The present disclosure provides a diffusive gradients in thin films (DGT) probe test device for a sediment core in a lake, including: a sampling tube, where, a settlement limit device is disposed on an outer wall of the sampling tube and a DGT probe and a multi-parameter water-quality detection electrode are installed within the sampling tube; a movable mudguard device comprising a connecting rod and a mudguard, where, the connecting rod rotates around a rotating shaft to drive the mudguard to move from a position where an opening at the lower end of the sampling tube is sealed to a side of the sampling tube; a position-limit mechanism removably installed outside the sampling tube; a hammering device located above the sampling tube and fixedly connected to the sampling tube; and a floating ball located above the hammering device and connected to the hammering device via a first pull rope.

A method utilizing cold welding to prepare grain boundaries having different included angles includes using a device including a support member. Two bent members are arranged opposite to each other in the support member. One ends of the two bent members are both fixedly connected to the support member, one end, away from the support member, of any bent member is fixedly connected to a first sample, one end, away from the support member, of the other bent member is fixedly connected to a second sample, and the first sample and the second sample are arranged corresponding to each other. The bent member includes a first metal sheet and a second metal sheet having different thermal expansion coefficients. An angle between the first sample and the second sample during butt welding can be controlled by changing an included angle of a bimetallic sheet.

An active/resilient grinding media inside a tube containing a sample is oscillated rapidly by a homogenizer so that the active media is driven in a first direction until it impacts a first end of the tube, which causes it to deform and store an energy charge as it decelerates and stops, and it then accelerates rapidly in the second opposite direction under the discharging force of the stored energy toward the opposite second end of the tube. This cycle of the active media decelerating/charging and then discharging/accelerating is repeated throughout the entire oscillatory processing of the sample. The result is much higher velocities of the active media and therefore much greater impact forces when the sample and active media collide, producing increased efficiency in disruption and size-reduction of the sample particles.

The present disclosure provides a sample rotation system and method. The sample rotation system includes a rotation device, and the rotation device includes: a first carrier connected to a sample; a drive portion connected to the first carrier, wherein the drive portion is configured to drive the first carrier to rotate; and the first carrier drives the sample to rotate from an initial position to a target position; an acquisition device, configured to acquire a rotation state of the sample; and a control unit, electrically connected to the drive portion, and configured to control operation of the drive portion.

In a method and device for assessing the quality of a processing operation, a workpiece with specific processing parameters is processed along a processing trajectory. The (X), wherein the processing result is measured by at least one sensor and at least one sensor signal is recorded and at least one quality parameter is determined based on at least one sensor signal and the at least one quality parameter is compared with quality parameter threshold values to assess the quality of the processing result. During the assessment of the processing operation quality, changes made to the processing parameters from target values during the processing are automatically taken into consideration, in that, instead of the quality parameter threshold values, quality parameter threshold values adapted to the changes in the processing parameters are determined, and the at least one quality parameter for assessing the quality of the processing result is compared with the adapted quality parameter threshold values.

Systems, apparatuses, and methods enable rapid, repeatable, and accurate dissection of arthropods. Arthropod dissection apparatuses includes a shear dissection mechanism having a primary shear body and a secondary shear body. The primary shear body includes at least an inlet channel, a first outlet channel, and a second outlet channel formed therein. The secondary shear body is disposed in an aperture of the primary shear body and has a dissection chamber formed therein. The secondary shear body is movable between a first position and a second position relative to the primary shear body, which causes a shearing action at a shearing interface between the secondary shear body and the primary shear body.

Methods of introducing a small molecule into a crystal of a macromolecule, of obtaining a microcrystal having a macromolecule and a small molecule from a crystal of the macromolecule, of determining a structural model for a complex having a macromolecule and a small molecule, of identifying a small molecule that complexes with a macromolecule, and of screening a library of small molecules for their binding to a macromolecule are disclosed.

An arrayer for constructing a tissue array includes a recipient block holder having an upper face, a void for accommodating a tissue recipient block, and a guide plate configured to engage with the upper surface of the recipient block holder. The guide plate includes an array of through openings aligned with the void of the recipient blocking holder. The recipient block holder and the guide plate are configured to be secured to each other through securing elements. A kit including the arrayer, and punch pens for creating holes in the recipient block and for transferring tissue to the recipient block holder, is also provided. Methods of using the arrayer and the kit are also provided.

A specimen machining device includes an illumination system that illuminates a specimen; a camera that photographs the specimen; and a processing unit that controls the illumination system and the camera, and acquires a machining control image which is used for controlling an ion source and a display image which is displayed on a display unit. The processing unit controls the illumination system to illuminate the specimen under a machining illumination condition; acquires the machining control image by controlling the camera to photograph the specimen illuminated under the machining control illumination condition; controls the ion source based on the machining control image; controls the illumination system to illuminate the specimen under a display illumination condition which is different from the machining control illumination condition; acquires the display image by controlling the camera to photograph the specimen illuminated under the display illumination condition; and displays the display image on the display unit.

A toilet is disclosed. The toilet has a bowl adapted to receive excreta, a shelf for receiving feces in the bowl, and one or more sensor for detecting a property of the feces. The property may be related to a user's heath and wellness and may be presented to a person for their review and assessment.