Stephen T. Deyrup

Assistant Professor of Chemistry and Biochemistry

Phone: (518) 782‑6815
Email: sdeyrup@siena.edu

Stephen T. Deyrup

Degrees:

Ph.D. Chemistry University of Iowa
B.S. Biology/Biochemistry/Chemistry Stetson University

Bio:

B.S. Stetson University, 2001, Chemistry/Biology/Biochemistry

Ph.D. University of Iowa, 2006, Chemistry

Postdoctoral Research Associate, Cornell University/Boyce Thompson Institute, 2006-2009

Assistant Professor of Chemistry, Heidelberg University (Tiffin, OH), 2009-2012

Assistant Professor of Chemistry and Biochemistry, Siena College, 2012-Present

What I love about Siena:

I love teaching at Siena College because it is such a friendly and positive learning environment. The students tend to have a good attitude, a bright sense of humor, and high degree of humility. The faculty are extremely congenial, and the administration is supportive.

My Favorite courses to teach are:

Organic Chemistry - I enjoy helping students overcome such a challenging subject.

Chemical Ecology - I really get to know the students during the week-long trip to Florida.

Professional Experience:

Assistant Professor of Chemistry and Biochemistry Siena College 2012 - Now
Assistant Professor of Chemistry Heidelberg University 2009 - 2012
Postdoctoral Associate Cornell University/ Boyce Thompson Institute 2006 - 2009

Why I chose Siena:

I chose Siena College because it offered the right balance of teaching and research in the context of a positive and supportive environment.

Office Hours:

MON: 02:30 PM-04:30 PM
TUE:
WED: 02:30 PM-04:30 PM
THU:
FRI: 02:30 PM-03:30 PM

My current research:

I am primarily interested in discovering new bioactive chemicals from natural sources. My research group currently has several projects:

1) Exploring Fungi for Antibacterial Compounds- We do this by growing mold in a specific growth media designed to induce production of antibiotics. We then analyze the chemical extracts for composition and bioactivity.

2) Insect Chemical Ecology- We investigate the chemistry of insect chemical defenses.

3) Describing the Chemistry of Commercially Relevant Plants- Looking for new or known molecules of significance from plants that are used as ornamentals, foodstuffs, or flavorings.

4) Finding Uses for Natural Dyes- We are particularly interested in compounds that can be obtained from cheap plant or fungal sources and can be used as a lasing medium for a chemical dye laser.

My teaching philosophy:

Much of the learning process is completely under the control of the student (e.g, reading, studying, practicing examples), however the professor can affect the learing process in three ways: 1) present the material as clearly and logically as possible, 2) provide resources and opportunities to learn outside the classroom, and 3) engage the students.

The first of these can be acheived by careful planning of lectures, handouts, assignments, and other resources. Skills that build upon earlier skills must be emphasized to reinforce the connection and make the material seem more logical. Second, there are always varying abilities among students in a classroom. Therefore, it is important to provide opportunities for learning when not in class, for example, online problem sets that provide feedback, office hours, practice quizzes and exams. Finally, and probably most importantly, student buy-in is essential. I understand that not everyone (and dare I say it, most people) do not share my love for organic chemistry, but showing enthusiasm and using humor during lecture makes it less boring and more likely that someone will pay attention. I have found that the number one way to encourage students to try their best is to show that you care about them and their learning.

Therefore, I try to approach a class as if we are a team. I am the coach. I will instruct my students on the proper techniques to succeed. I will ask students to practice. I will provide additional opportunities for those who request it. I will do the best I can to motivate the team to work hard. The performance of each member of the team will then reflect what she/he did in preparing for the grade. With luck everyone will be proud of their effort and results.


Chemical Investigation of winter fireflies (Ellychnia corrusca) reveals lucibufagins
56th Annual Meeting of the American Society of Pharmacognosy
2015
Chemical Investigation of the Medicinal and Ornamental Plant Angelonia angustifolia Benth. Reveals Therapeutic Quantities of Lupeol
Fitoterapia, vol. 98
2014
Antipredator Activity and Endogenous Biosynthesis of Defensive Secretion in Larval and Pupal Delphastus catalinae (Horn)(Coleoptera:Coccinellidae)
Chemoecology, vol. 24
2014
Chemical Investigation of the Medicinal and Ornamental Plant Angelonia angustifolia Benth. Reveals Therapeutic Quantities of Lupeol
55th Annual Meeting of the American Society of Pharmacognosy, vol. 80
2014
2D NMR-Spectroscopic Screening Reveals Polyketides in Ladybugs
Proceedings of the National Academy of Science, vol. 108
2011
Hymenopsins A and B and a Macrophorin Analogue from a Fungicolous Hymenopsis sp.
Journal of Natural Products, vol. 73
2010
Kolokosides A-D: Four Triterpenoid Glycosides from a Hawaiian Isolate of Xylaria sp.
Journal of Natural Products, vol. 70
2007
New Peanut (Arachis hypogaea) Phytoalexin with Prenylated Benzenoid and But-2-enolide Moieties
Journal of Agricultural and Food Chemistry, vol. 54
2006
Caryophyllene Sesquiterpenoids from a Fungicolous Isolate of Pestalotiopsis disseminata
Journal of Natural Products, vol. 69
2006
Production of Stilbenoids and Phenolic Acids by the Peanut Plant at Early Stages of Growth
Journal of Agricultural and Food Chemistry, vol. 54
2006
A Good Endophyte of Maize: Acremonium zeae Antibiotics Inhibitory to Aspergillus flavus and Fusarium verticilliodes
Mycological Research, vol. 109
2005
Notes on the Introduced Ant, Quadristruma emmae (Hymenoptera: Formicidae) in Florida
Entomological News, vol. 110
1999
A Solvatochromic Method to Determine the Ground and Excited State Dipole Moments of Hydrogen-Bonding Dye
2015
7th Annual Undergraduate Research Symposium of the Eastern New York Chapter of the American Chemical Society, Loudonville, New York
Chemical Investigation of Impatiens hawkeri, a Plant with Uterotonic Activity
2015
Siena College Academic Celebration, Loudonville, New York
Chemical Investigation of Winter Fireflies (Ellychnia corrusca) Reveals Lucibufagins
2015
Siena College Academic Celebration, Loudonville, New York
Activating Silent Fungal Gene Clusters via Biorational Culturing
2015
Siena College Academic Celebration, Loudonville, New York
Isolation of Fluorophores from Natural Sources for Laser Dye Development
2015
Siena College Academic Celebration, Loudonville, New York
Chemical Investigation of the Medicinal and Ornamental Plant Angelonia angustifolia Benth. Reveals Therapeutic Quantities of Lupeol
2014
55th Annual Meeting of the American Society of Pharmacognosy, Oxford, Mississippi
Determination of the Excited State Dipole Moment of Chaetochromin B
2014
Academic Celebration Siena College, Loudonville, New York
Isolation and Fluorescence Characterization of Chalcones from Glycyrrhiza glabra
2014
Academic Celebration Siena College, Loudonville, New York
Therapeutic Quantities of Lupeol from Angelonia angustifolia
2014
6th Annual Eastern New York American Chemical Society Undergraduate Research Symposium, Loudonville, New York
Activating Silent Fungal Gene Clusters via Biorational Culturing
2013
Siena College Summer Research Symposium, Loudonville, New York
Activating Silent Fungal Gene Clusters via Biorational Culturing
2013
54th Annual Meeting of the American Society of Pharmacognosy, St. Louis, Missouri
Activating Silent Fungal Gene Clusters via Biorational Culturing
2013
Academic Celebration Siena College, Loudonville, New York
Activating Silent Fungal Gene Clusters via Biorational Culturing
2013
5th Annual Eastern New York American Chemical Society Undergraduate Research Symposium, Loudonville, New York
Delphastus catalinae: Tiny Beetles Big Chemistry
2009
50th Annual Meeting of the American Society of Pharmacognosy, Honolulu, Hawaii
Kolokosides A-D: Four Triterpenoid Glycosides from a Hawaiian Wood-Decay Fungus
2006
47th Annual Meeting of the American Society of Pharmacognosy, Washington, District of Columbia
A New Peanut Phytoalexin with Stilbene and Tetronic Acid Moieties
2005
18th Annual Aflatoxin Elimination Workshop, Raleigh, North Carolina
Three New Caryophyllene Sesquiterpenoids from a Fungicolous Isolate of Pestalotiopsis disseminata
2005
46th Annual Meeting of the American Society of Pharmacognosy, Corvallis, Oregon
Production of Pyrrocidines by the Maize Endophyte Acremonium zeae and their Occurrence in Infected Kernels
2004
45th Annual Meeting of the American Society of Pharmacognosy, Phoenix, Arizona
Venom Ontogeny in Dusky Pigmy Rattlesnakes (Sistrurus miliarius barbouri)
2000
64th Annual Meeting of the Florida Academy of Sciences, Melbourne, Florida
Identification of Membrane-Disruptive Activities in Snake Venom using a Liposome-Based Fluorescence Dequenching Assay
1999
217th ACS National Meeting, Anaheim, California