was kept frozen

USAGE SUMMARY

The phrase "was kept frozen" is correct and usable in written English.
It can be used to describe the state of an object or substance that has been maintained at a low temperature to preserve it. Example: "The food was kept frozen until it was ready to be cooked."

✓ Grammatically correct

Science

News & Media

Human-verified examples from authoritative sources

Exact Expressions

60 human-written examples

At Mrs. Shapiro's insistence, Dan's treatment was delayed long enough for him to bank sperm, which for a few hundred dollars a year was kept frozen until he was ready to start a family nine years later.

The New York Times

At Mr. De Groot's farm on a recent afternoon, a worker removed a slender pink tube of sexed semen from a liquid nitrogen canister, where it was kept frozen.

The New York Times

During necropsy, the tissue samples of all the major organs and lesions were collected and split into aliquots for subsequent analyses: one was kept frozen at −20 °C for microbiological and toxicological investigations, one at −80 °C for biomolecular and virological analyses, and the other was preserved in 10% buffered formalin for histological and immunohistochemical (IHC) investigations.

Nature

With informed consent acquired from patients, collection of fasted blood samples was carried out followed by separation of plasma, which was kept frozen at − 70 °C.

Chemistry Central Journal

(f) Human plasma samples were kindly provided by Mansoura University Hospital, Mansoura, Egypt and was kept frozen at -2°C until assay after gentle thawing.

Chemistry Central Journal

A bacterium was kept frozen at −40 °C in nutrient broth [digest of animal tissue (5 g/L), NaCl (5 g/L), beef extract (1.5 g/L), and yeast extract (1.5 g/L) (NB)] supplemented with 20%% (v/v) glycerol.

International Aquatic Research

The solution was divided into three portions, the one part was kept frozen at −80 °C for later citrate synthase (CS) analysis, and the two portions were incubated with either septic or control plasma and kept on ice in a dark environment for 30 min.

Intensive Care Medicine Experimental

The KIX domain was kept frozen at the box center while the pKID was free to move.

Plosone

Choline-containing solutions were freshly made immediately prior to each experiment from a 1 M choline stock solution which was kept frozen at −20°C.

Plosone

Initially it was suggested that this virus could have lain dormant or evolved slowly in non-human hosts for decades, but it is now generally assumed that the virus was kept frozen in a yet unidentified laboratory [7], [8].

Plosone

For the detection of rotenone in plasma, 200 µl of blood was harvested from the tail vein every week and the plasma was kept frozen at −80°C until use.

Plosone

Expert writing Tips

Best practice

When describing scientific procedures, specify the exact temperature at which the substance "was kept frozen" to ensure reproducibility. For example, "The sample was kept frozen at -80°C".

Common error

Clearly state whether a substance should be thawed before use after it "was kept frozen". Lack of clarity can lead to procedural errors in experiments.

Linguistic Context

The phrase "was kept frozen" functions as a passive construction indicating that an object or substance underwent a freezing process and that this state was maintained. As confirmed by Ludwig AI, it describes a state of preservation.

Expression frequency: Very common

Frequent in

Science

87%

News & Media

10%

Formal & Business

3%

Less common in

Encyclopedias

0%

Wiki

0%

Reference

0%

Ludwig's WRAP-UP

In summary, the phrase "was kept frozen" is a grammatically correct and commonly used passive construction, especially in scientific and medical writing. It serves to inform about the storage conditions of a subject, emphasizing preservation through freezing. Ludwig AI confirms its usability and correctness. The phrase sees dominant use in scientific contexts, implying a formal register, but also appears in news and media. When using this phrase, clarity in specifying the precise temperature and any subsequent thawing procedures is crucial. Consider alternatives like "remained frozen" or "was stored frozen" for stylistic variation.

More alternative expressions

Phrases that express similar concepts, ordered by semantic similarity:

remained frozen

Indicates the state of being frozen was maintained over a period.

was stored frozen

Focuses on the act of storing something in a frozen state.

was preserved frozen

Emphasizes the preservation aspect of freezing.

was maintained frozen

Highlights the active maintenance of the frozen condition.

was held in a frozen state

A more formal way of expressing that something was frozen.

was deep-frozen

Specifies a particular method of freezing, implying rapid and thorough freezing.

was cryopreserved

Describes preservation at extremely low temperatures, often using liquid nitrogen.

was flash-frozen

Implies rapid freezing to maintain quality and prevent ice crystal formation.

was conserved by freezing

Highlights the conservation aspect achieved through freezing.

was chilled to a frozen state

Describes the process of cooling something until it becomes frozen.

FAQs

How is "was kept frozen" typically used in scientific writing?

In scientific writing, "was kept frozen" is commonly used to describe the storage conditions of samples or materials to preserve their integrity for later analysis. The temperature is usually specified for accuracy.

What are some alternatives to "was kept frozen"?

Alternatives include "remained frozen", "was stored frozen", or "was preserved frozen", depending on the specific context and emphasis you want to convey.

Is it better to say "was kept frozen" or "was frozen"?

The choice depends on the context. "Was frozen" simply indicates that something underwent freezing. "Was kept frozen" emphasizes that the frozen state was maintained over a period, implying continuous preservation.

What temperature is implied when something "was kept frozen"?

The temperature isn't explicitly implied, so it is important to specify it, particularly in scientific contexts. Common temperatures include -20°C, -40°C, or -80°C depending on the material and storage requirements.