Triazines, applications

Lucas, A.D., M.H. Goodrow, J.N. Seiber, and B.D. Hammock (1995). Development of an ELISA for the N-dealkylated s-triazines application to environmental and biological samples. Food Agric. Immunol., 7 227-241. 

In most cases the half-lives of -triazines in soils with a history of. v-triazine application are considerably shorter than in soils without application history (Ostrofsky et al., 1997 Vanderheyden et al., 1997). 

The interactions between y-triazines and microorganisms have been studied over nearly 50 years and new research has led to important discoveries. The isolation of pure cultures that are able to modify or completely mineralize y-triazines has led to the discovery of new genes and enzymes that are involved in the degradation and mineralization of y-triazines by soil bacteria. Studies carried out in soils with a history of repeated y-triazine applications indicate that rapid degradation and mineralization of atrazine developed in various soils (Barriuso and Houot, 1996 Bradley et al, 1997 Pussemier et al, 1997). 

Specific management practices influence triazine runoff and leaching, including fertilizer type, tillage crop residues, and previous crop history, as well as triazine application, formulation, and placement (Baker and Mickelson, 1994). Tillage systems affect various soil properties, such as soil moisture, temperature, pH, organic matter, water flow, and microbial populations, especially at and near the soil surface. These factors can affect transformation, retention, and transport of herbicides in soil. Interactions of and compensations between these processes can influence our prediction of triazine transport in soil. Therefore, triazine movement is usually studied under one management practice at a time. 

Since a number of triazine tolerant weed biotypes have been discovered through triazine application to crop lands, development of... 

Treated and untreated rats were investigated ophthal-mologically prior to the first triazin application and after 4, 8 and 15 weeks of treatment using a ZEISS slit lamp. 

It has already been mentioned that the degradation of s-triazine herbicides such as atrazinc in soil can be described by two reaction types only, hydrolysis and reductive dealkylation (see Figure 10.3-8). Application oF these two reaction types to a specific s-triazinc compound such as atrazinc provides the reaction network shown in Figure 10,3-12. This can also be vcriFicd by running this example on h ttp //www2,chemie,uni-erlangen.de/semces/eros/,... 

Pyrimido[5,4-e][l,2,4]triazine-5,7-dione, N-methyl-applications, 3, 456 Pyrimido-1,2,4-triazinediones synthesis, 2, 78 Pyrimidotriazines synthesis, S, 338... 

Triazine, 3-amino-6-[(5-nitro-2-furyl)vinyl]-applications, 3, 455... 

Triazines, hexahydro-applications, 3, 529 mass spectra, 3, 466 preferred synthesis, 3, 524 reactions... 

Melamine (I,3,5-triamino-2,4,6-triazine) was first prepared by Liebig in 1835. For a hundred years the material remained no more than a laboratory curiosity until Henkel patented the production of resins by condensation with formaldehyde. Today large quantities of melamine-formaldehyde resins are used in the manufacture of moulding compositions, laminates, adhesives, surface coatings and other applications. Although in many respects superior in properties to the urea-based resins they are also significantly more expensive. 

Synthesis, properties, and applications of nonsymmetric triazinones 99MI26. Transformations of 1,2,4-triazines by the action of C-nucleophiles 98ZOR327. 1,2,4-Triazine A -oxides and their annelated derivatives 98UK707. 

Another synthetic application of an azo coupling reaction was found by Hecken-dorn (1987, 1990). In aqueous acetone a series of dialkyl (chloroacetamido)malo-nates, which are coupling components with a CH group activated by two carbonyl groups, were found to react with arenediazonium ions as in Scheme 12-44. The primary product cannot be isolated because it cyclizes easily to give a 1,2,4-triazin-5-one derivative (12.90). ... 

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