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high school fermentation lab introduction lab report
high school fermentation lab introduction lab report
introduction on fermentation
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What is fermentation? In biochemical term, Standbury (1984) defined fermentation as the catabolism process of organic compound which generate energy. This fermentation process has been used in a lot of fields, such as food preservation, biomass, enzyme production, waste management, antibiotics etc. it is true that nowadays, fermentation products cannot be separated with our life, especially fermented food. The development of fermentation industry started before 1900 with the production of fermented beverages and food (Standbury, 1984). Some famous products of fermentation products are bread, cheese, yoghurt, and many more.
Law, Abu Bakar, Mat Hashim, and Abdul Hamid (2011) concluded that fermentation is one of the oldest and widely used food preservation methods in households, small-scale food industries as well as in large enterprise. Fermented foods generally preserved pleasant flavor, aroma, texture, enhanced nutritive values and good keeping quality under ambient conditions. (p.1)
Further, fermented food itself is interpreted by Campbell-Platt (1987) “as those foods which have been subjected to the action of micro-organisms or enzymes so that desirable biochemical changes cause significant modification to the food.” (As cited in Sahlin, 1999, p.5)
Countries in eastern Asia are famous with a variety of traditional food fermentation products. For instance, Korea with their kimchi, Japan with natto, china with soy sauce, and paneer from India. In Southeast Asia, particularly Malaysia, tapai, tempeh, jeruk, budu, cincalok, and tempoyak are really well known as the local fermented food products.
Malaysian Fermented Products
As mentioned previously, Malaysia has a lot of local fermented food products. The substrat...
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...-harvest losses. Fish fermentation is a promising way to reduce post-harvest losses in fishing industry (Ismael, nd). Budu, cincalok and belacan are the example of marine fermented product in Malaysia. However, the production of these products is still limited. Most of the fish fermented industries in Malaysia are still in the small scale and traditional.
At present, the market of the Malaysian fish fermented products remains to fulfill the local demand. As comparison, Thailand is reported to be the largest fish sauce exporter in the world with more than USD $13 million to US, Japan and Australia export annually (Brillantes, 1999 as cited in Sim, Chye, Anton, nd). Sim et al. (nd) proposed that the limitation of the local Malaysian fish sauce producer is due to the long fermentation time, limited technology and skill which cause low quality control of the products.
Ethanol Fermentation: the process of chemically breaking down bacteria/yeast in an anaerobic environment, which in turn releases CO2.
The name for the process of fermentation comes from ‘fervere’, the Latin word meaning “to boil”. Early observers of the process assigned this name to it because as fermentation occurred in barrels containing crushed grapes, being used to create wine, bubbles were produced making it appear as though the mixture were boiling. Yeasts have been secretly creating alcoholic (fermented) beverages since ancient times in Asia, Egypt, Babylon, and many other early civilizations. However, no one knew what made the process work and what made the creation of such fermented beverages possible. When people think of traditional wine makers, it is not uncommon to picture someone standing in a large bucket mashing up grapes with their feet. These ancient wine makers realized that for some odd r...
This method is usually carried out on ready to eat food and processed meat and poultry. This method is a proven way to extend shelf life by killing microorganisms and pathogens, which are the reason processed meat such as deli meats last so long. However, there are negative effects of this method. There is a change in nutritional value and sensory value in foods that have been used in this process. It can change the flavour and can cause vitamin and protein destruction. However, non-thermal methods offer an extension in shelf life without changing the sensory values or nutritional values. It is a low cost method of food processing also. Non thermal methods have a big place in the future of food processing as consumers are becoming more aware of the nutritional value of the food, as well as wanting to save money and enjoy the flavour of the
One of the sectors facing the largest impact is the seafood industry. Fish products are prevalent in pet food products as well as human diets. Given such a high demand on the seafood industry,
During fermentation, the glucose is converted to carbon-dioxide and ethanol but, behind this simple concept is a series of complex biochemical reactions such as the ‘Glycolytic pathway’ involving various enzymes and the reactions take place anaerobically inside the cells of the brewing yeast. Beer processing involves series of steps starting from the reception of raw materials to the secondary fermentation and storage of the filtered and packaged
Fermentation is widespread used for extracting energy and commonly choose the materials with high concentrations of sugars / carbohydrates as substrates for the fermentation process. Fermentation is a metabolic and reduction process that converts organic compounds to methane, ethanol, lactic acid, lactose and hydrogen isolated from oxygen while the by-product is the fermentation residue. Fermentation process can be slower or interrupted by many factors: the oxygen, the light, temperature, unsuitable temperature, unsuitable reaction, unappropriate humidity or high environmental toxicity.
For fermentation to occur it requires a suitable grain to be in aqueous solution with water, it needs to have an appropriate yeast strain added (for alcoholic beverages), air needs to be removed and the mixture is needed to be kept at a constant 37˚c. The enzymes within the mixture convert the starch or sugar to glucose or fructose as shown in the equation: C6H12O6 → 2 C2H5OH+ 2 CO2 + heat. This is an oxidation-reduction reaction.
For a chef the idea of fermenting, aging, curing or drying a product to improve its flavour or create a completely new product like bread, beer or charcuterie, well it's what it is all about. So to delve into the weird science of brewing Kefir or Kombucha was right up my ally. The answer to what Kefir is? goes back hundred of years
Although lactic acid fermentation has its own process, for this type of fermentation to ever start glycolysis has to take place. Glycolysis is where glucose is oxidized to produce pyruvic acid. This process has a general summary of about four steps. The first step would be, two phosphate groups attach to a molecule of glucose, which forms a six-carbon compound that now has two phosphate groups. These phosphate groups are supplied by two ATP molecules, which are then converted back into ADP. The second step consists of the six-carbon compound being split into two three-carbon molecules called G3P (glyceraldehyde 3-phosphate). In the third step those two G3P molecules are oxidized, and receive a phosphate group. This creates a new-three carbon compound. Also in this third step there is a reduction to two molecules of NAD+ to NADH. The fourth step is the final step. In the fourth step the phosphate groups added in step 1 and 3 are removed from the three-carbon compounds
In alcoholic fermentation, the first process is when yeast changes natural sugars to alcohol, this is alcoholic fermentation. The second process is when a group of bacteria, called “acetobacter”, changes
Fermentation is one of the process of glycolysis, it is anaerobic, basically this means that it does not use air. Its end product is ethanol, which is a form of alcohol, ethanol differs from alcohol in its chemical composition. The end product of ethanol from glycolysis can be explained by the following equation.
Food has been a common source of necessity in our everyday lives as humans. It helps gives us nutrition and energy to live throughout our life. Over several decades, the development of making foods has evolved. They have changed from natural to processed foods in recent years. Nowadays natural ingredients are barely used in the making of foods like bread, cheese, or yogurt. The food industry today has replaced natural food making with inorganic ingredients. The cause of this switch is due to processed foods being easier, cheaper and faster to make. Artificial nutrition and processed foods have been proven to last longer in market shelves then natural foods. Also, due to artificial additives in processed foods they help satisfy consumers taste more than natural ingredients. The method of producing processed foods is common in today's food industry and helps make money faster and efficiently for companies. Examples of this can be found in all markets that distribute food. Even though processed foods may be easier and faster to make, they are nowhere near as healthy for consumers compared to natural foods. Natural foods are healthier, wholesome, and beneficial to the human body and planet then processed foods.
All types of alcohol go through a fermentation process, when looking sthe production beer, the fermentation process contains a series of distinct stages. Beer includes four main ingredients; some sort of grain (wheat, corn, barley), hops, water, and yeast. The beer process begins with the malting process, the stage where the grain is soaked in water for days to allow adequate germination time. This process is important because allowing the grain to germinate produces enzymes that are need to break down starch in succeeding steps. At times, the conversion of starch to sugar can begin during malting due to enzymes present within the grain, but the majority of the conversions begin in the next step (Michaels, 2010). Following the malting process, the grains go through a process called mashing, defined as the stage where the grain is hydrated causing the enzymes to activate and begin converting the starches into sugars. In the mashing stage enzymes are activated and begin to convert starch into sugars that will eventually go through the fermentation process.
Food-borne illnesses fall into two categories, intoxicant and infections. An understanding of the causes and preventions will limit any contaminations. The food preparation process emcompresses the sanitation process from
Food Preservation is the ways to retain the food quality in a longer times. It is to prevent the food decomposition and fermentation. Besides that, food preservation not only to prevent the food getting spoilt in a long period of time but also preserved the colour, taste and the food nutritive value. Nowadays, food preservation has become more and more important component in the food industry as the consumers expect that able to purchase those foods that are out of season or imported from other countries. Furthermore, there are few reason why food preservation is important in our daily life such as preservation foods when they are in season it may added variety choices in our meals for example smoke meats and