RA product

Both fragranol and grandisol skeletons were obtained by treatment of racemic butyl 6,7-epoxygeranyl sulfide with butyllithium in 7V,7V,Ar, 7V -tetramethylethylenediamine (TMEDA). In addition to the trans-product trans-16 (fragranol skeleton) and the ra-product m-16 (grandisol skeleton), a cyclopentane derivative was also isolated.16... 

Having discovered the identity of the reaction products by gc-ras, product ratios for a series of reactions were obtained using simple gc and we were able to find optimum conditions for generation of compound A. 

Gulbis B, Galand P. Immunodetection of the p21-ras products in human normal and preneoplastic tissues and solid tumors A review. Hum Pathol 1993 24 1271-85. 

Phenylsulfinylcarbene, generated from phenyl diazomethyl sulfoxide, undergoes addition to alkenes to form phenylsulfinylcyclopropanes. This reaction is stereospecific [> 97% of trans-product from (/s)-but-2-ene and > 99% ra-product from (Z)-but-2-ene] and highly stereoselective [cisjtrans 34 and > 99 for additions to cyclohexene and (Z)-but-2-ene, respectively].23 The sulfinylcarbene reacts with alkenes in the singlet state. 

Reagent Catalyst Time [h] Temp. ra Product Yield [%] syn/atiti ee (sytt) [%]... 

The use of a hindered borane can increase this selectivity to a very satisfactory level. 2,4-Di-methylbenzocyclohepten-3-one also gives preferentially the ra,ra-product with lithium aluminum hydride in this case the alternative isomer was undetectable by high-field H NMR130. 

An active oncogene encodes the protein product having specific activity to induce transformation. The oncogene products are located either in the cytoplasm or in the nucleus. The src, yes, abl, erb B, erb BZ, and ras products are located in the cytoplasm, while the fos, jun, myc, and myb products are found in the nucleus (Fig. 2). The oncogene functions are summarized in Table 1. 

Samain E, Chazalet V, Geremia RA. Production of O-acetylated and sul-fated chitooligosaccharides by recombinant Escherichia coli strains harboring different combinations of nod genes. J Biotechnol 1999 72 33-47. 

Obviously Case (c) gives the smallest current and therefore the highest RA product. Thus we want a — p back contact at a distance h<4L from the... 

To lower C/A one uses as lightly doped material as possible on at least one side of the junction, makes a graded junction, and/or operates the detector under a reverse bias voltage [4.10]. However, there are limits to these approaches, because too wide a W leads to nonnegligible gr current, and the RA product may lower in proportion to the reduction of the doping level. We will consider these tradeoffs further when analyzing detector materials in the next subsection. 

Fig. 4.5. RA product vs carrier concentration for Pbo gSng jTe p-n junction photovoltaic detector of Fig. 4.4 at 77 K...

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