college laboratory

4

Scyphozoan Life Cycle

1. Planula : The free-swimming medusa is either female or male and produces eggs or sperm which combine to produce a larva, called a planula. The planula is planktonic and will float around until it finds a substrate to bind to.

2. Scyphistoma : Once the planula binds to a substrate it develops into a scyphistoma. Scyphistoma is a feeding polyp with protruding tentacles on top used to catch food particles.

3. Strobila : The polyp soon turns into a reproductive polyp with stacks of strobilae. The strobilae are immature medusa that are being asexually reproduced by the polyp.

4. Ephyra : When a strobila is mature it breaks away from the reproductive polyp as a planktonic ephyra.

5. Medusa : The ephyra matures into a full grown medusa.

You know you are a premed when...

*plans to wear something nice like a skirt or shorts to class tomorrow*

*remembers it’s lab day*

*remembers everyday is lab day*

*cries*

ID #48470

Name: Katie
Age: 18
Country: USA

I’m currently a college student, majoring in English (although I’m considering switching to Medical Laboratory Sciences… random, I know). I’m a writer and an avid reader, although I also have a passion for math and science. I love learning new things, travelling, and meeting new people. I speak English and am trying to learn Spanish, I love talking about politics, music, history, science… everything, really. I’m just looking for someone to talk to and have meaningful conversations with. Everyone is welcome–I do not discriminate.

Preferences: No preferences. If you write to me, I’ll write back.

How I prep labs

This is a methodology I developed over time (and labs!), but I wish I’d had it when I started. 

I use this method to prep all my labs now, but it’s especially useful for labs where the actual procedures are buried in paragraphs of wordy text, or the amounts or nature of reagents need to be changed. This happens to me most often when I’m pulling procedures from journal articles, but I find that even when I have a procedure written for an undergrad lab (i.e., a lab manual), the lab goes much smoother and I’m out faster when I prep it this way.

This preparation method really forces me to think about every single manipulation I’ll need in the lab. It takes me through each piece of glassware I’ll need, each reagent I’ll be taking, and how I can group/overlap steps for maximum efficiency. In some ways, I’m executing the lab once in my head and on pape before I even set foot in the lab.

Disclaimer: I’m a chem student, and I developed this method in and for my chem labs. I will be applying it to my biochem course this semseter and I’ll update if required!

Required: your lab procedure, looseleaf paper or a notebook (NOT your lab book!), and the ability to do research/look up constants/etc. (only rarely will actual literature be required, I usually use the open internet).

Steps!

1. I read the procedure/article/documentation, trying ot think of what I’ll actually be doing in the lab. This is where I catch any glaring errors/missing units/etc., and get a handle on what exactly I’ll be trying to accomplish. I mentally plan how the lab will flow (do I need the result from A to to B? Can I start A, let it run, and do B in the meantime?). If there are any techniques or concepts with which I’m not confident, I research them now.

2. Go back to the beginning of the procedure and write each actionable step in point form. Each item needed/action taken gets its own line. For example, here is what I prepared for one of my inorganic chemistry labs last semester: 

I start with the glassware everything is going in, then each reagent/piece of equipment gets its own line. I rearranged the preparation of the ice bath to go before the preparation of the reaction, instead of after where it was in the original procedure. I always write steps in the order I’ll be doing them. This is also when I adjust quantities and do any stoichiometry that goes along with that.

Keep reading

Doing some advanced reading (or highlighting??? haha) for tomorrow’s first Parasitology lecture. I’ve had a brief encounter with parasites from last semester’s Clinical Microscopy during our lectures and lab activities on Fecalysis. I guess I better start getting used to dealing with stool samples twice a week for the next few months to get to know more about these organisms haha.

5

Infraphylum Agnatha

Agnathans are a group of jawless fishes that include Myxini (hagfish) and Petromyzontidae (lampreys). Pictured above are Petromyzontidae, also known as lampreys.  The name “lamprey” is derived from Latin meaning “stone licker.” The most well known lamprey species are a parasitic and feed by boring into the flesh of other fish to suck their blood. However there are a some species of lamprey that non-parasitic.

Phylum Tardigrada

Tardigrades are commonly known as water bears. They have a cuticle and can go through ecdysis. Tardigrades have four pairs of clawed appendages, lay eggs, and have eyespots to detect light. Tardigrades are extremely adaptable and live in a large variety of habitats. Whenever they encounter unfavorable conditions, they can enter a form of hibernation called cryptobiosis. 

For more information about cryptobiosis and tardigrades, take a look at this article.

Welcome to UChicago...

A quiet college campus where the sky is grey, the air is still and cold and every morning, raven black monsters fly from tree to tree cawing, as we all huddle closer for warmth in the Regenstein library-bunker.


Welcome to UChicago.


The sun forgot to rise this past week, causing the temperature to drop to an all time low of -60 degrees, not that any one noticed, since it is a mere 20 degrees colder than the usual temperature of our ice-wastes. The University secret police has announced that classes, are not, in fact, cancelled. Any one who fails to show up to class will be executed, or worse, expelled


A look at our community calendar: The quarterly Humans vs. Zombies game has kicked off today. The Moderators would like to remind you that attendance is MANDATORY. All students without the proper armaments are to report to the center of the Quad to receive their $5 HvZ set which includes: a Smith & Wesson .44 Magnum Revolver, 2 bags of hollow-tipped rounds and several hand grenades with an accompanying launcher. Students who pay one dollar more will also receive an entirely useless but very cool looking crossbow. The Moderators would also like to remind you that this is just a game and that guns do not actually kill zombies. In fact, guns do not even kill people. Zombies are not even real, say The Moderators. Nothing is real. We are all immortal and it’s a miracle! The Moderators concluded their statement with this: all humans who claim that they have been irreversibly turned into a zombie after being bitten by one are merely hallucinating or suffering from a particularly virulent strain of Ebola. Please disregard these people. In fact, don’t even go near them, Ebola is very contagious, you know….


And now, a word from our sponsors: Do you like ipecac? Do you like illicit narcotics? Do you like vomiting uncontrollably….for science? Of course you do! You’re a college student. The DeWitt Laboratory of Human Behavioral Pharmacology of the Department of Psychiatry and Behavioral Neuroscience would like to recruit YOU to be their next study subject! Applicants must be old enough to make poor life choices and be of able and healthy constitution. All interested applicants should stand in the center of the Science Quad, facing GCIS and wave around a bag of illicit narcotics, shouting, “We want more drugs!”


Update on the sun that is failing to rise. University administrators are scrambling arrange an emergency Kuvia at the point in the hopes that the annual blood magic of sacrificing a first year in the firepits and the ritualistic “sun salutations” from the local students of the University will succeed in convincing the sun to rise again. The students of Dodd Mead are protesting this motion, as they claim they have not been given sufficient time to prepare their annual propaganda and indoctrination of their first years, and thus run the risk of losing the trophy filled with unrefined uranium traditionally awarded to the house with the greatest attendance. 


And now for some news: The Math Department, in an attempt at expanding their department’s dedication to theory over practice, have relinquished all earthly ties this last Tuesday. Several of the department’s faculty were last seen transcending their earthly bonds and transforming into strange nebulous masses of pure logic and reason. The department’s building, Eckhart Hall, has also decided to join this massive exodus from our spectral plane by becoming entirely translucent and then disappearing all together. Students trying to reach their classes in Eckhart, can still reach the building through the bridge from Ryerson or by praying in their dorm’s bloodstone circle, sacrificing a first year and writing out the proof of the Fundamental Theorem of Calculus in their blood if they do not wish to face the cold of the ice-wastes. The Philosophy Department has gone on record criticizing the Math Department for being entirely unoriginal, as the Philosophy Department had also left behind their earthly bonds several years prior. 


 The University Secret Police called a press conference today to remind people that Greek life does not exist. They stood outside Saieh Chapel and vehemently denied the existence of these so-called “fraternity” and “sorority” organizations. They continued this denial for several minutes and through a lengthy period of questioning from the gathered press which mostly consisted of pointing at the building directly connected to the Saieh Chapel and raising an eyebrow. “Greek Life is not real” they said, “Nu-uh. What is this ‘Panhellenic’ thing you keep talking about?  Show me a fraternity! Show me one of these so-called “frat-bro” students! You are not a frat bro. What’s a frat? Who let you in here?” They then ended the press conference with the customary rounding up, arrests and filing of restraining orders against dissenting members of the press.


Today, the Hunchback that lives in the tower above Rockefeller chapel played the Star Wars theme on the bells again, followed by a series of anime theme songs and several songs made popular by the internet, Including, but not limited to “Nyan Cat” and “Darude Sandstorm” When reached for comments, he only said “I did it for Scav” and “Lol I’m so quirky lol” before scurrying back up to his nest on a gargoyle overlooking University Ave.“ 

More to come…

5

Subphylum Cephalochordata

Subphylum Cephalochordata includes lancelets. This subphylum, along with subphylum Urochordata, is informally classified under protochordates. Protochordates are “primitive” chordates that are not vertebrates. Lancelets are marine filter feeders and show all five chordate characteristics throughout their life. These animals have finger-like projections near their mouth called cirri. These structures act as a coarse filter to screen out particles too large to consume. 

SO MY COLLEGE PROFESSOR IN LABORATORY IS FROM IRELAND AND SHE ASKED US WHAT WE KNOW ABOUT IRELAND
  • <p> <b>Everyone basically:</b> leprechauns, green, saint Patricks day<p/><b>Me:</b> Niall Horan. Point blank period.<p/><b></b> I've never seen that many students stare at me<p/></p>
5

Subphylum Urochordata

Subphylum Urochordata (also called Tunicata) includes tunicates, salps, and larvaceans. This subphylum, along with subphylum Cephalochordata, is informally classified under protochordates. Protochordates are “primitive” chordates that are not vertebrates. Most adult tunicates are sessile and do not show chordate characteristics. However tunicates have a free-swimming larval stage that exhibits all chordate characteristics. Tunicates get their name from the outer covering, called a tunic, which cloaks their body.

The first two photos show pictures of tunicate larva. The next three photos show pictures of adult tunicates.

4

Phylum Enchinodermata - Class Enchinoidea

Members of the Phylum Enchinodermata have a very unique system called the water vascular system.  The water vascular system is a hydraulic system used for locomotion, food and waste transportation, and respiration. The madroporite is a pore that acts as the opening for water to enter the water vascular system. The water travels down the stone canal to the centralized ring canal. From the ring canal the water travels to the edges of the organism using radial canals. From the radial canals water goes through lateral canals that connect to bulb-like sacks called ampulla. Each ampulla connect to a tube foot which is used for locomotion. Water pools in the ampulla and contractions of this small sack either retract or extend the tube feet.

Class Enchinoidea includes sea urchins, sand dollars, and sea biscuits. Sea urchins are considered regular because of their round shape. Sand dollars and sea biscuits are considered irregular because of their flattened shape. The madroporite is located in the center of the aboral surface. This class also has a unique structure called an Aristotle’s lantern. This structure is shown in the second photo and allows for increased mobility and control of the teeth.

The first photo shows a sea urchin without spines. The bottom left photo shows a picture of a sea biscuit and the bottom right photo shows a picture of some sand dollars.