Deficiency production

From antiquity, glues had been made almost entirely from materials of animal or vegetable origin, and were sensitive to moisture, oxidation, and bacterial or fungus attack. Because of these deficiencies, production of durable plywood, for example, was not possible. The modern plywood industry actually owes its growth to the availabiUty of relatively low cost urea adhesives. Plywood and chipboard or wood chip glues are often made at the plywood and chip board mill. 

Aside from the above reforming reactions, a small amount of feed components are converted to polymeric hydrogen deficient products which deposit on the catalyst as "coke." A coke buildup results in activity and selectivity loss which ultimately requires catalyst regeneration. In semi-regenerative operation, the coking rate is maintained at a low level to provide cycles of at least three to six months. In cyclic units, coking conditions are inherently much more severe so that frequent regenerations are required. 

IRAK-/- mice impair the TLR7 pathway and result in a deficient production of IFN a in serum when challenged with R-848 [[135]... 

The clinical findings noted in this patient are most likely caused by deficient production of... 

C, however, and then recooled, the ratio of zinc to sulfur is found to increase very slightly ultraviolet irradiation of this sulfur-deficient product produces an intense blue fluorescence. Further, if one thousandth of 1-percent CuS is thoroughly mixed in with the ZnS before heating, irradiation of the cooled product produces a green fluorescence that persists after the radiation has been removed (phosphorescence). 

Kuivaniemi, H., Korhonen, R. M., Vaheri, A., and Kivirriko, K. I., 1986, Deficient production of lysyl oxidase in cultures of malgnantly transformed human cells, FEBS Lett. 195 261n264. 

B-8) Orotic aciduria. Blocks in steps leading to pyrimidine synthesis may result in deficient production of pyrimidine nucleotides. There may be anemia and immune deficiency (from decreased red and while cell production) and excess orotic acid which may precipitate in the urine. Treatment with uridine may not only help supply the missing pyrimidine, but can decrease the level of orotate by uridine s negative feedback on steps that lead to orotate production. 

Deficient production or action of vasopressin results in polyuria caused by the failure of the renal tubules to reabsorb soiute-fi. ee water. Under normal circumstances, urine output is largely dependent on fluid mtake thus an arbitrary hmit for normal urine output cannot be defined. When urine output is >2.5L/day, an investigation is usually indicated with complete deficiency of AVP, urine output may approach 1 L/hr. If tire thirst response is normal, increased ingestion of fluid (polydipsia) will follow. If access to water is not restricted, plasma osmolality and serum electrolytes will usually remain normal. 

Profile extrusions are the most difficult to make because changes in take-up speed or screw rotational speed alone are not enough to compensate for deficient product dimensions. In the case of sheet and film, if the edges of the sheet are not at the target thickness, they can be trimmed off and sent back to the extruder... 

The oxygen-deficient ferrite was prepared by calcinations of the stoichiometric ferrite in nitrogen atmosphere at different temperatures for desired time. The obtained oxygen-deficient products were covered with liquid paraffin for XRD analysis and chemical determination. 

Procedures should exist for notifying responsible management in a timely manner of regulatory inspections, serious GMP deficiencies, product defects, and related actions (e.g., quality-related complaints, recalls, and regulatory actions). 

The synthesis of light alkenes by modification of the Fischer-Tropsch process is recognised as an important route to high value fuel components (refs. 1,2). The essential requirement of the F-T catalyst is high selectivity towards alkenes, suppression of methane and resistance to coking under conditions which favour the formation of hydrogen deficient products. 

A major chemical effect of y-rays on simple peptides such as the N-acylamino acids under oxygen-free conditions, both in the solid state and in concentrated aqueous solution, leads to formation of labile amidelike compounds which are readily degraded on mild hydrolysis to yield ammonia as a characteristic product. Several classes of nitrogen-deficient products are formed concomitantly with the ammonia. Earlier communications have discussed certain limited aspects of the radiolytic lability of simple peptides in the solid state and in concentrated solutions (9, 10, 18). The radiation chemistry of these systems is more complex than that involved in the radiolysis of simple peptides in dilute oxygen-free aqueous solution under which conditions main-chain degradation is of minor importance (10). In this paper we report detailed experimental evidence... 

The presently available data on product yields from other N-acetyl-amino acids is less complete although the limited data of Table III are consistent in showing for the aliphatic N-acetyl amino acids that the corresponding fatty acid represents the major nitrogen-deficient product. 

Clinical disorders of the thyroid can result from excessive or deficient production of thyroid hormone or from disorders of thyroid growth. 

Rinmann s green consists of mixed ZnO-CoO crystals the green, Co-deficient products (up to about 30% Co) consist of a solid solution of CoO in ZnO (wurtzite lattice). The pink, Co-rich preparations (above 70% CoO) are solutions of ZnO in CoO (NaCl lattice). The intermediate region Is heterogeneous. 

Takigawa, H., Nakagawa, H., Kuzukawa, M., Mori, H., Imokawa, G. (2005). Deficient production of hexadecenoic acid in the skin is associated in part with the vulnerability of atopic dermatitis patients to colonization by Staphylococcus aureus. Dermatology, 211(3), 240-248. 

RPL and structural plastic lumber still is not well accepted and used by the construction industry, most probably due to processing deficiencies, product inconsistencies, and price volatilites although a number of projects already undertaken have proved its value and importance in the sector, for example ... 

Vitamin D is essential for the action of parathormone on osteoclasts whereby bone resorption and a hypercalcaemic response are induced. For this reason parathormone is comparatively inactive in patients with rickets. The mechanism of this synergistic effect is not clear but, since actinomycin D blocks the hypercalcaemic activity of vitamin D, it may be that the vitamin induces the formation of a calcium-binding protein in osteoclasts in a similar manner to its behaviour in the intestine. Certainly excess of vitamin D has effects on bone cells similar to those of PTH in that it mobilizes bone calcium and produces hypercalcaemia. In vitamin D deficiency, production of PTH is greatly increased in an attempt to compensate for the chronic hypocalcaemia. 

Hertz has investigated in great detail the effect of vitamin C deficiency on the regeneration of bone in the fractured fibula of a guinea pig. He found delayed absorption of the fracture hematoma, deficient production of osteoid trabeculae, and increased necrosis of the broken ends. Hertz also attempted to repeat Israel and Frankers refracture experiments, but with no success. Lexer obtained similar results, but he stressed the deficiency of blood supply as a cause of the failure of scorbutic tissues to heal. 

A polypeptide hormdne secreted by the posterior pituitary gland. It is involved in fluid homeostasis, exerting its action in the distal renal tubular cells where it increases passive water reabsorption along the osmotic gradient produced by the countercurrent mechanism. This results in a concentrated urine being produced. Deficient production of the hormone, or failure of the renal tubules to respond to it, results in diabetes insipidus. Alternatively inappropriate ADH secretion can occur in conditions such as infections or as a result of ectopic ADH secretion by a tumour. This results in water retention which reveals itself as hyponatraemia. ADH can be measured by radioimmunoassay. 

A group of hereditary disorders, found mainly in Mediterranean peoples, in which a haemoglobin molecule containing abnormal proportions of subunits is produced. The normal haemoglobin molecule consists of two a and two Ji chains. However, in a-thalassaemias, there is a deficient production of a chains and haemoglobin molecules are produced which are deficient in a chains. Likewise in jS-thalassaemia, there is a deficient production of ji chains, and haemoglobin molecules are produced which are deficient in p chains. The abnormal haemoglobins can be identified by electrophoresis. 

High temperature-high pressure synthesis has been used to make the Th3P4 polymorphs of heavier rare earth sesquiselenides from stoichiometric amounts of the powdered elements. Possibly, they are nonstoichiometric, Se-deficient products. The following compounds were obtained at 1800°C ... 

---