Characterization of Hybrid FRP composites with Hygrothermal Exposure Under Varied Ambient Conditions

The present experimental study aims at assessing the effect of moisture and temperature on the mechanical properties of hybrid FRP composites. Samples of several Carbon-Glass-Epoxy hybrids were manufactured using hand layup method where the stacking of plies was alternate and the weight fraction of fibre and matrix was kept at 50%-50%. Specimens were cut from the fabricated laminate according to the ASTM D 2344-84(1989) standards. Some of these specimens were kept in the As-Cured condition so as to obtain the base properties. Rest specimens were then subjected to hygrothermal environment where the relative humidity was maintained at 95% and the temperature at 60°C for 24,48,72,96,120 hours. These specimens were divided into groups of five. One group was subjected to cryogenic conditions at -40°C for 2 hours and the other group was subjected to elevated temperature at 50°C for 2 hours. These treated samples were then subjected to short beam shear test or 3 point bend test. The ILSS (shear strength) values were then compared with the base values of as cured specimen. Differential scanning calorimetry was done to find the Tg variation. Degradation of mechanical property was found to be most prominent is case of specimens subjected to elevated temperature (50°C) after hygrothermal treatment. SEM analysis was done to ascertain the mode of failure

Ethnomedicinal plants used in malaria in tribal areas of Odisha, India

The present paper deals with 38 ethnomedicinal plant species belonging to 37 genera and 24 families used for prevention and treatment of malaria by the tribal and indigenous non-tribal communities of Sundargarh, Mayurbhanj, Angul, Balangir, Deogarh and Nuapada districts of Odisha. This first-hand ethnomedicinal information for their therapeutic use against malaria was collected directly from a field survey of 404 remote tribal villages and forest areas of these 6 districts during 2006-2017. Additionally, uses of other 6 plants for the treatment of the same diseases were also recorded from the already published literature on these districts. These plant species are arranged in alphabetical order followed by family, habit, local name(s), locality(ies), field number(s) along with a method of preparation and mode of ethnomedicinal uses in detail

Bone Fractures With and Without Sickle Cell Disease in the Pediatric Population

Background: Individuals with sickle cell disease are restricted from certain physical activities due to the increased risk of complications including fractures secondary to osteopenia. However the exact incidence and outcomes of fractures amongst these patients is unknown. Objectives: (1) describe the incidence, epidemiology, and outcomes of fractures in patients with SCD. (2) to compare fracture patterns and outcomes in patients with and without SCD. Methods: This is a retrospective, cohort study of patients aged 0-25 years old with HbSS, HbSC, or HbS-β-thalassemia with a fracture evaluated at a pediatric emergency department from April 2009-April 2022. Eligible patients were identified using a combination of ICD billing codes and a preexisting hematology clinic database. Patients were age/gender matched with non-SCD patients with fractures. Data on demographics, number and types of fractures and outcomes were collected. Results: 753 patients with SCD were identified during the study period. SCD patients with fractures were more likely to have multiple comorbidities, lower mean vitamin D levels and were less likely to be on vitamin D supplementation compared to those without fractures. The most common etiology was fall and carpal bones were most commonly fractured. Non-SCD patients with fractures were more likely to be obese and require surgical repair compared to their SCD peers. Conclusions: Fracture incidence among SCD patients is low. Male gender, multiple comorbidities, and lack of vitamin D supplementation are associated with increased risk of fracture. SCD patients with a fracture were less likely to require surgical treatment compared to their non-SCD counterparts

Fabrication and Evaluation of Low Density Glass-Epoxy Composites for Microwave Absorption Applications

In the present work, fabrication and evaluation of low density glass – epoxy (LDGE) composites suitable for absorbing minimum 80 per cent of incident microwave energy in 8 GHz to 12 GHz (X-band) is reported. LDGE composites having different densities were fabricated using a novel method of partially replacing conventional S-glass fabric with low density glass (LDG) layers as the reinforcement materials. Flexural strength, inter laminar shear strength and impact strength of the prepared LDGE composites were evaluated and compared with conventional High density glass-epoxy (HDGE) composites to understand the changes in these properties due to replacement of S-glass fabrics with LDG layers. To convert LDGE structures to radar absorbing structures controlled quantities of milled carbon fibers were impregnated as these conducting milled carbon fibers can act as dielectric lossy materials which could absorb the incident microwave energy by interfacial polarisation. Electromagnetic properties namely loss tangent and reflection loss of carbon fiber impregnated LDGE composites were evaluated in 8 GHz -12 GHz frequency region and compared with HDGE composites. It was observed that both LDGE and HDGE composites have shown loss tangent values more than 1.1 and minimum 80 per cent absorption of incident microwave energy. Thus the results indicates that, LDGE composites can show EM properties on par with HDGE composites. Furthermore these LDGE composite could successfully withstand the low velocity impacts (4.5 m/s) with 50 J incident energy. Due to their ability to show good mechanical properties and light weight, LDGE composites can be used as a replacement for conventional HDGE composites to realise radar absorbing structures

Can Recreational Diver Surveys Lead to Conservation Action? A Case Study of the Revillagigego Archipelgo

Surveys were conducted with recreational divers in the Revillagigedos Islands to determine if the island’s tourist attracting shark and manta ray populations have always been so abundant. A comparison with historical data was done to determine how populations may have changed over time

Zum Humor bei Jean Paul : ein Beitrag zum Verständnis Jean Pauls

von Johannes BaskeIn FrakturProgr.-Nr. 1

A Retrospective Study to Evaluate Maternal and Fetal Outcomes in Vaginal Birth After Cesarean Section

Background: Primary cesarean section (CS) rates are increased these days. A growing number of women report having had a previous CS. The aim of this study was to determine the factors that influence maternal and fetal outcomes in vaginal birth after Caesarian section.Methodology: A retrospective research was performed on 100 postpartum women who gave birth vaginally in SNMMCH, Dhanbad, Jharkhandafter a previous Caesarian section from 01/09/19to31/03/21. The research enlisted the aid of women who had already undergone one LSCS. With nonrecurrent indications and prior vaginal delivery either before or after caesarian sectionin all cases, a complete history and abdominal and vaginal examinations are performed shortly after admission to determine the size of the fetus, its location and appearance, membrane status, cervical dilatation, bishop score, and the adequacy of the maternal pelvis.Results: 169 women who had previously caesarian section were offered a trial of labor (82.84 %) out of 204 women with previous CSs. 100 women with prior LSCS had healthy vaginal births out of them. After caesariansection, the success rate of vaginal delivery was found to be 59.17%. During the study period, there were 69 LSCS for failed labor trials. In the current research, uterine rupture occurred in 1% of cases.Conclusion:If cases are carefully selected, vaginal birth after Caesarean is a healthy option. After a caesarian, vaginal birth should not be attempted for at least two years

Ethnomedicinal plants used for dental care in Sundargarh, Mayurbhanj, Angul and Balangir districts of Odisha, India

419-424The paper deals with 31 plant species belonging to 29 genera and 20 families comprising 40 ethnomedicinal uses for dental care (tooth ache, tooth decay, pyorrhea, foul smell and as tooth brush) by the different tribal and rural people in Sundargarh, Mayurbhanj, Angul and Balangir districts of Odisha. These uses were compared and cross-checked with the published ethnomedicinal data from Odisha and other states of the country and found that 12 uses of the referred plants had not been reported earlier. These plant species are arranged alphabetically with their botanical names, family and local name(s), followed by the method of uses for dental care along with field collection number(s) and uses cited by earlier workers. </span