahuan Alam Unipa Vol 7 No 01 (2014)
Publisher : FMIPA : Universitas PGRI Adi Buana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36456/stigma.vol7.no1.a510

Abstract

Testing has been conducted on pesticide seed water extract of papaya (Carica papaya L). This research aims to study the killing power of papaya seed extract as a botanical pesticide against mosquito larvae of Anopheles and Aedes aegypti. Larvae of Aedes aegypti and Anopheles mosquitoes respectively 350 were divided into 11 groups. Furthermore each group were sprayed with water extract of papaya seeds with 0, 20, 40, 60, 80, 100, 120, 140, 160, 180, and 200%. The results showed that the water extract of papaya seeds can kill the mosquito Anopheles larvae and A. Aegypti. Concentration of papaya seed extract is effective in killing mosquito larvae Anopheles and A. Aegypti respectively 80% and 180%. Keywords: papaya seeds, Anopheles and Aedes aegypti

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