Copolymer of Phosphono and carboxylic Acid (PCA)Properties: Through the introduction of phosphonic group into carboxylic group, PCA has good dispersion property for scale of calcium carbonate and calcium phosphate in circulating cool water system. It has good scale inhibition for barium sulfate, strontium sulfate and silica scale. PCA has advantages in wide range of water quality, chemical stability, strong chlorine tolerance, etc. PCA can be used as scale and corrosion inhibitor in circulating cool water system and oilfield refill water system. Specification: items index Appearance Amber liquid Solid content % 50.0 min Total phosphor (as PO43-)% 0.5 min Density ( 20℃)g/cm3 1.20-1.30 pH(1% water solution) 3.0-5.0 Usage:When used alone, the dosage of 5-20mg/L is preferred. It can also be used together with organophosphines, copolymer, zinc salt or BTA. Package and Storage: Normally In 250kg net Plastic Drum, IBC drum can also be used as required.Storage for ten months in room shady and dry place. Synonyms: PCA; POCA; dispersant PCA,Copolymer of Phosphono and carboxylic Acid; 1-phenyl-4-amino-5-chloropyridaz-6-one Shandong Taihe Water Treatment Co., Ltd.
Xiwangzhuang town, Shizhong district, Zaozhuang city, Shandong Province, P. R. China
Tel:+86-632-5113066 Fax:+86-632-5112055
Contacted person:
Eric Lee 86-15966754320 E-mail:lee@thwater.net
Website:
http://www.watertreatmentchemical.us
http://www.watertreatmentchemical.ru
http://www.watertreatmentchemical.tw
http://www.watertreatmentchemical.hk
http://www.watertreatmentchemical.in
http://www.thwater.net
Every acid has a constant, called the acid dissociation constant(or Ka), which shows how much the acid dissociates to form ions in water.For an acid, the general dissociation equation is:HA -------> H+ + A-Ka = (concentration of H+) times (concentration of A-) divided by (concentration of HA)The values for concentrations are the values AT EQUILIBRIUM, where the concentrations of all three substances remain the same.If HA was a strong acid, it would completely(or almost completely) ionize in water to form its ions. Therefore, you can say that the concentration of H+ ions in the solution equal the concentration of HA. From this, you can calculate the pH by using the formula pH = - log (H+).If HA was a weak acid, however, things would be different. The acid only partially ionize in water, so you cannot say that the concentration of H+ is equal to the concentration of HA.If you know the value of the acid dissociation constant, you can easily find the concentration of H+ in the solution, and in turn calculate the pH.You know that the amounts of H+ and A- are equal. If you know the concentration of the acid HA you put in, you can calculate the H+ .
Lightning Strikes West - 1940 is rated/received certificates of: USA:Approved (PCA #6081)
Red Planet Mars - 1952 is rated/received certificates of: USA:Approved (PCA #15801)
Ring of Fire - 1961 is rated/received certificates of: Finland:K-16 Norway:16 Sweden:15 USA:Approved (PCA #19770)
step 1) face detection(i.e. is input image a face or not?) step 2) feature extraction for trained set(database) at the same time for input image.(you can use some methods like PCA, ICA etc) step 3) recognization process(i.e comparing input image with trained set using feature vectors obtained in step 2)
Copolymer of Phosphono and carboxylic Acid (PCA)Through the introduction of phosphonic group into carboxylic group, PCA has good dispersion property for scale of calcium carbonate and calcium phosphate in circulating cool water system. It has good scale inhibition for barium sulfate, strontium sulfate and silica scale. PCA has advantages in wide range of water quality, chemical stability, strong chlorine tolerance, etc. PCA can be used as scale and corrosion inhibitor in circulating cool water system and oilfield refill water system.Specification:items index Appearance Colorless or light yellow liquid Solid content % 50.0 min Total phosphor (as PO43-)% 0.5 min Density (20℃)g/cm3 1.20-1.30 pH(1% water solution) 3.0-4.0 Usage:When used alone, the dosage of 5-20mg/L is preferred. It can also be used together with organophosphines, copolymer, zinc salt or BTA. Package and Storage:Normally In 250kg net Plastic Drum, IBC drum can also be used as required.Storage for ten months in room shady and dry place.Keywords: PCA Related Products: Copolymer of Phosphono and carboxylic Acid (PCA)Sodium of Polyaspartic Acid (PASP)Polyepoxysuccinic Acid (PESA)
zinc salt of L-pyrrolidone carboxylic acid. It inhibit the enzyme that catalyses the production of dihydroxytestosterone, a hormone that controls sebaceous gland activity. Zinc is also an antibacterial, and its salts are used to control dandruff.
Portrait Corporation of America (PCA)
The Green Archer - 1940 is rated/received certificates of: USA:Approved (PCA #6016) (Chapter 5) USA:Approved (PCA #6578) (Chapter 1) USA:Approved (PCA #6605) (Chapter 2) USA:Approved (PCA #6606) (Chapter 3) USA:Approved (PCA #6615) (Chapter 4) USA:Approved (PCA #6616) (Chapter 5) USA:Approved (PCA #6625) (Chapter 6) USA:Approved (PCA #6645) (Chapter 7) USA:Approved (PCA #6646) (Chapter 8) USA:Approved (PCA #6651) (Chapter 9) USA:Approved (PCA #6664) (Chapter 10) USA:Approved (PCA #6666) (Chapter 11) USA:Approved (PCA #6669) (Chapter 12) USA:Approved (PCA #6685) (Chapter 13) USA:Approved (PCA #6700) (Chapter 14) USA:Approved (PCA #6710) (Chapter 15)
#1:ikeem k. Johnson-pca #2 DaQuawn Crosby-pca #3: Tim clybourn-pca #4 Matt dawgello-pca #5 josh hoffman-pca #6 lanell buckner-pca
3,4-dihydroxybenzoic acid, also known as Protocatechuic acid, is antioxidant and anti-inflammatory. It could reduce or enhance tumour growth. Similarly, PCA was reported to increase proliferation and inhibit apoptosis of neural stem cells.
u can join zzz not pca
Sky Raiders - 1941 is rated/received certificates of: USA:Passed (National Board of Review) USA:Approved (PCA #6924) (Chapter 1) USA:Approved (PCA #6925 ) (Chapter 2) USA:Approved (PCA #6926) (Chapter 3) USA:Approved (PCA #6927) (Chapter 4) USA:Approved (PCA #6928) (Chapter 5) USA:Approved (PCA #6929) (Chapter 6) USA:Approved (PCA #6930) (Chapter 7) USA:Approved (PCA #6931) (Chapter 8) USA:Approved (PCA #6932) (Chapter 9) USA:Approved (PCA #6933) (Chapter 10) USA:Approved (PCA #6934) (Chapter 11) USA:Approved (PCA #6935) (Chapter 12)
The Amazing Exploits of the Clutching Hand - 1936 I is rated/received certificates of: UK:U USA:Passed (National Board of Review) USA:Approved (PCA #2066) (Chapter 1) USA:Approved (PCA #2067) (Chapter 2) USA:Approved (PCA #2068) (Chapter 3) USA:Approved (PCA #2069) (Chapter 4) USA:Approved (PCA #2083) (Chapter 5) USA:Approved (PCA #2084) (Chapters 6 and 7) USA:Approved (PCA #2086) (Chapter 8) USA:Approved (PCA #2087) (Chapter 9) USA:Approved (PCA #2093) (Chapter 10) USA:Approved (PCA #2094) (Chapter 11) USA:Approved (PCA #2094) (Chapter 11) USA:Approved (PCA #2095) (later: 12) USA:Approved (PCA #2096) (Chapter 13) USA:Approved (PCA #2097) (Chapter 14) USA:Approved (PCA #2102) (Chapter 15)
is pca from zoey 101
A PCA stands for practitioner certified assitant
are u taking abt Pca as in Zoey101 PCA???? if dat's the case iunno