Theodor Wilhelm Engelmann was a German microbiologist whose 1882 experiment measured the effects of different colors of light on photosynthetic activity and showed that the conversion of light energy to chemical energy took place in the chloroplast. In 1881‚ he observed the movement of bacteria towards the chloroplasts in a strand of “Spirogyra” algae. Engelmann hypothesized that the bacteria were moving in response to oxygen generated by the photo synthetically active chloroplasts in the algae.
Premium Photosynthesis Oxygen
Ch. 1 Prokaryotes = bacteria ‚ archaea Eukaryotes = Fungi‚ protozoa ‚ algae (Growth:: Mitosis有絲分裂) Bacterial cell → Bacillus(rodlike) ‚ cocus (spherical)‚ spiral (curved) *P.S. 有時會star-shaped or square → 出現既形式: pairs‚ chains‚ clusters cell walls of bacteria → peptidoglycan (carbohydrate & protein complex) cell walls of plant and algal cell → cellulose Growth::Binary fission = bacteria reproduce by dividing into two equal cells bacteria 吸收nutrients from dead / living organisms/ photosynthesis
Free Bacteria
* Microbiology: Study of microorganisms Most microorganisms are pathogenicFalse The majority of bacteria are harmless True Total number of bacterial species: about 10 million to a billion What is a microorganism? An organism or virus too small to be seen without a microscope. (Smaller than 0.5 mm) Ex: Bacteria‚ Fungi‚ Protozoa‚ Algae‚ and Viruses Microbiom: collection of microbes Human cells vs. Microbial cells = 1:10 Which statement about Michaelangelo is not correct? A. He was
Premium Microscope Electron Microbiology
Service - Our Responsibility Water and Sewerage Authority (WASA) was established by an Act of Parliament in 1965 to manage the water and sewerage sector of Trinidad and Tobago. An essential component of this mandate is the delivery of a safe‚ reliable and efficient water supply to satisfy the demand of all sectors of the economy. Whilst over the ensuing years there has been a steady increase in demand‚ there has not been the commensurate investment in infrastructure and the identification of alternative
Premium Orthography Phoneme
MATERIAL SAFETY DATA SHEET (MSDS) FOR PORTLAND CEMENT (Complies with OSHA and MSHA Hazard Communication Standards‚ 29 CFR 1910.1200and 30 CFR Part 47) CEMEX‚ INC. CEMEX CALIFORNIA CEMENT LLC VICTORVILLE CEMENT PLANT 16888 NORTH "E" STREET VICTORVILLE‚ CALIFORNIA 92394-2999 Section 1 - IDENTIFICATION Supplier/Manufacturer Emergency Contact Information CEMEX‚ Inc. CEMEX California Cement LLC Victorville Cement Plant 16888 North "E" Street Victorville‚ California 92394-2999
Premium Cement Concrete Portland cement
Review Questions 1. Which type of S. pneumoniae strain is the most virulent‚ encapsulated or unencapsulated? 2. What allows S. pneumoniae to adhere to cell walls‚ phosphorylcholine or polysaccharide? 3. Which infections are most commonly caused by S. pneumoniae‚ arthritis & peritonitis or meningitis & bacteremia? both 4. What can society do to help protect itself from antimicrobial resistance‚ increase or decrease antimicrobial usage? Decrease usage 1. Staphylococcus aureus‚
Premium Streptococcus Bacteria Dengue fever
Increasing evidence suggests that the alarming rise in allergic and autoimmune disorders during the past few decades is at least partly attributable to our lack of exposure to microorganisms that once covered our food and us. As nature’s blanket‚ the potentially pathogenic and benign microorganisms associated with the dirt that once covered every aspect of our preindustrial day guaranteed a time-honored co-evolutionary process that established “normal” background levels and kept our bodies from overreacting
Free Immune system Bacteria Allergy
Open Reading Frames * (ORFs) are regions with no stop codons. All genes reside in long open reading frames * Note that stop codons in other reading frames have no effect on the gene. * Can be searched in the genome sequence. Valid only for prokaryotes and lower eukaryotes. Protein Sequencing vs. DNA sequencing * We compare protein sequences‚ not DNA‚ because protein is more conserved in evolution than DNA * The organism’s survival depends on the protein being
Free DNA Protein Gene
you in trouble. This is especially true in Microbiology. The techniques you will be learning tonight‚ if mastered correctly‚ will make your life and learning experience in Microbiology much easier‚ if you don’t pay attention and practice these techniques incorrectly‚ well then……? Today you will be learning the following techniques: 1. Streak plate method for colony isolation 2. Aseptic transfer techniques First the streak plate methods. In Microbiology it is often necessary to isolate pure colonies
Free Bacteria Staining Gram staining
Contributors to Microbiology Pioneers of Microbiology I. Antonie van Leeuwenhoek (Oct. 24‚ 1632- Aug. 30‚ 1723) A. In 1676 Leeuwenhoek saw tiny organisms in water‚ he was the first man to observe and describe bacteria accurately. He discovered microscopic nematodes‚ blood cells and sperm. He also made over 500 microscopes to view specific objects. B. Microbiology is concerned with the study of all forms of life that are too small to be seen with the naked eye. Antonie’s work
Premium Bacteria Microbiology Microorganism