Yield and Quality Improvements for Semi-Continuously Cast Copper Alloys

Agricultural Price, Quantity, and Welfare Effects of Air Quality Improvements

Northeastern Journal of Agricultural and Resource Economics ◽

10.1017/s0899367x00001264 ◽

1986 ◽

Vol 15 (1) ◽

pp. 1-5

Author(s):

Marc Ribaudo ◽

James Shortle

Keyword(s):

Air Quality ◽

Air Pollutants ◽

Partial Equilibrium ◽

Quality Improvements ◽

Yield And Quality ◽

Partial Equilibrium Model ◽

Air Quality Improvement ◽

Welfare Implications ◽

Agricultural Price

The failure to allow for significant crop quality effects in a partial-equilibrium model can lead to misleading inferences about the price, output and welfare implications of air quality improvements. It has been observed that air pollutants such as ozone, sulphur dioxide, and nitrogen dioxide affect the yield and quality of many crops. The economic benefit from improving air quality in crop producing regions has been measured using a partial-equilibrium approach which accounts only for supply shifting yield effects. It is shown that a yield-effect only model will underestimate output increases and benefits from an air quality improvement when commodity quality improvements as well as yield increases are forthcoming.

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Producing Enhanced Yield and Nutritional Pigmentation in Lollo Rosso Through Manipulating the Irradiance, Duration, and Periodicity of LEDs in the Visible Region of Light

Frontiers in Plant Science ◽

10.3389/fpls.2020.598082 ◽

2020 ◽

Vol 11 ◽

Author(s):

Laura Cammarisano ◽

Iain S. Donnison ◽

Paul R. H. Robson

Keyword(s):

Visible Region ◽

High Energy ◽

Anthocyanin Content ◽

Quality Improvements ◽

Fresh Weight ◽

Beneficial Effects ◽

Yield And Quality ◽

Asymptotic Energy ◽

Anthocyanin Production ◽

Test Optimization

Pigmented food are an important part of the human diet, and anthocyanins have demonstrable protection against tumor production in mouse models and beneficial effects on human liver chemistry. As such, producing pigmented crops is important for a nutritionally diverse diet. Lollo rosso lettuce is a fast-growing pigmented plant, is rich in phenolic compounds, and represents a suitable system to test optimization strategies for yield and anthocyanin production. High-energy UV wavebands are often used to stimulate increased pigmentation; however, we hypothesized that optimizing visible wavebands would deliver both yield and quality improvements. Growing Lollo rosso under irradiances between 5 and 180 W m–2 using visible waveband LEDs produced 0.4 g fresh weight per W m–2 in the linear portion of the curve between 5 and 40 W m–2 and achieved an approximate asymptote of 20 g fresh weight at around 100–120 W m–2 for yield. Anthocyanin content increased linearly with irradiance. We attempted to optimize the visible wavebands by supplementing half the asymptotic energy for 15 days with supplemental red (R) or blue (B) wavebands in the peaks of photosynthetic activity (430–460 and 630–660 nm). R and B affected rosette morphology with no significant impact on yield, but B significantly increased anthocyanin content by 94% compared to R. We therefore focused on further optimizing B by shortening the daily duration of supplemental B. The minimum B treatment that lacked significant pigment induction was 1 h. We hypothesized that short durations would be more active at different times in the diurnal cycle. Supplemental B was applied for 2 h at four different times. A night-break with B produced the highest yield and anthocyanin content. Our research demonstrates new ways to efficiently use readily available LEDs within the PAR wavebands to increase both yield and crop quality in controlled environment agriculture.

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Quality assurance continuously cast of hollow preparation of copper alloys

Eastern-European Journal of Enterprise Technologies ◽

10.15587/1729-4061.2014.21089 ◽

2014 ◽

Vol 1 (3(67)) ◽

pp. 16

Author(s):

Анна Алексеевна Павлова ◽

Олег Николаевич Хорошилов

Keyword(s):

Quality Assurance ◽

Copper Alloys ◽

Continuously Cast

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Oil palm: future prospects for yield and quality improvements

Lipid Technology ◽

10.1002/lite.200900067 ◽

2009 ◽

Vol 21 (11-12) ◽

pp. 257-260 ◽

Cited By ~ 25

Author(s):

Denis J. Murphy

Keyword(s):

Oil Palm ◽

Quality Improvements ◽

Future Prospects ◽

Yield And Quality

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Morphology and atomic structure of segregated grain boundaries in Cu-Sb

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100121673 ◽

1992 ◽

Vol 50 (1) ◽

pp. 254-255

Author(s):

R. W. Fonda ◽

D. E. Luzzi

Keyword(s):

Grain Boundary ◽

Grain Boundaries ◽

Intergranular Fracture ◽

Atomic Structure ◽

Copper Alloys ◽

Polycrystalline Materials ◽

Grain Boundary Embrittlement ◽

Boundary Embrittlement

The properties of polycrystalline materials are strongly dependant upon the strength of internal boundaries. Segregation of solute to the grain boundaries can adversely affect this strength. In copper alloys, segregation of either bismuth or antimony to the grain boundary will embrittle the alloy by facilitating intergranular fracture. Very small quantities of bismuth in copper have long been known to cause severe grain boundary embrittlement of the alloy. The effect of antimony is much less pronounced and is observed primarily at lower temperatures. Even though moderate amounts of antimony are fully soluble in copper, concentrations down to 0.14% can cause grain boundary embrittlement.

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TEM study of a biofilm on copper corrosion

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100163563 ◽

1996 ◽

Vol 54 ◽

pp. 220-221

Author(s):

W. A. Chiou ◽

N. Kohyama ◽

B. Little ◽

P. Wagner ◽

M. Meshii

Keyword(s):

Marine Bacterium ◽

Culture Medium ◽

Copper Alloys ◽

Pure Copper ◽

Localized Corrosion ◽

Natural Seawater ◽

Copper Corrosion ◽

New Approach ◽

The Past ◽

Copper Tolerant

The corrosion of copper and copper alloys in a marine environment is of great concern because of their widespread use in heat exchangers and steam condensers in which natural seawater is the coolant. It has become increasingly evident that microorganisms play an important role in the corrosion of a number of metals and alloys under a variety of environments. For the past 15 years the use of SEM has proven to be useful in studying biofilms and spatial relationships between bacteria and localized corrosion of metals. Little information, however, has been obtained using TEM capitalizing on its higher spacial resolution and the transmission observation of interfaces. The research presented herein is the first step of this new approach in studying the corrosion with biological influence in pure copper.Commercially produced copper (Cu, 99%) foils of approximately 120 μm thick exposed to a copper-tolerant marine bacterium, Oceanospirillum, and an abiotic culture medium were subsampled (1 cm × 1 cm) for this study along with unexposed control samples.

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