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Search Results: 1 - 10 of 1121 matches for " Kumkum Rana "
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The Role of Magnesium in Superalloys—A Review  [PDF]
Kumkum Banerjee
Materials Sciences and Applications (MSA) , 2011, DOI: 10.4236/msa.2011.29168
Abstract: The role of magnesium (Mg) in improving the high temperature mechanical properties of the superalloys, like creep, fatigue, tensile ductility, impact toughness etc. have been vividly studied by several authors. On the other hand, very few authors have contradicted the view of any beneficial effect of Mg on the mechanical properties. This review presents a summary of the open literature related to the effect of Mg on the microstructure and mechanical properties of superalloys and from which further metallurgical research on the unexamined topics are proposed.
Origin of cystic artery from hepatic artery proper and its surgical implications
Sachin Patil,Kumkum Rana,Smita Kakar,Anilkumar Mittal
International Journal of Research in Medical Sciences , 2013, DOI: 10.5455/2320-6012.ijrms20130204
Abstract: Cystic artery is usually a branch of right hepatic artery given in the Calot s triangle. Variations in the origin of cystic artery have been reported but there is paucity of literature regarding these in Indian subjects. The present case describes the origin of cystic artery from the hepatic artery proper, with an unusual course, which was detected during routine cadaveric dissection. The development of biliary vasculature is quite complex and it accounts for many variations. Knowledge of cystic artery variability facilitates intraoperative identification of vessels in both classical and laparoscopic surgery of the bile ducts. This emphasises the importance of a thorough knowledge of the cystic arterial variations that often occur and may be encountered during both laparoscopic and open cholecystectomy. Uncontrolled bleeding from the cystic artery and its branches is a serious problem that may increase the risk of intraoperative lesions to vital vascular and biliary structures during hepatobiliary surgery. [Int J Res Med Sci 2013; 1(1.000): 16-18]
Obituary, Dr. R. J. Maneksha
Khadalia Kumkum
Indian Journal of Plastic Surgery , 2004,
Abstract:
Bilateral serous retinal detachment in a case of eclampsia  [PDF]
Shiny Varghese, Jacob Koshy, Kumkum Avasthi
Health (Health) , 2012, DOI: 10.4236/health.2012.41003
Abstract: Serous retinal detachment is a rare complication occurring in less than 1% of patients with eclampsia. We here report such a case. We strongly recommend the need for an eye check up in all patients of pregnancy induced hypertension especially in community based setup.
Aqueous extract of Ipomoea carnea leaves as green corrosion inhibitor for mild steel in pickling paste
Mahima Srivastava,Kumkum Srivastava
Biointerface Research in Applied Chemistry , 2012,
Abstract: The inhibitor efficiency increased from 50% to 66%. In mixtures of different proportions of HCl (4N) and H2SO4 (4N), Ipomoea carnea showed 61% to 68% protection. The inhibitor efficiency of Ipomoea increased with increase in time of application. The rate of dissolution increased with temperature. Results also show that inhibitor maintained its effectiveness over entire range of temperature. Corrosion current reduced with time both in uninhibited and inhibited paste. In uninhibited paste, the reduction in current was 11 ma in 1 hour while in inhibited paste it was 14 ma in 1 hour. The inhibitor has anodic polarization effect and it polarized mild steel by 10 mV whereas the cathodic polarization was less and it polarized mild steel by 6 mV. Thus, the inhibitor is mainly an anodic inhibitor.
INHIBITION OF CALCIUM OXALATE CRYSTALLIZATION IN-VITRO BY VARIOUS EXTRACTS OF HYPTIS SUAVEOLENS (L.) POIT.
Agarwal Kumkum,Varma Ranjana
International Research Journal of Pharmacy , 2012,
Abstract: Hyptis suaveolens (L) Poit. commonly known as Vilayati tulsi, belongs to the Mint family Lamiaceae. The inhibition of in-vitro calcium-oxalate crystal (a major component of most urinary stones) formation by various extracts of Hyptis was investigated by titrimetric method. The inhibitor potency of alcohol extracts of Hyptis suaveolens (L.) Poit was found to be comparable to that of cystone (a proprietary drug for dissolving kidney stones). Thus alcohol extract could be further analyzed in vivo and further characterization of its active compound could lead to the discovery of a new candidate drug for the patients with urolithiasis.
Assessment of difficult laryngoscopy by electronically measured maxillo-pharyngeal angle on lateral cervical radiograph: A prospective study
Gupta Kumkum,Gupta Prashant
Saudi Journal of Anaesthesia , 2010,
Abstract: Background: Difficult airway continued to be a major cause of anesthesia-related morbidity and mortality. Successful airway management depends on direct laryngoscopy and tracheal intubation. Difficult laryngoscopy is a resultant of incomplete structural arrangements during the process of head positioning. Through clinical history,examination of the patients along with craniofacial indices alerts the anesthetist for difficult laryngoscopy. But it does not predict all causes of difficult laryngoscopy during pre-anesthetic evaluation. The maxillo-pharyngeal angle, an upper airway anatomical balance, was proposed for better understanding the pathophysiology of difficult laryngoscopy. In our study we have assess difficult laryngoscopy by electronically measuring maxillo-pharyngeal angles on a lateral cervical radiograph. This angle is normally greater than 100 o . Less than 90 o angle suggests either impossible or difficult direct laryngoscopy when all known craniofacial indices were within the normal range. Cervical radiographic assessment is a simple, economical, and non-invasive predictive method for difficult laryngoscopy. It should be used routinely along with other indices as pre-anesthetic airway assessment criteria to predict the difficult laryngoscopy. Context: Difficulties with airway management continue to be a major cause of anesthesia-related morbidity, mortality, and litigation. Pre-operative assessment of difficult laryngoscopy by the simple and non-invasive radiological method can help to prevent them. Aims: To assess the difficult laryngoscopy pre operatively by a simple and non invasive radiological method by electronically measuring maxillo-pharyngeal angle on a lateral cervical radiograph and it′s correlation with Cormack and Lehane grading. Settings and Design: This is a controlled, nonrandomized, prospective, cohort observation study. Patients and Methods: The 157 adult consented patients of ASA grade I to III of either sex, scheduled for elective surgery under general anesthesia with endo-tracheal intubation, were studied. The patients with identified difficult airway indices were excluded from the study. The maxillo-pharyngeal angle was electronically measured on a lateral cervical radiograph and was correlated with ease or difficulty of laryngoscopy under general anesthesia. Their degree of laryngeal exposure according to Cormack and Lehane classification grade was also noted. Statistical Analysis used: We performed univariate analyses to evaluate the association between the covariates and direct laryngoscopy. Results: In 148 patient
Policy Initiative for Balance Regional Development and Growth  [PDF]
Rajeev Rana
Theoretical Economics Letters (TEL) , 2018, DOI: 10.4236/tel.2018.814188
Abstract: The economics growth and development mostly coined together, and it was thought that growth itself led to development of the country but it was found that there are more dissimilarities than complementary. A higher growth will spontaneously lead development only when there is equitable distribution of resources and balancing regional development. But it did not happen in practices as high growth widen inequality and unequal distribution between the different groups of people in the societies as well between inter-state and intra-state to create regional imbalance, further as there is a transition period of the economy and urbanization took place it was experienced that regional imbalance widen in the term of class difference, gender discrimination (lower participation of women, as well alarming sex ratio), resources distribution, and per capital income. Further, the regional economic disparities create more inequality between savings, investment, and had interconnected map over the vicious cycle of corruption, demographic challenges, influencing chronic & infectious diseases, illicit trade, migration, food insecurity, and governance failures. The paper is addressing those various issues and thrust area of policy initiatives to present the causes of regional imbalance and growth as well the policy initiative for inclusive development.
High-Level Nuclear Wastes and the Environment: Analyses of Challenges and Engineering Strategies  [PDF]
Mukhtar Ahmed Rana
World Journal of Nuclear Science and Technology (WJNST) , 2012, DOI: 10.4236/wjnst.2012.23015
Abstract: The main objective of this paper is to analyze the current status of high-level nuclear waste disposal along with presentation of practical perspectives about the environmental issues involved. Present disposal designs and concepts are analyzed on a scientific basis and modifications to existing designs are proposed from the perspective of environmental safety. A new concept of a chemical heat sink is introduced for the removal of heat emitted due to radioactive decay in the spent nuclear fuel or high-level radioactive waste, and thermal spikes produced by radiation in containment materials. Mainly, UO2 and metallic U are used as fuels in nuclear reactors. Spent nuclear fuel contains fission products and transuranium elements which would remain radioactive for 104 to 108years. Essential concepts and engineering strategies for spent nuclear fuel disposal are described. Conceptual designs are described and discussed considering the long-term radiation and thermal activity of spent nuclear fuel. Notions of physical and chemical barriers to contain nuclear waste are highlighted. A timeframe for nuclear waste disposal is proposed and time-line nuclear waste disposal plan or policy is described and discussed.
New Method for Diagnostics of Ion Implantation Induced Charge Carrier Traps in Micro- and Nanoelectronic Devices  [PDF]
Mukhtar Ahmed Rana
World Journal of Nuclear Science and Technology (WJNST) , 2012, DOI: 10.4236/wjnst.2012.24027
Abstract: An important problem of defect charging in electron-hole plasma in a semiconductor electronic device is investigated using the analogy of dust charging in dusty plasmas. This investigation yielded physical picture of the problem along with the mathematical model. Charging and discharging mechanism of charge carrier traps in a semiconductor elec-tronic device is also given. Potential applications of the study in semiconductor device technology are discussed. It would be interesting to find out how dust acoustic waves in electron-hole plasma in micro and nanoelectronic devices can be useful in finding out charge carrier trap properties of impurities or defects which serve as dust particles in elec-tron-hole (e-h) plasma. A new method based on an established technique “deep level transient spectroscopy” (DLTS) is described here suggesting the determination of properties of charge carrier traps in present and future semiconductor devices by measuring the frequency of dust acoustic waves (DAW). Relationship between frequency of DAW and properties of traps is described mathematically proposing the basis of a technique, called here, dust mode frequency deep level transient spectroscopy (DMF-DLTS).
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