REFERENCES in .NET

Maker ANSI/AIM Code 128 in .NET REFERENCES
REFERENCES
Scan Code 128 Code Set B In Visual Studio .NET
Using Barcode Control SDK for .NET Control to generate, create, read, scan barcode image in .NET framework applications.
141. Sasabe, J., Chiba, T., Yamada, M., Okamoto, K., Nishimoto, I., Matsuoka, M. Aiso, S. (2007). D-Serine is a key determinant of glutamate toxicity in amyotrophic lateral sclerosis. EMBO J., 26, 4149 4159. 142. Csap , J., Varga-Visi, ., L ki, K., Albert, C. (2006). Analysis of the racemization of tryptophan. Chromatographia, 63, S101 S104. 143. Luzzana, U., Mentasti, T., Opstvedt, J., Nyg rd, E., Moretti, V. M., Valfr , F. (1999). Racemization kinetics of aspartic acid in sh material under different conditions of moisture, pH, and oxygen pressure. J. Agric. Food Chem., 47, 2879 2884.
Code 128 Code Set A Generation In Visual Studio .NET
Using Barcode drawer for .NET Control to generate, create Code 128 Code Set C image in .NET framework applications.
CHLOROPROPANOLS
Decoding Code-128 In Visual Studio .NET
Using Barcode reader for VS .NET Control to read, scan read, scan image in VS .NET applications.
Jan Vel ek
Encoding Barcode In Visual Studio .NET
Using Barcode generation for .NET Control to generate, create bar code image in .NET applications.
Institute of Chemical Technology, Department of Food Chemistry and Analysis, Technick 1905, Prague 166 28, Czech Republic
Bar Code Scanner In .NET Framework
Using Barcode recognizer for Visual Studio .NET Control to read, scan read, scan image in .NET applications.
INTRODUCTION
Generating Code 128 Code Set A In Visual C#
Using Barcode generator for .NET framework Control to generate, create Code 128 Code Set B image in .NET framework applications.
The collective term chloropropanols is used to de ne a group of chemical contaminants comprising three carbon alcohols and diols with one or two chlorine atoms that are hypothetically derived from glycerol (1,2,3propanetriol). Six different compounds, (di)chloropropanols, chloropropanediols, and a closely related dichloropropane (Fig. 6.3.1), were identi ed as contaminants of the savory food ingredient acid-hydrolyzed vegetable protein (acid-HVP) in the 1970s and 1980s. Subsequent research in the 1990s revealed the presence of some of these contaminants in soy sauces and similar products manufactured using acid-HVP as an ingredient. Some chloropropanols were also found in a range of processed foods and food ingredients as a result of processing, manufacture, domestic cooking, or migration from packaging material during storage. These products are reviewed in 2.6. The question over the use and safety of acid-HVP was rst raised by Vel ek et al. at the Prague Institute of Chemical Technology in 1978 (1). Their work showed the presence of three chlorine-containing volatiles, namely 1,3dichloropropan-2-ol (1,3-DCP), 2,3-dichloropropan-1-ol (2,3-DCP), and 3chloropropan-1-ol (Fig. 6.3.1). Model studies with glycerol (2), triacylglycerols (2, 3), and natural lipids (4) suggested that glycerol monochlorohydrins, i.e., 3-chloropropane-1,2-diol (often called 3-monochloropropane-1,2-diol, 3-MCPD) and its positional isomer 2-chloropropane-1,3-diol (2-monochloropropaneProcess-Induced Food Toxicants: Occurrence, Formation, Mitigation, and Health Risks, Edited by Richard H. Stadler and David R. Lineback Copyright 2009 by John Wiley & Sons, Inc.
Code 128 Code Set C Maker In VS .NET
Using Barcode printer for ASP.NET Control to generate, create Code 128 image in ASP.NET applications.
CH2 Cl CH OH CH2 Cl CH2 OH CH Cl CH2 Cl
Code-128 Encoder In Visual Basic .NET
Using Barcode encoder for VS .NET Control to generate, create Code 128B image in Visual Studio .NET applications.
CHLOROPROPANOLS
Bar Code Creation In Visual Studio .NET
Using Barcode maker for .NET framework Control to generate, create bar code image in .NET framework applications.
1,3-dichloropropan-2-ol 2,3-dichloropropan-1-ol (glycerol 1,1 -dichlorohydrin) (glycerol 1,2-dichlorohydrin)
Barcode Generation In Visual Studio .NET
Using Barcode printer for .NET Control to generate, create bar code image in .NET framework applications.
CH2 OH CH OH CH2 Cl
Drawing USS Code 128 In VS .NET
Using Barcode generation for Visual Studio .NET Control to generate, create Code 128C image in Visual Studio .NET applications.
3-chloropropane-1,2-diol (glycerol 1-chlorohydrin)
Creating USD - 8 In .NET Framework
Using Barcode encoder for Visual Studio .NET Control to generate, create Code 11 image in VS .NET applications.
CH2 OH CH Cl CH2 OH
Printing Code 39 Extended In Java
Using Barcode drawer for Java Control to generate, create Code 39 Extended image in Java applications.
2-chloropropane-1,3-diol (glycerol 2-chlorohydrin)
UCC - 12 Generation In VB.NET
Using Barcode drawer for Visual Studio .NET Control to generate, create GTIN - 128 image in VS .NET applications.
CH2 OH CH CH2 Cl
Printing Barcode In .NET Framework
Using Barcode maker for ASP.NET Control to generate, create barcode image in ASP.NET applications.
3-chloropropan-1-ol (trimethylene chlorohydrin)
Print Code 3 Of 9 In VS .NET
Using Barcode generator for ASP.NET Control to generate, create USS Code 39 image in ASP.NET applications.
CH2 Cl CH2 CH2 Cl
Decode UPC - 13 In .NET Framework
Using Barcode scanner for .NET framework Control to read, scan read, scan image in .NET framework applications.
1,3-dichloropropane (trimethylenedichloride)
Barcode Generator In Visual Basic .NET
Using Barcode generation for Visual Studio .NET Control to generate, create barcode image in .NET applications.
Figure 6.3.1 Structure, systematic, and trivial names of chloropropanols and chloroalkanes found in protein hydrolysates.
Paint Barcode In Visual C#
Using Barcode maker for VS .NET Control to generate, create barcode image in .NET applications.
1,3-diol, 2-MCPD), may also become the constituents of commercial HVPs. 3-MCPD was later found as a component of HVPs by Dav dek et al. in 1981 (5) and in 1987 its positional isomer 2-MCPD was identi ed (6). Investigations mainly done by industry until 1989 con rmed these ndings and identi ed 1,3-dichloropropane as another minor constituent of acid-HVP (6). In the 1990s, MCPDs and DCPs have been often found in acid-HVPs, soy sauces, and related products (7 14). Recently, it was found that the two chiral chloropropanols derived from prochiral l-glycerol (i.e., 3-MCPD and 2,3-DCP, respectively) occur in acidHVPs as racemic mixtures of their (R)- and (S)-enantiomers (Fig. 6.3.2) (15) (J. Vel ek and M. Dole al, unpublished results). Several other types of chlorine-containing organic compounds were identi ed as the minor constituents of HVPs, i.e., chlorinated sugar decomposition product 5-chloromethylfuran-2-carbaldehyde (16), chlorinated esters of levulinic (4-oxopentanoic) acid (e.g., 3-chloro-1-hydroxy-2-propyllevulinate, 3-chloro-2-hydroxy-1-propyllevulinate, and 3-chloropropyl-1,2-dihydroxy-1,2dilevulinate) (17), and 3-chloro- 5-ene analogs of 4-demethylsterols (sterols) including analogs of sitosterol, campesterol, stigmasterol, and cholesterol (18).
Recognize GS1 - 12 In Visual Studio .NET
Using Barcode recognizer for VS .NET Control to read, scan read, scan image in .NET applications.
OCCURRENCE IN PROTEIN HYDROLYSATES
CH2 OH H C OH CH2 Cl
(S)-3-chloropropane-1,2-diol
CH2 OH HO C H CH2 Cl
(R)-3-chloropropane-1,2-diol
CH2 OH Cl C H CH2 Cl
(R)-2,3-dichloropropan-1-ol
CH2 OH H C Cl CH2 Cl
(S)-2,3-dichloropropan-1-ol
Figure 6.3.2 Structure of 3-chloropropane-1,2-diol and 2,3-dichloropropan-1-ol enantiomers.
6.3.2 6.3.2.1
OCCURRENCE IN PROTEIN HYDROLYSATES Manufacture of Protein Hydrolysates
Protein hydrolysates generally can be divided throughout the world into two large principal groups, chemical hydrolysates of proteins that originated in Europe and enzymatic hydrolysates of proteins that originated in the Far East, respectively (19, 20). 6.3.2.1.1 Acid-Hydrolyzed Vegetable Proteins Chemical hydrolysates of proteins, also called hydrolyzed plant proteins (HPPs) or hydrolyzed vegetable proteins (HVPs), are commonly produced by hydrochloric acid (HCl) hydrolysis of various proteinaceous vegetable raw materials (acid-HVPs). These raw materials include defatted oilseed meals, the by-products from edible oil production (such as soybean meal, peanut meal, etc.), wheat gluten, maize and rice protein, and occasionally certain animal proteins (casein, keratin, etc.). The rst commercial acid-HVPs were produced by Julius Michael Johannes Maggi (1846 1912), a Swiss entrepreneur, an inventor of Maggi spice and precooked soups, and the founder of the food company Maggi. In 1863, he developed a formula to bring added taste to meals (21). This type of material (acid-HVP) has been used constantly as a food condiment and ingredient since that time. The manufacturing process for conventional acid-HVPs varies depending on the desired organoleptic properties of the end product. The source of the raw material, concentration of the acid, the temperature of the reaction, the time of the reaction, and other factors can all affect the organoleptic properties of the nal product (22). Acid-HVPs are traditionally prepared by hydrolysis using approximately 20% (6 M) HCl. Acid hydrolysis is usually carried out at temperatures exceeding 100 C either at the atmospheric pressure or under a given elevated pressure for up to about 8 h until the -amino nitrogen content