Diversity and spatial patterns in plant and animal communities are well documented as a positive-power law of a taxa-area relationship (TAR). At present little is known whether this also applies to soil microbial communities and whether long-term fertilization has an influence on the underlying microbial diversity. To test the effects of long-term fertilization on above-ground botanical diversity and below-ground microbial diversity, a nested sampling approach on Park Grass plots (12d& 11/2c) of Rothamsted Reseach in United Kingdom, both at ~;; pH 5 but with plant diversities of between 42 and 13 respectively were used. GeoChip 3.0, covering approximately 57, 000 gene sequences of 292 gene families involved in nitrogen, carbon, sulfur and phosphorus cycling, metal reduction and resistance, and organic contaminant degradation, was used to determine the gene area relationships for both functional and phylogenetic groups and the relationship to plant diversity. Our analysis indicated that the microbial communities were separated by different plant diversity based on DCA. The soil microbial diversity was in accord with plant diversity. Soil microbial community exhibited different z value with different plant diversity, z = 0.0449 with higher plant diversity and z = 0.0583 with lower plant diversity (P< 0.0001). These results suggest that …

The environmentally relevant Desulfovibrio species are sulfate-reducing bacteria that are of interest in the bioremediation of heavy metal contaminated water. Among these, the genome of D. vulgaris Hildenborough encodes a large number of two component systems consisting of 72 putative response regulators (RR) and 64 putative histidinekinases (HK), the majority of which are uncharacterized. We classified the D. vulgaris Hildenborough RRs based on their output domains and compared the distribution of RRs in other sequenced Desulfovibrio species. We have successfully purified most RRs and several HKs as His-tagged proteins. We performed phospho-transfer experiments to verify relationships between cognate pairs of HK and RR, and we have also mapped a few non-cognate HK-RR pairs. Presented here are our discoveries from the Desulfovibrio RR categorization and results from the in vitro studies using purified His tagged D. vulgaris HKs and RRs.

This paper examines three models used to estimate the maximum power (P{sub m}) of PV modules when the irradiance and PV cell temperature are known: (1) the power temperature coefficient model, (2) the PVFORM model, and (3) the bilinear interpolation model. A variation of the power temperature coefficient model is also presented that improved model accuracy. For modeling values of P{sub m}, an 'effective' plane-of-array (POA) irradiance (E{sub e}) and the PV cell temperature (T) are used as model inputs. Using E{sub e} essentially removes the effects of variations in solar spectrum and reflectance losses, and permits the influence of irradiance and temperature on model performance for P{sub m} to be more easily studied. Eq. 1 is used to determine E{sub e} from T and the PV module's measured short-circuit current (I{sub sc}). Zero subscripts denote performance at Standard Reporting Conditions (SRC).

This poster illustrates a study to determine if concerns and depression change over time for each gender after receiving an HIV diagnosis and throughout the disease course.

In environments where the amount of the inorganic electron acceptors (oxygen, nitrate, sulfate, sulfur oroxidized metal ions (Fe3+;Mn4+) is insufficient for complete breakdown of organic matter, methane is formed as the major reduced end product. In such methanogenic environments organic acids are degraded by syntrophic associations of fermenting, acetogenic bacteria (e.g., sulfate-reducing bacteria (SRB) as"secondary fermenters") and methanogenic archaea. In these consortia, the conversion of lactate to acetate, CO2 and methane depends on the cooperating activities of both metabolically distinct microbial groups that are tightly linked by the need to maintain the exchanged metabolites (hydrogenandformate) at very low concentrations.

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Poster for the 2015 Medical Library Association Annual Meeting and Exhibition. This poster discusses recommended library contributions to the retention of premedical students.

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This poster examines forgiveness, self-esteem, and depression in a college population.

This poster examines how spirituality, stigma, anger and stress can account for a significant proportion of the variance in forgiveness in an HIV+ sample.

D. vulgaris Hildenborough has 72 response regulators. The Desulfovibrio are sulfate reducing bacteria that are important in the sulfur and carbon cycles in anoxic habitats. Its large number of two componenent systems are probably critical to its ability to sense and respond to its environment. Our goal is to map these RRs to the genes they regulate using a DNA-affinity-purification-chip (DAP-chip) protocol. First target determined usuing EMSA. A positive target was determined for as many RRs as possible using EMSA. Targets were selected based on gene proximity, regulon predictions and/or predicted sigma54 dependent promoters. qPCR was used to ensure that the target was enriched from sheared genomic DNA before proceeding to the DAP-chip.

Multiple sets of chemotaxis genes including three cheA homologs were identified in the genome sequence of the anaerobic bacterium Desulfovibrio vulgaris Hildenborough. Each CheA is a histidine kinase (HK) and part of a two component signal transduction system. Knock out mutants in the three cheA genes were created using single cross-over homologous recombination insertion. We studied the phenotypes of the cheA mutants in detail and discovered that ?cheA-3 has a non swarming/swimming phenotype both in the soft agar plates and Palleroni chamber assays. CheA-3 shows similarity to the Shewanella oneidensis CheA-3 and the Vibrio cholerae CheA-2 that are responsible for chemotaxis in the respective organisms. We did not find any morphological or structural differences between the three Delta cheA mutants and the wild type cells in electron microscopy. Our results from these studies are presented.

This poster examines the relationships between the psychosocial factors of perceived stress, relationship avoidance, morality-conscience guilt, and the outcome of negative affect in college students.

Poster presented at the 2013 Texas Conference on Digital Libraries. This poster discusses research on the current quality assurance practices in the web archiving community.

This poster discusses how forgiveness of self may be more effective for HIV+ individuals with a negative self-image.

This poster highlighting the development of machine learning model to automate part of the process of digitizing and archiving documents from the Texas State Depository Program. This particular part of the process is the sorting of documents to facilitate metadata creation. It was presented at the 2023 Texas Conference on Digital Libraries (TCDL) held May 16-18, 2023 in Austin, Texas.

This poster was present at the International Association of Physical Education & Sport for Girls & Women (IAPESGW) 18th World Congress in May 2017 at Barry University, Miami Shores. The poster examines gender stereotypes of men and women's profile of conduct in athletics.

Poster for the 2017 Texas Conference on Digital Libraries. This poster discusses metadata remediation issues within the UNT Libraries TRAIL collection focused on identifying and measuring issues related to incomplete records and creation date discrepancies.

This poster applies the concept of an online community of practice in an effort to suggest how librarians can join together as a community to learn and to share ideas, strategies, and tools related to effective teaching and learning. It was presented at The Exchange an Association for Library Collections and Technical Services (ALCTS)/Library and Information Technology Association (LITA)/Library Leadership and Management (LLAMA) Collaboration held virtually on May 4, 6, & 8, 2020

This poster focuses on how to approach collaborative research. Learn how to choose team members, facilitate collaboration and organize all the elements of a project to create a successful publication or presentation. Also included are administrative responsibilities, thoughts on handling problems, examples of delineating responsibilities. It was presented at The Exchange an Association for Library Collections and Technical Services (ALCTS)/Library and Information Technology Association (LITA)/Library Leadership and Management (LLAMA) Collaboration held virtually on May 4, 6, & 8, 2020.

This poster presents results, workflows, and process insights into an Open Access publication review of UNT-affiliated authors. Publication data from 2019-2021 of UNT-affiliated authors was reviewed for the purpose of including it in the institutional repository, UNT Scholarly Works. It was presented at the Texas Conference on Digital Libraries which was held virtually May 23-26, 2022.

The role of tetraheme cytochrome c3 (CycA) in the metabolism of the sulfate-reducing bacterium Desulfovibrio vulgaris Hildenborough (DvH) was investigated by deletion of the cycA gene using a marker-exchange deletion strategy. A highly abundant periplasmic cytochrome, CycA has the important function of transferring electrons from periplasmic hydrogenases (Hyd, Hyn, Hys) to transmembrane complexes which transport the electrons to the cytoplasm where sulfate is reduced. Previous studies have indicated that during its interaction with periplasmic hydrogenases, CycA is also involved in the reduction of toxic metals. Growth of the cycA mutant strain on lactate as the electron donor and sulfate as the terminal electron acceptor showed that, despite its abundance, CycA is not essential for DvH growth. However, the rate of growth of the mutant strain was significantly lower, and the extent of growth less, than rates and extents of growth of the wild type and complement strains on lactate/sulfate medium. This indicates that a portion of the electrons generated from cytoplasmic lactate oxidation are transported by CycA for energy production, possibly in a hydrogen cycling mechanism employed to generate ATP. Failure of the mutant strain to grow on either formate or H2, with sulfate or sulfite as electron acceptors, further …

Poster illustrating issues involved in fully-implementing the Extended Date/Time Format (EDTF) standards in the UNT Libraries' digital collections, comprising The Portal to Texas History, the UNT Digital Library, and The Gateway to Oklahoma History.

Poster illustrating the workflow used in the University of North Texas (UNT) Digital Projects Unit to digitize large numbers of TRAIL (Technical Report and Image Library) documents.