Phosphate defidency

In the presence of suffident metal ions such as zinc, phosphate defidency is known to inhibit growth and increase yields of dtric add. However, phosphate is added not only as a source of phosphorus but also as phosphoric add to addify the medium. Restricted growth but good citric add yield is also achieved by maintaining iron and zinc defidency hence low phosphate levels are not necessary. 

In the presence of suffident metal ions such as zinc, phosphate defidency is known to phosphatB inhibit growth and increase yields of dtric add. However, phosphate is added not cmly... 

Most nitrogen-defident mulches are also phosphorus-deficient and may require small applications of phosphate fertilizers as well as nitrogenous fertilizers. The likelihood that mulches may deplete phosphates is, however, less than in the case of nitrogen. 

Yager C, Gibson J, States B, Elsas LJ, Segal S. Oxidation of galactose by galactose-1-phosphate uridyltransferase-defident lymphoblasts. J Inherit Metab Dis 2001 24 465-476. 

Ororid i -5 -phosphate pyrophosphorylase (EC 2.4.2.10) and orotidme-5 -phosphate decarboxylase (EC 4.1.1.23). Abnormally high urinary orotic add. Severe megaloblastic anemia. Marked retardation of growth and development, and slight mental retardation. [A gross defidency of 2 enzymes of pyrimidine biosynthesis]... 

Ca-P has a Ca P ratio of 1.67 (hydroxyapatite). With a decrease of the Ca to P ratio, other Ca-defident phases occur like tricalcium phosphate (TCP, Ca P ratio 1.50), octacalcium phosphate (OCP, Ca P ratio 1.33), dicalcium phosphate anhydrous (DCPA or Monetite, Ca P ratio 1.00), and dicalcium phosphate dihydrate (DCPD or Brushite, Ca P ratio 1.00). Most of these caldum deficient compounds are used as raw material for sintering procedures for ceramics, or as ingredients for example, Ca-P cements. TCP and HA will be discussed more in detail, since these materials are most used for biomedical applications. 

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