Bacteria Classification By Gram Staining THE AMERICAN UNIVERSITY IN CAIRO BIOLOGY DEPARTMENT SCIENCE 453 : BIOLOGY FOR ENGINEERS REPORT No.1 Presented By : Karim A. Zaklama 92-1509 Sci. 453-01 24/2/96 Objective: To test a sample of laboratory prepared bacteria and categorise it according to Christian’s gram positive and gram negative classes and also by viewing it under a high powered microscope and oil immersions; classify its shape and note any special characteristics. Introduction: Bacteria
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but diversely distinctive by the specific way they accomplish that means‚ hence all the different classifications. It was in the year of 1888 that the studies of two German scientists‚ Hellriegel and Wilfarth‚ proved that it was the root nodule bacteria that provided nitrogen to their host plants. The next year‚ Frank (1889) published the nodular symbiont under the name Rhizobium leguminosarum‚ and it has remained to this day. These studies brought to light the importance of rhizobia and leguminous
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be similar to the pictures below. (In these examples‚ the time after plating is different for the two samples‚ so be aware that the colonies in these photos are different sizes for a reason.) We will culture our bacteria for about 2-7 days. Characteristics are most visible if the bacteria are examined using a stereoscopic scope. E. coli Shape (form): circular Margin: entire Elevation: raised Size: punctiform‚ small Texture (surface): smooth Appearance: shiny Pigmentation: nonpigmented (colorless)
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Answer Sheet: How are microscopic protest and fungi classified? (2 pages) | |Scientific Name |Classification |Habitat |Nutrition |Locomotion | | | |Group | | | | |Organism B |Penicillium |Fungus |Citrus fruit |Organic matter
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This is because gold is very resistant to bacteria. Bacteria are microscopic single-celled organisms. Bacteria are prokaryotes‚ meaning the entire organism consists of a single cell with a simple internal structure. The DNA of a prokaryote is neatly packed in the nucleus. The bacterial DNA floats freely in a twisted threadlike mass called the nucleoid. Gold is unaffected by almost everything. The only materials that can affect gold are man-made. Since bacteria are a natural organism‚ it cannot react
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Application of lactic acid bacteria There are four major categories for the current uses and applications of LAB: food‚ cosmetic‚ pharmaceutical‚ and chemical applications. In food industry Recent years the interest increased in using LAB by using bacteriocin-like inhibitory substances (BLIS) because of their potential use as a natural antimicrobial agent to enhance the food safety of food products and increase the nutritional values of the food. Foods that fermented by LAB such as cheese
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Top 20 Most Active Viruses Conficker.C • Conficker.C is a worm. Designed to spread by exploiting a vulnerability in the Windows Server Service which allows remote code execution. It is the vulnerability MS08-067. • It disables the following services: • Windows update‚ disabling the Windows updates. • BITS (Background Intelligent Transfer Service)‚ which is a service to transfer Windows files. • Error reporting service‚ which allows to send Microsoft information about errors occurring in the
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Presented by: Srihadi W.Zarkasyi Introduction The growth in environmental accounting research and intersest in the last few years has been little short of phenomenal.For those of us with a long-standing interest in such issues‚ it is easy to get swept along in the euphoria of seeing environmental issues brought to centre stage in business and accounting debates. Little more than decade ago‚ any scholar wishing to review the literature concerned with accounting and the natural environment would
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Identification and Impact of Airborne Fungi over the Sydney Basin Introduction The need to identify and monitor airborne fungi is vital to the health of humans. Fungal spores may trigger allergic responses in sensitised people‚ causing respiratory diseases such as hayfever and asthma (Knox‚ Ladiges‚ Evans and Saints 2006). A variety of techniques can be used to identify the diversity and density of fungi within the Sydney Basin. The use of agar plate exposure allows microbial colonies to
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INTRODUCTION The enzyme catalase converts hydrogen peroxide (H2O2) to water and O2. The evolution of O2 causes bubbling. Thus‚ catalase-positive organisms that are mixed into hydrogen peroxide will cause bubbling (catalase-negative organisms will not). This test is good for distinguishing between Gram-positive cocci in chains (catalase negative) versus Gram-positive cocci in clusters (catalase positive). The coagulase test is used to differentiate Staphylococcus aureus from coagulase-negative
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