In our technical information section, we provide literature that gives in-depth information about our gelling agents and the differences between them. Some of the differences in our gelling agents are:
Some plants grow better in different gelling agents, but the most widely used is Agar (Prod # A111). Determining the best gelling agent for your application may require some trial and error. Checking the available literature is also helpful when determining what to use.
Yes. If this powder is still free-flowing it is fine for use. Many of our media are hygroscopic in nature. This means that when the powder is exposed to air, it absorbs water. This causes the powder to change from a white color to yellow. This reaction can also occur over time as the powder ages. It is advised that the container of media not be left open for extended periods of time when weighing, due to the hygroscopic nature of some of our products.
There are two things to look for when determining whether the media is no longer advisable for use:
NO! Products sold by PhytoTechnology Laboratories® are intended for plant research and laboratory use only. These products are not to be used as human or animal therapeutics, cosmetics, agricultural or pesticidal products, food additives, or as household chemicals.
We have a few different kinds of discounts available. If you purchase any package size in multiple amounts (a minimum of 10 units) we have quantity discounts depending on how much you purchase. To see the price differences you can add your desired amount into your online shopping cart and the prices will reflect any appropriate discounts for that quantity.
We also occasionally have sales and specials available on certain items that will be advertised across the website on occasion. We also have discounts built into the prices for our larger package sizes. For example, a 500 each package size will be more cost effective than purchasing 5 of our 100 each package sizes for that same product.
You can get a quote on our website including shipping but if you need a formalized quote you can request one by emailing our customer service department at firstname.lastname@example.org. Please be sure to include your shipping address, your item list including product IDs, quantities, and package sizes, as well as your desired shipping method. Please allow 5-7 business days for pricing and shipping calculations.
Yes, please send your order request to email@example.com. Please be sure to include your billing address, shipping address, product ID (product number), product quantity, product package size, as well as your preferred method of shipping. Also, we do not recommend emailing credit card information. If prepaying with a credit card, please call or fax this information.
Phone: 1.913.341.5343 or 1.888.749.8682 (USA only)
Fax: 1.913.341.5442 or 1.888.449.8682 (USA only)
While most hazardous products are safer to ship in smaller quantities, not incurring an extra product handling fee, other larger package sizes ship on their own and require a set hazardous handling fee as set by the Department of Transportation.
If you are ordering a hazardous liquid product, a standard vermiculite fee will be added to any package size ordered and larger package sizes may have a hazardous product and vermiculite fee.
For frozen and cooler items, you may specifically choose another shipping method such as ground or 2-day; however, PhytoTechnology Laboratories will not be held responsible for any damage to the product quality due to the exposure to heat or any other atmospheric properties during shipping. If you choose a shipping method that is not recommended and your product deteriorates in transit we will be unable to issue a refund or replace the item. We use faster methods of shipping as well as dry ice and blue ice for temperature sensitive items because we believe they are necessary to ensure the product quality once it reaches the customer. Anything shipping on dry ice will need to be shipped by a priority service in order to be effective. Each item is different based on its storage temperature. This information can be found on our website on the product's individual page.
Unfortunately every plant tissue is different in this respect. Many plant tissues can be disinfested using a dilution of household chlorine bleach in water with a wetting agent such as Tween 20® (product # P720). The concentration of bleach used and the exposure time to the bleach solution will vary based on many factors such as: type of plant tissue, age of plant tissue, time of year the tissues were collected (if outside), etc. These variables make it difficult to recommend any one protocol for tissue disinfestation.
We recommend doing a literature search to see if someone has published a method or protocol for your plant species, or a similar species. If the amount of plant tissues available is limited, it is recommended to start with a low concentration of bleach to reduce the chances of severely damaging the plant tissues. There are also other methods that use solutions such as VinOxide (combination of peroxide and vinegar) or NaDCC (product # D253) for disinfestation of tissues.
Microwave ovens are popular among hobbyists as a means to try to sterilize equipment and media. However, for research or production we do not recommend the use of a microwave for this application. There are some microorganisms, and especially their heat-resistant sports that can survive the boiling point of water (100 °C), which is why pressure is necessary to raise the sterilization temperature above boiling to 121 °C (250 °F) to fully sterilize equipment and media.
Unfortunately, without knowing what the microorganism it is it is difficult to determine how to treat it to control or eliminate it. There are labs that will identify microorganism samples, but they are expensive and it takes time. Also, there are some microorganisms that require a combination of antibiotic treatments to eliminate them. Unfortunately, some of these treatments can be very detrimental to plant tissues and may result in killing the plants long before it kills the contaminant.
In these situations, our recommendation is to first try to eliminate all microorganisms by effectively disinfesting (surface sterlizing) the tissues, e.g., 10% bleach solution with a wetting agent, such as Tween 20® (Prod # P720) instead of trying to come up with an antibiotic regime.