The phrase "a primary origin" is correct and usable in written English.
It can be used when discussing the main source or starting point of something, such as an idea, concept, or phenomenon.
Example: "The researchers identified a primary origin for the cultural practices observed in the community."
Alternatives: "a main source" or "a principal origin".
A relatively positive (−1.3‰ ± 0.4‰ ref. 48) carbon isotope signature of the fumarolic CO2, as well of the CO2 involved in the past deposition of hydrothermal calcites48 indicates a primary origin of the CO2 from a mantle metasomatised by crustal fluids34, 49, 50.
These observations provide evidence for a primary origin of the observed remanences.
A primary origin for these inclusions was inferred based on their distributions as three dimensional groups or occurrence as comparatively large, isolated inclusions.
Instead, the data suggest that sporadic epithelial ovarian carcinoma has either a monoclonal or a dual primary origin.
The thyroid area with compact folicular structure presents intense immunoreactivity for thyroglobulin (e) Open image in new window Fig. 2 a d Metastatic ovarian carcinoid of unknown primary origin in a 23-year-old female complaining of pelvic pain and amenorrhoea.
Whilst a fraction of these particles may be due to new particle formation with limited growth (so called "apple" new particle formation events25), or open ocean nucleation26,27, an Arctic ultrafine primary origin can also not be ruled out9,28.
Co-localization of a-EpCAM1 and ER-TR7-staining in the aging thymic medulla (Figure 1D) confirms that in the 9 month old thymus there are cells expressing the EpCAM1 marker as a legacy of their primary origin, and also secreting ER-TR7-positive extracellular matrix components, a function conventionally attributed to fibroblast cells.
Patients who presented with carcinoma of the nasopharynx (regardless of WHO type), with WHO performance status two and above, or a tumour of unknown primary origin are not included in this report.
Cancer of unknown primary origin (CUP) is a classification given to a malignant neoplasm when a metastasis is discovered but the source of the primary tumor remains hidden.
We studied clinical phenotyping and TEAD1 expression in mice and humans to gain a better understanding of the primary origin in the pathogenesis of circumpapillary dysgenesis of the pigment epithelium.
Some of the fine dolomite cement was also interpreted to be of primary origin in a shallow lacustrine environment (Mazzullo 2000).
