Determination of Calcium, Phosphorus and Potassium in Leaf Tissues by Extraction with Ethanol-Water Solvent

1990 ◽  
Vol 23 (12) ◽  
pp. 2339-2349 ◽  
Author(s):  
Matthieu Tubino ◽  
José Roberto de Oliveira Torres
Keyword(s):  
Water Solvent ◽  
Calcium Phosphorus ◽  
Leaf Tissues ◽  
Phosphorus And Potassium

Hemodynamic control using models of electroacoustic signals of an oxygenated neuron

2021 ◽  
Vol 21 (3) ◽  
pp. 50-54
Author(s):  
B.G. Tsugkiev ◽  
◽  
L.Ch. Gagieva ◽  
T.V. Tsugkieva ◽  
M.M. Chegaev ◽  
...  
Keyword(s):  
Heavy Metals ◽  
Nutritional Value ◽  
Growing Season ◽  
Comparative Assessment ◽  
Biologically Active ◽  
Onobrychis Viciifolia ◽  
Iron Copper ◽  
Calcium Phosphorus ◽  
Active Substances

The paper presents a comparative assessment of the nutritional value depending on the phenological phase of Onobrychis viciifolia Scop., as well as the determination of the regularity of the accumulation of biologically active substances and heavy metals in the herb of the species. The yield of green mass of plants was determined. From each hectare of sowing, 9,7 centners of protein can be obtained; the yield of fiber is 13 centners, BEV is 22,9 centners, fat is 1,6 centners, ash is 4 centners and carotene is 13.0 kg. Depending on the growing season, the chemical composition in the grass of Onobrychis viciifolia changes. The content of calcium, phosphorus increases, and the presence of iron, copper, cobalt, zinc, manganese and molybdenum and amino acids decreases.

scholarly journals Restoration of soil fertility of the southern chernozem in conditions of the reserve regime of the Orenburg State Nature Reserve

2018 ◽  
Vol 7 (2) ◽  
pp. 126-129
Author(s):  
Alexander Nikolaevich Tyurin
Keyword(s):  
Heavy Metals ◽  
Soil Profile ◽  
Nature Reserve ◽  
Specially Protected Natural Areas ◽  
Southern Chernozem ◽  
State Nature Reserve ◽  
Protected Natural Areas ◽  
Phosphorus And Potassium ◽  
State Nature

This paper presents a comparative-temporal ecological characterization of the southern chernozem under the regime of the Aituar steppe site command of the Orenburg State Nature Reserve. The degree of ecological rehabilitation of chernozems in specially protected natural areas is shown. Quantitative data are provided on the supply of soil with nitrogen, phosphorus and potassium, and the content of heavy metals in the soil. Determination of the content of heavy metals and trace elements in soil samples (according to the method of Krupsky and Aleksandrova in the modification of the Central Institute of Agrochemical Services for Agriculture) was conducted in accordance with GOST 50683-94. The determination of mobile compounds of phosphorus and potassium was carried out by the method of Machigin (GOST-26205-91), organic matter by the Tyurin method (GOST 26213-9), alkaline hydrolyzable nitrogen by Kornfield. The paper presents the results of a comparison of agrochemical and ecology-toxicological studies of southern chernozem in 1996-2016. The main morphogenetic characteristics of the soil profile of the chernozem of the southern carbonate low-humus low-mass medium loamy are given. Data of morphological, physical and agrochemical properties of soils were subjected to mathematical and statistical treatment. This allowed the authors to determine morphological parameters, qualitative and quantitative characteristics of the soil and their variation within the elementary soil areas, depending on the position in the landscape and the nature of use. The data obtained indicate a positive dynamics in the provision of soil with humus and elements of mineral nutrition of plants, as well as a significant reduction in the content of heavy metals throughout the soil profile. Thus, we can talk about the natural restoration of soil fertility in conditions of a protected regime in specially protected natural areas.

scholarly journals STUDI PEMANFAATAN KULIT KOPI ARABIKA (Coffee arabica L.) SEBAGAI MIKRO ORGANISME LOKAL (MOL)

AGROINTEK ◽  
2017 ◽  
Vol 11 (1) ◽  
pp. 1
Author(s):  
A Ita Juwita ◽  
Arnida Mustafa ◽  
Risna Tamrin
Keyword(s):  
Food Source ◽  
Material Decomposition ◽  
Brown Sugar ◽  
Fermentation Time ◽  
Fermentation Method ◽  
Local Material ◽  
Coffee Arabica ◽  
Phosphorus And Potassium ◽  
Macro Nutrients

<span class="fontstyle0">MOL (Mikro Organisme Lokal) is the result of local material decomposition with<br />fermentation method. MOL contains macro and micro nutrients and microbial decomposers.<br />The smaller coffee peel that will fermented, the faster MOL can be formed. To accelerate<br />decomposition in MOL solution, it can be added food source of bacteria such as coconut water<br />and brown sugar.<br />The purpose of this study was to study the process of making MOL from coffee peel, to<br />analyze the content of nitrogen, phosphor, and potassium of MOL of coffee peel and to<br />determine the effect of fermentation time on nitrogen, phosphor, and potassium contents of<br />MOL that resulted.<br />This study was conducted with 4 (four) treatments, week 1, 2, 3 and 4 and 1 factor and<br />using 2 times replicate. The parameter of testing used for making coffee peel as local<br />microorganism are MOL volume, nitrogen, phosphor and potassium contents.<br />The result of study showed that the highest mol volume obtained in week 4 of 8.5 ml and<br />the lowest in week 1 of 5 ml. They were obtained from 500 g coffee peel. Determination of<br />nitogen, phosphorus and potassium as a macro nutrients has been conducted. The result showed<br />that the highest nitrogen was found to be 0,0039% in week 1, 3 and 4 and the lowest in week 2<br />with percentage 0.034 %. Determine of phosphorus showed that the highest phosphor was<br />obtained in week 2 wtih percentage 0.033 % and the lowest in week 4 of 0.018%, and the result<br />of potassium analyze, the highest obtained in week 2 of 0.035 % and the lowest in week 4 of<br />0.014%</span>

Quantitative Identification of Urinary Calculi

1955 ◽  
Vol 1 (4) ◽  
pp. 241-248 ◽  
Author(s):  
Reid H Leonard ◽  
Arthur J Butt
Keyword(s):  
Oxalic Acid ◽  
Quantitative Determination ◽  
Clinical Chemistry ◽  
Urinary Calculi ◽  
Ammonia Nitrogen ◽  
Chemistry Laboratory ◽  
Calcium Phosphorus ◽  
Clinical Chemistry Laboratory ◽  
Quantitative Identification

Abstract Quantitative determination of calcium, phosphorus, and oxalic acid, assisted by occasional determination of ammonia nitrogen and insoluble nitrogen when indicated by qualitative tests, provides a means of computing the component substances of calculi. The determinations may be performed by slight modifications of the methods in use in the routine clinical chemistry laboratory, although flame photometry is particularly convenient for the determination of calcium.

Liquid Chromatographic Method for Quantitative Determination of Free Fatty Acids in Butter

1984 ◽  
Vol 67 (4) ◽  
pp. 718-721 ◽  
Author(s):  
Alan W Reed ◽  
Hilton C Deeth ◽  
Donald E Clegg
Keyword(s):  
Fatty Acids ◽  
Free Fatty Acids ◽  
Chromatographic Method ◽  
Water System ◽  
Internal Standard ◽  
Detection Range ◽  
Water Solvent ◽  
Liquid Chromatographic Method ◽  
Liquid Chromatographic

Abstract A liquid chromatographic method has been developed for the determination of free fatty acids in butter. The fatty acids are converted to the p-bromophenacyl esters, via a crown ether-catalyzed reaction, without separation from the other butter components. The esters are separated on a Cis-bonded silica column by using an acetonitrile-water solvent gradient and quantitated using the ester of heptadecanoic acid as internal standard. Cu, and C ,S:i co-elute in the acetonitrile-water system but are separated using an isocratic methanol-acetonitrile-water system. Limits of detection range from 7 ng for butyric acid to 45 ng for linoleic acid. The average coefficient of variation (n = 10) for 10 free fatty acids from,a butter was 5.83%.

Determination of Nitrogen, Phosphorus, and Potassium in Water-Soluble Fertilizers by Inductively Coupled Plasma Emission Spectrometry

1987 ◽  
Vol 70 (4) ◽  
pp. 760-761
Author(s):  
Danton D. Nygaard ◽  
John J. Sotera
Keyword(s):  
Inductively Coupled Plasma ◽  
Water Soluble ◽  
Emission Spectrometry ◽  
Inductively Coupled ◽  
Extension Tube ◽  
Plasma Emission Spectrometry ◽  
Phosphorus And Potassium ◽  
Icp Torch ◽  
Nitrogen Phosphorus

Abstract A modification of an inductively coupled plasma (ICP) emission spectrometer is described that enables the simultaneous determination of nitrogen, phosphorus, and potassium in water-soluble fertilizers. A quartz extension tube is added to the ICP torch to exclude air from the plasma, thus allowing accurate nitrogen determination without adversely affecting sensitivity for other analytes. The modification also requires an 18 mg/L argon coolant flow to protect the tube from the heat of the plasma. Detection limits are 20 mg/L for nitrogen and 50 μg/L for phosphorus and potassium. Three NBS reference salts and 2 commercially available fertilizers were analyzed by the method, and results are in excellent agreement with known values.

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