The phrase "a fresh leaf" is correct and usable in written English.
It can be used metaphorically to indicate a new beginning or a change in behavior, often in the context of personal growth or improvement.
Example: "After years of unhealthy habits, she decided to turn over a fresh leaf and adopt a healthier lifestyle."
Alternatives: "a new chapter" or "a clean slate".
And when I got sunburnt, Roberto cut a fresh leaf of aloe vera for its soothing gel.
He then places the transparency atop a fresh leaf, sandwiching it all between a pane of glass and solid backing.
Now we may turn a fresh leaf, happy that winter's recession will give way to steady growth, longer, balmier, user-friendly days.
A fresh leaf of Begonia wuzhishanensis (Ku & Jin 2093) was dissected and attached to a stub.
A small piece of a fresh leaf of T. pratense and of the reference standard were chopped together with a sharp razor blade in a Petri dish containing 1 ml ice-cold GPB (general purpose buffer: 0.5 mM spermine × 4 HCl, 30 mM sodium citrate, 20 mM MOPS [MOPS = 4-morpholine propane sulfonate], 80 mM KCl, 20 mM NaCl, 0.5% [v/v] Triton X-100, pH 7.0, according to Loureiro et al. (2007).
Every seven days, the thrips were transferred to new Petri dishes with a fresh leaf.
When you can breathe through your nose, take a fresh, clean leaf of sage, roll it once or twice, and insert stem-side-first a little into your nose, on the side more infected.
Some of the ways your cat might enjoy catnip include: As a bruised fresh leaf, or chopped slightly fresh from the garden.
I cut the flowerheads off the parsley quite quickly, because by doing so, you can persuade the crop to limp on a bit longer, producing fresh leaf.
A topical administration of fresh leaf extract is used to treat scabies for its immediate effect, while 1-2 drofs of this extract are used to treat earache [ 6].
When investigated, it was recognized that a daily dosage of approximately 0.8 of a COS leaf (~2.5 g fresh leaf) is consumed [ 26].
