Vacuum tube

pregnancy. The delicate muscle fibers can be damaged — damage that may go unnoticed until she is far into a later, wanted pregnancy and the muscles give way in a miscarriage. The injuries caused by the vacuum that pulls out the fetus hurts the cervix and rips it. When it scar the fallopian tubes it allows sperm to travel to to the egg. The egg then cannot leave the uterus, which leads to another abortion because the uterus is too small to carry the fetus in a wanted pregnancy. Many women grieve…

Introduction Phytoplankton require nutrients and light to survive. Certain nutrients are a limiting factor in phytoplankton competition and composition. Some phytoplankton are limited by nitrogen while others may be limited by phosphorus (Quigg, 2016). The experiment in this paper will determine if a body of water is limited by nitrogen or phosphorus by running a resource limitation assay. Nutrient levels in bodies of water may change seasonally in a natural way (Vanni and Temte, 1990).…

The atomic theory has come a long way since 400 B.C.E when the atomic model looked like a billiard ball, it is a very fundamental part of modern chemistry. About twenty four hundred years ago the first supporters of an atomic theory were the Greek philosophers Leucippus and Democritus who proposed the theory that matter could not be divided into smaller and smaller pieces over and over, he called these tiny pieces atomos. This comes from the meaning “cannot be cut”. He thought that atoms were…

Sharks don’t fossilize well because they’re from the class of chondrichthyes meaning their skeletons are made of cartilage, a flexible connective tissue. This is one of the reasons why there is a disagreement over when the first shark first existed. However, shark teeth do fossilize well and sharks produce thousands of teeth in a lifetime. The oldest shark teeth date back to the Devonian Period about 400 million years ago and were found in Europe. Shark scales also fossilize well.…

Abstract: In our most recent lab, before we could expand our knowledge about photosynthesis, we first had to understand its relationship with cellular respiration and how it can be further divided into photochemical and biochemical pathways. After achieving this knowledge, we furthered our understanding of photosynthetic reactions by and experimenting with the factors that affect photosynthesis, which are light intensity, pigments, and light wavelength. By experimenting with these factors, our…

Skylar Windholz Intro to Geography March 25, 2018 Book Review An Ocean of Air An Ocean of Air, written by Gabrielle Walker, mainly discusses the “Ocean of Air” that lives all around us, in which this ocean of air allows us to live. Nevertheless, it can do much more than that. Walker takes readers on a journey in only seven chapters with topics such as climate change, oxygen, the effects of chlorofluorocarbons, carbon dioxide, the ionosphere, and many more. The author also provides detailed…

in the end. From there, anhydrous sodium sulfate was used to pull any remaining water left and gravity filtration was performed to filter out the anhydrous product. The dichloromethane was then transferred and evaporated in a filter flask using a vacuum and it was done over low heat as to not evaporate any important things in the crude…

tested for is anencephaly. Anencephaly is a birth defect that ends in death a few hours after childbirth. The major parts of the brain, scalp, and skull of the baby do not form completely as it is developing in the uterus. It occurs when the neural tube does not close properly between the third and fourth weeks of pregnancy. An infant born with anencephaly has some or most of the brain missing, these infants are unconscious, can’t feel, and are normally deaf and blind. The infants die within…

The solid was then isolated through vacuum filtration, resulting in pale yellow-white powder. Next, acetone was used to dissolve the powered. This solution, a slightly cloudy yellow liquid, was then centrifuge, resulting in a clear yellow solution with solid impurities. The purified solution…

Molecules Project 1: Chemiluminescence Luuk Adema & Ewout van der Veer S2794640 & S2680254 luukadema@hotmail.com & ewoutvanderveer@msn.com 31-10-14 F. Mecozzi, E. Hagting & M. van Zuylen Abstract Luminol was synthesized and the light intensity of its luminescence was tested. The yield of the synthesis was 55%. Measurements of the intensity of luminescence were done under standard and optimal conditions resulting in peak intensities of ±0.02 lux (standard) and ±0.03 lux (optimal). It has been…