scholarly journals Pengaruh Konsentrasi Pupuk Azolla pinata Terhadap Pertumbuhan Populasi Spirulina platensis [The Effect Of Azolla pinata Fertilizer Concentration In Spirulina platensis Population Growth ]

2019 ◽  
Vol 4 (1) ◽  
pp. 39
Author(s):  
Faricha Risma Nurani, Endang Dewi Masithah, A. Shofy Mubarak
Keyword(s):  
Population Growth ◽  
Spirulina Platensis ◽  
Anabaena Azollae

Abstract Spirulina merupakan salah satu jenis alga yang sangat diminati oleh produsen pembenihan dan suplemen kesehatan. Hal yang dapat mendorong peningkatan produksi Spirulina adalah peningkatkan pertumbuhan, yaitu meningkatkan jumlah sel. Salah satu cara untuk meningkatkan pertumbuhan fitoplankton adalah mengontrol kandungan nutrien baik makro maupun mikro pada lingkungan budidaya. Azolla pinata memiliki berbagai unsur hara antara lain N, P, K, Ca, S, Mg, Mn, Fe, Zn, Co. Kandungan unsur kimia dalam Azolla pinata secara kualitatif dan kuantitatif dapat memenuhi kebutuhan unsur makro dan mikro pertumbuhan Spirulina platensis. Azolla pinata merupakan tanaman paku mini yang bersimbiosis dengan cyanobacteria pemfiksasi N2 yaitu Anabaena azollae. Simbiosis ini menyebabkan Azolla pinata sebagai sumber N. Tujuan dari penelitian ini adalah untuk mengetahui pengaruh konsentrasi pupuk Azolla pinata terhadap pertumbuhan populasi Spirulina platensis dan untuk mengetahui konsentrasi optimal pupuk Azolla pinata yang dapat menghasilkan pertumbuhan tertinggi Spirulina platensis. Penelitian dilaksanakan di Fakultas Perikanan dan Kelautan Universitas Airlangga Surabaya. Rancangan penelitian yang digunakan adalah Rancangan Acak Lengkap (RAL) dilanjutkan dengan uji jarak berganda Duncan. Bahan uji yang digunakan dalam penelitian ini adalah S. platensis yang dikultur pada botol kaca 500 ml dengan lima perlakuan dan empat kali ulangan. Bahan pupuk yang digunakan adalah 500 gram Azolla pinata dan 2 liter aquades. Konsentrasi pupuk Azolla pinata yang diberikan pada perlakuan adalah A (3,5 ml), B (5,5 ml), C (7,5 ml), D (9,5 ml), E (kontrol Walne 1 ml). Parameter utama yang diamati adalah populasi, sedangkan parameter pendukung yang diamati adalah suhu, pH, dan salinitas. Hasil penelitian menunjukkan bahwa konsentrasi pupuk Azolla pinata memberikan pengaruh yang berbeda nyata terhadap pertumbuhan populasi Spirulina platensis. Penambahan pupuk Azolla pinata kedalam media kultur menggunakan konsentrasi 3,5 ml menghasilkan populasi Spirulina platensis tertinggi sebesar 1708,6 x 103 unit/ml.

scholarly journals Growth of Spirulina platensis Cultured with Inorganic Fertilizer (Urea, TSP and ZA) and Chicken Manure

2007 ◽  
Vol 4 (1) ◽  
pp. 41 ◽  
Author(s):  
N.B.P Utomo ◽  
. Winarti ◽  
A. Erlina
Keyword(s):  
Population Growth ◽  
Spirulina Platensis ◽  
Crude Protein ◽  
Nutrient Content ◽  
The Other ◽  
Inorganic Fertilizer ◽  
Chicken Manure ◽  
Other Hand ◽  
Inorganic Medium ◽  
Population Maximum

<p>This experiment was conducted to compare the effectiveness of inorganic fertilizer and chicken manure on population growth and nutrient content of <em>Spirulina platensis</em>. It was found that <em>Spirulina platensis</em> cultured in inorganic medium reached a maximum population on day-9 with a density of 614.77x10<sup>3</sup> Sin/ml, containing 56.39% of crude protein and 17.92% of lipid. On the other hand, <em>Spirulina platensis</em> cultured in 250 ppm of chicken manure reached a maximum population on day-4 with a density of 434.32x10<sup>3 </sup>Sin/ml, containing 45.39% of crude protein and 12.50% of lipid.</p> <p>Keywords: spirulina, <em>Spirulina platensis</em>, culture, inorganic fertilizer, chicken manure, population maximum</p> <p> </p> <p>ABSTRAK</p> <p>Penelitian ini dilakukan untuk membandingkan efektivitas pupuk inorganik (urea, TSP dan ZA) dan kotoran ayam terhadap pertumbuhan dan kandungan nutrien <em>Spirulina platensis</em>.  Hasil penelitian menunjukkan bahwa <em>Spirulina platensis</em> dikultur menggunakan pupuk inorganik mencapai puncak populasi pada hari ke-9 dengan kepadatan 614,77x10<sup>3</sup> Sin/ml, mengandungkan protein kasar 56,39% dan lemak 17,92%. Sementara itu, <em>Spirulina platensis</em> dikultur menggunakan kotoran ayam 250 ppm mencapai puncak populasi pada hari ke-4 dengan kepadatan 434,32x10<sup>3</sup> Sin/ml, kandungan protein kasar 45,39% dan lemak 12,50%.</p> <p>Kata kunci: spirulina, <em>Spirulina platensis</em>, kultur, pupuk inorganik, kotoran ayam, populasi maksimal</p>

Light and oxygen stress in Spirulina platensis (cyanobacteria) grown outdoors in tubular reactors

1996 ◽  
Vol 97 (1) ◽  
pp. 175-179 ◽  
Author(s):  
Avigad Vonshak ◽  
Giuseppe Torzillo ◽  
Paola Accolla ◽  
Luisa Tomaselli
Keyword(s):  
Spirulina Platensis ◽  
Oxygen Stress ◽  
Tubular Reactors

Novel Approaches of Using of Spirulina Platensis in Natural Rubber Based Composites

2018 ◽  
Vol 6 (7) ◽  
pp. 680-687
Author(s):  
Ewa Głowińska ◽  
Janusz Datta ◽  
Paulina Parcheta and Natalia Kaźmierczak
Keyword(s):  
Natural Rubber ◽  
Spirulina Platensis ◽  
Novel Approaches

İstanbul İlçelerinin Nüfus Değişimi ve Kütük Bilgilerinin Analizi

2019 ◽  
Vol 6 (1) ◽  
pp. 37-72
Author(s):  
Ulaş Sunata ◽  
Dila Ergül
Keyword(s):  
Population Growth ◽  
Population Growth Rate ◽  
Population Change ◽  
Urban Migration ◽  
Specific Population ◽  
Related Factors ◽  
Internal Migrant ◽  
Level Analysis ◽  
Study District ◽  
Demographic Features

39 ilçesiyle Türkiye’nin en büyük nüfusuna sahip ili İstanbul aynı zamanda Türkiye’nin en çok iç göç alan şehridir. Özellikle kırdan kente göç bağlamında sosyo-ekonomik ve demografik özellikleriyle birçok araştırmaya konu olmuştur. Fakat İstanbul yerleşik nüfusunun Türkiye’nin diğer şehirlerine kayıtlı olma yoğunluğu da önemlidir. Bu çalışmanın amacı 2012 ve 2017 yıllarındaki nüfus değişimini göz önünde bulundurarak İstanbul ilçelerinin ayrıntılı nüfus yoğunluğu ve büyüme analizini yapmak, ilgili faktörleri değerlendirmek, hemşehri ağlarını okumak adına yerleşik nüfus kütük bilgileri bakımından inceleyerek elde edilen örüntüler doğrultusunda ilçe tipolojileri oluşturmaktır. Çalışmanın birinci bölümünde ilgili beş yıllık nüfus değişimlerine göre İstanbul ilçe nüfusları analiz edilmiştir. Ardından her bir ilçe için nüfusa kayıtlı olunan kente göre nüfus büyüme hızlarına bakılarak ilçelerin ağırlıklı olarak barındırdığı hemşehri ağları belirlenmiştir. İkinci bölümde ise ilçeler nüfus değişim özelliklerine göre belirli kategorilere ayrılmış ve bu kategoriler doğrultusunda ilçe tipolojileri oluşturulmuştur..ABSTRACT IN ENGLISHA District Level Analysis of Istanbul’s Population Change (2012-2017)Istanbul having the largest population of Turkey with its 39 districts is the most internal-migrant-receiving city in Turkey. Particularly in the context of rural-to-urban migration, Istanbul has been became a subject of various researches with its socio-economic and demographic features. However, the density of Istanbul’s settled population who registered other cities of Turkey is important. The main aim of this study is to analyse population growth of all districts considering the population change between 2012 and 2017, to evaluate the related factors and to develop a district typology by using the data of settled population according to their family registration in the name of reading the current countryman networks. In the first section of the study, district populations of Istanbul are examined regarding the related five-year change. Afterwards, most repeated countryman networks of all Istanbul’s districts are specified regarding the population growth rate of the registered cities. In the latter section of the study, districts were divided into categories regarding the specific population change features which help to create district typology.

Estimation of chlorophyll content by absorption spectra of native Spirulina platensis cells

2020 ◽  
pp. 25-33
Author(s):  
Leonid E. Paramonov
Keyword(s):  
Chlorophyll Content ◽  
Chlorophyll A ◽  
Absorption Spectra ◽  
Spirulina Platensis ◽  
Intracellular Concentration ◽  
Absorption Coefficients

A method for retrieving the absorption coefficients of Spirulina platensis pigments using absorption spectra of native cells and excluding the use of extracts is considered. Estimates of the intracellular concentration of chlorophyll a, С-phycoerythrin, С- phycocyanin and allophycocyanin in native cells are discussed.

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