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1

The influence of religiosity on charitable behavior: A COPPS investigation

Sara E. Helms, Jeremy P. Thornton

Journal:

The Journal of Socio-Economics

Year:

2012

Language:

english

File:

PDF, 467 KB

english, 2012

2

Involuntary volunteering: The impact of mandated service in public schools

Journal:

Economics of Education Review

Year:

2013

Language:

english

File:

PDF, 580 KB

english, 2013

3

How Social Processes Distort Measurement: The Impact of Survey Nonresponse on Estimates of Volunteer Work in the United States1

Abraham, Katharine G., Helms, Sara, Presser, Stanley

Journal:

American Journal of Sociology

Year:

2009

Language:

english

File:

PDF, 222 KB

english, 2009

4

Prenatal Diagnosis of Down Syndrome: Mothers' Reflections on Supports Needed From Diagnosis to Birth

Helm, David T., Miranda, Sara, Chedd, Naomi Angoff

Journal:

Mental Retardation

Year:

1998

File:

PDF, 529 KB

1998

5

Convertible Debt Use and Corporate Governance

Sara Helms Robicheaux, Xudong Fu and James Allen Ligon

Journal:

Quarterly Journal of Business and Economics

Year:

2007

Language:

english

File:

PDF, 2.61 MB

english, 2007

6

An hypothesis-driven, molecular phylogenetics exercise for college biology students

Joel D. Parker, Robert E. Ziemba, Sara Helms Cahan, Steven W. Rissing

Journal:

Biochemistry and Molecular Biology Education

Year:

2004

Language:

english

File:

PDF, 373 KB

english, 2004

7

Comparison of two intraosseous infusion systems for adult emergency medical use

Thorsten Brenner, Michael Bernhard, Matthias Helm, Sara Doll, Alfred Völkl, Nicole Ganion, Claudia Friedmann, Marcus Sikinger, Jürgen Knapp, Eike Martin, André Gries

Journal:

Year:

2008

Language:

english

File:

PDF, 328 KB

english, 2008

8

Division of labor and the evolution of task sharing in queen associations of the harvester antPogonomyrmex californicus

Sara Helms Cahan, JenniferH. Fewell

Journal:

Behavioral Ecology and Sociobiology

Year:

2004

Language:

english

File:

PDF, 173 KB

english, 2004

9

Intergenerational effect of juvenile hormone on offspring inPogonomyrmexharvester ants

Sara Helms Cahan, Christopher J. Graves, Colin S. Brent

Journal:

Journal of Comparative Physiology B

Year:

2011

Language:

english

File:

PDF, 351 KB

english, 2011

10

Shift in frequency-dependent selection across the life-cycle in obligately interbreeding harvester ant lineages

Sara Helms Cahan, Glennis E. Julian

Journal:

Evolutionary Ecology

Year:

2010

Language:

english

File:

PDF, 320 KB

english, 2010

11

REPRODUCTIVE DIVISION OF LABOR BETWEEN HYBRID AND NONHYBRID OFFSPRING IN A FIRE ANT HYBRID ZONE

Sara Helms Cahan, S. Bradleigh Vinson

Journal:

Year:

2003

Language:

english

File:

PDF, 284 KB

english, 2003

12

Characterization and distribution of Pogonomyrmex harvester ant lineages with genetic caste determination

TANJA SCHWANDER, SARA HELMS CAHAN, LAURENT KELLER

Journal:

Molecular Ecology

Year:

2007

Language:

english

File:

PDF, 425 KB

english, 2007

13

Two alternate mechanisms contribute to the persistence of interdependent lineages in Pogonomyrmex harvester ants

TANJA SCHWANDER, LAURENT KELLER, SARA HELMS CAHAN

Journal:

Molecular Ecology

Year:

2007

Language:

english

File:

PDF, 202 KB

english, 2007

14

MECHANISMS OF REPRODUCTIVE ISOLATION BETWEEN AN ANT SPECIES OF HYBRID ORIGIN AND ONE OF ITS PARENTS

Tanja Schwander, Sevan S. Suni, Sara Helms Cahan, Laurent Keller

Journal:

Year:

2008

Language:

english

File:

PDF, 562 KB

english, 2008

15

Persistent melanocytic nevi: a review and analysis of 205 cases

Lacy L. Sommer, Sara M. Barcia, Loren E. Clarke, Klaus F. Helm

Journal:

Journal of Cutaneous Pathology

Year:

2011

Language:

english

File:

PDF, 729 KB

english, 2011

16

Complex hybrid origin of genetic caste determination in harvester ants

Helms Cahan, Sara, Keller, Laurent

Journal:

Year:

2003

Language:

english

File:

PDF, 195 KB

english, 2003

17

Genetic caste determination does not impose growth rate costs in Pogonomyrmex harvester ants

Sara Helms Cahan, Amanda B. Daly, Tanja Schwander, H. Arthur Woods

Journal:

Functional Ecology

Year:

2010

Language:

english

File:

PDF, 342 KB

english, 2010

18

An abrupt transition in colony founding behaviour in the antMessor pergandei

SARA CAHAN, KEN R HELMS, STEVEN W RISSING

Journal:

Animal Behaviour

Year:

1998

Language:

english

File:

PDF, 240 KB

english, 1998

19

Cooperation and conflict in ant foundress associations: insights from geographical variation

Sara Helms Cahan

Journal:

Animal Behaviour

Year:

2001

Language:

english

File:

PDF, 121 KB

english, 2001

20

Loss of Phenotypic Plasticity Generates Genotype-Caste Association in Harvester Ants

Sara Helms Cahan, Glennis E. Julian, Steven W. Rissing, Tanja Schwander, Joel D. Parker, Laurent Keller

Journal:

Current Biology

Year:

2004

Language:

english

File:

PDF, 106 KB

english, 2004

21

Maternal Effect on Female Caste Determination in a Social Insect

Tanja Schwander, Jean-Yves Humbert, Colin S. Brent, Sara Helms Cahan, Lucille Chapuis, Emanuela Renai, Laurent Keller

Journal:

Current Biology

Year:

2008

Language:

english

File:

PDF, 211 KB

english, 2008

22

Development and evaluation of a checklist assessing communication skills of oncologists: the COM-ON-Checklist

Sara Stubenrauch, Eva-Maria Schneid, Alexander Wünsch, Almut Helmes, Hartmut Bertz, Kurt Fritzsche, Michael Wirsching, Tanja Gölz

Journal:

Journal of Evaluation in Clinical Practice

Year:

2012

Language:

english

File:

PDF, 196 KB

english, 2012

23

The Stereospecificity of Hydrogen Transfer to NAD(P)+Catalyzed by Lactol Dehydrogenases

Sara B. Mostad, Heather L. Helming, Corwin Groom, Arthur Glasfeld

Journal:

Biochemical and Biophysical Research Communications

Year:

1997

Language:

english

File:

PDF, 104 KB

english, 1997

24

Regional variation in queen and worker aggression in incipient colonies of the desert antMessor pergandei

Helms, Ken R., Newman, Nathaniel J., Helms Cahan, Sara

Journal:

Behavioral Ecology and Sociobiology

Year:

2013

Language:

english

File:

PDF, 397 KB

english, 2013

25

Gender Differences in Formal and Informal Volunteering in Germany

Sara Helms, Tom McKenzie

Journal:

Voluntas: International Journal of Voluntary and Nonprofit Organizations

Year:

2014

Language:

english

File:

PDF, 262 KB

english, 2014

26

Environmental filtering of foraging strategies mediates patterns of coexistence in the fire ants Solenopsis geminata and Solenopsis xyloni , and their interspecific hybrids

AXEN, HEATHER J., WILDERMUTH, AMANDA, HELMS CAHAN, SARA

Journal:

Ecological Entomology

Year:

2014

Language:

english

File:

PDF, 900 KB

english, 2014

27

Sweat the small stuff: The effect of small incentive changes on participation in service-learning

Diette, Timothy M., Helms, Sara E.

Journal:

International Review of Economics Education

Year:

2013

Language:

english

File:

PDF, 286 KB

english, 2013

28

An in vivo hypoxia metagene identifies the novel hypoxia inducible factor target gene SLCO1B3

Ramachandran, Anassuya, Betts, Guy, Bhana, Sara, Helme, Gemma, Blick, Christopher, Moller-Levet, Carla, Saunders, Emma, Valentine, Helen, Pepper, Stuart, Miller, Crispin J., Buffa, Francesca, Harris,

Journal:

European Journal of Cancer

Year:

2013

Language:

english

File:

PDF, 1.09 MB

english, 2013

29

Extreme Genetic Differences between Queens and Workers in Hybridizing Pogonomyrmex Harvester Ants

Sara Helms Cahan, Joel D. Parker, Steven W. Rissing, Robert A. Johnson, Tatjana S. Polony, Michael D. Weiser and Deborah R. Smith

Journal:

Proceedings Biological Sciences

Year:

2002

Language:

english

File:

PDF, 1.16 MB

english, 2002

30

Mechanisms of Reproductive Isolation between an Ant Species of Hybrid Origin and One of Its Parents

Tanja Schwander, Sevan S. Suni, Sara Helms Cahan and Laurent Keller

Journal:

Year:

2008

Language:

english

File:

PDF, 1.47 MB

english, 2008

31

Afterlife incentives in charitable giving

Thornton, Jeremy Philip, Helms, Sara

Journal:

Applied Economics

Year:

2013

Language:

english

File:

PDF, 351 KB

english, 2013

32

Characterisation of long-term non-progression of HIV-1 infection after seroconversion: a cohort study

van der Helm, Jannie J, Geskus, Ronald, Lodi, Sara, Meyer, Laurence, Schuitemaker, Hanneke, Gunsenheimer-Bartmeyer, Barbara, Monforte, Antonella d'Arminio, Olson, Ashley, Touloumi, Giota, Sabin, Carol

Journal:

Year:

2014

Language:

english

File:

PDF, 414 KB

english, 2014

33

Lanthanide chelates of (bis)-hydroxymethyl-substituted DTTA with potential application as contrast agents in magnetic resonance imaging

Silvério, Sara, Torres, Susana, Martins, André F., Martins, José A., André, João P., Helm, Lothar, Prata, M. Isabel M., Santos, Ana C., Geraldes, Carlos F. G. C.

Journal:

Dalton Transactions

Year:

2009

Language:

english

File:

PDF, 381 KB

english, 2009

34

CXCR4 antagonism attenuates load-induced periosteal bone formation in mice

Leucht, Philipp, Temiyasathit, Sara, Russell, Ashley, Arguello, Juan F., Jacobs, Christopher R., Helms, Jill A., Castillo, Alesha B.

Journal:

Journal of Orthopaedic Research

Year:

2013

Language:

english

File:

PDF, 2.62 MB

english, 2013

35

Choosing to give more: experimental evidence on restricted gifts and charitable behaviour

Helms, Sara E., Scott, Brian L., Thornton, Jeremy P.

Journal:

Applied Economics Letters

Year:

2012

Language:

english

File:

PDF, 118 KB

english, 2012

36

Occlusive Irritant Dermatitis: When Is "Allergic" Contact Dermatitis Not Allergic?

Miller, Sara, Helms, Amy, Brodell, Robert T.

Journal:

SKINmed: Dermatology for the Clinician

Year:

2007

Language:

english

File:

PDF, 606 KB

english, 2007

37

Global invasion history of the tropical fire ant: a stowaway on the first global trade routes

Gotzek, Dietrich, Axen, Heather J., Suarez, Andrew V., Helms Cahan, Sara, Shoemaker, DeWayne

Journal:

Molecular Ecology

Year:

2015

Language:

english

File:

PDF, 1.36 MB

english, 2015

38

New experimental evidence on charitable gift restrictions and donor behaviour

Helms, Sara, Scott, Brian, Thornton, Jeremy

Journal:

Applied Economics Letters

Year:

2013

Language:

english

File:

PDF, 165 KB

english, 2013

39

Sa2005 Vasculitic Skin Rash As Initial Presentation in a Child With Crohn's Disease

Naramore, Sara, Falaiye, Tolulope, Zaenglein, Andrea, Scalzi, Lisabeth V., Helm, Klaus F., Alexander, Chandran P.

Journal:

Gastroenterology

Year:

2015

Language:

english

File:

PDF, 355 KB

english, 2015

40

REPRODUCTIVE DIVISION OF LABOR BETWEEN HYBRID AND NONHYBRID OFFSPRING IN A FIRE ANT HYBRID ZONE

Cahan, Sara Helms, Vinson, S. Bradleigh

Journal:

Year:

2003

Language:

english

File:

PDF, 291 KB

english, 2003

41

Trading the Television for a Textbook?: High School Exit Exams and Student Behavior

Diette, Timothy M., Helms, Sara E.

Journal:

The B E Journal of Economic Analysis & Policy

Year:

2014

Language:

english

File:

PDF, 472 KB

english, 2014

42

Phosphorylation of Elp1 by Hrr25 Is Required for Elongator-Dependent tRNA Modification in Yeast

Abdel-Fattah, Wael, Jablonowski, Daniel, Di Santo, Rachael, Thüring, Kathrin L., Scheidt, Viktor, Hammermeister, Alexander, ten Have, Sara, Helm, Mark, Schaffrath, Raffael, Stark, Michael J. R., Tuite

Journal:

Year:

2015

Language:

english

File:

PDF, 3.95 MB

english, 2015

43

Expression of somatostatin, dopamine, progesterone and growth hormone receptor mRNA in canine cortisol-secreting adrenocortical tumours

Kool, Miriam M.J., Galac, Sara, van der Helm, Noortje, Spandauw, Catharina G., Kooistra, Hans S., Mol, Jan A.

Journal:

The Veterinary Journal

Year:

2015

Language:

english

File:

PDF, 211 KB

english, 2015

44

Geographic and life-history variation in ant queen colony founding correlates with brain amine levels

Muscedere, Mario L., Helms Cahan, Sara, Helms, Ken R., Traniello, James F.A.

Journal:

Behavioral Ecology

Year:

2015

Language:

english

File:

PDF, 656 KB

english, 2015

45

Behavioral Differences between Pogonomyrmex rugosus and Dependent Lineage (H1/H2) Harvester Ants

Glennis E. Julian and Sara Helms Cahan

Journal:

Year:

2006

Language:

english

File:

PDF, 1.56 MB

english, 2006

46

Chronic ethanol self-administration in macaques shifts dopamine feedback inhibition to predominantly D2 receptors in nucleus accumbens core

Siciliano, Cody A., Calipari, Erin S., Yorgason, Jordan T., Mateo, Yolanda, Helms, Christa M., Lovinger, David M., Grant, Kathleen A., Jones, Sara R.

Journal:

Drug and Alcohol Dependence

Year:

2015

Language:

english

File:

PDF, 889 KB

english, 2015

47

How Do Genomes Create Novel Phenotypes? Insights from the Loss of the Worker Caste in Ant Social Parasites

Smith, Chris R., Helms Cahan, Sara, Kemena, Carsten, Brady, Seán G., Yang, Wei, Bornberg-Bauer, Erich, Eriksson, Ti, Gadau, Juergen, Helmkampf, Martin, Gotzek, Dietrich, Okamoto Miyakawa, Misato, Suar

Journal:

Molecular Biology and Evolution

Year:

2015

Language:

english

File:

PDF, 648 KB

english, 2015

48

Reproductive Division of Labor between Hybrid and Nonhybrid Offspring in a Fire Ant Hybrid Zone

Sara Helms Cahan and S. Bradleigh Vinson

Journal:

Year:

2003

Language:

english

File:

PDF, 1.63 MB

english, 2003

49

Increased presynaptic regulation of dopamine neurotransmission in the nucleus accumbens core following chronic ethanol self-administration in female macaques

Siciliano, Cody A., Calipari, Erin S., Yorgason, Jordan T., Lovinger, David M., Mateo, Yolanda, Jimenez, Vanessa A., Helms, Christa M., Grant, Kathleen A., Jones, Sara R.

Journal:

Psychopharmacology

Year:

2016

Language:

english

File:

PDF, 1.50 MB

english, 2016

50

The evolution of heat shock protein sequences, cis-regulatory elements, and expression profiles in the eusocial Hymenoptera

Nguyen, Andrew D., Gotelli, Nicholas J., Cahan, Sara Helms

Journal:

BMC Evolutionary Biology

Year:

2016

Language:

english

File:

PDF, 2.19 MB

english, 2016