C 226 INST-D 2013. 388 Ilustraciones de procesos de talla en madera y trabajo en carpintería.

49 fotografías, cuarenta a color y nueve en tono de grises.

C 227 INST-D 2013. 389 Productos en madera calados y tallados en alto relieve.

8 fotografías a color.

C 228 INST-D 2013. 390 Juguetes y productos decorativos elaborados en madera tallada y torneada.

14 fotografías, trece a color.

C 229 INST-D 2013. 391 Ilustraciones de máscaras del carnaval de Barranquilla talladas en madera.

9 fotografías a color.

C 230 INST-D 2013. 392 Productos de menaje de cocina y comedor elaborados en madera tallada y torneada.

24 fotografías, dieciocho a color.

C 233 INST-D 2013. 395 Muebles en madera de diversos géneros de función y combinación de materiales.

20 fotografías, nueve a color y once en tono de grises (los archivos digitales de algunas fotografías son de muy bajo pixelaje).

C 231 INST-D 2013. 393 Productos del ejercicio de capacitación a indígenas desplazados a Bogotá.

9 fotografías a color.

C 234 INST-D 2013. 396 Productos en totumo y calabazo del Casanare decorados con figuras labradas, pirograbadas y pintadas

26 fotografías a color (los archivos digitales de algunas fotografías presentan bajo nivel de pixelaje).

C 232 INST-D 2013. 394 Tallas zoomorfas de productos decorativos elaborados en madera de diversos tipos.

Documento de 76 fotografías, setenta y una a color.

The world mission of the Christian religion, by Wade Crawford Barclay; C.A. Bowen, D.D., general editor.

http://www.archive.org/details/worldmissionofth012478mbp

Physicochemical characterization of bioactive polyacrylic acid organogels as potential antimicrobial implants for the buccal cavity

This study describes the formulation and physicochemical characterization of poly(acrylic acid) (PAA) organogels, designed as bioactive implants for improved treatment of infectious diseases of the oral cavity. Organogels were formulated containing a range of concentrations of PAA (3-10% w/w) and metronidazole (2 or 5% w/w, representing a model antimicrobial agent) in different nonaqueous solvents, namely, glycerol (Gly), polyethylene glycol (PEG 400), or propylene glycol (PG). Characterization of the organogels was performed using flow rheometry, compressional analysis, oscillatory rheometry, in vitro mucoadhesion, moisture uptake, and drug release, methods that provide information pertaining to the nonclinical and clinical use of these systems. Increasing the concentration of PAA significantly increased the consistency, compressibility, storage modulus, loss modulus, dynamic viscosity, mucoadhesion, and the rate of drug release. These observations may be accredited to enhanced molecular polymer entanglement. In addition, the choice of solvent directly affected the physicochemical parameters of the organogels, with noticeable differences observed between the three solvents examined. These differences were accredited to the nature of the interaction of PAA with each solvent and, importantly, the density of the resultant physical cross-links. Good correlation was observed between the viscoelastic properties and drug release, with the exception of glycerol-based formulations containing 5 and 10% w/w PAA. This disparity was due to excessive swelling during the dissolution analysis. Ideally, formulations should exhibit controlled drug release, high viscoelasticity, and mucoadhesion, but should flow under minimal stresses. Based on these criteria, PEG 400-based organogels composed of 5% or 10% w/w PAA exhibited suitable physicochemical properties and are suggested to be a potentially interesting strategy for use as bioactive implants designed for use in the oral cavity. © 2008 American Chemical Society.

An examination of the rheological and mucoadhesive properties of poly(Acrylic acid) organogels designed as platforms for local drug delivery to the oral cavity

This study examined the rheological/mucoadhesive properties of poly (acrylic acid) PAA organogels as platforms for drug delivery to the oral cavity. Organogels were prepared using PAA (3%, 5%, 10% w/w) dissolved in ethylene glycol (EG), propylene glycol (PG), 1,3-propylene glycol (1,3-PG), 1,5-propanediol (1,5-PD), polyethylene glycol 400 (PEG 400), or glycerol. All organogels exhibited pseudoplastic flow. The increase in storage (G') and loss (G '') moduli of organogels as a function of frequency was minimal, G '' was greater than G '' (at all frequencies), and the loss tangent <1, indicative of gel behavior. Organogels prepared using EG, PG, and 1,3-propanediol (1,3-PD) exhibited similar flow/viscoelastic properties. Enhanced rheological structuring was associated with organogels prepared using glycerol (in particular) and PEG 400 due to their interaction with adjacent carboxylic acid groups on each chain and on adjacent chains. All organogels (with the exception of 1,5-PD) exhibited greater network structure than aqueous PAA gels. Organogel mucoadhesion increased with polymer concentration. Greatest mucoadhesion was associated with glycerol-based formulations, whereas aqueous PAA gels exhibited the lowest mucoadhesion. The enhanced network structure and the excellent mucoadhesive properties of these organogels, both of which may be engineered through choice of polymer concentration/solvent type, may be clinically useful for the delivery of drugs to the oral cavity.

Exchange systems and style in the Central Mediterranean. 4500-1700 b.c..:Unpublished PhD. Cambridge University Library

Malone, C.A.T., 1986, Unpublished PhD, Cambridge University, Cambridge.