TÉLÉCHARGER SSF 0.11

TÉLÉCHARGER SSF 0.11

TÉLÉCHARGER SSF 0.11

A particularly suitable apparatus that may be used is described in co-owned and co-pending US patent application CL, and a system for low ammonia pretreatment using the apparatus of CL is described in co-owned and co-pending US patent application CL Prior to contacting the biomass with an aqueous solution comprising ammonia, vacuum may be applied to the vessel containing the biomass. By evacuating air from the pores of the biomass, better penetration of the ammonia into the biomass may be achieved. The time period for applying vacuum and the amount of negative pressure that is applied to the biomass will depend on the type of biomass and can be determined empirically so as to achieve optimal pretreatment of the biomass as measured by the production of fermentable sugars following saccharification.

Nom: ssf 0.11
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SSF Locate Me 1.7.76 Mise à jour

Si vous conservez une position longue d'actions sur marge, l'EFP vous donne l'opportunité de réduire vos coûts de financement car vous aurez très certainement la possibilité de vendre l'action et d'acheter à terme à une prime inférieure à votre taux de marge.

Si vous êtes short sur l'action, vous recevez des intérêts sur le solde créditeur généré par votre vente short mais ces intérêts sont inférieurs à la prime que vous recevriez si vous vendiez le SSF et que vous rachetiez l'action short.

Si vous disposez d'un excédent de trésorerie sur votre compte et que vous souhaitez augmenter vos gains, vous pouvez acheter l'action et la vendre à terme à une prime supérieure aux intérêts générés par vos liquidités. Possibilité de vendre les SSF short lors d'une tendance baissière.

Lorsque vous détenez un contrat à terme, vous devez déposer une marge. Cette entité a obtenu la note AAA, par conséquent, les intérêts gagnés par le biais de taux d'intérêt implicites sont plus sûrs que de nombreuses autres alternatives de gains sur intérêts.

In another embodiment, said contacting of the biomass is carried out at a temperature of from about 75 C to about C. In still another embodiment, said contacting of the biomass is carried out at a temperature of from greater than 90 C to about C.

The contacting of the biomass with an aqueous solution comprising ammonia is carried out for a period of time up to about 25 hours.

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Longer periods of pretreatment are possible, however a shorter period of time may be preferable for practical, economic reasons. Typically a period of ammonia contact treatment is about 8 hours or less.

In one embodiment, the pretreatment process may be performed at a relatively high temperature for a relatively short period of time, for example at from about C to about C for about 5 min to about 2 hr. In still another embodiment, the pretreatment process may be performed at room temperature approximately C for an even longer period of time of about 24 hr. Other temperature and time combinations intermediate to these may also be used.

For the pretreatment process, the "suitable conditions" such as the temperature, time for contact with ammonia, ammonia concentration, concentration of one or more additional bases, biomass concentration, biomass type and biomass particle size are related; thus these variables may be adjusted as necessary to obtain an optimal product.

A plasticizer, softening agent, or combination thereof, such as polyols e. A plasticizer may be added as a component of the aqueous ammonia solution, as a separate solution, or as a dry component.

The pretreatment or pretreatment reaction may be performed in any suitable vessel, such as a batch reactor or a continuous reactor. One skilled in the art will recognize that at higher temperatures above C , a pressure vessel is required. The suitable vessel may be equipped with a means, such as impellers, for agitating the biomass-aqueous ammonia mixture.

Reactor design is discussed in Lin, K. The pretreatment reaction may be carried out as a batch process, or as a continuous process.

It is well known to those skilled in the art that a nitrogen source is required for growth of microorganisms during fermentation; thus the use of ammonia during pretreatment provides a nitrogen source and reduces or eliminates the need to supplement the growth medium used during fermentation with a nitrogen source.