Flow Cytometry
Flow Cytometry measures multiple physical and fluorescent properties of individual cells in suspension as they pass single-file through a laser beam.
O que é CIT
How Flow Cytometry Characterizes Thousands of Individual Cells per Second
Flow Cytometry is a technique that suspends cells in a fluid stream and passes them, one at a time, through one or more laser beams, measuring the light each cell scatters, which reports its size and internal complexity, along with the fluorescence emitted by any fluorescent labels or dyes bound to or within the cell. Because thousands of individual cells are measured per second rather than as a population average, flow cytometry can identify and quantify cell subpopulations, such as by immune cell marker, cell cycle stage, viability or apoptosis status, within a heterogeneous sample. It is used for immunophenotyping, viability and apoptosis analysis, and cell cycle studies across a wide range of cell-based applications.
What sets us apart
We don't hand over a spectrum. We hand over the interpretation.
Any lab can return peaks and numbers. Our report reads the data. Three differences define what we deliver — illustrated below with a real, anonymized case.
Multiple techniques, one integrated report
We don't hand back five loose reports. We cross-reference every technique's results into a single reading — each signal checked against the others — to reach an answer, not a pile of data.
- Contamination investigation — identifying and tracing the source of a foreign species.
- Performance degradation — explaining why a batch behaves outside expectations.
- New supplier validation — proving equivalence before switching.
3 LDPE batches · 4 techniques converge, NMR reveals the difference
In semicrystalline polymer systems, thermomechanical processing variables influence chain conformational dynamics¹. Solid-state NMR resolves chemical environments at the nanometer scale², sensitive to changes not detectable by XRD or FTIR³.
Technical justification anchored in the literature
Every technique choice and every inference in the report is backed by peer-reviewed literature — with citations in the text. The conclusion isn't loose opinion: it's a traceable argument, defensible in an audit and in front of the client.
- Numbered citations linking claim to source
- Official standards and methods referenced per analyte
- Auditable reasoning end to end
Conclusion and expert opinion
The report closes with a clear position, signed by the Principal Investigator: what the data shows, what can't yet be claimed, and the next step. It includes an honest caveat on the limits of inference — what separates a technical opinion from a guess.
- Explicit technical position, not just results
- Inference limits declared honestly
- Next-step recommendation signed by the P.I.
Four techniques confirmed equivalence; only the solid-state NMR revealed the subtle conformational change not distinguishable by conventional QC — a molecular signature consistent with the atypical filtration behavior.
Without the industrial line's parameters, no direct causal correlation can be established — a complementary step is recommended for elucidation.
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Onde a CIT entrega resultados
Aplicações de mercado
FAQ
Frequently Asked Questions about Flow Cytometry
What does flow cytometry measure that a plate reader-based assay cannot?
- Flow cytometry analyzes cells individually, one at a time, as they pass through a laser beam, measuring light scatter (indicating cell size and internal complexity) and multiple fluorescence signals simultaneously for each single cell — providing single-cell resolution and revealing distinct subpopulations within a sample, rather than the single averaged value a plate reader returns for the whole well.
What is the difference between forward scatter and side scatter in flow cytometry?
- Forward scatter (FSC) correlates with cell size, while side scatter (SSC) correlates with internal complexity or granularity (such as organelle content), and plotting the two together is a standard first step for distinguishing different cell populations or identifying debris before deeper fluorescence-based analysis.
How many parameters can be measured simultaneously on a single cell with flow cytometry?
- Modern flow cytometers can measure multiple fluorescence channels simultaneously — often more than ten on advanced instruments — allowing several different fluorophore-labeled markers (such as multiple cell-surface proteins) to be analyzed on the same individual cell at once, which is essential for detailed immunophenotyping.
Can flow cytometry detect apoptosis and cell cycle stage?
- Yes — with appropriate fluorescent markers, flow cytometry can distinguish live, early apoptotic, late apoptotic and necrotic cells (commonly using Annexin V and propidium iodide staining) and can determine cell cycle distribution (G0/G1, S, G2/M phases) based on DNA content staining, both standard applications of the technique.
What sample types are compatible with flow cytometry?
- Flow cytometry requires cells in a single-cell suspension, so it is directly compatible with cultured suspension cells, blood samples, and dissociated tissue samples; adherent cell cultures need to be enzymatically or mechanically detached and resuspended before analysis.
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