The phrase "additional envelope" is correct and usable in written English.
It can be used when referring to an extra envelope that is included for a specific purpose, such as mailing or packaging.
Example: "Please place the documents in the additional envelope provided for your convenience."
Alternatives: "extra envelope" or "supplementary envelope".
Third, it is not possible to say if the outermost tissue of the reproductive units of Siphonospermum represents an additional seed envelope like in Gnetum [ 24], or an outer parenchymatous zone of a single seed envelope like in most species of Ephedra [ 34].
Viral infectious particles, or virions, are composed of a nucleic acid (DNA or RNA) surrounded by a protein shell (the capsid) and sometimes by an additional lipid envelope.
The third reminder letter included an additional prepaid envelope.
Four additional cell envelope genes are essential in S. aureus: fabH, fabI, ywpB and yuxO.
Some additional replacement envelopes were also prepared, which were separately numbered, with a listing indicating which of these envelopes should be used in the event that a child's envelope was lost or damaged, None of the investigators, health care centre staff or laboratory staff participating in the trial had access to the code during the trial.
After 45 patients were included in the study, an independent researcher not involved in the study made additional sealed envelopes for the patients replacing the excluded patients, randomized and sequentially numbered to conceal treatment allocation for the observer.
Additional sealed envelopes will remain in custody of the study centre, and will remain sealed if not in medical emergencies (in this case, the date and the reasons for doing so will be recorded in the electronic case report form (eCRF), in the participant's medical record and on the randomisation envelope; whenever possible, the PI will be contacted before the blind is broken).
Additional support for envelope localization was the EPR spectrum of purified chloroplast envelope membranes reported by Jäger-Vottero et al. [ 43], which was essentially identical to the EPR spectrum of recombinant CAO and of CAO recovered from Arabidopsis and Chlamydomonas cells with antibodies.
In order to carry out multiple recycling passes within the design envelope, additional neutron moderation is required and achieved by reducing the fuel pellet diameter by about 13%, thus keeping the assembly design compatible with current PWR core internals.
