Calcium hydrogen phosphate dihydrate (CHPD) crystal is a well-known urinary crystal. Calcium phosphate is rresent in urinary calculi (stones) as ei ther apatite or brushite. Crystals or calcium hydrogen phosphate dihydrate were grown hy single diffusion gel growth technique in silica g~l s.
In most crystals in urine cases the precipitation of crystals of calcium oxalate, uric acid triple phosphate, calcium phosphate and amorphous phosphates or urates, struvite, aminoacids (cystine), purines (2,8-dihydroxyadenine and xanthine) is caused by transient supersaturation of the urine, ingestion of foods, changes of urine temperature and/or pH which occur upon standing after urination 1) and drugs (e.g. sulfamethoxazole, amoxycillin, ceftriaxone, atazanavir) 2).
Calcium pyrophosphate dihydrate (CPPD) crystal deposition disease, also known as pseudogout and pyrophosphate arthropathy is a rheumatologic disease which is thought to be secondary to abnormal accumulation of calcium pyrophosphate dihydrate crystals within joint soft tissues.
Calcium Carbonate Crystals. Calcium carbonate crystals are yellow to colorless dumbells or spheres with radial striations, found in alkaline urine. They are usually large crystals and can be readily observed at low magnification. Calcium Phosphate Crystals. These are colorless crystals having shape like blunt ended needles or prisms, rosettes.
Dicalcium phosphate is the calcium phosphate with the formula CaHPO 4 and its dihydrate. The "di" prefix in the common name arises because the formation of the HPO 4 2– anion involves the removal of two protons from phosphoric acid, H 3 PO 4. It is also known as dibasic calcium phosphate or calcium monohydrogen phosphate.
one of the urinary type crystals, calcium hydrogen pho sphate dihydrate (CHPD) or brushite, under in vitro cond itions. Calcium stones are most common, comprising 75% of all urinary calculi. Majority of them are calcium oxalate monohydrate (COM) whewellite or calcium oxalate dihydrate (COD) weddelite, which may be pure stones of calcium oxalate (50%) and calcium phosphate (5%), or a mi xture of
Calcium phosphate crystals Phosphate ion and urine pH. Calcium phosphate stone crystals form when calcium atoms combine with phosphoric instead of oxalic acid and produce the calcium phosphate kidney stone. Phosphoric acid is simply a phosphorus atom (shown as the 'P' in the line drawing to the left) with 4 oxygen atoms bonded to it.
Therefore, in this study, the feasibility of optimizing dicalcium hydrogen phosphate dihydrate (DCPD) blocks, as a precursor for OCP block fabrication, under a pH 6 adjusted acetate buffer solution at 70 °C for 2 days was investigated.
The effect of anionic surfactants (single-chained sodium n-dodecyl sulfate (SDS), asymmetric double-chained sodium bis(2-ethylhexyl) sulfosuccinate (AOT), and two-headed disodium oleoamido PEG-2 sulfosuccinate) on the crystallization process of calcium hydrogen phosphate dihydrate (DCPD) was investigated.
2.1.2. Dicalcium Phosphate Dihydrate (DCPD) The DCPD crystal consists of chains of CaPO 4 arranged parallel to each other. 25 Lattice water molecules are inter-layered between the calcium phosphate chains. Anhydrous calcium hydrate phosphate or monetite (DCPA) is less soluble than DCPD due to the absence of water inclusions.
Calcium kidney stones are of two types, calcium oxalate and calcium phosphate. Again, calcium oxalate can further be classified into calcium monohydrate and calcium dihydrate kidney stones. In much simpler words monohydrate contains a single water molecule while dihydrate consist of two water molecules, thus making the dihydrate calcium stone ...
The two forms of calcium phosphate include apatite (sometimes reported as carbonate apatite), which is the crystal type found in bone, or calcium hydrogen phosphate (brushite); the frequency of apatite is much greater than brushite. Calcium phosphate crystals in the urine sediment are typically dark and amorphous.
Dibasic calcium phosphate dihydrate. Slightly soluble in water. Soluble in dilute hydrochloric, nitric, and acetic acid. Incompatible with acids. Minimize contact. No predicted properties have been calculated for this compound. ACD/LogD (pH 5.5): ACD/BCF (pH 5.5): ACD/KOC (pH 5.5): ACD/LogD (pH 7.4): ACD/BCF (pH 7.4): ACD/KOC (pH 7.4):
CALCIUM HYDROGEN PHOSPHATE Prepared at the 19th JECFA (1975), published in NMRS 55B (1976) and in FNP 52 (1992). Metals and arsenic specifications revised at the 63rd JECFA (2004). A group MTDI of 70 mg/kg bw, as phosphorus from all food sources, was established at the 26th JECFA (1982)
7789-77-7. calcium hydrogenphosphate dihydrate. Calcium hydrogen phosphate dihydrate. UNII-O7TSZ97GEP. Calcium monohydrogen phosphate dihydrate
The dicalcium hydrogen phosphate dihydrate (DCPD: CaHPO 4 ·2H 2 O) block was evaluated as a precursor of OCP. DCPD contains both Ca and PO 4, whereas CSH contains only Ca. Therefore, a feasibility study of the DCPD block can be regarded as an initial step towards the feasibility study of calcium phosphate as a precursor for OCP block fabrication.
The effect of aqueous seed extract of Ensete superbum (Roxb.) Cheesman on in vitro crystallization and growth patterns of calcium hydrogen phosphate dihydrate (CaHPO 4 ·2H 2 O, CHPD) crystals was studied using single diffusion gel growth technique.
Calcium phosphate crystalluria. There are several different types of calcium phosphate crystals. They seem to be differently described as amorphous phosphate and calcium phosphate. Excepting brushite the calcium phosphate crystals tend to form themselves in alkaline urine.
PDF | The purpose of the study is to explore the possible morphological features of calcium hydrogen phosphate dihydrate (brushite) crystals at a glass slide. The study was carried out on a glass ...
Calcium pyrophosphate dihydrate crystal deposition disease (CPPD) occurs when these crystals form deposits in the joint and surrounding tissues. The crystal deposits provoke inflammation in the joint, which can cause the joint cartilage to break down. The disease may take a few different arthritis ...
Calcium hydrogen phosphate dihydrate (CHPD or DCPD) is found quite frequently in urinary calculi (stones). The CHPD crystals were grown by the single diffusion gel growth technique in sodium metasilicate gel. The crystals were found to be having platelet and broad needle type morphologies. The crystals were analyzed by FTIR spectroscopy.
1. Introduction. Dicalcium hydrogen phosphate anhydrous (Monetite, CaHPO4, DCPA) has been used in mixtures with other compounds both inorganic and organic for the preparation of calcium phosphate cements (CPC) applied in bone replacement already from the very early development of CPCs in 1974,, .
Because calcium hydrogen phosphate is incongruently soluble, it is typically contaminated with various amounts (6-10%) of dicalcium phosphate and free phosphorus acid resulting from in-process disproportionation of the monocalcium salt.
The name carbonate-apatite is derived from the fact that carbonate ion may displace phosphate ion in some uroliths. Less common forms of calcium phosphate include calcium hydrogen phosphate dihydrate (Brushite), tricalcium orthophosphate (Whitlockite), and octacalcium phosphate.
Parks and colleagues found that the calcium phosphate fraction in stones had increased over the last 3 decades, along with an increase in urinary pH and brushite saturation. 11 Mandel and colleagues studied 33,198 stones from the National Veterans Administration Crystal Identification Center in 2002. 12 Compared to a 1989 survey of crystal ...
Calcium hydrogen phosphate dihydrate (CHPD) is found quite frequently in urinary calculi (stones). The CHPD crystals were grown by the single diffusion gel growth technique in sodium metasilicate gel. The crystals were found to be having platelet and broad needle type morphologies. The crystals were analyzed by FTIR spectroscopy.
The crystal structure of Dicalcium phosphate crystals is triclinic. The IUPAC name of this compound is Calcium hydrogen phosphate dehydrate. The reactants used for the production of Dicalcium phosphate include calcium hydroxide (Ca(OH) 2) and phosphoric acid (H 3 PO 4). The production process include the neutralization of calcium hydroxide by phosphoric acid that gives Dicalcium phosphate as a dehydrate precipitate.
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