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How does E. coli get into the urine?

Women are four times more likely to get E. coli infections than men, in part because the opening of the anus is so close to the opening of the vagina in a female's anatomy, states Everyday Health. In fact, there’s a 50 percent chance of a woman having at least one urinary tract infection in her lifetime. Women must practice good hygiene when cleaning up after bowel movements. Practicing good hygiene can also prevent sexual transmission of E. coli, which can be present on the skin and in the vagina during and after intercourse.\nNormally, E. coli is confined to the gastrointestinal tract..

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How does gas chromatography work?

Gas chromatography is best viewed as a type of race. A machine filled with a gas is used to help the mixture move throughout it. The mixture is injected into the machine with a syringe. The point of injection is the starting line. As the mixture moves through the tube, the different components of the mixture start to separate. It is similar to racers of different speeds running on a track. The faster component reaches the end of the machine, and it is identified. The other components follow relative to their speed in the machine.\nGas chromatography is a process that is used to analyze a varie..

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How do you find ISS sighting opportunities by city?

The website Nasa.gov offers specific information about viewing opportunities with a tool called Sighting Locations Lookup. Users select a country, region and city and receive details about when and if the space station is visible in that area. The information is provided in a table listing date and time, direction and degrees above the horizon, and length of time that the space station is visible.\nThe website iss.astroviewer.net also provides a tool for looking up potential viewing opportunities by geographic location. Earthsky.org gives valuable advice about how to spot the ISS using the det..

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What landforms are created by lava and ash?

Stratovolcanoes are an example of a landform caused by both lava and ash. A stratovolcano is full of lava flows, and the short, thick ones near its peak lead to steep slopes. The gradual slopes at the foot of a stratovolcano are the result of volcanic materials, such as ash, accumulating over time. When lava flows are relatively thin and build up over a central vent, the resulting volcano is known as a shield volcano.\nLava domes occur when lava piles up over a vent instead of flowing away from it. The edges of lava domes are prone to collapse, exposing gas-rich viscous magma, which makes them..

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Why is the density of a metal greater than the density of water?

To calculate density, the total mass of matter is divided by its total volume. For a constant volume, the higher the mass is, the denser the matter becomes. A cubic inch of steel and a cubic inch of water both occupy the same volume, but because the atoms in the cubic inch of steel are heavier than the atoms in the cubic inch of water, the density of the steel is higher than that of the water. Similarly, the smaller the volume occupied by a certain mass of material, the higher its density. A pound of wool and a pound of steel both have the same mass, but the wool occupies a much larger volume...

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What is the habitat of the phylum platyhelminthes?

Parasitic flatworms that cause human diseases include the many species of tapeworms and flukes. These parasites enter the food chain through infected livestock, both through meat from infected animals and plants fertilized with infected manure.\nFree-living species of flatworm do not cause disease, and some species are useful for pest control. Flatworms are used in Argentina to control malaria-carrying mosquitoes, and are used in Hawaii, Indonesia and the Philippines to control the spread of invasive snail species.

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What kind of plants are in the Gobi Desert?

The Gobi Desert also features a small number of edible plants, including wild garlic and wild onion. Taana is a kind of wild onion that herding animals eat.\nShrubs are also common plants in the Gobi Desert. These shrubs have to adapt to having little access to heat and water. Two such shrubs are the convolvulus and tamarix. Convolvus, also known as bindweed, beautifies the landscape with pale pink or white funnel-shaped flowers, and the plant never reaches more than 2 feet high. Tamarix is more tolerant of salt than convolvus and is also called salt cedar.\nAnother Gobi plant is saltwort, whi..

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What characteristic of the pellicle makes euglena different from true plants?

The pellicle is the outer envelope surrounding the euglena like a skin. It is thick and provides some structure, much like the cell wall in plants, but it is made up of protein instead of complex sugars.\nEuglenoids are considered neither plants nor animals, even though they do contain chloroplasts and create sugar from sunlight, as do plants. Euglena with pellicle layers that are arranged in a spiral around the cell are able to swim by twisting through the water. Any kind of locomotion is very uncharacteristic of plants.\nFurthermore, the presence of a cell wall made up of cellulose and other..

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How do two switches control one light bulb?

Light switches are able to turn a light on or off by interrupting the flow of electricity to the bulb. In a traditional light switch, current runs from a main electrical line within the house to the light fixture, with a standard switch in between. The electricity travels in a straight line from the source to the bulb, so the switch only has to interrupt one circuit to stop the flow. However, in a three-way switch, there is an extra wire that allows the two switches to connect together.\nWiring first runs from the power base to the first light switch. Next, the extra cable and the standard wir..

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What is the solubility of benzoic acid?

Benzoic acid has a solubility of 2.355 M in acetone, 0.766 M in benzene, 2.634 M in ethanol, 5.294 M in dimethylacetamide, 0.081 M in octane, 2.867 M in methanol, 0.664 M in toluene and 2.5 M in triethylene glycol. The solubility of benzoic acid is high in ethanol and reasonably high in chloroform. The solubility of benzoic acid increases when the temperature rises in the solution.\nSolubility is measured by attempting to dissolve substances in a given amount of solvent. The standard practice in chemistry is to use 100 milliliters of water or other liquids. Solubility can be listed as a certai..

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