Response of Maize to Different Soil Residual Phosphorus Conditions

2019 ◽  
Vol 111 (6) ◽  
pp. 3291-3300 ◽  
Author(s):  
Luiz E. Zancanaro Oliveira ◽  
Rafael de S. Nunes ◽  
Djalma M. G. Sousa ◽  
Jader G. Busato ◽  
Cícero C. Figueiredo
Keyword(s):  
Residual Phosphorus

COPPER ALLOY No. 120

Alloy Digest ◽  
1972 ◽  
Vol 21 (12) ◽  
Keyword(s):  
Electrical Conductivity ◽  
Corrosion Resistance ◽  
Shear Strength ◽  
Physical Properties ◽  
Tensile Properties ◽  
Copper Alloy ◽  
Heat Treating ◽  
Residual Phosphorus ◽  
Low Level

Abstract COPPER No. 120 is a phosphorus deoxidized copper in which the residual phosphorus is maintained at a low level to acheive a good electrical conductivity. This datasheet provides information on composition, physical properties, hardness, elasticity, tensile properties, and shear strength as well as fatigue. It also includes information on corrosion resistance as well as forming, heat treating, machining, and joining. Filing Code: Cu-263. Producer or source: Copper and copper alloy mills.

Phosphorus‐induced Zinc Deficiency in Wheat on Residual Phosphorus Plots 1

1986 ◽  
Vol 78 (4) ◽  
pp. 668-675 ◽  
Author(s):  
J. P. Singh ◽  
R. E. Karamanos ◽  
J. W. B. Stewart
Keyword(s):  
Zinc Deficiency ◽  
Residual Phosphorus

scholarly journals Enzymatic Degumming of Rice Bran Oil Using Different Commercial Phospholipases and Their Cocktails

Life ◽  
2021 ◽  
Vol 11 (11) ◽  
pp. 1197
Author(s):  
Mayara S. Rodrigues ◽  
Rafaela M. Dos Passos ◽  
Paula V. de A. Pontes ◽  
Marcela C. Ferreira ◽  
Antonio J. A. Meirelles ◽  
...  
Keyword(s):  
Fatty Acid ◽  
Free Fatty Acid ◽  
Vegetable Oil ◽  
Rice Bran ◽  
Phosphorus Content ◽  
Rice Bran Oil ◽  
Reaction Times ◽  
Oil Refining ◽  
Residual Phosphorus ◽  
Enzymatic Degumming

Rice bran oil is a highly nutritious vegetable oil, as it is rich in tocols and γ-oryzanol. Degumming is the first step in the vegetable oil refining process, and its main objective is the removal of phospholipids or gums. In the present study, enzymatic degumming trials were performed on crude rice bran oil using the phospholipases PLA1, Purifine® PLC, their mixture (PLA1/PLC), and a cocktail known as Purifine® 3G. Enzymatic degumming applying 50 mg/kg of PLA1 for 120 min resulted in a residual phosphorus content of 10.4 mg/kg and an absolute free fatty acid increase of 0.30%. Enzymatic degumming applying 300 mg/kg of Purifine® PLC for 120 min at 60 °C resulted in a residual phosphorus content of 67 mg/kg and an absolute diacylglycerol increase of 0.41%. The mixture of phospholipases and the cocktail presented approximately 5 mg/kg of residual phosphorus content after the reaction times. For all degumming processes, the preservation of minor components such as tocols and γ-oryzanol were observed. These results indicate that the use of enzyme mixtures or their cocktails to attain low phosphorus content and high diacylglycerol/free fatty acid conversion during enzymatic degumming is a viable alternative.

scholarly journals Kinetic Study of the Recovery of Phosphorus from Wastewater by Calcium Hydroxide Solution

2019 ◽  
Vol 25 (6) ◽  
pp. 19-29
Author(s):  
Shams Asem Mahdi ◽  
Raghad Fareed Qasim
Keyword(s):  
Oxalic Acid ◽  
Calcium Hydroxide ◽  
Phosphorus Concentration ◽  
Ambient Conditions ◽  
Residual Phosphorus ◽  
Mixing Speed ◽  
Dissolution Reaction ◽  
Best Value ◽  
Percentage Removal ◽  
Kinetics Of

This research presents a study for precipitating phosphorus (as phosphate ion) from simulated wastewater (5ppm initial concentration of phosphorus) using calcium hydroxide Ca(OH)2 solution. The removal of phosphorus by Ca (OH)2 solution is expected to be very effective since the chemical reaction is of acid-base type but Ca(OH)2 forms complex compound with phosphate ions called. Hydroxyapatite Ca5 (PO4)3OH. hydroxyapatite is slightly soluble in water. This research was directed towards sustainable elements as phosphorus. Kinetics of the dissolution reaction of hydroxyapatite was investigated to find the best factors to recover phosphorus. The effect of concentration of Ca(OH)2 (180- 380 ppm) on phosphorus precipitation on the outputs like the residual phosphorus concentration in the simulated solution, the percentage removal of phosphorus and the weight of the precipitate was also studied. The residual phosphorus decreased with increasing Ca(OH)2 concentration while the percentage removal, as well as the weight of the precipitate, increased with increasing Ca(OH)2 concentration at constant temperature and mixing speed. The best Ca(OH)2 concentration was obtained depending on the lowest amount of the residual phosphorus concentration. The best value obtained was 230 ppm at a fixed mixing speed of 400 rpm and a temperature of 20°C.  The best value for Ca(OH)2 concentration under fixed stirring speed and temperature was applied on a real wastewater taken from the detergent factory. The percentage removal was 30. 69% due to the complexity of the real sample. Oxalic acid was chosen to dissolve hydroxyapatite because it is an organic acid, less hazardous than mineral acids and of less cost. Kinetics of the dissolution reaction of hydroxyapatite in (160 ppm) concentration oxalic acid under ambient conditions (20°C and 1 atm (and mild stirring (200 rpm) was studied using the differential method for determining the order of the reaction which was 0.4296 and the rate constant 0.0743 (L/mg)-0.5704. min-1. The reaction was considered as a rate-controlled reaction.  

KME Cu-DHP

Alloy Digest ◽  
2021 ◽  
Vol 70 (8) ◽  
Keyword(s):  
Electrical Conductivity ◽  
Corrosion Resistance ◽  
Hydrogen Embrittlement ◽  
Physical Properties ◽  
Tensile Properties ◽  
Phosphorus Content ◽  
Heat Treating ◽  
Bend Strength ◽  
Residual Phosphorus ◽  
High Phosphorus Content

Abstract KME Cu-DHP is a phosphorus-deoxidized copper that contains a minimum of 99.90% copper and high residual phosphorus. The electrical conductivity of this type of copper is relatively low on account of the high phosphorus content. KME Cu-DHP possesses very good formability and joining properties and is resistant against hydrogen embrittlement. This datasheet provides information on composition, physical properties, hardness, elasticity, tensile properties, and bend strength. It also includes information on corrosion resistance as well as forming, heat treating, machining, and joining. Filing Code: Cu-923. Producer or source: KME Germany GmbH.

CROP RESPONSE TO LIME AND FERTILIZER SUPERIMPOSED ON DIFFERENT TILLAGE TREATMENTS FOR A VIRGIN GREY WOODED SOIL

1963 ◽  
Vol 43 (2) ◽  
pp. 298-308
Author(s):  
Herman A. Hamilton ◽  
J. R. Lessard
Keyword(s):  
Surface Soil ◽  
The Other ◽  
First Year ◽  
Crop Response ◽  
Nitrogen And Phosphorus ◽  
Residual Phosphorus ◽  
Second Year ◽  
Tillage Treatment ◽  
Nitrogen Phosphorus ◽  
Forage Yields

A virgin Grey Wooded soil was subjected to different tillage treatments receiving various rates of nitrogen, phosphorus and lime. In a 5-year rotation of oats followed by 4 years of hay, oat forage yields with 24-inch plowing appeared to be less than those obtained with shallower tillage treatments, but the subsequent first- and second-year hay yields were substantially higher. Nitrogen and phosphorus significantly increased oat forage yields irrespective of tillage treatment. Increases in first-year hay yields due to residual phosphorus were highly significant with 12-inch and 24-inch plowing. Second-year hay yields were significantly increased by residual phosphorus on all tillage treatments with increases being in the order 12-inch plowing and disking greater than 6-inch and 24-inch plowing. Irrespective of tillage treatment, lowest hay yields were obtained in the first year of harvest. Despite the greater saturation of the sub-surface soil with bases, lime significantly increased hay yields on plots plowed to 24 inches. Whereas the legume component of the hay mixture was initially high on plots plowed to 24 inches, in the succeeding years the percentage decreased considerably. On the other hand, legume percentage, which was initially low, increased for plots that were disked or plowed to 6 inches. Plowing to a depth of 12 inches appeared to be the most satisfactory procedure in maintaining the best hay yields with a high percentage of legumes.

RESIDUAL PHOSPHORUS SOLUBILITY FOR AN ACID, CLAYEY, FORESTED SOIL IN THE PRESENCE OF OXALATE AND CITRATE

1989 ◽  
Vol 69 (1) ◽  
pp. 111-117 ◽  
Author(s):  
N. B. COMERFORD ◽  
M. F. SKINNER
Keyword(s):  
Key Words ◽  
Pinus Radiata ◽  
Clayey Soil ◽  
Organic Anion ◽  
Sorption Isotherms ◽  
Organic P ◽  
Soil Material ◽  
Residual P ◽  
Residual Phosphorus ◽  
P Sorption

A highly weathered, clayey soil was sampled 14 yr after a Pinus radiata stand was broadcast fertilized with 0, 50 and 200 kg P ha−1 as ordinary superphosphate. Incremental loadings of oxalate and citrate anions from 10 to 100 μmol of anion g−1 soil were evaluated for increased soluble, reactive P (SRP) and soluble, nonreactive (SNP) P. Sorption isotherms were compared to evaluate the effect of the previous fertilization on P sorption by the soil material sampled, and also to measure SNP displacement by orthophosphate-P. A portion of the SNP pool was more readily released than SRP and orthophosphate displaced a significant amount of SNP. After 14 yr the effect of fertilization was still obvious in the sampled soil material. Much of the organic anion-soluble P was in the SRP form. Key words: Citrate, organic P, orthophosphate, oxalate, Pinus radiata, residual P

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