Effect of Canopy Management Practices during forward Pruning on Berry Development and Photosynthesis in Tas-A-Ganesh Grapes

Effect of canopy manipulation during forward pruning on berry development and photosynthetic parameters was studied in Tas-A-Ganesh grape grafted onto Dogridge rootstock. Canopy manipulation including shoot thinning, leaf removal, shoot thinning with leaf removal, and shoot pinching, was done after forward pruning. Significant differences were observed in yield and quality. Shoot thinning to about 40 shoots per vine, with removal of three basal leaves, resulted in significantly higher yield, followed by that in shoot thinning alone. Lowest yield was recorded in the Control. Leaf removal drastically reduced bunch development affecting berry weight, diameter and length compared to other treatments. Among different canopy manipulation treatments, higher average bunch weight was recorded in shoot thinning plus leaf removal, whereas, lowest bunch weight was recorded with leaf removal alone. At harvest, the amount of total soluble solids in berries was low in leaf removal at pre-bloom stage, but increased in the treatment of shoot thinning with leaf removal, at the same stage. Different canopy manipulation treatments had significant impact on photosynthesis and transpiration rates. Overall results indicated that canopy manipulation practices such as shoot thinning, to retain 40 shoots per vine with or without leaf removal, followed by pinching, can be recommended to grape growers

Trimethoprim-induced hyperkalemia in renal transplant recipient

Trimethoprim-sulfamethoxazole (TMP-SMX) is an antimicrobial agent used in a variety of infections. Adverse reactions are more common in patients with AIDS but occasionally occur in immunocompetent patients. Renal toxicity is usually a hypersensitivity reaction to the sulfa component and manifests as interstitial nephritis or sulfa crystallization in the renal tubules. Reversible hyperkalemia is a rarely reported side effect of TMP-SMX therapy attributed to TMP inhibition of potassium secretion in the distal renal tubule in a manner similar to the potassium-sparing diuretic, amiloride. We report a case of hyperkalemia associated with TMP-SMX occurring in a 32-year-old renal transplant recipient with no other risk factors for hyperkalemia. He was treated with TMP-SMX (800 mg + 160 mg) two tablets QID for suspected pneumocystis jiroveci pneumonia. He developed severe hyperkalemia on day 9 posttherapy. Hyperkalemia reverted to normal with withdrawal of trimethoprim

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Not AvailableWith the availability of antioxidants in grape raisins and its scope as one of the major processed products of grapes, there is huge demand for alternate varieties other than the presently grown commercial variety Thompson Seedless. Eight grape varieties were evaluated for physical and chemical properties of berries and raisins. The raisin recovery ranged from 27.10% (Manjri Kishmish) to 25% in other varieties. Higher yield was recorded in Manjri Kishmish (17.47 kg/Vine). Highest phenol concentration was found in Kishmish Rosavis (0.33 mg/g) followed by Black Monukka (0.31mg/g). Similar trend was observed in tannins where maximum tannins were recorded in Kishmish Rosavis (0.35mg/g) followed by Black Monukka (0.34mg/g). Reducing sugar and carbohydrate was in higher concentration in Clone 2A (71.84% and 77.04% respectively) followed by Manjri Kishmish (68.03% and70.54% respectively). Highest protein content was recorded in Ribier (8.28%) followed by Kishmish Rosavis (7.94%). The variety Manjri Kishmish found better for higher raisin recovery and can be a potential variety in grapegrowing region for raisin purpose.Not Availabl

DESIGN AND DEVELOPMENT OF LABORATORY MODELS OF DYNAMIC VIBRATION ABSORBER

Vibration study has become an integral part of system analysis these days. Most of the system failures occur due to excessive, unwanted vibrations. A Dynamic Vibration Absorber (DVA) is designed fabricated and tested for primary systems having single degree of freedom. The aim of the present study is to design DVA for two primary systems (laboratory models) i.e. Cantilever Beam and Vertical motion model (spring mass system) subjected to forced vibrations. Numerous papers published in international journals were studied and it was found that the research over DVA is not new and in fact there are a variety of practical situations in which DVAs are used. Innovative designs of DVAs which people have come up with were studied from the literature. While trying out various excitation mechanisms it was found that using cam was the best option. With the help of this project the students of our college can understand the concept of which DVAs work in practical situations and which may even inspire them to take up vibration control as their field of study

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Not AvailableSauvignon Blanc wine grape was characterized for their various morphological, physiological and biochemical parameters grafted on different rootstocks. Significant differences were recorded for all the parameters studied. The studies on vegetative parameters revealed that the rootstock influences the vegetative growth thereby increasing the photosynthetic activities of a vine. The highest photosynthesis rate was recorded in 140-Ru grafted vine followed by Fercal whereas the lowest in Salt Creek rootstock grafted vines.The rootstock influenced the changes in biochemical constituents in the grafted vine thereby helping the plant to store enough food material. Significant differences were recorded for total carbohydrates, proteins, total phenols and reducing sugar. The vines grafted on1103-Pshowed highest carbohydrates and starch followed by 140-Ru,while the least amount of carbohydrates were recorded in 110-R and Salt Creek grafted vines respectively.Among the different rootstock graft combinations, Fercal showed highest amount of reducing sugar, proteins and phenols, followed by 1103-P and SO4, however, the lowest amount of reducing sugar, proteins and phenols were recorded with 110-R grafted vines.The vines grafted on different rootstocks showed changes in nutrient uptake. Considering this, the physico-biochemical characterization of grafted vine may help to identify particularrootstocks combination that could influence a desired trait in commercial wine grape varieties after grafting.Not Availabl

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Not AvailableFactors like variety, rootstock, bunch and berry parameters, growing conditions, and biochemical constituents of juice affect adaptability of particular grape variety by the growers. In the present study, grape varieties grown at Pune were evaluated for physico-chemical and sensory quality characteristics. Maxim um bunch weight(455.2 g) was noted in Hy 23-14-23 followed by Medika and Pusa Navrang. Hy 23-14-23 was also noted for highest values of berries per bunch (72), 50 berry weight (175 g) and berry length (16.50 mm). However, maximum juice recovery(73%) was found in Bangalore Purple 9 Gulabi followed by Country Bangalore. The juice of Pusa Navrang was noted with maximum TSS followed by Country Bangalore and Medika. Total acid content in grape juice from different varieties varied from 6.3 g/L in Medika to 9.4 g/L in Ban-galore Purple 9 Gulabi. Minimum volatile acidity was noted in Medika (0.01 g/L) which shows more microbial stability. Maximum phenolics were estimated in juice of Arka Shyam followed by Medika. Based on organoleptic studies, Arka Shyam was highly acceptable followed by Medika. Considering yield, bunch and berry parameters,juice recovery, biochemical and nutritional parameters of juices and score obtained during organoleptic study, Medika was found better than other varieties.Not Availabl