1,491 research outputs found

    PANASONIC LZ5 Digital Cameras Simulator and Trainer

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    Práca Simulátor a trenažér digitálneho fotoaparátu Panasonic LZ5 sa zaoberá návrhom a tvorbou funkčného modelu fotoaparátu. Úvod zahŕňa výber programovacieho jazyka a návrh riešenia daného problému. Práca pokračuje stručným náhľadom do programovacieho jazyka Macromedia Flash MX 2004 a implementáciou jednotlivých funkcií. Ďalej je v práci popísané ovládanie a vzhľad simulátora digitálneho fotoaparátu. V závere sú spomenuté klady a zápory daného programu a samotný prínos projektu.Thesis "Simulator and Trainer of the digital camera Panasonic LZ5" deals with a design and a creation of the function model of the camera. Introduction includes a choice of programming language and problem solving suggestions. The work continues with a brief overview of the programming language Macromedia Flash MX 2004 and an implementation of its single functions. It describes controls and an appearance of the simulator of the digital camera. Closing part provides information about the benefits and the negatives of the application and a contribution of the whole project.

    Academic Resources and Opportunities

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    This PowerPoint encompasses the lesson that I executed in COR 101 on academic opportunities and resources. I also provided a reflection on my experience with lesson planning and teaching a class on my own!https://digitalcommons.cortland.edu/corslides/1014/thumbnail.jp

    Polymerization Efficiency of Glass-Ionomer and Resin Adhesives under Molar Bands

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    Objective: To determine the degree of cure of a light-cured resin-modified glass ionomer (RMGI) under molar bands compared with a light-cured resin and a dual-cured resin. Materials and Methods: The 3 cements used were Fuji Ortho LC, Eagle Spectrum resin, and Variolink II dual-cure. Each sample was indirectly light cured for 20 seconds (10 seconds occlusally, 10 seconds cervically) under sections of molar bands, and the degree of cure was evaluated with micro-MIR FTIR spectroscopy. Results: The RMGI exhibited a significantly higher mean degree of cure (55.31%) than both of the resins (Eagle 19.23%; Variolink II, 25.42%), which did not differ significantly at α = .05 level of significance. Conclusion: Higher degree of conversion can be obtained from RMGIs under molar bands compared with composite resin adhesives provided the proper curing technique is used

    The Effect of Alkylresorcinol on Lipid Metabolism in Azotobacter chroococcum

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    We studied the effect of exogenous alkylresorcinols on the lipid metabolism of Azotobacter chroococcum. We observed that when 5-n-pentadecylresorcinol was present in the growth medium, the more endogenous alkylresorcinols were synthesized. Concurrently, a drop in the amount of phospholipids was observed. These changes were associated with increasing numbers of dormant cysts, while the number of vegetative cells diminished. The chemical nature of the alkylresorcinols synthesized by Azotobacter chroococcum was dependent on the duration of exposure of the bacteria to exogenous alkylresorcinols. When the exposure time was prolonged to four days, 5-n-nonadecylresorcinol (C 19:0) was substituted by 5-nheneicosylresorcinol (C 21:0) and 5-n-tricosylresorcinol (C 23:0). Two fluorescent membrane probes, NBD-PE and TMA-DPH, further revealed that the presence of alkylresorcinols in the lipid bilayer restrains the phospholipid rotational motion

    Elevated cystatin-C concentration is associated with progression to prediabetes: the Western New York Study

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    OBJECTIVE – We conducted a nested case-control investigation to examine if elevated baseline concentrations of cystatin-C predicted progression from normoglycaemia to prediabetes over 6 years of follow-up from the Western New York Health Study. RESEARCH DESIGN AND METHODS – 1,455 participants from the Western New York Health Study, free of type 2 diabetes and known cardiovascular disease at baseline (1996-2001), were reexamined in 2002-2004. An incident case of prediabetes was defined as one with fasting glucose below 100 mg/dl at the baseline examination and ≥ 100 mg/dl and ≤ 125 mg/dl at the follow-up examination. All cases (n=91) were matched 1:3 to control participants based upon sex, race/ethnicity and year of study enrollment. All controls had fasting glucose levels < 100 mg/dl at both baseline and follow-up examinations. Cystatin-C concentrations and the urinary albumin to creatinine ratio were measured from frozen (-196 Cº) baseline blood and urine samples. Serum creatinine concentrations were available from the baseline examination. RESULTS –Multivariate conditional logistic regression analyses adjusted for age, baseline glucose level, HOMA-IR, body mass index, hypertension, eGFR, cigarette smoking, and alcohol use revealed a significantly increased risk of progression to prediabetes among those with elevated baseline concentrations of cystatin-C (Odds Ratio, 95% CI: 3.04, 1.34, 6.89) (upper quintile vs. the remainder). Results of secondary analyses that considered hs-CRP, IL-6, E-selectin, or sICAM did not alter these results. CONCLUSIONS - These results suggest that early renal impairment indexed with cystatin-C imparted a three-fold excess risk of progression to prediabetes in this study population. Recent evidence from randomized clinical trials (1,2) among people with prediabetes have provided convincing evidence that early intervention can significantly delay or prevent the progression to type 2 diabetes. The identification of those with prediabetes is assuming greater importance (3) especially in light of the fact that approximately 35 million adults aged 40-74 years old in the United States have prediabetes defined as impaired fasting glucose (4). Microalbuminuria occurs frequently in nondiabetic subjects and places them at increased risk for cardiovascular disease (5-7). The mechanisms behind this observation are poorly understood, however. Albuminuria may reflect underlying vascular damage (8), hypertension (9, 10) endothelial dysfunction (11, 12) and/or low-grade inflammation (13). A large percentage of type 2 individuals pass through a period of prediabetes (14) and may experience early renal dysfunction e.g., a glomerular filtration rate (GFR) above 60 ml/minute per 1.73m2. Currently used estimating equations are poor at identifying early renal impairment and better indices are of great interest (15, 16). Recently, several studies have suggested that cystatin-C levels may be a more sensitive marker of early renal impairment than either albuminuria or serum creatinine concentration (17-20). Therefore, a better understanding of a putative role for cystatin-C in the etiology of prediabetes could shed light on the renal/heart disease connection (21). Given the reported superiority of cystatin C over conventional measures of renal function, we hypothesized that cystatin-C would predict progression to prediabetes independent of serum creatinine or estimated GFR. We also investigated the role of intervening mechanisms including hypertension, insulin resistance, endothelial dysfunction and inflammation

    Stimuli-responsive electrospun fibers and their applications

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    Stimuli-responsive electrospun nanofibers are gaining considerable attention as highly versatile tools which offer great potential in the biomedical field. In this critical review, an overview is given on recent advances made in the development and application of stimuli-responsive fibers. The specific features of these electrospun fibers are highlighted and discussed in view of the properties required for the diverse applications. Furthermore, several novel biomedical applications are discussed and the respective advantages and shortcomings inherent to stimuli-responsive electrospun fibers are addressed (136 references)

    Role of clathrin- and caveolae-mediated endocytosis in gene transfer mediated by lipo- and polyplexes

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    Abstract We investigated the effects of inhibitors of clathrin-mediated endocytosis (chlorpromazine and K + depletion) and of caveolae-mediated uptake (filipin and genistein) on internalization of FITC–poly-l-lysine-labeled DOTAP/DNA lipoplexes and PEI/DNA polyplexes by A549 pneumocytes and HeLa cells and on the transfection efficiencies of these complexes with the luciferase gene. Uptake of the complexes was assayed by fluorescence-activated cell sorting. Lipoplex internalization was inhibited by chlorpromazine and K + depletion but unaffected by filipin and genistein. In contrast, polyplex internalization was inhibited by all four inhibitors. We conclude that lipoplex uptake proceeds only by clathrin-mediated endocytosis, while polyplexes are taken up by two mechanisms, one involving caveolae and the other clathrin-coated pits. Transfection by lipoplexes was entirely abolished by blocking clathrin-mediated endocytosis, whereas inhibition of the caveolae pathway had no effect. By contrast, transfection mediated by polyplexes was completely blocked by genistein and filipin but was unaffected by inhibitors of clathrin-mediated endocytosis. Fluorescence colocalization studies with a lysosomal marker, AlexaFluor–dextran, revealed that polyplexes taken up by clathrin-mediated endocytosis are targeted to the lysosomal compartment for degradation, while the polyplexes internalized via caveolae escape this compartment, permitting efficient transfection
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