The preservation of food by drying is one of the most commonly used methods in the food processing industry. Watermelon belongs to the family of Cucurbitaceae .The processing of watermelon generates a large amount of waste in the form of rind, peel and seeds. The watermelon rind is an under-utilised waste generated after the consumption of the fruit. Watermelon rind contains vitamin C, dietary fiber, citrulline, potassium, a small amount of vitamin B-6.It is also known to contain a variety of bioactive compounds like cucurbitacin, triterpenes, sterols and alkaloid. The citrulline in watermelon rind gives it antioxidant effects that protect the body from free-radical damage. In this study efforts have been made to dry and preserve the watermelon rind by hot air drying and freeze drying technique. The water absorption capacity, rehydration ratio and the solubility of the freeze dried watermelon rind powder were found to be 11.42±0.6 (g/g), 9±0.8 (g/g) and 8±0.5% respectively. Hot air drying significantly reduced the water absorption capacity of the watermelon rind while it increased the water solubility and bulk density. The tannins ,alkaloids and saponin content were found to be lesser in hot iar dried samples compared to freeze dried.
A Provable Data Possession (PDP) scheme allows a client which has stored data at an untrusted server to verify that the server possesses the original data that it stored without retrieving the entire file. In this thesis study, a new PDP scheme is built using the concept of sigma protocols. The client pre-processes a file and stores it on the server. At a later time, the client issues a challenge to the server requesting it to compute a Proof of Possession. The client verifies the response using its locally stored metadata. The challenge-response protocol that is derived from the sigma protocol, minimizes both computation and communication complexity. Implementation and complexity analysis of the algorithms used in the ∑-PDP scheme was done as a part of this thesis. The main goal of this research was to minimize computation and communication complexity of ∑-PDP scheme as compared to the existing PDP schemes.
Aim: To evaluate the role of magnetic resonance imaging (MRI) in the diagnosis of fetal anomalies at 18-20 weeks of gestation. Materials and methods: We retrospectively reviewed fetal MRI examinations done during June 2014-May 2018. There were 23 referrals for fetuses at 18-20 weeks gestation, out of the total 330 referrals for fetal anomaly evaluation. The MR images were read independently by two radiologists. When there was discrepancy in the diagnosis, the final diagnosis was arrived by consensus. Results: There were 23 examinations for fetuses at 18-20 weeks of gestational age that showed 27 anomalies. This included 22 central nervous system (CNS), 2 thoracic, 1 gastrointestinal, 1 genitourinary, and 1 miscellaneous anomalies. In the 23 pregnant women, termination of pregnancy was carried out in 18 and three women were managed conservatively. Follow-up was lost in two women. Conclusion: MRI is a complementary tool to ultrasound in the evaluation of fetal anomalies. With advancement of MRI scanner technology and growth of knowledge, more number of anomalies can be diagnosed at or before 20 weeks gestational age. Clinical significance: Diagnosing fetal anomalies at or before 20 weeks by MRI is challenging because of increased fetal movements and small size of the fetus. However, improved techniques may facilitate early detection. This becomes a necessity in some countries where elective termination of pregnancy is allowed only up to 20 weeks. This article highlights that MRI can also provide additional information on select cases during 18-20 weeks.
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