EFFECTS OF P CONTENT ON (LAVES+γ) EUTECTIC REACTION DURING INCONEL 706 ALLOY SOLIDIFICATION

Experiments were conducted to study the genotypic variability for tolerance to combined stresses of low availability of phosphorus (P) and drought in 14 mungbean [Vigna radiata (L.) R. Wilczek] accessions. The accessions were evaluated under four conditions viz., control (sufficient P, irrigated), low P (without P, irrigated), drought (sufficient P, withholding irrigation) and combined stresses (low P, withholding irrigation). The relative stress tolerance was estimated for 22 agro-physiological traits. The principal component analysis (PCA) and relative stress indices (RSIs) of traits exhibited significant variation among the treatments and accessions. Based on RSIs, the PCA ranking analysis showed that the accessions IC 280489, PDM 139 and IC 76491 were highly ranked and tolerant to low P, drought and combined stresses. The relative increase in component traits such as photosynthetic parameters, relative water content, above-ground biomass, seed P content and number of pods plant–1 were higher while canopy temperature and water use efficiency were reduced in tolerant accessions. In contrast, IPM 2-3 was found to be relatively sensitive to all three treatments. Tolerant accessions may be either included in the breeding program or used directly as cultivar that can be grown under low P and drought.

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Faculty Opinions recommendation of Stoichiometry in an ecological context: testing for links between Daphnia P-content, growth rate and habitat preference.

Faculty Opinions – Post-Publication Peer Review of the Biomedical Literature ◽

10.3410/f.1023578.285730 ◽

2005 ◽

Author(s):

Robert Sterner

Keyword(s):

Growth Rate ◽

Habitat Preference ◽

Ecological Context ◽

P Content

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Bio-P and non-bio-P bacteria identification by a novel microbial approach

Water Science & Technology ◽

10.2166/wst.1999.0249 ◽

1999 ◽

Vol 39 (6) ◽

pp. 13-20 ◽

Cited By ~ 6

Author(s):

Philip L. Bond ◽

Jürg Keller ◽

Linda L. Blackall

Keyword(s):

In Situ Hybridisation ◽

Microbial Populations ◽

Biological Phosphorus Removal ◽

Gram Positive Bacteria ◽

P Content ◽

Identification Of Bacteria ◽

Widespread Belief ◽

Biological Phosphorus ◽

P Removal

Culturing bacteria from activated sludge with enhanced biological phosphorus removal (EBPR) has strongly implicated Acinetobacter with the process. However, using fluorescent in-situ hybridisation (FISH) probing to analyse microbial populations, we have shown evidence opposing this widespread belief. We describe the phosphorus (P) removing performance and microbial population analyses of sludges obtained in a laboratory scale EBPR reactor. Two sludges with extremely high P removing capabilities were examined, the P content of these sludges was 8.6% (P sludge) and 12.3% (S sludge) of the MLSS. Identification of bacteria using FISH probing indicated both sludges were dominated by microbes from the beta proteobacteria and high mol% G+C Gram positive bacteria. Acinetobacter could make up only a small proportion of the cells in these sludges. Sludge with extremely poor P removal (P content of 1.5%, referred to as T sludge) was then generated by reducing the P in the influent. Bacteria resembling the G-bacteria became abundant in this sludge and these were identified using FISH probing. The anaerobic transformations of the T and P sludges correlated well with that of the non-EBPR and EBPR biological models respectively, indicating that bacteria in the T sludge have the potential to inhibit P removal in EBPR systems.

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Sincerity and the Reliability of Testimony

10.1093/oso/9780198743965.003.0005 ◽

2018 ◽

Author(s):

Peter J. Graham

Keyword(s):

A Priori ◽

Prima Facie ◽

Tyler Burge ◽

P Content ◽

Epistemology Of Testimony ◽

Content Preservation

“Content Preservation” by Tyler Burge is one of the most influential articles in the epistemology of testimony. Burge argues for three theses: (1) That we enjoy a prima facie entitlement to take testimony (presentations-as-true) at face value, (2) That this entitlement has an a priori basis, based in the nature of reason, and (3) That in some cases testimony-based beliefs are warranted a priori. Most of the debate in the testimony literature is over the truth of (1). Most of the criticism of Burge’s paper focuses on (3). Burge has since abandoned (3). What about (2)? Burge’s argument for (2) is compressed; the underlying nuts and bolts are difficult to understand. This chapter reconstructs Burge’s overall teleo-functional reliabilist framework and then reconstructs Burge’s overall argument for (2) in some detail. Three criticisms are then offered of the argument. Even granting (1), Burge’s argument does not establish (2).

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Enhanced biological phosphorus removal process implemented in membrane bioreactors to improve phosphorous recovery and recycling

Water Science & Technology ◽

10.2166/wst.2003.0023 ◽

2003 ◽

Vol 48 (1) ◽

pp. 87-94 ◽

Cited By ~ 21

Author(s):

B. Lesjean ◽

R. Gnirss ◽

C. Adam ◽

M. Kraume ◽

F. Luck

Keyword(s):

Phosphorus Removal ◽

Theoretical Calculations ◽

Enhanced Biological Phosphorus Removal ◽

Biological Phosphorus Removal ◽

P Limitation ◽

Batch Tests ◽

P Content ◽

On Line ◽

Biological Phosphorus ◽

P Removal

The enhanced biological phosphorus removal (EBPR) process was adapted to membrane bioreactor (MBR) technology. One bench-scale plant (BSP, 200-250 L) and two pilot plants (PPs, 1,000-3,000 L each) were operated under several configurations, including pre-denitrification and post-denitrification without addition of carbon source, and two solid retention times (SRT) of 15 and 26 d. The trials showed that efficient Bio-P removal can be achieved with MBR systems, in both pre- and post-denitrification configurations. EBPR dynamics could be clearly demonstrated through batch-tests, on-line measurements, profile analyses, P-spiking trials, and mass balances. High P-removal performances were achieved even with high SRT of 26 d, as around 9 mgP/L could be reliably removed. After stabilisation, the sludge exhibited phosphorus contents of around 2.4%TS. When spiked with phosphorus (no P-limitation), P-content could increase up to 6%TS. The sludge is therefore well suited to agricultural reuse with important fertilising values. Theoretical calculations showed that increased sludge age should result in a greater P-content. This could not be clearly demonstrated by the trials. This effect should be all the more significant as the influent is low in suspended solids.

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