Abstract: Herbicides useful for controlling the proliferation of undesired plants. In particular, the use of at least one compound derived from chromene or chromane as a herbicidal agent, a phytotoxic composition including the at least one compound derived from chromene or chromane, as well as a method for treating and/or controlling plants using the at least one compound derived from chromene or chromane.

Abstract: The synthesis of chemical compounds having a dihydrobenzoxepine structure. In particular, a process for preparing chemical compounds having a 2,5-dihydro-benzoxepine structure by photochemical rearrangement from chemical compounds having a chromene structure. The process including a step of irradiating with ultraviolet radiation a solution in a solvent of the chemical compounds having a chromene structure.

Abstract: Altitude simulation breathing systems create at near sea level, oxygen partial pressure equivalents to a desired “simulated” above ground level altitude by gas mixing and induce low oxygen content (hypoxia) in a subject through the identical physiologic mechanisms as high altitude. At the heart of all prior art is the oxygen sensor; all decisions about gas mixing are based on a direct measurement of oxygen concentration. These sensors respond slowly requiring them to be used with a reservoir; a volume of gas maintained at a given oxygen concentration. The current invention uses flow based technology and eliminates reservoir associated shortcomings. Central to the function of the current invention is the ratiometric addition in real time of nitrogen to inspired room air which is unpressurized, uncontrolled, and inspired normally. In short, we present new technology to this field not based on oxygen concentration that offers significant improvements in safety, reduced mechanical complexity, and size.

Abstract: A system and method of filing documents electronically or otherwise where the documents are secured from modification. The security provides proof that the items to be submitted have remained unchanged since the encryption was applied. A first installation account within a first installation is created, the first installation account having second installation account information relating to a second installation. A user account is stored in the first installation having information stored therein for a user of the second installation. A submission envelope is secured using a digital signature from the first installation, and this submission envelope is stored in the first installation.