The phrase "a ago" is not correct and cannot be used in written English.
The correct expression is "ago," which is used to indicate a time in the past relative to the present.
Example: "I visited Paris three years ago."
Alternatives: "previously" or "in the past."
In their wake, Walsh swiftly reached the same conclusion as had Charlie Swan aboard Istabraq a decade a ago.
There's a lot fewer kids today in Pilsen than there were 10 years a ago.
A viral video showed a New York City Police Department officer putting Garner into a department-prohibited chokehold, which proved fatal, during an arrest nearly a ago.
After several days of street fighting in the northern Lebanese city of Tripoli, things cooled off a bit about a week and a ago (aside from, of course, sniper fire every hour or so but that's a given here).
Glyma08g21610 and Glyma16g34300, which encode a AGO proteinendoing and a HD-ZIP protein respectively, were predicted target of miR166g and miR168 (Additional file 7).
You can find how long a ago and who's doing what by looking at this section.
The FESEM images further verified a porous microstructure of A-aGO/SA gels, and the pore size decreased and the pore density increased with A-aGO due to the increased junction density at a higher A-aGO content.
Subsequently, A-aGO was added to an aqueous solution of alginate and the gelation behavior of A-aGO/SA in water was studied by rheology when calcium chloride (CaCl2) was used as a physical crosslinking agent.
In the stable gel state, the plateau modulus Ge of A-aGO/SA hydrogels at a fixed concentration of Ca2+ ions depended on A-aGO content according to a parabola equation, Ge = 831.1 + 11740.4 w − 6448.6w2, where w is the weight percentage of A-aGO relative to alginate.
A facile one-pot method was designed and used to synthesize alginate (SA) noncovalently functionalized amino-graphene oxide, A-aGO, which possesses an excellent dispersibility in water.
The presence of A-aGO promoted the sol gel transition of alginate, where the critical gel concentration of CaCl2 (cg) decreased and the critical gel strength Sg increased with increasing A-aGO content, even though the critical relaxation exponent n was almost constant.
