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2012

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Inquiry-Based Instruction In The Social Studies: Successes And Challenges, Crystal Maree Beshears Dec 2012

Inquiry-Based Instruction In The Social Studies: Successes And Challenges, Crystal Maree Beshears

Graduate Theses and Dissertations

The purpose of this study was to investigate teachers' perceptions, understanding, and use of inquiry-based instruction in the Social studies, to assess the impact of inquiry-based units on instruction, to detail implementation successes and challenges reported by teachers when implementing inquiry-based instruction, and to provide recommendations for future efforts. Teachers' perceptions of teaching and learning, particularly their beliefs about inquiry-based instruction, changed during the study. Throughout the study, teachers' perceptions and beliefs about teaching Social studies had an impact on how they planned, implemented and reflected on inquiry-based instruction. Many of the teachers changed their perceptions and began regularly teaching …

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Meta-Analysis Of Wheat Qtl Regions Associated With Heat And Drought Stress, Marlovi Andrea Acuna Galindo Dec 2012

Meta-Analysis Of Wheat Qtl Regions Associated With Heat And Drought Stress, Marlovi Andrea Acuna Galindo

Graduate Theses and Dissertations

Heat and drought are the two most important environmental constraints to wheat production globally, are often present simultaneously and will become more severe with global climate change. This presents a unique challenge to wheat scientists who must work to develop wheat cultivars that are productive and adapted to future environmental conditions. A number of recent studies have reported quantitative trait loci (QTL) associated with heat and drought tolerance, as well as QTL for stress adaptive traits such as the availability of stem carbohydrates or crop canopy temperature. The objective of this study was to perform a meta-analysis of these QTL …

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Role Of Polymeric Excipients On Controlled Release Profile Of Glipizide From Plga And Eudragit Rs 100 Nanoparticles, Pratap Naha, Hugh Byrne, Amulya Panda Dec 2012

Role Of Polymeric Excipients On Controlled Release Profile Of Glipizide From Plga And Eudragit Rs 100 Nanoparticles, Pratap Naha, Hugh Byrne, Amulya Panda

Articles

Polylactic-co-glycolic acid (PLGA) 50:50 and Eudragit RS 100 nanoparticles entrapping glipizide along with excipients were prepared using single emulsion solvent evaporation method. The objective was to develop single oral dose glipizide nano particles for reducing blood sugar level in diabetes induced experimental animals. Incorporation of Polyethylene glycol (PEG) (0.5%), Hydroxypropyl methylcellulose (HPMC) (0.5%) and Tween 20 (0.5%) in the organic phase during particle formulation improved release profile of glipizide from the polymer particles. Entrapment efficiency of glipizide in all the polymeric formulations was around ~70 %. Around 80 % of glipizide was released from both PLGA and Eudragit …

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Effects Of Salinity On The Toxicity Of Ionic Silver And Ag-Pvp Nanoparticles To Tisbe Battagliai And Ceramium Tenuicorne, Ailbhe Macken, Hugh Byrne, Kevin Thomas Dec 2012

Effects Of Salinity On The Toxicity Of Ionic Silver And Ag-Pvp Nanoparticles To Tisbe Battagliai And Ceramium Tenuicorne, Ailbhe Macken, Hugh Byrne, Kevin Thomas

Articles

The toxic effects of polyvinylpyrrolidone (PVP) coated silver nanoparticles (Ag-NPPVP) and ionic Ag, to Tisbe battagliai (Tb) and Ceramium tenuicorne (Ct) were investigated and the usefulness of standardised marine guidelines for ENP risk assessment were assessed. The toxicity of Ag-NPPVP [CtEC50 = 26.6 µg/L, TbEC50 = 7.9 µg/L] and Ag+ [CtEC50 = 2312.2µg/L, Tb EC50 = 90.9 µg/L] to both test species differed, with the silver ENPs being more toxic. In contrast to Ag+ the toxicity of Ag-NPPVP increased significantly with increasing salinity, however, after thorough characterisation it was not …

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Reactive Oxygen Species Mediated Dna Damage In Human Lung Alveolar Epithelial (A549) Cells From Exposure To Non-Cytotoxic Mfi-Type Zeolite Nanoparticles, Kunal Bhattacharya, Pratap Naha, Izabela Naydenova, Svetlana Mintova, Hugh Byrne Dec 2012

Reactive Oxygen Species Mediated Dna Damage In Human Lung Alveolar Epithelial (A549) Cells From Exposure To Non-Cytotoxic Mfi-Type Zeolite Nanoparticles, Kunal Bhattacharya, Pratap Naha, Izabela Naydenova, Svetlana Mintova, Hugh Byrne

Articles

Increasing utilization of engineered nanoparticles in the field of electronics and biomedical applications demands an assessment of risk associated with deliberate or accidental exposure. Metal based nanoparticles are potentially most important of all the nanoparticles in terms of health risks. Microporousalumino-silicates and pure silicates named as zeolites and zeo-type materials with variety of structures, chemical compositions, particle sizes and morphologies have a significant number of industrial uses such as in catalysis, sorption and ion-exchange processes. In particular, the nanosized particles due to their unique properties are used in hybrid organic-inorganic materials for photography, photonics, electronics, labeling, imaging, and sensing. The …

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Adaptive Local And Global Synchronization And Phase Control Of Inferior Olive Neurons (Ions), Srujan Kumar Chalike Dec 2012

Adaptive Local And Global Synchronization And Phase Control Of Inferior Olive Neurons (Ions), Srujan Kumar Chalike

UNLV Theses, Dissertations, Professional Papers, and Capstones

Clusters of inferior olive neurons (IONs) in the olive-cerebellar system play an important role in providing synchronized motor control signals for the activation of large number of muscles. However, the dynamics of IONs are highly nonlinear and the system parameters are assumed to be unknowm. The IONs evolving from arbitrary initial conditions are not synchronized. However the application of IONs for control of BAUV's requires that IONs oscillate in unison. The objective is to design control laws such that the controlled ION tracks the trajectories of the reference ION. The two control laws are derived based on tuning functions adaptive …

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Nitrite Oxidation In Geothermal Springs: Evidence Of An Upper Temperature Limit For Thermophilic Nitrite-Oxidizing Bacteria Of 60 - 65 °C, Tara Edwards Dec 2012

Nitrite Oxidation In Geothermal Springs: Evidence Of An Upper Temperature Limit For Thermophilic Nitrite-Oxidizing Bacteria Of 60 - 65 °C, Tara Edwards

UNLV Theses, Dissertations, Professional Papers, and Capstones

Despite growing evidence of the importance of nitrification in terrestrial geothermal environments, little is known about nitrite oxidation in these environments. In order to further our knowledge, this study combined cultivation-dependent and -independent approaches with measurements of nitrogen speciation along the outflow channels of two Great Basin geothermal springs. Enrichment cultures were inoculated with sediment slurries from sites ranging in temperature from 42 - 87 °C at the sources and along the outflows of >15 hot springs. While attempts to enrich nitrite-oxidizing bacteria (NOB) from sites greater than or equal to 61 °C were unsuccessful, NOB were enriched from five …

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Sociosexuality, Mate Preferences, And Sex Steroid Hormone Levels Among Breastfeeding Women In Manila, Michelle Escasa Dec 2012

Sociosexuality, Mate Preferences, And Sex Steroid Hormone Levels Among Breastfeeding Women In Manila, Michelle Escasa

UNLV Theses, Dissertations, Professional Papers, and Capstones

This project investigates the influence of lactation on female sociosexuality and mate preferences in urban Manila, a population with long-term breastfeeding, low contraceptive use, and quick return to ovulatory cycling. Physiological and evolutionary considerations suggest that lactating women face important life history allocation trade-offs between mating and parenting effort that may be manifest in their sociosexual behavior and mate preferences. Breastfeeding (n=155) and control (n=105) women were recruited to provide a saliva sample (for testosterone and estradiol analyses), complete a questionnaire, and complete a face and voice preference task to determine preferences for masculinity. Breastfeeding women reported differences in commitment …

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Effect Of Nitrogen On Safflower Physiology And Productivity, Sj Mohamed, Aj Jellings, Mp Fuller Dec 2012

Effect Of Nitrogen On Safflower Physiology And Productivity, Sj Mohamed, Aj Jellings, Mp Fuller

School of Biological and Marine Sciences

Safflower (Carthamus tinctorius L.) is an oil-crop suitable for semi-arid agriculture, but its physiological response to agronomic inputs has yet to be fully evaluated. The effect of fertiliser on the physiology and production of safflower grown in pots filled with standard grade perlite inside a semi-controlled glass house was studied. Plants were initially irrigated with 20-100 ml standard hydroponic solution and then one month after germination plants were irrigated using 50-200 ml complete Hoagland’s solution, supplemented with one of eight levels of nitrogen (0, 25, 50, 75, 100, 125, 150, 175 kg N ha-1) in the form of ammonium nitrate. …

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Legal Issues, Rachel Levinson Esq. Nov 2012

Legal Issues, Rachel Levinson Esq.

Journal of Collective Bargaining in the Academy

No abstract provided.

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Praying Hands: Influences Of Religiosity And Spirituality On Sexual Risk-Taking Among Black, College-Attending Emerging Adults, Tralonda C. Triplett Nov 2012

Praying Hands: Influences Of Religiosity And Spirituality On Sexual Risk-Taking Among Black, College-Attending Emerging Adults, Tralonda C. Triplett

Open Access Dissertations

The Centers for Disease Control and Prevention have confirmed persistent disproportionate burdens of HIV/AIDS among Black populations in the United States. While treatment advancements have greatly improved qualities of life for persons living with HIV/AIDS, prevention efforts remain focused to reduce incidence among vulnerable populations. Research distinguishing emerging adulthood in the US has characterized it entailing identity formations influencing sexual risk-taking. Religiosity and spirituality have remained pivotal in Black cultures influencing beliefs and normative behaviors around pre-marital sex. The Praying Hands study combines ethnic, demographic, contextual and socio-environmental factors to investigate influences of religiosity and spirituality on HIV risks among …

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Volume 48 - Issue 09 - Friday, November 30, 2012, Rose Thorn Staff Nov 2012

Volume 48 - Issue 09 - Friday, November 30, 2012, Rose Thorn Staff

The Rose Thorn Archive

The Rose Thorn, Rose-Hulman's independent student newspaper.

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Universal Service Obligation And Loyalty Effects: An Agent-Based Modelling Approach, Dilyara Bakhtieva, Kamil Kiljański Nov 2012

Universal Service Obligation And Loyalty Effects: An Agent-Based Modelling Approach, Dilyara Bakhtieva, Kamil Kiljański

Yearbook of Antitrust and Regulatory Studies

In network industries, a Universal Service Obligation (USO) is often seen as a burden on an incumbent, which requires compensation for the net cost of such service provision. This paper estimates the effects of consumer loyalty as an intangible benefit of USO in the postal sector. In doing so, the agent-based modelling (ABM) approach is applied, which makes it possible to model the behaviour of boundedly rational consumers and is thus particularly appropriate for taking into account intangibles considerations. The analysis shows that loyalty is crucial to whether the USO uniform pricing constraint results in loss-making or profitability. Under certain …

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Faculty News Nov 2012

Faculty News

Sooner Lawyer Archive

No abstract provided.

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Gendered Governing: Leadership Experiences Of Seven Women Former Governors, Deborah A. Havens Nov 2012

Gendered Governing: Leadership Experiences Of Seven Women Former Governors, Deborah A. Havens

Master's Theses and Doctoral Dissertations

Fifty years ago, Second Wave feminists theorized that American culture was dominated by patriarchal systems that subordinated women to second class citizenship status (Brown, 1988; Dolan, Deckman & Swers, 2010). In the 21st century, women have become highly visible candidates for office on a national level. Since 1925, 31 women have served as governors; 20 were elected to office, three replaced their husbands, and eight became governor by Constitutional succession (CAWP, 2012). Many women of the Third Wave generation, or Post-feminists, reject the theory that male oppression continues to influence women’s life choices, some claiming that there is no need …

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Biochemical Reconstitution Of Hemorrhagic-Fever Arenavirus Envelope Glycoprotein-Mediated Membrane Fusion, Celestine J. Thomas, Sundaresh Shankar, Hedi E. Casquilho-Gray, Joanne York, Stephen Sprang, Jack H. Nunberg Nov 2012

Biochemical Reconstitution Of Hemorrhagic-Fever Arenavirus Envelope Glycoprotein-Mediated Membrane Fusion, Celestine J. Thomas, Sundaresh Shankar, Hedi E. Casquilho-Gray, Joanne York, Stephen Sprang, Jack H. Nunberg

Biological Sciences Faculty Publications

The membrane-anchored proteins of enveloped viruses form labile spikes on the virion surface, primed to undergo large-scale conformational changes culminating in virus-cell membrane fusion and viral entry. The prefusion form of these envelope glycoproteins thus represents an important molecular target for antiviral intervention. A critical roadblock to this endeavor has been our inability to produce the prefusion envelope glycoprotein trimer for biochemical and structural analysis. Through our studies of the GPC envelope glycoprotein of the hemorrhagic fever arenaviruses, we have shown that GPC is unique among class I viral fusion proteins in that the mature complex retains a stable signal …

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Comparison Of Coleoptera Emergent From Various Decay Classes Of Downed Coarse Woody Debris In Great Smoky Mountains National Park, Usa, Michael L. Ferro, Matthew L. Gimmel, Kyle E. Harms, Christopher E. Carlton Nov 2012

Comparison Of Coleoptera Emergent From Various Decay Classes Of Downed Coarse Woody Debris In Great Smoky Mountains National Park, Usa, Michael L. Ferro, Matthew L. Gimmel, Kyle E. Harms, Christopher E. Carlton

Insecta Mundi

Coleoptera species composition and succession in downed woody debris habitats are poorly known in eastern North America. A photoeclector emergence chamber was used to concentrate Coleoptera that emerged from various decay classes of fine and coarse woody debris (FWD and CWD, respectively) collected in primary and secondary forest sites in Great Smoky Mountains National Park, Tennessee, USA. A total of 5673 adult beetle specimens, representing 305 lowest identifiable taxa within 227 genera and 51 families, was collected. One hundred fifteen species (38%) were represented by single individuals. Many more specimens and species were collected from CWD (4129 and 247, respectively) …

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Phylogeny And Systematics Of The Giant Rhinoceros Beetles (Scarabaeidae: Dynastini), J. Mark Rowland, Kelly B. Miller Nov 2012

Phylogeny And Systematics Of The Giant Rhinoceros Beetles (Scarabaeidae: Dynastini), J. Mark Rowland, Kelly B. Miller

Insecta Mundi

This report contains the first inclusive phylogenetic analysis and taxonomic structure for the genera presently included within the scarabaeid tribe Dynastini. The study was based upon morphological, biogeographic and molecular data and yielded direct support for the recognition of three subtribes in the Dynastini: Dynastina MacLeay, New Status (Dynastes Kirby, Augosoma Burmeister, Megasoma Kirby, Golofa Hope), Xylotrupina Hope, New Status (Xylotrupes Hope, Allomyrina Arrow, Trypoxylus Minck, Xyloscaptes Prell) and Chalcosomina Rowland and Miller, New Subtribe (Chalcosoma Hope, Haploscapanes Arrow, Beckius Dechambre, Eupatorus Burmeister, Pachyoryctes Arrow). The results provide indirect but significant support for the origin of the …

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Comparison Of Three Collection Techniques For Capture Of Coleoptera, With An Emphasis On Saproxylic Species, In Great Smoky Mountains National Park, Usa, Michael L. Ferro, Matthew L. Gimmel, Kyle E. Harms, Christopher E. Carlton Nov 2012

Comparison Of Three Collection Techniques For Capture Of Coleoptera, With An Emphasis On Saproxylic Species, In Great Smoky Mountains National Park, Usa, Michael L. Ferro, Matthew L. Gimmel, Kyle E. Harms, Christopher E. Carlton

Insecta Mundi

Collection methods and/or habitats sampled influence how many and which species are captured during entomological surveys. Here we compare Coleoptera catches among three survey activities, each using a single collection method, at the same study sites in Great Smoky Mountains National Park, USA. Activities included: short-term flight intercept trapping (FITs); sifting/Berlese funneling of leaf litter and extremely decayed downed coarse woody debris; and using emergence chambers containing coarse woody debris of various decay classes. In total, 2472 adult beetle specimens, representing 217 lowest identifiable taxa within 164 genera and 42 families, were collected during the FIT survey. Each survey activity …

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Mental Health Treatment For Children And Adolescents: Cost Effectiveness, Dropout, And Recidivism By Presenting Diagnosis And Therapy Modality, David Fawcett Nov 2012

Mental Health Treatment For Children And Adolescents: Cost Effectiveness, Dropout, And Recidivism By Presenting Diagnosis And Therapy Modality, David Fawcett

Theses and Dissertations

As many as one in five children and adolescents may suffer from a mental health disorder, yet there are barriers that often prevent children from receiving optimal treatment. The current study explores the influence of practitioner license type, therapy modality, diagnosis, age, and gender on mental health therapy for children and adolescents. Data was provided by Cigna, a leading health care insurance provider in the United States. Participants include 106,374 boys (53.2%) and 93,753 girls (46.8%) ages 3 to 18 (M = 12.1, SD = 3.9) who were treated in outpatient facilities throughout the United States of America. Results indicate …

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Long Noncoding Rna (Lncrna) As A Biomarker And Therapeutic Marker In Cancer, Dave S B Hoon, Laurent Lessard Nov 2012

Long Noncoding Rna (Lncrna) As A Biomarker And Therapeutic Marker In Cancer, Dave S B Hoon, Laurent Lessard

Technology Transfer - Patents

Long noncoding RNAs (lncRNAs) that may be used as cancer biomarkers and methods of diagnosing, prognosing and monitoring cancer including, but not limited to, cutaneous melanoma using said lncRNAs are provided herein. In some embodiments, the methods include steps of isolating one or more lncRNA transcripts in a biological sample from the subject; measuring a test level of the one or more isolated lncRNA transcripts; comparing the test level to a control level of the one or more lncRNA transcripts; and diagnosing or making a prognosis based on the lncRNA level. In some embodiments, the lncRNA transcript is an linc00340 …

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Hydrologic Pulses Of Agricultural Waters: Effects On Wetland Plants And Soils In The Greenhouse, Constructed Drainage Ditches, And Bottomland Hardwood Forests, Melissa Boyce Koontz Nov 2012

Hydrologic Pulses Of Agricultural Waters: Effects On Wetland Plants And Soils In The Greenhouse, Constructed Drainage Ditches, And Bottomland Hardwood Forests, Melissa Boyce Koontz

Electronic Theses and Dissertations Archive

Upstream water management affects downstream ecology, especially the wetland plants and soil. The primary goal of this dissertation was to quantify the dynamic responses of plants and soil to variable hydrologic inputs. Measurements were taken at different spatial scales, which were in the greenhouse, constructed drainage ditches, and bottomland hardwood forests. Wetland plants grown in greenhouse conditions were exposed to variable hydrology and aqueous nitrogen fertilization treatments. The study species was rice cutgrass, Leersia oryzoides. Individual plants were able to modify physiological responses, elemental tissue concentrations, and biomass allocation in order to withstand environmental stress. The plants grown in partially …

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Gender Based Music Instrument Stereotypes And Counter-Stereotypes Portrayed In Children's Animated Media, Qiana M. Lamb Nov 2012

Gender Based Music Instrument Stereotypes And Counter-Stereotypes Portrayed In Children's Animated Media, Qiana M. Lamb

Electronic Theses and Dissertations Archive

This study investigated the appearance of gender based music instrument stereotypes and counter-stereotypes portrayed in children's cartoons. The images that were presented were organized by instrument families (i.e., brass, woodwind and percussion) and quantified to determine the frequency in which young children were exposed to specific music instrument stereotypes and counter-stereotypes. The results found that children's cartoons portrayed both music instrument stereotypes and counter-stereotypes, with certain instruments being shown as more stereotypical than others. The flute was played by only female characters and the majority of all brass instruments were performed by male characters. However, percussion instruments which are typically …

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Teacher Perceptions Of Middle School Concept Implementation And Effect Upon Science Achievement, Shelly Lindsey Bruce Nov 2012

Teacher Perceptions Of Middle School Concept Implementation And Effect Upon Science Achievement, Shelly Lindsey Bruce

Electronic Theses and Dissertations Archive

The current educational reform intends to enhance our nation's competitiveness through specific focus upon curricular and instructional improvement of math and science education for all students in America. The implementation of nationwide common internationally-benchmarked standards is purposed to advance student academic performance through enriched curriculum and better prepared teachers. This research investigates the relationship between school demographics and implementation of the middle school concept to improved science achievement. A teacher questionnaire and state testing data will be utilized to determine: (1) which middle school concept characteristics, within each of the three domains of curriculum, instruction and advising, and school governance, …

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The Effects Of Personal Grief On Organizational Outcomes: A Qualitative Investigation, Charlotte Ann Davis Nov 2012

The Effects Of Personal Grief On Organizational Outcomes: A Qualitative Investigation, Charlotte Ann Davis

Electronic Theses and Dissertations Archive

Most individuals experience considerable emotional pain and grief due to the death of someone near and dear to them in their lifetimes. These painful experiences have the potential to affect individually-valued and organizationally-valued outcomes. In most organizations, employees are provided with a very limited amount of time for coping with the grieving process before they are expected to perform the normal duties and responsibilities associated with their work roles. Even though we know that the process of grief associated with the loss of a loved one can have traumatic consequences for the employee, there is little in the research literature, …

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Agenda, University Of South Florida St. Petersburg General Education Committee Meeting, November 30, 2012, University Of South Florida St. Petersburg. Faculty Senate. General Education Committee Nov 2012

Agenda, University Of South Florida St. Petersburg General Education Committee Meeting, November 30, 2012, University Of South Florida St. Petersburg. Faculty Senate. General Education Committee

USF St. Petersburg General Education Committee Meetings

Agenda from the November 30, 2012, meeting of the General Education Committee of the University of South Florida St. Petersburg's Faculty Senate.

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Attack Rates Assessment Of The 2009 Pandemic H1n1 Influenza A In Children And Their Contacts: A Systematic Review And Meta-Analysis, Aharona Glatman-Freedman, Ian Portelli, Susan K. Jacobs, Justin I. Mathew, Jonathan E. Slutzman, Lewis R. Goldfrank, Silas W. Smith Nov 2012

Attack Rates Assessment Of The 2009 Pandemic H1n1 Influenza A In Children And Their Contacts: A Systematic Review And Meta-Analysis, Aharona Glatman-Freedman, Ian Portelli, Susan K. Jacobs, Justin I. Mathew, Jonathan E. Slutzman, Lewis R. Goldfrank, Silas W. Smith

Publications and Research

Background The recent H1N1 influenza A pandemic was marked by multiple reports of illness and hospitalization in children, suggesting that children may have played a major role in the propagation of the virus. A comprehensive detailed analysis of the attack rates among children as compared with their contacts in various settings is of great importance for understanding their unique role in influenza pandemics. Methodology/Principal Findings We searched MEDLINE (PubMed) and Embase for published studies reporting outbreak investigations with direct measurements of attack rates of the 2009 pandemic H1N1 influenza A among children, and quantified how these compare with those of …

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Daily Eastern News: November 30, 2012, Eastern Illinois University Nov 2012

Daily Eastern News: November 30, 2012, Eastern Illinois University

November

No abstract provided.

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Couple Works At, Gives Back To Alma Mater, Edwin Smith Nov 2012

Couple Works At, Gives Back To Alma Mater, Edwin Smith

University of Mississippi News

No abstract provided.

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Proteome Analyses Of Strains Cyanothece Atcc 51142 And Pcc 7822 Of The Diazotrophic Cyanobacterium Cyanothece Sp. Under Culture Conditions Resulting In Enhanced H2 Production., Uma K. Aryal, Stephen J. Callister, Sujata Mishra, Xiaohui Zhang, Janani I. Shutthanandan, Thomas E. Angel, Anil K. Shukla, Matthew E. Monroe, Ronald J. Moore, David W. Koppenhaal, Richard D. Smith, Louis A. Sherman Nov 2012

Proteome Analyses Of Strains Cyanothece Atcc 51142 And Pcc 7822 Of The Diazotrophic Cyanobacterium Cyanothece Sp. Under Culture Conditions Resulting In Enhanced H2 Production., Uma K. Aryal, Stephen J. Callister, Sujata Mishra, Xiaohui Zhang, Janani I. Shutthanandan, Thomas E. Angel, Anil K. Shukla, Matthew E. Monroe, Ronald J. Moore, David W. Koppenhaal, Richard D. Smith, Louis A. Sherman

Department of Biological Sciences Faculty Publications

Cultures of the cyanobacterial genus Cyanothece have been shown to produce high levels of biohydrogen. These strains are diazotrophic and undergo pronounced diurnal cycles when grown under N2-fixing conditions in light-dark cycles. We seek to better understand the way in which proteins respond to these diurnal changes, and we performed quantitative proteome analysis of Cyanothecesp. strains ATCC 51142 and PCC 7822 grown under 8 different nutritional conditions. Nitrogenase expression was limited to N2-fixing conditions, and in the absence of glycerol, nitrogenase gene expression was linked to the dark period. However, glycerol induced expression of nitrogenase during …

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