86,675 research outputs found
The development of iron-free partially stabilized cement for use as dental root-end filling material
No full textNdong F, Sadhasivam S, Lin F-H, Savitha S, Wen-Hsi W, Lin C-P. The development of iron-free partially stabilized cement for use as dental root-end filling material. International Endodontic Journal, 45, 557564, 2012. Abstract Aim To determine the effect of increasing the proportion of zinc on partially stabilized cement (PSC) produced using a one-step sol gel process. Methodology A one-step sol-gel process of Portland cement-based PSC with Zn was synthesized by replacing iron nitrate. The crystalline phases of the PSC-Zn powder were analysed by using X-ray diffraction (XRD). The experimental groups [i.e. MTA, PSC-Fe (control), PSC with 1% Zn, PSC with 3% Zn, and PSC with 5% Zn] were immersed in simulated body fluid for 3 h, 1 and 3 days to evaluate the hydration product formation. The microstructure and surface morphology were analysed using scanning electron microscopy (SEM). Initial and final setting times of the materials were determined using an ASTM Vicat needle testing machine. To evaluate the cytotoxicity of PSC-Zn system, primary osteoblasts cell lines were used. Results The addition of increased weight percentages of Zn, resulted in a more unstable phase which favoured the formation of a monoclinic structure of C3S with an increased hydration reaction of PSC and reduced setting time. The cytotoxicity testing of PSC with Zn revealed that the material was not toxic. Conclusions The newly synthesized PSC-Zn material had short setting time and was biocompatible
Fattori che influenzano la qualità della carne in allevamento
No full textL'obiettivo scientifico principale della presente tesi di dottorato è stato quello di fornire nuove conoscenze per migliorare la qualità della carne. Sono stati condotti tre diversi studi.
Il primo studio aveva lo scopo di indagare l'effetto dell'aggiunta di un sottoprodotto, il panello di semi di canapa alla dieta delle vacche da latte Simmental italiane (IS) sulla qualità della carne. Ventisei vacche da latte sono state suddivise in tre gruppi alimentari: dieta a base di fieno, a base di insilati di mais e a base di pascolo. All'interno di ciascun gruppo, gli animali sono stati equamente suddivisi in due trattamenti a seconda della fonte proteica del concentrato: panello di semi di canapa (HEMP) o farina di soia (SB).
Le caratteristiche della carne, come il contenuto di estratto di etere e la forza di taglio Warner-Bratzler, erano simili tra i gruppi sperimentali (P > 0,05). Considerando la composizione degli acidi grassi (FA), l'HEMP ha mostrato un contenuto simile di FA saturi e polinsaturi (PUFA) (P>0,05) ma un contenuto inferiore di FA desiderabili (P<0,05) e un contenuto tendenzialmente inferiore di FA rapporto ipocolesterolemico/ipercolesterolemico (P <0,10) rispetto a SB. Il panello di semi di canapa può sostituire la soia nella dieta delle vacche da latte da riforma senza effetti sulla qualità della carne.
Il secondo studio si proponeva di studiare gli effetti del sesso sulle caratteristiche della carcassa, della carne e del lardo di suini di razza Mangalica allevati all'aperto. Nella sperimentazione sono stati utilizzati 15 soggetti, 10 castrati (C) e 5 femmine (F) con una carcassa media di 141,4 kg (137,0 kg F e 145,8 kg C).
Non è stato riscontrato un effetto del sesso, mentre sono state riscontrate differenze significative tra i due strati di lardo. In particolare, lo strato interno del lardo era più chiaro, più giallastro, con un contenuto inferiore di PUFA, sia totali che delle serie n-3 e n-6 (P < 0,05), e di più alto contenuto di FA saturi (SFA) (P < 0,05) rispetto allo strato esterno. In generale, i suini Mangalica presentavano uno spessore medio del grasso di 70 mm e un contenuto di colesterolo nella lonza di 0,674 mg/g. Il lardo ha mostrato un'elevata presenza di FA monoinsaturi (MUFA; 44,83% in media) e PUFA (15,65% in media).
Il terzo studio mirava a valutare gli effetti del sistema di allevamento (indoor vs. outdoor) e del sesso sulle caratteristiche della carne degli ibridi commerciali. Sono stati considerati 24 animali in un disegno sperimentale 2 (sesso) × 2 (sistema di allevamento). In particolare, sono stati presi in considerazione 10 maschi castrati (incroci Duroc italiano x Talent Topigs) e 14 femmine intere (incroci Landrace danese x Large White).
L'effetto del sesso ha limitato il contenuto di lipidi e PUFA della carne rispettivamente, ed era più alto nelle femmine rispetto ai maschi (P<0,05).
Al contrario, sistema di allevamento ha avuto un grande effetto sulle caratteristiche della carne e del lardo. La carne dei suini allevati all'aperto era più rossa (P<0,05) e più dura (P<0,05) rispetto a quella dei suini allevati all'interno. Il lardo dei suini all'aperto era più giallastro (P<0,05) rispetto a quello dei suini al chiuso. Inoltre, il contenuto di acidi grassi del lardo distingueva bene i due sistemi di allevamento considerati.
Tra i fattori considerati, il sesso (femmine vs. maschi castrati) ha avuto un effetto limitato, mentre il sistema di allevamento ha avuto una grande influenza sulla qualità della carne. Da un punto di vista più ampio per migliorare la qualità della carne, l'uso di sottoprodotti o di razze locali può essere una strategia adeguata.The main scientific aim of the present Doctoral Thesis was to provide new knowledge
for improving the quality of meat. Three different studies were performed.
The first study was aimed to investigate the effect of adding a by-product, hempseed
cake to the diet of Italian Simmental (IS) cull dairy cows on meat quality. Twenty-six cull
dairy cows were divided into three dietary groups: hay-based, corn silage-based and pasturebased diets. Within each group, the animals were equally divided into two treatments
according to the protein source of the concentrate: hempseed cake (HEMP) or soybeans meal
(SB). Meat characteristics, such as ether extract content and Warner–Bratzler shear force,
were also similar between experimental groups (P > 0.05). Considering fatty acids (FA)
composition, HEMP showed similar saturated FA and polyunsaturated (PUFA) content
(P>0.05) but lower desirable FA (P<0.05) content and a tendentially lower
hypocholesterolemic/hypercholesterolemic ratio (P < 0.10) than SB. Hempseed cake can
substitute soybean in the diet of cull dairy cows without effects on meat quality.
The second study was aimed to study the effects of sex on carcass, meat and lard
characteristics of Mangalica pigs reared in outdoors. Fifteen subjects were used in the trial, 10
castrated (C) and 5 females (F) with an average carcass 141.4 kg (137.0 kg F and 145.8 kg C).
An effect of sex was not found, conversely, significant differences were found for the
characteristics of the two layers of lard. In particular, the inner layer of lard was brighter,
more yellowish with lower PUFA content, both total and n-3 and n-6 (P < 0.05) series, and
higher saturated FA (SFA) content (P < 0.05) than outer layer. In general, Mangalitza pigs
presented an average fat thickness of 70 mm and a loin cholesterol content of 0.674 mg/g. The
lard showed a high presence of monounsaturated FA (MUFA; 44.83% on average) and PUFA
(15.65% on average).
The third study was aimed to assess the effects of farming system (indoor vs. outdoor)
and sex on meat and characteristics of commercial hybrids. Twenty-four animals were
considered in a 2 (sex) × 2 (farming system) factorial design. In particular, 10 castrated males
(Italian Duroc x Talent Topigs crosses) and 14 entire females (Danish Landrace x Large
White crosses) were taken into account. The effect of sex was limited to lipid and PUFA
content of meat, respectively lower and higher in female than in male (P<0.05). Conversely,
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farming system had a great effect on meat and lard characteristics. The meat from outdoors
pigs was redder (P<0.05) and harder (P<0.05) than that of indoors pigs. The lard of outdoors
pigs was more yellowish P<0.05) than indoors pigs. In addition, the fatty acids content of the
lard well distinguished the two farming systems considered.
Among the factors considered, sex (females vs. castrated males) had little effect, while
farming system had a large influence on meat quality. From a wider point of view of
enhancing the quality of meat, the use of by-products or local breeds can be suitable
strategies
Variations on the Author
Full text link“Variations on the Author” discusses two of Eduardo Coutinho’s recent films (Um Dia na Vida, from 2010, and Últimas Conversas, posthumously released in 2015) and their contribution to the general question of documentary authorship. The director’s filmography is characterized by a consistent yet self-effacing form of authorial self-inscription: Coutinho often features as an interviewer that rather than express opinions propels discourses; an interviewer that is good at listening. This mode of self-inscription characterizes him as an author who is not expressive but who is nonetheless markedly present on the screen. In Um Dia na Vida, however, Coutinho is completely absent form the image, while Últimas Conversas, on the contrary, includes a confessional prologue that moves the director from the margins to the center of his films. This article examines the ways in which these works stand out in the filmography of a director who offers new insights into the notion of cinematic authorship
[Newspaper Clipping: Author Claims Evidence of Second JFK Assassin #1]
No full textNewspaper article titled "Author Claims Evidence of Second JFK Assassin." The article states that author Richard J. Whalen concluded "that there is circumstantial evidence to support the theory of a second assassin in the shooting of President John F. Kennedy.
Also By The Same Author: AKTiveAuthor, a Citation Graph Approach to Name Disambiguation
No full textThe desire for definitive data and the semantic web drive for inference over heterogeneous data sources requires co-reference resolution to be performed on those data. In particular, name disambiguation is required to allow accurate publication lists, citation counts and impact measures to be determined. This paper describes a graph-based approach to author disambiguation on large-scale citation networks. Using self-citation, co-authorship and document source analyses, AKTiveAuthor clusters papers, achieving precision of 0.997 and recall of 0.818 over a test group of eight surname clusters
John F. Kennedy telegram to Roosevelt
No full textJersey Homesteads (later the Borough of Roosevelt) was established in the 1930s as an agro-industrial cooperative community. It was established specifically for urban Jewish garment workers, many of whom had emigrated from Europe. President John F. Kennedy sent a telegram to the citizens of Roosevelt, New Jersey, apologizing for not being able to attend the memorial dedication in honor of former President Franklin Delano Roosevelt. (Jersey Homesteads became Roosevelt in 1945 in honor of the president.) President Kennedy expressed his gratitude to the people of Roosevelt for constructing the memorial, and commented that it will serve as a constant reminder of Roosevelt's good works
Logarithmic variance profiles and the corresponding f-1 spectra of temperature fluctuations in turbulent Rayleigh-Bénard convection
No full textWe report experimental results for the temperature variance 2(z) and the corresponding frequency spectra P(f) in turbulent Rayleigh-Bénard convection (RBC) in a cylindrical sample of aspect ratioT= D/L = 1:00 (D = 1:12 m is the diameter and L = 1:12 m the height). The measurements were conducted in the Rayleigh-number range 1011 < Ra < 1:35 1014 and Pr ' 0:8. For Ra = 1:35x1014, 2(z) could be described well by a logarithmic dependence on the vertical position z in a range of z 1 < z < z 2 with z 1 ' 70 and z 2 = 0:1L. Here L=(2Nu) is the thickness of a thin thermal sublayer adjacent to the horizontal plate where the heat flux (denoted by the Nusselt number Nu) is carried mostly by thermal diffusion. In the log layer, we found that the temperature spectra had a significant frequency range over which P(f) f with close to 1. As Ra decreased, increased so that the log layer became thinner. At Ra = 2:05 1011, z 2 < z 1 and therefore there was no range for a log layer. Correspondingly, the temperature spectrum near the horizontal plate did not have the f1 scaling form either
Maine author Franklin F. Gould recalls his first glimpse of the outside world
No full textMaine author Franklin F. Gould recalls his first glimpse of the outside world as he relates how, as a young farm boy in the late 1800\u27s, he drove his father\u27s horses on an errand to an icebound river
Mapping the Discipline of the Olympic Games An Author-Cocitation Analysis
Full text linkThe authors conducted an author cocitation analysis on prominent authors writing about the Olympics during the 1990s. Author cocitation is an established bibliometric technique that can be used to measure the relative similarities of topics written about by the cited authors. This enables a visual representation of the “intellectual space” of the discipline, in this case the Olympics, to be created for the period under review. So core and peripheral research areas are identified, along with their major contributors. The representation appears as a two-dimensional cluster-enhanced map. Subject expertise was then applied to the results to place labels on the generated clusters of authors and their topics
Trends in malaria admissions at the Mbakong Health Centre of the North West Region of Cameroon: a retrospective study
Full text linkBackground: Malaria is the leading cause of death worldwide. It is urgent to assess the impact of interventions and
scaled-up control efforts. Despite reported reduction in malaria prevalence in Africa, the trends in Cameroon are
not yet fully understood. The aim of this study was to investigate the trends in malaria admissions among febrile
patients seeking treatment over a seven-year period (2006–2012) in an endemic area in Cameroon, hypothesizing a
declining trend. This period followed changes in malaria treatment policy. The objectives were to identify possible
trends in malaria admissions and to evaluate the impact of changes to treatment guidelines on the prevalence.
Methods: Data was collected through consultation and perusal of laboratory and prescription registers of the
Mbakong Health Centre. Data analysis was conducted using SPSS and SAS Statistics.
Results: Analysis revealed that 4,230 febrile patients were received from 2006–2012. Of these febrile cases, 29.30%
were confirmed positive. Between 2006 and 2012 confirmed malaria positive cases of those tested fluctuated,
dropping from 53.21% in 2006 to 17.20% in 2008; then rising to 35.00% in 2011 and, finally, dropping to 18.2% of
those tested in 2012. The prevalence in females and males across all age groups were similar: a slightly higher risk
of males to have malaria (OR = 1.08, 95% CI 0.94-1.25) were not practically significant. Of those tested, the 5 to < 15 years
and the 1 to<5 years age groups were the hardest hit by malaria in the area. A practically visible and significant
association was observed between the age and gender with regards to the number of malaria positive results
(Pearson ×2 = 153.675, p < 0.00001, Cramer’s V = 0.352). Malaria prevalence exhibited a fluctuating yet declining
trend, as observed over the 28 quarters between January, 2006 and December, 2012.
Conclusions: The changes to the treatment guidelines appear to result in a declining trend as was observed
between 2006 and 2008. However, malaria admissions fluctuated between 2008 and 2012. There is, therefore, a
need to step up control efforts of especially the vulnerable groups, such as the very youngDST/NWU Preclinical Drug Development Platform of
the North-West University, the Division of Research, Catholic University of
Cameroon Bamenda, the Research Office of the North-West University,
Potchefstroom, South Africa, the Laboratory of Public Health Research
Biotechnologies and the Njongdong Foundatio
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