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192.820  Articles
1 of 19.282 pages  |  10  records  |  more records»
The increasing penetration of renewable sources with power-electronic interfaces in power systems is raising technical problems and the overall efficiency of photovoltaic systems can decrease dramatically. In this context, the optimal layout for the photo... see more

Simulation studies for a PV system would be useful for planning before real implementation, and to predict the cost for a large scale PV system. This work is to simulate a 3 kWp rooftop photovoltaic (PV) system under the climate of Surabaya, Indonesia. So... see more

Simulation studies for a PV system would be useful for planning before real implementation, and to predict the cost for a large scale PV system. This work is to simulate a 3 kWp rooftop photovoltaic (PV) system under the climate of Surabaya, Indonesia. So... see more

In manual maintenance inspections of large-scaled photovoltaic (PV) or rooftop PV systems, several days are required to survey the entire PV field. To improve reliability and shorten the amount of time involved, this study proposes an electrical examinati... see more

The rapid development of renewable energy calls for feasible and reliable technologies to transmit and integrate power into grids. Voltage Source Converter (VSC)- Direct Current (DC) technology is considered as a promising solution for its independent con... see more

KAROTENOID DARI MAKROALGAE DAN MIKROALGAE: POTENSI KESEHATAN APLIKASI DAN BIOTEKNOLOGI [Carotenoids from Macroalgae and Microalgae: Health Potential, Application and Biotechnology] Helly de Fretes1)*, AB. Susanto2), Budhi Prasetyo1) dan Leenawaty Limantara3) 1) Magister Biologi, Universitas Kristen Satya Wacana, Salatiga 2) Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro, Tembalang, Semarang 3) Ma Chung Research Center for Photosynthetic Pigments, Universitas Ma Chung, Malang   Diterima 13 Desember 2011 / Disetujui 24 Mei 2012 SUMMARY   Algae, both micro and macroalgae, is one of the largest producers of carotenoids. The major composition of carotenoid on algae are ß-carotene, astaxanthin, luthein, zeaxanthin, cryptoxanthin, and fucoxanthin which have important roles for human health. Carotenoids were produced by several microalgae species such as Dunaliella sallina, Haemotococcus pluvialis, Chlorella pyrenoidosa, Spirulina platensis, Nannnochloropsis oculata, and also from some macroalgae species such as Kappaphycus alvarezii, Sargassum sp, and Caulerpa sp. Carotenoids from algae has been proven as a powerful antioxidant and may prevent some degenerative diseases, cardiovascular, and cancer. Carotenoid also has been applied as a natural dye and dietary supplements. Biotechnology has been developed to increase the production of carotenoids from micro- and macroalgae. The large-scale cultivation of microalgae, either in open or closed system are shown to increase carotenoid production. During cultivation, some stress conditions can be specifically manipulated to optimize carotenoid production from microalgae.   Keywords: application, biotechnology, carotenoid, macroalgae, microalgae SUMMARY   Algae, baik mikro maupun makroalgae, merupakan salah satu penghasil karotenoid terbesar. Komposisi karotenoid penting yang dikandung oleh mikroalgae dan makroalgae terdiri dari ß-karoten, astaxantin, lutein, zeaxantin, kriptoxantin, serta fukoxantin.Seluruhnya memiliki peranan bagi kesehatan manusia. Karotenoid-karotenoid tersebut diproduksi oleh beberapa spesies mikroalga yaitu Dunaliella sallina, Haemotococcus pluvialis, Chlorella pyrenoidosa, Anthrospira platensis, serta Nannnochloropsis oculata, dan juga beberapa spesies makroalga seperti Kappaphycus alvarezii, Sargassum sp, dan Caulerpa sp. Karotenoid dari algae telah terbukti sebagai antioksidan yang kuat serta dapat mencegah beberapa penyakit degeneratif, kardiovaskular, dan kanker. Karotenoid juga telah diaplikasikan sebagai pewarna dan suplemen makanan. Bioteknologi telah dikembangkan dalam rangkai peningkatan produksi karotenoid dari mikroalgae dan makroalgae. Selama kultivasi, beberapa kondisi stres dapat dimanipulasi secara khusus untuk mengoptimalkan produksi karotenoid dari mikroalgae.   Kata kunci: aplikasi, bioteknologi, karotenoid, makroalgae, mikroalgae

KAROTENOID DARI MAKROALGAE DAN MIKROALGAE: POTENSI KESEHATAN APLIKASI DAN BIOTEKNOLOGI [Carotenoids from Macroalgae and Microalgae: Health Potential, Application and Biotechnology] Helly de Fretes1)*, AB. Susanto2), Budhi Prasetyo1) dan Leenawaty Limantar... see more
KAROTENOID DARI MAKROALGAE DAN MIKROALGAE: POTENSI KESEHATAN APLIKASI DAN BIOTEKNOLOGI [Carotenoids from Macroalgae and Microalgae: Health Potential |  Application and Biotechnology] Helly de Fretes1)* |  AB. Susanto2) |  Budhi Prasetyo1) dan Leenawaty Limantara3) 1) Magister Biologi |  Universitas Kristen Satya Wacana |  Salatiga 2) Fakultas Perikanan dan Ilmu Kelautan |  Universitas Diponegoro |  Tembalang |  Semarang 3) Ma Chung Research Center for Photosynthetic Pigments |  Universitas Ma Chung |  Malang   |  Diterima 13 Desember 2011 / Disetujui 24 Mei 2012 SUMMARY   |  Algae |  both micro and macroalgae |  is one of the largest producers of carotenoids. The major composition of carotenoid on algae are ß-carotene |  astaxanthin |  luthein |  zeaxanthin |  cryptoxanthin |  and fucoxanthin which have important roles for human health. Carotenoids were produced by several microalgae species such as Dunaliella sallina |  Haemotococcus pluvialis |  Chlorella pyrenoidosa |  Spirulina platensis |  Nannnochloropsis oculata |  and also from some macroalgae species such as Kappaphycus alvarezii |  Sargassum sp |  and Caulerpa sp. Carotenoids from algae has been proven as a powerful antioxidant and may prevent some degenerative diseases |  cardiovascular |  and cancer. Carotenoid also has been applied as a natural dye and dietary supplements. Biotechnology has been developed to increase the production of carotenoids from micro- and macroalgae. The large-scale cultivation of microalgae |  either in open or closed system are shown to increase carotenoid production. During cultivation |  some stress conditions can be specifically manipulated to optimize carotenoid production from microalgae.   |  Keywords: application |  biotechnology |  carotenoid |  macroalgae |  microalgae SUMMARY   |  Algae |  baik mikro maupun makroalgae |  merupakan salah satu penghasil karotenoid terbesar. Komposisi karotenoid penting yang dikandung oleh mikroalgae dan makroalgae terdiri dari ß-karoten |  astaxantin |  lutein |  zeaxantin |  kriptoxantin |  serta fukoxantin.Seluruhnya memiliki peranan bagi kesehatan manusia. Karotenoid-karotenoid tersebut diproduksi oleh beberapa spesies mikroalga yaitu Dunaliella sallina |  Haemotococcus pluvialis |  Chlorella pyrenoidosa |  Anthrospira platensis |  serta Nannnochloropsis oculata |  dan juga beberapa spesies makroalga seperti Kappaphycus alvarezii |  Sargassum sp |  dan Caulerpa sp. Karotenoid dari algae telah terbukti sebagai antioksidan yang kuat serta dapat mencegah beberapa penyakit degeneratif |  kardiovaskular |  dan kanker. Karotenoid juga telah diaplikasikan sebagai pewarna dan suplemen makanan. Bioteknologi telah dikembangkan dalam rangkai peningkatan produksi karotenoid dari mikroalgae dan makroalgae. Selama kultivasi |  beberapa kondisi stres dapat dimanipulasi secara khusus untuk mengoptimalkan produksi karotenoid dari mikroalgae.   |  Kata kunci: aplikasi |  bioteknologi |  karotenoid |  makroalgae |  mikroalgae
It is well known that large scale multiple-input multiple-output (LS-MIMO) systems are very attractive technology to increase both spectral efficiency (SE) and energy efficiency (EE). However, one of big obstacles to the realization of the LS-MIMO system ... see more

Due to the continuous increase in data demanded by end-users, an energy-efficient base station (BS) is a vital topic of interest that would not only result in a substantial economic impact on service providers, but would also reduce the carbon footprint o... see more

The Heat Roadmap Europe (HRE) studies estimated a potential increase of the district heating (DH) share to 50% of the entire heat demand by 2050, with approximately 25–30% of it being supplied using large-scale electric heat pumps. This study builds on th... see more

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