Author Archive: Guanliyuan

Capped 0.2mL 8-Strip PCR Tubes | RNase/DNase-Free

Large EVA-Base Shed Cell Collector: Forensic Sampling

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The large shed cell collector with EVA base is a forensic tool for wide-area sampling, using a flexible EVA base to recover shed cells from large surfaces efficiently.

Core Content

  • Design: Spacious textured sampling surface + lightweight EVA base (flexible to fit curved/large areas like furniture, vehicle seats).
  • Usage: Press EVA base firmly on target area; glide in overlapping strokes; transfer cells to collection card/tube.

Key Features

  • Wide sampling area: Covers 20-30 cm² per use, cutting time for large-surface evidence.
  • EVA base advantage: Flexible yet durable, maintains contact pressure on uneven surfaces.
  • High cell yield: Textured surface traps more shed cells than small collectors for large traces.
  • Forensic-ready: Sterile packaging, compatible with DNA extraction workflows.

Application Scope

  • Crime scenes: Large surfaces (car interiors, sofas, floors) for shed epithelial/blood cells.
  • Mass casualty events: Sampling large personal items or debris for victim identification.
  • Property crimes: Wide-area evidence on stolen furniture, electronics casings.

Rapid-Dry Flocked Swabs: Trace DNA Collect & Preserve

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Rapid-dry flocked swabs are specialized for trace DNA collection, with fast-drying tech ensuring long-term sample preservation for forensic analysis.

Core Content

  • Design: Ultra-fine 3D flocked nylon head (max cell capture) + breathable shaft; enables 15-30min air-dry time.
  • Usage: Swab trace DNA surfaces (touch, saliva); air-dry fully; store in moisture-proof bag with desiccant.

Key Features

  • Rapid drying: Minimizes microbial growth and DNA degradation post-collection.
  • High trace yield: Flocked head traps 40-60% more cells than standard cotton swabs.
  • Long-term preservation: Stable DNA storage for 12+ months at room temp when dried.
  • Forensic-ready: Sterile, single-use, supports chain-of-custody protocols.

Application Scope

  • Crime scenes: Touch DNA on weapons, electronics, door handles, clothing.
  • Cold cases: Re-sampling old evidence for previously undetected trace DNA.
  • Forensic labs: Processing low-level DNA samples for profiling and court evidence.

Sterile Swabs for Blood, Saliva & Semen Collection

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Sterile biological evidence extraction swabs are specialized tools for collecting blood, saliva, and semen, ensuring forensic sample integrity for DNA analysis.

Core Content

  • Design: Flocked/foam heads (max sample retention) with breakable handles for easy tube transfer; pre-sterilized.
  • Usage: Swab target evidence (bloodstains, saliva traces, semen); place head in preservative tube; label and transport.

Key Features

  • Sterility: Single-use, tamper-evident packaging prevents contamination.
  • Versatility: Works for blood, saliva, semen on porous/non-porous surfaces.
  • High yield: Flocked heads retain 30-50% more cells than cotton swabs.
  • Forensic-compliant: Supports chain-of-custody and court admissibility.

Application Scope

  • Crime scenes: Homicides, assaults, sexual offenses for biological evidence.
  • Forensic labs: Processing trace evidence from weapons, clothing, surfaces.
  • Cold cases: Re-sampling old evidence to recover viable DNA.

Small Shed Cell Collector: Forensic Microbial Tool

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The small shed cell collector is a compact, high-efficiency tool for forensic microbial sampling, recovering trace cells from crime scenes for accurate microbial DNA analysis.

Core Content

  • Design: Miniature textured sampling head with ergonomic grip, fits tight spaces like tool crevices or fabric folds.
  • Usage: Press head firmly on target, swab in circular motions; transfer to microbial transport medium immediately.

Key Features

  • High efficiency: Captures 40% more microbial cells than standard swabs via optimized surface texture.
  • Compact size: Accesses narrow areas unreachable by larger sampling tools.
  • Contamination control: Single-use, pre-sterilized packaging prevents cross-contamination.
  • Rapid processing: Compatible with lab microbial DNA extraction workflows.

Application Scope

  • Forensic microbiology: Crime scenes (weapons, clothing) for microbial evidence like pathogens.
  • Cold cases: Re-sampling old evidence to detect microbial traces missed earlier.
  • Biological threat investigation: Sampling suspicious surfaces for harmful microbes.

Dual-Tip Forensic Swabs: DNA Collection & Storage

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Dual-ended forensic swabs have two specialized heads, optimizing DNA collection and preservation from crime scene biological evidence efficiently.

Key Content

  • Heads Design: Flocked nylon (trace DNA) and foam/cotton (liquid/large samples) for diverse evidence.
  • Usage: Swab targets, snap handle to place heads in separate tubes, label and transport at 2–8°C.

Core Features

  • High efficiency: One tool for two samples, cutting processing time.
  • Low contamination: Sterile packaging and separate tubes reduce risks.
  • Enhanced yield: Flocked head recovers 30–50% more trace DNA.
  • Court-admissible: Meets chain-of-custody standards.

Application Scope

  • Violent crimes: Weapons, clothing in assaults/homicides.
  • Property crimes: Burglary tools, stolen items, entry points.
  • Cold cases: Re-sampling old evidence for hidden DNA.
  • Disaster ID: Personal items/remains in mass casualties.

Solid Sample Grinding: Bone & Dried Plants

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Solid sample preparation is crucial in forensic, environmental, and biological research for accurate analysis. Bone and dried plant grinding techniques are essential for extracting DNA, proteins, or other analytes from tough biological materials, making it easier for researchers and forensic scientists to work with these challenging samples.

Grinding Techniques for Bone and Dried Plants:

  1. Bone Grinding:

    • Mechanical Pulverization: Use of specialized grinders to crush bone into fine powder, which helps in DNA extraction and isotopic analysis.

    • Cryogenic Grinding: Freezing bone samples with liquid nitrogen before grinding to preserve cellular integrity and prevent heat degradation during grinding.

    • Dry Grinding: Grinding bones in a dry state using a mortar and pestle or grinding mills for easier handling of small fragments.

  2. Dried Plant Grinding:

    • Blade Grinding: Dried plants are cut into smaller pieces before being ground using blades or hammer mills, which ensures efficient breakdown of fibers and tissues for analysis.

    • Ball Milling: Dried plant samples are placed in a ball mill, where high-speed rotation helps reduce plant material into fine powder, suitable for chemical and molecular analysis.

    • Cryogenic Milling: Similar to bone grinding, this method involves freezing the plant material to preserve its structure and prevent degradation during grinding.

Key Features:

  • Efficient Sample Breakdown: These techniques ensure that both bones and plant materials are adequately processed for subsequent analysis, such as DNA extraction.

  • Preservation of Integrity: Methods like cryogenic grinding help preserve the biological integrity of the samples.

  • Versatility: Applicable for a wide range of solid biological samples, ensuring broad use in forensic, environmental, and medical studies.

  • Optimized for Accuracy: Fine grinding increases the surface area of the sample, improving the accuracy of subsequent analyses.

Scope:
These grinding techniques are widely used in forensic labs, archaeological studies, environmental testing, and plant biology research, where bone and dried plant materials need to be processed for molecular analysis, toxicology, and other chemical tests.

Evidence Grinder: Usage Guide

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Biological evidence grinding devices are specialized tools used in forensic and medical settings to process biological samples, particularly when DNA extraction is required. These devices help break down tissues or biological materials into smaller particles to enhance the efficiency of analysis.

Application of Biological Evidence Grinding Devices:

  1. Forensic Science: Used to grind and prepare biological evidence (such as bone, tissue, or hair) for DNA extraction in criminal investigations, enabling the identification of suspects or victims.

  2. Medical Diagnostics: In clinical settings, these devices help prepare tissue samples for genetic testing, biopsy analysis, or pathogen detection.

  3. Environmental Analysis: Used for grinding samples of soil, water, or plant materials suspected of containing biological evidence for contamination studies or ecological research.

Operational Guidelines:

  1. Preparation:

    • Clean and sterilize the grinding device to avoid contamination.

    • Ensure the sample is properly handled and placed inside the grinding chamber.

  2. Grinding Process:

    • Activate the device according to the manufacturer’s instructions, adjusting settings based on the sample type.

    • Monitor the sample size and grinding time to achieve the desired particle size without damaging the evidence.

  3. Post-Grinding Handling:

    • Collect the processed sample carefully to avoid loss of material.

    • Store or transport the processed biological material in sterile, secure containers to prevent contamination.

  4. Maintenance:

    • Regularly clean and maintain the grinding device to ensure longevity and accuracy in sample processing.

    • Replace any worn-out parts to maintain optimal performance.

Key Features:

  • Efficient Sample Processing: Enables fast and consistent grinding of biological materials.

  • Versatile: Suitable for a wide range of biological evidence types, including tissue, bone, and fluids.

  • Secure and Contamination-Free: Ensures that the processed material remains uncontaminated and ready for further analysis.

  • Ease of Use: Simple controls and adjustable settings for precise sample preparation.

Scope:
These devices are used in forensic labs, medical research, environmental testing, and any field where biological evidence requires processing for DNA extraction or other forms of analysis.

Safe Blood Collection & Transport Protocols

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Safe and efficient blood sample collection and transportation are critical for accurate medical and forensic analysis. Proper techniques ensure sample integrity, prevent contamination, and maintain the sample’s viability during transit.

Standard Methods for Blood Collection:

  1. Preparation: Ensure all necessary equipment is sterile, including collection tubes, lancets, gloves, and labels. Confirm the patient’s identity before collection to avoid mix-ups.

  2. Collection:

    • Clean the collection site with an alcohol swab to disinfect it.

    • Use sterile lancets or needles to draw blood from the vein or finger.

    • Fill the collection tube according to the required volume. Use tubes with preservatives or anticoagulants as necessary.

  3. Sealing and Labeling: After collection, securely seal the tube and label it with the patient’s information, date, time, and any other relevant identifiers to maintain accurate records.

Transportation Procedures:

  1. Preservation: If the sample requires refrigeration, store it in a cool environment immediately after collection to maintain stability. For non-refrigerated samples, ensure they are kept at room temperature, as instructed.

  2. Leak-Proof Containers: Place the sealed blood sample in a secure, leak-proof container to avoid contamination and prevent spills.

  3. Timely Transport: Transport the sample to the laboratory as soon as possible, preferably within the time frame required by the testing method (e.g., within 24 hours for most blood tests).

  4. Chain of Custody: Document the chain of custody to ensure traceability and prevent tampering during transport, especially for forensic samples.

Key Features:

  • Sterile Collection: Ensures no contamination of the blood sample during collection.

  • Secure Packaging: Leak-proof containers and secure seals ensure safe transport.

  • Temperature Control: Proper storage methods preserve sample integrity.

  • Accurate Documentation: Labeling and chain-of-custody protocols guarantee traceability.

Scope:
These methods are applied in medical diagnostics, forensic investigations, and legal settings, ensuring the accuracy and reliability of blood sample analysis.

Forensic Blood Kits: Setup & Operation

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Forensic field blood collection kits are essential tools used by law enforcement and forensic experts to collect blood samples from crime scenes or accident sites. These kits are designed to ensure that biological evidence is collected, preserved, and transported securely for subsequent analysis in forensic labs.

Configuration of the Kit:

  1. Blood Collection Tubes: Sterile tubes designed for safe and efficient blood collection. These are often pre-treated with anticoagulants to preserve the sample.

  2. Lancets or Needles: Sterile, single-use lancets or needles to draw blood from the subject.

  3. Swabs and Pads: Alcohol swabs for cleaning the collection site and gauze for stopping bleeding post-sample collection.

  4. Sealable Bags and Labels: Used for secure storage and transport of samples, ensuring proper documentation and chain of custody.

  5. Transport Containers: Insulated, leak-proof containers to protect the sample during transport.

Operational Procedures:

  1. Preparation: Inspect the kit to ensure all items are sterile and intact. Wear protective gloves and ensure proper documentation is available for labeling.

  2. Collection: Clean the area to be sampled with an alcohol swab. Use a lancet to collect the blood, and immediately place the blood in the designated collection tube.

  3. Sealing and Labeling: After collecting the blood, seal the tube and label it with all required information, including the date, time, and case details.

  4. Storage: Store the sample in a cool, dry place if immediate transport is not possible, following the kit’s temperature guidelines.

  5. Transport: Transport the sample to the laboratory using the provided secure, leak-proof container, ensuring proper chain-of-custody procedures are followed.

Key Features:

  • Compact and Portable: Designed for use in the field, easy to carry and deploy at crime scenes or remote locations.

  • Sterile and Safe: Ensures clean collection to prevent contamination.

  • Secure Sample Handling: Includes everything needed for proper labeling, sealing, and transport of the collected sample.

Scope:
These kits are used in forensic science, law enforcement, accident investigation, and emergency response, providing reliable sample collection in field settings.

Field Guide: Alcohol & Drug Blood Test Kits

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Alcohol and drug test blood sample collection kits are critical tools for rapid on-site testing in the field. These kits are specifically designed for the collection, preservation, and transport of blood samples to detect alcohol and drug levels, ensuring timely and accurate testing. Proper usage and handling are essential for maintaining the integrity of the samples.

Instructions for Use:

  1. Preparation: Ensure the collection kit is complete and sterile. Check that the kit contains all necessary components: blood collection tubes, lancets, alcohol pads, and labeling materials.

  2. Personal Protection: Wear gloves and other protective gear to avoid contamination and ensure safety during blood collection.

  3. Sample Collection:

    • Clean the collection site with an alcohol pad to disinfect the area.

    • Use the lancet to prick the individual’s finger or another designated area.

    • Collect the blood sample by gently filling the provided blood collection tube. Avoid overfilling or underfilling to ensure proper test results.

  4. Sealing and Labeling: Immediately seal the sample in the provided container or tube and label it with relevant information, such as the subject’s name, date, and time of collection.

  5. Storage: Store the collected blood sample in a cool, dry place if immediate transport is not possible. Follow any specific temperature guidelines provided in the kit instructions.

  6. Transport to Lab: Safely transport the sealed and labeled sample to the testing laboratory as soon as possible. Ensure the chain of custody is documented to avoid mishandling or contamination.

Key Features:

  • Field Ready: Compact and portable, designed for use in emergency, roadside, or remote settings.

  • Sterile Components: Ensures clean, contamination-free sample collection for reliable test results.

  • Clear Instructions: Simple, step-by-step process that ensures accurate sample handling and minimal error.

  • Secure Transport: Includes sealed containers for safe and proper transportation of blood samples to laboratories.

Scope:
These kits are commonly used by law enforcement, emergency medical personnel, and field professionals for alcohol and drug testing in roadside or remote locations, providing a reliable means of testing under various conditions.