Experimental Studies on Short and Long Term Behaviour for Composite Steel-Concrete Slabs

2012 ◽  
Author(s):  
O. Mirza ◽  
B. Uy
Keyword(s):  
Experimental Studies ◽  
Concrete Slabs ◽  
Short And Long Term ◽  
Composite Steel

Advertising in disguise? How disclosure and content features influence the effects of native advertising

2020 ◽  
Vol 45 (3) ◽  
pp. 303-324
Author(s):  
Johannes Beckert ◽  
Thomas Koch ◽  
Benno Viererbl ◽  
Nora Denner ◽  
Christina Peter
Keyword(s):  
Experimental Studies ◽  
Brand Attitudes ◽  
News Websites ◽  
Short And Long Term ◽  
Message Sidedness ◽  
Over Time

AbstractNative advertising has recently become a prominent buzzword for advertisers and publishers alike. It describes advertising formats which closely adapt their form and style to the editorial environment they appear in, intending to hide the commercial character of these ads. In two experimental studies, we test how advertising disclosures in native ads on news websites affect recipients’ attitudes towards a promoted brand in a short and long-term perspective. In addition, we explore persuasion through certain content features (i. e., message sidedness and use of exemplars) and how they affect disclosure effects. Results show that disclosures increase perceived persuasive intent but do not necessarily decrease brand attitudes. However, disclosure effects do not persist over time and remain unaffected by content features.

Effects of short- and long-term treatments of sardine (Sardina pilchardus) protein hydrolysates on blood lipid concentrations and antioxidant status, in rats fed cholesterol-enriched diets

2022 ◽  
Vol 11 (6) ◽  
pp. 733-745
Author(s):  
Nora Athmani ◽  
Allaoui Amine ◽  
Nasri Moncef ◽  
Boualga Ahmed
Keyword(s):  
Experimental Studies ◽  
Blood Lipid ◽  
Protein Hydrolysates ◽  
High Cholesterol ◽  
Short Term ◽  
Hypercholesterolemic Diet ◽  
Short And Long Term ◽  
Antioxidant Enzymes Activities ◽  
Radical Attack

Hypercholesterolemia is a major risk factor of cardiovascular diseases (CVD). A limited number of experimental studies have shown that sardine protein hydrolysates (SPH) could be a very useful natural compound to prevent hy-percholesterolemia by both improving the lipoprotein profile and modula-ting oxidative stress. In the present study, the effect of short and long term treatments with SPH were examined on serum lipid contents, lipid peroxida-tion and antioxidant enzymes activities in rats fed cholesterol-enriched diet. At day 0, rats were divided into five groups. The group of day 0 was the stan-dard group, and the four remaining groups were divided into two parts of two groups each consuming for 14 or 28 days an hypercholesterolemic diet, and treated (HC-SPH) or not (HC) by gavage with SPH. Compared with day 0, serum TC contents were increased at day 14 and remained unchanged at day 28 in HC-SPH group. These values were decreased in HC-SPH versus HC. Liver and heart TBARS concentrations were increased at day 14 then diminished at day 28 in HC-SPH group. Liver and heart SOD and CAT activities were decrea-sed at short term then remained unchanged at long term in HC-SPH group. In addition, these activities were enhanced in HC-SPH versus HC. In conclusion, these results indicate the potential effects of short and long term treatments of SPH to improved cholesterolemia and reduced radical attack in rats fed high-cholesterol diets.

scholarly journals Prolonged, 24-h Delayed Peripheral Inflammation Increases Short- and Long-Term Functional Impairment and Histopathological Damage after Focal Ischemia in the Rat

2010 ◽  
Vol 30 (8) ◽  
pp. 1450-1459 ◽  
Author(s):  
Kristopher D Langdon ◽  
Crystal L MacLellan ◽  
Dale Corbett
Keyword(s):  
Systemic Inflammation ◽  
Clinical Data ◽  
Experimental Studies ◽  
Artery Occlusion ◽  
Febrile Response ◽  
Behavioral Assessments ◽  
Short And Long Term ◽  
Systemic Infections ◽  
Cerebral Artery Occlusion

The incidence of infection among stroke patients is alarmingly high and both acute and delayed infections increase morbidity and mortality. Experimental studies support the acute clinical data, but little attention has focused on delayed systemic infections. Here, we investigated the effects of prolonged systemic inflammation either before or 24-h after ischemia. Systemic inflammation was induced by injecting rats with three separate doses of lipopolysaccharide (LPS; 50 μg/kg, i.p.) with core temperature monitoring for 48-h after middle cerebral artery occlusion (MCAo). Lipopolysaccharide injected before MCAo increased injury by ∼30%, whereas delayed injection increased injury by ∼85% (30-day survival). Proinflammatory cytokines assessed repeatedly for 72 h were significantly and persistently elevated with inflammation. This was accompanied by increases in microglia/macrophage and infiltrating leukocyte numbers in delayed LPS-treated animals. Behavioral assessments at 7 and 30 days revealed ∼15% deficit in hindlimb function in animals treated with LPS 24-h after ischemia. Clearly, delayed and prolonged postischemic systemic inflammation has devastating effects on stroke outcome, in the absence of a prolonged febrile response. These findings, together with corroborative clinical data, emphasize the importance of early intervention to counteract the deleterious consequences of stroke-associated inflammation and infection.

scholarly journals Interventions in Foster Family Care: A Systematic Review

2019 ◽  
Vol 30 (1) ◽  
pp. 3-18 ◽  
Author(s):  
Martin Bergström ◽  
Marianne Cederblad ◽  
Kickan Håkansson ◽  
Ann Kristine Jonsson ◽  
Christian Munthe ◽  
...  
Keyword(s):  
Systematic Review ◽  
Experimental Studies ◽  
Family Care ◽  
Foster Family ◽  
Parent Selection ◽  
Quasi Experimental ◽  
Comprehensive Search ◽  
Short And Long Term

Objective: Foster family care is associated with adverse short- and long-term consequences for the child. A systematic review was conducted on interventions for foster children and foster careers. Method: A comprehensive search process was used to find eligible interventions evaluated in randomized controlled trials or quasi-experimental studies. The quality of studies was assessed with GRADE, and effects were synthesized using meta-analytic methods. Results: In all, 28 publications of 18 interventions, including 5,357 children, were identified. Only three specific interventions had sufficient confidence of evidence. No study had examined tools for foster parent selection nor had evaluated preservice programs related to outcomes. Discussion: These analyses provide new insights and hope into the field of systematic interventions in foster care. The overall results indicate that it is possible to improve eight outcomes but cannot point out which programs are superior. Ethically, social care organizations should systematically collect knowledge about effects and side effects.

Deformation of Steel-Reinforced Concrete Round Thin Slabs Taking into Account the Compliance of the Support Contour

2021 ◽  
Vol 887 ◽  
pp. 680-690
Author(s):  
Kh.S. Razzokov
Keyword(s):  
Reinforced Concrete ◽  
Stress State ◽  
Strain State ◽  
Experimental Studies ◽  
Concrete Slabs ◽  
Governing Equations ◽  
Short Term ◽  
Steel Reinforced Concrete ◽  
Normalized Parameters

The paper presents the governing equations of bending of nonlinearly deformable, axisymmetrically loaded round, thin reinforced concrete and steel concrete slabs, taking into account the work of a non-deformable and pliable support contour. Based on the results of theoretical and experimental studies, the stress-strain state of reinforced concrete and steel-concrete slabs under short-term and long-term loadings was estimated. The nature of stress state is revealed in the stages of cracking and destruction of plates. The work of the slabs in the field of elastic, elastoplastic and plastic stages of work is estimated. Using the method of limiting equilibrium, a method for calculating steel-concrete slabs for strength with normalized parameters.

scholarly journals Effect of Ultraviolet Irradiation on Osseointegration of Dental Implants: A Comparative Histomorphometric Study in Canine Models

2020 ◽  
Vol 10 (12) ◽  
pp. 4216
Author(s):  
Chunui Lee ◽  
Seung-Mi Jeong ◽  
Hyun-Woo Yang ◽  
Byung-Ho Choi
Keyword(s):  
Dental Implants ◽  
Uv Irradiation ◽  
Experimental Studies ◽  
Canine Model ◽  
The Other ◽  
Implant Stability ◽  
Histomorphometric Study ◽  
Canine Models ◽  
Short And Long Term

Recent studies have focused on achieving sound osseointegration applying methods of surface reprocessing of dental implants using ultraviolet (UV) irradiation. However, there have been few reports on the effect of UV irradiation on osseointegration in both the short and long term, and experimental studies using the canine model do not exist. Therefore, the aim of this study was to determine the short- and long-term degree of osseointegration of dental implants according to UV irradiation using a histometric analysis in canine models. Four beagles were used for this study and 24 dental implants were placed. Six implants were inserted with flapless protocols in each mandible. Half of the implants were UV-irradiated prior to implantation. UV-treated and untreated implants were placed one after the other; implant stability was recorded using the implant stability test (IST) immediately after implantation and every seven days thereafter. Two of the beagles were sacrificed after four weeks and the other two after 12 weeks. The implants were removed in block sections and were evaluated histomorphologically and statistically. As a result, we found no statistically significant differences in the mean IST values and in bone-to-implant contact (BIC) in all groups at 4 and 12 weeks.

Hymenolepis diminuta: Experimental studies on the antioxidant system with short and long term infection periods in the rats

2011 ◽  
Vol 129 (2) ◽  
pp. 158-163 ◽  
Author(s):  
Michał Skrzycki ◽  
Monika Majewska ◽  
Małgorzata Podsiad ◽  
Hanna Czeczot ◽  
Rusłan Salamatin ◽  
...  
Keyword(s):  
Antioxidant System ◽  
Experimental Studies ◽  
Hymenolepis Diminuta ◽  
Short And Long Term

scholarly journals Shrinkage-Induced Response of Composite Steel–Concrete Slabs: A State-of-the-Art Review

2021 ◽  
Vol 12 (1) ◽  
pp. 223
Author(s):  
Md Mahfuzur Rahman ◽  
Gianluca Ranzi
Keyword(s):  
State Of The Art ◽  
Concrete Slab ◽  
Limit State ◽  
Time Dependent ◽  
Concrete Slabs ◽  
Induced Response ◽  
Composite Slabs ◽  
Long Term Behavior ◽  
Composite Steel

Composite steel–concrete slab is a floor typology widely used for building applications. Their design is usually governed by serviceability limit state requirements associated with the time-dependent response of the concrete. In this context, this paper presents a state-of-the-art review of research carried out to date on the long-term behavior of composite steel–concrete slabs. The particularity of this time-dependent response relies on the fact that the concrete cannot dry from the underside of the slab due to the presence of the profiled sheeting while it can dry from its upper surface. In the first part of the paper, a review of the work carried out on the identification of the time-dependent response of the concrete is presented by considering the peculiarities that occur due to the non-symmetric drying condition related to composite slabs. Particular attention is given to shrinkage effects and to the occurrence and influence of the non-uniform shrinkage gradient that develops in this form of construction over time. This is followed by the description and discussion of the experimental work performed on both simply-supported and continuous static configurations of composite slabs. In particular, the work published to date is summarized while highlighting the key parameters of the test samples and of the testing protocols adopted in the experiments. In the last part of the paper, available theoretical and design models proposed for the predictions of the shrinkage-induced behavior of composite slabs are presented and discussed.

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