Sökning: "polyethylene"

Visar resultat 31 - 35 av 196 uppsatser innehållade ordet polyethylene.

1. 31. Removal Characteristics of Fibrous and Particulate Microplastics : A Study of the Effectiveness of Coagulation-Flocculation- Sedimentation

   Master-uppsats, Uppsala universitet/Institutionen för geovetenskaper

   Författare :Amrith Kumar; [2022]
   Nyckelord :Coagulation; flocculation; jar test; microplastics; sedimentation; water treatment; Burktest; flockning; koagulering; mikroplaster; sedimentering; vattenrening;

   Sammanfattning : The rapid proliferation of microplastics (MPs) over the last few decades have raised alarms about the major environmental and health impacts posed by this anthropogenic source. The widespread propagation and transport of MP particles in water sources have accelerated the need to study the eco- toxicological impacts as well as the efficacy of various removal mechanisms from these critical water sources. LÄS MER

3. 32. Influence of starch botanical source on aqueous two-phase system phase behavior and starch microspheres preparation

   Master-uppsats, Lunds universitet/Livsmedelsteknik och nutrition (master)

   Författare :Denis Oskolkov; [2022]
   Nyckelord :starch microspheres; acid hydrolysis; DSC; microscopy; potato; barley; corn; pharmaceutical technology; Technology and Engineering; Chemistry;

   Sammanfattning : Background: Starch is a well-studied material, produced by plants in granules to store energy. Starch finds a lot of applications in day-to-day life, in the food and pharmaceutical industry. LÄS MER

4. 33. Improving maintenance scheduling with condition monitoring on the electric distribution grid : An economic analysis comparing corrective and predictive maintenance

   Master-uppsats, KTH/Skolan för elektroteknik och datavetenskap (EECS)

   Författare :Hugo Vincenti; [2022]
   Nyckelord :Condition-based maintenance; predictive maintenance; health index; failure rate; maintenance scheduling; sensors; economic analysis; simulation; Tillståndsbaserat underhåll; förebyggande underhåll; hälsoindex; felfrekvens; underhållsplanering; sensorer; ekonomisk analys; simulering.;

   Sammanfattning : A growing use of sensors on the electric grid has opened the door to new methods of asset management: Distribution System Operators are now looking into conditionbased maintenance, as opposed to the traditional corrective or time-based methods. As an emerging field, the methodology must be constructed from the ground, with the little data available. LÄS MER

5. 34. Evaluation of using bioplastics for lab consumables

   Kandidat-uppsats, Uppsala universitet/Institutionen för materialvetenskap

   Författare :Lovisa Mäepea Nilsson; Emelie Gunnarsson; Sara Mardini; Fartun Nuur Yusuf; Jesper Nyström; [2022]
   Nyckelord :bioplastics; Biotage; sustainability; green washing; biopolymers; PLA; bio-based; environment; PHA; PP; PE; chemical properties; bioplaster; hållbarhet; bio-polymerer; bio-baserad; miljövänlig;

   Sammanfattning : The use of plastic has increased markedly in recent years which has led to more fossil fuels being used and more plastic in nature. This is a literature study that researches on how bio- based plastics can be used instead of plastics made from fossil fuels. LÄS MER

7. 35. Study of hole mobility in amorphous polyethylene via kinetic Monte Carlo methods

   Master-uppsats, KTH/Matematik (Avd.)

   Författare :Hannes Aspåker; [2022]
   Nyckelord :;

   Sammanfattning : This thesis presents a study of hole mobility in amorphous polyethylene using kinetic Monte Carlo (KMC) methods together with a novel chain segmentation model developed by Unge and Nilsson, which determines hole localization sites based on torsion angles along the polymer chain. An extension to the KMC algorithm was developed which improves performance by modelinground-trips between strongly interconnected localization sites. LÄS MER