About Us
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Cell Services
- Cell Line Authentication
- Cell Surface Marker Validation Service
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Cell Line Testing and Assays
- Toxicology Assay
- Drug-Resistant Cell Models
- Cell Viability Assays
- Cell Proliferation Assays
- Cell Migration Assays
- Soft Agar Colony Formation Assay Service
- SRB Assay
- Cell Apoptosis Assays
- Cell Cycle Assays
- Cell Angiogenesis Assays
- DNA/RNA Extraction
- Custom Cell & Tissue Lysate Service
- Cellular Phosphorylation Assays
- Stability Testing
- Sterility Testing
- Endotoxin Detection and Removal
- Phagocytosis Assays
- Cell-Based Screening and Profiling Services
- 3D-Based Services
- Custom Cell Services
- Cell-based LNP Evaluation
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Stem Cell Research
- iPSC Generation
- iPSC Characterization
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iPSC Differentiation
- Neural Stem Cells Differentiation Service from iPSC
- Astrocyte Differentiation Service from iPSC
- Retinal Pigment Epithelium (RPE) Differentiation Service from iPSC
- Cardiomyocyte Differentiation Service from iPSC
- T Cell, NK Cell Differentiation Service from iPSC
- Hepatocyte Differentiation Service from iPSC
- Beta Cell Differentiation Service from iPSC
- Brain Organoid Differentiation Service from iPSC
- Cardiac Organoid Differentiation Service from iPSC
- Kidney Organoid Differentiation Service from iPSC
- GABAnergic Neuron Differentiation Service from iPSC
- Undifferentiated iPSC Detection
- iPSC Gene Editing
- iPSC Expanding Service
- MSC Services
- Stem Cell Assay Development and Screening
- Cell Immortalization
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ISH/FISH Services
- In Situ Hybridization (ISH) & RNAscope Service
- Fluorescent In Situ Hybridization
- FISH Probe Design, Synthesis and Testing Service
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FISH Applications
- Multicolor FISH (M-FISH) Analysis
- Chromosome Analysis of ES and iPS Cells
- RNA FISH in Plant Service
- Mouse Model and PDX Analysis (FISH)
- Cell Transplantation Analysis (FISH)
- In Situ Detection of CAR-T Cells & Oncolytic Viruses
- CAR-T/CAR-NK Target Assessment Service (ISH)
- ImmunoFISH Analysis (FISH+IHC)
- Splice Variant Analysis (FISH)
- Telomere Length Analysis (Q-FISH)
- Telomere Length Analysis (qPCR assay)
- FISH Analysis of Microorganisms
- Neoplasms FISH Analysis
- CARD-FISH for Environmental Microorganisms (FISH)
- FISH Quality Control Services
- QuantiGene Plex Assay
- Circulating Tumor Cell (CTC) FISH
- mtRNA Analysis (FISH)
- In Situ Detection of Chemokines/Cytokines
- In Situ Detection of Virus
- Transgene Mapping (FISH)
- Transgene Mapping (Locus Amplification & Sequencing)
- Stable Cell Line Genetic Stability Testing
- Genetic Stability Testing (Locus Amplification & Sequencing + ddPCR)
- Clonality Analysis Service (FISH)
- Karyotyping (G-banded) Service
- Animal Chromosome Analysis (G-banded) Service
- AAV Biodistribution Analysis (RNA ISH)
- Molecular Karyotyping (aCGH)
- Droplet Digital PCR (ddPCR) Service
- Digital ISH Image Quantification and Statistical Analysis
- SCE (Sister Chromatid Exchange) Analysis
- Biosample Services
- Histology Services
- Exosome Research Services
- In Vitro DMPK Services
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In Vivo DMPK Services
- Pharmacokinetic and Toxicokinetic
- PK/PD Biomarker Analysis
- Bioavailability and Bioequivalence
- Bioanalytical Package
- Metabolite Profiling and Identification
- In Vivo Toxicity Study
- Mass Balance, Excretion and Expired Air Collection
- Administration Routes and Biofluid Sampling
- Quantitative Tissue Distribution
- Target Tissue Exposure
- In Vivo Blood-Brain-Barrier Assay
- Drug Toxicity Services
Semithin Sectioning Protocol
GUIDELINE
Since as thin as 0.5-2 μm, they are also called semi-thin sections, and are an effective positioning method in the ultrathin sectioning technique for electron microscopy. The preparation of semi-thin sections is a common means of sample preparation nowadays. As the clarity and resolution of semi-thin section images are much better than paraffin sections, and the field of view is larger than that of ultrathin sections, it facilitates the acquisition of high-quality light microscopy images. Semi-thin sections are used in various aspects, such as embryology, pathology, etc., and can be considered as a widely used and more common way of sectioning.
METHODS
- Double fixation. The specimen was first fixed with 2.5% glutaraldehyde in phosphate buffer (pH 7.0) for more than 4 hours; washed three times in the phosphate buffer; then postfixed with 1% OsO4 in phosphate buffer (pH 7.0) for 1 hour and washed three times in the phosphate buffer.
- Dehydration. The specimen was first dehydrated by a graded series of ethanol (50%, 70%, 80%, 90%, 95% and 100%) for about 15 to 20 minutes at each step, transferred to absolute acetone for 20 minutes.
- Infiltration. The specimen was placed in 1:1 mixture of absolute acetone and the final Spurr resin mixture for 1 hour at room temperature, then transferred to 1:3 mixture of absolute acetone and the final resin mixture for 3 hours and to final Spurr resin mixture for overnight.
- Embedding and semi-thin sectioning. Specimen was placed in capsules contained embedding medium and heated at 70°C for about 9 hours. Semi-thin sections (1 μm) were sliced under a ultramicrotome and stained with 0.5% toluidine blue.
NOTES
- The embedding surface of the specimen should not be too large, otherwise it will easily cause wrinkles.
- Light movements during embedding to prevent the generation of air bubbles.
- Skin should not touch the reagent as much as possible to avoid discomfort.
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For research use only. Not for any other purpose.