SOLAR ENERGY GRID INTEGRATION SYSTEMS

Solar Energy Grid Integration Systems (SEGIS) concept helps in achieving high penetration of photovoltaic (PV) systems into the utility grid. Advanced, integrated inverter/controllers will be the enabling technology to maximize the bene?ts of residential and commercial solar energy systems, both to the systems owners and to the utility distribution network as a whole. Advanced integrated inverters/controllers may incorporate energy management functions and/or may communicate with separate-alone energy management systems as well with utility energy portals, such as smart metering systems. The value of the energy provided by these solar systems will in turn be increased through advanced communication interfaces and controls.

Elucidation of genotype–environment interactions and genetic stability parameters for yield, quality and agromorphological traits in ashwagandha (Withania somnifera (L.) Dunal)

The present study was undertaken to delineate genotype–environment interactions and stability status of 16 genotypes of ashwagandha (Withania somnifera (L.) Dunal) in context to the 12 characters, namely plant height, number of primary branches, number of secondary branches, days to flowering, days to maturity, number of berries, number of seeds/berry, root length, root diameter, root branches, dry root yield and total alkaloid content (%). Experiment was carried out in a randomized complete block design with three replications over three different locations (S. K. Nagar, Jagudan and Bhiloda) in north Gujarat for three years (2016–17, 2017–18 and 2018–19). Pooled analysis of variance revealed that the mean squares due to genotypes and genotype 9 environment interaction along with linear and nonlinear components were highly significant (P\0.01) for most of the traits under study. Stability parameters for component traits through Eberhart and Russell model showed that genotypes that can be used directly in breeding programme are SKA-4 for early flowering, SKA21 for early maturity and SKA-1, SKA-4, SKA-6 and SKA-17 for shorter plant height. Further, SKA-21 could be used for improving number of primary branches per plant, SKA-11 and SKA-17 for number of secondary branches per plant, SKA-19 for number of berries per plant, SKA-6, SKA-21, SKA-27 and AWS-1 for root branches and SKA-17 for root length as these genotypes were found to be most stable across the environments for mentioned traits. The result revealed that some reliable predictions about genotype 9 environment interaction and its unpredictable components were involved significantly in determining the stability of genotypes. Hence, the present investigation can be exploited for the identification of more productive genotypes in specific environments, leading to significant increase in root productivity of ashwagandha

A Study of Clinical Profile of 50 Patients with Portal Hypertension and to Evaluate Role of Noninvasive Predictor of Esophageal Varices.

Objective: To study the predictive power of noninvasive investigative parameters (clinical, biochemical, radiological) for detection of esophageal varices in patients with portal hypertension (PHT) as compared to invasive parameters (upper gastrointestinal endoscopy). Materials and methods: Fifty patients with PHT, between May 2008 to September 2010, were studied. Those who had decompensated liver diseases, HIV, hepatocellular carcinoma, metastasis in liver, parentral drug addiction, chronic febrile illness, H/O treatment taken for PHT in the form of surgery or endoscopic bending or sclerotherapy were excluded. Detailed clinical history was taken and physical examination was done. All patients underwent the required hematological, biochemical, radiological, endoscopic and histopathological investigations. Results: Platelet count/splenic size showed a significant correlation between presence or absence and grade of esophageal varices (p < 0.00015). If a cut-off value of 1,000/cu mm is taken, then 87.5% (35/40) patients with esophageal varices have ratio <1,000 while 20% (2/10) of patients with ratio <1,000 did not have any varices. It was also observed that lower the ratio, higher the grade of varices. Conclusion: Asymptomatic esophageal varices, which is quite common, can be easily diagnosed with invasive endoscopy or otherwise can be suspected with noninvasive predictors like platelet/spleen size ratio in our country, where financial constraint is a major problem for investigations like endoscopy.

Complications of PEG - Prevention and Management.

Per cutaneous endoscopic gastrostomy (PEG) is one of the most common procedures performed by the gastroenterologist for various indications. The procedure is associated with complications which may be minor or major; though the better part is minor yet a high incidence of morbidity is linked to them. This review article illustrates the complications associated with PEG and various methods to prevent and manage the complications.

Dengue fever presenting as acute acalculus cholecystitis.

Classically dengue fever presents as fever with myalgia. A patient of dengue fever presented with classical symptoms and signs of acute acalculous cholecystitis. Serology and ultrasound examination identified dengue as the aetiology. Patient was treated successfully by conservative measures.

Wegener's granulomatosis--an etiology of acute pancreatitis.

Wegener's granulomatosis is a systemic disease that usually involves the upper respiratory tract and kidneys. We report a 47-year-old man with Wegener's granulomatosis that presented as acute pancreatitis.