The phrase "appearance of the upper" is grammatically correct and can be used in written English.
It can be used in contexts discussing visual aspects or characteristics of something that is positioned above or higher up.
Example: "The appearance of the upper section of the building was striking, with its modern design and large windows."
Alternatives: "look of the upper" or "visual of the upper".
The archeological materials extracted from those layers display the appearance of the Upper Paleolithic tools and stone knapping technology, while the Middle Paleolithic technologies were still in use.
External appearance of the upper surface of the composites was documented by photography prior to fixing in formalin.
He observed that patients can be split into three groups, depending on the appearance of the upper lobes.
Nevertheless, the estimates seem to match best the appearance of the Upper Palaeolithic Dabban industry in Cyrenaïca, as suggested before [ 15, 23].
To this purpose we used as end-point disease-progression (DP) defined as the appearance of the upper stages according to the Binet (Binet et al, 1981) classification during the treatment-free period.
Assuming the subjective appearance of the upper anterior teeth as an initial impression of the mothers' dental condition, 64 (62.7%) mothers revealed a "fairly good" condition, and 38 (37.3%) a "fairly bad" condition.
The primary end-point was patient-reported symptoms in the throat and mouth, as well as visual appearances of the upper tracheal mucosa the day after tracheal intubation.
In addition, the appearance of the mother's upper anterior teeth was assessed subjectively by the examiner, and served as a proxy measurement of mother's attitude towards dental health.
This gives the central region of the face a depressed, or "dished," appearance, and the upper part of the nasal profile is obscured by the cheek when the specimen is viewed from the side.
For sintered glass, (treated with octadecyltrichlorosilane to obtain an oil-wet surface), after the sample was saturated with water (nonwetting fluid), it was clearly possible to follow its appearance at the upper face of the core sample.
HPs were characterized by saw-toothed appearance in the upper part of the crypt and normal proliferative zone to the base of the crypt.
