Mannitol occurrence

Normally, however, the reaction involving the formation of hydroxy-methylfurfural proceeds less readily than does the hydrogenation of glucose and fructose to mannitol and sorbitol, but its occurrence is detected by the fact that tetrahydrofuran derivatives have been isolated from the hydrogenation products. Thus, we have isolated tetrahydrofuran 2,5-dicarbinol (identified as its ditosyl derivative), 5-methyltetra-hydrofurfuryl alcohol and 2,5-dimethyltetrahydrofuran (VII) together with hydrogenolysis products of these compounds. 

Alkyl derivatives of D-glucitol and D-mannitol also display a wide variety of mesophases (Fig. 3c, [11]). Predictive rules for the occurrence of various phases in relation with geometric parameters were established for 3 c... 

Properties and Occurrence of Free Sugar Alcohols, D-Glucitol, D-Mannitol, RIbItol, Xylltol, and n-Arablnltol... 

Despite being considered one of the most toxic antimicrobial drugs in use today [103], AmB remains the drug of choice for otherwise uniformly fatal systemic fungal infections [4,5]. Consequently, it will remain in use despite the predictable occurrence of severe systemic and renal toxidfy. Therefore, therapeutic interventions that decrease AmB toxicity assume critical importance. Among the early interventions that were examined was the administration of mannitol. Studies suggested a protective effect of mannitol in dogs and renal transplant recipients [104-106]. Unfortunately, these were either case-reports or poorly controlled since later reports failed to detect any protective effect of... 

Table VIII. Occurrence of Choline, Choline Sulfate, Mannitol and Ergosterol... 

There have been few reports of the occurrence of D-mannitol in the combined form. A monoacetate and mono- and diglucosides of D-mannitol have been found in algae 42h)y and mannitol may be a terminal unit in the polysaccharide laminarin 2c). 

The Shibata group reports the occurrence of a number of anthraquinones in the cultivated mycobionts of Xanthoria mandschurica (Zahlbr.) Asah., X.fallax (Hepp) Arn., and an unidentified Caloplaca species (Nakano et al., 1972). The mycobionts of Ramalina crassa (Del.) Mot. and/ , subbreviuscula Asah. convert ribitol into arabitol and mannitol (Komiya and Shibata, 1971). 

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