Microbial Streaker Device With Segmented Contact Surfaces
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Solution Overview
Problem
Current methods for isolating single microbial colonies are tedious, costly, and prone to errors, especially when dealing with large numbers of samples, as they require repetitive manual streaking and are not efficiently adaptable for automated systems, which can lead to inadequate dilution and colony separation.
Innovation Solution
A streaker device with a row of spaced apart contact surfaces, supported by a common flexible member, designed to minimize surface contact and accommodate variations in solid media, allowing for efficient single-pass streaking and automated operation, featuring flexible elongate members that can be angled and curved to prevent breaching and ensure adequate sample distribution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of moving object
If a wide head surface is used for streaking, then the contact area with the solid medium is increased, but the device cannot accommodate surface variations and may breach the medium surface
Solution Approach 1:
The head is divided into multiple discrete contact surfaces (first, second, third contact surfaces) arranged in a row, each capable of independently contacting the solid medium. This segmentation allows the contact surfaces to adapt to surface variations while maintaining adequate contact area for effective streaking.
Solution Approach 2:
The contact surfaces are arranged to allow dynamic adaptation to the solid medium surface during the streaking operation. The spaced-apart configuration enables each contact surface to independently conform to surface variations, providing both adequate contact area and adaptability.
2Ease of operation
If manual streaking methods are used, then flexibility in handling samples is maintained, but productivity is low and errors increase with repetitive tasks
Solution Approach 1:
The streaking device is designed with a universal configuration that can handle different sample types and streaking patterns. The row of spaced-apart contact surfaces can accommodate various inoculum deposition methods while maintaining operational flexibility, enabling both manual and automated operation for high-volume processing.
Solution Approach 2:
The device configuration allows for automated operation where the streaking process can be performed without continuous manual intervention. The spaced contact surfaces automatically distribute the inoculum across multiple bands during a single pass, eliminating the need for repetitive manual streaking operations.
3Manufacturing precision
If traditional loop streaking is used, then adequate dilution is achieved through multiple streaks, but the process is time-consuming and requires skilled operators
Solution Approach 1:
The head incorporates multiple spaced-apart contact surfaces that create multiple streak bands simultaneously in a single pass. This segmentation of the streaking function achieves adequate dilution and colony isolation accuracy without requiring multiple sequential streaking operations, significantly reducing the time required.
Solution Approach 2:
Multiple streaking functions are merged into a single operational pass. The row of contact surfaces performs what would traditionally require multiple separate streaking actions, combining dilution, distribution, and isolation functions into one efficient operation that maintains precision while reducing time and skill requirements.
4Productivity
If automated streaking systems are implemented, then productivity increases, but adaptability to different plate surfaces and sample types decreases
Solution Approach 1:
The automated streaking device uses multiple discrete, spaced-apart contact surfaces that can independently adapt to variations in plate surfaces and media types. This segmented configuration maintains high-volume processing capability while providing the flexibility to accommodate different sample types and media conditions through automatic adjustment of the contact pattern.
Data Source
AI summary
A streaker device for streaking a microbial inoculum for single colonies on the surface of a solid growth medium. The streaking device has a row of spaced apart contact surfaces for contact with the surface of the solid growth medium. The spaced apart contact surfaces are resiliently flexibly supported by a common support member so as to accommodate variations in depth of growth medium. The spaced apart contact surfaces may be provided on lowermost part of axially curved portions of plastics straps, that are angled backwardly. It is found that formation of a single band can give separation into single colonies. Also provided is an automatic streaking apparatus.