Extraction of Caffeine from Tealeaves Perez‚ Albert Solomon K.*; Quiambao‚ Marie Angela C;.Pascua‚ Hanna Harriette R.; Patricio‚ Maria Roxanne DC.; 2-Chemistry‚ Department of Chemistry‚ College of Science University of Santo Tomas España St.‚ 1015‚ Manila Abstract Caffeine is soluble in both water and organic solvents‚ solid-liquid extraction and liquid-liquid extraction were used in the experimentation process. Caffeine was extracted using hot water‚ however‚ due to its
Premium Solubility Green tea Tea
DNA Research Paper DNA Structure: DNA (deoxyribonucleic acid) is the code for life; it makes up the genetic material of living organisms. DNA is a long molecule made up of many subunits‚ or monomers‚ called nucleotides. Nucleotides are made up of three parts: a sugar‚ a phosphate group‚ and a nitrogenous base. Nucleotides contain a sugar-phosphate backbone and bases. There are four bases in DNA: adenine‚ cytosine‚ guanine‚ and thymine. A (adenine) always pairs with T (thymine)‚ and C (cytosine)
Free DNA
Extraction of Caffeine from Lipton Yellow Label Teal Leaves Arlie Bamiano‚ Jealine Bernabe‚ Petrenne Caimbon*‚ Jhia Caso Department of Biology‚ University of Santo Tomas Abstract In order to extract pure caffeine from Lipton Yellow Label tea leaves‚ several extractions and phase transition techniques were employed to 6.5029 grams of sample. Initially‚ the tea leaves were boiled in water to extract tea from the leaves (Solid-Liquid Extraction). After extracting the tea‚ several steps of
Premium Caffeine Tea Laboratory glassware
especially that‚ DNA barcoding has been developed. DNA barcoding is an important tool in categorizing the taxa of different species and it tells so much about the species’ traits‚ including genetic diversity. The Pomacea canaliculata was introduced in different parts of Asia and had been an invasive species and a pest in different ecosystems ever since the introduction. In understanding this species of snails‚ samples were collected‚ DNA’s were extracted‚ undergone PCR and electrophoresis‚ and was sequenced
Premium DNA Population genetics Genetics
DNA is a tool of great use throughout the world. Especially when it comes to the field of forensic science‚ DNA is the most important tool of all. What is DNA? DNA‚ short for deoxyribonucleic acid‚ is a group of molecules that hereditary information in which guides development and functioning throughout the body. “DNA is to justice as a telescope is to the stars; not a lesson in biochemistry‚ not a display of the wonders of magnifying glass‚ but a way to see things as they really are.”(Barry Scheck
Free DNA
The Impact of DNA on Criminal Investigations Science has become a very valuable tool for law enforcement. scientific evidence is used every day in criminal and civil courts throughout the United States; helping to Solve particularly difficult cases where all other investigative techniques have failed‚ provide clues where there are no witnesses‚ reduce the number of wrongful arrests‚ increase the reliability of evidence. Link together cases that otherwise could not be connected‚ such as local
Premium DNA DNA profiling
Title: Feasibility of Calamansi Fruit (Citrofortunella microcarpa) As a Natural Anti-Dandruff Hair Gel Chapter I: Introduction Background of the Study: Rutaceae is a genus of plants with more than 160 species. It is also known as citrus family. Calamansi is one of the species of Rutaceae. The plant is characterized by wing-like appendages on the leaf stalks and white or purplish flowers. Its fruit has either a spongy or leathery rind with a juicy pulp that is divided into sections
Free Citrus
7.1.1 Describe the structure of DNA‚ including the antiparallel strands‚ 3’-5’ linkages and hydrogen bonding between purines and pyrimidines. DNA is made up of two strands. At one end of each strand there is a phosphate group attached to the carbon atom number 5 of the deoxyribose (this indicates the 5’ terminal) and at the other end of each strand is a hydroxyl group attached to the carbon atom number 3 of the deoxyribose (this indicates the 3’ terminal). The strands run in opposite directions
Premium Protein DNA Amino acid
Anne Holt DNA Profiling Introduction: DNA Profiling was authorised in the mid- 1980s. DNA is short for deoxyribonucleic acid. DNA accommodates a genetic code for each organism. DNA profiling is not just used for identifying fingerprints and such‚ it is also used for identifying any type of evidence that has DNA in it. Auspiciously‚ each DNA is unique‚ not even siblings have indistinguishable DNA‚ unless they are identical twins. USES OF TECHNIQUE: DNA profiling is used most often to solve crime
Premium
Abstract This work describes the extraction of caffeine from tea leaves to determine its % caffeine. The extraction process selectively dissolves one or more compounds in a mixture into an appropriate solvent. In this experiment‚ it was visible in the process wherein the components of the tea leaves were dissolved in two solvents‚ water and dichloromethane (DCM)‚ with DCM used for multiple extractions. The organic layer was evaporated and the determined % caffeine was 0.12%. Furthermore‚ the purified
Premium Tea Caffeine Solubility