What is the relationship of time to temperatures in heat sterilization?
Dry heat = 1-2hrs @ 160-170 degrees Celsius
Moist heat = 15min. @ 121 degrees Celsius
Mechanism of killing by dry heat Dry heat kills the organisms by destructive oxidation of essential cell constituents Killing of the most resistant spores by dry heat requires a temperature of about 160 °C for 60 minutes Dry heat is employed for glassware; syringes, metal instruments and paper wrapped goods, which are not spoiled by high temperatures. It is also used for anhydrous fats, oils and powders that are impermeable to moisture. Mechanism of killing… Read More
endothermic means it is absorbing heat. the heat within the organism would be warmer than the surrounding environment over time. Read More
The pasteurization is carried out for a prolonged time at around 170°F and is supposed to kill only heat susceptible organisms and their spores, while sterilization works at a temperature of 250°F and is supposed to kill all organisms. Read More
They are different sterilization methods for medical instruments, consumables, devices and Implantable devices. Depending on the nature of the product to sterilize is the method used. Sterilization can be achieved through application of heat, chemicals, irradiation, high Pressure or filtration. Heat Sterilization is divided in two categories: Dry Heat Sterilization Moist Heat sterilization Dry heat sterilization of an article is one of the earliest forms of sterilization practiced. Dry heat, as the name indicates, utilizes… Read More
This heat is necessary for us to survive. If the atmosphere did not trap heat, night time temperatures would drop well below zero. Read More
power rating is the rate of moving energy their relationship in the amount of heat it produce it divided by time to move that much energy Read More
When two objects have heat transferred between them do they have the same or different temperatures?
OK, let's see an example. Two objects of the same mass and same material (for simplicity) have temperatures of 50Â° and 60Â°, respectively. When heat is transferred between them, they may have temperatures of, say, 51Â° and 59Â°; later 52Â° and 58Â°, etc.; this will continue until they have the same temperature. But if they only have contact for a brief time, they will not necessarily have the same temperature - it needs a certain… Read More
Oceans make temperatures less extreme, was water tends to take a long time to heat up and cool down. Read More
Since different objects have different heat conductivity and different temperatures and heat capacities, the time can vary without limit. Read More
I would take a wild guess and say around noon time. The time when the maximum earth reradiation of heat and the incoming heat are at their combined greatest. A little after 4pm Read More
Why does dry heat require higher temperatures for longer time periods to sterilize than does moist heat?
Water has a higher heat capacity than air. In other words, air is a very poor conductor of heat while water is a very efficient conductor of heat. Read More
Steam sterilization uses much less energy and time than dry heat methods. In order to kill spores a dry heat sterilizer needs to reach and maintain 170Â°C for one hour. An autoclave only needs to reach 121Â°C for 15 minutes. Read More
High temperatures is the flower killer for tomato plants. If you live in the south where temperatures hover in 90's for any extend length of time, you will want to plant a tomato plant that is breed for high heat. Read More
Incomplete sterilization in the autoclave can be caused by inadequate temperature. It can also be caused by improper processing time or a leaky door seal. Read More
The 1995 Chicago Heatwave was a summer heat wave that resulted in hundreds of deaths. The temperatures averaged between the highs of 43 degree Celsius and the low's of 26 degree Celsius during night time. Read More
Can a 100ml sample of water and a 500ml sample of water have the same temperature and same amount of heat?
The same temperature - yes, the same heat content - not. Read More
No. The phase of the moon has no relationship to the temperature here in Earth at all. However, the fact that you can see the full moon tells us that it is night time, and that the sky is clear. Clear skies at night do allow the Earth's heat to radiate away into outer space. Moonlight subjectively feels colder, because we naturally associate light with heat, and the Moon's light gives no heat. So you… Read More
It is inadvisable to travel to Alice Springs in the middle of summer if you are unusued to dry heat. Temperatures easily exceed 40 degrees Celsius in summer. Night time temperatures in winter are bitingly cold, but the days are very pleasant. Best times to travel to Alice Springs are March-May and August-October. Read More
If one continously heats a particular magnet to high temperatures or long time or both, it loses it magnetism because the particles get excited and start forming no-magnetic arrangements. Read More
There are two possible answers for this question. if you boil freshwater, then record the temperatures for an hour n five minute intervals, then another day boil saltwater, and record those temperatures, the answer is freshwater. but if you start oiling the freshwater and saltwater at the same time, then start recording the temperatures once the water starts boiling, the answer would be saltwater because saltwater takes a longer time to boil. but the true… Read More
In most cases, the water temperature only affects land temperatures when the land is in relatively close proximity to the water. The winds will flow accross the warmer water and carry the radiated heat over the land closest to the shoreline. As the wind blows further inland, the affects of the water are slowly dropped off. In contrast, the air temperatures can SLOWLY affect the water temperatures. Over time, cooler/warmer air temps will cool/warm the… Read More
How does an increase in the amount of carbon dioxide in the atmosphere affect atmospheric temperatures?
CO2 is transparent to "visible light" (sunlight), but opaque to infra-red (heat radiation). Thus heat gets in from the sun normally, but is retarded when it is time to re-radiate it back into space (at night). Read More
When they first hatch and for the first few weeks of growth. You can also use a heat lamp if the temperatures in the chicken coop drop well into the minus zero levels in the deep winter. Most time a few small red 100 watt bulbs will provide enough heat at night. Read More
"Infant formulas are heat treated to maintain the bacteriologic quality of the product. This can be done traditionally by either retort sterilization or high-temperature short-time (HTST) treatment. Recently Ultrahigh-temperature treated formula has become more commonly used. If powdered formula is made, then an additional spray drying would be required after this. Retort sterilization is a traditional retort sterilization method that uses 10-15mins treatment at 118°C. Ultrahigh-temperature (UHT) is a method that uses a brief (2-3… Read More
Because you are using two positively charged nuclei you must have a lot of heat to overcome the repelling nature. At the moment on earth we cannot get to these temperatures - therefore at this present time it is not used. Read More
Global warming is causing climate change. More heat in the atmosphere is more energy in the atmosphere. This is changing winds and rainfall patterns, like the polar vortex that caused blizzards in some parts of North America in early 2014. At the same time Alaska had higher than normal temperatures and southern Australia and Africa had massive heat waves. Read More
what is relationship between space and time Read More
The rash disappears in a day with cooler temperatures, but the skin may not recover its ability to sweat for two weeks-the time needed to replace the top layers of skin with new growth from below. Read More
Yes. Even a warmblooded animal is capable of freezing to death, and needs heat to survive. However, because of their better regulated internal body temperatures, warmblooded animals can survive for a longer time than cold-blooded animals in a cold place. Read More
More towards spring time. Typically March-June. Therefore, you won't be facing cold temperatures nor extreme heat. Also you won't have to worry about the occurence of a possible hurricane.. depending on the locations of your cruise. Read More
If the dog is left outside in extreme temperatures for long periods of time with no water, food, or shelter then YES. That dog will probably die. Over-heating, heat-stroke, dehydration, and other problems can cause death if a dog is left outside is severely hot temperatures. If you leave a dog outside, make SURE it has plenty of fresh water and food- WITHIN REACH and some shade to lay down in. Read More
Oceans are able to absorb and holds energy from sunlight A thermal exchange Ocean absorbs and releases thermal energy much more slowly than dry land. Have heat, will travel Different temperatures at different locations. Read More
Humidity is the amount of water vapor in the air at a given time At warm temperatures air can hold more moisture than it can at cold temperatures?
Humidity is the amount of water vapor in the air at a given time. At warm temperatures, air can hold more moisture than it can at cold temperatures. Read More
A line graph to compare temperatures over time. A bar graph to compare temperatures at different locations (cities), for example. Read More
A Trombe wall is basically a large heat gathering surface with enough mass to retain the heat that it gathers. The idea is that it can gather the heat and store it during the day when the sun is shining on it, then release the heat at night to keep the interior temperatures warm. The ones that I am familiar with are made of something like concrete, earth, or water. They will be directly in… Read More
Yes, cooking temperatures are very important. Temperatures effect the amount of cooking time and ensures that food is thoroughly cooked. Temperatures also effect the texture and tenderness or toughness of meats and vegetables. Read More
I think its each individuals personal choice for sterilization. I do however think that before doing this procedure each person needs assess this choice and at least wait until they hit the age of 25, this gives them time to experience life and make an objective choice. Read More
What is the relationship between the moon's surface gravity lack of an atmosphere and temperature range?
The Moon's gravity causes the lack of atmosphere (any possible atmosphere evaporates out into space in a fairly short time); and the lack of atmosphere causes the extreme temperatures. Read More
not very, it depends whether we either have high pressure or low pressure. We usually have tonnes of rain, wind and below average temperatures, the best time for heat is in June. The south definitely has the best weather. Read More
The best time to plant flowers depends on where you are, and what the temperatures are in your area. Certain flowers can withstand cooler temperatures than others, but most flowering plants perform best when planted when temperatures no longer get near freezing at night. Read More
The best time to breed ANY horse breed is in the summer. When daylight is in its prime, so is the mare's heat. This is how it was planned in the wild. When bred in the early summer, foals were born in late spring, when grass was at its best, the temperatures were warm, and the foal had a long time until the cold winter. Read More
No one should settle for a part time relationship! Read More
No, helium is not a gas all the time. At extremely high temperatures it becomes a plasma, and at extremely low temperatures it becomes a liquid. It does not have a solid phase, however. Read More
Guys only ask for time in a relationship when they want to explore other options and they are looking for a way out of the current relationship Read More
over crowding packs, insufficient time, insufficient temperature, inadequate steam levels Read More
Genetic mutation does not always lead to sterilization as you point out. This however is not the way evolution happens. Evolution occurs mainly through small adaptive changes over a long period of time that are not mutations. Evolution does not happen suddenly. Read More