The Role of ZnO and TiO2 in Antimicrobial Bioplastics Based on PLA-Chitosan Abstract The purpose of this study was to develop bioplastics using chitosan-Poly Lactic Acid (PLA), ZnO, and TiO2 to improve antimicrobial properties. In the preparation of the bioplastics, PLA with chitosan-ZnO or chitosan-TiO2 were used. The antimicrobial activity, mechanical properties, thermal properties, and water vapor permeability of bioplastics were evaluated. In general, the addition of ZnO produces better properties compared to TiO2. PLA-ZnO and chitosan have antimicrobial activity against bacteria such as Salmonella typhi, Bacillus subtilis, Escherichia coli, Staphylococcus aureus, yeast such as Candida albicans, and fungus Aspergillus niger. PLA-chitosan-ZnO alloys have the best antimicrobial activity, even though there is no formation of new functional groups of alloys. In comparison to other similar products, these bioplastics have medium tensile strength, tensile modulus, and elongation percentages with low barrier ability to water vapor. The PLA with chitosan and ZnO or TiO2 addition decomposed in a single stage, though the decomposition temperature increases after the addition of PLA. Keywords: antimicrobial properties, bioplastic, PLA, TiO2, ZnO Introduction Petrochemical plastics such as polyethylene…
EVALUATION OF HILTON COMPANY BASED ON PESTLE ANALYSIS OF MARKET ENVIRONMENT INTRODUCTION HILTON HISTORY AND BACKGROUND Hilton worldwide holdings Inc. which was also Hilton Hotel Corporation, is an American based company that manages and franchises several hotels and resorts. It is currently managed and operated by CEO Christopher J Nasseta. The Hotel derived its name from its owner, Conrad Hilton. He first purchased a hotel in Cisco, Texas in 1919 and continued purchasing more hotels in Texas as years passed by. In 1925, Dallas Hilton became the first hotel to bear the name Hilton. In 1946, Conrad and Co formed Hilton Hotel Corporation which became the first hotel company after the World War 2 to sell stock in New York stock exchange. The Hotel took advantage of the political stability after World War 2 to establish themselves since at that time; most customers valued and found it very important in using lodging services. In this case, they flourished rapidly and gained a lot of popularity. . At the time, the country focused on rebuilding its economy after World War 2.…
Environmental Impact Assessment (EIA) Introduction Environmental Impact Assessment (EIA) is a process of evaluating the likely environmental impacts of a proposed project or development, taking into account inter-related socio-economic, cultural and human-health impacts, both beneficial and adverse. There are several problems associated with the current Impact Assessment processes in Hong Kong, and they include such things as lack of sufficient experience, in the availability of expertise in the ministry of Environmental Forestry, lack of experience at the level of Environmental Board because of unavailability of managerial and technical experts. Another reason is that there is no sufficient support from the authorizing body. Possible Problems For the whole process to be complete and successful, there is a need for experience in that the implementation should have started at least early. This is because if the entire process had started as early as possible, the managers of the process would know how to handle things because the negativities would have manifested early. They would have known how to manage them that early and thus by now there would be no much of those negativities…
Environment and Role of Judiciary in Pakistan The Judicial of Pakistan has performed a positive role toward regulating corruption and avoiding to support natural corruption. the extension of the performance out of their traditional purview, the supreme courts have also applied exceptional region, which is presented by the Structure. So region is available to the Tall Court and Preeminent Court under Articles 184(3) and of the Structure. The widespread courts have adopted some cases under this article. These courts have additionally managed various cases of unrestricted schemed in regards to issues of natural law. This outstanding research was operated through the recording of standard petitions and the certificate of objections from concerned residents or civil activists. Various times the courts began a suo moto activity. In this task, the courts have passed immediate orders and arrive judgments on natural themes and have issued appropriate headings concerning the Government. 1.1. Courts The Preeminent Court of Pakistan has continuously looked for to uphold the laws and controls relating to the assurance of the environment. In coming to this conclusion, the…
Figures surrounding the Birth of Venus are in motion, for example, leaves of the orange tree at the background, Zephyr’s blown hair rings, floating roses, gently breaking waves, cloaks, and drapery of the blown figures and lifted by the breeze. Birth of Venus color is pure and light with well refined and precise forms. The nudity aspect of the artwork exalts beauty idealized in the classical style. The two lovers, Zephyrs and Chloris at the sides create a triangle and Venus is in the middle, thus creating a balance in the scene and symbolizes ideals. In my opinion, Botticelli to achieve the esthetics of Neo-Platonism of the time, he reconciled the physical and moral qualities of Venus by making the artwork painting autonomous. He exasperated the plasticity of the figures and expressed a sense of movement by the painting curved lines. The Birth of Venus has a well-defined dark and light contrast that give the Venus a fair complexion. The dark areas emphasize on the Venus realism while the vibrant and bright colors enrich its naturalism. Its central position achieves…
The Benefits of Our 25 Year Solar Panel Warranty Finding an excellent solar panel that can last for quite some good time can be quite challenging. However, at Solar Optimum, we are focused on giving you a 25-year solar panel warranty. Unlike other solar installers, we are as transparent as the daylight, standing behind our PV residential installations – a hundred percent. This is why we are able to offer an unmatched industry-leading 25-year warranty for residential homes on panels, racking, inverter, roof, performance Guarantee, and workmanship. Benefits of our solar panel warranty Workmanship With the knowledge that life is full of surprises, Solar Optimum guarantees its workmanship. This is achieved through assuring that your solar PV installation is clear from any instances of flaws related to materials, components, or labor for 25 years. Performance guarantee The reason as to why Solar Optimum is a 5-star rated solar installer is because we deliver more, mostly on the side of the performance of your solar system. We use the industry’s leading-edge and most trusted tools to monitor and analyze your home…
CUNY SPS SWOT Analysis SWOT analysis is a tool that helps individuals in developing full awareness of a situation. The instrument presents organizations and businesses with a chance to make strategic decisions and plans. The City University of New York School of Professional Studies (CUNY SPS) offers an array of academic programs to students. Notably, the institution provides sports scholarships, internships, and community service programs throughout the city of New York. CUNY SPS faces several opportunities, strengths, threats, and weaknesses in its experience as an educational institution. Strengths CUNY SPS has a positive campus climate. The university has campuses across New York five boroughs, which address the high morale of all stakeholders. Besides, CUNY SPS offers quality services through the collaboration of senior leadership, faculties, and staff improving the well-being of the institution The university provides quality academic programs and student services. CUNY SPS’s mission since 1947 has been to provide accessible and reliable education to learners regardless of their background (CUNY, 2019). CUNY SPS has robust administrative services that support international programs. The university has strong collaborations with bodies…
light pollution and its effects on astronomers at night Henderson, D. (2010). Valuing the stars: On the economics of light pollution. Environmental Philosophy, 7(1), 17-26 Light pollution is extreme, lead astray, or flashy artificial light and is usually brought about by outdoor.Excessive litter of view hasits implication since itfades out the stars twinklein the sky at night. Besides, itaffects astronomicalresearch study, interruptsecosystems; also it has contrary health effects, and it is a waste of energy. Riegel, K. W. (1973). Light pollution: Outdoor lighting is a growing threat to astronomy. Science, 179(4080), 1285-1291. Less than a century ago, one could move outside at night and enjoy watching Milky Way galaxy arch across the night sky even when atthe city. The ability to see thousands of stars as part of a day to day life.Our cultural legacy is fading since we allow artificial lights to flopthe glittery night skies. Also, what could inspire future generationsis losing touch as days go by for allowing light pollution. More than the world population are currently living in towns and cities, making it is difficult to convince…
Credit Cards and Debts Debt Credit card is a tool. “It is a tool in which we buy things we don’t need with money we don’t have at price we can’t afford to impress people we don’t even like.” (Lee 2013). Credit cards are tools that can cause people to waste trillions of dollars around the world. The cards have made it difficult to maintain zero debt. There are secrets that normal consumer people cannot see or understand the consequences of behind the rectangular plastic. A normal individual will see it as borrowed funds with which to pay for goods and services. While an individual with enough knowledge see it as a risk. If people with economical knowledge, see it as a financial risk then why we people still use it. Comparing the risk that these cards can cause and the benefits in terms benefits, believing that credit cards should not exist as many economists do is not a wrong thing. People deserve to know the big risk that they come across by just owning small piece of plastic that…
Companies for Green Thermal Solutions Living in this digital world has necessitated that most things be done digitally. Conserving the environment could be a priority for most people, and people try to manage it. Making the environment clean is made possible by green deposition units that are manufactured these days to serve the function. Soil that is contaminated can be made to regain their state, and that could be interesting to you and the people around you. The companies for the manufacture are different, and finding the best will be a challenge to you if you have not hired them before. The companies can be chosen well if you consider the factors below. First, you have to consider the cost of getting the unit. Different companies will design a unit for energy deposition at a price that will be different from each other. Before you select a company, you can compare them and their services for you to choose the best. Select a company that will be affordable to you when you need them in the services. Ensure you compare…