Clinical and Sociodemographic Features of Alopecia Areata in Five Colombian Cities: An Analysis of the RENAAC Registry.

Background: Alopecia areata (AA) is an autoimmune disease characterized by non-scaring hair loss and preservation of hair follicles. The information available on disease course, and clinical features of AA is scarce worldwide, and almost nonexistent in Colombia.

Objective: To determine the clinical and sociodemographic characteristics of patients diagnosed with AA who presented to a dermatology consultation in five Colombian cities.

Clinical and Sociodemographic Features of Alopecia Areata in Five Colombian Cities: An Analysis of the RENAAC Registry.

Background: Alopecia areata (AA) is an autoimmune disease characterized by non-scaring hair loss and preservation of hair follicles. The information available on disease course, and clinical features of AA is scarce worldwide, and almost nonexistent in Colombia.

Objective: To determine the clinical and sociodemographic characteristics of patients diagnosed with AA who presented to a dermatology consultation in five Colombian cities.

Syntheses, Structures, Reactivities, and Basicities of Quinolinyl and Isoquinolinyl Complexes of an Electron Rich Chiral Rhenium Fragment and Their Electrophilic Addition Products.

Reactions of Li [(η -C H )Re(NO)(PPh )] with 2- and 4-chloroquinoline or 1-chloroisoquinoline give the corresponding σ quinolinyl and isoquinolinyl complexes 3, 6, and 8. With 3 and 8 there is further protonation to yield HCl adducts, but additions of KH give the free bases. Treatment of 3 with HBF ⋅OEt or H(OEt ) BAr gives the quinolinium salts [(η -C H )Re(NO)(PPh )(C(NH)C(CH) C(CH)(CH))] X (3-H X ; X =BF /BAr , 94-98 %).

[n]-Oligourea-Based Green Sorbents with Enhanced CO2 Sorption Capacity.

A new series of [n]-oligoureas ([n]-OUs, n=4, 7, 10, and 12) green solid sorbents was prepared following a base-catalyzed, microwave-assisted oligomerization reaction. The materials were characterized by NMR and IR spectroscopy, elemental analysis, thermogravimetric analysis, differential scanning calorimetry, and XRD. Decomposition temperatures at 50 % weight loss (Td50 ) were ca.