نتایج جستجو برای: biomass productivity index

تعداد نتایج: 532745  

2016
Junying Zhu Weixian Chen Hui Chen Xin Zhang Chenliu He Junfeng Rong Qiang Wang

Nitrogen starvation is an efficient environmental pressure for increasing lipid accumulation in microalgae, but it could also significantly lower the biomass productivity, resulting in lower lipid productivity. In this study, green alga Chlorella sp. A2 was cultivated by using a minimal nitrogen supply strategy under both laboratory and outdoor cultivation conditions to evaluate biomass accumul...

2013
KEVIN E. MUELLER DAVID TILMAN DARIO A. FORNARA SARAH E. HOBBIE

The relationship between plant diversity and productivity in grasslands could depend, partly, on how diversity affects vertical distributions of root biomass in soil; yet, no prior study has evaluated the links among diversity, root depth distributions, and productivity in a long-term experiment. We used data from a 12-year experiment to ask how plant species richness and composition influenced...

2017
Aline Meireles dos Santos Karem Rodrigues Vieira Rafaela Basso Sartori Alberto Meireles dos Santos Maria Isabel Queiroz Leila Queiroz Zepka Eduardo Jacob-Lopes

The production of bioproducts from cyanobacteria with techno-economic feasibility is a challenge to these biotechnological processes. The choice of low-cost raw materials is of great importance for the overall economy of bioprocesses, as they represent a significant percentage in the final cost of the product. The objective of this work was to study the operational parameters of cultivation (ex...

2015
Masaki Muto Masayoshi Tanaka Yue Liang Tomoko Yoshino Mitsufumi Matsumoto Tsuyoshi Tanaka

BACKGROUND Microalgal oil is a promising alternative feedstock for biodiesel fuel (BDF). Mixotrophic cultivation with glycerol, the primary byproduct of BDF production, may be used to optimize BDF production. This strategy would reduce costs through glycerol recycling and improve lipid productivity and biomass productivity by overcoming the growth retardation caused by decreased light penetrati...

2013
David A. Roberts Rocky de Nys Nicholas A. Paul

The energy, mining and mineral processing industries are point sources of metal-contaminated waste water and carbon dioxide (CO2). Freshwater macroalgae from the genus Oedogonium can be grown in metal-contaminated waste water to generate biomass for bioenergy applications and concomitantly bioremediate metals. However, interactions between CO2 addition and algal growth, which can affect bioreme...

2013
Liangjun HU Qinfeng GUO

How species diversity relates to productivity remains a major debate. To date, however, the underlying mechanisms that regulate the ecological processes involved are still poorly understood. Three major issues persist in early efforts at resolution. First, in the context that productivity drives species diversity, how the pathways operate is poorly-explained. Second, productivity per se varies ...

Journal: :journal of industrial engineering, international 2010
gh tohidi sh razavyan s tohidnia

in some situations the producers desire to maximize total profit of decision making units (dmus) while the inputs and outputs prices of dmus change from one time period to another. in this paper, the researchers develop productivity index when producers are going to maximize total profit when the price of inputs and outputs are known.the proposed method uses all price information about inputs a...

Journal: :ecopersia 0
behnaz attaeian assistant professor, department of range and watershed management, faculty of natural resource and environmental sciences, malayer university, malayer, iran

ongoing climate change has been a major global challenge since the 1880s. sequestration of carbon(c) in rangelands ecosystems could provide a net carbon sink to offset increases in atmospheric c in global scale. this research is aimed at estimating the above-ground biomass carbon sequestration potential in iran. for this purpose, total rangelands area and productivity data were extracted from t...

2009
Seung-Chul Yoon Richard B. Russell Chi Thai

Three-dimensional (3D) measurements of whole plants may provide detailed structure information about plant health and also complement existing X-ray systems for the below-ground part. In addition to this structure characterization of plants, spectral information may also biochemically characterize plants' health. A stereo vision technique is a cost-effective and rapid imaging technique for meas...

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