Evaluation of the Effect of Water on Three Different Light Cured Composite Restorative Materials Stored in Water: An In Vitro Study

Objectives. The objective of this in vitro study was to investigate whether weight gain or loss in the three different composites occurs due to water absorption when they are stored in water. Methods. The composite restorative materials selected for this study included a microfine hybrid (Synergy) and two nanofilled composite restorative materials (Ceram X and Filtek Supreme Ultra). Twenty specimens of each material were fabricated of each composite material. Group A: Filtek Supreme Ultra, Group B: Synergy, Group C: Ceram X. Then all the specimens were stored in 10 ml Distilled water containing test tubes and placed in incubator at 37°C for six weeks. The weight changes of these specimens were measured daily for the first week and later once a week for next five weeks by using an electrical analytical balance. Results. The data was analyzed by one-way analysis of variance and Student's t test. All groups showed maximum amount of water absorption in the first week than gradual decrease in the water absorption from the second to the sixth week, as compared to the first week and there is no statistically significant difference between the groups tested. Conclusion. All the composite restorative material absorbs some amount of water. The water absorption of the composite may decrease the physical and mechanical properties of the composites; hence it is necessary to consider the type of the material before starting the treatment

Optimization of Wear Behavior of Magnesium Alloy AZ91 Hybrid Composites Using Taguchi Experimental Design

In the present paper, the statistical investigation on wear behavior of magnesium alloy (AZ91) hybrid metal matrix composites using Taguchi technique has been reported. The composites were reinforced with SiC and graphite particles of average size 37 μm. The specimens were processed by stir casting route. Dry sliding wear of the hybrid composites were tested on a pin-on-disk tribometer under dry conditions at different normal loads (20, 40, and 60 N), sliding speeds (1.047, 1.57, and 2.09 m/s), and composition (1, 2, and 3 wt pct of each of SiC and graphite). The design of experiments approach using Taguchi technique was employed to statistically analyze the wear behavior of hybrid composites. Signal-to-noise ratio and analysis of variance were used to investigate the influence of the parameters on the wear rate

A rare presentation of hyperhomocysteinemia and folate deciency asCSVT in young male

Introduction: Cerebral sinus venous thrombosis (CSVT) is a relatively rare, potentially fatalneurological condition that can be frequently overlooked due to its vague nature and its variedspectrum of clinical presentation. It’s a multifactorial condition with gender-related specific causes.It’s a rare form of venous thromboembolism representing almost 0.5-3 % of all types of stroke,affecting predominantly younger people, and females three times more commonly affected thanmales. Incidents in adults are 3- 4 million. The diagnosis of CSVT is becoming easier now days dueto advanced neuroimaging techniques. Abnormality in the thrombophilic profile is associated withenhanced risk of CSVT. It has varied etiologies such as the Hypercoagulable States (inherited) that ishyperhomocysteinemia, protein C and protein S deficiency, Antithrombin-III deficiency, Factor Vleiden mutations, autoimmune causes. Other acquired causes like CNS infection, trauma,dehydration, pregnancy, substances abuse and oral contraceptives

SYNTHESIS, ANTICANCER AND ANTITUBERCULOSIS STUDIES FOR [1-(4-CHLOROPHENYL) CYCLOPROPYL] (PIPERAZINE-YL) METHANONE DERIVATES

Objective: Synthesis, anticancer and antituberculosis studies for 1-(4-Chlorophenyl) cyclopropyl] (piperazin-1-yl) methanone derivates 3a-j Methods: A series of new [1-(4-Chlorophenyl) cyclopropyl] (piperazin-1-yl) methanone derivates were synthesized using reductive amination method in presence of sodium triacetoxyborohydride to yield piperzine derivatives 3a-j. The structures of all newly synthesized compounds have been characterised by elemental analysis and spectral studies. Results: Five selected compounds have been screened for invitro anticancer activity against human breast cancer cell line MDA-MB-435 at 10, 20, 40 and 80 µG/mL concentration using sulforhodamine B assay method. and Two compounds 3a and 3c have shown in vitro anticancer activity. Five selected compounds have been screened for anti-tuberculosis activity using Middlebrook 7H-9 broth and standard strain of M. tb h37Rv. Three compounds 3a, 3b and 3c have shown significant antituberculosis Conclusion: Synthesis of [1-(4-Chlorophenyl) cyclopropyl] (piperazin-1-yl) methanone derivates 3a-j simple and convenient method. Some of the tested compounds have exhibited significant antituberculosis and anticancer activity. Compound 3c showed both antituberculosis and anticancer activity

Correlation of sonographic prostate volume with international prostate symptom score in South Indian men

Background: Benign prostatic hyperplasia (BPH) is a common disease in old age individuals, usually starts around the age of 40 years, the prevalence of benign prostatic hyperplasia rises to more than 50% at 50 years of age to as much as 90% at the age of 85 years. Proven BPH patients suffer from moderate to severe lower urinary tract symptoms (LUTS) that are symptoms related to storage and voiding of urine. This study was to determine relationship between sonologically measured prostate Volume and international prostate symptom score (IPSS).Methods: Clinically symptomatic 126 patients in the age group of 40-89 years were studied. All the patients underwent Transabdominal sonography for the estimation of prostate volume and clinical questionnaire for international prostate symptom score.  Statistical Analysis by descriptive and analytical statistics using SPSS version 16. Chi-Square test used and P values ≤ 0.05 was considered to be statistically significant.Results: Among 126 individuals, The maximum number of patients, that is 45 patients had the prostate volume measuring 31-50 cc (35.7%), followed by 25 patients (19.8%) had the volume measuring more than 50 cc. Maximum number of patients 52 (41.3%) were having severe symptoms, 47 (37.3%) patients were having moderate symptoms and 27 patients   symptoms and 27 patients (21.4%) were having mild symptoms. Prostate volume had statistically significant but weak correlation observed with IPSS (r=0.40, p=0.001), Weak Stream (r=0.31, p=0.001) and urgency (r=0.31, p=0.001).Conclusions: Prostate volume had statistically significant but weak correlation observed with IPSS.

Role of sonography in the assessment of dengue fever with serological correlation

Background: Dengue, caused by a flavivirus has emerged as a major public health problem in the Indian subcontinent. This study was to assess severity of disease by ultrasound findings and to correlate ultrasound findings with blood platelet count.Methods: A Cross sectional study carried out on 210 subjects who had serologically proven dengue fever were included in the study. Ultrasound of abdomen, pelvis and thorax was performed and imaging features were analysed by descriptive and analytical statistics using SPSS version 16. Chi-Square test used and P values ≤ 0.05 was considered to be statistically significant.Results: Mean age of patients 42± 19 years with 106(50.5%) males and 104(49.5%) females. The Gall bladder wall thickening was noted in majority (92.8%) of the study subjects followed by Right peri-renal collection in 112(53.3%), Splenomegaly in 105(50.0%) subjects and Hepatomegaly in 66(31.4%). The sonographic abnormalities including Gall bladder wall thickening, Right, Left and Bilateral perirenal collection, Splenomegaly, Hepatomegaly, Right and Left pleural effusion, were significantly higher in study subjects with decreased platelet count.Ascites was the commonest finding in 76 study subjects with platelet count between 60000-79000 (36.2%) and in 144 study subjects (68.5%) in the 20-59 years age group. As the   platelet count decreased the severity of ascites increased and was statistically significant (p≤0.05).Conclusions: A patient who presents with sonographically recognizable complications is more likely to have disease that requires immediate and aggressive management.

DESIGN AND FABRICATION OF COMPACT HEAT EX-CHANGER FOR MULTIPLE PURPOSE USAGE

In many industrial applications compact heat exchangers role became important because to enhance of heat transfer rate and for better performance. Further the compact heat exchangers are being considered for heavy duties to increase more heat transfer by involving the phase change processes at boiling and also condensation. In mean while understanding the thermal-hydraulic characteristics of flow passages for compact heat exchangers the phase change vitally important. But for those compact heat exchangers, which have long been used for boiling and condensation duties, the design procedures are based on local two-phase characteristics. As new type of compact heat exchanger with modified design and with enhancement are capable of handling single phase as well as phase change duties. These new exchangers are being increasingly used in single-phase applications, and at the same time, they are also being considered for two-phase duties. In this present paper describes the design and fabrication of fin based compact heat exchanger for industrial applications as well as automobile industry. In this context, a review on performance of compact heat exchangers with different configurations is presented. The enhanced heat transfer techniques for compact heat exchangers in various application

Media Optimization for Depolymerization of Alginate by Pseudomonas aeruginosa AG LSL-11

ABSTRACT An agar degrading bacterium Pseudomonas aeruginosa AG LSL-11 was acclimatized to alginate for the production of alginase. Production parameters such as pH, temperature, influence of simple carbohydrates and nitrogen sources, and effect of NaCl on growth and alginase production were carried out. Maximum growth was observed at pH 9.0 and 35 °C, while alginase was produced optimally at pH 9.0 and 30 °C. The alginase produced by Pseudomonas aeruginosa AG LSL-11 was inducible by alginate, and repressed by other simple sugar when supplemented along with alginate in the medium. The bacterium did not require NaCl for growth and production of alginase. The activity staining of partially purified culture supernatant after native PAGE revealed the presence of a single alginase

EXPOSURE OF CYLINDRICAL GRIDING PROGRESSION ON EN21AM STEEL

Grinding is the machining procedures which beautify ground exceptional and dimensional accuracy of the workpiece. Various process parameters, that have an impact at the cylindrical grinding operation, are the depth of lowering, cloth hardness, workpiece pace, and grinding wheel grain duration, a huge type of passes, material elimination fee and grinding wheel tempo. Speed and feed are essential factors because growing at each pace, and feed has a damaging effect on floor roughness but high fabric elimination reason a reduction in surface roughness. Cylindrical grinding is one of the important metallic lowering tactics used substantially within the finishing operations. Metal removal charge and surface end are the critical output responses in the manufacturing with admire to quantity and extraordinary.  In this thesis, is to arrive at the most effective grinding conditions in an effort to limit ground roughness and maximize steel elimination price even as cylindrical grinding of EN21AMsteel is finished for the optimization of grinding procedure parameters. During this experimental art work input approach parameters i.e. Speed, feed, the depth of cut is optimized the use of the Taguchi method

INTEND AND INVESTIGATION OF FAN BLADE WITH COMPOSITE RESOURCES

With the growing power disaster within the present and destiny generations coping with in the society, there can be a want to reduce and optimize the power. Though an extensive fashion of researches is being executed inside the areas of alternate strength property, right manipulate of them available electricity sources will make contributions to controlling this electricity disaster, especially in populous worldwide locations. Because of superb use of electric energy, energy garage is the precept hassle at some level inside the arena. The recognition of this artwork is to layout the sandwich composite blade with the pinnacle of the road form of plies for the face sheet which will resist the combined stress and centrifugal masses at the equal time as the limitations are happy and the baseline aerodynamic and geometric parameters are maintained. To satisfy the necessities, a sandwich production for the blade is proposed with composite face sheets and an inclined middle crafted from honeycomb aluminium cloth