scholarly journals Electrophoresis-Aided Biomimetic Mineralization System Using Graphene Oxide for Regeneration of Hydroxyapatite on Dentin

Materials ◽  
2021 ◽  
Vol 15 (1) ◽  
pp. 199
Author(s):  
Ingrid Patricia Khosalim ◽  
Yu Yuan Zhang ◽  
Cynthia Kar Yung Yiu ◽  
Hai Ming Wong
Keyword(s):  
Graphene Oxide ◽  
Control Group ◽  
Biomimetic Mineralization ◽  
Mineralization Process ◽  
Dentinal Tubules ◽  
Electrophoresis System ◽  
Uv Visible ◽  
Natural Hydroxyapatite ◽  
Experimental Group ◽  
Demineralized Dentin

Graphene oxide (GO) is an emerging luminescent carbon nanomaterial with the ability to foster hydroxyapatite (HA). A specially designed electrophoresis system can be used to accelerate the mineralization process. The aim of this study was to promote HA crystal growth on demineralized dentin using a GO incorporated electrophoresis system. GO was successfully synthesized by carbonization of citric acid and its presence was confirmed by Fourier transform infrared and UV-visible spectrophotometry evaluation. Dentin slices were placed in demineralized solution and divided into control (without the electrophoresis system) and experimental group. Demineralized dentin slices in the experimental group were remineralized using the electrophoresis system for 8 h/1.0 mA, with one subgroup treated without GO and the other with GO. Energy dispersive spectroscopy evaluation showed that the calcium/phosphate ratio of the crystal formed in control and experimental group with addition of GO was close to natural hydroxyapatite. However, scanning electron microscopy evaluation showed that the exposed dentinal tubules were occluded with rod-like crystals, which is similar to native enamel morphology, in the experimental group with addition of GO compared to the flake-like crystal in the control group. Mechanical evaluation revealed that the nanohardness and modulus of remineralized dentin were significantly higher in the experimental group. In conclusion, GO is a promising material to remineralize dentin and the introduction of an electrophoresis system can accelerate its process.

scholarly journals Study of Nano-Graphene Oxide Effects on the Number of Kupffer Cells and Megakaryocytes in Liver of NMRI Strain Mouse Embryo in Vivo

2015 ◽  
Vol 10 (Special-Issue1) ◽  
pp. 713-718 ◽  
Author(s):  
Mahsa Afzali ◽  
Kazem Parivar ◽  
Nasim Roodbari ◽  
Alireza Badiei
Keyword(s):  
Graphene Oxide ◽  
Kupffer Cells ◽  
Control Group ◽  
Destructive Effect ◽  
Group 2 ◽  
Nano Graphene ◽  
And Control ◽  
Experimental Group ◽  
Control Sham

To investigate the effects of nano-graphene oxide on the number of kupffer cells and megakaryocytes, in vivo method was applied. In this study, four groups of livers including control, sham, experimental group 1 (using a dose of 17 mg/kg), experimental group 2 (using a dose of 5.5 mg/kg), were investigated. On day 9 of gestation, control group without the effect of graphene oxide, sham group with injection of water as graphene oxide solvent and experimental groups with injection of graphene oxide (1.2 nm particles) with doses of 17 and 5.5 mg/kg mouse weight were examined. Then, on day 15 of gestation, embryos were removed from the mother`s body and their livers were amputated. The statistical results obtained by counting the number of kupffer cells and megakaryocytes in experimental groups that received nano graphene oxide, showed significant changes as compared with the sham and control groups. In the dose of 17 mg/kg there was a significant increase (P<0.001) in the number of kupffer cells and significant increase in the dose of 5.5 mg/kg (P<0.05) in the number of megakaryocytes. These findings showed the destructive effect of nano-graphene oxide on the development of liver in the condition of in vivo.

Morphometric analysis of peroxisomes in hepatocytes of alcohol-fed rats

1989 ◽  
Vol 47 ◽  
pp. 1100-1101
Author(s):  
D.C. Dominguez ◽  
J.T. Ellzey
Keyword(s):  
Caloric Intake ◽  
Volume Density ◽  
Controlled Study ◽  
Control Group ◽  
Numerical Density ◽  
Cacodylate Buffer ◽  
Paired Control ◽  
Experimental Group ◽  
Liver Peroxisomes ◽  
Single Lesion

Peroxisomes which participate in 1ipid metabolism have been shown to be altered in several metabolic disorders and toxic conditions. In alcoholic liver disease, the single lesion most frequently found is lipid accumu1ation in hepatocytes. However, the mechanisms for this 1ipid accumu1ation are not clear. The occurrence of modifications of liver peroxisomes due to excess alcohol consumption has not been subjected to a controlled study. We utilized a combination of cytochemica1 and morphometrictechniques to study the size and number of liver peroxisomes in rats fed an alcohol-supplemented diet compared to those of matched-paired control animals.Male Sprague-Daw1ey rats (400-500 g) received a liquid diet. The experimental group (N = 5/group) was fed a diet containing 30% ethanol-derived calories (EDC) and the control group was fed an isocaloric diet to 30% EDC. A pair feeding procedure was employed to control for caloric intake. Small pieces of liver randomly selected, were fixed in 2.3% -glutaraldehyde in 0.1 M sodium cacodylate buffer, pH 7.2, incubated in a DAB medium and postfixed with. 2% aqueous osmium tetroxide. EM photographs were taken from sections of 3 tissue blocks from each sample (7,200X) with a Zeiss EM10-A (60 kV). With the use of a point counting method and a digital planimeter the volume density (Vv) and numerical density (Nv) were determined.

Values and intergroup perceptions of East Germans and West Germans in 1998 1This research was supported by a grant from the German Research Society (We 1106/3-1).

1999 ◽  
Vol 58 (4) ◽  
pp. 263-272
Author(s):  
Jörg Doll ◽  
Michael Dick
Keyword(s):  
Research Society ◽  
Frame Of Reference ◽  
Control Group ◽  
Perceived Similarity ◽  
The West ◽  
Need For Uniqueness ◽  
German Research ◽  
East German ◽  
Experimental Group ◽  
East West

The studies reported here focus on similarities and dissimilarities between the terminal value hierarchies ( Rokeach, 1973 ) ascribed to different groups ( Schwartz & Struch, 1990 ). In Study 1, n = 65 East Germans and n = 110 West Germans mutually assess the respective ingroup and outgroup. In this intra-German comparison the West Germans, with a mean intraindividual correlation of rho = 0.609, perceive a significantly greater East-West similarity between the group-related value hierarchies than the East Germans, with a mean rho = 0.400. Study 2 gives East German subjects either a Swiss (n = 58) or Polish (n = 59) frame of reference in the comparison between the categories German and East German. Whereas the Swiss frame of reference should arouse a need for uniqueness, the Polish frame of reference should arouse a need for similarity. In accordance with expectations, the Swiss frame of reference significantly reduces the correlative similarity between German and East German from a mean rho = 0.703 in a control group (n = 59) to a mean rho = 0.518 in the experimental group. Contrary to expectations, the Polish frame of reference does not lead to an increase in perceived similarity (mean rho = 0.712).

Rorschach Characteristics in Adolescents with Systemic Lupus Erythematosus

2006 ◽  
Vol 28 (1) ◽  
pp. 100-118 ◽  
Author(s):  
J. Santoantonio ◽  
L. Yazigi ◽  
E. I. Sato
Keyword(s):  
Lupus Erythematosus ◽  
Case Control Study ◽  
Activity Index ◽  
Disease Activity Index ◽  
Female Adolescents ◽  
Control Group ◽  
Intelligence Scale ◽  
The Mean ◽  
Experimental Group ◽  
Control Study

The purpose of this study was to investigate the personality characteristics in adolescents with SLE. The research design is a case-control study by means of the Rorschach Method and the Wechsler Intelligence Scale. Study group: 30 female adolescents with lupus, 12–17 years of age. The SLE Disease Activity Index was administered during the period of psychological evaluation. Control group: 32 nonpatient adolescents were matched for age, sex, and socioeconomic level. In the Wechsler Intelligence Scale the mean IQ of the experimental group was significantly lower than that of the control group (77 and 98, respectively, p < .001). In the Rorschach, the lupus patients showed greater difficulty in interpersonal interactions, although they displayed the resources to process affect and to cope with stressful situations. A positive moderate correlation (p = .069) between the activity index of the disease and the affect constriction proportion of the Rorschach was observed: the higher the SLEDAI score, the lower the capacity to process affect. There is a negative correlation between the activity index of the disease and the IQ (p = .001): with a higher activity index of the disease, less intellectual resources are available.

In a Working Mood?

2008 ◽  
Vol 20 (1) ◽  
pp. 3-14 ◽  
Author(s):  
Leonard Reinecke ◽  
Sabine Trepte
Keyword(s):  
Cognitive Task ◽  
Prior Experience ◽  
Computer Game ◽  
Control Group ◽  
Mood Management ◽  
Management Processes ◽  
Quasi Experimental ◽  
Personal Media ◽  
Experimental Group ◽  
Subsequent Task

Abstract. This quasi-experimental study examined the effects of exposure to a computer game on arousal and subsequent task performance. After inducing a state of low arousal, participants were assigned to experimental or control conditions via self-selection. Members of the experimental group played a computer game for five minutes; subjects in the control group spent the same amount of time awaiting further instructions. Participants who were exposed to the computer game showed significantly higher levels of arousal and performed significantly better on a subsequent cognitive task. The pattern of results was not influenced by the participants' prior experience with the game. The findings indicate that mood-management processes associated with personal media use at the workplace go beyond the alteration of arousal and affect subsequent cognitive performance.

Impact of an educative program on dialysis patients’ knowledge and mental health: controlled before and after program

2018 ◽  
Vol 10 (2) ◽  
pp. 20204
Author(s):  
Laetitia Idier ◽  
Aurélie Untas ◽  
Nicole Rascle ◽  
Michèle Koleck ◽  
Maider Aguirrezabal ◽  
...  
Keyword(s):  
Mental Health ◽  
Depressive Symptoms ◽  
Vascular Access ◽  
Educational Program ◽  
Psychological State ◽  
Control Group ◽  
Dialysis Patients ◽  
Emotional Change ◽  
The Impact ◽  
Experimental Group

Introduction:Psychological impact of Therapeutic Patient Education (TPE) for dialysis patients is rarely evaluated since the focus of many studies is on medical variables (i.e., adherence).Objectives:The aims of this study were: 1) to estimate the impact of a TPE program on knowledge, depression and anxiety, 2) to examine change in knowledge as a mediator of the effects of a TPE program on mental health.Method:This study was conducted in three hemodialysis units and comprised two groups: an experimental group with education and a control group with routine care. The program was based of 5 educative sessions. Knowledge, depressive and anxious symptoms were assessed with self-reported outcomes measured before and 3 months after the program.Results:The sample comprised 125 patients. Knowledge about vascular access and nutrition (p < 0.01) and depressive symptoms increased in the experimental group (p < 0.01). Analysis of mediation showed that changes in knowledge about vascular access were a significant mediator of the effects of the program on depressive symptoms (F = 4.90;p = 0.01).Discussion:Knowledge acquired during an educational program could lead to an emotional change. Improving knowledge often leads to an awareness of the risks that can modify the psychological state of patients by reminding them of their vulnerability. This study shows that it is required to be attentive to the way of transmitting knowledge. It’s necessary adapting this transmission to the needs of patients and promoting the acquisition of psychosocial competence too.Conclusion:This study shows that knowledge acquired during an educational program can lead to an emotional change in the short term. A long-term follow-up of the population should be interesting to observe these emotional effects.

Соматические дисфункции у детей с задержкой речи

2017 ◽  
pp. 61-65
Author(s):  
E. L. Kuznetsova ◽  
L. A. Dultsev ◽  
E. V. Safin
Keyword(s):  
Standard Treatment ◽  
Control Group ◽  
Complex Therapy ◽  
Osteopathic Treatment ◽  
Positive Effect ◽  
Experimental Group

Goal of research - the study aims to examine the osteopathic profi le of children with dysarthria and to develop recommendations for osteopathic correction of somatic dysfunctions in 2-3 year old children presenting this pathology.Materials and methods. 30 2-3 year old children with the symptoms of dysarthria took part in the research. All the children were divided into 2 groups: the control group of 15 children received standard treatment, and the experimental group of 15 children received both standard and osteopathic treatment. The dysarthria severity and the osteopathic profi le were evaluated with account of the number of somatic dysfunctions at global, regional, and local levels.Results. The osteopathic correction was shown to have a positive effect on dysarthria severity. The study established a correlation between the dysarthria severity in children and the number of somatic dysfunctions at the local level.Conclusion. The study suggests using osteopathic correction of somatic dysfunctions in the complex therapy of dysarthria in children.

Influence of DAFS-25+polizon composition on blood and functional state of liver of steers at fattening

2020 ◽  
pp. 15-18
Author(s):  
Inna R. Kilmetova ◽  
◽  
Igor A. Rodin ◽  
Nazira I. Khayrullina ◽  
Nikolay G. Fenchenko ◽  
...  
Keyword(s):  
Functional State ◽  
White Blood Cells ◽  
Live Weight ◽  
The Body ◽  
Farm Animals ◽  
Control Group ◽  
Standard Diet ◽  
The Impact ◽  
Experimental Group ◽  
Stimulation Of

Summary. The disbalanced feeding and the uneven distribution of micro- and macroelements in the environment leads to a trace element, in particular hypomelanosis. To accelerate the growth and preservation of young farm animals include in the diet of various biological additives and drugs, which include selenium. For stimulation of weight gain in the livestock industry, as well as for the prevention and treatment of pathological processes in addition to micro - and macrouse amino acids, primarily methionine. The aim of this work was to study the influence of composition of DAFS-25+Polizon on morpho-biochemical parameters of blood and functional state of the liver in fattening bulls of black-motley breed in the conditions of the Republic of Bashkortostan. Experiments using were conducted on bull-calves of black-motley breed of the properties in the properties age from 6 to 15 months. The first experimental group during the experiment was additionally given the composition of DAFS-25+Polizon at a dose of 2 mg/kg, the animals of the control group received a standard diet. To assess the impact of the composition DAFS-25+Polizon on metabolism cattle studied morphological and biochemical indicators of blood and conducted histological examination of the liver. It is established that the use of the composition of DAFS-25+Polizon at a dose of 2 mg/kg increases the number of erythrocytes and hemoglobin in the experimental group and reduces the amount of white blood cells. The serum content of total protein, phosphorus and calcium increases in the group of experimental animals. Microscopic examination of the liver revealed no changes in the structure of the organ and hepatocytes in the experimental group, whereas in the control group hemodynamic disorders and dystrophic changes in liver cells were observed. Thus, the use of the composition DAFS-25+Polizon at a dose of 2 mg/kg of live weight in fattening bulls black-and-white breed contributes to the increase of redox processes in the body, stimulation of metabolism, prevent the development of liver disorders of cellular mechanisms of metabolism, optimizes the structure of the liver, which generally provides higher productivity.

Pragmatic instruction in L2-Russian

2020 ◽  
Vol 4 (1) ◽  
pp. 62-95
Author(s):  
Daniele Artoni ◽  
Valentina Benigni ◽  
Elena Nuzzo
Keyword(s):  
Foreign Language ◽  
Speech Acts ◽  
Control Group ◽  
Written Discourse ◽  
Instructional Treatment ◽  
Completion Task ◽  
Positive Effect ◽  
Experimental Group ◽  
National Corpus ◽  
Pragmatic Instruction

Over the last three decades, a growing number of studies have investigated the effects of instruction on the acquisition of pragmatic features in L2. The bulk of this research has focused mainly on the teaching of English as a second/foreign language. However, instructional pragmatic studies in L2-Russian are lacking. The main purpose of our study is to contribute towards filling this gap by analysing the effects of pragmatic instruction on the acquisition of two speech acts by Italian learners of Russian. Furthermore, we aim to explore whether the Multimodal Russian Corpus (MURCO), a multimedia subcorpus of the Russian National Corpus, can be an effective tool for teaching speech acts in L2-Russian. Our research was composed of one experimental group (n = 18) and one control group (n = 11); each was composed of two intact classes of Italian university students at an intermediate level of L2-Russian, who were pre- and post-tested using a written discourse completion task. The experimental group was subjected to a programme of pragmatic instruction – eight thirty-minute MURCO-based lessons devoted to requests and advice, while the control group was taught according to the standard syllabus, that is, with no pragmatic instruction. The results revealed that the use of the target pragmatic features varied significantly in the experimental group, but not in the control group, thus showing a general positive effect of the instructional treatment based on the MURCO corpus. However, some limitations were identified with regard to the usability of this tool by teachers and learners.

Brief psycho-education for caregivers of persons with first episode psychosis

2018 ◽  
Vol 9 (01) ◽  
Author(s):  
Praful Prabhuappa Kapse ◽  
Manisha Kiran
Keyword(s):  
First Episode Psychosis ◽  
First Episode ◽  
Control Group ◽  
Episode Psychosis ◽  
Study Results ◽  
Before And After ◽  
Quasi Experimental ◽  
Expressed Emotions ◽  
Experimental Group ◽  
Group Family

Caring for the persons with first episode psychosis is challenging and demanding. It may lead to the increased burden, expressed emotions among the caregivers. The numerous studies have shown that high burden and negative expressed emotions among caregivers can lead to early relapse in the patients with first episode psychosis. To evaluate the effects of the brief psychoeducation on the caregivers burden and expressed emotions. A quasi experimental - before and after with control group research design was adopted for the study. A total of 60 caregivers have participated in the study, of which 30 caregivers in experimental group and 30 caregivers in the control group. Family Burden Interview Schedule (Pai and Kapoor, 1981) and Attitude Questionnaire (Sethi et al., 1981) was used to assess caregiver's burden and expressed emotions. At end of the psychoeducation intervention, burden among caregivers and negative expressed emotions of the caregivers have significantly reduced. The positive expressed emotions have been increased. Study results demonstrates the importance of psychoeducation intervention in reducing the burden and negative expressed emotions.

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