Colocolic Intussusception in an Adult Patient Secondary to Caecal Adenocarcinoma.

Acute intestinal invagination is the pathology of infants and small children. Its occurrence in adults is rare, and it represents 1 to 5% of intestinal occlusions often leading to the discovery of an organic cause that may be tumor. We report the case of a 72-year-old patient admitted to the emergency room of Ibn Sina Rabat, Morocco, for intestinal occlusion.

A paraduodenal hernia revealed by bowel obstruction: case report and literature review.

Internal hernias are defined as the protrusion of abdominal viscera through an aperture in the intraperitoneal recesses, they are considered as a rare cause of intestinal obstruction. The paraduodenal hernias are the most common type of congenital hernia especially the left-sided ones. We report a case of a 46 year-old man presenting a left paraduodenal hernia with acute small bowel obstruction, which was firstly (preoperatively) assigned to a tumoral cause.

Color Doppler imaging of orbital vasculature before and after orbital decompression in thyroid eye disease.

: To measure alterations in orbital blood flow parameters using color Doppler imaging (CDI) before and after orbital decompression in patients with moderate to severe thyroid eye disease (TED). : Resistance index (RI) and maximum and minimum velocity of ophthalmic artery (OA), superior ophthalmic vein (SOV), and central retinal artery (CRA) of 24 eyes (14 patients) with TED were measured before and at least 3 months after cosmetic orbital decompression procedure (single or double walls) using CDI. Complete eye examination was performed to define the severity (EUGOGO classification) and activity (clinical activity score) of TED.

[Hydatid cyst of the parotid gland: six cases].

Primary hydatid cyst of the parotid gland is still an exceptional localization. The parotid gland is an uncommon site, even in our country, in which echinococcal disease is endemic. We report six cases of primary hydatid cyst of the parotid gland who presented with an isolated mass.

Adsorption properties of novel gemini surfactants with nonidentical head groups.

Novel environmentally friendly gemini surfactants, each with two hydrophilic and two hydrophobic groups, have been synthesized and their physicochemical properties investigated. One of the hydrophilic groups is a methyl-capped polyoxyethylene chain with mol wt 350, 550, and 750 g/mol, respectively, and the other is a sulfate group; the hydrophobic part of the surfactant is made from oleylnitrile. This nitrile derivative of the fatty acid is used to achieve good hydrolytic stability.

Interaction between a novel gemini surfactant and cyclodextrin: NMR and surface tension studies.

The interaction between cyclodextrins, hydroxypropyl-beta-cyclodextrin (HPbetaCD), and hydroxypropyl-gamma-cyclodextrin (HPgammaCD) and a novel type of nonionic surfactant synthesized from a fatty acid has been investigated. The so-called nonionic heterogemini surfactant (NIHG750) contains two hydrophobic groups and two hydrophilic groups, composed of one monomethyl ethylene glycol and one secondary OH group, CH(3)(CH(2))(7)-CH[OH]-CH[O(CH(2)CH(2)O)(16)CH(3)]-(CH(2))(7)CN. Surface tension studies indicate that micelles form in NIHG750 systems in both the presence and the absence of small quantities (molar ratio (HPbetaCD:NIHG750) approximately 2) of cyclodextrin (HPbetaCD or HPgammaCD).

[Clinical case of the month. Peritonitis after spontaneous rupture of pyonephrosis. A case report].

Peritonitis after spontaneous rupture of pyonephrosis is a rare complication, usually diagnosed intraoperatively. We report the case of a 35 year old woman who was admited for an acute abdomen. Ultrasound showed features of acute peritonitis, with left pyonephrosis, confirmed by a CT-SCAN.

Interactions between a nonionic gemini surfactant and cyclodextrins investigated by small-angle neutron scattering.

The microstructure of complexes between hydroxypropyl-cyclodextrins (HPCDs) (alpha, beta, and gamma) and a novel gemini surfactant has been investigated by small-angle neutron scattering (SANS). This nonionic hetero-gemini surfactant (denoted NIHG750) contains two hydrophobic groups and two hydrophilic groups. One is a methyl-capped polyoxyethylene chain with 16 oxyethylene units and the other is a secondary hydroxyl group.

Heterogemini Surfactants Based on Fatty Acid Synthesis and Interfacial Properties.

A series of novel nonionic surfactants based on fatty acids, each with two hydrophilic and two hydrophobic groups in the molecule (so-called Gemini surfactants), have been synthesized. The hydrophobic part of the surfactant, made from oleylnitrile, has a double bond in the middle of the chain to which the hydrophilic part is attached. One of the hydrophilic groups is a methyl-capped polyoxyethylene chain with 11 or 16 oxyethylene units, whereas the other is a secondary hydroxyl group.

A Comparison between Hydrophobically End-Capped Poly(ethylene oxide) with Ether and Urethane Bonds.

Two models of HEUR (hydrophobically modified ethylene oxide urethane) associative polymers (AP) are compared. The two polymers are polyethyleneoxides simply end-capped with dodecyl groups, one through an ether bond H25C12-O-(CH2CH2O)304-C12H25 (AP14, Mw = 13,700) and the other through an urethane bond H25C12-NHCOO-(CH2CH2O)304-CONH-C12H25 (AP14NCO, Mw is about the same as for AP14). The results indicate that this subtle difference in polymer architecture dramatically influences the initial association and the clouding of the polymer in water, so that AP14NCO starts to aggregate earlier but has a higher clouding temperature.