Atmospheric water generators, systems and methods are presented involve user authentication, recording and tracking of water volumes dispensed by respective users over periods of various lengths, controlling component noise level and timing, and cleaning, heating and cooling the collected water more efficiently. The generators may be placed in network communication with other such generators to exchange water availability information therewith, or may communicate with a central server element by way of LAN, Internet, cell tower, peer-to-peer mesh or satellite. Information is conveyed to the user regarding the amount of water they consume from the water generators, and their resulting positive impact on the environment. Water dispensing data may be shared on the users' social media accounts, or used as inputs for competitions or games in order to further engage the user. User authentication may be accomplished by way of biometrics or an RFID/NFC tag embedded in the user's water vessel.

The invention relates to a method for removing, enriching, and acquiring the isotope .sup.3He relative to the isotope .sup.4He, comprising steps as follows: a) performing adsorption of a .sup.3He/.sup.4He-containing gas onto an adsorbent, and b) performing selective desorption, so that .sup.3He is released from the adsorbent.

The invention further relates to use of the removed, enriched, and acquired isotope .sup.3He obtained by means of the method for generating a temperature in the range from 0.01 to 0.05 K, preferably of 0.02 K, or as a contrast agent for nuclear spin tomography images.

The invention relates to a method for removing, enriching, and acquiring the isotope .sup.3He relative to the isotope .sup.4He, comprising steps as follows: a) performing adsorption of a .sup.3He/.sup.4He-containing gas onto an adsorbent, and b) performing selective desorption, so that .sup.3He is released from the adsorbent.

The invention further relates to use of the removed, enriched, and acquired isotope .sup.3He obtained by means of the method for generating a temperature in the range from 0.01 to 0.05 K, preferably of 0.02 K, or as a contrast agent for nuclear spin tomography images.

In one aspect, the disclosure relates to a hydroxamate-based resin for use in a .sup.44Ti/.sup.44Sc generator system. In an aspect, the carboxylate groups of a commercially available resin can be synthetically modified to produce an alkyl-substituted hydroxamate resin. In one aspect, the carboxylate resin can be a commercial resin. The disclosure also relates to a .sup.44Ti/.sup.44Sc generator system comprising an alkyl-substituted hydroxamate resin of Formula I and a method of producing .sup.44Sc, the method comprising decay of .sup.44Ti in a .sup.44Ti/.sup.44Sc generator system using an alkyl-substituted hydroxamate resin of Formula I. In an aspect, the alkyl can be methyl. The disclosure further relates to a .sup.172Hf/.sup.172Lu generator system comprising the use of an alkyl-substituted hydroxamate resin of Formula I and a method of producing .sup.172Lu comprising decay of .sup.172Hf in a .sup.172Hf/.sup.172Lu generator system using an alkyl-substituted hydroxamate resin. In an aspect, the alkyl can be methyl.