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Connecting West Africa with safe, reliable, and affordable air travel. Please send an email to  for charter services Please note that all packages will undergo mandatory security checks before being accepted for transport, and certain restricted items will not be eligible for shipping. We transport persons with disabilities (termed PWD) or persons with reduced mobility (termed PRM) of any kind unless there is a specific safety-related regulation that requires us not to do so. Africa World Airlines provides wheelchairs to any customer who may need such assistance. If you are not satisfied with our service, please send an email to , stating specific details of the issue.

• Lower aw substances tend to support fewer microorganisms since these get desiccated by the water migration.
• At the surface of planets and in their atmosphere, space restrictions do not apply, therefore, the ultimate limiting factor is water availability and thus the water activity.citation needed
• Isotherms can be used to help predict product stability over time in different storage conditions.citation needed
• If raisins of a higher water activity are packaged with bran flakes of a lower water activity, the water from the raisins migrates to the bran flakes over time, making the raisins hard and the bran flakes soggy.
• Astrobiologists presently consider that more favorable conditions could be encountered in the clouds of Jupiter where a sufficient water activity could prevail in the atmosphere provided that other conditions necessary for life are also met in the same environment (sufficient supply of nutrients and energy in a non-toxic medium).
• This relation can be checked by either verification or calibration using saturated salt-water mixtures, which provide a well-defined and reproducible air humidity in the measurement chamber.citation needed

Water activity is not simply a function of water concentration in food. For example, if honey (aw ≈ 0.6) is exposed to humid air (aw ≈ 0.7), the honey absorbs water from the air. As temperature increases, aw typically increases, except in some products with crystalline salt or sugar. You are required to present a valid, physical government issued ID during check-in for domestic flights and passports or visas (where applicable) for international flights. Africa World Airlines is a Ghanaian airline company.

Moisture content

The temperature at which dew forms on a clean surface is directly related to the vapor pressure of the air. This relation can be checked by either verification or calibration using saturated salt-water mixtures, which provide a well-defined and reproducible air humidity in the measurement chamber.citation needed Studies in powdered milk show that viable cells can exist at much lower water activity values, but that they never grow.citation needed Over time, bacterial levels decline. It is firmly established that growth of bacteria is inhibited at specific water activity values. They found that the values were not universal, but specific to each food product. Food formulators use water activity to predict how much moisture migration affects their product.citation needed

Extra luggage is available for GHC12 per kg on all domestic flights, US$4 per kilo on Accra-Lagos routes, and US$5 on Accra-Abuja routes. Under the Conditions of Carriage, we accept no liability for the loss of jewelry, other valuables, electronic gadgets, or money contained in checked baggage. Africa World Airlines does not accept liability for fragile, valuable, perishable articles, handles, zippers, or baggage that is packed in damaged or unsuitable containers. The extent of the airline’s liability https://aw33-nepal.com/bonuses is not based on the value of the bag or its content. Discover flights to major cities across Ghana and beyond.

Moisture content

As part of our unwavering commitment to ensure vital connectivity for all the communities under our care, Africa World Airlines is delighted to introduce our airport-to-airport courier service, available across all domestic destinations. Need to send critical items within the country but can’t travel yourself? All passengers are permitted up to 23kg of checked baggage for domestic flights and 23kg for regional flights, as well as 1 piece of hand luggage weighing not more than 5kg plus a handbag or laptop bag. Passengers should send all claims for baggage irregularities to  for vetting and processing. Indeed, Hallsworth et al. (2021) have determined a water activity of ≤ 0.004, two orders of magnitude below the 0.585 limit for known extremophiles. Early biotic diagenesis of sediments just below the ocean floor driven by microbial activity (e.g., of sulfate reducing bacteria) end up when the degree of compaction becomes too important to allow microbial life development.

Food and Drug Administration (FDA) regulations for intermediate moisture foods are based on these values. J. Scott first established that bacterial growth correlated with water activity, not water content, in 1953. Measurements can be made in as little as five minutes, and are made regularly in most major food production facilities.citation needed If raisins of a higher water activity are packaged with bran flakes of a lower water activity, the water from the raisins migrates to the bran flakes over time, making the raisins hard and the bran flakes soggy.

Capacitance hygrometers

The mirror is cooled until the dew point temperature is measured by means of an optical sensor. They should have regular calibration checks and can be affected by residual water in the polymer membrane (hysteresis). As the membrane adsorbs water, its ability to hold a charge increases and the capacitance is measured. Water activity values are obtained by either a resistive electrolytic, a capacitance or a dew point hygrometer. For many years, researchers tried to equate bacterial growth potential with water content.

Astrobiologists presently consider that more favorable conditions could be encountered in the clouds of Jupiter where a sufficient water activity could prevail in the atmosphere provided that other conditions necessary for life are also met in the same environment (sufficient supply of nutrients and energy in a non-toxic medium). There is net evaporation from a solution with a water activity greater than the relative humidity of its surroundings. Please report any cases of missing, delayed, or damaged luggage in writing immediately to Africa World Airlines staff at the airport you flew into, or send an email to For items lost on board or at the sales or check-in counters, please report immediately to the airport you flew into and fill out the appropriate forms for this to be investigated, or send an email to So, with a water activity in the Venus clouds 100 times lower than the threshold of 0.6 known in Earth conditions, the hypothesis envisaged by Greaves et al. (2020) to explain the biotic origin of phosphine in the Venus atmosphere is ruled out.citation needed Hallsworth et al. (2021) from the School of Biological Sciences at Queen’s University Belfast have studied the conditions required to support the life of extremophile micro-organisms in the clouds at high altitude in the Venus atmosphere where favorable temperature conditions might prevail.