The phrase "an unknown type of" is correct and usable in written English.
It can be used when referring to a category or classification that is not specifically identified or recognized.
Example: "The researchers discovered an unknown type of organism in the deep sea."
Alternatives: "a mysterious kind of" or "an unidentified variety of".
The findings also supported his thesis that antibiotic treatment of an unknown type of stomach infection caused the changes.
Amos said he was sceptical that the samples found in the Himalayas were those of polar bears but the idea there might be an unknown type of white bear in the region was not out of the question.
Dr. Seilacher, who backs the burrow idea, sees the tunnels as a kind of farm where an unknown type of worm or other organism raises micro-organisms to eat.
Studying Reich's laboratory notes from recently opened archives, Strick presents a detailed account of the bion experiments, tracing how Reich eventually concluded he had discovered an unknown type of biological radiation he called "orgone". The bion experiments were foundational to Reich's theory of cancer and later investigations of orgone energy.
It does not contain an unknown type of bond.
However, this is no longer true when an unknown type of noise signal is present in the test speech.
The protocol for cDNA library generation we describe is independent of locus specific amplification primers and can be used for sequencing any unknown type of influenza A viruses.
Exclusion criteria included subjects once taking diuretics in the 2 weeks before being interviewed (n = 21), persistent diarrhea or vomiting (n = 0), severe renal insufficiency, which was determined using an estimated glomerular filtration rate (eGFR) <60 ml · min-1 · 1.73 m-2 (n = 34) and any self-report of type 1 diabetes mellitus (T1DM) or a history of diabetes of an unknown type (n = 39).
A previously unknown type of corona virus, a group of viruses also responsible for many common colds, causes SARS, and corona viruses tend to spread more easily during cool, dry weather of the sort that southeastern China has been experiencing in recent weeks.
It represents a hitherto unknown type of hominin mtDNA that shares a common ancestor with anatomically modern human and Neanderthal mtDNAs about 1.0 million years ago.
The enigmatic persistent source could be a neutron star within its nebula in a distant host galaxy, a low-luminosity active galactic nucleus, or a previously unknown type of extragalactic source.
