Studies of the effect of structural variation on Mesomorphic Characteristics in Thermotropic Mesogenes

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Prediction of Properties and Modeling Fire Behavior of Polyethylene Using Cone Calorimeter

Fire behavior of pure polyethylene has been investigated by performing thermal analysis using a standard cone calorimeter. Specifications of polyethylene samples were 100 � 1 mm long, 100 � 1 mm wide and 5 mm thick, with mass of 25.0 � 0.1 gm. Sample surface area exposed to the external heat flux was limited to 94 mm in length, 94 mm in width due to use of edge lip sample holder frame. The values of external heat flux used were ranging from 40 - 55 kW/m2 with an incremental step of 5 kW*m-2. Three set of experiments were performed for each value of external heat flux. The results obtained were recorded and fitted to a set of mathematical equations to determine the thermal inertia, critical heat flux and the peak heat release rate. Study shows that thermal inertia value obtained from experimental data was 0.86 kJ2*m-4*K-2*s-1 and from well-known correlations was 0.83 kJ2*m-4*K-2*s-1 with a difference of 3.49 %. The factors to relate the observed critical heat flux with the actual critical heat flux were determined as 0.77 and 0.64. The peak heat release rate for each test was determined using the model equation based on oxygen depletion index and concentrations of gaseous species such as oxygen, carbon monoxide, carbon dioxide and water. The values observed experimentally and the ones calculated had a standard deviation of �4.56 %. Thus, this thesis serves as basis for transformation of qualitative understanding of polyethylene fire behavior into systematic quantification which can be generalized for other polymers and their composites.Chemical Engineerin

Rare Earth Element Recovery from Phosphogypsum using a Biolixiviant

This project describes the process of recovering of rare earth elements (REE) from phosphogypsum (PG) waste using a novel biolixviant produced by a bacteria strain known as Glucanobacter oxydans and is inspired by novel research occurring at Idaho National Laboratories. This report details design of a plant which has the capacity to produce the biolixiviant through fermentation, use this biolixiviant to leach REE from a solid waste such as PG, and recover the REE in oxide form through crystallization, filtration, and subsequent high temperature decomposition. The plant has the capability of processing nearly 1 million MT of PG a year and yields 286,000 kg of a rare earth oxide (REO) mixture, valued at approximately $9 per kg. As it stands, this process is unprofitable: it has a negative internal rate of return after 15 years of production and has a NPV of negative$147,664,900. In its third year of production, operating at 91% capacity, the plant has a -21.17% ROI. An alternative design is considered where fermentation is cut and H2SO4 is the lixiviant, removing 79% of the original capital necessary to create the plant. Though still negative, the IRR/ROI are much more sensitive to changes in product price, thus opening a potential path to profitability in the near future as prices are expected to increase

Plants Alkaloids Based Compound as Therapeutic Potential for Neurodegenerative

Although while getting a restful night\u27s sleep is essential for your mental and physical health, insomnia is very prevalent. More people are turning to complementary and alternative therapies to treat or prevent sleeplessness. For hundreds of years, herbal treatments like valerian, passionflower, lemon balm, lavender, and California poppy have been utilized successfully. After using these herbal medicines, sleep latency was reduced and subjective and objective measures of sleep quality improved. Their sedative and sleep-inducing effects are caused by interactions with several neurotransmitter systems in the brain, according to molecular research. The plant species can be divided into 76 different genera and 32 different families, with the Asteraceae (24.2%) and Lamiaceae (21.1%) being the most prevalent subgroups. Leaves (29%) and flowers (27%), respectively, are used to make the majority of infusions (70%) and decoctions (25%). Just the most well-known taxa—out of the 106 known—are treated here (A. arvensis L., C. nepeta L., C. monogyna Jacq., H. lupulus L., L. nobilis L., L. angustifolia Mill., M. sylvestris L., M. chamomilla L., M. officinalis L., O. basilicum L., P. rhoeas L., P. somniferum L., R. officinalis L., T. platyphyllus Scop., and V. officinalis L.). Further study is required to confirm the therapeutic potential of these substitutes and define the mechanism of action of bioactive compounds because only seven of the fifteen species chosen have been investigated for pharmacological activity as hypnotic-sedatives

A randomized clinical study to assess the performance of a marketed denture adhesive in a model of food infiltration in healthy, edentulous adults

ACKNOWLEDGMENTS The authors wish to thank David Shaw and Audrey Souverain, previously of GSK Consumer Healthcare, for statistical analysis and advice. Editorial assistance with the preparation of manuscript drafts was provided by Eleanor Roberts of Beeline Science Communications Ltd., funded by GSK Consumer Healthcare, now known as Haleon.Peer reviewedPublisher PD

Breast Cancer Treatment Relying on Herbal Bioactive Components

Use of herbs and plants in cooking and medicinal dates back thousands of years. In this overview, we look at the many plant species that still have immune-boosting and cancer-fighting properties. Carotenoids, flavonoids, ligands, polyphenolics, terpenoids, sulphides, lignans, and plant sterols are only some of the many active phytochemicals found in different types of herbs. There are a number of mechanisms through which these phytochemicals exert their effects. They either prevent cell division or stimulate the synthesis of a protective enzyme such as glutathione transferase. The cancer-fighting and cholesterol-lowering effects of mevalonate are counteracted by the volatile oils and plant extracts from various herbs and plants