Acid factor

Because of the multiplicity of folic acid factors reported in whole blood (Ul), the microbiologic assay for folic acid in whole blood and serum was regarded as valueless (C2, L8, W9) results based on S. faecalis methods (C2, C3) did not contradict this view. Streptococcus faecalis is inferior to L. casei in its utilization of the PGA polyglutamates... 

Dass CR. Lipoplex-mediated delivery of nucleic acids factors affecting in vivo transfection. J Mol Med 2004 82(9) 579-591. 

Amino acids (Factor B, experiment 1) were supplied as casein peptone 35 g/L (Marcor) or casamino acids 25.8 g/L (Marcor). 

TABLE 8.1. Acidity Factors Scaling Some Proton-Donor Molecules... 

Figure 8.1 Linear dependencies AH° versus P, where AH° is the energy of the dihydrogen-bonded complexes (kcal/mol) and P is the acidity factor obtained for [BH4] in (1) CH2CI2, (2) EtsNBHs and (3) P(OEt3)BH3 in hexane. PFTB is (CFslsCOH, TEE is CF3CH2OH, and HFIP is (CF3)2CHOH. (Reproduced with permission from ref. 6.)...

Variables Anthropogenic Factor Hardness Biological Factor Acidic Factor R2... 

Water absorption is less in the case of cured polyesters containing aromatic acids, compared with those containing aliphatic saturated acids. Factors that contribute towards the flexibility of cured polyesters also tend to promote water absorption. The water sensitivity of cured resins also depends on the relative amounts of terminal hydroxyl and terminal carboxyl groups. 

It is often more convenient to talk about basicities than acidities. In this textbook, the pk b of a base is defined as the pKu of its conjugate acid. For example, according to this book s definition, NH3 has a pk h of 10 (because NH4+ has a pKa of 10) and a pKu of 35. The strength of a base correlates directly with the weakness of its conjugate acid. Factors that increase acidity decrease basicity, and factors that decrease acidity increase basicity. For example, EtS- is less basic than EtO, just as EtSH is more acidic than EtOH. 

Nucleic acids, factors controlling conformation of 83YZ7O1. 

To arrive at the proper amount of mixed acid to be used per charge, it is necessary to multiply the weight of benzene by the acid factor that is used in making the calculations for the D.V.S., provision being made for the presence of a slight excess of nitric acid. 

Several factors ensure rapid and complete sulfonation in this process (1) use of about 25 per cent excess acid, corresponding to about 40 per cent excess over that actually converted to sulfonate (2) distillation of a quantity of water (22.2 moles) only slightly less than the amount of naphthalene (23.5 moles) sulfonated and (3) use of an elevated reaction temperature. At this temperature, water will distill from dilute acid until it has increased to 68 per cent in concentration, which is above the ir concentration (64 per cent) required to sulfonate naphthalene at this temperature. As in every important sulfonation, several modified procedures have been suggested to reduce the acid factor more closely to theoretical, including the use of... 

Figure 4. Correlation between enthalpies (-AH°) of MH -HX and BH -HX complexes and acidity factors of proton donors (/, ). 1 - BH4BU4N 2 - [MeC(CH2PPh2)3]MRuH2CO 3 - WH(CO)2(NO)(PMej)2 4 - ReH2(COXNO)(PMe3)2 5 - BH3NEt3.

Galun suggested the ratio of optical density at wavelengths 435 and 415 nm as a reliable parameter for an estimation of chlorophyll degradation. Its reliability derives from its high correlation with the acid factor used for the measurement of the ratio chlorophyll a/phaeophytin a. 

Table 2.3. Factors of particular importance in birds that affect amino acid requirements Amino acid Factor...

For the degradation of carboxylic acid, factors that may affect the reaction outcome are the ratio of sulfuric acid/carboxylic acid, the reaction temperature and the dilution extent of sulfuric acid. Even though some of the Schmidt degradations of carboxylic... 

The method finds increasing application for the determination of amino acids. Factors affecting the retention of the isoindole derivatives by reversed phase columns have been investigated [335, 337]. Usually columns with Ci8 brushes are used [350]. Numerous gradient elution systems suitable for the separation of amino acid-derived isoindoles have been published their number is still increasing with the availability of new column types. The various references [184, 337, 339-365] are a representative selection of those available, most of which involve minor variations of the basic method. 

For a 10-g sample multiply the number of millilitres of 0.1 N NaOH used in the titration by the appropriate factor for the acid listed below to obtain the percentage of total titratable acid. For a 20-g sample divide the millilitres of 0.1 N NaOH by 2 before multiplying by the acid factor. 

In summary, alkali treatment of casein catalyzes racemization of optically active amino acids. Factors that influence racemization include pH, temperature, and time of treatment. Further studies are desirable to assess (a) how these factors operate in structurally different proteins and (b) the presence of D-amino acids in foods and feeds. (See Table 12 for some preliminary findings). 

Afefa-methoxy phenyloxazoline and secondary and tertiary benzamides 10 are deprotonated at the C2 position by -BuLi and s-BuLi/TMEDA [107,108], whereas metalation occurs exclusively ortho to the methoxy with a-ethoxyvinyllithium/HMPA [109]. These observations indicate that the directing effect of the DMGs result from both kinetic (coordination) and thermodynamic (acidity) factors. 

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