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"Telah dilakukan penelitian untuk mengetahui pengaruh pemberian alga cokelat (Sargassum) dalam ransum terhadap pertumbuhan dan sintasan ikan nila srikandi (Oreochromis aureus x O. niloticus) yang dipelihara dengan sistem akuaponik. Terdapat 4 perlakuan dan 3 ulangan. P0 yang diberi pakan tanpa campuran Sargassum, kelompok P1 yang diberi pakan dengan campuran Sargassum 2%, kelompok P2 yang diberi pakan dengan campuran Sargassum 4%, dan kelompok P3 yang diberi pakan dengan campuran Sargassum 6%. Hasil uji anava satu faktor (P > 0,05) menunjukkan tidak adanya pengaruh nyata pemberian Sargassum terhadap pertumbuhan dan sintasan pada semua kelompok perlakuan.

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The research was done to observe the effect of brown algae (Sargassum) in the ration on the growth and survival of Srikandi tilapia (Oreochromis aureus x O. niloticus) were maintained aquaponics system. There are 4 treatments and 3 replication. P0 mixture fed without Sargassum, P1 group fed with a mixture of 2% Sargassum, P2 group fed with a mixture of Sargassum 4%, and the P3 group fed with Sargassum mixture of 6%. The feed is given three times daily for 8 weeks. The result anova test (P > 0.05) showed no significant effect on the survival and provision of Sargassum growth in all treatment groups."

"Microalgae has high nutritional value and are used to feed adult and larval stages of bivalves, the larvae of some fish and crustaceans and zooplankton. However, microalgae production for aquaculture animal is very expensive. To overcome this, the use of preserved microalgae such as algae concentrate and dried algae, or algal substitutes has been developed. There are both advantages and disadvantages to this alternative food. For example, even though the cost production for algal substitute yeast-based diet is cheaper, their nutritional value is much lower compared to fresh microalgae. Moreover, there is no significant difference in nutritional value between preserved (concentrated or dried) and fresh microalgae; however, preserving microalgae for long periods will affect their nutritional value. In spite of this problem, preserved microalgae such as algal concentrate and dried algae seem to be more effective to feed bivalves than algal substitutes yeast based diet due to their availability and relatively high nutritional value. Furthermore, algae concentrates are more suitable to replace fresh algae than dried algae. "

"Desain pembuatan danau UT di samping sebagai tempat resapan air, wahan rekreasi, sarana olahraga, juga merupakan habitat penting bagi tumbuhan dan hewan air (golongan alga sampai jenis vertebrata). Informasi mengenai data mikroalga serta kondisi fisik dan kimiawi lingkungan danau UT belum diketahui sehingga perlu dilakukan penelitian. Tujuan penelitian untuk mengukur kekayaan mikroalga, keanekaragaman mikroalga, dan kondisi lingkungan fisik dan kimiawi. Metode yang digunakan adalah mengidentifikasi setiap jenis dan menghitung jumlah individu mikroalga, serta menganalisis kualitas air. Hasil pengukuran kecerahan air danau dikatakan relatif keruh (52-60 cm). Pengukuran suhu air menunjukkan besaran angka 31-31,5 derajat celcius, kisaran suhu tersebut baik bagi pertumbuhan mikroalga. Nilai derajat keasaman air adalah 7,3-7,5 , sedangkan hasil pengukuran DO sebesar 0,5-0,57 mg/L. Kekayaan mikroalga yang teridentifikasi di danau UT sebanyak 21 genus ditemukan di empat stasiun dengan total populasi 4.080 individu/mm3. Persentase jumlah individu terbanyak adalah Scenedesmus sp. Indeks kekayaan jenis termasuk kategori sedang (3,33). kepadatan individu tertinggi ditemukan di stasiun-2 (bagian tengah) sebesar 4.651 individu/Liter, selanjutnya diikuti oleh stasiun-3 dari tepi danau sampai tepi gasebo (2.218 individu/Liter), stasiun-1 di bagian tepi danau (2.025 individu/Liter), dan stasiun-4 di bagian keluaran air (1.193 individu/Liter). Indeks biodiversitas jenis cukup rendah yaitu 2,107. "

"Alga coklat (S. polycystum) yang diekstraksi dengan berbagai macam pelarut diketahui memiliki aktivitas sitotoksik pada sel kanker kolon HCT-116. Nilai IC-50 paling baik ditunjukkan pada alga coklat (S. polycystum) yang diekstraksi menggunakan pelarut etil asetat. Penelitian ini bertujuan untuk membuktikan efek ekstrak alga coklat (S. polycystum) dalam menghambat kolitis terkait kanker kolon secara in vivo. Sebanyak 30 ekor mencit jantan galur Balb/C dibagi acak dalam 5 kelompok yaitu normal, negatif, dosis 1 (18 mg/kgBB), dosis 2 (90 mg/kgBB), dosis 3 (450 mg/kgBB). Hewan model dibuat dengan mengadministrasikan Dekstran Sodium Sulfat (DSS) selama 24 hari secara berturut-turut dengan konsentrasi 2% selama 7 hari, konsentrasi 1% selama 10 hari, dan konsentrasi 2% selama 7 hari. Pemberian ekstrak alga coklat (S. polycystum) diberikan pada hari ke-8 berlanjut hingga 14 hari setelah induksi. Selama penelitian berlangsung dilakukan pengukuran berat badan hewan, kemampuan bertahan hidup, dan penilaian Disease Activity Index (DAI). Setelah pengorbanan hewan dilakukan isolasi kolon untuk mengukur panjang, berat kolon, kerusakan jaringan, jumlah sel goblet dengan metode histopatologi kolon serta analisis ekspresi Caspase-3 pada jaringan kolon menggunakan metode ELISA. Hasil penelitian menunjukkan bahwa ekstrak alga coklat (S. polycystum) pada dosis 1 (18 mg/kgBB), menunjukkan perbaikan kerusakan jaringan kolon paling optimal dan memiliki konsentrasi Caspase-3 paling tinggi dibandingkan kelompok dosis lainnya.

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Brown algae (S. polycystum) extracted with various solvents is known to have cytotoxic activity on HCT-116 colon cancer cells. IC-50 value is best shown in brown algae (S. polycystum) extracted using ethyl acetate solvent. This study aims to prove the effect of brown algae extract (S. polycystum) in inhibiting colitis associated with colon cancer in vivo. Thirty male mice Balb/C strain were randomly divided into 5 groups: normal, negative, dose 1 (18 mg/kgBB), dose 2 (90 mg/kgBB), dose 3 (450 mg/kgBB). Animal models were made by administering Dextran Sodium Sulphate (DSS) for 24 consecutive days with a concentration of 2% for 7 days, 1% concentration for 10 days, and 2% concentration for 7 days. Brown algae extract (S. polycystum) was given on the 8th day and continued until 14 days after induction. During the study, animal body weight, survival ability, and Disease Activity Index (DAI) were measured. After animal sacrifice, colon isolation was carried out to measure the length, weight of the colon, tissue damage, number of goblet cells using the colon histopathology method and analysis of Caspase-3 expression in colon tissue using the ELISA method. The results showed that brown algae extract (S. polycystum) at dose 1 (1.8 mg/kg BW) showed the most optimal colonic damage improvement and had the highest concentration of Caspase-3 compared to the other dose groups."

"ABSTRAKMinyak alga Botryococcus braunii merupakan sumber energi terbarukan. Kandungan minyak pada alga ini mencapai 75% biomassa keringnya. Kondisi pengekstrakan yang optimal dibutuhkan untuk mendapatkan minyak yang maksimal. Telah dilakukan penelitian tentang pengekstrakan minyak alga ini dengan metode sonikasi. Pelarut yang dicoba adalah air, n-hexane, methanol dan alkohol. Sedangkan, frekuensi sonikasi yang dipakai adalah + 40 kHz. Waktu sonikasi divariasikan pada saat proses ekstraksi, yaitu 15, 30 dan 45 menit. Hasilnya, pelarut yang bisa menghasilkan minyak adalah n-hexane, methanol dan alkohol. Minyak yang dihasilkan n-hexane sebesar 3%. Sedangkan dengan methanol, minyak yang didapatkan sebesar 21.25%. Untuk variasi waktu sonikasi 15, 30 dan 45 menit dengan pelarut methanol, minyak yang didapatkan adalah 21.25%, 13.75% dan 7.5%.

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ABSTRACTOil from the Botryococcus braunii algae is a renewable energy source. Oil content in this algae can reach 75% of its dry biomass. Optimal extraction conditions are required in order to obtain the maximum oil content. Research on algae oil extraction using sonication is done using distilled water, n-hexane, methanol and alcohol as solvents. Meanwhile, the sonication frequency used is + 40 kHz. Sonication time is varied during the extraction process, with 15-, 30-, and 45- minute intervals used. The results find that the solvents that can produce algae oil are n-hexane, methanol and alcohol. Oil yielded by the n-hexane solvent amounts to 3%. While with methanol, the amount of oil obtained is 21.25%. For sonication time variation with methanol solvent, the amount of oil obtained using 15-, 30-, and 45-minute intervals are 21.25%, 13.75% and 7.5% respectively"

"Kultivasi alga selain dapat mereduksi CO2, juga menghasilkan produk biomassa yang bermanfaat. Dalam memproduksi biomassa Chlorella di dalam suatu fotobioreaktor, dibutuhkan parameter hidrodinamika yang benar agar didapat hasil biomassa yang optimal. Dalam penelitian ini dilakukan pemodelan dan simulasi fotobioreaktor kolom gelembung untuk kultivasi alga Chlorella. Pola aliran untuk fasa gas dan fasa cair dimodelkan dengan menggunakan konsep dispersi dengan mempertimbangkan konveksi, difusi, lapisan batas dan laju perpindahan massa antarfasa.Simulai menggunakan program dilakukan guna mengetahui pengaruh dari parameter hidrodinamika terhadap konsentrasi alga. Hasil simulasi menunjukkan bahwa semakin tinggi reaktor kolom gelembung mengakibatkan turunya hold up fasa gas dan kenaikan koefisien perpindahan massa. Berbeda dengan laju superfisial gas umpan, semakin besar laju superfisial gas umpan hold up fasa gas meningkat dan terjadi penurunan koefisien perpindahan massa.

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Cultivation of algae in addition to reducing CO2, biomass also produces useful products. In producing Chlorella biomass in a photobioreactor, the correct hydrodynamic parameters required in order to obtain optimal biomass yield. This research is modeling and simulating a bubble column photobioreactor for the cultivation of algae Chlorella. Flow regim for gas phase and liquid phase are modeled by using the concept of dispersion taking into account convection, diffusion, boundary layer and mass transfer rate.

Simulations using program was conducted to determine the effect of hydrodynamic parameters on the concentration of algae. Simulation results show that the higher the resulting bubble column reactor hold downs and rise up the gas phase mass transfer coefficient. Unlike the superficial gas feed rate, where the greater the rate of superficial feed gas hold up increased gas phase and a decrease in the mass transfer coefficient. "

"[ABSTRAKDi beberapa negara, perkembangan bioteknologi telah meluncurkan produk pangan yang dikenal dengan makanan kesehatan. Dimana mikroalga saat ini dapat dijual dalam bentuk kapsul atau di dalam makanan seperti aneka minuman dan pasta yang telah menunjukkan khasiat pengobatan dalam perlakuan kondisi seperti hiperkolesterolemia dan aterosklerosis. Penelitian ini bertujuan untuk mengetahui kadar protein pada mikroalga Botryococcus braunii dengan variasi spektrum cahaya tampak dengan metode Biuret. Hasil kadar protein untuk variasi spektrum cahaya tampak adalah dengan cahaya langsung 17,60 % , pemberian cahaya merah 13,48 % dan pemberian cahaya biru 11,82 %. Asam amino tertinggi yang dimiliki B.braunii baik sampel A, sampel B dan sampel C adalah Leusin/Leucine untuk asam amino esensial dan Alanin/Alanine untuk asam amino non esensial. Pada penelitian ini juga dapat didapatkan metode nilai kapasitansi lebih relevan dibandingkan metode absorbansi untuk melihat pertumbuhan mikroalga B. braunii.ABSTRACTIn some countries, the development of biotechnology has launched a food product known as health food. Now microalgae can be sold in capsule or in foods such as drinks and pasta that has shown efficacy in the treatment of treatment of conditions such as hypercholesterolemia and atherosclerosis. This study aims to determine levels of protein in microalgae Botryococcus braunii with variations in the visible light spectrum with Biuret method. Results for the protein content of the visible light spectrum variation is 17.60% for direct light, 13.48% for giving the red light and 11.82% for blue light giving. The highest amino acid B.braunii owned both the sample A, sample B and sample C is Leucine for amino acids essential and Alanine for non-essential amino acids. In this study, can also be obtained capacitance value method is more relevant than the absorbance method to see the growth of microalgae B. braunii.;In some countries, the development of biotechnology has launched a food product known as health food. Now microalgae can be sold in capsule or in foods such as drinks and pasta that has shown efficacy in the treatment of treatment of conditions such as hypercholesterolemia and atherosclerosis. This study aims to determine levels of protein in microalgae Botryococcus braunii with variations in the visible light spectrum with Biuret method. Results for the protein content of the visible light spectrum variation is 17.60% for direct light, 13.48% for giving the red light and 11.82% for blue light giving. The highest amino acid B.braunii owned both the sample A, sample B and sample C is Leucine for amino acids essential and Alanine for non-essential amino acids. In this study, can also be obtained capacitance value method is more relevant than the absorbance method to see the growth of microalgae B. braunii., In some countries, the development of biotechnology has launched a food product known as health food. Now microalgae can be sold in capsule or in foods such as drinks and pasta that has shown efficacy in the treatment of treatment of conditions such as hypercholesterolemia and atherosclerosis. This study aims to determine levels of protein in microalgae Botryococcus braunii with variations in the visible light spectrum with Biuret method. Results for the protein content of the visible light spectrum variation is 17.60% for direct light, 13.48% for giving the red light and 11.82% for blue light giving. The highest amino acid B.braunii owned both the sample A, sample B and sample C is Leucine for amino acids essential and Alanine for non-essential amino acids. In this study, can also be obtained capacitance value method is more relevant than the absorbance method to see the growth of microalgae B. braunii.]"