Burr function

CONE, K.C., COCCIOLONE, S.M., BURR, F.A., BURR, B., Maize anthocyanin regulatory gene pi is a duplicate of cl that functions in the plant, Plant Cell, 1993, 5, 1795-1805. 

The hydrate formed by photolysis of this substance is one of the few such products (the others are uracil hydrate, 5-fluorouracil hydrate, and uridine hydrate) that have actually been isolated and compared with authentic material of known structure.7 It is nearly the only product formed in the photolysis, is definitely stable at room temperature and neutral pH, and the thermal reversal to dimethyluracil is nearly quantitative. These properties, as Moore observed, make the reaction ideal for mechanistic investigation. Burr and Park have investigated the reaction mechanism by measuring the photolysis rate of dimethyluracil in mixtures of water with several nonaqueous, nonreactive solvents as a function of water concentration.64 The photolysis rate for 10" iM DMU was found to be the same in water-saturated cyclohexane (about 5 x 10-3M in water) as in dry cyclohexane. The photolysis rate in dry, highly purified dioxane was quite insensitive to water, and it was observed that hydrate formation (measured by thin-layer chromatography and by thermal absorbance reversal) became appreciable only at water concentrations above 40%. 

Fig. 7. The rate of dimethyluracil hydrate formation in acetonitrile-water mixtures as a function of the square of the water concentration (Burr and Park64).

Cone KC, Cocciolone MS, Burr FA, Burr B. 1993. Anthocyanin regulatory gene PI is a duplicate of Cl that functions in the plant. Plant Cell 5 1795-1805. 

Burr and Burr reported in 1929 a new deficiency disease produced by the rigid exclusion of fat from the diet. 1 Rodents fed a fat-free diet showed reduced growth and reproductive failure, accompanied by two prominent changes in the skin, that is, increased scaliness and impaired barrier function.1,2 Reversal of the features of deficiency by administration of linoleic acid (LA), led to the concept of essential fatty acids (EFA) that cannot be synthesized by the higher animals.2 Similarities between the clinical features of EFA deficiency and atopic dermatitis led Hansen in 1937 to discover low blood levels of unsaturated fat in atopic children,3 and he later reported that EFA-deficient infants developed an eczematous rash, which responded to LA supplements.4 Several studies had previously examined a range of dietary oil supplements in atopic dermatitis,5-8 with generally reported benefit. 

Martin, B. R., and Burr, D. B., Structure Function and Adaptation of Compact Bone. Raven Press, New York, 1989. 

Burr WA, Evans SE, Lee J. The ratio of thyroxine to thyroxine-binding globulin in the assessment of thyroid function, CUn Endocrinol 1979 11 333-42. 

Burr and Burr (1929) highlighted the importance of certain fats in the human diet and demonstrated that dietary deprivation of the essential fatty acids was deleterious to health. They concluded that the n-6 PUFAs were most important to function in mammals because their omission resulted in overt systemic dysfunction. Conversely, it has been shown that deprivation of n-3 PUFAs results in subtle dysfunction across a range of behavioral and physiological modalities. 

An exhaustive review of the dielectric properties of polymers at microwave frequencies was carried out in 1985 by Burr [121). In this paper, loss spectra of several polymers were given as a function of frequency or temperature. Figure 8.9 shows the classical evolution of loss spectra with temperature for amorphous and semi-crystalline polymers. 

Scouring and top making (Socks/Garment) The input for this process was raw wool after shearing and the functional output wool top was a semi-processed product of fibres in a form ready for spinning. There were five co-products considered wool top, burrs, nods, sweepings and lanolin. Economic allocation in line with LEAP (2014a) was applied to divide the burdens between these co-products, which allocated 96.8% of burdens to wool tops. 

The importance of essential fatty acids for maintaining renal function was described in one of the classical papers by Burr and Burr [1], who found the most common cause of death in essential fatty acid deficient animals to be renal failure. In spite of this early observation, more than 30 years elapsed before formation of prostaglandins in the kidney was discovered [112,113],... 

Our function generator is of conventional design consisting of a VIA, three latches and a D/A-converter (Burr-Brown DAC 800-1), whose output is fed to an operational amplifier (AD 509) (Fig.4). VIA is programmed to a pulse output-mode, where writing of the lower bits of a potential causes VIA to generate a clock pulse for the latches, which transmit the potential to the D/A-converter. The output range of the converter-amplifier system can be manually selected. 

Burrs are of great industrial relevance as they interfere with the workpiece performance and functionality. Ideally, workpieces would be free of burrs, but, as this is often not the case, burrs can only be reduced either by changing the machining parameters, tool path, or tool. Alternatively, the burrs will have to be removed by time consuming and expensive deburring processes. 

Machining burrs are generally classified by the cutting edge concerned and the mechanism of their formation. The size of burr is a function of the material properties, the effective cutting edge... 

The fineblanking process produces a hardened surface around the formed sections. The resulting value of hardness depends on a distance from the sheared surface and from the die roll side. At the surface, it amounts to an increase of as much as 100% of the core hardness. It decreases as it gets closer to the burr side. This is an advantage when a hardened material is needed for improved function (i.e., gears, cams, holes exposed to pressure and/or wear). 

Marin BR, Burr DB (1989) Structure function and adaptation of compact bone. Raven, New York, pp 106-107... 

Smith and Burr [126] studied the retention of 73 disubstituted benzenes (functional groups included alkyl, nitro, bromo, chloro, carboxyl, nitrile, amide, amino, hydroxyl, methoxy, and phenyl) on a C g column (A = 254nm) usmg a series of methanol/water (1.37 g NaH2P04 with 1.58 g Na2HP04 to pH 7) mobile phases. The V values for these compounds were tabulated for mobile phases ranging in composition from 40/60 to 80/20 methanol/buffer. 

By feeding a diet composed of 16% casein, approximately 4% salts and vitamins and the remainder sucrose. Burr and Burr were able to induce a dietary deficiency syndrome which they later traced to the absence of linoleic acid. The principal deficiency symptoms were a diminished growth rate and a scaly dermatitis seen principally on the feet and tail. An example of a fat deficient rat is shown in Figure 1. Most of the organs of the body are affected by the deficiency and aberrations in structure or function of many tissues have been observed. Reproduction is impaired, the liver becomes fatty., kidney function is impaired, the electrocardiogram is abnormal, and the permeability of the skin toward water is much increased- This leads to evaporative loss of water and of heat from the body accounting for an increased food consumption and a diminished caloric efficiency. 

Burr Burr (1929, 1930) originally observed that essential fatty acids are necessary for the maintenance of normal testicular function in rats. Since then the lipid composition of testes and the metabolism of testicular lipids have been studied by many investigators in an attempt to relate these to the development and function of the testis. 

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