NITROGEN CYCLE IN SURFACE WATER BODIES by: yusra shamsudin 1.0 Nitrogen Nitrogen is very essential to all living matters especially to plant‚ animal and human. The source of nitrogen is from the atmosphere and it is exists as a molecule composed of two atom of nitrogen that is bonded together by triple bond. Figure 1: Nitrogen Source: anyone4science.blogspot.com 2.0 Nitrogen Cycle Nitrogen cycle is the transformation of nitrogen from one form to another. For living organism
Premium Nitrogen Ammonia
Shantelle Johnson April 8‚ 2012 H4 Introduction When food is unsafe for consumption is called food contamination. Food contamination occurs when foods are spoiled because they might contain microorganisms‚ such as bacteria ‚ parasites‚ or toxic substances that make them unsafe for consumption.Bacteria and parasites on uncooked food can linger on the food if not handle or cooked properly. Food contamination is serious because it results in diseases that affect appromiaxally seventy-six million
Premium Foodborne illness Escherichia coli Bacteria
------------------------------------------------- The Processes of the nitrogen cycle Nitrogen fixation Atmospheric nitrogen must be processed‚ or "fixed" (see page on nitrogen fixation)‚ in order to be used by plants. Some fixation occurs in lightning strikes‚ but most fixation is done by free-living or symbiotic bacteria. These bacteria have the nitrogenase enzyme that combines gaseous nitrogen with hydrogen to produce ammonia‚ which is then further converted by the bacteria to make their own organic
Premium Nitrogen Ammonia
The role of bacteria in the soil Bacteria in the soil play key role in recycling matter in to useful nutrients which can be used by growing plants. This process of recycling matter in the soil by living organisms is called biogeochemical cycle. Bacteria are improving plants growth in other ways too‚ for example bacteria‚ such as Rhizobium‚ are in symbiotic relationship with the root system of some terrestrial plants. The most important elements‚ which allow terrestrial plants grow well‚ are
Premium Nitrogen Ammonia Metabolism
bacteria is very resistant to antibiotics‚ and it can lead to sepsis and infection of other body organs‚ another cause is when cultures of infected tissue show a mixture of nonanaerobic bacterial types such as Escherichia coli‚ Klebsiella‚ and Clostridium is a cause if gas is found in the infected tissue. Investigators have concluded that tissues damaged by nonanaerobic to a great extent lead to hypoxia which is a
Premium Bacteria Immune system Infection
gastroenterologist. They can perform a variety of tests that include “complete blood count (CBC)‚ erythrocyte sedimentation rate (ESR)‚ C-reactive protein (CRP)” (Riley Children’s Health 1) which are blood tests. “Hemoccult‚ calprotectin‚ culture‚ clostridium difficult (C.diff)” (Riley Children’s Health 1) which are stool tests. “Small bowel barium x-ray‚ ultrasound‚ computed tomography (CT) scan‚ magnetic resonance imaging (MRI) which are a variety of imaging studies (Riley Children’s Health
Premium Crohn's disease Ulcerative colitis Gastroenterology
are introduced to the products (Hossain et al.‚ 2010; Thi et al.‚ 2013). It has been found that the initial biota of herring fillet are dominated by Shewanella putrefaciens and Pseudomonas species. In addition‚ E. coli‚ Staphylococcus aureus and Clostridium perfringens have been identified from raw frozen seafood. A prevalence study of Aeromonas on catfish in a processing plant showed the predominance of Aeromonas and Pseudomonas spp.‚ Staphylococcus aureus‚ faecal coliform‚ E. coli and Salmonella
Premium Bacteria
Microbial Mechanisms of Pathogenicity Mechanisms of Pathogenicity • Pathogenicity: • Virulence: Mechanisms of Pathogenicity Figure 15.9 Portals of Entry • Mucous membranes • Skin • Parenteral route Numbers of Invading Microbes • ID50: Infectious dose for 50% of the test population (animals) • Dose of pathogen that will infect half of the test animals • LD50: Lethal dose (of a toxin) for 50% of the test population (animals) • Dose of toxin that will kill half of the test
Premium Bacteria Protein
neurotoxin‚ generically called botulinum toxin‚ produced by the bacterium Clostridium botulinum (and rarely by C. butyricum and C. baratii). There are seven distinct neurotoxins (types A-G) that Clostridium botulinum produces‚ but types A‚ B‚ and E (and rarely F) are the most common that produce the flaccid paralysis in humans. The other types mainly cause disease in animals and birds‚ which also develop flaccid paralysis. Most Clostridium species produce only one type of neurotoxin; however‚ the effects
Premium Diabetes mellitus Meningitis Hypertension
The variola virus comprises of double-stranded DNA and has an intricate structure. Another toxin includes botulinum toxin. Botulinum toxin is one of the most deadly substances known to humanity; it is a neurotoxin generated from the bacterium Clostridium botulinum. The toxin interferes with neurotransmission of the brain‚ causing paralysis throughout the body. Botulinum is also used clinically‚ but is very unstable; more information is needed about the toxin in order to move further in advancements
Premium Biological warfare