Thermophysical properties of amino acids L-serine and L-leucine in aqueous diammonium hydrogen phosphate solutions: Volumetric and acoustic studies

2021 ◽  
pp. 117780
Author(s):  
Harsh Kumar ◽  
Vaneet Kumar ◽  
Seema Sharma ◽  
Ayman A. Ghfar ◽  
Arjuna Katal ◽  
...  
Keyword(s):  
Amino Acids ◽  
Thermophysical Properties ◽  
Hydrogen Phosphate ◽  
Diammonium Hydrogen Phosphate ◽  
Phosphate Solutions ◽  
Diammonium Hydrogen

scholarly journals Broiler growth response from practical low-protein diets supplemented with urea and diammonium hydrogen phosphate.

1980 ◽  
Vol 28 (3) ◽  
pp. 147-155
Author(s):  
A.R. El Boushy
Keyword(s):  
Amino Acids ◽  
Crude Protein ◽  
Control Diet ◽  
Essential Amino Acids ◽  
Feed Conversion ◽  
Hydrogen Phosphate ◽  
Diammonium Hydrogen Phosphate ◽  
Diammonium Hydrogen ◽  
Finisher Diets ◽  
Effect On Growth

In an experiment with 480 Hybro chickens initially 1 day old, 6 starter diets were given to appetite for the first 4 weeks: (A) 23.5% crude protein, rich in essential amino acids; (B) 20.6% crude protein, containing essential amino acids to meet requirements; (C) B + 1% urea; (D) B + 0.5% urea; (E) B + 2.2% diammonium hydrogen phosphate (DAP); (F) B + 1% DAP. The finisher diets were: (A) 20% crude protein; (B) 18% crude protein with essential amino acids to meet requirements; (C) B + 0.7% urea; (D) B + 0.35% urea; (E) B + 1.5% DAP; (F) B + 0.75% DAP. Adding 1% urea or 2.2% DAP to the starter diets decreased growth and feed conversion significantly, whereas 0.5% urea or 1.1% DAP had no significant effect on growth and feed conversion, compared with control A. Adding 0.7 or 0.35% urea to the finisher diets decreased growth and feed conversion compared with diet A. Whereas the diet containing 0.75% DAP gave better results than that containing 1.5% DAP, there was no significant effect on growth, compared with group A. At 7 weeks of age, low concentrations of urea or DAP did not produce results that differed significantly from control diet B as far as feed conversion was concerned, but they were not comparable to control diet A. (Abstract retrieved from CAB Abstracts by CABI’s permission)

Facile Synthesis of Hydroxyapatite Nanorods with Controlled Sizes and Morphologies

2010 ◽  
Vol 148-149 ◽  
pp. 1584-1587
Author(s):  
Sha Sha Lv ◽  
Ning Wang ◽  
Gui Cun Li ◽  
Hong Rui Peng
Keyword(s):  
Hydrothermal Method ◽  
Calcium Chloride ◽  
Hydrogen Phosphate ◽  
Facile Synthesis ◽  
High Quality ◽  
Facile Hydrothermal Method ◽  
Diammonium Hydrogen Phosphate ◽  
Diammonium Hydrogen

High quality hydroxyapatite (HAP) nanorods have been synthesized at 180 °C by a facile hydrothermal method using calcium chloride and diammonium hydrogen phosphate as precursors in the absence of any surfactants. The diameters and lengths of HAP nanorods are in the range of 40-80 nm and 0.2-2.0 μm respectively. The sizes and morphologies of HAP nanorods can be controlled by adjusting the synthetic parameters, such as reaction temperatures, and types of surfactants. A possible mechanism was also proposed to explain the growth of the HAP nanorods.

Proton Conducting Electrolytes Synthesized with Diammonium Hydrogen Phosphate

2009 ◽  
Vol 421-422 ◽  
pp. 471-474 ◽  
Author(s):  
Dedy Eka Priyanto ◽  
Hidenobu Shiroishi ◽  
Satoshi Tanimoto ◽  
Shunsuke Hirukawa ◽  
Morihiro Saito ◽  
...  
Keyword(s):  
Solid State ◽  
Impedance Spectroscopy ◽  
Molar Ratio ◽  
Preparation Process ◽  
Ac Impedance Spectroscopy ◽  
Hydrogen Phosphate ◽  
Proton Conducting ◽  
Diammonium Hydrogen Phosphate ◽  
Diammonium Hydrogen

Proton conducting ZrO2－yP2O5 (y = 1.0, 1.2, 1.4. 1.6, 1.8) electrolytes based on a shell-core structure were synthesized with diammonium hydrogen phosphate by a solid state reaction, and their conductivities were investigated by ac-impedance spectroscopy. Among the ZrO2-yP2O5 compositions, ZrO2－1.6P2O5 showed the highest proton conductivity of 0.13 Scm-1 at 250°C. The conductivity increased with increasing P2O5 molar ratio and were significantly influenced by heat-treatments in the preparation process. Polytetraflouroethylene (PTFE) was also mixed into these electrolytes in order to improve the mechanical strength and long term durability.

Diammonium Hydrogen Phosphate: An Efficient and Versatile Catalyst for the One-Pot Synthesis of Tetrahydrobenzo[b]pyran Derivatives in Aqueous Media.

ChemInform ◽  
2007 ◽  
Vol 38 (41) ◽  
Author(s):  
Saeed Balalaie ◽  
Morteza Bararjanian ◽  
Masoumeh Sheikh-Ahmadi ◽  
Shohreh Hekmat ◽  
Peyman Salehi
Keyword(s):  
Aqueous Media ◽  
Hydrogen Phosphate ◽  
One Pot ◽  
Diammonium Hydrogen Phosphate ◽  
One Pot Synthesis ◽  
The One ◽  
Diammonium Hydrogen

scholarly journals PENGARUH KONDISI KALSINASI PADA SINTESIS SENYAWA HYDROXYAPATITE

2011 ◽  
Vol 2 (1) ◽  
pp. 13-21
Author(s):  
Lisa Utami ◽  
Syukri Arief ◽  
Novesar Jamarun
Keyword(s):  
Hydrogen Phosphate ◽  
Diammonium Hydrogen Phosphate ◽  
Diammonium Hydrogen

Kalsium fosfat telah menjadi perhatian yang menarik dalam bidang medis dan kedokteran karena biocompatibilitynya yang baik dan struktur serta komposisi kimianya yang sama dengan fasa mineral jaringan keras manusia (tulang dan gigi). Penelitian ini difoukuskan untuk mempelajari faktor yang mempengaruhi morfologi dan komposisi fasa dari senyawa hydroxyapatite dengan menggunakan prekusor diammonium hydrogen phosphate sebagai sumber fosfat serta pengaruh kalsinasi pada suhu 200, 400, 600, 800 dan 1000oC. Produk hidroxyapatite yang dihasilkan dikarakterisasi dengan FTIR, XRD, SEM dan TGA. Hidroxyapatite yang dihasilkan dengan variasi suhu kalsinasi mempengaruhi morfologi dan komposisi fasa dari senyawa kalsium fosfat yang dihasilkan. Fasa yang terbentuk sebelum sampel powder fosfat dikalsinasi dengan (NH4)2HPO4 sebagai sumber fosfat adalah Ca2P2O7.2H2O dengan ukuran kristal 67 nm. Ketika sampel powder kalsium fosfat dikalsinasi pada temperatur 600˚C fasa yang terbentuk dengan menggunakan (NH4)2HPO4 sebagai sumber fosfat adalah hydroxiapatite (HAP) dengan ukuran kristal 8,66 nm Dan ketika sampel dikalsinasi pada temperatur 1000˚C fasa yang dihasilkan yaitu Ca2P2O7 dan Ca3(PO4)2.

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