Infrared spectroscopy

cooling to 25°C to erase the thermal history, then a second heating was made to 200°C. Heating and cooling rate was always of 10°C/min under nitrogen flow of 40 ml/min. The functional groups of PLA and LA can be analyzed by Fourier Transform Infrared Spectroscopy…

2.1. Biocellulose definition Cellulose is the main component of plant cell wall. Some bacteria produce cellulose (called biocellulose or bacterial cellulose). Plant cellulose and bacterial cellulose have the same chemical structure (Fig.2.1), but different chemical and physical properties (Lin et al., 2016). The molecular formula of bacterial cellulose (C6H10O5)n is the same as that of plant cellulose, but their chemical and physical features are different. Biocellulose is preferred over the…

PERIODONTOLOGY LLLT stimulates fibroblasts for faster regeneration of soft tissue, while providing analgesia and a modulation of the inflammatory chemicals that cause pain and discomfort. LLLT when used in conjunction with surgical lasers for treatment such as gingivectomy, periodontitis and periodontal surgery, have shown great promise in achieving improved clinical outcomes. A 2006 study12 showed a statistically significant decrease in pocket depth at 21 and 28 days postsurgery. Moreover,…

in pH meters • Infrared windows where it can be used in contact with many aqueous solutions e.g. in FTIR spectrometers, in which case it can be an alternative to KBr, which is attacked by water. Materials and Experimental Procedure A stock solution was prepared using 99…

Introduction During the summer term, I held a Co-op position as a Research Assistant at Saint Mary’s University in the Chemistry Department. I was under the supervision of Kathy Singfield and Samuel Veres with the direct supervision by Brendan Grue. Objectives Objectives that we set prior to the start of my work term included assisting in the development of chemical methods involved in crosslinking, assisting in the investigation of the role of various factors including chemical additives.…

Critical illness in children may have an impact on long-term outcome. Over a three year period (Jan 2010 - December 2012), 57,949 children were admitted across 30 paediatric intensive care units (PICU) in the UK. Although outcomes are improving the number of admissions is increasing.\cite{Network:2013tj} There is a need for research into the most common therapeutic interventions instigated in paediatric intensive care. Supplemental oxygen is one such strategy. Oxygen is usually administered in…

3. Results and discussion 3.1. Grafting of CNT on the ramie fabric The schematic representation for the mechanism of ramie fiber surface treatments is shown in Fig. 2. For the alkali treatment of ramie fiber, the NaOH reacts with the hydroxyl groups of the ramie fiber as shown in Fig. 2(a). During silane treatment, the hydrolysis of silane takes place initially (Fig. 2(b)) which then reacts with the active hydroxyl functionalities in ramie fiber (Fig. 2(c)). Each silane molecule has three…

nanoparticles (Au NPs) were synthesized by standard citrate reduction method. Au NPs and PPy-Au NCs were characterized by Transmission Electron Microscopy (TEM), Atomic Forced Microscopy (AFM), Scanning Electron Microscopy (SEM), Fourier Transform Infrared Spectroscopy (FTIR) and X-ray diffraction (XRD) techniques for morphological and structural confirmations. The dc- electrical conductivity of PPy-Au NCs was tested by two probe method. The electrical conductivity of…

Animal-Assisted Therapy as a Supplemental Treatment for Seasonal Affective Disorder Patients Ivey McCartney The University of Georgia Animal-Assisted Therapy as a Supplemental Treatment for Seasonal Affective Disorder Patients While some people may enjoy the crisp air and shorter days that accompany the fall and winter months, there are many who develop an annual occurrence of depression during these months. This disorder is known as seasonal affective disorder, or SAD. The disruption of…

Brain Science will Change Communication Mode Communication has long been a significant issue. Although human has created language to help they get the mind of the others and the Internet makes transmitting information faster and more convenient, communication is still imperfect. For example, it is almost impossible for one to share feelings, image and memory in their mind integrally. Actually, people have to use literature,music and many other forms of expression to express themselves. But…