A Review on Effect of Geometrical Variation in IC Engine Cylinder

When fuel is burned in an engine, heat is generated. Additional heat is also created by the friction between the moving parts. The engine cylinder is one of the most important automotive components which is exposed to temperature fluctuations and high thermal loads. To cool the cylinder, fins are provided on the surface of the cylinder to increase the rate of heat transfer. When performing a thermal analysis of the engine cylinder fins, it is helpful to know the heat dissipation within the cylinder. We know that by increasing the area, we can increase the rate of heat dissipation, so designing such a large and complex motor is very difficult. The main objective is to analyze the thermal properties by varying the geometry, material and thickness of the cylinder fins using a CAD software

Profile of COVID-19 patients in COVID dedicated tertiary care centre in Himachal Pradesh: a prospective observational cross sectional study

Background: COVID-19 pandemic originated in China in December 2019 and fumed in whole world over few months. Millions of deaths have occurred worldwide till now because of this pandemic. Causative agent was identified as severe acute respiratory syndrome corona virus 2 (SARS-CoV-2) causing viral pneumonia and serious manifestations were seen in association with increased age and comorbidies.Methods: This study was planned in very initial stage of pandemic in our country to study the profile of COVID-19 patients. This study was conducted over a period of six months from April 2020 to September 2020 at SLBSGMCH, Mandi at Nerchowk.Results: 202 patients were enrolled for this study with mean age of presentation 48 years, 61 were females, 147 (72%) were senior citizens, most patients were from district Mandi and most common symptoms were fever (58%), cough (46%), shortness of breath (35%) and associated commonest comorbidities were hypertension (HTN) (29%) and diabetes (23%). Median neutrophil to lymphocyte ratio (NLR) was higher (5.47) in moderate to severe disease and associated with poor outcome. All the 11 patients who were put on support of ventilator, succumbed to death.Conclusions: Most common symptoms were fever, cough, shortness of breath and most common comorbidty was HTN. Comorbidity, increased age and higher NLR were risk factors for severity and poor outcome. More research is needed to save mankind from this pandemic as still no specific therapy is available against this virus

CoMFA and CoMSIA Studies on 6, 8-Dibromo–4(3H)-Quinazolinone Derivatives for Anti-Bacterial Activity Against Salmonella typhimurium

In order to explore the structure – activity relationship of quinazolinone moiety for anti-bacterial activity against Salmonella typhimurium, a series of 4(3H) – quinazolinone derivatives were subjected to Comparative molecular field analysis (CoMFA) and Comparative Molecular Similarity Indices Analysis (CoMSIA) methods. The best models for CoMFA and CoMSIA had correlation coefficient of 0.905 & 0.868 and cross-validated correlation coefficient of 0.501 & 0.592 respectively. The information obtained from the above models might be useful in designing of quinazolinone moiety as potent anti-bacterial agents

Catastrophic Ice-Debris Flow in the Rishiganga River, Chamoli, Uttarakhand (India)

A catastrophic flood occurred on 7 February 2021 around 10:30 AM (local time) in the Rishiganga River, which has been attributed to a rockslide in the upper reach of the Raunthi River. The Resourcesat 2 LISS IV (8 February 2021) and CNES Airbus satellite imagery (9 February 2021) clearly show the location of displaced materials. The solar radiation observed was higher than normal by 10% and 25% on 6 and 7 February 2021, respectively, however, the temperature shows up to 34% changes. These conditions are responsible for the sudden change in instability in glacier blocks causing deadly rock-ice slides that led to the collapse of the hanging glacier as a wedge failure. The displaced materials mixed with ice, snow, and debris caused catastrophic floods downstream within no time that destroyed critical infrastructure and killed human lives. The hydrodynamic modelling (HEC-RAS software) shows mean flow velocity up to 22.4 ± 8.6 m/s with an average depth of 16.3 ± 6.5 m that caused deadly devastation in the source region and along the rivers due to the flow of water in the valley

Functional characterization of Helicobacter pylori DnaB helicase

Helicobacter pylori causes gastric ulcer diseases and gastric adenocarcinoma in humans. Not much is known regarding DNA replication in H. pylori that is important for cell survival. Here we report the cloning, expression and characterization of H. pylori DnaB (HpDnaB) helicase both in vitro and in vivo. Among the DnaB homologs, only Escherichia coli DnaB has been studied extensively. HpDnaB showed strong 5 to 3′ helicase and ATPase activity. Interestingly, H. pylori does not have an obvious DnaC homolog which is essential for DnaB loading on the E. coli chromosomal DNA replication origin (oriC). However, HpDnaB can functionally complement the E. coli DnaB temperature‐sensitive mutant at the non‐permissive temperature, confirming that HpDnaB is a true replicative helicase. Escherichia coli DnaC co‐eluted in the same fraction with HpDnaB following gel filtration analysis suggesting that these proteins might physically interact with each other. It is possible that a functional DnaC homolog is present in H. pylori. The complete characterization of H. pylori DnaB helicase will also help the comparative analysis of DnaB helicases among bacteria

Evaluation of relationship between bone mineral density and fragility fracture in perimenopausal women between 40-58 years of age: a hospital based prospective observational study

Background: At present the risk assessment for osteoporosis using low bone mineral density (BMD) is based on data obtained from elderly females, largely ≥ 65 years of age. The risk factors for low peak bone mass or accelerated bone loss that occurs during perimenopausal phase is ignored in this risk assessment. Osteoporosis is found to occur at a relatively younger age in the Indian population. Although lower BMD values have an established identity as a major risk factor for fractures in postmenopausal women, we endeavour to evaluate relationship between bone mineral density and fragility fracture in perimenopausal women.Methods: 65 Patients were recruited for the study. After X-ray of involved part, patients were divided into cases (with fracture, n=33) and control (no bony injury, n=32). All patients underwent dual energy X-ray absorptiometry (DEXA) scan. Results of DEXA scans were evaluated in both the groups. BMD was expressed in g/cm2.Results: 33 patients (50.77%) were diagnosed as fracture, 32(49.23%) had no bony injury. Threshold bone mineral density (BMD) for fragility fracture found out asfor L1, cut off ≤0.767. For L2, cut off ≤0.829. For L3, cut off ≤0.811. L4, cut off ≤0.798. For L1-L4, cut off ≤0.845. For left femur total hip, cut off ≤0.918. For left forearm-total, cut off ≤0.411. For right femur total hip-cut off ≤0.795. For right forearm-total, cut-off≤0.382.Conclusions: Perimenopausal women having BMD below threshold for involved site are at risk of fragility fracture and should be given prophylactic treatment to improve bone mineral density

The clinical and etiological profile of atrial fibrillation after echocardiography in a tertiary care centre from North India - a cross sectional observational study

Background: Atrial fibrillation (AF) is the most common sustained arrhythmia in clinical practice. In western countries, rheumatic heart disease (RHD) is a rare cause of atrial fibrillation but in developing countries like India it is one of the commonest cause of atrial fibrillation. We studied etiology, left atrial size and the incidence of left atrial appendage clot in patients with atrial fibrillation at our institution so that guidelines could be formulated to manage the patients of AF in the hours of emergency.Methods: 110 consecutive patients of atrial fibrillation coming to emergency, cardiology and medicine outpatient department over a period of one year were enrolled for the study. Ethical committee clearance was taken. Detailed history were taken, clinical presentation reviewed  and examination were carried out. All patients were subjected to transthoracic echocardiography and for transesophageal echocardiography if required.Results: The mean age of patients in the study was 58.42±14.27 years (range 22-90 years). Maximum numbers of patients were in the age group of 61-70 years (26.37%). Out of 110 patients with atrial fibrillation, 72 patients (65.46%) were females and 38 patients (34.54%) were males. Majority of patients presented with more than one symptom. Out of 110, 66 patients (60%) had RHD. Among RHD patients, 50 patients (45.55%) were females and 16 patients (14.55%) were males. Next common causes were hypertensive heart disease and degenerative valvular heart disease.Conclusions: In our study RHD was the most common cause of atrial fibrillation, followed by hypertensive heart disease and degenerative valvular heart disease. Mitral valve involvement was seen in all patients of RHD. Left atrial enlargement was seen in majority of patients, so left atrial enlargement could be a predictor of atrial fibrillation. Patients of left atrial enlargement are more prone to develop left atrial appendage clot

A REVIEW UPDATED ON ETHNOPHARMACOLOGICAL PROFILE OF KIRGANELIA RETICULATA POIR (BAILL). : AN IMPORTANT HERBAL PLANT

Kirganelia reticulata (Poir.) Baill. is known for its importance in various traditional medicines around the world. In present review covers a literature survey across from 1971 to 2014 until now. The some information collected from published literature on species of Kirganelia reticulata (Poir.) Baill. (=Syn. Phyllanthus reticulatus Poir.).The extract and the compounds isolated from Kirganelia reticulata show a wide spectrum of biological activities including antidiabetic, antibacterial, antioxidant, hepatoprotective, antiplasmodial, anticiceptive, analgesic and anti-inflammatory properties

KIRGANELIA RETICULATA (POIR) BAILL.-A REVIEW ON ITS BOTANY, ETHNOBOTANY, PHYTOCHEMISTRY AND PHARMACOLOGY

Ethnopharmacological relevance: Kirganelia reticulata (Poir.) Baill. is known for its importance in various traditional medicine around the world and are proved pharmacologically as an antiviral against Hepatitis B, hepatoprotective, antidiabetic and antioxidant. In Ayurvedic system of Indian medicine recognized its activity against jaundice, diuretic, fever, liver disorder, in bleeding gums, small pox, syphilis, etc. Aim of the review: The review summarizes the up-to-date and comprehensive information concerning the botany, traditional use, phytochemistry and pharmacology of important drug. Kirganelia reticulata and discusses the possible future scope for future research. Material and methods: In present review covers a literature survey across from 1932 to 2012. The some information collected from published literature on species of Kirganelia reticulata (Poir.) Baill. (=Syn. Phyllanthus reticulatus Poir.) and traditional ayurvedic texts. Results: Phytochemical studies have shown the presence of many valuable compounds such as lignans, flavonoids, steroids, coumerins, triterpenes, phenols, flavonones, alkaloids are common compounds in test species. The extract and the compounds isolated from Kirganelia reticulata show a wide spectrum of Biological activities including antidiabetic, antibacterial, antioxidant, hepatoprotective, antiplasmodial, anticiceptive, analgesic and anti-inflammatory properties. Conclusion: The present review summarizes information concerning the morphology, ecology, ethanopharmacologically, phytochemistry, and traditional diseases and applications of K. reticulata. This review target at gathering the research work undertaken till date on this plant in order to provide sufficient baseline information for future works and commercial exploitation