Cookies are used on our website. Some of them are mandatory, while others allow us to improve your user experience on our website.
Essential cookies are required for basic website functions. This ensures that the website functions properly.
Name | fe_typo_user |
---|---|
Provider | TYPO3 |
Purpose | This cookie is a standard session cookie of TYPO3. It saves the entered access data for a closed area when a user logs in. |
Cookie life cycle | End of session |
Name | be_typo_user |
---|---|
Provider | TYPO3 |
Purpose | This cookie tells the website whether a visitor is logged into the Typo3 backend and has the rights to manage them. |
Cookie life cycle | End of session |
Name | PHPSESSID |
---|---|
Provider | php |
Purpose | PHP data identifier, set when the PHP session() method is used. |
Cookie life cycle | End of session |
Name | __utma |
---|---|
Provider | |
Purpose | In this cookie the main information is stored to track visitors. In this cookie, a unique visitor ID, the date and time of the first visit, the time at which the active visit is started and the number of all visitors that a unique visitor has made to the website is stored. |
Cookie life cycle | 2 years |
Name | __utmc |
---|---|
Provider | |
Purpose | This cookie belongs to the past and is no longer used by Google Analytics. For the backwards compatibility of pages that still use the urchin.js tracking code, this cookie is still written and expires when the browser is closed. However, this cookie does not need to be considered when debugging and using the new ga.js tracking code. |
Cookie life cycle | Session |
Name | __utmz |
---|---|
Provider | |
Purpose | This cookie is the visitor resource cookie. It contains all visitor resources information of the current visit, also information that was passed on via campaign tracking parameters. This cookie also stores whether the visitor source of the last visit was different from the current one. If no information about the visitor source can be determined, the cookie is not changed. In this way, Google Analytics can associate visitor information such as conversions and e-commerce transactions with a visitor source. The cookie does not contain historical information about past visitor sources. |
Cookie life cycle | 6 months |
Name | _ga |
---|---|
Provider | Google Tag Manager Google |
Purpose | Registers a unique ID that is used to generate statistical data on how the visitor uses the website. |
Cookie life cycle | 2 years |
Name | _gid |
---|---|
Provider | |
Purpose | Used by Google Analytics to limit the request rate. |
Cookie life cycle | 1 day |
Name | _ym_d |
---|---|
Provider | Yandex |
Purpose | Contains the date of the visitor's first visit to the website. |
Cookie life cycle | 1 year |
Name | _ym_isad |
---|---|
Provider | Yandex |
Purpose | Determines whether a user has ad blockers. |
Cookie life cycle | 2 days |
Name | _ym_uid |
---|---|
Provider | Yandex |
Purpose | Used to identify site users. |
Cookie life cycle | 1 year |
M130225 | |
Biology, Agriculture and forestry | |
ca 5 cm | |
5-6 mm | |
10-50 g | |
A comminution to the desired size of fraction is not possible. For moistened samples, only a Mortar Grinder or Planetary Mill might come into question. Only if drying will be allowed, sample can be used with a cutting mill. |
|
Mortar Grinder PULVERISETTE 2pestle downforce: 15 daN |
|
Equipment: |
mortar and pestle made of hard porcelain |
|
|
15 g | |
|
ca 5 cm | |
|
3 min | |
|
abortion | |
|
A comminution of the moistened sample is not possible. The sample uses to be too sticky and will stay attached to the pestle or will start to build up in front of the scraper.
Only when sample will be dried previously, or when additional water will be added, this sticky character of coarse particles will be removed.
Possibly a planetary mill might be capable to grind the moistened sample to a paste (see following report).
|
|
Planetary Mono Mill PULVERISETTE 6 classic linemain disk speed: 650 rpm (230 V current) |
|
Equipment: |
250 ml grinding bowl made of sintered corundum (Al2O3) + 15 x 20 mm Ø Al2O3 grinding balls |
|
|
26 g | |
|
ca 5 cm | |
|
abortion | |
|
Because of its moisture contend, the grass sample sticks together. The impact force of the used 20 mm Ø grinding balls does not seems to be big enough to comminute such balls of sample.
Without additional adding of water, this sample is not grindable with 20 mm grinding balls.
Even after 5 minutes of grinding, still intact sample can be found. Probably 30 mm Ø grinding balls will be more suitable for grinding (see result 3).
|
|
Pictures: | Opened grinding bowl after 5 minutes of grinding. |
![]() |
|
Planetary Mono Mill PULVERISETTE 6 classic linemain disk speed: 650 rpm (230 V current) |
|
Equipment: |
250 ml grinding bowl made of sintered corundum (Al2O3) + 6 x 30 mm Ø Al2O3 grinding balls |
|
|
45 g | |
|
ca 5 cm | |
|
5 min | |
|
mostly fine ground fibers | |
|
Comminution with 30 mm Ø grinding balls is possible. After 5 minutes of comminution at maximum speed, only a few fibers can be spotted with > 1 cm length. Most of ground particles already use to be < 3 mm (smaller as desired).
Because of its ruff surface, sintered corundum will have a rapid grinding success when organic, flexible particles should be ground. Because of its ruff surface, also more abrasion will be found after comminution compared to other ceramic grinding materials.
In most cases, a comminution with a planetary mill will deliver a wide spectrum of particles. To achieve a maximum output of particles in range of 5-6 mm, we recommend to dry the sample previously, a comminution with a cutting mill. With the sieve cassettes available in different sizes, output fineness can be steered somehow. Probably also a rotor speed mill might come into question as well when sample can be dried previously. |
|
Pictures: | Only with the used 30 mm grinding balls sample got mushed properly. |
![]() |