The phrase "at once determined" is correct and usable in written English.
It can be used to convey that someone made a decision or reached a conclusion immediately or without hesitation.
Example: "Upon hearing the news, she was at once determined to take action and make a change."
Alternatives: "immediately resolved" or "instantly decided".
It reveals an artist who is at once determined and casual in his artistic undertakings.
This at once determined the capital role that the Dominicans would play in university studies.
It's a tale of American demands: Koons is at once determined to be pleased like a child and hungry to be satiated as an adult.
He is at once determined to follow through with his decision, melancholy that he has to, and angry with himself for not developing a skill vital to big-time stable operators: he could not train his owners.
He famously claims that at the age of 10 he discovered the poetry of Hart Crane at his local library in the Bronx, and at once determined to become a literary critic.
Stretched across a silvery, wooden American flag, Muhammad Ali's wide-eyed image is America, a visual parable: he looks at once determined and full of wonder, sweat-soaked from putting in work and somehow eternally gracious.
Once determined to be at increased risk, all eligible women were offered the opportunity to take tamoxifen, thus minimising potential selection bias and as such our results may therefore reflect an approximation of uptake expected in this population of premenopausal women attending FHCs.
Extracts were centrifuged at 5000 rpm for 10 min at 4°C and the soluble fraction, once determining protein concentration by the Lowry method, stored at −20°C until use.
The number of loci that can be analysed at once is determined by the number of probes in the probe set.
When she recorded them, the following day — a muttered "Stpdfkng dress!" and a "Holy shit!" — she sounded at once furious, determined, and hopeful.
Haplotypes were determined using a sliding-window approach, where three consecutive SNPs were evaluated at once to determine the presence of any significant three-SNP combinations.
