How to use the Bilang Photochemical Reaction InstrumentThe method of using the Bilant Photochemical Reaction Instrument was as follows:
1. Preparing:
- After connecting the power supply, the eight-position reactor (or magnetic stirring device) was placed into the main machine box, and the magneton was placed into the Quartz reaction tube (or reaction vessel).
- Check whether the mercury lamp (Xenon lamp), reactor, and cooling water circulation device are connected properly. After pressing the water tank for 5 seconds, select the circulation and cooling mode.
2. Connection in the reaction chamber:
- According to the instructions, connect the eight-position reactor (or magnetic stirring device) in the reaction dark box to the power interface of the lamp.
3. Controller operation:
- He adjusted the power knob on the controller to the maximum.
- He turned on the fan switch on the controller and the reactor switch in turn. The fan worked to discharge the air from the reaction chamber.
4. Operation of the reactor:
- Turn on the power switch on the eight-position reactor (or magnetic stirring device) and adjust the stirring speed as needed.
5. Lighting and power adjustment:
- Turn on the lights. The light source power adjustment of the biochemical reactor is located in the center of the controller. The light source power can be adjusted according to the needs.
6. Time setting:
- Use the microchip timer on the top right corner of the controller of the biochemical reactor to set the working time as needed.
Note:
- Regardless of whether a mercury lamp or a xenon-type lamp was used for experiments, the lamp source must be placed in a Quartz Cold Trap. The temperature limit sensor must be placed in the Quartz Cold Trap, and only 1/3 of it should be exposed. If it exceeded 50 degrees, the power would be cut off.
- It is recommended to turn off the lights and let the supporting low-temperature cooling circulation device continue to run for 30 minutes before stopping the operation to avoid damage to the instrument due to excessive temperature.
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Reflection on the water surfaceHere are some tips for taking pictures of reflections on water:
** 1. Basic Shooting Preparing **
1. ** Choose a suitable water surface **
- The calm water surface was more conducive to reflective shooting. If you want a clear reflection photo, you should choose a lake, stream, etc. with a gentle flow of water. It is difficult to shoot a static reflection effect on a large flowing water surface (such as a rapid current), but you can use a long exposure to make the water appear silky, or use a high-speed shutter to shoot the static moment of the water movement. If you can't extend the shutter time during the day, you can use an external ND filter to reduce the exposure and extend the shutter time.
- For small puddles, such as small puddles after rain, it could also be used to shoot reflections. However, the puddles in the city may be muddy due to the stirring of cars and pedestrians, affecting the reflection effect. It was best to wait until the water surface was completely still and there was no debris to shoot.
2. ** Decide the shooting timing **
- In terms of weather, when there was no wind, the surface of the water was calm and reflective. At different times of the day, the surface of outdoor lakes and pools in the early morning or midnight was usually the quietest. There was less wind, which was suitable for shooting.
- In terms of lighting, the best time to shoot was when the scene was in front or side light. This could illuminate the details of the scene above the water level, and increase the chance of beautiful reflections (reflections) when it was calm. When backlighting, the effect was like shooting stars. Generally, the light effect was more obvious at sunrise and sunset.
** 2. Shooting Techniques **
1. ** In terms of composition **
- Usually, the composition was symmetrical and centered. The reflection and the main body were placed in the middle of the picture, making the reflection and the main body mirror symmetrical. You can also only shoot the reflection part as the main body of the picture (when the reflection effect is interesting or the medium is special), but you have to keep the basic form of the reflective medium.
- Try to create new compositions, such as rotating the photo 180 degrees or flipping the canvas vertically so that the reflection is at the top of the picture, or rotating the photo 90 degrees to create a unique visual experience.
2. ** Focus and depth of field **
- When taking a selfie with the front of the water, if the aperture was opened wide, the depth of field would be very shallow, and the reflection would easily be out of focus. You could reduce the aperture and then manually focus to ensure that the clear range was in focus.
3. ** Setting of parameters **
- When shooting the starlight effect, a small aperture was the key. The aperture value was set above F8. The smaller the aperture, the more obvious the starlight was. It was generally better at backlighting, sunset, and sunrise. However, it was easy to glare when taking photos. It needed to be blocked with a hood or other obstructions.
- If the light waves were used as a foil, he could also use a large aperture to make it look like a bokeh. When shooting reflective reflections, you can also use a tripod to match the lowest camera's USB with a small aperture (such as F8 - F11) and a long exposure to make the reflections more exciting, brighter, and the things in the reflections clearer. However, you have to adjust the parameters flexibly according to the light, environment, and subject.
- When shooting, you can use aperture priority mode, manually select a smaller aperture value (such as f/11, f/16, or even f/18), and manually lower the exposure compensation as needed to suppress other parts of the picture and highlight the reflection of the water surface.
4. ** Special Effects and Originality **
- At night, when the wet reflective water surface was not calm, the reflection of the light would fluctuate, and the unique abstract picture could be shot using the off-focus effect.
- If you wanted to shoot a character's "Lightness Skill Floating on Water" effect, you could first shoot a video of the character's side walk and the lake scenery. After the video was imported, you could do a series of post-processing, such as cutting the character video into a picture-in-picture, smart image matching, copying, adjusting the opaqueness, rotating, mirror, and other operations. You could also add water splash material.
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The Dutch donated their ancestral relics to ShanghaiThere was a Dutchman named Ni Hanke. His banker grandfather had started collecting China porcelain in the late 1920s, and his father had joined the collection. After Ni Hanke inherited the family collection, he continued to expand his collection through auctions. He was influenced by his family background and was full of love for traditional China culture and art. In 2008,2018, and 2019, Ni Hanke donated more than 150 pieces of China porcelain, bronze, and tooth carvings to the Shanghai Museum in three times. The period spanned nearly 3,000 years from the Shang Dynasty to the Ming and Qing Dynasties. These donations enriched the collection of the Shanghai Museum and filled the gaps in the corresponding categories. They had artistic, historical, and academic research value. For example, in July 2008, he donated 97 pieces of porcelain from his family's collection for generations. The Shanghai Museum also held an exhibition based on his donation. He also won the "Shanghai City Magnolia Memorial Award" and the "Shanghai City Magnolia Honor Award".
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