The phrase "an additional specimen was" is correct and usable in written English.
It can be used in contexts where you are discussing the inclusion or mention of another specimen in a scientific, research, or analytical setting.
Example: "In the study, an additional specimen was collected to ensure the accuracy of the results."
Alternatives: "a further specimen was" or "one more specimen was".
One additional specimen was weakly positive, i.e. only in one ELISA and Western blot system.
Though a strict application of sequential sampling would require a single additional specimen be analysed if required, it would be more practical to increment by five.
The sequence of these additional specimens was found to be identical to the original sequences, supporting the view that these samples are not contaminations.
A few additional specimens were donated (6%), confiscated from illegal traders (4%), or obtained from skins of birds collected after 1995 (2%).
Preliminary positives were then repeat-tested with a new extraction, when an additional specimen aliquot was available.
Additional specimens were collected from a subset of participants to assess PCE body burden before (Friday) and after (Monday) a non-working two-day weekend, for three sequential weeks (Table 2).
Thus, 5 additional specimens were assigned to N. a. anomalus and 1 to N. a. milleri (Additional file 1: Table S1).> Using a species tree approach, the topology for the four detected lineages was estimated with *BEAST [ 57] using 14 independent loci corresponding to the 13 introns plus the cytochrome b gene.
three additional specimens were found in 2004. in addition to records from roadkilled specimens at three further sites.
However, additional specimens were not available for confirmation; in addition, S. maltophilia is ubiquitous in nature and, despite our negative controls, may in theory contaminate laboratory reagents.
Additional specimens were located directly above this site on a plateau between South Ridge Peak and Observation Point.
