Rising stem valves have stems that rise with the gate, providing a visual indication of whether the valve is open. There are two types of rising stem valves, one with a threaded nut and one with a threaded stem. Non-rising stem valves have gates that move up the stem, but no visual indication of their […]
Valve stems allow inflation of tires or tubes and can be standalone or connected to an internal tube. The Schrader valve is common on cars, while the Presta valve is used on bicycles. They can also be used on pressurized mechanisms like shock absorbers and air conditioning units. A valve stem is generally a cylindrical […]
Stem walls are concrete and steel structures that connect a building’s foundation to its vertical walls, providing stability and protection from soil moisture and insects. They are commonly used in residential and public buildings but not always necessary for raised designs. Stem walls are support structures that are used as a means of joining a […]
A drill shank test determines the geological composition of the area surrounding a drill pipe used for natural gas or oil extraction. The test helps determine if drilling in the area is viable and can take up to 24 hours. Safety precautions are necessary due to volatile materials. Sometimes known as a DST, a drill […]
Don’t throw away broccoli stems – they can be peeled and used in a variety of ways, such as roasting, steaming, or adding to soups. They are just as nutritious as the florets and can be cooked in the same way. Many people simply cut the florets off the top of the broccoli and then […]
Stem cell differentiation is the process where stem cells develop into specialized cells. Potency determines how many cell types a stem cell can mature into. Researchers study embryonic development to learn about birth defects and an organism’s biological history. Stem cell differentiation is a process in which a non-specialized stem cell develops into a particular […]
Stem cell research has potential to cure diseases but raises ethical concerns about human cloning and destruction of embryos. Stem cells can come from embryos or adult tissue, with embryonic stem cells having more uses. The ethical debate centers around the potential for human cloning and when life begins. Stem cell research is legal in […]
Stem cell technology studies stem cells in humans and animals, which have the potential to regenerate organs and treat diseases. The use of human embryos is controversial, but research is being done on using adult stem cells and synthesizing stem cells through gene manipulation. Stem cell technology is a field of medical research that studies […]
The stem group/crown group classification was created by Willi Hennig to classify relationships between living and extinct organisms. The crown group includes all living species and their extinct descendants up to the common ancestor, while the stem group includes all species not in the crown group. Stem groups provide insights into evolution and can contain […]
Becoming a stem cell researcher requires an academic foundation in biomedical sciences, including internships and advanced degrees. Specializing in molecular, developmental, or cellular biology can prepare you for research assignments. Internships and developing problem-solving and critical thinking skills can also help. Career prospects include working for public or private entities, pharmaceutical companies, universities, or healthcare […]
Stem cell transplants can treat diseases such as leukemia, lymphoma, and multiple myeloma. Donors can be the patient, a family member, or an unrelated person. Stem cells can be collected through bone marrow extraction, peripheral blood apheresis, or umbilical cord blood collection. Apheresis and cord blood sampling are less invasive methods. Stem cell transplants, also […]
Stem cell researchers experiment with embryonic or adult stem cells to find medical uses, record and interpret data, share results, and stay up-to-date with relevant research. They focus on specific medical fields and work in laboratories, often requiring advanced degrees. A stem cell researcher performs experiments on different types of stem cells in order to […]
