C. Central Composite Design As PBD considers only main effects and ignores the interactions among the factors‚ therefore‚ a new design is required. Central composite design (CCD) is type of experimental design‚ which was first described by Box and Wilson (1951). Nowadays it is widely used in response surface methodology (RSM; discussed in the next section of the review) for building a second order (quadratic) model for the response variable without using a complete three-level factorial experiment
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as a good alternative to traditional food preservatives. The addition of just a little drops of cinnamon essential oil to 100 ml approximately 3 ounces of carrot broth which was then refrigerated can prevent the growth of the foodborne pathogenic Bacillus cereus for at least 60 days in a study that is published in August 2003 issue of the
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had the following morphology on a streak plate: medium sized butyrous cream colored colony. Gram-staining was utilized as a first step to differentiate between gram-positive and gram-negative. After determining that it was a Gram negative single bacillus‚ biochemical tests performed and their purpose and results are shown in table and flow chart form. Table 1: biochemical Test Results Test | Purpose | Reagents | Observations | Results | Gram stain | To determine the Gram reaction of the bacterium
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THE UNIVERSITY OF NEW SOUTH WALES SCHOOL OF CHEMICAL ENGINEERING FOOD2320 Food Microbiology FOOD2627 Food Microbiology Final Examination November 2013 Time allowed: THREE (3) hours Total number of questions: THREE (3) Answer all three questions Total marks: 60 All questions are of equal value (20 marks) This exam will contribute 40% to the final mark for the subject This paper may be retained by the candidate Answers must be written in ink. Except where they are expressly required
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of administration. Objectives of EPI: To reduce morbidity and mortality rates among infants and children from six childhood immunizable disease\ Administration of vaccines Vaccine | Content | Form & Dosage | # of Doses | Route | BCG (Bacillus Chalmette Guerin) | Live attenuated bacteria | Freeze driedInfant- 0.05mlPreschool-0.1ml | 1 | Intradermal | DPT (Diphtheria Pertussis Tetanus) | DT- weakened toxinP-killed bacteria | liquid-0.5ml | 3 | Intramuscular | OPV (Oral Polio Vaccine)
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infections. However‚ others are beneficial such as Penicillium which produces the antibiotic penicillin and Saccharomyces is the yeast used to make bread rise and to brew beer. Many bacteria are dangerous pathogens such as Salmonella (food poisoning)‚ Bacillus anthracis (anthrax)‚ MRSA responsible for many serious infections. Nevertheless not all bacteria cause diseases. Lactic Acid bacteria enhance health and protect us against pathogens and carcinogens. There are many different types of bacteria in our
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gyMicrobiology: is a study of microorganisms (microbes‚ germs) and their activities Microorganism: An organism or a virus too small to be seen without a microscope (smaller than 0.5mm) Misconceptions of Microorganisms * All microorganisms are pathogenic (disease producing) FALSE * The majority of bacteria are harmless and beneficial TRUE Aspects of microbiology * Basic biological science * About living cell and how they work * About microbial diversity and their evolution
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substrate concentration‚ enzyme concentration‚ temperature and pH on hydrolysis and solubilization of corn gluten as well as enzyme stability. The corn gluten was hydrolyzed by Alcalase enzyme (a bacterial protease produced by a selected strain of Bacillus licheniformis) that was chosen among five commercial enzymes examined. The optimum process conditions for hydrolysis and solubilization were obtained as 30 g L–1 substrate mass concentration‚ 2.5 mL L–1 enzyme concentration‚ 55 °C and pH 8. Under
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Measles: is an infection of the respiratory system caused by a virus‚ Symptoms: include fever‚ cough‚ runny nose‚ red eyes and a rash. Measles: is spread through respiration‚ the contact with any infected person in any way‚ including sex‚ saliva‚ or mucus‚ can cause infection making it highly contagious. It lasts from two to four days prior‚ until two to five days following the onset of the rash. Signs: and symptoms of measles include four-day fevers and the three Cs — cough‚ coryza (head cold)
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Year Author Study Population Research Design Statistical Treatment Brief conclusion Limitation/Biases 2007 Eliana Ferreira Ozela‚ Paulo César Stringheta‚ and Milton Cano Chauca Anthocyanin in spinach vine (Basella rubra) fruits Experimental t-test In conclusion‚ the pigment extracted from the fruits of spinach vine (B. rubra) was more stable at pH 5 and pH 6. Increases in temperature and the presence of light affected the stability of this pigment. Results demonstrate that this pigment exhibits
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