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EKOLOGIA : Jurnal Ilmiah Ilmu Dasar dan Lingkungan Hidup
Published by Universitas Pakuan
ISSN : 14419447     EISSN : 26864894     DOI : 10.33751
Core Subject : Science, Education, Social, Engineering,
Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Environmental Science Mathematics
Ekologia adalah jurnal ilmiah yang diterbitkan untuk mengakomodasi tulisan hasil penelitian bagi sivitas akademika Universitas Pakuan khususnya dan instansi lain di luar Universitas Pakuan pada umumnya. Jurnal ini memuat artikel primer yang bersumber langsung dari hasil penelitian Ilmu Dasar dan Lingkungan Hidup. Ekologia diterbitkan dua kali dalam setahun yaitu pada bulan April dan Oktober oleh Fakultas Matematika dan Ilmu Pengetahuan Alam-Universitas Pakuan. Semoga Jurnal ini bermanfaat bagi perkembangan hasanah ilmu pengetahuan.
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Articles 402 Documents
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EFEK SAMPING EKSTRAK ETANOL 96% DAN 70% HERBA KEMANGI (Ocimum americanum L.) YANG BERSIFAT ESTROGENIK TERHADAP KADAR ASAM URAT PADA TIKUS PUTIH Husna, Rina Siti Nurul; Effendi, E. Mulyati; Maheshwari, Hera
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Publisher : Fakultas Matematika dan ilmu pengetahuan Alam. Universitas Pakuan.

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Abstract

The aims of study was determine the effect of 70% and 96% ethanolic extracted of estrogenic herb basil on increasing or decreasing the level of uric acid in female rats. The animals used were 24 rats that were divided into six groups which consist of four animals each. Group I was animal that were given at a dose 0,7g/200g BW of 70% ethanolic extracted basil. Group II was the same concentration of basil extract at a dose 0,8g/200g BW. Group III was also the concentration of basil extract at a dose 0,9g/200g BW. Group IV was animals that were given at a dose 0,7g/200g BW of  96% ethanolic extracted basil. Group V was the same concentration of basil extract at a dose 0,8g/200g BW. Group VI was also the concentration of basil extract at a dose 0,9g/200g BW. The result showed that the ethanol extract of the basil herb had no significantly affected uric acid, there was even a tendency  to decrease lower uric acid level after given during 15 days. Key words : Uric Acid, Estrogenic, Herb Basil
PENDUGAAN PARAMETER MODEL PENINGKATAN POPULASI PEROKOK DENGAN METODE DEKOMPOSISI ADOMIAN MULTISTAGE Wijayanti, Hagni; Wihartiko, Fajar Delli
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Publisher : Fakultas Matematika dan ilmu pengetahuan Alam. Universitas Pakuan.

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Abstract

The prevalence of smoking in Indonesia over the years tend to experience increased. Increasing cigarette consumption in Indonesia will affect public health conditions and demanding high fees from the public, so that the necessary control of the consumption of cigarettes wisely. The smoking prevalence of the problem, can be made a mathematical formulation. There are three parameters involved, namely the active smoker population, the population of smokers and potential smokers who've stopped population, along with the change in time. Identify the parameter is very important, because it can show how the problem of the prevalence of smokers. In this study used method of Multistage Adomian Decomposition (MADM) which gives the solution of the model population increase smokers as solution series t (time) for each subinterval m during the period from [0, T]. The resolution of the model and the simulation model do with programming in Mathematica version 8. Key words : method of Multistage Adomian Decomposition (MADM),  prevalence of smokers
SUBSTITUSI TEPUNG TERIGU DENGAN TEPUNG AMPAS KEDELAI PADA PRODUK COOKIES YANG KAYA AKAN SERAT PANGAN DAN PROTEIN Adhimah, Novy Nur; Mulyati, Ade Heri; Widiastuti, Diana
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Publisher : Fakultas Matematika dan ilmu pengetahuan Alam. Universitas Pakuan.

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Abstract

Soybean waste is one of the alternative sources of fiber which is a by-product in the manufacture of tofu and contains high crude protein. Fiber and protein are given in the form of soybean pulp with variation of 0-40%. This study aims to determine the addition of maximal soybean pulp that provides the properties of cookies that can be accepted by the public and to know the physical properties, microbiology, chemistry including food fiber. The best soybean dregs flour is without washing, steaming. Soybean flour without washing, steaming has 11.65% water content, 3.15% ash, 18.37% protein, 1.25% total food fiber, 0.94% insoluble food fiber, 0 soluble food fiber, 31%, lead <0.04 ppm, cadmium <0.005 ppm, and zinc 20.80ppm, total plate counts (ALT) of 2 x 102 kol / gram, E.coli <3 AMP / gram, / gram. Cookies C5 with the ratio of soybean flour and wheat flour (40%: 60%) are selected products, physical characteristics of soybean cookies include color parameters, aroma, crispness and flavor. The result of analysis of nutrient content of cookies obtained by water content 2,22%, ash 2.20%, protein 7.2%, total food fiber (TDF) 0.85%, insoluble food fiber (IDF) 0,51, soluble (SDF) 0.33%, zinc 25.60 ppm, lead <0.04 ppm, cadmium <0.005 ppm Total total plate count (ALT) of 25 x 10-1 cab / gram, E.coli <3 AMP / gram, mold <10 kol / gram. Key words : Food Disversivication, Soybeans, Cookies, Proteins, Food Fiber
EVALUASI KEBERLANJUTAN PENGELOLAAN PERKEBUNAN KELAPA SAWIT POLA INTI-PLASMA DI PT.PERKEBUNAN NUSANTARA VII MUARA ENIM, SUMATERA SELATAN (Evaluation and Status of Sustainable Palm Oil Management in PT.Perkebunan Nusantara VII Muara Enim, South Sumatera) -, Ruslan; Sabiham, Supiandi; -, Sumardjo; -, Manuwoto
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Publisher : Fakultas Matematika dan ilmu pengetahuan Alam. Universitas Pakuan.

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Abstract

There were three pilars of  palm oil plantation in Indonesia, state-owned large estates and private estates which total extensive oil palm plantations area in 2005 were 5.445 thausands  hectares with 12.452 thausands million tons production crude palm oil. The composition of the plantation farmers  area was 40,02 %, national large plantations was about  13,96 %, and  48,68  % for private estates.There are two types of Management of their field, nucleous estate smallholders  (NES) and farmers. Unfortunately farmers better than independent farmers in managing the  estates, because there was cooparation between the farmers with the nucleous companies. The PIR system stated that the nucleous  plantation companies were useful in developing and crops farmers market assigning, While the farmers must manage his estates well and market the results through the company's nucleous. Sustainability analysis conducted by the method of Multi Dimensional Scaling (MDS) approach  with Rap-Insus palm oil techniques (Rapid Appraisal-Index Sustainability of palm oil Management). Analysis of key factors of sustainability management performed a prospective analysis of the sensitivity factors (leverage factor) of the MDS and the factors from the analysis of stakeholders' needs. The results showed that the status of sustainability of palm oil management in   PT.Perkebunan Nusantara VII Muara Enim, South Sumatera)was quite sustainable with a multidimensional index of 67,67.
PEMANFAATAN BAKTERI ANTAGONIS TERHADAP PENGENDALIAN JAMUR PATOGEN Fusarium oxysporum dan Phytopthora capsici SECARA IN VITRO Haryani, Tri Saptari; Tombe, Olivia Mersylia
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Publisher : Fakultas Matematika dan ilmu pengetahuan Alam. Universitas Pakuan.

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Abstract

Jamur Fusarium oxysporum merupakan patogen yang dapat menyebabkan penyakit busuk batang pada tanaman vanili. Adanya pembusukan pada jaringan batang tersebut merupakan ciri khas dari penyakit busuk batang. Gejala khas dari serangan patogen pada pangkal batang mengakibatkan pangkal batang menjadi berwarna hitam. Salah satu cara untuk mengendalikannya yaitu menggunakan agen pengendali hayati berupa bakteri antagonis. Tujuan dari penelitian ini untuk mendapatkan satu isolat bakteri antagonis yang paling efektif menekan pertumbuhan koloni serta perkecambahan konidia dan zoospora  patogen Fusarium oxysporum dan Phytopthora capsici. Penelitian dilakukan secara in vitro, tahapan kegiatan dalam penelitian ini meliputi sterilisasi alat, pembuatan media, pembuatan inokulum, pengujian antagonis isolat bakteri dan filtratnya serta pengamatannya. Bahan yang digunakan adalah isolat F.oxysporum, P.capsici dan sembilan isolat bakteri. Hasil penelitian menunjukkan bahwa dari sembilan isolat bakteri terdapat satu isolat bakteri paling efektif menghambat pertumbuhan patogen F.oxysporum yaitu isolat bakteri AKT7 sebesar 29,91% sedang isolat bakteri paling efektif menghambat patogen P.capsici yaitu isolat bakteri B5A sebesar 54,42% . Filtrat bakteri AKT7 mampu menghambat perkecambahan konidia F.oxysporum dan zoospora P.capsici. Kata kunci :  Fusarium oxysporum ,  Phytopthora capsici, bakteri antagonis
PRAKONSENTRASI DAN ANALISIS ION KADMIUM BERBASIS FLOW INJECTION ANALYSIS Hasanah, Uswatun; Rusnadi, -; Amran, Bachri
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Publisher : Fakultas Matematika dan ilmu pengetahuan Alam. Universitas Pakuan.

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Abstract

CD-imprinted polymers (Cd-IPs) have been synthesized and retensinya properties have been studied for the pre concentration and analysis of cadmium concentration at the level of µ g L-1berbasis technique of flow injection analysis (FIA). This procedure is based on the retention of ions Cd (II) on Cd-IPs are synthesized. Retention cadmium ions can elution quantitatively with a solution of nitric acid directly onto the nebulizer system for atomic absorption spectrometer. The retention capacity of the Cd-IPs acquired for 20.10 mg g-1pada pH optimum and shows a quick retention kinetics. Analytical parameters such as retention capacity, the volume of the sample, the concentration and volume of eluen have been evaluated to obtain a good analytical performance. The system being developed makes it possible to analyze 15 samples per hour, with a limit of detection of the 8 µ g L-1. For the concentration of 50 μg L-1 has obtained precision values expressed as percent relative standard deviation of 1.6 (n = 5). A method of analysis that was developed has been used for the determination of cadmium in river water samples Cidurian, West Java, Indonesia with satisfactory results. Key words:  consentration, analyzing miniscule, cadmium, FIA
PAKAN DAN PERTUMBUHAN IKAN KERAPU CANTANG (Epinephellus fuscoguttatus-lanceolatus) Rahmaningsih, Sri; Ari, Agung Isfan
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Publisher : Fakultas Matematika dan ilmu pengetahuan Alam. Universitas Pakuan.

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Abstract

Ikan kerapu cantang (Epinephellus fuscoguttatus-lanceolatus) termasuk kelompok ikan kerapu yang berharga tinggi. Jenis kerapu ini merupakan hasil persilangan ikan kerapu macan (Epinephellus fuscoguttatus) dan ikan kerapu kertang (Epinephellus lanceolatus). Tingkat pertumbuhan ikan kerapu ini sementara menunjukkan pertumbuhan yang lebih cepat jika dibandingkan dengan kerapu lain yaitu dalam masa pemeliharaan 7 bulan dapat mencapai berat 5 - 7 ons/ekor. Penelitian ini bertujuan untuk mengetahui pengaruh jenis pakan yang berbeda terhadap pertumbuhan ikan kerapu cantang (Epinephelus fuscoguttatus-lanceolatus). Penelitian ini dilaksanakan di Tambak percobaan Fakultas Perikanan dan Kelautan UNIROW selama dua bulan yaitu pada bulan April – Juni 2013. Metode penelitian yang digunakan adalah metode eksperimen, dengan rancangan penelitian yang digunakan adalah  RAK (Rancangan Acak Kelompok). Perlakuan yang diberikan adalah perbedaan jenis pakan yang berbeda setiap perlakuan yaitu ;(A) Pakan ikan rucah atau ikan segar (B) Pakan butiran pellet (C) Pakan yang dikombinasikan antara ikan rucah dan pellet. Masing-masing pakan diberikan dengan jumlah yang sama yaitu prosentase pakan 10 – 15% dari bobot tubuh ikan dan pemberian pakan dilakukan pada pagi dan sore hari. Berdasarkan hasil penelitian  menunjukan bahwa perlakuan C dengan pemberian pakan berupa ikan segar dan pellet memberikan hasil yang berbeda terhadap pertumbuhan berat, sedangkan perlakuan B memberikan hasil terbaik untuk pertumbuhan panjang. Kata kunci : kerapu cantang (Epinephellus fuscoguttatus-lanceolatus), pertumbuhan
ANALISIS METODE LAGRANGE DAN TRANSFORMASI LAPLACE DALAM MENGHITUNG MUATAN RANGKAIAN LISTRIK SEDERHANA Rohaeti, Embay
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Publisher : Fakultas Matematika dan ilmu pengetahuan Alam. Universitas Pakuan.

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Abstract

Dalam menghitung muatan rangkaian listrik sederhana biasanya diselesaikan dengan ilmu Fisika.  Salah satu solusi alternatif lain adalah dengan menggunakan Persamaan Differensial berupa metode Lagrange dan Transformasi Laplace. Keywords:  Rangkaian  Listrik  Sederhana,  Persamaan  Differensial,  Metode  Lagrange, Transformasi Laplace.
VALIDASI METODE UJI KADMIUM DALAM AIR SUMUR SECARA SPEKTROFOTOMETRI SERAPAN ATOM Ade Heri; Sutanto Sutanto
EKOLOGIA Vol 16, No 1 (2016): JURNAL ILMIAH ILMU DASAR DAN LINGKUNGAN HIDUP
Publisher : Universitas Pakuan

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Abstract

This validation is refer to SNI 17025:2008 which detail linearity, precision, and accuracy that conducted 7 times. The detection limit is taken from making standard by using AAS graphic from PG type 990 and then the result used for analyzing of cadmium in well water. 2 liter of the sample (that take from one well in designated area) is aspired into AAS with 228,8 nm wave length. According to the result of this method, got the linearity with coefficient regretion value 0,9997, detection limit 0,0028 mg/L, precision of unspike sample with RSD value RSD 10,77 % and precision of spike sample with RSD 0,16 %, and recovery for accuracy value 86,44 % - 90,30 %. This method give the result the meet the requirement for validation applied, so that the method can be used for routine of cadmium content in well water.Average of cadmium content in well water is 0,0247 mg/L.Keyword : Validation methode, Cadmium, Well water, Atomic Absorption Spectrophotometer
PEMANFAATAN EKSTRAK DAUN BABANDOTAN (Ageratum conyzoides) SEBAGAI BIOHERBISIDA GULMA RUMPUT TEKI (Cyperus Rotundus) Arfa Ul Hikmah; F.G Bilkis; D.G. Maelani; - Triastinurmiatiningsih
EKOLOGIA Vol 18, No 1 (2018): EKOLOGIA: JURNAL ILMIAH ILMU DASAR DAN LINGKUNGAN HIDUP
Publisher : Universitas Pakuan

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (160.15 KB) | DOI: 10.33751/ekol.v18i1.804

Abstract

Weeds are detrimental due to lower agricultural yields due to competition in water acquisition, nutrients, living areas, degradation of yield quality, into host pests and diseases, poisoning plants due to toxic compounds or alleles. One of the weeds on agricultural produce is grass (Cyperus rotundus) because it has allelopathic compounds. At this time alternative weed control that is environmentally minded rampant done by looking for potency of phenol group compound from other plant so that can be utilized as bioherbisida. Babandotan (Ageratum conyzoides) containing active compounds such as saponins, flavonoids, tannins, essential oils and polyphenols are safe and environmentally friendly bioherbicides. The purpose of this study to determine the concentration of babandotan leaf extract that can inhibit the growth of weeds teki grass. Babandotan extract is made through the maceration method. Babandotan concentrations consist of 50%, 20%, 10% and 5% and control. Phytochemical test was conducted to determine the chemical content contained in babandotan leaf. The results showed that leaf extract of babadotan can inhibit the growth of grass teki at concentration 50%.Key words: Cyperus rotundus, Ageratum conyzoides, bioherbisida

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