A gel imaging apparatus

Abstract

The utility model relates to a kind of gel imaging equipment, including organism, light box and camera component, the organism is equipped with containing cavity;The light box is located in the containing cavity, for exciting gel to appear fluorescence;The camera component is located in the upside of the light box, and including camera, optical filter and drive assembly, the lens of the camera corresponds with the light box, the optical filter is located in one side of the lens, the optical filter has the first state of shielding the lens, and the second state of revealing the lens, the drive assembly is used to drive the optical filter activity.The optical filter is moved to the first state when observing nucleic acid gel sample, pass through optical filter and filter ultraviolet light, improve imaging effect, when observing protein glue sample, it is moved to the second state, avoid the optical filter shielding the lens, resolution is high, and color development effect is good.According to different types of sample, the optical filter is switched between the first state and the second state, improve imaging effect.

Description

Technical Field

[0001] This utility model relates to the field of gel imaging technology, and specifically to a gel imaging device. Background Technology

[0002] Gel imaging systems are used for imaging and analysis of DNA / RNA / protein gels using various staining methods (such as EB, Coomassie Brilliant Blue, silver staining, and SYBR Green) and non-chemiluminescent methods such as microplates and petri dishes. It is a gel analysis system that integrates observation, imaging, and analysis of gels. It can be applied to routine bioengineering research such as molecular weight calculation, density scanning, density quantification, and PCR quantification.

[0003] The core principle of gel imaging systems is based on the fluorescence excitation of a sample under illumination. When light from the source shines on the sample, the complexes within it undergo a fluorescence reaction, generating fluorescence signals. By imaging these fluorescence signals, image information of the biological sample can be obtained. Software analysis can then be used to obtain the sample's optical density information, thereby calculating the sample's concentration or mass. Qualitative analysis relies on the differences in migration rates of the sample on electrophoresis gels or other carriers. By comparing the positions of the unknown sample and standards in the spectrum, the composition and properties of the unknown sample can be determined.

[0004] Existing gel imaging systems typically observe nucleic acid gels by excitation with ultraviolet light, and require filters at the lens to filter ultraviolet light to improve image quality; however, the image quality for protein gels is not ideal, with low resolution and color distortion. Utility Model Content

[0005] Based on the above description, this utility model provides a gel imaging device to solve the problem that existing gel imaging systems cannot simultaneously ensure the image quality of nucleic acid gels and protein gels.

[0006] The technical solution of this utility model to solve the above-mentioned technical problems is as follows:

[0007] A gel imaging device includes a body, a light box, and a camera assembly. The body has a receiving cavity. The light box is disposed within the receiving cavity and is used to excite the gel to fluoresce. The camera assembly is located above the light box and includes a camera, a filter, and a driving assembly. The lens of the camera corresponds to the light box. The filter is disposed on one side of the lens and has a first state of obscuring the lens and a second state of exposing the lens. The driving assembly is used to drive the filter to move.

[0008] Based on the above technical solution, the present invention can be further improved as follows:

[0009] Furthermore, the driving assembly includes a slide rail, a slider, and a driving component. The slide rail is connected to the body and located on one side of the lens axis. The slider is slidably connected to the slide rail and connected to the filter. The driving component drives the slider.

[0010] Furthermore, the driving component includes a lead screw, a nut, and a motor. The extension direction of the lead screw is the same as the extension direction of the slide rail. The nut is slidably engaged with the lead screw to form a lead screw and nut pair. The nut is connected to the filter. The motor is connected to the machine body and is used to drive the lead screw to rotate.

[0011] Furthermore, the filter and the driving component are respectively disposed on both sides of the slide rail in the thickness direction;

[0012] The slide rail is provided with a through groove extending in the vertical direction, and the through groove is provided to pass through the thickness direction of the slide rail;

[0013] The gel imaging device also includes a connector, which is inserted into the through groove, and the two ends of the connector are respectively connected to the filter and the nut.

[0014] Furthermore, the gel imaging device also includes a stop and a mating part, the stop being connected to the body and the mating part being connected to the filter so as to abut against the stop when the filter is in the first state.

[0015] Furthermore, the stop portion is provided with a stop groove.

[0016] Furthermore, the driving component is configured as a lifting motor.

[0017] Furthermore, the gel imaging device includes at least two LED white light lamps and at least two LED ultraviolet lamps. The two LED white light lamps are respectively disposed on the two cavity sidewalls of the receiving cavity along the length direction of the light box, and the two LED ultraviolet lamps are respectively disposed on the two cavity sidewalls of the receiving cavity along the length direction of the light box, and are located above the LED white light lamps.

[0018] Compared with the prior art, the technical solution of this application has the following beneficial technical effects:

[0019] The filter is movably mounted on one side of the lens, having a first state of blocking the lens and a second state of exposing the lens. When observing nucleic acid gel samples, a corresponding ultraviolet lamp is turned on to excite the nucleic acid gel sample to emit fluorescence. At this time, the filter moves to the first state, blocking the lens to filter ultraviolet light and improve the image quality captured by the camera. When observing protein gel samples, only a white light lamp needs to be turned on. At this time, the filter moves to the second state, exposing the lens, allowing the camera to directly capture images of the filter with high resolution and good color development. Thus, the filter can switch between the first and second states according to different types of samples, improving the imaging effect of the gel imaging device. Attached Figure Description

[0020] Figure 1 A schematic diagram of the structure of a gel imaging device provided in an embodiment of this utility model;

[0021] Figure 2 for Figure 1 A magnified view of point A in the local area;

[0022] Figure 3 This is a schematic diagram of the structure of the body and camera assembly in an embodiment of this utility model;

[0023] Figure 4 This is a schematic diagram of the camera component in an embodiment of the present invention;

[0024] Figure 5 for Figure 4 Another structural diagram from a different perspective;

[0025] Figure 6 for Figure 1 Another structural diagram from a different perspective;

[0026] Figure 7 This is a partial structural schematic diagram of a gel imaging device provided in an embodiment of the present invention;

[0027] Figure 8 This is a schematic diagram of the structure of a gel imaging device provided in another embodiment of the present invention.

[0028] The attached diagram lists the components represented by each number as follows:

[0029] 1. Body; 11. Housing; 111. Receiving cavity; 1111. Receiving groove; 12. Partition; 121. Through hole; 13. Flip door; 131. Groove; 132. Annular rubber strip; 14. Mounting cavity; 141. Heat dissipation hole; 142. Mounting window; 15. Sample tray; 16. Movable frame; 17. Guide rail; 18. Sliding rail; 19. Annular raised edge; 2. Light box; 3. Camera assembly; 31. Camera; 311. Lens; 32. Filter; 321. Connecting plate; 3211. Connecting hole; 32 2. Body; 33. Drive assembly; 331. Slide rail; 3311. Through groove; 332. Slider; 333. Drive component; 3331. Lead screw; 3332. Nut; 3333. Motor; 334. Connector; 34. Refractive structure; 341. Mating hole; 41. Stop part; 411. Stop groove; 42. Mating part; 51. LED white light; 52. LED ultraviolet light; 6. Fan; 71. Industrial computer; 72. Limit switch; 81. Bracket; 82. Camera protective cover; 9. Protective plate. Detailed Implementation

[0030] To facilitate understanding of this application, a more complete description will be provided below with reference to the accompanying drawings, which illustrate embodiments of the present application. However, the present application can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that the disclosure of this application will be thorough and complete.

[0031] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.

[0032] It is understood that spatial relation terms such as "below," "under," "below," "below," "above," "above," etc., can be used here to describe the relationship between one element or feature shown in the figure and other elements or features. It should be understood that, in addition to the orientation shown in the figure, spatial relation terms also include different orientations of the device in use and operation. For example, if the device in the figure is flipped, the element or feature described as "below" or "below" of the other element or feature will be oriented "above" the other element or feature. Therefore, the exemplary terms "below" and "below" can include both upper and lower orientations. Furthermore, the device may also include other orientations (e.g., rotated 90 degrees or other orientations), and the spatial descriptive terms used herein will be interpreted accordingly.

[0033] It should be noted that when one element is considered to be "connected" to another element, it can be directly connected to the other element or connected to the other element through an intermediary element. In the following embodiments, "connection" should be understood as "electrical connection," "communication connection," etc., if the connected circuits, modules, units, etc., have the transmission of electrical signals or data between them.

[0034] When used herein, the singular forms of “a,” “an,” and “the” may also include the plural forms unless the context clearly indicates otherwise. It should also be understood that the terms “comprising,” “including,” or “having,” etc., specify the presence of the stated feature, whole, step, operation, component, part, or combination thereof, but do not preclude the possibility of the presence or addition of one or more other features, wholes, steps, operations, components, parts, or combinations thereof.

[0035] Reference Figures 1 to 3 This utility model provides a gel imaging device, including a body 1, a light box 2, and a camera assembly 3. The body 1 has a receiving cavity 111. The light box 2 is disposed in the receiving cavity 111 and is used to excite the gel to produce fluorescence. The camera assembly 3 is located on the upper side of the light box 2 and includes a camera 31, a filter 32, and a driving assembly 33. The lens 311 of the camera 31 corresponds to the light box 2. The filter 32 is disposed on one side of the lens 311. The filter 32 has a first state of blocking the lens 311 and a second state of exposing the lens 311. The driving assembly 33 is used to drive the filter 32 to move.

[0036] In this embodiment, the filter 32 is movably mounted on one side of the lens 311, having a first state of blocking the lens 311 and a second state of exposing the lens 311. When observing nucleic acid gel samples, a corresponding ultraviolet lamp is turned on to excite the nucleic acid gel sample to emit fluorescence. At this time, the filter 32 moves to the first state, blocking the lens 311 to filter ultraviolet light and improve the image quality captured by the camera 31. When observing protein gel samples, only a white light lamp needs to be turned on. At this time, the filter 32 moves to the second state, exposing the lens 311, so that the camera 31 can directly capture images of the filter 32 with high resolution and good color development. Thus, the filter 32 can switch between the first and second states according to different types of samples, improving the imaging effect of the gel imaging device.

[0037] It should be noted that, in this embodiment, the filter 32 includes a connecting plate 321 and a body 322. The connecting plate 321 is provided with a connecting hole 3211 that is adapted to the lens 311. The body 322 is adapted to the connecting hole 3211 and is installed in the connecting hole 3211.

[0038] Specifically, refer to Figures 3 to 5 In this embodiment, the driving component 33 includes a slide rail 331, a slider 332, and a driving member 333. The slide rail 331 is connected to the body 1 and located on one side of the axial direction of the lens 311. The extending direction of the slide rail 331 intersects the axial direction of the lens 311. The slider 332 is slidably connected to the body 1 and connected to the filter 32, i.e., the connecting plate 321. The driving member 333 drives the slider 332 to slide on the slide rail 331, thereby moving it closer to or further away from the lens 311 to switch between a first state and a second state. Thus, the structure is simple and easy to configure.

[0039] More specifically, continue to refer to Figures 3 to 5 In this embodiment, the driving component 333 includes a lead screw 3331, a nut 3332, and a motor 3333. The extension direction of the lead screw 3331 is the same as the extension direction of the slide rail 331. The nut 3332 is slidably engaged with the lead screw 3331 to form a lead screw and nut pair, and the nut 3332 is connected to the filter 32. The motor 3333 is connected to the machine body 1 and is used to drive the lead screw 3331 to rotate. The rotation of the drive shaft of the motor 3333 drives the lead screw 3331 to rotate, causing the nut 3332 to slide along the extension direction of the lead screw 3331, thereby driving the filter 32 to move and switch between a first state and a second state. The slide rail 331 limits the travel of the filter 32 and also serves as a transition, reducing the load on the lead screw 3331 and the nut 3332. Furthermore, the cooperation between the lead screw 3331 and the nut 3332 makes the movement of the filter 32 more stable and allows for fine adjustment of the position of the filter 32, enabling precise alignment between the body 322 and the lens 311. This ensures stable drive and facilitates position adjustment.

[0040] In this embodiment, the filter 32 and the driving member 333 are respectively disposed on both sides of the slide rail 331 along its thickness direction; the slide rail 331 has a through groove 3311 extending vertically, the through groove 3311 being disposed through the thickness direction of the slide rail 331; the gel imaging device further includes a connector 334, the connector 334 being inserted into the through groove 3311, and both ends of the connector 334 being connected to the filter 32 and the nut 3332 respectively. This makes the connection between the driving member 333 and the slide rail 331 more compact, reducing space occupation.

[0041] In another embodiment, the drive element 333 is configured as a lifting motor, which is a linear motor; the drive element 333 may also be configured as a cylinder.

[0042] In this embodiment, refer to Figure 2 , Figure 4 and Figure 5 The gel imaging device further includes a stop part 41 and a mating part 42. The stop part 41 is connected to the body 1, and the mating part 42 is connected to the filter 32 so that it abuts against the stop part 41 when the filter 32 is in the first state. Thus, the stop part 41 restricts the movement of the filter 32, ensuring that the filter 32 can be accurately stopped in the first state, thereby improving the imaging effect.

[0043] Furthermore, in one embodiment, the stop portion 41 is provided as a stop block. When the filter 32 is moved to the first state, the stop block abuts against the mating portion 42. When the filter 32 is moved to the second state, the stop block and the mating portion 42 are spaced apart along the extending direction of the slide rail 331. Thus, the structure is simple, easy to manufacture, and low in cost.

[0044] Reference Figure 5 In this embodiment, the stop portion 41 is provided with a stop groove 411. When it is necessary to block the lens 311, the filter 32 moves toward the lens 311, and the mating portion 42 enters the stop groove 411 and abuts against the bottom wall of the stop groove 411. When it is necessary to expose the lens 311, the mating portion 42 moves out of the stop groove 411 and is positioned away from the stop groove 411. In this way, the limiting effect of the stop groove 411 is better, and it can accurately limit the position.

[0045] It should be noted that in this embodiment, the setting of the mating part 42 is not limited, as long as it is located within the stop groove 411 when the filter 32 is in the first state and is away from the stop groove 411 when the filter 32 is in the second state.

[0046] Reference Figure 1 and Figure 3 In this embodiment, the body 1 further includes a housing 11, a partition 12, and a hinged door 13. The partition 12 is disposed inside the housing 11, and an installation cavity 14 is formed between the upper side of the partition 12 and the housing 11. A receiving groove 1111 is formed between the lower side of the partition 12 and the body 1. The partition 12 is provided with a through hole 121 extending vertically. One side of the hinged door 13 is rotatably mounted to the housing 11, and the other side of the hinged door 13 can be fitted against the housing 11 to close the receiving groove 1111 or moved away from the housing 11 to open the receiving groove 1111. The camera assembly 3 is installed in the installation cavity 14, and the lens 311 corresponds to the through hole 121. The receiving cavity 111 includes the receiving groove 1111. This allows the flap door 13 to be opened to place a gel sample into the receiving slot 1111, and then the flap door 13 to close the receiving slot 1111, thus forming the receiving cavity 111, which is equivalent to a darkroom; the ultraviolet light emitted by the light box 2 shines on the gel sample, exciting the gel sample to emit fluorescence; the darkroom environment facilitates the camera 31 to capture clear image information of the gel sample.

[0047] Reference Figure 3 In this embodiment, the gel imaging device further includes a fan 6, which is disposed within the mounting cavity 14. The sidewall of the mounting cavity 14 is provided with a plurality of heat dissipation holes 141. The fan 6 is used to dissipate the heat generated by the camera 31 and motor 3333 components during operation within the mounting cavity 14.

[0048] In addition, refer to Figure 1 , Figure 2 and Figure 8 In this embodiment, the gel imaging device further includes an industrial control computer 71, a control circuit board, a power switch, a power socket, a network cable interface, and a USB external interface. The mounting cavity 14 has a mounting window 142, which faces the same direction as the opening of the receiving groove 1111. The industrial control computer 71 is mounted on the mounting window 142 for human-computer interaction and image acquisition. The control circuit board and the power switch are both located in the mounting cavity 14 and are electrically connected to the industrial control computer 71. The power socket, the network cable interface, and the camera protective cover 82 are all located on one side of the housing 11. The power socket is used for electrical connection to an external power source.

[0049] In one embodiment, the camera 31 is disposed on the upper cavity wall of the mounting cavity 14, and the lens 311 faces downward. (See reference...) Figures 1 to 3In this embodiment, the camera 31 is located on one side of the body 1, and the imaging assembly 3 further includes a refractive structure 34, which is used to guide the light from the through hole 121 into the lens 311. This expands the imaging field of view and is compact in size, saving space.

[0050] It should be noted that the refractive structure 34 can be configured as a periscope structure or an inclined plane mirror.

[0051] Furthermore, refer to Figure 1 , Figure 4 and Figure 6 In this embodiment, the gel imaging device further includes a bracket 81 and a camera protective cover 82. The refractive structure 34 is mounted on the partition 12, the bracket 81 is connected to the refractive structure 34, and the camera 31 is mounted on the bracket 81. To mount the camera 31 on the bracket 81, the housing 11 has a mounting through hole on the side of the camera 31 facing away from the lens 311, allowing the camera 31 to pass through the mounting through hole and be placed on the bracket 81, thus completing the mounting of the camera 31. The camera protective cover 82 is used to seal the mounting through hole, preventing dust in the air from entering the mounting cavity 14 and contaminating the lens 311, thus affecting the imaging effect. The drive component 333 and the slide rail 331 are both connected to the bracket 81 and are both located on one radial side of the lens 311. Furthermore, the extension direction of the slide rail 331 and the lead screw 3331 is the same as the radial direction of the lens 311.

[0052] In this embodiment, the slide rail 331 and the driving member 333 are both located on the upper side connected to the bracket 81. The refractive structure 34 is configured as a periscope structure and has a mating hole 341 for the filter 32 to pass through. The driving member 333 drives the filter 32 to move up and down to block or expose the lens 311.

[0053] Referring to the figure, the gel imaging device further includes a magnetic component and a magnetic suction component. One of the magnetic component and the magnetic suction component is located on the other side of the flip door 13, and the other is located at the position where the housing 11 and the flip door 13 are attached. Thus, when the flip door 13 closes the receiving slot 1111, the magnetic component and the magnetic suction component attract each other, ensuring that the flip door 13 is tightly closed.

[0054] In this embodiment, the magnetic component is a magnetic steel ball, which is located on the other side of the flip door 13. The housing 11 is made of a magnetic material, so that the flip door 13 can fit tightly against the housing 11.

[0055] Reference Figure 3 , Figure 7 and Figure 8 In this embodiment, the gel imaging device further includes a limit switch 71, which is located at the opening of the receiving groove 1111. When the flip door 13 is closed, the flip door 13 is in contact with the limit switch 71; when the flip door 13 is open, the flip door 13 moves away from the limit switch 71, thereby enabling the limit switch 71 to detect whether the flip door 13 is open during the imaging experiment, ensuring the accuracy of the experimental results.

[0056] In addition, refer to Figure 1 , Figure 3 and Figure 7 In this embodiment, the lens 311 is configured as a zoom lens. The gel imaging device also includes at least two LED white light lamps 51 and at least two LED ultraviolet lamps 52. The two LED white light lamps 51 are respectively installed on two opposite sidewalls of the receiving tank 1111, and the two LED ultraviolet lamps 52 are respectively installed on two opposite sidewalls of the receiving tank 1111, located above the LED white light lamps 51. The two LED white light lamps 51 are used for illumination and observation of protein gel samples. The two LED ultraviolet lamps 52 are used for observation of nucleic acid gel samples. When it is necessary to observe the gel sample, the flip door 13 is opened first, then the two LED white light lamps 51 are turned on for illumination, and then the gel sample is placed on the sample tray. If the observed substance is protein gel, turn on the light source inside the light box 2, and keep the two LED white lights 51 on and the two LED ultraviolet lights 52 off; if the observed substance is LED ultraviolet light 52, turn on the corresponding LED ultraviolet light 52 or the light source of the light box 2, and turn off the two LED white lights 51.

[0057] It should be noted that, in this embodiment, the wavelength of the ultraviolet light emitted by the light box 2 is 310nm, the wavelength of one of the LED ultraviolet lamps 52 is 254nm, and the wavelength of the other LED ultraviolet lamp 52 is 365nm.

[0058] Reference Figure 3 ,and Figure 8 In this embodiment, the gel imaging device further includes a movable frame 16, which is movably connected to the housing 11 along the depth direction of the receiving groove 1111, and is used to place the light box 2. The gel imaging device also includes a protective plate 9, the lower side of which is rotatably connected to the side of the movable frame 16 near the flip door 13, so that the upper side of the protective plate 9 can be flipped up and down. This allows the movable frame 16 to be pulled out from the receiving groove 1111 for easy gel cutting; and the protective plate 9 is raised to protect the eyes from ultraviolet light damage during gel cutting.

[0059] It should be noted that, referring to Figure 3 and Figure 7 In this embodiment, each of the two opposite sidewalls of the receiving groove 1111 is provided with a guide rail 17. The two guide rails 17 are arranged opposite each other and extend along the depth direction of the receiving groove 1111. Two sliding rails 18 are provided on each side of the movable frame 16, and the two sliding rails 18 are slidably connected to the two guide rails 17 respectively. To increase the travel of the movable frame 16, four sliding rails 18 are provided; each guide rail 17 and its corresponding two sliding rails 18 are slidably connected in sequence.

[0060] Reference Figure 1 and Figure 6 In this embodiment, the housing 11 includes an annular protrusion 19, which surrounds the opening of the receiving groove 1111. The flip door 13 has a groove 131 corresponding to the annular protrusion 19, and annular adhesive strips 132 are attached to the two opposite sidewalls of the groove 131. When the flip door 13 is closed, the annular protrusion 19 enters the groove 131, and the two opposite sides of the annular protrusion 19 are respectively attached to the two annular adhesive strips 132. This achieves a good light-blocking effect and improves the imaging effect.

[0061] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A gel imaging device, characterized in that, include: The body (1) is provided with a receiving cavity (111); A light box (2), disposed within the receiving cavity (111), is used to excite the gel to fluoresce; and, The camera assembly (3) is located on the upper side of the light box (2) and includes a camera (31), a filter (32) and a driving assembly (33). The lens (311) of the camera (31) corresponds to the light box (2). The filter (32) is disposed on one side of the lens (311). The filter (32) has a first state of blocking the lens (311) and a second state of exposing the lens (311). The driving assembly (33) is used to drive the filter (32) to move.

2. The gel imaging device according to claim 1, characterized in that, The drive assembly (33) includes a slide rail (331), a slider (332), and a drive member (333). The slide rail (333) is connected to the body (1) and is located on one side of the axial direction of the lens (311). The slider (332) is slidably connected to the slide rail (331) and is connected to the filter (32). The drive member (333) drives the slider.

3. The gel imaging device according to claim 2, characterized in that, The driving component (333) includes a lead screw (3331), a nut (3332), and a motor (3333). The extension direction of the lead screw (3331) is the same as the extension direction of the slide rail (331). The nut (3332) is slidably engaged with the lead screw (3331) to form a lead screw and nut pair. The nut (3332) is connected to the filter (32). The motor (3333) is connected to the machine body (1) and is used to drive the lead screw (3331) to rotate.

4. The gel imaging device according to claim 3, characterized in that, The filter (32) and the driving member (333) are respectively disposed on both sides of the slide rail (331) in the thickness direction; The slide rail (331) is provided with a through groove (3311) extending in the vertical direction, and the through groove (3311) is provided through the thickness direction of the slide rail (331). The drive assembly (33) further includes a connector (334), which passes through the through groove (3311) and has its two ends connected to the filter (32) and the nut (3332), respectively.

5. The gel imaging device according to claim 1, characterized in that, The gel imaging device further includes a stop (41) and a mating part (42). The stop (41) is connected to the body (1), and the mating part (42) is connected to the filter (32) so as to abut against the stop (41) when the filter (32) is in the first state.

6. The gel imaging device according to claim 5, characterized in that, The stop part (41) is provided with a stop groove (411).

7. The gel imaging device according to claim 2, characterized in that, The driving component is a lifting motor.

8. The gel imaging device according to claim 1, characterized in that, The gel imaging device includes at least two LED white light lamps (51) and at least two LED ultraviolet lamps (52). The two LED white light lamps (51) are respectively disposed on two opposite cavity sidewalls of the receiving cavity (111), and the two LED ultraviolet lamps (52) are respectively disposed on two opposite cavity sidewalls of the receiving cavity (111) and located above the LED white light lamps (51).

Images