To see the other types of publications on this topic, follow the link: Stem cells – Research.

Dissertations / Theses on the topic 'Stem cells – Research'

Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles

Select a source type:

Consult the top 50 dissertations / theses for your research on the topic 'Stem cells – Research.'

Next to every source in the list of references, there is an 'Add to bibliography' button. Press on it, and we will generate automatically the bibliographic reference to the chosen work in the citation style you need: APA, MLA, Harvard, Chicago, Vancouver, etc.

You can also download the full text of the academic publication as pdf and read online its abstract whenever available in the metadata.

Browse dissertations / theses on a wide variety of disciplines and organise your bibliography correctly.

1

Marshall, Gregory Paul. "Neurospheres and multipotent astrocytic stem cells neural progenitor cells rather than neural stem cells /." [Gainesville, Fla.] : University of Florida, 2005. http://purl.fcla.edu/fcla/etd/UFE0010047.

Full text
Abstract:
Thesis (Ph.D.)--University of Florida, 2005.<br>Typescript. Title from title page of source document. Document formatted into pages; contains 97 pages. Includes Vita. Includes bibliographical references.
APA, Harvard, Vancouver, ISO, and other styles
2

Elichabe, Benoît. "United States stem cells research boundaries." Thesis, Massachusetts Institute of Technology, 2007. http://hdl.handle.net/1721.1/39529.

Full text
Abstract:
Thesis (M.B.A.)--Massachusetts Institute of Technology, Sloan School of Management, 2007.<br>Includes bibliographical references (leaves [88]-90).<br>Recent empirical work has demonstrated the importance of a number of elements of scientific infrastructure that seem to be crucial particularly in fields such as molecular and cellular biology in which the materiality of research renders the process of replication and validation more complex. Scientific infrastructure has many interconnecting elements such as the ability to exchange material used in experiments, the ability to share ideas and inf
APA, Harvard, Vancouver, ISO, and other styles
3

Nortjé, Nico. "The moral status of embryonic stem cell research in the South African context /." Link to the online version, 2007. http://hdl.handle.net/10019.1/1372.

Full text
APA, Harvard, Vancouver, ISO, and other styles
4

Chen, Shi. "Cryopreservation of human embryonic stem cells and hepatocytes." Thesis, University of Oxford, 2013. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.711665.

Full text
APA, Harvard, Vancouver, ISO, and other styles
5

Ngangan, Alyssa V. "Bioactive factors secreted by differentiating embryonic stem cells." Diss., Georgia Institute of Technology, 2011. http://hdl.handle.net/1853/44913.

Full text
Abstract:
Current therapeutic strategies to stimulate endogenous angiogenic processes within injured tissue areas are typically based on introducing exogenous pro-angiogenic molecules or cell populations. Stem cell transplantation for angiogenic therapy aims to deliver populations of cells that secrete angiogenic factors and/or engraft in the new branching vasculature within the damaged tissue. Utilizing stem or progenitor cells has been shown to induce a rather robust angiogenic response despite minimal repopulation of the host vasculature, suggesting that stem cells may provide paracrine factors tha
APA, Harvard, Vancouver, ISO, and other styles
6

Ericson, Robin J. "Bridging solutions to the religion and science conflict over human embryonic stem cell research." Fairfax, VA : George Mason University, 2007. http://hdl.handle.net/1920/2926.

Full text
Abstract:
Thesis (Ph. D.)--George Mason University, 2007.<br>Title from PDF t.p. (viewed Jan. 17, 2008). Thesis director: Richard E. Rubenstein. Submitted in partial fulfillment of the requirements for the degree of Doctor of Philosophy in Conflict Analysis and Resolution. Vita: p. 228. Includes bibliographical references (p. 222-227). Also available in print.
APA, Harvard, Vancouver, ISO, and other styles
7

Alawadhi, Aseel. "Human embryonic stem cell research : shaping regulations in Kuwait." Thesis, University of Aberdeen, 2016. http://digitool.abdn.ac.uk:80/webclient/DeliveryManager?pid=231070.

Full text
APA, Harvard, Vancouver, ISO, and other styles
8

Ke, Jin, and 柯金. "Transgenic stem cells for craniofacial bone reconstruction." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2010. http://hub.hku.hk/bib/B44362973.

Full text
Abstract:
Bone loss from the cranio-maxillofacial region is a major clinical problem affecting patients worldwide. Conventional treatment strategy includes the use of autogenous or allogeneic bone, biomaterials, and osteogenic growth factors. However, there has been no effective therapy for most cases so far. Stem cell-based gene therapy is the latest research method with possible applications in humans. The present study aims to (1) characterize rabbit mesenchymal stem cells (MSCs) relating to growth pattern, surface antigens, and the potential for multi-differentiation; (2) determine the transduction
APA, Harvard, Vancouver, ISO, and other styles
9

Renszel, Krystal Marie. "USING MUTAGENESIS AND STEM CELLS TO UNDERSTAND RETROVIRAL NEUROVIRULENCE." Kent State University / OhioLINK, 2009. http://rave.ohiolink.edu/etdc/view?acc_num=kent1254659655.

Full text
APA, Harvard, Vancouver, ISO, and other styles
10

Sukhdeo, Kumar. "Defining immunophenotypic signatures of stem cells." Case Western Reserve University School of Graduate Studies / OhioLINK, 2013. http://rave.ohiolink.edu/etdc/view?acc_num=case1373038255.

Full text
APA, Harvard, Vancouver, ISO, and other styles
11

Jacobs, Peter. "Immunohaematopoietic stem and progenitor cell transplantation - a thirty year prospective and systematic research investigation." Thesis, Stellenbosch : University of Stellenbosch, 2010. http://hdl.handle.net/10019.1/5232.

Full text
APA, Harvard, Vancouver, ISO, and other styles
12

Figueira, Edwin C. Medical Sciences Faculty of Medicine UNSW. "???Stem Cell Pathway??? gene expression in human foetal limbus and cadaveric human limbal epithelium." Awarded by:University of New South Wales. School of Medical Sciences, 2006. http://handle.unsw.edu.au/1959.4/27455.

Full text
Abstract:
Stem cells play a vital role in the turn over of permanently self-renewing tissues (e.g. corneal epithelium, epidermis, bone marrow). Stratified cornea epithelia serve, as ideal tissue models for studying ???stemness???, as the site of cells in the different stages of differentiation are anatomically easily identifiable. Studies targeting limbal stem cell maintenance, in-vitro gene expression during storage and differentiation will benefit future therapeutic applications (e.g. corneal transplantation). Knowledge of stem cell behaviour will help explain the pathophysiology of corneal related oc
APA, Harvard, Vancouver, ISO, and other styles
13

Lause, Gregory E. "Testing for Osteogenic Potential of Human Mesenchymal Stem Cells." University of Toledo Health Science Campus / OhioLINK, 2011. http://rave.ohiolink.edu/etdc/view?acc_num=mco1305310481.

Full text
APA, Harvard, Vancouver, ISO, and other styles
14

Calderone, Carli E. "Stem Cell Research: Science Education and Outreach." Miami University Honors Theses / OhioLINK, 2010. http://rave.ohiolink.edu/etdc/view?acc_num=muhonors1268751337.

Full text
APA, Harvard, Vancouver, ISO, and other styles
15

Copland, Paul S., and n/a. "Embryonic stem cell research and the metaphysics of identity." University of Otago. Dunedin School of Medicine, 2007. http://adt.otago.ac.nz./public/adt-NZDU20070914.141825.

Full text
Abstract:
Embryonic stem cell research has the potential to revolutionise both the practice of medicine and our understanding of the human body. Although the usual technical and financial limitations of research apply, perhaps the greatest obstacle to the progress of this research at the present time is the ethical concerns surrounding the destruction of early human embryos. The established debate over the ethical significance of the early embryo has thus taken on renewed importance. Within biology stem cell research has begun to overturn some long held assumptions about the roles of genes and cellula
APA, Harvard, Vancouver, ISO, and other styles
16

Kim, Jin Young Leo. "METABOLIC CONTROL OF THE EPIGENOME IN GLIOBLASTOMA STEM CELLS." Case Western Reserve University School of Graduate Studies / OhioLINK, 2019. http://rave.ohiolink.edu/etdc/view?acc_num=case157616602610095.

Full text
APA, Harvard, Vancouver, ISO, and other styles
17

Wang, Fangjing. "Biomedical Imaging of Stem Cells Using Reporter Genes." Case Western Reserve University School of Graduate Studies / OhioLINK, 2010. http://rave.ohiolink.edu/etdc/view?acc_num=case1261441999.

Full text
APA, Harvard, Vancouver, ISO, and other styles
18

Deng, Jie. "Neurogenesis of adult stem cells from the liver and bone marrow." [Gainesville, Fla.] : University of Florida, 2005. http://purl.fcla.edu/fcla/etd/UFE0009700.

Full text
Abstract:
Thesis (Ph.D.)--University of Florida, 2005.<br>Typescript. Title from title page of source document. Document formatted into pages; contains 143 pages. Includes Vita. Includes bibliographical references.
APA, Harvard, Vancouver, ISO, and other styles
19

Chang, Hana. "Anisotropic Adaptation of Stem Cells to Changing Mechanical Environments." Case Western Reserve University School of Graduate Studies / OhioLINK, 2012. http://rave.ohiolink.edu/etdc/view?acc_num=case1324013901.

Full text
APA, Harvard, Vancouver, ISO, and other styles
20

Guthrie, Steven Mitchell. "Hemangioblasts from hematopoietic stem cells to endothelial progenitor cells and their effector molecules /." [Gainesville, Fla.] : University of Florida, 2005. http://purl.fcla.edu/fcla/etd/UFE0010068.

Full text
Abstract:
Thesis (Ph.D.)--University of Florida, 2005.<br>Typescript. Title from title page of source document. Document formatted into pages; contains 95 pages. Includes Vita. Includes bibliographical references.
APA, Harvard, Vancouver, ISO, and other styles
21

Nortje, Nico. "The moral status of embryonic stem cell research in the South African context." Thesis, Stellenbosch : University of Stellenbosch, 2007. http://hdl.handle.net/10019.1/1372.

Full text
Abstract:
Thesis (DPhil (Philosophy))--University of Stellenbosch, 2007.<br>Should surplus embryos which are destined to be discarded be protected at all cost, to the extent that they cannot contribute to medical knowledge - knowledge which could benefit society at large? Are embryos people or merely items of property? Different moral theories address these questions in different ways. Deontologists argue that the end never justifies the means and that the right not to be killed is more fundamental than the obligation to save. Utilitarians, on the other hand, argue that certain criteria should be met be
APA, Harvard, Vancouver, ISO, and other styles
22

Espinha, Nuno Miguel Moura. "Bioprocess engineering of induced pluripotent stem cells for application in cell therapy and pre-clinical research." Master's thesis, Faculdade de Ciências e Tecnologia, 2014. http://hdl.handle.net/10362/11551.

Full text
APA, Harvard, Vancouver, ISO, and other styles
23

Petluru, Vipula. "Selective modulation of PPARγ activities in marrow mesenchymal stem cells and their effects on bone". University of Toledo Health Science Campus / OhioLINK, 2011. http://rave.ohiolink.edu/etdc/view?acc_num=mco1310132031.

Full text
APA, Harvard, Vancouver, ISO, and other styles
24

Swaminathan, Ganesh. "Evaluation Of Adult Stem Cell Derived Smooth Muscle Cells For Elastic Matrix Regenerative Repair." University of Akron / OhioLINK, 2016. http://rave.ohiolink.edu/etdc/view?acc_num=akron1462209321.

Full text
APA, Harvard, Vancouver, ISO, and other styles
25

Oñate, Monje Lorena de 1985. "Research on cardiac differentiation from human pluripotent stem cells: how to get beating cells in a dish." Doctoral thesis, Universitat Pompeu Fabra, 2015. http://hdl.handle.net/10803/398575.

Full text
Abstract:
Probably, the gain in organ complexity and cell function has led to a decrease in healing capacities in the adult mammalian heart. In an effort to generate new venues for the generation of functional cardiac cells, in the present work we have explored the possibility to manipulate cell fate and plasticity making use of different technologies. First, and taking advantage of somatic cell reprogramming we have generated induced pluripotent stem cells (iPSCs) from umbilical cord derived mesenchymal stem cells (ucMSCs), an amenable source of stem cells in the clinical setting. In a very simple ma
APA, Harvard, Vancouver, ISO, and other styles
26

Santiago-Torres, Juan E. "Fetal Mesenchymal Stem Cells Achieve Greater Gene Expression in Vitro, but Less Effective Osteoinduction in Vivo than Adult Mesenchymal Stem Cells." The Ohio State University, 2014. http://rave.ohiolink.edu/etdc/view?acc_num=osu1404561922.

Full text
APA, Harvard, Vancouver, ISO, and other styles
27

Kandimalla, Yugandhar. "Study of Chitosan Microparticles with Bone Marrow Mesenchymal Stem Cells for Bone Tissue Regeneration." University of Toledo Health Science Campus / OhioLINK, 2009. http://rave.ohiolink.edu/etdc/view?acc_num=mco1250778129.

Full text
APA, Harvard, Vancouver, ISO, and other styles
28

江卓庭 and Cheuk-ting Kong. "Understanding the function of the Mll-een leukaemic fusion gene by embryonic stem cell approaches." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2003. http://hub.hku.hk/bib/B31244312.

Full text
APA, Harvard, Vancouver, ISO, and other styles
29

Joshi, Ramila Joshi. "Micro-engineering of embryonic stem cells niche to regulate neural cell differentiation." University of Akron / OhioLINK, 2018. http://rave.ohiolink.edu/etdc/view?acc_num=akron1544029342969082.

Full text
APA, Harvard, Vancouver, ISO, and other styles
30

Baird, Janet W. "Molecular analysis of putative haemopoietic gene products derived from murine embryonal stem cells." Thesis, Open University, 2001. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.369024.

Full text
APA, Harvard, Vancouver, ISO, and other styles
31

Meriweather, Veronica. "Stem Cells Research for the Enhancement Cardiac Regeneration: The Current Role of Multi- and Pluri-Potent Cells in Injury Repair." Master's thesis, Temple University Libraries, 2012. http://cdm16002.contentdm.oclc.org/cdm/ref/collection/p245801coll10/id/159475.

Full text
Abstract:
Physiology<br>M.S.<br>The study of cardiac regeneration can have many forms in which it is defined. It can not only be the ability to add new myocardium to dead or dying tissues, but also include the prevention of cardiac tissue degeneration, reversal of tissue remodeling, and the maintenance of systolic and diastolic function in the incidence of tissue damage, which can lead to subsequent heart failure progression. The use of stem cells for cardiac regeneration represents a growing field of new therapies for patients with end stage cardiac disease. Various studies have noted promising results
APA, Harvard, Vancouver, ISO, and other styles
32

Manninen, Bertha Alvarez. "When does a human being gain a moral right to life? an ethical and metaphysical study of abortion and embryonic stem cell research /." online access from Digital Dissertation Consortium, 2006. http://libweb.cityu.edu.hk/cgi-bin/er/db/ddcdiss.pl?3251580.

Full text
APA, Harvard, Vancouver, ISO, and other styles
33

Campbell, Ian. "Optimization of Methods for Generating Customized Gene-Edited Human Pluripotent Stem Cells." University of Cincinnati / OhioLINK, 2017. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1504802720510926.

Full text
APA, Harvard, Vancouver, ISO, and other styles
34

Chang, Chuan-Yuan Ally. "Analysis of Stem Cells and Wound Healing in the Human Cornea." Thesis, University of Auckland, 2009. http://hdl.handle.net/2292/4954.

Full text
Abstract:
PURPOSE:The limbus of the cornea is said to be the niche for limbal stem cells (LSCs) and the primary source of corneal epithelial maintenance. In this model, adult corneal epithelial cells are maintained by LSCs that cycle slowly and give rise to transient amplifying (TA) cells. These migrate centripetally, differentiate outwards to the surface, and are then lost by desquamation. This study set out to investigate the stem cell properties of human corneal epithelium and their contribution towards corneal epithelial regeneration after wounding. METHODS: Frozen sections of human corneal t
APA, Harvard, Vancouver, ISO, and other styles
35

Sargent, Carolyn Yeago. "Effects of hydrodynamic culture on embryonic stem cell differentiation: cardiogenic modulation." Diss., Georgia Institute of Technology, 2010. http://hdl.handle.net/1853/34710.

Full text
Abstract:
Stem and progenitor cells are an attractive cell source for the treatment of degenerative diseases due to their potential to differentiate into multiple cell types and provide large cell yields. Thus far, however, clinical applications have been limited due to inefficient differentiation into desired cell types with sufficient yields for adequate tissue repair and regeneration. The ability to spontaneously aggregate in suspension makes embryonic stem cells (ESCs) amenable to large-scale culture techniques for the production of large yields of differentiating cell spheroids (termed embryoid b
APA, Harvard, Vancouver, ISO, and other styles
36

Bratt-Leal, Andrés Miguel. "Biomaterial integration within 3D stem cell aggregates for directed differentiation." Diss., Georgia Institute of Technology, 2011. http://hdl.handle.net/1853/45934.

Full text
Abstract:
The derivation of embryonic stem cells (ESCs) has created an invaluable resource for scientific study and discovery. Further improvement in differentiation protocols is necessary to generate the large number of cells needed for clinical relevance. The goal of this work was to develop a method to incorporate biomaterial microparticles (MPs) within stem cell aggregates and to evaluate their use for local control of the cellular microenvironment for directed differentiation. The effects of unloaded MPs on ESC differentiation were first determined by controlled incorporation of poly(lactic-co-gl
APA, Harvard, Vancouver, ISO, and other styles
37

Jabero, Marvin Frank. "Investigation for the Identification of Transient Amplifying/Stem Cell Pool in Oral Mucosa." The Ohio State University, 2010. http://rave.ohiolink.edu/etdc/view?acc_num=osu1276788518.

Full text
APA, Harvard, Vancouver, ISO, and other styles
38

Morrison, Christa (De Swardt). "Human stem cell research : tracking media attention in time from 1998-2005." Thesis, Stellenbosch : University of Stellenbosch, 2006. http://hdl.handle.net/10019.1/1043.

Full text
Abstract:
Thesis (MA (Journalism))--University of Stellenbosch, 2006.<br>Moral questions arising from advances in science and technology are proliferating exponentially. Much controversy surrounds the ways in which biotechnology is used to eradicate a vast range of diseases and injuries. Stem cell research is one such way. Throughout the world stem cell research has been met with varying responses that range from opposition and criticism to approval and advocacy. As a result, it has attracted significant attention from the news media. The media have been accused of bias by focusing only on the controv
APA, Harvard, Vancouver, ISO, and other styles
39

Beligala, Dilshan Harshajith. "Stem-like cells and glial progenitors in the adult mouse suprachiasmatic nucleus." Bowling Green State University / OhioLINK, 2019. http://rave.ohiolink.edu/etdc/view?acc_num=bgsu1566319291491512.

Full text
APA, Harvard, Vancouver, ISO, and other styles
40

Wray, Jason Patrick. "Characterisation of a novel culture condition for the establishment and maintenance of mouse embryonic stem cells and implications for the mechanisms of self-renewal." Thesis, University of Edinburgh, 2009. http://hdl.handle.net/1842/3215.

Full text
Abstract:
Pluripotency is defined as the ability of a cell to give rise to all the cell types of the adult organism. In vivo this property is possessed transiently by the cells of the epiblast in the developing embryo but it can be maintained indefinitely by deriving embryonic stem (ES) cells. How the pluripotent state is established in the cells of the early embryo and how it is ‘captured’ and maintained in the form of ES cells is a fascinating question for biology with practical implications. It is hoped that ES cells will be of use in biomedical research and cell replacement therapy. Our understandin
APA, Harvard, Vancouver, ISO, and other styles
41

DiVincenzo, Lola S. "DIRECTION OF INDUCED PLURIPOTENT STEM CELL DIFFERENTIATION BY ENDOTHELIAL CELL SECRETOME." Kent State University / OhioLINK, 2015. http://rave.ohiolink.edu/etdc/view?acc_num=kent1438031276.

Full text
APA, Harvard, Vancouver, ISO, and other styles
42

Bhat, Samerna. "Impact of Nicotine and PPARd-agonist on Human Mesenchymal Stem Cells." University of Toledo Health Science Campus / OhioLINK, 2013. http://rave.ohiolink.edu/etdc/view?acc_num=mco1366337315.

Full text
APA, Harvard, Vancouver, ISO, and other styles
43

Flavahan, William Alexander. "Glioma Stem Cells Adapt to Restricted Nutrition Through Preferential Glucose Uptake." Case Western Reserve University School of Graduate Studies / OhioLINK, 2014. http://rave.ohiolink.edu/etdc/view?acc_num=case1384252748.

Full text
APA, Harvard, Vancouver, ISO, and other styles
44

Aggarwal, Reeva. "Mechanisms of Human CD34+ Stem Cell-Mediated Regulation of Osteoporosis in a Preclinical Model." The Ohio State University, 2012. http://rave.ohiolink.edu/etdc/view?acc_num=osu1354637444.

Full text
APA, Harvard, Vancouver, ISO, and other styles
45

Witek, Rafal Piotr. "Novel application of gene therapy and somatic stem cells in treating metabolic liver disorders." [Gainesville, Fla.] : University of Florida, 2005. http://purl.fcla.edu/fcla/etd/UFE0009820.

Full text
Abstract:
Thesis (Ph.D.)--University of Florida, 2005.<br>Typescript. Title from title page of source document. Document formatted into pages; contains 127 pages. Includes Vita. Includes bibliographical references.
APA, Harvard, Vancouver, ISO, and other styles
46

Kim, Saejeong. "USE OF ENDOTHELIAL-SPECIFIC PROMOTERS TO IDENTIFY AND SELECT DIFFERENTIATING STEM CELLS." Case Western Reserve University School of Graduate Studies / OhioLINK, 2009. http://rave.ohiolink.edu/etdc/view?acc_num=case1237483364.

Full text
APA, Harvard, Vancouver, ISO, and other styles
47

Samitsch, Marina. "Dissecting human haematopoietic progenitors." Thesis, University of Oxford, 2013. http://ora.ox.ac.uk/objects/uuid:58511f8d-cb36-4acf-b706-c465c50f5404.

Full text
Abstract:
Human haematopoiesis resembles a complex hierarchy, however most intermediate stages are only poorly defined. Efforts to characterise human progenitors have been inconsistent and failed to integrate previous knowledge. Furthermore, characterisation of normal progenitors has important implications in acute myeloid leukaemia (AML) biology. We previously established that leukaemic stem cells (LSCs) resemble the immunophenotypic progenitor compartments more closely than the stem cell fraction. Therefore, I set out to characterise human stem and progenitor cells (HSCPs) on phenotypic, molecular and
APA, Harvard, Vancouver, ISO, and other styles
48

Dunphy, Jaclyn Marie. "Infection of Neural Stem Cells with Murine Leukemia Viruses Inhibits Oligodendroglial Differentiation: Implications for Spongiform Neurodegeneration." Kent State University / OhioLINK, 2012. http://rave.ohiolink.edu/etdc/view?acc_num=kent1334343584.

Full text
APA, Harvard, Vancouver, ISO, and other styles
49

Seriola, Petit Anna. "Pluripotent stem cells as research models: the examples of trinucleotide repeat instability and X-chromosome inactivation." Doctoral thesis, Universitat Autònoma de Barcelona, 2015. http://hdl.handle.net/10803/325148.

Full text
Abstract:
Els models de malalties són una eina bàsica per la comprensió de les malalties humanes. Actualment, la majoria de la informació de la que disposem de malalties humanes es basa en models animals. Tot i això, els models animals difereixen molecular i fenotípicament dels humans, i no sempre reprodueixen fidelment la malaltia humana. En les últimes dècades, les cèl·lules mare humanes s’han establert com una opció molt interessant en el camp de la modelització cel·lular. En aquest treball hem volgut caracteritzar les cèl·lules mare embrionàries com a models per a l’estudi de la inestabilitat de la
APA, Harvard, Vancouver, ISO, and other styles
50

Lam, Phuong T. "Crispr/cas9-mediated genome editing of human pluripotent stem cells to advance human retina regeneration research." Miami University / OhioLINK, 2019. http://rave.ohiolink.edu/etdc/view?acc_num=miami1575372014701457.

Full text
APA, Harvard, Vancouver, ISO, and other styles
We offer discounts on all premium plans for authors whose works are included in thematic literature selections. Contact us to get a unique promo code!