Comparative Chemistry of Sebum

Studies of sebum. IV. The estimation of squalene in sebum and sebum-like materials.

Studies of Sebum. II. Some constituents of the unsaponifiable matter of human sebum.

as one of the major constituents, accounting for about 16% of the unsaponifiable matter and about 35% of the hydrocarbon fraction. Some preliminary chemical tests were made for the fatsoluble vitamins, and the presence ofa small amount of vitamin E in human sebum was reported. A more complete study of the unsaponifiable matter has now been made, and this material has been more thoroughly examin...

Comparative Chemistry of Diffuse Clouds IV: CH

We observed the 3335 MHz (λ 9cm) F=1-1 line of CH toward a sample of diffuse clouds occulting compact extragalactic mm-wave continuum sources, using the old NRAO 43m telescope. Because radiofrequency observations of CH really must be calibrated with reference to a known CH abundance, we begin by deriving the relationships between CH, E B−V , H 2 and other hydrides found by optical spectroscopy.

Comparative chemistry of some aminoglycoside antibiotics.

In the field of antibiotics, the term 'aminoglycoside' is restricted in its use to those compounds in which the aglycone is a cyclitol or an aminocyclitol; the sugar moieties usually contain at least one amino-group. The three clinically important groups are exemplified by streptomycin (I), neomycin (II) and kanamycm A (III). This paper will be concerned largely with the kanamycin group and par...

Comparative Crystal Chemistry of Dense Oxide Minerals

Oxygen is the most abundant element in the Earth, constituting about 43 percent by weight of the crust and mantle. While most of this mass is incorporated into silicates, the next most abundant mineral group in the planet is the oxides. The oxide minerals are generally considered to be those oxygen-based minerals that do not contain a distinct polyanionic species such as OH, CO3, SO4 PO4, SiO4,...