Digital Commons Network^™

Solvent Stable Microbial Lipases: Current Understanding And Biotechnological Applications, Barry Ryan, Priyanka Priyanka, Yeqi Tan, Gemma K Kinsella, Gary T. Henehan

Articles

Objective: This review examines on our current understanding of microbial lipase solvent tolerance, with a specific focus on the molecular strategies employed to improve lipase stability in a non-aqueous environment.

Results: It provides an overview of known solvent tolerant lipases and of approaches to improving solvent stability such as; enhancing stabilising interactions, modification of residue flexibility and surface charge alteration. It shows that judicious selection of lipase source supplemented by appropriate enzyme stabilisation, can lead to a wide application spectrum for lipases.

Conclusion: Organic solvent stable lipases are, and will continue to be, versatile and adaptable biocatalytic workhorses commonly employed …

The Goldilocks Approach: A Review Of Employing Design Of Experiments In Prokaryotic Recombinant Protein Production, Barry Ryan, Albert Uhoraningoga, Gemma K. Kinsella, Gary T. .. Henehan

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The production of high yields of soluble recombinant protein is one of the main objectives of protein biotechnology. Several factors, such as expression system, vector, host, media composition and induction conditions can influence recombinant protein yield. Identifying the most important factors for optimum protein expression may involve significant investment of time and considerable cost. To address this problem statistical models, such as Design of Experiments (DoE), have been used to optimise recombinant protein production. This review explores the application of DoE in the production of recombinant proteins, focusing on prokaryotic expression systems with a specific emphasis on media composition and …

Food Safety Knowledge And Practices Among Saudi Mothers, Wafa O. Ayaz, Anushree Priyadarshini, Amit Jaiswal

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This study examines food safety knowledge and practices of mothers in Saudi Arabia. A total of 979 respondents participated in the study and completed a questionnaire that accessed their knowledge of food storage, food handling, usage and maintenance of kitchen facilities, personal hygiene and food poisoning. Results showed that mothers in Saudi Arabia had moderate knowledge of food storage (passing rate 64.9%) and usage and maintenance of kitchen facilities (passing rate 66.5%). While they had good knowledge of personal hygiene (passing rate 83.8%) and food poisoning (passing rate 78.5%), their knowledge with regard to food handling was poor (passing rate …

Use Of Auto-Germ To Model Germination Timing In The Sagebrush-Steppe, William C. Richardson, Dallin R. Whitaker, Kyler P. Sant, Nicholas S. Barney, Ryan S. Call, Bruce A. Roundy, Zachary T. Aanderud, Matthew D. Madsen

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Germination timing has a strong influence on direct seeding efforts, and therefore is a closely tracked demographic stage in a wide variety of wildland and agricultural settings. Predictive seed germination models, based on soil moisture and temperature data in the seed zone are an efficient method of estimating germination timing. We utilized Visual Basic for Applications (VBA) to create Auto‐Germ, which is an Excel workbook that allows a user to estimate field germination timing based on wet‐thermal accumulation models and field temperature and soil moisture data. To demonstrate the capabilities of Auto‐Germ, we calculated various germination indices and modeled germination …

The Effect Of Temperature During Retail Display On The Colour Stability Of Co Pretreated Vacuum Packaged Beef Steaks, Lauren Anne Van Rooyen, Paul Allen, Eimear Gallagher, David I. O'Connor

Articles

The effect of CO pretreatments applied to beef striploin steaks (Longissimus thoracis et lumborum, LTL) prior to vacuum packaging and display temperature on colour stability, shelf life and tenderness was determined. Steaks were exposed to 5% CO, 60% CO2 and 35% N2for 3 (CO3), 5 (CO5) or 7 (CO7) h, followed by 28 days display at 2 °C (good industry practice) or 6 °C (mild abuse). CO5 was the optimum exposure time as it induced the desirable colour while not retaining the bright colour, irrespective of display temperature. K/Sratios confirmed that CO pretreatment did not mask spoilage and …

A Review On Bioconversion Of Agro-Industrial Wastes To Industrially Important Enzymes, Rajeev Ravindran, Shady S. Hassan, Gwilym A. Williams, Amit K, Jaiswal

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Agro-industrial waste is highly nutritious in nature and facilitates microbial growth. Most agricultural wastes are lignocellulosic in nature; a large fraction of it is composed of carbohydrates. Agricultural residues can thus be used for the production of various value-added products, such as industrially important enzymes. Agro-industrial wastes, such as sugar cane bagasse, corn cob and rice bran, have been widely investigated via different fermentation strategies for the production of enzymes. Solid-state fermentation holds much potential compared with submerged fermentation methods for the utilization of agro-based wastes for enzyme production. This is because the physical–chemical nature of many lignocellulosic substrates naturally …

Theobromine And Related Methylxanthines As Inhibitors Of Primary Amine Oxidase, Padraig Shanahan, Jeffrey O’Sullivan, Keith Tipton, Gemma Kinsella, Barry Ryan, Gary Henehan

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Methylxanthines are the most widely consumed drugs in the world and evidence of their health benefits has been growing in recent years. Primary Amine Oxidase (PrAO) has been recognised as a therapeutic target for amelioration of inflammatory, vascular and neurodegenerative diseases. Previous work in our laboratories showed that caffeine inhibited Bovine PrAO with a Ki of 1.0mM using benzylamine as substrate.

This study aimed to extend our previous work and explore the possibility that related methylxanthines might influence PrAO activity. While paraxanthine, theophylline and 7-methylxanthine had little effect on PrAO, theobromine was a noncompetitive inhibitor with a Ki of 276±44µM. …

Vegetation, Hydrologic, And Erosion Responses Of Sagebrush Steppe 9 Yr Following Mechanical Tree Removal, Christopher Jason Williams, Frederick B. Pierson, Patrick R. Kormos, Osama Z. Al-Hamdan, Sayjro K. Nouwakpo, Mark A. Weltz

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Land managers across the western United States are faced with selecting and applying tree-removal treatments on pinyon (Pinus spp.) and juniper (Juniperus spp.) woodland-encroached sagebrush (Artemisia spp.) rangelands, but current understanding of long-term vegetation and hydrological responses of sagebrush sites to tree removal is inadequate for guiding management. This study applied a suite of vegetation and soil measures (0.5 − 990 m²), small-plot rainfall simulations (0.5 m²), and overland flow experiments (9 m²) to quantify the effects of mechanical tree removal (tree cutting and mastication) on vegetation, runoff, and erosion at …

Isolation, Purification And Characterization Of A Novel Solvent Stable Lipase From Pseudomonas Reinekei, Barry Ryan, Priyanka Priyanka, Gemma K. Kinsella, Gary T. Henehan

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The Pseudomonas sp. have been long recognized for their exogenous lipolytic activities yet the genus still contains a lot of unexplored strains. Due to the versatile metabolic machinery and their potential for adaptation to fluctuating environmental conditions Pseudomonas sp. are of great interest for biotechnological applications. In this study, a new extracellularly produced lipolytic enzyme from Pseudomonas sp. (P. reinekei) was purified and characterized. The production of lipase from P. reinekei (H1) was enhanced 10-fold by optimizing the nitrogen source. The 50 kDa H1 lipase was purified using negative and positive mode anion exchange chromatography. The purified lipase was active …

Innovation In Rangeland Monitoring: Annual, 30 M, Plant Functional Type Percent Cover Maps For U.S. Rangelands, 1984-2017, Matthew O. Jones, Brady W. Allred, David E. Naugle, Jeremy D. Maestas, Patrick Donnelly, Loretta J. Metz, Jason Karl, Rob Smith, Brandon Bestelmeyer, Chad Boyd, Jay D. Kerby, James D. Mciver

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Innovations in machine learning and cloud‐based computing were merged with historical remote sensing and field data to provide the first moderate resolution, annual, percent cover maps of plant functional types across rangeland ecosystems to effectively and efficiently respond to pressing challenges facing conservation of biodiversity and ecosystem services. We utilized the historical Landsat satellite record, gridded meteorology, abiotic land surface data, and over 30,000 field plots within a Random Forests model to predict per‐pixel percent cover of annual forbs and grasses, perennial forbs and grasses, shrubs, and bare ground over the western United States from 1984 to 2017. Results were …

Resilience And Resistance In Sagebrush Ecosystems Are Associated With Seasonal Soil Temperature And Water Availability, Bruce A. Roundy, Jeanne C. Chambers, David A. Pyke, Richard F. Miller, Robin J. Tausch, Eugene W. Schupp, Benjamin Rau, Trevor Gruell

Articles

Invasion and dominance of exotic grasses and increased fire frequency threaten native ecosystems worldwide. In the Great Basin region of the western United States, woody and herbaceous fuel treatments are implemented to decrease the effects of wildfire and increase sagebrush (Artemisia spp.) ecosystem resilience to disturbance and resistance to exotic annual grasses. High cover of the exotic annual cheatgrass (Bromus tectorum) after treatments increases fine fuels, which in turn increases the risk of passing over a biotic threshold to a state of increased wildfire frequency and conversion to cheatgrass dominance. Sagebrush ecosystem resilience to wildfire and resistance …

Spatial And Temporal Changes In Ecosystem Carbon Pools Following Juniper Encroachment And Removal, Heather L. Throop, Kate Lajtha

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Proliferation of woody plants is a predominant global land cover change of the past century, particularly in dryland ecosystems. Woody encroachment and its potential impacts (e.g., livestock forage, wildlife habitat, hydrological cycling) have led to widespread brush management. Although woody plants may have substantial impacts on soils, uncertainty remains regarding woody encroachment and brush management influences on carbon (C) pools. Surface C pools (shallow soils and litter) may be particularly dynamic in response to encroachment and brush management. However, we have limited understanding of spatiotemporal patterns of surface C responses or how surface pools respond relative to aboveground C, litter, …

Hypoxia-Derived Exosomes Induce Putative Altered Pathways In Biosynthesis And Ion Regulatory Channels In Glioblastoma Cells, Rajshekhar A. Kore, Jacob L. Edmondson, Samir V. Jenkins, Azemat Jamshidi-Parsian, Ruud P.M. Dings, Nathan S. Reyna, Robert J. Griffin

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Hypoxia, a hallmark characteristic of glioblastoma (GBM) induces changes in the transcriptome and the proteome of tumor cells. We discovered that hypoxic stress produces significant qualitative and quantitative changes in the protein content of secreted exosomes from GBM cells. Among the proteins found to be selectively elevated in hypoxic exosomes were protein-lysine 6-oxidase (LOX), thrombospondin-1 (TSP1), vascular derived endothelial factor (VEGF) and a disintegrin and metalloproteinase with thrombospondin motifs 1 (ADAMTS1), well studied contributors to tumor progression, metastasis and angiogenesis. Our findings demonstrate that hypoxic exosomes induce differential gene expression in recipient glioma cells. Glioma cells stimulated with hypoxic exosomes …

Multicomponent Analysis Using A Confocal Raman Microscope, Zhengyuan Tang, Sinead J. Barton, Thomas E. Ward, John P. Lowry, Michelle M. Doran, Hugh Byrne, Bryan M. Hennelly

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Measuring the concentration of multiple chemical components in a low volume aqueous mixture by Raman spectroscopy has received significant interest in the literature. All of the contributions to date focus on the design of optical systems that facilitate the recording of spectra with high signal-to-noise ratio, by collecting as many Raman scattered photons as possible. In this study, the confocal Raman microscope set-up is investigated for multicomponent analysis. Partial Least Squares Regression is used to quantify physiologically relevant aqueous mixtures of glucose, lactic acid, and urea. The predicted error is 17.81 mg/dL for glucose, 10.6 mg/dL for lactic acid and …

Investigating The Role Of Gold Nanoparticle Shape And Size In Their Toxicities To Fungi, Kangze Liu, Zhonglei He, Hugh Byrne, James Curtin, Furong Tian Technological University Dublin

Articles

Gold nanoparticles (GNPs) are increasingly being used in a wide range of applications, and such they are being released in greater quantities into the environment. Consequently, the environmental effects of GNPs, especially toxicities to living organisms, have drawn great attention. However, their toxicological characteristics still remain unclear. Fungi, as the decomposers of the ecosystem, interact directly with the environment and critically control the overall health of the biosphere. Thus, their sensitivity to GNP toxicity is particularly important. The aim of this study was to evaluate the role of GNP shape and size in their toxicities to fungi, which could help …

Raman Spectral Analysis For Rapid Screening Of Dengue Infection, Tahir Mahmood, Haq Nawaz, A. Ditta, M.I. Majeed, M.A. Hanif, N. Rashid, H.N. Bhatti, H.F. Nargis, M. Saleem, Franck Bonnier, Hugh Byrne

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Infection with the dengue virus is currently clinically detected according to different biomarkers in human blood plasma, commonly measured by enzyme linked immunosorbent assays, including non-structural proteins (Ns1), immunoglobulin M (IgM) and immunoglobulin G (IgG). However, there is little or no mutual correlation between the biomarkers, as demonstrated in this study by a comparison of their levels in samples from 17 patients. As an alternative, the label free, rapid screening technique, Raman spectroscopy has been used for the characterisation/diagnosis of healthy and dengue infected human blood plasma samples. In dengue positive samples, changes in specific Raman spectral bands associated with …

Clinical Applications Of Infrared And Raman Spectroscopy: State Of Play And Future Challenges, Matthew Baker, Hugh Byrne, John Chalmers, Peter Gardner, Royston Goodacre, Alex Henderson, Sergei Kazarian, Francis Martin, Julian Moger, Nick Stone, Josep Sule-Suso

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Vibrational spectroscopies, based on Infrared absorption and/or Raman scattering provide a detailed fingerprint of a material, based on the chemical content. Diagnostic and prognostic tools based on these technologies have the potential to revolutionise our clinical systems leading to improved patient outcome, more efficient public services and significant economic savings. However, despite these strong drivers, there are many fundamental scientific and technological challenges which have limited the implementation of this technology in the clinical arena, although recent years have seen significant progress in addressing these challenges. This review examines (i) the state of the art of clinical applications of infrared …

Effectiveness Of Prescribed Fire To Re-Establish Sagebrush Steppe Vegetation And Ecohydrologic Function On Woodland-Encroached Sagebrush Rangelands, Great Basin, Usa: Part I: Vegetation, Hydrology, And Erosion Responses, Christopher Jason Williams, Frederick B. Pierson, Sayjro K. Nouwakpo, Osama Z. Al-Hamdan, Patrick R. Kormos, Mark A. Weltz

Articles

Pinyon (Pinus spp.) and juniper (Juniperus spp.) woodland encroachment has imperiled a broad ecological domain of the sagebrush steppe (Artemisia spp.) ecosystem in the Great Basin Region, USA. As these conifers increase in dominance on sagebrush rangelands, understory vegetation declines and ecohydrologic function can shift from biotic (vegetation) controlled retention of soil resources to abiotic (runoff) driven loss of soil resources and long-term site degradation. Scientists, public land management agencies, and private land owners are challenged with selecting and predicting outcomes to treatment alternatives to improve ecological structure and function on these rangelands. This study is the …

Enzymatic Extraction Of Fucoxanthin From Brown Seaweeds, Emer Shannon, Nissreen Abu-Ghannam

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Brown seaweeds contain a number of bioactive compounds. The xanthophyll, fucoxanthin, has in vivo efficacy against disorders such as type 2 diabetes, obesity and cancer. Organic solvents are traditionally employed to extract fucoxanthin, but carry a toxic chemical and environmental burden. The aim of this study was to optimise a fucoxanthin extraction method using enzymes, water, low-temperature dehydration and mechanical blending, to produce yields comparable to those achieved with an organic solvent (acetone). Response surface methodology was applied, using Fucus vesiculosus as a model species. A fucoxanthin yield of 0.657 mg g^-1 (dry mass) was obtained from F. …

Toxicological Assessment Of Nanomaterials: The Role Of In Vitro Raman Microspectroscopic Analysis, Esen Efeoglu, Marcus Maher, Alan Casey, Hugh Byrne

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The acceleration of nanomaterials research has brought about increased demands for rapid analysis of their bioactivity, in a multi-parametric fashion, to minimise the gap between potential applications and knowledge of their toxicological properties. The potential of Raman microspectroscopy for the analysis of biological systems with the aid of multivariate analysis techniques has been demonstrated. In this study, an overview of recent efforts towards establishing a ‘label-free high content nanotoxicological assessment technique’ using Raman microspectroscopy is presented. The current state of the art for cellular toxicity assessment and the potential of Raman microspectroscopy are discussed, and the spectral markers of the …

Toll-Like Receptor 3 L412f Polymorphism Promotes A Persistent Clinical Phenotype In Pulmonary Sarcoidosis, Gordon Cooke, Ijaz Kamal, Monika Strengert, Emily Hams, Leona Mawhinney, Aisling Tynan, Ciaran O’ Reilly, David N. O’ Dwyer, Steven L. Kunkel, Ulla G. Knaus, Denis C. Shields, David R. Moller, Andrew G. Bowie, Padraic G. Fallon, Cory M. Hogaboam, Michelle E. Armstrong, Seamas C. Donnelly

Articles

Background: Sarcoidosis is a multisystemic disorder of unknown etiology, characterised by the

presence of non-caseating granulomas in target organs. In ninety percent of cases, there is

thoracic involvement. Fifty to seventy percent of pulmonary sarcoidosis patients will experience

acute, self-limiting disease. For the subgroup of patients who develop persistent disease, no

targeted therapy is currently available.

Aim: To investigate the potential of the single nucleotide polymorphism (SNP), Toll-like

receptor 3 Leu412Phe (TLR3 L412F; rs3775291), as a causative factor in the development of,

and in disease persistence in pulmonary sarcoidosis. To investigate the functionality of TLR3

L412F in vitro in …

Cold Atmospheric Plasma Induces Atp-Dependent Endocytosis Of Nanoparticles And Synergistic U373mg Cancer Cell Death, Zhonglei He, Kangze Liu, Eline Manaloto, Alan Casey, George P. Cribaro, Hugh Byrne, Furong Tian, Carlos Barcia, Gillian Conway, Patrick Cullen, James Curtin

Articles

Gold nanoparticles (AuNP) have potential as both diagnostic and therapeutic vehicles. However, selective targeting and uptake in cancer cells remains challenging. Cold atmospheric plasma (CAP) can be combined with AuNP to achieve synergistic anti-cancer cytotoxicity. To explore synergistic mechanisms, we demonstrate both rate of AuNP uptake and total amount accumulated in U373MG Glioblastoma multiforme (GBM) cells are signifcantly increased when exposed to 75kV CAP generated by dielectric barrier discharge. No signifcant changes in the physical parameters of AuNP were caused by CAP but active transport mechanisms were stimulated in cells. Unlike many other biological efects of CAP, long-lived reactive species …

Interdisciplinary Teaching And Learning Within Molecular Gastronomy Education: Does It Benefit Students?, Roisin Burke, Pauline Danaher

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Since the creation of Molecular Gastronomy (MG) as a scientific discipline in 1988 a variety of higher education modules and programmes in that discipline have developed around the world. At the Technological University Dublin, MG has been taught using an interdisciplinary approach since the academic year 2012/2013. A Culinary Science lecturer and a Culinary Arts lecturer work in synergy and teach an interdisciplinary group of Food Science (FS) and Culinary Arts (CA) students. The students’ work is assessed, in each academic year, using summative methods i.e. written exam and a project assignment. In the academic year 2016/2017 the assignment reports …

In Vitro Label Free Screening Of Chemotherapeutic Drugs Using Raman Micro-Spectroscopy: Towards A New Paradigm Of Spectralomics., Zeineb Farhane, Haq Nawaz, Franck Bonnier, Hugh Byrne

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This overview groups some of the recent studies highlighting the potential application of Raman micro-spectroscopy as an analytical technique in preclinical development to predict drug mechanism of action and in clinical application as a companion diagnostic and in personalised therapy due to its capacity to predict cellular resistance and therefore to optimise chemotherapeutic treatment efficacy.

Notably, the anthracyclines, Doxorubicin and Actinomycin D, elicit similar spectroscopic signatures of subcellular interaction characteristic of the mode of action of intercalation. Although Cisplatin and Vincristine show markedly different signatures, at low exposure doses, their signatures at higher doses show marked similarities to those elicited …

Microencapsulated Ascorbic Acid: Development, Characterization, And Release Profile In Simulated Gastrointestinal Fluids, Michele Cristina Rodrigues Da Cruz, Camila Augusto Perussello, Maria Lúcia Masson

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The aim of this study was to produce ascorbic acid (AA) microcapsules by complex coacervation, characterize them, and evaluate the release profile in simulated gastrointestinal fluids. The microcapsules were made of gelatin and pectin at concentrations of 1.0, 2.0, and 3.0%. The coacervated microcapsules were assessed for morphology (by optical microscopy and scanning electron microscopy), water activity (Aw), hygroscopicity, solubility, encapsulation efficiency (EE), thermal behavior, and AA release profile. The AA microcapsules were characterized by low solubility, low hygroscopicity, high thermal stability, and low diameter (<10 μm), with EE ranging from 23.7 to 94.3%. The release profile was faster in gastric fluid (pH 1.8) than in intestinal fluid (pH 6.8). The sample containing 2.0% of wall material and 50% (w/w) of the simple emulsion (core) had the highest EE and the best in vitro release profile, with release of only 68% of AA in 120 min in the gastric fluid.

Practical applications Ascorbic acid (AA) is widely used in the food industry as an …

Carefree Masculinities In Ireland: Gender Conservatism And Neo-Liberalism, Niall Hanlon

Articles

No abstract provided.

A Conceptual Framework For Understanding The Biogeochemistry Of Dry Riverbeds Through The Lens Of Soil Science, Maria Isabel Arce, Clara Mendoza, Maria Almagro, Nuria Catalan, Anna M. Romani, Eugenia Marti, R. Gomez, Susana Bernal, Arnaud Foulquier, Michael Mutz, Rafael Marce, Annamaria Zoppini, Giulia Gionchetta, Gabriele Weigelhofer, R. Del Campo, Christopher T. Robinson, Alan Gilmer, Martin Rulik, Obrador Biel, Oleksandra Shumilova, Sanja Zlatanovic, Shai Arnon, Petr Baldrian, Gabriel Andreas Singer, Thibault Datry, Nikolaos Th Skoulikidis, Britta Tietjen, Daniel Von Schiller

Articles

Intermittent rivers and ephemeral streams (IRES) encompass fluvial ecosystems that eventually stop flowing and run dry at some point in space and time. During the dry phase, channels of IRES consist mainly of dry riverbeds (DRBs), prevalent yet widely unexplored ecotones between dry and wet phases that can strongly influence the biogeochemistry of fluvial networks. DRBs are often overlooked because they do not strictly belong to either domain of soil or freshwater science. Due to this dual character of DRBs, we suggest that concepts and knowledge from soil science can be used to expand the understanding of IRES biogeochemistry. Based …

Temporal Variability And Geographical Origins Of Airborne Pollen Grains Concentrations From 2015 To 2018 At Saclay, France, Roland Sarda Esteve, Dominique Baisnee, Benjamin Guinot, David O'Connor, Jean-Eudes Petit, John Sodeau, Jean-Pierre Besancenot, Michel Thibaudon, Valérie Gros

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The study of the origin and dispersion processes associated with airborne pollen grains are important to understand due to their impacts on health. In this context, a Hirst-type spore trap was utilized over the period 2015–2018 to monitor ambient pollen grains at Saclay, France, a receptor site influenced by both clean air masses originating from the Atlantic Ocean and polluted air masses under anticyclonic conditions. The objective of this work was to use ZeFir (a user-friendly, software tool recently-developed to investigate the geographical origin and point sources of atmospheric pollution) as a method to analyse total and allergenic airborne pollen …

Raman Spectroscopy Detects Biochemical Changes Due To Different Cell Culture Environments In Live Cells In Vitro, Mahmoud Gargotti, E. Efeoglu, Hugh Byrne, Alan Casey

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The in vitro cell culture environment can impact on cell biochemistry and cell cycle. The manifestation of such substrate-induced changes in cell cycle in the Raman microspectroscopic profiles of cell cultures is investigated at the level of nucleolus, nucleus and cytoplasm. HeLa immortalised human cervical cells and HaCaT dermal cells were cultured on three different substrates, conventional polystyrene cell culture dishes, CaF2 slides as a commonly used Raman substrate, and glass slides coated with collagen rat tail, as a mimic of the extra-cellular matrix (ECM) environment. A cell cycle study, based on percentage DNA content, as determined using propidium iodide …

Genome Sequences Of Four Cluster P Mycobacteriophages, Erin L. Doyle, Christy L. Fillman, Nathan S. Reyna, Ruth C. Plymale, Deborah M. Tobiason, Daniel E. Westholm, Jonathan L. Askins, Brittany P. Backus, Ashlynn C. Baker, Harrison S. Ballard, Paul J. Bisesi, Logan Bond, Deanna Byrnes, Hannah Carlstedt, Kinnon S. Dodson, Megan J. Fallert, Kyla J. Foster, Daniel N. Games, Tristan R. Grams, Nancy A. Guild, Autumn Hurd, Nicholas Iwata, Cassidy R. Kepler, Lucinda R. Krenzke, Kelly Luekens, Jackie Lewis, Cali Mcentee, Justin C. Mcgee, Noah Nalley, Jade Prochaska, Reid G. Rogers, Jessica B. Schipper, Kelsey Snyder

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Four bacteriophages infecting Mycobacterium smegmatis mc2155 (three belonging to subcluster P1 and one belonging to subcluster P2) were isolated from soil and sequenced. All four phages are similar in the left arm of their genomes, but the P2 phage differs in the right arm. All four genomes contain features of temperate phages.