Статті в журналах: "COPPER PHOSPHORUS"

1

Puziy, Alexander M., Olga I. Poddubnaya, Barbara Gawdzik, Magdalena Sobiesiak, and Myroslav Sprynskyy. "Structural Evolution of Polyimide-Derived Carbon during Phosphoric Acid Activation." C 8, no. 3 (September 19, 2022): 47. http://dx.doi.org/10.3390/c8030047.

Повний текст джерела

Анотація:

Carbon adsorbents were obtained by carbonization of polyimide polymer with and without the presence of phosphoric acid at temperatures in the range of 400–1000 °C. Carbons produced in the presence of phosphoric acid have been demonstrated to contain up to 13.2% phosphorus. The structure of phosphorus-containing compounds was investigated by XPS and 31P MAS NMR methods. Deconvolution of the P 2p peak with variable binding energy showed the presence of only phosphates/polyphosphates. However, a low value of the O/P ratio is an indirect indication of the possible presence of phosphonates. A 31P MAS NMR study revealed the existence of several kinds of phosphates as well as a minor quantity (1–9%) of phosphonates. All discovered phosphorus-containing compounds are acidic and therefore give carbon the ability to absorb metal cations. The study of copper ion adsorption demonstrated that phosphorus-containing carbon shows a significant adsorption capability even in extremely acidic conditions. At pH 3–6, phosphorus-containing carbon may completely remove copper from the aqueous solution. Phosphorus-containing carbon has a higher adsorption capacity for copper ions than ion exchange resins with carboxyl or sulfo groups.

Стилі APA, Harvard, Vancouver, ISO та ін.

2

Abdreimova, R. R., F. Kh Faizova, and A. A. Karimova. "Copper (II) Catalyzed Oxidative Alkoxylation of White Phosphorus. Communication 2." Eurasian Chemico-Technological Journal 12, no. 3,4 (May 19, 2010): 267. http://dx.doi.org/10.18321/ectj54.

Повний текст джерела

Анотація:

White phosphorus has been catalytically oxidized by oxygen in alcoholic solutions of copper (II) acetylacetonate, halides or carboxylates to yield dialkyl phosphites and trialkyl phosphates under mild reaction conditions. Trialkyl phosphite has been observed as unstable organophosphorus intermediate, which is being converted into the main reaction products. In the case of methanolic solutions, the derivatives of two step acidolysis of dimethyl phosphite, monomethyl phosphite and phosphorous acid, have been additionally detected among the reaction products. The influence of the copper (II) catalysts on the kinetics of accumulation and transmutation of organophosphorus products has been explored. It has been found that the Cu(II) compounds take a role of catalysts-electron-carriers from white phosphorus to oxygen. The indispensable molar ratio between catalyst and white phosphorus and the order of catalytic activity for the copper (II) compounds have been established. The major steps of the catalytic reaction including (i) the coordination of white phosphorus and alcohol to metal ion, (ii) the redox decomposition of this intermediate complex accompanied by reducing elimination of elementary copper and formation of organophosphorus product and (iii) the oxidation of the reduced form of catalyst by oxygen have been<br />also suggested.

Стилі APA, Harvard, Vancouver, ISO та ін.

3

Abdreimova, R. R., F. Kh Faizova, and A. A. Karimova. "Copper (II) Mediated Oxidative Alkoxylation of White Phosphorus. Communication 1." Eurasian Chemico-Technological Journal 12, no. 3,4 (May 19, 2010): 259. http://dx.doi.org/10.18321/ectj53.

Повний текст джерела

Анотація:

White phosphorus has been oxidized by copper (II) acetylacetonate, halides or carboxylates in aliphatic alcohols to yield dialkyl phosphates and trialkyl phosphates under inert atmosphere and mild reaction conditions. Trialkyl phosphite has been observed as unstable organophosphorus intermediate, which is being converted into the main reaction products. In the case of methanolic solutions, the derivatives of two step acidolysis of dimethyl phosphite, monomethyl phosphite and phosphorous acid, have been additionally detected among the reaction products. The influence of the copper (II) oxidants on the kinetics of accumulation and transmutation of organophosphorus products has been explored. The order of oxidative ability of the copper (II) compounds has been established. The major steps of the reaction including (i) the coordination of white phosphorus and alcohol to metal ion and (ii) the redox decomposition of this intermediate complex accompanied by reducing elimination of elementary copper and formation of organophosphorus product have been also suggested.

Стилі APA, Harvard, Vancouver, ISO та ін.

4

de Iorio, A. F., L. Gorgoschide, A. Rendina, and M. J. Barros. "Effect of phosphorus, copper, and zinc addition on the phosphorus/copper and phosphorus/zinc interaction in lettuce." Journal of Plant Nutrition 19, no. 3-4 (March 1996): 481–91. http://dx.doi.org/10.1080/01904169609365137.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

5

Rokosz, K., T. Hryniewicz, Ł. Dudek, A. Schütz, J. Heeg, and M. Wienecke. "Energy-Dispersive X-Ray Spectroscopy Mapping of Porous Coatings Obtained on Titanium by Plasma Electrolytic Oxidation in a Solution Containing Concentrated Phosphoric Acid with Copper Nitrate." Advances in Materials Science 16, no. 3 (September 1, 2016): 15–25. http://dx.doi.org/10.1515/adms-2016-0013.

Повний текст джерела

Анотація:

Abstract The SEM and EDS study results of coatings obtained on titanium by Plasma Electrolytic Oxidation (PEO) in the electrolytes containing of 600 g copper nitrate in 1 liter of concentrated phosphoric acid at 450 V for 1 and 3 minutes, are presented. The obtained coatings are porous and consist mainly of phosphorus within titanium and copper. It was found that the time of PEO oxidation has impact on the chemical composition of the coatings. The longer time of PEO treatment, the higher amount of copper inside coating. The PEO oxidation of titanium for 1 minute has resulted in the creation of coating, on which 3 phases where found, which contained up to 13.4 wt% (9 at%) of copper inside the phosphate structure. In case of 1 minute PEO treatment of titanium, the 2 phases were found, which contained up to 13 wt% (8 at%) of copper inside the phosphate structure. The copper-to-phosphorus ratios after 1 minute processing belong to the range from 0.28 by wt% (0.14 by at%) to 0.47 by wt% (0.23 by at%), while after 3 minutes the same ratios belong to the range from 0.27 by wt% (0.13 by at%) to 0.35 by wt% (0.17 by at%). In summary, it should be stated that the higher amounts of phosphorus and copper were recorded on titanium after PEO oxidation for 3 minutes than these after 1 minute.

Стилі APA, Harvard, Vancouver, ISO та ін.

6

Wu, Guangxue, and Michael Rodgers. "Inhibitory effect of copper on enhanced biological phosphorus removal." Water Science and Technology 62, no. 7 (October 1, 2010): 1464–70. http://dx.doi.org/10.2166/wst.2010.431.

Повний текст джерела

Анотація:

Copper inhibition of enhanced biological phosphorus removal (EBPR) was examined in batch experiments under anaerobic and aerobic conditions. Inhibition was represented by both acetate uptake and phosphorus release coefficients under anaerobic conditions, and by a phosphorus uptake coefficient under aerobic conditions. The results showed that copper inhibition of EBPR occurred mainly during aerobic phosphorus uptake and a first-order phosphorus uptake coefficient can be better used to describe the inhibition effect. For the aerobic phosphorus uptake using the EBPR activated sludge, (i) copper inhibition started at 0.07 mg/l, (ii) 50% and 100% inhibition occurred at 0.30 mg/l and 0.53 mg/l, respectively, and (iii) the inhibition constant was 0.48 mg/l.

Стилі APA, Harvard, Vancouver, ISO та ін.

7

Baghdadi, Amirhossein, Zainuddin Sajuri, and Junaidi Syarif. "Study on Microstructure and Tensile Properties of New Cu-Al Bi-Metal Tubes Versus Pure Copper Tubes." Applied Mechanics and Materials 420 (September 2013): 160–66. http://dx.doi.org/10.4028/www.scientific.net/amm.420.160.

Повний текст джерела

Анотація:

In recent years, heating, ventilation and air condition (HVAC) industries have attempted to find alternative materials such as aluminum for replacing copper metal because of a light weight metal with relatively lower market price compared to copper. This study characterizes microstructure and tensile properties of new Cu-Al bi-metal tubes (aluminum cladded copper (ACC) and copper cladded aluminum (CCA)) versus copper phosphorous alloy tube in order to estimate the possibility of implementing the composite tubes in heating, ventilation, and air conditioning industries. The result shows that Cu phosphorus alloy tubes has the highest tensile properties followed by CCA and ACC bi-metal tubes and different tube size does not affect the tensile properties of tube of the same type.

Стилі APA, Harvard, Vancouver, ISO та ін.

8

Shrestha, Shashi, Sadikshya Thapa, and Sanjay Kumar Jha. "Nutrient Analysis of Selected Wild Edible Mushrooms Collected from Thulo Ban Community Forest, Myagdi District, Nepal." Journal of Plant Resources 21, no. 1 (August 3, 2023): 13–20. http://dx.doi.org/10.3126/bdpr.v21i1.57197.

Повний текст джерела

Анотація:

The study analyzes the nutrient content of three wild edible mushrooms Cantharellus cibarius, Laccaria laccata and Scleroderma cepa commonly consumed by the local people of Arjam, Myagdi district. Thirteen parameters were analyzed such as ash, carbohydrate, fat, moisture, protein, manganese, zinc, magnesium, potassium, iron, copper, phosphorus and calcium. The test methods used for ash, fat, moisture, protein and phosphorous content were ignition, soxhlet extraction, oven dry method, kjeldahl digestion method and spectrophotometric method respectively. Carbohydrate content was determined by calculation method and iron, manganese, copper, zinc, calcium, magnesium and potassium content estimation were done by AAS method. All macro and micronutrient compositions were determined on a dry weight basis. Ash, carbohydrate, fat, moisture and protein are ranges from 7.05-13.38%, 61.89-71.37%, 0.78-1.94%, 12.37-13.66% and 16.18-24.47% respectively, whereas calcium, magnesium, phosphorus and potassium ranges from 0.13-0.15 µg/g, 0.09-0.11µg/g, 0.25-0.37 µg/g and 1.41-3.40 µg/g respectively. Similarly copper, iron, manganese and zinc ranges from 2.40-30.94 µg/g, 0.08-0.20 µg/g, 7.22-16.06 µg/g and 45.70-77.35 µg/g respectively.

Стилі APA, Harvard, Vancouver, ISO та ін.

9

Balart, Maria J., Jayesh B. Patel, and Zhong Yun Fan. "Grain Refinement of Phosphorus Deoxidised Copper." Materials Science Forum 790-791 (May 2014): 161–66. http://dx.doi.org/10.4028/www.scientific.net/msf.790-791.161.

Повний текст джерела

Анотація:

DHP-Cu has been modified with small additions of nanosized MgO particles, with and without P and B additions; and Mg, B, Ti and Al additions to investigate their effect on the grain structure under TP1 casting condition. In comparison to a reference DHP-Cu cast sample which exhibited mainly coarse columnar grains, a coarse equiaxed grain structure has been achieved with a single addition of nanosized MgO particles to a residual content of 34 ppm Mg. Whereas no grain refinement has been observed with nanosized MgO particles and P and B additions to a residual content of 109 ppm and 0.15% (nominal), respectively, and with a single addition of Mg to a residual content of 16 ppm. The combined additions of B and Ti, and B and Al to a nominal residual content slightly beyond the DHP-Cu specification have produced excessive coarsening of grains. Keywords: nanosized MgO particles; grain refinement; DHP-Cu

Стилі APA, Harvard, Vancouver, ISO та ін.

10

Graydon, J. W., and D. W. Kirk. "Suspension Electrodeposition of Phosphorus and Copper." Journal of The Electrochemical Society 137, no. 7 (July 1, 1990): 2061–66. http://dx.doi.org/10.1149/1.2086865.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

11

Okamoto, H. "Comment on Cu-P (copper-phosphorus)." Journal of Phase Equilibria 16, no. 4 (August 1995): 368–69. http://dx.doi.org/10.1007/bf02645303.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

12

Raghavan, V. "Cu-Fe-P (Copper-Iron-Phosphorus)." Journal of Phase Equilibria 19, no. 3 (June 1998): 283–84. http://dx.doi.org/10.1361/105497198770342454.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

13

Jin, Geng Bang, Christos D. Malliakas, and Jian Lin. "Thorium copper phosphides: more diverse metal–phosphorus and phosphorus–phosphorus interactions than U analogues." Dalton Transactions 46, no. 36 (2017): 12041–52. http://dx.doi.org/10.1039/c7dt02145c.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

14

Vlček, Vítězslav, and Miroslav Pohanka. "Adsorption of Copper in Soil and its Dependence on Physical and Chemical Properties." Acta Universitatis Agriculturae et Silviculturae Mendelianae Brunensis 66, no. 1 (2018): 219–24. http://dx.doi.org/10.11118/actaun201866010219.

Повний текст джерела

Анотація:

Soil samples (n = 11) were collected in the chernozem areas of the Czech Republic (the Central Europe) from the topsoil and used as representative samples. All sampling areas have been used for agricultural purposes (arable soil) and they were selected as typical representatives of agricultural soil. These samples represented the soil with same genesis (to reduction differencies between soil types) but with different soil properties (physical and chemical). Complete chemical and physical analyses were made for confirmation of copper adsorption on solid phase: we analysed the particle size distribution, content of oxidizable carbon (Cox), the cation exchange capacity (CEC), supply of exchange calcium, magnesium, sodium, phosphorus and potassium, soil reaction and the total supply of Fe, Al, Mn, Ca, Mg, K, P and N. The strongest simple correlation between analysed soil properties and copper concentration had content of available magnesium (r = 0.44) and available phosphorus (r = −0.51). In the case of multiple correlations (i. e. collective influence of multiple soil properties) had the strongest influence combination of clay, soil reaction, total content of phosphorus, available magnesium and available phosphorus. The main influence of phosphorus and magnesium is evident. We suppose that copper and phosphorus enter into specific complex. Influence of these five soil properties can explain 92.7 % (r = 0.927) changes in the content of copper changes in the experiment.

Стилі APA, Harvard, Vancouver, ISO та ін.

15

Uktamov, Dilmurod, and Mukhayyo Alieva. "Obtaining nitrophos fertilizers with copper, zinc, molybdenum." E3S Web of Conferences 390 (2023): 05034. http://dx.doi.org/10.1051/e3sconf/202339005034.

Повний текст джерела

Анотація:

The purpose of the research is to obtain micronutrient fertilizers by applying micronutrient salts and their complex forms to phosphorus fertilizers obtained in incomplete standards of nitric acid or their salt mixtures. Central Kyzylkum phosphorites (low-grade P2O5-12.38%, CaO-43.68%, CO2-13.48%, non-enriched P2O5-16.38%, CaO-45.93%, CO2-18, 15%, SO3-1.86%, thermoconcentrate P2O5-27.40%; CaO-54.68%; CO2- 4.52%) were decomposed with nitric acid at different rates and phosphorus fertilizers were obtained. Copper and zinc sulfate and ammonium molybdate (Cu, Zn, Mo) salts and their complex forms were applied to the obtained fertilizers and their chemical composition was studied. Central Kyzylkum phosphorite flour was processed in different concentrations of nitric acid. The process of granulation of recycled phosphorus fertilizers in different standards was carried out with the participation of micronutrient salts and their complex solutions, and it was possible to obtain micronutrient phosphorus fertilizers. Along with nitrogen, phosphorus, potassium fertilizers, the demand for micronutrient fertilizers is also increasing in our republic. Currently, microfertilizers are used in practice in very small quantities. In the production of mineral fertilizers, the use of various wastes and products of non-ferrous metallurgy containing microelements, sour effluents, spent catalysts and other types of secondary products is one of the solutions for the production of microelement fertilizers.

Стилі APA, Harvard, Vancouver, ISO та ін.

16

Maksotova, Kuralay S., Dariya T. Kalikh, Arnur T. Omirzakova, Botagoz S. Bakirova, and Dina N. Akbayeva. "Polymer-metal complex based on copper(II) acetate and polyvinyl alcohol: thermodynamic and catalytic properties." Chimica Techno Acta 9, no. 3 (July 26, 2022): 20229304. http://dx.doi.org/10.15826/chimtech.2022.9.3.04.

Повний текст джерела

Анотація:

In this work we obtained a polymer-metal complex by mixing aqueous solution of copper(II) acetate with PVA at a certain ratio, pH of the solution and temperature. The composition of the complex compound was determined by potentiometric and conductometric titration. The possibility of a complex formation was proved by calculating thermodynamic characteristics. The stability constant of the polymer-metal complex was calculated on the basis of the modified Bjerrum’s method. The metal-polymer complex was synthesized in the ratio 1:2. IR spectroscopy and scanning electron microscopy (SEM) confirmed the coordination of polymeric PVA ligand to copper and allowed evaluating the morphology and features of the complex surface. The catalytic activity of the synthesized compound was evaluated in the oxidation reaction of elemental phosphorus (P4) by oxygen in aqueous-organic media under mild conditions. Quantitative analysis of phosphoric acid was made by photocolorimetric method. We found that the oxidation process of P4 in the presence of the complex Cu(PVA)2(OAc)2 in aqueous-organic media is characterized with the maximum absorption rate, in comparison with Cu(OAc)2·H2O oxidation process with P4, and yields up to 97% of the products. The process of oxidation of yellow phosphorus by oxygen in the presence of the copper(II)-PVA complex proceeds through key reactions of two-electron reduction of the catalyst P4 with the formation of intermediate phosphorus-containing products P3+ and the stages of catalyst regeneration by oxygen. Twenty-electron oxidation of P4 to the phosphorus-containing P5+ products involves 10 two-electron redox reactions and a number of complexation or hydrolysis stages.

Стилі APA, Harvard, Vancouver, ISO та ін.

17

Li, Hang, Fumin Wang, Wangfeng Cai, Jinli Zhang, and Xubin Zhang. "Hydrochlorination of acetylene using supported phosphorus-doped Cu-based catalysts." Catalysis Science & Technology 5, no. 12 (2015): 5174–84. http://dx.doi.org/10.1039/c5cy00751h.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

18

Nikiema, Josiane, Ryszard Brzezinski, and Michèle Heitz. "Influence of phosphorus, potassium, and copper on methane biofiltration performanceA paper submitted to the Journal of Environmental Engineering and Science." Canadian Journal of Civil Engineering 37, no. 2 (February 2010): 335–45. http://dx.doi.org/10.1139/l09-145.

Повний текст джерела

Анотація:

In addition to a carbon source, bacteria require for growth a variety of nutrients such as phosphorus, potassium, and several other micronutrients including copper. The study described in this paper was conducted with the aim of determining the influence of phosphorus, potassium, and copper on methane elimination in a biofilter. The study revealed that the particular phosphorus concentration leading to the greatest methane elimination capacity, which was 44.7 g m–3 h–1at a methane inlet load of 75 g m–3 h–1, was 3.1 g/L. The influence of the phosphorus concentration on the methane elimination capacities was also investigated for methane inlet loads of between 8 and 95 g m–3 h–1. The optimum range of the nitrogen–phosphorus mass ratios, determined during this study ranged from 0.5 to 2.5. It was established that, in comparison with phosphorus, potassium does not seem to be a determining element for the biological removal efficiency and does not significantly affect the microorganisms’ behaviour. However, a concentration of 0.076 g/L of potassium is recommended in the irrigation nutrient solution for an inlet load of 75 g m–3 h–1. The influence of the copper concentration was also studied by varying its concentration between the values of 0 and 0.006 g/L. The results have also shown that copper has a minor impact on the biofiltration of methane. This paper is the first report describing the influence of several nutrients in a biofilter. The knowledge provided by this study is necessary for the achievement of a biofilter indebted to methane control.

Стилі APA, Harvard, Vancouver, ISO та ін.

19

Rokosz, Krzysztof, Tadeusz Hryniewicz, and Winfried Malorny. "Characterization of Porous Coatings Obtained on Materials by Plasma Electrolytic Oxidation." Materials Science Forum 862 (August 2016): 86–95. http://dx.doi.org/10.4028/www.scientific.net/msf.862.86.

Повний текст джерела

Анотація:

The main goal of present paper is to obtain porous coatings enriched in copper by Plasma Electrolytic Oxidation on titanium and niobium as well as on NiTi and Ti6Al4V alloys. Performed SEM and EDS studies confirmed the hypothesis that it is possible to create the porous surfaces with pores, which shapes and size are different. In order to show the copper enrichment inside the surface layers, the copper-to-phosphorus ratios were used. Based on these ratios it may be concluded that average value of Cu/P is maximal for NiTi alloy after oxidation in electrolyte containing 300 g of copper nitrate in 1 liter of phosphoric acid and equals 0.26. The minimum of Cu/P ratio equaling to 0.12 was recorded for pure titanium and pure niobium treated in electrolyte containing 300 g of Cu (NO3)2 in 1 L H3PO4.

Стилі APA, Harvard, Vancouver, ISO та ін.

20

Kirk, D. W., and J. W. Graydon. "The Electrolytic Codeposition of Copper and Phosphorus." Journal of The Electrochemical Society 136, no. 11 (November 1, 1989): 3545–46. http://dx.doi.org/10.1149/1.2096503.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

21

Lê Anh, Mai, Alexander Wolff, Martin Kaiser, Sivathmeehan Yogendra, Jan J. Weigand, Julia Pallmann, Eike Brunner, Michael Ruck, and Thomas Doert. "Mechanistic exploration of the copper(i) phosphide synthesis in phosphonium-based and phosphorus-free ionic liquids." Dalton Transactions 46, no. 43 (2017): 15004–11. http://dx.doi.org/10.1039/c7dt03083e.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

22

Rokosz, K., T. Hryniewicz, and W. Malorny. "Characterization of Coatings Created on Selected Titanium Alloys by Plasma Electrolytic Oxidation." Advances in Materials Science 16, no. 1 (March 1, 2016): 5–16. http://dx.doi.org/10.1515/adms-2016-0001.

Повний текст джерела

Анотація:

Abstract The SEM and EDS results of coatings obtained on pure niobium and titanium alloys (NiTi and Ti6Al4V) by Plasma Electrolytic Oxidation in the electrolytes containing of 300 g and 600 g copper nitrate in 1 litre of concentrated phosphoric acid at 450 V for 3 minutes, are presented. The obtained coatings are porous and consist mainly of phosphorus within titanium and copper. For each coating, the Cu/P ratios were calculated. The maximum of that coefficient was found for niobium and Ti6Al4V alloy oxidised in the electrolyte containing 600 g of Cu(NO3)2 in 1 dm3 of H3PO4 and equaling to 0.22 (wt%) | 0.11 (at%). The minimum of Cu/P ratio was recorded for NiTi and Ti6Al4V alloys oxidised by PEO in electrolyte consisting of 300 g of copper nitrate in 1 dm3 of concentrated phosphoric acid and equals to 0.12 (wt%) | 0.06 (at%). The middle value of that ratio was recorded for NiTi and it equals to 0.16 (wt%) | 0.08 (at%).

Стилі APA, Harvard, Vancouver, ISO та ін.

23

Maksymova, S. V., A. N. Pisarev, P. V. Kovalchuk, and V. V. Voronov. "Influence of antimony on structure and mechanical properties of pre-eutectic copper-phosphorus alloys." Paton Welding Journal 2020, no. 10 (October 28, 2020): 35–39. http://dx.doi.org/10.37434/tpwj2020.10.07.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

24

Miteva, Ivanka, Ivan Vinev, and Ivan Mitev. "FEATURES OF ALLOYED A MATRYX OF WATER-DISPERSED IRON POWDERS." ENVIRONMENT. TECHNOLOGIES. RESOURCES. Proceedings of the International Scientific and Practical Conference 3 (June 16, 2021): 226–31. http://dx.doi.org/10.17770/etr2021vol3.6580.

Повний текст джерела

Анотація:

The publication examines the peculiarities of alloying a matrix of water-dispersed iron powders of the type ASC 100.29, AHC 100.29 and ABC 100.30. The possible ways of alloying in powder metallurgy are presented. The influence of the main alloying elements - copper, nickel, phosphorus, molybdenum, etc. was traced. on the technological process in the production of powder metallurgical details. A special place is given to the alloying elements intensifying the process of coagulation of the pores in the matrix during sintering - copper and phosphorus. Graphical dependences for the influence of copper on the dimensional changes of the iron matrix at different sintering temperatures are presented.

Стилі APA, Harvard, Vancouver, ISO та ін.

25

Demirbaş, Ahmet. "Farklı Dozlarda Fosfor Uygulamasının Şeker pancarı (Beta Vulgaris L.) Bitkisinin Verimine ve Besin Elementleri Alımına Etkisi." Turkish Journal of Agriculture - Food Science and Technology 9, no. 2 (February 24, 2021): 420–24. http://dx.doi.org/10.24925/turjaf.v9i2.420-424.4174.

Повний текст джерела

Анотація:

In this study, the effect of different phosphorus doses application on the yield and nutrient uptake of sugar beet plant was investigated under field condition. The study was carried out in Sivas province in 3 replications according to the randomized plot design and Valentina was used as the sugar beet variety. Phosphorus doses were; 0 kg P da-1, 15 kg P da-1, 30 kg P da-1 and applied as triple super phosphate (TSP). Leaf samples were taken approximately 80 days after the planting of sugar beet plant, nitrogen (N), phosphorus (P), potassium (K), calcium (Ca), magnesium (Mg), iron (Fe), zinc (Zn), manganese (Mn), copper (Cu) concentrations and yield were determined at harvest. Research results indicated that the yield increased depending on the increasing phosphorus doses and the highest yield was obtained at 30 kg P da-1 dose with 8151.0 kg da-1. In addition, the highest nitrogen, phosphorus and potassium concentrations were found at 30 kg P da-1 dose (4.77% N, 0.74% P and 2.39% K, respectively). However, the research found that calcium and magnesium concentrations decreased with increasing phosphorus doses. While only iron concentration among microelements increased with phosphorus applications, zinc, manganese and copper concentrations decreased due to increasing phosphorus doses.

Стилі APA, Harvard, Vancouver, ISO та ін.

26

Killingbeck, Keith T., Jeffrey D. May, and Stephen Nyman. "Foliar senescence in an aspen (Populustremuloides) clone: the response of element resorption to interramet variation and timing of abscission." Canadian Journal of Forest Research 20, no. 8 (August 1, 1990): 1156–64. http://dx.doi.org/10.1139/x90-154.

Повний текст джерела

Анотація:

Nutrient movements in the senescing foliage of a Rhode Island Populustremuloides Michx. clone were measured during the years 1986–1988. Mean resorption of nitrogen, phosphorus, and copper was 43, 51, and 10%, respectively. Aluminum, boron, calcium, iron, magnesium, manganese, and zinc increased or remained unchanged in senescing foliage during 1986. Resorption of nitrogen and phosphorus decreased, respectively, from 56 and 64% in 1986 to 24 and 38% in 1988. Mean resorption differed among the 20 ramets studied. Older, larger ramets resorbed less nitrogen and copper than younger, smaller ramets. Timing of abscission strongly influenced resorption and may have been related to drought conditions in 1988 and to differential exposure to wind in all years. Resorption of nitrogen, phosphorus, and copper was lowest in those ramets that lost their leaves earliest and in leaves that senesced earliest on individual ramets. Because P. tremuloides ramets had the physiological potential to resorb more nitrogen and phosphorus than they actually did in 1988, we introduced the terms potential resorption and realized resorption to differentiate between physiological potential and ecological reality. Our data suggest that at least some portion of realized resorption is determined stochastically by environmental constraints.

Стилі APA, Harvard, Vancouver, ISO та ін.

27

Sztwiertnia, K., and F. Haessner. "Orientation Characteristics of the Microstructure of Highly Rolled Pure Copper and Phosphorus-Copper." Textures and Microstructures 20, no. 1-4 (January 1, 1993): 87–109. http://dx.doi.org/10.1155/tsm.20.87.

Повний текст джерела

Анотація:

Orientational aspects of the mutual arrangement of crystallites in a microstructure can be described by certain distribution functions of orientation or orientation differences. Among these functions the "principle" distributions are completely determined by the texture, whereas the "partial" distributions can be used to describe correlations between orientations. The most interesting partial distribution, the misorientation distribution function (MODF), concerns nearest neighbourhood relations. The basic source of information about all of these descriptions is the spatial arrangement of orientations in the sample. In the present case the local orientation arrangement in 95% rolled pure copper and phosphorus copper was determined in the TEM using Kikuchi-patterns.The analysis of the data show that:(i) the orientational details vary in a smaller lateral scale in phosphorus copper than in pure copper.(ii) the spatial arrangement of orientations in the sample is by no means random: spatial orientation "clustering" or "ordering" may occur.(iii) the MODF, which shows the distribution of orientation differences between neighboured areas in the microstructure, clearly reveals in both materials a strong preference for ~60°(111) and ~50°(110) relations. These and practically all other orientation differences found in the materials correspond to the Coincidence Site-Lattice (CSL) orientation relationships.

Стилі APA, Harvard, Vancouver, ISO та ін.

28

Fiorentin, Eliana L., Solange Zanovello, Andrei Gato, André L. Piovezan, Maurício V. Alves, Ricardo X. Rocha, and Félix Gonzalez. "Occurrence of subclinical metabolic disorders in dairy cows from western Santa Catarina state, Brazil." Pesquisa Veterinária Brasileira 38, no. 4 (April 2018): 629–34. http://dx.doi.org/10.1590/1678-5150-pvb-5156.

Повний текст джерела

Анотація:

ABSTRACT: The management of dairy herds during the transition period has been studied in several studies due to the severe adjustments to which cows are submitted in the metabolism of carbohydrates, lipids and minerals at early lactation. This is a period when occurs most of the metabolic disorders in dairy cows, especially in their subclinical form. Hitherto a lack of information exists on the occurrence of subclinical metabolic disorders in Brazil. The aim of this study was to determine the occurrence of subclinical metabolic disorders, including ketosis, liver lipidosis, hypocalcemia, lactacidemia and hypomagnesemia, as well as phosphorous, copper and zinc deficiency in dairy cattle from the western region of Santa Catarina state, southern Brazil, during the first 30 days of lactation. Blood samples from 15 dairy herds managed in intensive production (free-stall) and semi-confined systems were collected. Milk yield, reproduction and health data of the herd were recorded in a questionnaire, based on the records of the farm and on the observations during samples collection. Blood samples were collected for the measurement of beta-hydroxybutyrate (BHB) and lactate using portable monitors at the farm and for obtaining serum to perform the following biochemical determinations: total calcium, phosphorus, magnesium, albumin, aspartate transaminase (AST) and creatine kinase (CK) by UV-visible spectrophotometry, and copper and zinc by atomic absorption spectrophotometry. In this study, the cutoff points considered were as follows: serum BHB concentrations >1.2mmol/L for subclinical ketosis, AST >140U/L and CK <94U/L for subclinical liver lipidosis, serum lactate concentrations >2.2mmol/L for lactacidemia, serum total calcium concentrations <7.5mg/dL for subclinical hypocalcemia, serum magnesium concentration <1.7mg/dL for hypomagnesemia, serum phosphorus concentration <2.5mg/dL for phosphorus deficiency, serum copper concentrations <32.8μg/dL for copper deficiency, and serum zinc concentrations <60μg/dL for zinc deficiency. The results showed an occurrence of 9% for subclinical ketosis, 11% for subclinical liver lipidosis, 44.5% for lactacidemia, 11% for subclinical hypocalcemia, 7.4% for subclinical hypomagnesemia, 10.7% for copper deficiency and 8.7% for zinc deficiency. According to the survey results, the occurrence of subclinical ketosis, lipidosis and hypocalcemia in western Santa Catarina differ from data found in the literature

Стилі APA, Harvard, Vancouver, ISO та ін.

29

Pfitzner, Amo, and Eva Freudenthaler. "(CuI)2P14: ein neues Phosphorpolymer in einer Kupferhalogenid-Matrix /(CuI)2P14: a Novel Phosphorus Polymer in a Copper Halide Matrix." Zeitschrift für Naturforschung B 52, no. 2 (February 1, 1997): 199–202. http://dx.doi.org/10.1515/znb-1997-0209.

Повний текст джерела

Анотація:

Abstract (CuI)2P14 is a new adduct of copper iodide to a neutral phosphorus polymer. It is obtained by reaction of Cul and Pred at 400 °C. The compound crystallizes monoclinically, space group P21/c (No. 14), a = 9.919(2), b = 9.718(2), c = 16.478(3) Å, β = 105.71(1)°, V = 1529.0(7) Å3, with Z = 4. The crystal structure was refined to R1 = 0.029 for 2680 reflections and 173 parameters. It contains a new polymeric phosphorus allotrope with the translational unit P14±0 consisting of experimentally unknown [P12] groups which are linked by [P2] fragments. The phosphorus rods consist of five-and six-membered rings, and are coordinated only by copper atoms.

Стилі APA, Harvard, Vancouver, ISO та ін.

30

Subedi, Thaneshwar. "Analysis of plant nutrient elements of soil in Pokhara." Himalayan Biodiversity 6 (December 2, 2018): 58–62. http://dx.doi.org/10.3126/hebids.v6i0.33533.

Повний текст джерела

Анотація:

The study was carried out to analyse plant nutrient elements present in soil samples from different part of Pokhara metropolitan city and to compare them with standard recommended values. The plant nutrient elements of soil samples nitrogen, phosphorus, potash, zinc, iron, copper, and boron were analyzed by using specific techniques. The PH was analysed by PH meter, organic matter by gravimetric method, nitrogen by Kjeldal method and phosphorus by Olsen’s method (1954) of analysis. Similarly, the amount of zinc, iron and copper were determined by chemical method, potassium by flame photometer method, and boron by using a spectrophotometer. The essential macronutrients nitrogen, phosphorus and potash remained within the permissible limit for most of the samples. The essential micronutrients zinc, copper and boron in four samples were within the acceptable range. The content of iron was higher than that required as an essential crop nutrient. The observed values of plant nutrient elements expressed that the sampling area could be used for agricultural cultivation and production.

Стилі APA, Harvard, Vancouver, ISO та ін.

31

Jadhav, Dadbakhsh, Vleugels, Hofkens, Puyvelde, Yang, Kruth, Humbeeck, and Vanmeensel. "Influence of Carbon Nanoparticle Addition (and Impurities) on Selective Laser Melting of Pure Copper." Materials 12, no. 15 (August 2, 2019): 2469. http://dx.doi.org/10.3390/ma12152469.

Повний текст джерела

Анотація:

The addition of 0.1 wt % carbon nanoparticles significantly improved the optical absorption and flowability of gas-atomized copper powder. This facilitated selective laser melting (SLM) by reducing the required laser energy density to obtain 98% dense parts. Moreover, the carbon addition led to an in situ de-oxidation of the copper parts during the SLM process. The properties of the as-built copper parts were limited to a tensile strength of 125 MPa, a ductility of 3%, and an electrical conductivity of 22.7 × 106 S/m, despite the advantageous effect of carbon on the powder characteristics and SLM behavior. The modest mechanical properties were associated with the segregation of carbon nanoparticles and other impurities, such as phosphorus and oxygen along grain boundaries of epitaxially grown grains. Whereas, the low electrical conductivity was mainly attributed to the phosphorus impurity in solid-solution with copper.

Стилі APA, Harvard, Vancouver, ISO та ін.

32

Zhao, Li Li, Yong Zhu Yang, Miao Zhang, Yang Wei Li, and Ying Xiang Jiang. "Preparation and Characterization of Phosphorus Removal Agent by Lanthanum-Copper Composite Oxide." Advanced Materials Research 887-888 (February 2014): 26–31. http://dx.doi.org/10.4028/www.scientific.net/amr.887-888.26.

Повний текст джерела

Анотація:

Lanthanum-copper Composite Oxide Compounds were prepared from lanthanum chloride (LaCl3) and copper chloride (CuCl2), and used sodium hydroxide (NaOH) as precipitating agent. The research results showed that: the best preparation condition, which is the copper content3%;water bath temperature,70°C; agitation time,2 hours; calcination temperature,400°C; calcination time,1hour.The adsorption capacity of adsorbent was 63.88mg/g in this state. Analysis results indicate that Copper-doped crystal form dense granule in favour of phosphate adsorption .And La2O3is very important on removing the phosphate.

Стилі APA, Harvard, Vancouver, ISO та ін.

33

Kokoszyński, Dariusz, Anna Wilkanowska, Henrieta Arpášová, and Cyril Hrnčár. "Comparison of some meat quality and liver characteristics in Muscovy and mule ducks." Archives Animal Breeding 63, no. 1 (May 5, 2020): 137–44. http://dx.doi.org/10.5194/aab-63-137-2020.

Повний текст джерела

Анотація:

Abstract. The aim of the study was to compare Muscovy ducks and mule ducks for proximate analysis, colour attributes, sensory properties of the meat, and concentration of some minerals in the meat and liver, with consideration of the effect of sex on the analysed traits. The study used 46 Muscovy and 44 mule ducks. At the end of the rearing period, 40 birds (10 males and 10 females of each genotype) were selected for slaughter. Meat and liver samples were collected from the slaughtered birds to determine quality traits. The analysed ducks of different genotypes differed significantly in the water content, sodium content, and redness of breast muscles; in the water, fat, and zinc content of leg muscles; and in the sodium, iron, and copper content of liver. Regardless of genotype, males had a higher sodium content in breast muscles; contained more protein, sodium, phosphorus, and magnesium and less potassium and copper in leg muscles; and had a significantly higher content of sodium, potassium, phosphorus, magnesium, zinc, iron, and copper in liver compared to females. The genotype–sex interaction was significant for the sodium and potassium content of breast muscles, for the water, protein, sodium, potassium, phosphorus, magnesium, and copper content of leg muscles, and for the copper content of liver. Our study provided information about differences in the quality of meat and liver in Muscovy and mule ducks.

Стилі APA, Harvard, Vancouver, ISO та ін.

34

Ohadi, Sara, Amar Godar, John Madsen, and Kassim Al-Khatib. "Response of Rice Algal Assemblage to Fertilizer and Chemical Application: Implications for Early Algal Bloom Management." Agronomy 11, no. 3 (March 13, 2021): 542. http://dx.doi.org/10.3390/agronomy11030542.

Повний текст джерела

Анотація:

California water-seeded rice is challenged with the rapid growth of nuisance algae at the beginning of the season. Rice seedlings entangled in the algal mat may not be established, causing empty rice patches in the field. Two separate studies were conducted to (1) evaluate the effect of nutrients (nitrogen and phosphorous) on algae growth, and (2) test various chemical options to control algae. Both studies utilized 19 L buckets inoculated with algae collected from a rice field. In the nutrient evaluation study, 36 nutrient treatments obtained from a combination of nitrogen (0, 60, 120, 180, 240 and 300 kg ha−1) and phosphorous (0, 20, 40, 60, 80 and 100 kg ha−1) rates were applied into the buckets, while eight chemicals with potential for algae control (two Protox inhibitor herbicides, four copper-based compounds, hydrogen peroxide, Zinc sulfate) were tested in the second experiment. In addition, a yeast extract-based surfactant (AMP activator) was tested in combination with a chelated copper formulation (Algimycin) and hydrogen peroxide. The studies had a completely randomized design with three replicates and each study was repeated two times. The result from the nutrient evaluation study showed that nitrogen and phosphorus can independently cause change in algae growth as reflected in the fresh and dry biomass. Moreover, low rates of either nitrogen or phosphorus resulted in a rapid increase in algae biomass and water chlorophyll a content, whereas the growth of algae declined at higher rates of applied fertilizer. Among tested chemicals in the second experiment, the chelated formulation of copper (Algimycin PWF) controlled algae (85%) better than the ethanolamine formulations [Cutrine-Ultra (70%) and Cutrine-Plus (52%)] and elemental copper (crystalline copper sulfate) (75%). Protox herbicides (oxyfluorfen and oxadiazon) were able to control algae by up to 70%. Hydrogen peroxide controlled algae by 50% and its efficacy dropped dramatically five days after treatment (DAT). Zinc sulfate was only effective at 1 DAT and algae recovered rapidly after that. Combining fertilizer management practices with chemical options will enable us toward an integrative approach for early algal bloom in the rice cropping system.

Стилі APA, Harvard, Vancouver, ISO та ін.

35

Sandström, Rolf, and Henrik C. M. Andersson. "The effect of phosphorus on creep in copper." Journal of Nuclear Materials 372, no. 1 (January 2008): 66–75. http://dx.doi.org/10.1016/j.jnucmat.2007.02.004.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

36

an Mey, Sabine, and Philip J. Spencer. "A thermodynamic evaluation of the copper-phosphorus system." Calphad 14, no. 3 (July 1990): 265–74. http://dx.doi.org/10.1016/0364-5916(90)90026-v.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

37

RAGHAVAN, V. "ChemInform Abstract: Cu-Fe-P (Copper-Iron-Phosphorus)." ChemInform 29, no. 41 (June 19, 2010): no. http://dx.doi.org/10.1002/chin.199841279.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

38

Alami, Omar, Régis Laurent, Jean-Pierre Majoral, Nabil El Brahmi, Said El Kazzouli, and Anne-Marie Caminade. "Copper complexes of phosphorus dendrimers and their properties." Inorganica Chimica Acta 517 (March 2021): 120212. http://dx.doi.org/10.1016/j.ica.2020.120212.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

39

Torrinha, Álvaro, Marta Oliveira, Susana Marinho, Paula Paíga, Cristina Delerue-Matos, and Simone Morais. "Mineral Content of Various Portuguese Breads: Characterization, Dietary Intake, and Discriminant Analysis." Molecules 24, no. 15 (July 31, 2019): 2787. http://dx.doi.org/10.3390/molecules24152787.

Повний текст джерела

Анотація:

The chemical composition and daily mineral intake (DMI) of six macro (calcium, magnesium, sodium, potassium, phosphorous, and chloride) and four microminerals (copper, iron, manganese, and zinc) were determined in four types of Portuguese breads (white wheat, maize, wheat/maize, and maize/rye breads). Samples were processed with microwave assisted digestion and mineral composition was determined with a high-resolution continuum-source atomic absorption spectrometer with flame and graphite furnace. Bread contributes to an equilibrated diet since it is rich in several minerals (0.21 mg/100 g of copper in wheat bread to 537 mg/100 g of sodium in maize/rye bread). Maize/rye bread presented the highest content of all minerals (except phosphorous and chloride), while the lowest levels were mainly found in wheat bread. Median sodium concentrations (422–537 mg/100 g) represented more than 28% of the recommended daily allowance, being in close range of the maximum Portuguese limit (550 mg/100 g). Maize/rye bread exhibited the highest DMI of manganese (181%), sodium (36%), magnesium (32%), copper (32%), zinc (24%), iron (22%), potassium (20%), and calcium (3.0%). A Principal Component Analysis (PCA) model based on the mineral content allowed the differentiation among white wheat, maize, and maize/rye bread. Zinc, magnesium, manganese, iron, phosphorus, potassium, copper, and calcium proved to be good chemical markers to differentiate bread compositions.

Стилі APA, Harvard, Vancouver, ISO та ін.

40

Borangazieva, Akbope K., Yerzhan A. Boleubayev, Zhuldyz U. Ibraimova, Sholpan S. Itkulova, and Gulshara S. Polimbetova. "Catalytic Oxidation of Phosphine by Aqueous Copper–Ammonia Complexes." Catalysts 13, no. 2 (January 25, 2023): 271. http://dx.doi.org/10.3390/catal13020271.

Повний текст джерела

Анотація:

The furnace gas resulting from the electrothermal production of yellow phosphorus contains up to 95% CO, 2% O2, 2% H2, and 0.3–4.0% impurities, including phosphine (PH3), yellow phosphorus (P4), and hydrogen sulphide (H2S), which are characterized by flammability, explosion hazardousness, corrosiveness, and high toxicity. The presence of toxic impurities does not allow the use of waste gases from phosphorus production, which are mainly composed of valuable carbon monoxide, as chemical raw materials and/or process fuel. The authors propose a method for the purification of furnace gas from the main toxic component, phosphine, by its oxidisation using aqueous copper–ammonia complexes as a catalyst. This approach allows the cleaning process to be conducted under mild conditions. The degree of purification of the model furnace gas from P components is 90–99%, depending on the process conditions.

Стилі APA, Harvard, Vancouver, ISO та ін.

41

Bilal, Tarik, Erol Ercag, Gulcan Demirel, and Tanay Bilal. "Comparison of some blood parameters, serum vitamin E and mineral concentrations of Arabian and English thoroughbred race horses." Veterinarski glasnik 58, no. 1-2 (2004): 135–43. http://dx.doi.org/10.2298/vetgl0402135b.

Повний текст джерела

Анотація:

The aim of this study was to determine some blood parameters, serum vitamin E and mineral concentrations of Arabian and English thoroughbred racehorses fed the same diets. The diet was formulated to provide 2.31 Mcal DE/kg, and 10.96% crude protein. Total protein, lactate, calcium, phosphorus, potassium copper, cobalt and zinc were determined in serum obtained from 40 Arabian and 40 English healthy racing thoroughbred horses aged 2-3. The copper, cobalt and zinc concentrations were determined by atomic absorption, vitamin E by HPLC and the other biochemical parameters by a spectrophotometer. Mean values were 6.77 and 6.86 g/dl for total protein, 1.88 and 2.16 mg/dl for lactate 13.18 and 12.80 mg/dl for calcium, 4.35 and 4.39 mmol/l for phosphorus, 2.64 and 3.14 mmol/l for potassium, 129 and 166 ?g/dl for copper, 36 and 44 ?g/dl for cobalt and, 160 and 58 ?g/dl for zinc in Arabian and English horses respectively, and Mean serum vitamin E levels were 2.65 and 2.81 ?g/ml respectively. This study did not demonstrate a significant effect of breed on serum total protein, lactate, calcium, phosphorus, copper, cobalt and vitamin E. However, breed may have an effect on potassium and zinc concentration in Arabian and English thoroughbred racehorses (p<0.05).

Стилі APA, Harvard, Vancouver, ISO та ін.

42

Panferova, Liubov I., Vitalij V. Levin, Marina I. Struchkova, and Alexander D. Dilman. "Light-mediated copper-catalyzed phosphorus/halogen exchange in 1,1-difluoroalkylphosphonium salts." Chemical Communications 55, no. 9 (2019): 1314–17. http://dx.doi.org/10.1039/c8cc09115c.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

43

Zhang, Xinzhi, Yangyang Zhang, Cuijian Liang, and Jun Jiang. "Copper-catalyzed P–H insertion reactions of sulfoxonium ylides." Organic & Biomolecular Chemistry 19, no. 26 (2021): 5767–71. http://dx.doi.org/10.1039/d1ob00948f.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

44

Gandziura, V., and N. Korevo. "Peculiarities of fish phosphorus balance at a high Cu2+ content in water." Bulletin of Taras Shevchenko National University of Kyiv. Series: Biology 77, no. 1 (2019): 75–79. http://dx.doi.org/10.17721/1728_2748.2019.77.75-79.

Повний текст джерела

Анотація:

The essential infringements of fish phosphorus balance at elevated concentrations of Cu2+ in water was established – a sharp increase of intensity of phosphorus excretion, which ultimately leads to a significant decrease in its content in the body of fish. The peculiarities of the phosphorus balance of fish of various trophic groups: zooplankton phage, benthophages and ichthyophages have been established. It was found out how trophic conditions effect on the components of the phosphorus balance. It was found out how trophic conditions affect the components of the phosphorus balance. Bentofages and zooplankton- phages at the conditions of higher copper content have more pronounced disorders the phosphorus balance then ichthyophage-predators at the same time, even with an increase in the intensity of phosphorus excretion due to the increased copper content in the aquatic environment, was noted by minimal changes in its content in the body, due to the chemical composition of the food of these trophic groups. It was shown that when the content of Cu2+ in water is 10 µg / l of feed use with a high phosphorus content (3.0 %), it can compensate for its loss due to increased excretion, normalize its natural content in the body and increase the growth rate of fish and their feed efficiency. It is proposed to use the intensity of phosphorus excretion for the diagnosis of toxic pollution of the aquatic environment by heavy metals. At the same time, fish of various trophic groups should be used, with the exception of predators

Стилі APA, Harvard, Vancouver, ISO та ін.

45

FREUDENTHALER, E. "Copper(I) halide-phosphorus adducts: a new family of copper(I) ion conductors." Solid State Ionics 101-103 (November 1997): 1053–59. http://dx.doi.org/10.1016/s0167-2738(97)00169-0.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

46

Ahmida, Nagwa H. S., Naema A. Abdeljalil, Intisar A. Elshara, Abdulsalam A. Benkhayal, and Mohemed H. S. Ahmida. "The Contents of Some Essential Major and Trace Elements in Various Types of Processed Milk Products Collected from Benghazi Markets." Journal of Pure & Applied Sciences 21, no. 2 (December 30, 2022): 141–45. http://dx.doi.org/10.51984/jopas.v21i2.2090.

Повний текст джерела

Анотація:

Milk is an important food; it supplies our body with the essential mineral’s requirements. In this study, some major (Calcium, magnesium, phosphorus) and minor (copper, iron, zinc) essential minerals were determined in seventy-eight random processed milk samples. These samples were collected from different markets in Benghazi city, Libya during 2017. The order of major essential elements concentrations in all milk samples was calcium> phosphorous> magnesium. The mean concentrations of calcium were recorded at 4262 ±2771mg/kg, 5006 ±896mg/kg, 1276 ±319mg/kg and 1231 ±154mg/kg, while mean concentrations of magnesium were 560.1 ±82mg/kg, 419.4 ±153mg/kg, 249 ±7.1mg/kg, 127.7 ±21mg/kg, in powdered, infant formula, evaporated and sterilized milk samples, respectively. Phosphorus concentration varied between 3322-7692mg/kg, 2622-5490mg/kg, 1381-4720mg/kg and 1049-2326mg/kg in powdered, infant formula, evaporated and sterilized milk, respectively. The contents of trace essential minerals, included copper, iron and zinc, were detected in all collected samples. The highest copper content was recorded in powder milk, with a mean concentration 2.13 ±0.84mg/kg, followed by infant formula products, with mean concentration 1.15±0.95mg/kg. The mean concentrations of zinc and iron in milk powder products were detected at 33.48 ±17.4mg/kg and 27.60mg/kg, respectively. The concentration of minor element in evaporated and sterilized milk samples were in concentration lower than 1mg/kg, except zinc in evaporated milk, which varied between 2.80-5.77mg/kg. The contents of essential minerals were agreed with some values that recorded in published results, for same products of processed milk.

Стилі APA, Harvard, Vancouver, ISO та ін.

47

Razanov, S., S. Tkachyk, and A. Razanova. "The intensity of heavy metals accumulation by the milk thistle leaf mass under its fertilization with the latest fertilizers." Agrobìologìâ, no. 2(161) (November 24, 2020): 160–67. http://dx.doi.org/10.33245/2310-9270-2020-161-2-160-167.

Повний текст джерела

Анотація:

The aim of the research is to study the intensity of heavy metals accumulation in milk thistle leaf mass under fertilization with the latest types of fertilizers and to assess the environmental safety of such raw materials. Two experiments were laid in the research: the effect of fertilizing milk thistle with organo-mineral fertilizer Growth-concentrate on the intensity heavy metals accumulation by its leaf mass; the effect of fertilizing milk thistle with chelated fertilizers Phosphorus-chelate and Potassium-chelate on the intensity on heavy metals accumulation by the leaf mass. The use of a chelated Phosphorus chelate fertilizer for the fertilization of milk thistle crops leads to a 1.1 times decrease in the contamination of its leaf mass with cadmium and copper in comparison with the option without fertilizing its crops, and the increase in the concentration of lead and zinc compared to the control is insignificant and is within the range errors of experience. The use of fertilization of crops of milk thistle chelated fertilizer Potassium-chelate helps to reduce the contamination of its leaf mass with cadmium compared to the control, and the change in its contamination with copper is within the margin of error. At the same time, replacing the Growth-concentrate fertilizer with Phosphorus-chelate or Potassium-chelate when fertilizing milk thistle crops will lead to a decrease in the contamination of its leaf mass with lead, cadmium and copper, but will increase the contamination with zinc, compared to the control. The most environmentally safe leaf raw material of milk thistle in terms of lead, cadmium and copper content will be observed when fertilizing its crops with chelated fertilizers Phosphorus-chelate, and in terms of zinc content – when fertilizing with organo-mineral fertilizer Growth-concentrate. It is advisable to use Phosphorus-chelate fertilizer for the plant fertilization to reduce the contamination of the leaf mass of the medicinal raw material of milk thistle with heavy metals, in particular cadmium – by 9 % and copper – by 11 %,. To reduce contamination of the leaf mass with zinc by 81 %, it is recommended to use the organic-mineral fertilizer Growth-concentrate. Key words: milk thistle, medicinal raw materials, environmental safety, heavy metals, pollution, fertilizers.

Стилі APA, Harvard, Vancouver, ISO та ін.

48

Huang, Xiaofeng, Yanfu Wei, Tao Zhou, Yangsong Qin, Kunyang Gao, and Xinyue Ding. "Synthesis of tetrakis (hydroxymethyl) phosphonium chloride by high-concentration phosphine in industrial off-gas." Water Science and Technology 68, no. 2 (July 1, 2013): 342–47. http://dx.doi.org/10.2166/wst.2013.240.

Повний текст джерела

Анотація:

With increasing consumption of phosphate rock and acceleration of global phosphate production, the shortage of phosphate resources is increasing with the development and utilization of phosphate. China's Ministry of Land and Resources has classified phosphate as a mineral that cannot meet China's growing demand for phosphate rock in 2010. The phosphorus chemical industry is one of the important economic pillars for Yunnan province. Yellow phosphorus production in enterprises has led to a significant increase in the amount of phosphorus sludge. This paper focuses on phosphine generation in the process of phosphoric sludge utilization, where the flame retardant tetrakis (hydroxymethyl) phosphonium chloride (THPC) is synthesized by high concentrations of phosphine. The optimum conditions are determined at a space velocity of 150 h−1, a reaction temperature of 60 °C, 0.75 g of catalyst, and a ratio of raw materials of 4:1. Because of the catalytic oxidation of copper chloride (CuCl2), the synthesis of THPC was accelerated significantly. In conclusion, THPC can be efficiently synthesized under optimal conditions and with CuCl2 as a catalyst.

Стилі APA, Harvard, Vancouver, ISO та ін.

49

Zhang, Hui, Xue-Yan Zhang, Dao-Qing Dong, and Zu-Li Wang. "Copper-catalyzed cross-coupling reactions for C–P bond formation." RSC Advances 5, no. 65 (2015): 52824–31. http://dx.doi.org/10.1039/c5ra08858e.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

50

Turnbull, C. R. A., C. L. Beadle, P. W. West, and R. N. Cromer. "Copper deficiency a probable cause of stem deformity in fertilised Eucalyptusnitens." Canadian Journal of Forest Research 24, no. 7 (July 1, 1994): 1434–39. http://dx.doi.org/10.1139/x94-185.

Повний текст джерела

Анотація:

Serious malformation of tree stems and branches was first observed 17 months after planting Eucalyptusnitens (Deane & Maiden) Maiden trees on an improved pasture site in southern Tasmania. The trees were planted in a 52 factorial fertiliser trial with application of nitrogen at 0, 60, 120, 240, and 480 kg/ha and phosphorus at 0, 30, 60, 120, and 240 kg/ha. The phosphorus was semibroadcast as a single dose just after planting in September 1990 and the nitrogen was applied over a 2-year period from planting. At 21 months of age, the degree of malformation increased significantly with increasing levels of nitrogen or phosphorus fertilisers and was most severe at the highest levels of application. There was a significant linear trend of decreasing diameter growth with increasing levels of phosphorus fertiliser. The concentration of Cu in the foliage was significantly lower in malformed than unaffected trees whilst other macro- and micro-nutrient foliar levels were within the normal range for healthy individuals. Whilst the symptoms appear similar to those of "Toorour syndrome" previously reported for Pinusradiata D. Don on improved pasture sites in Australia, we believe the present symptoms may result from Cu deficiency induced at high fertiliser levels. The deformations substantially reduce the merchantability of trees from the plantation.

Стилі APA, Harvard, Vancouver, ISO та ін.

Статті в журналах з теми "COPPER PHOSPHORUS"

Оформте джерело за APA, MLA, Chicago, Harvard та іншими стилями