scholarly journals Sensitivity of composite materials to ambient light and clinical working time

2012 ◽  
Vol 59 (4) ◽  
pp. 190-197
Author(s):  
Vesna Miletic ◽  
Tatjana Savic-Stankovic ◽  
Jovana Stasic
Keyword(s):  
Composite Materials ◽  
Hybrid Composites ◽  
Working Time ◽  
Lower Sensitivity ◽  
Ambient Light ◽  
Mean Values ◽  
Significance Level ◽  
Significant Difference ◽  
Before And After ◽  
The Difference

Introduction. The aim of this study was to determine sensitivity of composite materials to ambient light by a modified standard ISO 4049:2000 and clinical working time. Materials and Methods. The following materials were tested: nano-hybrid Herculite XRV Ultra (Kerr), micro-hybrid Herculite XRV (Kerr), Zmack (Zhermack), SuperCor (SpofaDental) and Valux Plus (3M ESPE). Five samples in each group were exposed to ambient light of 8000 lx, which comprised dental unit light and natural light. After 60 sec of exposure, each sample was visually examined for signs of inhomogeneity meaning that material did not pass the test. Clinical working time was studied by applying a custom-built, standardized indenter into composite specimens of about 2 mm thickness during the same exposure to ambient light. Completion of polymerization was tested by dissolving samples in ethanol and measuring the difference in thickness before and after the test. Results were statistically analyzed using ANOVA at the significance level of 0.05. Results. Only Herculite XRV Ultra passed the test of sensitivity to ambient light, while other materials showed signs of inhomogeneity. Herculite XRV Ultra showed significantly longer working time than other composites, the average was 250 sec (p<0.05). The mean values of working time for other materials ranged between 117-131 sec and there was no significant difference between them (p>0.05). Conclusion. Due to the lower sensitivity to ambient light and significantly longer clinical working time compared to micro-hybrid composites, Herculite XRV Ultra can be recommended for clinical procedures that require prolonged working time with material in plastic condition.

scholarly journals Influence of Apical Patency and Cleaning of the Apical Foramen on Periapical Extrusion in Retreatment

2013 ◽  
Vol 24 (5) ◽  
pp. 482-486 ◽  
Author(s):  
Marili Doro Andrade Deonizio ◽  
Gilson Blitzkow Sydney ◽  
Antonio Batista ◽  
Roberto Pontarolo ◽  
Paulo Ricardo Bittencourt Guimarães ◽  
...  
Keyword(s):  
Material Removal ◽  
Filling Material ◽  
Mean Values ◽  
Filtration System ◽  
Root Canal Retreatment ◽  
Significant Difference ◽  
Before And After ◽  
The Mean ◽  
The Difference ◽  
Removal Technique

This study evaluated the influence of apical patency, root filling removal technique and cleaning of the apical foramen, concerning the amount of debris extruded during root canal retreatment. Forty mandibular incisors were randomly assigned to 4 groups - GIM (n=10), GIIM (n=10), GIPT (n=10) and GIIPT (n=10), which were named according to leaving (I) or not (II) apical patency during canal preparation and filling removal technique (manual - M or ProTaper system - PT). After filling material removal, each specimen of each group had the apical foramen cleaned by sizes 15, 20 and 25 instruments, generating 12 subgroups: GIM15, GIM20, GIM25, GIIM15, GIIM20, GIIM25, GIPT15, GIPT20, GIPT25, GIIPT15, GIIPT20 and GIIPT25. Extruded filling debris was collected by a Milipore filtration system, an HV-durapore, 0.45 µm pore filter with a 25 mm diameter. The filters were weighed before and after the collection on an analytical scale (10–5 g), and the difference was calculated. The mean weight of extruded filling debris was analyzed statistically by Kruskal-Wallis and Friedman ANOVA tests (α=0.05). The mean values found in the groups (in mg) were: GIM (0.95±0.94), GIIM (0.47±0.62), GIPT (0.30±0.31) and GIIPT (0.32±0.44). There was no statistically significant difference among any of the groups or subgroups (p>0.05). ProTaper provided the smallest amount of extruded filling material, regardless of presence or absence of apical patency, followed by manual technique, without and with apical patency. Additional amounts of debris were collected during cleaning of the apical foramen, regardless of the instrument, presence/absence of patency or root filling removal technique.

scholarly journals The Effect of Selected Corrective Exercises With Physioball on the Posture of Female Computer Users With Upper Crossed Syndrome

2019 ◽  
Vol 5 (2) ◽  
pp. 112-123
Author(s):  
Fariba Javazi ◽  
◽  
Parisa Sedaghati ◽  
Hasan Daneshmandi ◽  
◽  
...  
Keyword(s):  
Exercise Program ◽  
Exercise Group ◽  
Computer Users ◽  
Mean Values ◽  
Significance Level ◽  
Chest Expansion ◽  
Significant Difference ◽  
Before And After ◽  
Quasi Experimental ◽  
And Control

Objective Upper Crossed Syndrome (UCS) is a type of musculoskeletal system involvement that results in shortening of anterior muscles and weakening of posterior muscles. The aim of this study was to examine the effect of selected corrective exercises with physioball on the postural status of female computer users with UCS. Methods This quasi-experimental study was conducted on 24 female students with UCS who were selected using a purposive sampling method. The subjects were randomly divided into two groups of exercise (n=12) and control (n=12). The exercise group performed exercises for 6 weeks. Photogrammetry method was used to measure the angle of the forward head and round shoulder. A flexible ruler was used to measure the angle of kyphosis, and tape measure was used to measure the chest expansion. These measurements were performed before and after intervention. The collected data were analyzed using paired t-test and ANOVA at the significance level of P<0.05. Results There was a significant difference in mean values of kyphosis (P=0.001), round shoulder (P=0.001), forward head (P=0.002) and chest expansion (P=0.003) before and after exercise. Conclusion Improvement in forward head, round shoulder and thoracic kyphosis angles and chest expansion showed the effectiveness of applied exercise program. Therefore, it is recommended to use this exercise program in computer users with UCS.

scholarly journals MODEL LATIHAN JATUHAN PADA ATLET JUDO UNTUK PEMULA

2021 ◽  
Vol 1 (2) ◽  
pp. 69-76
Author(s):  
Nu'man Aji Haqqo
Keyword(s):  
Research And Development ◽  
Training Model ◽  
Significance Test ◽  
Depth Information ◽  
Significance Level ◽  
Judo Athlete ◽  
Significant Difference ◽  
Before And After ◽  
Judo Athletes ◽  
The Difference

Objectives of research and development Develop and implement the fall training model on Judo Athlete for Beginners, the results of the development of the fall training model on Judo Athlete for Beginners, In addition, research and development is conducted to obtain in-depth information about the development and implementation of the exercise model and know the effectiveness, Model created. This research and development uses Research Development (R D) development methods from Borg and Gall. Subjects in this research and development are reserved for Beginner judo athletes.The model effectiveness test uses a drop test instrument to collect  data on Judo's fall ability. Analysis of research data using t test with significance level of 0.05. Data analysis obtained the average data value of 4 models of fall training on judo athletes for beginners is feasible and effective to improve the fall in the beginner athlete. In the significance test the difference from the data of 4 techniques that the difference from pre test and post rear fall test from stand (1) Test 0.00 0.05. (2) Front fall test from standing: 0.00 0.05 (3) Fall test falls forward: 0.01 0.05 (4) Left-left fall test:0.00 0.05 indicates that there is a significant difference between before and after the effect of treatment Model of fall training on judo athletes for beginners and can increase the fall of judo athletes.

scholarly journals THE EFFECT OF TOPICAL APPLICATION OF APPLE VINEGAR ON STRIAE GRAVIDARUM: A RANDOMIZED CLINICAL TRIAL

2018 ◽  
Vol 11 (7) ◽  
pp. 76
Author(s):  
Maryam Eshghizadeh ◽  
Mahdi Basirimoghaddam ◽  
Samane Najafi ◽  
Zahra Rezvanifar ◽  
Mahdieh Atarodi ◽  
...  
Keyword(s):  
Clinical Trial ◽  
Topical Application ◽  
Health Centers ◽  
Controlled Clinical Trial ◽  
Significance Level ◽  
Demographic Questionnaire ◽  
Significant Difference ◽  
Before And After ◽  
The Difference ◽  
The Right

Objective: Striae happen to 50–90% of pregnant women and never disappears completely. It is, therefore, a major aesthetic concern for most women, which can cause psychological distress and disturbed body image. This study was conducted to examine the effectiveness of the topical use of apple vinegar on striae gravidarum.Methods: This randomized controlled clinical trial study was conducted on 23 women referred to health centers in Gonabad city, selected according to inclusion criteria and systematic random method. The right half of the abdomen in each participant was considered as a trial group and the left half as the control. On the trial side, apple vinegar was massaged onto striae twice daily for 1 month. Data were collected using a demographic questionnaire, checklist of striae aesthetic change, a pair of calipers and a camera and analyzed in SPSS-20 using descriptive statistics, paired t, and Wilcoxon tests at significance level p<0.05.Results: No significant change was observed in mean length and width of striae in either trial or control sides after the intervention (p>0.05). However, on the trial side, the difference between striae length and width before and after the intervention was statistically significant (p<0.001). A significant difference was observed during intervention in the reduction in striae length and width on trial side (p<0.001).Conclusion: Topical application of apple vinegar effectively reduces the size of striae. Further and longer studies with larger sample size are recommended.

Cryopreservation of epididymal and ejaculated bull spermatozoa

2019 ◽  
Vol 59 (5) ◽  
pp. 861
Author(s):  
A. M. Raseona ◽  
T. L. Rammutla ◽  
K. Kalobo ◽  
D. M. Barry
Keyword(s):  
Sperm Motility ◽  
Unknown Origin ◽  
Live Cells ◽  
Epididymal Sperm ◽  
Mean Values ◽  
Sperm Analysis ◽  
Three Samples ◽  
Significant Difference ◽  
Before And After ◽  
The Difference

The present study was undertaken to assess viability of frozen–thawed bull semen collected from the bull’s ejaculate and cauda epididymis. A total of 30 ejaculates were collected from three bulls twice per week for 5 weeks (Control). Caudal epididymis were collected from slaughtered beef cattle of unknown origin from the local abattoir. Caudal epididymal sperm was recovered immediately after slaughtering (EP-0 h) and after cooling at 5°C for 24 h (EP-24). The epididymal and ejaculated samples were each pooled together before being extended with Triladyl. Diluted samples per treatment were loaded into a 0.25-mL French straw and cooled to 5°C in 4 h. Cooled straws were placed 4 cm above liquid nitrogen to freeze for 10 min. Frozen straws were immersed into LN2 and kept for 7 days at −196°C. Samples were analysed immediately after dilution and post-thawing using the computer aided sperm analysis for sperm motility rate, viability and acrosome defects. The highest sperm motility rates were observed with EJ-0 h before and after cryopreservation. However, the difference in sperm motility parameters between EP-0 h and EP-24 h evaluated before and after freezing was not significant (P &gt; 0.05). Furthermore, no significant difference in live cells mean values was observed between the three samples on freezing (P &gt; 0.05). In relation to spermatozoa acrosome defects, there was no significant difference observed among the three samples before and on freezing (P &gt; 0.05). In conclusion, the results from the present study revealed that cooling of epididymides at 5°C for 24 h before the recovery of sperm cells was efficient in preserving epididymal sperm viability. However, ejaculated bull spermatozoa had higher sperm motility and viability rate than epididymal sperm.

scholarly journals Perbedaan Likuiditas Saham Sebelum dan Setelah Penerapan Keputusan Perubahan Satuan Perdagangan (Studi Pada Emiten di JII)

2015 ◽  
Vol 2 (3) ◽  
pp. 265
Author(s):  
Mirza Dewi Riskyta ◽  
Leo Herlambang
Keyword(s):  
Trading Volume ◽  
Stock Exchange ◽  
Hypothesis Test ◽  
Investment Decision ◽  
Significance Level ◽  
Study Approach ◽  
Significant Difference ◽  
Before And After ◽  
Event Date ◽  
The Difference

Application of unit trade change decision is one that can be used as balance information for the investors to take an investment decision. Investors must be able to analyse the signal of any information regarding the application. That signal can change of supply and demand’s shares. This study aims to find out the reaction of stock liquidity on application of unit trade change decision indicated by the difference of Trading Volume Activity (TVA) and Transaction Frequency Activity (TFA) on before and after the application of trade change decision. This study use event study approach held on 30 emiten of stock listed on Indonesia Stock Exchange period December 2013 – May 2014. This study use observation period for 11 days, are t-5 (five days before the application), t-0 (event date), and t+5 (five days after the application). Hypothesis test use paired t-test. The result based on statistical test with significance level (α) = 5% produce probability value 0.599 for TVA and 0.121 for TFA. Based on these result, it can be concluded that there is no significant difference between TVA and TFA on before and after the application of trade change decision.

scholarly journals Analysis of Cost of Goods Sold Before and After The Issuance of Regulation of the Minister of Finance (PMK) No. 97 / PMK.010 / 2015 In The Metal Industry of Iron and Steel Listed on BEI

2018 ◽  
Vol 27 (1) ◽  
pp. 66-79
Author(s):  
Nelli Novyarni
Keyword(s):  
Stock Exchange ◽  
Comparative Method ◽  
Method Comparison ◽  
Secondary Data ◽  
Sample Number ◽  
Significance Level ◽  
Iron And Steel ◽  
Significant Difference ◽  
Before And After ◽  
The Difference

The external factor affecting the basic iron and steel industry in Indonesia is the Regulation of the Minister of Finance of Indonesia concerning the imposition of import duty tariff on imported goods. The purpose of this study is: to determine the difference in cost of goods sold before and after the Minister of Finance Regulation no. 97 / PMK.010 / 2015. This research uses descriptive research type with quantitative, which measured by using comparative method / comparison with SPSS 23,00. The population of this research is sub metal company and the like listed on Indonesia Stock Exchange (IDX) from 3rd Quarter 2014 to 1st Quarter 2016. Samples are determined purpuse sampling method, with the sample number is 11 companies. The data used in this research is secondary data. Technique of collecting data using documentation method through IDX official website: www.idx.co.id. hypothesis testing using Wilcoxon Signed Ranks Test. It is known that the result of the significance level of 0.768> 0.05.So the conclusion is: there is no significant difference in cost of goods sold before and after the Regulation of the Minister of Finance No. 97 / PMK.010 / 2015.

Sensitivity of bioelectrical impedance to detect changes in human body composition

1989 ◽  
Vol 67 (4) ◽  
pp. 1643-1648 ◽  
Author(s):  
R. Ross ◽  
L. Leger ◽  
P. Martin ◽  
R. Roy
Keyword(s):  
Body Composition ◽  
Human Body ◽  
Correlation Coefficients ◽  
Bioelectrical Impedance ◽  
Mean Values ◽  
Significance Level ◽  
Exercise Regimen ◽  
Before And After ◽  
Hydrostatic Weighing ◽  
Human Body Composition

The purpose of this study was to compare the estimates of lean body mass (LBM) and percent body fat (%BF), as predicted by bioelectrical impedance (BIA) and sum of skinfolds (SF), with those derived by hydrostatic weighing (HW) obtained before and after a 10-wk diet and exercise regimen. The experimental (E) group consisted of 17 healthy male subjects; 20 healthy males served as the control (C) group. Post hoc Scheffe contrasts computed on E group data indicated that, for both LBM and %BF, the Lukaski and Segal BIA equations, as well as the Durnin SF equation, derived mean values that were not significantly different (0.05 significance level) from HW in both pre- and postregimen conditions. For LBM, the same equations derived the following significant (P less than 0.01) correlation coefficients for both pre- and postregimen data: Lukaski, 0.87 and 0.85; Segal, 0.89 and 0.87; and Durnin, 0.90 and 0.88. For %BF, the correlation coefficients were slightly lower but remained statistically significant (P less than 0.01). The findings of this study suggest that the BIA method, by use of either the Lukaski or Segal prediction equations, is a valid means of predicting changes in human body composition as measured by the Siri transformation of body density.

Effect of smoking on cardiovascular autonomic functions

2021 ◽  
Vol 9 (2) ◽  
pp. 3780-3784
Author(s):  
P.Vani ◽  
◽  
Sharan B Singh M ◽  
Keyword(s):  
Heart Rate ◽  
Autonomic Function ◽  
T Test ◽  
Resting Heart Rate ◽  
Autonomic Functions ◽  
Mean Values ◽  
Function Tests ◽  
Significant Difference ◽  
The Mean ◽  
The Difference

Introduction: Cigarette smoking is a prime risk factor for cardiovascular morbidity and mortality. Chronic smoking results in autonomic dysfunction leading to increased cardiovascular risk in smokers. The present study was planned to study the effect of smoking on the Cardiovascular Autonomic Functions among smokers. Materials and Methods: Fifty male subjects who were in the age group of 25 to 45 years. They were grouped into 25 smokers and 25 non-smokers. The participant subjects were selected among the staff members, residents and the patients from the routine OPD in SVIMS. Prior to study, they were informed about the procedure and the purpose of the study tests and written consents were obtained from them. The Cardiovascular Autonomic Function Tests were assessed by using a POLYGRAPH which was available in the department. Results and Conclusion: After applying the ‘t’-test for the difference between the two sample means, it was observed that there was a highly significant difference between the mean values of the BMI(i.e.p<0.01) and the para-sympathetic function tests among the smokers and the non – smokers(i.e.p<0.00). The Resting Heart Rate had significantly increased and the Deep breathing difference, the postural tachycardial index (Response to standing) and the Valsalva Ratio had significantly decreased in the smokers as compared to those in the non – smokers. After applying the ‘t’-test for the difference between the two sample means, it was observed that there was no significant difference between the mean values of the Postural hypotension test (i.e. p>0.05) and that there was a highly significant difference between the mean values of the Sustained handgrip test in the smokers and the non – smokers (i.e. p<0.00). KEY WORDS: Cardiovascular autonomic function tests, Smoking, Resting heart rate.

scholarly journals A double-blind randomized controlled trial of topical Curcuma xanthorrhiza Roxb. on mild psoriasis: clinical manifestations, histopathological features, and K6 expressions

2018 ◽  
Vol 27 (3) ◽  
pp. 178-84 ◽  
Author(s):  
Githa Rahmayunita ◽  
Tjut N.A. Jacoeb ◽  
Endi Novianto ◽  
Wresti Indriatmi ◽  
Rahadi Rihatmadja ◽  
...  
Keyword(s):  
Controlled Trial ◽  
Clinical Manifestations ◽  
Effective Treatment Option ◽  
Psoriasis Area Severity Index ◽  
Double Blind ◽  
Old Patients ◽  
Mean Values ◽  
Significant Difference ◽  
Curcuma Xanthorrhiza ◽  
The Difference

Background: Curcuma xanthorrhiza Roxb. exerts its anti-inflammatory effects by reducing the concentration of IL-6, IL-8, and phosphorylase kinase, which has role in keratinocyte proliferation. Our study aimed to evaluate the efficacy of C. xanthorrhiza in psoriasis.Methods: From 18 to 59 year-old patients with mild psoriasis, 2 similar lesions were selected. The severity assessment was based on the psoriasis area severity index (PASI), Trozak score, and K6 expression. Using a double-blinded randomized method, lesion was treated with 1% C. xanthorrhiza ointment vs placebo for 4 weeks. The results were analyzed by the chi-square test using STATATM V.12 software (Stata Corp.).Results: The study was conducted in 2010 to 2012 with 17 subjects participated. The median of PASI score were reduced significantly in both lesions, either treated with 1% C. xanthorrhiza ointment vs placebo; however when compared between the group, it was not significant (p=0.520). The Trozak score were reduced in lesions treated with 1% C. xanthorrhiza ointment; but it was not significant (p = 0.306). In lesions treated with placebo, the Trozak score was increased significantly. The difference of Trozak score between lesions treated with C. xanthorrhiza and placebo was significant (p=0.024). There was no significant difference of K6 expression in lesions treated with 1% C. xanthorrhiza ointments or placebo as well as on the difference of mean values of K6 expression between the group (p=0.827).Conclusion: Based on the results, 1% C. xanthorrhiza ointment is effective treatment option for mild psoriasis, but longer follow-up period is suggested to confirm this results. C. xanthorrhiza ointment is safe for topical administration as there were no side effects reported in this study.

Sign in / Sign up

Export Citation Format

Share Document