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Skin Care Ritual Purification Travel Size Set Content Re-move PH 30ml, Re-action PH 10ml, Re-charge PH 10ml, Re-fine 10ml, Re-vital PH 15ml + FREE: Stretch Lift Mask Feature Set Re-move PH The extremely light cleansing milk Re-move PH with antibacterial micronized silver and Seboclear® has a sebum-normalizing, mattifying and balancing effect. Panthenol additionally promotes healing and firms the skin combined with the contained Boswellia Serrata extract (frankincense), which has an additional protective and anti-inflammatory effect. Re-move PH is especially suitable for inflammatory, impure as well as sensitive, stressed skin. Apply 2-3 pumps in the morning and evening and remove thoroughly with water. To be able to intensify the effect, Re-move PH should remain on the skin a little longer! The product should not be washed off immediately, but should be applied like a mask for 5-10 minutes, so it can develop its full effect. Re-action PH 15% mandelic acid combined with 5% succinic acid make the AHA fruit acid peeling Re-action PH a must-have for very impure, oily skin. The natural antibiotic effect of mandelic acid effectively fights skin impurities and dissolves sebaceous deposits in the long term. The anti-inflammatory effect of succinic acid supports the skin renewal process. Apply 1-2 times a week, avoiding eyes and mucous membranes. Remove with water after 10-15 minutes. Re-charge PH Re-charge PH is formulated with large- and small-molecule hyaluronic acid and other NMF. The lightweight fluid provides essential epidermal hydration to the skin. As a product of the Pure Harmony series, the hyaluronic formula in Re-charge PH is complemented by Seboclear-MP™, which has a sebum-regulating effect. Re-charge PH is therefore the moisturizing serum for the more impure, oily skin. Apply 1-2 pumps in the morning and evening. Re-fine Re-fine is a corrective serum that has no equal. Formulated as an ultra-light fluid with a high-dose skincare formula, Re-fine provides an even complexion with refined pores and firm skin tone. Dermochlorella DP from green micro-algae is a true all-rounder! The complex increases the synthesis of collagen and targets the architecture of the dermal – epidermal junctions to strengthen the cohesion between these two important tissue layers, increasing skin tone and firmness. It also reduces microcirculation, which prevents vasodilatation of the capillaries responsible for redness. AquaPront® with barley extract provides an immediate and long-term effect in wrinkle reduction and is considered effective moisture binder. Epidermist 4.0 intensifies this and likewise contributes to a smoothing effect of the skin structure while helping to reduce pore size. Furthermore, it is able to regulate bacterial growth, reduce inflammation and thus improve cell renewal. It fights infections, has immunostimulant properties, accelerates skin regeneration and improves skin’s own protective mechanisms, making Re-fine a product CM-Glucan for very sensitive or stressed skin. Apply in the morning and evening. Re-vital PH Silky fluid with micronized silver is the ideal solution for extremely sensitive, irritated, blemished or inflamed skin. The complexion is regulated, the skin appears more even, pure and in balance. Seboclear® DB actively supports talc regulation, has an anti-inflammatory and antibacterial effect. As in Re-vital, Matrixyl™3000 was added here, which supports the skin’s own repair processes. DEFENSIL®-PLUS rebuilds the damaged skin barrier, dampens inflammatory processes and has a calming effect. Thanks to its anti-inflammatory and antimicrobial effect, hemp oil helps to combat pimples and blemishes, promotes regeneration and reduces redness and skin irritation. In addition, valuable vegetable oils such as grape seed oil and cupuacu butter provide the skin with essential unsaturated fatty acids, care intensively and skin-friendly. Apply generously in the morning and evening after serums. Re-vital PH has a light mattifying effect, is very well accepted by the skin, is quickly absorbed and does not leave a greasy residue. Stretch Lift Mask Intensively regenerating and moisturizing lifting mask for an immediately visible improvement of the facial contour through highly concentrated active ingredients such as hyaluron and calendula, embedded in a novel, wonderfully pleasant stretch material. The special shape of the mask supports the long-lasting lifting effect for radiantly fresh, youthful skin. Application: For best results, cleanse and dry your face. Carefully remove the mask from its packaging and place it on your face. Use your fingers to position as needed. Leave on for 10-15 minutes, feel free to leave on longer. The serum remaining on the face and in the packaging can then be massaged into the skin. © Jupiterimages/Wavebreak Media Bacteria are often multiplied in the laboratory for diagnostic or scientific purposes – this is called “bacterial culture”.

  • General
  • Bacterial growth


A bacterial culture requires, among other things, certain nutrients added to the culture media for its growth. The growth of the bacteria takes place in certain phases and at different rates depending on the type of bacteria. In order to live and multiply, bacteria require a suitable environment. In addition to nutrients, this environment must also contain salts, trace elements and other growth factors. Furthermore, optimal growth conditions require a certain oxygen and carbon dioxide content as well as a suitable pH value and the right temperature. While these conditions are more or less ideal in the natural environment of a bacterium, bacterial growth under laboratory conditions is only successful if the natural environmental conditions are simulated as well as possible. For bacterial culture, therefore, specially formulated nutrient media are used to meet the requirements of the respective bacterial species. Nutrient media. These can be in liquid form as “nutrient broth” or in semi-solid gel form (so-called nutrient agar). All the required nutrient media are added to these media. Gel-form culture mediaalso known as nutrient agar, contain the gelling agent Agar. Agar is obtained from algae, mostly red algae. Agar contains the polysaccharide agarose, which liquefies above 90 degrees Celsius and changes to a gel-like state below 45 degrees Celsius. Agar is transparent, colorless and tasteless. It cannot be broken down by bacteria. ” width=”770″ /> © Jupiterimages/iStockphoto Depending on the project, one uses different culture media for bacterial culture in the laboratory. Usually, culture media contain a one-percent agar solution and are heated and poured into shallow plastic or glass dishes with a lid (Petri dishes). The culture medium solidifies as it cools, forming a solid surface. Bacteria can grow on the surface of the nutrient plates. By appropriately varying the additives in a nutrient medium, it can be adapted to meet a wide variety of needs, depending on the type of bacteria and the objective of the study.

Defined nutrient media

Defined nutrient media contain only additives that are known in detail and precisely chemically defined. Defined nutrient media are tailored to the needs of specific bacterial species and can also be used for selection (culling) of a bacterial species.

Complex nutrient media

Complex culture media contain nutrients that are not precisely chemically defined, such as meat extracts, yeast extracts, and albumin. Complex media are very commonly used and allow the growth of almost all types of bacteria.

Selective nutrient media

The components of selective nutrient media are specially formulated to preferentially allow the growth of one type of bacteria and suppress the growth of another. They allow the growth of bacteria that possess certain characteristics to be able to multiply on the selective nutrient medium. For example, if the medium is enriched with a specific antibiotic, only bacteria that are resistant to that antibiotic can grow.

Indicator culture media

Some bacteria produce characteristic metabolites or consume a certain proportion of the nutrient medium. Changes in this range can be made visible by adding a specific dye (indicator) to the culture medium. In this way, indicator culture media can be used to typify bacteria.

Bacterial growth

Bacteria do not require sexual processes for their reproduction. They multiply mainly by simple division into two. In this way, a genetically identical clone of the bacterial cell is produced. The time required for a reproduction cycle (the so-called generation time) varies between 15 minutes and 24 hours. E. coli-bacteria, for example, only need about 20 minutes for a multiplication cycle, whereas tuberculosis bacteria need an average of 20 hours. The growth period or generation time depends not only on the bacterial species but also strongly on the environment in which it grows. If the bacterial growth of a culture is observed over time, a characteristic growth curve. This can be divided into four phases phases:

  1. Lag phase (latency phase): In the lag phase, the metabolism of the bacteria adapts to the conditions of the surrounding nutrient medium. Nutrients from the medium are absorbed and the enzymes required for processing are produced. No division of the cells occurs yet, only an increase in their volume.
  2. Log phase (logarithmic phase, exponential phase): The bacteria divide and the cell number increases exponentially or logarithmically. This means that steady, linear growth does not occur. Rather, the bacteria multiply very rapidly in a short period of time.
  3. Stationary phase: After a while, the nutrients in the medium are exhausted and toxic metabolites of the bacteria have accumulated in the culture medium. The bacteria stop their growth processes, cell divisions cease and the cell number does not increase further.
  4. Die-off phase: In the die-off phase, a lack of nutrients can no longer meet the energy requirements of the dormant, stationary bacteria. Toxic metabolic products in the nutrient medium hinder cell metabolism. Die-off processes begin and bacterial cells progressively perish.

Last update: 13.10.2020 Author*in Onmeda editorial team Dr. rer. nat. Geraldine Nagel (Medical Editor) Sources

Onmeda reading tips:

  • Bacteria


Online information from Pschyrembel: (as of 2012) Kayser, F. H. et al: Medical Microbiology. Thieme, Stuttgart 2010 Hahn, H. et al: Medical microbiology and infectiology. Springer Verlag, Heidelberg 2009

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Peel-off masks can rid the skin of blackheads and other skin impurities © Getty Images Peel-off masks can thoroughly cleanse the skin by pulling blackheads and dead skin flakes out of the skin. Well-known and popular are masks with activated charcoal. How best to use them and which DIY recipe is worth reading here. A clear complexion ensures well-being, after all, annoying pimples and blackheads only disturb. In terms of skin cleansing, there are numerous methods to help achieve a radiant and clear complexion. Peel-off masks are also one of them and are supposed to prevent blemished skin by regularly ridding the skin of excess sebum and dirt. Learn here how to properly use a peel-off mask and how to make your own DIY masks.

How does a peel-off mask work?

Peel-off masks have a gel-like consistency that slowly dries on the skin after being applied to the face. When the mask is peeled off, blackheads, loose skin flakes, dirt and sebum deposits are supposed to stick to it and be removed this way. By using it regularly, you can prevent skin blemishes such as pimples and blackheads. Peel-off masks are especially suitable for impure and combination skin. Often masks against blackheads with black activated charcoal are also known as black head masks. How to make your own mask with activated charcoal, read below.

Peel-off mask: this is how you apply it.

  • Clean face thoroughly: Before you can apply the mask, you should clean your face with a mild wash gel or cream. Then dry the face thoroughly again.
  • Apply peel-off mask: Before you apply the mask to your entire face, you can try it out on one area to make sure your skin tolerates it. After that, the peel-off mask can be used. Apply it as thinly as possible, because only then can it dry evenly. The easiest way to apply it is with your fingers, but there are also practical brushes for applying face masks, so that your hands stay clean. By the way, applying it thinly also makes it easier to remove later. Leave out the eye and mouth area, hairline and eyebrows so as not to irritate these finer skin areas. Be sure to let the peel-off mask dry completely, which can take up to 20 minutes.
  • Carefully peel off the mask: Start peeling off the mask from the sides of the face towards the nose. If any residue remains stuck to the skin, you can rinse it off with lukewarm water. If you want to have clear skin in the long term, repeat the application once or twice a week.
  • Tip for combination skin: You can leave out the parts of the face that would dry out too much from the peel-off mask and apply the mask specifically to impure areas. With combination skin, this is usually the so-called T-zone (forehead, nose, chin). You can apply a moisturizing cream to the dry cheeks and eye area instead.

DIY instructions for a peel-off mask.

Of course, you don’t necessarily have to buy cleansing peel-off masks, if you have time and desire, you can also use a DIY mask. You only need a few ingredients to make it:

  • 3 charcoal tablets
  • 1 tbsp. gelatin powder or vegetable agar agar
  • 2 tsp hot water

If you prefer to use a vegan mask, without animal gelatin, which contains bones, cartilage and connective tissue from cattle and pigs, you can use vegetable agar agar. It is carbohydrates found in the cell walls of blue and red algae. Thus, agar agar is obtained from sun-dried algae, then dried and processed into powder. Most drugstores, health food stores and health food stores carry the vegetable gelling agent. Crush the tablets with a mortar and boil water in parallel. Then mix the charcoal powder with the hot water and the gelatin, or the vegetable binder, until no more lumps are visible. For the optimal consistency of the mask, you can heat the mixture for about 30 seconds at 800 watts in the microwave until it thickens slightly. The exact duration depends on the individual power of your microwave. After heating, the paste must cool briefly, after which it can be applied.

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  • DIY
  • Mask
  • Blackheads
  • Dander

Our favorite homemade cleansers

Have you ever wondered how many harmful chemicals are in conventional cleaning products? There have been numerous reports about how bad they are for our health and the environment, so we set out to find some natural alternatives. Here are some of our favorites.

Soften in an instant – Gentle fabric softener.

Using mass-produced fabric softeners can cause nasty rashes and skin irritation on sensitive skin. This all-natural alternative is made with just three ingredients and is suitable even for those of us with sensitive skin. By adding your own essential oils, you can also choose the scents you like best.

  • Your favorite essential oils
  • First, mix some warm water and baking soda in a bowl – add half a cup of baking soda for every cup of water.
  • Once the baking soda and water are mixed, slowly add the vinegar and stir – half a cup of vinegar is needed for every cup of water.
  • Finally, add the selected essential oils (5 to 10 drops) and store in a reusable glass bottle.
  • Before each wash, add the desired amount to the fabric softener compartment.

Sparkling clean – Bathroom cleaner

Raise your hand if the bathroom is your favorite room to clean. No? Neither is ours. But we have a few tips and tricks to make it a little easier. Baking soda is a little cleaning miracle – not only is it chemical-free and removes stubborn stains and soap scum, but it can be used on bathroom surfaces without risking damage. Simply sprinkle a generous amount into the toilet bowl and let it soak in. After 30 minutes, spray a little vinegar around the toilet bowl and let it sit for another five minutes. Finally, scrub the toilet bowl and flush the toilet. The oils and fats in soaps, shampoos and creams often cause buildup in our bathrooms that is difficult to get rid of. To make your own chemical-free cleaner, simply mix Castile soap and baking soda 1:1 and add a few drops of your favorite essential oil. Add a few drops of water until the mixture resembles the consistency of a thick paste and apply with a sponge to the area to be cleaned. Leave on for a few minutes and then rinse off with water.

Fresh as a spring breeze – room freshener

There’s nothing better than walking into a room smelling like your favorite fresh scents. Instead of spending money unnecessarily on room fragrances, try making your own. With so many essential oils to choose from, there are endless possibilities!

  • 2 bags of vegetarian gelling agent or agar agar
  • Water (amount according to the gelling agent package)
  • Your favorite essential oils
  • Dried flowers/leaves (optional as decoration).

  • If you’re using decorations, add them to the jar first so you can then pour in the gelling mixture right away.
  • Heat the appropriate amount of water with a pinch of salt in a saucepan and wait for the salt to dissolve.
  • Add the gelling agent and prepare according to the instructions, stirring constantly. Once the mixture has melted, remove the pot from the heat and add the essential oils.
  • Stir the mixture well and pour into the jars. Let cool and close with an air-permeable lid to prevent the gelatin from drying out

Do you make your own cleaning products? We would love to know your recipes! Share them with us on our social media channels. Ingredients, production and uses || Other vegetable gelling and binding agents || How to use agar agar in cooking? || Buying and storing What is agar agar and how is it different from other gelling agents? Agar agar is a gelling agent used as an alternative to gelatin. Gelatin consists of animal proteins, mainly from the bones and cartilage of cattle and pigs. Since gelatin lacks the essential amino acid tryptophan, the “bone glue” is not a complete protein. Unlike gelatin, it provides valuable proteins and also contains no animal substances. Therefore, it is also ideally suited as a gelatin substitute for vegetarians and vegans. Smallest amounts are sufficient to create a solid dish – only half a teaspoon of the powder replaces 4 gelatine sheets.

Ingredients, production and uses of agar agar

The Japanese have been using it as an additive in various dishes and desserts since the 17th century. Thus, the gelling agent is often called “Japanese fish glue”, although the product has nothing to do with fish: Rather, the basis of the gelling agent is about 40 different varieties of red algae. Agar agar is dissolved from the cell walls of the algae with the help of hot water. It is then purified and dried. The finished product, a white to light brownish fine powder, consists of about 70% agarose, the actual substance responsible for gelling. The remaining 30% consists of agaropectin, a polysaccharide that has no gelling effect. In Europe, it is approved as a binder under the name E 406. Agar Agar is lactose-free and gluten-free and is therefore also suitable for many allergy sufferers. The gelling agent is also odorless and tasteless. In addition, no sugar is required when using this additive; agar agar only gels when it is brought to the boil together with the liquid. It is therefore equally suitable for sweet dishes as for savory and salty dishes. Furthermore, agar agar serves as a carrier for flavors. Agar agar is also sometimes used in the production of fruit wines: For example, a small amount of the additive removes the undesirable cloudiness from the beverage that cannot be eliminated by filtering alone. The gelling agent is not only used in cooking. In research, it is used to solidify culture media for microorganisms, for example bacteria or tiny algae and fungi. Here it has proven to be more stable than gelatin, which was used in the past, because unlike gelatin, even higher temperatures do not liquefy the mass as quickly.

Other vegetable gelling and binding agents

Other gelling agents of a vegetable nature include pectin, produced from sugar beets and the peels of citrus fruits and apples. Unlike agar agar, however, pectin cannot be boiled several times – so the ratio of liquid to powder must be right beforehand to produce the desired firmness. The strongly swelling psyllium husks also have a binding effect. In combination with coconut milk, this creates, for example, vegan mozzarella or a filling or icing for cakes. In addition – not only in the vegan kitchen – is Locust bean gum is known as a binding agent.. However, this vegetable additive is less suitable for gelling; the flour, obtained from the fruits of the currant tree, is used more as a gluten-free variant for thickening sauces and desserts. As an alternative, there is arrowroot flour, which is also gluten-free.

How do you use agar agar in cooking?

Agar agar is available in different qualities. While a few grams of some products are sufficient to bind a certain amount of liquid, a little more agar agar may be needed to prepare a solid dish from the same amount of liquid. In general, a lightly heaped teaspoon of agar agar is sufficient for about 750 ml of fruit pulp or liquid. To ensure the success of the food, a few things must be observed: First, the gelling agent must be completely dissolved. This is done by stirring occasionally but regularly until the liquid reaches boiling point. Excessive stirring, however, produces foam on the surface – which is likely to be undesirable in most cases. It is also useful to check the achieved firmness of the food before it has cooled down completely. To do this, it is sufficient to take a small amount of the boiled substance, about half a teaspoon: this amount is then placed on a plate and cooled to below 40 degrees. After a few minutes, the consistency should be determined. If it is still too liquid, the finished mass can be reduced slightly and then enriched with a newly prepared mixture containing slightly more agar agar. If the consistency of the sample is too solid, it helps to add a little liquid to the finished dish before it cools down and mix it well.

Recipes with Agar Agar

In principle, agar agar is a fully adequate substitute for gelatin. However, it is not suitable as a binder for sauces, as it only gels after cooling. However, agar agar can be used to conjure up many cold dishes – whether sweet or salty. Below are a few suggestions that can be adapted to suit personal tastes: If you love jam, but rather in a less sweet form, you have found the right gelling agent in agar agar. First, the fruits are brought to the boil together with liquid. To this is added the gelling powder stirred in cold water. Sugar can, but does not have to be added, so the degree of sweetness depends entirely on personal taste. A fruit mousse, made from fresh strawberries for example, is a quick dessert to prepare. To make it, first puree the fruit and stir in the agar agar that has been boiled up with a little liquid. Cool, stiffly whipped cream is added. The mixture is then placed in small molds to cool – and that’s it. Vegetable dishes can also be prepared excellently with agar agar, such as a delicious terrine: For this purpose, various vegetables are cut into bite-sized pieces, sautéed and seasoned. Then deglaze the vegetables with broth and add the agar agar. Now and should simmer for a while before pouring into a loaf pan, previously lined with aluminum foil, to cool.

Buy and store agar agar

The vegan gelling agent is available in organic food stores and health food stores. Well-stocked supermarkets also carry the product. Agar agar is also available online. The slightly higher price of agar agar is more than compensated for by the yield of the powder. Once opened, the product should be kept tightly closed and in a dry place.

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